EP1147805B1 - 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
EP1147805B1
EP1147805B1 EP01103044A EP01103044A EP1147805B1 EP 1147805 B1 EP1147805 B1 EP 1147805B1 EP 01103044 A EP01103044 A EP 01103044A EP 01103044 A EP01103044 A EP 01103044A EP 1147805 B1 EP1147805 B1 EP 1147805B1
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EP
European Patent Office
Prior art keywords
fibrous material
roller
mallets
mallet
highly consistent
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
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EP01103044A
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German (de)
French (fr)
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EP1147805A1 (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
    • 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
    • B01F33/83—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
    • B01F23/57—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 can be homogenized and thereby significantly improved. This will a high-consistency fiber fabric 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 heat. As a result of the previous shredding, a relatively short one is sufficient Heating time off.
  • the actual dispersion i.e. Change in the properties of the fabric takes place in the dispersion zone of the sets, which follows downstream.
  • Fig. 1 shows sections of a system that is used to carry out the invention The method is particularly well suited. 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.
  • the flail roller 1 works on the Periphery, that is fixed to the housing of the distributor 9 Baffle 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 Dispergergamituren 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 uniformity Dispersion as even a material flow 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, with a view of the Disperger 4.
  • Distribution device 9 is not only an optimal distribution of the at 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 is not flowable and should therefore be essentially vertical can fall down.
  • the location of the distribution device 9 in the manner shown enables the accumulation over the entire diameter of the screw press 8 Detect 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 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 outer ends on a circle with a diameter D. You work with them baffle 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. This is not comparable e.g. with the waste paper present in moist webs, e.g. in a fabric dissolver 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.

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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)
  • Mixers Of The Rotary Stirring Type (AREA)

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 can be homogenized and thereby significantly improved. This will a high-consistency fiber fabric 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 which 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 heat. As a result of the previous shredding, a relatively short one is sufficient Heating time off. The actual dispersion, i.e. Change in the properties of the fabric takes place in the dispersion 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 performing 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 Dispergergamituren 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 Dispergergamituren sind besonders effektiv, benötigen aber zur gleichmäßigen Dispergierung einen möglichst gleichmäßigen Stoffstrom.Fig. 1 shows sections of a system that is used to carry out the invention The method is particularly well suited. 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. 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 Baffle 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 Dispergergamituren 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 uniformity Dispersion as even a material flow 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, with a view of the Disperger 4. By using a built according to the claims Distribution device 9 is not only an optimal distribution of the at 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 is not flowable and should therefore be essentially vertical can fall down. The location of the distribution device 9 in the manner shown enables the accumulation over the entire diameter of the screw press 8 Detect 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 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 outer ends on a circle with a diameter D. You work with them baffle 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. This is not comparable e.g. with the waste paper present in moist webs, e.g. in a fabric dissolver 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)

  1. Method for dispersing papermaking fibrous material, having the following steps:
    1.1 providing a water-containing papermaking fibrous material (S1);
    1.2 pressing-out of a portion of the water (W) in order to form a highly consistent lumpy papermaking fibrous material (S2);
    1.3 conveying the highly consistent papermaking fibrous material into a disperser (4);
    1.4 dispersing with a disperser (2) which has at least two disperser fittings (5, 6) which contain respectively a plurality of rows of teeth, which engage into each other, and which are moved relative to each other at a spacing, as a result of which the highly consistent papermaking fibrous material is dispersed,
    characterised in that
    1.5 the highly consistent lumpy fibrous material (S2) is brought before dispersion into the operating region of a rotating mallet roller (1) which is provided with circulating mallets (2) which cooperate with stationary peripheral impact parts (3) such that loosening and homogenisation of the highly consistent fibrous material (S2) is effected.
  2. Method according to claim 1,
    characterised in that
    the mallet roller (1) is disposed essentially horizontally, and in that the material passes from the top into the operating region of the mallet roller (1).
  3. Method according to claim 1 or 2,
    characterised in that
    the pressing-out of the water is undertaken by means of a screw press (8).
  4. Method according to claim 3,
    characterised in that
    the conveying direction of the screw press (8) is horizontal, and in that the central line of the mallet roller (1) is at right angles thereto and horizontal.
  5. Method according to one of the preceding claims,
    characterised in that
    the mallets (2) are moved at a circumferential speed between 1 and 5 m/s.
  6. Method according to claim 5,
    characterised in that
    the mallets (2) are moved at a circumferential speed between 2 and 4 m/s.
  7. Method according to one of the preceding claims,
    characterised in that
    the highly consistent fibrous material (S2) is calibrated between impact parts (3) which are at a spacing (a).
  8. Method according to claim 7,
    characterised in that
    the maximum dimension of the calibrated fibrous material pieces in one direction of extension is set to a value between 5 and 50 mm.
  9. Method according to one of the preceding claims,
    characterised in that
    a specific work of less than 1 kWh/t is transferred to the fibrous material by the mallet roller (1).
  10. Method according to one of the preceding claims,
    characterised in that
    the fibrous material, after passing the mallet roller (1), drops into a feed screw (7) which introduces it centrally into the disperser (4).
  11. Method according to one of the preceding claims,
    characterised in that
    the highly consistent fibrous material (S3) is heated by steam (D) which is fed between the disperser fittings (5, 6).
  12. Plant for implementation of the method according to one of the preceding claims, having a screw press (8) for producing the highly consistent lumpy papermaking fibrous material (S2) and also having a connected disperser (4),
    characterised in that
    a distributor device (9) is present between screw press (8) and disperser (4), which device contains at least one rotating mallet roller (1), on which a number of mallets (2) is located, and in that the distributor device (9) has a number of impact parts (3) which extend from the inner wall of its housing (15) essentially radially inwardly such that they protrude radially into the operating region of said mallets at an axial spacing (a) relative to corresponding adjacent mallets (2).
  13. Plant according to claim 12,
    characterised in that
    the mallet roller (1) is situated essentially horizontally.
  14. Plant according to claim 12 or 13,
    characterised in that
    the outermost diameter (D) of the mallets (2) is of a size between 200 and 1000 mm.
  15. Plant according to claim 12, 13 or 14,
    characterised in that
    the impact parts (3) are rod-shaped.
  16. Plant according to claim 12, 13 or 14,
    characterised in that
    the impact parts (3) are plate-shaped.
  17. Plant according to claim 12, 13, 14, 15 or 16,
    characterised in that
    the axial spacing (a) between axially adjacent mallets (2) is in the dimension range between 10 and 100 mm.
  18. Plant according to claim 12, 13, 14, 15, 16 or 17,
    characterised in that
    the axial spacing (b) between meeting mallets (2) and impact parts (3) is in the dimension range between 5 and 50 mm.
  19. Plant according to claim 12, 13, 14, 15, 16, 17 or 18,
    characterised in that
    the length (L) of the mallet roller (1) corresponds with a tolerance of ± 20% to the outer diameter of the press screw in the screw press (8).
EP01103044A 2000-04-13 2001-02-09 Process to disperse a paper fibers slurry and plant for using the process Expired - Lifetime EP1147805B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10018262A DE10018262A1 (en) 2000-04-13 2000-04-13 Process for dispersing a paper pulp and plant for carrying out the process
DE10018262 2000-04-13

Publications (2)

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EP1147805A1 EP1147805A1 (en) 2001-10-24
EP1147805B1 true EP1147805B1 (en) 2004-08-25

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US (1) US20010037866A1 (en)
EP (1) EP1147805B1 (en)
JP (1) JP2001348791A (en)
AT (1) ATE274370T1 (en)
CA (1) CA2344103A1 (en)
DE (2) DE10018262A1 (en)
ES (1) ES2225318T3 (en)

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FI111393B (en) * 2001-12-18 2003-07-15 Metso Paper Inc Wrecking system for a paper machine or similar
FI112875B (en) * 2001-12-18 2004-01-30 Metso Paper Inc Preliminary arrangements for a paper machine or equivalent
FI120551B (en) * 2001-12-19 2009-11-30 Metso Paper Inc Projection arrangement of a paper machine or equivalent
AT411604B (en) * 2002-03-27 2004-03-25 Andritz Ag Maschf METHOD AND DEVICE FOR DISPERSING A PAPER FIBER FIBER
CN100347374C (en) * 2005-08-30 2007-11-07 天津科技大学 Fibre detaching apparatus with high shearing
DE202006008820U1 (en) 2006-06-03 2006-08-17 Frymakoruma Ag Apparatus for dispersing and/or homogenizing liquids comprises processing unit comprising two independently rotating concentric toothed wheels driven on horizontal shafts
AT507837B1 (en) * 2008-12-29 2010-10-15 Andritz Ag Maschf METHOD AND DEVICE FOR DRAINING AND DISPERSING A FIBROUS MATERIAL
AT14115U1 (en) * 2013-04-12 2015-04-15 Valmet Technologies Inc dispersant
DE102013226597A1 (en) * 2013-12-19 2015-06-25 Voith Patent Gmbh Disperser-heating
CN110075746A (en) * 2019-04-23 2019-08-02 安徽华文塑胶科技有限公司 A kind of heavy metal-polluted soil stabilizer treatment system and processing method
CN111608000A (en) * 2020-05-26 2020-09-01 陈爱丽 Paper recycling device capable of introducing shredded paper once based on paper volume change
FI20225817A1 (en) * 2022-09-21 2024-03-22 Valmet Technologies Oy Disperger
CN115556265A (en) * 2022-10-10 2023-01-03 亨弗劳恩(江苏)复合材料研发有限公司 Chopped fiber dispersing device and dispersing method

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Also Published As

Publication number Publication date
CA2344103A1 (en) 2001-10-13
ES2225318T3 (en) 2005-03-16
JP2001348791A (en) 2001-12-21
EP1147805A1 (en) 2001-10-24
DE10018262A1 (en) 2001-10-18
US20010037866A1 (en) 2001-11-08
DE50103371D1 (en) 2004-09-30
ATE274370T1 (en) 2004-09-15

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