Method and device in the regulation of a headbox

D - Textiles – Paper – 21 – F

Patent

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D21F 1/02 (2006.01) D21F 1/06 (2006.01) D21F 1/08 (2006.01)

Patent

CA 2127155

ABSTRACT A method in the regulation of a pulp suspension flow through the headbox of a paper machine/board machine wherein an additional flow is introduced into the pulp suspension at different points across the width of the headbox. The concentration of the additional flow is regulated by means of a mixer unit which includes a displaceable distributor part such that when the mixing ratio is being regulated, the flow resistances of the component flows, of the additional flow, entering into the mixer unit are adjusted by displacing the distributor part of the mixer unit in a chamber of the mixer unit. 31

Méthode de réglage de l'écoulement de la préparation de suspension par la caisse de tête d'une machine à papier/machine à carton dans laquelle un débit additionnel est introduit dans la préparation de la suspension à différents points de la largeur de la caisse de tête. La concentration du débit additionnel est réglée au moyen d'un mélangeur qui comprend une pièce de distributeur mobile de sorte que, pendant le réglage du rapport de mélange, les résistances à l'écoulement des composants du débit, du débit additionnel, entrant dans le mélangeur sont réglées en déplaçant la pièce du distributeur du mélangeur dans une chambre de ce même mélangeur.

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