Method for conveying on high-density bed powder materials...

B - Operations – Transporting – 65 – G

Patent

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Details

B65G 53/16 (2006.01) B65G 53/20 (2006.01) C25C 3/14 (2006.01)

Patent

CA 2331869

The invention concerns a method for conveying a powder material (12) on high-density bed by potential fluidisation, using a device comprising at least an air pipe system (3) comprising a lower pipe (5) for circulating a fluidizing gas (G), an upper pipe (7) for circulating the powder material (12), the two pipes being separated by a porous wall (6), at least a pipe (8) supplying gas (G) and an adjusting column (4.1, 4.2) whereof the filling height (h) adjusts the potential fluidisation (pf) pressure. The invention is characterised in that it consists in generating in the upper pipe (7) of the air pipe system (3) a gas bubble (B1, B2) under pressure. Said bubble is durably located in said air pipe system (3) upper pipe (7) upper portion (14). The invention also concerns device for implementing the method and for regulating the gas bubble pressure.

Procédé de convoyage d'un matériau pulvérulent (12) en lit hyperdense par fluidisation potentielle, utilisant un dispositif comprenant au moins une aérocanalisation (3), comportant un canal inférieur (5) destiné à la circulation d'un gaz de fluidisation (G), un canal supérieur (7) destiné à la circulation du matériau pulvérulent (12), les deux canaux étant séparés par une paroi poreuse (6), au moins une canalisation (8) d'alimentation en gaz (G) et une colonne d'équilibrage (4.1, 4.2) dont la hauteur de remplissage (h) équilibre la pression de fluidisation potentielle (p f), caractérisé en ce qu'on crée dans le canal supérieur (7) de l'aérocanalisation (3) une bulle (B1, B2) de gaz sous pression. Cette bulle est localisée durablement dans la partie supérieure (14) du canal supérieur (7) de ladite aérocanalisation (3). Dispositif pour mettre en oeuvre ce procédé et pour réguler la pression de la bulle de gaz.

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