加氢裂化装置掺炼二次加工柴油多产喷气燃料的技术应用

摘要

In order to solve the problem of low load of hydrocracking unit and poor quality of sec-ondary diesel,SINOPEC Beijing Yanshan Company adjusted the feedstock compositions of hydrocracking unit by blending a certain proportion of FCC diesel or coker diesel. The two solutions were com-pared. Blending coker diesel as feed,the outlet temperature of the second bed of refining reactor decrea-ses by about 8. 6 ℃,the total temperature drop of refining reactor declines by 19. 4 ℃. The total pres-sure drop of refining and cracking reactors decreases. When the conversion is 68. 0％,the hydrogen con-sumptions of blending FCC diesel and coker diesel are 3. 48％ and 3. 10％,respectively. Aromatics con-tent in aviation fuel is down from 15. 7％ to 6. 1％,the smoke point increases 1. 5 mm,the yield of diesel increases 7. 26 percent points,the cetane number rises 3 points,and the BMCI value of tail oil reduces by 0. 7 ,the overall energy consumption showed a slight increase of 1. 6 MJ/t.%中国石化北京燕山分公司为解决加氢裂化装置负荷低、厂内劣质柴油品质差的问题,在加氢裂化装置原料中掺炼一定比例的催化裂化柴油(简称催柴)或焦化柴油(简称焦柴).介绍了加氢裂化装置分别掺炼催柴和焦柴的技术对比,由掺炼催柴改为掺炼焦柴后,精制反应器二床层出口温度下降8.6℃,精制反应器总温升下降19.4℃,精制反应器和裂化反应器总压降均减小;在转化率约为68％时,掺炼催柴时的氢耗为3.48％,掺炼焦柴时的氢耗约为3.10％;喷气燃料中芳烃体积分数由15.7％降至6.1％,烟点上升1.5 mm,柴油收率增加7.26百分点,十六烷值增加3个单位,尾油BMCI值降低0.7,综合能耗上升1.6 MJ/t.