HYDRODYNAMIC ANALYSIS ON THE MECHANISM OF CROSS-FLOW FILTRATION OF POWER-LAW SLURRY

The mechanism of cross-now filtration of power law slurry is studied t hrough a hydrodynamic approach. The trajectories of particles in the f iltration are analyzed in order to estimate the mass flux of particle deposition on the filter septum. An agreed tendency is found between t he calculated results of particle flux and the experimental data. A dy namic simulation method based upon the continuity equation of cake com pression and the differential-form filtration equation of power law sl urry is proposed. By substituting a set of experimental data of filtra tion rate vs. time into the iteration procedures, the local cake prope rties and their variations during a course of cross-flow filtration ca n be simulated. The calculated results of average cake porosity and av erage specific filtration resistance agree very well with the experime ntal data.