Bubble generation for aeration and other purposes

B - Operations – Transporting – 01 – F

Patent

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Details

B01F 3/04 (2006.01) B01F 15/02 (2006.01) F15B 21/12 (2006.01)

Patent

CA 2667840

A method of producing small bubbles (90) of gas in a liquid comprises a source (16) of the gas under pressure, a conduit (64a) opening into a liquid and oscillating the gas passing along the conduit at a frequency between 1 and 100 Hz. The oscillation is effected by fluidic oscillator (10) comprising a diverter that divides the supply into respect outputs (A, B), each output being controlled by a control port, wherein the control ports are interconnected by a closed loop (22). There may be at least two of said conduits (62a, 64a), each output port being connected to one or the other of said conduits, in which one phase of the oscillating gas is employed to drive liquid across the conduit (64a) after formation of a bubble in the other phase of oscillation, whereby the bubble is detached by the force of said driven liquid.

L'invention concerne un procédé permettant de produire de petites bulles (90) de gaz dans un liquide. Le dispositif selon l'invention comprend une source (16) de gaz sous pression, une conduite (64a) débouchant dans un liquide et la mise en oscillation du gaz circulant dans la conduite à une fréquence comprise entre 1 et 100 Hz. Le mouvement oscillatoire est imprimé par un oscillateur fluidique (10) comprenant une unité de déviation qui divise l'alimentation en sorties respectives (A, B). Chaque sortie est commandée par un port de commande, les ports de commande étant interconnectés par une boucle fermée (22). Ledit dispositif comprend au moins deux desdites conduites (62a, 64a), chaque port de commande étant relié à l'une ou l'autre desdites conduites, dans lesquelles une phase de l'oscillation du gaz permet d'entraîner le liquide dans la conduite (64a) après la formation d'une bulle au cours de l'autre phase de l'oscillation; la bulle est détachée par la force du liquide entraîné.

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