In this paper , the cause of severe wear of a301 mechanical seal at the atmosphere end used in powered separator for polypropylene project was analyzed . then , the reform method to solve the problem was presented 對(duì)聚丙烯裝置動(dòng)力分離器a301機(jī)械密封大氣端嚴(yán)重磨損的原因進(jìn)行了分析,并對(duì)機(jī)封進(jìn)行了改造,使問(wèn)題得到解決。