Successful Application of Permanent Magnet Speed Regulation Technology in Power Plant Slurry Circulation Pump

This paper focuses on the application of the permanent magnet speed regulation transformation of the desulfurization slurry circulating pump in Guangxi Guoneng Nanning Power Generation Co., Ltd. of the national energy group. Through the comprehensive analysis of three schemes of hydraulic coupling speed regulation, frequency conversion speed regulation and permanent magnet speed regulation, the permanent magnet speed regulation scheme is finally selected. During the transformation, the design, manufacture, transportation, installation and commissioning of the equipment were carried out in detail, and the comprehensive benefit analysis of the transformed system was carried out. The results show that the permanent magnet speed regulation transformation of slurry circulating pump has the characteristics of strong operability, high reliability and remarkable energy saving effect. After the transformation, the system operates stably, the power saving rate reaches 33%, the annual power saving is significant, and the transformation workload of the original system is small, and the later maintenance cost is low. This technology has high popularization value in the industrial field.