脱氨塔底重沸器气相返塔管线泄漏原因及处理  

Leakage Causes and Treatment of Gas Phase Return Tower Pipeline of Reboiler at the Bottom of Deammonia Tower

作　　者：杨阳阳 徐东芳 Yang Yangyang;Xu Dongfang(CNOOC Petrochemical Engineering Limited Company,Qingdao 266100,China)

机构地区：[1]中海油石化工程有限公司,山东青岛266100

出　　处：《山东化工》2024年第1期175-178,共4页Shandong Chemical Industry

摘　　要：针对某炼厂酸性水汽提装置中脱氨塔底重沸器气相返塔管线泄漏问题,采用CAESARⅡ软件进行建模,根据应力计算结果排除管线应力过大造成管线开裂的可能。脱氨塔底净化水中含有微量硫化氢和氨,从Cl离子腐蚀、低温HCl-H2S-H2O电化学腐蚀、氨腐蚀、铵盐腐蚀以及冲刷腐蚀等腐蚀因素进行分析,最终得出冲刷腐蚀是造成脱氨塔底重沸器气相返塔管线腐蚀泄露的主要原因,并从短期和长期处理角度提出整改建议,为类似装置的生产运行及预防提供了理论参考。In order to solve the pipeline leakage problem of the bottom reboiler gas phase return tower in the acid water vapor extraction unit of a refinery,CAESAR II software was used to model the pipeline,and the possibility of pipeline cracking caused by excessive pipeline stress was excluded according to the stress calculation results.The purification water at the bottom of the deamination tower contains trace amounts of hydrogen sulfide and ammonia.Corrosion factors such as Cl ion corrosion,low temperature HCl-H 2S-H 2O electrochemical corrosion,ammonia corrosion,ammonium salt corrosion and erosion corrosion are analyzed,and it is finally concluded that erosion corrosion is the main cause of corrosion leakage of the gas phase return tower pipeline of the reboiler at the bottom of the deamination tower.Some suggestions are put forward from the perspective of short-term and long-term treatment,which provides a theoretical reference for the production operation and prevention of similar devices.

关 键 词：脱氨塔底重沸器 冲刷腐蚀 CAESARⅡ 应力计算 

分 类 号：TE624[石油与天然气工程—油气加工工程]