shanxi yangguang power generation co., ltd....

Shanxi Yangguang Power Generation Co., Ltd.

Compliance Evaluation Report of

Environmental Management Plan (EMP) and

Environmental Auditing Report (EAR)

&

Supplemental EMP for Energy Conservation

Rehabilitation Project of #2 Boiler

Owner: Shanxi Yangguang Power Generation Co., Ltd.

Prepared by: China Institute for Radiation Protection

March 2012

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wb406484

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E1786 v16

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Project Name

Compliance Evaluation Report of Environmental Management Plan

(EMP) and Environmental Auditing Report & Supplemental EMP for

Energy Conservation Rehabilitation Project of #2 Boiler of Yangguang

Power Plant

Contractor China Institute for Radiation Protection

Project Manager Shi Xuefeng (Registration No.: A13020151300)

Project Verifier Zhang Jianxin (Registration No.: A13020020400)

Project Approver Ma Hongyou (Registration No.: A13020110400)

CONTENTS

1 Preface

1.1 Project Background and Progress ·························································· 4

1.2 Preparation Basis ············································································· 4

1.3 Execution Standard ··········································································· 6

2 Compliance Evaluation Report of Original EMP and EAR

2.1 Compliance of Original EMP ······························································· 8

2.2 Compliance of EAR ········································································· 18

2.3 Sum ···························································································· 18

3 Denitration, Demercuration and Proposed Environmental Protection Measures

during Recent Period

3.1 NOx Pollution Prevention and Control ··················································· 20

3.2 Heavy Metal (Mercury) Pollution Prevention and Control ···························· 20

3.3 Proposed Environmental Protection Measures ·········································· 21

4 Occupational Health and Safety

4.1 Occupational Health Rules ································································· 23

4.2 Occupational health management plan ··················································· 23

4.3 Implementation and Corrective Measures Concerning Occupational Sanitation

Control ····························································································· 29

4.4 Sum ···························································································· 29

5 Environmental Risk Mitigation Measures and EMP for Rehabilitation Project

of #2 Boiler

5.1 Profile of High-voltage Variable Frequency Speed Control System Project of

#2 Boiler ··························································································· 31

5.2 Environmental Risk Mitigation Measures during Construction Period,

EMP and Environmental Impact Analysis ···················································· 31

5.3 Environmental Risk Mitigation Measures and EMP during Operation Period ····· 33

6 Conclusion ········································································ 37

Compliance Evaluation Report of Environmental Management Plan (EMP) and Environmental Auditing Report &

Supplemental EMP for Energy Conservation Rehabilitation Project of #2 Boiler of Yangguang Power Plant

4

1. Preface

This report is formulated on the basis of Environmental Management Plan (EMP) for

Energy Conservation Rehabilitation Project of Yangguang Power Plant,

Environmental Impact Evaluation for Energy Conservation Rehabilitation Project of

Yangguang Power Plant, and Environmental Auditing Report; the report evaluates the

implementation of original EMP and further supplements the EMP based on the

newly-increased high-voltage variable frequency speed control system of #2 boiler;

meanwhile, the related provisions stipulated in Environmental, Health, and Safety

Guidelines for Thermal Power Plants (EHS) are listed in this report.

1.1 Project Background and Progress

Shanxi Yangguang Power Generation Co., Ltd. (hereinafter referred to as

“Yangguang Power Plant”), located in Pingding County, Yangquan City, is 4 km and

15km away from Pingding County and Yangquan City. Yangguang Power Plant is

adjacent to Shitai Expressway, with convenient traffic conditions. Yangguang adopts

condensing coal-fired turbine generating units, with the total installed capacity of

4×300MW and evaporation capacity of 4,100t/h.

Yangguang Power Plant has proposed 4 subprojects under the support of GEF Grant,

namely, Air Sealing Retrofit of #4 Turbine, High-Pressure Variable-Frequency Speed

Control System for #1 Boiler, Online Monitoring Device for Coal Dust Pipe of #4

Boiler and Software Development Project for Negative Balance Coal Consumption

Calculation. So far, the rehabilitation projects which are under progress are as

follows:

Table 1.1-1 Energy Conservation Rehabilitation Projects Under Progress

Project Name Contents Effect Progress Implementation

Period

Air Sealing Retrofit

of #4 Turbine

Air Sealing

Replacement

Annual coal equivalent

saved 10,566 tons; coal

consumption down by

5.87g/kwh for single

turbine

Completed

Overhaul period

of #4 turbine

during March to

April 2008

High-Pressure

Variable-Frequency

Speed Control

System for #1

Boiler

Installation of

Frequency

Converter on #1

Boiler

Estimate annual coal

equivalent saved: 1,560

tons; auxiliary power

consumption rate down

by 0.045%; coal

consumption down by

0.195g/kwh

Under progress

and equipment

has been

delivered to

Yangguang

Overhaul period

of #1 turbine

during August

2012

1.2 Preparation Basis

1.2.1 Law, Regulation and Policy Basis

(1) “Environmental Protection Laws of PRC”, December 1989;



5

(2) “Law on Prevention and Control of Atmospheric Pollution of PRC”, amended in

April, 2000;

(3) “Implementation Rules of Water Pollution Prevention and Control Law”, amended

in March 2000;

(4) “Environmental Noise Prevention and Control Law of PRC”, November 1996;

(5) “Solid Waste Pollution Prevention Law of PRC”, amended in December 2004;

(6) “Law of Environmental Impact Assessment of PRC”, October 2002;

(7) “Law of Promotion of Cleaner Production of PRC”, June 2002;

(8) “Notification on Strengthening the Environmental Impact Assessment in the

Projects Financed by International Finance Organizations”, issued by the State

Environmental Protection Administration (No.324, [1993]) on June 21, 1993;

(13) “Notification on the Issuance of Mid- and Long- term Special Planning”, issued

by National Development and Reform Commission (No. 2505, [2004]), November 25,

2004;

(14) “Decisions on Implementation of Scientific Development View and

Strengthening of Environmental Protection”, issued by the State Council (No. 39,

[2005]), in 2005;

(15 “Decisions on Enhancing Energy Conservation”, issued by issued by the State

Council (No. 28, [2006]), August 6, 2006;

(16) “Notification on the Issuance of the Comprehensive Working Plan of Energy

Conservation and Pollution Reduction”, issued by the State Council (No. 15, [2007]),

May 23, 2007.

1.2.2 Relevant Regulations of World Bank

(1) World Bank OP/BP4.01 and its Appendixes (Environmental Assessment), January

1999.

(2) World Bank OP/(Environmental Assessment), January 1999.

(3) World Bank GP4.01 (Environmental Assessment), January 1999.

(4) Environmental, Health, and Safety Guidelines for Thermal Power Plants,

December 2008

1.2.3. Technical Documents

(1) Environmental Management Plan for Energy Conservation Rehabilitation Project

of Yangguang Power Plant, China Institute for Radiation Protection, Jan. 2008;

(2) Environmental Impact Evaluation for Energy Conservation Rehabilitation Project

of Yangguang Power Plant, China Institute for Radiation Protection, Jan. 2008;

(3) Environmental Auditing Report for Energy Conservation Rehabilitation Project of

Yangguang Power Plant, China Institute for Radiation Protection, Jan. 2008;



6

(4) Relevant technical documents provided by the project owner

1.3 Execution Standard

1.3.1 Construction Period

The Noise Limits for Construction Site (GB12523-90) is applicable to noise control

within the boundary of the construction site; see Table 1.3-1 for the criteria.

Table 1.3-1 Noise Limits for Construction Site

Construction Phase Main Noise Source Standard Limits (dB(A))

Day time Night time

Architectural

Construction

Concrete vibrators, electric

saws, etc. 70 55

Interior Fitment Cranes, elevators, etc. 65 55

1.3.2 Operation Period

(1) Emission Standard for Air Pollutants

The emission concentration of boiler flue gas shall not exceed the maximum

permissible emission concentration during Time Period III stipulated in Emission

Standard of Air Pollutants for Thermal Power Plants (GB13223-2003).

Table 1.3-2 Air Pollutants Emission Standard for Thermal Power Plant

Type of Boiler Pollutants Maximum Emission Concentration

at Time Period III (mg/m3)

Coal-fired

Boiler

Smoke and Dust 500

SO2 400

NOX 1100

Note: Vdaf＜10%

(2) Wastewater Discharge Standard

The wastewater discharge is subject to the Category-I standard as described in Table 4

of “Integrated Wastewater Discharge Standard (GB8978-1996). The details are shown

in Table 1.3-4.

Table 1.3-4 Integrated Wastewater Discharge Standard

Pollutant Standard Pollutant Standard Pollutant Standard

pH 6～9 Petroleum 5 CODCr 100

Suspended

particulates 70 Fluorides 10



7

(3) Noise Emission Standard

Within the western, southern and eastern boundary of the Power Plant the noise is

subject to Category-II standard as defined in Noise Standard within Boundary of

Industrial Site (GB12348-90); and at the northern boundary the noise is subject to

Category-IV standard of GB12348-90. The standard limits are shown in Table 1.3-5

Table 1.3-5. Noise Standard within Boundary of Industrial Site

Category Standard (dB(A))

Day time Night time

Category II 60 50

Category IV 70 55

(4) Solid Waste Storage Standard

Solid waste disposal is subject to Standard for Pollution Control in Storage and

Disposal Site for Common Industrial Solid Wastes (GB18599-2001).



8

2 Compliance Evaluation Report of Original EMP and EAR

2.1 Compliance of Original EMP

Among the original 4 rehabilitation subprojects supported by GEF Grant, the Air

Sealing Retrofit of #4 Turbine has been completed.

2.1.1 Compliance of Environmental Risk Mitigation Measures

(1) Main Environmental Risk Mitigation Measures during Construction Period

The air sealing retrofit of #4 turbine has a short construction period and small

engineering amount, without any wastewater discharge. During the construction,

small amount dust were produced, the ventilation has been enhanced to meet the

emission standard. The construction site is within the turbine generators set, there was

almost no impact on the surrounding acoustic environment. The waste air sealing that

has been replaced during the construction has been collected and sold by Supply

Department of Yangguang so that the solid waste has been properly handled.

(2) Main Environmental Risk Mitigation Measures during Operation Period

During the retrofit of #4 air sealing, only the air sealing has been replaced and no

component of boiler and turbine has been changed. After the retrofit project, the coal

consumption and evaporation capacity have not been changed, however, the sealing

performance has been improved and the steam loss has been reduced; therefore, after

the completion of the retrofit project, under the same power generation capacity, the

emissions of waste gas, wastewater, solid waste and noise are reduced, so that the

effect of energy conservation and emission reduction has been realized.

2.1.2 Compliance of EMP

The compliance table of EMP is shown in Table 2.1-2.

Compliance Evaluation Report of Environmental Management Plan (EMP) and Environmental Auditing Report & Supplemental EMP for Energy Conservation Rehabilitation Project of #2

Boiler of Yangguang Power Plant

9

Table 2.1-1 Main Environmental Impact and Mitigation Measures during Construction Period of Air Sealing Retrofit for #4 Turbine

Peri

od

Environmental

Factors Main Environmental Impact Proposed Mitigation Measures

Compliance of Mitigation

Measures Effect Contractor Supervisor

Co

nstru

ction P

eriod

Ambient Air

A small amount of welding

smoke was produced during

the cutting, welding and

drilling.

There was small amount of

welding smoke and the ventilation

shall be enhanced.

The site ventilation has been

enhanced accordingly.

The emission standard has

been met, without impact on

ambient air.

Harbin

Tongneng

Electrical

Co., Ltd.

Yangguang

Power Plant &

Yangquan

Municipal EPB

Water No wastewater was

produced. — —

No wastewater was

discharged.

Sound The noise at 60 ～ 70B(A)

was produced.

The low noise equipment shall be

selected.

The emission standard has

been met, without any

impact on surrounding

acoustic environment.

Solid Waste

The total of 22 sets air

sealing were replaced, the

main components of which

include iron, manganese and

chrome.

After disassembled on the site, the

waste air sealing shall be

collected and sold by the Supply

Department.

22 sets of sealing rings have

been replaced and have been

collected and sold by

Yangguang.

The solid waste has been

properly disposed of.

Table 2.1-2 Compliance of Environmental Monitoring Plan during Construction Period of Air Sealing Retrofit for #4 Turbine

No. Environmental

Factors Monitoring Spot Monitoring Item

Monitoring

Frequency Owner

Monitoring and

Supervision Unit Compliance of EMP

1 Ambient Air Peripheral of construction

site and office area TSP

Once per month and

2 days for once

Yangguang

Yangguang Power

Plant & Yangquan

Municipal EPB

The air sealing retrofit of #4

turbine was carried out inside the

generating sets, without any

impact on ambient air and

acoustic environment. During the

construction period, the statistics

on solid waste has been carried

out.

2 Noise

1m away from boundaries of

construction site and

Yangguang

Leq

Once per month and

at daytime and

nighttime

respectively

3 Solid Waste Construction Site Name, amount and

whereabout of solid waste Once per month



10

Table 2.1-3 Main Environmental Impact and Mitigation Measures during Operation Period of #4 Air Sealing Retrofit

Stage

Environ

mental

Factors

Item Major Environmental

Impacts Proposed Mitigation Measures Contractor Supervisor

Compliance or

Not

Op

eration

Perio

d

Ambient

Air

Boiler

Flue Gas

Major pollutants SO2, dust,

NO2 contained in flue gas

emitted from coal-fired

boiler

(1) #1 and #3 boilers shall be equipped with electrostatic

precipitators, with dust removal efficiency of over 99.9%; #2 and #4

boilers shall be equipped with bag-type precipitators, with dust

removal efficiency of over 99.9%; dust emission concentration

<30mg/m3.

(2) Limestone-gypsum wet desulfurization process shall be adopted,

with desulfurization efficiency of over 90%, SO2 emission

concentration ≤400mg/m3.

(3) NOx emission concentration ≤100mg/m3

(4) Flue gas on-line monitoring device shall be installed so as to

facilitate supervision and management of exhaust gas pollution

source and to reduce air pollution.

Yangguang

Power

Plant

Yangquan

Municipal

EPB

The mitigation

measures have

been taken

accordingly.

Coal

(Powder)

Dust

Unorganized emission of

dust during the storage and

transportation of coal, ash

and slag

(1) Transport vehicles shall be covered with canopies.

(2) Wind-shield and dust-suppression walls shall be built around the

coal fields, and water-spraying facilities are provided. Such measures

can reduce the dust at coal field by more than 70%.

(3) The belt room of coal transmission room and coal scuttle of coal

storage room shall be installed with bag filter to remove the dust.

(4) The coal handling gallery shall adopt the belt conveyor for closed

transportation.

(5) The afforestation shall be enhanced so that the afforested area

accounts for 80% of total area.

Water

Environ

ment

Waste

water

Production wastewater

mainly includes: circulation

cooling water, wastewater

from reverse osmosis water

treatment system,

acid/alkali-containing

wastewater generated from

preparation of chemical

demineralized water,

domestic sewage, flue gas

(1) Industrial wastewater mainly includes: recycled acid-alkaline

wastewater from chemical water treatment system, backwash

wastewater from filter and reverse osmosis device, resin-containing

wastewater from condensate fine treatment system, wastewater from

boiler cleaning, flushing water of main workshop. The wastewater

drained from the industrial production system enters the industrial

wastewater treatment system to filter the big suspended solids. After

precipitation, the wastewater enters purifying pool before it is used in

coal handling system, spraying coal yard or ash flushing.

(2) The wastewater treatment system shall be installed which is



11

desulfurization wastewater,

coal handling system,

wastewater from coal yard,

etc.

mainly used to collect and dispose of the flushing and dedusting

water from coal handling gallery. After precipitation and filter, it can

be used repeatedly.

(3) The desulfurization wastewater, after treated, can be used for dry

ash humidification.

(4) Domestic wastewater, after treated by domestic wastewater

treatment system, shall be pumped into recovery tank and for dust

removal.

With the implementation of aforesaid measures, wastewater shall be

totally utilized in a comprehensive way, and there is no other

wastewater drained outside.

Op

eration

Perio

d

Acoustic

Environ

ment

Noise

The noise level of boiler

draught fan, blower, coal

mill, feed pump, steam

turbine, generator and exciter

is generally between 90 ~

100dB (A)

A variety of measures such as noise elimination, sound insulation,

vibration attenuation, etc., shall be taken to ensure that within the

western, southern and eastern boundary of Yangguang, the noise

emission can meet Category-II standard as defined in Noise Standard

within Boundary of Industrial Site (GB12348-90); and at the

northern boundary the noise emission can meet Category-IV

standard of GB12348-90.

Yangguang

Power

Plant

Yangquan

Municipal

EPB

The mitigation

measures have

been taken

accordingly.

Solid

Waste Slag

Major solid wastes include

pulverized fly ash, slag and

desulfurization gypsum

(1) The separate ash and slag removal process shall be adopted. The

pneumatic ash removal system has been installed on #1 and #3

boilers and hydraulic ash removal for #2 and #4 boilers. The ash and

slag shall be transported to Yangpogou Ash Yard which is 7km away

from Yangguang at the east by slurry pumps, and the dry ash

collectors are installed.

(2) The boiler slag shall be transported to #3 slag field by vehicles.

(3) The dry ash shall be sold to Shitai High-speed Railway Project,

Concrete Mixing Station of Huatong Group, Yangquan Yamei

Cement Factory, Aerated Concrete Masonry Factory to realize

comprehensive utilization.

(4) The desulfurized gypsum shall be used as the cement additive of

Yangquan Qingshan Cement Co., Ltd. to realize comprehensive use.



12

Table 2.1-4 Compliance of Environmental Monitoring Plan during Operation Period

No. Environmenta

l Factor Monitoring Spot Monitoring Item Monitoring Frequency Contracting Unit Supervisor Compliance or Not

Routine Monitoring by Yangquan Municipal Environment Monitoring Station

1 Waste Gas Chimney (Flue) SO2, Dust and NO2 Once/Quarter, One Day for Once

Yangguang Power

Plant

Yangquan Municipal

Environment Monitoring

Station (EMS)

Compliance

2 Wastewater Reused Water pH, SS, COD, Petroleum,

Fluoride, Sulfide and etc. Once to Twice /Year

Yangquan Municipal

EMS Compliance

3 Noise

1m away from

Factory Boundary

and Office Area

Leq Once/ Half Year, Once at

Daytime and Once at Nighttime

Yangquan Municipal

EMS No

Routine Monitoring by Yangguang Environmental Monitoring Station

1 Waste gas

Chimney (Flue) SO2, Dust and NO2 Continuous monitoring EL3020 CEMS Compliance

Coal yard, coal mill,

coal feeder, belt

conveyor

Coal dust and ash Once/Quarter, 2 days/once,

twice/day

Yangguang Power

Plant Compliance

Implementation according

to requirements described

in Occupational Health

section

2 Wastewater

Drain of ash yard

quality of reuse

water

pH, SS, COD, Petroleum,

Fluoride, Sulfide and etc.

Once/quarter, 2 days/once

Once to twice/month for reuse

water

Implemented, but the

monitoring frequency is

once/year

3 Noise

1m away from

Factory Boundary

and Office Area

Leq Once/ Half Year, Once at

Daytime and Once at Nighttime Compliance

4 Solid waste Plant Area Name, Amount and

Whereabout of Solid Waste Once/Month No



13

Table 2.1-5 Compliance Evaluation Table of EMP

Phase Compliance Evaluation of EMP

Prephase

In Jan. 2008, Yangguang Power Plant entrusted China Institute for Radiation to

formulate Environmental Management Plan (EMP) for Energy Conservation Rehabilitation Project of Yangguang Power Plant, Environmental Impact

Evaluation for Energy Conservation Rehabilitation Project of Yangguang

Power Plant, and Environmental Auditing Report.

Construction

Period

(1) Yangguang has formulated related pollution prevention and control measures

according to the requirements of EMP.

(2) Yangguang has established the special team to monitor and ensure the

fulfillment of pollution prevention and control measures.

Operation

Period

(1) Yangguang has strictly implemented the EMP rules and guaranteed the

normal operation of environmental management.

(2) Yangguang has carried out the monitoring work according to the

requirements of environmental monitoring plan.

2.1.3 Compliance of Monitoring Plan

2.1.3.1 Monitoring Plan

(1) Monitoring Unit

The routine environmental monitoring plan of Yangguang is carried out by the

Monitoring Station of Yangquan Municipal EPB and Shanxi Provincial

Environmental Monitoring Center; meanwhile, Yangguang has installed the

continuous emission monitoring system on #1 to #4 boilers.

(2) Compliance of Environmental Monitoring Plan during Construction Period

The main purpose of retrofit project is to replace the totals of 22 sets of air sealing for

high-, medium- and low-pressure cylinder and water supply pump. There was almost

no pollution caused by waste gas and wastewater. The retrofit was done inside the

turbine generators set, therefore, the noise impact was slight. After the retrofit, 22 sets

of air sealing were replaced.

The retrofit was done inside the turbine generators set, almost without impact on

ambient air and acoustic environment; hence, the monitoring on ambient air and noise

have not been arranged, and the main monitoring plan included the statistics on name,

amount and whereabout of the solid waste.

(3) Compliance of Environmental Monitoring Plan during Operation Period

a. Continuous Emission Monitoring System

Yangguang has installed 8 sets of continuous emission monitoring systems (CEMS) at

the inlets and outlets of 4 boilers. 2 sets of CEMS for #4 boiler are EL3020 produced

by Beijing Zhongdian Xingye Technology Development Co., Ltd., and has strictly

followed the Continuous Emission Monitoring Rule for Thermal Power Plant

(HJ/T75-2001) to carry out the monitoring.

b. Routine Monitoring by Yangquan Municipal Environmental Monitoring Station

In order to comprehensively monitor the current situation of pollutant emission,

Yangguang has entrusted Yangquan Municipal Environmental Monitoring Station to



14

launch the monitoring on the waste gas, the effluent of plant wastewater treatment

station (reuse water).

(4) Remaining Issues during Implementation of Environmental Monitoring Plan

The continuous emission monitoring and regular monitoring (once per quarter) have

been arranged for flue gas of 4 boilers, and the scheduled monitoring on wastewater

and reuse water has also been arranged. However, according to the collected

monitoring reports, Yangguang has not carried out monitoring on waste gas at

specified monitoring frequency. The specified monitoring frequency for wastewater is

once per quarter, while the actual frequency is once per year. For the factory boundary

noise, Yangguang has not entrusted Yangquan EMS to carry out once monitoring per

year.

Therefore, there are still remaining issues during the implementation of environmental

monitoring plan. For the monitoring on noise, Yangguang shall arrange the factory

boundary noise at least once per year according to environmental monitoring plan;

and the specified monitoring frequency of wastewater shall be met.

2.1.3.2 Routine Monitoring Result of Pollution Source after Retrofit Project

Yangguang is one of key pollution source monitoring enterprises controlled by the

state. Yangquan Municipal EPB carries out the routine monitoring on the main

pollution sources. This report has collected the routine monitoring files from 2009 to

2011 and has mastered the pollutant emission and standard-meeting information after

the retrofit project.

(1) Routine Monitoring of Boiler Flue Gas

a. Monitoring Spot

The inlets of boiler dust collectors and outlets of desulfurization facilities of 4 boilers.

b. Monitoring Items

Flue Gas, SO2 and NOX

c. Monitoring Frequency

4 times per year (once per quarter), 1 day for once

d. Monitoring Results and Analysis

According to results of continuous emission monitoring and routine monitoring, from

2009 to 2011, the emission concentration of flue gas, SO2 and NOx has met the

maximum permissible emission concentration for coal-fired boilers (Model-W Flame)

during Time Period III stipulated in Emission Standard of Air Pollutants for Thermal

Power Plants (GB13223-2003), namely, Flue gas ≤50mg/Nm3, SO2≤400mg/Nm

3,

NOX≤1100mg/Nm3.

① Continuous Emission Monitoring

The monitoring results statistics on flue gas of 4 boilers during 2009 to 2011 are

shown in Table 2.1-4 below.



15

Table 2.1-4 Continuous Emission Monitoring Results Statistics on Flue Gas

(2009-2011)

Item

Year Smoke and Dust SO2 NOX

2009 31～48 60～350 500～1050

2010 29～48 120～300 650～1005

2011 27～47 100～300 600～980

② Routine Monitoring on Flue Gas

Table 2.1-5 Boiler Flue Gas Monitoring Results 2009 (mg/Nm3)

Item 1# 2# 3# 4#

Flue

Gas

Concentration

Range 31.4～34.2 31～33.6 31.5～34.2 31.3～31.4

Emission

Standard 50 50 50 50

Meeting

Standard or Not Meeting Meeting Meeting Meeting

SO2

Concentration

Range 58.8～122 58.7～134 64.3～122 65.3～113

Emission

Standard 400 400 400 400

Meeting


NOX

Concentration

Range 427～703 489～696 425～703 372～705

Emission

Standard 1100 1100 1100 1100

Meeting




16


Item 1# 2# 3# 4#

Flue

Gas

Concentration

Range 31.6～32.7 29.7～35.3 31.9～36.5 29.3～36.7

Emission


Meeting


SO2

Concentration

Range 129～289 187～290 167～292 121～290

Emission

Standard 400 400 400 400

Meeting


NOX

Concentration

Range 332～861 441～821 439～815 431～843

Emission

Standard 1100 1100 1100 1100

Meeting



Item 1# 2# 3# 4#

Flue

Gas

Concentration

Range 27.6～32.0 28～32.9 27.3～32.3 29.0～38.3

Emission


Meeting


SO2

Concentration

Range 222～277 105～232 116～268 193～232

Emission

Standard 400 400 400 400

Meeting


NOX

Concentration

Range 207～894 209～1060 213～783 215～796

Emission

Standard 1100 1100 1100 1100

Meeting




17

(2) Routine Monitoring of Wastewater

a. Monitoring Spot

Outlet of wastewater treatment station and drain of wastewater

b. Monitoring Items

PH, NH3-N, CODcr, Volatile Phenol, Sulfide, Petroleum and SS

c. Monitoring Frequency

Once per year and one day for once

d. Monitoring Results and Analysis

In accordance with the monitoring results during 2nd

Quarter and 4th

Quarter provided

by Yangquan Municipal Environmental Monitoring Station, all of wastewater has

been reused.

Table 3.2-1 Routine Monitoring Results of Wastewater

Date of

Monitoring

Monitoring

Spot Pollutant

Wastewater

Volume

(m3/d)

Concentration

(mg/L) Meeting

Standard

or Not

Remark

Inlet Outlet Inlet Outlet

2nd Q

uarter o

f 20

09

May

26

Outlet of

Wastewater

Treatment

Station

pH

470 470

7.77 Yes

Reuse

NH3-N 4.22 Yes

CODcr 61.6 53.2 Yes

Volatile

Phenol 0.004 Yes

Sulfide 0.005L Yes

Petroluem 0.1L Yes

SS 53 Yes

General

Drain of

Wastewater

pH

4800

8.09 Yes

No

Draining

Outside

NH3-N 0.221 Yes

CODcr 116 Yes

Volatile

Phenol 0.006 Yes

Sulfide 0.005L Yes

Petroluem 0.8 Yes

SS 47 Yes

4th Q

uarter o

f 20

10

Outlet of

Wastewater

Treatment

Station

pH

71

7.82 Yes

Reuse

CODcr 10.3 7.7 Yes

Volatile

Phenol 0.0028 Yes

Sulfide 0.005L Yes

Petroluem 0.1L Yes

SS 29 Yes

pH

4900

7.38 Yes

No

Draining

Outside

CODcr 8.4 Yes

Volatile

Phenol 0.0026 Yes

Sulfide 0.005L Yes

Petroluem 0.1L Yes

SS 135 Yes



18

2.2 Implementation of EAR

As described in the original environmental auditing report, Yangguang could further

improve its environmental protection measures through flue gas denitrification and

enhancement of fly ash utilization rate. The compliance of EAR is shown in Table

2.2-1.

2.3 Sum

To sum up, the completed rehabilitation project has brought outstanding effect of

energy conservation and emission reduction, and is favorable for the improvement of

local environmental quality; meanwhile, Yangguang has adopted environmental risk

mitigation measures and has basically followed EMP and Environmental Monitoring

Plan, and has conducted the routine monitoring on pollution source, so that the

emission standards have been met. However, the monitoring on factory boundary

noise shall be arranged at least once per year and the specified monitoring frequency

on wastewater shall be met.

Yangguang has fulfilled the proposed environmental protection measures specified in

EAR; in addition, Yangguang shall further develop the fly ash market so as to

improve its utilization efficiency.



19

Table 2.2-1 Implementation Status of Suggested Environmental Protection Measures in Original EAR

Item Environmental Protection Measures Suggested in Original EAR Implementation Status

Flue Gas

Denitrification

The W-Model flame is adopted by Yangguang, with high furnace temperature and large NOx

emission. In spite that the NOx emission concentration could meet the requirement specified in

Emission Standard of Air Pollutants for Thermal Power Plants (GB13223-2003), in order to

further improve the local environmental quality, Yangguang shall adopt related measures to

reduce NOx emission.

Solution: Yangguang has established the independent Denitrification Project Dept. to collect

information on the denitrification measures and prophase investigation.

So far, Yangguang has completed the bidding of SCR rehabilitation

project for denitration of 4 generating units. The denitration retrofit

project of #3 generating unit will be completed in July 2012 and by

October 2013, the denitration retrofit projects for all of 4

generating units will be completed. The denitration process adopts

low NOx combustor + selective catalytic reduction (SCR). After

denitration, the NOx emission concentration will be lower than

170mg/Nm3.

Enhancement of Fly

Ash Utilization Rate

The comprehensive utilization rate of fly ash in Yangguang is about 25% and there are large

amount of fly ashes and slag have not been used.

Solution: In order to further enhance the utilization rate of fly ash, the following measures shall

be taken: (1) The dry ash collection system shall be installed on #1 boiler to enhance the output

of fly ash product; (2) Based on the special railway transport line of Yangguang, the market in

Beijing shall be further developed; it is planning to build a 500m3 ash storage along the railway

line; (3) It is planning to build a 150,000m3/a aerated concrete masonry production line. After

the aforesaid projects are completed, the comprehensive utilization rate of fly ash will exceed

75%.

In order to further enhance the utilization rate of fly ash,

Yangguang has installed pneumatic ash handling system on #1 and

#2 generating units, which has substantially reduced the water

consumption and promoted the comprehensive utilization of fly

ash; meanwhile, Yangguang has cooperated with Huatong Group

to build a 150,000m3/a aerated concrete masonry production line.

So far, the comprehensive utilization rate of fly ash has exceeded

60%.



20

3. Denitration, Demercuration and Proposed Environmental

Protection Measures during Recent Period

3.1 NOx Pollution Prevention and Control

During “12th

FYP”, China will further promote the energy conservation and emission

reduction and control the total amount of SO2 emission, and the NOx emission

control will be also involved; therefore, in addition to desulfurization, there will be a

new round of control of denitration; on the other side, in the Emission Standard of Air

Pollutants for Thermal Power Plants, the emission standard of NOx shall be lower

than 200mg/Nm3 (W-model flame) from July 1

st, 2014.

In Shanxi, during “12th

FYP”, all of thermal power plants shall installed low NOx

combustors and denitration facilities; therefore, Yangguang is planning to conduct

flue gas denitration rehabilitation for 4 generating units so as to further improve local

environmental quality.

In accordance with NOx emission standard and rehabilitation schedule, Yangguang

has completed the bidding of SCR rehabilitation project for denitration of 4

generating units. The denitration rehabilitation project of #3 and #2 generating units

will be completed in July and December 2012 respectively. The rehabilitation work

for the other 2 generating units will be completed in April and October 2013

respectively.

For denitration process, inside the furnace, the low NOx combustor is proposed;

outside the furnace, the selective catalytic reduction (SCR) process is proposed. The

designed NOx concentration at inlet is 1000mg/Nm3, 100% of flue gas will be

handled and the final NOx concentration will be lowered to170mg/Nm3 .

3.2 Heavy Metal (Mercury) Pollution Prevention and Control

The Emission Standard of Air Pollutants for Thermal Power Plants (GB13223-2003),

a regulation currently in force in China, does not set an emission limit for mercury.

However, a revised version of Emission Standard of Air Pollutants for Thermal

Power Plants (GB13223-2011) has introduced a limit on the release of mercury and

associated compounds from Jan. 1st, 2015.

It is known from the Emission Standard of Air Pollutants for Thermal Power Plants

(GB13223-2011) that the coal-fired power plants operating in China apply no specific

techniques or facilities to remove mercury, although a synergistic control may be

achieved through dedusting, desulphurization and denitration.

At present, Yangguang adopts electric fabric dust collectors and wet limestone

scrubbers to produce the synergistic effect of demercuration. The EU’s Reference

Document on Best Available Techniques for Large Combustion Plants recommends a

combined application of high performance dedusting devices, fuel gas

desulphurization (FGD) and denitration techniques for Hg removal, and states that for

electrostatic precipitator (ESPs) or fabric filter (FFs) operated in combination with

FGD techniques, an average removal rate of Hg is 75% (50 % in ESP and 50% in

FGD) and 90% in the additional presence of a high dust SCR can be obtained.



21

Hence, Yangguang can achieve a 75% Hg removal rate with its existing fuel gas

treatment facilities, and a rate of 90% in combination after the construction of fuel gas

denitration facilities is completed.

3.3 Proposed Environmental Protection Measures

With the higher and higher requirements on environmental protection and the

development of environmental protection technologies, from 2012 to 2013,

Yangguang proposes to invest 489 million RMB to carry out retrofit, update and

improve the original environmental protection facilities so as to substantially reduce

the pollutant emission and make more contributions to local environmental quality

improvement. The proposed environmental protection projects are shown in Table

3.3-1.

Table 3.3-1 Proposed Environmental Protection Projects from 2012 to 2013

No. Name of Project Estimate Date of

Completion

Investment

(10,000 RMB) Effect

1 Wastewater Treatment and

Reuse Project End of 2012 4500

Reduce the wastewater

discharge and the consumption

of fresh water

2 Denitration Project for 4

Generating Units October 2013 36000 Reduce the emission of NOx

3

Installation of Bag-type Dust

Removers on #1 and #3

Generating Units

End of 2012 4400 Reduce the emission of smoke

and dust

4

Capacity Enlargement Project

of Desulfurization Systems

for 4 Generating Units

End of 2013 4000 Reduce the emission of SO2

Total 48900

3.3.1 Wastewater Treatment and Reuse Project

Due to the rehabilitation of dust removal system and the comprehensive utilization of

fly ash and slag, there are large amount of wastewater to be reclaimed and treated;

therefore, Yangguang has actively promoted the comprehensive utilization of

wastewater. So far, the feasibility study report has been prepared and Yangguang is

ready for bidding. It is estimated that the project be started in April 2012 and

completed in the end of 2012. The total investment is 45 million RMB. After the

project is completed, about 5,000 tons of industrial water shall be saved per day, 1.5

million tons per year.

3.3.2 Denitration Project for 4 Generating Units

So far, Yangguang has completed the bidding of SCR rehabilitation project for

denitration of 4 generating units. The denitration rehabilitation project of #3 and #2

generating units will be completed in July and December 2012 respectively. The

rehabilitation work for the other 2 generating units will be completed in April and

October 2013 respectively. The total investment is 360 million RMB. For denitration

process, inside the furnace, the low NOx combustor is proposed; outside the furnace,

the selective catalytic reduction (SCR) process is proposed. The designed NOx

concentration at inlet is 1000mg/Nm3, 100% of flue gas will be handled and the final

NOx concentration will be lowered to170mg/Nm3 .



22

3.3.3 Installation of Bag-type Dust Removers on #1 and #3 Generating Units

In order to further reduce the dust emission, Yangguang proposes to invest 44 million

RMB to install the bag-type dust removers on #1 and #3 units, which will be

completed in the end of 2012. After the project is completed, the dust removal

efficiency will be increased to 99.97% from 99% and the smoke and dust emission

concentration will be lower than 30mg/Nm3.

3.3.4 Capacity Enlargement Project of Desulfurization Systems for 4 Generating

Units

In order to improve the stability of desulfurization systems and ensure the qualified

emission of SO2, Yangguang proposes to invest 40 million RMB to carry out capacity

enlargement of desulfurization systems. So far, the desulfurization system of #4

generating unit has been completed and is under 168-hour commissioning. Based on

the information of commissioning, the desulfurization efficiency has been increased

to over 98% from 95%. The capacity enlargement projects for #1, #2 and #3 units

shall be carried out during the overhaul period.



23

4. Occupational Health and Safety

4.1 Occupational Health Rules

In order to prevent, control and eliminate occupational hazards, improve occupational

disease prevention, protect the health of workers and their legitimate rights and

interests, and promote coordinated economic and social development, according to

Law of the Peoples Republic of China on Prevention and Control of Occupational

Diseases, Yangguang has developed Occupational Disease Prevention and Control

Plan. Related management system also includes Health Monitoring and Management

System, Emergency Response and First Aid Plan for Occupational Disease Accidents

and Routine Monitoring and Periodical Testing Rules for Hazard Factors of

Occupational Disease.

Yangguang has established Production Safety Committee headed by General Manager,

and Labor Protection, Supervision and Inspection Committee headed by the Chairman

of Labor Union. Yangguang also established a company-wide safety network; HSE

Department exercises the functions of labor safety and occupational health

management and supervision, in addition to the assistance of Safety Supervision Dept.

and the Supervision of Labor Union, a complete labor safety and occupational health

management system has been established.

4.2 Occupational health management plan

According to relevant requirements for working conditions and safety set forth in the

Environmental, Health, and Safety Guidelines for Thermal Power Plants (EHS

Guidelines) and General Environmental, Health, and Safety Guidelines (General EHS

Guidelines), attention should be paid mainly to the factors affecting occupational

health and safety of employees of operating thermal power plants, including

non-ionization radiation, heat, noise, confined space, electricity hazards, fire and

explosion potentials, chemical hazards and dust. The occupational health management

plan of Yangguang addresses the above factors one by one as follows:

4.2.1 Non-ionization radiation

Since the employees of power plant work close to generators, power transmission or

transformation equipment and high voltage power lines, their exposure to

electromagnetic field is higher than usual.

Yangguang has four main transformers and all of them are 220KV. Safety fences have

been set up as required to delineate a protection area and prevent unauthorized access

of irrelevant people. All persons authorized to enter the site must be trained and work

in compliance with the “two-ticket” requirement (i.e. work ticket and operation

ticket).

4.2.2 Heat



24

Yangguang has formulated Safety Measures on Burning Prevention for Employees

Working with High-Temperature Equipment to prevent scald. The work ticket system

must be followed by the workers when handling high-temperature equipment, that is,

no work shall be started until written approval has been obtained respectively from

the workplace supervisor, the operation team leader and the safety guard on duty.

Besides, the high-temperature, high-voltage equipment maintenance guidelines must

be strictly observed.

(1) In case of heated but unpressurized devices (such as deaerator,

high/low-temperature heater, shaft seal heater, flash vessel, temperature/pressure

reducer and condenser), the temperature inside the device must be lowered down to

normal level, at maximum not exceeding 20% of the upper limit, to prevent burning.

In emergency, workers may take turns to work and rest (do a shift) if conditions are

tolerable.

(2)In the event of dismantling high temperature objects like bolts on the mating face

of cylinder, gloves and other PPE intended for burning prevention shall be worn to

avoid direct contact with human skin.

(3) For equipment above normal temperature, ventilation shall be reinforced for

cooling purpose and men shall not contact or stay in the equipment for a long time.

(4) Working with high-temperature equipment shall be under supervision to ensure

safety and provide first aid in case of burning.

4.2.3 Noise

In thermal power plant, there is a comprehensive source of noise, including a variety

of fans, water pumps, coal crushers, turbine-generator sets, boilers, etc. The existing

noise-proof measures include:

(1) Long-distance operation in a silence cabinet where noise is concentrated;

(2) Sound muffler installed at the inlet of forced draft fan or air compressor;

(3) High performance muffler installed at the outlet of boiler valves;

(4) Acoustic enclosure with inner absorbing sheet to reduce noise from

turbine-generator sets;

Signboards in High Temperature

Workplace in Yangguang



25

(5) Keeping airflow rate far below the upper limit and using specialized heat

insulation materials to reduce the noise from fast-flowing air current in the

high-temperature and high-pressure steam pipes;

(6) Proper design and reasonable layout of fuel gas pipes to ensure smooth flow and

reduce pneumatic noise;

(7) Circular corridors around centralized control room, with sound-proof doors,

windows and walls to insulate against noise;

(8) Separate duty rooms with appropriate sound insulation;

(9) Earplugs provided for workers exposed to noise as PPE.

4.2.4 Confined Space

Yangguang carries out the management in accordance with the provisions of Working

in Containers specified in Working Safety Regulation of State Grid Company

(Thermal Power Plants).

(1) Before maintenance inside the boilers, the blind plates shall be installed to isolate

the connections with steam bus pipe, water supply bus pipe and emission bus pipe and

then the safety signs shall be hung. The power supply or air supply of electric and

pneumatic valves shall be cut off and the safety signs shall be hung.

(2) Before inspection, cleaning and maintenance inside the containers and tanks, the

operators shall obtain the operation ticket firstly. During work, the ventilation shall be

ensured; however, the oxygen supply shall be prohibited.

(3) In case of hazardous gases or residue that is possible to generate hazardous gases

existing inside the containers or tanks, the operators shall start their work after clear

all of hazardous gases or residues.

(4) For the operators who work in the containers or tanks, they shall carefully read the

attentions firstly. There shall be at least 2 operators and one of them shall stay outside

for monitoring.

(5) Before closing the manhole of containers or tanks, the chief person shall count the

operators and tools and ensure that there is no operator or tool left inside.

4.2.5 Electric hazard

Yangguang carries out the management in accordance with the provisions of

Substation and Electric specified in Working Safety Regulation of State Grid

Company.

(1) Power Generation Safe Practices and Supplementary Regulations on the Work

Ticket and Operation Ticket System for Electricity and Circuit shall be obeyed in a

rigorous way. Exams shall be held regularly with regard to the above practices and

regulations, while the results shall be used as one of parameters for promotion.



26

(2) The work shift system shall be followed strictly; supervisors or unit leaders shall

give their instruction in a clear, definite and standardized way, while operators shall

have a thorough understanding about the task and be familiar with the current

working mode of system.

(3) Under the operation supervision system, switching a system from one mode to

another requires two operators, and such operation shall never be conducted without

supervision.

(4) During operation process, no step shall be omitted, added and skipped, and under

no circumstance, several steps can be operated at the same time. In case of any

problem, the worker shall discontinue operation, instead of changing operation ticket

without authorization, until the reasons are identified; then, the operation ticket may

be rewritten as necessary.

(5) The error-proof block management shall be reinforced in strict adherence to

Error-Proof Block Management Regulations; the error-proof blocking devices shall

be regularly inspected and serviced to ensure these devices are 100% in a good

working condition.•

(6) Work group training management shall be strengthened by periodical on-the-post

training and accident prevention rehearsal. By virtue of these trainings, the workers on

various posts will improve their capacity for evaluating, analyzing and handling

accidents and enhance their technical level.

(7) For the purpose of switching operation, the workers shall wear helmet, insulating

gloves and other safety equipment as appropriate, and safety measures shall be fully

adopted to satisfy relevant requirements stipulated in safety regulations.

(8) Under the “safety foremost, prevention oriented” policy, safety training shall be

conducted diligently, exams on safety regulations and “two-ticket” system shall be

held annually and the workers who fail the exams are prohibited from operation.

4.2.6 Fire and explosion hazards

Yangguang has formulated Safety Standard for Working in Coal Dust Places,

Countermeasures against Hydrogen Fire or Explosion of Hydrogen-Cooled

Generator, and Fuel System Fire Protection Rules.

Working inside fuel tank (container), acid/alkali tank (container), coal mill chamber

and pulverizing cylinder, coal powder bin, chlorination room, ammonification room,

covered gutters, ditches and other places having insufficient oxygen and combustible,

explosive or poisonous hazards are especially dangerous in the sense that serious

accidents, like suffocation, intoxication, explosion and fire, may occur for lack of

proper safety measures.



27

4.2.7 Hazardous Chemicals

The places where harmful substances are stored or fed are the main source of

poisonous hazard. Such substances include CO, SO2, NOX, ammonia, hydrochloric

acid, NaOH and so forth. The existing poison-proof measures include:

(1) Mechanical approaches and automation are preferred when designing the

production process and facilities for poisonous materials. Besides, the workplace

should be closed, direct operation should be avoided and ventilation measures should

be taken where the production process allows.

(2) Ammonia and hydrazine warehouse, ammonia and hydrazine room and laboratory

should be naturally ventilated.

(3) Acid and alkali warehouse, bump house, measurement room and battery room

should be naturally ventilated.

(4) During maintenance or auxiliary production, workplaces shall be provided with

protection measures and ventilation to reduce worker exposure to hazards. Gas mask

and other protection equipment shall be provided for certain posts, and

special-purpose protection apparatus provided for workers exposed to strong acid or

alkali.

4.2.8 Dust

Coal transportation, storage, feeding and pulverization processes, in addition to the

dedusting system, are the main source of dust hazard. The existing dust-proof

measures include:

(1) On the coal yard, water sprayer should be installed every several meters to

sprinkle water for several times a day; meanwhile, green belts should be enlarged to

mitigate coal dust pollution.

(2) Atomizer should be added on the portal-type rotary-wheel stacker-reclaimer,

sprinkling at a rate of 5-6m3/h for each machine.

(3) The original bunker of the silo should be provided with a gravity baffle plate and

the impeller coal feeder should be fitted with a dust precipitator.

Signboards in Combustible and Explosive

Workplace



28

(4) The coal pulverizer room and different operation stations should be provided with

a cushion flap valve, enclosure devices, and dust collection system; belts and floors

should be provided with water flushing devices so as to clean the floor off dust.

(5) Duty rooms of coal transport system should be equipped with dust and sound

insulation devices; also inspection patrol practice should be maintained.

(6) Stray dust in the boiler room and on the belts of the coal bunker bay should be

cleaned using vacuum dust collection system.

(7) The operation level and the bottom level of boiler, ash slurry pump house, each

operation station, coal pulverizer room, and coal bunker should be provided with

hydraulic sweeping devices so as to prevent secondary flying dust.

(8) Before service and maintenance, the pulverizing system and the dry ash system

should be cleared of all the residual ash or be flushed clean using water.

(9) Coal bunker interchange stations should be provided with water-activated dust

collector; the original bunkers in the coal bunker bay were provided with bag filter.

(10) Workers exposed to dust should be equipped with dust respirator, dust-proof

overall, and gloves.

4.2.9 Field rescue of occupational diseases

Certain occupational diseases are prone to acute attack, for instance acute chemical

poisoning, such as cyanides, hydrogen sulfide, carbon monoxide, chlorine, and

ammonia, and as well as chemical burns; also, heat stroke should be minded. Field

rescue shall be done properly, because this is critical to life saving and curing

timeliness and is also an important step for preventing illness worsening and for

promoting earlier recovery.

Victims of acute poisoning shall be first of all removed from the site, be kept calm

and warm. If the clothes are contaminated by poisonous substance, they shall be

replaced instantly and the skin be cleaned. In case of respiratory arrest, artificial

breathing shall be given promptly. For certain acute poisoning cases, the clinic

professionals shall administer antidotes in early stage. For instance, isoamyl nitrite

inhalation, sodium thiosulfate and sodium nitriate intravenous injection may be

administered for acute cyanide poisoning; methylene blue intravenous injection may

Signboards in Dust and Coal Dust Workplace



29

be administered for acute aniline or nitrobenzene poisoning; pyraloxime iodide or

phosphorus chloride injection may be given for acute organic phosphorus pesticide

poisoning.

Acute poisoning of several persons need to be handled in time and with care even

more. Emergency rescue plan for acute occupational poisoning should be in place. A

command system shall be set up immediately after the occurrence of emergencies,

and light or serious cases should be screened and taken care of separately; accident

management and reporting to competent authorities shall be done properly.

Victims of chemical burn shall have their parts cleaned by clean water immediately

on site. Heat stroke victims shall be removed from heat sources to a well ventilated

place and then have the body rubbed by cool water and shall drink saliferous

refrigerant beverage. Medical professionals shall be sent for or the victims shall be

transferred to a clinic institution for emergency treatment while preliminary treatment

is being given.

4.3 Implementation and Corrective Measures Concerning

Occupational Sanitation Control

In spite of the general satisfaction of requirements in the World Bank’s

Environmental, Health, and Safety Guidelines for Thermal Power Plants (EHS

Guidelines) and General Environmental, Health, and Safety Guidelines (General EHS

Guidelines) in respect of 8 aspects of occupational health and safety for thermal

power plant at operating stage, Yangguang still needs continuous improvement,

mainly in the following area.

(1) Signboards need to be set up in non-ionization radiation places (close to

generators, power transmission and transformation facilities and high-voltage power

lines); areas where the electromagnetic radiation dose is below a specified level need

to be defined as safe places; or otherwise, as unsafe places; exposure to unsafe places

need to be prevented or reduced wherever possible; and the workers in such places

need to be properly protected and have physical examinations at regular intervals.

(2) Fire and explosion control measures need to be perfected in coal dust

concentrated areas. For example, vehicle stop and travel regulations should be

formulated to minimize the risk of explosion caused by suspending high-temperature

pulverized coal during traveling period. Besides, workplaces should be cleaned

periodically to prevent coal dust accumulation.

4.4 Sum

In combination with the characteristic of occupational health in thermal power plants,

and targeting various unsafe and unhealthy factors those affecting the workers’ safety

and health, Yangguang has actively taken various precautions, and has improved its

normalized management, engineering control, staff education and training, medical

care, individual protection and dust monitoring so that the workers’ safety and health

have been effectively guaranteed.



30

5. Environmental Risk Mitigation Measures and EMP for

Rehabilitation Project of #2 Boiler

5.1 Profile of High-voltage Variable Frequency Speed Control

System Project of #2 Boiler

The project mainly includes construction of frequency conversion control system

(40m2), installation of frequency conversion equipment and electric circuit retrofit of

fans.

5.1.1 Newly Increased Equipment

The newly increased equipment is shown in Table 5.1-1.

Table 5.1-1 Equipment List

No. Name Quantity (Set)

1 High Voltage Frequency Converter 2

2 High Voltage Switchgear 4

3 Heat Exchanger 2

4 Axial Flow Fan 380VAC 2

5 Synchronous Power Supply Switch Device 2

5.1.2 Technical Parameters of Frequency Converter

Table 5.1-2 Technical Parameters of Frequency Converter

No. Name Parameter

1 Capacity (KVA) 1400

2 Power of Adaptable Motor (KW) 1400

3 Input Frequency (Hz) 45～55

4 Rated Input Voltage (V) 6000V+5%/-10%

5 Factor of Input Power 0.95（>20% Load）

6 Efficiency Under Rated Load: >0.96

7 Output Frequency (Hz) 0～50

8 Definition of Output Frequency

(Hz) 0.01

9 Overload Capacity 120% Per Minute; 150% Protection



31

Activated

10 Input Analog 0～10V/4～20mA, Setting

Available

11 Output Analog 0～10V/4～20mA Optional

12 Acceleration or Deceleration (s) 0.1～3000

5.1.3 Effect Analysis

According to analysis and calculation, after retrofit, 30% of power consumption can

be saved (annual power consumption is about 12 million KWh); therefore, about 3.6

million KWh of power can be saved annually, accounting for 0.045% of auxiliary

power consumption; meanwhile, about 0.195g/kwh of coal consumption can be

lowered and annually about 1,560 tons of coal equivalent can be saved.

5.2 Environmental Risk Mitigation Measures during Construction

Period, EMP and Environmental Impact Analysis

5.2.1 Environmental Risk Mitigation Measures during Construction Period

Environmental Risk Mitigation Measures: Only a brick-concrete structure frequency

conversion control room (40m2) will be built, with small engineering amount;

therefore, the output of dust, wastewater, noise and construction waste are small. In

order to further mitigate the construction pollution, during the construction period, the

building material management shall be strengthened to reduce the dust output; the

construction wastewater shall be reused for agitation; the rational construction method

shall be adopted to reduce the noise; the small amount of construction waste shall be

disposed of together with domestic refuse of Yangguang.

Contractor: Project Contractor

Supervisor: Yangguang Power Plant and Yangquan Municipal Environmental

Protection Bureau

5.2.2 EMP during Construction Period

During construction period, the special environmental management unit shall be

established to ensure the implementation of EMP. The detailed EMP includes:

(1) Ambient Air Quality Control

a. The civilized construction shall be done during construction, and the dust

prevention measures shall be taken, e.g. surrounding plants/walls, water spray, and

coverage of transport vehicles.



32

b. Regular checks shall be performed to working site.

c. The administrative and the economic penalty shall be applied to the violators of

operation procedures and those failing to take corrective actions for the wrong

activities in the construction.

(2) Noise Control

a. The advanced low-noise constructing process will be used to replace the high-noise

process.

b. The construction schedule will be reasonably arranged to avoid of disturbance to

the surrounding residence.

(3) Water Environmental Control

During the construction period, the wastewater is mainly from the domestic sewage

from the construction workers and small of amount of wastewater from construction

activities. The construction workers will all live in the dormitory, and the domestic

sewage will be discharged to domestic sewage treatment plant. The small amount of

wastewater from construction activities mainly contains suspended particulates, which

will be reused for mixing construction materials after sedimentation.

(4) Solid Waste Disposal Control

The solid waste of construction materials will be disposed collectively according the

stipulations of the local authorities. The domestic solid wastes from the construction

workers, Yangguang employees’ waste, will be collected by the local garbage

services for sanitary landfill.

(5) Ecological Environment Control

The proposed project will be performed within the existing area of Yangguang. The

construction area is in a limited area without new land acquisition, involving no

ecological problems.

(6) Social Environment Safeguard

This Project call for neither new land acquisition nor resettlement, thus without

negative effects on social environment.

5.2.3 Environmental Impact Analysis during Construction Period

(1) Ambient Air Impact

A brick-concrete structure frequency conversion control room (40m2) will be built,

and small amount of dust will be produced. Due to small engineering amount, the

amount of dust is very small.

The construction management shall be strengthened during the construction. The

transport vehicles shall be covered with canopies or other anti-drop measures shall be

taken. The building material shall be rationally piled; if necessary, the enclosure shall

be established to reduce the dust emission.



33

After the aforesaid measures are taken, the small amount of dust shall not bring

negative impact to surrounding environment.

(2) Water Environment Impact

a. Construction Wastewater


and small construction wastewater will be produced. Due to small amount of

engineering amount, the amount of wastewater shall be very small. After settlement of

sediment, the wastewater shall be reused to mix the construction material.

After the aforesaid measures are taken, the small amount of construction wastewater

shall not bring negative impact to surface water.

b. Domestic Sewage

The construction workers will stay at the staff dormitory of Yangguang, whose

domestic sewage will be collected by existing sewage treatment facilities and reused.

(3) Acoustic Environment Impact


with the noise at 60～80B(A) brought by construction machineries.

The low-noise equipment shall be adopted and rational construction shall be arranged

so as to reduce the noise emission. In addition, the proposed project will be

implemented within the plant, without any impact to surrounding residents.

(4) Solid Waste Impact


and only small amount of construction waste will be produced.

The construction waste shall be disposed of together with domestic refuse of

Yangguang, without any negative impact to surrounding environment.

To sum up, the proposed retrofit project is with small amount of engineering amount

and will be implemented within the existing plant, with slight impact to surrounding

environment. Such impact is short and reversible, mainly reflected in part of plant

area; therefore, the proposed project will not bring obvious negative impact to

surrounding environment.

The environmental risk mitigation measures and environmental monitoring plan

during the construction period are shown in Table 5.2-1 and 5.2-2.

5.3 Environmental Risk Mitigation Measures and EMP during

Operation Period

After the proposed retrofit project is completed, the environmental risk mitigation

measures and EMP during operation period is shown in Table 5.3-1. In accordance

with specified environmental monitoring requirements in EHS and in combination



34

with original environmental monitoring plan, the environmental monitoring plan

during the operation period are is formulated and shown in Table 5.3-2.



35

Table 5.2-1 Main Environmental Impact and Mitigation Measures during Construction Period of High-voltage Variable Frequency

Speed Control System Project of #2 Boiler

Period Environmental

Factors Main Environmental Impact Proposed Mitigation Measures Implementing Unit Supervisor

Co

nstru

ction P

eriod

Ambient Air

A small amount of fly dust will be

produced during construction

period.

There was small amount of fly dust and

the construction management shall be

enhanced.

Contractor Yangguang Power Plant &

Yangquan Municipal EPB

Water Small amount of construction

wastewater will be produced.

The construction wastewater shall be

reused for mixing after sedimentation.

Sound The noise at 60 ～ 70B(A) was

produced.

The low noise equipment shall be

selected.

Solid Waste Small amount of construction waste

will be produced.

The construction waste shall be

disposed of together with domestic

garbage.

Table 5.2-2 Compliance of Environmental Monitoring Plan during Construction Period of High-voltage Variable Frequency Speed

Control System Project of #2 Boiler

No. Environmental

Factors Monitoring Spot Monitoring Item Monitoring Frequency Owner

Monitoring and

Supervision

Unit

Budget

(10,000RMB/

year)

1 Ambient Air Peripheral of construction

site and office area TSP

Once during construction

period

Yangguang

Yangguang

Environmental

Monitoring

Station

1.5

2 Noise

1m away from boundaries of

construction site and

Yangguang

Leq Once at daytime and

nighttime respectively 0.5

3 Solid Waste Construction Site

Name, amount and

whereabout of solid

waste

Once per month 0.5



36

Table 5.3-1 Environmental Risk Mitigation Measures and Environmental Monitoring Plan during Operation Period

Stage

Environ

mental

Factors

Item Major Environmental

Impacts Mitigation Measures

Proposed Mitigation

Measures Contractor Supervisor

Op

eration

Perio

d

Ambient

Air

Boiler

Flue Gas

Major pollutants SO2, dust,

NO2 contained in flue gas

emitted from coal-fired

boiler

(1) #1 and #3 boilers are equipped with electrostatic precipitators,

with dust removal efficiency of over 99.9%; #2 and #4 boilers are

equipped with bag-type precipitators, with dust removal efficiency of

over 99.9%; dust emission concentration <30mg/m3.

(2) Limestone-gypsum wet desulfurization process is adopted, with

desulfurization efficiency of over 90%, SO2 emission concentration

≤400mg/m3.

(3) NOx emission concentration ≤100mg/m3

(4) Flue gas on-line monitoring device is installed so as to facilitate

supervision and management of exhaust gas pollution source and to

reduce air pollution.

(1) Installation of

Bag-type Dust

Removers on #1 and #3

Generating Units

(2) Capacity

Enlargement Project of

Desulfurization

Systems for 4

Generating Units

(3) Denitration Project

for 4 Generating Units

Yangguang

Power

Plant

Yangquan

Municipal

EPB

Coal

(Powder)

Dust

Unorganized emission of

dust during the storage and

transportation of coal, ash

and slag

(1) Transport vehicles shall be covered with canopies.

(2) Wind-shield and dust-suppression walls are built around the coal

fields, and water-spraying facilities are provided. Such measures can

reduce the dust at coal field by more than 70%.

(3) The belt room of coal transmission room and coal scuttle of coal

storage room are installed with bag filter to remove the dust.

(4) The coal handling gallery adopts the belt conveyor for closed

transportation.

—

Water

Environ

ment

Waste

water

Production wastewater

mainly includes: circulation

cooling water, wastewater

from reverse osmosis water

treatment system,

acid/alkali-containing

wastewater generated from

preparation of chemical

demineralized water,

domestic sewage, flue gas

desulfurization wastewater,

coal handling system,

wastewater from coal yard,

etc.

(1) Industrial wastewater mainly includes: recycled acid-alkaline

wastewater from chemical water treatment system, backwash

wastewater from filter and reverse osmosis device, resin-containing

wastewater from condensate fine treatment system, wastewater from

boiler cleaning, flushing water of main workshop. The wastewater

drained from the industrial production system enters the industrial

wastewater treatment system to filter the big suspended solids. After

precipitation, the wastewater enters purifying pool before it is used in

coal handling system, spraying coal yard or ash flushing.

(2) The wastewater treatment system is installed which is mainly

used to collect and dispose of the flushing and dedusting water from

coal handling gallery. After precipitation and filter, it can be used

repeatedly.

(3) The desulfurization wastewater, after treated, can be used for dry

ash humidification.

(4) Domestic wastewater, after treated by domestic wastewater

treatment system, is pumped into recovery tank and for dust removal.

Wastewater Treatment

and Reuse Project



37

With the implementation of aforesaid measures, wastewater is totally

utilized in a comprehensive way, and there is no other wastewater

drained outside. Op

eration

Perio

d

Acoustic

Environ

ment

Noise

The noise level of boiler

draught fan, blower, coal

mill, feed pump, steam

turbine, generator and exciter

is generally between 90 ~

100dB (A)

A variety of measures such as noise elimination, sound insulation,

vibration attenuation, etc., are taken to ensure that within the

western, southern and eastern boundary of Yangguang, the noise

emission can meet Category-II standard as defined in Noise Standard

within Boundary of Industrial Site (GB12348-90); and at the

northern boundary the noise emission can meet Category-IV

standard of GB12348-90.

Yangguang

Power

Plant

Yangquan

Municipal

EPB

Solid

Waste Slag

Major solid wastes include

pulverized fly ash, slag and

desulfurization gypsum

(1) The separate ash and slag removal process is adopted. The

pneumatic ash removal system has been installed on #1 and #3

boilers and hydraulic ash removal for #2 and #4 boilers. The ash and

slag are transported to Yangpogou Ash Yard which is 7km away

from Yangguang at the east by slurry pumps, and the dry ash

collectors are installed.

(2) The dry ash are sold to Shitai High-speed Railway Project,

Concrete Mixing Station of Huatong Group, Yangquan Yamei

Cement Factory, Aerated Concrete Masonry Factory to realize

comprehensive utilization.

(3) The desulfurized gypsum is used as the cement additive of

Yangquan Qingshan Cement Co., Ltd. to realize comprehensive use.

Table 5.3-2 Environmental Monitoring Plan during Operation Period

No. Environmental

Factor Monitoring Spot Monitoring Item Monitoring Frequency Contracting Unit Supervisor

Budget

(10,000RMB/year)

Routine Monitoring by Yangquan Municipal Environment Monitoring Station

1 Waste Gas Chimney (Flue) SO2, Dust and NO2 4 Times /Quarter, One Day for

Once

Yangguang Power

Plant

Yangquan Municipal


Station (EMS) and EPB

10.0

2 Noise 1m away from

Factory Boundary Leq

Once/ Year, Once at Daytime

and Once at Nighttime 0.5

3 Wastewater Reused Water pH, SS, COD, Petroleum,

Fluoride, Sulfide and etc. Once to Twice /Year 3.5

Routine Monitoring by Yangguang Environmental Monitoring Station

1 Waste gas Chimney (Flue) SO2, Dust and NO2 Continuous monitoring EL3020 CEMS 10.0

2 Solid waste Plant Area Name, Amount and

Whereabout of Solid Waste Once/Month

Yangguang Power

Plant

Yangquan Municipal


Station (EMS) and EPB

0.5



38

6. Conclusion

To sum up, the completed rehabilitation project has brought outstanding effect of

energy conservation and emission reduction, and is favorable for the improvement of

local environmental quality; meanwhile, Yangguang has adopted environmental risk

mitigation measures and has basically followed EMP and Environmental Monitoring

Plan, and has conducted the routine monitoring on pollution source, so that the

emission standards have been met. However, the monitoring on factory boundary

noise shall be arranged at least once per year and the specified monitoring frequency

on wastewater shall be met.

For the proposed rehabilitation project of #2 boiler, due to the small engineering

amount, and the construction will be conducted inside the plant; therefore, the

environmental impact is slight. During the operation period, the proposed project will

not have any negative impact to surrounding environment; meanwhile, the

implementation of proposed project will reduce the emission of dust, SO2, NOX and

CO2, which will improve the local environmental quality, with good social and

environmental effect, as well as demonstration effect for energy conservation

rehabilitation of thermal power plants. In addition, the environmental risk mitigation

measures and EMP during construction period have been worked out, and the

environmental protection measures during the operation period have been improved

according to the latest requirement of environmental protection; therefore, the

proposed project is favorable for the constant improvement of local environmental

quality.