EP1693505A1 - Pulper for disintegration and suspension of paper pulp and rotor suitable for such a pulper - Google Patents

Pulper for disintegration and suspension of paper pulp and rotor suitable for such a pulper Download PDF

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Publication number
EP1693505A1
EP1693505A1 EP06000661A EP06000661A EP1693505A1 EP 1693505 A1 EP1693505 A1 EP 1693505A1 EP 06000661 A EP06000661 A EP 06000661A EP 06000661 A EP06000661 A EP 06000661A EP 1693505 A1 EP1693505 A1 EP 1693505A1
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EP
European Patent Office
Prior art keywords
rotor
pulper
pulper according
working
pulp
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EP06000661A
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German (de)
French (fr)
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EP1693505B1 (en
Inventor
Gerhard Gaus
Axel Gommel
Tillman Katzenmeier
Wolfgang Müller
Andreas Steidele
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Voith Patent GmbH
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Voith Patent GmbH
Voith Paper Patent GmbH
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Publication of EP1693505A1 publication Critical patent/EP1693505A1/en
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    • 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
    • D21B1/34—Kneading or mixing; Pulpers

Definitions

  • the invention relates to a pulper for comminution and suspension of pulp and rotor for such a pulper.
  • Pulpers of this type are mainly used to suspend dried pulp or waste paper. They consist essentially of a container for the suspension and at least one rotor. The registered material is intensively mixed in large pieces, webs or pressed bales with water, whereby a hydraulic material drive is generated by the rotor. Understandably, such devices are optimized, aiming essentially for a fast and efficient dissolution. In many cases, the rotor is placed in close proximity to a flat screen that keeps it free of blockages. Through the openings of the screen, the dissolved substance is withdrawn as a suspension.
  • the standard type for a pulper is a vertical cylindrical container with a rotor in the bottom area.
  • water and the material to be dissolved is added from the top and with the help of the rotor creates a Trombenströmung in the suspension, ie in the inner region of the fabric is pulled down from the rotor and pressed radially outward in the bottom region, resulting in a Umtriebsströmung results.
  • the circumferential flow braked is also known to control this Umtriebsströmung.
  • Another typical design is the open top pulper with laterally inserted rotor.
  • Embodiments for rotors usable in such pulpers are known from many publications, for example: DE 25 00 860 A1, US Pat. No. 4,480,796 A, DE 102 54 544 A1 and DE 844 116 C.
  • the invention is based on the object to improve pulpers for crushing and suspending paper stock so that the dissolution process can be carried out more economically and gently.
  • an improved deflaking effect can be achieved.
  • the working strips at the top of the wings are suitable for intensifying the dissolving effect.
  • This feature may also be combined with the known dissolution ledges or protrusions attached to the sieve facing side of the rotor can be located. In this area, ie in the space between the rotor and sieve, also an intensive processing of the pulp by shear forces takes place, if this is fine enough to get there. Further advantages are possible in that the blades of the rotor are strongly curved and form a relatively acute angle with the peripheral circle at its outer radius. In particular, if a flat dissolving container is used with laterally attached rotor, it can be generated with this measure a low-spin flow.
  • the wear protection can be improved by providing the front sides of the wings or the working strips with replaceable wear-resistant plates or strips. It is also conceivable to design the working strips in total as replaceable wear parts.
  • FIG. 1 shows the top view of a rotor for a pulper according to the invention. Even if such a rotor in the pulper is not always horizontal, that is operated with a vertical axis, it is assumed here of this special installation situation and accordingly spoken of "top” and "bottom".
  • the rotor 2 is provided with a total of five curved wings 3 and is driven in rotation in the direction of rotation 6 during operation of the pulper. One of the wings is shown below the task bar 7 cut.
  • the rotor acts with a sieve 10 together, of which only a small part is drawn here. This screen 10 is mounted at a distance A to the bottom of the rotor (see Fig. 2).
  • the smallest distance A is as small as possible, so that a good resolution is achieved and thus the rotor or its wings 3 can serve to keep the screen openings 11 free. It lies with advantage with few millimeters. If the sieve is provided with strips on the side facing the rotor, which advantageously enhances the dissolving effect, the distance A is to be measured from the upper side of the strip.
  • working strips 7 are mounted, which project in the direction of rotation 6 and e.g. can have a rectangular cross-section.
  • their upper side 16 and / or lower side 15, at least predominantly aligned perpendicular to the rotor axis.
  • Its axial extent B is advantageously relatively small compared to the axial extent of the wings 3, e.g. between 5 and 20%.
  • Thre working edges can be smooth or with a serrated profile.
  • the blades 3 of the rotor have on its front side, ie the side which drives the suspension during rotation, below the working strips 7, a front surface 4 whose projection on the wire 11 the circumferential circle 5 intersects at an angle ⁇ of at most 20 °.
  • this angle ⁇ is relatively acute and has a special hydraulic effect when driving the suspension in the pulper because of the pronounced radial conveying action.
  • Fig. 1 the line II is entered, along which a section is laid and shown in Fig. 2. This section through the wing 3, the hub body 9 of the rotor and the screen 10 shows in particular the distance A between the underside of the rotor and the top of the screen 10.
  • a rounding 13 between working strips 7 and leading edges of the wings 3 in the radially outer region of the rotor visible (here as Quarter ellipse).
  • This rounding has hydraulic advantages and may have a radius of curvature between 20 and 60% of the axial extent of the wing 3. It can also be seen that in the example shown here, the hub body 9 of the rotor is fastened releasably on a shaft flange 12 by means of screws 14.
  • Fig. 3 is a section along the line III (Fig. 1) visible. Also at this point, a part of the task bar 7 can be seen, which, however, followed by only a small rounding on the front surface 4 of the wing 3.
  • the surface 4 In the vicinity of the sieve, the surface 4 is inclined to a plane perpendicular to the sieve parallel or with an inclination angle ⁇ , said angle of inclination ⁇ is advantageously between 15 and 30 °. Since this inclination is directed so that the parts of the surface 4 further away from the screen project in the direction of rotation, a flow component is produced in the direction of the screen, which in many cases improves the resolving action of the rotor.
  • a pulper to which the invention can be applied, is the standing, cylindrical, top open pulper according to FIG. 4, in which sieve 10 and rotor 2 are located in the bottom region.
  • the rotor 2 has an axial extent E which is between 10% and 20% of the diameter of the circumferential circle 5.
  • the pulper is then particularly suitable for consistencies between 2 and 6%.
  • pulp S and water W are introduced into the container 1 of the pulper.
  • the finished pumpable suspension is withdrawn through the screen openings of the screen 10 as accept G.
  • Another likewise advantageous embodiment of the invention is a pulper with at least one laterally mounted rotor according to FIG. 5 with a horizontal container 1 '.
  • a horizontal container may e.g.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

Pulp beater comprises a vessel for receiving pulp and water, a blade-bearing rotor mounted in the vessel, and a screen (10) whose surface is swept by the rotor. The rotor blades (3) are curved so that the angle (alpha ) between the tip of the leading edge (4) and the circumference (5) of the blade path is no more than 20[deg] and the blades are fitted on top with forward-projecting guide facings (7) that intersect the circumference at an angle (beta ) of at least 40[deg]. An independent claim is also included for a pulp beater rotor as above.

Description

Die Erfindung betrifft einen Stofflöser zur Zerkleinerung und Suspendierung von Papierstoff sowie Rotor für einen solchen Stofflöser.The invention relates to a pulper for comminution and suspension of pulp and rotor for such a pulper.

Stofflöser dieser Art werden hauptsächlich angewendet, um getrocknetes Zellstoffmaterial oder Altpapier in Suspension zu bringen. Sie bestehen im Wesentlichen aus einem Behälter für die Suspension und mindestens einem Rotor. Das eingetragene Material wird in großen Stücken, Bahnen oder gepressten Ballen mit Wasser intensiv vermischt, wobei durch den Rotor ein hydraulischer Stoffumtrieb erzeugt wird. Verständlicherweise werden solche Vorrichtungen optimiert, wobei im Wesentlichen eine schnelle und kraftwirtschaftliche Auflösung angestrebt wird. In vielen Fällen wird der Rotor in unmittelbarer Nähe eines ebenen Siebes angeordnet, das er frei von Verstopfungen hält. Durch die Öffnungen des Siebes wird der aufgelöste Stoff als Suspension abgezogen.Pulpers of this type are mainly used to suspend dried pulp or waste paper. They consist essentially of a container for the suspension and at least one rotor. The registered material is intensively mixed in large pieces, webs or pressed bales with water, whereby a hydraulic material drive is generated by the rotor. Understandably, such devices are optimized, aiming essentially for a fast and efficient dissolution. In many cases, the rotor is placed in close proximity to a flat screen that keeps it free of blockages. Through the openings of the screen, the dissolved substance is withdrawn as a suspension.

Als Standardtyp für einen Stofflöser hat sich ein senkrecht stehender zylindrischer Behälter mit einem Rotor im Bodenbereich durchgesetzt. In diesen Behälter wird Wasser und der aufzulösende Stoff von oben zugegeben und mit Hilfe des Rotors eine Trombenströmung in der Suspension erzeugt, bei der also im inneren Bereich der Stoff vom Rotor nach unten gezogen und im Bodenbereich radial nach außen gedrückt wird, wodurch sich eine Umtriebsströmung ergibt. Es sind auch Strömungsmaßnahmen bekannt, um diese Umtriebsströmung zu steuern. So wird z.B. durch entsprechende Strömungseinbauten (wie Wehrbleche oder Strömungsbrecher) an der Behälterwandung die Umfangsströmung gebremst, da sie nur einen geringen Beitrag zur Auflösung bringt. Eine weitere typische Bauart ist der oben offene Pulper mit seitlich eingesetztem Rotor. Dann wird die Suspension etwa waagerecht zum Rotor gefördert und an der den Rotor tragenden Seitenwand des Behälters umgelenkt. Diese hydraulisch oft weniger günstige Form hat den Vorteil, unter der Papiermaschine als Ausschussauflöser Platz zu finden. Die Förderung des eigentlichen Umtriebs, d.h. der wiederholte Transport des aufzulösenden Stoffes in den Rotorbereich bringt in der Regel eine Verbesserung des Effektes. Aus diesem Grund ist auch schon viel Entwicklung an den Rotoren und Behältern des Stofflösers betrieben worden.The standard type for a pulper is a vertical cylindrical container with a rotor in the bottom area. In this container, water and the material to be dissolved is added from the top and with the help of the rotor creates a Trombenströmung in the suspension, ie in the inner region of the fabric is pulled down from the rotor and pressed radially outward in the bottom region, resulting in a Umtriebsströmung results. There are also flow measures known to control this Umtriebsströmung. Thus, for example, by appropriate flow installations (such as weir plates or flow breaker) on the container wall, the circumferential flow braked, as it brings only a small contribution to the resolution. Another typical design is the open top pulper with laterally inserted rotor. Then the suspension is conveyed approximately horizontally to the rotor and deflected on the side wall of the container carrying the rotor. This hydraulically often less favorable form has the advantage of finding space under the paper machine as broke dissolver. The promotion of the actual Umtriebs, ie the repeated transport of the substance to be dissolved in the rotor area usually brings an improvement of the effect. For this reason, a great deal of development has already been carried out on the rotors and containers of the pulper.

Einen Versuch, Stofflöser dieser Art zu verbessern, zeigt die DE 36 38 993 C2.An attempt to improve pulper of this type is shown in DE 36 38 993 C2.

Ausführungsvarianten für in solchen Stofflösern einsetzbare Rotoren sind aus vielen Publikationen bekannt, z.B.: DE 25 00 860 A1, US 4,480,796 A, DE 102 54 544 A1 und DE 844 116 C.Embodiments for rotors usable in such pulpers are known from many publications, for example: DE 25 00 860 A1, US Pat. No. 4,480,796 A, DE 102 54 544 A1 and DE 844 116 C.

Diese Publikationen zeigen auch, dass es bei der Entwicklung solcher Rotoren gilt, eine Vielzahl von verschiedenen Anforderungen zu erfüllen, insbesondere Auflösung, Wirtschaftlichkeit, Siebfreihaltung, Verschleißverhalten und Herstellkosten.These publications also show that in the development of such rotors it is necessary to meet a variety of different requirements, in particular resolution, economy, Siebfreihaltung, wear behavior and manufacturing costs.

Der Erfindung liegt die Aufgabe zu Grunde, Stofflöser für das Zerkleinern und Suspendieren von Papierstoff so zu verbessern, dass der Auflösevorgang wirtschaftlicher und schonender durchgeführt werden kann.The invention is based on the object to improve pulpers for crushing and suspending paper stock so that the dissolution process can be carried out more economically and gently.

Diese Aufgabe wird durch die im Kennzeichen des Anspruchs 1 genannten Maßnahmen gelöst.This object is achieved by the measures mentioned in the characterizing part of claim 1.

Mit Hilfe der erfindungsgemäßen Merkmale, insbesondere der Neugestaltung des Rotors wird eine verbesserte Entstippungswirkung erreichbar. Dabei sind die an der Oberseite der Flügel vorstehenden Arbeitsleisten geeignet, die Auflösewirkung zu verstärken. Dieses Merkmal kann auch kombiniert sein mit den an sich bekannten Auflöseleisten oder Vorsprüngen, die sich an der dem Sieb zugewandten Seite des Rotors befinden können. In diesem Bereich, also in dem Zwischenraum zwischen Rotor und Sieb, findet ebenfalls eine intensive Bearbeitung des Papierstoffes durch Scherkräfte statt, sofern dieser fein genug ist, um dort hin zu gelangen. Weitere Vorteile sind dadurch möglich, dass die Flügel des Rotors stark geschwungen sind und an ihrem Außenradius einen relativ spitzen Winkel mit dem Umfangskreis bilden. Insbesondere, wenn ein flacher Auflösebehälter mit seitlich angesetztem Rotor verwendet wird, kann darin mit dieser Maßnahme eine drallarme Strömung erzeugt werden.With the aid of the features according to the invention, in particular the redesign of the rotor, an improved deflaking effect can be achieved. The working strips at the top of the wings are suitable for intensifying the dissolving effect. This feature may also be combined with the known dissolution ledges or protrusions attached to the sieve facing side of the rotor can be located. In this area, ie in the space between the rotor and sieve, also an intensive processing of the pulp by shear forces takes place, if this is fine enough to get there. Further advantages are possible in that the blades of the rotor are strongly curved and form a relatively acute angle with the peripheral circle at its outer radius. In particular, if a flat dissolving container is used with laterally attached rotor, it can be generated with this measure a low-spin flow.

In speziellen Ausgestaltungen kann der Verschleißschutz dadurch verbessert werden, dass die Vorderseiten der Flügel oder der Arbeitsleisten mit auswechselbaren verschleißfesten Platten oder Streifen versehen sind. Es ist auch denkbar, die Arbeitsleisten insgesamt als auswechselbare Verschleißteile auszubilden.In specific embodiments, the wear protection can be improved by providing the front sides of the wings or the working strips with replaceable wear-resistant plates or strips. It is also conceivable to design the working strips in total as replaceable wear parts.

Die Erfindung wird erläutert an Hand von Zeichnungen. Dabei zeigen:

Figur 1:
eine Ansicht des Sieb- und Rotorbereiches eines erfindungsgemäßen Stofflösers;
Figur 2:
einen Schnitt gemäß Linie II in der Fig. 1;
Figur 3:
einen Schnitt gemäß Linie III in der Fig. 1;
Figur 4:
einen erfindungsgemäßen Stofflöser in geschnittener Seitenansicht;
Figur 5:
einen weiteren erfindungsgemäßen Stofflöser in Ansicht von oben mit seitlich angesetztem Rotor.
The invention will be explained with reference to drawings. Showing:
FIG. 1:
a view of the screen and rotor portion of a pulper according to the invention;
FIG. 2:
a section along line II in Fig. 1;
FIG. 3:
a section along line III in Fig. 1;
FIG. 4:
a pulper according to the invention in a sectional side view;
FIG. 5:
a further pulper according to the invention in top view with laterally attached rotor.

Figur 1 zeigt die Draufsicht auf einen Rotor für einen erfindungsgemäßen Stofflöser. Auch wenn ein solcher Rotor im Stofflöser nicht immer waagerecht liegt, also mit senkrechter Achse betrieben wird, wird hier von dieser speziellen Einbausituation ausgegangen und dementsprechend von "oben" und "unten" gesprochen. Der Rotor 2 ist mit insgesamt fünf geschwungenen Flügeln 3 versehen und wird bei Betrieb des Stofflösers in Rotationsrichtung 6 rotierend angetrieben. Einer der Flügel ist unterhalb der Arbeitsleiste 7 geschnitten dargestellt. In an sich bekannter Weise wirkt der Rotor mit einem Sieb 10 zusammen, von dem hier nur ein kleiner Teil gezeichnet ist. Dieses Sieb 10 ist in einem Abstand A zur Unterseite des Rotors montiert (siehe Fig. 2). Dabei ist der kleinste Abstand A möglichst gering, damit eine gute Auflösung erreicht wird und damit der Rotor bzw. seine Flügel 3 zur Freihaltung der Sieböffnungen 11 dienen können. Er liegt mit Vorteil bei wenigen Millimetern. Ist das Sieb auf der dem Rotor zugewandten Seite mit Leisten versehen, was die Auflösewirkung vorteilhaft verstärkt, ist der Abstand A von der Oberseite der Leiste aus zu messen.FIG. 1 shows the top view of a rotor for a pulper according to the invention. Even if such a rotor in the pulper is not always horizontal, that is operated with a vertical axis, it is assumed here of this special installation situation and accordingly spoken of "top" and "bottom". The rotor 2 is provided with a total of five curved wings 3 and is driven in rotation in the direction of rotation 6 during operation of the pulper. One of the wings is shown below the task bar 7 cut. In a manner known per se, the rotor acts with a sieve 10 together, of which only a small part is drawn here. This screen 10 is mounted at a distance A to the bottom of the rotor (see Fig. 2). In this case, the smallest distance A is as small as possible, so that a good resolution is achieved and thus the rotor or its wings 3 can serve to keep the screen openings 11 free. It lies with advantage with few millimeters. If the sieve is provided with strips on the side facing the rotor, which advantageously enhances the dissolving effect, the distance A is to be measured from the upper side of the strip.

Wichtig für die Lösung der erfindungsgemäßen Aufgabe ist auch, dass auf der Oberseite der geschwungenen Flügel 3 Arbeitsleisten 7 angebracht sind, die in Rotationsrichtung 6 vorstehen und z.B. einen rechteckigen Querschnitt haben können. Mit Vorteil können ihre Oberseite 16 und/oder Unterseite 15, zumindest zum überwiegenden Anteil senkrecht zur Rotorachse ausgerichtet sein. Ihre Axialerstreckung B ist im Vergleich zur Axialerstreckung der Flügel 3 mit Vorteil relativ gering, z.B. zwischen 5 und 20%. Mit Hilfe dieser Arbeitsleisten 7 kann die Papierstoffsuspension besonders wirksam aufgelöst werden. Thre Arbeitskanten können glatt oder mit einem Zackenprofil versehen sein. Mit der Tangente an den Umfangskreis 5 des Rotors bilden die Vorderseiten der Arbeitsleisten 7 einen Schnittwinkel β, der mindestens 40°, vorzugsweise mindestens 60° beträgt, was den Zerkleinerungseffekt verstärkt.Important for the solution of the object according to the invention is also that on the upper side of the curved wings 3 working strips 7 are mounted, which project in the direction of rotation 6 and e.g. can have a rectangular cross-section. Advantageously, their upper side 16 and / or lower side 15, at least predominantly aligned perpendicular to the rotor axis. Its axial extent B is advantageously relatively small compared to the axial extent of the wings 3, e.g. between 5 and 20%. With the help of this 7 Arbeitsleisten the pulp suspension can be resolved particularly effective. Thre working edges can be smooth or with a serrated profile. With the tangent to the circumferential circle 5 of the rotor, the front sides of the working strips 7 form a cutting angle β which is at least 40 °, preferably at least 60 °, which enhances the comminution effect.

Die Flügel 3 des Rotors haben an ihrer Vorderseite, also der Seite, die bei Rotation die Suspension treibt, unterhalb der Arbeitsleisten 7 eine vorn liegende Fläche 4, deren Projektion auf das Sieb 11 den Umfangskreis 5 mit einem Winkel α von höchstens 20° schneidet. Dadurch ist dieser Winkel α relativ spitz und hat wegen der ausgeprägten radialen Förderwirkung eine besondere hydraulische Wirkung beim Umtrieb der Suspension im Stofflöser. In Fig. 1 ist die Linie II eingetragen, entlang der ein Schnitt gelegt und in Fig. 2 dargestellt ist. Dieser Schnitt durch den Flügel 3, den Nabenkörper 9 des Rotors und das Sieb 10 zeigt insbesondere den Abstand A zwischen Unterseite des Rotors und Oberseite des Siebes 10. Ferner ist eine Abrundung 13 zwischen Arbeitsleisten 7 und Vorderkanten der Flügel 3 im radial äußeren Bereich des Rotors sichtbar (hier als Viertelellipse). Diese Abrundung hat hydraulische Vorteile und kann einen Krümmungsradius zwischen 20 und 60 % der Axialerstreckung des Flügels 3 aufweisen. Man erkennt auch, dass bei dem hier gezeigten Beispiel der Nabenkörper 9 des Rotors mit Hilfe von Schrauben 14 auf einem Wellenflansch 12 lösbar befestigt ist.The blades 3 of the rotor have on its front side, ie the side which drives the suspension during rotation, below the working strips 7, a front surface 4 whose projection on the wire 11 the circumferential circle 5 intersects at an angle α of at most 20 °. As a result, this angle α is relatively acute and has a special hydraulic effect when driving the suspension in the pulper because of the pronounced radial conveying action. In Fig. 1, the line II is entered, along which a section is laid and shown in Fig. 2. This section through the wing 3, the hub body 9 of the rotor and the screen 10 shows in particular the distance A between the underside of the rotor and the top of the screen 10. Further, a rounding 13 between working strips 7 and leading edges of the wings 3 in the radially outer region of the rotor visible (here as Quarter ellipse). This rounding has hydraulic advantages and may have a radius of curvature between 20 and 60% of the axial extent of the wing 3. It can also be seen that in the example shown here, the hub body 9 of the rotor is fastened releasably on a shaft flange 12 by means of screws 14.

In Fig. 3 ist ein Schnitt gemäß der Linie III (Fig. 1) sichtbar. Auch an dieser Stelle ist ein Teil der Arbeitsleiste 7 erkennbar, die sich allerdings mit einer nur noch kleinen Abrundung an der vorn liegenden Fläche 4 des Flügels 3 anschließt. In Siebnähe ist die Fläche 4 zu einer zum Sieb senkrechten Ebene parallel oder mit einem Neigungswinkel γ geneigt, wobei dieser Neigungswinkel γ vorteilhafterweise zwischen 15 und 30° liegt. Da diese Neigung so gerichtet ist, dass die dem Sieb ferner liegenden Teile der Fläche 4 in Rotationsrichtung vorstehen, wird eine Strömungskomponente in Richtung Sieb erzeugt, was in vielen Fällen die Auflösewirkung des Rotors verbessert.In Fig. 3 is a section along the line III (Fig. 1) visible. Also at this point, a part of the task bar 7 can be seen, which, however, followed by only a small rounding on the front surface 4 of the wing 3. In the vicinity of the sieve, the surface 4 is inclined to a plane perpendicular to the sieve parallel or with an inclination angle γ, said angle of inclination γ is advantageously between 15 and 30 °. Since this inclination is directed so that the parts of the surface 4 further away from the screen project in the direction of rotation, a flow component is produced in the direction of the screen, which in many cases improves the resolving action of the rotor.

Eine Ausführungsform eines Stofflösers, auf den die Erfindung angewendet werden kann, ist der stehende zylindrische oben offene Stofflöser gemäß Fig. 4, bei dem sich Sieb 10 und Rotor 2 im Bodenbereich befinden. Vorteilhafterweise hat der Rotor 2 eine Axialerstreckung E, die zwischen 10 % und 20 % des Durchmessers des Umfangskreises 5 beträgt. Der Stofflöser ist dann besonders für Konsistenzen zwischen 2 und 6 % geeignet. Beim Betrieb werden Papierstoff S und Wasser W in den Behälter 1 des Stofflösers eingetragen. Die fertige pumpfähige Suspension wird durch die Sieböffnungen des Siebes 10 hindurch als Gutstoff G abgezogen. Eine andere ebenfalls vorteilhafte Ausführungsform der Erfindung ist ein Stofflöser mit mindestens einem seitlich angebrachten Rotor gemäß Fig. 5 mit einem liegenden Behälter 1'. Ein liegender Behälter kann z.B. unter einer Papiermaschine zur Auflösung von Produktionsausschuss eingesetzt werden. Wegen der hydraulisch weniger günstigen Form eines liegenden Behälters 1' sind die Anforderungen an den Rotor allerdings besonders hoch. Als weitere Anwendung ist auch ein Sekundärstofflöser z.B. gemäß DE -A-23 45 735 denkbar, der mit einem in den Ansprüchen beschriebenen Rotor versehen ist.One embodiment of a pulper, to which the invention can be applied, is the standing, cylindrical, top open pulper according to FIG. 4, in which sieve 10 and rotor 2 are located in the bottom region. Advantageously, the rotor 2 has an axial extent E which is between 10% and 20% of the diameter of the circumferential circle 5. The pulper is then particularly suitable for consistencies between 2 and 6%. During operation, pulp S and water W are introduced into the container 1 of the pulper. The finished pumpable suspension is withdrawn through the screen openings of the screen 10 as accept G. Another likewise advantageous embodiment of the invention is a pulper with at least one laterally mounted rotor according to FIG. 5 with a horizontal container 1 '. A horizontal container may e.g. be used under a paper machine for the dissolution of production scrap. Due to the hydraulically less favorable shape of a horizontal container 1 ', however, the requirements for the rotor are particularly high. As a further application, a secondary pulper, e.g. according to DE -A-23 45 735 conceivable, which is provided with a rotor described in the claims.

Claims (19)

Stofflöser zur Zerkleinerung und Suspendierung von Papierstoff (S) - mit einem Behälter (1) zur Aufnahme von Wasser und Papierstoff (S) und - mit mindestens einem im Behälter (1) angeordneten antreibbaren Rotor (2), - der mindestens zwei Flügel zum Umwälzen einer im Behälter enthaltenen Suspension aufweist, um dabei den eingetragenen Papierstoff zu zerkleinern und im Wasser zu suspendieren sowie - mit mindestens einem Sieb (10), dessen Siebfläche durch den bewegten Rotor (2) vollständig oder größtenteils überstrichen wird, dadurch gekennzeichnet, - dass der Rotor (2) mit geschwungenen Flügeln (3) versehen ist, deren in Rotationsrichtung (6) vorne liegende Fläche (4) am Umfangskreis (5) mit diesem einen Winkel (α) von höchstens 20° bildet und - deren Oberseite mit in Rotationsrichtung (6) vorstehenden Arbeitsleisten (7) versehen ist, deren Schnittwinkel (β) mit dem Umfangskreis (5) mindestens 40°, vorzugsweise mindestens 60°, beträgt. Pulper for shredding and suspending pulp (S) - With a container (1) for receiving water and pulp (S) and - With at least one in the container (1) arranged drivable rotor (2), - Having at least two wings for circulating a suspension contained in the container to thereby comminute the introduced pulp and to suspend in water and - having at least one sieve (10) whose screen surface is completely or largely swept by the moving rotor (2), characterized, - That the rotor (2) is provided with curved wings (3) whose front in the direction of rotation (6) surface (4) on the circumferential circle (5) forms with this an angle (α) of at most 20 °, and - The top is provided with in the direction of rotation (6) above working strips (7) whose intersection angle (β) with the circumferential circle (5) at least 40 °, preferably at least 60 °. Stofflöser nach Anspruch 1,
dadurch gekennzeichnet,
dass der Behälter (1) für den Eintrag des Papierstoffs (S) oben offen ist.Pulper according to claim 1,
characterized,
that the container (1) for the entry of the pulp (S) is open at the top. Stofflöser nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
dass das Sieb (10) eben und kreisringförmig ist.Pulper according to claim 1 or 2,
characterized,
that the sieve (10) is flat and circular. Stofflöser nach Anspruch 1, 2 oder 3,
dadurch gekennzeichnet,
dass der Stofflöser ein einziges ebenes Sieb (10) aufweist, das durch den bewegten Rotor (2) teilweise oder vollständig überstrichen wird.Pulper according to claim 1, 2 or 3,
characterized,
that the pulper comprises a single planar sieve (10) which is partially or completely swept by the moving rotor (2). Stofflöser nach Anspruch 1, 2, 3 oder 4,
dadurch gekennzeichnet,
dass der kleinste Abstand (A) zwischen Sieb (10) und der dem Sieb zugewandten Seite der Flügel (3) zwischen 1 und 20 mm beträgt.Pulper according to claim 1, 2, 3 or 4,
characterized,
that the smallest distance (A) between the screen is (10) and facing the wire side of the leaf (3) is between 1 and 20 mm. Stofflöser nach einem der voran stehenden Ansprüche,
dadurch gekennzeichnet,
dass die in Rotationsrichtung vorn liegenden Arbeitskanten (8) der Arbeitsleisten (7) gerade sind.Pulper according to one of the preceding claims,
characterized,
in that the working edges (8) of the working strips (7) lying in the direction of rotation are straight. Stofflöser nach einem der voran stehenden Ansprüche,
dadurch gekennzeichnet,
dass die Axialerstreckung (B) der Arbeitsleisten (7) am Umfangskreis (5) zwischen 5 und 20 % der Axialerstreckung der Flügel (3) beträgt.Pulper according to one of the preceding claims,
characterized,
that the axial extent (B) between 5 and 20% is the working ledges (7) at the circumferential circle (5) of the axial extension of the wing (3). Stofflöser nach einem der voran stehenden Ansprüche,
dadurch gekennzeichnet,
dass die maximale Radialerstreckung (C) der vorstehenden Arbeitsleisten (7) zwischen 5 und 30 % des Radius' des Umfangkreises (5) beträgt.Pulper according to one of the preceding claims,
characterized,
that the maximum radial extent (C) of the preceding working ledges (7) between 5 and 30% of the radius of the circumferential circle (5). Stofflöser nach einem der voran stehenden Ansprüche,
dadurch gekennzeichnet,
dass Oberseite (16) und/oder Unterseite (15) der Arbeitsleisten (7) im Wesentlichen eben und so ausgerichtet sind, dass sie gegenüber einer zur Achse des Rotors (2) senkrecht stehenden Ebene nicht oder maximal um 5° geneigt sind.Pulper according to one of the preceding claims,
characterized,
the upper side (16) and / or lower side (15) of the working strips (7) are substantially flat and oriented in such a way that they face one opposite the other Axis of the rotor (2) vertical plane are not inclined or maximally by 5 °. Stofflöser nach einem der voran stehenden Ansprüche,
dadurch gekennzeichnet,
dass die in Rotationsrichtung (6) vorn liegende Fläche (4) der Flügel (3) gegenüber der Axialrichtung des Rotors (2) nicht geneigt ist.Pulper according to one of the preceding claims,
characterized,
in that the surface (4) of the vanes (3) lying in the direction of rotation (6) is not inclined with respect to the axial direction of the rotor (2). Stofflöser nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet,
dass die in Rotationsrichtung (6) vorn liegende Fläche (4) der Flügel (3) gegenüber der Axialrichtung des Rotors (2) einen Neigungswinkel (γ) aufweist, der zwischen 1° und 45°, vorzugsweise 15° und 30°, liegt und so gerichtet ist, dass die dem Sieb ferner liegenden Teile dieser Vorderseite in Rotationsrichtung (6) vorstehen.Pulper according to one of claims 1 to 9,
characterized,
that the area of front in the direction of rotation (6) (4) has an angle of inclination (γ) of the wings (3) relative to the axial direction of the rotor (2) between 1 ° and 45 °, preferably 15 ° and 30 °, is located and is directed so that the screen further lying parts of this front project in the direction of rotation (6). Stofflöser nach einem der voran stehenden Ansprüche,
dadurch gekennzeichnet,
dass der Übergang zwischen Arbeitsleisten (7) und Vorderkanten der Flügel (3) im radial äußeren Bereich abgerundet ist.Pulper according to one of the preceding claims,
characterized,
that the transition between working strips (7) and leading edges of the wings (3) in the radially outer region is rounded. Stofflöser nach Anspruch 12,
dadurch gekennzeichnet,
dass die Abrundung (13) einen Krümmungsradius aufweist, der zwischen 20 und 60 % der Axialerstreckung des Flügels (3) beträgt.Pulper according to claim 12,
characterized,
in that the rounding (13) has a radius of curvature which is between 20 and 60% of the axial extent of the wing (3). Stofflöser nach Anspruch 12,
dadurch gekennzeichnet,
dass die Abrundung (13) einer Viertel-Ellipse entspricht.Pulper according to claim 12,
characterized,
that the rounding (13) corresponds to a quarter-ellipse. Stofflöser nach Anspruch 12, 13 oder 14,
dadurch gekennzeichnet,
dass die Abrundung (13) im radial äußeren Bereich des Flügels (3) am stärksten ist und zum radial inneren Bereich hin stetig abnimmt.Pulper according to claim 12, 13 or 14,
characterized,
that the rounding (13) in the radially outer region of the wing (3) is strongest and steadily decreases toward the radially inner region. Stofflöser nach einem der voran stehenden Ansprüche,
dadurch gekennzeichnet,
dass die Arbeitsleisten (7) aus hochverschleißfestem Material, insbesondere Hartmetall, bestehen.Pulper according to one of the preceding claims,
characterized,
that the working ledges (7) of highly wear resistant material, in particular hard metal exist. Stofflöser nach einem der voran stehenden Ansprüche,
dadurch gekennzeichnet,
dass die Arbeitsleisten (7) lösbar an den Flügeln (3) befestigt sind.Pulper according to one of the preceding claims,
characterized,
in that the working strips (7) are detachably fastened to the wings (3). Stofflöser nach einem der voran stehenden Ansprüche,
dadurch gekennzeichnet,
dass die maximale Axialerstreckung (E) des Rotors (2) einen Wert zwischen 8 % und 35 % des Durchmessers des Umfangskreises (5), vorzugsweise zwischen 10 % und 20 %, aufweist.Pulper according to one of the preceding claims,
characterized,
that the maximum axial extent (E) of the rotor (2) has a value between 8% and 35% of the diameter of the circumferential circle (5), preferably between 10% and 20%. Rotor für einen Stofflöser zur Zerkleinerung und Suspendierung von Papierstoff (S) in Wasser (W) nach einem der voran stehenden Ansprüche.Rotor for a pulper for comminution and suspension of pulp (S) in water (W) according to one of the preceding claims.
EP06000661A 2005-02-22 2006-01-13 Pulper for disintegration and suspension of paper pulp and rotor suitable for such a pulper Active EP1693505B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005007972A DE102005007972A1 (en) 2005-02-22 2005-02-22 Pulper for comminution and suspension of pulp and rotor for such a pulper

Publications (2)

Publication Number Publication Date
EP1693505A1 true EP1693505A1 (en) 2006-08-23
EP1693505B1 EP1693505B1 (en) 2008-11-26

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ID=36498965

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Country Status (4)

Country Link
EP (1) EP1693505B1 (en)
AT (1) ATE415514T1 (en)
DE (2) DE102005007972A1 (en)
ES (1) ES2318591T3 (en)

Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN101912743A (en) * 2010-08-10 2010-12-15 杭州三拓印染设备技术开发有限公司 Blade of pulping machine
WO2011045094A2 (en) 2009-10-13 2011-04-21 Voith Patent Gmbh Pulper
WO2012116928A1 (en) * 2011-03-03 2012-09-07 Voith Patent Gmbh Rotor
CN112004967A (en) * 2018-04-23 2020-11-27 福伊特专利有限公司 Pulper

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103015242B (en) * 2013-01-22 2015-05-13 富民宝地纸业有限公司 Efficient rotating cutter device for waste paper pulping cutting

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DE2345735A1 (en) 1973-08-27 1975-03-20 Escher Wyss Gmbh DUST LOOSER
DE2500860A1 (en) 1974-01-11 1975-07-17 Black Clawson Co DIGESTION DEVICE
US4480796A (en) 1982-01-25 1984-11-06 Beloit Corporation Pulping apparatus including improved rotor
DE3638993C2 (en) 1985-12-31 1989-10-26 Yhtyneet Paperitehtaat Oy Jylhaevaara, Valkeakoski, Fi
DE10254544A1 (en) 2002-09-26 2004-04-08 Edelstahl Jansen Gmbh Rotor, for a pulper, has hardened guides fitted to the leading edges of the rotor blades, which resist wear and are rapidly replaced on site

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DE844116C (en) 1947-12-08 1952-07-17 Leje & Thurne Aktiebolag Shredding machine for the treatment of cellulose and / or waste paper
DE2345735A1 (en) 1973-08-27 1975-03-20 Escher Wyss Gmbh DUST LOOSER
DE2500860A1 (en) 1974-01-11 1975-07-17 Black Clawson Co DIGESTION DEVICE
US4480796A (en) 1982-01-25 1984-11-06 Beloit Corporation Pulping apparatus including improved rotor
DE3638993C2 (en) 1985-12-31 1989-10-26 Yhtyneet Paperitehtaat Oy Jylhaevaara, Valkeakoski, Fi
DE10254544A1 (en) 2002-09-26 2004-04-08 Edelstahl Jansen Gmbh Rotor, for a pulper, has hardened guides fitted to the leading edges of the rotor blades, which resist wear and are rapidly replaced on site

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011045094A2 (en) 2009-10-13 2011-04-21 Voith Patent Gmbh Pulper
WO2011045094A3 (en) * 2009-10-13 2011-06-16 Voith Patent Gmbh Pulper
CN102575421A (en) * 2009-10-13 2012-07-11 沃依特专利有限责任公司 Pulper
EP2568078A1 (en) * 2009-10-13 2013-03-13 Voith Patent GmbH Pulper
US8991733B2 (en) 2009-10-13 2015-03-31 Voith Patent Gmbh Pulper
CN102575421B (en) * 2009-10-13 2016-12-07 沃依特专利有限责任公司 Pulper
CN101912743A (en) * 2010-08-10 2010-12-15 杭州三拓印染设备技术开发有限公司 Blade of pulping machine
WO2012116928A1 (en) * 2011-03-03 2012-09-07 Voith Patent Gmbh Rotor
AT13645U1 (en) * 2011-03-03 2014-05-15 Voith Patent Gmbh rotor
CN112004967A (en) * 2018-04-23 2020-11-27 福伊特专利有限公司 Pulper
CN112004967B (en) * 2018-04-23 2022-12-09 福伊特专利有限公司 Pulper

Also Published As

Publication number Publication date
DE502006002152D1 (en) 2009-01-08
DE102005007972A1 (en) 2006-08-24
EP1693505B1 (en) 2008-11-26
ATE415514T1 (en) 2008-12-15
ES2318591T3 (en) 2009-05-01

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