WO2009136849A1 - Dispositif d’alimentation coaxial à filetages ayant une partie supérieure - Google Patents

Dispositif d’alimentation coaxial à filetages ayant une partie supérieure Download PDF

Info

Publication number
WO2009136849A1
WO2009136849A1 PCT/SE2009/050476 SE2009050476W WO2009136849A1 WO 2009136849 A1 WO2009136849 A1 WO 2009136849A1 SE 2009050476 W SE2009050476 W SE 2009050476W WO 2009136849 A1 WO2009136849 A1 WO 2009136849A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
refiner
coaxial feeder
intended
threads
Prior art date
Application number
PCT/SE2009/050476
Other languages
English (en)
Other versions
WO2009136849A9 (fr
Inventor
Hans-Olof Backlund
Göran BYSTRÖM
Johan FÄLLMAN
Original Assignee
Metso Paper, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metso Paper, Inc. filed Critical Metso Paper, Inc.
Publication of WO2009136849A1 publication Critical patent/WO2009136849A1/fr
Publication of WO2009136849A9 publication Critical patent/WO2009136849A9/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/02—Crushing or disintegrating by disc mills with coaxial discs
    • B02C7/06—Crushing or disintegrating by disc mills with coaxial discs with horizontal axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/11—Details
    • B02C7/16—Driving mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C11/00—Other auxiliary devices or accessories specially adapted for grain mills
    • B02C11/04—Feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/02—Feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/11—Details
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/14—Disintegrating in mills
    • D21B1/18—Disintegrating in mills in magazine-type machines
    • D21B1/22—Disintegrating in mills in magazine-type machines with screw feed

Definitions

  • Coaxial feeder with threads having a top .
  • the present invention relates to a refiner for refining of fibre material containing lignocellulose by means of opposed, with respect to each other rotating rotors, which are provided with refining elements, which between themselves define a refiner gap with a refining zone for processing of the material.
  • the material is brought to a feeding zone arranged radially inwardly of the refining zone.
  • the invention also relates to a coaxial feeder (a feed ring) to be used in the device.
  • the invention relates to the preparation of different types of mechanical pulps, such as refiner mechanical pulp (RMP), thermomechanical pulp (TMP), chemimechanical pulp (CMP), and chemithermomechanical pulp (CTMP).
  • RMP refiner mechanical pulp
  • TMP thermomechanical pulp
  • CMP chemimechanical pulp
  • CTMP chemithermomechanical pulp
  • the starting material may be wood chips or more or less processed pulp.
  • the invention relates to feeding to a refiner, in which both of the opposed rotors are rotating, and the feeding of material must be effected by a rotor in order to reach the space between them.
  • a coaxial feeder is arranged for this purpose.
  • the coaxial feeder may be compared to a short and quickly rotating feed screw.
  • the coaxial feeder is suitably arranged on the same shaft as one of the rotors in order to rotate together with it.
  • a problem related to known coaxial feeders is that the wood chips, due to the centrifugal force, partly are carried radially outwardly, perpendicular to the desired direction of transport, and thus a considerable part of the wood chips to be transported instead tend to stick between the coaxial feeder and the surrounding tubular wall. This results in a heavy rotation of the coaxial feeder and additionally, more material is gradually built up, such that it may be necessary to open up the space around the coaxial feeder at regular intervals for cleaning and maintenance.
  • the present invention is directed towards solving the problems that are mentioned above and that exist in the prior art.
  • a refiner for refining of material such as wood chips or the like, which refiner comprises: a first and a second opposed and with respect to each other rotatable rotors, which are provided with refining elements, and which between themselves define a refiner gap with a refining zone for processing of the material, the first rotor comprising openings having an inlet side and an outlet side intended for letting material through, and the outlet side being adjacent to a feeding zone in the refiner gap; a feed chamber to which the material is arranged to be fed, and which is adjacent to the inlet side of the openings of the rotor; a coaxial feeder having a screw body and helix shaped threads, which coaxial feeder is arranged inside the feed chamber to rotate together with the first rotor and to feed the material to the openings of the rotor.
  • the threads of the coaxial feeder comprise an essentially straight part which extends essentially perpendicular out from the screw body and which, in operation, is intended to carry the material in the longitudinal direction towards the refiner gap, which straight part passes into a top that is intended to limit the motions of the material radially.
  • the invention also relates to a corresponding coaxial feeder.
  • the feeding into the space between the rotors is considerably improved.
  • the need for maintenance and cleaning is reduced since the material around the coaxial feeder is considerably less prone to plugging thanks to the inventive design.
  • Fig. 1 shows a refiner according to an embodiment of the invention
  • Fig. 2 shows a front view of a coaxial feeder according to an embodiment of the invention
  • Fig. 3 shows a perspective view of the coaxial feeder of figure 2
  • Fig. 4 shows a side view of the coaxial feeder of figure 2
  • Fig. 5 shows a front view of a rotor partly in cross-section
  • Fig. 6 shows a front view of a rotor having a coaxial feeder according to an embodiment of the invention mounted thereon;
  • Fig. 7 shows a perspective view of the rotor and the coaxial feeder of figure 6.
  • the refiner or beating apparatus shown in fig 1 comprises a housing 10 in which is arranged a first rotor 11 and a second opposed rotor 12, each of which is attached to a separate rotating shaft 13 and 14, respectively.
  • the rotors 11, 12 are each provided with a refining element 15 and 16, respectively, which between themselves define a refining zone 17 in a refiner gap between the refining elements.
  • the refiner gap also comprises a feeding zone 18 radially inwardly, to which the material is intended to be fed.
  • the first rotor 11 is provided with a central feeding opening 19 for the material to be processed.
  • the housing 10 is also provided with an outlet 21 to carry away the material that has passed through the refiner gap and thereby has been processed to pulp.
  • a feed screw 20 is arranged to carry the material to a feeding chamber 22 in connection with the feeding opening 19.
  • a coaxial feeder 23 (“ring feeder”) is arranged, which coaxial feeder is preferably arranged on the same shaft 13 as the first rotor 11.
  • the coaxial feeder 23 rotates together with said rotor 11.
  • the material that is fed into the feeding chamber 22 is carried towards and through the feeding opening 19 of the first rotor 11 and for this to be efficiently performed; the rotor 11 and the coaxial feeder 23 should be fixed with respect to each other.
  • the coaxial feeder 23 is shown in detail.
  • the coaxial feeder 23 is provided with a screw body 24 and at least one helix shaped wing or thread 25.
  • the threads are arranged to carry the material into and through the openings 19 of the first rotor 11.
  • the threads 25 comprise an essentially straight part 25a that extends essentially perpendicular from the screw body 24 and that in operation is intended to carry the material in the longitudinal direction of the axis towards the refiner gap.
  • the straight part 25a passes into a top 25b that is intended to limit the motion of the material radially.
  • the straight part 25a and the top 25b are thus interconnected, preferably by a smooth transition.
  • the top 25b tapers outwardly from the essentially straight part 25a of the threads and forms a tip 25c in the forward direction with respect to the intended direction of rotation R of the coaxial feeder 23.
  • the top 25b of the threads thus have an underside that is intended to limit the motion of the material radially and that is essentially parallel to the axis L of the coaxial feeder 23.
  • the underside is slightly slanted upwardly from the essentially straight part 25a, whereby the tip 25c of the top may cut through the incoming material and carry it on towards the space between the rotors, via the openings 19 of the first rotor 11.
  • the coaxial feeder is designed such that the top 25b does not extend all the way into the rotor 11. This design is advantageous since it reduces the risk of plugging at the respective inlets of the openings 19.
  • the gap that is formed between the thread 25 and the rotor 11 is also advantageous since the inlets of the openings 19 thereby may be made larger than the extension of the coaxial feeder. That this is the case in the embodiment shown, is most clearly seen in figure 6.
  • the coaxial feeder 23 is provided with four threads 25, which are all designed equally, i.e. having an essentially straight part 25a with which a top 25b is connected. It is understood by a person skilled in the art that the number of threads may be varied from one and upwards in order to match different conditions of operation.
  • the number of threads is between 2 and 8. It is further understood by the skilled person that the number of threads, and their placement, should correspond to the openings 19 of the first rotor, such that the material that has been carried forward by the respective thread 25 arrives at an opening 19 and thereby may be carried further towards the space between the rotors 11 and 12.
  • the rotor 11 is shown separately, where the openings 19 are shown partly in cross-section, such that the inlet as well as the double outlets 19a and 19b are visible. From figure 5, it is also evident that the rotor 11 is provided with four feeding openings 19, each of which having one inlet and two outlets 19a and 19b. The foremost reason for each opening 19 to have two outlets is that the feeding of material to the refining zone shall be efficient regardless of in which direction the rotor 11 is rotating. Thus, the material will be carried through one set of openings when the rotor rotates in a first direction and through the other set of openings when the rotor rotates in the other direction.
  • the coaxial feeder 23 in the embodiment shown is screwed onto the rotor 11 by means of screws 26.
  • the screws 26 are screwed into screw holes 27 in the rotor, which holes are shown in figure 5.
  • the coaxial feeder 23 is placed such that the openings 19 will form a natural continuation for the material that has been fed by the respective threads 25.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

La présente invention se rapporte à un raffineur servant à raffiner de la matière telle que des copeaux de bois ou similaires, qui comprend : des premier et second rotors opposés et pouvant tourner l’un par rapport à l’autre (11, 12), qui sont dotés d’éléments de raffinage (15, 16) et qui délimitent entre eux un espace de raffinage avec une zone de raffinage (17) pour le traitement de la matière. Le premier rotor (11) comprend des ouvertures (19) ayant un côté entrée et un côté sortie (19a, 19b) conçus pour le passage de la matière, le côté sortie étant adjacent à la zone d’alimentation (18) de l’espace de raffinage ; une chambre d’alimentation (22) vers laquelle doit être acheminée la matière, et qui est adjacente au côté entrée des ouvertures (19) du rotor ; un dispositif d’alimentation coaxial (23) comportant un corps de vis (24) et des filetages en forme d’hélice (25), ledit dispositif d’alimentation coaxial (23) étant placé à l’intérieur de la chambre d’alimentation (22) afin de tourner en même temps que le premier rotor (11) et de porter la matière vers les ouvertures (19) du rotor. Les filetages (25) du dispositif d’alimentation coaxial (23) comprennent une partie essentiellement droite (25a) qui s’étend essentiellement depuis le corps de vis (24) et qui, en fonctionnement, est destinée à porter la matière dans la direction longitudinale vers l’espace de raffinage, la partie droite (25a) passe dans une partie supérieure (25b) qui est destinée à limiter le mouvement radial de la matière.
PCT/SE2009/050476 2008-05-08 2009-04-30 Dispositif d’alimentation coaxial à filetages ayant une partie supérieure WO2009136849A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0801030-8 2008-05-08
SE0801030A SE532411C2 (sv) 2008-05-08 2008-05-08 Koaxiell matare för raffinör

Publications (2)

Publication Number Publication Date
WO2009136849A1 true WO2009136849A1 (fr) 2009-11-12
WO2009136849A9 WO2009136849A9 (fr) 2010-03-25

Family

ID=41264777

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2009/050476 WO2009136849A1 (fr) 2008-05-08 2009-04-30 Dispositif d’alimentation coaxial à filetages ayant une partie supérieure

Country Status (2)

Country Link
SE (1) SE532411C2 (fr)
WO (1) WO2009136849A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2726669A1 (fr) * 2011-07-01 2014-05-07 Metso Paper Sweden AB Vis sans fin d'alimentation, dispositif à vis sans fin d'alimentation, et broyeur pour substance lignocellulosique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3843065A (en) * 1972-10-13 1974-10-22 Bauer Bros Co Labyrinth seal ring for pulp refiner
US3889890A (en) * 1974-01-21 1975-06-17 Bauer Bros Co Refiner disc
US4191338A (en) * 1977-06-03 1980-03-04 The Bauer Bros. Co. Infeed disc for disc-type refiners
DE3712042A1 (de) * 1987-04-09 1988-10-27 Schnell Maschfab Karl Zerkleinerungsmaschine, insbesondere fuer knochen, fleisch u. dgl.
WO1998036836A1 (fr) * 1997-02-25 1998-08-27 Sunds Defibrator Industries Ab Procede et dispositif de traitement d'une matiere fibreuse

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3843065A (en) * 1972-10-13 1974-10-22 Bauer Bros Co Labyrinth seal ring for pulp refiner
US3889890A (en) * 1974-01-21 1975-06-17 Bauer Bros Co Refiner disc
US4191338A (en) * 1977-06-03 1980-03-04 The Bauer Bros. Co. Infeed disc for disc-type refiners
DE3712042A1 (de) * 1987-04-09 1988-10-27 Schnell Maschfab Karl Zerkleinerungsmaschine, insbesondere fuer knochen, fleisch u. dgl.
WO1998036836A1 (fr) * 1997-02-25 1998-08-27 Sunds Defibrator Industries Ab Procede et dispositif de traitement d'une matiere fibreuse

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2726669A1 (fr) * 2011-07-01 2014-05-07 Metso Paper Sweden AB Vis sans fin d'alimentation, dispositif à vis sans fin d'alimentation, et broyeur pour substance lignocellulosique
EP2726669A4 (fr) * 2011-07-01 2015-04-08 Valmet Aktiebolag Vis sans fin d'alimentation, dispositif à vis sans fin d'alimentation, et broyeur pour substance lignocellulosique

Also Published As

Publication number Publication date
SE0801030L (sv) 2009-11-09
SE532411C2 (sv) 2010-01-12
WO2009136849A9 (fr) 2010-03-25

Similar Documents

Publication Publication Date Title
RU2431007C2 (ru) Рафинер
SE530995C2 (sv) Raffineringsplåt av hög intensitet med inre defibrerande zon
FI64819B (fi) Skruvtransportoer med stoppartappar
AU715158B2 (en) Method and device for treatment of fibrous material
WO2009136849A1 (fr) Dispositif d’alimentation coaxial à filetages ayant une partie supérieure
EP2960367B1 (fr) Raffineur à disque unique
US6267847B1 (en) Pulper for a stock preparation system
EP0958057B1 (fr) Une paire d'organes de broyage cooperants pour un appareil de broyage a disques
FI65288B (fi) Anordning vid malapparater lignocellulosahaltigt material
EP1871949B1 (fr) Logement de disques
CN113518665A (zh) 具有供给凹槽的磨盘段
RU2201065C2 (ru) Приемная часть осевого сепаратора
US9528222B2 (en) Feed screw arrangement
NO313595B1 (no) Mateelement for fibermateriale
AU721787B2 (en) Feeding device for fibrous material
EP2823098A1 (fr) Appareil de fabrication de pâte de fibre à partir de matériau contenant de la lignocellulose
US6602310B1 (en) Separator device with rotor having peripheral carriers for separating solid particles from a gas stream
FI85883B (fi) Konraffinoer.
WO2020091659A1 (fr) Système de sortie pour transporter une matière lignocellulosique broyée à partir d'un réservoir et réservoir comprenant un tel système de sortie

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09742931

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09742931

Country of ref document: EP

Kind code of ref document: A1