聚乙烯装置洗涤气密封罐焊缝泄漏原因分析及改进  

Analysis and Improvement of Weld Leakage of Washing Gas Seal Tank in Polyethylene Unit

作　　者：刘永辉[1] 周涛[2] 杨树荣 梁元月[2] Liu Yonghui;Zhou Tao;Yang Shurong;Liang Yuanyue(Sinopec Yangzi Refining&Chemical Company,NanJing 210000,China;Tianhua Institute of Chemical Machinery&Automation Co.,Ltd.,Lanzhou 730060,China;Lanzhou Auxiliary Agent Plant Co.,Ltd.,Lanzhou 730300,China)

机构地区：[1]中国石油化工股份有限公司扬子石化分公司,江苏南京210000 [2]天华化工机械及自动化研究设计院有限公司,甘肃兰州730060 [3]兰州助剂厂股份有限公司,甘肃兰州730300

出　　处：《山东化工》2024年第17期220-222,225,共4页Shandong Chemical Industry

摘　　要：针对扬子石化聚乙烯装置D-2304洗涤气密封罐罐体与下封头焊缝处泄露问题,通过宏观检查、成分分析、金相检验以及硬度试验等方法对洗涤器密封罐失效进行分析,分析焊缝处焊接残余应力过大、腐蚀性离子Cl^(-)导致泄漏的根本原因,对后期容器更新制造及运行过程水含量的检查给出了相关建议。In view of the leakage of the weld between the body and the lower head of the D2304 washing gas seal tank of the polyethylene device of Yang Petrochemical,the failure of the scrubber seal tank was analyzed through macroscopic inspection,composition analysis,metallogram inspection and hardness test,and the root causes of the leakage caused by excessive welding residual stress and corrosive ion Cl^(-)at the weld were respectively analyzed.Some suggestions are given for checking the water content in the process of late container renewal manufacturing and operation.

关 键 词：密封罐 焊缝 失效 

分 类 号：TQ053.2[化学工程]