均质滤料过滤截污模型研究

对均质滤料过滤进行了分析，采用毛细管模型研究过滤水流，给出毛细管中剪切应力的分布，通过毛细管中颗粒物的受力分析，求得颗粒与毛细管壁间的物理化学作用力。对颗粒在毛细管在毛细管中运动的受力平衡进行分析简化，得到了截污饮和时滤床中孔隙率的计算公式，由此可以计算出均质滤床的最大截污能力，即：清洁滤床的孔隙率与孢和孔隙率之差乘以滤床的体积。

Study on the uniform media filtration model calculation

Through analyzing the uniform media filtration, the capillary model was used to determine the flow pattern in the packed bed, and then the fluid shear force distribution in the capillary was presented. The physical-chemical forces between a particle and the capillary wall were calculated by analytical equations. By equilibrium analysis of the forces acting on a particle adhered on the capillary wall and appropriate simplification, the analytical equation of the porosity in the saturated filter bed was obtained, from which the maximum entrapment capacity during the filtration process was achieved. Moreover, the filtration capacity under certain operations were also presented and discussed.