炼油技术与工程 ›› 2025, Vol. 55 ›› Issue (4): 55-59.

• 安全卫生 • 上一篇    下一篇

在线除盐防腐技术连续重整装置应用总结

于希水¹，张毅文²，韩振强¹，郝先荣¹，王莜菁¹，张乐乐³，刘硕³，卢浩³   

  1. ¹. 中国石油天然气股份有限公司长庆石化分公司，陕西省咸阳市 712000；². 上海米素环保科技有限公司，上海市 201101；³. 华东理工大学机械与动力工程学院，上海市 200237

  • 收稿日期:2024-12-20 出版日期:2025-04-15 发布日期:2025-04-21
  • 作者简介:于希水，高级工程师，1998年毕业于辽宁石油化工大学化工工艺专业，主要从事石油化工管理工作。联系电话：17604065366，E-mail：yuxishui@petrochina.com.cn。
  • 基金资助:
    国家自然科学基金（52370077）；上海市科技计划（22QA1402600）

Application summary of online desalination and anti-corrosion technology for continuous reforming unit

Yu Xishui¹, Zhang Yiwen², Han Zhenqiang¹, Hao Xianrong¹, Wang Youjing¹, Zhang Lele³, Liu Shuo³, Lu Hao³   

  1. ¹. PetroChina Changqing Petrochemical Company, Xi'an, Shaanxi 712000; ². Shanghai Misu Technology Co., Ltd., Shanghai 201101; ³. School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237

  • Received:2024-12-20 Online:2025-04-15 Published:2025-04-21

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摘要：

针对连续重整装置脱戊烷塔塔顶循环（顶循）系统的结盐腐蚀问题，对腐蚀原因进行了分析。采用在线除盐防腐技术，开发了“湍流分散-顺流洗涤-油水深度分离”除盐装置。工业运行结果表明：采用该在线除盐装置后，出口循环油的平均氯质量分数为0.116 μg/g，平均硫质量分数为0.137 μg/g，脱氯、脱硫效果明显；除盐装置出口循环油的平均水质量分数为7.450 μg/g，出口除盐水的平均油质量浓度为2.398 mg/L，实现了油水的深度分离，降低了顶循系统的水含量；空冷器出口腐蚀速率维持在极低水平，为0.08624 mm/a，可有效缓解脱戊烷塔塔顶设备的结盐腐蚀问题，对脱戊烷塔的安全、经济运行起重要作用。

关键词: 在线除盐, 连续重整装置, 脱戊烷塔, 结盐腐蚀, 脱氯, 脱硫, 腐蚀介质, 腐蚀速率

Abstract:

To solve the problem of salt deposition and corrosion in the overhead circulating system of the de-pentanizer column in a continuous catalytic reforming unit, the causes of corrosion were analyzed. An online desalination and anti-corrosion technology was adopted, and a desalination equipment coupled with “turbulent dispersion-downstream washing-deep oil-water separation” was developed. Industrial operation results of the online desalination equipment showed that the average chlorine mass fraction in the outlet circulating oil was 0.116 μg/g, the average sulfur mass fraction was 0.137 μg/g, and the dechlorination and desulfurization effects were significant; the average water mass fraction in the outlet circulating oil was 7.450 μg/g, and the average oil mass concentration of the outlet desalinated water was 2.398 mg/L, achieving deep separation of oil and water and reducing the water content of the overhead circulating system; the corrosion rate at the outlet of the air cooler was maintained at an extremely low level of 0.08624 mm/a, effectively alleviating the salt deposition and corrosion of the equipment. This technology plays a significant role in the safe and economic operation of the de-pentanizer column.

Key words: online desalination, continuous reforming unit, de-pentanizer column, salt deposition and corrosion, dechlorination, desulfurization, corrosive medium, corrosion rate