一种新型节能回收N,N-二甲基甲酰胺的过程研究  

A new type energy-saving study on the recovery of N,N-dimethylformamide

作　　者：陈玉成[1] 杨金杯[1] 余美琼[1] 陈文韬[1] 

机构地区：[1]福建师范大学福清分校生物与化学工程系,福建福州350300

出　　处：《计算机与应用化学》2013年第2期167-170,共4页Computers and Applied Chemistry

基　　金：福建省教育厅科研资助项目(JB10202)

摘　　要：提出了从废水中回收N,N-二甲基甲酰胺(DMF)的萃取-精馏法节能新工艺,利用Aspen Plus软件对该回收过程进行了模拟计算,详细分析了各个因素对分离效果的影响,并进行能耗比较。结果表明,采用萃取-精馏分离工艺,以氯仿为萃取剂能够很好地实现DMF与水的分离,较佳的操作条件为:萃取塔理论塔板数22,溶剂比2.84,精馏塔理论塔板数18,进料位置7,回流比0.08,精馏塔塔釜DMF含量可达99.98%。与单塔精馏法、双塔精馏法、传统三塔精馏法和节能型三塔精馏法相比,节约能耗分别为78.6%、56.4%、28.8%年和30.1%,节能效果显著,为回收废水中DMF提供理论和设计依据。A new energy-saving technology to recover N,N-dimethylformamide （DMF） from the wastewater was developed by extraction anddistillation integrated system. The Aspen Plus was used to simulate the DMF recovery process, and the effect of theory stage, feed location, ratio of extractive agent and reflux ratio were detailed analyzed. The results show that the DMF can be high efficiently separated from wastewater by extraction and distillation technology with chloroform as extractive agent, the optimal condition： the number of extraction theory plates is 22, the ratio of extractive agent is 2.84, the number of distillation theory plates is 18, the feed location is at 7# plate, the reflux ratio is 0.08, and the purity of DMF product is 99.98% at the bottom of distillation tower. The extraction and distillation integrated technology can save energy consumption by 78.6%, 56.4%, 28.8% and 30.1%, compared to the single-column technology, the two-column technology, the traditonal three-column technology and the energy-saving three-column technology, thus realizing a remarkable energy-saving. The results can be provided for the design and operation of the DMF recovery.

关 键 词：N N-二甲基甲酰胺 萃取 精馏 ASPEN PLUS 节能 

分 类 号：TQ028.4[化学工程] X794[环境科学与工程—环境工程]