利用Aspen Plus软件，以乙二醇作为萃取剂，对隔壁塔萃取精馏工艺分离丙酸甲酯-甲醇共沸物进行了研究。以年总费用最小为目标函数对工艺流程进行优化，确定最佳工艺条件为：主塔与整流塔板数分别为43块与9块，萃取剂用量为2 000 kg/h，原料进料位置为28，萃取剂进料位置为4，回流比0.66，所得产品纯度均达到99.9%。与常规双塔流程相比，隔壁塔萃取精馏可以节约7.48%的总能耗，并且年总费用下降了2%。

Based on Aspen Plus software, the separation of methyl propionate-methanol azeotrope system by dividing wall column extractive distillation process with using ethylene glycol as extractant is simulated and studied.The minimum annual total cost is taken as the objective function to optimize the process, and the optimal process parameters are determined as follows:the theoretical plate numbers of main column is 43, the flow rate of solvent is 2, 000 kg·h^-1, methyl propionate-methanol azeotrope is fed at the 28th plate, ethylene glycol is fed at the 4th plate, the reflux ratio is 0.66, and the theoretical plate numbers of the sub column is 9.Compared with conventional process, dividing wall column extractive distillation process can save 7.48% of total energy consumption and reduce total annual cost by 2%.

张伟静(1996-),男,硕士生