Vacuum dryer

F - Mech Eng,Light,Heat,Weapons – 26 – B

Patent

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Details

F26B 5/04 (2006.01) B01F 15/00 (2006.01) B29B 13/06 (2006.01) B29C 31/06 (2006.01) F26B 15/04 (2006.01) F26B 17/12 (2006.01) F26B 25/00 (2006.01)

Patent

CA 2450916

A low pressure dryer (10) for granular or powdery material includes a plurality of canisters (12) rotatable about a common vertical axis serially among material heating (100), vacuum drying (102) and material inventory discharge (104) positions; pneumatic piston-cylinder means (34, 36, 38) for rotating the canisters (12) about said axis among said heating, vacuum drying and inventory discharge positions; means for heating (82) contents of a canister (12) at said heating position (100); means for sealing (40, 42) and drawing vacuum within a canister (12) at said vacuum drying position (102) and means (20) for selectably permitting downward flow of dried granular or powdery material out of a canister (12) at said discharge position (104) where said canisters move collectively and unitarily one with another.

L'invention concerne un séchoir basse pression (10) pour matériau granulaire ou pulvérulent, qui comprend plusieurs cartouches (12) tournant en série autour d'un axe vertical commun selon qu'il est placé dans une position de chauffage du matériau (100), ou de séchage à vide (102) ou de décharge d'inventaire des matériaux (104). Le séchoir basse pression comprend également un dispositif pneumatique à piston et cylindre (34, 36, 38) pour faire tourner les cartouches (12) autour dudit axe dans lesdites positions de chauffage ou de séchage à vide ou de décharge d'inventaire. Il comprend aussi un dispositif d'obturation (40, 42) et de création de vide à l'intérieur d'une cartouche (12) dans la position de séchage à vide (102), et un moyen (20) pour permettre au matériau granulaire ou pulvérulent séché de s'écouler vers le bas hors d'une cartouche (12) dans la position de décharge (104) où les cartouches se déplacent ensemble de concert les uns avec les autres.

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