[an error occurred while processing this directive]
化学工业与工程
 首页 |  在线投稿 |  期刊介绍 |  编 委 会 |  投稿指南 |  期刊订阅 |  下载中心 |  出版伦理 |  联系我们 |  English
化学工业与工程 2015, Vol. 32 Issue (4) :50-55    DOI: 10.13353/j.issn.1004.9533.2015.04.010
化工过程与设备 最新目录 | 下期目录 | 过刊浏览 | 高级检索 << | >>
乙醇脱水塔内两相和三相共沸精馏
韩振为1,2, 范永梅1,2, 刘彤1,2
1. 天津大学化工学院, 天津 300072;
2. 天津大学精馏技术国家工程中心, 天津 300072
Two-Phase and Three-Phase Azeotropic Distillation Investigation in Ethanol Dehydration Column
Han Zhenwei1,2, Fan Yongmei1,2, Liu Tong1,2
1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2. National Engineering and Research Center of Distillation Technology, Tianjin 300072, China

摘要
参考文献
相关文章
Download: PDF (1757KB)   HTML ()   Export: BibTeX or EndNote (RIS)      Supporting Info
摘要 

研究了乙醇脱水塔内的两相共沸精馏和汽液液三相共沸精馏过程。利用Aspen plus模拟软件对乙醇脱水塔内4种工况的精馏曲线、共沸剂浓度分布、回流量和再沸器能耗进行了分析比较。结果表明,苯做共沸剂时,脱水塔内两相共沸精馏和汽液液三相共沸精馏的精馏曲线、共沸剂浓度分布、回流量和再沸器能耗相近,脱水塔精馏曲线都跨越了精馏边界,并且共沸剂在塔内大多数板上都有较高浓度分布。而环己烷做共沸剂时,两相共沸精馏工况和汽液液三相共沸精馏工况条件下的脱水塔内精馏曲线、共沸剂浓度分布、回流量和再沸器能耗有较大差别。汽液液三相共沸精馏工况条件下,环己烷在塔内大多数板上有较高浓度分布,起到较好的脱水作用,而两相共沸精馏工况条件下脱水塔内共沸剂仅分布在塔顶几块塔板上,塔内多数板上没有起到共沸剂作用。

Service
把本文推荐给朋友
加入我的书架
加入引用管理器
Email Alert
RSS
作者相关文章
韩振为
范永梅
刘彤
关键词Aspen;   两相共沸精馏;   汽液液三相共沸精馏     
Abstract

In this paper, two-phase azeotropic distillation and VLL three-phase azeotropic distillation process in ethanol dehydration tower were studied. Distillation curves, entrainer concentration distribution, reflux flow and energy consumption of ethanol dehydration tower in four conditions were analyzed and compared by Aspen plus simulation software. The results reveal that distillation curves, entrainer concentration distribution, reflux flow and energy consumption are about the same for two-phase and VLL three-phase azeotropic dehydration column when benzene is selected as the entrainer, meanwhile, the distillation curves stride over the distillation boundary, and the entrainer concentration on most trays remains high. However when cyclohexane is selected as the entrainer, distillation curves, entrainer concentration distribution, reflux flow and energy consumption are quite different in VLL three-phase azeotropic distillation from those in two-phase azeotropic distillation cases in the dehydration column. In the case of VLL three-phase azeotropic distillation, cyclohexane has a relatively high concentration on most trays and plays a good role as a dehydrating agent; but in the two-phase azeotropic dehydration column,entrainer only exists on a few trays at the top of the tower, and does not contribute to azeotropic distillation process on most trays.

KeywordsAspen;   two-phase azeotropic distillation;   VLL three-phase azeotropic distillation     
Received 2013-05-09;
Corresponding Authors: 韩振为,E-mail: hanzhenwei@ tju.edu.cn。     Email: hanzhenwei@tju.edu.cn
About author: 韩振为(1964-),男,副研究员,主要研究方向为传质与分离、过程节能、精馏等。
引用本文:   
韩振为, 范永梅, 刘彤.乙醇脱水塔内两相和三相共沸精馏[J].  化学工业与工程, 2015,32(4): 50-55
Han Zhenwei, Fan Yongmei, Liu Tong.Two-Phase and Three-Phase Azeotropic Distillation Investigation in Ethanol Dehydration Column[J].  Chemcial Industry and Engineering, 2015,32(4): 50-55
Copyright 2010 by 化学工业与工程