针对传统的DMF回收工艺存在能耗高的问题，提出了双效提浓工艺流程。利用Aspen Plus化工软件进行模拟，选用NRTL热力学模型，分别研究了3种不同进料浓度相对应的提浓度对节能效果的影响。以年总费用最低为目标函数，模拟了双效提浓、双效提浓热集成和双效提浓MVR热泵工艺并确定最佳工艺条件。研究结果表明，处理浓度分别为10%、20%、50%的DMF废水时，最佳的提浓度分别为60%、60%、70%；与常规精馏相比，双效提浓热集成工艺的TAC分别降低了7.35%、12.91%、6.01%；双效提浓热泵工艺的TAC分别降低62.25%、65.62%、41.27%。

To solve the problem of high energy consumption in traditional DMF recovery process,the double-effect concentrating process is proposed.The influences of concentrating for three different feed DMF concentrations on the energy conservation effect are studied through simulation by Aspen Plus based on the NRTL thermodynamic model.With the minimum annual total cost (TAC) as objective function,the optimal energy conservation process conditions are determined by simulating three processes such as double-effect concentrating,double-effect concentrating plus heat integration and double-effect concentrating plus MVR heat pump distillations.The results show that when the wastewater with DMF contents of 10%,20% and 50%,the optimal concentrating targets are 60%,60% and 70% correspondingly.Comparing with the conventional distillation,the TAC for double-effect concentrating plus heat integration process decreases by 7.35%,12.91% and 6.01% respectively upon three DMF contents,that of double-effect concentrating plus MVR heat pump process can save TAC by 62.25%,65.62% and 41.27% respectively.