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

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(催柴)或焦化柴油(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，由催柴改至焦柴后：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。

STUDY ON RHT TECHNOLOGY FOR DEEP DESULFURIZATION

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 by 0.7, the overall energy consumption showed a slight increase of 1.6 MJ/t.