Method and apparatus for wood chip sizing

Details Method and apparatus for wood chip sizing Method and apparatus for wood chip sizing

B - Operations, Transporting

07

B

209/46

B07B 13/00 (2006.01) B07B 9/00 (2006.01) D21B 1/02 (2006.01)

Patent

CA 2036171

A system and process for sizing wood chips to provide a flow of wood chips which are acceptable for feeding to a digester of a pulping system. A flow management screen station is rovided which divides an incoming unacceptable flow (F0) into two fractional flows (F1, F2), neither of which is acceptable for feeding to the digester. One of the output flows from the flow management screen is concentrated in oversized and overthick chips compared to the incoming flow. The other output flow is concentrated in undersized chips and particles compared to the incoming flow. The output flows from the flow management screen are then fed to second and third screens (16, 14) which separate "overs" and "unders" from the respective flows to provide acceptable flows to the digester.

Système et procédé pour mesurer la taille des copeaux de bois dans le but de fournir un débit constant de copeaux qui puisse alimenter le lessiveur d'un système de pâte à papier. Le système comprend une station-écran qui divise un débit d'arrivée inacceptable (F0) en deux débits fractionnels (F1, F2) qui ne peuvent ni l'un ni l'autre alimenter le lessiveur. Un des débits de sortie de l'écran de gestion consiste principalement en des copeaux gros et épais comparativement au débit d'entrée et l'autre débit de sortie contient principalement des copeaux et des particules de petite taille comparativement au débit d'entrée. Les débits de sortie de l'écran de gestion alimentent ensuite un deuxième et un troisième écran (16, 14) qui séparent les copeaux trop gros et trop petits de leurs débits respectifs pour fournir des débits acceptables pour le lessiveur.

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