Thickener/clarifier feedwell assembly with froth dissipation

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 21/24 (2006.01)

Patent

CA 2607372

A feedwell assembly for a thickener/clarifier including a feedwell body, at least one feed channel connected at a downstream end to the body, and a plate member disposed in the feed channel for separating froth from an incoming slurry stream to where the separated froth may be dissipated by a liquid spray directed onto the plate member. The plate member may include a planar upstream portion inclined upwardly from an upstream end of the plate member and may further include a planar downstream portion inclined downwardly from a downstream end of the upstream portion. At least one spray nozzle may be disposed above an elevated portion of the plate member so as to direct a liquid spray onto the plate member in a region about the joint, for further dissipating froth guided onto the plate member.

Ensemble de puits d'alimentation pour épaississeur/clarificateur comprenant un corps de puits d'alimentation, au moins un conduit d'alimentation relié au niveau d'une extrémité aval au corps de puits d'alimentation, et au moins une plaque placée dans le conduit d'alimentation pour séparer l'écume d'un affluent de boues de sorte que l'écume puisse être dispersée en pulvérisation liquide directement sur la plaque. La plaque peut comprendre une partie plane, en amont, inclinée vers le haut par rapport à l'extrémité de la plaque en amont, et peut aussi comporter une portion plane, en aval, inclinée vers l'aval à partir de l'extrémité de la plaque en aval de la partie en amont. Au moins une buse de pulvérisation peut être placée au-dessus d'une partie surélevée de la plaque, de manière à diriger le jet de pulvérisation liquide sur la plaque vers une région proche de la jonction, pour mieux disperser l'écume qui est guidée sur la plaque.

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