A plant for purifying water contaminated by droplets of...

C - Chemistry – Metallurgy – 02 – F

Patent

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Details

C02F 1/40 (2006.01) B01D 17/00 (2006.01) C02F 1/24 (2006.01) C02F 1/28 (2006.01)

Patent

CA 2417965

In a plant for purifying water contaminated by droplets of hydrocarbonaceous liquid, which plant has an essentially vertically positioned filter (4); an inlet chamber (7) for said contaminated water partially defined by a first vertical surface (5) of said filter; supply means (8) for contaminated water debouching in the lower portion of said inlet chamber (7); and outlet means (9) connected to the upper portion of said inlet chamber (7) for discharging hydrocarbonaceous liquid separated from the water in said inlet chamber; the operational period between filter cleaning and/or the hourly capacity of the filter is increased by injecting fine gas bubbles into the contaminated water at at least one location selected from locations in the lower portion of said inlet chamber (7) and locations in said supply means (8) to produce a stream of gas bubbles upwards along said first vertical filter surface (5).

L'invention concerne un équipement de purification d'eau contaminée par des goulettes de liquide hydrocarboné, lequel présente un filtre positionné d'une manière sensiblement verticale (4); une chambre d'admission (7) destinée à l'eau contaminée et définie par une première surface verticale (5) du filtre; des moyens d'alimentation (8) destinés à l'eau contaminée et débouchant dans la partie inférieure de la chambre d'admission (7); et des moyens d'évacuation (9) reliés à la partie supérieure de la chambre d'admission (7) et destinés à évacuer le liquide hydrocarboné séparé de l'eau dans la chambre d'admission. Dans un tel équipement, la durée de fonctionnement entre le nettoyage du filtre et/ou la capacité en heures du filtre sont accrues par l'injection de fines bulles de gaz dans l'eau contaminée au niveau d'au moins un emplacement sélectionné parmi des emplacements situés dans la partie inférieure de la chambre d'admission (7) et des emplacements situés dans les moyens d'alimentation (8), de manière à produire un courant de bulles de gaz vers le haut le long de la première surface verticale du filtre (5).

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