EP2683870B1 - Disperser - Google Patents

Disperser Download PDF

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Publication number
EP2683870B1
EP2683870B1 EP12708125.5A EP12708125A EP2683870B1 EP 2683870 B1 EP2683870 B1 EP 2683870B1 EP 12708125 A EP12708125 A EP 12708125A EP 2683870 B1 EP2683870 B1 EP 2683870B1
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Prior art keywords
teeth
tooth
elevations
treatment tool
treatment
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EP12708125.5A
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German (de)
French (fr)
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EP2683870A1 (en
Inventor
Bernd Kraft
Gerd Gottschalk
Oliver Lüdtke
Roland Rauch
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Voith Patent GmbH
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Voith Patent GmbH
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Priority to EP14161228.3A priority Critical patent/EP2757192A1/en
Publication of EP2683870A1 publication Critical patent/EP2683870A1/en
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    • 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
    • D21D1/004—Methods of beating or refining including disperging or deflaking
    • D21D1/006—Disc mills
    • D21D1/008—Discs

Definitions

  • the invention relates to a device for the mechanical treatment of high-consistency fibrous material with a housing, in which a first treatment tool and a second treatment tool is arranged, wherein the treatment tools each have a rotationally symmetrical shape, are arranged coaxially to each other, each in a plurality of annular, concentric to its center Having serially arranged teeth between which there are tooth gaps, which are flowed through radially by the fibrous material and between the rows of teeth there are annular gaps, which are arranged so that at least one row of teeth of a treatment tool extends into an annular space of the other, complementary treatment tool, such as for example DE 195 41 892 C1 known.
  • the object of the invention is therefore to improve the efficiency of the treatment with the lowest possible energy consumption.
  • the tooth spaces are largely flat and formed approximately at the level of the annular spaces between the rows of teeth.
  • the elevations and the teeth have a cross section in the radial direction, which is formed in a truncated pyramid. Accordingly, the teeth and protrusions have an outgoing from the respective annular space reason that leads over the radial edge to the head.
  • the flank angle i. the angle between the flanks of the teeth and the elevations with respect to the radials only differ by a maximum of 20 °, preferably be the same.
  • the tooth gaps a must ensure certain cross-sectional area for the flow of the pulp. If this cross-sectional area is too small, there is a risk of clogging and an increased energy requirement. Therefore, the distance between the edge of a tooth and the edge of the adjacent elevation in the radial direction should be between 1 and 5 mm, preferably between 2 and 3 mm. In addition, it is beneficial for the protection of the heads when the head of the teeth and the elevations is flat.
  • the tooth head should have a height between 10 and 40, preferably between 20 and 25 mm above the tooth base. Furthermore, it is advantageous if the width of the teeth and the elevations in the circumferential direction is approximately the same and is preferably between 1 and 10 mm, in particular between 2 and 5 mm.
  • the efficiency of the treatment can be further increased if teeth and / or elevations, preferably have radially extending grooves.
  • radially extending grooves are understood that extend at least with a directional component perpendicular to the circumferential direction of the treatment tool.
  • the pulp suspension flows through the gap between the treatment tools usually from the inside out. While the treatment tools move relative to each other, the radially extending grooves form additional working edges, which improves the dispersion, in particular the dirt dot comminution, the ink separation and the sticky comminution. In this way, the energy consumption and wear can be significantly reduced.
  • the groove extends over the entire tooth or the entire elevation or only over a part of the tooth or the elevation.
  • both treatment tools are formed by oppositely driven rotors or a treatment tool by a driven rotor and the second treatment tool is formed by a stationary stator.
  • the device is particularly suitable for dispersing the pulp, the high number of edges, in particular in the tooth spaces, significantly increasing the efficiency of the treatment.
  • the high-consistency paper pulp 1 is according to FIG. 1 directly in the central area of the Dispergergarnitur, which is formed by the two treatment tools 3,4, pressed. While a treatment tool 3 is stationary and thus designed as a stator, the other treatment tool 4 is rotatably mounted in the housing 2 of the disperser.
  • the Dispergergarnitur with the stator and the rotor is thus sent radially inward known dispersion is caused by the fact that teeth 6 with relatively high Speed are moved relatively close to each other and the fibrous material 1 therebetween is subjected to strong shear forces.
  • the pulp 1 can be previously heated by superheated steam. After dispersion, the dispersed pulp 1 falls down through the outlet 15.
  • the gap between them also changes, whereby the performance of the disperser can be controlled in a manner known per se.
  • the treatment tools 3,4 each have a rotationally symmetrical shape.
  • the coaxially arranged treatment tools 3,4 each have a plurality of annular, concentric to their center rows 5 arranged teeth 6, between which there are tooth gaps 7, which are flowed through by the pulp 1 radially outward. Between the rows of teeth 5 annular spaces 8 are provided, which are arranged so that at least one row of teeth 5 of a treatment tool 3,4 extends into an annular space 8 of the other, complementary treatment tool 4.3.
  • the flow through the tooth gaps 7 is hindered as far as it is conducive to the treatment of the pulp 1.
  • the angle 17 between the flanks 12 of the teeth 6 and the angle 18 between the flanks 19 of the elevations 9 is the same size.
  • the distance 20 between the edge 12 of a tooth 6 and the edge 19 of adjacent elevation 9 in the radial direction 14 between 2 and 3 mm.
  • the heads 13,21 of the teeth 6 and the elevations 9 are flat.
  • the height of the head 21 of the elevations 9 results as a function of the distance 20 between the flanks, the flank angle 18 and the minimum extent of the head 21 in the radial direction fourteenth ,
  • the width of the teeth 6 and the elevations 9 in the circumferential direction 16 is approximately equal and is between 2 and 5 mm.
  • grooves 10 preferably having a directional component in the radial direction 14 have. These grooves 10 may extend over the entire tooth 6 or the entire elevation 9 or only a part thereof. In this case, the partial extent, for example, exclusively via the head 13,21 or exclusively via a flank 12,19 done.

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  • Crushing And Grinding (AREA)
  • Paper (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur mechanischen Behandlung von hochkonsistentem Faserstoff mit einem Gehäuse, in welchem ein erstes Behandlungswerkzeug und ein zweites Behandlungswerkzeug angeordnet ist, wobei die Behandlungswerkzeuge jeweils eine rotationssymmetrische Form haben, koaxial zueinander angeordnet sind, jeweils in mehreren ringförmigen, zu ihrer Mitte konzentrischen Reihen angeordnete Zähne aufweisen, zwischen denen sich Zahnlücken befinden, die von dem Faserstoff radial durchströmt werden und zwischen den Zahnreihen ringförmige Zwischenräume vorhanden sind, die so angeordnet sind, dass zumindest eine Zahnreihe eines Behandlungswerkzeuges in einen ringförmigen Zwischenraum des anderen, komplementären Behandlungswerkzeuges hineinreicht, wie z.B. aus DE 195 41 892 C1 bekannt.The invention relates to a device for the mechanical treatment of high-consistency fibrous material with a housing, in which a first treatment tool and a second treatment tool is arranged, wherein the treatment tools each have a rotationally symmetrical shape, are arranged coaxially to each other, each in a plurality of annular, concentric to its center Having serially arranged teeth between which there are tooth gaps, which are flowed through radially by the fibrous material and between the rows of teeth there are annular gaps, which are arranged so that at least one row of teeth of a treatment tool extends into an annular space of the other, complementary treatment tool, such as for example DE 195 41 892 C1 known.

Durch die hohe Konsistenz, die der Faserstoff bei der Behandlung hat, ist eine intensive mechanische Bearbeitung bei derartigen Vorrichtungen (Entstipper, Disperger, Refiner) möglich, obwohl sich die relativ zueinander bewegbaren Behandlungswerkzeuge nicht berühren, sondern sich vielmehr in einem Abstand von ca. 1mm oder mehr aneinander vorbeibewegen. Dabei treten an den Zähnen ganz erhebliche Kräfte auf.
Vorrichtungen 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. Dabei wird in vielen Fällen ein Faserstoff verwendet, der einen Trockengehalt zwischen 15 und 35% aufweist und auf eine Temperatur gebracht worden ist, die weit über der Umgebungstemperatur liegt. Sinnvoll ist es, die Aufheizung dann vorzunehmen, wenn der Faserstoff bereits seine zur Dispergierung erforderliche Konsistenz hat.
Dabei kann jedoch oft das Ergebnis der Behandlung, insbesondere beim Dispergieren noch nicht befriedigen. Außerdem verschleißen die Behandlungswerkzeuge relativ schnell.Due to the high consistency, which has the pulp in the treatment, an intensive mechanical processing in such devices (Entstipper, Disperger, Refiner) is possible, although the relatively movable treatment tools do not touch, but rather at a distance of about 1mm or more past each other. Here are quite significant forces on the teeth.
Devices of the type mentioned above are z. B. used to improve the quality of pulp, which was obtained from waste paper.
It is known that paper pulp can be homogenized by dispersing and thereby significantly improved. In many cases, a pulp is used which has a dry content of between 15 and 35% and has been brought to a temperature which is far above the ambient temperature. It makes sense to carry out the heating when the pulp already has its consistency required for dispersion.
However, often the result of treatment, especially during Disperse does not satisfy. In addition, the treatment tools wear out relatively quickly.

Die Aufgabe der Erfindung ist es daher die Effizienz der Behandlung bei möglichst geringem Energiebedarf zu verbessern.The object of the invention is therefore to improve the efficiency of the treatment with the lowest possible energy consumption.

Erfindungsgemäß wurde die Aufgabe durch die Merkmale des Anspruchs 1 gelöst.According to the invention the object has been solved by the features of claim 1.

Üblicherweise sind die Zahnlücken weitestgehend eben und etwa auf Höhe der ringförmigen Zwischenräume zwischen den Zahnreihen ausgebildet.Usually, the tooth spaces are largely flat and formed approximately at the level of the annular spaces between the rows of teeth.

Durch die Erhebungen kann der Faserstoff nicht mehr radial ungehindert durch die Zahnlücken gelangen, was die Effizienz der Behandlung erheblich steigert. Daher ist es notwendig, dass alle Zahnlücken Erhebungen aufweisen, die über den Zahngrund hinausreichen.As a result of the elevations, the pulp can no longer pass radially unhindered through the tooth gaps, which considerably increases the efficiency of the treatment. Therefore, it is necessary that all gullets have projections that extend beyond the tooth bottom.

Für die Behandlung aber auch die Verschleißfestigkeit ist es notwendig, dass die Erhebungen und die Zähne einen Querschnitt in radialer Richtung aufweisen, der pyramidenstumpfförmig ausgebildet ist.
Dementsprechend haben die Zähne und Erhebungen einen von dem jeweiligen ringförmigen Zwischenraum ausgehenden Grund, der über die radial verlaufende Flanke zum Kopf führt.For the treatment but also the wear resistance, it is necessary that the elevations and the teeth have a cross section in the radial direction, which is formed in a truncated pyramid.
Accordingly, the teeth and protrusions have an outgoing from the respective annular space reason that leads over the radial edge to the head.

Um die optimierte Querschnittsform der Zähne möglichst vollständig auf die Erhebungen zu übertragen, sollte der Flankenwinkel, d.h. der Winkel zwischen den Flanken der Zähne und der Erhebungen bezüglich der Radialen nur um maximal 20 ° differieren, vorzugsweise gleich sein.In order to transfer the optimized cross-sectional shape of the teeth as completely as possible to the elevations, the flank angle, i. the angle between the flanks of the teeth and the elevations with respect to the radials only differ by a maximum of 20 °, preferably be the same.

Bei Versuchen hat sich des Weiteren herausgestellt, dass die Zahnlücken eine bestimmte Querschnittsfläche für die Durchströmung des Faserstoffes gewährleisten müssen. Ist diese Querschnittsfläche zu klein, so drohen ein Verstopfen und ein erhöhter Energiebedarf.
Daher sollte der Abstand zwischen der Flanke eines Zahnes und der Flanke der benachbarten Erhebung in radialer Richtung zwischen 1 und 5 mm, vorzugsweise zwischen 2 und 3 mm liegen.
Außerdem ist es zur Schonung der Köpfe von Vorteil, wenn der Kopf der Zähne und der Erhebungen eben ist.In experiments, it has also been found that the tooth gaps a must ensure certain cross-sectional area for the flow of the pulp. If this cross-sectional area is too small, there is a risk of clogging and an increased energy requirement.
Therefore, the distance between the edge of a tooth and the edge of the adjacent elevation in the radial direction should be between 1 and 5 mm, preferably between 2 and 3 mm.
In addition, it is beneficial for the protection of the heads when the head of the teeth and the elevations is flat.

Wegen der Hebelwirkung greift zusätzlich zu den Scherkräften am Zahnfuß ein hohes Moment an, das mit zunehmender Höhe stark zunimmt. Daher sollte der Zahnkopf eine Höhe zwischen 10 und 40, vorzugsweise zwischen 20 und 25 mm über dem Zahngrund aufweisen.
Des Weiteren ist es von Vorteil, wenn die Breite der Zähne und der Erhebungen in Umfangsrichtung etwa gleich ist und vorzugsweise zwischen 1 und 10 mm, insbesondere zwischen 2 und 5 mm liegt.Because of the leverage effect, in addition to the shear forces on the tooth root, a high moment increases, which increases greatly with increasing height. Therefore, the tooth head should have a height between 10 and 40, preferably between 20 and 25 mm above the tooth base.
Furthermore, it is advantageous if the width of the teeth and the elevations in the circumferential direction is approximately the same and is preferably between 1 and 10 mm, in particular between 2 and 5 mm.

Die Effizienz der Behandlung kann noch weiter gesteigert werden, wenn Zähne und/oder Erhebungen, vorzugsweise radial verlaufende Nuten besitzen.The efficiency of the treatment can be further increased if teeth and / or elevations, preferably have radially extending grooves.

Als radial verlaufend werden dabei Nuten verstanden, die zumindest mit einer Richtungskomponente senkrecht zur Umfangsrichtung des Behandlungswerkzeuges verlaufen.
Die Faserstoffsuspension durchströmt den Spalt zwischen den Behandlungswerkzeugen in der Regel von innen nach außen. Während sich die Behandlungswerkzeuge relativ zueinander bewegen, bilden die radial verlaufenden Nuten zusätzliche Arbeitskanten, was bei der Dispergierung, insbesondere die Schmutzpunktzerkleinerung, die Druckfarbenablösung sowie die Stickyzerkleinerung verbessert.
Auf diese Weise lassen sich der Energiebedarf sowie der Verschleiß erheblich reduzieren.As radially extending grooves are understood that extend at least with a directional component perpendicular to the circumferential direction of the treatment tool.
The pulp suspension flows through the gap between the treatment tools usually from the inside out. While the treatment tools move relative to each other, the radially extending grooves form additional working edges, which improves the dispersion, in particular the dirt dot comminution, the ink separation and the sticky comminution.
In this way, the energy consumption and wear can be significantly reduced.

Je nach Art und Beschaffenheit der Vorrichtung und/oder des Faserstoffs kann es hierzu vorteilhaft sein, wenn sich die Nut über den gesamten Zahn bzw. die gesamte Erhebung oder aber nur über einen Teil des Zahnes bzw. der Erhebung erstreckt.Depending on the type and nature of the device and / or the fibrous material, it may be advantageous for this purpose if the groove extends over the entire tooth or the entire elevation or only over a part of the tooth or the elevation.

Aus gleichem Grund kann es ebenso von Vorteil sein, wenn beide Behandlungswerkzeuge von gegensinnig angetriebenen Rotoren gebildet werden oder ein Behandlungswerkzeug von einem antreibbaren Rotor und das zweite Behandlungswerkzeug von einem feststehenden Stator gebildet wird.For the same reason, it may also be advantageous if both treatment tools are formed by oppositely driven rotors or a treatment tool by a driven rotor and the second treatment tool is formed by a stationary stator.

Besonders eignet sich die Vorrichtung zum Dispergieren des Faserstoffs, wobei die hohe Anzahl an Kanten, insbesondere in den Zahnlücken, die Effizienz der Behandlung erheblich steigert.The device is particularly suitable for dispersing the pulp, the high number of edges, in particular in the tooth spaces, significantly increasing the efficiency of the treatment.

Nachfolgend soll die Erfindung an einem Ausführungsbeispiel näher erläutert werden. In der beigefügten Zeichnung zeigt:

  • Figur 1: einen schematischen Querschnitt durch einen Disperger;
  • Figur 2: einen Teilquerschnitt durch ein Behandlungswerkzeug 3,4 in radialer Richtung 14 und
  • Figur 3: einen Teilquerschnitt durch ein Behandlungswerkzeug 3,4 in Umfangsrichtung 16.
The invention will be explained in more detail with reference to an exemplary embodiment. In the attached drawing shows:
  • FIG. 1 a schematic cross-section through a disperser;
  • FIG. 2 a partial cross section through a treatment tool 3.4 in the radial direction 14 and
  • FIG. 3 FIG. 2: a partial cross section through a treatment tool 3, 4 in the circumferential direction 16.

Der hochkonsistente Papierfaserstoff 1 wird gemäß Figur 1 direkt in den zentralen Bereich der Dispergergarnitur, welche von den beiden Behandlungswerkzeugen 3,4 gebildet wird, gedrückt.
Während ein Behandlungswerkzeug 3 feststehend und damit als Stator ausgebildet ist, ist das andere Behandlungswerkzeug 4 rotierbar im Gehäuse 2 des Dispergers gelagert.The high-consistency paper pulp 1 is according to FIG. 1 directly in the central area of the Dispergergarnitur, which is formed by the two treatment tools 3,4, pressed.
While a treatment tool 3 is stationary and thus designed as a stator, the other treatment tool 4 is rotatably mounted in the housing 2 of the disperser.

Die Dispergergarnitur mit dem Stator und dem Rotor wird also radial innen geschickt Bekanntlich wird Dispergierung dadurch bewirkt, dass Zähne 6 mit relativ hoher Geschwindigkeit relativ dicht aneinander vorbeibewegt werden und der sich dazwischen befindliche Faserstoff 1 starken Scherkräften unterworfen wird.
Hierzu kann der Faserstoff 1 über Heißdampf vorher aufgeheizt werden. Nach der Dispergierung fällt der dispergierte Faserstoff 1 nach unten durch den Auslass 15 heraus.
Wenn die axiale Position von Stator und Rotor relativ zueinander geändert wird, ändert sich dadurch auch der Spalt zwischen ihnen, wodurch sich in an sich bekannter Weise die Leistung des Dispergers steuern lässt.The Dispergergarnitur with the stator and the rotor is thus sent radially inward known dispersion is caused by the fact that teeth 6 with relatively high Speed are moved relatively close to each other and the fibrous material 1 therebetween is subjected to strong shear forces.
For this purpose, the pulp 1 can be previously heated by superheated steam. After dispersion, the dispersed pulp 1 falls down through the outlet 15.
As a result, when the axial position of the stator and the rotor is changed relative to each other, the gap between them also changes, whereby the performance of the disperser can be controlled in a manner known per se.

Die Behandlungswerkzeuge 3,4 haben jeweils eine rotationssymmetrische Form. Dabei weisen die koaxial zueinander angeordneten Behandlungswerkzeuge 3,4 jeweils in mehreren ringförmigen, zu ihrer Mitte konzentrischen Reihen 5 angeordnete Zähne 6 auf, zwischen denen sich Zahnlücken 7 befinden, die von dem Faserstoff 1 radial nach außen durchströmt werden.
Zwischen den Zahnreihen 5 sind ringförmige Zwischenräume 8 vorhanden, die so angeordnet sind, dass zumindest eine Zahnreihe 5 eines Behandlungswerkzeuges 3,4 in einen ringförmigen Zwischenraum 8 des anderen, komplementären Behandlungswerkzeuges 4,3 hineinreicht.The treatment tools 3,4 each have a rotationally symmetrical shape. In this case, the coaxially arranged treatment tools 3,4 each have a plurality of annular, concentric to their center rows 5 arranged teeth 6, between which there are tooth gaps 7, which are flowed through by the pulp 1 radially outward.
Between the rows of teeth 5 annular spaces 8 are provided, which are arranged so that at least one row of teeth 5 of a treatment tool 3,4 extends into an annular space 8 of the other, complementary treatment tool 4.3.

Entsprechend der Erfindung weisen alle Zahnlücken 7 Erhebungen 9 auf, die über den Zahngrund 11 der Zähne 6 hinausreichen. Dabei haben die Erhebungen 9 und die Zähne 6, wie in Figur 2 zu sehen, einen ähnlichen, etwa pyramidenstumpfförmigen Querschnitt in radialer Richtung 14. Damit wird die Durchströmung der Zahnlücken 7 soweit behindert, wie es für die Behandlung des Faserstoffes 1 förderlich ist.
Hierzu ist auch der Winkel 17 zwischen den Flanken 12 der Zähne 6 und der Winkel 18 zwischen den Flanken 19 der Erhebungen 9 gleichgroß.
Um einerseits eine ausreichende Durchströmung bei geringer Gefahr einer Verstopfung und andererseits eine möglichst effiziente Behandlung zu erhalten, liegt der Abstand 20 zwischen der Flanke 12 eines Zahnes 6 und der Flanke 19 der benachbarten Erhebung 9 in radialer Richtung 14 zwischen 2 und 3 mm.
Zur Minimierung des Verschleißes sind die Köpfe 13,21 der Zähne 6 und der Erhebungen 9 eben. Dabei hat der Zahnkopf 13 eine Höhe zwischen 20 und 25 mm über dem Zahngrund 11. Die Höhe des Kopfes 21 der Erhebungen 9 ergibt sich in Abhängigkeit vom Abstand 20 zwischen den Flanken, dem Flankenwinkel 18 und der minimalen Ausdehnung des Kopfes 21 in radialer Richtung 14.According to the invention, all tooth spaces 7 elevations 9, which extend beyond the tooth base 11 of the teeth 6. The elevations 9 and the teeth 6, as in FIG. 2 to see a similar, approximately truncated pyramidal cross-section in the radial direction 14. Thus, the flow through the tooth gaps 7 is hindered as far as it is conducive to the treatment of the pulp 1.
For this purpose, the angle 17 between the flanks 12 of the teeth 6 and the angle 18 between the flanks 19 of the elevations 9 is the same size.
On the one hand to obtain a sufficient flow with little risk of constipation and on the other hand the most efficient treatment, the distance 20 between the edge 12 of a tooth 6 and the edge 19 of adjacent elevation 9 in the radial direction 14 between 2 and 3 mm.
To minimize wear, the heads 13,21 of the teeth 6 and the elevations 9 are flat. The height of the head 21 of the elevations 9 results as a function of the distance 20 between the flanks, the flank angle 18 and the minimum extent of the head 21 in the radial direction fourteenth ,

Die Breite der Zähne 6 und der Erhebungen 9 in Umfangsrichtung 16 ist etwa gleich und liegt zwischen 2 und 5 mm.The width of the teeth 6 and the elevations 9 in the circumferential direction 16 is approximately equal and is between 2 and 5 mm.

Um die Durchströmung des Spaltes zu verbessern und zusätzliche Arbeitskanten für eine effiziente Behandlung des Faserstoffs 1 zu bilden, können die Zähne 6 und/oder die Erhebungen 9, wie in Figur 3 dargestellt, Nuten 10 vorzugsweise mit einer Richtungskomponente in radialer Richtung 14 besitzen.
Diese Nuten10 können sich über den gesamten Zahn 6 bzw. die gesamte Erhebung 9 oder nur einen Teil davon erstrecken. Dabei kann die teilweise Erstreckung beispielsweise ausschließlich über den Kopf 13,21 oder ausschließlich über eine Flanke 12,19 erfolgen.In order to improve the flow through the gap and to form additional working edges for efficient treatment of the pulp 1, the teeth 6 and / or the elevations 9, as in FIG. 3 shown, grooves 10 preferably having a directional component in the radial direction 14 have.
These grooves 10 may extend over the entire tooth 6 or the entire elevation 9 or only a part thereof. In this case, the partial extent, for example, exclusively via the head 13,21 or exclusively via a flank 12,19 done.

Claims (12)

  1. Device for the mechanical treatment of high-consistency fibrous material (1), having a housing (2) in which a first treatment tool (3) and a second treatment tool (4) are arranged, the treatment tools (3, 4) each having a rotationally symmetrical form, being arranged coaxially with respect to one another, each having teeth (6) arranged in a plurality of annular rows (5) concentric with their centre, between which there are tooth gaps (7), through which the fibrous material (1) flows radially, and there are annular interspaces (8) between the rows of teeth (5), which are arranged such that at least one row of teeth (5) of a treatment tool (3, 4) reaches into an annular interspace (8) of the other, complementary treatment tool (4, 3),
    characterized in that
    all the tooth gaps (7) have elevations (9) which reach beyond the base of the tooth (11), the elevations (2) and the teeth (6) having a cross section in the radial direction in the form of a truncated pyramid.
  2. Device according to Claim 1,
    characterized in that
    the flank angle (17, 18) of the teeth (6) and of the elevations (9) differs by only a maximum of 20°, preferably being the same.
  3. Device according to Claim 1 or 2,
    characterized in that
    the distance (20) between the flank (12) of a tooth (6) and the flank (19) of the adjacent elevation (9) in the radial direction (14) lies between 1 and 5 mm, preferably between 2 and 3 mm.
  4. Device according to one of Claims 1 to 3,
    characterized in that
    the head (13, 21) of the teeth (6) and of the elevations (9) is flat.
  5. Device according to one of Claims 1 to 4,
    characterized in that
    the tooth head (13) has a height between 10 and 40, preferably between 20 and 25 mm, above the tooth base (11).
  6. Device according to one of the preceding claims,
    characterized in that
    the width of the teeth (6) and of the elevations (9) in the circumferential direction (16) is approximately equal and preferably lies between 1 and 10 mm, in particular between 2 and 5 mm.
  7. Device according to one of the preceding claims,
    characterized in that
    teeth (6) and/or elevations (9) have grooves (10), preferably running radially.
  8. Device according to Claim 7,
    characterized in that
    the groove (10) extends over the whole of the tooth (6) or the whole of the elevation (9).
  9. Device according to Claim 7,
    characterized in that
    the groove (10) extends over only part of the tooth (6) or of the elevation (9).
  10. Device according to one of the preceding claims,
    characterized in that
    the device is constructed as a disperser for dispersing the fibrous material (1).
  11. Device according to one of the preceding claims,
    characterized in that
    both treatment tools (3, 4) are formed by rotors driven in opposite directions.
  12. Device according to one of Claims 1 to 10,
    characterized in that
    one treatment tool (4) is driven by a driveable rotor, and the other treatment tool (3) is formed by a stationary stator.
EP12708125.5A 2011-03-09 2012-03-07 Disperser Active EP2683870B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14161228.3A EP2757192A1 (en) 2011-03-09 2012-03-07 Disperger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110005273 DE102011005273A1 (en) 2011-03-09 2011-03-09 disperser
PCT/EP2012/053854 WO2012120019A1 (en) 2011-03-09 2012-03-07 Disperser

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP14161228.3A Division EP2757192A1 (en) 2011-03-09 2012-03-07 Disperger
EP14161228.3A Division-Into EP2757192A1 (en) 2011-03-09 2012-03-07 Disperger

Publications (2)

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EP2683870A1 EP2683870A1 (en) 2014-01-15
EP2683870B1 true EP2683870B1 (en) 2016-05-18

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Family Applications (2)

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EP12708125.5A Active EP2683870B1 (en) 2011-03-09 2012-03-07 Disperser
EP14161228.3A Withdrawn EP2757192A1 (en) 2011-03-09 2012-03-07 Disperger

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP14161228.3A Withdrawn EP2757192A1 (en) 2011-03-09 2012-03-07 Disperger

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EP (2) EP2683870B1 (en)
CN (1) CN103415662B (en)
DE (1) DE102011005273A1 (en)
WO (1) WO2012120019A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3647490A1 (en) 2018-10-29 2020-05-06 Andritz Inc. Supported toothed plates in a disperser

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015212012B4 (en) * 2015-06-29 2017-03-16 Voith Patent Gmbh disperser
US11859344B2 (en) 2018-10-29 2024-01-02 Andritz Inc. Supported toothed plates in a disperser with buttress extending from the substrate and between a first face of a tooth
DE102020105875A1 (en) * 2020-03-05 2021-09-09 Voith Patent Gmbh Fiber treatment device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19541892C1 (en) * 1995-11-10 1996-11-21 Voith Sulzer Stoffaufbereitung Mechanical treatment of consolidated fibrous material, esp. waste paper
US6422496B1 (en) * 2000-06-14 2002-07-23 Voith Sulzer Paper Technology North America, Inc. Refiner for refining a fiber suspension
US7172148B2 (en) * 2004-02-05 2007-02-06 Andritz Inc. Grooved pyramid disperger plate
US8342437B2 (en) * 2009-04-23 2013-01-01 Andritz Inc. Deflaker plate and methods relating thereto
DE202009018665U1 (en) * 2009-12-08 2012-08-16 Voith Patent Gmbh Disperger III

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3647490A1 (en) 2018-10-29 2020-05-06 Andritz Inc. Supported toothed plates in a disperser
EP3663461A1 (en) 2018-10-29 2020-06-10 Andritz Inc. Supported toothed plates in a disperser
US11208763B2 (en) 2018-10-29 2021-12-28 Andritz Inc. Supported toothed plates in a disperser
US11851816B2 (en) 2018-10-29 2023-12-26 Andritz Inc. Supported toothed plates in a disperser including bridge between teeth with cross-sectional shape

Also Published As

Publication number Publication date
EP2757192A1 (en) 2014-07-23
CN103415662A (en) 2013-11-27
DE102011005273A1 (en) 2012-09-13
EP2683870A1 (en) 2014-01-15
WO2012120019A1 (en) 2012-09-13
CN103415662B (en) 2016-08-17

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