隔膜压滤机滤室最优空腔厚度

利用UG软件对隔膜压滤机滤室内流体进行三维建模,导入Gambit中进行网格划分及边界条件的设定,结合Fluent选用RNG k-ε湍流模型,采用多孔介质模型模拟隔膜压滤机滤室内固-液两相流分离,得到不同空腔厚度下滤室内流体的体积分数轮廓图、压强云图,得出滤饼含水率与空腔厚度大小的关系。实验结果表明,模拟和实验结果具有较好的一致性。在压滤机滤室空腔厚度为12 mm时,滤饼含水率为48%,每天污泥处理量为102 t,隔膜压滤机工作效率最高。

Optimization thickness on filter chamber cavity of membrane filter press

The three dimensional model of the fluid in the filter chamber of membrane filter press, established via UG, was combined with Gambit to mark out the grid and set its boundary conditions. Then with the RNG k-ε turbulence model of Fluent, through Porous Media, the solid-liquid biphasic flow field in the membrane filter press was simulated, which reveals the relationship between the filter cake's water content and cavity thickness. Moreover, the contour graph of volume fraction as well as the pressure nephogram on the part of the fluid in the filter chamber with different cavity thickness were also drawn accordingly. The experiments' results are largely consistent with those of the simulations. Both experiments and simulations prove that when the thickness of filter chamber cavity is 12 mm, the water content of the filter cake is 48%, daily capacity of sludge treatment is 102 t, and the membrane filter press is most efficient.