我厂是年产焦炭１００万t、轻苯１．５万t和焦油４．５万t的大型煤化工企业，化产系统共有２００多台泵，有离心泵、旋涡泵、蒸汽泵、柱塞泵、液下泵、多级泵和真空泵等１０大系列５０多个品种，但都不同程度地存在泄漏问题。为解决上述问题，我们在１９９５年进行新粗苯工段设 Our factory is an annual output of 1 million tons of coke, light benzene 15,000 t and tar 45,000 t large coal chemical industry, a total of more than 200 production systems pump, a centrifugal pump, vortex pump, steam pump, column Plug pump, submerged pump, multi-stage pump and vacuum pump 10 series over 50 varieties, but to varying degrees, there is the problem of leakage. In order to solve the above problems, we set up a new crude benzene plant in 1995