分壁精馏塔分离石脑油芳烃抽提原料的模拟研究  

SIMULATION OF AROMATIC EXTRACTION FEEDSTOCK SEPARATION BY DIVIDING-WALL COLUMN

作　　者：高景山[1] 杨剑[2] 张英[1] 凌昊[2] 

机构地区：[1]中国石化抚顺石油化工研究院,辽宁抚顺113001 [2]华东理工大学化学工程联合国家重点实验室

出　　处：《石油炼制与化工》2015年第8期54-60,共7页Petroleum Processing and Petrochemicals

基　　金：国家自然科学基金资助项目(21476081);上海市教育委员会科研创新重点项目(14ZZ058)

摘　　要：建立了石脑油芳烃抽提原料的分类集总,通过分壁精馏塔的严格稳态模拟,确定了塔的结构参数和工艺操作条件,实现了塔顶产品中苯质量分数小于1%、侧线采出比不大于75%、侧线中间组分（C6~C8）质量收率99%的分离目标。在Aspen Dynamic环境下构建分壁精馏塔动态控制模型,三回路温度控制方案研究结果表明,分壁精馏塔可以很好地完成目标产品的分离,带有前馈的温度控制策略可很好地应对进料组成的波动,所需稳定时间较短,稳定后的产品质量符合分离要求。A new classified lumped model for aromatic extraction feedstock was proposed.And by strict steady-state simulation of DWC and lumped model,the column structure parameters and operation conditions were determined,resulting in the side stream withdraw ratio less than 75%,benzene in the top stream less than 1%（w）,and the yield of C6—C8fraction in the side stream reaches 99%.Using Aspen Dynamic,a dynamic control structure with three control loops and feedforward controllers was established.The dynamic simulation shows that dividing wall column is a good way to complete the separation of target products;and the temperature control strategy with feedforward can be very good in dealing with feed composition and flow rate fluctuations,the stable time is shorter and the qualities of the products conform to the requirements of the separation.

关 键 词：分壁精馏塔 芳烃抽提 原料分离 稳态模拟 动态控制 

分 类 号：TQ241[化学工程—有机化工]