Patent ID: 6351895
Filing Date: 2002-03-05
Classification: B01D

Abstract:
A method for making drying of finely divided materials more effective, in which method a filter cake made of a slurry containing liquid and finely divided solids is formed on a substantially planar surface of a filter medium by suction, the filter cake having substantially planar outer and inner surfaces, said inner surface being in contact with an outer surface of the filter medium, the method comprising placing the outer surface of the filter cake and a substantially planar outer surface of an oscillator in a mechanical contact with each other, so that an acoustic field, having an oscillation frequency is generated throughout the filter cake, wherein the entire outer surface of said oscillator is in substantially continuous contact with said outer surface of said filter cake when said acoustic field is generated; and removing residual liquid in the filter cake which is difficult to remove by said suction alone by applying the acoustic field to the outer surface of said filter cake.