克劳斯尾气焚烧炉余热锅炉的露点腐蚀及防护措施  

Dew Point Corrosion and Protection Measures of Waste Heat Boiler of Claus Tail Gas Incinerator

作　　者：马金伟[1] 古小红 张延丰[1] 尹崎岭 张杰[2] 卢雪梅[1] MA Jinwei;GU Xiaohong;ZHANG Yanfeng;YIN Qiling;ZHANG Jie;LU Xuemei(Lanpec Technologies Limited,Lanzhou 730070,China;Puguang Company,SINOPEC Zhongyuan Oilfield,Dazhou 635000,China)

机构地区：[1]甘肃蓝科石化高新装备股份有限公司,甘肃兰州730070 [2]中国石化股份有限公司中原油田普光分公司,四川达州635000

出　　处：《石油化工腐蚀与防护》2021年第1期10-13,共4页Corrosion & Protection In Petrochemical Industry

基　　金：国家科技重大专项“尾气余热回收锅炉高效换热结构设计与管接头连接技术研究”(2016ZX05017-006)。

摘　　要：某天然气净化装置尾气焚烧余热锅炉换热管发生腐蚀泄漏。采用外观检查、无损检测、腐蚀产物成分分析和形貌观察等手段对余热锅炉换热管进行检测分析,结果表明,该尾气焚烧余热锅炉换热管的腐蚀失效是硫酸露点腐蚀及硫酸盐共同作用的结果。提出了空气吹扫、干燥氮气保护、修改焚烧炉底部设计和稳定操作等防护措施。Corrosion leakage occurred at the heat exchange pipe in a waste heat boiler of tail gas incineration in a natural gas purification plant.Then the pipes were tested and analyzed by means of appearance inspection,nondestructive testing,corrosion product composition analysis and morphology observation.The results showed that the failure of heat exchange pipes was mainly caused by the dew point corrosion of low temperature sulfuric acid and sulphate.Furthermore,protective measures such as air purge,dry nitrogen protection,modification of incinerator bottom design,and stable operation were put forward.

关 键 词：尾气焚烧余热锅炉 露点腐蚀 停工保护 腐蚀控制 

分 类 号：TE986[石油与天然气工程—石油机械设备]