Method and apparatus for disturbing networked pulp

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 21/04 (2006.01) B01D 21/02 (2006.01) B01D 21/06 (2006.01) B01D 21/18 (2006.01) B01D 21/20 (2006.01)

Patent

CA 2736778

The present invention provides a method (20) of separating pulp from a feed material within a tank (1), the method comprising the steps of (23) introducing the feed material (22) into the tank (1); (24) allowing the feed material (22) to settle in the tank (1); (25) allowing the pulp (21) to form into aggregates (13); (26) allowing the pulp aggregates (13) to settle towards the bottom of the tank (1) and form a networked layer (2) of pulp; and (27) causing a disturbance substantially uniformly across a disturbance zone (16) in an upper region of the networked layer (2), so as to disrupt the networked pulp in the disturbance zone within a predetermined period of time; thereby releasing entrained liquid from the networked pulp in the disturbance zone (16) and increasing the relative density of the pulp below the disturbance zone. The invention also provides a separation device (40) for separating pulp (21) from a feed material (22).

La présente invention porte sur un procédé (20) de séparation de pâte à partir d'une matière d'alimentation à l'intérieur d'une cuve (1), le procédé consiste à (23) introduire la matière d'alimentation (22) dans la cuve (1) ; (24) laisser la matière d'alimentation (22) décanter dans la cuve (1) ; (25) laisser la pâte (21) se mettre sous forme d'agrégats (13) ; (26) laisser les agrégats de pâte (13) décanter vers le fond de la cuve (1) et former une couche entrelacée (2) de pâte ; et (27) provoquer une perturbation pratiquement uniformément sur une zone de perturbation (16) dans une région supérieure de la couche entrelacée (2), de façon à déranger la pâte entrelacée dans la zone de perturbation sur une durée prédéfinie, ce qui libère de cette manière le liquide entraîné de la pâte entrelacée dans la zone de perturbation (16) et augmente la densité relative de la pâte au-dessous de la zone de perturbation. L'invention porte également sur un dispositif de séparation (40) pour la séparation de pâte (21) à partir d'une matière d'alimentation (22).

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