合成氨单元开工加热炉炉管开裂失效分析  

Failure analysis of furnace tube cracking in synthetic ammonia unit

作　　者：季斐 王海[1] 朱继红 杜延年 杨琰嘉 包振宇 JI Fei;WANG Hai;ZHU Jihong;DU Yannian;YANG Yanjia;BAO Zhenyu(SINOPEC Anqing Petrochemical Company,Anqing 246000,China;SINOPEC Engineering Group Luoyang R&D Center of Technology,Luoyang 471003,China)

机构地区：[1]中国石油化工股份有限公司安庆分公司,安徽安庆246000 [2]中石化炼化工程集团洛阳技术研发中心,河南洛阳471003

出　　处：《石油化工腐蚀与防护》2024年第1期45-49,共5页Corrosion & Protection In Petrochemical Industry

基　　金：中国石化科技开发项目“典型煤气化及净化装置腐蚀控制体系建设与应用”(CHG22137)。

摘　　要：为了查明合成氨单元开工加热炉炉管发生开裂失效的原因,采用多种检测方法对失效炉管进行了分析。根据裂纹形貌分析、材质化学成分分析、金相组织分析和裂纹填充物能谱分析等结果可以得出,失效炉管两处开裂的原因分别是湿硫化氢破坏和异种金属混入,炉管上部外壁的密集蚀坑则是由烟气硫酸露点腐蚀所致,基于炉管失效原因分析,提出了针对性的预防措施。In order to identify the cracking causes of furnace tube in synthetic ammonia unit,multiple detection methods were applied to study the failed furnace tube.Based on the findings from crack morphology analysis,material chemical composition analysis,metallographic structure analysis and crack filler energy spectrum analysis,it can be concluded that the wet hydrogen sulfide damage and mixing of different metals were the root causes for two cracks in furnace tube.The dense corrosion pits on outer wall at upper part of the furnace tube were caused by dew point corrosion of flue gas sulfuric acid.Concrete measures were put forward accordingly.

关 键 词：合成氨单元 开工加热炉 炉管 开裂 失效 湿硫化氢破坏 硫酸露点腐蚀 

分 类 号：TQ113.251.5[化学工程—无机化工]