分隔壁精馏塔分离醇类混合物的模拟  

Simulation of alcohol mixture separation by divided-wall distillation column

作　　者：叶青[1] 钱春键[1] 裘兆蓉[1] 

机构地区：[1]江苏工业学院化工系,江苏常州213016

出　　处：《化学工程》2008年第2期1-4,共4页Chemical Engineering(China)

基　　金：江苏省自然科学基金资助项目(BK2004035);中国石油化工股份有限公司科技开发部基金资助项目(X505021)

摘　　要：以分隔壁精馏塔分离乙醇、正丁醇及正己醇为例,建立分隔壁精馏塔稳态模型。用Aspen Plus软件进行模拟,模拟数据与实验数据吻合良好。同时考察了分隔壁精馏塔内液体分配比对产品含量的影响及正丁醇液相组成分布情况。比较了采用分隔壁精馏塔和常规二塔流程分离此物系的节能情况。结果表明,由于分隔壁精馏塔能极大地减少返混现象的产生,故达到相同的分离要求,分隔壁精馏塔比常规精馏的流程更节能,采用分隔壁精馏塔分离此物系时,中间组分的摩尔分数越高,节能效果越好,当进料组成为n(C2H5O)∶n(C4H10O)∶n(C6H14O)=1∶3∶1时,可节能25.9%。分隔壁精馏塔技术是一种节能、经济的新工艺。A steady equilibrium stage model was established to simulate the separation of mixture components of ethanol, n-butanol and n-hexanol by divided-wall distillation column. The agreement was good between the predicted and the experimental data by Aspen Plus simulation. Liquid distribution ratio and the composition of n- butanol in column were systematically studied. The comparison of energy consumption between the conventional distillation sequences and the divided wall distillation column was presented. The results show that the divided wall distillation column is more suited for the middle components compositioff than other components. When the feed of n（C2H5O） ： n （C4H10O） ：n （C6H14O） is 1：3： 1, the divided-wall distillation can save energy over 25.9%, compared with conventional distillation sequences, which demonstrates that the divided-wall distillation column technology is a new energy-saving, cost-effective separation process.

关 键 词：分隔壁精馏塔 醇类 节能 

分 类 号：TQ019[化学工程]