当前位置：首页 > 过刊浏览->2026年第37卷第2期
乙烯装置液相裂解炉对流段管道泄漏分析
Analysis of Pipeline Leakage in the Convection Section of Ethylene Plant's Liquid Phase Cracking Furnace
浏览(71) 下载(5)
- DOI:
- 作者:
- 于大奇1 ，王 成2
Yu Daqi 1 , Wang Cheng 2
- 作者单位:
- 盛虹炼化（连云港）有限公司；2. 陕西榆能能化新材料有限公司
Shenghong Refining & Chemical (Lianyungang) Co., Ltd.; 2. SHANXI YUNENG energy & chemical new material Co.，Ltd.
- 关键词:
- 乙烯装置；裂解炉；对流段；腐蚀泄漏；电偶腐蚀；异种钢焊接；石脑油
ethylene plant; cracking furnace; convective segment; corrosion leakage; galvanic corrosion; welding of dissimilar steels; naphtha
- 摘要:
- 文中针对某乙烯装置液相裂解炉对流段原料预热出口管线在运行过程中频繁发生的腐蚀泄漏问题，结合多源现场数据、材质分析、腐蚀产物检测及电化学机理分析，系统阐述了腐蚀发生的根本原因。研究表明，腐蚀主要发生在碳钢与不锈钢（304H）异种钢焊接焊缝处的碳钢侧，其主导机制为电偶腐蚀，并辅以酸性凝结水、管道内硫化物及低温运行环境的共同作用。腐蚀产物以Fe₂O₃、Fe₃O₄和FeS₂为主，证实了硫化物参与的电化学过程。通过提高排烟温度、改进连接结构、优化原料配比等综合措施，可有效控制腐蚀的发生，为乙烯装置裂解炉的安全稳定运行提供了理论依据和解决方案。This article focuses on the frequent corrosion and leakage problems of the preheating outlet pipeline of the convectionsection of a liquid phase cracking furnace in an ethylene plant during operation. Combining multiple sources of on-site data,material analysis, corrosion product detection, and electrochemical mechanism analysis, the fundamental causes of corrosion aresystematically explained. Research has shown that corrosion mainly occurs on the carbon steel side of the weld seam between carbonsteel and stainless steel (304H) dissimilar steel, and its dominant mechanism is galvanic corrosion, supplemented by the combinedeffects of acidic condensed water, sulfides in the pipeline, and low-temperature operating environment. The corrosion products aremainly Fe2O3,Fe3O4,andFeS2,confirming the electrochemical process involving sulfides. By taking comprehensive measures such asincreasing the exhaust temperature, improving the connection structure, and optimizing the raw material ratio, the occurrence ofcorrosion can be effectively controlled. This study provides theoretical basis and engineering solutions for the safe and stableoperation of ethylene cracking furnaces.