Rotating radial screen filter

Details Rotating radial screen filter Rotating radial screen filter

B - Operations, Transporting

01

D

182/32

B01D 33/06 (2006.01) B01D 33/11 (2006.01) B01D 33/25 (2006.01) B04B 3/00 (2006.01)

Patent

CA 1048419

Abstract of the Disclosure A method and apparatus is provided for separating a carrier fluid from particles held in suspension in the fluid and which are of greater density than the fluid. The apparatus includes a rotatably mounted frame and a screen mounted on the frame and extending in a largely radial direction from the axis of rotation of the frame. A feed conduit feeds fluid with sus- pended particles therein along a first face of the screen, while a filtrate conduit carries away fluid which passes through the screen and a concentrate conduit carries away fluid with a high concentration of particles therein which has passed across the first face of the screen without passing through the screen. The frame is rapidly rotated so that a large centrifugal force is applied to the fluid and particles therein as it moves along the screen. The centrifugal force urges the particles to settle out of the fluid in a radially outward direction, so that the major force on the particles urges them radially outwardly rather than through the screen. Even particles much smaller than the holes in the screen tend to precipitate outwardly rather than flowing through the screen, and there is a minimal buildup of large particles on the screen that would tend to block it and reduce the flow rate. The combination of a centrifuge action that urges particles radially outwardly together with the use of a screen that is oriented primarily perpendicular to radially outward flow results in a greater flow of filtered fluid than has been possible using either centrifuge separation or screening through a stationary or only slowly moving screen.

279746

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