合成甲醇装置变换炉出口管道开裂失效原因分析  

Cause Analysis of Crack and Failure of Conversion Furnace Outlet Pipeline of Methanol Synthesis Unit

作　　者：鲁世军 卢雪梅 李玉阁[2,3] 李燕姣 宋文明[2,3] 高智德 赵强 LU Shi-jun;LU Xue-mei;LI Yu-ge;LI Yan-jiao;SONG Wen-ming;GAO Zhi-de;ZHAO Qiang(Henan Longyu Coal Chemical Co.Ltd.,Yongchen 476600,China;Machinery Industry Shanghai Lanya Petrochemical Equipment InspectionInstitute Co.Ltd.,Shanghai201518,China;Lanpec Technologies Limited,Lanzhou730070,China)

机构地区：[1]河南龙宇煤化工有限公司,河南永城476600 [2]机械工业上海蓝亚石化设备检测所有限公司,上海201518 [3]甘肃蓝科石化高新装备股份有限公司,甘肃兰州730070

出　　处：《石油化工设备》2021年第1期72-76,共5页Petro-Chemical Equipment

摘　　要：合成甲醇装置变换炉出口管道多处开裂造成泄漏,影响装置正常运行。采用宏观检查、无损检测、化学成分分析、壁垢化学组成分析、金相组织检验、硬度检验以及断口形貌分析等方法对开裂管道进行取样分析,结合工艺装置实际运行情况探讨管道失效原因,认为是工艺波动易形成干-湿交替的管道环境,氯离子在管道湿环境下富集形成酸性介质,敏感材质在酸性介质中受应力作用所致的腐蚀开裂。The outlet pipeline of the conversion furnace of the synthetic methanol plant cracked in many places,caused leakage and affected the normal operation of the unit.The methods of macroscopic inspection,non-destructive testing,chemical composition analysis,wall scale chemical composition analysis,metallographic structure inspection,hardness test and fracture morphology analysis were used to sample and analyze the cracked pipeline.Combined with the actual operation of the process unit,the failure reason of the pipeline was discussed.It was considered that the process fluctuation was prone to form the dry wet alternate pipeline environment,the chloride ion was enriched in the wet environment of the pipeline,and the corrosion and cracking of sensitive materials were caused by stress in acidic media.

关 键 词：变换炉 甲醇变换装置 管道 开裂 失效 分析 

分 类 号：TQ050.7[化学工程]