利用Aspen Plus软件中的UNIQUAC模型，针对乙酸酯化法产生的废水中乙酸乙酯(EA)以及乙醇(ET)的回收利用问题，选择乙二醇(EG)作为萃取剂来分离EA、ET和水。综合考虑了该工艺中的分离效果和精馏塔热负荷2个指标，利用灵敏度分析工具对理论板数、进料位置、回流比等参数进行优化，以谋求达到预期分离效果的前提下精馏操作的最低能耗。模拟结果显示乙酸乙酯回收塔最佳操作条件为：理论板数为25块，摩尔回流比为2,物料进料位置为第20块板，萃取剂进料位置为第2块板。按照相同方法优化其他各塔，优化后的流程可得到乙酸乙酯纯度为99.94%,乙醇纯度为99.12%,废水中各有机物含量均少于50ppm,满足了分离设计的要求。该模拟可指导乙酸酯化法中含EA、ET废水回收工段的设计运行，减少废液处理费用。

Using the UNIQUAC model in Aspen Plus software, ethylene glycol(EG) was selected as the extractant to separate ethyl acetate(EA), ethanol(ET) and water for the recycling of EA and ET in the wastewater generated by the acetate esterification method. The separation effect and the heat load of the distillation column in the process were considered as two indicators, and the parameters such as the theoretical plate number, the feed position, and the reflux ratio were optimized by using the sensitivity analysis tool to seek the lowest energy consumption of the distillation operation under the premise of achieving the expected separation effect. The simulation results show that the optimal operating conditions of the EA recovery tower are as follows: the number of theoretical plates of 25, the molar reflux ratio of 2, the 20th plate of the waste liquid feeding location, the 2nd plate of the extractant feeding location. Optimising the other towers following the same methodology, the optimized process yields a purity of 99.9 4% for EA and 99.12% for ET, and the content of each organic substance in the wastewater is less than 50 ppm, which meets the requirements of the separation design. The simulation can guide the design and operation of the EA-and ET-containing wastewater recycling section in the acetate esterification process and reduce the cost of wastewater treatment.