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为探讨超声场强化化工分离过程的机理 ,以充满电解质溶液的短毛细管中溶质的浸出模拟固液分离体系 ,通过测定浸出动力学曲线 ,探讨了超声场对这一浸取过程的强化作用机理 ,分析了微扰效应对传质过程的影响。实验结果表明 ,超声空化的微扰效应强化了溶质在毛细管内部的扩散 ,且强化作用随毛细管径及超声场强的增大而增大。与升温的强化效果相比较 ,超声场的微扰效应和湍动效应兼顾了强化内外扩散的两个方面 ,与升温浸取过程相比 ,超声场的强化手段更具优势
In order to investigate the mechanism of ultrasonic field enhanced chemical separation process, the leaching kinetics curves of simulated solid-liquid separation system with solute leaching in short capillaries filled with electrolyte solution were used to investigate the mechanism of enhancement effect of ultrasonic field on this leaching process. The effect of perturbation on the mass transfer process is analyzed. The experimental results show that the perturbation effect of ultrasonic cavitation strengthens the diffusion of solute inside the capillary, and the strengthening effect increases with the increase of capillary diameter and the intensity of ultrasonic field. Compared with the enhancement effect of temperature increase, the perturbation effect and turbulence effect in the ultrasound field take into account the two aspects of strengthening the internal and external diffusion. Compared with the heating and leaching process, the enhancement of the ultrasonic field is more advantageous