Rotary drum for drying pourable goods

Details Rotary drum for drying pourable goods Rotary drum for drying pourable goods

F - Mech Eng,Light,Heat,Weapons

26

B

F26B 11/04 (2006.01)

Patent

CA 2263178

Directly heated rotary drums are used in the drying of pourable goods such as wood chips or strands. Drums are provided with built-in fixtures such as cross fixtures, in order to ensure good heat transmission from the drying gas to the goods. The invention comprises a design for a rotary drum (4) which enables good transmission of drying gas to the goods and which is cheap to produce and assemble in comparison with cross fixtures. According to the invention the built-in fixtures in the rotary drum (4) extend radially in the direction of the middle of the drum, starting from the perimeter, over an area of 60 to 85 % of the radius of the rotary drum (4), form at least two pockets, and run, apart from the area close to the perimeter, substantially in the direction of rotation (25), in front of the radial starting from their point of attachment. These radially shaped built-in fixtures enable constant distribution of the goods over the cross-section and are substantially cheaper to manufacture and assemble.

Des tambours rotatifs à chauffage direct sont utilisés pour le séchage d'un matériau coulant, notamment pour le séchage de copeaux de bois ou de copeaux longs. Pour assurer un bon transfert thermique du gaz de séchage au matériau à sécher, les tambours rotatifs sont munis de chicanes, par exemple de chicanes en croix. L'invention vise à mettre au point un tambour rotatif (4) qui permet un bon transfert thermique du gaz de séchage au matériau et dont les coûts de fabrication et de montage sont réduits par rapport aux modèles à chicanes en croix. Dans un tambour rotatif (4) selon l'invention, les chicanes s'étendent radialement depuis la périphérie en direction du centre du tambour sur une zone de 60 à 85 % du rayon du tambour rotatif (4), forment au moins deux niches et s'étendent, sauf au voisinage de la périphérie, sensiblement dans le sens de rotation (25) devant leur rayon radial partant du point de fixation. Ces chicanes radiales permettent une répartition uniforme du matériau sur la section et sont sensiblement plus avantageuses à fabriquer et à monter.

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