300万t/a柴油加氢装置国Ⅴ质量升级改造技术应用

Application of national standard Ⅴ quality upgrading and reconstruction technology in 3 Mt/a diesel hydrogenation unit

为了实现柴油国Ⅴ质量升级,对中国石油兰州石化公司3 Mt/a柴油加氢装置进行新增1台加氢精制反应器与原反应器串联、增加催化剂装填量、降低体积空速等升级改造。结果表明:升级改造后,在装置负荷为380 t/h,氢气/原料油(体积比)为350∶1,氢分压为7.4 MPa的条件下,精制柴油和石脑油中的硫含量均有所降低,精制柴油含硫量为5.83μg/g,可达到国Ⅴ质量标准要求。

In order to realize diesel quality upgra- ding of national standard V, the upgrading and re- construction measures were taken, including adding a new hydrorefining unit in tandem with the original reactor, increasing catalyst loading, decreasing volume velocity, etc, in a 3 Mt/a diesel hydrogenation unit of Lanzhou Petrochemical Company, PetroChi- na. The results showed that after upgrading and reconstruction, under the conditions of unit loading 380 t/h,volume ratio of hydrogen to oil 350： 1, hydrogen partial pressure 7.4 MPa, the sulfur content of refined diesel and naphtha both decreased, and the sulfur content in refined diesel was 5.83 μg/g, which could reach the requirement of national standard V.