Paper web dryer and paper moisture profiling system

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 5/00 (2006.01) D21F 5/04 (2006.01) F26B 13/22 (2006.01) F26B 25/22 (2006.01)

Patent

CA 2164942

Apparatus for drying a wet paper web during manufacturing of the paper web. The apparatus allows the moisture profile of the web to be carefully controlled and adjusted. The apparatus includes a rotatable dryer drum (10) and a hood (14) partially encompassing the rotatable dryer drum (10). A plurality of elongated heater nozzle boxes (16) are disposed in the hood (14) interior and extend across the dryer drum (10) in the cross-machine direction, the elongated heater nozzle boxes (16) being arrayed side-by-side in the machine direction. A plurality of gas burners (30) is located in each of the nozzle box interiors and arranged side-by-side along the length of the nozzle box interiors of the heater nozzle boxes (16).

L'invention concerne un appareil pour sécher une bande de papier humide dans une machine à papier. Cet appareil, qui permet d'ajuster avec soin l'humidité de la bande, comprend un tambour sécheur rotatif (10) et une hotte (14) entourant partiellement le tambour sécheur rotatif (10). Un certain nombre de boîtes à buses (16) allongées et pourvues d'un dispositif de chauffage sont disposées à l'intérieur de la hotte (14), sur toute la largeur du tambour sécheur (10), transversalement par rapport à la machine. Les boîtes à buses allongées (16) sont disposées côte à côte dans la direction de la machine. Chaque boîte à buses comporte une pluralité de brûleurs à gaz internes (30) disposés côte à côte sur la longueur de la boîte à buses (10).

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