Apparatus for aerating and/or anaerobically mixing liquids

C - Chemistry – Metallurgy – 02 – F

Patent

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Details

C02F 3/12 (2006.01) B01F 3/04 (2006.01) B01F 3/08 (2006.01) B01F 5/02 (2006.01) B01F 7/00 (2006.01) B01F 7/16 (2006.01) B01F 15/00 (2006.01) C02F 3/30 (2006.01)

Patent

CA 2133154

An apparatus for selectively aerating or anaerobically mixing a liquid in a container includes a hollow, star-shaped, multi-vaned rotor (6) arranged in the bottom region of the container (1) for rotation about a vertical axis. The hollow interior of the rotor at one of the two opposite faces thereof is in communication with a gas feed line (15), and each of the vanes (10) at its trailing flank (11), as viewed in the direction of rotation of the rotor, is provided with a respective gas exit opening (12). The inter-vane spaces of the rotor are open at one of its two opposite faces for admitting liquid from the container into those spaces. The rotor is surrounded by a stator (7) providing a plurality of circumferentially spaced flow channels (9) for receiving and guiding away either liquid with admixed gas when gas flows through the gas feed line or liquid without admixed gas when no gas flows through the gas feed line. The rotor is provided in its inter-vane spaces with respective guide plates (18) interposed between the gas exit openings and the liquid entry locations for shielding the gas exit openings and for preventing liquid in the intervane spaces from being sucked into the rotor through the gas exit openings when no gas is flowing through the gas feed line.

Dispositif permettant l'aération ou le mélange anaérobie de liquides dans un contenant comprenant un rotor creux, multipale, en forme d'étoile (6) placé dans la partie inférieure du contenant (1) et tournant sur un axe vertical. L'intérieur creux du rotor sur l'une de ses deux faces opposées communique avec une canalisation d'alimentation en gaz (15), et chaque pale (10), à son bord de fuite (11), vue dans le sens de rotation du rotor, est munie d'un orifice de sortie du gaz (12). Les espaces entre les pales du rotor sont ouverts à l'une des deux faces opposées afin d'y laisser entrer le liquide venant du contenant. Le rotor est entouré d'un stator (7) qui offre une série de passages d'écoulement (9) espacés en périphérie afin de recevoir et d'éloigner soit le liquide avec le gaz mélangé lorsque le gaz s'écoule par la canalisation d'alimentation en gaz, soit le liquide sans le gaz mélangé lorsqu'il n'y a pas de gaz qui s'écoule dans la canalisation d'alimentation en gaz. Le rotor est muni dans les espaces entre les pales de plaques-guides (18) placées entre les orifices de sortie du gaz et les entrées du liquide afin de protéger les orifices de sortie du gaz et d'empêcher que le liquide dans les espaces entre les pales ne soit aspiré dans le rotor par les orifices de sortie du gaz lorsque le gaz ne s'écoule pas dans la canalisation d'alimentation.

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