乙二醇排放闪蒸塔腐蚀泄漏分析

乙烯工业 ›› 2022, Vol. 34 ›› Issue (4): 38-40.

乙二醇排放闪蒸塔腐蚀泄漏分析

董瑞，刘鹏，许阳，杨志娇，苑平平

中国石油天然气股份有限公司辽阳石化分公司，辽宁辽阳 111003

收稿日期:2021-08-19 修回日期:2022-07-10 出版日期:2022-12-25 发布日期:2022-12-30
作者简介:董瑞，男，2008年毕业于西南石油大学材料科学与工程专业，工学学士，主要从事环氧乙烷/乙二醇装置工艺工作，工程师。

Analysis on Corrosion Leakage of Ethylene Glycol Discharge Flash Tower

Dong Rui, Liu Peng, Xu Yang, Yang Zhijiao, Yuan Pingpin

PetroChina Liaoyang Petrochemical Company, Liaoyang, Liaoning, P.C.111003

Received:2021-08-19 Revised:2022-07-10 Online:2022-12-25 Published:2022-12-30

摘要/Abstract

摘要：

碱腐蚀经常发生在蒸发浓缩或高温传热条件下，苛性钠或碱性盐引起的局部腐蚀，特别是温度高于79 ℃的高浓度碱液可引起碳钢的均匀腐蚀，温度达到93 ℃时腐蚀速度非常快。冲刷腐蚀则因流体冲刷，腐蚀产物离开表面，暴露的新鲜金属表面在冲刷和腐蚀的反复作用下发生损伤，易形成蚀坑、凹槽状形貌，具有一定的方向性。针对某石化环氧乙烷/乙二醇装置的乙二醇排放闪蒸塔腐蚀泄漏进行分析，研究腐蚀泄漏产生的原因，并提出整改方案和预防措施，消除泄漏隐患。

关键词: 乙二醇排放闪蒸塔, 碱腐蚀, 冲蚀

Abstract:

Alkaline corrosion often occurs under the conditions of evaporation and concentration or high temperature heat transfer. High concentration alkali solution at a temperature higher than 79 ℃ causes the uniform corrosion of carbon steel, and the corrosion rate is very fast when the temperature reaches 93 ℃. Erosion corrosion is due to fluid erosion. The corrosion products leave the surface, and the exposed fresh metal surface is damaged under the repeated action of erosion and corrosion. It is easy to form pits and grooves, with a certain direction. In this paper, the corrosion leakage of ethylene glycol discharge flash tower in the ethylene oxide/ethylene glycol unit of a petrochemical company is analyzed, the causes of corrosion leakage are studied, and the rectification scheme and preventive measures are put forward to eliminate the potential risk of leakage.

Key words: ethylene glycol discharge flash tower, alkaline corrosion, erosion

董瑞, 刘鹏, 许阳, 杨志娇, 苑平平. 乙二醇排放闪蒸塔腐蚀泄漏分析[J]. 乙烯工业, 2022, 34(4): 38-40.

Dong Rui, Liu Peng, Xu Yang, Yang Zhijiao, Yuan Pingping. Analysis on Corrosion Leakage of Ethylene Glycol Discharge Flash Tower[J]. Ethylene Industry, 2022, 34(4): 38-40.