分隔壁共沸精馏塔分离叔丁醇水混合物的模拟研究  

Simulation of dividing-wall azeotropic distillation column for separation of tert-butanol from water

作　　者：叶青[1] 

机构地区：[1]江苏工业学院化工系,江苏常州213164

出　　处：《天然气化工—C1化学与化工》2009年第5期17-20,23,共5页Natural Gas Chemical Industry

摘　　要：提出了一种单塔共沸精馏分离叔丁醇水混合物的新工艺,新工艺采用分隔壁共沸精馏塔(DWC-A)替代常规共沸精馏流程的共沸精馏塔及回收塔,不仅节省了设备投资,而且降低了总能耗。利用ASPENPLUS模拟软件,对分隔壁共沸精馏塔及常规萃取流程进行了模拟。分隔壁共沸精馏塔的操作条件为:主塔理论板数为25块,副塔理论板数为10块,环已烷为共沸剂,在此条件下,比较了常规萃取精馏流程与分隔壁精馏塔内温度、液相组成及汽液相流量的变化。结果表明,分隔壁共沸精馏塔比常规的两塔萃取精馏流程节能17.8%。A novel single column azeotropic distillation process was proposed for separating tea-butanol from tea-butanol/water mixture, in which the dividing-wall azeotropic distillation column was used to instead of the conventional azeotropic distillation column and recovery column, that could result in equipment investment reducing and energy saving. The dividing-wall azeotropic distillation column and the conventional azeotropie distillation process were simulated by the AspenPlus software. The op- eration parameters for the dividing-wall azeotropic distillation column were proposed as follows： main column theoretical stages of 25, auxiliary column theoretical stages of 10, and cyclohexane as entrainer. Temperature, composition and flow rate profiles in the dividing-wall azeotropic distillation column and the conventional azeotropic distillation process were compared. The results showed that the dividing-wall azeotropic distillation column could reduce energy consumption by 17.8% compared with the conventional azeotropic distillation process.

关 键 词：分隔壁塔 共沸精馏 叔丁醇水混合物 环己烷 流程模拟 

分 类 号：TQ018[化学工程]