山东省国家庄选煤厂安装了一台SPB—750水喷射泵,带负荷试验真空度只有50毫米汞柱。该厂首先改造了闸门和弯头,加大了原水泵的叶轮直径,增加流量,从而使水泵出口压力增大,其次在水箱锥体内加隔板,缓冲了回水,避免了泵的拉空现象,整改了多余弯头及40°的上爬坡,经过这些改造真空度提高到200毫米汞柱,基本上满足了生产上的需要。 State Coal Preparation Plant in Shandong Province installed a SPB-750 water jet pump with a vacuum test load of only 50 mm Hg. The factory first modified the gates and elbows, increased the diameter of the original pump impeller, increase traffic, so that the pump outlet pressure increases, followed by the separator in the tank cone, cushioning the backwater, to avoid the pump emptying Phenomenon, the rectification of the additional elbow and 40 ° of the climb, after these changes to a vacuum degree increased to 200 mm Hg, basically meet the production needs.