Abstract:

Abstract:The power of the electric feed pump is larger, and to reduce the usage rate of the electric feed pump can reduce the station service power consumption rate. One auxiliary steam source was added for the turbofeed pump, and the working range of the turbofeed pump was enlarged. Then the turbofeed pump can instead of the electric feed pump during unit startup and shutdown processes, and the auxiliary power consumption was reduced. At the same time, in accident treatment, the unplanned outage time can be reduced. It was verified by the practice of a 300MW thermal power unit that to add the auxiliary steam source can reduce the power consumption of the electric feed pump effectively and can improve the unit operation reliability.

Key words: Keywords:electric feed pump, turbofeed pump, recirculation valve, 300MW thermal power unit