催化装置分馏塔顶循系统换热器泄漏分析及防腐措施  

Heat Exchanger of Fractionator Overhead Circulation System of Catalytic Unit Leakage Analysis and Anti-corrosion Measures

作　　者：魏兴科 张小刚 WEI Xing-ke;Zhang Xiao-gang(Lanzhou Petrochemical Company,Oil Refining Division Ⅱ,Lanzhou 730060,China)

机构地区：[1]中国石油兰州石化公司炼油运行二部,甘肃兰州730060

出　　处：《兰州石化职业技术学院学报》2022年第3期8-11,共4页Journal of Lanzhou Petrochemical Polytechnic

基　　金：兰州石化职业技术学院科研项目(KJ2018-03)。

摘　　要：针对顶循换热器频繁泄漏问题,通过宏观检查,失效件微观SEM及EDS分析,结合生产工艺介质化学分析确定了腐蚀原因,顶循环系统腐蚀是因壳程介质夹带的水中盐含量高,在壳程管束间易形成垢下腐蚀,大量Cl-及S2-腐蚀性离子加速了管束的腐蚀泄漏。在研究基础上,提出了相应的防护对策。Aiming at the problem of frequent leakage of top circulation heat exchanger,the corrosion reason is determined through macro inspection,micro SEM and EDS analysis of failed parts,combined with the chemical analysis of production process medium.The corrosion of top circulation system is due to the high salt content in the water entrained by shell side medium,which is easy to form scale corrosion between shell side tube bundles,and a large number of Cl-and S2 corrosive ions accelerate the corrosion leakage of tube bundles.This outcome puts forward the corresponding protective countermeasures.

关 键 词：渗铝钢 点蚀坑 EDS分析 

分 类 号：TE986[石油与天然气工程—石油机械设备]