超声在陶瓷膜过滤氧化铝悬浮体系中的应用  

Effect of ultrasound on the ceramic membrane filtration of alumina suspensions

作　　者：舒莉[1] 邢卫红[1] 

机构地区：[1]南京工业大学膜科学技术研究所,材料化学工程国家重点实验室,南京210009

出　　处：《膜科学与技术》2009年第5期6-11,共6页Membrane Science and Technology

基　　金：国家973计划资助(2003CB615707);国家自然科学基金重点项目(20436030)

摘　　要：超声技术可有助于控制膜污染的形成,采用超声波辅助陶瓷膜过滤氧化铝悬浮液体系,考察超声在不同颗粒的粒径、浓度以及膜过滤操作压力下对膜过程的影响规律,以及超声功率、超声方式等对膜过滤过程的影响;分析了超声波对强化颗粒体系过滤的机理.结果表明,超声可使陶瓷膜微滤通量提高10%左右,且对粒径大的颗粒体系影响增大;合适的超声功率为8 W,连续超声对通量的提高率大于间歇超声.Ultrasonic technology may be helpful to the membrane fouling control. In this study, the ultrasonic assisted technique was adopted to the ceramic membrane filtration system of aluminum oxide suspension. The in- fluences of several factors on the membrane filtration process were investigated, such as the particle size, concen- tration, membrane operation pressure, as well as ultrasonic power and mode. Also the primary intensification mechanism of ultrasound on the suspension system was analyzed. The results show that the ultrasound may en- hanced the flux by about 10 %, and the relative permeate flux improvement is higher in the suspension system with larger size particles and lower particle concentrations. The optimum ultrasonic power is 8 W, and the per- meate flux enhancement ratio under the condition of continuous ultrasonic working is higher than the batch mode

关 键 词：超声 陶瓷膜 颗粒 

分 类 号：X703[环境科学与工程—环境工程]