利用化工模拟软件对隔壁萃取精馏分离醋酸乙烯-甲醇共沸物进行优化。采用全局经济优化法，模拟优化后隔壁萃取精馏塔的设计参数为：主塔塔板数51块，萃取剂进料位置为第2块，进料流率30 150 kg/h，萃取剂流率17 810 kg/h，混合物进料位置为第18块，回流比0.22；侧线精馏塔塔板数30，侧线气相采出位置为第43块，采出量16 325 kg/h，回流比1.0。与普通连续萃取精馏比较，每年节省总能耗46.8%，节省总费用1 179.7万元。

The separation of vinyl acetate-methanol azeotrope by dividing wall extractive distillation column is optimized by chemical simulation software and overall economic optimization method.After simulation and optimization,the design parameters for dividing wall extractive distillation column are determined as follows.As for the main column,the number of plate is 51,the extraction agent is fed at the second plate,the feeding flow rate is 30 150 kg·h^-1,the flow rate of extraction agent is 17 800 kg·h^-1,the feed position of azeotrope is at the 18th plate and the reflux ratio is 0.22;As for the side column,the number of plate is 30,gas phase extraction position is at the 43rd plate,the flow rate of extracted gas phase is 16,325 kg/h and the reflux ratio is 1.0.Compared with ordinary continuous extractive distillation process,this process can save total energy consumption by 46.8% and total cost by RMB 11.797 million per year.