饱和C_(5)和C_(6)组分加工工艺方案探析

Discussion on processing scheme of saturated C_(5) and C_(6) components

分别对饱和C_(5)和C_(6)组分生产异构化汽油工艺和炼化一体化组合工艺两种方案进行了介绍;并以某企业300 kt/a异构化装置C_(5)和C_(6)组分进料为例,从产品分布、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:饱和C_(5)和C_(6)组分可用于异构化生产汽油,采用吸附分离的异构化加工方案收益略优于其他异构化方案;乙烯、丙烯的价格(乙烯和丙烯按同价格考虑)与汽油价价差达到3000元/t以上时,炼化一体化工艺的收益高于生产异构化汽油的收益,当价差提高到4000元/t以上时,采用直接裂解的方案收益较高;炼化一体化工厂仍需考虑将饱和C_(5)和C_(6)组分用作化工原料,将饱和C_(5)和C_(6)组分进行吸附分离后异构体作为汽油的调合组分、正构体作为乙烯裂解原料有利于提高工厂的综合收益。

Two schemes of producing isomerized oil with saturated C_(5) and C_(6) components and refining petrochemical integration combined process are introduced respectively.Taking the feed of C_(5) and C_(6) components in a 300,000 TPY isomerization unit as an example,several processing processes are analyzed and compared from the aspects of product distribution,energy consumption and economy.The results show that the saturated C_(5) and C_(6) can be used as feedstocks for isomerization of gasoline and the cost of isomerization scheme with adsorption separation is slightly lower than that of other isomerization schemes.When the price difference between ethylene,propylene and gasoline reaches more than 3,000 yuan per ton,the income of refining petrochemical integration process is better than that of isomerization of gasoline.When the price difference reaches to more than 4,000 yuan per ton,the income of direct cracking scheme is better.In the integrated refining and chemical plant,it is still necessary to consider using C_(5) and C_(6) components as feedstocks.After adsorption separation of saturated C_(5) and C_(6) components,the isomers as gasoline and normal structure as ethylene cracking feedstocks are conducive to improve the comprehensive income of the plant.