珠江电厂300MW机组循环水泵增流改造

针对珠江电厂循环水泵供水不足、泵叶片强度不够等问题, 对循环水泵进行了增流节能技术改造。在不改变原水泵配套电机、泵壳和管道等的条件下, 将叶片安放角从原设计角度逆时针加大 3°, 且对叶片型面进行适当的修正, 同时将原组合式叶轮结构改为整体铸造结构, 并优化叶轮加工工艺, 通过这一系列的改进达到了提高叶片强度, 增加循环泵流量的目标。试验证明, 技术改造可提高电厂的经济运行水平和安全可靠性, 其经济效益十分显著。

Flow-increasing retrofit of circulating water pumps for 300 MW generating units in Zhujiang Power Plant

In view of the insufficient water supply and blade intensity of the circulating water pumps in Zhujiang Power Plant,the circulation water pumps were retrofitted with the aim of increasing flow and saving energy.Without changing the original motor,pump case and pipes,etc,the blade angle was increased by 3 degrees counterclockwise;the blade moulding surface was modified suitably;the combined type impeller was changed to monoblock cast impeller,and the manufacturing procedures for the impeller optimized.All these measures enhance the blade intensity and increase the flow of the circulating pumps,thus improving the economic efficiency and the reliability of the plant with significant economic benefit obtained.