Presentation On Sea Water Flue Gas Desulperisation System

Why FGD? Burning of fuels like Coal & oil produces a colourless

Gas - Sulphur Di-Oxide So2 is very harmful to the environment & we know

that it causes Acid Rain; harm ful to plants environment

&

By employing FGD units, S02 emissions are cut down;

thus we will strive closer to a clean environment

Current Methodologies Dry Absorption injection Systems

Spray Dry scrubbing (using sorbet slurries) Wet Scrubbing

Emission Guarantees So2 Removal Ph COD increase

-

89% 6.5 2.5 mg/Ltr 60 % @ 20- 25 Deg C 70 Deg C

DO Dissolved Oxygen Stack Inlet Gas Temp -

Emission Guarantees Sea Water Temperature rise Increase of TSS Power Consumption

-

4 Deg C 10 ppm 38 MW (3 units)

The ProcessSea Water

Flue Gas

Dust Removal

So2 Absorption

Reheat

Treated Gas

Sea Water

Sea Water Treatment Plant

Air

Treated Sea Water

FGD System ComprisesGas CircuitBooster fan GGH Absorber

Water CircuitDilution Pump House Absorption Pump House

SeaWater Treatment PlantAeration Fans

FGD System ComprisesAuxiliary/ Common SystemCooling Water Pump HouseCCC Pumps ACW Pump

Chlorination System Compressed Air System

Single Line Diagram

ReactionAbsorption SO2 + H2O SO32- + 2H-

So2 is absorbed in sea water

ReactionOxidation SO3 2- + 1/2O2 SO4 2(Sulphate ions)

SO3 2- Consumes oxygen to form sulphate Sea Water is further oxygenated to complete the oxidation reaction, and to bring the Dissolved oxygen to an environmentally acceptable level

ReactionNeutralisation HCO3- + H+ Co2 + H2O

Bicarbonate ions in the sea water react with hydrogen ions, hence neutralises the acidifying effect of the sulphur oxidation and thereby raising pH

Gas Circuit

Single Line Diagram

Gas Circuit70 Deg C 136.9 Deg C

Outlet Damper FGD Bypass Damper FGD Inlet Damper

Booster Fan Type of Fan Blade Type Rated Capacity Suction Pressure Static Pressure

-

Axial FlowVariable Pitch Blade 25,20,000 Nm3/hr 100 Pa 3100 Pa

Temp/Density of gas Rated Power of Motor

-

136 deg/ 0.886100 kw

GGHGas to Gas Heater As the name implies it takes heat from the hot flue gas

and reheat the clean flue gas coming out of the absorber and let it to the chimney

GGH Type Heating Surface area Speed of rotation Drive

-

Bi-Sector8600 sq.m 2 rpm Motor Driven

Absorber Absorber is a concrete structure which houses the sea

water distribution pipes & fill packs It acts like a cooling tower

Flue gas to Seawater interaction takes place And So2 is absorbed from flue gas by sea water and

clean gas leaves to GGH

Absorber

Absorber Lining Lining Material Make

Ceilkote 242 MR FlakelineAkzo Noble International Paint Co Ltd., 2.5 to 3.2 mm 48 hrs

-

Coating Thickness Curing Time

-

Water Circuit

Single Line Diagram

Dilution Pump House It takes water from sea water reservoir

Pumps

the water to Absorption pump house

forebay/Distribution Channel

And Part of the water is sent to aeration basin for

diluting the effluent water

Steel Gate

Trash Rack

Dilution Pump House

Travelling Screen

Dilution Pump Capacity Head Speed

-

35000 cum/hr 11.3 m 370 rpm

Motor Capacity MOC Casings Shaft

1500 kw , 11 KV

-

HT200Ni2Cr022Cr22Ni5Mo3N

Absorption Pump House Pumps the sea water to absorbers located in unit 7, 8 &

9 for absorption of so2 from flue gas through FRP

piping.

Absorption Pump House

Absorption Pump Capacity Head

-

15700 cum/hr 18.2 m

Speed

-

495 rpm1100 kw , 11 KV

Motor Capacity -

Sea Water Treatment Plant

Aeration Fans - Function Takes air from atmosphere

Pressurises and send the air to distribution pipes,

which are submerged by the effluent water from absorber. Thereby Dissolved oxygen is increased in the water &

discharged to outfall channel.

Aeration Building Cross Sec

Aeration Fans - Spec Type Flow

-

Radial Flow Fan 27.07 cum/s (110 TPH)

Pressure Speed

-

30 kPa2970 rpm

Motor Capacity -

1120 kw, 11 Kv

Auxiliary Systems

Cooling Water Pump House Function of cooling water pump house is to provide

cooling water for HT motors & cooling of lub oilsystem & equipment bearings

Cooling Water Pump House It comprises CCW Pumps

ACW Pumps Plate Heat Exchangers Rotary Filters

Cooling Water System - SLDDM Water from Phase IV OH Tank

CCCW Pump

ACW Pump

PHETo BoosterFan To Compressor To Chlorination Sys To Dilution pump To Absorption Pump To Aeration System

Forebay

CCCW Pump Capacity Head

-

1562 cum/hr 41 m

Speed

-

1480 rpm250 kw , 11 KV

Motor Capacity -

ACW Pump Capacity Head

-

2015 cum/hr 17.6 m

Speed

-

980 rpm160 Kw, 415 v

Motor Capacity -

Chlorination System

Purpose To dose the chlorine in the intake channel of Dilution

Pumps It controls microbes like algae

Acts against Odor

Chlorination System- SLD

Booster Pump 120 Cum/hr Filter Hypo-Chlorite Generator

Hypochlorite Storage Tank

Sea Water From ACW SystemDosing Pump 192 Cum/hr To Dilution Pump Intake

Chlorination Sys - Spec Type Generation Capacity

-

Electrochlorination 2 x 186 kg/hr

Sea Water Booster Pump Continuous dosing Pump

-

120 cum/hr (3 Nos)192 cum/hr (2 nos)

Hypochlorite Storage Tank

-

50 cum (3 nos)

Compressed Air System Type of Compressor Capacity

-

Screw Compressor 35 cum/min

Pressure Speed

-

1 mpa2980 rpm

Power

-

260 kw, 11 Kv

Electrical Scheme220 KV Line 1 from Phase I 220 KV Line 2 from Phase I

220 KV Bus 1 220 KV Bus 2

66/ 11 Kv 11 Kv Bus

Dilution Pump

Booster Fan

Absorption

Aeration

CCW

Chlorination

An Overview Civil StructuresName of Structure ABSORBER Absorber (Unit #7,#8,#9 each) Duct Support (Unit #7,#8,#9 each) Booster Fan (Unit #7,#8,#9 each) SWTP Dilution Pump House Absorber Pump House Cooling Water Pump House Aeration Basin 16,150 2,650 400 10,800 1,800 750 700 Appx. Concrete (CUM) Total Concrete (CUM) 9,750 5,400 2,250 2,100 52,100 16,150 2,650 400 10,800

Aeration EnclosureOutfall Channel Chlorination Building EC Building ( 2 Nos) GRAND TOTAL

3,0504,650 650 750

3,0504,650 650 1,500 58,000

An Overview Mechanical StructureCommon System1 2 3 4 5 6 7 8 9 10 Dilution Pump house steel structure & EOT Dilution Pumps - 5 nos Absorption PP house steel structure & EOT erection Absorber Pumps -4 Nos. Compressed Air system ACW/CCCW system Chlorination system DG House structure + DG Set FGD Pipe / Cable Rack Str. Cooling water and service water piping MT MT MT MT MT MT MT MT MT MT 400 400 388 240 80 100 65 80 350 130

11

FGD GRP PipeTotal

MTMT

27124945

An Overview Mechanical StructureUnit 7 Equipment1 2 3 4 5 6 7 8 Unit-7 FGD Gas duct support Str Unit-7 Ducts Unit-7 Booster Fan Unit-7 GGH steel structure Unit-7 GGH Proper Aeration Fan enclosure #7 - 03 Nos. Unit-7 Seal Fir fan-2 nos Unit-7 Absorber Total MT MT MT MT MT MT MT MT MT 340 670 112 260 313 54 30 90 1869

An Overview Mechanical StructureSummary

Common System Unit 7 Equipment Unit 8 Equipment Unit 9 Equipment

-

4945 MT1869 MT 1868 MT 1868 MT

Total

-

10550 MT

Benefits/ Features of SWFGD Simple & reliable Proven Technology

Uses only sea water & air No by-product handling No Chemicals Addition Fully automated operation Meeting emission standards

Thank You