DYNAMIC ANALYSIS ON CONSTANT-PRESSURE FILTRATION OF POWER-LAW SLURRY

The mechanism of cake formation in constant pressure filtration of pow er law slurry is studied, By analyzing the forces exerted on the depos iting particles, the critial friction angles, theta(c), are estimated under various conditions, The lowest value of theta(c) is found when t he frictional drag and the interparticle force are of the same order o f magnitude, The packing structure of particles on the cake surface ha s been simulated, and the results indicate that a more compact cake wi ll be obtaind if a power law slurry with smaller n is filtered, A nume rical program besed upon the continuity equation and the Rabinowitsch. Mooney equation is also designed to estimate the variations of local c ake properties during a course of constant pressure filtration, The ca lculated results of cake porosity and specific filration resistance ag ree very well with the experimental data.