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

TECHNOLOGY OF BLENDING SECONDARY DIESELS IN HYDROCRACKING FEEDS FOR MAXIMIZING JET FUEL

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1.5mm,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。

In order to solve the problem of low load of hydrocracking unit and poor quality of secondary 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 compared.Blending coker diesel as feed,the outlet temperature of the second bed of refining reactor decreases by about 8.6 ℃,the total temperature drop of refining reactor declines by 19.4 ℃.The total pressure drop of refining and cracking reactors decreases.When the conversion is 68.0%,the hydrogen consumptions of blending FCC diesel and coker diesel are 3.48% and 3.10%,respectively.Aromatics content 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 by0.7,the overall energy consumption showed a slight increase of 1.6 MJ/t.