基于Aspen酯交换法异丙醇生产工艺过程模拟与节能分析  

Process simulation and energy saving analysis of isopropanol production by transesterification method based on Aspen

作　　者：杨伟[1] 周杰锋 郑文芝[1] 乔智威 邹汉波[1] YANG Wei;ZHOU Jie-feng;ZHENG Wen-zhi;QIAO Zhi-wei;ZOU Han-bo(School of Chemistry and Chemical Engineering,Guangzhou University,Guangzhou 510006,China;School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]广州大学化学化工学院,广东广州510006 [2]华南理工大学化学化工学院,广东广州510640

出　　处：《广州大学学报（自然科学版）》2024年第5期37-47,共11页Journal of Guangzhou University:Natural Science Edition

基　　金：广州市科技计划资助项目(2024B03J1277)。

摘　　要：基于NRTL-RK热力学方法,采用甲醇钠固体催化剂,使用Aspen Plus对酯交换法异丙醇生产工艺进行模拟及节能优化设计。以年产五万吨异丙醇项目为基础,综合考虑反应平衡、后续分离难度以及原料成本等因素,使用反应精馏塔作为异丙醇合成反应器,塔釜出料为99.99 wt%异丙醇。基于反应精馏塔塔顶流出物的热力学特点设计变压精馏系统,实现回收副产品醋酸甲酯与原料甲醇的目标。使用热泵精馏技术与双效精馏技术分别对反应精馏系统与变压精馏系统进行节能改造,装置分别节能为60.2%与43.9%,对换热网络能量进一步集成,最终能耗下降59.2%。Based on the thermodynamic method,NRTL-RK,Aspen plus software was used to simu-late isopropyl alcohol production process by transesterification and optimized design of energy saving,which is catalyzed by sodium methanol solid catalyst.The project used 50000 tons isopropyl alcohol production per year,while the factors of reaction equilibrium,separation difficulty and cost of raw ma-terials are considered for reactor design.The reactive distillation column is set as isopropyl alcohol synthesis reactor.The bottoms flow is 99.99 wt%of isopropyl alcohol.The pressure swing distillation system design is based on the thermal characteristics of flow from the top of the reactive distillation column,which can achieve the goals of recycle the byproducts,methyl acetate,and the raw material,methanol.Heat pump distillation and double effect distillation technologies are adopted in reactive distillation and pressure swing distillation systems,respectively.While the energy consumption values decrease 60.2%and 43.9%respectively,the heat exchange network energy was further integrated,and the final energy consumption was reduced by 59.2%.

关 键 词：异丙醇 酯交换法 变压精馏 反应精馏 能量集成 

分 类 号：TQ41[化学工程]