Abstract: A centrifugal separator for separating solid particles from a liquid mixture includes a rotor body. The rotor body has a separation chamber with an inlet for the liquid mixture, one or more liquid outlets for a liquid separated from the liquid mixture, a sludge outlet for the separated solid particles, a screw conveyor adapted to rotate in the rotor body, at a speed differing from the rotational speed of the rotor body, for transporting the separated solid particles in the separation chamber towards and out of the sludge outlet, a drive arrangement adapted to rotate the rotor body and the screw conveyor at their respective speeds, and a control unit which is adapted to control the drive arrangement to rotate the rotor body at a first speed during a separation phase and at a second speed, which is lower than the first speed, during a particle discharge phase.

Abstract: The present invention relates to a centrifugal separator for separating solid particles from a liquid mixture, said centrifugal separator comprising a rotor body which is rotatable around an axis of rotation, the rotor body having a separation chamber with an inlet for the liquid mixture, at least one liquid outlet for a separated liquid from the liquid mixture, a sludge outlet for the separated solid particles, a screw conveyor adapted to rotate in the rotor body around the axis of rotation, at a speed differing from the rotational speed of the rotor body, for transporting the separated solid particles in the separation chamber towards and out of the sludge outlet, a drive arrangement adapted to rotate the rotor body and the screw conveyor at their respective speeds, and a control unit which is adapted to control the drive arrangement to rotate the rotor body at a first speed during a separation phase and at a second speed, which is lower than the first speed, during a particle discharge phase.

Abstract: A screw conveyor intended and formed for use in a decanter centrifuge for separation of solid particles from a fluid compound, comprising a central body, at least one conveyor thread and at least one baffle bridging a flow path formed between different parts of the conveyor thread. The screw conveyor has at least two originally separate parts, each of which comprises a portion of said conveyor thread and which are kept together axially. The baffle constitutes a separate member arranged to be kept in place between said parts of the screw conveyor, when these parts are kept together axially, and has a portion which forms a part of the conveyor thread in an area where the conveyor thread intersects with and extends past the baffle.

Abstract: A screw conveyor intended and formed for use in a decanter centrifuge for separation of solid particles from a fluid compound, comprising a central body, at least one conveyor thread and at least one baffle bridging a flow path formed between different parts of the conveyor thread. The screw conveyor has at least two originally separate parts, each of which comprises a portion of said conveyor thread and which are kept together axially. The baffle constitutes a separate member arranged to be kept in place between said parts of the screw conveyor, when these parts are kept together axially, and has a portion which forms a part of the conveyor thread in an area where the conveyor thread intersects with and extends past the baffle.