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thermal power plant NTPC singrauli

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it's a ppt on thermal power plant of 2000MW during summer training at NTPC Shaktinagar.

Veröffentlicht in: Ingenieurwesen
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thermal power plant NTPC singrauli

  2. 2.  “A world class integrated power major, powering India's growth with increasing global presence.”  NTPC was set up in 1975 with 100% ownership by the Government of india.  NTPC has installed capacity of 29,394 MW.  It has 15 coal based power station (23,395MW) &7 gas based power station(3,955MW).  4 power stations in joint venture (1794MW)  In 1997, Government of India granted NTPC status of “Navratna” company.  NTPC has embarked on plans to become a 75,000 MW company by 2017.
  3. 3.  Installed capacity 2000 MW.  Location Sonebhadra Uttar Pradesh.  Coal Source:-Jayant Mine.  Water Source :- Rihand Reservoir.  Beneficiary States:- UP, Uttranchal, Rajasthan, Punjab, Haryana, Delhi, Himanchal Pradesh, Chandigarh.  Unit Size:- STAGE 1: 5*200 MW & STAGE2: 2*500MW.
  4. 4. A simplified diagram of a thermal power plant
  5. 5.  Steam generating equipment  Condenser  Prime mover  Electrical equipments
  6. 6.  Boiler  Superheater  Economiser  Air preheater
  7. 7.  A boiler is a closed vessel in which water is converted into steam by utilising the heat of coal combustion.  Steam boiler are broadly classified into following two type: (a)-water tube boiler &(b)- fire tube boiler.  In water tube boiler water flows through the tube and the hot combustion gases flows over these tubes. Water tube boilers are used for high pressure boiler.
  8. 8.  A device which removes last traces of moisture.  It helps in reduction in requirement of steam quantity.  steam being dry reduces the mechanical resistance of turbine.  No corrosion at the turbine blades.
  9. 9.  They are such devices which recover the heat from the flue gases on their way to chimney and raise the temperature of feed water.  Air Pre-heaters recover the heat from the flue gases leaving the economiser and heat the incoming air required for combustion.
  10. 10.  Which condenses the steam at the exhaust of turbine.  It creates a very low pressure at the exhaust of turbine, this helps in converting heat energy of steam into mechanical energy in the prime mover.  The condensed steam can be used as feed water to the boiler.
  11. 11.  A steam turbine is a mechanical device that extracts thermal energy from pressurized steam, and converts it into mechanical energy.  About 86% of all electric generation in the world is by use of steam turbines.  It has almost completely replaced the reciprocating piston steam engine.
  12. 12.  Turbo generator :  An turbo generator is coupled to a steam turbine and converts mechanical energy of the turbine into electrical energy.  It may be hydrogen or air cooled. Rating of turbo generator is normally 200MW & 500MW.  Transformers:  (a) main step-transformers, which steps-up generated voltagetransmission of power.  (b) station transformers, general purpose.  (c) auxiliary transformers, which supply to individual unit-auxiliaries.  Switchgear:  which locates fault on the system and isolate faulty part fromhealthy section.It contains circuit breakers, relays, switches and other controldevices.
  13. 13.  Source of coal=Jayant mines(madhya pradesh).  Location of source=Near singrauli(madhya pradesh).  Distance of source from plant =5km.  Type of coal-D grade.  Coal requirement: 25,000 MT/day
  14. 14.  Generally thermal power stations use coal mills or called coal firing system.  Coal is reduced to fineness (-20mm).  This fine powdered coal is called pulverized coal and is carried forward to the burner by air through pipes.
  15. 15.  A natural result from the burning of fossil fuels, particularly coal, is the emission of fly ash.  Ash is mineral matter present in the fuel. For a pulverized coal unit, 60-80% of ash leaves with the flue gas.  Electrostatic precipitator has series of collecting & emitting electrodes in a chamber.  At the inlet of the chamber there are distributer screen.  Hooper and flushing system form a base of chamber.  Efficiency of ESP is approx. 99.8%
  16. 16. ANY QUESTION ?