Patent ID: 6024686
Filing Date: 2000-02-15
Classification: B04B

Abstract:
A decanter centrifuge for separation of a material supplied thereto into a light phase and a heavy phase, comprisingan elongated bowl (2) adapted for rotation about its longitudinal axis,a screw conveyor (3) arranged in the bowl and coaxial therewith and comprising a body (4) carrying a screw (7), inlet ports (6) in the screw conveyor for supply of the material to be separated, and discharge ports (14) for the heavy phase in the bowl at one end of the conveyor, the screw conveyor being adapted to rotate in relation to the bowl for transporting the heavy phase towards the discharge ports for the heavy phase, anda baffle (8) which is arranged between the inlet ports and the discharge ports and the radial extent of which in any axial position is smaller than the radial extent of the screw in the same axial position, the baffle extending from a position on the side of a flight of the screw (7) of the conveyer (3) facing towards the discharge ports (14) to a position on the side facing away from the discharge ports of one of the flights of the conveyor screw following in the direction towards the discharge ports, without intersecting an intermediate flight, and the baffle having a periphery describing, during rotation of the screw conveyor, an enveloping surface of the baffle,wherein the baffle (8a) takes the form of a helical rib having the same hand as the screw conveyor (3).