A conveyor for transporting powder, and a method for...

B - Operations – Transporting – 65 – G

Patent

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Details

B65G 53/04 (2006.01) B65G 53/18 (2006.01) B65G 53/60 (2006.01)

Patent

CA 2725942

A conveyor (10) for transporting powder from an inlet point (14) to at least one discharge point (20) comprises a fluidized bed transport space (12) and a fluidization gas supply space (16), the fluidized bed transport space (12) being separated from the fluidization gas supply space (16) by a gas permeable wall (18); a gas outlet (22) for removing fluidization gas from the transport duct (12); means (24) for separating dust from the removed fluidization gas; and means (26) for returning the separated dust to the powder proximate the discharge point (20). In a preferred embodiment, the separated fines dust is returned to, and homogenized into, the powder in a lower portion of a cyclone, which is located at the discharge point.

L'invention concerne un transporteur (10) permettant de transporter de la poudre depuis un point d'entrée (14) jusqu'à au moins un point de décharge (20), le transporteur comportant un espace de transport à lit fluidisé (12) et un espace d'alimentation en gaz de fluidisation (16), l'espace de transport à lit fluidisé (12) étant séparé de l'espace d'alimentation en gaz de fluidisation (16) par une paroi perméable au gaz (18) ; une sortie de gaz (22) permettant de retirer du gaz de fluidisation du conduit de transport (12) ; un moyen (24) permettant de séparer la poussière du gaz de fluidisation retiré ; et un moyen (26) permettant de renvoyer la poussière séparée à la poudre à proximité du point de décharge (20). Dans un mode de réalisation préféré, la poussière fine séparée est renvoyée au niveau de la poudre, et homogénéisée dans celle-ci, dans une partie inférieure d'un cyclone, se trouvant au niveau du point de décharge.

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