灵活加氢改质MHUG-Ⅱ工艺在柴油加氢装置的应用  

Application of flexible hydro-upgrading process( MHUG-Ⅱ)in diesel hydrotreating unit

作　　者：赖全昌[1] 张琰彬[1] 

机构地区：[1]中国石化海南炼油化工有限公司,海南洋浦578101

出　　处：《炼油技术与工程》2014年第6期23-26,共4页Petroleum Refinery Engineering

摘　　要：中国石化海南炼油化工有限公司2.00 Mt/a柴油加氢精制装置柴油调合组分平均硫质量分数672μg/g、平均十六烷值47.9,难以满足生产国Ⅳ清洁柴油的要求。为了应对柴油质量升级的要求,采用分区进料灵活加氢改质MHUG-Ⅱ工艺,将装置扩能改造为2.48 Mt/a柴油加氢改质装置。MHUG-Ⅱ工艺设置加氢改质、加氢精制两个反应区,针对组成和十六烷值不同的柴油原料采用分区进料,低十六烷值、高芳烃含量原料进入加氢改质反应区,加氢改质反应区的流出物与十六烷值高的新鲜直馏柴油原料混合后进入加氢精制反应区,避免了直馏柴油中的高十六烷值组分即部分链烷烃过度裂化。工业运转结果表明,MHUG-Ⅱ工艺在生产国Ⅳ柴油时,柴油收率高达98.52%,化学氢耗低至0.84%。The average sulfur in diesel blending component in SINOPEC Hainan Refining ＆ Chemical Co.,Ltd.is as high as 672 ppm and average cetane number is 47.9 units,which can not meet the requirement for the production of Guo Ⅳ clean diesel.To meet the requirements of diesel quality upgrading,a flexible hydro-upgrading process MHUG-Ⅱ with separate feeding systems is applied to revamp and expand the 2.0 MM TPY hydrofining unit to a 2.48 MM TPY diesel oil hydro-upgrading unit.The MHUG-Ⅱ process consists of a hydro-upgrading reaction zone and a hydrofining reaction zone.The diesel feedstocks with different compositions and different cetane numbers are fed into different reaction zones,i.e.the diesel feedstock with low cetane number and high aromatic content is sent to hydro-upgrading reaction zone,and the effluent from hydroupgrading reaction zone is mixed with fresh straight-run diesel oil with high cetane number and then sent to hydrofining reaction zone,which can minimize overcracking of high-cetane-number paraffin in the straight-run diesel.The commercial operation shows that,when MHUG-Ⅱ process is applied to produce Guo Ⅳ diesel,the diesel yield is as high as 98.52％ and chemical hydrogen consumption is reduced to 0.84％.

关 键 词：柴油质量升级 加氢改质 MHUG-Ⅱ工艺 分区进料 技术改造 

分 类 号：TE626.24[石油与天然气工程—油气加工工程]