Patent ID: 10058876

Abstract:
A decanter centrifuge with a rotating bowl is provided with at least one solids discharge port and at least one clarified liquid discharge port and a screw conveyor disposed coaxially within the rotating bowl to be rotated in the same direction with a differential rotational speed. A feed suspension to be separated is introduced into a ring shaped space formed between the rotating bowl and the screw conveyor through a central feed pipe fixed to the end of the screw conveyor and supported in at least one bearing. The feed suspension is separated by centrifugal force into a solid phase and a liquid phase so that the solid phase is discharged from the solid discharge port and the liquid phase is discharged from a clarified liquid discharging apparatus. A sealing of the feed pipe and the bowl shaft at the feed end of the feed pipe is provided as adjacent double axial sealing. A liquid phase conduit is arranged in the bowl shaft for guiding the liquid phase outside of the bearings, and a liquid phase valve is provided outside the bearing on the side facing away from the bowl and screw. In this way the liquid phase discharge valve can be varied during operation of the decanter centrifuge by a hand wheel via a transmission or by a motor.