Patent ID: 6217782
Filing Date: 2001-04-17
Classification: B01D

Abstract:
A method for cleaning the filter surface of a filter medium in a suction drier comprising defining an area of the surface of the filter to be cleaned, separating from a space filled with slurry containing solid matter to be filtered said area of the surface of the filter to be cleaned by surrounding the area of the surface of the filter to be cleaned with a sealing surface and a movable surface of a cleaning unit to form an essentially closed cleaning space introducing cleaning liquid into the closed cleaning space so as to contact the area of the filter surface to be cleaned, applying from a location outside the space filled with slurry containing solid material to be filtered ultrasound beams on the area of the filter surface to be cleaned to effect the cleaning of the filter surface, and removing from the closed cleaning space the cleaning liquid and finely divided material from the cleaned filter surface.