化工进展2018，Vol.37Issue(5)：2016-2022,7.DOI:10.16085/j.issn.1000-6613.2017-1621
萃取精馏制取无水乙醇过程不同节能方案的对比
Simulation and comparison of different energy saving schemes in extractive distillation process of ethanol-water system
摘要
Abstract
Anhydrous ethanol was produced from the ethanol-water mixture using ethylene glycol as the extractant. Using the process simulation software,the conventional extractive distillation process and four different types of energy saving technologies were simulated and optimized,including double-effect distillation,vapor recompression distillation,dividing wall column distillation and internally heat integrated distillation. The design specification was as follows:the purity of ethanol should be no less than 99.5%,the purity of recovered ethylene glycol should be no less than 99.9%,and the purity of waste water should be greater than 99.5%. Under the same design basis and requirements,the optimum operating parameters of each process were obtained,and different processes were compared from the energy saving effect and economic analysis. The results revealed that although the internally heat integrated distillation technology was the most energy efficient process reducing the energy consumption by 14.1% compared with the conventional extractive distillation process,the most economic technology was double-effect extractive distillation process decreasing the total annual cost by 7.2%. This study provides the theoretical basis and design parameters for the industrialization of the extractive distillation process to produce anhydrous ethanol from the ethanol-water system.关键词
无水乙醇/萃取精馏/模拟/优化/节能Key words
anhydrous ethanol/extraction distillation/simulation/optimization/energy savings分类
化学化工引用本文复制引用
林子昕,安星,安维中,朱建民..萃取精馏制取无水乙醇过程不同节能方案的对比[J].化工进展,2018,37(5):2016-2022,7.基金项目
国家自然青年科学基金项目(21306179). （21306179）
