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.
出处
《化工环保》
CAS
CSCD
北大核心
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)
关键词
N
N-二甲基甲酰胺
聚氨酯
合成革
湿法
回收
N, N-dimethylformamide
polyurethane
synthetic leather
wet process
recovery
