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。
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.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2017年第2期708-715,共8页
CIESC Journal
基金
国家科技支撑计划项目(2013BAA03B01)~~
关键词
三元精馏
热集成
热耦合
模拟优化
分离难度
ternary distillation
heat-integration
thermal coupling
simulation and optimization
separation difficulty
