D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 1/02 (2006.01) D21F 1/08 (2006.01)
Patent
CA 2258232
The invention concerns an equipment for combining a dilution flow (L1) with the stock flow (L2) passed out of the inlet header (J1) in a paper/board machine. The equipment comprises dilution flow ducts (D1, D2...), through which the dilution flow (L1) is passed to the desired location across the width of the headbox of the paper/board machine so as to regulate the basis weight of the paper/board web to the desired level. The dilution flow duct (D1, D2...) is constructed in such a way in its final end (D1a, D2a...) that it becomes narrower towards its end. Branch ducts (E1.1, E1.2...; E2.1, E2.2...) are placed in the area of said narrowing, out of which branch ducts the dilution flow is passed into the system of pipes (11, G), in which the dilution flow is combined with the stock flow (L2) passed out of the inlet header (J1).
La présente invention concerne un mélangeur pour diluant (L1) et pâte à papier (L2) débités par le caisson de distribution (J1) d'une machine à papier ou carton. Ce mélangeur se compose de tubes d'amenée de diluant (D1, D2...) apportant le diluant (L1) au point désiré selon la largeur du caisson de distribution de la machine à papier ou carton de façon à obtenir le grammage souhaité pour la bande de papier ou de carton. L'extrémité débitrice des tubes d'amenée de diluant (D1, D2...) va en se rétrécissant. Des tubes secondaires (E1.1, E1.2...; E2.1, E2.2...) partant des extrémités rétrécies conduisent le diluant dans des tubulures (11, G) dans lesquelles le diluant se mélange à la pâte à papier (L2) débitée par le caisson de distribution (J1).
Metso Paper Inc.
Sim & Mcburney
Valmet Corporation
LandOfFree
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