GHE (Gas Heat Exchanger) LT ECO PPT.pdf
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Transcript of GHE (Gas Heat Exchanger) LT ECO PPT.pdf
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GREENS
Steel H Economizer
And
Gas Heat Exchanger
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Steel H Tube is extended surface tube
with H shaped Plate Fins fused to the
tubes
Extended surface assists improved
heat transfer rates
About 2 to 4 times increased Heating
Surface Area than plain surface in unit
volume of Space
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Advantages of Steel H
Compact Size
Low Pressure Loss
Less Tubes and Weight
Lower Costs
Proven Heat Transfer Rates
Double H Inherent Stiffness
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Low Temperature Economizers are the
Steel H Economizers used at Up or
Downstream of ESP
Generally called as GAS HEAT
EXCHANGER (GHE) for Power StationBoilers
GHE are used to enhance the systemefficiency
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Objectives of GHE
Reduces the exhaust gastemperature from 160 ~ 170 Deg Cto about 120 Deg C
GHE shall assist to reduce the inletgas temperature of
1. Desulphurization / Denitrificationequipment
2. Next generation ESPs
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Methods
of Incorporation
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Placed between ID Fan and FGD
Heat from the flue gas is used to heat
water Hot water drives Vapour Absorption
Heat Pump
VAHP produces chilled water for
central air conditioning
GHE
FGDID FanESP
Stack
FD Fan
APH
TO DRIVE VAHP FOR CENTRAL AIR
CONDITIONING
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GHE 1
FGDID FanESP
Stack
FD Fan
GHE 2
GHE 1 is Placed between ID Fan and FGDGHE 2 is Placed before ESP
Heat from the flue gas is used to heat
water by GHE 1 and then by GHE 2
Hot water is used to drive VAHPVAHP provides chilled water for
Central Air Conditioning
Hot water can also be sent directly to
main economizer
APH
TO DRIVE VAHP FOR PRODUCING
CHILLED WATER
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GHE FGDID FanESP
Stack
FD Fan
Placed between ID Fan and FGD
Heat from the flue gas is used to heatwater
Hot water then heats the air from
Primary Air Fan
APH
TO PREHEAT THE AIR
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GHE
FGDID FanESP
Stack
FD Fan
APH
Placed between ID Fan and FGD
Heat from the flue gas is used to heat
the over cooled flue gas after FGD The temperature of the flue gas is
controlled to maintain the temperature in
stack
TO MAINTAIN THE TEMP IN STACK
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GHE FGDID FanESP StackFD Fan
APH
FD FanSteam
Turbine
LP HeaterSteam Extracted
from Turbine
Condensate Inlet
Condensate
Outlet
Steam Condensate
Outlet
Placed between ID Fan and FGD Heat from the flue gas is used to
condensate from turbine
Hot condensate is then joined with the
outlet of LP Heater
TO HEAT THE STEAM CONDENSATE
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GREENS
Steel H EconomisersSupplied
ININDIA
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BALCOKORBA
270 MW BCPP (4 X 67.5 MW)
4 x 275 TPH Boilers
3 units installed
1 unit to be installed in next shutdown
Performance of proposed design provides
additional 10% duty
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Existing Economiser GreensEconomizer
Type of Surface Unit Finned TubeCombination of Finned &
Plain Tube
Number of Plain Tubes 0 112
Number of Finned Tubes 896 1232
Finned Length Mm 4280 4250
Tubes High 16 24
Tubes Wide 56 56
Water Paths 56 56
No. of Tiers 3 2
Tube diameter mm 51 44,5
Tube thickness mm 4.5 avg (assumed) 4.5 min
Tube material BS3059-2, Gr 440 ASME SA210-C
Fin thickness mm 2 3
Fin pitch mm 18 25 (50 top bank)
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ExistingEconomiser
GreensEconomiser
Flue Gas TemperatureEconomiser inlet C 529 529
Economiser outlet C 398 384.5
Flue Gas Flow rate t/h 565.2 565.2
Flue Gas Velocity,
Eco Inlet, (avg)m/s 21
18.5
(inlet to bottom
bank)
Gas Draft Loss (overheating surface only)
mm WG 54 53
Feed Water Flowrate t/h 190 190
Economiser inlet bar 107 107
Feed Water Pressure
Loss (friction only) bar 0.2 0.6
Feed WaterTemperatureEconomiser inlet C 209 209
Economiser outlet C 300 308
Heat Duty MW 23.6 26
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Essar ESSAR, VADINAR 77 MW COGEN PLANT
Total 3 units. 1 unit under installation
Next 2 units will be installed in Next shut downs
Boiler 175 TPH Babcock Make
OPERATING PRESSURE 81.5 KG/Cm2TEST PRESSURE 122.25 KG/Cm2WATERInlet Temperature 175 COutlet Temperature 256 CFLUE GASInlet Temperature 500 COutlet Temperature 210 CTOTAL HEAT DUTY 17900 KW
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Size Material
TUBEDIA 38.0 MM OD X
3.2 MM THICKNESS
DIN 17175 St 35.8 III(EQUIVALENT
SA 210 A-1)
HEADER PIPE DIA 219.1 OD X14.2 MM THICKNESS
DIN 17175 15Mo3
(EQUIVALENT
SA 335- P1)
FINSSIZE 150 MM LONG X
2 MM THICKNESS
DIN StW 22
44 NOS OF
FINNED COILSPITCH 75 MM
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Economizer at our
factory
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Economizer at our
factory
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Hindalco
RENUSAGRPOWER
DIVISION
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RENUSAGAR Thermal Power
Station 740 MW
1 unit 70 MW under OPERATION
Heating Surface 2840 m2
No of coils 57
Fin pitch 25 mm
Material
Tubes SA 210 Gr C
Fins JIS 3131 Gr SPHC
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Unit Existing ModifiedFeed Water t/hr 275 275
Economizer Inlet C 230 230
Economizer Outlet C 285 295
PressureKg/cm
(g)107 107
Total Pressure Drop (friction) Kg/cm 2.1 1.8
Flue Gas Flow rate T/hr 388 388
Flue Gas Temperature
Economizer Inlet 550 550
Economizer Outlet 375 340
Flue Gas Velocity
Maximum Gas Velocity m/s 10 10
Total Draft Loss
(Over Heating Surface Only)mm WG 24 24
Heat Duty MW 20.5 24.5
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Hindalco
Industries Ltd.Renukoot
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Unit Existing ModifiedFeed Water Flow Rate t/hr 90 90
Feed Water Temperature
Economizer Inlet C 99 99
Economizer Outlet C 117 135-145
Feed Water Pressure Kg/cm (g) 66 66
Total Pressure Drop (friction) Kg/cm 0.5
Flue Gas Flow rate T/hr 142.7 142.7
Flue Gas Temperature
Economizer Inlet 242 242
Economizer Outlet 174 135-140
Flue Gas Velocity
Economizer, Average m/s 8-9
Total Draft Loss
(Over Heating Surface Only)mm WG 25
Heat Duty MW 2.0 3.7-4.7
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ECO 1 to be replaced byGreens Steel H Economizer
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Eco 1 is used to heat the feed water
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VEDANTATalwandi Sabo Power Ltd.
3 x 660 MW thermal power plant
Plant at District Mansa, Punjab
Talwandi Sabo Power Limited is a
subsidiary of Sterlite Energy Ltd.
Boiler supplied by Harbin Boiler
Co Ltd.
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Gas Heat Exchanger
Supplied byGreens Power EquipmentIndia Pvt Ltd
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R.K.M.Powergen Pvt Ltd.Uchpinda, CG
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4 X 360 MW Thermal Power
Plant
4 Units of Gas Heat Exchanger
is Supplied
GHE will be used to driveVapour Absorption Machine of
capacity 4 x 200 TR
GHE is under installationphase
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Greens Offers
Process and Design analysis for feasibility
Waste Heat Recovery Techniques
without hindering in current operation
Cost saving methods by conserving the
valuable resources
Participation in making the plant environment
friendly
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Thank You