常压塔顶系统腐蚀原因分析及防腐措施研究  

Cause analysis and solutions of corrosion in atmospheric tower overhead system

作　　者：尹志刚[1] 韩磊 Yin Zhigang;Han Lei(SINEPEC Beijing Yanshan Branch,Beijing 102500;SINEPEC Qingdao Research Institute of Safety Engineering,Qingdao 266000)

机构地区：[1]中国石油化工股份有限公司北京燕山分公司,北京102500 [2]中国石油化工股份有限公司青岛安全工程研究院,山东青岛266000

出　　处：《石化技术》2021年第11期31-33,共3页Petrochemical Industry Technology

摘　　要：某千万吨级常减压装置常压塔顶挥发线并列两台塔顶油气/原油换热器中的一台出口管线腐蚀减薄严重。本文采用工艺和CFD仿真相结合的方法对该常压塔顶管线的多相流腐蚀问题进行了研究,分析了两台换热器及其前后管线主要的腐蚀机理、腐蚀风险部位及其程度,得出注水不足、偏流等导致腐蚀的关键因素,并采取了针对性的改进措施,有效解决了常顶系统的腐蚀问题,确保了装置安全长周期运行。Severe thinning occurred in the outlet of one series of oil gas/crude heat exchanger on the overhead of the atmospheric tower at a 10 mt/a atmospheric-vacuum distillation unit,which threatened the safe operation of the unit.This paper investigates the multi-phase flow corrosion in the pipelines of the atmospheric tower with the help of process simulation and CFD simulation.The main corrosion mechanism,potential corrosion risks and degrees were described to provide insight into the causes of insufficient water feeding and bias flow.Solutions were offered to resolve the corrosion in overhead system for the long-term operation of the plant in stable.

关 键 词：常压塔 塔顶系统 腐蚀 工艺仿真 流场仿真 

分 类 号：TE986[石油与天然气工程—石油机械设备]