常顶换热器腐蚀问题分析与对策  

Analysis and Countermeasures on Corrosion Problems of Overhead Heat Exchanger

作　　者：杨富淋 李广凯 YANG Fu-lin;LI Guang-kai(Shenyang Zhongke Well Corrosion Control Technology Co.,Ltd.Shenyang 110016,China;Dongying United Petrochemical Co.,Ltd.Dongying 257000,China)

机构地区：[1]沈阳中科韦尔腐蚀控制技术有限公司,辽宁沈阳110016 [2]东营联合石化有限责任公司,山东东营257000

出　　处：《全面腐蚀控制》2023年第9期101-104,共4页Total Corrosion Control

摘　　要：本文通过对某石化企业常减压常顶换热器管束腐蚀泄漏展开调研,分析了泄漏主要原因是HCl-H_(2)S-H_(2)O型露点腐蚀、结盐垢下腐蚀和两相流冲刷综合腐蚀原因导致的管束腐蚀穿孔。采取控制原料油设防值,平稳电脱盐率≤3mg/L,优化腐蚀监测探针并指导缓蚀剂的注入量控制腐蚀速率<0.2mm/a,以及材质升级等措施来解决常顶换热器的腐蚀穿孔问题,确保其安全运行。Based on the investigation of corrosion leakage of atmospheric and vacuum overhead heat exchanger tube bundle in a petrochemical enterprise,this paper analyzes that the leakage is mainly caused by hcl-h_(2)s-h_(2)o dew point corrosion,corrosion under salt scale and two-phase flow erosion.To solve the problem of corrosion perforation of the overhead heat exchanger and ensure its safe operation,measures such as controlling the protective value of feed oil,stabilizing the electric desalting rate≤3mg/L,optimizing the corrosion monitoring probe,guiding the injection amount of corrosion inhibitor,controlling the corrosion rate<0.2mm/a,and upgrading the material were taken.

关 键 词：工艺防腐 换热器 缓蚀剂 在线腐蚀监测 

分 类 号：TE88[石油与天然气工程—油气储运工程]