基于工艺优化的MDEA装置胺液再生塔底系统腐蚀防控策略  

Corrosion prevention and control strategy for amine regenerator bottom systemin MDEA unit based on process optimization

作　　者：喻灿 关庆林 YU Can;GUAN Qinglin(Shanghai Anchor Technology Co.,Ltd.,Shanghai 200237,China;Sinochem Shandong Changyi Petrochemical Co.,Ltd.,Weifang 261300,China)

机构地区：[1]上海安恪技术股份有限公司,上海200237 [2]中国中化山东昌邑石化有限公司,山东潍坊261300

出　　处：《石油化工腐蚀与防护》2024年第6期41-44,共4页Corrosion & Protection In Petrochemical Industry

摘　　要：胺液再生塔底贫胺液系统一直是胺液再生装置腐蚀的重灾区,包括再生塔重(再)沸器、进料和回流管线、再生塔等。大量案例表明,贫胺液的腐蚀机理包括RNH_(2)-H_(2)S-CO_(2)-Cl--H_(2)O系统腐蚀、胺开裂、汽蚀、冲刷腐蚀,而胺液中腐蚀介质H_(2)S,CO_(2),热稳态盐、氧含量、酸性气负荷、杂质、固体颗粒、流速及操作温度均是影响腐蚀的重要因素。该文结合MDEA装置胺液再生塔底系统工艺分析和国外最新标准,提出了腐蚀防控的工艺优化建议,除加强对贫胺液中腐蚀含量分析,通过在线净化设施、加强过滤管理使分析指标可控,还可以从工艺优化角度如流速、温度、再生量的合理控制来加强再生塔底系统的腐蚀防控。The lean amine system at the bottom of amine regenerator was the hardest hit area for corrosion in amine regeneration unit,including reboiler,feed and return pipelines and regenerator.A large number of cases showed that its corrosion mechanism included RNH_(2)-H_(2)S-CO_(2)-Cl--H_(2)O system corrosion,amine cracking,cavitation and scouring corrosion.The corrosive media in amine solution such as H_(2)S,CO_(2),thermal stable salt,oxygen content,acidic gas load,impurities,solid particles,as well as flow rate and operating temperature were all important factors affecting corrosion.Based on process analysis of the bottom system of amine solution regenerator in MDEA unit and the latest foreign standards,process optimization suggestions for corrosion prevention were put forward.In addition to monitoring the corrosion content in lean amine solution,which can be controlled through online purification facilities and enhanced filtration management,corrosion prevention of regenerator bottom system can also be strengthened from the perspective of process optimization,such as reasonable control of flow rate,temperature and regeneration amount.

关 键 词：胺液再生 贫胺液 工艺优化 再生塔 腐蚀防控 

分 类 号：TE986[石油与天然气工程—石油机械设备]