transformation project on energy saving and …documents.worldbank.org/curated/en/...on energy...

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E1786 v5 Project Proposal for World Bank Global Environment Fund

ENVIRONMENTAL IMPACT SPECIFIC APPRAISAL

for

TRANSFORMATION PROJECT ON ENERGY SAVING AND EMISSION REDUCTION OF

YANGQUAN YANGGUANG POWER GENERATION COMPANY LTD. SHANXI

China Institute for Radiation Protection

November, 2007

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Project Name: Transformation Project on Energy Saving of Yangguang Power

Generation Company Ltd. Shanxi

Document Type: Environment Impact Specific Appraisal

Legal Representative of Appraisal Organization: Xuan Yiren

Contact person: Ma Hongyou

Contact Phone: (0351)2203007 Fax: (0351)2202377

Person in charge of the project: Ma Hongyou (Registered No. A13020110400)

Shi Xuefeng (ID No. of employment:L A13020095)

III

Persons in charge of each special issue for Environment Impact Specific Appraisal

Special issue Person in charge

Specialty Professional title

Qualification No.

Signature

Preface Shi Xuefeng

Environmental engineering

Assistant researcher

A13020095

Summary of existing project

Liu Hui Environmental planning and management

Deputy rearcher

A13020010500

Summary of Energy Saving and Reform Project

Shi Xuefeng


Assistant researche

A13020095

Summary of environment of regions effected by proposed project


Deputy rearcher

A13020010500

Analysis to environment impact of proposed project and policy for pollution protection

Zhang Jianxin


Senior engineer

A13020020400

Plan comparision and plan determination

Shi Xuefeng


Assistant researche

A13020095

Management plan for environment

Zhang Jianxin


Senior engineer

A13020020400

Public participation


Deputy rearcher

A13020010500

Conclusion Shi Xuefeng


Assistant researche

A13020095

Ma Hongyou

Environmental science

Deputy rearcher

A13020110400General editors of the report Zhang

Jianxin Environmental engineering

Senior engineer

A13020020400

IV

Contents

1 Preface

1.1 Project background and task origin······················································1

1.2 Appraisal goals ····················································································3

1.3 Basis of compiling ···············································································3

1.4 Identification of key environment issues and the factors of environment

impact··································································································5

1.5 Appraisal focus····················································································8

1.6 Appraisal grade····················································································9

1.7 Appraisal criteria ·················································································9

1.8 Environment sensitive area and protection targets ····························12

1.9 Security and ensure policies of WB ···················································13

2 Summary of project and engineering analysis

2.1 Summary of existing project ······························································14

2.2 Project analysis of transformation on energy sving····························25

3 Environmental situation of area affected by proposed project

3.1 Summary of natural environment·······················································48

3.2 Summary of social environment ························································50

3.3 Summary of ecological environment ·················································52

3.4 Living quality ····················································································52

3.5 Current situation of environmental quality·········································52

4 Analysis to environmental impacts of proposed project and

countermeasure to prevent and control the pollution

4.1 Analysis to environmental impact in implementation period ·············58

4.2 Analysis to environmental impact in operation period ·······················61

4.3 Analysis to social and environmental impact ·····································62

V

4.4 Analysis to positive environmental impacts of energy saving and

emission reduction···········································································63

5 Comparison and selection of plans

5.1 Analysis of zero option······································································65

5.2 Comparison and selection of optional plans·······································67

6 Environmental management and monitoring plan

6.1 Key impacts to environment and measure to reduce them··················61

6.2 Environmental management plan·······················································73

6.3 Environmental monitoring plan ·························································88

7 Public participation

7.1Goals of public participation·······························································92

7.2 Way of public participation ·······························································92

7.3 The 1st time public participation ························································93

7.4 The 2nd time public participation························································97

7.5 Exposure of information ····································································98

7.6 Brief summary·················································································100

8 Conclusion and suggestions

8.1 Conclusion·······················································································100

8.2 Suggestions······················································································106

Appendix Calculation formula for energy saving and emission reduction

Appendix “Letter of Authorization for Environment Impact Appraisal on the

Transformation Project of Energy Saving for Yangguang Power Generation Company Ltd. Shanxi”

1

Environmental Impact Report on Transformation of Energy Saving and Emission Reduction for

Shanxi Yangguang Power Generaration Company Ltd.


1 Preface 1.1 Project background and task origin

Located in the boundary of Pingding County, Yangquan City, Shanxi Province, Shanxi Yangguang Power Generation Company Ltd. (Hereinafter refers as Yangguang Power Plant) is 4km away from the county seat and 15km to Yangquan City with an easy access for transportation, and the Expressway from Taiyuan to Shijiazhuang is at the north of the company. The plant covers an area of about 39 hectre and there are 1542 staff in the company.

With a total installed capacity of 4×300MW condensing coal-burning steam

turbine and a boilter total evaporating capacity of 4100t/h, Yangguang Power Plant is a national key construction project. Since the beginning of preparation for construction in 1984, the construction of plant was begun on December 1993 and 4 generator sets began to generate power from December 1996 to November 1999 successively.

According to the requirements of the relative policies, Yangguang Power Plant

has made transformation to the existing 4 generator sets by using Limestone-Gypsum Wet Method Desulfurization Technology (using limestone-gypsum method) and the desulfurization efficiency is 90% and the plant has also implemented the transformation of dust catcher at the same time. At present, the transformation of desulfurization for 4 boilers has been finished and all put into operation. The electrostatic precipitators from No.2 and No.4 boiler have been transformed into bag filters and put into use and the dust collection rate has been increased from former 99% into current 99.9%. The control system of electrostatic precipitators of No.1 and 3 boilers has been upgraded and transformed. Through the transformation of precipitators and desulfurization system, the soot and SO2 emissions from the plant will be greately reduced to lighten the impact to local environment.

The state government has paid very special attention to the energy saving and

emission reduction and state Development and Reform Commission issued “the Notice on the Publication and Issue on Mid-Term and Long-Term Special Planing of Energy Saving” in 2004, requiring that the transformation of thermal power plants should be regarded as the key field and key project, the coal consumption of thermal power plants in 2010 should meet the target of 360g standard coal/kwh, and in 2020 the target of 320g standard coal/kwh. On May 23, this year, the State Council issued “A Notice on Comprehensive Operation Plan for Energy Saving and Emission Reduction”, illustrating that the current situation is very serious to realize the target of energy saving and emission reduction and putting forward various kinds of operation

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plans for the implementation of energy saving and emission reduction to form the energy saving capacity of 240 million tons of standard coal during the period of “11th Five-Year Plan” and the capacity of 50 million tons of standard coal in this year. It also said that 10 key energy saving projects as the transformation project of industrial boiler (kiln), regional cogeneration engineering project, the project of waste heat and excess pressure utilization, the project of oil saving and oil substitutation, energy saving project of motor system, optimization project of energy system, energy saving project of building, green lighting project, energy saving project of governmental organization, the project of monitoring for energy saving and technical service system construction are the key points to be implemented and among those the thermal power plants are the most important area to be transformed.

In recent years, Yangguang Power Plant has also responded to the national policy

on energy saving and emission reduction, paying the most important attention to the work of energy saving and emission reduction and activitely applying the new technology and process on energy saving to try its best to reduce the energy consumption of the plant. For an example, the plant has implemented transformation of frequency conversion energy saving to circulation pump, condensing pump and fuel pump successively to farthest save the power consumption and to air pre-heaters from No.1 and No.2 boilers to save coal consumption, resulting in a favorable benefit on energy saving.

As the completion of transformation and putting into operation of desulfurization

system and precipitators of Yangguang Power Plant and as the increase of power consumption of running equipment, the power utilization rate will increase about 1.5% and coal consumption about 3-4g/kwh and bring some impact on the economic operation for the power plant. To farthest overcome the side impact caused by these factors to the economic operation of the plant, it should enlarge the investment to the projects of energy saving to reduce the energy consumption as much as possible.

The transformation project on energy saving of Yangguang Power Plant includes

four sub-projects: The transformation project of frequency conversion of primary fan from No.1 boiler, Online Monitoring Equipment Project for coal powder pipe on No.4 boiler, the transformation project of steam seal for No.4 boiler and the software development project of inverse balancing for coal consumption calculation of the whole plant. After the implementation of these projects, every year the plant can save

18,760 tons of standard coal, the reduction volumes of producing soot, SO2 NO and

CO2 will be 6922t/a, 732t/, 170t/a and 49939t/a and the emission reduction volumes of soot, SO2, NOX and CO2 will be 6.9t/a, 73.2t/a, 170t/a and 49939t/a. The total investment of the project is 14.22 million yuan which will be submitted to World Bank for the financing from Global Environment Fund.

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The project should process environment impact appraisal according to the regulations from “Environment Impact Appraisal Law of PRC” and “World Bank Operation Guidebook-Environment Impact Appraisal”. Yangguang Power Generation Company Ltd. of Shanxi Province entrusted China Academy of Radiation Protection on August 1st, 2007 to be in charge of the environment impact appraisal for the transformation project of energy saving.

1.2 Appraisal goals

The environment impact appraisan of this project has made analysis to the technical standard, index of energy saving, economic index and investment and operation cost through the combination with the engineering characteristic of the transformation of energy saving project and the comparison of the alternative plans to finally determine the selected plan. A complete and systematic analysis has been made to the positive and negative impacts caused by the project during the implementation period and operation period to local environment and social environment and the feasibility of the construction of the project has been conducted from the point of environmental protection. The management plan of environment protection and environment monitoring plan of the project are confirmed through the integration of suggestions from public participation.

1.3 Basis of compiling

1.3.1 Basis of task Yangguang Power Generation Company Ltd. Shanxi, “Letter of Authorization for Environment Impact Appraisal on the Transformation Project of Energy Saving for Yangguang Power Generation Company Ltd. Shanxi” (See appendix) August 1st,2007.

1.3.2 Basis of laws, regulation and policies

(1) Environment Protection Laws of PRC December 1989.

(2) Air Pollution Prevention and Control Laws of PR Revised on

Aprin, 2000.

(3) Detailed Rules of Implementation for Water Pollution Prevention and

Control of PRC Revised on March 2000.

(4) Environment Noise Pollution Protection and Control Laws of

4




PRC December, 1996.

(5) Solid Waste Pollution Protection and Control Laws of PRCRevised

on December, 2004.

(6) Environment Impact Appraisal Laws of PRC October, 2002.

(7) Promotion Laws on Clean Production of PRC June, 2002.

(8) The Order of State Council of PRC No. 253Regulations on

Environment Protection and Management for Construction

Project November, 1998.

(9) The Order of State Environment Protection Bureau No. 14The List for

Classification Management of Environment Protection for Construction

Project January, 2003.

(10) The Order of State Development and Reform Commission of PRC

No.40 Directory of Guiding the Industrial Structure Reasjustment(2005

Version) December, 2005.

(11) Huanfa No. [2006]28, State Environment Protection

Bureau Temporary Measure on Public Participation of Environment Impact

Appraisal March, 2006.

(12) Huanjian No. [1993]324, State Environment Protection BureauNotice

on Strengthening the Management of Environment Impact Appraisal for

Construction Project Financed by International Fund OrganizationJune

21th, 1993. (13) Fagaihuanzi No. [2004]2505 by State Development and Reform

Commission Notice on Publication and Issue of Mid-Term and Long-Term

Special Planning for Energy Saving November 25, 2004.

(14) Guofa No. [2005]39 by State CouncilDecision on Carrying out

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Scientific Outlook of Development and Strengthening Environment

Protection 2005.

(15) Guofa No. [2006]28 by State CouncilDecision on Strengthening

Energy Saving August 6, 2006.

(16) Guofa No. [2007]15 by State CouncilNotice on the Publication and

Issue of Integrated Operation Plan for Energy Saving and Emission

Reduction May, 23, 2007.

1.3.3 Related Regulations from World Bank

� World Bank OP/BP4.01 and AnnexEIA January, 1999.

� World Bank OP/ EIA January, 1999.

� World Bank GP4.01 EIA January, 1999.

� World Bank OP/BP4.04 Natural Habitated Land September, 1995.

� World Bank GP4.07 Management of Water Resource December,

2000.

(6) World Bank GP14.70 Participation of NGO in WB Financed

Activities

1.3.4 Guiding rule and technical criteria for appraisal technology

(1) General Rule, Guiding rule for EIA Techonology HJ/T2.1-93

(2) Air Environment, Guiding rule for EIA Techonology HJ/T2.2-93

(3) Surface Water Environment, Guiding rule for EIA

Techonology HJ/T2.3-93

(4) Sound Environment, Guiding rule for EIA Techonology HJ/T2.4-

1995

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1.3.5 Data for Engineering Design

(1) Technical Plan for Transformation Project of Energy Saving for

Yangguang Power Generation Company Ltd. ShanxiYangguang Power

Generation Company Ltd. Shanxi, July, 2007.

(2) Related technical data provided by the construction unit, AugustOctober,

2007.

1.4 Identification of key environment issues and the factors of environment impact

1.4.1 Identification of key environment issues Idintification of key environment issues of the project has been made according

to the characteristic of the project and combining with the environmental characteristic of the local area. The results are shown in Table 1.4-1.

Table 1.4-1 Results of indentification of key environment issues

Period Pollution type Project Environmental issue

The transformation project of frequency conversion of primary fan from No.1 boiler,

Production of small amount of dust during the process of the construction of frequency conversion control room

Online Monitoring Equipment Project for coal powder pipe on No.4 boiler

Production of small amount of soot produced from welding during the process of equipment installation

Transformation project of steam seal for No.4 boiler

Production of a small amount of soot produced from welding during the process of transformation

Waste gas

Software development project of inverse balancing for coal consumption calculation of the whole plant

Production of a small amount of soot produced from welding during the process of equipment installation


Production of a small amount of waste water from the construction process of 4 frequency conversion control rooms.


No

Imple- mentation

period

Waste water

Transformation project of steam seal for No.4 boiler No

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No


Production of 60 70dB(A) noise during the process of construction of frequency conversion control room


Production of 50 60dB(A) noise during the transformation process


Production of 60 70dB(A) noise during the transformation process

Noise


Production of 50 60dB(A) noise during the measurement equipment installation


Production of a small amount of construction waste during the construction of frequency conversion control room


No


78 waste steam seal rings from the replacement of steam seal in transformation

Solid waste


No

Waste gas

4 Sub-projects No

Waste water

4 Sub-projects No


Production of 50 60dB(A) noise from axial flow fan functioning for cooling in frequency conversion


No

Operation period

Noise


Noise from vibration of steam seal

8





No.

Solid waste

4 Sub-projects No.

1.4.2 The indentification and selection of factors affecting environment The matrix method has been used to identify and select the factors affecting the

environment of the project according to the characteristic of project and the identification results of key environment issue, the results can ben seen in Table 1.4-2

Table 1.4-2 The indentification and selection of factors affecting environment

Implimentation period Operation period

Project

Environ- Mental factors



Transformation

project of steam seal for No.4 boiler

Software development project of inverse balancing for coal

consumption

calculation of the whole plant




Software development

project of inverse

balancing for coal

consumption calculation of

the whole plant

Environ

ment air -1S -1S -1S -1S +1L +1L +1L +1L

Surface

water

Natural

physical

environ

ment Sound

environ

ment

-1S -1S -1S -1S

Agro-

crops +1L +1L +1L +1L

Natural

ecologic

al

environ

ment

Plants

on

ground

+1L +1L +1L +1L

Enterpris

e’s profit +1L +1L +1L +1L

Social

environ

ment Public

health +1L +1L +1L +1L

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Newly

added

land

N N N N N N N N

Resettle

ment N N N N N N N N

Note “ ”means positive impact “ ” means negative impact “N” means no impact. “1” minor impact “2” medium impact “3” major impact. “S” short-term impact “L” long-term impact.

1.5 Appraisal focus

According to the engineering characteristic of the transformation project of energy saving and combining the environment issues with the indentification and selection result of the factors affecting environment, the appraisal focus of the project is to make a quantitive analysis for the energy saving index after the transformation project, the improvement of local environmental quality from the reduction of pollutant emission and the positive benefit from energy saving and emission reduction.

1.6 Appraisal grade

The side impact caused from the transformation project of energy saving to the environment is very limited, and it will bring certain function of improvement to local environment after the completion of transformation project since the project will bring agood impact of energy saving and emission reduction for the plant.

According to the principle of classification of OP4.01 EIA of World Bank, this project belongs to a project only concerning refitting, maintenance and upgrading. It is not necessary to process a full-scale environment impact appraisal, but still necessary to process environmental analysis. Therefore, this project belongs to B category of environment.

1.7 Appraisal criteria

According to the requirement of zone planning for environmental function of the appraisal area, the criteris for the appraisal of the project are:

1.7.1 Criteria for environmental quality (1) Criteria for environmental air quality: the area the project is located is the

mixture area of rural and general industrial zones, the environmental air quality function zone planning belongs to second zone, where the second grade of

Standards of environmental aie quality GB3095-1996 should be carried out.

The standard limits are shown in Table 1.7-1.

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Table 1.7-1 Concentration limited values for environmental air quality

standard mg/m3

Pollutants TSP SO2 NO2 PM10 Annual average 0.20 0.06 0.08 0.10 Daily average 0.30 0.15 0.12 0.15 1 houraverage — 0.50 0.24 —

(2) Surface water: The surface water system located near the project belongs to Nanchuan River which belongs to Ziyahe water system of Hai River drainage basin and the surface water appraisal should use IV category standard from

GB3838 2002 of Standard for surface wter environmental quality and the

standard limited values are shown in Table 1.7-2.

Table 1.7-2 Standard limited values of surface water environmental

quality mg/L

Pollutant pH Ammonia-

nitrogen CODCr BOD5

Volatile

phenol

Standard

value 6 9 1.5 30 6 0.01

Pollutant Cyanide Fluoride Sulfide Oil

Standard

value 0.2 1.5 0.5 0.5

Note pH dimensionless (3) Underground water: Local people living in this area use the underground

water for drinking. According to the underground water classification requirement of

Standard for underground water quality GB/T14848-93 and the underground

waer defined as category III based on “the basic value of people healthcare, mainly used for water source for collective living and drinking and agriculture”, the quality of underground water in the appraisal zone is defined as category III and applied to

standard of category III from Standard for underground water

quality GB/T14848-93 . The standard limited values are shown in Table 1.7-3.

Table 1.7-3 Standard limited values of underground water environmental

quality mg/L

Project pH value Total rigidity

(CaCO3)Sulfate Fluoride

Total caliform group(N/L)

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Standard value

6.5 8.5 �450 �250 �1.0 �3.0

Project Ammonia-

nitrogen Nitrate Nitrite Cr6

Total bacteria (N/ml)

Standard value

�0.2 �20 �0.02 �0.05 �100

(4) Environment noise: Apply to 2 category standard from Standard for

environmental noise in urban area(GB3096-93), the standard value is listed in

Table 1.7-4.

Table 1.7-4 Standard for environmental noise

Standard value (dB(A)) Category

Day Night 2 60 50

1.7.2 Standard for Pollutant Emission

� Implementation period The noise at construction site applies to the requirement of limited values for

construction site from Noise limited value for construction site(GB12523-90)

and the standard values are shown in Table 1.7-5.

Table 1.7-5 Limited value for noise from construction site

Limited value of noise

(dB(A)) Implementation

period Main noise source

Day Night

Structure Tamper, electronic saw etc. 70 55

Decoration Crane and lift 65 55

�Implementation period

�Standard for air pollutant emission According to the requirements of Shanxi Provincial Environmental Protection

Bureau to the Approval of EIA on desulfurization project of Yangguang Power Plant, the desulfurizaation project before the transformation should carry out the highest allowable emission concentration for the phase I of coal-burning boiler regulated in

Standard for air pollutant emission for thermal power plantGB13223-

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2003 and after the transformation it should follow the highest allowable emission

concentration for the phase III of the standard. The standard values are shown in Table 1.7-6.

Table 1.7-6 Standard for air pollutant emission for thermal power plant

Boiler type

Pollutants Highest allowable emission concentration of Phase I mg/m3

Highest allowable emission concentration of Phase

III mg/m3

Soot 600 50 SO2 2100 400

Coal burning boiler NOX 1500 —

Note Vdaf 10%

� Standrd for waste water emission

Waste water emission should carry out the first grade standard from Table 4 of

Standard for waste water emission GB8978 1996 . The standard values are

shown in Table 1.7-7.

Table 1.7-7 Standard for waste water emission

Pollutant Standard

value Pollutant

Standard value

Pollutant Standard

value PH 6 9 Oil 5 CODCr 100

Suspended solid

70 Fluoride 10

� Standard for noise emission

The standard for noise emission in the west, south and east boundary of the plant

should carry out the standard of Category II from Standard for noise from industrial

plant boundary GB12348 90 and the north boundary the standard of Category

IV from GB12348 – 90. The standard limited values are shown in Table 1.7-8.

Table .7-8 Noise standard for industrial plant boundary

Standard value B(A)) Category

Day Night

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� 60 50� 70 55

�Standard for solid waste storage

The treatment of solid waste should carry “the Control standard of the storage of general industrial solid waste and treatment of site pollution” (GB18599 – 2001).

1.8 Environmental sensitive area and protection target.

Table 1.8-1 shows the environmental protection targets and sensitive area around the power plant.

Table 1.8-1 Environmental protection targets

Environmental factors

Environmental sensitive area

and protection targets

Characteristic of area

Direction Distance

(km)

Xiaonanao Village village E 0.26 Guanzhuan Village village W 1.44

Changjiaguo Village E 1.18 Atmosphere

Nanao Village village N 0.81

water Nanchuan River Category IV N 0.15

Noise Xiaonano Village village E 0.26

1.9 Security and ensure policy of World Bank

According to the relative regulations of World Bank, it is necessary to pay special attention to public benefit during the process of project implementation and it is also the goal EIA is being carried out by the appraisal unit. Therefore, the unit in charge of the appraisal has verified and confirmed the policies of World Bank on security and ensure one by one according to the related regulations. The results are shown in Table 1.9-1.

Table 1.9-1 The filtration of security and ensure policies

Series No.

Content for checking

Confirmation result

1EIA

OP/BP4.01EIA is under processing

2Natural habitated

land The transformation of energy saving is implemented in

the existing area of the plant which is located near the

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OP/BP4.04 county seat of Pingding, Yangquan City, Shanxi Province, not concerning with natural habitated land.

3Management of

pests OP4.09

The project has not involved in management of pests.

4Material cultural

heratige OP/BP4.11

The project is implemented in the plant to make transformation on energy saving. Through the field survey by the unit in charge of EIA, confirmation is made that there is no any material and cultural heratiges in this project.

5Non-volunteer resettlement OP/BP4.12

The project has not involved in the issue of resettlement.

6Minority

OP/BP4.11

The area of the project is the place of assembling for Han nationality and not involving with the issue of

minority.

7Forest

OP/BP4.36No natural forest or artificial forest located near the

project.

8Dam security OP/BP4.37

No large scale dam near the project.

9Region of disputation OP/BP7.60

No international region of disputation at the project area.

10 International river

OP/BP7.50The project has not involved in international rivers.

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2 Summary of project and engineering analysis

2.1 Summary of the existing project

2.1.1 Geographical location

Located in the boundary of Pingding County, Yangquan City, Shanxi Province, Yangguang Power Plant is 15km away from Yangquan City and 4km to county seat of Pingding County. The topography where the plant is located is widen, in the opposite bank with Nanao Xiang acrossing Nanchuan River and Yang-She Railway Line connecting with Shijiazhuan-Taiyuan Railway is passing through the east of the plant area. Special railway line of Yangquan No.5 Coalmine Bureau passing through the north of the plant connects with Yang-She Railway Line at Pingding. Yang-Xi highway passes through in the east side of the plant while Shijiazhuan-Taiyuan Expressway passes in the north of the plant, providing a good access of transportation. Yangpoguo ash field of the plant is a wet ash field locating at about 7km to the east of the plant. The slag yard of the power plant is No.3 gouge in the south of the plant. The geographical locations of the plant site, ash field and slag yard can be found in the Figure 2.1-1.

2.1.2 Summary of project

The total installed capacity of Yangguang Power Generation Company Ltd. is 4×300MW condensing coal-burning steam turbine and a boilter total evaporating capacity of 4100t/h. Began to prepare the construction in 1984 and the construction was begun on December 1993 and 4 generator groups began to put into operation on November 27, 1999. No. 1, 2, 3 and 4 boilers share a steel bar concrete stack with a mouth diameter of 8m and a height of 240m.

According to the requirements of State Environmental Protection Bureau, People’s Government of Shanxi Province and Municipal Government of Yangquan City, Yangguang Power Plant has conducted the transformation of disulfurization to 4 generator groups using Limestone-Gypsum Wet Method Desulfurization Technology and the desulfurization efficiency is 90% and transformed the former electrostatic precipitators. At present, the desulfurization project of 4 generator groups have already completed and put into operation. On December, 2006, the electrostatic precipitators associated with No.2 and 4 boilers have been transformed into Bag filters and the precipitator rate has been increased from former 99% to 99.9% while the control system of electrostatic precipitators of No.1 and 3 boilers have been upgraded and transformed.

16




Figure 2.1-1 Geographical locations of plant site, ash field and slag yard of Yangguang Power Plant

N

6ODJ

3ODQW

$VK

17




Ash moving system utilizes high concentrated hydraulic transportation with a ratio of 1: 4 for ash and water, being transported to Yangpoguo Ash Field through two steps of ash mortar pumps. To realize an integrated utilization of power coal ash, the dry ash intake systems had been added to No.2, 3 and 4 boilers from 2005 to 2006 and the slag is transported by truck to slag yard for storage.

The key facilities and environmental protection equipment of Yangguang Power Plant are shown in Table 2.1-1.

Table 2.1-1 A table of summary of key facilities and environmental protection

equipment of Yangguang Power Plant

Project Unit 1# 2# 3# 4#

Contribution MW 300 300 300 300 Contribution and time to put into operation

Time Each group began to put into operation from

December 1996 to November 1999 every year.

Model

DG1025/18.2-II“W”blaze,

positive pressure direct

blowing, subcritical, one

mediate reheat, natural

circulation boilers.

B&WB-1025/18.3M“W”

blaze, intermediate bunker,

subcritical, one mediate

reheat, natural circulation

steam boilers.

Boiler

Vaporization volume

t/h 1025 1025 1025 1025

Model N300-16.7/537/537-4

Variety Subcritical, single shaft double cylinders, two

condensers, one mediate reheat section condenser Steam turbine

Contribution MW 300 300 300 300 Model QFSN-300-2-20

Cooling mode

Water—hydrogen—hydrogen Generator

Capacity MW 300 300 300 300 Varitey Limestone-Gypsum Wet Method Desulfurization

Desulfurization equipment

Desulfurization rate

% 90

Variety

Double chamber 4

electronic fields

electrostatic

precipitater

(Control system

has been upgraded

and reformed

Bag filter

Double chamber 4

electronic fields

electrostatic

precipitater

(Control system has

been upgraded and

reformed

Bag filter

Precipitators

Dust catching rate

% 99.0 99.9 99.0 99.9Flue

gas

trea

tmen

tequ

ipm

ent

Stack Series No. 1# 2#

18




Mode Reinforced concrete

structure Reinforced concrete

structure Height m 240 240 Mouth

diameter m 8 8

Variety Adopting natural ventilation cooling tower Coolind mode Cooling

space m3 4500 4500 4500 4500

Waste water from

production

Waste water after treatment of waster water treatment

station recycles back to coal transportation system,

spraying in coal field or supplies to ash washing system

Domestic sewage

After 2-grade bio-chemical treatment it will supply into

ash washing system

Way of waste water treatment

Ash water After clarification of silo, it will be emitted out

Powder coal ash

High concentration water ash emission will put into ash

field or be used together with coal powder for

comprehensive usage. Way of slad treatment

Slag Slag will be transported by trucks to slag yard or

comprehensive usage.

2.1.3 Layout of plant area

In the plant area, 220kv indoor distribution device, natural ventilization cooling tower, major workshop, railway line and coal field are allocated from south to north. The indoor distribution device is located at the terrace in the farmost south of the plant area, linking with the power line outside the plant at the south. The dateiled layout is shown in Figure 2.1-2.

2.1.4 Coal consumption and water consumption

(1) Coal consumption The coal used by the plant is supplied by local coalmiles under the administration

of Yangquan No. 5 Coalmine and Pingding County among which all the coal supplied by Yangquan No.5 Coalmine is transported into the plant through railway and those by Pingding local coalmine is transported by truck, entering from the east side of the plant.

Anthracite quality burned by Yangguang Power Plant in 2005-2006 is: sulfur 0.68-1.8%, ash content 18075-45.02%, the average quality of coal is shown in Table 2.1-2. The total coal burning volume is 3.8358 million t/a.

19




Table 2.1-2 Analysis of average coal quality in 2005-2006

Project Symbol Unit Numerical value Applied base moisture Mt % 9.6 Received base ash content Aar % 30.24 Dried base volatile Vdaf % 7.5 Received base carbon Car % 59.12 Received base sulfur St,ar % 1.66 Received base hydrogen Har % 2.39 Received base nitrogen Nar % 0.86 Received base oxygen Oar % 3.47 Reived base low calorific value Qnet.ar kJ/kg 22180

(2) Water consumption The water needed for the project is supplied by Water Pumping Project from Nianziguang to Pingding with a fresh water volume of 3092m3/h. Table 2.1-3 shows the water consumption situation of the plant and Figure 2.1-3 shows water balancing of the power plant.

20




1

23

4

5

6

7 8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30 31 32

33

No Name No Name No Name1 Turbinehouse 12 In house220kv power

distribution facility23 Hydrogen generation

station2 Deoxygenating

house13 Natural shaft cooling

tower24 Officebuilding

3 Coal bunker 14 Signal tower 25 Communicationbuilding

4 Boiler house 15 Underground bridgeandtruck dischargeditch

26 Open oil storage

5 Precipitators 16 Coal yard 27 Dinning hall6 Wind-blower

house17 Coal transport building 28 Single resident building

7 Flue channel 18 Ash pumpshouse 29 Shelter storage8 Chimney 19 Fuel tanks 30 Material warehouse9 Boiler imitation

house20 Acid and base storage 31 Coal dozer house

10 Central controlbuilding

21 Chemical water treatmenthouse

32 Wastewater treatmentplant

11 Transformers 22 Air compressor house 33 Coal Handling Gallery34 Desulfuration tower

34

Locations of transformation projects on energy saving

Symbol Transformation Project

Transformation of frequency conversion for primary fan on No.1 boiler

Transformation of steam seal on No.4 generator group

� Installation of onlinemonitoring on coal ash pipe lineof No. 4 boiler

21




Figure 2.1-2 Layout of Plant Area

22


Table 2.1-3 Situation of water using by power plant

Variety of water source

Purpose Unit Volume of circulation

water

Volume of supplied fresh

water Cooling water 74000 1579 Supplied water

for boiler 194

Industrial water

m3/h

1303

Ground water

Domestic water m3/h 16 Total m3/h 74000 3092

Cooling towerCirculation water

74000

Circulation Water

Water for chemical treatment

Water source

Water recovery pool

Neutralization pool

Evaporation loss

Ash flushing pool

3092

15791036

1303

194112

82

16

38

13

6203

79

1

Desulfuration system

268

298

1005Water for

industrial use

Industrial Wastewater Treatment Plant

288

20

235

Coal transport system, coal yard spray

20

Ash Yard

Wastewater discharge 543

Boiler refill

Water for domestic use

Biochemical Treatment

Watering plants or

street spray 4loss

Figure 2.1-3 Water balancing chart of plant

Waste water produced from the plant and domestic waste water from the plant area enter the two systems for production waste water treatment and domestic waster treatment separately and after the treatment they are sent back to use in coal transportation system, spraying in coal field and water for ash pouring, the drainage outside ash field is used to emit the water into Nangchuan River.

2.1.5 Situation of pollutant emission

(1) Waste gas

� Concentration of emission

The Testing Center of Taiyuan University of Technology conducted monitorings

Table2.1-4 for flue gas from boiler in power plant on July 2004 and April 2005

respectively. The result shows that the concentrations of soot and NOx emission from 4 boilers all meet the requirements of the I Period of “the Standard of Air Pullutant Emission of Thermal Power Plant”(GB13223-2003). Since the power plant had not

23


realized desulfurization project when monitoring, the concentration of SO2 emission from flue gas of boiler exceeds the standard at that time.

In 2006, after the completion of transformation of bag filters associated with No2 and 3 boilers, Haarbin University of Technology, Sciene and Technology for Environment Protection Company Ltd., conducted a test to the capacity of the equipment and the result was: the soot concentration in the flue gas at the exit of the bag filters was 18.75mg/m3 after the transformation; the soot concentration in the flue gas at the exit of the electrostatic precipitator of No.1 and 3 boilers after the transformation was 35.0mg/m3: . Afte the full operation of desulfurization equipment, the desulfurization rate of soot from boilers was 90%.

After the transformation of desulfurization and precipitators, the soot and S02 emissions of No. 1 and 4 blioers meet the requirements of III time period standard from “the standard of pollutant emissions from thermal power plant” (GB13223-2003). From the bellow Table 2.1-4, we can find the concentration of pollutants before the transformation of desulfurizationa and precipitators and the conditions of meeting the standard.

Table 2.1-4 Flue gas and pollutant emission situation from boiler unit:mg/m3

Pollutant 1# 2# 3# 4# Emission concentration 358.4 414.6 234.2 276.6

Emission standard 600 600 600 600 Soot

Meeting standard or not

Meeting standard

Meeting standard

Meeting standard

Meeting standard

Emission concentration 3345 3167 3147 2642

Emission standard 2100 2100 2100 2100 SO2


Exceeding standard

Exceeding standard

Exceeding standard

Exceeding standard

Emission concentration —— —— 1344.80 1109.97

Emission standard 1500 1500 1500 1500

Bef

ore

tran

sfor

mat

ion

ofdu

stca

tchi

ngan

dde

sulf

uriz

atio

n

NOx

Meeting standard or not —— ——

Meeting standard

Meeting standard

Emission concentration 18.75 35.0 18.75 35.0

Emission standard 50 50 50 50 Soot


Meeting standard

Meeting standard

Meeting standard

Meeting standard

Emission concentration 334.5 316.7 314.7 264.2

Aft

ertr

ansf

orm

atio

nof

dust

catc

hing

and

desu

lfur

izat

ion

SO2

Emission standard 400 400 400 400

24



Meeting standard

Meeting standard

Meeting standard

Meeting standard

Note No monitoring is conducted to NOx from 1#2# boilers.

� Emission volume According to the statistic report of environment of Yangguang Power Plant in

2006, the pollutant emission of the plant was : SO2 36668t/a; soot 6060t/a; the total SO2 volume index assigned by Yangquan Environmental Protection Bureau was 52530 t/a, meeting the requirement of the total volume index. After the completion of transformation of desulfurization and precipitators, the total volume index of SO2 designated by Yangquan Environmental Protection Bureau was 6500 t/a.

(2) Waste water The waste water emitted to outside in the Thermal Power Plant is only the waste

water emission in ash field. Table 2.1-5 shows the results of monitoring conducted by Shanxi Electronic Science Research Institute on waste water emission emitted to outside of ash field meeting the requirements of the Grade One standard from “Standards of Conprehensive Emission of Waste Water” (GB8978-1996), and emitting into Nanchuan River from the sewage of ash field.

Table 2.1-5 Ash water quality emitted outside the ash field (unit:mg/L except

pH)

Project pH Suspended

solid Fluoride CODCr oil

Ash water quality

7.84 11.4 1.47 25.3 Not found

Standard value

6~9 70 10 100 10

(3) Solid waste

The major solid wastes are coal powder and slag. The production of coal powder is about 962,000 t/a, the production of slad is 118,000 t/a. The coal powder uses high concentration water power ash washing system and transported to Yangpogou ash field through two steps ash mortar pump systems. To implemente a comprehensive utilization of coal powder, the dry ash conveying systems were added to No.2, 3 and 4 boliers in 2005-2006 and it is estimated that in 2007 the comprehensive utilization volume of coal powder will reach 240,000 tons with a utilization rate of 24.5%. The waste slad is transported by trucks to the consumers of comprehensive utilization or to store them in No.3 slag yard located in the south of the plant.

2.1.6 The existing issues and the measures taken

25


As an old plant put into operation from 1996-1999 successively, Yangguang Power Plant has carried out the transformation and improved the impmentation of prevention and control on pollution continuously according to the more and more strick control on the environmental protection during its development, such as: the transformation of precipitators, the transformation of desulfurization, transformation of dry ash conveying system and wind-proof wall in coal field, greatly reducing the emission volume of pollutants and making a great contribution to the local environment.

After a series of transformation measures, the measures which can still be further improved for the pollution protection and control are as follows:

Desulfurization of flue gas: the boilers the power plant are using are “W”

type blaze with a high temperature in furnace chamber and large emission of NOX. Though this emission is in accordance with the standard of “Air Pollutants Emission” (GB13223-2003) Time period of I, the power plant should still carry out further measures to reduce the emission of NOX for the improvement of local environment.

Solution: The power plant should set up an independent project bureau on denitrogenation environmental protection and equipped with special personnel to be in charge of the data collection of data and preliminary study for this work.

To further increase the conprehensive utilization rate of coal powder

At present, there is still a great volume of coal powder and stag which have not been utilized completely.

Solution: To increase the comprehensive utilization rate of coal powder, the measures the plant is going to carry out include: installation of day ash catching system to No. 1 boiler, construction of the production line of gas-adding concrete block, further development of market for coal powder to raise the comprehensive utilization rate of coal powder to more than 75%.

2.2 Analysis to engineering of transformation project on energy

saving

2.2.1 Situation of energy consumption of Yangguang Power Plant The annual energy consumption of Yangguang Power Plant is about 2.9 million

tons, the level of coal comsumption for power supply is about 348g/kwh level, the annual fresh water volume is about 20 million tons and energy consumed by the plant itself is about 300 to 400 million digrees.

In recent years, the energy saving project has been listed as the first option for the technical transformation project and realized many energy saving projects as the transformation of frequency conversion and the transformation of air preheaters. The energy consumption of each generator group is reducing year by year, the detailed index can be found in Table 2.2-1.

26


Table 2.2-1 Situation of energy consumption of Yangguang Power Plant

Time Project

2003 2004 2005 2006

Power generated 10

thousand kwh793618 843168 820668 822988

Coal consumption for

power supply g/kwh

350 349 349 348

Power utilization rate of plant g/kwh

5.42 5.11 4.92 5.05

Note In 2006, because of putting into operation of bag filters in No.2 and 4 boilers, the power consumption of that year increased a little.

2.2.2 Summary of transformation project on energy saving The transformation project on energy saving of Yangguang Power Plant includes

four sub-projects. See Table 2.2-2 for details.

Table 2.2-2 Summary of transformation projects on energy saving in Yangguang

Power Plant

Project name Transform

ation content Result of energy

saving Planned

time to realize

Investment

10 thousand

yuan

The

transformation

project of

frequency

conversion of

primary fan from

No.1 boiler,

Installation

of frequency

conversion

equipment to 2

sets of primary

fan

Saving standard coal 1560 t/y, reduction of power consumption for 0.045%, reduction of coal sumption of the whole plant for 0195g/kwh

During minor

maintenance of

No.1 boiler on

Nov. 2008

442


Installation

of online

monitoring

system on coal

as pipe line

Saving standard coal

of 7200t/y, coal

consumption/ group

reducing 3.60g/kwh

During major

maintenance of No.

4 bilor on June

2008

500


Replacing

of steam seals

Reduction of coal

consumption /generator

group off 3.00g/kwh

annually

During major

maintenance of

No.4 group on

June, 2008

120

27



Software

development

Annual consumption

of 4000t standard coal.

Reducing coal

consumption of

0.50g/kwh

During major

and minor

maintenance of

No.1. 2. 3 and 4

boilors on Jan.

2008.

360

Total — 18760 — 1422

2.2.3 Transformation project of primay fan on frequency conversion

in No. 1 Boilor

2.2.3.1 Analysis to the necessity of frequency conversion

transformation There are 4 sets of FWEC D-100 double entering and double going out coal grinding machine positive pressure blowing powder manufacturing system for No. 1 boiler in Yangguang Power Plant: and also equipped with 2 sets of G9-36-1NO171 centrifugal primary fan (each with a rate of 1400KW). At present, the system adjusts the pressure of major pipe of coal and hot wind through the adjusting of baffle at the intake of primary fan, and through the adjusting of load baffle of coal glinding machine to change the contribution power of coal grinding machine. The adjust faffle at the intake of primary fan and load faffle in coal grinding machine have the loss of throttle with relative large amount, resulting in the loss of energy consumption. If changing primary fan into frequency conversion control, theough the adjustment of the rotate speed of the fan, the direct of coal powder production for coal grinding machine can be realized and the loss of throttle can be reduced as well as the reduction of energy consumption be realized.

2.2.3.2 Analysis to designed index of operation of primary fan

Index of primary fan of No. 1 boiler is shown in Table2.2-3

Table 2.2-3 Index of primary fan

Operation point Project

TB B-MCR

Wind volume(10 thousand m3/s) 21.74 16.7 Intake temperature(�) 25 25 Intake density (mg/m3) 1.3 1.3

Average air pressure (mmHg) 697.9 —Total pressure (Pa) 15242 10464

Ratio pressure energy (Nm/kg) 5349.2 3855 Rotete speed of shaft of

ventilation machine(R/min) 1490 —

Input power of driving machine 1143 788

28


(KW) Recommended rating power of

driving machine(KW) 1400 —

Motor current (A) 157.7 —

From the above mentioned analysis, we can learn:

�During the normal operation of primary fan of No. 1 boiler, baffle opening

condition is about 50-60%, with a great loss of throttle, providing the possibility of transformation of frequency conversion in the field of economy.

�Since the primary fan is operating generally on a set pressure, the primary pressure during the operation is keeping on about 11kPa. After the transformation of frequency conversion, the primary pressure can be reduced into about 9kPa to let the fan realize a specific adjustment to rotate speed.

Therefore, primary fan of No. 1 boiler has the possibility for the transformation of frequency conversion.

�Specific experiment for primary fan on cooling condition On September 2004, during the minor maintenance period of No. 1 boiler, an

experiment was conducted to the operation points on primary fan to associate with the transformation project of frequency conversion on fan for the power plant and to provide base information for the transformation. From the experiment of cooling condition of fan, there is still a large margin for the design of fan. During the experiment, an experiment was conducted to the seal condition of coal grinding machine, when the load baffle was opened to wider than 80%, the pressurized wind pressure could meet the demand.

Therefore, the primary fan on No. 1 Boiler has the possibility for the transformation of frequency conversion.

2.2.3.3 The implementation plan of frequency conversion and

engineering contents.

�Determination of the plan Based on the issues raised through the overall analysis to the primary wind

system and the major and supplementaly machine systems, the final determination of the transformation plan for frequency conversion is: the control plan of one pulling one/ automatic transversion between power frequency and frequency conversion according to the principle of “ensuring the safe and reliable system, reasonable constructure, simple operation and small amount in transformation.

Since there is no standby operation mode and the primary fan system is working with two sets and one fan can only supply 60% load for the group. Under the situation of high load of fan group, the trip of each fan can cause safety problem to the operation of the group though RB system of the group can realize automatic adjustment and reduction of load for major and supplementary system when trip occurs to realize the stable transversion and continuous operation. However, using the

29


automatic transversion plan between power frequency and frequency conversion is to ensure the transition the process of the fan group from frequency conversion to power frequency and the safe operation of the unit.

�Engineering content of transformation The contents of transformation of frequency conversion include: construction of

a frequency conversion control room with 40m2, installation of frequency conversion equipment and transformation of the circuit of fans, the location points of the transformation is shown in Table 2.2-1.

The detailed principle chart of electronic structure of the system is shown in Figure 2.2-2, among which, QF means high pressure switch; QES means the grounding point of high pressure switch; TF means transducer; M means motor. The system is adding QF13 and QF23 high pressure switches at both sides of 6kv major lines to replace QF11 and QF21 to realize the power frequency operation function on the base of existing primary fan, and adding QF12 and QF22 at both sides of transducer to realize the isolation of electricity and gas furing the operation of primary fan.

Figure 2.2-1 The place to conduct the transformation of frequency conversion on

primary fan of No. 1 boiler.

Primary fan Location to set up control room for frequency conversion

30


Figure 2.2-2 Principle chart for major electronic structure of frequency conversion system

To realize the automatic transversion between power frequency and frequency conversion, the system utilizes vacuum breaker as the functioning part for operation which has advantages of high realibility, low malfunction rate, short time in switching onand off and complete protection function. At the same time, an overall design to the control logic of high pressure switch is done to raise the high security and realiability for the system, main including the following aspects:

The transformation has been done to the control circuit of the switching on and off

function of high pressure switch on the upper part of transducer to realize the combined protection function with transducer. When the transducer has not under the condition of supplying power, the high pressure switch allows the loop to prevent malfunction of power supplying; when the major accidents occur on transducer, the emergy switch will shut down the high pressure switch to cut off the power source of 6kv to protect the safety of the system.

Realization of the combinated function to high pressure switch at the lower part of

transducer. When the switch at the lower part of transducer is in the condition of disconnection, the starting of transducer will be prohibited; when the primary fan frequency convension is under operation, and any abnormal disconnection happens at the lower part of the switch, the frequency conversion system will issue the abnormal signal to ensure the primary wind system can response an emergency reaction to the accident.

Through the realtime monitoring and treatment to the working point of the

operation by the combination of upper high pressure and lower high pressure switches of transducer and the judgement and analysis of the location of the failure by primary wind system by different grades and points to make a

31


judgement of the actual situation of failure fro 6kv net side, equipment, primary fan and load. Through the comprehensive treatment and analysis, automatic functions of checking and treatment will be realized under the situation of happening any failure. Under the emergency, the system will determine the frequency conversion of primary fan should be switched to power frequency when the frequency conversion shuts down.

Installation of synchronizated power switch system to realize fast switch from

frequency conversion into power frequency operation mode of primary fan after checking out that the failure point is not the problem of the primary fan or motot to gurantee the primary wind system not to lose pressure or switching off the fire.

To avoid the short circuit for power frequency and frequency conversion, two

isoletad and blocked electronic circuits are located at high pressure switch of the lower part of transducer and the high pressure switch of power frequency, realizing a hard connection through the circuit on the one hand and a soft connection through the primary wind system logic on the other hand to function as two different level of protection.

The groundings located in lower part high pressure switch and power frequency

high pressure switch of transducer have mutually locked function to prevent the occurance of malfunction when the machine is under operation or under maintenance and avoid the happening of serious accidents. When one side is under operation, the system will lock the other side grounding to prohibite the gounding action at other other; when one side is switching into grounding function, the operation of primary will be prohibited.

Realization of automatically transversion between power frequency and frequency

conversion freely according to the need of the operation to ensure the retreat of transducer under the situation of failure and re-connection stably under the situation becomes normal.

The control and logic treatment circuit of the system switch and transducers are all

under control by automatic control system of frequency conversion.

2.2.3.4 Newly adding equipment and demand of technical index for frequency

conversion transformation

�The new equipment needed to add for the transformation of primay fan

The list of the equipment needed to added is shown in Table 2.2-4

Table 2.2-4 List of newly added equipment for transformation of frequency conversion for primary fan

Series Name Amount set

32


No. 1 High pressure transducer 2 2 High pressure switch box 4 3 Heat exchanger 2 4 Axil flow fan 380VAC 2 5 Sychronized power switching equipment 2

�Required technical index of transducer

The detailed technical index is shown in Table 2.2-5

Table 2.2-5 The technical index of transducer

Series

No. Name Index

1 Transducer capacity (KVA) 1400

2 Qualified motor rate (KW) 1400

3 Input frequency (Hz) 45 55

4 Rating input voltage (V) 6000V+5%/-10%

5 Input power factor 0.95 >20% load

6 Tranducer efficiency Under rating load >0.96

7 Out frequency range (Hz) 050

8 Output frequency resolution (Hz) 0.01

9 Over loading capacity 120% per minute 150% protect

immediately

10 Simulated input 0 10V/4 20mA design as one wish

11 Simulated output 2 lines, 010V/4 20mA selectable

12 Time to accelerate and reduce(s) 0.13000

13 Environment temperature under

operation �0 40

14 Temperature on storage/transportation� -40 70

15 Environmental humidity <90%, no coagulation

16 Grade of protection IP20

2.2.3.5 Analysis to result of transformation of frequency conversion

According to the analysis and calculation, two sets of primary fan of No. 1 boiler consumes power of about 12 million degrees annually and after the transformation of frequency conversion, the energy saving result at more than 30%, then it is estimated the whole plant can save 3.6 million degrees of power annually and reduce the power consumption of 0.045% (calculated as the whole power generated is 8 billion

33


degrees), the plant can decrease the coal consumption of 0.195g/kwh, save 1560 tons of standard coal annually, if calculated as 300yuan per ton, the plant can have a benefit of 468,000 yuan annually.

34


2.2.4 Installation project of online monitoring on coal powder pipe of No. 4

Boiler.

2.2.4.1Analysis to the necessity of installation of online monitoring system During the operation of thermal power plant, the coal powder density within the powder piping system of boiler combustion system, i.e. primary wind coal density is the important factor. The high and low of coal density directly influences the equality of powder transmitted in the pipe, the stability of working point in the chamber and the effeiciency of combustion in the boiler chamber. At present, there is no online monitoring system equipped on pipe of coal transmission, the major issues are the followings:

� There are measuring holes on the pipes of existing system which are used for the measurement of off line wind speed when combustion is operation in the boiler, but it is impossible to realize online measurement to coal density, speed of coal powder flow and the controllers can not have a good control to coal powder index entering into the boiler chamger and it is impossible for them to make an adjustment in time according to the situation.

�There are few intersects between the steam and water systems of the boiler in the plant, resulting in the unequality of coal powder for primary wind under operation which can cause the decline of blaze in the chamber easily and let specific part of heating become overheated and effect the safe operation of boiler.

�Because of the different density of coal powder coming out from the fire mouths with different widths on hearth under the operation of boiler, when the specific part is in high density, the supplied wind is not enough and effect the complete combustion of coal powder; when the specific part is in low density, the stability of consbustion will be effected.

�When the coal powder density in the pipe is too high and the wind speed is too low, the jam in the coal powder transmission pipe will occur even the result of the accidents as firing of coal powder pipe.

Therefore, after the installation of only monitoring system on the pipe and we can measure the equality of coal density of primary wind and the equality of the coal powder transmission, under the coal powder flow and density realtimely, and make fast djustment in time according to the measurement result, we can realize the optimization of combustion, let it more stable, reduce carbon content of ash, more stable hearth temperature and improve the boiler efficency.

2.2.4.2 Analysis to the feasibility of installation of online monitoring system Our focus is the analysis to the influence of the equality of coal powder to

combustion. The boiler of No.4 generator group of the plant is B&WB-1025/18.3M”W” type

blaze, mid-storage, subcritical, primary middle reheating and natural circulation steam turbine produced by Beijing Bawei Boiler Factory. There are 16 burners in it. Because of the different distributions of powder supplying pipes of powder supplyer and

35


primary wind pipes, the different resistances of coal powder pipe occur, which will cause the larger difference to the speed of coal powder pipe and difference in the coal powder volume under transmission, the density and equality of coal powder have much greater diffeence.

During the actual combustion process, the speeds of wind and powder mixed at the mouth of coal powder pipe are changing very rapidly and frequently within a wide range as the changes of combustion and coal quality, and they are influencing the stability of combustion. If we want to maintain the stable of combustion and raise the burning efficience, it is necessary to continuously measure and adjust the density and equality of coal powder. Through the observation to the influence of coal powder equality to the combustion under the manual cooling and heating admustment of the boiler combustion, the result is that under the condition of equal coal powder, the combustion is stable, the negative hearth pressure wave is small, carbon content of ash is low and the whole earth temperature is very equal.

Therefore, the equality of coal powder is very important to the combustion. If we can have a realtime measurement and adjustment to the equality of coal powder according to different load and coals under operation, we can increase the burning efficiency of boiler and realize the energy saving and emission reduction.

2.2.4.3 Implementation plan and project component of installation of online

monitoring system �The determination of the plan Through the analysis mention above, the coal powder density- primary wind coal

powder density within the powder transmission of boiler burning system is a critical factor. Therefore, it is necessary to install online monitoring system on coal powder pipe. The determination of the measurement method for the plan is electric charge induction method from the direct methods.

The operation theory of the method is that: During the process of coal block being grinded in the grinding machine, the process of coal being smashing and the process of being transmitted, the coal powder grain always hits the pipe wall, friction and distribution with the pipe wall always happen, and even among the coal powder grains, the crash, friction and distribution are always happening. Such kind of processes with a great volume and close contact and separation can bring coal powder with curtain amount of static charge. The coal powder grain with static charge can produce curtain amount of static fields. When they are passing through the metal sensors, the surfaces of the sensors can produce the equal amount of inductive charges. When a large amount of coal powder with charge is passing through the sensors, the inductive electric current will be formed on the surface of the sensors. There is a relationship between the volume of inductive electric current and the flow volume of coal powder flow passing through the sensors. Setting inductive electric current as the measurement signal, and through the analysis and treatment of them, we can get the density signal of coal powder. At present, this method has been already put into industrial utilization with a good result.

�Engineering content of transformation

36


The whole online monitoring system is composed of three parts as sensor, on the spot box and central control computer, needing to install 16 sets of measurement equipment in total.

The place of transformation is shown in Figure 2.1-2 and the detailed part to be transformed is shown in Figure 2.2-3.

2.2-3

Figure 2.2-3 The location on coal powder pipe of No.4 boiler where online monitoring system to be installed.

To install the sensors on coal powder pipe, then send the signal colleted through the induction to on the spot box through coaxial cable for the treatment. After the treatment, send the signal through the cable to the central computer. The computer will make analysis and treatment to the received data to calculate the flow speed, flow volume and equality of coal powder passing through in the pipe, and display them on the screen and send them to DCS system of power plant through network for the data optimization for the combustion for the program. The operation theory sketch map of online monitoring system on coal powder pipe is shown in figure 2.2-4.

Coal powder transmission pipes outside the major workshop

The location on coal powder pipe where the online monitoring system to be installed.

37


Powder house

Powder supplier

Primary coal powder pipe

Downloading

Powder pipe Primary

Boiler bellow

sensor sensor

Figure 2.2-4 The operation theory sketch map of online monitoring system on coal

powder pipe

2.2.4.4The equipment needed to newly added and technical index for online

monitoring system on coal powder pipe �New equipment to be added 16 sets of online monitoring system on coal powder pipe. �Technical requirement Detailed technical index is shown in Table 2.2-6 Table 2.2-6 Technical index of online monitoring system on coal powder pipe

Series No. Name Perameter

1Measurement range of coal powder density (kg powder/ kg gas)

0.2 2.0

2m/s Measurement range of speed

(m/s) 5 50

3Measurement precision of coal powder density (kg powder/kg gas)

±0.1

4 Measurement precision of speed (m/s) ±1.0

Amplifi Amplifier

PC

38


5 Working temperature of sensors � �300

6 Power voltage (v) AC220±10%

7 Power consumption (kw) �3

2.2.4.5 Analysis to the result of installation of online monitoring system on coal powder pipe

Installation of online monitoring system on coal powder pipe can realize the continuous measurement of coal density and the speed, through the adjustment and control of primary wind, the coal powder entering each burner can become equal, the wind speed can be reduced, power consumption of fan be decreased, fineness of coal powder be improved, combustion be more completed, stable and the efficiency of machine be increased.

After the transformation, carbon content of ash is �5%; the efficiency rate of boiler increases 1%, which can be converted into the reduction of coal consumption 3.6/kwh per machine, saving 7200 tons of standard coal annually, if calculate as 300 yuan per ton of standard coal, we can have a benefit of 2.16 million yuan each year.

2.2.5 Transformation project of steam seal of No.4 boiler

2.2.5.1 Analysis to the necessity of the transformation of steam seal

At present the issues existing in No.4 group are as follows:

� A large leakage amount in high pressure rear shaft seal and middle pressure rear seal and water leaking into tank is serious.

� The large clearance in low pressure front and rear seals influences the vacuum of condenser, resulting in the frequently dis-qualification of the tightness test of vacuum and affecting the economic and stable operation of the machine.

� The clearance between seals on the top of high and middle pressure cylinders much larger than standard, and the steam seal on top of high and middle pressure cylinders is unadjustable which is one of the major reasons causing the low heat efficiency of cylinder.

� Steam leaking volume in steam seal on two sets of minor machines is the major reason of low vacuum of the major machine.

Therefore, the issues of low efficiency of high and middle pressure cylinders, large consumption of steam and low efficiency of turbine of No.4 steam turbine are needed to be transformed to the steam seal urgently.

2.2.5.2 Analyhsis to feasibility of steam seal transformation

39


� The steam seal used in the end of the shaft of high and middle pressure is the type of labyrinth, and through the utilization of this kind of steam stem turbine group should meet the standard of steam sealing according to the point of theory but there are some problems existing in the actual operation, the most important issue is that it is very difficult to ensure the clearance value of steam seal. If the adjustment of the clearance is too big, it will result in the poor tightness of steam seal, steam leaking in some parts, and reduction of heat economy of the machine and it can also cause the accidents as water entering into oil happening frequently; if the adjustment of the clearance is too small, it is easy to cause the friction between steam seal and shaft surface, and when the friction is serious, it can cause the happening of safety problems as the bending of shafte because of overheated of the shaft surface and vibration problems. Is is calculated that whenever the steam leaking volume of steam seal on the shaft of high pressure cylinder increases 1t/h, the energy consumption will increase 4.8kJ(kw.h).

� The flow clearance between high and middle pressure cylinders is too big. The steam seal on cylinder top has never been replaced since putting into operation and it is still the traditional steam seal of labyrinth type. Because of the factors as invalidation of the spring of press plate for steam seal after using for a lont time, existing of oxide skin and rust dirt in the flow area and the distoration of steam seal, steam seal body, the steam seal can be blocked in the groove and not to concede. To ensure the avoiding of wearness of steam seal after starting, the clearance of steam seal has to be enlarged during the maintenance but this cause the increase of steam leaking between the parts and great reduction of turbine effiency but we have to sacrifice the economic capacity to ensure the security.

�The steam seal of low pressure shaft end uses slanting flat tooth steam seel. To ensure that there is no friction in movement part when starting, the standard for the clearance when installation and adjustment have to use the upper limit one, but this will cause a large volume of steam leaking. The larger clearance between steam seal at low pressure shaft end will cause the leaking of air into condenser, reduction of vacuum. When the 50g/h aire is leaking into condenser, the vacuum of condenser will reduce 1kPa, the heat consumption of the turbine will increase 0.6-0.8%.

To reduce energy consumption, increase the economic capacity and security of the turbine group and solve all the above questions, we are going to implement the transformation to high and middle pressure shaft end steam seal, top steam seal and seals at shafts of two small machines in No.4 turbine through the combination with the successful experience of the plant to the steam seal transformation of No. 2 and 3 turbines.

2.2.5.3 Content of steam seal transformation project

�Content of transformation project

�Transformation of high and medium pressure shaft seal, high and medium

40


steam seal 29 rings at total.

�24 rings of steam seal from front and rear shafts of two small machines transformation.

�Transformation of high and medium pressure top steam seal and low pressure top steam seal 25 rings in total.

The location of transformation is shown in Figure 2.1-2 and the detailed part is shown in Figure 2.2-5.

Figure 2.2-5 Detailed part of steam seal transformation in No.4 boiler

�The advantage of the plan

The contact type steam seal is a kind of steam seal without any clearance, i.e. there is no any clearance between shaft and steam seal to realize the clearance that traditional clearance steam seal (traditional steam seal belongs to clearance steam seal) can not reach and play the better tightness function at the most extent. It has a radial clearance of 0 – 0.05mm between tooth and shaft, not only increasing the tightness of the machine, but also the economic capacity. At the same time, the touched tooth of the steam seal is made of non-metal multi-compound material with the characteristics of anti-friction, anti-high temperature, anti-fatigue, anti chemical erosion and self-lubrication and easily retreatable to avoid the negative situations as rotor damage and causing vibration.

�After the transformation of traditional steam seal tooth into honeycomb airproof tooth, the steam will go along rotating shaft and the clearance between steam

High and medium pressure cylinder

Low pressure cylinder

41


seal ring tooth and honeycomb and flow outwards. Since the steam itself has some pressure, when it passes this clearancem, it will squeeze out into honeycomb holes, and each of the honeycomb holes is forming into a steam room, then the direction of steam pressure will be changed or reduced under the function of these steam rooms. The steam pressure which has already changed the direction will hit the centrifugal steam pressure within this clearance and form into a steam wall which can protect the steam from leaking outside or reduce the leaking amount which reduces the steam seal leaking volume. The honeycomb blade top steam seal greatly solves the problem of the poor effect caused from the traditional blade top tooth steam seal. Except the function of dehumidification, honeycomb steam seal can increase the life cycle of blade, effectively protect self-excited vibration of the machine, and the honeycomb belt is made of Ni-base solid melting and strong alloy material of high temperature to protect the damage of shaft and greatly reduce the clearance which reduces the steam leaking withing the parts and improve the economy capacity in greatest extent.

� After changing the steam seal tooth material into ferrite, it has the advantage of being difficult for becoming hardened, even occurring the friction between activity, its rigidity can still maintain the relatively low value the same as when producing out from the factory, thus it can reduce the possibility of rotor vibration and distortion and increase the security.

2.2.5.4 Technical parameter for Steam seal transformation �The transformation of high and medium pressure cylinder top steam seal is

new type of retreatable blade top steam seal and the radial clearance of blade top is 0.8 – 0.9mm.

�The transformation of low pressure cylinder blade top steam seal is honeycomb type steam seal, its radial clearance at grade 1.4 positive and negative direction is 1.2 – 1.4mm, its redial clearance at grade 5 positive and negative direction is 1.6 – 1.9mm.

� The transformation of low pressure shaft seal is contact type slanting flat tooth steam seal, its radial clearance (looking from the direction of the side of the head of

the machine) between steam seal tooth and shaft is 0.40 0.75mm.

� The transformation of high and medium pressure shaft seal is contact type honeycomb ferrite steam seal, the radial clearance (looking from the side of the machine head) between steam seal tooth and shaft radial, the clearance between steam seal tooth and shaft is 0.40 – 0.75, the one between honeycomb and shaft is 0.55 -0.90.

�The transformation of small crankshaft seal is contact type honeycomb ferrite steam seal, its expansion clearance of steam seal ring is 0.20 – 0.30mm. The radial nect diameter cooperate clearance between steam seal ring and steam packet is 0.15 – 0.25mm. The retreatable value of steam seal ring is 2.5 -3mm. 2.2.5.5 Analysis to the result of steam seal transformation

After the transformation of high and medium pressure blade top steam seal, the flow rate of high and medium pressure cylinder can increase 1%, greatly improving the economic capacity of the machine group.

42


After the transformation, the coal consumption per machine can reduce 3g/kwh, and save 6000 tons of standard coal annually and if it is calculated as each standard coal 300 yuan, we can achieve 1.8 million yuan of benefit each year.

2.2.6 Development project for anti-balance coal consumption calculation software for the whole plant 2.2.6.1 Analysis to the necessity of the softwate development

The coal consumption of the whole plant of Yangguang Power Plant in 2006 was 348g/kWh, which is not too high comparing with the same “W” type turbine unit in the country, but there is still a great difference with the best situation of this kind of unit. As the major task of the power plant has been transferred from the early beginning of operation period for the safety and reliability to the safety and economic capacity, it is very necessary to develop economic evaluation to the operation of the unit.

At present, the power plant utilizes the positive balance calculation for the calculation of coal consumption. Since there is some error of belt balance, the result of coal consumption from the calculation has some degree of error. To exactly reflect the coal consumption of 4 turbine units, the realtime display of anti-balance coal consumption calculation for the units is necessary to control the operation efficiency of the units, to have a good knowledge on the economic operation level of the units for the operation and the management staff to achieve the better purpose of the adjustment of the operation, and the anti-balance coal consumption can realize quantitive analysis to the results of adjustment of the operation and the technical transformation through the calculation of coal consumption. Therefore, it is very necessary for the plant to further develop anti-balance coal consumption software on the existing base of SIS system.

2.2.6.2 Analysis to the feasibility of software development The power plant is using SIS system developed by North China Electric Power University at present, the system includes the functions as: realtime information system for the production process, monitoring system for the performance and system for consumption analysis. According to the response of the statistic data, the coal consumption provided by SIS system through its calculation is greatly different with the coal consumption through statistic.

This is why it is very necessary to develop a set of anti-balance coal consumption software to realize the management of optimization.

2.2.6.3 Project contents for the development of software and implementation

plan �Implementation plan To develop the software of anti-balance coal consumption calculation, we can

take out all the number of switches in DCS system and the simulated signals from SIS system and uses them as the measuring points for the calculation of anti-balance coal consumption and supplies some related measuring equipment.

43


The functions of the software should include: data collection, calculation of capacity, analysis of consumption differences, data statistic, searching for abnomal situation and searching for curve mode, etc. The process flow of the system is shown in Figure 2.2-7.

SIS system

Turbine index

Boiler index

Other index

Online monitoring equipment for flying ash

Online monitoring equipment for coal quality

Quality analysis system of coal entering boiler

Computer system for anti-balance coal consumption calculation

Production report system

Figure2.2-7 Sketch map of process flow of coal consumption

calculation

�Project content The software development of anti-balance coal consumption and supplemental

installation of measuring equipment: 4 sets of ash blowing steam flow meter, 4 set s of steam bag continuous emission flowmeter and 4 sets of online monitoring system for flying ash.

The location of the installation of the measuring equipment is shown in Figure 2.2-2 and the detailed places shown in Figure 2.2-8.

44


Figure 2.2-8 The detailed installation location of measuring equipment 2.2.6.4 Goals for the software development Through the analysis to the index of anti-balance coal consumption, to finally realize the management of optimization. Details are as follows:

�To establish a calculation model for the major function index of the unit based on the design data of the unit.

�To establish anslysis models for all the different consumption results of the operation index based on the design data of the unit.

�Through optimized adjustment experiment, to determine the optimized operation mode and related base parameters for the major and supplementary equipment.

�To realize online capacity monitoring and analysis function of the differences of consumption calculation.

�To realize the optimized operation examining and management function. 2.2.6.5 Analysis to the result of applied software

Through the realime calculation of anti-balnce coal consumption, to monitor the operation and the staff to have a good control on the energy consumption condition of the unit and to make realtime adjustment accordingly. It is estimated that after the operation of the software system, the coal consumption of the plant can reduce 0.05/kwh, and save 4000 tons of standard coal one year, calculating as 300yuan per ton of coal, we can achieve a benefit of 1.2 million yuan one year.

2.2.7 Analysis to pollution emission and solution to pollution protection of the project

The analysis to pollution emission and solution to pollution protection of the project can be shown in Table 2.2-7.

Installation location for steam bag continuous emission

Installation location of online monitoring system for flying

45


Table 2.2-7 Analysis to major pollution discharges and solution of the project

period projectAnalysis to major pollutiondischarge points

Solutions to protect and control thepollution

Transformation of frequencyconversion on primary fan of No.

boiler

During theconstruction offrequency conversion control room,the production of a small amount ofdust, waste water, noiseand solidwaste.

Sinceonly construction for thecontrol roomwith s40m2 structureof brick-mix material withsmall amount of construction volume, production ofdust, wastewater, noiseand construction wastearevery small. To further reduce theconstructionpollution, further management to thematerial will beimplemented to reduceproduction of dust; thewastewater will be re-used for material-mixing; reasonableimplementation method to reduceconstruction noise;small construction wastecan be treated together withdomestic wasteof theplant.

Installation of online monitoringsystem on coal powder pipe of No.4boiler

Production of small amount of sootfrom welding and noise frominstallation processof 16 setsofmonitoring equipment.

Production of soot from welding isvery small, it canbe solve through the improvement of ventilation atthesite; for the noiseproduced from installation sitecan besolved from the selection of reasonableimplementation methos to reduce the noise.

Con

stru

ctio

n pe

riod

Transformation of steam seal ofNo.4 turbine group

Production of some noise during thetransformation processof thereplacement of 78 rings of wastesteam seals in the transformation ofsteam seal.

Thesteam seals taken from the replacement duringthe transformation are mainly the alloy of iron,manganese and chromewhich can be totally sold aswastematerials.

46


Development of software for anti-balancecoal consumptioncalculation for the wholeplant

Production of small amount of sootfrom welding and noise frominstallation processof 16 setsofmonitoring equipment.

Production of soot from welding isvery small, it canbe solve through the improvement of ventilation atthesite; for the noiseproduced from installation sitecan besolved from the selection of reasonableimplementation methos to reduce the noise.

Transformation of frequencyconversion on primary fan of No.

boiler

Production of 50 60dB(A) noisefrom radial flow fan whichfunctionsascooling for transducer

Located in the frequency conversion control roon,radial flow fan with small power produces low noiseduring operation, through noise-isolation function ofcontrol room, the noisecan reduceabout 20dB(A).

Installation of online monitoringsystem on coal powder pipe of No.4boiler

No —

Transformation of steam seal ofNo.4 turbine group

Noise produced from the vibrationof steam seals

Steam seals after the transformation can producenoise of vibration during the operation of the unit,but since the clearance after transformation is verysmall, the noise after the transformation can not bemore higher than before. The plant has already usedthe installation of noise-proof cover for generatorand noise-reducing measure for the workshop.

Ope

ratio

n pe

riod

Development of software for anti-balance coal consumptioncalculation for the whole plant

No. —

46

Environmental Impact Report on Transformation of Energy Saving and Emission Reduction for Shanxi Yangguang Power Generaration Company Ltd.


2.2.7 Result of energy saving and emission reduction of the project

After the completion of the transformation of the project, the plant can save 18760 tons of standard coal annually, achieve a benefit of 5.628 million yuan, the reductions

of production of soot, SO2 NOX and CO2 are 6922t/a 732t/a 170t/a and 49939t/a

respectively; the reductions of emission of soot, SO2 NOX and CO2 are

6.9t/a 73.2t/a 170t/a and 49939t/a respectively; the detailed energy saving and

emission reduction are shown in Table 2.3-8.

Table 2.2-8 The total results of energy saving and emission reduction of the project

Name

Standard coal

to be saved

t/a

Economic benefit

(10 thousand/a

Reduction of pollutant

production t/a

Reduction of

pollutant

emission t/a

Transformation of frequency conversion on primary fan of No. 1 boiler

1560 46.8

Soot 575.9

SO2 60.9

NOX 14.1

CO2 4154.9

Soot 0.6

SO2 6.1

NOX 14.1

CO2 4154.9

Installation of online monitoring system on coal powder pipe of No.4 boiler

7200 216

Soot 2656.7

SO2 280.9

NOX 65.2

CO2 19166.6

Soot 2.6

SO2 28.1

NOX 65.2

CO2 19166.6

Transformation of steam seal of No.4 turbine group

6000 180

Soot 2213.7

SO2 234.1

NOX 54.4

CO2 15970.5

Soot 2.2

SO2 23.4

NOX 54.4

CO2 15970.5

Development of software for anti-balance coal consumption calculation for the whole plant

4000 120

Soot 1475.7

SO2 156.1

NOX 36.3

Soot 1.5

SO2 15.6

NOX 36.3

47



CO2 10647.0 CO2 10647.0

Total 18760 562.8

Soot 6922

SO2 732

NOX 170

CO2 49939

Soot 6.9

SO2 73.2

NOX 170

CO2 49939

Note �The calculation of pollutants is calculated based on the average actual coal

quality and standard coal of Yangguang Power Plant in 2005-2006. �Dust precipitation rate is calculated as 99.9%, desulfurization rate as 90%.

�The detailed calculation formula is shown in Appendix.

48



3 The environmental condition of the area affected by this proposed project.

3.1 Summary of natural conditions

3.1.1 Geographical location Located at the east aide of the middle region of Shanxi Province and west foot of the middle part of Taihan Mountain, Pingding County covers an area of 1390km2�and the geographical coordinate is east longitude 113º26 -114º23 and north latitude 37º40 -38º07 . The plant site of Yangguang Power Plant is located in Pingding County, Yangquan City, Shanxi Province, 15km alwyto the city center of Yangquan and 3km away from the county seat of Pingding County. The place the plant is located is a flat and broad topography, neighboring with Nangao Village in the north acrossing Nangchuan River, Yangquan-She County Railway Line, which is connected with Shijiazhuan-Taiyuan Railway Line, passing through in the east side of the plant area, the special railway line of Yangquan No. 5 Coalmine passing through in the north of the plant and connecting with Yangquan-She County Railway line in Pingding Station, Yangxi highway is also passing through in the east side of the plant, Shijiazhuang-Taiyuan Expressway in the north of the plant, providing an excellent excess for the transportation. The location of the plant is shown in Figure 2.1-1.

3.1.2 Topography

Located in the middle plat of Taihan Mountain, Pingding County’s topography is high in the west and low in the east, surrounding by mountains at each direction, and the middle part of the county is hilly region. Most part of the county is mountainous region, covering about 65% of the total area, hilly area is the next, about 30% and small piece of plain area only covers 5% of the total. The topography is slanting from the west to the east with an average elevation of 1050 – 1350m, with an average landform slope of 11%.

Yangguang Power plant is located at the floodplain land area of the south bank of Nanchuan River and I-III grade terrain and some part of loess hilly area, the total tophgraphy is high in the south and low in the north and high in the west and low in the east, since it is backing with the mountain and facing with the river, there is a great different elevation between the south and north parts of the plant.

3.1.3 Geological formation

There are 6 different geological stratums of engineering in the location of the plant and some of the stratums are further divided into 2 sub-stratums as: miscellaneous filling soil and plain fill, loess-like silt, loess-like silty clay, scree, gravel, carboniferous benxi group rock and aotao fengfeng group rock.

3.1.4 Characteristic of climate and weather

49



The area the project is located belongs to temperate continental monsoon climate with distinct four seasons, serious drought in spring day season, hot and heavy raining in summer, fast reduction of temperature in autumn and cold and dry in winter season. Table 3.1-1 provides the result of actual measured climate data by Pingding weather station for many years. Figure 3.1-1 provides a distribution rose map of wind direction and frequency of Pingding County.

Table 3.1-1 Statistic of weather data in Pingding County

No. Item Statistic value Unit 1 Average rainfall in many years 507.8 mm 2 Average temperature in many years 10.5 �

3Extreme high temperature in many

years 40.4 �

4Extreme low temperature in many

years -17.6 �

5 Average air pressure in many years 930.4 hPa

6Average hydrosphere pressure in

many years 8.7 hPa

7Average relative humidity in may years

55 %

8Average evaporation volume in

many years 2059.9 mm

9 Deepest snow in many years 28 cm

10 Deepest frozen soil in many years 61 cm 11 Dominant wind direction W(frequency10.792%)12 Sub-dominant wind direction N(frequency9.268%)13 Average wind speed in many years 2.4 m/s 14 Highest wind speed in many years 24.0 m/s

N

E

5%

10%

15%C:13.24%

50



Figure 3.1-1 Wind frequency rose map of Pingding County

3.1.5 Ground water The closest ground water system of the project is Nanchuan River which originates from the place including Duanling Mountain, Qiling Mountain and Mashan at the crossing boundary of Pingding County and Xiyang County, belonging to Ziya River System of Haihe Drainage area and it is a sub-river of the first grade of Tao River. Nanchuan River is the largest river in the boundary of Pingding County with a length

of 26 km, drainage area of 307km2 and the annual total flow volume of 2148km3.

3.1.6 Underground water The underground water in the project area includes: clastic rock fracture water

and loose rock formation hole water. The major water containing stratum is

quaternary epipedon, upper shihezi K11 K12water containing stratum, lower shihezi

K8 K9 K10 water containing stratum, Shanxi group K7 water containing stratum,

Aotao system fracute water. The directions of underground water flow are all from two banks to valley and through the riverbed to downstream. According to the water and geological report by provincial 119 coal geological survey group, each of the wate containing stratum has its own water and geological characteristic individually, the water containing stratum and water isolation stratum are forming stratum mutually and usually there is no connection of water among these stratums and the depth of water containing stratum is usually deeper than 200 -300m.

3.1.7 Mineral resources

There are abundant mineral resources in this project area, the proven resources are: anthracite, bauxite, clay, limestone, marble and sulfur iron, especiall famous for anthracite, high clay and limestone.

3.2 Conditions for social environment

3.2.1 Administration plan and population distribution There are 8 counties 2 Xiang, 7 Residential Committee and 322 administrative villages under the administration of Pingding County. The population is 316,800, among those agricultural population is 254,900. The place the power plant located is belongs to Guanshan Township where there are 43 Villger Committee with total household of 36378 and total population of 93428 under the administration of the township, among those agricultural population is 50209. The residential points around the power plant are shown in Table 3.2-1.

Table 3.2-1 Major residential points distributed around the plant

51



Located to the plant Village

Direction Distance(km)

Numbe of

household Population

Xiaonanao Village E 0.26 67 210

Guanzhuan Village W 1.44 427 1364

Nanao Village N 0.81 630 1900

Changjiagou Village E 1.18 384 1250

3.2.2 Industry and agriculture

The major industries of Pingding County are power generation, coal production, sulphur production, fire-proof material and ceramic, the total industrial output of the county in 2006 was 3,928,990,000 yuan. The major enterprises near Yangguang Power Plant are Nanao Coalmine, Guanzhuan Ceramic Factory, Pingding Fertilizer Factory and Pingding Phosphor Factory.

There are about 410,000 mu cultivated farmland in the whole county, in 2006, the total agricultural output of the county was 212,450,000 yuan. There are 2941mu cultivated farmland in Guanshan Township, mainly planting millet, corn, sorghum and potato. The total output of crops was 6305 tons. 3.2.3 Transportation The plant has a wide land form, Yangshe Railway, which is connecting with Shijiazhuan-Taiyuan, is passing in the east of the plant, the special railway line of No.5 Coalmine is passing through to the north of the plant and connecting with Yang-she Railway line in Pingding County. Yang-Xi highway is also passing through the east side of the plant, Shijiazhuan-Taiyuan Expressway from the north of the plant providing an excellent access of transportation. 3.2.4 Ancient cultural relics There is no any state level nor provincial level protection historical relics in the project area.

3.3 Condition of ecological environment 3.3.1 Soil and crops The soil in the project area is distributed regulary as the altitude of the land, they can be divided into five soil sub-catatory as eluvial cinnanmon soil, mountainous cinnanmon soil, light cinnamon soil, light brown soil and light meadow soil. The place where the power plant is located belongs to light brown soil mainly planting the crops as millet, corn, sorghum, potato, wheat and soy bean. 3.3.2 Vegetation The coverage of forest in Pingding County is aboue 10%, among which natural forest covers 53.5%, mainly distributing in the mountainous regions of the southwest. Meadow resource covers an area about 140,000mu, mainly distributing in the wild

52



land of valley, river side and mountainous regions. The place where the plant is located is drainage area and slope of the mountain with very few of vegetation. 3.3.3 Ecological environment around the plant There is no important economic value, ecological value and viewing value and protectable value of terrestrial plants near the plant, rare natural vegetation, the agriculture is the major ecological environment mainly producing crops as millet, corn, sorghum, potato, wheat and soybean.

3.4 Living quality

The annual average wage of the workers in Pingding County in 2005 was 9380 yuan, the average disposable income of the urban resident was 4893yuan, average income per farmer 3101 yuan. There are 303 middle schools and primary schools with total number of 54341 students and 4177 teacher in the county. There are 43 sanitation organizations with 631 beds and 840 medical professionals. 40% of the whole administrative villages in the county have tap water and power supply for all the villages. 92% of the administrative villages have connected with telephone lines and highways.

3.5 Current situation of environmental quality

For this appraisal, the monitoring data for the current situation of environmental quality for the environmental appraisal in the project area have been collected, Figure 2.5-1 shows the monitoring points of current monitoring. Including in the monitoring data on environmental air are from December 13 to 19 in 2006, with a data valid for these sevey days. The gound water and underground water monitoring data are from December 22-24 2006 from the continuous 3 days of monitoring. The noise is from December 21-22 in 2006 from the continuous 2 days of monitoring. 3.5.1 Current situation of environmental air Table 3.5-1 is the result of average concentration of the air pollutants at 5 monitoring points at the monitoring day withing the area. From the table, we can find that current situation of NO2 within the project area is fine, but soot and SO2 pollution are relative serious. The major reasons causig the serious pollution include the natural condition and weather condition, dust caused from transportation and living pollution sources and the industrial pollution is the most important factor among them, the reason of higher SO2 pollution is contributed from the 3 thermal power plants located in the area.

53



Table 3.5-1 Results of monitoring on current situation of environmental

air quality

Monitoring item

Monitoring points

Daily average concentration range(mg/m3)

Over standard rate

(%)

Largest over standard multiple

Site of plant 0.404-0.712 100 1.37 TSP Pinding

County seat0.210-0.619 71.43 1.06

Site of plant 0.229-0.569 100 2.79 Pindging

County seat0.065-0.132

0--

Xishouhuang 0.230-0.587 100 2.91 Zhuanwo 0.082-0.226 42.86 0.51

PM10

Songjiazhuan 0.369-0.895 100 4.97 Site of plant 0.049-0.242 71.43 0.61 Pindging

County seat0.299-0.817 100 4.45

Xishouhuang 0.060-0.171 28.57 0.14 Zhuanwo 0.131-0.455 85.71 2.03

SO2

Songjiazhuan 0.378-0.723 100 3.82 Site of plant 0.027-0.060 0 -- Pindging

County seat0.050-0.105 0 --

Xishouhuang 0.016-0.042 0 -- Zhuanwo 0.014-0.081 0 --

NO2

Songjiazhuan 0.018-0.061 0 --

54



Figure 3.5-1 Distribution map of monitoring points for current

environmental quality

3.5.2 Current environmental quality of underground water

Table 3.5-2 shows the monitoring results of 3 monitoring section water quality from Nangchuan River, among which section S1 is located at the upperstream 500m to the power plant, S2 at the downstream 500m from the power plant, and S3 is the downstream 3km away from the power plant, where is the discharge point for domestic waste water of the county. From the table, we can find out that 7 items of pH, BOD5, oils, cyanide, volatile benzene, sulfide and fluoride all meet the standard for water quality of IV category from “Standard for the Environmental Quality for Underground Water”(GB3838-2002). Since the domestic waste water of the county is diacharged at the section S3 into Nanchuan River, the flow volume of S3 is increased, and COD at S3 section shows exceeding standard. Both banks of Nanchuan River, there are paper mill and domestic waste water discharging into the river, ammonia

N

NE

E

SE

S

SW

W

NW

Illustration

For air quality

Ground

55



nitrogen at 3 sections shows over standard rate seriously especially at the section S3 with the highest multiple of 8.0 to the standard.

Table 3.5-2 Results of monitoring to water quality from Nangchuan

River Monitoring items

Monitoring sectionpH CODBODoilsCyanide

Ammonia nitrogen

Volatilebenzene

sulfidefluorideFlow volume m3/s

Average concentration

7.8016.632.93 -- -- 2.62 -- -- 0.39

Over standard rate

0 0 0 0 0 66.7 0 0 0 S1

Highest overstandard multiple

- - - - - 1.57 - - -

0.426


7.6023.233.20 -- -- 3.56 -- -- 0.45

Over standard rate

0 0 0 0 0 100 0 0 0S2


- - - - - 1.47 - - -

0.561


7.4428.533.23 -- -- 13.30 0.003 -- 1.05

Over standard rate

0 33.3 0 0 0 100 0 0 0S3


- 0.01 - - - 8.0 - -

0.669

Note Except pH and specialy marked, other units are all mg/L

3.5.3 Current situation of environmental quality for underground

water

56



Table 3.5-3 shows the results of monitoring to the underground water quality. Among the 11 items of 2 wells for the monitoring, except total hardness and sulfate from No.2 well are over standard, other items all meet the standard of water quality category III from “Standard for Underground Water Quality” (GB/T14848-93). The situation of overstandard of total hardness and sulfate has the relationship with the local geological condition.

Table 3.5-3 Results of monitoring to underground water quality Monitoring items

Monitoring

point

Moni-

toring

time pH fluorite

Total

hardnesssulfide

Ammonia

nitrogen

Nitrate

nitrogen

Nitrite

n

hexavalent

chromium

Bacteria

number

Group

caliform

12.22 7.46 0.36 324 148 -- 3.99 0.016 -- 12 <3

12.23 7.18 0.36 324 147 -- 4.01 0.015 -- 12 <3 1#

Xibaian 12.24 7.56 0.36 322 146 -- 4.01 0.016 -- 16 <3

12.22 7.41 0.24 613 431 0.058 6.91 -- -- 54 <3

12.23 7.4 0.24 615 434 0.048 6.96 -- -- 7 <3 2#

Zhuanwo12.24 7.4 0.24 613 431 0.052 6.96 -- -- 24 <3

Note pH no unit concentration unit of bacteria number is N/mL, unit for total caliform group is

N/L; “—”means no result.

3.5.4 Current situation of sound environmental quality

Table 3.5-4 shows the current results of monitoring of noise. The results show that the noise in the boundary within the plant at day and night all meet the standard of “Standard for Noise of industrial boundary”(GB12358-90), among those the north border of the plant carries out Category IV standard, others category II standard. The noise in Xiaonanao near the plant at night and day meets the standard of category II from “Standard of Noise Environmental Noise for Urban Area”(GB3096-93), the noise environment quality in the site of the plant is much better.

Table 3.5-4 Results of monitoring for current noise Day Night

Monitoring

point Monitoring

value

Appraisal

standard

Situation of

meeting standard

Monitoring

value

Appraisal

standard

Situation of

meeting standard

N. boundary 1 50.10 70 Yes 48.58 55 Yes



57



E. boundary 1 52.45 60 Yes 49.59 50 Yes




S. boundary 1 45.20 60 Yes 43.36 50 Yes



W. boundary 1 44.46 60 Yes 43.51 50 Yes



Xiaonanao

village 51.66 60

Yes 44.85 50

Yes

58



4 Analysis to the environmental impacts of the proposed project and solutions to protect and control pollution

4.1 Analysis to the environmental impacts during the construction period 4.1.1 Analysis to the impacts of environmental air

�Transformation project of frequency conversion of primary fan of No. 1 boiler The project needs to establish a brick and mixture structure frequency

conversion control room with 40 square meters and small amount of dust will be produced during the construction but since the construction volume is very small, the dust produced from construction is also very small.

During the construction period, management on construction should be strengthened, the trucks transporting building materials should be covered with manta, cover or other measure to prevent the splashing. The building materials to be used for construction should be placed at the site according to the requirement, and when it is necessary, fence or wall should be set up to prevent the production of dust.

After the implementation of the above measures, the small amount of dust produced from the construction will not bring negative effect to the surrounding environment.

�Installation project of online monitoring system on coal powder pipe for No.4 boiler.

The installation of 16 sets of online monitoring needs to make transformation to the existing equipment as well as the pipe lines, therefore, it is necessaryto process cutting, welding and drilling and small amount of soot will be produced from the process.

During this process of transformation, the welding volume is vey small so the soot produced from welding is also very small. The ventilation can be increased to the working site. Therefore, the soot produced from welding will not bring any negative impact to the surrounding environment.

�Transformation project of steam seal of No.4 turbine group. The transformation project of steam seal needs to process cutting, welding and

drilling at the existing equipment and some amount of soot will be produced from welding during this process.

Since the welding volume in the transformation project is very small, the soot produced from welding is also very small, The ventilation can be increased to the working site. Therefore, the soot produced from welding will not bring any negative impact to the surrounding environment.

�Development project of anti-balance coal consumptioncalculation software for the whole plant.

The installation of 12 sets of measuring equipment needs to process the transformation to the existing equipment and pipe lines, therefore, cutting, welding

59



and drilling is necessary and some amount of soot will be produced from this process of welding.

The welding work in the transformation process is very small therefore the soot produced from welding is also very small. The ventilation can be increased to the working site. And the soot from welding will not bring any negative effect to the surrounding environment.

Through the above analysis, the transformation project on energy saving has very small engineering process and after the implementation of relative protection and control measures, it will not bring any negative effect to the environmental air surrounding the site.

4.1.2 Analysis to environmental impact of water

�Transformation project of frequency conversion of primary fan of No. 1 boiler The project needs to establish a brick and mixture structure frequency

conversion control room with 40 square meters and small amount of construction waste water will be produced in the construction, but since the construction scale is very small, the waste water produced from the construction is very small.

During the construction, small amount of construction waste water containing mud will be produced and it will be re-used after sedimentation for the mixture of material for construction.

After application of the above measures, the small amount of construction waste water produced from the process of construction will not bring any negative effect to the underground water environment.


During the process, no waste water will be produced and no negative effect to underground water environment.

�Transformation project of steam seal of No.4 turbine group. During the process, no waste water will be produced and no negative effect to

underground water environment. �Development project of anti-balance coal consumptioncalculation software for

the whole plant. During the process, no waste water will be produced and no negative effect to

underground water environment. �Domestic waste water During the transformation process, the construction workerswill stay in the

dormitory in the plant, the small amount of domestic water produced will be collected by existing domestic waste water collection system and after the treatment it will be re-used.

Through the above analysis, this project on energy saving has a very small volume of engineering and after the application of relative measures for protection, no waste water will be discharged and no effect to the gournd water environment

60



4.1.3 Analysis to sound environmental impact �Transformation project of frequency conversion of primary fan of No. 1 boiler The project needs to establish a brick and mixture structure frequency

conversion control room with 40 square meters and during the process the machines and equipment will produce noise of about 60 -70B(A).

Since a small volume of engineering and the equipment for the construction can choose those with low noise and the construction arrangement is reasonable, the noise from the construction can be reduced. The construction site is located in the existing place of the plant, therefore, it can not bring any impact to the residents living around the plant.


The installation project of online monitoring system on coal powde pipe will produce noise about 50-60B(A) during the process of machine work. Since a small volume of engineering and the equipment for the construction can choose those with low noise and the construction arrangement is reasonable, the noise from the construction can be reduced. The construction site is located in the existing place of the plant, therefore, it can not bring any impact to the residents living around the plant.

�Transformation project of steam seal of No.4 turbine group. During the transformation project of steam seal, the machines will produce 60-

70B(A) noise. Since a small volume of engineering and the equipment for the construction can choose those with low noise and the construction arrangement is reasonable, the noise from the construction can be reduced. The construction site is located in the existing place of the plant, and the workshop can work as the noise isolation, it can not bring any impact to the residents living around the plant.


The machines for the installation of measuring equipment will produce 50-60B(A) noise during the process of implementation. Since a small volume of engineering and the equipment for the construction can choose those with low noise and the construction arrangement is reasonable, the noise from the construction can be reduced. The construction site is located in the existing place of the plant, therefore, it can not bring any impact to the residents living around the plant.

Through the above analysis, this project on energy saving has a very small of engineering and all the construction sites are within the existing area of the plant or in the workshop of the plant and very far to the boundary of the plant. After the application of necessary solution, it will not bring any impact to the nearest village of Xiaonanao Village. 4.1.4 Analysis to the environmental impact of solid waste

�Transformation project of frequency conversion of primary fan of No. 1 boiler

61



The project needs to establish a brick and mixture structure frequency conversion control room with 40 square meters and during the process, small amount of construction waste will be produced. But since the construction volume is very small, the amount of produced construction waste is also very small.

The construction volume of the project is very small and small amount of construction waste can be treated together with the domestic waste of the plant and it will not bring any negative impact to the surrounding environment.


No solid waste will be produced and no positive impact will be brought to the surrounding environment.

�Transformation project of steam seal of No.4 turbine group. During the transformation of steam seals, 78 waste rings will be replaced and

they are alloy made of the materials as iron, manganese, chrome which can be sold out to recycle for utilization. They will not bring any side impact to the surrounding environment.


No solid waste will be produced and no positive impact will be brought to the surrounding environment.

�Domestic waste Small amount of domestis waste produced from the construction workers living

in the dormitory of the plant can be transported to the appointed landfill together with the domestic waste for treatment. Through the analysis above, the construction volume of the transformation project is very small and the production of solid waste is very small which can be treated suitable or made comprehensive utilization and they will not cause any side impact to the surrounding environment.

As we mention above, the engineering volume of the transformation project on energy saving is very small and all the contents will be done withing the plant. The impact to environment is very small, the construction of the project is limited within the boundary of the plant or some part and they are all temporary processes which can berecovered. Therefore, the project can not bring any abvious side impact to the surrounding environment during the construction period.

4.2 Analysis to the environmental impact during operation period 4.1.1 Analysis to the environmental impact of air During the operation period, this transformation project on energy saving will not bring any negative impact to the environmental air, but also can reduce the pollutants emission and improve the aie quality of the environment in some extent. 4.1.2 Analysis to environment impact of water

62



No waste water will be produced during the operation of the project and no negative impact will be brought to environmental water. 4.2.1 Analysis to environmental impact of sound

�Transformation project of frequency conversion of primary fan of No. 1 boiler During the operation period, the radial flow fan in frequency conversion for

cooling system will produce 60dB(A) noise. Since the radialflow fan is a small power , the noise produced is very low, and

after the insulation function of the control room the noise value can be reduced to about 20dB(A). The control room for frequency conversion is located near the major workshop of the plant, far from the boundary of the plant. Therefore, it will not bring any impact to the residents living near it.


The online monitoring system produces almost no noise during operation therefore it will not bring any impact to the sound environment.

�Transformation project of steam seal of No.4 turbine group The steam seal after the transformation will produce noise during the operation

of the turbine unit, but since the clearance after the transformation is very small, the noise produced from steam seal after transformation will no increase. And the plant has already used sound-protection cover to the generator and the measurement as the sound-proof for the workshop. Therefore, it will not produce any impact to the residents living around.


The measuring equipment will not produce any noise during the operation. Through the analysis above, the noise produced from the operation of the

transformation project on energy saving is not large and theyare all located in the workshop and far from the plant boundary. After the application of prevention measures, it will not produce any impact to the noise withing the boundary of the plant and not to Xiaonanao Village which is the nearest one to the plant. 4.1.4 Analysis to the environmental impact of solid waste During the operation, the transformation project on energy saving will not produce any solid waste and not affect the environment surrounding it.

As mentioned above, this transformation project on energy saving will not produce any side impace to thesurrounding environment and it can reduce the pollutant emission and improve the quality of reginal environment to some extent.

4.3 Analysis to the impact of sociall environment �Land requisition This transformation project on energy saving is processing in the existing place

of Yanggung Power Plant without the necessary for lant requisition. � Resettlement

63



This transformation project on energy saving is processing in the existing place of Yangguang Power Plant and it will not produce any impact to the residents living around and not resettlement is needed.

Through the analysis above, the transformation project on energy saving has no concern with land requisition and resettlement, and not bring any side impact to the social environment. Furthermore, through the reduction of pollutants and improvement of the environmental quality, it is favorable to increase the health standard of the local people.

4.4 Analysis to the positive benefit of energy saving and emission reduction �The transformation project of frequency conversion of primary fan on No.1

boiler uses the frequency conversion to control the rotate speed of primary fan to achieve the control of supplying wind volume, which can reduce the energy consumption than the former baffle control, and the coal consumption of the whole plant will reduce 0.195g/kwh, saving 1560 tons of standard coal annually, and the

reduction of the production of soot, SO2 NOX and CO2 for

575.9t/a 60.9t/a 14.1t/a and 4154.9t/a respectively and the reduction of the

emission of soot, SO2 NOX and CO2 respectively.

�The transformation project of online monitoring system on coal powder pipe on No.4 boiler can realize the online measuring to the flow, equality and concenstration of coal powder and make adjustment according to the result of measurement to achieve balance condition, realize the optimized and stable combustion and reduce the amount of carbon content of the flying ash, balance the temperature of the hearth and increase the combustion efficiency of the boiler. The coal consumption of per turbine can reduce 3.6g/kwh and save 7200 tons of standard

coal annually, the reduction of the production of soot, SO2 NOX and CO2 of

2656.7t/a 280.9t/a 65.2t/a and 19166.6t/a respectively, and the reduction of

emission of SO2 NOX and CO2 of 2.6t/a 28.1t/a 65.2t/a and 19166.6t/a

respectively. �The transformation project of steam seal of No.4 turbine group will replace 78

steam seals to reduce the steam leaking volume of the turbine and raise the economic capacity and safety of the turbine. The coal consumption of per turbine will reduce 3g/kwh and save 6000 tons of standard coal annually, the reduction of the production

of soot, SO2 NOX and CO2 of 2213.7t/a 234.1t/a 54.4t/a and 15970.5t/a

64



respectively and the reduction of emission of soot, SO2 NOX and CO2 of

2.2t/a 23.4t/a 54.4t/a and 15970.5t/a respectively.

�After the application of anti-balance coal consumption calculation software for the whole plant, it can make a more exact calculation to the coal consumption of power generation and improve the operation, let the special professional to have a realtime control on the coal consumption and make pertinence adjustment in time. The coal consumption of the whole plant will reduce 0.5g/kwh and save 4000 tons of standard

coal, the reduction of the production of soot, SO2 NOX and CO2 of

1475.7t/a 156.1t/a 36.3t/a and 10647.0t/a respectively and the reduction of the

emission of soot, SO2 NOX and CO2 of 1.5t/a 15.6t/a 36.3t/a and 10647.0t/a

respectively. According to the above analysis, after the implementation of the transformation of the four sub-projects, Yangguang Power Plant will save 18760 tons of standard coal

annually and reduce the production of soot, SO2 NOX and CO2 of

6922t/a 732t/a 170t/a and 49939t/a respectively and reduce the emission of soot,

SO2 NOX and CO2 of 6.9t/a 73.2t/a 170t/a and 49939t/a respectively which will

bring certain degree improvement to the air quality of the environment around Yangguang Power Plant. As summary of above, through the analysis to the positive environment impact brought by the projects during the construction period, operation period, social and environmental impact and the operational environmental impact, we can find that the positive environmental impact of the project is much higher than it environmental negative impact, it is favorable for the improvement of the environmental quality and have certain degree of social and environmental benefit.

65



5 Comparison and selection of the plans

5.1 Analysis of zero plan � The transformation of frequency conversion on primary fan of No. boiler

No transformation

At present, the primary wind system is using the adjustment of intake baffle of primary fan to make adjustment to the pressure of cool and hot wind major pipes, and the baffle has a great volume of the loss of throttle in the system and the energy consumption is large.

Transformation of frequency conversion

This will chage the primary fan into frequency conversion control, through the change of the primary fan, it can directly control the volume of coal powder production of the coal grinding machine and reduce the loss of throttle and reduce the energy consumption. The energy consumption will reduce about 30% than before and save 1560 tons of standard coals in one year. Therefore, the transformation project on energy saving of primary fan on No.1

boiler can reduce the energy consumption and realize the target of energy saving and emission reduction.

� The transformation project of installation of online monitoring system on coal powder pipe of No.4 boiler.

No transformation

At present, there are measuring holes on coal powder pipe to realize the adjustment of wind speed measuring offline when boiler is under combustion, but it is impossible to make online measurement to the concentration, flow speed of the coal powder and it is impossible for the operators to have a realtime control on the coal powder parameters in the hearth and can not realize a pertinence adjustment which will easily cause the slant combustion and abnormal overheat of the hearth, production of coke, and the fineness of coal powder can not become the best degree of fineness, the energy consumption of fan will increase and the economic capacity reduce.

Installation of online monitoring system

Installation of online monitoring system to realize the continuous measuring of the concentration and speed of coal powder and make adjustment according to the measuring result can realize the optimized combustion and make the combustion more stable, the carbon content of the ash smaller, the temperature of

66



the hearth more equalble and increase the boiler efficiency, saving 7200 tons of standard coal every year.

Therefore, the the installation of the online monitoring system on No.4 turbine can increase the economic capacity of the turbine operation and heat efficiency of boiler, save coal and realize the goals of energy saving and emission reduction.

� Transformation of steam seal of No. 4 turbine group

No transformation project

At present, the steam leaking volume at high and medium pressure rear shaft is very serious, water sinking into the oil tank is serious, the large clearance of low pressure front and rear sharts affects the vacuum of condenser, and the clearance between high and medium pressure cylinder blade top steam seal is overstandard resulting in the large consumption of steam of turbine, low efficiency and rising of the energy consumption for power generation and there is no guaranty for the economic capacity and security of the turbine group.

Implementation of the transformation of the replacement of steam seals.

To replace the existing labyrinth type steam seals of No. 4 turbine group into contace type steam seal, which has an advantange of good result of seal and can solve the problem of steam leaking of the turbine with an obvious effect in energy saving. After the transformation, the flow rate of high and medium pressure cylinder will increase 1%, and greatly increase the economic capacity of the turbine and save 6000 tons of standard coal annually. Therefore, after the transformation of tehs steam seal, it can solve the existing

steam leaking problem, increase the efficiency of the turbine and realize the goals of energy saving and emission reduction.

� The development of anti-banance coal consumption calculation software for the whole plant

No development of the software

If no development of anti-balance coal consumption calculation software, it is impossible to verify the veracity of positive balance coal consumption nor the coal consumption of each turbine, and the operation and management staff can not have a good understanding to the energy consumption and cannot make adjustment accurately and the goals of energy saving and emission reduction can not be realized.

Development of anti-balance software

After the development of the software, the operation and management staff can have a realtime control on the energy consumption through the realtime calculation of anti-balance coal consumption calculation and make realtime adjustment accordingly. It can save 4000 tons of standard coal annually.

67



Therefore, after the application of the software, it is possible to make an analysis to the index as coal consumption and finally realize the optimized management to achieve the goals of energy saving and emission reduction.

As illustration above, if there is no transformation project on energy saving in Yangguang Power Plant, the energy consumption of the whole plant will continue to increase and the related pollutionemission. If we have succeeded in the application of the World Bank Global Environment Fund and we can implement the above mentioned 4 sub-projects on energy saving. After the completion of the transformation, the plant can save 18760 tons of standard coal annually, reduce the

production of soot, SO2 NOX and CO2 of 6922t/a 732t/a 170t/a respectively, and

the reduction of soot, SO2 NOX and CO2 of 6.9t/a 73.2t/a 170t/a 49939t/a

respectively for the achievement of energy saving and improvement of the environment of the region.

5.2 Comparison and selection of the alternatives 5.2.1 Comparison and selection of the different control modes for the transformation of energy saving primary fan for No. Boiler The transformation of energy saving of primary fan can choose frequency conversion controller or Hydro-dynamic Coupling. This project has selected the frequency conversion transformation through the comparison and selection of these two modes as the recommendation plan for this project. The detailed conditions are shown in Table 5.2-1.

Table 5.2-1 Comparison between two kinds of control modes fo energy saving tranformation

Plan

Project Recommended Plan Alternative plan

Control mode Transducer Hydro-dynamic coupling

Operation theory

Through the transducer, to control the rotate speed of primary fan to change the wind supply volume to directly control the powder production of coal grinding machine.

Throuogh the change of the fillness of the liquid in working cavity to realize the stepless speed changing and change the output power under the condition of unchanged rotate speed of the motor.

Adjusted precision

Accurate Poor

Change of rotate speed

small large

Change of small large

68



supply wind volume

Disturbe to boiler combustion

small large

Complexness of the system

The control system of frequency conversion is simple, it is composed of transducer, switch and synchronized power source switch equipment.

The system is complex since the hydro dynamic coupling needs lubricant, working oil system and associated cooling system.

Maintenance easy difficult

Result of energy saving

The energy saving is 30% with that before the

transformation

Energy saving effect is not obvious

From the above table 5.2-1, we can learn that the frequency conversion has the advanges of presicion of adjustment, small disturb to boil combustion and simple coltrol and maintenance, the most important advantage is that the effect of energy saving of the project is very obvious and the power saving volume is 30% of the of the former and it is suitable for the enrgy saving transformation for primary fan. 5.2.2 Compasiron and selection for the installation of online monitoring system on coal powder pipe for No. boiler.

The measurement for the coal powder density for primaryfan of the boiler has many mthods but in conclusion there are two major varieties: i.e. direct method and indirect method.

Including in direct methods are: micro-wave method, photoelectricity measuring method, laser method, ultrasonic method and electric charge method.

Indirect method, it is also called as thermodynamics method. The measuring theory is based on the law of conservation of energy, continuous equation, and momentum law and it is simplified on the base of suppose, to establish related math model. During the process of actual measuring with the indirect method, the primary measuring element is the measuring element the plant is usually using for the temperature, pressure and pressure difference, and these parameters are the base parameters used by the plant during the operation, but the selection of measuring points is difficult, the measuring system is not very stable and some problems as anti-fatigue and anti-jam, it is seldomly used in the practice.

Throught the analysis and comparison, the recommended plan for the project has determined to use the electric charge method from the direct methos and the alternative plan is the ultrasonic method from direct method. The detailed conditions are shown in Table 5.2-2.

Table .2-2 Comparison of two kinds of online measuring methods

69



Plan

Project Recommended plan Alternative plan

Measuring method

Electric charge inductive ethod Ultrasonic method

Operation theory

During the transportation of coal powder, it will produce static charge and static charge field will be produced accordingly. When coal powder particle with charge passing through the metal sensors, the surface of sensors will produce equal amount of inductive electric load and form inductive current, the amount of inductive current has relation with the flow of coal powder quality. After the treatment and analysis to the signals, then we can get the signal of the density of the coal powder.

To install 2 ultrasonic sensonrs on two corresponging surface of coal powder pipe, the first is to measure the transmission time of ultrasonic impulse along the two directions, the second one to mesure the attenuation of the flow vertical with the transimisson. The attenuation is affected by both the air microturbulence and coal powder density.

Industrial application

Yes Yes

Measuring precision

Accurate Veracity needs to be

improved

Energy saving result

Saving 2000 tons of standard coal annually

Since veracity is not high, energy saving effect is limited

From Table 5.2-2, we can learn that the recommended plan of electric charge inductive method is of advantage of high accuracy in measuring and the measurement can reflect the actual condition to guide the operation staff to make realtime adjustment to increase the economic capacity of the turbine operation.

5.2.3 Comparison and selection of different modes of transformation for steam seal of No.4 turbine. Tranaformation of the turbine for improvement of efficiency includes the changing the existing steam seal into contact type steam seal (material is ferrite) or labyrinth type steam seal (material is ferrite), and the flowing part of turbine can also be transformed, changing blade into high efficient blade. This project has chosen the plan of changing the existing steam seal into contact type steam seal (material of tooth is ferrite) as this recommended plan through the comparison and analysis of three different modes. Detailed conditions are shown in Table 5.2-3.

Table .2-3 Comparison of the transformation modes for turbine efficiency

plan Recommended plan Alternative plan 1 Alternative plan 2

70



project

Transformation mode

Change into contact type steam seal (ferrite)

Still using labyrinthtype steam seal, change the material into ferrite

Change the blade of turbine into high efficient blade

Advantages and disadvantages

Contact type of steam seal is a kind of seal without any clearance, i.e. no clearance between shaft and seal to effectively play its function of seal. After changing the material into ferrite, it has the advantage of being difficult to be hardened, which raises the strictness and economic capacity.

Though ferrite has the advantage of being difficult to be hardened and easy to be milled, the clearance can be adjusted to small but not to zero, so it can not achieve the best result of energy saving.

Since it needs large amount of investment, long construction period, it is not suitable to use it under the condition of intense power generation.

If it can solve the issue of air leaking problem

Completely solve the problem Solve the problem in a certain

extent Can not solve

Transformation cost

1.2 million Yuan low investment, long construction period

Energy saving result

Save 6000 t.of stand coal Energy saving result is not good

enough Better result in energy

saving

From above Table 5.2-3, we can learn that the recommended plan is going to change the existing steam seal into contact type steam seal (ferrite), which has the advantage of good seal effect, solving the existing problem of steam seal and achieving a better result in energy saving 5.2.4 Comparison and selection for the development of coal consumption calculation software for the whole plant The development of coal consumption calculation software can include the positive balance coal consumption calculation software of anti-balance coal consumption calculation software which are developed by the plant it self, or can purchase coal consumption calculation software directly from abroad. Through the comparison of three plans, we have decided to use anti-balance coal consumption calculation software as our recommended plan. The detailed conditions are shown in Table 5.2-4. Table 5.2-4 Comparison of development for coal consumption calculation softwares

plan

project Recommended plan

Alternative plan 1

Alternative plan 2

Development mode

Development anti-balance coal consumption calculation software by the plant itself.

Development of positive balance coal consumption calculation software by the plant itself.

To purchase directly the software from abroad

71



Advantages and disadvantages

The software cen exactly reflect coal consumption of 4 turbines, then the controller can control the operation efficiency through the good understand to the economic operation and make adjustment more effectively.

Positive balance software has some error in the measuring and the output will not be very exact and not to achieve the best result on energy saving

The cost for purchase is too expensive and the maintenance cost is too high.

If it can colve the existing problem of air leaking of turbine

Copletely solv Solve the problem at some extent

Not

Cost 3.6 million yuan 3.6 million yuan 8 million yuan

Energy saving effect

Save 6000 tons of standard coal

Not good enough

Better result in energy saving

From the above Table 5.2-4, the recommended plan which is anti-balance coal consumption calculation software developed by the plant can exactly reflect the coal consumption of 4 turbines and let the adjustment become more effectively and the result of energy saving better.

5.3 The summary of the recommended plans for the project

Through the comparison and selection for four energy saving transformation subprojects from the points of economy, technical level and the result of energy saving, the determined recommended plans for the transformation project on energy saving are shown in Table 5.3-1.

Table 5.3-1 Summary for the recommended plans for transformation for energy saving

plan

project Recommended plan

Transformation of frequency conversion of primary fan on No.1 boiler

Transformation of frequency conversion

Installation of online monitoring system on coal powder pipe on No.4 boiler

nstallation of online monitoring system

Transformation of steam stel on No.4 turbine

Transforming into contact type steam seal (ferrite)

72



group

Development of coal consumption software for the whole plant

Development of anti-balance software

73



6 Environmental management and monitoring plan

The environmental management and monitoring are the most important process of the management. Establishment of complete environmental protection organization, strengthening of the environmental management, carrying out the environmental testing and monitoring and bringing the environmental protection into the production management all have great significance to the reduction of pollution emission of the enterprise, promoting the reasonable utilization and recycling of the resources and increasing of economic and environmental benefit.

Since putting into production in 1999, Yangguang Power Plant has already formed a complete environmental management system, established “Environmental Management System” and had relative high standard in environmental management. To further improvement of the environmental management of the whole plant, the environmental management of this transformation project on energy saving will be included into the existing environmental management system for implementation.

6.1 Major environmental impacts and reduction measure

Major environmental impacts during the construction and operation period of this transformation project and the measure for reduction of them are shown in Table 6.1-1.

6.2 Environmental management plan

6.2.1 Establishment of the organization for environmental management

According to the regulations regulated from “Environmental Protection Laws of PRC” and “Environmental Protection Management Regulations for Construction Project”, Shanxi Provincial Environmental Protection Bureau is the environmental management organization for this project. The responsibility is to put forward the requirements for environmental protection according to the contents of Environmental Impact Appraisal Report and coordinate the different departments for the environmental management and be in charge of organization for the checking and acceptance work for environmental protection facilities.

The Devision of Power of Shanxi Provincial Economy and Trade Commission is in charge of the planning and the monitoring and management on the environmental protection for this project during the process; Yangquan Environmental Protection Bureau is in charge of the implementation plan and carrying out the different technical standards; Yangquan Environmental Protection Bureau will be in charge of the monitoring for the implementation of environmental protection of this project.

Environmental Protection Department will be set up in the construction unit to be in charge of the environmental management and monitoring work during the different processes of the project and carrying out the environmental protection law and regulation and planning and checking the implementation of environmental protection measures of the project, promotation of the application of the advanced technique and experience on environmental protection; organizing the technical training on the environmental protection for the project to raise the personnel standard.

74



Since the contents of environmental management during the construction and operation periods are very different, and they are also different in the time period, one is temporary and other is long term, different organizations should be set up and implement the responsibilities for different time period. After the completion of the construction, the related management organization should be closed down, and the organization in charge of the operation begins to operate. But these two different organizations can be work at the same time together for some period according to the specific conditions of the project.

6.2.1.1 Management organization of environment during the construction period

The environmental management organizations during the construction of the project include: Shanxi Provincial Environmental Protection Burea, Yangquan EPB, World Bank Office, Power Division of Shanxi Provincial Economic and Trade Commission. During the construction period, Yangquan EPB is under the guidance of Provincial EPB to carry out the related regulations, standards on environmental management, to monitor the construction unit in the implementation of environmental management planning, to coordinate the different departments to do environmental protection work well, to be in charge of the implementation of environmental protection facilites, checking and acceptance for the completion, monitor the management. The design and the implementation of envionmental management during the construction will be responsible by monitoring unit, design unit, EIA unit and construction respectively.

75

Environmental Impact Report on Transformation of Energy Saving and Emission Reduction forShanxi Yangguang Power Generaration Company Ltd.


Table6.1-1 Major environmental impactsof the transformation project and themresures to reduce them

periodEnvironmental

factorsProject Major environmental impacts Reduction measures

Implementationunit

Monitoringunit

Transformation of frequencyconversion of primary fan on No.1 boiler

Small amount of dust will beproduced form theconstruction of the

project

Dust production is verysmall, to strengthen themanagement on construction

Installation of online monitoringsystem on coal powder pipeon No. 4 boiler

Transformation of steam seal for No. 4turbinegroup

Environmentalair

Development of anti-balancecoalconsumption calculation softwareof thewhole plant

Cutting, welding and drilling willbedoneduring theconstructionprocessand small amount of soot willbeproduced from welding.

Soot from welding is verysmall, to strengthen theventilation at construction site


Small amount of wastewater willbeproduced in theprocess ofconstruction

Wastewater fromconstruction will beused formixing material aftersedimentation


No wastewater will beproduced —

Transformation of steam seal for No. 4turbine group

No waste water will be produced —

Waterenvironment

Development of anti-balance coalconsumption calculation software of thewhole plant

No waste water will be produced —


Construction machines willproduce 60-70B(A) noise

Installation of online monitoringsystem on coal powder pipe on No. 4 boiler

Installation process of onlinemonitoring equipment will produce50-60B(A) noise from constructionmachines

Dur

ing

the

cons

truc

tion

peri

od

Soundenvironment


Transformation of steam seal willproduce 60-70B(A) noise fromconstruction machines.

Small volume ofconstruction, equipment withlow noise will be used forreasonable construction toreduce the noise from theconstruction

Constractor ofconstruction

YangguangPower Plant andYangquanEnvironmentalProtectionBureau

76



Development of anti-balancecoalconsumption calculation softwareof thewhole plant

Installation process of measuringequipment will product 50-60B(A)noise from theconstruction machines


Small amount of constructionwastewill beproduced in theprocessof construction

Very small amount ofconstruction will be treatedtogether with domestic wasteoftheplant


No solid wastewill beproduced —


78 waste rings will be replacedduring the transformation of steam sealproject, they are alloy of iron,manganese and chrome

They can be sold out aswaste and recycled forutilization

Solid waste

Development of anti-balance coalconsumption calculation software of thewhole plant

No solid waste will be produced —

Continuous Table 6.1-1

Period

Environmental

factor

Project

Major environmentalimpacts

Reduction measuresImplem

entation unitMonit

oring unit

77



Boilersoot

Major pollutants influegas emitted fromboiler

are

SO2 soot NO2

�Using 2 chambers, 4 staticelectric precipitators in No.1 and 3 boilers, theprecipitation rate

ishigher than 99% Using bag filters in No. 2 and 4 boilers, precipitation rate is99.9% and

emission concentration of soot is <50mg/m3

�Using limestone-gypsum desulfuration for No.1-4 boilers, desulfuration ratehigher than90% and emission concentration of SO2 is <400mg/m3

�Emission concentration of nitrogen oxide is <1500mg/m3

�Installation of onlinemonitoring system is favorable for monitoring and management ofpollution sourceof wastegasand reduction of air pollution to environment.

Environmental

air

Coalash

During theprocess ofstorageand transportationof coal, slad, emission ofpowder (coal) dust will beproduced.

�Transportation trucksshould havecovers on them�Wind shielf or water spraying equipment be installed around thecoal yard, which can

reduce theproduction of coal dust to more than 70%.�Bag filterswill be installed to coal conveyer and coal supply tank in themajor workshop�Close typeconveying system will be installed in theconveyor for transportation of coal�Improve planting belt, theplanting rateof theplant should be80% more than theareawhich

can beplanted.

Dur

ing

the

oper

atio

n pe

riod

Water

environment

Wastewater

Theproduced watewater: circulation coolingwater, anti-leakingtreatment system wastewater, acid-containingwastewater producedfrom production ofchemical brine, domestiswater, wastewater fromfluegas delsulfurization,transportation sytem andcoal yatd wastewater.

�Industrial waster water include regenerated acid wastewater from chemical water treatmentsystem, drain water from filter and anti-leaking equipment, rosin containing wastewater fromcondensing water treatment system, wastewater from boiler cleaning, and washing water for thefloor in theworkshop. Thewastewater produced from industrial production is discharged intoindustrial wastewater treatment system to filtrate larger TSP, then entering to 4 gradessedimentation pool for sedimentation, then reter theclean pool and pumped for recycle.

�There isawastewater treatment system for treating thewater with coal content, collectingand treating wastewater from coal transmission and precipitation sytem after collection it will besent to sedimentation pool for sedimentation and then recycle.

�Wastewater of desulfurization will beused asash washing water after treatment.�After treatment, domestiswater will reenter into cyclepool and through pumping, it will be

sent to recycle for ash washing. After thesemeasures, wastewater will becompletely utilized andbesideash water, therewill beno other waster water will bedischarged.

Yangguang Power

Plant

Yangquan EPB

Continuous Table 6.1-1

78



Sound

environment

Noise

Boiler wind fan,supply wind fan, coalglinder, pump, turbine,generator and excitationmachine, noisestandard90-100cB(A)

Variouskinds of sound prevention, sound insulation and vibration reduction will beused toensure thenoisevaluesat east, west and south of theboundary of theplant under monitoring dayand night meeting thestandard of Category II from “Noise Standard for IndustrialBoundary”(GB12348-90), the noise value at north boundary of plant meeting the standard ofCategory IV from“Noise Standard for Industrial Boundary”(GB12348-90).

Ope

rari

on p

erio

d

Solid

wasteSlag

Major solid waste:coal ash, slad anddesulfurized gypsum

�Except slag cleaning system using slag division method, No. 1-4 boilers formerly usinghydro ash cleaning, after two steps of ash pumps, it will be sent to Yangpoguo Ash Yard which islocated to 7km away to the east of the plant. To realize the beter comprehensive utilization, theplant add dry attracting ash systems to No. 2,3 and 4 boiler.

�Boiler slag will be transported by trucks to No.3 valley slag field at the south of the plant.�The dry ash produced from the system will be sold to Shi-Tai Railway Project, Yangquan

Huatong Luqiao Group Cement Mixing Station, Yangquan Yamei Cement for comprehensiveutilization.

�Desulfurized sypsum will be sent to Yangquan Qingshan Cement Company to be realized ascement additive for comprehensive utilization.

YangguanPowerPlant

Yangquan EPB

79



Shanxi Provincial Environmental

Protection Bureau

Yangguan Municipal Environmental

Protection Bureau

Yangguang Power Plant and Contractor (s)

Top Environmental Administration

Routine Environmental Administration

Environmental Management

Implementation

Environment Office of World Bank

Shanxi Provincial Economy and Trade

Commission

Environmental Monitoring

Agency

Environmental Impact Assssment

AgencyConstruction

CompanyDesigning Agency

Environmental Protection Measures

Implementation

Figure 6.2-1 organization chart for environment during construction period

At the same time, to ensure the validity and equality of the environmental

management work, the specialized organization for environmental management has been set up by Yangguang Power Plant during the construction and the setup of the organization is shown in Table 6.2-1.

Table 6.2-1 Setup for organizational management organization

during the construction period Member appointment Number of people

Group leader 1 Monitor for environmental air 1

Monitor for noise 1 Monitor for waste water 1 Monitor for solid waste 1

Staff for complain hotline 1 Total 6

80



6.2.1.2 Organization for environmental management during operation

period Yangquan Municipal Environmental Protection Bureau is responsible for the

routine environmental administration. The Bureau enforces environmental laws, regulations and criteria, makes environmental protection rules and supervises the implementations. It gains information about engineering environment, sets environmental control goals ready for assessment, proposes control measures, and submits relevant issues to superior environmental and/or administrative authorities. Yangguang Power Plant is responsible for daily implementations.

Shanxi Provincial Environmental

Protection Bureau

Yangguan Municipal Environmental

Protection Bureau

Department of Power Industry

Yangguagn Power Plant

Top Environmental Administration

Routine Environmental Administration

Environmental Management

Implementation

Environmental Office of the World

Bank

Figure 6.2-2 Setup for organizational management organization during the operation period

In response to the requirements for environmental protection in the Power Plant, the company set up the leader’s group of environmental protection headed by the general manager himself. The chief engineer serves as the vice group leader, and the group members include the directors of relevant workshops. The leader’s group office is in the Department of Production and Technology. The chief engineer is responsible for overall environment management. A technological supervision network is set up at three levels of company, department and workshop (sections or groups). The Department of Production and Technology administrates the environmental protection technology all over the Power Plant, responsible for organizing, implementing and supervising daily environmental protection activities. There are 2 full-time inspectors of environmental protection technology, and in each workshop are affiliated environmental monitors.

As required by “Regulations on Administration of Environmental Monitoring in

Thermal Power Industry” and “Technical Specifications of Environmental Monitoring

81



in Thermal Power Industry”, Yangguang Power Plants has set up its Environmental Monitoring Station affiliated to the Department of Production and Technology, under technological supervision of superior environmental monitoring stations. This Environmental Monitoring Station has 3 technicians in the fields of environmental protection and analytical chemistry, etc, including 1 station director, and 2 monitoring staff.

Dept. fuel supply

Chengguang Company

Dept. Logistics

Dept. Production & Technol.

Dept. Power Generation

Workshop of Boiler and Turbine

Workshop of Electricity

Control

Workshop of Thermal Control

Workshop of Chemistry

Workshop of Coal

Transport

Workshop of Auxiliary

Boiler Work

Dept. Labor and Service

Coal Ash Company

Guangyuan Company

Environmental Monitoring

Station

Chief Engineer , Vice Group Leader

General Manager , Group Leader

Figure 6.2-3 Organization Chart of Environment Management in Yangguang Power Plant 6.2.2.1 During construction period

The environmental management group should make a detailed management plan according to the construction plan of the project and condust checking very often to the plan and make necessary renovation. The group leader should report the work to the leader of the project and report the result of checking to the environmental management regulary and put forward the solution targeting to the potential issues on environment from the checking. The monitors for air, waste water, noise and solid waste should carry out patrol for the checking of the implementation situation of the environmental protection measures during the construction according to the plan and be responsible for the arrangement of the monitoring points to implement the plan on time on place, and submit the reports for checking and monitoring and the management comments on site to the group leader.

The staff in charge of complain hotline should be in charge of the recording, filing and reporting of the complain calls to the group leader and issue the result of complaint to the public.

6.2.2.2 Operation period The management work for the proposed project during operation period will be responsible by Leading Group of Environmental Protection of Yangguan Power Plant, the members and their responsibilities are as follows:

82



�General Manager: General Manager is the top person in charge of environmental protection in the company, responsible for the overall environmental protection activities in the plant. He takes the obligation of environmental protection from the superior authority and the local government, which is included in his economic management contract for implementation.

�Chief Engineer: The chief engineer is in charge of coordinating the departments in environmental protection, production activities and management, etc, examining annual environmental protection plan and long-term planning, deciding and implementing technical plans of environmental control, and handling significant environmental accident or disputes.

�Deputy Chief Engineer: The deputy chief engineer assists the chief engineer in examining the annual environmental protection plan and long-term planning, deciding and implementing technical plans of environmental control, and handling significant environmental accident or disputes.

�Department of Production and Technology: This department is in charge of routine environmental monitoring and administration, supervising the operation of environmental facilities and monitoring activities, organizing the “environmental supervision network” within the plant, acknowledging the discharge of “three wastes” of the plant, proposing environmental protecting plans, and summarizing the environmental protection activates. It is also responsible for collecting environmental data and materials, conducting statistics and record keeping, submitting environmental report forms and statements, making pollution levy payment, participating in the examinations of environmental plan as well as the pre- and final checks of finished environment project. Other tasks include investigation and analysis of environmental accidents and environmental impact assessment, and the promotion of good experience and advanced technology in environmental protection.

�Environmental Monitoring Station: The Station is affiliated to the Department

of Production and Technology, conducting environmental monitoring in the plant by following the “Technical Specifications of Environmental Monitoring in Thermal Power Industry” to ensure monitoring quality. When the monitored data are found abnormal, the cause(s) is/are to be tracked and submitted to the superior department(s). It is in charge of collecting and analyze all the monitoring data and of keeping the monitoring records. It is responsible for maintenance and calibration of monitoring equipment to ensure the normal measuring operations. It also participates in the investigation of pollution incidents within the plant.

�Department of Power Generation: This department is responsible for boiler combustion analysis, the operation of oil-containing wastewater treatment facilities to keep the discharged water within the standard limits, the examinations of the devices for variation reduction and noise control. When finding problems it notifies the relevant workshop for repair. It is responsible for normal operation of desulfuration system, keeping water consumption in reasonable balance to ensuring 100% water recirculation and reuse.

�Electric Workshop: It maintains all the oil-filling equipment in the workshop, especially the leakage-likely devices such as transformers to prevent pollution. During maintenance and repairing period, it is responsible for proper handling of waste oil, liquid and other disposables in avoidance of excessive pollutant discharge.

83



�Thermal Control Workshop: It is responsible for strict and proper control over waste oil, liquid and other disposables in avoidance of excessive pollutant discharge during maintenance and repair period, and for DCS maintenance in desulfuration system.

�Boiler Workshop: It performs strict control over waste oil, liquid and other disposables in avoidance of excessive pollutant discharge during maintenance and repair period, for equipment noise control to keep the noise within allowable limits, for maintenance and repair of the oil system, for prevention of pollutions from oil-containing equipment such as auxiliary machines and oil coolers, for checking and maintenance of facilities for oil-containing water treatment, for control of ash-making and flue gas systems, and for preventing pollutions from the leakages of coal, powder, wind, ash and flue gas, etc.

�Boiler Axially Workshop: It performs strict and proper control over waste oil, liquid and other disposables in avoidance of excessive pollutant discharge during maintenance and repair period, for equipment noise control to keep the noise within allowable limits. The workshop is responsible for the checking and maintenance of oil-containing equipment to prevention oil leakage pollution from the auxiliary machines and oil coolers, etc. It is responsible for the control of ash-making and flue gas systems, and for preventing pollutions from the leakages of coal, powder, wind, ash and flue gas, etc, for the maintenance and repair of ash and slag removal systems to keep them in good condition, for the maintenance and repair of the mechanical and electrical parts of desulfuration system for normal operation. It is also responsible for ash and slag removal systems, for setting up the regulations on the operation of electrostatic precipitators, for controlling baghouse leakage to keep the particulate emission under standard limits and to prevent slag pollution to the environment.

�Coal Transport Workshop: It performs strict and proper control over waste oil, liquid and other disposables in avoidance of excessive pollutant discharge during maintenance and repair period. It is responsible for the maintainence and repair of environmental facilities within its scope of responsibility, especially the belt moisture-keeping devices, water-activating dust scrubber, baghouses, and spray in coal yard. It is also responsible for coal yard management including periodical water spray and prevention of fly ash and coal self combustion.

�Chemistry Workshop: It performs strict and proper control over waste oil, liquid and other disposables in avoidance of excessive pollutant discharge during maintenance and repair period. It is responsible for the normal operation of neutralization pool, refined neutralization pool, and water recovery pool, for monitoring water quality to ensure that the discharged and recovered water under standard limits. It is also responsible for fuel coal assay to ensure the ash and sulfur contents fitting the environmental standards, and for the assays related to desulfuration to ensure the desulfuration efficiency to meet the standards.

�Department and Logistics Management: It is responsible for domestic wastes management to ensure landfill to prevent secondary pollution, and for tree plantation and green area maintenance to develop the power plant into a park-like factory.

�Fuel Supply Department: It is responsible for supervising and management of coal transport and unloading, for making relevant regulations to prevent pollution from leaking and falling. It is responsible for oil transport and loading/unloading, for

84



making relevant regulations to prevent pollution from oil leakage. It is also responsible for coal quality management to ensure the ash and sulfur contents to satisfy the environmental protection requirements.

�Chengguang Company: The Company is responsible for the normal operation and maintenance of its environmental protection facilities. The Environmental Monitoring Station periodically submits forms and statements on environment protection, plans and summary documents. The Company performs strict and proper control over waste oil, liquid and other disposables in avoidance of excessive pollutant discharge during maintenance and repair period to prevent pollution accident.

�Department of Laboring and Service: It is responsible for the normal operation and maintenance of the facilities for wastewater treatment, for coal-transport water cleanup, for water quality monitoring, and for checking and maintaining ash pipes to prevent pollution from ash and water leakage. It is also responsible for the operation and management of ash and slag yard to prevent secondary pollution.

�Coal Ash Company: The Company is responsible for the operation and maintenance of dry ash devices to prevent particulate pollution, and for promoting coal ash comprehensive utilization to ensure the fulfillment of the contracted tasks.

�Guangyuang Industry and Trade Company: The Company is responsible for the proper control over the wastes generated during equipment maintenance and repairing period, to avoid of pollution dispute due to improper handling of wastes disposals.

�The Training Center is responsible for staff training in environmental protection knowledge and the promotion of environmental awareness.

�The Labor Union is responsible for dissemination and popularity of environmental protection information and knowledge.

6.2.3 Environmental management plan 6.2.3.1 Prophase of the project The major environmental protection work during the period of feasibility study report is the appraisal to environmental impact, and the measurements for the implementation of environmental protection issued in the EIA and reduce the unfavorable environmental potential impace caused by the project for the EIA unit, design unit and construction to discuss together and compiling of the environmental management plan.

6.2.3.2 Construction period

During the construction period, the environmental protection is the main responsibility for the contractors, in the processes of the construction, completion and making supplementary actions, the tractors should: to take all the reasonable steps to protect the site and the environment around it to avoid the damages or holdback of the people or finance of the public caused from the pollution, noise and the result of the construction.

85



�Control of air environment a.During the construction, the clean implementation construction should be

conducted, the measures fro protection of dust pollution should be planned andalso other measures of establishment of baffle, water spraying and covering of the transportation trucks according to the construction plan.

b.Regular checking to the construction site. c.Taking administration actions or fine to those not implement according to the

regulation and after founding of the problems but not take on time modification or correction.

�Control of noise environment a.Using advanced and low-noise construction process to replace the high-noisy

construction process. b.Making a reasonable arrangement of the construction and time to avoid the

construction work affecting the residents around the site. �Control of water environment The waste water during the construction period is mainly produced from the life

of construction workers and a small amount of construction waste water produced from construction site. All the workers live in the dormitory in the plant and the domestic water produced will be transmitted into domestic water treatment station for treatment. The waste water produced from the construction has some content of suspended matter and this kind of water will be re-used for the mixing of material after sedimentation.

�Control of solid waste a.The building waste will be made treatment according to the departments

concerned and small amount of domestic waste produced from the construction workers will be collected by the cleaning workers together with the domestic waste of the staff of the plant and to be transported to the appointed landfill for treatment.

b. The waste steam seals replaced from the transformation project of steam seal are mainlycomposed with alloy materials as iron, manganese and chrome, they can be storage in the waste warehouse of the plant and than they should be made a reasonable utilization.

�Control of ecological environment This transformation project on energy saving will be implemented within the

existing boundary of the plant and the range of construction is very small not necessary for new land requisition nor concerning any ecological environmental issue.

�Ensuring the social environment This transformation project on energy saving has no any issue concerning new

land requisition and resettlement and it will not bring any unfavorable impact to social environment. 6.2.3.3 Operation period

86



During the operation period, the emission condition of various major pollutants should be monitored regulary to ensure the emission of various pollutants are meeting the emission standard and to have a good control for the changing trend of the environmental quality surrounding the plant area at any moment.

�The enterprise should improve the environmental management relationship of the whole plant according to the environmental auditing requirement and carry out the environmental management of the enterprise very well. At the same time, it has to develop regular environmental auditing and continuous improvement of the environmental management standard of the enterprise.

�The environmental management plan should be established, implemented and monitored and detailed monitoring andcontrol system for air, waste water and major pollutants should be set up to ensure the ontime understanding and controlto the emission of pollutants and their impacts to the surrounding environment.

�The operation management of environmental protection equipment should be strengthened to ensure the normal operation and efficient treatment for them and ensure the various emissions of pollutants are meeting the standard.

�To define the responsibility of environmental monitoring and establish the complete regulations and system for the whole plant, to conduct daily monitoring for the major pollution sources and pollutans of the enterprise and compile table and report to submit to the higher departments concerned, to establish monitoring files, to participant in the treatment work and serve for the pollution treatment, to conduct scientific study for environmental monitoring and increasingly raise the monitoring standard.

�To strengthen the education on safety and environmental protection for the staff to implement all the labor protection measures to raise the security and environmental protection concept of the workers to ensure the safety and health of the workers.

�To carry out the matured and effective risk-proof measures, establish accident emergency reaction plan, strictly control the alarm measure, prevent or reduce the accidents, personal damage and the occurance of environmental pollution.

�Based on the industrial characteristic of the enterprise and the environmental impacts that could be caused, to strengthen the communicationwith the local society and make public on the general summary, measure for energy saving and pollutants emission regulary.

The environmental management plan of the project is shown in Table 6.2-2

Table 6.2-2 Environmental management plan period Main contents of environmental management

Prophase of project

(1)To authorize the qualified unit of environmental impact appraisal to conduct EIA report.

(2) To coordinate with design and EIA unit for environmental work Construction (1) According to the requirements from EIA, to make out measures for

87



period pollution protection during construction period and let them reflect in the contract. (2) Construction unit and monitoring unit should monitor the implementation condition of pollution prevention and control during the construction, whenever, finding out the problem, correction be made to ensure the implementation of pollution prevention and control (3) Training program should be made to train the workers and technicians newly recruited before going to work.

Production and

operation period

(1) To strictly carry out the environmental management system to ensure the smooth operation of environmental management work. (2) To conduct monitoring according to environmental monitoring plan, whenever, finding out the problems, they should be solved in time. (3) Training and eduction to the related personnel should be carried out according to the environmental protection policies to ensure the enterprise can meet the need of the new situation and requirement.

6.2.4 Management for contractor

During the construction period, the contractor will play an important part in the environment management, pollution control and implementation of prevention and control measures. Therefore, the following requirements are requested for contractor:

�The contractor with real power should be selected to ensure the valid implementation of environment management plan.

�The contract and construction monitor are requested to be trained on environmental protection and environmental management before the starting of the construction.

�The above mentioned measures for the reduction of the environmental impact caused by the construction should be included in the bidding document and in the final construction document as the requirement to the contractor of the project.

�The contractor is requested to make a record to the environmental activities of it and provide the record on environmental performance everyday or every week once time. PMO and implementation monitoring group will review and verify these records.

�The contract is requested to assign full time staff for environment at each subproject. They should be trained to be qualified for their work.

�During the construction period, the contractor should communicate and negotiate with the local people and issue the detailed construction activities and time to the public, and provide the contact person and phone number at the same time for the convenience of making complain and providing suggestions by the public on the construction.

6.3 Environmental monitoring plan 6.3.1 Monitoring goals

88



Environmental monitoring includes the construction period and operation period, targeting to have a good control on project pollution situation, the changing conditions to the environmental quality caused by the project, their range and the dynamic situation of environmental quality during the operation to provide feedback information to the administration bureau and scientific foundation for environment management.

6.3.2 Monitoring plan 6.3.2.1 Monitoring plan during construction period

During the construction period and according to the characteristic of pollution and the actual condition, a kind of monitoring system should be set up and the implementation of it be guranteed. The monitoring plan should be carried out according to the current state, ministrial standards and related regulations.

This transformation project on energy saving has very small volume in construction and no waste water will be discharged. The environmental monitoring plan of construction period is shown in Table 6.3-1 6.3.2.2 Environmental monitoring plan during operation period Yangquan EPB and environmental monitoring station of the plant are in responsible for carrying out the environmental monitoring plan for Yangguang Power Plant together and at the same time, flue gas online monitoring system is installed on No.1-4 boilers. The environmental monitoring plan for operation period is shown in Table 6.3-2.

89



Table6.3-1 A detailed list for environmental monitoring during construction period for Yangguang Power Plant

No.Environm

entalfactor

Monitoring point Monitoring item Monitoring frequency Entruste

d by

Monitoring

and

measuring

unid

Monitoring

unit

Cost

(10,000

yuan/y)

1 Environmental air

Near construction site,office area TSP 1/month, 2days/period 0.8

2 NoiseWithin boundary and 1m

outsideboundary ofconstruction site

Leq 1/month, 1 day-night/period 0.1

3 Solidwaste Construction site

Name, production volumeof solid wasteand theirtreatment way

Each month once

Yangguang

PowerPlant

YangquanEPB andYangquanEnvironmentalMonitoring station 0.1

Table 6.3-2 A detailed list for environmental monitoring plan for operation period for Yangguan Power Plant

No.Environm

entalfactor

Monitoring point Monitoring item Monitoring frequency Entruste

d by

Monitoring

and

measuring

unid

Monitoring

unit

Cost

(10,000

yuan/y)

Regular monitoring by Yangquan Environmental Monitoring Station1 Wastegas Chimney SO2 soot NO2 1/y, 1/ period 2.0

2 Wastewater

Waterspout of ash waterin ash yard pH COD SS fluoride 1/y, 2days/ period

Yangguan

PowerPl

YangquanEPB and

YangquanE i

1.0

90



3 Noise 1m outside boundary ofplant Leq 1 period/year, 1 in day and

night/ year

Plant Environmental

Monitoring station

0.1

Monitored by Monitoring Station of the Plant

Chimney SO2 soot,NO2 Continuousmonitoring

Continuousmonitoring byEL3020 flue gasonline

10.0

1Wastegas

Wastewater Each in coal field, coal

grinder, coal supplier, andbelt conveyer

Coal powder (ash) 1/season, 2days/period, 2 /day 2.0

2 NoiseWaterspout of ash water

in ash yard, monitoring onrecycle water quality

pH SS COD oils fluoride sulfide

2 periods/year, 2 days/ period1-2 times /mongh for recycle

water2.0

3 Wastegas 1m outside boundary,office area Leq 1 period/ 6 months, 1 in day-1

in night/ period 0.2

4 Solidwaste Within the plant

Nameand productionvolume of solid wasteandtheir treatment

Onceeach month

Yangguang

PowerPlant

EnvironmentalMonitoring Stationof Plant,YangquanEPB

0.5

92



7 Public participation 7.1 The goal for public participation Public participation is one important component of the environmental impact appraisal, the goal is to introduce the contents and characteristic of the project to the public those may be affected by the project and ask the suggestion and conments by the public, regarding these as the important public comments for the feasibility study report of the project. Through the public participation, it is favorable for understanding the benefit and requests from different fields, solving the social problems caused by the negative impacet in advance and support a good foundation for the smooth implementation of the process of the project by various sectors.

7.2 Public participation and the method

The survey for public participation used the distribution of questionnaire as the main method and conduting meeting as supplementary and interview with some individual. According to the document No.2006-28 “Temporary method on public participation for environmental impact appraisal” issued by State Environmental Protection General Bureau, the information release was done for the project. Through the above method, the suggestions, comments and requirements from the different social sectors and social organization on the project have been collected.

The public participation activities have been done twice. The first time was on August 1 to 10 in 2007 (after the completion of EIA draft), through the publication of notice at the affected areas by the project, conducting survey, holding meeting and distribution of questionnaire and so on, the summary of the project, the environmental impact it may produce were known by the broad mass and the comments been collected. The second time was on October 24 to November 8 in 2997 (after the completion of EIA, Environmental Auditing Report and Environmental Management Plan draft). This time it used the notification on the net and newspaper together, telling the major contents and summary of EIA, Envorinmental Auditing Report and Environmental Management Plan to the public and also collecting the comments on the project.

7.3 The first time on public participation

The first time public participation was conducted from August 1 to 10 in 2007 forcusing in the distribution of questionnaire, holding of meeting and notification on internet.

7.3.1 Contents of public participation

(1)Distribution of questionnaire During this time of public participation, 100 copies of questionnaire were

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distributed forcusing on the residents, orginations, worker union representative and representatives from People’s Congress, and Political Consultative Association from Xiaonanao Village, Nanao Village, Guanzhuan Village, Changjiaguo Village which are close to the project area.

This time of public participation, 100 copies of questionnaire were distributed and collected back 95 copies with a rate of 95%. The components of the targeting people for this survey are listed in Table 7.3-1.

Table 7.3-1 Statistic Table for the structure of the surveying targets for public participation

gender Cultural background Occupation Age

itemM F Pr

imar

ysc

hool

Mid

dle

scho

ol Hig

hsc

hool

Juni

orco

llege

and

abov

e

farm

ers

card

res

othe

rs

30an

dun

der

30-5

0

50an

dab

ove

Number ofpeople

68

27

23

32

43

63

84

71

05 74 16

(%)

71.6 28.4 2.1 34.7 25.3 37.9 40 49.5 10.5 5.3 77.9 16.8

(2) Meeting

A meeting was organized by Yangguan Power Plant on Auguse 6, 2007 on the issue of public participation, including the participants of representatives, teachers, officials and representatives from People’s Congress and Political Consultative Conference from the nearby.

(3)Publicity of the information Publicity was done on the official net of Yangquan City website by Yangguan

Power Plant. The period: From August 1-10, 2007. The contents of publicity: summary of the transformation project, summary on the environmental impact it may cause, the ranges and major items requiring the comments from the public, the detailed mode of collecition for public comment, the deadline for the collection of the public comments. The detailed information is listed in Figure 7.3-1.

7.3.2 The results of public participation and survey

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During the period of publicity, the construction and appraisal unit did not receive any feedback by public.

The result of statistic is shown in Table 7.3-2. (1)Concerning the local environmental quality, almost 1/3 (31.6%) of the public

thought it was relatively good, 43.1% thought it was just so so, and 25.3% thought it was really bad. Most of the peiole (86.3%) thought that Yanagguang Power Plant should carry out further implementation measure to control the pollution of waste gas, and those thought it was necessary to further control the pollution on waste water and noise were 6.3% and 7.4% respectively.

(2)When asking the knowledge of the project, most of the people (77.9%) knew it, but not clearly, among those 28.4% had a better understanding, 48.5% just haerd about the project and at the same time 22.1% had not any knowledge about it. Most of the people (92.6%) agreed on the project and actively supported the construction of the project, no one objected it, but a few (7.4%) thought they didn’t care about it and the construction of the project had do nothing with them. Conerning the issue how to participate in the implementation and management, more than half of the people (57.9%) would like to participate in through the mode of publicity and coordination, almost one third (31.6%) expressed to be actively involved in it, very few (2 persons) wanted to participate in the project through the technical support and implementation of project, those not to participate in were 8.4%.

7.3-1

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Table 7.3-2 Statistics of the result of public participation Result Issue Choice

Person (%) 1.How do you think about the local environmental quality?

A Preferably B General C Very bad

30 41 24

31.6 43.1 25.3

2.In what area Yangguan should take further action to control pollution?

A Waste gas B Waste water C Noise

82 67

86.3 6.3 7.4

3.Do you know this project? A Yes B No

74 21

77.9 22.1

4.How much do you know about the project?

A Relative understanding B Just heard C Nothing

27 47 21

28.4 49.5 22.1

5.Your understanding on the implementation of the project:

A. Energy saving emission reduction

B Envoronmental improvement

C Increase economic benefit D Promotion of sustainable

development

55 26 410

57.9 27.4 4.2 10.5

6.The benefit you think that project will bring for you is

A Improvement of environmental quality

B Increase income C No good D No idea

83 336

87.4 3.2 3.2 6.3

7.How do you like to participate in project implementation and management?

A Actively participate in B Publicity, coordination C Technical support D No participation

30 55 28

31.6 57.9 2.1 8.4

8.Your attitude to the project? A Agree B Reject C Not care

88 07

92.6 0

7.4

9. Your comments:

A To implement it as fast as possible

B Increase technical training, realize energy saving and emission reduction

57 11

27

60.0 11.6

28.4

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C Improve project management, actually improve environmental quality

(3) For the significance of the implementation of the project, more than half of the people (57.9%) regarded that it could save energy and reduce emission after the implementation of the project, 27.4% people thought that it could improve environment, those who thought that the implementation of project could be significant to the promotion of sustainable development and who thought it could help increase the economic benefits were 10.5% and 4.2% respectively. For the benefit brought by the implementation of the project, most of them (87.4%) thought that after the implementation of the project, it could improve environmental quality, those who thought that it could increase income and who thought that it could do nothing were 3.2% the same. At the same time, 6.3% of the people didn’t have idea if the project could bring them any benefit or not.

(4) During the survey process, 60% of the people who had been participated in hoped to implement the project as fast as possible, to realize energy saving and emission reduction and to improve the environmental quality; 11.6% and 28.4% of people suggested that Yangguan Power Plant strengthen technical training and project management to actually realize energy saving and emission reduction and improve environment really.

During the individual interview and holding meeting, most of the people actively expressed their support to the construction of the project and hoped that it could realize energy saving and emission reduction quickly to play an important role to the improvement of environmental quality. At the same time they did propose that: (1)the enterprise should carry out the pollution protection and control measure required by EIA, and reduce the environmental pollution during the construction to the lowest standard. (2)Yangguan Power Plant should pay great attention to the technical training and project management and realize the goal of energy saving and emission reduction according to the target of the project and greatly improve the local environmental quality. 7.3.3 Feedback and response to the comments from public participation

The unit in charge of process the appraisal has summed up the comments from the survey of public participation and provided the feedback to the construction unit and tried to realize them.

(1)For the proposal that enterprise should strictly carry out the environmental protection measures required by the unit of EIA process, the enterprise had already paid a full consideration to them during the design and construction to try to control the pollution into the lowest level and to protect environment well.

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(2)The power plant also expressed that they were going to organize the related people to visit the production enterprises and the enterprises who had successfully achieved the transformation to study and survey and to conduct technical training to the related people according to the plan to ensure the smooth implementation, realiz the energy savingm, emission reduction and improve environmental quality.

7.4 The second time public participation

The second time public participation was held on October 24 2007 and November 9 2007 respectively using the publicity on the net and newspaper.

Yangguan Power Plant published in Yangquan Government Website (www.yq.gov.cn) and Yangquan Daily the second notification. The time period: Octobe 24, 2007 and November 9 2007. Content: The major contents and summary, the range of public comment collection and major items and the detailed forms of asking for the public comments of Environmental Impact Report of the Project, Environmental Auditing Report and Environment Management Plan. The details shows in Figure 7.4-1 and 7.4-2.

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Figure 7.4-1 2nd public participation and photos published on net

Figure 7.4-2 2nd public participation and photos published on Yangquan Daily

7.5 Exposure of information

The distribution of the information of the project for public participation is shown in Table 7.5-1

Table 7.5-1 Exposure of information Content Date of exposure Mode Targets Requirements

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for operation Project summary

and meeting on public participation

August 6 2007 meeting Resident

around OP4.01

Project summary and questionnaire

August 1-10, 2007

Distribution of

questionnaire and issue on net

All citizens

OP4.01

October 24, 2007 Issue on net EIA,

Environmental Auditing Report and Environmental Management Plan draft

November 9 2007 Yangquan Daily

All citizens

OP4.01

7.6 Summary

From the public survey we can learn that most of the people have already had some understanding to the contents of the project construction and basic knowledge about the result after implementation of energy saving and emission reduction and the function of transformation to environmental quality, and most of them expressed their full support to the construction of the project.

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8 Summary and suggestion 8.1 Summary

� Summary of existing project Located in the boundary of Pingding County, Yangquan City, Shanxi Provnce,

Shanxi Yangguang Power Plant is 4 km away from the county seat. Yangguang Power Plant operates coal-combustion vapor condensing turbine power generating units with total capacity of 4×300MW, and these generator units were consecutively put into production from December 1996 to November 27, 1999. The plant covers an area of about 39 ha. and there are 1542 staff and workers in the plant now.

Limestone-gypsum desulfuration is used for the four power generating units, and the flue gas desulfuration rate is 90%. Boiler 1 and 3 are equipped with electrostatic preceptors with the dust removal efficiency of 99%, and Boiler 2and 4 are equipped with baghouses with dust removal efficiency of 99.9%. The concentration of emissions of soot and SO2 all meet the standards of III Period from The Standard of Pollutant Emission to Air by Thermal Power Plant (GB13223-2003). The industrial waste water, cycling water waster water, acid waste water, water discharge from coal conveying system, domestic water and waste water from delsulfurization are reused after the treatment; the ash water is discharged into Nangchuan River and major pollutants all meet the Grade Standard from The Standard of Waste Water Discharge (GB8987-1996). The slag from boiler is used for comprehensive utilization and the residual part is sent to slag yard for storage, the gypsum after desulfurization is comprehensively used. The noise source after the measurement of noise reduction, sound isolation and vibration reduction can meet the standard of

The Standard of Noise within the Boundary of the Enterprise (GB12348-90). � Analysis of feasibility of transformation project on energy saving As the completion and putting into operation of desufurization system and

transformation of precipitator of Yangguang Power Plant and the increase of the power consumption rotating equipment, it is estimated the power utilization rate will increase about 1.5% and coal consumption will also increase about 3.4/kwh which will result in the increase of energy consumption and bring some impact to the economic operation of the power plant. To overcome these impacts which bring side impact to the economic operation of the power plant, the plant should increase the investment on energy saving to reduce the energy consumption.

The transformation project on energy saving of Yangguang Power Plant includes four sub-projects: transformation project of frequency conversion of primary fan for No. 1 boiler, installation of online monitoring system on coal powder pipe for No.4 bilier, transformation project of steam seal for No.4 turbine group and the development of anti-balance coal consumption calculation software for the whole plant which will be completed at the end of 2008. After the implementation of the project, the benefit of 5.628 million yuan will be achieved, and 18760 tons of standard

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coal be saved, reduction of emission for soot, SO2 NOX and CO2 and improvement

of environmental quality will be achieved. The project is in accordance with the regulated contents from “The Decision on

Implementation of Scientific Outlook on Development and Strengthening the Environmental Protection”, “The Decision on Strengthening the Energy Saving” and “The Notice on the Publishment and Issue of Comprehensive Working Plan on Energy Saving and Emission Reduction”.

This project on energy saving belongs to the Article 34: “Technical Development, Application and Equipment Manufacture on Energy, Water Saving, Environmental Protection and Comprehensive Utilization of Resources” from “26: Environmental Protection and Saving Resources and Comprehensive Utilization” from the Encoraged Category No. 1 Item from “Guiding Contents for Industrial Structure Readjustment”(2005 Version), therefore, this project belongs to encouraged citatory and the construction of the project is feasible.

� Current Situation of Environmental Quality

Current Situation of Environmental Air Quality

TSP PM10 and SO2 in the project area have different situations of overstaking

the standard, and the greatest multiple of overtaking of TSP PM10 and SO2 are

1.37, 2.91 and 4.45, NO2 can meet the standard of the second grade from “Standard of Environmental Air Quality” (GB3095-1996). The major reason for serious pollution is caused from the natural environment and weather condition, dust from transportation, domestic pollution and also the industrial pollution is the most important factor, the high degree of SO2 pollution is contributed by the local con-combustion thermal power plants.

Current Situation of Surface Water Environmental Quality

The closest surface water system is Nanchuan River and the monitoring result shows that the water parameters as pH, BOD5, oils, cyanide, volatilizated benzene, sulfide and fluoride are all meeting the water standard of “Standard of Surface Water Environmental Quality”(GB3838-200). Since the domestic water of the county merges into Nanchuan River at the S3 Section, causing the increase of section flow in S3, then COD shows exceeding the standard at the section S3. Because of the discharging of the waste water from paper mills at the two banks of the river and the domestic waster from the county into Nanchuan River, ammonia nitrogen at three sections shows overtaking the standard especially at the section of S3 the overtaking situation is the most serious with the largest multiple as 8.0.

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Current Situation of Underground Water Environmental Quality

The monitoring results show that all the indexes are matching the standard of category III water quality from “The Standard of Underground Water Quality” except the total hardness and sulfate in No.2 well. The standard-exceeding of hardness and sulfate are related with the local geographical conditions.

Current Situation of Sound Environmental Quality

Monitoring results show that the noise at day and night monitoring values are meeting the standard of “the Standard of Noise for Industrial Boundary”(GB12348-90). The monitoring value at day and night in Xiaonanao near the plant meets the second category of the “Standard of Urban Region Environmental Noise” and the sound environmental quality in the site of plant is of good quality. According to the analysis above, the parameters for air pollution at the project

area have different situation of standard-exceeding and the project is targeting for the energy saving and emission reduction. After the implementation of the project, the environmental air quality at the project area will be improved to some extent.

� Analysis of environmental impact and the prevention and control of the pollutants.

�Analysis of environmental impace and the prevention and control of pollutants during the construction period.

a. Environmental air The transformation project of frequence conversion of primary fan on No.1 Boiler: during the construction of the control room, some amount of dust will be produced but only a very small amount and through the measures taken during the construction period to strengthen the management of building materials and construction, the production of dust can be reduced. During the process of the installation of online monitoring system on coal powder pipe for No. 4 boiler, transformation of steam seals of No.4 turbine group, and the construction of the development of anti-balance coal consumption calculation of software for the whole plant, small amount of soot will be produced from welding but still with a small amount and it can be improved through the strengthening of ventilation at the construction site. b. Water environment The construction of the control room of transformation project of frequency conversion of primary fan for No. 1 boiler will produce small amount of waste water during the process but with a small amount and it can be reused for material mixing after the sedimentation.

During the construction the workers will live in the dormitory of the plant and the domestic water produced by them will be collected and reused after the treatment.

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c. Sound environment The construction of control room of the transformation project of frequency conversion of primary fan for No.1 boiler will produce 60-70B(A) noise by the machine and equipment; the installation of online monitoring system on coal powder pipe for No.4 boiler, transformation of steam seal for No. 4 turbine group and the construction of the development of anti-balance coal consumption calculation software for the whole plant will produce 50-60 B(B) noise by construction machines; through the selection of low-noise equipment and reasonable construction, the production of construction noise can be reduced. d. Solid waste The construction of the control for the transformation of frequency conversion of primary fan on No. boiler will produce some amount of construction waste during the process, but the amount is limited and they can be treated together with the domestic waste of the plant.

During the process of the transformation of steam seals, 78 rings of waste seals will be replaced and they are made of the alloy materials as iron, manganese and chrome, which can be sold out as waste. The construction workers living in the dormitory in the plant will produce very small amount of domestic waste which can be transported to the appointed landfill for treatment together with the domestic produced from the staff.

Discribed as above, the project of energy saving has only a little amount of engineering and all the construction contents will be done in the boundary of the plant, causing very little impacts to the environment and they are temporary and reversible. Therefore, the construction period of the project will not bring obvious side impacts to the surrounding environment during the construction period.

�Analysis of environmental impace during operation period and the prevention and control to the pollution

a. Environmental air This transformation project on energy saving during the operation will not bring

any unfavorable impact to the environmental air but also it will reduce the pollutant emission and improve the local environmental air quality to some extent. b. Analysis to water environmental impact No waste water will be produced during the operation period of the project and no unfavorable impact will be produced to water environment. c. Analysis of sound environmental impact The radial flow fan in frequency conversion controller for the function of cooling will produce 60dB(A) noise during the operation period of the transformation project of frequency conversion of primary fan on No.1 boiler. Through the noise-isolation of the control, the noise value can reduce about 20dB(A).

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The steam seal after the transformation of No.4 turbine groups, will produce vibration noise during the process of turbine running but since the clearance after transformation is very small, the noise value after the transformation will not increase. The plant has also adopted the installation of sound-isolation cover and workshop sound-proof measures to reduce the noise for the generator.

The noise produced by this transformation project during operation period will not be large and since the project is in the workshop of the plant, a little far from the plant boundary and application of related prevention measure, it will not produce any impact to the nearest Xiaonanao Village.

d. Solid Waste No solid waste will be produced during the operation period of the transformation project and not unfavorable impact will be produced to surrounding environment. Described as above, the transformation project during the operation perios will not produce any unfavorable impact to the surrounding environment basically and it can reduce the pollution emission and improve the environmental quality to some extent.

Analysis of social environmental impact

No land requisition or resettlement is needed for this transformation project and it will not produce any unfavorable impact to social environment. However, through the reduction of pollutant emission and improvement of regional environmental quality, it will be favorable for the local public to improve their health standard.

� Analysis of environmental positive impace of energy saving and emission reduction

After the implementation of four energy saving sub-projects, the plant can sve 18760 tons of standard coal annually, and reduce the production of 6922t/a�732t/a�170t/a and 49939t/a for soot, SO2�NOX and CO2 respectively and reduce the emission of 6.9t/a�73.2t/a�170t/a and 49939t/a for soot, SO2�NOX and CO2

respectively which will be favorable for the improvement of surrounding environmental aie quality for the power plant.

� Comparison and selection of plans

Zero plan analysis: If no implementation of the transformation project on energy saving for Yangguang Power Plant, the energy consumption of the whole plant will continue to increase and the pollutant emission will also increase at the same time. If the plant implements the transformation project on energy saving, after the implementation of the project, it will save 18760 tons of standard coal annually,

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reduce the emission of soot, SO2 NOX and CO2, achieving the goals of energy

saving, emission reduction and improvement of the regional environment. Alternative plan analysis: Through the comparison and selection of the

transformation projects on their economy, technical level and energy saving efficiency, the following plan has been decided as the best plan: Transformation project for frequency conversion on primary fan on No.2 boiler, installation of online monitoring system on coal powder pipe for No.4 boiler, the steam seals of No. 4 turbine group into contact type steam seal (ferrite) and the development of anti-balance coal consumption calculation software for the whole plant.

� Environmental management and monitoring plan

Since the putting into operation in 1999 until now, Yangguang Power Plant has developed a completed system of environmental management system from top to bottom, compiling out “Environmental Management System” with a high level of environmental management. To provide a convenient management for environment in the whole plant, this transformation project will be included into the existing environmental management system for implementation. During the construction and operation of the project, the regulated, scientific environmental management and monitoiring should by carried out to the project, and the environmental monitoring plan for operation period will be strictly implemented to realize verioud measures for environmental protection and traning to the related staff will be done.

� Public participation

The public participation of the project has fully expressed the idea of “People First”. Public participations were conducted two times, the survey used the form of distribution of questionnaire and holding meeting with the people and individual interview, and the form of notification on net. The focus for the survey was put on the villages located near the project, they are Xiaonanao Village, Nanao Village, Guanzhuan Village and Changjiazhuan Villate and the residents and schools, organization, representatives from workers’ union, representatives from People’s Congress and Political Consultative Conference. 100 copies of questionnaire were distributed and collected back 95 copies with a recover rate of 95%. For the benefits brought by the project, most of the people (84.7%) thought that it could improve environmental quality after the implementation of the project. For the significance of the implementation of the project, more than half of the people (57.9%) regarded that the project could save energy and reduce emissiona after the implementation of the project.

� General Summary

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As memtioned above, this project belongs to energy saving and emission reduction project, including transformation of frequency conversion on primary fan of No. boiler, installation of online monitoring system on coal powder pipe on No. 4 boiler, transformation of steam seal on No.4 turbine and the development of anti-balance coal consumption calculation software for the whole plant totally four sub-projects. During the construction process, the engineering volume is very small and the construction contents will be done in the existing area of the plant with small impact to the environment; During the operation period, it will no produce side impact to envornmnent around it and through the implementation of the project, it can achieve an energy saving and emission reduction benefit, therefore, reduce the emission amount of soot, SO2, NOx and CO2 and improve the local environment. It is of social and environmental benefits and of significant meaning for the transformation of energy saving for thermal plants.

Therefore, the project is feasible from the point of environmental protection.

8.2 Suggestions: �During the process of construction, the strict regulations on environmental

protection should be carried out and strictly follow the various measures required by the design.

�The contents regulated in Environmental management plan and environmental monitoring plan should be strictly implemented.

�After the implementation of the project, the environmental benefit is obvious and the measures for environmental protection are dable and it will be favorable for the improvement of local environmental quality. Therefore, it should be implemented as soon as possible.

Appendix: Calculation formulas for energy saving and emission reduction

�Calculation of standard coal

WBB ×=

In the equation B volume of standard coal saved (t/a)

B per unit whole plant reduced volume of coal

consumption for power generation (g/kwh)

W per unit whole plant power volume annually produced

(kwh/a) on each group 2×109kwh/a whole plant 8×109kwh/a

According to above calculation, after the completion of transformation, it can

save 18760 tons of standard coal annually.

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�Calculation of economic benefit

CBJ ×=

In the equation J economic benefit (yuan/a)

C price of standard coal (yuan/t)as 300 yuan/tAccording to above calculation, after the completion of transformation, it can

achieve 5.628 million yuan of benefit annually.

�Calculaltion on reduction volume of pollutant production

�Conversion of coal consumption

Conversion and calculation has been done based on annual actual coal quality

(Table 2.1-2) of Yangguang Power Plant during 2005-2006.

Q

QBB ×=

In the equation B actual coal volume saved(t/a)

B standard coal volume saved (t/a)

Q heat value of standard coal (kJ/kg)as 29308kJ/kg

Q actual coal quality heat value(kJ/kg)as 22180kJ/kg

�Production volume of soot

FQ

qABG ar ××+×=339134

In the equation G soot production volume (t/a)

Aar ash content as 30.24%

q4 loss by not completed combustedas 1.2%

F quota of flying ash as 0.9%

�SO2 production volume

42 19.02 qSBGso −××××=

In the equation GSO2 SO2 production volume (t/a)

S sulfur as 1.66%

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�NOX production volume

1KBGXNO ×=

In the equation GNOX NOX production volume (t/a)

K1 pollution emission coefficient (kg/t ) as 9.08kg/t

�CO2 production volume

22KBGCO ×=

In the equation GCO2 CO2 production volume (t/a)

K2 pollution emission coefficient (t/t ) 2.662t/t

According to the above calculation, after the completion of the transformation, it can

reduce the emission of 6922t/a732t/a 170t/a and 49939t/a for soot, SO2 NOX

and CO2.

�Calculation of reduction of pollutant emission

�soot emission volume

η−×= 1’ GG

In the equation G soot emission volume (t/a)

dust removal efficiency as 99.9%

�SO2 emission volume

2

1’ 22 soGsoGso η−××=

In the equation GSO2 SO2 emission volume(t/a)

SO2 desulfurization efficiency as 90%

According to the above calculation, after the completion of the transformation project,

it will reduce the emission of 6.9t/a73.2t/a 170t/a and 49939t/a for soot,

SO2 NOX and CO2.

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