Apparatus and method for classifying fine particles into sub...

Details Apparatus and method for classifying fine particles into sub... Apparatus and method for classifying fine particles into sub...

B - Operations, Transporting

07

B

B07B 7/04 (2006.01) B01D 45/06 (2006.01) B07B 7/02 (2006.01) B07B 7/086 (2006.01)

Patent

CA 2467395

A settling chamber for separating nanoparticles from microparticles. The settling chamber has an aspect ratio of sufficient value to allow the formation of two circulation zones of particles, one above the other. The settling chamber comprises a top section and a bottom section. An outlet port is located in the top section and an inlet port is located in a side of the bottom section. A gas fluidized particle stream is introduced through the inlet port into the settling chamber at a given velocity. A gas stream flow pattern is established within the settling chamber that retards transportation of microparticles to the outlet port while facilitating transportation of nanoparticles to the outlet port. Nanoparticles are then collected from the outlet port.

L'invention concerne une chambre de sédimentation conçue pour séparer les nanoparticules des microparticules. Ladite chambre présente un rapport de forme d'une valeur suffisante pour permettre la formation, l'une au-dessus de l'autre, de deux zones de circulation de particules. Elle comprend une section supérieure et une section inférieure. Un orifice de sortie est situé dans la section supérieure et un orifice d'admission sur un côté de la section inférieure. On introduit, dans la chambre de sédimentation, un courant particulaire fluidisé gazeux par l'orifice d'admission à une vitesse donnée. Un modèle d'écoulement du courant gazeux s'établit à l'intérieur de ladite chambre de manière à retarder le transport des microparticules vers l'orifice de sortie, tout en facilitant le transport des nanoparticules vers l'orifice de sortie, les nanoparticules étant alors recueillies à l'orifice de sortie.

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