EP0867561B1 - Procédé et dispositif pour la production d'une pâte chaude, contenant essentiellement des fibres de papier - Google Patents

Procédé et dispositif pour la production d'une pâte chaude, contenant essentiellement des fibres de papier Download PDF

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Publication number
EP0867561B1
EP0867561B1 EP98101981A EP98101981A EP0867561B1 EP 0867561 B1 EP0867561 B1 EP 0867561B1 EP 98101981 A EP98101981 A EP 98101981A EP 98101981 A EP98101981 A EP 98101981A EP 0867561 B1 EP0867561 B1 EP 0867561B1
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EP
European Patent Office
Prior art keywords
rotor
pulverisation
heating
friable
vapour
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP98101981A
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German (de)
English (en)
Other versions
EP0867561A1 (fr
Inventor
Almut Kriebel
Erich Peters
Volker Niggl
Josef Schneid
Hans Schnell
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Voith Patent GmbH
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Voith Paper Patent GmbH
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-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
    • D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water

Definitions

  • the invention relates to a method for heating paper pulp according to the Preamble of claim 1.
  • Procedure of the above Kind are needed e.g. in preparation for one Dispersion process of pulp obtained from waste paper. It is known, that pulp by dispersing or a comparable mechanical / thermal treatment significantly improved in its properties can be.
  • a fibrous material is used, the one Has a dry content between 15 and 35% and brought to a temperature that is far above the ambient temperature. It makes sense that Make heating when the pulp is already its for dispersion has the required consistency. In this thickening process, a significant portion of the previously pressed water still present in the fibrous material, whereby firstly its Viscosity increases significantly and secondly less water needs to be heated. Thickening is often carried out in a screw press.
  • the fiber suspension is between one Screw conveyor and a perforated shell surrounding it, so that the Water leaks through the jacket.
  • the goal is to carry out the aforementioned process steps with a compact unit can be achieved even better if the highly consistent paper pulp is entered directly into the set of a disperser.
  • the fabric is then covered by the Seen the direction of the river, detected the first stage of the disperger, crushed and swirled, creating the fiber crumbs.
  • the material is then on the necessary temperature heated, due to the good grinding effect a relatively short heating-up time is sufficient.
  • the actual dispersion, i.e. Change of Material properties take place in the dispersion zone, which follows downstream.
  • FIG. 1 shows, with simplified technical features, in which Way the method according to the invention can basically run.
  • This graft has e.g. a fabric density between 15 and 20% and thus a certain strength.
  • this substance already has a temperature that is above the ambient level, e.g. between 30 and 40 ° C.
  • the plug 1 is in all figures shown circular cylindrical, but it can also have a different cross-sectional shape, for. B. exit ring-shaped from the thickening press 2.
  • the crushing step is performed by a rotor 3 against which the plug 1 is pressed on the Contact point removes the fiber crumbs.
  • the movement of the rotor as well as by Heating steam ST added via steam line 5 creates a strong swirl and mixing with the steam. Therefore, the crumb is heated up very quickly and can then the processing room 6 for further processing, e.g. Leave dispersion. So there is the crushing, the swirling and the Heating of the paper pulp takes place in a coherent work step.
  • the residence time of the fibrous material in the processing space 6 is defined as clearly as possible in other words: the transport process must be controlled. For this, when an even fluidized bed is formed, the mean residence time Throughput and volume of the processing space 6 can be determined.
  • FIG. 2 In other cases can - such as shown in Fig. 2 - an additional conveyor 9 is available be, which defines the contact time of the paper pulp with the heating steam.
  • Fig. 2 is also indicated that the supply of heating steam ST in the immediate vicinity of Shredding zone can take place, whereby the steam penetrates faster into the fabric. This also speeds up heating.
  • the steam jet becomes correspondingly sharp bundled, it can, under certain circumstances, condense to peel the Contribute material from the grafting.
  • the processing room is not shown here.
  • the downstream disperser 7 with the feed screw 8 can be seen schematically.
  • the supply of the paper pulp can advantageously at an angle a of about 45 ° against the vertical, as shown in FIG. 2. This results in an optimal one Trajectory of the material crumbs in the upper area of the processing space 6.
  • the rotors 3 size reduction elements 4 on their circumference have, such can also be attached to the end face of a varied rotor, such as Fig. 4 shows. Then on the shaft of the rotor 12 e.g. Paddle 10 for swirling attach the crumb.
  • Fig. 5 such a crushing tool is shown, which on the end face Crushing elements 4 and paddles 10 is provided on the shaft.
  • the peeled off Fibrous material is captured by the paddles 10 attached to the same rotor 12, in Swirled circumferentially and hurled into the area above the rotor 12.
  • the heating steam enters from below through a number of steam lines 5 ' the processing room 6. Since the paddle 10 here is essentially one Generate circumferential movement, the axial speed can be regulated separately, e.g. a separate screw conveyor above the effective range of the rotor 12 11 is attached, which firstly provides for the axial feed and secondly the sticking of fiber in the upper part of the processing space 6 prevented.
  • This principle whirling up the crumb material through the rotor 12 and 12 located below 6 shows the axial conveying through the above-lying screw conveyor 11 in a somewhat different view.
  • the advantage of such an arrangement is - as already mentioned - that Possibility, with a rotor, here the bottom, the fine crumb stuff like that whirl that he can very easily come into contact with the heating steam to thereby - if possible several times - to the upper part of the processing area get in, in which the separate and thus differently adjustable screw conveyor 11th rotates.
  • This can advantageously be a belt screw, the conveyor belt of the housing keeps free from baked-on fabric.
  • the rotor 12 can also be a paddle Containing screw conveyor, which is in engagement with the screw conveyor 11.
  • To the Control devices 20 can control the trajectory of the material crumbs here indicated, to be present.
  • FIG. 8 shows a particularly favorable embodiment of the method according to the invention using a device that can be used for this purpose.
  • the highly consistent paper pulp as plug 1 coming from the thickening press 2, pressed directly into the area of a disperser set.
  • the one shown here Version is a disperger set with radial material flow, with a stator 15 and a rotor 16.
  • an axial disperger or Kneaders are used.
  • the disperger 14 shown here is loaded radially on the inside, for which purpose a first comminution element 17 is attached in the center of the rotor 16, which e.g. wing-shaped or cross-shaped shredding bars can carry.
  • This here opposed plug 1 is, as already explained in earlier versions, peeled off or grated and thereby broken up into small crumbs.
  • Primary stator teeth 22 slow down the fabric and thereby extend its dwell time in the radially outside adjoining steam chamber 18.
  • This steam chamber 18 is essentially ring-shaped and does not contain any mechanical dispersion teeth. As is well known Dispersion causes teeth to move at relatively high speeds are moved close to each other and the fiber material in between subject to strong shear forces.
  • This function has a device for Implementation of the method according to the invention is only the radially further outside Steam room 18 adjoining dispersion zone 19. Inside the steam room So the material is not mechanically dispersed. If necessary, however, internals can be present which slow down the movement of the fabric or swirl it.

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

Claims (22)

  1. Procédé de fabrication d'une matière grumeleuse chaude, contenant principalement des fibres de papier, à partir d'une pâte à papier compactée, très consistante, qui se trouve sous la forme d'un bouchon (1) sorti d'une vis sans fin de déshydratation, qui transforme celui-ci, au cours d'une étape de fragmentation, en grumeaux de matière fibreuse, désagrège ces grumeaux de matière fibreuse et les mélange à un fluide de chauffage gazeux ou sous forme de vapeur,
    caractérisé en ce que la fragmentation, la désagrégation et le chauffage s'effectuent en une seule étape de travail, les moyens de fragmentation agissant sur le bouchon (1) sorti de la vis sans fin de déshydratation.
  2. Procédé selon la revendication 1, caractérisé en ce que les grumeaux de matière fibreuse ont une épaisseur maximale de 5 mm au plus.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que les grumeaux de matière fibreuse ont une étendue maximale en longueur de 30 mm au plus.
  4. Procédé selon la revendication 1, 2 ou 3, caractérisé en ce que les grumeaux de matière fibreuse se trouvent dans un état tourbillonnant pendant la majeure partie du temps de chauffage nécessaire.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que la fragmentation, la désagrégation et le chauffage ont lieu dans la même chambre.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'étape de fragmentation s'effectue avec des moyens mécaniques.
  7. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que l'étape de fragmentation s'effectue sous l'effet d'un jet de gaz ou de vapeur très resserré.
  8. Procédé selon les revendications 6 et 7, caractérisé en ce qu'au cours de l'étape de fragmentation, l'effet du jet très resserré est combiné avec celui des moyens mécaniques.
  9. Procédé selon la revendication 6, caractérisé en ce que la fragmentation, la désagrégation et le chauffage ont lieu dans un disperseur (14) et sont suivis d'une dispersion mise en oeuvre dans le même disperseur (14).
  10. Dispositif pour la mise en oeuvre du procédé selon l'une des revendications 1 à 6, comportant une chambre de traitement (6), dans laquelle se trouve au moins un outil de fragmentation déplaçable qui se trouve à proximité d'une ouverture d'entrée pour une matière très consistante à traiter, provenant d'une vis sans fin de déshydratation, sous la forme d'un bouchon (1), et qui est pourvu de racloirs ou de lames, comportant un dispositif d'amenée de vapeur dans la chambre de traitement (6) ainsi que des moyens de transport pour amener la matière grumeleuse produite vers une ouverture de sortie (13).
  11. Dispositif selon la revendication 10, caractérisé en ce que l'outil de fragmentation déplaçable est essentiellement constitué d'un rotor (3, 12) qui est pourvu d'éléments de fragmentation (4).
  12. Dispositif selon la revendication 1, caractérisé en ce que les éléments de fragmentation (4) sont disposés sur la surface périphérique du rotor (3).
  13. Dispositif selon la revendication 11, caractérisé en ce que les éléments de fragmentation (4) sont disposés sur la surface d'extrémité du rotor (12).
  14. Dispositif selon la revendication 13, caractérisé en ce que le rotor (12) porte sur sa tige une pluralité de palettes (10) qui sont déplaçables avec le rotor dans la direction périphérique.
  15. Disnositif selon la revendication 13 ou 14, caractérisé en ce qu'il est disposé à l'intérieur de la chambre de traitement (6) sensiblement parallèlement au rotor (12), une vis de transport sans fin (11) qui peut également être entraínée et qui assure, en coopération avec le rotor (12), le transport axial de la matière grumeleuse.
  16. Dispositif selon la revendication 15, caractérisé en ce que la vis sans fin de transport (11) nettoie la chambre de traitement (6).
  17. Dispositif selon la revendication 15, caractérisé en ce que la vis sans fin de transport (11) est disposée au-dessus du rotor (12).
  18. Dispositif selon la revendication 15, caractérisé en ce que la vis sans fin de transport (11) est disposée à côté du rotor (12).
  19. Dispositif selon les revendications 15, 16, 17 ou 18, caractérisé en ce que la vitesse de rotation de la vis sans fin de transport (11) est sensiblement inférieure à celle du rotor (12).
  20. Dispositif selon la revendication 10, caractérisé en ce que la chambre de traitement (6) est formée par un boítier sensiblement cylindrique dans lequel se trouve le rotor (12), le boítier cylindrique pouvant également être entraíné et le rotor présente, avec ses éléments se trouvant sur le pourtour extérieur, une distance de 10 mm au plus par rapport au côté intérieur inférieur du boítier.
  21. Dispositif pour la mise en oeuvre du procédé selon la revendication 9, comportant une chambre de traitement (6) qui se trouve entre le stator (15) et le rotor (16) d'une garniture de dispersion, dans lequel le bouchon (1), provenant d'une presse de déshydratation, est d'abord transporté dans la zone de fragmentation dans laquelle il est pressé contre le rotor (16) pourvu d'éléments de fragmentation (17), en aval se raccordant une chambre à vapeur (18) annulaire qui peut être alimentée, au moyen de conduites de vapeur (5"), en vapeur chaude (ST) et qui sert au chauffage de la matière grumeleuse formée dans la zone de fragmentation, et en ce que plus loin radialement à l'extérieur fait suite la zone de dispersion (19) proprement dite.
  22. Dispositif selon la revendication 21, caractérisé en ce que la zone de dispersion (19) contient plusieurs rangées de dents qui sont déplaçables les unes par rapport aux autres à une distance radiale de 3 mm au plus.
EP98101981A 1997-03-26 1998-02-05 Procédé et dispositif pour la production d'une pâte chaude, contenant essentiellement des fibres de papier Expired - Lifetime EP0867561B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19712651 1997-03-26
DE19712651A DE19712651A1 (de) 1997-03-26 1997-03-26 Verfahren und Vorrichtung zur Herstellung eines heißen, überwiegend Papierfasern enthaltenden Krümelstoffes

Publications (2)

Publication Number Publication Date
EP0867561A1 EP0867561A1 (fr) 1998-09-30
EP0867561B1 true EP0867561B1 (fr) 2002-07-31

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ID=7824651

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EP98101981A Expired - Lifetime EP0867561B1 (fr) 1997-03-26 1998-02-05 Procédé et dispositif pour la production d'une pâte chaude, contenant essentiellement des fibres de papier

Country Status (5)

Country Link
US (1) US6073865A (fr)
EP (1) EP0867561B1 (fr)
AT (1) ATE221593T1 (fr)
DE (2) DE19712651A1 (fr)
NO (1) NO314636B1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19712653C2 (de) 1997-03-26 2002-10-24 Voith Paper Fiber Systems Gmbh Verfahren und Vorrichtung zur Dispergierung eines Altpapierfaserstoffes
DE10102449C1 (de) 2001-01-19 2002-03-21 Voith Paper Patent Gmbh Vorrichtung zur Heiß-Dispergierung eines Papierfaserstoffes
US6673211B2 (en) * 2001-07-11 2004-01-06 Voith Paper Patent Gmbh Apparatus for loading fibers in a fiber suspension with calcium carbonate
WO2004009900A1 (fr) * 2002-07-19 2004-01-29 Andritz Inc. Pretraitement de copeaux a haut degre de defibrisation
DE102013226597A1 (de) * 2013-12-19 2015-06-25 Voith Patent Gmbh Disperger-Aufheizung

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1795603A (en) * 1928-03-08 1931-03-10 Bauer Bros Co Method of producing pulp
GB548271A (en) * 1941-03-31 1942-10-02 Cellulose Dev Corp Ltd An improved method and apparatus for expressing liquid from pulp
GB1052514A (fr) * 1963-03-11 1900-01-01
DE1761864A1 (de) * 1968-07-16 1971-09-02 Voith Gmbh J M Verfahren und Vorrichtung zum Rueckgewinnen von Fasermaterial aus gemischtem Altpapier
DE1806612C3 (de) * 1968-11-02 1974-02-14 Hombak Maschinenfabrik Kg, 6550 Bad Kreuznach Zerkleinerungsvorrichtung zur Herstellung von schüttfähigen Fasern
US3585924A (en) * 1969-03-10 1971-06-22 William J Nolan Apparatus for the removal of liquids from fibrous materials
US3661328A (en) * 1970-03-30 1972-05-09 Bauer Bros Co Pulp refining system and process
US3671019A (en) * 1970-12-10 1972-06-20 Rietz Mfg Co Apparatus for material fluffing
SE359332B (fr) * 1971-12-20 1973-08-27 Reinhall Rolf
US3765611A (en) * 1972-08-07 1973-10-16 Bauer Bros Co Refining process
US3847363A (en) * 1972-10-20 1974-11-12 Reinhall Rolf Device in grinding apparatus for vegetable or fibrous material
SE371657B (fr) * 1973-04-05 1974-11-25 Wallen & Co Ab Lennart
SE372299B (fr) * 1973-04-27 1974-12-16 Reinhall Rolf
SE434859B (sv) * 1975-06-30 1984-08-20 Kmw Ab Forfarande och anordning for kontinuerlig behandling av fibermassa
SE419659B (sv) * 1976-03-19 1981-08-17 Rolf Bertil Reinhall Sett och anordning for framstellning av fibermassa av fiberformigt lignocellulosahaltigt material
SE413601B (sv) * 1976-06-30 1980-06-09 American Defibrator Sett vid framstellning av fibermassa i en under angtryck staende malapparat samt anordning for genomforande av settet
SE413784B (sv) * 1976-08-06 1980-06-23 Isel Sa Sett och anordning for att utnyttja i defibreringszonen utvecklat verme for att minimera angforbrukningen vid framstellning av massa for fiberskivor
US4123489A (en) * 1977-05-17 1978-10-31 Flett Development Company Method for converting waste paper products into useful forms
US5035362A (en) * 1984-01-26 1991-07-30 Marian Mazurkiewicz Disintegration of wood
NO180241C (no) * 1994-12-14 1997-03-12 Kvaerner Hymac As Innretning for behandling av partikkelmasse
DE19523704C2 (de) * 1995-06-29 2000-08-10 Voith Sulzer Stoffaufbereitung Vorrichtung zur mechanischen Behandlung von hochkonsistentem Faserstoff

Also Published As

Publication number Publication date
NO314636B1 (no) 2003-04-22
NO981017L (no) 1998-09-28
US6073865A (en) 2000-06-13
EP0867561A1 (fr) 1998-09-30
NO981017D0 (no) 1998-03-09
DE19712651A1 (de) 1998-10-01
DE59804957D1 (de) 2002-09-05
ATE221593T1 (de) 2002-08-15

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