To counter the problems present in the CO 2 removal with PC method in the little scale ammonia synthesis plant at present, the effect of CO 2 removal plant with carbonic propenyl ester method on the different factors of normal production has been analysed in detail.

Through analyzing and testing the process of carbonizing pump barrel,the relationship between induction hardening parampters,hole size and body hardness was summarized.

This article analyzed reasons for frequent failure of mechanical seal of carbon black water pump,put forward some improving measures to prolong its service life,for instance,improving water flushing process flow of mechanical seal,using helical shaft sleeve,improving material quality of O-type seal ring,as well as determining suitable specific pressure for end faces,etc.