化工学报2019，Vol.70Issue(3)：1027-1034,8.DOI:10.11949/j.issn.0438-1157.20180785
常顶系统流动腐蚀机理预测及防控措施优化
Mechanism prediction of flow-induced corrosion and optimization of protection measures in overhead system of atmospheric tower
何昌春 1徐磊 1陈伟 1徐晓峰 2欧阳鹏威2
作者信息
- 1. 杭州富如德科技有限公司, 浙江 杭州 310008
- 2. 浙江理工大学机械与自动控制学院, 浙江 杭州 310008
- 折叠
摘要
Abstract
Corrosion failures often occur at the overhead cooling system in the atmospheric tower in a domestic oil refinery. Based on the material balance principle, this study uses the reverse derivation method and process simulation to analyze the flow corrosion failure mechanism of the atmospheric pressure overhead cooling system, including dew point corrosion, ammonium salt crystal deposition scale corrosion, and multiphase flow erosion. Generally, water injection is a convenient and efficient measure to eliminate dew-point corrosion and under-deposit corrosion caused by ammonium salt crystallization. Nevertheless, due to the restricted water injection flow rate and various water injection modes for the heat exchangers, corrosion failure still occurred in the overhead cooling system of the atmospheric tower. By simulating the overhead system, the suitable one of three water injection modes (in the main process pipe, in the heat exchangers and by a programming controller) can be determined to realize the longterm stable operation of the overhead cooling system in the atmospheric tower according to a given injected water flow rate.关键词
腐蚀/结晶/露点/平衡/注水/双罐系统Key words
corrosion/crystallization/dew point/equilibrium/water injection/double-drum system分类
能源科技引用本文复制引用
何昌春,徐磊,陈伟,徐晓峰,欧阳鹏威..常顶系统流动腐蚀机理预测及防控措施优化[J].化工学报,2019,70(3):1027-1034,8.
