When the motor directly connected feed pump starts, the pump speed rises from zero to rated speed in a short time, and there is no means to control the speed. Especially in the early stage of boiler ignition, the feed water flow is small,

One, the main basis for the selection of motor pump (1) According to the mechanical load nature and production process of motor starting, braking, operation, speed regulation and other requirements, select the motor type. (2) According to