合成革生产废水中DMF的节能回收新工艺

化工进展

合成革生产废水中DMF的节能回收新工艺

赵舜华，宋锡瑾，张景铸，刘书庆，裴宁

浙江禾欣实业集团股份有限公司；浙江大学化学工程与生物工程系；烟台东洁环保机械工程有限公司

出版日期:2007-09-25 发布日期:2007-09-25

Energy-saving recovery process of DMF from synthetic leather waster water

ZHAO Shunhua，SONG Xijin，ZHANG Jingzhu，LIU Shuqin，PEI Ning

Zhejiang Hexin Industry Group Co.; Department of Chemical & Biochemical Engineering，Zhejiang University;Yantai Dongjie Environmental Protection Machine Engineering Co

Online:2007-09-25 Published:2007-09-25

摘要/Abstract

摘要： 提出了从聚氨酯合成革生产废水中回收N，N-二甲基甲酰胺的节能新工艺。该工艺充分利用现有的低压蒸汽为热媒，在现有双塔回收工艺的基础上进行改进，由一级减压浓缩、二级常压浓缩、减压精馏三塔组成，热能循环使用，比现有双塔回收装置综合能耗下降37.7％，废水可以达到零排放，所得DMF 产品的纯度99%以上。该工艺运行稳定，每套装置年收益达496.19万元。

Abstract: A new three-column energy-saving technique to recover N,N-dimethylformamide（DMF）from the polyurethane（PU）synthetic leather process was developed by rebuilding a two-column recovery system. This process was composed of three columns，including first-stage vacuum concentration，second-stage atmospheric concentration，and vacuum distillation. Because heat energy was reused，the energy-saving recovery equipment could reduce energy consumption by 37.7%，compared to the current two-column equipment. No waster water was discharged in the process，and the purity of DMF product was above 99%. The profit of each energy-saving unitt could reach 4 961 900 yuan each year .

赵舜华，宋锡瑾，张景铸，刘书庆，裴宁. 合成革生产废水中DMF的节能回收新工艺 [J]. 化工进展.

ZHAO Shunhua，SONG Xijin，ZHANG Jingzhu，LIU Shuqin，PEI Ning. Energy-saving recovery process of DMF from synthetic leather waster water[J]. Chemical Industry and Engineering Progree.