How to Control Gas When the Shaft Seal Electric Heater is Working - Yangzhou Darui

Darui Electric recommends for you
Abstract: The main function of the shaft seal electric heater is to extract the mixed gas in the steam turbine sealing system, preventing gas from leaking from the seal end to the turbine hall and oil system, thereby polluting the environment and damaging oil quality. The gaseous substance enters the shaft seal electric heater and is cooled into water, heating the condensate, and the remaining uncondensed gas is discharged into the atmosphere.

  The main function of the shaft seal electric heater is to extract the mixed gas in the steam turbine sealing system, preventing gas from leaking from the seal end to the turbine hall and oil system, thereby polluting the environment and damaging oil quality. The gaseous substance enters the shaft seal electric heater and is cooled into water, heating the condensate, and the remaining uncondensed gas is discharged into the atmosphere.

If the drainage backflow resistance is increased, the drainage of the shaft seal electric heater passes through multiple stages of water seal and then returns to the condenser steam side at a certain height. The flow resistance plus height difference is exactly equal to the condenser vacuum, which is normal.
  Using the shaft seal electric heater gas return method to heat condensate reduces heat loss; the shaft seal electric heater operates in a slight negative pressure state, with a pressure of about -6kpa, and a vacuum pressure difference of about 10m from the condenser. According to the working principle of multi-stage water seal, this multi-stage water seal must generate a resistance of more than 10m during operation to ensure smooth drainage and prevent air leakage.
  From the shaft seal electric heater to the condenser, the multi-stage water seal is a 4-stage water seal, each stage of the water seal barrel is about 3 meters high. The structure of the multi-stage water seal is analyzed. The function of the multi-stage water seal: maintain the shaft seal heater drainage water level, protect the vacuum state. Once the water in the multi-stage water seal is full, its water level remains basically unchanged.

Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.