A method and apparatus for maintaining solids in suspension...

C - Chemistry – Metallurgy – 02 – F

Patent

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C02F 3/12 (2006.01) B01F 13/02 (2006.01) C02F 3/28 (2006.01) C05F 17/00 (2006.01) C12M 1/04 (2006.01)

Patent

CA 2232949

Apparatus for use in a variety of processes especially those involving bacterial activity such as slurry digestion comprises an elongate stationary container (10) having a cardioid cross section with an upstanding partial partition (16) projecting upwardly from a lower region and providing a linear array of outlets (15) for the introduction of gas bubbles to the interior of the container. The cardioid container wall comprises a continuous double-lobed curve from an upper region (19) having gas escape outlets (17) to a lower region where the wall curves into tangential relation with the partial partition (16). A modular array of containers in cascade or parallel connection can be interconnected by pipework with valves, pumps and flow sensors for automatic or programmed operation.

L'invention porte sur un appareil utilisable dans le cadre de divers processus notamment ceux faisant intervenir une activité bactérienne comme la digestion d'une boue. Cet appareil comporte un conteneur fixe (10), de forme allongée, à section cycloïde cardioïde, pourvu d'un segment de cloison verticale (16) s'élevant depuis une zone inférieure et offrant une rangée linéaire d'orifices (15) permettant l'introduction de bulles de gaz à l'intérieur du conteneur. La paroi du conteneur de forme cycloïde cardioïde consiste en une courbe ininterrompue à deux lobes, partant d'une zone supérieure (19) pourvue d'orifices d'échappement de gaz (17), et s'achevant dans une zone inférieure où elle s'incurve jusqu'à être tangente au segment de cloison verticale (16). Il est possible de connecter des conteneurs, raccordés en cascade ou en parallèle et constituant une rangée modulaire, par une tuyauterie pourvue de soupapes, de pompes et de capteurs de débit aux fins d'un fonctionnement automatique ou programmé.

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