Device for separating two non-mixable liquids with different...

B - Operations – Transporting – 01 – D

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Details

B01D 17/04 (2006.01) B01D 17/02 (2006.01) B01D 17/022 (2006.01) B01D 17/025 (2006.01) B01D 17/028 (2006.01) C02F 1/40 (2006.01)

Patent

CA 2331513

Device for separating two non-mixable liquids with different specific gravities such as oil and water, which device contains a first separation tank (2) with an overflow (11, 12) for each of the liquids to be separated, a coalescence filter (3) whose inlet (14) is connected via a pipe (13) to the overflow (12) of the first separation tank (2) for the liquid with the highest specific gravity and a second separation tank (4) which is connected to the outlet (19) of the coalescence filter (3), characterised in that the overflow (12) onto which the coalescence filter (3) is connected is situated higher than the inlet (14) of the coalescence filter (3) with a difference in height H1 which is such that the liquid mass in the pipe between the first separation tank (2) and the coalescence filter (3) provides for the necessary pressure to bridge the pressure drop in the coalescence filter (3) and the counterpressure of the liquid in the second separation tank (4).

Cette invention a trait à un dispositif permettant de séparer deux liquides immiscibles de densité différente, de l'huile et de l'eau par exemple. Ce dispositif, qui comprend une première cuve de séparation (2) pourvue d'un tuyau de trop-plein (11, 12) pour chaque liquide à séparer et un filtre coalescent (3) dont l'orifice d'entrée (14) est raccordé par un conduit (13) au tuyau de trop-plein (12) de la première cuve de séparation (12) prévue pour le liquide à la densité la plus élevée, comprend également une seconde cuve de séparation (4) reliée à l'orifice de sortie (19) du filtre coalescent (3). Ce dispositif se caractérise par le fait que le tuyau de trop-plein (13) auquel est relié le filtre coalescent (3) se trouve placé plus haut que l'orifice d'entrée (14) dudit filtre (3) et ce, avec une différence de hauteur H1 telle que la masse de liquide se trouvant dans le conduit entre la première cuve de séparation (2) et le filtre coalescent (3) fournit la pression nécessaire pour équilibrer la chute de la pression régnant dans le filtre coalescent (3) et la contre-pression du liquide présent dans la seconde cuve de séparation (4).

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