满足国Ⅵ排放标准汽油生产方案的研究

摘要

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 China Ⅵ 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.