Centrifuges and methods of separating feed material

B - Operations – Transporting – 04 – B

Patent

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B04B 1/20 (2006.01) B04B 11/06 (2006.01)

Patent

CA 2480852

A centrifuge for separating feed material into solid and fluid parts, which centrifuge comprises a conveyor rotatably mounted in a rotatable housing, the conveyor having at least one impeller mounted on a nose member and the rotatable housing having a separating region comprising a pool area and a drying area between the conveyor and a rotatable housing, the arrangement being such that, in use, on entry to the centrifuge said feed material has an axial velocity substantially parallel to the longitudinal axis thereof, the feed material passing through the interior of said conveyor with rotational speed being imparted thereto by said at least one impeller prior to treatment in said separating region, said at least one impeller also imparting radial speed to said feed material whilst it moves with axial velocity such that feed material is spread onto the drying area adjacent the length of the at least one impeller, characterised in that said nose member is at least about 50% of the length of said at least one impeller.

L'invention concerne une centrifugeuse servant à séparer une matière de charge en une partie solide et une partie liquide. Cette centrifugeuse comprend un transporteur monté rotatif dans un corps rotatif, ce transporteur comportant au moins une turbine montée sur un élément en forme de nez et le corps rotatif comportant une région de séparation comprenant une zone à liquide et une zone d'essorage entre le transporteur et le corps rotatif. Cette centrifugeuse est conçue de telle sorte que lors de l'entrée de la matière de charge dans la centrifugeuse, ladite matière de charge possède une vitesse axiale sensiblement parallèle à l'axe longitudinal de la centrifugeuse, la matière de charge traversant l'intérieur du transporteur, avec une vitesse de rotation communiquée par la turbine, avant d'être traitée dans la région de séparation. La turbine communique également une vitesse radiale à la matière de charge lors de son déplacement avec une vitesse axiale de telle sorte que ladite matière soit projetée sur la zone d'essorage adjacente à la turbine dans le sens de la longueur. L'invention se caractérise en ce que l'élément en forme de nez s'étend sur au moins 50 % de la longueur de la turbine.

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