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1. WO2010138056 - A DEVICE FOR PREVENTING THE REWETTING OF PULP

Publication Number WO/2010/138056
Publication Date 02.12.2010
International Application No. PCT/SE2010/050263
International Filing Date 09.03.2010
IPC
D21C 9/18 2006.1
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
D21C 9/06 2006.1
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
B01D 33/067 2006.1
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 2006.1
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
D21D 1/40 2006.1
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
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
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 ; ; 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
D21F 1/74
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
1Wet end of machines for making continuous webs of paper
66Pulp catching, de-watering, or recovering; Re-use of pulp-water
74using cylinders
Applicants
  • METSO PAPER, INC. [FI]/[FI] (AllExceptUS)
  • LUNDBERG, Jörgen [SE]/[SE] (UsOnly)
Inventors
  • LUNDBERG, Jörgen
Agents
  • GROTH & CO. KB
Priority Data
0900735-229.05.2009SE
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) A DEVICE FOR PREVENTING THE REWETTING OF PULP
(FR) DISPOSITIF POUR EMPÊCHER LA RÉHUMIDIFICATION DE LA PÂTE À PAPIER
Abstract
(EN) A device (302; 801) for preventing the rewetting of pulp in an apparatus for processing pulp, the apparatus comprising at least one rotatable drum (202, 204) provided with a permeable outer surface (206, 208) and a plurality of axial filtrate channels (210, 212) provided inwardly of the outer surface (206, 208). The apparatus removes liquid from the pulp and transports the liquid to the filtrate channels (210, 212) through the outer surface (206, 208). The device is adapted to be installed in one of the filtrate channels (210, 212), and comprises an axially extending filtrate barrier element (304; 804; 904) for preventing the flow of liquid from the trailing part of the filtrate channel (210, 212) to the outer surface (206, 208) of the drum (202, 204), and at least one axially extending support element (308; 808) connected to the filtrate barrier element. At least one biasing member (308, 310, 312; 808, 810) is adapted to bias the filtrate barrier element away from the support element to a first unbiased position, in relation to the support element, at which an extended transverse extension of the device is provided, and adapted to bias the filtrate barrier element away from the support element to at least one second unbiased position, in relation to the support element, at which a reduced transverse extension of the device (302; 801) is provided. The device (302; 801) comprises locking means (602; 702, 704, 707, 714; 902, 950, 952; 702, 714, 958) for axially locking the elements (304, 306; 804, 808; 904) in relation to each other, to prevent the relative axial movement of the elements, whereby the axial dislocation of the device is prevented. An apparatus for processing pulp comprising said device (302; 801).
(FR) L'invention concerne un dispositif (302 ; 801) destiné à empêcher la réhumidification de la pâte à papier dans un appareil de transformation de pâte à papier, l'appareil comportant au moins un tambour rotatif (202, 204) doté d'une surface extérieure perméable (206, 208) et d'une pluralité de conduits axiaux (210, 212) pour filtrat aménagés intérieurement à la surface extérieure (206, 208). L'appareil enlève du liquide de la pâte à papier et transporte le liquide vers les conduits (210, 212) pour filtrat à travers la surface extérieure (206, 208). Le dispositif est prévu pour être installé dans l'un des conduits (210, 212) pour filtrat et comporte un élément (304 ; 804 ; 904) de barrière pour filtrat s'étendant axialement afin d'empêcher un écoulement de liquide de la partie arrière du conduit (210, 212) pour filtrat jusqu'à la surface extérieure (206, 208) du tambour (202, 204), et au moins un élément (308 ; 808) de soutien s'étendant axialement, relié à l'élément de barrière pour filtrat. Au moins un organe (308, 310, 312 ; 808, 810) de sollicitation est prévu pour solliciter l'élément de barrière pour filtrat de façon à l'écarter de l'élément de soutien jusqu'à une première position sans sollicitation, par rapport à l'élément de soutien, où une étendue transversale agrandie est conférée au dispositif, et prévu pour solliciter l'élément de barrière pour filtrat de façon à l'écarter de l'élément de soutien jusqu'à au moins une deuxième position sans sollicitation, par rapport à l'élément de soutien, où une étendue transversale rétrécie est conférée au dispositif (302 ; 801). Le dispositif (302 ; 801) comporte des moyens (602 ; 702, 704, 707, 714 ; 902, 950, 952 ; 702, 714, 958) de blocage servant à bloquer axialement les éléments (304, 306 ; 804, 808 ; 904) les uns par rapport aux autres, afin d'empêcher un mouvement relatif axial des éléments, la dislocation axiale du dispositif étant ainsi empêchée. L'invention concerne également un appareil de transformation de pâte à papier comportant ledit dispositif (302 ; 801).
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