石油学报(石油加工) ›› 2019, Vol. 35 ›› Issue (5): 938-947.doi: 10.3969/j.issn.1001-8719.2019.05.015

• 研究报告 • 上一篇    下一篇

共沸精馏分离生物醇-水混合物的模拟与优化

刘通, 叶青, 陈景行, 岑昊, 樊玉锋   

  1. 常州大学 石油化工学院,江苏 常州 213164
  • 收稿日期:2018-09-13 修回日期:2019-03-16 出版日期:2019-09-25 发布日期:2020-04-01
  • 通讯作者: 叶青,女,教授,从事化工过程方面的研究,E-mail:huagonglou508@126.com E-mail:huagonglou508@126.com
  • 作者简介:刘通,男,硕士研究生,从事传质与分离新型分离技术方面的研究
  • 基金资助:
    国家自然科学基金青年科学基金项目(21706017)资助

Simulation and Optimizationon Separation of Bioalcohol and Water Mixture With Azeotropic Distillation

LIU Tong, YE Qing, CHEN Jingxing, CEN Hao, FAN Yufeng   

  1. Institute of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
  • Received:2018-09-13 Revised:2019-03-16 Online:2019-09-25 Published:2020-04-01

摘要: 针对液液萃取的异丙醇正丁醇-乙醇水(IBEH2O)体系,采用共沸精馏方法分离其中的水;并利用化工软件Aspen Plus对发酵产物IBEH2O体系的分离提纯进行流程模拟,设计了精馏流程,筛选了共沸剂,考察了共沸剂的适宜用量,优化了操作条件,得到了精馏流程最优、最经济的操作条件。结果表明:IBEH2O体系分离提纯优选的共沸剂为甲基叔丁基醚(MTBE);最佳精馏流程的共沸剂循环量为58 kmol/h,理论塔板总数为15,进料位置在塔上部第3块塔板处;提纯得到混合醇产品中IBE的摩尔分数可达到99.6%;且此时共沸精馏流程经济最优。

关键词: 生物醇, 汽油添加剂, 共沸精馏, 过程模拟

Abstract: Water in the isopropanolbutanolethanolwater (IBEH2O) system is separated by azeotropic distillation process after liquidliquid extraction. Aspen Plus is used to simulate the continuous azotropic distillation process. Effects of entrainer flow rate and output quantity at the bottom and feed location on the product purity and heat duty are analyzed to obtain the optimal operation parameters. Simulation results indicate that methyl tertbutyl ether (MTBE) can be used as azeotropic entrainer. From the simulation results, it can be concluded that the optimum process operation conditions are entrainer flow rate 58 kmol/h, theoretical stage number 15 and feed location 3. At the above operation conditions, 996% (molar fraction) purity IBE can be achieved, and the best economic performance in the azeotropic distillation process can be obtained, as well.

Key words: bioalcohol, gasoline additive, azeotropic distillation, process simulation