Influence of mixture and separation requirements on optimal configuration for ternary distillation

doi:10.11949/j.issn.0438-1157.20160908

CIESC Journal ›› 2017, Vol. 68 ›› Issue (2): 708-715.DOI: 10.11949/j.issn.0438-1157.20160908

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Influence of mixture and separation requirements on optimal configuration for ternary distillation

TIAN Fang^1,2,3, YUAN Ye^1,2, YUAN Xigang^1,2,3, LUO Yiqing^1,2,3

1. State Key Laboratory of Chemical Engineering, Tianjin 300072, China;
2. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
3. Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China

Received:2016-07-04 Revised:2016-12-13 Online:2017-02-05 Published:2017-02-05
Supported by:
supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China (2013BAA03B01).

物系和分离要求对最优三组元精馏结构选择的影响

田芳^1,2,3, 袁野^1,2, 袁希钢^1,2,3, 罗祎青^1,2,3

1. 化学工程联合国家重点实验室, 天津 300072;
2. 天津大学化工学院, 天津 300072;
3. 天津化学化工协调创新中心, 天津 300072

通讯作者: 袁希钢
基金资助:
国家科技支撑计划项目（2013BAA03B01）。

Abstract

Abstract:

In the present work, rigorous simulation and optimization are used for analysis and comparison, in terms of total annual cost (TAC), five kinds of promising distillation configurations, including simple columns sequences with or without heat-integration, complex column with side-rectifier or side-stripper, and fully thermally coupled (dividing-wall column (DWC)). The analysis results show that the feed composition, the ease of separation index, or the ratio of the relative volatilities of the two pairs of adjacent components, and the separation extent have strong influence on the selection of the optimal distillation configuration. Based on the results of the analysis, influential factors for selecting the best distillation scheme for separating ternary mixtures are discussed.

Key words: ternary distillation, heat-integration, thermal coupling, simulation and optimization, separation difficulty

摘要：

针对三组分混合物的分离，选取6种不同分离指数的物系，根据多种进料组成和分离要求，对传统的直接分离序列和间接分离序列及其热集成方式、部分热耦合精馏中的侧线精馏和侧线提馏、完全热耦合结构（即隔板塔）进行了模拟与优化设计，并以年度总费用最低为目标选出各种情况下的最优精馏结构。结果表明，分离指数、进料组成及分离要求都对精馏结构的优化选择都有显著影响，热集成精馏、部分热耦合以及完全热耦合精馏结构分别在不同条件下各具有优势。根据分析结果，对影响最优三组元分离精馏结构的因素进行归纳。

关键词: 三元精馏, 热集成, 热耦合, 模拟优化, 分离难度

CLC Number:

TQ028.8

TIAN Fang, YUAN Ye, YUAN Xigang, LUO Yiqing. Influence of mixture and separation requirements on optimal configuration for ternary distillation[J]. CIESC Journal, 2017, 68(2): 708-715.

田芳, 袁野, 袁希钢, 罗祎青. 物系和分离要求对最优三组元精馏结构选择的影响[J]. 化工学报, 2017, 68(2): 708-715.

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Influence of mixture and separation requirements on optimal configuration for ternary distillation

物系和分离要求对最优三组元精馏结构选择的影响

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