EP0773316B1 - Device for treating high consistency pulp - Google Patents

Device for treating high consistency pulp Download PDF

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Publication number
EP0773316B1
EP0773316B1 EP96115698A EP96115698A EP0773316B1 EP 0773316 B1 EP0773316 B1 EP 0773316B1 EP 96115698 A EP96115698 A EP 96115698A EP 96115698 A EP96115698 A EP 96115698A EP 0773316 B1 EP0773316 B1 EP 0773316B1
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EP
European Patent Office
Prior art keywords
teeth
treatment
another
webs
gap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96115698A
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German (de)
French (fr)
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EP0773316A1 (en
Inventor
Hans Schnell
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Voith Paper Fiber and Environmental Solutions GmbH and Co KG
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Voith Sulzer Stoffaufbereitung GmbH
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/11—Details
    • B02C7/12—Shape or construction of discs
    • 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
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/22—Disintegrating by mills having rotary beater elements ; Hammer mills with intermeshing pins ; Pin Disk 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F2025/91—Direction of flow or arrangement of feed and discharge openings
    • B01F2025/912—Radial flow
    • B01F2025/9121—Radial flow from the center to the circumference, i.e. centrifugal flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/47—Mixing of ingredients for making paper pulp, e.g. wood fibres or wood pulp
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/56—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
    • B01F27/27—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 device for the mechanical treatment of highly consistent fibrous material according to the preamble of claim 1.
  • Such a treatment device is for example from DE-PS 30 47 013 known.
  • This device which is suitable for dispersing waste paper, serves the purpose of Machining material intensively mechanically and thermally, which means that the contained therein Contaminants detached from the fibers, crushed and / or below the visibility limit can be brought.
  • the pulp is not in a pumpable suspension processed, but in the form of a doughy or crumbly high consistency substance, preferably with a dry content between 20 and 40%. Let it this way significantly higher shear forces are transferred to the pulp, causing the mentioned goals are achievable without a significant change in Fiber length is done.
  • the effect of mechanical treatment further intensified by heat, e.g. by setting a fiber temperature of 90 ° Celsius or above.
  • the tooth heights that can be realized in the prior art for such devices depend also of the manufacturing process for the device for mechanical treatment of highly consistent fiber. So there are cast circle segments, which by Stringing together to form a closed ring-shaped rotor or stator set be assembled. For casting and molding reasons, such e.g. Components manufactured using the sand casting process have a gap width of 6 mm and a The tooth width should not be less than 6 mm, and the tooth height is usually not allowed be higher than 30 mm. Devices manufactured in such a process can only have a comparatively low material hardness. The other The working method is based on closed individual rings into which the column is milled Need to become.
  • the invention is therefore based on the object of a device for mechanical Treatment of high consistency pulp with which it is possible to create a greater throughput than before to be processed while maintaining or Improvement of the treatment effect.
  • the treatment tool 1 can be a rotor and the treatment tool 2 belong to a stator. So in the case shown here it will be Treatment tool, seen in the direction of flow, radially outside with a stator completed. It is easily conceivable that the radially last ring is a rotor ring which is e.g. the substance would be thrown out of the treatment apparatus.
  • the selected representation in the form of a section in side view shows that radially from the inside to those belonging to different treatment tools Alternate teeth 3, 4, 3 ', 4' '. Their height is given as H or H '.
  • Fig. 2 shows the arrangement is such that ring-shaped teeth are each one Form row of teeth and the row of teeth of a treatment tool in each Empty space 7 (FIG. 2) of the complementary tool is sufficient.
  • Teeth of the same row of teeth connected by webs 8, 8 ' the webs have a height of H1 or H1 '.
  • the between web 8, 8 'and the base of the Treatment tool 1, 2 remaining length of the gap is indicated with L or L'.
  • FIG. 2 shows a device designed according to the invention in a view from above, the teeth are shown partially cut. Only part of the in itself existing teeth is shown. One can see that the teeth in rows of teeth are arranged concentrically. There are two in each of the two radially outer rows of teeth Adjacent teeth 3 ', 4' connected to one another by webs. It is also possible to design such webs 8 in a ring shape and thereby a larger number in groups of teeth to connect. In extreme cases, the bar can hold the teeth of an entire row of teeth include. It should be noted that not all rows of teeth with ridges are necessarily must be provided. This measure is particularly advantageous on the radially outside lying rows of teeth.
  • FIG. 3 An exemplary embodiment is shown in FIG. 3 for better clarification of the device drawn in perspective.
  • the treatment tool 1 shown only partially contains an annular row of teeth with teeth 3, which are interconnected by the web 8 are connected.
  • the bridge lies at the tips of the teeth. But that doesn't have to be the case in all cases. So the bridge could also have teeth in other places connect and stabilize them mechanically.
  • FIG. 4 and 5 The one working with the treatment tool 1 shown here
  • treatment tool 2 can be constructed similarly.
  • you can Place webs so that they are radially in the same with complementary treatment tools Range, so that the most undesirable masking effect for the penetrating Material flow is minimal.
  • the location and shape of such webs are strength and to optimize treatment technology.
  • Fig. 6 shows a variant in which the webs 8 and 8 'do not extend over the entire width B. or B 'extend.
  • the processing edges over the entire height H or H 'of the teeth run, so be longer, which is an advantage in many cases Is fabric treatment.
  • a housing 11 essentially surrounds it and has one Supply opening 12 and a discharge opening 13 through which the fibrous material feeds or is to be dissipated.
  • the machine has a conveyor device 14 at the feed opening 12, which squeezes the crumbly high consistency substance so that a plug arises.
  • the fibrous material is moved radially between the treatment tools 1, 2 guided outside (arrow S) and then leaves the housing 11 through the discharge opening 13.

Abstract

The apparatus for processing fibre materials with a high consistency, such as used paper, has at least two neighbouring teeth (3, 3', 4, 4') in a row structured together so that the gap (5) between them forms an enclosed cross-section to allow a radial flow through it. Also claimed is an assembly with a housing fitted with at least one inflow opening and one outflow opening, shrouding the apparatus (1, 2) to process the material. At the feed, a unit forms the material into a plug to be advanced between the moving toothed sections (12).

Description

Die Erfindung betrifft eine Vorrichtung zur mechanischen Behandlung von hochkonsistentem Faserstoff gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for the mechanical treatment of highly consistent fibrous material according to the preamble of claim 1.

Eine derartige Behandlungsvorrichtung ist zum Beispiel aus der DE-PS 30 47 013 bekannt. Diese zum Dispergieren von Altpapier geeignete Vorrichtung dient dazu, den Stoff intensiv mechanisch und thermisch zu bearbeiten, wodurch die darin enthaltenen Störstoffe von den Fasern abgelöst, zerkleinert und/oder unter die Sichtbarkeitsgrenze gebracht werden können. Anders als zum Beispiel bei Papierstoff-Mahlrefinern wird bei derartigen Maschinen der Faserstoff nicht in einer pumpfähigen Suspension bearbeitet, sondern in Form eines teigigen oder krümeligen Hochkonsistenzstoffes, vorzugsweise mit einem Trockengehalt zwischen 20 und 40 %. Auf diese Weise lassen sich beträchtlich höhere Scherkräfte in den Faserstoff übertragen, wodurch die genannten Ziele erreichbar sind, ohne daß dabei eine wesentliche Veränderung der Faserlänge erfolgt. In vielen Fällen wird die Wirkung der mechanischen Behandlung durch Hitze weiter verstärkt, z.B. durch Einstellen einer Faserstofftemperatur von 90° Celsius oder noch darüber.Such a treatment device is for example from DE-PS 30 47 013 known. This device, which is suitable for dispersing waste paper, serves the purpose of Machining material intensively mechanically and thermally, which means that the contained therein Contaminants detached from the fibers, crushed and / or below the visibility limit can be brought. Unlike, for example, with pulp refiners in such machines the pulp is not in a pumpable suspension processed, but in the form of a doughy or crumbly high consistency substance, preferably with a dry content between 20 and 40%. Let it this way significantly higher shear forces are transferred to the pulp, causing the mentioned goals are achievable without a significant change in Fiber length is done. In many cases, the effect of mechanical treatment further intensified by heat, e.g. by setting a fiber temperature of 90 ° Celsius or above.

Durch die hohe Konsistenz, die der Faserstoff bei der Behandlung hat, ist eine intensive mechanische Bearbeitung möglich, obwohl sich die Zähne der relativ zueinander bewegbaren Behandlungswerkzeuge nicht berühren, sondern sich vielmehr in einem Abstand von ca. 1 mm oder mehr aneinander vorbeibewegen. Dabei treten an den Zähnen ganz erhebliche Kräfte auf, die insbesondere den Zahnfuß belasten. Wegen der Hebelwirkung greift zusätzlich zu den Scherkräften am Zahnfuß ein hohes Moment an, das mit zunehmender Zahnhöhe stark zunimmt. Andererseits sind höhere Zähne von Vorteil, da der zur Verfügung stehende Durchtrittsquerschnitt im wesentlichen zur Zahnhöhe proportional ist. Daher läßt sich dann mit einer Vorrichtung in derselben Zeit eine entsprechend größere Menge mit gleich hoher Intensität behandeln. Mit größeren Maschineneinheiten ist fast immer eine höhere Wirtschaftlichkeit bezüglich Investitions- und Betriebskosten erreichbar.Due to the high consistency that the fibrous material has during the treatment, it is intense mechanical processing possible, although the teeth are relative to each other Do not touch movable treatment tools, but rather in one Move a distance of approx. 1 mm or more past each other. Do this on the teeth very considerable forces that stress the tooth base in particular. Because of the In addition to the shear forces on the tooth base, leverage acts on a high moment, which increases sharply with increasing tooth height. On the other hand, higher teeth are from Advantage, since the available cross-section essentially for Tooth height is proportional. It is therefore possible to use one device at the same time treat a correspondingly larger amount with the same high intensity. With bigger ones Machine units are almost always more economical in terms of Investment and operating costs attainable.

Die im Stand der Technik realisierbaren Zahnhöhen für derartige Vorrichtungen hängen auch vom Herstellungsverfahren für die Vorrichtung zur mechanischen Behandlung von hochkonsistentem Faserstoff ab. So gibt es gegossene Kreissegmente, welche durch Aneinanderreihung zu einer geschlossenen ringförmigen Rotor- oder Statorgarnitur zusammengebaut werden. Aus gieß- und formtechnischen Gründen können bei solchen z.B. im Sandgußverfahren hergestellten Bauteilen eine Spaltbreite von 6 mm und eine Zahnbreite von 6 mm nicht unterschritten werden, und die Zahnhöhe darf meist nicht höher als 30 mm sein. Vorrichtungen, die in einem solchen Verfahren hergestellt werden, können nur eine vergleichsweise geringe Materialhärte haben. Das andere Arbeitsverfahren geht von geschlossenen Einzelringen aus, in die die Spalte eingefräst werden müssen. Diese Ringe werden in konzentrischer Anordnung zu einer kompletten Rotor- oder Statorgarnitur zusammengebaut. Wegen des Fräsverfahrens könnten die Spalte an sich kleiner sein als beim Guß, es ergeben sich aber Einschränkungen durch die Festigkeitsanforderungen. Dennoch lassen sich gefräste Garniturringe mit höheren Zähnen herstellen als wenn sie gegossen werden. Nachteilig sind allerdings beim Fräsen die hohen Fertigungskosten.The tooth heights that can be realized in the prior art for such devices depend also of the manufacturing process for the device for mechanical treatment of highly consistent fiber. So there are cast circle segments, which by Stringing together to form a closed ring-shaped rotor or stator set be assembled. For casting and molding reasons, such e.g. Components manufactured using the sand casting process have a gap width of 6 mm and a The tooth width should not be less than 6 mm, and the tooth height is usually not allowed be higher than 30 mm. Devices manufactured in such a process can only have a comparatively low material hardness. The other The working method is based on closed individual rings into which the column is milled Need to become. These rings become a complete in a concentric arrangement Assembled rotor or stator set. Because of the milling process, the Column itself may be smaller than in the casting, but there are restrictions due to the strength requirements. Nevertheless, milled clothing rings with higher ones can be used Make teeth as if they were poured. However, they are disadvantageous when milling the high manufacturing costs.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung zur mechanischen Behandlung von hochkonsistentem Faserstoff zu schaffen, mit der es möglich ist, eine größere Durchsatzmenge als bisher zu verarbeiten unter Beibehaltung oder Verbesserung der Behandlungswirkung.The invention is therefore based on the object of a device for mechanical Treatment of high consistency pulp with which it is possible to create a greater throughput than before to be processed while maintaining or Improvement of the treatment effect.

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.

Durch diese Maßnahmen können die dem Faserstoff zur Verfügung stehenden Strömungsquerschnitte zwischen den Zähnen vergrößert werden, ohne eine Überlastung der Zahnfüße befürchten zu müssen. Der Verbindungssteg zwischen benachbarten Zähnen bringt nämlich infolge seiner Starrheit ein Gegenmoment auf, das den Widerstand gegen Durchbiegen der Zähne erhöht. Außerdem werden Spitzenwerte von Scherkräften auf mehrere Zähne verteilt.These measures enable those available to the fibrous material Flow cross sections between the teeth can be enlarged without overloading fear of the tooth feet. The connecting bridge between neighboring Because of its rigidity, teeth bring about a counter-moment that the Resistance to tooth deflection increased. In addition, peak values of Shear forces distributed over several teeth.

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

Fig. 1
Schnitt durch den wesentlichen Teil der erfindungsgemäßen Vorrichtung in Seitenansicht;
Fig. 2
Aufsicht auf die Vorrichtung;
Fig. 3a
perspektivische Darstellung eines Teiles des Behandlungswerkzeugs;
Fig. 3b
Seitenansicht bezüglich Fig. 3a;
Fig. 4
Teilansicht einer weiteren Ausführungsform eines Behandlungswerkzeugs;
Fig. 5
die Variante der Fig. 4 im Eingriff mit weiteren Behandlungswerkzeugen;
Fig. 6
Seitenansicht einer Variante, geschnitten;
Fig. 7
Schnitt durch eine Behandlungsmaschine, die die Vorrichtung enthält.
The invention and its advantages are explained with reference to drawings. Show:
Fig. 1
Section through the essential part of the device according to the invention in side view;
Fig. 2
Supervision of the device;
Fig. 3a
perspective view of part of the treatment tool;
Fig. 3b
Side view with respect to Fig. 3a;
Fig. 4
Partial view of a further embodiment of a treatment tool;
Fig. 5
the variant of Figure 4 in engagement with other treatment tools.
Fig. 6
Side view of a variant, cut;
Fig. 7
Section through a treatment machine that contains the device.

Fig. 1 zeigt zwei relativ zueinander bewegbare komplementäre Behandlungswerkzeuge 1 und 2, die miteinander so im Eingriff stehen, daß sie zusammenwirken können. Zum Beispiel kann das Behandlungswerkzeug 1 zu einem Rotor und das Behandlungswerkzeug 2 zu einem Stator gehören. Dabei wird also im hier dargestellten Falle das Behandlungswerkzeug, in Strömungsrichtung gesehen, radial außen mit einem Stator abgeschlossen. Es ist ohne weiteres vorstellbar, daß der radial letzte Ring ein Rotorring ist, wodurch z.B. der Stoff aus dem Behandlungsapparat ausgeschleudert würde. Die gewählte Darstellung in Form eines Schnitts in Seitenansicht läßt erkennen, daß sich radial von innen nach außen die zu verschiedenen Behandlungswerkzeugen gehörenden Zähne 3, 4, 3', 4'' abwechseln. Deren Höhe ist als H bzw. H' angegeben. Die Richtung der Stoffströmung, radial von innen nach außen, wird durch den Pfeil S angedeutet. Wie Fig. 2 zeigt, ist die Anordnung derart, daß ringförmig angeordnete Zähne jeweils eine Zahnreihe bilden und die Zahnreihe eines Behandlungswerkzeuges jeweils in den Leerraum 7 (Fig. 2) des komplementären Werkzeuges reicht. Dabei sind benachbarte Zähne derselben Zahnreihe durch Stege 8, 8' miteinander verbunden, wobei die Stege eine Höhe von H1 bzw. H1'aufweisen. Die zwischen Steg 8, 8'und dem Grundkörper des Behandlungswerkzeuges 1, 2 verbleibende Länge des Spaltes ist mit L bzw. L'angegeben.1 shows two complementary treatment tools 1 that can be moved relative to one another and 2 that are engaged with each other so that they can cooperate. To the For example, the treatment tool 1 can be a rotor and the treatment tool 2 belong to a stator. So in the case shown here it will be Treatment tool, seen in the direction of flow, radially outside with a stator completed. It is easily conceivable that the radially last ring is a rotor ring which is e.g. the substance would be thrown out of the treatment apparatus. The selected representation in the form of a section in side view shows that radially from the inside to those belonging to different treatment tools Alternate teeth 3, 4, 3 ', 4' '. Their height is given as H or H '. The direction of the Flow of material, radially from the inside to the outside, is indicated by the arrow S. As Fig. 2 shows, the arrangement is such that ring-shaped teeth are each one Form row of teeth and the row of teeth of a treatment tool in each Empty space 7 (FIG. 2) of the complementary tool is sufficient. There are neighboring ones Teeth of the same row of teeth connected by webs 8, 8 ', the webs have a height of H1 or H1 '. The between web 8, 8 'and the base of the Treatment tool 1, 2 remaining length of the gap is indicated with L or L'.

Die Fig. 2 zeigt eine erfindungsgemäß ausgeführte Vorrichtung in Ansicht von oben, wobei die Zähne teilweise geschnitten dargestellt sind. Nur ein Teil der an sich vorhandenen Zähne ist eingezeichnet. Man erkennt, daß die Zähne in Zahnreihen konzentrisch angeordnet sind. In den beiden radial äußeren Zahnreihen sind jeweils zwei benachbarte Zähne 3', 4'durch Stege miteinander verbunden. Es ist auch gut möglich, solche Stege 8 ringförmig auszubilden und dadurch gruppenweise eine größere Anzahl von Zähnen zu verbinden. Der Steg kann im Extremfall die Zähne einer ganzen Zahnreihe umfassen. Anzumerken ist, daß nicht notwendigerweise alle Zahnreihen mit Stegen versehen sein müssen. Besonders vorteilhaft ist diese Maßnahme an den radial außen liegenden Zahnreihen.2 shows a device designed according to the invention in a view from above, the teeth are shown partially cut. Only part of the in itself existing teeth is shown. One can see that the teeth in rows of teeth are arranged concentrically. There are two in each of the two radially outer rows of teeth Adjacent teeth 3 ', 4' connected to one another by webs. It is also possible to design such webs 8 in a ring shape and thereby a larger number in groups of teeth to connect. In extreme cases, the bar can hold the teeth of an entire row of teeth include. It should be noted that not all rows of teeth with ridges are necessarily must be provided. This measure is particularly advantageous on the radially outside lying rows of teeth.

Zur besseren Verdeutlichung der Vorrichtung ist ein Ausführungsbeispiel in Fig. 3 perspektivisch gezeichnet. Das nur teilweise dargestellte Behandlungswerkzeug 1 enthält eine ringförmige Zahnreihe mit Zähnen 3, die durch den Steg 8 miteinander verbunden sind. Dabei liegt der Steg an den Spitzen der Zähne. Das muß aber nicht in allen Fällen so sein. So könnte der Steg durchaus auch die Zähne an anderen Stellen verbinden und sie so mechanisch stabilisieren. Ein solches Beispiel zeigen die Figuren 4 und 5. Das mit dem hier dargestellten Behandlungswerkzeug 1 zusammenarbeitende Behandlungswerkzeug 2 kann prinzipiell ähnlich aufgebaut sein. Die in Fig. 5 gezeigte Seitenansicht, schematisch im Schnitt, zeigt zwei Behandlungswerkzeuge 1 und 2, die sich so im Eingriff befinden, daß eine bestimmungsgemäße Benutzung der Bearbeitungsvorrichtung möglich ist. Wie hier exemplarisch dargestellt, kann man die Stege so legen, daß sie bei komplementären Behandlungswerkzeugen radial im selben Bereich liegen, so daß die meist unerwünschte Abdeckwirkung für den durchtretenden Stoffstrom minimal ist. Lage und Form solcher Stege sind festigkeitsmäßig und behandlungstechnologisch zu optimieren. An exemplary embodiment is shown in FIG. 3 for better clarification of the device drawn in perspective. The treatment tool 1 shown only partially contains an annular row of teeth with teeth 3, which are interconnected by the web 8 are connected. The bridge lies at the tips of the teeth. But that doesn't have to be the case in all cases. So the bridge could also have teeth in other places connect and stabilize them mechanically. Such an example is shown in FIG. 4 and 5. The one working with the treatment tool 1 shown here In principle, treatment tool 2 can be constructed similarly. The one shown in Fig. 5 Side view, schematically in section, shows two treatment tools 1 and 2, the are so engaged that the intended use of the Processing device is possible. As shown here as an example, you can Place webs so that they are radially in the same with complementary treatment tools Range, so that the most undesirable masking effect for the penetrating Material flow is minimal. The location and shape of such webs are strength and to optimize treatment technology.

Fig. 6 zeigt eine Variante, bei der sich die Stege 8 und 8' nicht über die gesamte Breite B bzw. B' erstrecken. Dadurch können die Bearbeitungskanten über die gesamte Höhe H bzw. H' der Zähne verlaufen, also länger sein, was in vielen Fällen von Vorteil bei der Stoffbehandlung ist.Fig. 6 shows a variant in which the webs 8 and 8 'do not extend over the entire width B. or B 'extend. As a result, the processing edges over the entire height H or H 'of the teeth run, so be longer, which is an advantage in many cases Is fabric treatment.

Fig. 7 zeigt eine Behandlungsmaschine, in die zwei Behandlungswerkzeuge 1, 2 eingesetzt. sind. Ein Gehäuse 11 umgibt diese im wesentlichen und weist eine Zufuhröffnung 12 und eine Abfuhröffnung 13 auf, durch die der Faserstoff zu- bzw. abzuführen ist. An der Zufuhröffnung 12 hat die Maschine eine Fördereinrichtung 14, welche den krümeligen Hochkonsistenzstoff zusammendrückt, so daß ein Pfropfen entsteht. Der Faserstoff wird zwischen den Behandlungswerkzeugen 1, 2 radial nach außen (Pfeil S) geführt und verläßt dann das Gehäuse 11 durch die Abfuhröffnung 13.7 shows a treatment machine into which two treatment tools 1, 2 used. are. A housing 11 essentially surrounds it and has one Supply opening 12 and a discharge opening 13 through which the fibrous material feeds or is to be dissipated. The machine has a conveyor device 14 at the feed opening 12, which squeezes the crumbly high consistency substance so that a plug arises. The fibrous material is moved radially between the treatment tools 1, 2 guided outside (arrow S) and then leaves the housing 11 through the discharge opening 13.

Claims (18)

  1. Device for the mechanical treatment of high-consistency fibrous stock, having at least two treatment tools (1, 2) which can be moved relative to each other,
    1.1 which respectively have an essentially rotationally symmetrical base body and are arranged coaxially with one another,
    1.2 which have teeth (3, 3', 4, 4') which are arranged in annular rows concentric with their centre and between which there are gaps (5, 6) which form free cross sections through which the fibrous stock to be treated can flow,
    1.3 which have annular clearances (7) between the rows of teeth,
    1.4 which are positioned in relation to one another such that at least one row of teeth of a treatment tool (1, 2) reaches into an annular clearance in another treatment tool (2, 1),
    characterized in that at least two adjacent teeth (3, 3', 4, 4') of a row of teeth are in each case connected to one another such that at least part of the gap (5) between them forms a cross section through which flow can radially take place.
  2. Device according to Claim 1 or 2, characterized in that the length (L, L') of the gap (5) which forms the closed cross section is between 40 and 150 mm.
  3. Device according to Claim 1 or 2, characterized in that the width of the gap measured in the circumferential direction lies between 5 and 30 mm.
  4. Device according to Claim 1, 2 or 3, characterized in that the length (L, L') of the gap 5 which forms the closed cross section is at least six times its width measured in the circumferential direction.
  5. Device according to one of the preceding claims, characterized in that the connection is produced by webs (8, 8') which are rigidly connected to the tips of the teeth (3, 3', 4, 4').
  6. Device according to one of the preceding claims, characterized in that the connected is produced by webs (8, 8') which are arranged between the teeth in such a way that the intermediate gap (5) is divided, forming a lower length (L1) towards the tooth root and an upper length (L2) towards the tooth tip.
  7. Device according to Claim 6, characterized in that the lower length (L1) is approximately equal to the upper length (L2).
  8. Device according to one of the preceding claims, characterized in that the webs (8, 8') have a height (H1, H1') between 4 and 20 mm.
  9. Device according to one of the preceding claims, characterized in that the rotationally symmetrical base body has a number of concentric rows of teeth arranged radially with respect to one another, and two adjacent treatment tools, which can be moved relative to each other, are arranged axially beside each other.
  10. Device according to Claims 6 and 9 or 7 and 9, characterized in that in adjacent rows of teeth of different treatment tools (2, 3), the webs (8, 8'), as viewed radially, are arranged one behind another.
  11. Device according to one of the preceding claims, characterized in that adjacent teeth (3, 3', 4, 4') of a row of teeth are connected to one another by a maximum of one web (8, 8').
  12. Device according to one of the preceding claims, characterized in that the width of the webs (8, 8'), as viewed in the radial direction, is only part of the width (B, B') of the teeth.
  13. Device according to one of the preceding claims, characterized in that the treatment tool is composed of individual circular or annular segments.
  14. Device according to one of the preceding claims, characterized in that the treatment tools are produced by a casting or injection-moulding process.
  15. Device according to one of the preceding claims, characterized in that the rotationally symmetrical base body has a number of concentric rows of teeth arranged radially with respect to one another, and two adjacent treatment tools, which can be moved relative to each other, are arranged axially beside each other.
  16. Treatment machine, which contains a device for mechanical treatment according to one of the preceding claims, characterized in that the treatment machine has a casing (11) which has at least one feed opening (12) and at least one discharge opening (13) and essentially surrounds the treatment tools (1, 2), the treatment machine being provided at the feed opening (12) with a plug-forming delivery device (14) for feeding the high-consistency fibrous stock to be treated, with which device, when the machine is operating, the fibrous stock is led between the treatment tools (1, 2) which can be moved relative to each other.
  17. Treatment machine according to Claim 16, characterized in that the discharge opening (13) is a fall shaft for the treated high-consistency fibrous stock.
  18. Treatment machine according to Claim 16 or 17, characterized in that downstream of the treatment tools (1, 2) there are devices for adding dilution water to the treated high-consistency fibrous stock.
EP96115698A 1995-11-10 1996-10-01 Device for treating high consistency pulp Expired - Lifetime EP0773316B1 (en)

Applications Claiming Priority (2)

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DE19541891 1995-11-10
DE19541891A DE19541891A1 (en) 1995-11-10 1995-11-10 Device for the treatment of highly consistent fiber

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EP0773316B1 true EP0773316B1 (en) 2001-03-07

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US (1) US5904308A (en)
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AT (1) ATE199577T1 (en)
CA (1) CA2189901A1 (en)
DE (2) DE19541891A1 (en)

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Publication number Publication date
CA2189901A1 (en) 1997-05-11
DE59606543D1 (en) 2001-04-12
DE19541891A1 (en) 1997-05-22
ATE199577T1 (en) 2001-03-15
EP0773316A1 (en) 1997-05-14
US5904308A (en) 1999-05-18

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