The binding force between water molecules and the solid skeleton of fibrous porous media, determined by the microscopic structure and chemical interactions, has a remarkable influence on the dehydration process. Therefore, the micropore structure is a key factor affecting the dewatering performance of fibrous porous media. In this paper, fibrous porous media is treated by ultrasound; then the micropore structure images are obtained. After that, structural characteristics parameters in the field of statistics and fractal theory are obtained by analysing microscopic images to investigate the effect of mechanical action and cavitation on microscopic structure under different sonication conditions. Finally, the effect of structure change on moisture removal is studied experimentally. It turns out that power and treatment times are the main factors that determine the effect of ultrasound on the pore structure of fibrous porous media. With the increase of power and time, the average pore size, the pore size with maximum ratio, the surface porosity and the surface fractal dimension increase non-linearly. Moreover, the growth is nonlinear; the maximum variation of pore structure is achieved at 530 W for 40 min. The moisture content loss rate and the effective moisture content diffusion coefficient are enhanced by the variation of micropore structure.

水分子与纤维状多孔介质的固体骨架之间的结合力，由微观结构和化学相互作用决定，对脱水过程有显着影响。因此，微孔结构是影响纤维状多孔介质脱水性能的关键因素。本文对纤维状多孔介质进行超声波处理。然后获得微孔结构图像。然后，通过分析显微图像，获得统计和分形理论领域的结构特征参数，以研究机械作用和空化对不同超声条件下微观结构的影响。最后，通过实验研究了结构变化对水分去除的影响。事实证明，功率和处理时间是决定超声对纤维状多孔介质孔结构影响的主要因素。随着功率和时间的增加，平均孔径，最大比孔径，表面孔隙率和表面分形维数呈非线性增长。而且，增长是非线性的。在530 W下持续40分钟，孔结构的最大变化。通过微孔结构的变化提高了水分损失率和有效水分扩散系数。增长是非线性的；在530 W下持续40分钟，孔结构的最大变化。通过微孔结构的变化提高了水分损失率和有效水分扩散系数。增长是非线性的；在530 W下持续40分钟，孔结构的最大变化。通过微孔结构的变化提高了水分损失率和有效水分扩散系数。