还原尾气环管内管开裂原因探讨及预防建议  

Discussion on Inner Tube Crack and Precaution Suggestions of Reduction Exhaust Gas Ring Pipe

作　　者：薛安雪[1] 汪剑[1] 唐振华 卢亚伟 王志荣 陈文涛[3,4] XUE An-xue;WANG Jian;TANG Zhen-hua;LU Ya-wei;WANG Zhi-rong;CHEN Wen-tao(Xuzhou Branch,Special Equipment Safety Supervision Inspection Institute of Jiangsu Province,Xuzhou 221000,China;School of Safety Science and Engineering,Nanjing Tech University,Nanjing 211816,China;China Emergency Management Research Center,Wuhan University of Technology,Wuhan 430070,China;China Occupational Safety and Health Association,Beijing 100011,China)

机构地区：[1]江苏省特种设备安全监督检验研究院徐州分院,江苏徐州221000 [2]南京工业大学安全科学与工程学院,江苏南京211816 [3]武汉理工大学中国应急管理研究中心,湖北武汉430070 [4]中国职业安全健康协会,北京100011

出　　处：《石油化工设备》2020年第5期62-68,共7页Petro-Chemical Equipment

基　　金：国家自然科学基金:结构尺寸对连通装置甲烷-空气混合物燃爆特性的影响(51376088)。

摘　　要：不锈钢是工业领域普遍使用的耐腐蚀金属材料。在工业实践中,某些工况下不锈钢也会发生腐蚀和开裂。以某半导体多晶硅还原尾气环管内管开裂事故管道为例,进行了尾气环管内管的化学成分分析、硬度分析、金相组织分析、电镜扫描分析以及能谱分析。结合尾气环管内管实际工作的温度、压力,管道内部流体介质的特性,讨论了导致尾气环管内管开裂的原因,认为还原尾气环管内管主要发生了氯离子浓度超标导致的点蚀以及应力腐蚀开裂,提出了针对性预防措施。Stainless steel is a corrosion-resistant metal material commonly used in the industrial field.Industrial companies have found in practice that stainless steel will also corrode and crack under certain conditions.Taking a semiconductor polysilicon reduction exhaust gas pipe cracking accident pipeline as an example,the chemical composition analysis,hardness analysis,metallographic structure analysis,electron microscope scanning analysis and energy spectrum analysis of the exhaust gas pipe were carried out.Combined with the actual temperature and pressure of the exhaust gas pipe,the characteristics of the fluid medium inside the pipeline and the causes of the cracking of the exhaust gas ring were discussed.It is considered that the reduction exhaust gas ring pipe mainly suffered from pitting corrosion and stress corrosion cracking caused by excessive chloride ion concentration,and targeted preventive measures were proposed.

关 键 词：不锈钢 还原尾气处理 环管 内管 开裂原因 预防建议 

分 类 号：TQ050.7[化学工程]