重整生成油液相脱氯剂DL-1在连续催化重整装置的工业应用

COMMERCIAL APPLICATION OF LIQUID PHASE DECHLORINATION AGENT DL-1 FOR REFORMATE IN CONTINUOUS CATALYTIC REFORMING UNIT

针对中国石油大连石化公司2.2 Mt a连续催化重整装置因氯化物生成铵盐而造成脱戊烷塔塔顶空气冷却器及管道堵塞、腐蚀,生成油中氯化物会使芳烃抽提单元溶剂劣质化,并且原用金属氧化物液相脱氯剂M的效果并不理想等问题,改用中国石化石油化工科学研究院开发的液相脱氯剂DL-1。应用结果表明:液相脱氯剂DL-1的脱氯效果良好,脱氯罐出口的氯质量分数低于0.5μg g,同时满足脱氯罐床层压降不大于0.03 MPa的要求,单罐运转时间超过技术保证值,设备的堵塞、腐蚀问题得到有效缓解;芳烃抽提单元环丁砜劣化的趋势得到有效控制,溶剂再生塔内树脂的使用寿命明显延长,保证了装置的平稳运行。

Because of the combination of nitrogen compounds in raw materials and chlorides in reformate to form ammonium salts,the 2.2 Mt a CCR of PetroChina Dalian Petrochemical Company had the clogging and corrosion problems in air cooler at the top of de-pentane column and in pipeline.The solvent degradation of aromatics extraction unit occurred because of the equipment corrosion caused by chlorine in reformate and affected the normal operation of the unit.In 2014,dechlorination agent M was used.However,the dechlorination effect was not satisfactory until 2016 and the problems of ammonium salt blockage and solvent deterioration still existed.In December 2016,the dechlorination agent DL-1 developed by SINOPEC Research Institute of Petroleum Processing was adopted.The results showed that the agent DL-1 was effective to remove chloride from reformate and solved the problems of blockage and corrosion of equipment.The pH of solvent in extraction unit and the service life of resin were significantly improved,which ensured the smooth operation of the unit.