重汽油萃取精馏制溶剂油工艺设计与模拟

Process design and simulation for production of solvent oil by extractive distillation of heavy gasoline

提出了以汽油加氢装置的切轻重汽油为原料产重芳烃溶剂油新工艺,从而提高资源利用效率。采用萃取精馏的方法,首先确定环丁砜作为重芳烃与非芳组分分离的基础溶剂,并通过复配萘的方法降低萃取溶剂的沸点,解决了萃取溶剂高温分解的问题,实现了重芳烃分离过程的平稳运行。随后利用Aspen Plus软件模拟计算并设计加氢重汽油制重芳烃溶剂油产品工艺流程,确定了萃取剂配比及用量,并优化萃取精馏塔和溶剂回收塔工艺参数,最终获得满足溶剂油产品指标的重芳烃产品。

To achieve a higher resource utilization efficiency,a novel heavy aromatics solvent oil production process is proposed,which takes heavy gasoline from gasoline hydrogenation plant as raw material,tetramethylene sulfone as base solvent and the extractive distillation method as the way to separate heavy aromatics and non-aromatics.A light component,naphthalene,is added to reduce the boiling point of the extraction solvent to solve the problem of weak thermal stability,and the process operates in a stable way.The process is simulated and optimized by Aspen Plus software,and the ratio and dosage of the compound solvent are determined.The optimal parameters of the extractive distillation tower and solvent recovery tower are obtained through optimization,and qualified heavy aromatics solvent oil is obtained.