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1. EP2766523 - DEVICE FOR PREVENTING REWETTING OF CELLULOSE PULP

Office
European Patent Office
Application Number 12839805
Application Date 11.10.2012
Publication Number 2766523
Publication Date 20.08.2014
Publication Kind A4
IPC
D21C 9/18
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
9After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters
18De-watering
B01D 33/067
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
33Filters with filtering elements which move during the filtering operation
06with rotary cylindrical filtering surfaces, e.g. hollow drums
067Construction of the filtering drums, e.g. mounting or sealing arrangements
B30B 9/20
BPERFORMING OPERATIONS; TRANSPORTING
30PRESSES
BPRESSES IN GENERAL; PRESSES NOT OTHERWISE PROVIDED FOR
9Presses specially adapted for particular purposes
02for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
20using rotary pressing members, other than worms or screws, e.g. rollers, rings, discs
D21C 9/06
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
9After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters
02Washing
06in filters
D21D 1/40
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
DTREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
1Methods of beating or refining; Beaters of the Hollander type
20Methods of refining
40Washing the fibres
CPC
D21C 9/06
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
9After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
02Washing ; ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
06in filters ; ; Washing of concentrated pulp, e.g. pulp mats, on filtering surfaces
D21C 9/18
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
9After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
18De-watering
D21D 1/40
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
DTREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
1Methods of beating or refining; Beaters of the Hollander type
20Methods of refining
40Washing the fibres
Applicants VALMET AKTIEBOLAG
Inventors LUNDBERG JÖRGEN
LÖVGREN HANS
Designated States
Priority Data 1150946 12.10.2011 SE
Title
(DE) VORRICHTUNG ZUR VERHINDERUNG DER WIEDERBEFEUCHTUNG VON ZELLSTOFF
(EN) DEVICE FOR PREVENTING REWETTING OF CELLULOSE PULP
(FR) DISPOSITIF DESTINÉ À EMPÊCHER LE RETREMPAGE D'UNE PÂTE DE CELLULOSE
Abstract
(EN) A device (10) is provided for preventing rewetting in a pulp washer (100), with two press rolls (2), arranged to rotate in opposite directions and having permeable outer surfaces (4), inside of which filtrate channels (6) are arranged. The device (10) comprises an anti-rewet beam (12), the cross-section of which forms a closed shape. The anti-rewet beam in turn comprises a filtrate barrier (12a) positioned towards the outer wall (6a) of the filtrate channel to prevent flow of liquid from the trailing part of the filtrate channel to the outer surface of the press roll, a support member (12b) positioned towards the rear side wall (6d) of the filtrate channel, and at least one intermediate beam portion (12c, 12c'), interconnecting the filtrate barrier and the support member, to form the closed beam shape.
(FR) La présente invention concerne un dispositif (10) destiné à empêcher un retrempage dans un laveur de pâte (100), doté de deux rouleaux presseurs (2) conçus pour tourner dans des sens opposés et présentant des surfaces extérieures perméables (4) et à l'intérieur desquels des canaux de filtration (6) sont disposés. Le dispositif (10) comprend une barre anti-retrempage (12) dont la section transversale présente une forme fermée. La barre anti-retrempage comprend à son tour une barrière de filtration (12a) positionnée vers la paroi extérieure (6a) du canal de filtration pour empêcher le liquide de circuler de la partie arrière du canal de filtration vers la surface extérieure du rouleau presseur, un élément de support (12b) positionné vers la paroi latérale arrière (6d) du canal de filtration et au moins une partie de barre intermédiaire (12c, 12c'), couplant entre eux la barrière de filtration et l'élément de support, pour obtenir la forme d'une barre fermée.
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