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首次将超声激励技术用于膜蒸馏系统以提高蒸馏通量，并采用连续和间隙性超声激励研究超声参数对传质传热的影响并探讨其影响机理．结果表明。（１）蒸馏通量随着超声功率的增大而增加；本实验的超声激励可使蒸馏通量提高３０％；连续激励比间隙激励效果好．（２）超声空化、声学流和膜面振动改善了温度和浓度极化并清洗了膜面，这是超声激励提高蒸馏通量的主要机理，其中声学流与空化对温度和浓度极化的改善更为重要．本文还证实了文献１０提出的关于膜蒸馏通量的理论计算公式也适用于有超声激励的情况．
For the first time, the ultrasonic excitation technology was applied to the membrane distillation system to increase the distillation flux, and the effects of ultrasonic parameters on the heat and mass transfer were studied by continuous and intermittent ultrasonic excitation. The results show. (1) The distillation flux increases with the increase of ultrasonic power. The ultrasonic excitation in this experiment can increase the distillation flux by 30%. The continuous excitation is better than the gap excitation. (2) Ultrasonic cavitation, acoustic flow and membrane surface vibration improve the temperature and concentration polarization and clean the membrane surface, which is the main mechanism of ultrasonic excitation to increase the distillation flux, in which the acoustic flow and cavitation temperature and concentration polarization The improvement is even more important. This paper also confirms that the theoretical calculation formula of membrane distillation flux proposed in reference 10 is also applicable to the case of ultrasonic excitation.