聚氨酯合成革生产中 N,N-二甲基甲酰胺的回收利用  

Recovery of N,N-dimethylformamide in Polyurethane Synthetic Leather Production

作　　者：赵舜华 宋锡瑾[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

出　　处：《化工环保》2008年第5期443-446,共4页Environmental Protection of Chemical Industry

基　　金：浙江省科技厅重大科技专项基金资助项目(2006C13072)

摘　　要：采用自行设计的收集、吸收方法回收湿法聚氨酯(PU)合成革生产废气中的 N,N-二甲基甲酰胺(DMF),废气由集气罩收集,经填料吸收塔被水吸收后,出口废气中 DMF 质量浓度小于14.5 mg/m^3,远低于国家标准40 mg/m^3的排放要求,整个吸收塔 DMF 的吸收率达95%。采用自主开发的节能型三塔工艺回收废水中的 DMF,废水处理能力达13.8 t/h,DMF 回收率达99%以上,回收的 DMF 纯度为99.95%。以3条湿法 PU 合成革生产线计,采用节能型三塔回收工艺,预计每年可增加效益354.3万元。The waste gas in wet process polyurethane （PU）synthetic leather production, which contains N, N-dimethylformamide （DMF）, was treated by the self-designed collection-water absorption process. The mass concentration of DMF in treated waste gas is less than 14.5 mg/m^3 , which can meet the national emission standard of 40 mg/m^3. the wastewater was recovered by the self-designed The absorption rate of DMF is 95 %. The DMF in energy-saving three-tower recovering process. The wastewater treatment capacity of the process is 13.8 t/h. DMF recovery rate is over 99%. The purity of recovered DMF is 99.95 %. Calculated according to three wet process production lines, the benefit of the energy-saving three-tower recovering process is 3543,000 yuan/a.

关 键 词：N N-二甲基甲酰胺 聚氨酯 合成革 湿法 回收 

分 类 号：X78[环境科学与工程—环境工程] TQ028[化学工程]