Shear mixing apparatus and use thereof

Details Shear mixing apparatus and use thereof Shear mixing apparatus and use thereof

B - Operations, Transporting

01

F

B01F 3/04 (2006.01) B01F 5/04 (2006.01) B01F 5/06 (2006.01) B01J 10/00 (2006.01) B01J 19/24 (2006.01) B01J 19/26 (2006.01)

Patent

CA 2198440

Shear mixing apparatuses and associated methods are disclosed for çontrollably and economically producing small bubbles, for example, of an average diameter of less than about 0,5 millimeters in a liquid, whereby mass transfer of the gas into the liquid is improved (as compared to the mass transfer achieved by conventional large bubble generators under the same circumstances) in applications benefiting by such; improved mass transfer, involving injecting a gas under pressure via one or more orifices into a liquid that is flowing at a velocity sufficient to cause bubbles formed at the orifice(s) to subdivide to the desired small bubble size.

Appareils de malaxage à effet de cisaillement et méthodes connexes permettant de produire dans un liquide, de façon contrôlée et économique, de petites bulles d'un diamètre moyen, par exemple, de moins d'environ 0,5 millimètre. Le transfert de masse du gaz dans le liquide est par conséquent amélioré (par comparaison au transfert de masse obtenu, dans les mêmes circonstances, au moyen de générateurs classiques de bulles de grande dimension) dans des applications où la présente invention est utilisée. Pour améliorer le transfert de masse, il suffit d'injecter un gaz comprimé via un ou plusieurs orifices dans un liquide s'écoulant à un débit suffisant pour que les bulles formées dans le ou les orifices se subdivisent pour créer de petites bulles de la dimension désirée.

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