2. Introduction1. Suratgarh thermal power station is the first super thermal power Station of Rajasthan with total installed capacity of 1500 MW.2. Suratgarh super thermal power station is located 27 km away from Suratgarh town in Ganganagar Dist. on the left bank of IGNP at Up Stream of Suratgarh Barrage.3.This station is operated and maintained by Rajasthan Vidhyt Utpadan Nigam Limited.
3. S.S.T.P.S. is designed in six stages•STAGE I - 1x250 MW•STAGE II - 1X250 MW•STAGE III - 1X250 MW•STAGE IV - 1X250 MW•STAGE V 1X250 MW•STAGE VI - 1X250 MW•STAGE VII- 1X660MW(Under construction)•STAGE VIII- 1X660MW(Under construction)Total Power Generation - 1500 MW
4. BLOCK DIAGRAM OF THERMALPOWER PLANT
5. Raw coal from bharat To SSTPS from gudla Wagon coal ltd. Dhanbad & via a single railway tippler bilaspur(MP) track bunkers Crusher house hoppers Raw coal Coal mills feeders (pulverization) Boiler furnace ( tangential firing of pulverized coal)
6. Steam Boiler1.The utility boilers are large capacity steam generators used for the electrical power generation.2. In boiler heat energy is released from the combustion of fossils fuel and heat is transferred to different fluids in the system.3. The boiler installed in S.T.P.S. are single drum, tangential fired water tube naturally circulated over hanged, pulverizing coal firing with a max. Continuous steam output of 375 tons/hour at 138 kg/cm2 pressure and 5400C temperature.4. Heat transfer section in boiler 4.1 Furnace : Furnace is the primary element part of theboiler where the chemical is obtained by combustion.
7. BOILER: stack Super Boiler water tubes DM water heated & various stages steam Flue gases Air from Boiler Ash environment furnace handling via draft fans plant Pulverized coal
8. 2.The major fuels used in the steam generation are coal oil and gas.3. In furnace the whole combustion region is surrounded by tubes through which water flows. BOILER AUXILLARIES4.2 SUPER HEATER: Superheats are meant to raise thetem. of steam by absorbing heat from flue gases steam them.2. Super heater eliminates the formulation of condensate during transporting of steam in pipelines and inside the early stages of turbine, which is harmful to the turbine blades and pipelines .3. Superheated steam is led into the H.P. turbine through main steam stop valve. After doing the useful works in the H.P. turbine the
9. steam is returned to reheater through the cold reheat lines.4. The superheataer may be made in the form of coils andplatens.4.3 Reheater: Reheater are used to raise the temp. of steamfrom which point the energy had been extracted in H.P.turbine with increasing no. of reheating stages. Reheating iscontinuing till temp. of steam is reaches to 5400C.2. Superheaters and reheaters tubes are made of 50 to 75mm outside diameter.4.4 Economizer :The function of an economizer in a steam-generatingunit is to absorb heat from the flue gases and add this as sensible heat to fed water. It acts like feed water heater.
10. The size of economiser tubes are 45 to70mm in outsidediameter .The water flow must be uniform to avoid the steam formationin economiser.4.4Air Preheater:Air preheater is a heat exchanger in whichpreheating of air done by transferring heat from the flue gasbefore supplying to the combustion chamber.For bettercombustion the air temp.250to350 is always desired .The preheating of air results:1.Improved combustion2.Saving in fuel consumption3.Thermal efficiency.
11. Flow of steam SuperBoiler Boiler turbine heaters &drum tubes reheater condenser economiser FWP DM water plant
12. Steam turbineTurbine is a prime mover in which a shaft is rotate byimpact or reaction of stream of working substance( steam, water, gases etc) upon blades of a wheel. Itconverts the potential or kinetic energy of the workingsubstance into mechanical power by dynamic actionof working substance. When the working substance issteam it is called the steam turbine. There are no. ofblades alternatively fix & rotate due to which velocityis increased & pressure is decreased.Principle of operation : . The steam is caused to fallin pressure in a passage of nozzle: doe to this fall inpressure a certain amount of heat energy is converted
13. In to moving with a greater velocity. The rapidly moving particles of steam suffer a change in direction ofmotion which gives change of momentum and therefore to a force.IMPULSE TURBINE: The passage of steam through movingpart of turbine in such a manner that the pressure at the outletside of the blade is equal to that at the inlet inside. Such aturbine is broadly termed as impulse turbine.IMPULSE REACTION TURBINE: Pressure of the steamat outlet from the moving blade may be less than that at theinlet side of the blades; the drop in pressure suffered by thesteam during its flow through the moving causes a furthergeneration of kinetic energy within the blades and adds to thepropelling force which is applied to the turbine rotor. Such aturbine is broadly termed as impulse reaction turbine.
14. MOVING BLADES
15. FIXED BLADES
16. Rotor Layout
17. High pressure turbine: The HP turbine consists of 25reaction stages. The moving and stationary blades areinserted into appropriately shapes into inner casing and theshaft.Intermediate pressure turbine: The steam from HPturbine after reheating enters the inner casing from aboveand below through two inlet nozzles.The IP turbine consists of 20 reaction stages per flow. Themoving and stationary blades are inserted in appropriatelyshaped grooves in shaft and inner casing.Low pressure turbine: Steam admitted to LP turbinefrom IP turbine flows into the inner casing from both sidesthrough steam inlet nozzles.
18. GENERATOR: MECHANICAL ELECTRICAL ENERGY ENERGY TWO POLE TYPE; WITH CYLINDRICAL ROTOR BASIC PRINCIPLE :FARADAY’s LOW OF MAGNETIC INDUCTION COOLING: STATOR WINDING-DIRECT WATER COOLING ROTOR WINDING – HYDROGEN COOLING