超滤法处理回用印钞厂擦版液的研究

A study on the Ultrafiltration Process for the Treatment and Recycle of printing Banknote Effluent.

根据擦版液的特性,选择了适合处理擦版液的单皮层内压式中空纤维超滤膜,对超滤过程中的操作压力、料液温度、料液流速和固含量等工艺参数以及清洗药品和方法进行了研究。结果表明,当进口压力为0.17MPa,膜面流速在2,7m/s左右,循环液温度在40℃左右时,透水速度可达到50—60L(m.h)。操作过程中,只用透过液作简单清洗即可使透水速度得到较好的恢复。只有当透水速度衰减严重时,才在70℃条件下进行化学清洗,而且可以使透水速度得到较为彻底的恢复。化学清洗周期至少在1星期以上。

Based on the property of the banknote printing effluent studied, the polysulfone blend hollow fiber menbrane with single skin was choosen. The technical parameters of ultrafiltration,such as operating pressure,curent velocity,temperature and cleaning reagent, procedure were determined. The results show that when the process operated at an enter pressure of 0.17MPa, recycle feed temperature of about40℃ and a curent velocity of about 2. 7m/s,the flux could be 50-60L/m·h. Normally the permeate rate can be restored better only through a simple cleaning with the permeate. When the permeate rate ca was declined sianificantly, a chemical cleaning would be necessary to be taken at a temperature below 70℃. The cleaning period was at least 7 days.