EP1147805A1 - Process to disperse a paper fibers slurry and plant for using the process - Google Patents

Process to disperse a paper fibers slurry and plant for using the process Download PDF

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Publication number
EP1147805A1
EP1147805A1 EP01103044A EP01103044A EP1147805A1 EP 1147805 A1 EP1147805 A1 EP 1147805A1 EP 01103044 A EP01103044 A EP 01103044A EP 01103044 A EP01103044 A EP 01103044A EP 1147805 A1 EP1147805 A1 EP 1147805A1
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EP
European Patent Office
Prior art keywords
highly consistent
flails
flail roller
pieces
fibrous material
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.)
Granted
Application number
EP01103044A
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German (de)
French (fr)
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EP1147805B1 (en
Inventor
Almut Kriebel
Volker Niggl
Erich Peters
Roland Rauch
Josef Schneid
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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
    • 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
    • D21B1/30—Defibrating by other means
    • 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
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/83—Mixing plants specially adapted for mixing in combination with disintegrating operations
    • B01F33/831—Devices with consecutive working receptacles, e.g. with two intermeshing tools in one of the receptacles
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1121—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades pin-shaped
    • 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. used to improve the quality of fiber, which was obtained from waste paper. It is known that pulp by Dispersing homogenized and can thus be significantly improved. This will a high-consistency fibrous material that has a dry content between 15 and 35%. In many cases it is dispersed at a temperature that is well above the ambient temperature. Disperger sets with which processes of this type are compact and have an excellent dispersing effect. However, they require an even material flow. Since the dwell time of the Substance between them is very short, irregularities cannot be balanced. The result would be an uneven dispersion.
  • a particularly economical machine for thickening is the screw press.
  • the fiber suspension is between a screw conveyor and a perforated jacket surrounding it, wherein the water comes out through the holes in the jacket.
  • the resulting compact or Grafting is squeezed out of the snail and breaks into pieces. The sections are relatively large and therefore lead to an uneven flow subsequent apparatus.
  • a dispersing device in which the from a Screws originating from the screw press are fed directly. He is in one Shredding tool with scrapers or knives, which are in the Disperger inflow are.
  • the invention used drumstick takes the compressed by the squeezing of water Pieces of graft on and cut them up, especially since the circumferential beater with the interact with baffles fixed on the circumference. Larger chunks remain longer in the processing area until they can pass, so that the material flow to the Disperger becomes very even. It is then in the radially inner area of the Disperger sets further crushed and swirled, whereby very fine fiber crumbs arise.
  • steam is fed into a downstream one following heating zone of the clothing to bring the fabric to the necessary temperature to heat up. As a result of the previous shredding, a relatively short one is sufficient Heating time off.
  • the actual dispersion i.e. Change in material properties takes place in the dispersing zone of the sets, which follows downstream.
  • Fig. 1 shows sections of a system that is used to implement the invention The method is particularly suitable. You can see that in the upper part of the picture Screw press 8, in which a large part of the water-containing paper pulp S1 of the water W is squeezed out. This makes a compact, highly consistent Fibrous material S2 is produced, which breaks off in large pieces at the end of the press section and through a short chute 10 into the distribution device 9 below falls down.
  • the flail roller 1 works on the Periphery, that is fixed to the housing of the distributor 9 Impact pieces 3 together, so that the effect already described can occur.
  • Such impact pieces can, as drawn here, rod-shaped with radial alignment be or e.g.
  • the funnel passes through a drop funnel 11 thus treated highly consistent fibrous material S3 in a screw conveyor 7, which immediately before Disperger 4 is installed.
  • This screw conveyor 7 drives the fibrous material S3 into the central area of the disperger 4 so that it is between the disperger sets 5 and 6 arrives and is dispersed.
  • the gamituren have concentric axial interlocking rows of teeth that move past each other at a short distance become. The rotor and stator are therefore not pressed against each other.
  • Such Disperger sets are particularly effective, but require uniform ones Dispersing a material flow that is as uniform as possible.
  • the substance is brought to a higher temperature for dispersion, for which purpose a steam feed 12 is present.
  • this steam feed 12 becomes hot water vapor D in the space between the two disperser sets fed.
  • This is expediently carried out in an annular heating zone 13, which is is located radially within the actual dispersion area 14 of the sets.
  • the interlocking rows of teeth act in such a way that in the the highly consistent paper pulp is known to be dispersed. After that the dispersed paper pulp S4 emerges from the disperser through a bottom opening out.
  • Fig. 2 illustrates the arrangement of the to carry out the method used devices in a different view, and looking towards the Disperger 4.
  • Distribution device 9 is not only an optimal distribution of the Screw press 8 obtained material, but also the advantage of a space-saving arrangement achieved. If the process is carried out on an industrial scale namely, because of the relatively large quantities, a screw press 8 with a relatively large one Shaft diameters can be selected. The one at the end of the worm shaft Fibrous material is not flowable and should therefore be essentially freely vertical can fall down.
  • the position of the distribution device 9 in the manner shown enables the accumulating over the entire diameter of the screw press 8 Capture fiber and after appropriate treatment in the underlying Derive chute 10. It is therefore favorable to use the flail roller 1 at a right angle to be arranged to the main conveying direction of the screw press 8. That unity Worm shaft and distribution device 9 can then relative to the Disperger 4 depending Space should be arranged appropriately.
  • the basic structure of the distribution device 9 with the flail roller 1 is shown in FIG Fig. 3.
  • the flail roller 1 with length L contains a number of flails 2, the circumscribe the extremities on a circle with a diameter D. You work with them impact pieces 3 fastened together on the housing 15 of this device. This will achieved that the incoming coarse paper pulp initially shredded becomes. The shredding takes place with relatively little force, which is what is to be attributed to the fact that the paper pulp obtained here is only compressed and that the only thing that matters is to dissolve this network again. This is not comparable e.g. with the waste paper present in moist webs, e.g. in a pulper is processed.
  • the distances a are expediently between axially adjacent fixed impact pieces 3 selected so that the highly consistent Fibrous material S2 is calibrated in between, so that too little is passed broken pieces of cloth is prevented.
  • the particles passed through then have in a direction of extension a defined maximum dimension of e.g. 30 mm. Possibly must the distance a can be determined by a simple experiment. It could also be from Be advantageous to make it changeable so that the machine can work on different Requirements can be matched.
  • the axial distance b between them encountering flails 2 and impact pieces 3 has a strong influence on the Shredding effect of this device. It is advantageously between 5 and 20 mm.
  • the shape of the flail 2 or baffle 3 is appropriate to choose.

Abstract

The disperse a paper fiber material is prepared with water, and compressed into a high consistency material (S2) with coarse fragments, to be fed into the working zone of a rotating roller (1) fitted with sticks (2) before dispersion. They act with static peripheral beating units (3), to loosen and homogenize the high consistency paper fiber material. An Independent claim is also included for a paper fiber dispersion assembly with a distribution stage (9) having at least one rotating roller fitted with sticks. It has a number of peripheral beating units projecting inwards from the housing wall, to give an axial gap between them and the rotating sticks of 5-50 mm.

Description

Die Erfindung betrifft ein Verfahren zur Dispergierung von Papierfaserstoff gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a method for dispersing paper pulp according to the Preamble of claim 1.

Verfahren der o.g. Art werden z.B. zur Qualitätsverbesserung von Faserstoff eingesetzt, der aus Altpapier gewonnen wurde. Es ist bekannt, dass Papierfaserstoff durch Dispergieren homogenisiert und dadurch wesentlich verbessert werden kann. Dazu wird ein hochkonsistenter Faserstoff hergestellt, der einen Trockengehalt zwischen 15 und 35 % aufweist. In vielen Fällen wird bei einer Temperatur dispergiert, die weit über der Umgebungstemperatur liegt. Dispergergarnituren, mit denen Verfahren dieser Art durchgeführt werden, sind kompakt und haben eine ausgezeichnete Dispergierwirkung. Sie setzen allerdings einen gleichmäßigen Stoffstrom voraus. Da die Verweilzeit des Stoffes zwischen ihnen nur sehr kurz ist, können Ungleichmäßigkeiten nicht ausgeglichen werden. Die Folge wäre eine ungleichmäßige Dispergierung.Procedure of the above Be e.g. used to improve the quality of fiber, which was obtained from waste paper. It is known that pulp by Dispersing homogenized and can thus be significantly improved. This will a high-consistency fibrous material that has a dry content between 15 and 35%. In many cases it is dispersed at a temperature that is well above the ambient temperature. Disperger sets with which processes of this type are compact and have an excellent dispersing effect. However, they require an even material flow. Since the dwell time of the Substance between them is very short, irregularities cannot be balanced. The result would be an uneven dispersion.

Bei dem durchgeführten Eindickprozess wird ein beträchtlicher Teil des vorher noch im Faserstoff vorhandenen Wassers ausgepresst, wodurch erstens seine Viskosität bei der Dispergierung wesentlich ansteigt und zweitens gegebenenfalls weniger Wasser mit erwärmt werden muss. Eine besonders wirtschaftliche Maschine für die Eindickung ist die Schneckenpresse. Bei einer Schneckenpresse wird die Faserstoffsuspension zwischen einer Förderschnecke und einem diese umgebenden gelochten Mantel ausgepresst, wobei das Wasser durch die Löcher des Mantels austritt. Der dabei entstehende Pressling oder Pfropfen wird aus der Schnecke ausgedrückt und zerbricht in Teilstücke. Die Teilstücke sind relativ groß und führen daher zu einem ungleichmäßigen Mengenstrom durch nachfolgende Apparate. During the thickening process, a considerable part of the previously Fibrous water squeezed out, which firstly its viscosity at the Dispersion increases significantly and secondly less water if necessary must be heated. A particularly economical machine for thickening is the screw press. In a screw press, the fiber suspension is between a screw conveyor and a perforated jacket surrounding it, wherein the water comes out through the holes in the jacket. The resulting compact or Grafting is squeezed out of the snail and breaks into pieces. The sections are relatively large and therefore lead to an uneven flow subsequent apparatus.

Aus der DE 197 12 653 A1 ist eine Dispergiervorrichtung bekannt, in die der aus einer Schneckenpresse stammende Pfropfen direkt eingespeist wird. Dabei wird er in einem Zerkleinerungswerkzeug mit Schabern oder Messern zerrieben, die sich im Dispergerzulauf befinden.From DE 197 12 653 A1 a dispersing device is known, in which the from a Screws originating from the screw press are fed directly. He is in one Shredding tool with scrapers or knives, which are in the Disperger inflow are.

Es ist Aufgabe der Erfindung, eine Vorrichtung zu schaffen, mit der es gelingt, den aus der Schneckenpresse kommenden hochkonsistenten Pfropfen so der Dispergierung zuzuführen, dass eine besonders gleichmäßige Dispergierung bei hoher Betriebssicherheit gewährleistet ist.It is an object of the invention to provide a device with which it is possible the highly consistent plugs of the screw press thus dispersing that a particularly uniform dispersion at high Operational safety is guaranteed.

Diese Aufgabe wird durch die im Kennzeichen des Anspruchs 1 genannten Merkmale vollständig gelöst.This object is achieved by the features mentioned in the characterizing part of claim 1 completely solved.

Mit Hilfe des neuen Verfahrens ist es möglich, einen Hochkonsistenzstoff herzustellen, der sich einwandfrei in einem Disperger bearbeiten lässt. Die erfindungsgemäß verwendete Schlegelwalze nimmt die durch das Abpressen von Wasser komprimierten Pfropfenstücke auf und zerteilt sie, insbesondere da die umlaufenden Schlegel mit den am Umfang feststehenden Prallstücken zusammenwirken. Größere Brocken verbleiben länger im Bearbeitungsbereich, bis sie passieren können, so dass der Stofffluss zum Disperger sehr gleichmäßig wird. Er wird dann im radial inneren Bereich der Dispergergamituren weiter zerkleinert und verwirbelt, wobei sehr feine Faserkrümel entstehen. Falls gewünscht, erfolgt die Einspeisung von Dampf in eine stromabwärts folgende Aufheizzone der Garnituren, um den Stoff auf die notwendige Temperatur aufzuheizen. Dabei reicht infolge der vorangegangenen Zerkleinerung eine relativ kurze Aufheizzeit aus. Die eigentliche Dispergierung, d.h. Veränderung der Stoffeigenschaften erfolgt in der Dispergierzone der Garnituren, die sich stromabwärts anschließt.With the help of the new process it is possible to produce a high consistency substance that can be processed perfectly in a disperger. The invention used drumstick takes the compressed by the squeezing of water Pieces of graft on and cut them up, especially since the circumferential beater with the interact with baffles fixed on the circumference. Larger chunks remain longer in the processing area until they can pass, so that the material flow to the Disperger becomes very even. It is then in the radially inner area of the Disperger sets further crushed and swirled, whereby very fine fiber crumbs arise. If desired, steam is fed into a downstream one following heating zone of the clothing to bring the fabric to the necessary temperature to heat up. As a result of the previous shredding, a relatively short one is sufficient Heating time off. The actual dispersion, i.e. Change in material properties takes place in the dispersing zone of the sets, which follows downstream.

Die Erfindung und ihre Vorteile werden erläutert an Hand von Zeichnungen. Dabei zeigen:

Fig. 1
schematisch: Anlage zur Durchführung des erfindungsgemäßen Verfahrens;
Fig. 2
eine andere Ansicht einer ähnlichen Anlage;
Fig. 3
schematisch: erfindungsgemäße Verteilvorrichtung.
The invention and its advantages are explained with reference to drawings. Show:
Fig. 1
schematically: plant for carrying out the method according to the invention;
Fig. 2
another view of a similar plant;
Fig. 3
schematically: distribution device according to the invention.

Die Fig. 1 zeigt Ausschnitte einer Anlage, die zur Durchführung des erfindungsgemäßen Verfahrens besonders gut geeignet ist. Man erkennt im oberen Teil des Bildes die Schneckenpresse 8, in der aus dem wasserhaltigen Papierfaserstoff S1 ein großer Teil des Wassers W ausgepresst wird. Dadurch wird ein kompaktierter hochkonsistenter Faserstoff S2 erzeugt, der in großen Stücken am Ende der Pressstrecke abbricht und durch einen kurzen Fallschacht 10 in die darunter befindliche Verteilvorrichtung 9 herabfällt. Diese enthält als wesentliches Bauteil eine Schlegelwalze 1 mit daran befestigten umlaufend bewegten Schlegeln 2. Die Schlegelwalze 1 arbeitet mit an der Peripherie, also am Gehäuse der Verteilvorrichtung 9 angebrachten feststehenden Prallstücken 3 zusammen, so dass die bereits beschriebene Wirkung eintreten kann. Solche Prallstücke können, wie hier gezeichnet, stabförmig mit radialer Ausrichtung sein oder z.B. auch kubisch oder plattenförmig. Durch einen Falltrichter 11 gelangt der so behandelte hochkonsistente Faserstoff S3 in eine Förderschnecke 7, die unmittelbar vor dem Disperger 4 installiert ist. Diese Förderschnecke 7 treibt den Faserstoff S3 in den zentralen Bereich des Dispergers 4, so dass er zwischen die Dispergergarnituren 5 und 6 gelangt und dispergiert wird. Die Gamituren weisen konzentrische axial ineinander greifende Zahnreihen auf, die in geringem Abstand aneinander vorbei bewegt werden. Rotor und Stator werden also nicht gegeneinander gepresst. Solche Dispergergarnituren sind besonders effektiv, benötigen aber zur gleichmäßigen Dispergierung einen möglichst gleichmäßigen Stoffstrom.Fig. 1 shows sections of a system that is used to implement the invention The method is particularly suitable. You can see that in the upper part of the picture Screw press 8, in which a large part of the water-containing paper pulp S1 of the water W is squeezed out. This makes a compact, highly consistent Fibrous material S2 is produced, which breaks off in large pieces at the end of the press section and through a short chute 10 into the distribution device 9 below falls down. This contains a flail roller 1 as an essential component attached rotating moving flails 2. The flail roller 1 works on the Periphery, that is fixed to the housing of the distributor 9 Impact pieces 3 together, so that the effect already described can occur. Such impact pieces can, as drawn here, rod-shaped with radial alignment be or e.g. also cubic or plate-shaped. The funnel passes through a drop funnel 11 thus treated highly consistent fibrous material S3 in a screw conveyor 7, which immediately before Disperger 4 is installed. This screw conveyor 7 drives the fibrous material S3 into the central area of the disperger 4 so that it is between the disperger sets 5 and 6 arrives and is dispersed. The gamituren have concentric axial interlocking rows of teeth that move past each other at a short distance become. The rotor and stator are therefore not pressed against each other. Such Disperger sets are particularly effective, but require uniform ones Dispersing a material flow that is as uniform as possible.

In vielen Fällen wird der Stoff zur Dispergierung auf eine höhere Temperatur gebracht, wozu hier eine Dampfeinspeisung 12 vorhanden ist. Mit Hilfe dieser Dampfeinspeisung 12 wird heißer Wasserdampf D in den Raum zwischen die beiden Dispergergarnituren eingespeist. Zweckmäßigerweise erfolgt das in einer ringförmigen Heizzone 13, die sich radial innerhalb des eigentlichen Dispergierbereiches 14 der Garnituren befindet. Im Dispergierbereich14 wirken die ineinandergreifenden Zahnreihen so, dass in der an sich bekannten Weise der hochkonsistente Papierfaserstoff dispergiert wird. Danach tritt der dispergierte Papierfaserstoff S4 aus dem Disperger durch eine Bodenöffnung aus.In many cases the substance is brought to a higher temperature for dispersion, for which purpose a steam feed 12 is present. With the help of this steam feed 12 becomes hot water vapor D in the space between the two disperser sets fed. This is expediently carried out in an annular heating zone 13, which is is located radially within the actual dispersion area 14 of the sets. in the Dispersing area14, the interlocking rows of teeth act in such a way that in the the highly consistent paper pulp is known to be dispersed. After that the dispersed paper pulp S4 emerges from the disperser through a bottom opening out.

Die Fig. 2 verdeutlicht die Anordnung der zur Durchführung des Verfahrens verwendeten Vorrichtungen in einer anderen Ansicht, und zwar mit Blickrichtung auf den Disperger 4. Durch Verwendung einer gemäß den Ansprüchen gebauten Verteilvorrichtung 9 wird nicht nur eine optimale Verteilung des an der Schneckenpresse 8 anfallenden Stoffes erreicht, sondern auch der Vorteil einer platzsparenden Anordnung erzielt. Bei industrieller Durchführung des Verfahrens muss nämlich wegen der relativ großen Mengen eine Schneckenpresse 8 mit relativ großem Wellendurchmesser gewählt werden. Der am Ende der Schneckenwelle anfallende Faserstoff ist nicht fließfähig und sollte daher im wesentlichen frei senkrecht herabfallen können. Die Lage der Verteilvorrichtung 9 in der gezeichneten Weise ermöglicht es , den über den ganzen Durchmesser der Schneckenpresse 8 anfallenden Faserstoff zu erfassen und nach entsprechender Behandlung in den darunterliegenden Fallschacht 10 abzuleiten. Es ist daher günstig, die Schlegelwalze 1 im rechten Winkel zur Hauptförderrichtung der Schneckenpresse 8 anzuordnen. Diese Einheit, also Schneckenwelle und Verteilvorrichtung 9, kann dann relativ zum Disperger 4 je nach Platzverhältnissen zweckmäßig angeordnet werden.Fig. 2 illustrates the arrangement of the to carry out the method used devices in a different view, and looking towards the Disperger 4. By using a built according to the claims Distribution device 9 is not only an optimal distribution of the Screw press 8 obtained material, but also the advantage of a space-saving arrangement achieved. If the process is carried out on an industrial scale namely, because of the relatively large quantities, a screw press 8 with a relatively large one Shaft diameters can be selected. The one at the end of the worm shaft Fibrous material is not flowable and should therefore be essentially freely vertical can fall down. The position of the distribution device 9 in the manner shown enables the accumulating over the entire diameter of the screw press 8 Capture fiber and after appropriate treatment in the underlying Derive chute 10. It is therefore favorable to use the flail roller 1 at a right angle to be arranged to the main conveying direction of the screw press 8. That unity Worm shaft and distribution device 9 can then relative to the Disperger 4 depending Space should be arranged appropriately.

Den grundsätzlichen Aufbau der Verteilvorrichtung 9 mit der Schlegelwalze 1 zeigt die Fig. 3. Die Schlegelwalze 1 mit Länge L enthält eine Anzahl von Schlegeln 2, deren äußerste Enden auf einem Kreis mit dem Durchmesser D umlaufen. Sie wirken mit den am Gehäuse 15 dieser Vorrichtung befestigten Prallstücken 3 zusammen. Dadurch wird erreicht, dass der ankommende grobstückige Papierfaserstoff zunächst zerkleinert wird. Die Zerkleinerung erfolgt schon mit relativ geringer Krafteinwirkung, was darauf zurückzuführen ist, dass der hier anfallende Papierfaserstoff lediglich komprimiert ist und dass es nur darauf ankommt, diesen Verbund wieder aufzulösen. Das ist nicht vergleichbar z.B. mit dem in feuchten Bahnen vorliegenden Altpapier, wie es z.B. in einem Stofflöser bearbeitet wird. Zweckmäßigerweise werden die Abstände a zwischen axial benachbarten feststehenden Prallstücken 3 so gewählt, dass der hochkonsistente Faserstoff S2 dazwischen kalibriert wird, dass also das Passieren von noch zu wenig zerteilten Stoffbrocken verhindert wird. Die durchgegangenen Teilchen haben dann in einer Erstreckungsrichtung ein definiertes Höchstmaß von z.B. 30 mm. Eventuell muss der Abstand a durch einen einfachen Versuch ermittelt werden. Es könnte auch von Vorteil sein, ihn veränderbar zu machen, so dass die Maschine auf unterschiedliche Anforderungen abgestimmt werden kann. Auch der axiale Abstand b zwischen sich begegnenden Schlegeln 2 und Prallstücken 3 hat einen starken Einfluss auf die Zerkleinerungswirkung dieser Vorrichtung. Er liegt mit Vorteil zwischen 5 und 20 mm.The basic structure of the distribution device 9 with the flail roller 1 is shown in FIG Fig. 3. The flail roller 1 with length L contains a number of flails 2, the circumscribe the extremities on a circle with a diameter D. You work with them impact pieces 3 fastened together on the housing 15 of this device. This will achieved that the incoming coarse paper pulp initially shredded becomes. The shredding takes place with relatively little force, which is what is to be attributed to the fact that the paper pulp obtained here is only compressed and that the only thing that matters is to dissolve this network again. This is not comparable e.g. with the waste paper present in moist webs, e.g. in a pulper is processed. The distances a are expediently between axially adjacent fixed impact pieces 3 selected so that the highly consistent Fibrous material S2 is calibrated in between, so that too little is passed broken pieces of cloth is prevented. The particles passed through then have in a direction of extension a defined maximum dimension of e.g. 30 mm. Possibly must the distance a can be determined by a simple experiment. It could also be from Be advantageous to make it changeable so that the machine can work on different Requirements can be matched. The axial distance b between them encountering flails 2 and impact pieces 3 has a strong influence on the Shredding effect of this device. It is advantageously between 5 and 20 mm.

Die Form der Schlegel 2 oder Prallstücke 3 ist zweckmäßig zu wählen. Hier sind recht einfache Formen dargestellt, um lediglich die Funktion zu zeigen. Sie können z.B. auch sichelförmig oder in Umfangsrichtung gesehen schräg gestellt sein. Es ist auch denkbar, sie mit verschleißfesten Aufpanzerungen zu versehen, um ihre Standzeiten zu verlängern.The shape of the flail 2 or baffle 3 is appropriate to choose. Here are right simple shapes shown to show only the function. You can e.g. also seen crescent or obliquely seen in the circumferential direction. It is also conceivable to provide them with wear-resistant armor to increase their service life extend.

Claims (19)

Verfahren zur Dispergierung von Papierfaserstoff mit folgenden Schritten: 1.1 Bereitstellung eines wasserhaltigen Papierfaserstoffes (S1); 1.2 Auspressen eines Teils des Wassers (W) zur Bildung eines hochkonsistenten grobstückigen Papierfaserstoffes (S2); 1.3 Fördern des hochkonsistenten Papierfaserstoffes in einen Disperger (4); 1.4 Dispergierung mit einem Disperger (2), der mindestens zwei Dispergergarnituren (5, 6) aufweist, welche jeweils mehrere ineinandergreifende Zahnreihen enthalten und die in einem Abstand relativ zueinander bewegt werden, wodurch der hochkonsistente Papierfaserstoff dispergiert wird, dadurch gekennzeichnet, dass
   1.5 der hochkonsistente grobstückige Faserstoff (S2) vor der Dispergierung in den Wirkungsbereich einer sich drehenden Schlegelwalze (1) gegeben wird, welche mit umlaufenden Schlegeln (2) versehen ist, die mit feststehenden peripheren Prallstücken (3) so zusammenwirken, dass eine Auflockerung und Vergleichmäßigung des hochkonsistenten Faserstoffs (S2) erfolgt.Process for dispersing pulp with the following steps: 1.1 provision of a water-containing paper pulp (S1); 1.2 Squeezing out part of the water (W) to form a highly consistent, coarse paper pulp (S2); 1.3 conveying the highly consistent paper pulp into a disperger (4); 1.4 dispersion with a disperser (2) which has at least two disperser sets (5, 6), each of which contains a plurality of interlocking rows of teeth and which are moved at a distance from one another, as a result of which the highly consistent paper pulp is dispersed, characterized in that
1.5 the high-consistency coarse pulp (S2) is placed in the effective area of a rotating flail roller (1), which is provided with revolving flails (2), which interact with fixed peripheral impact pieces (3) in such a way that loosening and equalization of the highly consistent fibrous material (S2). Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass die Schlegelwalze (1) im wesentlichen waagerecht angeordnet ist und dass der Stoff von oben in den Wirkungsbereich der Schlegelwalze (1) gelangt.Method according to claim 1,
characterized in that the flail roller (1) is arranged essentially horizontally and that the material reaches the effective area of the flail roller (1) from above. Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass das Auspressen des Wassers mit Hilfe einer Schneckenpresse (8) vorgenommen wird. The method of claim 1 or 2,
characterized in that the water is pressed out using a screw press (8). Verfahren nach Anspruch 3,
dadurch gekennzeichnet, dass die Förderrichtung der Schneckenpresse (8) waagerecht ist und dass die Mittellinie der Schlegelwalze (1) in einem rechten Winkel dazu und waagerecht liegt.Method according to claim 3,
characterized in that the conveying direction of the screw press (8) is horizontal and that the center line of the flail roller (1) is at a right angle to it and horizontally. Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass die Schlegel (2) mit einer Umfangsgeschwindigkeit zwischen 1 und 5 m/s bewegt werden.Method according to one of the preceding claims,
characterized in that the flails (2) are moved at a peripheral speed between 1 and 5 m / s. Verfahren nach Anspruch 5,
dadurch gekennzeichnet, dass die Schlegel (2) mit einer Umfangsgeschwindigkeit zwischen 2 und 4 m/s bewegt werden.Method according to claim 5,
characterized in that the flails (2) are moved at a peripheral speed between 2 and 4 m / s. Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass der hochkonsistente Faserstoff (S2) zwischen im Abstand (a) stehenden Prallstücken (3) kalibriert wird.Method according to one of the preceding claims,
characterized in that the highly consistent fibrous material (S2) is calibrated between baffle pieces (3) at a distance (a). Verfahren nach Anspruch 7,
dadurch gekennzeichnet, dass das Höchstmaß der kalibrierten Faserstoffstücke in einer Erstreckungsrichtung auf einen Wert zwischen 5 und 50 mm eingestellt wird.Method according to claim 7,
characterized in that the maximum dimension of the calibrated fiber pieces in an extension direction is set to a value between 5 and 50 mm. Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass mit der Schlegelwalze (1) eine spezifische Arbeit von weniger als 1 kWh/t auf den Faserstoff übertragen wird. Method according to one of the preceding claims,
characterized in that with the flail roller (1) a specific work of less than 1 kWh / t is transferred to the fibrous material. Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass der Faserstoff nach dem Passieren der Schlegelwalze (1) in eine Förderschnecke (7) fällt, die ihn zentral in den Disperger (4) einführt.Method according to one of the preceding claims,
characterized in that the fibrous material, after passing through the flail roller (1), falls into a screw conveyor (7) which introduces it centrally into the disperser (4). Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass der hochkonsistente Faserstoff (S3) durch zwischen die Dispergergamituren (5, 6) eingespeisten Wasserdampf (D) erhitzt wird.Method according to one of the preceding claims,
characterized in that the highly consistent fibrous material (S3) is heated by water vapor (D) fed between the disperser sets (5, 6). Anlage zur Durchführung des Verfahrens gemäß einem der voranstehenden Ansprüche mit einer Schneckenpresse (8) zur Erzeugung des hochkonsistenten grobstückigen Papierfaserstoffes (S2) einer sich anschließenden Verteilvorrichtung (9) sowie einem sich dieser anschließenden Disperger (4),
dadurch gekennzeichnet, dass die Verteilvorrichtung (9) mindestens eine sich drehende Schlegelwalze (1) enthält, auf der sich eine Anzahl von Schlegeln (2) befindet und dass die Verteilvorrichtung (9) eine Anzahl von Prallstücken (3)aufweist, die sich von der Innenwand ihres Gehäuses (15) im wesentlichen radial so nach innen erstrecken, dass sie in einem axialen Abstand (a) zu entsprechenden benachbarten Schlegeln (2) radial in deren Wirkungsbereich hineinragen.System for carrying out the method according to one of the preceding claims, with a screw press (8) for producing the highly consistent, coarse paper pulp (S2), a subsequent distribution device (9) and a disperger (4) following this,
characterized in that the distribution device (9) contains at least one rotating flail roller (1) on which there are a number of flails (2) and that the distribution device (9) has a number of impact pieces (3) which differ from the Extend the inner wall of their housing (15) essentially radially inwards such that they project radially into their effective area at an axial distance (a) from corresponding neighboring flails (2). Anlage nach Anspruch 12,
dadurch gekennzeichnet, dass die Schlegelwalze (1) im wesentlichen waagerecht liegt.System according to claim 12,
characterized in that the flail roller (1) lies essentially horizontally. Anlage nach Anspruch 12 oder 13,
dadurch gekennzeichnet, dass der äußerste Durchmesser(D) der Schlegel (2) zwischen 200 und 1000 mm groß ist. System according to claim 12 or 13,
characterized in that the outermost diameter (D) of the flail (2) is between 200 and 1000 mm in size. Anlage nach Anspruch 12, 13 oder 14,
dadurch gekennzeichnet, dass die Prallstücke (3) stabförmig sind.System according to claim 12, 13 or 14,
characterized in that the impact pieces (3) are rod-shaped. Anlage nach Anspruch 12, 13 oder 14,
dadurch gekennzeichnet, dass die Prallstücke (3) plattenförmig sind.System according to claim 12, 13 or 14,
characterized in that the impact pieces (3) are plate-shaped. Anlage nach Anspruch 12, 13, 14, 15 oder 16,
dadurch gekennzeichnet, dass der axiale Abstand (a) zwischen axial benachbarten Schlegeln (2) im Größenbereich zwischen 10 und 100 mm liegt.System according to claim 12, 13, 14, 15 or 16,
characterized in that the axial distance (a) between axially adjacent flails (2) is in the size range between 10 and 100 mm. Anlage nach Anspruch 12, 13, 14, 15, 16 oder 17,
dadurch gekennzeichnet, dass der axiale Abstand (b) zwischen sich begegnenden Schlegeln (2) und Prallstücken (3) im Größenbereich zwischen 5 und 50 mm liegt.System according to claim 12, 13, 14, 15, 16 or 17,
characterized in that the axial distance (b) between encountering beaters (2) and impact pieces (3) is in the size range between 5 and 50 mm. Anlage nach Anspruch 12, 13, 14, 15, 16, 17 oder 18,
dadurch gekennzeichnet, dass die Länge (L) der Schlegelwalze (1) mit einer Toleranz von ± 20 % dem Außendurchmesser der Pressschnecke in der Schneckenpresse (8) entspricht.System according to claim 12, 13, 14, 15, 16, 17 or 18,
characterized in that the length (L) of the flail roller (1) corresponds to the outside diameter of the press screw in the screw press (8) with a tolerance of ± 20%.
EP01103044A 2000-04-13 2001-02-09 Process to disperse a paper fibers slurry and plant for using the process Expired - Lifetime EP1147805B1 (en)

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EP2202052A1 (en) * 2008-12-29 2010-06-30 Andritz AG Method and device for dehydrating and dispersing a fibrous material
AT14115U1 (en) * 2013-04-12 2015-04-15 Valmet Technologies Inc dispersant
WO2015090685A1 (en) * 2013-12-19 2015-06-25 Voith Patent Gmbh Heating a disperser
EP4343056A1 (en) * 2022-09-21 2024-03-27 Valmet Technologies Oy Disperger

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EP1147805B1 (en) 2004-08-25
US20010037866A1 (en) 2001-11-08
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ATE274370T1 (en) 2004-09-15
DE50103371D1 (en) 2004-09-30

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