Abstract: The booster pump of the turbinedriven feed pump of 670 MW supercritical unit in Huadian Weifang Power Generation Company Limited is FA1D67 single stage double suction centrifugal pump. The operation stability of the pump is poor, and there are obvious safety defects in the pump. The pump was repaired many times, but the repair effects were little, and the pump is still a serious menace for the safe and economic operation of the unit. By test and analysis, the root of the problem was found out. The impeller and the volute were reformed and optimized. The problem was solved, and the safety and economic efficiency of the unit operation were improved effectively.

Key words: turbine-driven feed pump, booster pump, impeller, volute, optimization