How to start a boiler water pump?
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How to start a boiler water pump? On March 8, 1996, a 300,000-ton ammonia synthesis plant came to a complete stop due to the breakage of the shaft of the high-pressure boiler water pump (motor-driven); repairs took 8 weeks. After the plant’s maintenance work, it was set to be put back into operation on March 15. However, problems arose during startup: high-pressure boiler water is required to generate steam at various pressures; the pump for the high-pressure boiler needs medium-pressure steam; and medium-pressure steam, in turn, requires boiler water to operate the temperature and pressure reduction units. Ask how to drive?
After the first start-up of a high-pressure steam boiler, the pressure is increased gradually. Why is medium-pressure steam required to start the boiler feed pump? If there are any suggestions, it would be best if the original poster included a flowchart.
The 300,000-ton ammonia synthesis plant is located 1,000 meters away from the boilers; the steam supplied has a pressure level of 10.0 MPa for superheated steam and 0.5 MPa for saturated steam. Within the ammonia synthesis system, the steam pressure levels are 3.3 MPa for superheated steam and 1.1 MPa for saturated steam. There are two high-pressure boiler feed pumps: one is electrically driven, and the other is driven by 3.3 MPa superheated steam.
There’s no way it will work without steam; we must find a solution involving steam. 1. The turbine has been properly warmed up and is ready for operation. 2. Medium-pressure steam is used to warm the pipes along with high-pressure steam; when the temperature reaches 300°C, the turbine is started up, and the water for the high-pressure boiler is then available. 3. Activate the medium-pressure temperature and pressure reduction device; the medium-pressure steam pipeline network is established normally.