Gas injection apparatus and method

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 47/02 (2006.01) B01F 3/04 (2006.01) B01F 5/04 (2006.01) C02F 1/74 (2006.01)

Patent

CA 2072285

The present invention provides a gas injection apparatus for dissolving a gas in a flowing liquid. The apparatus comprises a conduit having a passageway through which flowing liquid flows. An injection pipe in communication with the passageway is provided for injecting gas into the flowing liquid so that a plurality of undissolved gas bubbles are produced within the flowing liquid. Preferably, the passageway has a pair of opposed centrally located side pocket regions for dividing the flowing liquid into a main flow region flowing in the predominant direction of flow of the liquid and two circulating side flow region situated along side the main flow region and within which the gas dissolves. The gas dissolved in the side flow regions produces a concentration gradient driving the gas from the side flow regions into the main flow region for discharge out of an outlet of the conduit.

La présente invention porte sur un appareil d'injection de gaz pour dissoudre un gaz dans un liquide en écoulement. L'appareil comprend un conduit ayant un passage dans lequel s'écoule le liquide. Un tuyau d'injection en communication avec le passage permet d'injecter le gaz dans le liquide en écoulement, de sorte qu'une pluralité de bulles de gaz non dissous sont produites dans le liquide en écoulement. De préférence, le passage comporte deux alvéoles latérales opposées situées centralement pour diviser le liquide en une zone d'écoulement principale allant dans le sens prédominant d'écoulement du liquide et deux zones d'écoulement latérales situées en bordure de la zone d'écoulement principale et dans lesquelles le gaz se dissout. Le gaz dissous dans les zones d'écoulement latérales produit un gradient de concentration entraînant le gaz des zones d'écoulement latérales vers la zone d'écoulement centrale pour évacuation par la sortie du conduit.

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