贫/富甲醇换热器壳程通道堵塞的原因及处理  

THE CAUSE OF SHELL SIDE BLOCK IN LEAN/RICH METHANOL EXCHANGER

作　　者：尤军帅 You Junshuai(SINOPEC Great Wall Energy and Chemical(Guizhou)Co.,Ltd.,Guiyang 550081)

机构地区：[1]中国石化长城能源化工(贵州)有限公司,贵州贵阳550081

出　　处：《大氮肥》2024年第3期157-160,共4页Large Scale Nitrogenous Fertilizer Industry

摘　　要：某公司低温甲醇洗装置在生产运行期间,出现贫/富甲醇换热器壳程富硫甲醇循环量下降、管程贫硫甲醇温度升高、再吸收塔下塔积液、热再生塔液位偏低和尾气中携带甲醇等异常工况,伴随工况恶化,净化气中二氧化碳含量和硫化物含量经常超标。为此,制定并实施了一系列在线维护方案。装置开车后富硫甲醇循环量恢复正常,装置负荷由停车前的65.0%提升至76.5%。During the operation of a low temperature methanol washing plant,there occurred come abnormal cases,such as the circulating volume of sulfur-rich methanol in the shell side of lean/rich methanol exchanger decreased,the temperature of sulfur-lean methanol in the tube side rose up,liquid accumulated in the lower part of the reabsorber,the level of the regenerating column became lower,and methanol was entrained in the tail gas,etc.As the condition became worse,carbon dioxide and sulfide content in the purified gas often exceeded the requirement in the standards.Therefore a series online maintenance schemes were set up and executed.When the plant started up again,the circulating volume of sulfur-rich methanol recovered to the normal,and the load of the plant increased from 65.0%before restart to 76.5%afterward.

关 键 词：低温甲醇洗 贫/富甲醇换热器 绕管式换热器 在线维护 鼓氮扰流 化学清洗 

分 类 号：TQ113.25[化学工程—无机化工] TQ223.162