A drive device for a solid bowl screw centrifuge includes a motor for rotating a drum of the centrifuge, a transmission which is connected between the motor and the drum, and a cooling device for cooling the transmission during operation when the drum is rotating. The cooling device is an annular body which is fitted on the outside of the transmission and has an air guiding device that conducts air from farther outwards radially inwards onto a surface of the transmission.

A centrifuge basket includes a frustum-shaped hollow body defining a pair of opposed ends, being a larger end and a smaller end. The body defines an internal screening surface extending between the ends, the screening surface defining a plurality of apertures arranged to drain liquid from within the body. A plurality of ribs project into an interior of the body from the screening surface, the ribs being arranged in a plurality of annular arrays. The arrays are spaced axially along the screening surface and the ribs of at least one of the arrays are arranged transversely, at a defined included angle, relative to a generatrix line that forms a shape of the screening surface.

A decanter centrifuge includes one or more nozzles through which a slurry may be discharged from a feed chamber into a separation zone within a centrifuge bowl. A scroll conveyor may be coaxially aligned in the separation zone within the centrifuge bowl around the circumference of the feed chamber. In the separation zone, the slurry can be separated into at least a light phase and a heavy phase by centrifugal acceleration generated by rotation of the centrifuge bowl, the feed chamber, and/or the scroll conveyor. Each separated phase can discharge from the centrifuge bowl via respective discharge ports. Each nozzle may include a rectangular aperture and differentiated profiles of its leading edge and trailing edge. In some embodiments, the leading edge of the aperture comprises a rounded profile, while the trailing edge comprises an abrupt edge or a less-rounded edge.

A decanter centrifuge includes one or more nozzles through which a slurry may be discharged from a feed chamber into a separation zone within a centrifuge bowl. A scroll conveyor may be coaxially aligned in the separation zone within the centrifuge bowl around the circumference of the feed chamber. In the separation zone, the slurry can be separated into at least a light phase and a heavy phase by centrifugal acceleration generated by rotation of the centrifuge bowl, the feed chamber, and/or the scroll conveyor. Each separated phase can discharge from the centrifuge bowl via respective discharge ports. Each nozzle may include a rectangular aperture and differentiated profiles of its leading edge and trailing edge. In some embodiments, the leading edge of the aperture comprises a rounded profile, while the trailing edge comprises an abrupt edge or a less-rounded edge.

Accelerators and conveyor bodies for a decanter centrifuge are discussed. A decanter centrifuge may have a bowl forming a sedimentation chamber with a cake discharge and a centrate discharge; a screw conveyor within the sedimentation chamber, the screw conveyor having a conveyor body and a flight, the conveyor body defining a feed chamber; and an accelerator within the feed chamber for increasing the angular velocity of a feed mixture prior to entering the sedimentation chamber, the accelerator comprising an impeller with plural vanes, the plural vanes being releasably mounted to the conveyor body and sized to pass through an axial end of the conveyor body.

Accelerators and conveyor bodies for a decanter centrifuge are discussed. A decanter centrifuge may have a bowl forming a sedimentation chamber with a cake discharge and a centrate discharge; a screw conveyor within the sedimentation chamber, the screw conveyor having a conveyor body and a flight, the conveyor body defining a feed chamber; and an accelerator within the feed chamber for increasing the angular velocity of a feed mixture prior to entering the sedimentation chamber, the accelerator comprising an impeller with plural vanes, the plural vanes being releasably mounted to the conveyor body and sized to pass through an axial end of the conveyor body.

A system and method for extracting liquid and solid hydrocarbons and their derivatives from natural and man-made hydrocarbon sources, including but not limited to oil sands, bitumen, asphalt, roofing shingles, and other hydrocarbon articles of manufacture. The hydrocarbon sources are prepared by dissolving, crushing and/or grinding. The prepared hydrocarbon sources are subjected to agitation where the solvent and hydrocarbon source as thoroughly mixed. The results of the agitation are then separated in one or both of a mesh screen shaker and a centrifuge. The mesh screen shaker subjects the materials to medium frequency oscillations. The centrifuge subjects the materials to high G-forces. The combined processes separate the hydrocarbons from solids and residual solids to less than 0.2% by weight.

A system and method for extracting liquid and solid hydrocarbons and their derivatives from natural and man-made hydrocarbon sources, including but not limited to oil sands, bitumen, asphalt, roofing shingles, and other hydrocarbon articles of manufacture. The hydrocarbon sources are prepared by dissolving, crushing and/or grinding. The prepared hydrocarbon sources are subjected to agitation where the solvent and hydrocarbon source as thoroughly mixed. The results of the agitation are then separated in one or both of a mesh screen shaker and a centrifuge. The mesh screen shaker subjects the materials to medium frequency oscillations. The centrifuge subjects the materials to high G-forces. The combined processes separate the hydrocarbons from solids and residual solids to less than 0.2% by weight.

A solid-bowl centrifuge screw is provided and has a screw flight with a profiled flight cross-sectional area. The screw flight has plural layers applied sequentially by build-up welding.

A solid-bowl centrifuge screw is provided and has a screw flight with a profiled flight cross-sectional area. The screw flight has plural layers applied sequentially by build-up welding.