常减压装置空冷器低温腐蚀问题的探讨

Exploration of Air Cooler Low-Temperature Corrosion of Atmospheric and Vacuum Distillation Unit

文章结合某厂500万吨/年常减压蒸馏装置的空冷器腐蚀泄漏问题,对原油性质、空冷器腐蚀点前后工艺参数进行分析,探究装置中频繁出现的空冷器低温腐蚀泄漏问题的原因,提出了一些防腐措施与建议。结果表明:平稳"一脱两注"操作、提高常压塔顶换热器冷凝负荷、升级空冷器材质及加强腐蚀监测可以缓解常减压装置空冷器低温腐蚀问题。

The paper combining with air cooler corrosion and leakage of a facroty 5 Mt/a atmospheric and vacuum distillation unit, analyzed the crude oil properties and the anteroposterior technical parameters of air cooler corrosion area, explored the reason of the frequent problems of air cooler corrosion and leakage, and put forward some suggestions on anti-corrosion. The results showed that stabilize the ＂one removal and two injections＂, increasing the heat exchange load of tower top heat exchanger, upgrade the material of air cooler and strengthen monitoring of corrosion can mitigate the low-temperature corrosion of air cooler of atmospheric and vacuum distillation unit.