C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/24 (2006.01) B01D 21/04 (2006.01) B03D 1/14 (2006.01) B03D 3/02 (2006.01) C02F 1/52 (2006.01)
Patent
CA 2478282
The invention relates to a method for clarification by flotation of water loaded with material in suspension, characterised in that the clarification treatment is carried out in two successive stages in a single plant. The method comprises a static flocculation step with descending current, integrated with a primary separation step for the heaviest particles, the zone in which the primary separation of the heaviest particles occurs being situated beneath the zone in which the static flocculation step is carried out and comprises a removal of the heaviest particles and a flotation step which guarantees the removal of the light particles, the decantation speed of which is below the threshold for cleaving the flotation agent.
Procédé de clarification par flottation des eaux chargées en matières en suspension, caractérisé en ce que le traitement de clarification s'effectue en deux étapes successives mises en oeuvre dans une seule installation :- une étape de floculation statique ô courant descendant, ô laquelle est intégrée une étape de séparation primaire des particules les plus lourdes, la zone dans laquelle s'effectue l'étape de séparation primaire des particules les plus lourdes étant située sous la zone dans laquelle est mise en oeuvre l'étape de floculation statique et comportant une évacuation des particules les plus lourdes et- une étape de flottation assurant l'élimination des particules légères dont la vitesse de décantation est inférieure au seuil de coupure du flottateur.
Degremont
Goudreau Gage Dubuc
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