Cyclofil (proprietary) Limited

Gideon J Du Toit

Pierre De Villiers

A hydro-cyclone includes a hollow round casing having, co-axially in series, a cylindrical portion and a frusto-conical portion tapering toward one end of the cyclone. An end plate closes off the cylindrical portion opposed to the taper end. A tangential inlet conducts a fluid flow stream to be classified tangentially into the cylindrical portion. A co-axial, heavy fraction outlet is provided at the taper end. A co-axial, light fraction outlet is provided through the end plate, preferably via a porthole in the cylindrical portion axially spaced from the end plate. The invention provides for drawing-off of fluid flowing from the inlet inwardly in a boundary layer adjacent the end plate via a circulation outlet in the end plate, preferably annularly around the light fraction outlet.

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Hartbeespoort, South Africa

Gideon J Du Toit