Patent ID: 6311905
Filing Date: 2001-11-06
Classification: B01D,B02C,B07B

Abstract:
An apparatus for screening and recirculating solid material contained in a fluid flow, said apparatus comprising:(a) a stationary sizing screen member having a semi-cylindrical-like screening surface with a plurality of openings for sizing material particles and being disposable in the path of the fluid flow containing material particles and extending to the full width and depth thereof, wherein larger solid material particles intercepted are cleared and removed from the screening surface and are recirculated into the path of the flow for subsequent sizing;(b) a combined unit of a comminuting grinder having twin rotary shafts and a sweeper, the unit being associated with and disposed directly in front of the screen in fixed space relationship for removing and sweeping the intercepted solid material particles from the screening surface, wherein the combined unit completes a multiple sweeping cycle of motion parallel along the screening surface; and(c) drive means connected to the sweeper unit for providing rotary motion to the shafts of the comminuting grinder and arcuate sweeping action to the combined unit along the screening surface.