热泵自夹带共沸精馏分离乙醇-甲苯-水三元共沸混合物  

Heat-Pump Azeotropic Distillation for Ternary Azeotrope Ethanol-Toluene-Water Separation

作　　者：吕新宇[1] 赵磊[1] 汪文丞 单俊 邱滔[1] 

机构地区：[1]常州大学石油化工学院,江苏常州213164

出　　处：《常州大学学报（自然科学版）》2017年第6期26-31,共6页Journal of Changzhou University：Natural Science Edition

摘　　要：基于乙醇-甲苯-水共沸物系中的甲苯可以作为夹带剂的特点,采用自夹带共沸精馏工艺分离乙醇-甲苯-水共沸物系。为了降低自夹带共沸精馏工艺的能耗,提出了热泵自夹带共沸精馏工艺。选择NRTL物性方法,使用Aspen Plus软件,对自夹带共沸精馏工艺和热泵自夹带共沸精馏工艺进行稳态严格模拟。为了得到最优条件,提出经济优化方案,并建立优化迭代流程。结果表明:乙醇、甲苯和水的质量分数分别达到99.9%,99.9%和99.5%;相比于普通自夹带共沸精馏工艺,热泵自夹带共沸精馏工艺能耗降低62.70%,全年总费用降低8.09%。Based on the characteristics of toluene in ethanol toluene water azeotrope system as an entrainer,ethanol toluene water azeotrope system was separated by self entrainment azeotropic distillation process.In order to save energy,heat-pump azeotropic distillation is proposed.The process and economic optimization for azeotropic distillation and heat-pump azeotropic distillation are performed by Aspen Plus software.NRTL model is chosen as the property package in the simulation.According to the total annual cost,optimization programs are used to get optimal configurations of the two distillation methods.The result shows that the purity of ethanol,toluene and water product can reach 99.9%,99.9% and 99.5% respectively.It concludes that the heat-pump azeotropic distillation can save 61.94% and 9.20% in the energy consumption and total annual cost respectively compared with the azeotropic distillation.

关 键 词：乙醇 甲苯 水 三元共沸物 热泵共沸精馏 经济优化 

分 类 号：TQ028[化学工程]