300MW供热机组水环式真空泵系统技术改造

Technical Reconstruction of the Water-ring Vacuum Pump System in 300 MW Thermal Power Generating Unit

针对300 MW供热机组水环式真空泵使用寿命过短的问题,在介绍水环式真空泵的工作原理的基础上,结合现场试验分析了叶轮发生汽蚀损坏的过程,给出了真空泵冷却器冷却水和真空泵工作液2种改造方式,并在分析实施效果的基础上讨论了其他改造方法。

Based on the detailed introduction of the working principle,the whole process of the cavitation erosion which is the main reason for the decrease of the service life of the water-ring vacuum pump system is analyzed in the paper.Two kinds of reconstruction schemes for the cooling water in the coolers and the working fluid in the vacuum pump are proposed,and the methods abandoned in the paper are also discussed to make a comparison.