Patent ID: 6780148
Filing Date: 2004-08-24
Classification: B04B

Abstract:
A decantor type centrifugal separator which comprises a cylindrical bowl rotating in one direction and a screw conveyor that is housed in the bowl and is rotated coaxially with, in the same direction as, and with a difference in rotational speed to the bowl, and in which a heavy component is separated and sedimented by the centrifugal force from a processing liquid supplied to the interior of the rotating bowl, and accumulated on one side of the bowl by the screw conveyor, whereby the heavy component and separated liquid are separated and discharged, said centrifugal separator being characterized in that:said bowl takes the form of a horizontal type cylindrical straight drum provided with a discharge route for the heavy component that has settled down in one end wall of the bowl, an opening of the discharge route to the inside of the bowl is provided in contact with an inner peripheral wall face of the bowl, said discharge route constitutes a choke passage to limit the discharge quantity, a sedimentary lever of the heavy component in a maximum state of compaction is formed in the vicinity of said opening by the discharge resistance of the choke passage, and only the maximum compaction state part of the heavy component sedimentary layer is discharged directly, mainly by the centrifugal head pressure which acts on the sedimentation and the pressing force of said screw conveyor.