Alfa Laval Corporate Ab

Alfa Laval Copenhagen A/s

Klaus Dircks

Bent Madsen

A centrifugal separator comprises a bowl rotating in use around an axis of rotation. The axis of rotation extends in a longitudinal direction, and a radial direction extends perpendicular to the longitudinal direction. A base plate provided at one longitudinal end of the bowl, said base plate having an internal and external side, an outlet opening being provided in the base plate. A casing is projecting at the outlet opening on the external side of said base plate, said casing comprising a casing side, a normal to said casing side extending at an acute angle relative to a circumferential direction of the bowl at said casing and a discharge opening is provided in said casing side. The discharge opening is radially outwardly limited by a weir with an overflow edge and said discharge opening extending radially inwardly to a position above a highest intended level of liquid in the bowl.

Centrifugal separator and a liquid phase discharge port member

The decanter centrifuge comprises a screw conveyor having a body (), which carries a screw comprising one or more flights (') and having a nominal transport speed varying along the longitudinal axis. An inlet () is provided in the screw conveyor for the material to be separated. The screw conveyor is provided with a baffle (&#x2032;) dividing the separation chamber in a substantially cylindrical separation part () and an at least partially conical discharge part (). Immediately upstream of the baffle (&#x2032;) a transition part () is provided between the separation part () and the discharge part (), the screw conveyor () having a bigger nominal transport speed in the transition part () than in the separation part () immediately before the transition part (), the change of the nominal transport speed being established by a change () of the screw pitch.

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Copenhagen, Denmark

Klaus Dircks