满足国Ⅵ排放标准汽油生产方案的研究

SOLUTIONS FOR PRODUCTION OF CHINA Ⅵ GASOLINE

在分析全厂汽油生产现状的基础上,设计了14种满足国Ⅵ排放标准汽油(简称国Ⅵ汽油)的质量升级方案,运用全厂流程模拟技术对各方案进行测算。结果表明:若国Ⅵ汽油质量升级第一阶段标准为烯烃体积分数不大于18%,采用催化裂化汽油降烯烃-异构化-烷基化的方案最优,若国Ⅵ汽油质量升级第二阶段标准为烯烃体积分数不大于15%,采用S Zorb精制汽油醚化-一次通过流程异构化方案最优;在新建重整装置的方案中,新建重整-S Zorb精制汽油醚化-循环流程异构化的方案最优;醚化-异构化组合技术是生产国Ⅵ汽油效益最好、成本最低的技术路线。

Based on the analysis of present gasoline production and the plant process simulation,14 solutions for production of ChinaⅥ gasoline were discussed.The results show that in the first stage of gasoline quality upgrading,in which olefin volume content is less than 18%,the case consisted of FCC for olefin reduction-isomerization-alkylation is the best.In the second stage of gasoline quality upgrading in which olefin volume content is less than 15%,the process composed of large etherification（refined gasoline from two S Zorb units as feed）plus once-through mode isomerization is the best.For the solution including a new set of reforming unit,one new reforming unit-small etherification（refined gasoline from one S Zorb unit as feed）-isomerization with cycling mode is the best.It is concluded that the combination process of etherification and isomerization is recommended because it costs least and has the best benefit.