Using electrical impedance tomography to interpret the filter cycle

An experimental pressure filtration rig, capable of automatic operation and data collection, has been used to acquire data for a number of filter cycles. The computer controlled apparatus uses electrical resistance measurements and suitable transducers to determine the status of a filter cake during combinations of cake formation, gas dewatering and displacement washing. The experimental arrangement is briefly described together with the principal equations of a computer simulation. Experimental data obtained for aqueous calcite suspensions are compared with the predictions made by simulation and conclusions are drawn.