摘要
某催化重整装置中,汽油产品终馏点达到230℃,远高于GB 17930—2016《车用汽油》中205℃的要求,对全厂汽油调和造成一定的困难。其生产流程包含白土精制脱烯烃环节,对白土塔前后汽油组分进行分析,结合白土失活后其表面聚集的大分子化合物的性质,发现在白土塔脱烯烃过程中,烯烃不断聚合为胶质,导致汽油终馏点升高。针对该问题,从产品回收率、能耗、动改可实施性等方面对比了增设重芳烃塔和二甲苯塔侧线(抽出气相汽油)的方案,结合装置改造特性,确定解决方案。
In a certain catalytic reforming unit,the final boiling point of gasoline products reaches 230℃,which is much higher than the requirement of 205℃ in GB 17930—2016"Gasoline for motor vehicles",causing certain difficulties in gasoline blending throughout the plant.The production process includes the olefins removement by white clay.By analyzing the gasoline components before and after the white clay tower,and combining the properties of the large molecular compounds accumulated on the surface of the deactivated white clay,it was found that during the refining process in white clay tower,olefins continuously polymerize into colloids,leading to an increase in the final boiling point of gasoline.In response to this issue,a comparison has been made between the schemes of adding a heavy aromatic hydrocarbon tower and a xylene tower sideline(extracting gas-phase gasoline)in terms of product recovery rate,energy consumption,and feasibility of equipment reconstruction.Based on the characteristics of the device reconstruction,a solution has been determined.
出处
《上海化工》
2025年第4期44-50,共7页
Shanghai Chemical Industry
关键词
重整装置
颗粒白土
终馏点
汽油
二甲苯
侧线气相抽出
Reforming unit
Granular clay
Final boiling point
Gasoline
Xylene
Side gas phase extraction
