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EP0886001B1 - Procédé et appareil pour disperser une pulpe de fibres de papier - Google Patents

Procédé et appareil pour disperser une pulpe de fibres de papier Download PDF

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Publication number
EP0886001B1
EP0886001B1 EP98101955A EP98101955A EP0886001B1 EP 0886001 B1 EP0886001 B1 EP 0886001B1 EP 98101955 A EP98101955 A EP 98101955A EP 98101955 A EP98101955 A EP 98101955A EP 0886001 B1 EP0886001 B1 EP 0886001B1
Authority
EP
European Patent Office
Prior art keywords
rotor
teeth
dispersing
stator
fine
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
EP98101955A
Other languages
German (de)
English (en)
Other versions
EP0886001A1 (fr
Inventor
Almut Kriebel
Josef Schneid
Volker Niggl
Hans Schnell
Wolfgang Mannes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
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 Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0886001A1 publication Critical patent/EP0886001A1/fr
Application granted granted Critical
Publication of EP0886001B1 publication Critical patent/EP0886001B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/271—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/56—Mixing liquids with solids by introducing solids in liquids, e.g. dispersing or dissolving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
    • B01F33/8361—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating
    • B01F33/83612—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating by crushing or breaking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71775—Feed mechanisms characterised by the means for feeding the components to the mixer using helical screws
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/004—Methods of beating or refining including disperging or deflaking
    • D21D1/006—Disc mills
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F2025/91—Direction of flow or arrangement of feed and discharge openings
    • B01F2025/912—Radial flow
    • B01F2025/9121—Radial flow from the center to the circumference, i.e. centrifugal flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/47—Mixing of ingredients for making paper pulp, e.g. wood fibres or wood pulp
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/57—Mixing high-viscosity liquids with solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/271—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
    • B01F27/2711—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator provided with intermeshing elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis

Definitions

  • the invention relates to a method for dispersing paper pulp according to the Preamble of claim 1.
  • Procedure of the above Be e.g. needed to improve the quality of fiber, which was obtained from waste paper. It is known that pulp by Dispersing can be homogenized and thereby significantly improved. There in many cases a fiber material is used that has a dry content between 15 and has 35% and has been brought to a temperature far above that Ambient temperature. It makes sense to heat up when the Fibrous material already has the consistency required for dispersion. With this Thickening process becomes a considerable part of what was previously in the pulp Water depressed, which firstly makes its viscosity essential when dispersing increases and secondly less water needs to be heated. The most important Thickening machines are screw presses and screen presses.
  • the fibrous suspension is introduced and pressed between a screen and a roller or between two screens so that the water emerges. This creates a moist fibrous web.
  • this membrane has a weight per unit area of between 500 and 2000 g / m 2 , although values that differ from this can also be useful.
  • the wet web is removed from the area of the screen or screens and must then be torn into flat pieces. Although these can easily be brought to the desired temperature, a relatively long heating-up time is required. For example, warm-up times of several minutes have to be accepted, especially if a temperature above 90 ° C is desired.
  • the hot crumb is then fed to the disperser. The whole requires a fairly complex system.
  • the fiber suspension is between one Conveyor screw and a perforated jacket surrounding it, the Water leaks through the jacket.
  • Shredding can e.g. in a shredder screw or a system with counter rotating Rotors are made, which is very expensive.
  • a device is already known from WO 96/18769 A1, in which a device with "pulp" specified substance introduced into a screw conveyor and then in a Disk disperser is dispersed. To support the dispersion is in the Center of the disc disperser steam added. The fiber-vapor mixture then travels radially outwards from the center into the actual, between machining zone located on the disperger discs. The substance should be steam can be mixed and crushed and dispersed at the same time. With this known Device should only be able to heat the substance to a limited extent.
  • Claim 15 defines an apparatus for performing the method. Preferred embodiments are defined in the dependent claims.
  • the highly consistent paper pulp can either be used as a plug or in the form of a loose, just pre-shredded high consistency fabric directly into the clothing of one Dispergers can be entered.
  • the fabric is then seen from the direction of flow the first crushing stage of the disperser is detected, crushed and swirled, whereby the fine fiber crumbs arise.
  • the material is then cut to the necessary Temperature warmed up, due to the previous intensive comminution a relatively short heating-up time is sufficient
  • the actual dispersion i.e.
  • the material properties change in the dispersion zone, which changes connects downstream.
  • the version shown here is a disperger set with a radial flow of material, with a stator 2 and a rotor 4. In principle, could an axial disperger or kneader can also be used.
  • the Disperger 3 shown here is loaded radially inside, for which a first in the center of the rotor 4 Comminution element 5 is attached, which e.g. wing-shaped or cross-shaped Crushing strips 6 can carry.
  • the stopper 1 pressed here becomes peeled off or grated and thereby broken up into fine crumbs, but here are not drawn.
  • the vapor space 8 is essentially ring-shaped and does not contain any of the mechanical ones Dispersion teeth.
  • dispersion is brought about by the fact that Teeth are moved relatively close together at a relatively high speed and the fiber between them is subjected to strong shear forces. This function only has that which adjoins the steam chamber 8 radially further outside Dispersing zone 9. There are then high peripheral speeds of the dispersing teeth possible and advantageous, while those lying radially further inside Crushing bars 6 are slower and therefore the incoming stopper 1 shred gently. The substance is therefore not within the vapor space 8 mechanically dispersed. If necessary, internals 18 (FIG. 4) can be present be that slow down the movement of the circulating fabric and loosen the fabric. The will be explained later.
  • Heating steam ST is added via the steam pipes 11 brought into contact with the fiber. He is swirled in the steam room 8 or at least kept loosened so that it is well penetrated by the steam can.
  • the heating is essentially achieved by condensation of the steam, i.e. Steam is constantly replenished.
  • the make-up improves the swirl and the loosening of the fiber crumbs. After the dispersion, the dispersed falls Fibrous material S 'through outlet 13.
  • the vapor space 8 is light due to the plug 1 and the substance in the dispersion zone 9 to seal against the outside world.
  • the closure of the dispersion zone 9 is also advantageous by a throttle ring 10 because this controls the degree of filling of the set leaves.
  • a throttle ring 10 In connection with the invention is a high and uniform degree of filling particularly advantageous in the dispersion zone 9, because otherwise the outer diameter of the Disperger set should be chosen very large to the specific desired To be able to transfer work to the pulp.
  • a throttle ring is e.g. by DE 195 23 704 A1 is known.
  • the highly consistent paper pulp is not as compact Grafting, but pre-shredded into a more or less loose form Dispersing device is entered.
  • a pre-shredded material falls e.g. when the thickening has been carried out on a screen press, from which the Thickened paper pulp runs out as a wet web.
  • Crushing e.g. in a snail
  • the fabric becomes so wide pre-crushed that it can be conveyed in screw systems.
  • the pre-shredded material is then before entering the Disperger 3 '- as shown here in Fig. 3 - by a feed screw 16 detects and directly into the central inlet of the disperser 3 'performed.
  • This feed screw 16 can have a stuffing effect, that is but not necessary to carry out the method according to the invention. Much more it can also be designed as a band screw, which is only on the outside diameter has a helical band 17 and comparatively promotes. With Advantage, the fabric in it can already be preheated, possibly for what existing steam lines 11 'serve. Then the crushing step gentler on fibers and later heating to dispersion temperature is faster. If the fabric is relatively loosely fed into the central inlet of the disperser, it does not offer the support of a solid plug, as shown in Fig. 1. The However, fine comminution is possible because the material is less Radial speed has than the shredding bars 6, which on the Crushing element 5 are attached. Often the primary stator teeth 7 in addition to their slowing effect, they promote comminution.
  • the heating steam ST is added on radially outer edge of the steam chamber 8 and thus different than in Fig.1.
  • This is supposed to Countercurrent heating can be achieved, which of course is a corresponding Centrifugal field in the steam room 8 provided.
  • the steam swirls the crumb in the steam room additionally on. Similar considerations regarding the optimal dam addition locations are also in other configurations, e.g. to start according to FIG. 1.
  • Conceivable internals 18 and 18 'are 4 according to which the internals are anchored on the stator side.
  • Such Baffles 18, 18 ' can e.g. round, rounded or with baffle edges Be pens.
  • the inner row of the dispersing teeth 19 shown here belongs to the rotor.
  • the fabric passes between these dispersing teeth and is pressed through the dispersing zone 9. In other cases, it can be advantageous to radially outer the vapor space through a To complete the row of teeth belonging to the stator.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Paper (AREA)
  • Disintegrating Or Milling (AREA)

Claims (22)

  1. Procédé de dispersion d'une pâte à papier, qui part d'une pâte à papier (S) de consistance élevée, la transforme, au cours d'une étape de fragmentation en fins grumeaux de matière fibreuse, et ensuite la mélange avec un fluide de chauffage gazeux ou sous forme de vapeur et la chauffe, et la disperse dans une zone de dispersion (9), située entre le stator (2) et le rotor (4), d'un disperseur, caractérisé en ce que la pâte à papier (S) est amenée dans un état désagrégé, en ce qu'elle est mélangée au fluide de chauffage et chauffée dans une chambre à vapeur (8) de forme annulaire, en ce qu'elle est ensuite conduite dans la zone de dispersion (9) dans laquelle les grumeaux de matière fibreuse sont dispersés, et en ce que pour le brassage de la pâte à papier (S) avec le fluide de chauffage, pour le chauffage et pour la dispersion, on utilise le même dispositif.
  2. Procédé selon la revendication 1, caractérisé en ce que l'étape de fragmentation, la désagrégation, le chauffage et la dispersion sont exécutés entre le stator (2) et le rotor (4) d'un disperseur, le stator (2) et le rotor (4) étant pourvus chacun de rangées de dents concentriques, et les dents s'étendant axialement dans les interstices de la contre-garniture.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que les fins grumeaux de matière fibreuse ont une épaisseur maximale de 5 mm au plus.
  4. Procédé selon la revendication 1, 2 ou 3, caractérisé en ce que les fins grumeaux de matière fibreuse ont une longueur maximale de 10 mm au plus.
  5. Procédé selon la revendication 1, 2, 3 ou 4, caractérisé en ce que les fins grumeaux de matière fibreuse sont mis en tourbillonnement dans le fluide de chauffage et, au moins pendant la majeure partie du temps de chauffage nécessaire, ils se trouvent dans l'état de tourbillonnement.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que le temps de séjour moyen des fins grumeaux de matière fibreuse dans la chambre à vapeur (8) est compris entre 0,5 et 3 secondes.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que le fluide de chauffage est de la vapeur chaude (ST) et est ajoutée dans la zone radialement extérieure de la chambre à vapeur (8).
  8. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que le fluide de chauffage est de la vapeur chaude (ST) et est ajouté dans la zone radialement intérieure de la chambre à vapeur (8).
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce que dans la chambre à vapeur (8) sont prévus des moyens qui freinent le mouvement des fins grumeaux de matière fibreuse se trouvant à l'intérieur.
  10. Procédé selon l'une des revendications précédentes, caractérisé en ce que le mouvement radial de la matière fibreuse est réduit dans la zone de dispersion (9).
  11. Procédé selon l'une des revendications précédentes, caractérisé en ce que la vitesse maximale de l'outil, qui déclenche l'étape de fragmentation, est comprise entre 10 et 30 m/s.
  12. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'étape de fragmentation est exécutée avec des moyens qui agissent directement sur les bouchons de matière qui sortent d'une vis sans fin de déshydratation.
  13. Procédé selon l'une des revendications 1 à 11, caractérisé en ce que l'étape de fragmentation est exécutée avec des moyens qui agissent sur des morceaux de matière fibreuse qui se sont formés par pré-fragmentation d'une bande de matière fibreuse humide, sortie d'une presse-tamis.
  14. Procédé selon l'une des revendications précédentes, caractérisé en ce que la matière fibreuse de consistance élevée est chauffée aussi avant l'étape de fragmentation.
  15. Dispositif pour la mise en oeuvre du procédé selon l'une des revendications précédentes, comportant une garniture de disperseur, qui comprend au moins un stator fixe (2) et au moins un rotor tournant (4), dans lequel, dans une zone de dispersion (9), plusieurs rangées de dents sont déplaçables les unes par rapport aux autres à une distance de 3 mm au plus, le rotor (4) contenant un outil de fragmentation qui se trouve à proximité de l'ouverture d'entrée de la matière fibreuse (S) de consistance élevée, à disperser, caractérisé en ce que l'outil de fragmentation est pourvu de racleurs ou de couteaux, et en ce qu'en aval se raccorde une chambre à vapeur (8) de forme annulaire qui sert à chauffer les fins grumeaux de matière formés dans la zone de fragmentation, et en ce que la zone de dispersion (9) suit plus loin radialement vers l'extérieur.
  16. Dispositif selon la revendication 15, caractérisé en ce que la chambre à vapeur (8) est limitée en amont par une rangée de dents de stator, les dents de stator primaires (7) correspondantes s'étendant jusqu'au rotor, à l'exception d'une fente de 3 mm au plus.
  17. Dispositif selon la revendication 16, caractérisé en ce que les dents de stator primaires (7) ont un écartement de 50 mm au moins dans la direction périphérique.
  18. Dispositif selon la revendication 15, 16 ou 17, caractérisé en ce que la chambre à vapeur (8) est limitée en aval par une rangée de dents de rotor, les dents de rotor primaires (7) correspondantes s'étendant jusqu'au rotor, à l'exception d'une fente de 3 mm au plus.
  19. Dispositif selon la revendication 15, 16, 17 ou 18, caractérisé en ce que la chambre à vapeur (8) est reliée à un conduit d'amenée de vapeur, par des tubes de vapeur (11).
  20. Dispositif selon la revendication 15, 16, 17, 18 ou 19, caractérisé en ce que la zone de dispersion (9) est fermée radialement vers l'extérieur par un organe d'étranglement qui permet de régler la section d'écoulement.
  21. Dispositif selon la revendication 20, caractérisé en ce que l'organe d'étranglement est formé par une bague d'étranglement pourvue d'ouvertures, le réglage pouvant s'effectuer par rotation de la bague d'étranglement (10).
  22. Dispositif selon 1a revendication 20, caractérisé en ce que l'organe d'étranglement est formé par une bague d'étranglement (10), le réglage pouvant s'effectuer par coulissement axial de la bague d'étranglement (10).
EP98101955A 1997-03-26 1998-02-05 Procédé et appareil pour disperser une pulpe de fibres de papier Expired - Lifetime EP0886001B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19712653 1997-03-26
DE19712653A DE19712653C2 (de) 1997-03-26 1997-03-26 Verfahren und Vorrichtung zur Dispergierung eines Altpapierfaserstoffes

Publications (2)

Publication Number Publication Date
EP0886001A1 EP0886001A1 (fr) 1998-12-23
EP0886001B1 true EP0886001B1 (fr) 2002-07-03

Family

ID=7824653

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98101955A Expired - Lifetime EP0886001B1 (fr) 1997-03-26 1998-02-05 Procédé et appareil pour disperser une pulpe de fibres de papier

Country Status (5)

Country Link
US (2) US6250573B1 (fr)
EP (1) EP0886001B1 (fr)
AT (1) ATE220140T1 (fr)
DE (2) DE19712653C2 (fr)
NO (1) NO312683B1 (fr)

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DE10018262A1 (de) * 2000-04-13 2001-10-18 Voith Paper Patent Gmbh Verfahren zur Dispergierung eines Papierfaserstoffes sowie Anlage zur Durchführung des Verfahrens
DE10102449C1 (de) * 2001-01-19 2002-03-21 Voith Paper Patent Gmbh Vorrichtung zur Heiß-Dispergierung eines Papierfaserstoffes
WO2002089989A1 (fr) * 2001-05-07 2002-11-14 Epcon Co., Ltd. Dispositif de melangeage, concassage et pulverisation et procede de pulverisation de substances au moyen dudit procede
DE10219844C1 (de) 2002-05-03 2003-09-18 Voith Paper Patent Gmbh Verfahren zur Heissdispergierung eines Papierfaserstoffes
DE10219843C1 (de) * 2002-05-03 2003-08-21 Voith Paper Patent Gmbh Verfahren zur Dispergierung eines Papierfaserstoffes
RU2217470C1 (ru) * 2002-07-30 2003-11-27 Теляшев Эльшад Гумерович Дезинтегратор
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US8500048B2 (en) * 2008-07-14 2013-08-06 Cake Energy, Llc Process and apparatus for drying and powderizing material
KR100942504B1 (ko) 2008-07-30 2010-02-12 이광원 음식물 쓰레기 분쇄장치
CA2735213A1 (fr) * 2008-08-27 2010-03-04 Adriano Galvez, Iii Materiel et methodes de conversion de biomasse en biocarburant
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JP5727273B2 (ja) * 2011-03-28 2015-06-03 株式会社Ｍｇグローアップ 混合撹拌装置
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ATE220140T1 (de) 2002-07-15
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DE19712653C2 (de) 2002-10-24
US20010015389A1 (en) 2001-08-23
US6250573B1 (en) 2001-06-26
DE59804634D1 (de) 2002-08-08
US6634583B2 (en) 2003-10-21
DE19712653A1 (de) 1998-10-01
NO981018D0 (no) 1998-03-09
NO981018L (no) 1998-09-28

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