石油与天然气化工2024，Vol.53Issue(3)：8-13,6.DOI:10.3969/j.issn.1007-3426.2024.03.002
尾气处理装置烟气加热器腐蚀失效原因分析
Cause analysis of corrosion failure in flue gas heater of tail gas treatment unit
摘要
Abstract
Objective The aim is to analyze the causes of serious corrosion failure of flue gas heater in Cansolv tail gas treatment unit of a natural gas purification plant.Methods The corrosion environment of the flue gas heater tube bundle was analyzed,and the failure reasons,such as the physical and chemical properties of the material,the composition of the corrosion products and the micro-morphology were analyzed.Results The physical and chemical properties of the failed tube bundle met the requirements.The leakage area of the tube bundle was pit-shaped and honeycomb-shaped,and some groove tips had cracks that penetrate deep into the substrate,exhibiting stress corrosion characteristics.Conclusions The electrochemical corrosion and stress corrosion occurred in the flue gas heater under high temperature and high acid content,resulting in corrosion leakage of the tube bundle.关键词
Cansolv/尾气处理/腐蚀/烟气加热器/不锈钢/S31254Key words
Cansolv/tail gas treatment/corrosion/flue gas heater/stainless steel/S31254引用本文复制引用
黄刚华,陈世明,江晶晶,杨爽,彭银华,蒋军锋..尾气处理装置烟气加热器腐蚀失效原因分析[J].石油与天然气化工,2024,53(3):8-13,6.基金项目
中国石油集团公司重大科技专项课题"CCUS注采工艺、产出气循环利用及高效防腐关键技术研究"(2021ZZ01-04) （2021ZZ01-04）
