陶瓷膜污染的超声波辅助清洗  

Ultrasound-assisted cleaning of ceramic membrane

作　　者：舒莉[1] 吴波[1] 邢卫红[1] 徐南平[1] 

机构地区：[1]南京工业大学膜科学技术研究所省部共建材料化学工程教育部重点实验室,江苏南京210009

出　　处：《化工进展》2006年第10期1184-1187,共4页Chemical Industry and Engineering Progress

基　　金：国家973项目(No.2003CB615707);国家自然科学基金重点项目(No.20436030)

摘　　要：膜污染的控制和膜的清洗再生是膜应用的关键,研究了采用超声波辅助清洗被乳化液污染的氧化锆陶瓷膜。结果表明:超声波的功率、超声清洗时间及膜污染程度等对清洗效果均有影响,超声功率越高,清洗后水通量的恢复率越高,超声清洗时间在20min左右比较适宜。超声波对膜表面的污染清洗效果较好,对膜孔内堵塞清洗效果相对较弱,超声辅助化学清洗可有效恢复膜通量。The technology for membrane fouling control and flux recovery is the key issue to improve the separation properties of the ceramic membrane and it can bring forth great economic benefits. Ultrasound cleaning technique was applied to the removal of fouling of ZrO2 ceramic microfiltration membrane, which was used to treat emulsification wastewater. The results showed that the effects of membrane cleaning were influenced by ultrasonic power, cleaning time and the level of membrane fouling. The flux recovery rate was increased by enhancing ultrasonic power provided condition that it was safe for the ceramic membrane. The suitable cleaning time was about 20 minutes. The water cleaning assisted with ultrasound was proved to be an effective way to clean membrane surface fouling which came from concentration polarization and gel layer on the membrane surface, but was less effective for membrane pore blocking. The chemical cleaning assisted with ultrasound could recover membrane flux effectively and shorten cleaning time.

关 键 词：超声 膜污染 清洗 

分 类 号：TQ028.8[化学工程]