辽宁石油化工大学学报

辽宁石油化工大学学报

• 机械工程 • 上一篇    下一篇

减黏裂化换热管束腐蚀泄漏机理与防护研究

闫腾飞1姜昊君1姜文全1李强2岳云雪2余睿哲3   

  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; 3.抚顺石化公司 石油三厂,辽宁 抚顺 113001)
  • 收稿日期:2019-02-26 修回日期:2019-04-02 出版日期:2019-10-31 发布日期:2019-10-30
  • 通讯作者: 姜文全(1979⁃),男,博士,副教授,从事压力容器及压力管道安全设计方面的研究;E⁃mail:j_wenquan@126.com
  • 作者简介:闫腾飞(1996-),男,本科生,过程装备与控制工程专业,从事化工容器安全技术研究;E-mail:904181752@qq.com
  • 基金资助:
    辽宁省自然科学基金项目(20170540587);辽宁省大学生创新创业训练计划项目(201810148038)

The Corrosion Mechanism and Protection Technology of the Heat Exchanger Bundle in Visbreaking Unit

Yan Tengfei1Jiang Haojun1Jiang Wenquan1Li Qiang2Yue Yunxue2Yu Ruizhe3   

  1. (1.School of Mechanical Engineering,Liaoning Shihua University,Fushun Liaoning 113001,China; 2.Liaohe Petrochemical Company,China Petroleum and Natural Gas Co. Ltd., Panjin Liaoning 124022,China; 3.No.3 Oil Plant,Fushun Petrochemical Company,Fushun Liaoning 113001,China)
  • Received:2019-02-26 Revised:2019-04-02 Online:2019-10-31 Published:2019-10-30

摘要: 研究了减黏裂化装置换热器腐蚀破坏机理,通过现场形貌观察、扫描电子显微镜(SEM)微观形貌、能谱分析(EDS)及腐蚀挂片实验相结合的手段,找出了换热器内部换热管、折流板的环烷酸腐蚀破坏原因,进一步分析了环烷酸对碳钢的腐蚀原因;继而通过多种材料腐蚀挂片实验比对,提出了防腐措施。结果表明,减黏裂化装置换热器的腐蚀泄漏与原油的含水量、高酸值、换热器的工作温度及材质有关,对原油进行脱水处理、合理地改变换热器的工作温度和材质,能够有效地减少减黏裂化装置换热器的腐蚀破坏。

关键词: 减黏裂化装置, 换热器, 腐蚀, 环烷酸, 腐蚀挂片

Abstract: The corrosion damage mechanism of heat exchanger in visbreaking unit was studied, through field morphology observation, scanning electron microscopy (SEM) micromorphology, energy spectrum analysis (EDS) and corrosion coupon experiments, and find out the naphthenic acid corrosion damage reason of the exchange tube heat exchanger and baffle plate, further analyzes the naphthenic acid corrosion mechanism of carbon steel; Then through a variety of material corrosion coupon experimental comparison, the anti⁃corrosion measures are put forward. The research results show that the corrosion of heat exchanger leakage and crude oil viscosity device, high acid value, the water content of the working temperature of heat exchanger and the material, dehydration of crude oil and reasonable change of the working temperature and material of the heat exchanger can effectively reduce the corrosion damage of the heat exchanger of the viscosity reducing device.

Key words: Visbreaking unit, Heat exchanger, Corrosion, Naphthenic acid, Corrosion bolt