合成革生产废水中DMF的节能回收新工艺  

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

作　　者：赵舜华 宋锡瑾[2] 张景铸 刘书庆 裴宁[2] 

机构地区：[1]浙江禾欣实业集团股份有限公司,浙江嘉兴314003 [2]浙江大学化学工程与生物工程系,浙江杭州310027 [3]烟台东洁环保机械工程有限公司,山东烟台264002

出　　处：《化工进展》2007年第9期1347-1350,共4页Chemical Industry and Engineering Progress

基　　金：浙江省科技厅重大科技专项(2006C13072)

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。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.

关 键 词：N N-二甲基甲酰胺 PU革 回收 节能 

分 类 号：TQ028[化学工程] TQ021