Central screen

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D - Textiles, Paper

21

C

D21C 7/00 (2006.01) D21C 7/14 (2006.01)

Patent

CA 2567046

Methods for continuously producing pulp from lignocellulose-containing material in a digester are disclosed in which the porous lignocellulose- containing material is fed from the top to the bottom of the digester, liquor is pumped through the porous column of lignocellulose-containing material in a predetermined direction, and liquor is simultaneously withdrawn through at least one central screen assembly and through a wall screen assembly. A digester for continuously producing pulp from lignocellulose-containing material is also disclosed.

L'invention concerne des procédés pour produire en continu une pulpe à partir d'un matériau contenant de la lignocellulose dans un digesteur dans lequel le matériau poreux contenant de la lignocellulose est alimenté du haut vers le bas. La liqueur est pompée via une colonne poreuse du matériau contenant de la lignocellulose dans une direction prédéterminée et simultanément évacuée via au moins un assemblage de tamis et via l'ensemble de tamis de paroi. L'invention concerne aussi un digesteur destiné à produire la pulpe en continu à partir du matériau contenant de la lignocellulose.

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