CONDENSATE EXTRACTION PUMP

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CONDENSATE EXTRACTION PUMP

SYSTEM DESCRIPTION

  1. Condensate from condenser hot-well is pumped through LP heaters up to deaerator by Condensate Extraction Pumps (3 nos. CEP). 
  2. In full load operation two pumps will be in operation and one in standby condition.
  3. CEP is of vertical sleeve type multi stage pump. 
  4. So it is called as turbine type pump.
  5. Each pump is directly driven through an electric motor and is delivering to condensate water.
  6. All the CEP are connected to a common header through a non-return valve and motorized discharge valve.
  7. From that discharge header condensate passes through Gland Steam Condenser (GSC) and through a Deaerator control station.
  8. By modulating this valve Deaerator level is maintained according to the set point given.
  9. A recirculation valve is provided before Deaerator level control valve to maintain a minimum condensate flow through the pump & GSC.
  10. The main condensate is passed through Condensate Polishing Unit, GSC, LP heater-1, LP heater-2, LP heater-3 and finally goes to deaerator.

From CEP discharge following water supplies are provided-
  1. DMCW expansion tank makeup.
  2. Vacuum pump separator tank normal make up.
  3. Sator normal make up.
  4. HPDFT & LPDFT spray for desuperheating.
  5. TD BFP Gland seal de super heater 
  6. Condenser Exhaust hood spray 
  7. LP  bypass desuperheating
  8. TD BFP exhaust steam desuperheating
  9. MS to APRDS  steam desuperheating.
Make up for condensate system may be taken from Hot well makeup pump or makeup line in CST is installed on deaerator floor.


  •  Special care to be taken during any CEP startup when condenser is under vacuum in any condition. 
  • In this condition open canister vent to condenser slowly and watch the vacuum & then start opening the suction valve slowly. 
  • Ensure vacuum is not dropping.
  • Charge the suction header slowly.



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