coal to electricity (2)
TRANSCRIPT
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COAL TO ELECTRICITY
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POWER PLANT
Power plant is to generate power by
converting the fuel energy availability
into work in the form of electricalenergy in the most efficient manner
taking into the consideration of cost,
space, safety and environmentalconditions.
PHOTO
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Schematic Diagram of a Steam Power Plant
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Simple Steam Power Plant
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BOILER
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Technical features Pressure PartsAREA STAGE-I STAGE-II STAGE-III
WW F& R- 181 & L&R- 131
(2117) Size: 63.5 X 6.3
SA 210 Gr A1
F&R 181 & L&R 130
(2371) Size: 63.5 X 5.5
SA 210 Gr C
F&R 181 & L&R 130
(2516) Size: 63.5 X 5.6 SA
210 Gr C
Platen 29 (922) SA 213 TP 304,
SA 213 T11, SA 213 T22
29 (1097) SA 213 TP347H
SA 213 T22, SA 213 T91
29 SA 213 TP347H
SA 213 T22 SA 213 T91
RH 59 (3105) SA 209 T1,
SA 213 T11, SA 213 T22
59(3078) SA 213 T22,
SA 213 T91,SA 213
TP347H
59(3100) SA 213 T22 SA
213 T91 SA 213 TP347H
FSH 119 (1290) SA-213 T22
* Total Heating area (FSH,
Platen & LTSH) 7662
119 (1543) SA-213 T91
* Total Heating area (FSH,
Platen & LTSH) 6340
119 SA 213 T22,SA-213
T91
* Total Heating area (FSH,
Platen & LTSH) 9864
Eco 145 (3760) Single BankSA 210 Gr A1
145(5617) Double BankSA 210 Gr A1
170(6100) Double BankSA 210 Gr A
LTSH 120(5450) Double Bank
SA 209 T1, SA 210 Gr A1
120 (3700)Single Bank
SA-213 T11
120 DoubleBank
SA-213 T11
Total heating surfacearea
(Eco+SH+RH+WW+platen)
16644 m2 17406 m2 21580 m2
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BOILER LOSSESS
Boiler Eff.
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TURBINE
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H P TURBINE MODULE
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I P TURBINE ROTOR
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LP TURBINE
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DESCRIPTION STAGE- I STAGE-II STAGE-III
HP TURBINE 25 STAGES 25 STAGES 25 STAGES
IP TURBINE 20 x 2 STAGES 19 x 2 STAGES 19 x 2 STAGES
LP TURBINE 8 x 2 STAGES 8 x 2 STAGES 8 x 2 STAGES
CONTROL VALVE
TYPE
EV160 EV 200 EV 200
REHEAT VALVE TYPE IV320 IV 320 IV 320
CONDENSER TUBEMAT.
CUPRO NICKEL STAINLESS STEEL STAINLESS STEEL
CONDENSER COOLING
WATER
RAW WATER CLARIFIED WATER CLARIFIED WATER
CONDENSER COOLING
WATER FLOW
27500 T/Hr 22500 T/Hr 22500 T/Hr
NO. OF TUBES IN
CONDENSER
19218 16653 16653
VACUUM P/P OR
EJECTOR
EJECTOR VACUUM PUMP VACUUM PUMP
TECHNICAL FEATURES - TURBINE
DESIGN DATA TURBINE HEAT RATE
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DESIGN DATA TURBINE HEAT RATE
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HPT EFFICIENCY
Turbine Eff.
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IPT EFFICIENCY
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GENERATOR
GENERATOR STATOR
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GENERATOR STATOR
GENERATOR STATOR
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GENERATOR STATOR
GENERATOR
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GENERATOR
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SWITCHYARD
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CONDENSER
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CONDENSER
Power plant cycle efficiency depend upon steam parameters i.e. steam inletpressure, temperature and condenser vacuum. Due to metallurgical
constrain we cannot go more than the prescribed limit.Due to big size and negative pressure in condenser, always chances ofingress of air from atmosphere causes poor vacuum in condenser.Losses in condenser vacuum widely depend upon cooling water flow,cooling water inlet temp. and condenser tube healthiness. Likeheaters TTD is most important in condenser also.
TTD = T sat - ToWhere as
TTD = Thermal temp. difference
T sat = Saturation temp. of steam at condenser back pressure in 0C
To = Cooling water outlet temp.
DP Pressure drop across the condenser
Deviation of condenser back pressure depends upon three factors:-1. Back pressure deviation due to CW inlet temp.
2. Back pressure deviation due to low CW flow.
3. Back pressure deviation due to dirty condenser tube / air ingress.
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CONDENSOR EFFICIENCY
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500 MW STATION
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STACKER RECLAIMER
COAL YARD &
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COAL YARD &STACKER RECLAIMER
COAL YARD &
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COAL YARD &STACKER RECLAIMER
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COAL UNLOADING FROM SHIP
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COAL UNLOADING FROM SHIP
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TG HALL
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