间壁式精馏塔在芳烃分离工艺中的研究与应用  

Research and Application of a dividing wall column for separating of a multi-component Aromatics mixture

作　　者：彭雷 孙巍[1] 杜增智[1] 王健红[1] 谭聪 

机构地区：[1]北京化工大学化学工程学院,北京100029 [2]中国机械国际合作有限公司,北京100080

出　　处：《计算机与应用化学》2017年第9期681-684,共4页Computers and Applied Chemistry

基　　金：国家自然科学基金资助项目(21506007);中央高校基本科研业务费专项资金资助(JD1714)

摘　　要：芳烃混合物由炼油厂的石脑油催化重整装置产生,芳烃分离物是重要的化工原料。传统工艺中,采用两塔序列从混合芳烃中依次分离出苯,甲苯,二甲苯和重组分等产品。本文以国内某石化企业实际芳烃分离工艺为研究对象,采用间壁式精馏塔工艺代替传统的两塔序列工艺,使用gPROMS模拟软件对新工艺过程进行建模和模拟计算。通过对间壁塔的回流比、气相分配比、液相分配比、塔顶产品量等参数的优化,在满足产品纯度要求下,得到了最优工艺操作条件。对两种工艺的分离效果的比较分析,表明间壁式精馏塔工艺比传统两塔序列工艺节能19.57%。The aromatics mixture is yielded from petroleum catalytic refining in a petrochemical plant, as an important chemical raw material, the products are separated by binary distillation columns for benzene, toluene, xylene and heavy components in sequence in traditional process. In this paper, the actual aromatics separation process of a petrochemical plant is taken as an example to compare the capability of dividing wall column（DWC）with the convention distillation columns（CDC） process via simulation. Using the g PROMS to model and simulate the separation process in DWC. The optimum operating conditions are obtained under the requirement of product purity by optimizing the parameters such as the reflux ratio, the liquid split ratio, the vapor split ratio, the side-draw flowrates and the distillate flowrate. The results are shown that an energy saving of 19.57% is achieved by DWC over a CDC.

关 键 词：间壁式精馏塔 芳烃分离 节能 gPROMS 

分 类 号：TQ241.1[化学工程—有机化工] TP391.9[自动化与计算机技术—计算机应用技术]