C_(5)C_(6)异构化吸附分离组合工艺方案比较

Comparison of Isomerization and Adsorption Separation Combined Process of Saturated C_(5) and C_(6)

分别对饱和C_(5)和C_(6)组分采用吸附分离和异构化组合采用先后顺序的工艺方案进行了介绍;并以某企业300kt/a异构化装置C_(5)和C_(6)组分进料为例,从产品性质、主要设备规格、能耗和经济性等方面对几种加工工艺进行了分析比较。结果表明:采用先吸附分离后异构化的加工方案的而辛烷值要略低于先异构化后吸附分离的加工方案;组合工艺的收益主要取决于辛烷值的增值,设置脱异戊烷塔可降低装置投资但显著增加能耗,采用先吸附分离后异构化的加工方案经济性要优于先异构化后吸附分离的加工方案并且具有更大的抗风险能力。

The sequential process of adsorption separation and isomerization of saturated C_(5) and C_(6) components were introduced respectively;Taking an example of a 300 kt/a isomerization unit,several processes are analyzed and compared from product properties,main equipment specifications,energy consumption and economy,and the influence of setting a deisopentaner on the combined process is also compared.The results show that RON of adsorption separation before isomerization is slightly lower than that of adsorption separation after isomerization;The benefits of the combined process mainly depends on the value of increased RON.Deisopentaner can reduce the investment but significantly increase the energy consumption.The process that adsorption separation before isomerization is more economical than the process that adsorption separation after isomerization.When the refinery selects the combined process,the process that adsorption separation before isomerization has greater risk resistance capabilities than that adsorption separation after isomerization.