针对乙酸甲酯?甲醇?水体系，在筛选萃取剂的基础上，提出了双溶剂四塔萃取精馏、单溶剂三塔萃取精馏及双溶剂协同萃取精馏3种分离工艺. 用Aspen Plus软件模拟萃取精馏过程，并以能耗和年总费用作为评价指标，计算各萃取精馏工艺合适的操作参数和设备参数. 结果表明，水和乙二醇是分离该体系较合适的萃取剂，单溶剂三塔萃取精馏工艺较双溶剂四塔萃取精馏工艺优异，能耗减少约37.9%，年总费用降低约38.9%. 双溶剂协同萃取精馏工艺比双溶剂四塔萃取精馏工艺和单溶剂三塔萃取精馏工艺能耗分别减少约45.6%和12.4%，年总费用分别降低约43.5%和11.6%.

According to the characteristic of methyl acetate?methanol?water system in the presence of two kinds of azeotrope, three separation processes such as double solvent four column extractive distillation process, single solvent three column extractive distillation process and double solvent synergistic extractive distillation process were proposed on the basis of screening the extraction agent for the system. Energy consumption and total annual cost (TAC) as evaluation index, the simulations for the three separation processes were performed by Aspen Plus software which SR?Polar thermodynamic model was used to calculate phase equilibrium data and RadFrac model was used to simulate distillation column, and the optimal operating parameters and equipment parameters for the three separation processes were obtained. Simulation results showed that water and ethylene glycol were suitable extractant for the separation system, the single solvent three column extractive distillation process was better than the double solvent four column extractive distillation process and the energy consumption could be reduced by 37.9%, TAC decreased by 38.9%. Compared with the double solvent four column extractive distillation process and single solvent three column extractive distillation process, the double solvent synergistic extractive distillation process can save energy by 45.6% and 12.4%, reduce TAC by 43.5% and 11.6%, respectively.