Causes of vacuum sudden drop in vacuum pump switching and its treatment

Vacuum pump in the course of the process there may be some glitches, today we talk about the causes of the vacuum pump vacuum pump switching process and processing methods.

First, the vacuum pump vacuum collapse reason analysis:

1, vacuum pump inlet pneumatic door and anti-door jam astringent;

2, improper operation, did not confirm the entrance pneumatic door has been closed, stop the vacuum pump.

Second, the main phenomenon of sudden vacuum collapse:

1, the vacuum exhaust device rapid decline in low vacuum alarm;

2, vacuum pump gas-water separator level down.

Third, the vacuum dip processing measures:

1, # 1 vacuum pump stopped and found that the vacuum drop, immediately start the # 3 vacuum pump.

2, immediately make local staff open water separator water solenoid valve manual door to the water separator to high water.

3, if the vacuum is still falling, no back trend, so that local staff immediately off the # 1 vacuum pump inlet pneumatic door and pneumatic door in front of the manual door, and Kai # 3 vacuum pump.

4, vacuum drop too fast, you should manually reduce the load to 400MW below, to prevent the unit trigger RB, RB action, according to RB normal processing.

5, if the treatment is not timely, the vacuum is too low, resulting in turbine trip, press the emergency shutdown.

Fourth, the vacuum drop prevention measures:

1, a major operation to implement guardianship system;

2, switching the correct way to switch, and make all possible assumptions;

3, shutdown the vacuum pump can be closed when the entrance door, confirm shut down before stopping the pump.

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