Importance

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Abstract

A method and apparatus for separating suspended solid particles and/or fluid droplets from a body of liquid is described. Fluid is caused to flow through at least one helical flow path defined between axially facing surfaces of a number of conical helical plates. Preferably, a substantially vertical flow channel of circular cross-section has disposed therein at least one conical helical plate with a diameter substantially equal to that of the flow channel. The conical helical plate or plates are arranged coaxially in the flow channel and define at least one helical flow path coaxial with the flow channel between axially facing surfaces of the plate or plates. The plate or plates are preferably capable of rotating about the axis of the flow channel, and may be driven. While they may be driven at a greater or lesser speed, they are preferably driven at a speed so as to approximately correspond with the flow rate of the liquid.

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First Claim