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1. EP0777781 - A PULP SLURRY-HANDLING PRESS ROLL, AND TWIN ROLL AND SINGLE ROLL SLURRY-HANDLING PRESSES

Office European Patent Office
Application Number 95929576
Application Date 16.08.1995
Publication Number 0777781
Publication Date 11.06.1997
Publication Kind B1
IPC
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
D21F 3/00
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
3Press section of machines for making continuous webs of paper
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
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
D21D 5/06
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
DTREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
5Purification of the pulp suspension by mechanical means; Apparatus therefor
02Straining or screening the pulp
06Rotary screen-drums
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
CPC
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 BELOIT TECHNOLOGIES INC
Inventors LUTHI OSCAR
Priority Data 29387294 22.08.1994 US
9510448 16.08.1995 US
Title
(DE) PRESSWALZE ZUR BEHANDLUNG EINER STOFFSUSPENSION, SOWIE ZWILLINGSWALZE UND EINZELWALZE FÜR EINE PRESSE ZUR BEHANDLUNG EINER STOFFSUSPENSION
(EN) A PULP SLURRY-HANDLING PRESS ROLL, AND TWIN ROLL AND SINGLE ROLL SLURRY-HANDLING PRESSES
(FR) TAMBOUR DE TRAITEMENT DES BOUES DE PATE ET PRESSES MONO ET BICYLINDRES EN COMPORTANT
Abstract
(EN)
A drum (32) having a longitudinal axis, and an outer periphery, has a multiplicity of longitudinal, drainage grooves (16) formed therein, and a cylindrical sheath encloses the drum (32), the sheath having a multiplicity of holes (38) formed therein. The drum (32) is imperforate. A pair of the drums (32) is employed in a twin-roll press as press rolls, and one thereof is used in a single roll press with a compaction baffle. In one embodiment, the press roll (12, 14) has its grooves (16) formed in a herringbone pattern, the same pointed in the direction of rotation, to enhance drainage. In another embodiment, the longitudinal drainage grooves (16) have increasing depth, toward a mid-length of the press roll (12, 14) where they open into inner-drum drainage conduits which discharge the filtrate adjacent the rotaty axis of the press roll (12, 14).

(FR)
Tambour (32) à axe longitudinal, dont la périphérie présente une série de rainures (16) longitudinales d'écoulement, le tambour (32) étant entouré d'un gainage perforé d'une multitude de trous (38), le tambour (32) étant lui-même exempt de perforations. Deux de ces tambours (32) peuvent servir soit dans des presses bicylindres, un seul tambour étant utilisé dans des presses monocylindres à baffle de compactage. Dans l'une des variantes, les rainures (16) du tambour (12, 14) sont en arêtes de poisson pointées dans le sens de rotation. Dans une autre variante les rainures (16) d'écoulement présentent une profondeur accrue vers la mi-longueur du tambour (12, 14) où elles débouchent dans des conduits d'écoulement intérieurs au tambour qui amènent le filtrat à proximité de l'axe de rotation du tambour (12, 14).

Also published as
FI970738