【摘要】 以乙二醇作为萃取剂,选用UNIQUAC热力学模型,基于Aspen plus流程模拟软件对含异丁醇、乙醇工业废水的分离回收工艺进行设计和模拟研究。通过分析萃取剂对乙醇/水相对挥发度的影响,确定了最佳溶剂比;基于全年总费用(TAC)最低原则,确定了各塔的最优工艺操作条件;并在此条件下,得到了纯度为99.9%的异丁醇和99.8%的乙醇,废水达标排放。最后,对全流程工艺进行了模拟和经济核算,得到的TAC最低为325.88×10~3美元/a,为异丁醇/水/乙醇分离工艺工业化提供了指导性依据。更多还原

【Abstract】 Aspen plus process simulation software has been used to design and simulate the separation and recovery process of industrial wastewater containing isobutanol and ethanol using ethylene glycol as the solvent and the UNIQUAC thermodynamic model. By analyzing the influence of volatility, the optimal solvent ratio was determined. Based on the "total annual cost"(TAC) minimum principle, the optimal operating conditions for each tower were determined. Under these conditions, high purity-isobutanol(99.9 wt%) and ethanol(99.8 wt%) were obtained, and the wastewater also met emission standards. Finally, simulation and economic calculations were performed on the whole process, and the minimum TAC was found to be 325.88×10~3 US dollars. This paper provides a guiding basis for the industrialization of the separation of isobutanol/ethanol/water mixtures.更多还原