Method and apparatus for defibering and screening recycled...

D - Textiles – Paper – 21 – B

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92/54

D21B 1/32 (2006.01) D21B 1/34 (2006.01)

Patent

CA 2207352

A method and an apparatus for defibering and screening recycled fibre material. In the method, fibre mass is defibered in a primary pulper that is a vertical pulper operating at a high consistency. From the primary pulper the fibre mass is supplied along a transfer conduit (4) to a secondary pulper that is correspondingly a vertical pulper operating at a low consistency. The apparatus comprises a primary pulper that is a vertical pulper operating at a high consistency, and a secondary pulper that is a vertical pulper operating at a low consistency. Between the primary pulper and the secondary pulper there is a transfer conduit (4) along which the fibre mass flows from the primary pulper to the secondary pulper solely by the action of the pressure difference produced by the difference in the fluid levels of the pulpers.

Une méthode et un appareil pour triturer et épurer des fibres recyclées. L'appareil consiste en un triturateur primaire et un triturateur secondaire. Au cours de cette méthode, la masse de fibre est triturée dans un triturateur primaire vertical fonctionnant à haute constance. La masse de fibre est acheminée du triturateur primaire au triturateur secondaire au moyen d'un conduit de transfert (4). La masse de fibre est transportée dans ce conduit par la seule variation de pression produite par les niveaux de liquides des triturateurs. Le triturateur secondaire est également vertical et fonctionne à faible constance.

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