采用声强测量仪测量了超声发生器的声强分布,研究了声强对板式陶瓷膜错流微滤超细TiO2悬浆液性能的影响,以优化膜组件的位置.结果表明,声强在三维空间均存在不均匀分布,且声强是影响膜微滤性能的主要因素,滤饼层质量变化率R和超声强化因子E与声强呈近似正相关关系.膜面平均声强约0.5 W·cm-2时,R超过0.23,E可达1.2左右；平均声强约0.6 W·cm-2时,R超过04,E可达1.3左右.超声与膜微滤组合的优化方式为:膜组件同向放置于换能器上方并处于声场近场区内.%Distribution of acoustic intensity in ultrasonic generator was measured by ultrasonic power measuring meter. In order to optimize the location of membrane module in ultrasonic generator, effect of acoustic intensity on cross-flow microfiltration of fine TiO2 suspension with plate ceramic membrane was investigated. The results show that the distribution of acoustic intensity in three-dimensional space of ultrasonic generator is non-uniform, and acoustic intensity influences membrane microfiltration process significantly. The acoustic intensity is positively correlated with the mass change rate of cake layer R and the ultrasonic enhancement factor E. When the average acoustic intensity on membrane surface is about 0.5 W-cm , R is higher than 0.23 and E is about 1.2, and when the average acoustic intensity on membrane surface is about 0.6 Wcm"2, R is bigger than 0.4, and E is about 1.3. The optimized location found for ultrasonic-enhanced membrane microfiltration module is as follows: the ultrasonic irradiation direction is the same as the direction of permeation flux; membrane module is placed on top of the transducer and in the near field of the ultrasonicrnfield.
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