Coal Fire Plant

  1. Image Upload 1
    Coal Pile: Aprox. 60 days supply of coal is stored
  2. Image Upload 2
    crusher house: coal is crushed to no larger tahn one inch before being conveyed to the coal bunker
  3. Image Upload 3
    Bunkers contain 24-48 hours of "ready" storage
  4. Image Upload 4
    Coal feeder: coal is fed to the pulverizer at the desiered rate.
  5. Image Upload 5
    Coal pulverizer: coal is pulverized to the fineness of face powder and mixed with hot air which carries the mixture to the burners
  6. Image Upload 6
    Coal burners: The coal-air mixture is combined with the additional hot air and ignited at the burners.
  7. Image Upload 7
    Boiler: Tremendous quantitie of heat are generated by the combustion process in the boiler furnace
  8. Image Upload 8
    Forced draft fan: air for the combution process originates at the forced draft fan
  9. Image Upload 9
    Air heater: exhaust gases from the boiler are used to heat air from the forced draft fan on its way to the burners
  10. Image Upload 10
    Boiler Feed Pump: water for the boiler is taken from the deaerator storage tank and pumped to the boiler through the high pressure feedwater heaters which are heated by team bled from the turbine
  11. Image Upload 11
    Economizer: feedwater travels through the economizer where it is heated by the exhaust (flue) gases
  12. Image Upload 12
    Steam drum: The heated water leaves the economizer and enters the steam drum where it circulates through the steam generating tubes of the boiler. the heat added in the boiler produces steam in the top of the drum
  13. Image Upload 13
    Superheater: Steam from the steam drum tavels to the superheater where additional heat is dded producing steam often as hot as 1050°F
  14. Image Upload 14
    High pressure steam main: piping through which the steam passes to the turbines
  15. Image Upload 15
    Turbine: steam expands as it passes through the blades of the turbine causing the rotor to spin inside the generator
  16. Image Upload 16
    Reheater: steam from the high pressure turbine is reheated to 1000°F and returned to the intermediate presure and low pressure turbines
  17. Image Upload 17
    Generator: the generator produces electricity
  18. Image Upload 18
    Exciter: the exciter produces the magnetic field of the generator
  19. Image Upload 19
    Step-up Transformer: the voltage of the electricity produced by the generator is increased to transmission voltage - often as high as 345,000 volts
  20. Image Upload 20
    Condenser: the steam exhausting from the turbine is cooled and condensed by passing over tubes containing cooling water
  21. Image Upload 21
    Cooling tower: The water for the condenser passes through this tower, where it is cooled and returned to the condenser
  22. Image Upload 22
    Condensed water pump: The condensed steam is pumped through the low pressure heaters, where it is heated by portions of low pressure steam extracted from the turbine, and dearerator and then on to the deaerator storage where it is recycled.
  23. Image Upload 23
    Demineralizer for the make-up water: water and steam losses in the total cycle are repenished with purified (demineralized) water at the condenser.
  24. Image Upload 24
    Ash hopper: Heavy ash produced by the combustion process is colected in the bottom ash hopper
  25. Image Upload 25
    Environmental control equipment: either electrostatic precipitators or baghouses collect more than 99% of the dust from the coal smoke.
  26. Image Upload 26
    Induced Draft Fan: This large fan draws gases from the fly ash collector and dischafrges them into the chimney.
Card Set
Coal Fire Plant
Aprentice test