Study on the Limit of Water Content by Cake Filtration and Effective Operation in Filtration-Expression Process

摘要

The definition of cake is not established for cake filtration,and especially the definition was impossible for the filtration of the floc already sedimented.The definition is proposed with the experimental method named'filtration-permeation'.The limit of water content which can be achieved with cake filtration of floc was established with the definition of cake.The expression operation of which the purpose is to reduce the water content of pre-formed filter cake is calculated with our'unified theory on solid-liquid separation'and compared with the experimental results.The importance of expression is analyzed by the calculated whole procedure of cake filtration and expression.The method determining the most effective operational conditions of filter press including the cake discharge and washing time is proposed.