高压洗涤器换热管失效原因分析与运行建议  

Failure Analysis and Operation Suggestion for Heat Exchange Tube of High Pressure Scrubber

作　　者：曹金鑫 王维夫[2] 朱爱娟 CAO Jinxin;WANG Weifu;ZHU Aijuan(Sinochem Lantian Co.,Ltd.,Hangzhou 310000,China;Zhejiang University of Technology,Hangzhou 310000,China;Sinopec Shanghai Petrochemical Co.,Ltd.,Shanghai 200540)

机构地区：[1]中化蓝天集团有限公司,浙江杭州310000 [2]浙江工业大学,浙江杭州310000 [3]中国石化上海石油化工股份有限公司,上海200540

出　　处：《石油化工腐蚀与防护》2021年第2期61-64,共4页Corrosion & Protection In Petrochemical Industry

摘　　要：为了查找高压洗涤器换热管出现微裂纹并发生泄漏的原因,分析了高压洗涤器换热管检修数据、高压调温水运行数据和换热管失效部位,通过计算机辅助模拟换热管失效过程,发现:奥氏体不锈钢换热管泄漏是由氯离子应力腐蚀造成的。提出了运行建议措施:对壳程介质成分要精确控制,控制氯离子质量浓度小于5 mg/L,在高压调温水入口处增加防冲挡板。Crack leakage in heat exchange tube of high pressure scrubber was analyzed by means of maintenance data,operation data and sample microanalysis.Through computer-aided simulation,it was found that the leakage was caused by chloride stress corrosion of austenitic stainless steel.It was recommended that the composition of shell side medium shall be controlled accurately,and mass concentration of chloride ion shall be restricted less than 5 mg/L.

关 键 词：高压洗涤器 换热管 泄漏 应力腐蚀 建议 

分 类 号：TQ441.41[化学工程—化学肥料工业]