某煤化工厂蒸汽换热器管束的泄漏原因  

Leakage Causes of Steam Heat Exchanger Tube Bundle in a Coal Chemical Plant

作　　者：李晓威 杜晨阳[1,2] 刘文 于明亮[1,2] LI Xiaowei;DU Chenyang;LIU Wen;YU Mingliang(China Special Equipment Inspection and Research Institute,Beijing 100029,China;Technology Innovation Center of Risk Prevention and Control of Refining and Chemical Equipment for State Market Regulation,Beijing 100029,China)

机构地区：[1]中国特种设备检测研究院,北京100029 [2]国家市场监管技术创新中心(炼油与化工装备风险防控),北京100029

出　　处：《腐蚀与防护》2022年第11期110-113,118,共5页Corrosion & Protection

摘　　要：某煤化工企业空分装置的一蒸汽换热器管束发生了泄漏失效。为防止此类事故再次发生,对失效管束进行了宏微观形貌观察、扫描电镜分析及能谱分析,结合化工工艺分析确定其失效原因。结果表明,该换热器管束泄漏失效是由于碱腐蚀作用引起的点蚀穿孔。最后,针对换热管的是失效原因给出了合理的改进建议。A leakage failure happened in the steam heat exchanger tube bundle in an air separation unit of a coal chemical plant.In order to prevent such accident,observation of macro and micro morphology,analysis by scanning electron microscopy and energy dispersive spectroscopy combined with chemical process analysis were conducted to find out the failure causes.The results show that the leakage failure of the steam heat exchanger tube bundle was due to pitting perforation caused by alkali corrosion.The reasonable improvement suggestions were given according to the failure reasons of the heat exchanger tubes.

关 键 词：管束 点蚀坑 环形槽 碱腐蚀 

分 类 号：TG172[金属学及工艺—金属表面处理]