催化裂化装置解吸塔再沸器腐蚀内漏排查与对策  

Investigation and countermeasures for corrosion and internal leakage of desorption tower reboiler in catalytic cracking unit

作　　者：董勇勇 白天相 杨富淋 Dong Yongyong;Bai Tianxiang;Yang Fulin(Zhenghe Group Co.,Ltd.,Guangrao 257300,China;PetroChina Daqing Petrochemical Company,Daqing 163000,China;Shenyang Zhongkeweier Corrosion Control Technology Co.,Ltd.,Shenyang 110016,China)

机构地区：[1]正和集团股份有限公司,山东广饶257300 [2]中国石油天然气股份有限公司大庆石化分公司,黑龙江大庆163000 [3]沈阳中科韦尔腐蚀控制技术有限公司,辽宁沈阳110016

出　　处：《石油化工腐蚀与防护》2025年第2期44-47,共4页Corrosion & Protection In Petrochemical Industry

摘　　要：催化裂化装置吸收稳定系统解吸塔塔底再沸器气相返塔温度出现异常,气相返塔温度持续降低,最低温度为95.7℃。对解吸塔塔底再沸器工艺进行分析,确定了换热器管束及筒体为腐蚀风险区域;使用脉冲涡流技术对筒体风险区域进行扫查,使用远场涡流对管束进行检测,确定了相应的减薄位置。提出了适当提高塔底温度、降低再沸器底部水含量、对管束和壳体进行材质升级等防护措施。The gas phase reflux temperature of the bottom reboiler of the desorption tower in the absorption and stabilization system of the catalytic cracking unit was abnormal,and it continued to decrease,reaching a minimum temperature of 95.7℃.An analysis was conducted on the process of the bottom reboiler of the desorption tower,and the heat exchanger tube bundle and cylinder were identified as the corrosion risk areas.Pulsed eddy current technology was used to scan the risk areas of the cylinder,and far-field eddy current was used to detect the tube bundle,and then the corresponding thinning positions were determined.Protective measures were proposed such as appropriately increasing the bottom temperature of the tower,reducing the water content at the bottom of the reboiler,and upgrading the material of the tube bundle and shell.

关 键 词：腐蚀隐患排查 内漏检测 远场涡流 催化裂化装置 再沸器 

分 类 号：TE986[石油与天然气工程—石油机械设备]