Mixing apparatus and method for mixing gas in a closed reactor

Details Mixing apparatus and method for mixing gas in a closed reactor Mixing apparatus and method for mixing gas in a closed reactor

B - Operations, Transporting

01

F

B01F 7/16 (2006.01) B01F 3/04 (2006.01) B01F 13/02 (2006.01) B01F 15/00 (2006.01)

Patent

CA 2416461

The invention relates to a mixing apparatus and a method for mixing gas in a closed mixing reactor, which uses gas as a process chemical with a high efficienty and where the content of pulverous solids in the solution is great. The aim is to obtain a flow in the reactor which sucks gas from above the surface of the liquid using rotating mixing devices in the centre of the reactor, and to mix said gas throughout the reactor capacity. The mixing apparatus of the invention comprises at least two mixers located at different heights, and on the same shaft. The upper mixer is equipped with a central plate attached to the shaft, with essentially vertical inner blades rising upwards and downwards and outer vanes directed outwards from the central plate, which are inclined from the horizontal. The lower mixer is equipped with a central plate attached to the shaft with vertical blades located on the outer edge.

L'invention concerne un dispositif mélangeur et un procédé de mélange de gaz dans un réacteur mélangeur fermé, qui utilisent un gaz comme produit chimique de traitement à rendement élevé ; la solution présente une teneur élevée en matières solides poudreuses. Le procédé vise à produire dans le réacteur un flux qui aspire le gaz du dessus de la surface du liquide au moyen de dispositifs mélangeurs rotatifs situés au centre du réacteur, et à mélanger ce gaz dans tout le réacteur. Le dispositif mélangeur de l'invention comporte au moins deux mélangeurs situés à des hauteurs différentes sur le même arbre. Le mélangeur supérieur est pourvu d'une plaque centrale fixée à l'arbre, et comporte des pales intérieures essentiellement verticales qui montent et descendent ; ainsi que des ailettes extérieures s'étendant vers l'extérieur à partir de la plaque centrale, qui sont inclinées par rapport à l'horizontale. Le mélangeur inférieur est pourvu d'une plaque centrale fixée à l'arbre et comporte des pales verticales situées sur le bord extérieur.

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