苯乙烯装置脱氢尾气系统腐蚀原因分析  

Analysis on Corrosion Causes of Dehydrogenation Tail Gas System in Styrene Plant

作　　者：崔超[1] 米孜拉夫·麦麦提 孙康 王琨[1] CUI Chao;Mizilafu·Maimaiti;SUN Kang;WANG Kun(Dushanzi Petrochemical Company of CNPC,Dushanzi 833600,China)

机构地区：[1]中国石油独山子石化公司乙烯厂,新疆独山子833600

出　　处：《石油化工设备》2022年第3期63-65,70,共4页Petro-Chemical Equipment

摘　　要：介绍了苯乙烯装置脱氢尾气系统工艺流程、管线腐蚀部位及管壁测厚数据,进行了工艺参数对比、设计参数核算分析到取样排查情况的逐步深入探讨,明确苯乙烯装置脱氢尾气系统的腐蚀主要是发生在弯头部位的不均匀腐蚀,这种腐蚀根源于尾气压缩机出口实际运行温度与设计温度偏离,未及时调整引发的流程下游冷却器、热交换器设备的运行状态参数偏离,从而导致的物料弱酸性、物流流速偏大,造成弯管处的腐蚀及冲刷加重。The process flow of dehydrogenation tail gas system of styrene unit,corrosion position of pipeline and thickness measurement data of pipe wall were introduced.The process parameters were compared,design parameters were calculated and analyzed,and the sampling investigation was further discussed.The corrosion of dehydrogenation tail gas system of styrene unit was mainly due to uneven corrosion at elbow.This corrosion is caused by the deviation between the actual operating temperature of the exhaust compressor outlet and the design temperature,and the deviation of the operating state parameters of the coolers and heat exchangers downstream of the process caused by the failure of timely adjustment,which leads to weak acidity of the material and high flow velocity,and aggravates the corrosion and scouring of the bend pipe.

关 键 词：苯乙烯装置:脱氢尾气系统 腐蚀 预防措施 

分 类 号：TQ050.7[化学工程]