POSM装置洗涤塔塔盘腐蚀失效分析及维护建议  

Corrosion Failure Analysis and Maintenance Suggestions for the Tray of Scrubber of POSM Device

作　　者：宋耀民 邱志军 李海涛 李舒君 Song Yaomin;Qiu Zhijun;Li Haitao;Li Shujun(China Special Equipment Inspection And Research Institute Technology Innovation Center of Risk Prevention and Control of Refining and Chemical Equipment for State Market Regulation,Beijing 100029,China;Sinochem Quanzhou Petrochemical Co.,Ltd.,Quanzhou,Fujian 362103,China)

机构地区：[1]中国特种设备检测研究院国家市场监管技术创新中心(炼油与化工装备风险防控),北京100029 [2]中化泉州石化有限公司,褔建泉州362103

出　　处：《化工设备与管道》2024年第6期28-33,共6页Process Equipment & Piping

基　　金：国家重点研发计划课题《超设计使用年限服役承压设备安全风险综合评价及智能预警技术》(2021YFC3001805);中国特检院二级学科团队“成套装置风险智能防控”(2021XKTD002)。

摘　　要：某石化POSM装置洗涤塔塔盘在服役过程中发生腐蚀失效,以腐蚀塔盘为对象进行失效分析,分别进行了宏观检查、化学成分分析、金相分析、扫描电镜及能谱分析、物相分析。结果表明:洗涤塔塔顶气相夹带的对甲苯磺酸含有游离的硫酸,遇水溶解后在一定温度下浓缩成高浓度的硫酸溶液,进而对塔盘产生了腐蚀。另外,结合塔盘的服役情况,推断了在目前的操作工况下硫酸对塔盘材料S22053的腐蚀速率。最后,根据分析结果给出了洗涤塔的运行维护建议。The corrosion failure of the scrubber tray of a petrochemical POSM device occurred during its service.The failure analysis was carried out with the corrosion tray as the object.The macroscopic inspection,chemical composition analysis,metallographic analysis,scanning electron microscopy and energy spectrum analysis,phase analysis were carried out respectively.The results show that the p-toluene sulfonic acid entrained in the gas phase at the top of the scrubber contains free sulfuric acid,which were dissolved in water and concentrated into a high concentration of sulfuric acid solution at a certain temperature,thus caused corrosion to the tray.In addition,based on the service condition of the tray,the corrosion rate of sulfuric acid to the tray material S22053 under the current operating conditions was deduced.Finally,according to the analysis results,the operation and maintenance suggestions of the scrubber were given.

关 键 词：POSM装置 塔盘 腐蚀 失效分析 硫酸 

分 类 号：TH49[机械工程—机械制造及自动化] TQ053.5[化学工程] TQ050.9