Patent ID: 8246842
Filing Date: 2012-08-21
Classification: B04B

Abstract:
1. A centrifuge comprising: a conveyor comprising a hub rotatable about an axis and a helical blade extending radially from the hub and in the axial direction of the hub; and a bowl extending about the conveyor and rotatable about the axis, the bowl comprising a cylindrical section extending from an upstream end of the conveyor and a conically diverging screen section extending to a downstream end of the conveyor, wherein the conically diverging screen section extends at an angle to the axis of the hub that reduces the coefficient of friction of the solids to a point that allows the cake formed of the solids to slide in a controlled manner forward on the conically diverging screen section with minimal back pressure but without allowing the solid cake to break loose from the conically diverging screen section and slide out of the centrifuge in an uncontrolled manner and, wherein the helical blade and all blades extending radially from the hub to the bowl terminate upstream of the conically diverging screen section.