Method for controlling consistency of papermaking pulp

D - Textiles – Paper – 21 – F

Patent

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D21F 1/08 (2006.01)

Patent

CA 2277082

A procedure for adjusting the consistency of paper pulp, in which procedure: allowed minimum and maximum values are defined for the consistency of head box pulp and/or for the consistency of the tail liquid coming from the wire dehydrators (14, 15), the consistency of the pulp entering the head box (13) is measured by means of measuring element (4) and/or the consistency of the tail liquid coming from the wire dehydrators (14, 15) is measured by means of measuring element (5). Based on the measurement data of at least one consistency measurement and controlled by a control apparatus (8), liquid or pulp of desired consistency is supplied via a consistency regulating liquid line (1) into the pulp line leading to the head box (13) at a point after or before the wire pit (12) or directly into the wire pit (12) until the desired consistency is obtained.

Procédé servant à régler la consistance d'une pâte à papier et consistant à définir des valeurs minimum et maximum permises, soit pour la consistance de la pâte à papier de la caisse de tête, soit pour la consistance du liquide de sortie provenant des déshydrateurs (14, 15) de la table plate, à mesurer, soit la consistance de la pâte à papier pénétrant dans la caisse de tête (13) au moyen d'éléments de mesure (4), soit la consistance du liquide de sortie provenant des déshydrateurs (14, 15) de la table plate. àSur la base des données d'au moins une mesure de consistance et sous la commande d'un dispositif de régulation (8), le liquide ou la pâte à papier présentant la consistance souhaitée alimentent, par l'intermédiaire d'un conduit de pâte à papier conduisant à la caisse de tête (13) à un point situé après ou avant la fosse sous toile (12) ou directement vers l'intérieur de la fosse sous toile (12) jusqu'à obtention de la consistance souhaitée.

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