EP2238291B1 - Pulper for pulverizing and suspending paper material - Google Patents

Pulper for pulverizing and suspending paper material Download PDF

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Publication number
EP2238291B1
EP2238291B1 EP08870961.3A EP08870961A EP2238291B1 EP 2238291 B1 EP2238291 B1 EP 2238291B1 EP 08870961 A EP08870961 A EP 08870961A EP 2238291 B1 EP2238291 B1 EP 2238291B1
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EP
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Prior art keywords
container
pulper
pulper according
flow barrier
rotor
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EP08870961.3A
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German (de)
French (fr)
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EP2238291A1 (en
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Jochen Krebs
Wolfgang Mueller
Naoyuki Iwashige
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Voith Patent GmbH
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Voith Patent GmbH
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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
    • D21B1/345—Pulpers

Definitions

  • the invention relates to a pulper for comminution and suspension of pulp according to the preamble of claim 1 and as from EP 1 731 663 A1 known.
  • Pulpers of this type are mainly used to suspend air-dry pulp or waste paper.
  • the registered material is intensively mixed with water in large pieces, sheets or pressed bales, for which a mixing and crushing rotor is usually used.
  • a pulper consists essentially of a container for the suspension and the already mentioned rotor. In many cases, it also contains a sieve in the bottom area, through which the suspension can be pumped.
  • Flow installations on the container wall are, for example, in the US2002 / 166910 A1 , of the DE 33 04 958 A1 as well as the EP-A-0 122 991 described.
  • the invention is based on the object to improve the known pulper without significant overhead, possibly in the form of a conversion of an existing pulper, in particular, the collection of the material to be improved.
  • the pulper should be able to dissolve faster and / or more economically.
  • the cut in side view drawn pulper the Fig. 1 is a typical form of the prior art.
  • the pulp S is fed into a container 1 together with water W.
  • a mixture of water and pulp which is already partially crushed.
  • This thus provided with coarse and fine solids suspension is displaced by the rotor 2 arranged centrally in the bottom region of the container 1 in drive.
  • the rotor is driven by a motor, not shown.
  • Essential for this pulper according to the invention is that on the inside of the side wall 5 of the container 1 is a substantially vertical Flow barrier 8 is located. This extends with a maximum radial projection F into the trough, which amounts to at least 6%, preferably at least 15%, of the diameter D1 of the container 1.
  • the flow barrier can be formed as a rectangular angle profile which extends perpendicularly from the bottom 7 of the container 1 to above the suspension mirror 9 forming during operation.
  • the front 4 of this profile is rounded.
  • the suspension is thus pulled down by the rotor 2, so that approximately along the center line 3 of the rotor 2, a downward flow is formed.
  • the suspension is conveyed radially outwardly at the bottom 7 of the container 1 and thereby reaches its side wall 5. Overall, this results in a circulation flow. It is advantageous if the center line 3 of the rotor 2 is vertical and aligned with the container 1. As is known, in this described dissolution process by hydraulic forces and by contact between the rotor 2 and pulp, the crushing and suspension of the pulp causes.
  • Paper pulp pieces which have been sufficiently comminuted can, as shown here, pass through a sieve plate 6 into a chamber 10 (eg an annular channel) and be removed as a pulp suspension P.
  • a pulper can be operated both continuously and discontinuously.
  • the screen plate 6 is not essential.
  • the usual consistency, ie the solids content in The suspension P is usually about 2 to 8%, preferably 4 to 7%. It is often possible by the invention, an advantageous increase in the consistency by about 1% in the resolution.
  • FIG. 2 For further illustration shows the Fig. 2 the pulper of Fig. 1 in top view.
  • the holes of the screen plate 6 are not shown. It can be seen that only a single flow barrier 8 with the dimensions already indicated is present.
  • the in Fig. 3 The inventive pulper shown differs from that of Fig. 1 essentially in that the flow barrier 8 'is provided with a front side 4', which runs obliquely with respect to the vertical at an angle ⁇ , so that at the bottom 7 of the pulper the radial projection is smaller than in the upper region, at which the maximum radial projection F is located. This is above the level 11, with which the pulper is operated as intended.
  • Another possibility is to give the bottom 7 'the shape of two concentric truncated cones 12 and 13 ( Fig. 7 ). In this case, the lower truncated cone 12 is flatter than the overlying truncated cone 13th
  • a flow barrier 8 in the dimensions indicated causes a strong vertical shear component to be generated on its contour which deflects the suspension to the center of the container. This creates a very well-trained intake cone in the center of rotation of the trough, which has a very favorable effect on the collection of registered raw material. In this way, the power consumption of the drive is reduced, often can be set higher fuel density and / or even better resolution can be achieved. This effect can not be compared with that of conventional reinforcing profiles on the inner wall of a pulper whose radial extent amounts to only a few percent of the trough diameter. Their contribution to the dissolving effect of the pulper is small
  • the flow barrier 8 ' is provided with a cover 9' which is inclined relative to the horizontal and which lies above the filling level 11, the inclination leading to the outflow of material.
  • Fig. 5 shows a section through the flow barrier 8 'on the line V in Fig. 3 ,
  • Fig. 8 can also be an inclination of the flow barrier in the circumferential direction, preferably in the direction of rotation of the rotor 2, be advantageous, so that the upper part of the flow barrier in the circumferential direction offset from the lower part (at the bottom of the pulper) is. This inclination can further improve the hydraulic properties.
  • An inventive pulper (of the type, as in Fig. 3
  • the rotor 2 has on its moving wings an outer diameter D2 of 1000 mm. He runs close to a flat annular sieve 6, the openings of which he keeps clear of blockages.
  • the flow barrier 8 is mounted, in the form of a right angle WinKelpröfils which extends from the bottom 7 to about the upper edge of the container 1 and projects into the container.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Description

Die Erfindung betrifft einen Stofflöser zur Zerkleinerung und Suspendierung von Papierstoff gemäß dem Oberbegriff des Anspruchs 1 und wie aus EP 1 731 663 A1 bekannt.The invention relates to a pulper for comminution and suspension of pulp according to the preamble of claim 1 and as from EP 1 731 663 A1 known.

Stofflöser dieser Art werden hauptsächlich angewendet, um lufttrockenes Zellstoffmaterial oder Altpapier in Suspension zu bringen. Das eingetragene Material wird in großen Stücken, Bahnen oder gepressten Ballen mit Wasser intensiv vermischt, wozu in der Regel ein Misch-und Zerkteinerungsrotor eingesetzt wird. Ein Stofflöser besteht im Wesentlichen aus einem Behälter für die Suspension und dem schon genannten Rotor. In vielen Fällen enthält er auch ein Sieb im Bodenbereich, durch das die Suspension abgepumpt werden kann.Pulpers of this type are mainly used to suspend air-dry pulp or waste paper. The registered material is intensively mixed with water in large pieces, sheets or pressed bales, for which a mixing and crushing rotor is usually used. A pulper consists essentially of a container for the suspension and the already mentioned rotor. In many cases, it also contains a sieve in the bottom area, through which the suspension can be pumped.

Verständlicherweise werden solche Stofflöser ständig optimiert, wobei im Wesentlichen eine schnelle und kraftwirtschaftliche Auflösung angestrebt wird. Als Standardtyp für einen Stofflöser hat sich ein senkrecht stehender zylindrischer Behälter mit einem konzentrischen Rotor im Bodenbereich durchgesetzt In diesem 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 zentralen Bereich der Stoff vom Rotor nach unten angesaugt und im Bodenbereich radial nach außen gedrückt wird, wodurch sich eine Umtriebsströmung ergibt. Es sind auch Strömungsmaßnahmen bekannt, um diese Umfriebsströmung zu steuern. So wird z.B. durch mehrere Strömungseinbauten (Schikanen) an der Behälterwand die Umfangsströmung gebremst, da diese oft nur einen geringen Beitrag zur Auflösung bringt. Die Förderung des eigentlichen Umtriebs, d.h. der wiederholte Transport des aufzulösenden Stoffes in den Rotorbereicht bringt dagegen eine Verbesserung des Effektes. Auch wird angestrebt, den frisch eingetragenen Stoff möglichst schnell in die Suspension einzuziehen. Aus diesen Gründen ist auch schon viel Entwicklung an den Rotoren und Behältern der Stofflöser betrieben worden.Understandably, such pulpers are constantly being optimized, with the aim of achieving a fast and efficient dissolution. As a standard type for a pulper, a vertical cylindrical container with a concentric rotor in the bottom area has prevailed in this container water and the substance to be dissolved is added from above and generated by means of the rotor a Trombenströmung in the suspension, ie in the central region of the Material is sucked from the rotor down and pressed radially outward in the bottom region, resulting in a Umtriebsströmung. There are also flow measures known to control this Umfriebsströmung. Thus, for example, by several flow installations (baffles) on the vessel wall, the circumferential flow braked, as this often brings only a small contribution to the resolution. The promotion of the actual Umtriebs, ie the repeated transport of the substance to be dissolved in the Rotorbereicht, however, brings an improvement of the effect. It is also desirable to collect the freshly introduced substance as quickly as possible in the suspension. For these reasons, much development has been carried out on the rotors and containers of pulpers.

Strömungseinbauten an der Behälterwand werden beispielsweise in der US2002/166910 A1 , der DE 33 04 958 A1 sowie der EP-A-0 122 991 beschrieben.Flow installations on the container wall are, for example, in the US2002 / 166910 A1 , of the DE 33 04 958 A1 as well as the EP-A-0 122 991 described.

In der DE 196 01 497 A1 ist vorgeschlagen worden, den Behälter des Stofflösers eckig zu gestalten, um den Stoffeinzug zu verbessern. Eine weitere Verbesserung sollte die asymmetrische Anordnung des Rotors bewirken. Dieser Stofflöser fand jedoch keine größere Anwendung. Aus der EP 1 398 410 A1 ist ein Stofflöser bekannt, bei dem der Behälter einen senkrechten geraden Abschnitt aufweist.In the DE 196 01 497 A1 It has been proposed to make the container of the pulper angular to improve the Stoffeinzug. A further improvement should cause the asymmetric arrangement of the rotor. However, this pulper found no major application. From the EP 1 398 410 A1 a pulper is known in which the container has a vertical straight section.

Einen anderen Versuch, Stofflöser dieser Art zu verbessern, zeigt die DE 36 38 993 C2 . Demnach wird die Strömung der Suspension mit Hilfe eines seitlich angebrachten Rotors erzeugt. Auch die Schrägstellung der Rötorachse wurde schon durchgerührt, z.B. bei einem in der DE 32 34 702 C2 gezeigten Stofflöser, bei dem ein relativ hoch gebauter Rotor einen spitzen Winkel gegen die Vertikale einnimmt.Another attempt to improve pulpers of this kind, shows the DE 36 38 993 C2 , Accordingly, the flow of the suspension is generated by means of a laterally mounted rotor. The inclination of the Rötorachse was already stirred, for example, in a in the DE 32 34 702 C2 shown pulper, in which a relatively high-built rotor occupies an acute angle to the vertical.

Zur Verbesserung des Umtriebes sind auch schon unkonvehtionelle Wege beschritten worden, wie z.B. gemäß DE 34 29 514 C2 , eine Mehrzahl von aufwändigen Rotoren innerhalb desselben Stofflöserbehälters:To improve the turnover even unkonvehtionelle ways have been taken, such as according to DE 34 29 514 C2 , a plurality of elaborate rotors within the same pulper container:

Der Erfindung liegt die Aufgabe zu Grunde, die bekannten Stofflöser ohne wesentlichen Mehraufwand, eventuell auch in Form eines Umbaus eines bereits existierenden Stofflösers zu verbessern, wobei insbesondere der Einzug des Materials verbessert werden soll. Der Stofflöser soll schneller und/oder wirtschaftlicher auflösen können.The invention is based on the object to improve the known pulper without significant overhead, possibly in the form of a conversion of an existing pulper, in particular, the collection of the material to be improved. The pulper should be able to dissolve faster and / or more economically.

Diese Aufgabe wird an einem im Oberbegriff des Anspruchs 1 beschriebenen Stofflöser durch die im Kennzeichen genannten Maßnahmen gelöst.This object is achieved on a pulper described in the preamble of claim 1 by the measures mentioned in the plate.

Es hat sich nämlich gezeigt, dass durch die besonderte Form des Behälters ein schnellerer Einzug des eingetragenen Papierstoffes und eine Verbesserung des Umtriebes möglich ist. Der gesamte Auflösevorgang läuft schneller ab, was eine bessere Maschinennutzung sowie eine Energieersparnis bewirkt. Der verbesserte Auflöseeffekt lässt sich durch die schnellere Abnahme des Stippengehaltes in der Fasersuspension feststellen. Dabei ist der geringe Aufwand für die erfindungsgemäßen Maßnahmen ein großer Vorteil. Es ist auch möglich, einen Stofflöser, der bereits am Ort seines Betriebes aufgestellt ist, nachträglich mit der Erfindung umzurüsten. Anders als z.B. bei dem aus der EP 1 731 663 A1 bekannten Stofflöser ist der Rotor zentral im Behälter angeordnet, was die ganze Konstruktion vereinfacht.It has been shown that a faster collection of the registered pulp and an improvement of the turnover is possible by the special shape of the container. The entire dissolution process is faster, resulting in better machine utilization and energy savings. The improved dissolution effect can be determined by the faster decrease of the speck content in the fiber suspension. The low cost of the measures according to the invention is a great advantage. It is also possible to retrofit a pulper, which is already installed at the site of its operation, with the invention. Different than eg from the EP 1 731 663 A1 Known pulper, the rotor is centrally located in the container, which simplifies the whole construction.

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

Figur 1:
Schematisch einen Schnitt durch einen Stofflöser gemäb dem Stand der Technik,
Figur 2:
Stofflöser der Fig. 1, Ansicht von oben;
Figur 3:
eine erfindungsgemäße Variante in Seitenansicht;
Figur 4:
Draufsicht auf eine Strömungsbarriere;
Figur 5:
Schnitt durch eine Strömungsbarriere;
Figur 6:
eine weitere mögliche Form der Strömungsbarriere;
Figur 7:
Stofflöser mit doppelkonischem Boden;
Figur 8:
Eine in Bewegungsrichtung geneigte Strömungsbarriere.
The invention will be explained with reference to drawings. Showing:
FIG. 1:
Schematically a section through a pulper gemäbäb the prior art,
FIG. 2:
Pulper the Fig. 1 , View from above;
FIG. 3:
a variant of the invention in side view;
FIG. 4:
Top view of a flow barrier;
FIG. 5:
Section through a flow barrier;
FIG. 6:
another possible form of flow barrier;
FIG. 7:
Pulper with double conical bottom;
FIG. 8:
A flow barrier inclined in the direction of movement.

Der geschnitten in Seitenansicht gezeichnete Stofflöser der Fig. 1 ist eine typische Form des Stands der Technik. Bei Betrieb des Stofflösers wird der Papierstoff S zusammen mit Wasser W in einen Behälter 1 eingegeben. Dann bildet sich im Behälter 1 eine Mischung aus Wasser und Papierstoff, welcher teilweise schon zerkleinert ist. Diese also mit groben und feinen Feststoffen versehene Suspension wird durch den zentral im Bodenbereich des Behälters 1 angeordneten Rotor 2 in Umtrieb versetzt. Der Rotor wird durch einen nicht gezeigten Motor angetrieben. Wesentlich für diesen erfindungsgemäßen Stofflöser ist, dass an der Innenseite der Seitenwand 5 des Behälters 1 sich eine im Wesentlichen vertikale Strömungsbarriere 8 befindet. Diese reicht mit einem maximalen Radialvorsprung F in den Trog hinein, der mindestens 6 %, vorzugsweise mindestens 15 %, des Durchmessers D1 des Behälters 1 beträgt. In einer einfachen Ausführung kann die Strömungsbarriere als rechtwinkeliges Winkelprofil ausgebildet sein, das sich senkrecht vom Boden 7 des Behälters 1 bis über den sich im Betrieb ausbildenden Suspensionsspiegel 9 erstreckt. Die Vorderseite 4 dieses Profiles ist dabei abgerundet. Es sind auch andere Formen denkbar..The cut in side view drawn pulper the Fig. 1 is a typical form of the prior art. In operation of the pulper, the pulp S is fed into a container 1 together with water W. Then in the container 1, a mixture of water and pulp, which is already partially crushed. This thus provided with coarse and fine solids suspension is displaced by the rotor 2 arranged centrally in the bottom region of the container 1 in drive. The rotor is driven by a motor, not shown. Essential for this pulper according to the invention is that on the inside of the side wall 5 of the container 1 is a substantially vertical Flow barrier 8 is located. This extends with a maximum radial projection F into the trough, which amounts to at least 6%, preferably at least 15%, of the diameter D1 of the container 1. In a simple embodiment, the flow barrier can be formed as a rectangular angle profile which extends perpendicularly from the bottom 7 of the container 1 to above the suspension mirror 9 forming during operation. The front 4 of this profile is rounded. There are also other forms conceivable.

Die Suspension wird also vom Rotor 2 so nach unten gezogen, dass etwa längs der Mittellinie 3 des Rotors 2 eine abwärts gerichtete Strömung entsteht. In Folge der Pumpwirkung des Rotors wird die Suspension am Boden 7 des Behälters 1 radial nach außen gefördert und gelangt dadurch zu dessen Seitenwand 5. Insgesamt entsteht dadurch eine Zirkulationsströmung. Dabei ist es günstig, wenn die Mittellinie 3 des Rotors 2 senkrecht steht und mit der des Behälters 1 fluchtet. Wie an sich bekannt, wird bei diesem beschriebenen Auflösevorgang durch hydraulische Kräfte und durch Kontakt zwischen Rotor 2 und Papierstoff die Zerkleinerung und Suspendierung des Papierstoffs bewirkt. Papierstoffteile, die genügend zerkleinert sind, können - wie hier gezeigt - durch ein Siebblech 6 hindurch in eine Kammer 10 (z.B. einen Ringkanal) gelangen und als faserstoffhaltige Suspension P abgeführt werden. Ein solcher Stofflöser kann sowohl kontinuierlich als auch diskontinuierlich betrieben werden. Das Siebblech 6 ist nicht unbedingt erforderlich. Die übliche Konsistenz, also der Feststoffanteil in der Suspension P beträgt in der Regel um die 2 bis 8 %, vorzugsweise 4 bis 7%. Dabei ist durch die Erfindung oft eine vorteilhafte Anhebung der Konsistenz um ca. 1 % bei der Auflösung möglich.The suspension is thus pulled down by the rotor 2, so that approximately along the center line 3 of the rotor 2, a downward flow is formed. As a result of the pumping action of the rotor, the suspension is conveyed radially outwardly at the bottom 7 of the container 1 and thereby reaches its side wall 5. Overall, this results in a circulation flow. It is advantageous if the center line 3 of the rotor 2 is vertical and aligned with the container 1. As is known, in this described dissolution process by hydraulic forces and by contact between the rotor 2 and pulp, the crushing and suspension of the pulp causes. Paper pulp pieces which have been sufficiently comminuted can, as shown here, pass through a sieve plate 6 into a chamber 10 (eg an annular channel) and be removed as a pulp suspension P. Such a pulper can be operated both continuously and discontinuously. The screen plate 6 is not essential. The usual consistency, ie the solids content in The suspension P is usually about 2 to 8%, preferably 4 to 7%. It is often possible by the invention, an advantageous increase in the consistency by about 1% in the resolution.

Zur weiteren Veranschaulichung zeigt die Fig. 2 den Stofflöser der Fig. 1 in Ansicht von oben. Dabei sind die Löcher des Siebblechs 6 nicht dargestellt. Man erkennt, dass lediglich eine einzige Strömungsbarriere 8 mit den bereits angegebenen Abmessungen vorhanden ist.For further illustration shows the Fig. 2 the pulper of Fig. 1 in top view. The holes of the screen plate 6 are not shown. It can be seen that only a single flow barrier 8 with the dimensions already indicated is present.

Der in Fig. 3 gezeigte erfindungsgemäße Stofflöser unterscheidet sich von dem der Fig. 1 im Wesentlichen dadurch, dass die Strömungsbarriere 8' mit einer Vorderseite 4' versehen ist, die gegenüber der Vertikalen in einem Winkel δ schräg verläuft, so dass am Boden 7 des Stofflösers der Radialvorsprung kleiner ist als im oberen Bereich, an dem sich der maximale Radialvorsprung F befindet. Dieser liegt oberhalb des Füllstandes 11, mit dem der Stofflöser bestimmungsgemäß betrieben wird. Darüber hinaus ist bei dem in Fig. 3 gezeigten Beispiel auch der Bereich des Bodens etwas anders ausgestaltet, derart dass der Boden mit einem Bodenwinkel α = 30° bis an die einen Ringkanal bildende Kammer 10 heranreicht. Eine weitere Möglichkeit liegt darin, dem Boden 7' die Form zweier konzentrischer Kegelstümpfe 12 und 13 zu geben (Fig. 7). Dabei ist der unten liegende Kegelstumpf 12 flacher als der darüber liegende Kegelstumpf 13.The in Fig. 3 The inventive pulper shown differs from that of Fig. 1 essentially in that the flow barrier 8 'is provided with a front side 4', which runs obliquely with respect to the vertical at an angle δ, so that at the bottom 7 of the pulper the radial projection is smaller than in the upper region, at which the maximum radial projection F is located. This is above the level 11, with which the pulper is operated as intended. In addition, at the in Fig. 3 also shown, the area of the bottom designed somewhat differently, so that the bottom with a bottom angle α = 30 ° comes up to the one annular channel forming chamber 10. Another possibility is to give the bottom 7 'the shape of two concentric truncated cones 12 and 13 ( Fig. 7 ). In this case, the lower truncated cone 12 is flatter than the overlying truncated cone 13th

Eine Strömungsbarriere 8 in den angegebenen Dimensionen führt dazu, dass an ihrer Kontur eine starke Vertikalschubkomponente erzeugt wird, die die Suspension zum Zentrum des Behälters umlenkt. Dadurch entsteht ein sehr gut ausgebildeter Einzugskegel im Rotationszentrum des Troges, welcher sich sehr günstig auf das Einziehen von eingetragenem Rohstoff auswirkt. Auf diese Weise reduziert sich der Energieverbrauch des Antriebs, oft kann eine höhere Betriebsstoffdichte eingestellt und/oder eine noch bessere Auflösung erreicht werden. Diese Wirkung ist nicht zu vergleichen mit der von üblichen Verstärkungsprofilen an der Innenwand eines Stofflösers, deren Radialerstreckung nur sehr wenige Prozent des Trogdurchmessers beträgt. Deren Beitrag zur Auflösewirkung des Stofftösers ist geringA flow barrier 8 in the dimensions indicated causes a strong vertical shear component to be generated on its contour which deflects the suspension to the center of the container. This creates a very well-trained intake cone in the center of rotation of the trough, which has a very favorable effect on the collection of registered raw material. In this way, the power consumption of the drive is reduced, often can be set higher fuel density and / or even better resolution can be achieved. This effect can not be compared with that of conventional reinforcing profiles on the inner wall of a pulper whose radial extent amounts to only a few percent of the trough diameter. Their contribution to the dissolving effect of the pulper is small

Die Fig. 4 zeigt die Draufsicht auf die Strömungsbarriere 8' etwas genauer, insbesondere ist der Öffnungswinkel β hier = 90° eingetragen. Zweckmäßigerweise wird die Strömungsbarriere 8' mit einer gegenüber der Horizontalen schräg gestellten Abdeckung 9' versehen, die oberhalb des Füllstandes 11 liegt, wobei die Schrägstellung zum Abfließen von Stoff führt. Fig. 5 zeigt einen Schnitt durch die Strömungsbarriere 8' an der Linie V in Fig. 3.The Fig. 4 shows the top view of the flow barrier 8 'in more detail, in particular, the opening angle β here = 90 ° is entered. Expediently, the flow barrier 8 'is provided with a cover 9' which is inclined relative to the horizontal and which lies above the filling level 11, the inclination leading to the outflow of material. Fig. 5 shows a section through the flow barrier 8 'on the line V in Fig. 3 ,

Um die gewünschten hydraulischen Wirkungen zu erzielten, können auch anders gestaltete Strömuhgsbarrieren verwendet werden, z.B. mit halbrunden oder teilelliptischen Querschnitten, wie es als Beispiel die Fig. 6 zeigt. Gemäß Fig. 8 kann auch eine Neigung der Strömungsbarriere in Umfangsrichtung, vorzugsweise in Drehrichtung des Rotors 2, von Vorteil sein, wobei also der obere Teil der Strömungsbarriere im Umfangsrichtung versetzt gegenüber dem unteren Teil (am Boden des Stofflösers) liegt. Diese Schrägstellung kann die hydraulischen Eigenschaften weiter verbessern.In order to achieve the desired hydraulic effects, differently shaped Strömuhgsbarrieren can be used, for example, with semicircular or partially elliptical cross-sections, as example Fig. 6 shows. According to Fig. 8 can also be an inclination of the flow barrier in the circumferential direction, preferably in the direction of rotation of the rotor 2, be advantageous, so that the upper part of the flow barrier in the circumferential direction offset from the lower part (at the bottom of the pulper) is. This inclination can further improve the hydraulic properties.

Ein erfindungsgemäßer Stofflöser (von der Art, wie in Fig. 3 gezeigt) kann z.B. mit folgenden Maßen versehen sein, Der Behälter 1 dieses Stofflösers hat eine Gesamthöhe H von 2000 mm und eine zylindrische Seitenwand 5, deren Durchmesser D1 = 2700 mm beträgt. Der Rotor 2 hat an seinen bewegten Flügeln einen Außendurchmesser D2 von 1000 mm. Er läuft dicht über einem ebenen kreisringförmigen Sieb 6, dessen Öffnungen er von Verstopfungen frei hält. Der Boden 7 des Stofflösers ist mit einem Bodenwinkel α = 30° schräg gestellt, mit Ausnahme des horizontalen Siebbereiches. An der Seitenwand 5 ist die Strömungsbarriere 8 angebracht, und zwar in Form eines rechtwinkligen WinKelpröfils, das sich vom Boden 7 bis etwa zum oberen Rand des Behälters 1 erstreckt und in den Behälter hineinragt. Dabei beträgt der Radialvorsprung der Strömungsbarriere 8' am Boden 7 ca. 250 mm und steigt gleichmäßig an bis auf den maximalen Radialvorsprung F = 440 mm. Dieser maximale Radialvorsprung F liegt oberhalb des Füllstandes 11, der sich bei bestimmungsgemäßem Betrieb des Stofflösers einstellt. Auch wenn dieses Beispiel sich als günstige Ausführungsform verwiesen hat, sind auch andere Fälle, insbesondere Stofflöser mit größeren Abmessungen, vorstellbar, mit denen sich die Erfindung ebenfalls realisieren lässt.An inventive pulper (of the type, as in Fig. 3 The container 1 of this pulper has an overall height H of 2000 mm and a cylindrical side wall 5 whose diameter D1 = 2700 mm. The rotor 2 has on its moving wings an outer diameter D2 of 1000 mm. He runs close to a flat annular sieve 6, the openings of which he keeps clear of blockages. The bottom 7 of the pulper is inclined at a bottom angle α = 30 °, with the exception of the horizontal screen area. On the side wall 5, the flow barrier 8 is mounted, in the form of a right angle WinKelpröfils which extends from the bottom 7 to about the upper edge of the container 1 and projects into the container. The radial projection of the flow barrier 8 'at the bottom 7 is approximately 250 mm and increases evenly to the maximum radial projection F = 440 mm. This maximum radial projection F is above the level 11, which is established during normal operation of the pulper. Although this example has been referred to as a favorable embodiment, other cases, in particular pulper with larger dimensions, conceivable, with which the invention can also be realized.

Claims (17)

  1. Pulper for pulverizing and suspending paper pulp (S), having an upwardly open container (1) in which the paper pulp (S) may be mixed with water (W), be comminuted, and suspended, such that a paper-pulp containing suspension (P) is formed, wherein the container (1) has a substantially cylindrical side wall (5), a driven rotor (2) for generating a circulation flow in the container (1) being located on the base of the container (1), and a vertical flow barrier (8, 8', 8") being inserted on the side wall (5) of the container (1), characterized in that the front side (4') of the flow barrier (8', 8") in relation to the vertical is disposed at an angle (δ) between 0 and 10°, the angle (δ) being aligned such that at least the major part of the front side (4') from the bottom to the top converges with the axis of the container (1).
  2. Pulper according to Claim 1,
    characterized in that
    only one flow barrier (8, 8', 8") having a maximum radial protrusion (F) which is at least 6%, preferably at least 15% of the diameter (D1) of the container (1) is present.
  3. Pulper according to Claim 2,
    characterized in that
    the one flow barrier (8, 8', 8") is provided with a maximum radial protrusion (F) which is between 10% and 20% of the diameter (D1) of the container (1).
  4. Pulper according to Claim 1, 2, or 3, characterized in that
    the front side (4') of the flow barrier (8', 8") in relation to the vertical is disposed at an angle (δ) between 4 and 8°.
  5. Pulper according to one of the preceding claims, characterized in that
    the angle (δ) is aligned such that at least the major part of the front side from the bottom to the top diverges from the axis of the container (1).
  6. Pulper according to one of the preceding claims, characterized in that
    the height of the flow barrier (8, 8', 8") reaches beyond 80% of the filling level (11) set on the periphery of the container (1) in operation.
  7. Pulper according to Claim 6,
    characterized in that the height of the flow barrier (8, 8', 8") reaches at least up to the filling level (11) on the periphery of the container (1).
  8. Pulper according to one of the preceding claims, characterized in that
    the flow barrier (8') is composed of an angle profile, the legs of which are connected to the side wall (5).
  9. Pulper according to Claim 8,
    characterized in that
    the profile has an opening angle (β) between 80° and 120°, preferably of 90°.
  10. Pulper according to one of Claims 1 to 7, characterized in that
    the flow barrier (8") is composed of a semi-round or oval profile.
  11. Pulper according to one of the preceding claims, characterized in that
    the flow barrier (8, 8', 8") at the top is closed off by an obliquely placed plate.
  12. Pulper according to one of the preceding claims, characterized in that
    the centreline (3) of the rotor (2) is vertical.
  13. Pulper according to one of the preceding claims, characterized in that
    the container (1) has a side wall (5), the centreline (3) of which is upright and is in alignment with that of the rotor (2).
  14. Pulper according to one of the preceding claims, characterized in that
    the diameter (D2) of the rotor (2) is between 20 and 40% of the diameter (D1) of the container (1).
  15. Pulper according to one of the preceding claims, characterized in that
    the ratio between the total height (H) and the diameter (D1) of the container (1) is between 0.8 and 1.2.
  16. Pulper according to one of the preceding claims, characterized in that
    the base (7), proceeding from the region of the rotor (2) to the side wall (5), rises at a base angle (α) which is between 15° and 60°, preferably is 30°.
  17. Pulper according to one of Claims 1 to 15, characterized in that
    the base (7') of the pulper, proceeding from the region of the rotor (2) to the side wall (5), is composed of at least two truncated cones, the lower truncated cone (12) being flatter than the truncated cone (13) lying thereabove.
EP08870961.3A 2008-01-17 2008-12-12 Pulper for pulverizing and suspending paper material Active EP2238291B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200820000684 DE202008000684U1 (en) 2008-01-17 2008-01-17 Pulper for crushing and suspending pulp
PCT/EP2008/010558 WO2009089878A1 (en) 2008-01-17 2008-12-12 Pulper for pulverizing and suspending paper material

Publications (2)

Publication Number Publication Date
EP2238291A1 EP2238291A1 (en) 2010-10-13
EP2238291B1 true EP2238291B1 (en) 2016-07-06

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EP (1) EP2238291B1 (en)
CN (1) CN101910508B (en)
DE (1) DE202008000684U1 (en)
WO (1) WO2009089878A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103981748B (en) * 2014-06-11 2016-08-24 浙江华川实业集团有限公司 A kind of papermaking high-efficiency hydraulic pulper and method of work
AT516085B1 (en) * 2014-07-22 2016-08-15 Pga Putz-Granitzer-Anlagenbau Ges M B H Device for preparing material
CN104372702B (en) * 2014-12-15 2016-08-17 济南大学 A kind of pulper of low-power consumption low noise
CN105369662A (en) * 2015-12-09 2016-03-02 黄蒋元 High-concentration tapered triple-helix hydrapulper

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0122991A3 (en) * 1982-08-12 1985-02-06 The Black Clawson Company Apparatus and method for pulping paper making stock at high consistencies
DE3234702A1 (en) 1982-09-18 1984-03-22 Bbc Brown Boveri & Cie Method for precharging the commutating capacitors in an invertor with interphase commutation
DE3304958C2 (en) * 1983-02-12 1986-10-23 P.J.Wolff & Söhne GmbH Apparate- u. Maschinenbau, 5160 Düren Device for dissolving fibrous materials in liquid
DE3429514A1 (en) 1984-08-10 1986-02-13 J.M. Voith Gmbh, 7920 Heidenheim Pulper
FI72356C (en) 1985-12-31 1987-05-11 Yhtyneet Paperitehtaat Oy Device for destruction of paper and cardboard.
US6508422B2 (en) * 2001-05-11 2003-01-21 Voith Paper, Inc. Pulper for a fiber stock preparation system
FR2844532B1 (en) 2002-09-12 2004-11-05 Kadant Lamort PAPER DESINTEGRATER
DE102005026108A1 (en) 2005-06-07 2006-12-14 Voith Patent Gmbh Pulper for crushing and suspending pulp

Also Published As

Publication number Publication date
WO2009089878A1 (en) 2009-07-23
EP2238291A1 (en) 2010-10-13
CN101910508B (en) 2013-04-17
DE202008000684U1 (en) 2009-05-20
CN101910508A (en) 2010-12-08

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