Abstract: 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.
高晓新, 朱碧云, 顾强, 林方毅, 朱峰, 杨德明. 基于双效提浓的DMF废水分离节能研究[J]. 现代化工, 2017, 37(10): 159-162.
GAO Xiao-xin, ZHU Bi-yun, GU Qiang, LIN Fang-yi, ZHU Feng, YANG De-ming. Energy conservation research on separation of DMF containing wastewater based on double-effect concentrating. Modern Chemical Industry, 2017, 37(10): 159-162.