摘要
四氢呋喃(THF)、甲醇(MeOH)和乙醇(EtOH)三元体系包含一条精馏边界与两个共沸点,导致采用常规精馏技术分离尤为困难。为了解决这一问题,本文探究了三元体系THF/MeOH/EtOH在不同压力下相图的变化趋势及共沸点的移动方向,基于精馏边界、剩余曲线等热力学拓扑理论分析变压精馏分离三元共沸混合物THF/MeOH/EtOH的可行性。进一步地,结合剩余曲线、组分平衡线和精馏边界等热力学拓扑理论对两种变压精馏分离序列进行工艺概念设计。最后,通过组件对象模型(COM)技术连接Aspen Plus和Matlab,采用多目标粒子群算法以经济和安全指标为目标函数对不同分离序列进行优化设计。结果表明:热力学拓扑理论分析可以快速实现变压精馏分离三元共沸混合物的概念设计;相比于EtOH-THF-MeOH分离序列,EtOH-MeOH-THF分离序列在经济和安全性能方面表现出了较强的优势。
The ternary system of tetrahydrofuran(THF),methanol(MeOH),and ethanol(EtOH),characterized by one distillation boundary and two azeotropic points,presents significant challenges for conventional distillation separation.To overcome this limitation,the variation trend of the phase diagram and the movement direction of azeotropic point of the ternary system THF/MeOH/EtOH under different pressures were investigated.Based on thermodynamic topological theories such as distillation boundaries and residual curves,the feasibility of pressure-swing distillation separation of ternary azeotropic mixtures THF/MeOH/EtOH was analyzed.Furthermore,based on thermodynamic topological theories such as residual curves,component equilibrium lines,and distillation boundaries,process conceptual design was carried out for two pressure-swing distillation separation sequences.Through COM technology integration between Aspen Plus and M atlab,a multi-objective particle swarm optimization(MOPSO)algorithm was implemented to optimize both sequences,with economic and safety metrics serving as objective functions.The results indicat ed that thermodynamic topological theory analysis c ould quickly realize the conceptual design of pressure-swing distillation separation of ternary azeotropic mixtures.Compared to the EtOH THF-MeOH separation sequence,the EtOH-MeOH-THF separation sequence exhib ited strong advantages in terms of economic and safety performance.
作者
杨傲
邓苇
黎勇
罗婧
王梓霖
张俊
申威峰
YANG Ao;DENG Wei;LI Yong;LUO Jing;WANG Zilin;ZHANG Jun;SHEN Weifeng(College of Safety Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;School of Chemistry and Chemical Engineering,Chongqing University,Chongqing 401331,China)
出处
《化工进展》
北大核心
2025年第8期4582-4593,共12页
Chemical Industry and Engineering Progress
基金
国家自然科学基金(22308037)
中国博士后基金(2024T171135,2024M754114)。
关键词
变压精馏
优化设计
三元共沸混合物
优化
安全
分离
pressure-swing distillation
optimal design
ternary azeotropic mixture
optimization
safety
separation
作者简介
第一作者:杨傲(1991-),男,博士,副教授,研究方向为智能化工安全与过程优化设计。E-mail:aoyang2021@cqust.edu.cn;通信作者:申威峰,教授,博士生导师,研究方向为智能化工与过程强化。E-mail:shenweifeng@cqu.edu.cn。
