分离乙醇-碳酸二甲酯二元共沸物的新工艺初探  

Preliminary study on the novel process for separating binary azeotrope ethanol-dimethyl carbonate

作　　者：张文星[1] 阮奇[1] 吴开金[2] 李峰 

机构地区：[1]福州大学石油化工学院,福建福州350108 [2]福建省林业科学研究院,福建福州350012 [3]中石化森美(福建)石油有限公司,福建福州350003

出　　处：《计算机与应用化学》2015年第7期821-826,共6页Computers and Applied Chemistry

基　　金：福建省林业厅资助项目(闽林科[2011]3号)

摘　　要：为了探寻一种分离乙醇-碳酸二甲酯(简称DMC)二元共沸物的高效节能新工艺,首先在Aspen Plus软件平台上建立了分隔壁萃取精馏塔(简称EDWC)分离乙醇-DMC的三塔等效新工艺流程,然后采用单变量灵敏度分析法模拟新工艺中6个可调设计变量对新工艺分离效果和能耗的影响规律,并分析得到它们的最佳值,最后在最佳设计和操作条件下模拟新工艺,结果表明,对相同的分离任务和要求,新工艺与文献已报道的双塔工艺流程相比,前者的再沸器能耗比后者节省高达43%,而设备投资比后者更少。EDWC是分离乙醇-DMC共沸物的既高效节能又节省设备投资的新工艺。In order to explore a novel process of high efficiency and energy saving for separating binary azeotrope ethanol-dimethyl carbonate（DMC）, the following research is carried out： firstly, a new process of three columns equivalent model of extractive dividing wall column （EDWC） is extablished for separating ethanol-DMC by Aspen Plus. Secondly, the single variable sensitivity analysis is adopted to simulate the influence laws of the six adjustable design variables of the novel process on the separating effect and energy consumption and obtain their optimal values by analyzing. Finally, the novel process is simulated under the optimal design and operating conditions. The result shows that the novel process can save up to 43 % of reboiler energy consumption and has less equipment investment, compared to the double-column process which has been reported in the same separation task and requirements. EDWC is a novel process of both high efficiency and energy saving and saving the equipment investment in the separation of binary azeotrope ethanol-DMC.

关 键 词：碳酸二甲酯 乙醇 分隔壁萃取精馏塔 模拟 节能 

分 类 号：TQ214[化学工程—有机化工]