辽宁石油化工大学学报

辽宁石油化工大学学报 ›› 2022, Vol. 42 ›› Issue (5): 80-83.DOI: 10.3969/j.issn.1672-6952.2022.05.012

• 机械工程 • 上一篇    下一篇

石化火炬燃烧器管线裂纹开裂失效分析

赵志伟1(), 姜文全1(), 郭俊峰2, 安延海2, 李志2, 张瑶2   

  1. 1.辽宁石油化工大学 机械工程学院,辽宁 抚顺 113001
    2.中国石油天然气股份有限公司 辽河石化分公司,辽宁 盘锦 124022
  • 收稿日期:2021-11-16 修回日期:2022-01-16 出版日期:2022-10-25 发布日期:2022-11-18
  • 通讯作者: 姜文全
  • 作者简介:赵志伟(2001⁃),男,本科生,过程装备与控制工程专业,从事管线腐蚀防护技术方面的研究;E⁃mail:626124279@qq.com
  • 基金资助:
    辽宁省自然科学基金项目(20170540587);辽宁省教育厅科学研究经费项目(L2019024);辽宁省大学生创新创业训练项目(2021101480049)

Crack Failure Analysis of Torch Burner Pipeline in Petrochemical

Zhiwei Zhao1(), Wenquan Jiang1(), Junfeng Guo2, Yanhai An2, Zhi Li2, Yao Zhang2   

  1. 1.School of Mechanical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China
    2.Liaohe Petrochemical Company,China Petroleum and Natural Gas Co. ,Ltd. ,Panjin Liaoning 124022,China
  • Received:2021-11-16 Revised:2022-01-16 Published:2022-10-25 Online:2022-11-18
  • Contact: Wenquan Jiang

摘要:

研究了火炬燃烧器管线开裂区域的破坏机理,通过对管线进行低倍宏观分析、材质分析、显微镜金相分析、扫描电子显微镜(SEM)微观形貌及能谱分析(EDS)与实验相结合的手段,找出了管线失效开裂的原因,进一步分析了敏感环境(介质)、敏感材料和应力状况对管线开裂失效造成的影响。结果表明,在一定的温度下,管线内形成H2S+CO2+H2O的酸性腐蚀环境,火炬燃烧器管线的不锈钢材质敏化严重,存在严重的晶间腐蚀;晶间腐蚀造成管壁表面晶粒剥落,产生点蚀坑,点蚀坑处又成为应力腐蚀裂纹的裂纹源;火炬燃烧器管线在制造加工、装置运行等过程中会产生一定程度的应力集中,在腐蚀介质、敏感材质和应力集中三个因素的影响下,火炬燃烧器管线会发生晶间型应力腐蚀开裂而失效。

关键词: 应力腐蚀, 管线开裂, H2S, 应力集中

Abstract:

The failure mechanism of pipeline cracking area of ground flare burner was studied. Through the combination of low?power macro analysis, material analysis, microscopic metallographic analysis, scanning electron microscope (SEM) micro morphology and energy spectrum analysis (EDS) and experiment, the causes of pipeline failure and cracking were found out. The sensitive environment (medium), the influence of sensitive materials and stress conditions on pipeline cracking failure were further analyzed. The results show that at a certain temperature, an acidic corrosion environment of H2S+CO2+H2O is formed in the pipeline, and the stainless steel material of the flare burner pipeline is seriously sensitized and has serious intergranular corrosion; Intergranular corrosion causes grain spalling on the surface of pipe wall, resulting in pitting pits, which become the crack source of stress corrosion cracks; The flare burner pipeline will produce a certain degree of stress concentration in the process of manufacturing, processing and device operation. Under the condition of corrosive medium, sensitive material and stress concentration, the flare burner pipeline will fail due to intergranular stress corrosion cracking.

Key words: Stress corrosion, Pipeline cracking, H2S, Stress concentration

中图分类号: 

引用本文

赵志伟, 姜文全, 郭俊峰, 安延海, 李志, 张瑶. 石化火炬燃烧器管线裂纹开裂失效分析[J]. 辽宁石油化工大学学报, 2022, 42(5): 80-83.

Zhiwei Zhao, Wenquan Jiang, Junfeng Guo, Yanhai An, Zhi Li, Yao Zhang. Crack Failure Analysis of Torch Burner Pipeline in Petrochemical[J]. Journal of Liaoning Petrochemical University, 2022, 42(5): 80-83.

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链接本文: http://journal.lnpu.edu.cn/CN/10.3969/j.issn.1672-6952.2022.05.012

               http://journal.lnpu.edu.cn/CN/Y2022/V42/I5/80