EP1124003A2 - Screen for purification of fibrous pulp - Google Patents

Screen for purification of fibrous pulp Download PDF

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Publication number
EP1124003A2
EP1124003A2 EP01101939A EP01101939A EP1124003A2 EP 1124003 A2 EP1124003 A2 EP 1124003A2 EP 01101939 A EP01101939 A EP 01101939A EP 01101939 A EP01101939 A EP 01101939A EP 1124003 A2 EP1124003 A2 EP 1124003A2
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EP
European Patent Office
Prior art keywords
rotor
installation
cone
sorter
inlet
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.)
Granted
Application number
EP01101939A
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German (de)
French (fr)
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EP1124003B1 (en
EP1124003A3 (en
Inventor
Helmuth Dipl.-Ing. Dr. Gabl
Axel Dipl.-Ing. Pichler
Alexander Dipl.-Ing. Gscheider
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Andritz AG
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Andritz AG
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Publication date
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Priority to AT01101939T priority Critical patent/ATE295446T1/en
Publication of EP1124003A2 publication Critical patent/EP1124003A2/en
Publication of EP1124003A3 publication Critical patent/EP1124003A3/en
Application granted granted Critical
Publication of EP1124003B1 publication Critical patent/EP1124003B1/en
Anticipated expiration legal-status Critical
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D21D5/023—Stationary screen-drums
    • D21D5/026—Stationary screen-drums with rotating cleaning foils

Definitions

  • the invention relates to a sorter for cleaning a Fibrous suspension.
  • Sorters are machines used for cleaning in the paper industry a stock suspension consisting of water, fibrous materials and Dirt particles exist. In this case, an inflow flow over a Screening device performed, the acceptance stream consisting of water and fibers flowing through the screen. A partial stream, called Reject flow, consisting of water, fibers and contaminants, is in the generally at the end opposite the feed stream deducted.
  • Such a sorter is generally rotationally symmetrical executed and consists of a housing with a tangential arranged inlet, a cylindrical screen basket, usually with holes or vertical slots and a rotating rotor. The task of the rotor is to keep the screen slots free is achieved by blades rotating just on the surface of the screen.
  • the Acceptance flows in a so-called acceptance room, which is often conical is carried out, collected and deducted radially at one point.
  • the Reject flow is generally on the opposite side of the inlet Side of the screen basket in a mostly ring-shaped reject space and subtracted from this tangentially.
  • Such a sorter is e.g. from the US 4,268,381 known.
  • the disadvantage of these sorting machines is in the fact that a relatively large reject space creates the danger of clogging occurs at low flow rates.
  • the aim of the invention is therefore to improve the To create flow conditions in the sorter to create a Reduction of the energy used with increased production and To achieve dirt separation.
  • the invention is therefore characterized in that in the inlet area A stationary installation between the pipe socket and the end of the rotor is provided, which can be rotationally symmetrical. Thereby becomes a significant improvement in flow conditions and in a further consequence is a reduction in the energy used.
  • An advantageous development of the invention is characterized in that that the installation of a cone, a truncated cone, hemisphere, spherical segment, Spherical layer, paraboloid or double-shell hyperboloid.
  • a favorable embodiment of the invention is characterized in that that when installed as a cone or truncated cone, the cone angle ⁇ is between 10 ° and 60 °.
  • a favorable further development of the invention is characterized in that that the axis of the inlet nozzle is arranged parallel to the cone jacket is. This allows the flow to be guided better and the Energy losses can be reduced further.
  • a favorable alternative embodiment of the invention is thereby characterized in that the installation is a spiral body, the Slope of the spiral can be chosen such that the Flow velocity in the inlet area over the entire Sorting basket width is constant.
  • An advantageous development of the invention is characterized in that that the installation is arranged centrally.
  • An advantageous embodiment of the invention is characterized in that that the acceptance room is double conical.
  • An advantageous development of the invention is characterized in that that the sorter is designed as a double machine.
  • a favorable further development of the invention is characterized in that that the inlet takes place axially through the rotor.
  • a favorable embodiment of the invention is characterized in that that the drive-side rotor part in height equal to or greater than that flowed in and flowed through, the drive side facing away rotor part.
  • a favorable embodiment of the invention is characterized in that that the inlet is in the middle from the side.
  • An advantageous development of the invention is characterized in that that the acceptance outlet is provided twice.
  • An advantageous embodiment of the invention is characterized in that that the sorter is arranged horizontally.
  • a favorable further development of the invention is characterized in that that for presorting a screen basket rotating with the rotor in Inflow area is provided, with rotating also in the pre-sorting area Wings can be provided.
  • a favorable further development of the invention is characterized in that that several blades are distributed over the height and / or circumference of the rotor are provided.
  • FIG. 2 an alternative embodiment of the invention
  • Fig. 3 shows an embodiment of a Double machine
  • Fig. 4 shows a further variant of the invention
  • Fig. 5 a 3-D representation of a variant of the invention
  • Fig. 6 shows the area for a integrated presorting
  • Fig. 7 is a diagram of the dependence of specific energy for sieve flow
  • Fig. 8 is a diagram of the Dirt point reduction for sieve flow represents.
  • Fig. 1 shows a sorter 1, the one through an inlet port 2 Fibrous suspension is fed for cleaning.
  • Inlet 3 In the area of Inlet 3 is provided, which is shown here as a truncated cone is.
  • the "tip" of the truncated cone points in the direction of the rotor 4.
  • the Installation 3 can be designed both as a hollow body and as a solid body his.
  • the flank angle is ⁇ des Truncated cone between 10 ° and 60 °.
  • the fiber suspension enters the Space between rotor 4 and sieve 5 and is through the sieve promoted to acceptance room 6.
  • the housing of the acceptance room is double-conical, i.e. the housing tapers approximately from the The upper edge of the acceptance outlet 7 is conical towards the reject space, whereby the angle of the acceptance room for a constant flow rate assuming a uniform flow through the sieve is laid out.
  • the rotor 4 of the sorter 1 is for a uniform flow against the sieve, which causes a low thickening behavior above the screen height, designed. It has the shape of a parabola, so that the axial Flow velocity within the strainer basket when assumed uniform outflow through the sieve remains constant. Alternatively the shape of the rotor can also be approximated using a cone shape.
  • the reject space designed such that flow velocities greater than 2.5 m / sec with or without additional input of stirring energy by the rotor available. This practically prevents constipation.
  • Fig. 2 shows an analog arrangement of a sorter 1, here the Inlet nozzle 2 is arranged so that the suspension parallel to Shell of the truncated cone 3 is supplied. This allows the Energy loss that is otherwise present when the flow is diverted, be avoided.
  • Fig. 3 shows the execution of a top machine, as for high Production performance is carried out.
  • the rotor is e.g. as Double parabolic rotor 4, 4 'or double cone rotor.
  • the Reject deduction 8, 8 'and the screen basket 5, 5' is in duplicate intended.
  • the acceptance room 6, 6 ' is double-conical, i.e. again that the housing is approx. from the upper edge of the Acceptance outlets 7, 7 'tapered towards the reject space.
  • the stock suspension is here again supplied via the supply nozzle 2 and in the embodiment shown axially guided by the rotor.
  • the drive-side rotor part 4 in height L1 equal to or greater than the inflow and through flow, the drive side facing rotor part 4 'with the height L2.
  • the suspension occurs in the middle Area through openings 9 from the flowed through rotor part 4 'and is distributed here in both directions. It occurs like a simple one Sorter through the sieve basket 5, 5 'into the acceptance room 6, 6', the is also double conical here.
  • the reject flows both up and down and is here in a reject space 8, 8 ' removed from the machine.
  • the Inlet also take place centrally from one side.
  • the accept outlet can either twice, i.e. above (7 ') or below (7) or simply in the middle to be appropriate.
  • the sorting machine can also be in a lying position be carried out.
  • Fig. 4 shows a variant of the invention, a vertical installation standing, around 270 ° rotating sheet 3 'is provided.
  • This Sheet 3 ' uses its spiral shape to direct the flow of material from the inlet 2 coming evenly into the strainer basket 5.
  • this type of installation 3 ' shown in supervision. It can be seen that the sheet 3 'at Point 16 begins and then spirals around the center (the axis) runs up to point 17.
  • the space 15 (shown hatched) between Sheet 3 'and the outer wall of the sorter can remain free.
  • Essential is that the flow cross-section decreases continuously and thus a largely uniform flow rate is given is adapted to the inflow of the suspension into the screen basket 5 is.
  • FIG. 5 shows the 3-D representation of a further variant of the invention.
  • the Installation 3 is attached to the lid, the surface spiraling in Direction of the strainer runs.
  • the fiber suspension is from Inlet 2 forth on the surface facing the screen basket directly into the Screen basket steered, here also the outflow is taken into account that the flow rate is practically constant. Thereby energy losses can be minimized.
  • FIG. 6 now shows the upper part of a sorter 1 with an integrated one Pre-sorting.
  • the sorter 1 via the inlet nozzle 2 Fibrous suspension fed.
  • a Heavy part separation is in the upper area of the A sorting area 10 is provided in the sorter 1, into which the suspension passes through a sieve 11. This allows specifically heavy parts and large-scale impurities that come from dirty or high soiled fibers result, be removed well.
  • a rotor 12 runs along with the rotor 4 via a Extension 13 is connected. The heavy parts leave the pre-sorting area through a nozzle 14.
  • the rotor 12 can in the pre-sorting area 10 both in the feed stream (as shown) or in the acceptance stream, then another fine sorting in the lower area of the Sorter 1 is fed, run. If the rotor 12 is running in the feed stream, see above are the strong by the rotating cleaning blades of the rotor 12 abrasive heavy parts are held on the surface of the Open sieve 11 and damage it.
  • the specifically heavy parts are centrifuged outwards.
  • a longer service life of the screen baskets in the Pre-sorting area achieved, on the other hand, by means of the targeted barrier Pre-sorting basket sustainable storage of heavy parts in the centrifugal re-sorting area reached.
  • the separate discharge of rough and Smaller impurities lead to increased performance (throughput and increased effectiveness) compared to conventional sorting machines.
  • this variant can also be used with a Double cone rotor can be executed.
  • Fig. 7 shows the diagram of the energy requirement over the Sieve flow, here a curve for previous sorters and a Curve for the sorter according to the invention with a tapered installation is shown in the inlet area.
  • Fig. 8 is the dirt spot reduction over the sieve flow shown. It can be seen here that through a conical installation in Inlet space also the dirt point reduction can be increased significantly could, while lowering the specific energy requirement.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

Abstract

A screen for cleaning a pulp suspension includes a stationary installation in the infeed area between the infeed branch and the free end of the rotor.</PTEXT>

Description

Die Erfindung betrifft einen Sortierer zur Reinigung einer Faserstoffsuspension.The invention relates to a sorter for cleaning a Fibrous suspension.

Sortierer sind in der Papierindustrie eingesetzte Maschinen zur Reinigung einer Stoffsuspension, die aus Wasser, Faserstoffen und Schmutzpartikeln besteht. Dabei wird ein Zulaufstrom über eine Siebvorrichtung geführt, wobei der Akzeptstrom, bestehend aus Wasser und Fasern, durch das Sieb hindurchströmt. Ein Teilstrom, genannt Rejektstrom, bestehend aus Wasser, Fasern und Schmutzstoffen, wird im allgemeinen an dem dem Zulaufstrom gegenüberliegenden Ende abgezogen. Im allgemeinen ist ein derartiger Sortierer rotationssymetrisch ausgeführt und besteht aus einem Gehäuse mit einem tangential angeordneten Zulauf, einem zylindrischen Siebkorb, meist mit Löchern oder senkrechten Schlitzen versehen und einem sich drehenden Rotor. Die Aufgabe des Rotors besteht in der Freihaltung der Siebschlitze, was durch knapp an der Sieboberfläche rotierende Flügel erreicht wird. Der Akzeptstrom wird in einem sogenannten Akzeptraum, der oft konisch ausgeführt ist, gesammelt und an einer Stelle radial abgezogen. Der Rejekt-Strom wird im allgemeinen an der dem Zulauf gegenüberliegenden Seite des Siebkorbes in einen meist ringförmigen Rejektraum geführt und aus diesem tangential abgezogen. Ein derartiger Sortierer ist z.B. aus der US 4,268,381 bekannt. Der Nachteil dieser Sortiermaschinen besteht darin, daß durch einen relativ groß ausgeführten Rejektraum die Gefahr des Verstopfens bei geringen Strömungsgeschwindigkeiten auftritt. Weiters tritt eine ungleichmäßige Anströmung des Siebkorbes sowie ungleichmäßige Strömungsbedingungen im Akzeptraum, speziell im Bereich des Gutstoffaustritts, auf. Sorters are machines used for cleaning in the paper industry a stock suspension consisting of water, fibrous materials and Dirt particles exist. In this case, an inflow flow over a Screening device performed, the acceptance stream consisting of water and fibers flowing through the screen. A partial stream, called Reject flow, consisting of water, fibers and contaminants, is in the generally at the end opposite the feed stream deducted. Such a sorter is generally rotationally symmetrical executed and consists of a housing with a tangential arranged inlet, a cylindrical screen basket, usually with holes or vertical slots and a rotating rotor. The task of the rotor is to keep the screen slots free is achieved by blades rotating just on the surface of the screen. The Acceptance flows in a so-called acceptance room, which is often conical is carried out, collected and deducted radially at one point. The Reject flow is generally on the opposite side of the inlet Side of the screen basket in a mostly ring-shaped reject space and subtracted from this tangentially. Such a sorter is e.g. from the US 4,268,381 known. The disadvantage of these sorting machines is in the fact that a relatively large reject space creates the danger of clogging occurs at low flow rates. There is also an uneven flow to the screen basket as well uneven flow conditions in the acceptance room, especially in the Area of the exit of the material, on.

Ziel der Erfindung ist es daher, eine Verbesserung der Strömungsverhältnisse im Sortierer zu schaffen, um damit eine Verringerung der eingesetzten Energie bei gesteigerter Produktion und Schmutzabscheidung zu erreichen.The aim of the invention is therefore to improve the To create flow conditions in the sorter to create a Reduction of the energy used with increased production and To achieve dirt separation.

Die Erfindung ist daher dadurch gekennzeichnet, daß im Zulaufbereich zwischen Rohrstutzen und dem Ende des Rotors ein stationärer Einbau vorgesehen ist, der rotationssymetrisch ausgeführt sein kann. Dadurch wird eine wesentliche Verbesserung der Strömungsverhältnisse und in weiterer Folge eine Verringerung der eingesetzten Energie erreicht.The invention is therefore characterized in that in the inlet area A stationary installation between the pipe socket and the end of the rotor is provided, which can be rotationally symmetrical. Thereby becomes a significant improvement in flow conditions and in a further consequence is a reduction in the energy used.

Eine vorteilhafte Weiterbildung der Erfindung ist dadurch gekennzeichnet, daß der Einbau ein Kegel, ein Kegelstumpf, Halbkugel, Kugelsegment, Kugelschicht, Paraboloid oder zweischaliges Hyperboloid ist.An advantageous development of the invention is characterized in that that the installation of a cone, a truncated cone, hemisphere, spherical segment, Spherical layer, paraboloid or double-shell hyperboloid.

Eine günstige Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß bei einem Einbau als Kegel oder Kegelstumpf der Kegelwinkel α zwischen 10° und 60° beträgt.A favorable embodiment of the invention is characterized in that that when installed as a cone or truncated cone, the cone angle α is between 10 ° and 60 °.

Eine günstige Weiterbildung der Erfindung ist dadurch gekennzeichnet, daß die Achse des Zulaufstutzens parallel zum Kegelmantel angeordnet ist. Dadurch kann die Strömung besser geführt werden und die Energieverluste weiter verringert werden.A favorable further development of the invention is characterized in that that the axis of the inlet nozzle is arranged parallel to the cone jacket is. This allows the flow to be guided better and the Energy losses can be reduced further.

Eine günstige alternative Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß der Einbau ein spiralförmiger Körper ist, wobei die Steigung der Spirale derart gewählt werden kann, daß die Strömungsgeschwindigkeit im Zulaufbereich über der gesamten Sortierkorbbreite konstant ist. A favorable alternative embodiment of the invention is thereby characterized in that the installation is a spiral body, the Slope of the spiral can be chosen such that the Flow velocity in the inlet area over the entire Sorting basket width is constant.

Eine vorteilhafte Weiterbildung der Erfindung ist dadurch gekennzeichnet, daß der Einbau zentrisch angeordnet ist.An advantageous development of the invention is characterized in that that the installation is arranged centrally.

Eine vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß der Akzeptraum doppelt konisch ausgestaltet ist.An advantageous embodiment of the invention is characterized in that that the acceptance room is double conical.

Eine vorteilhafte Weiterbildung der Erfindung ist dadurch gekennzeichnet, daß der Sortierer als Doppelmaschine ausgebildet ist.An advantageous development of the invention is characterized in that that the sorter is designed as a double machine.

Eine günstige Weiterbildung der Erfindung ist dadurch gekennzeichnet, daß der Zulauf axial durch den Rotor erfolgt.A favorable further development of the invention is characterized in that that the inlet takes place axially through the rotor.

Eine günstige Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß der antriebsseitige Rotorteil in seiner Höhe gleich oder größer als der an- und durchgeströmte, der Antriebsseite abgewandte Rotorteil ist.A favorable embodiment of the invention is characterized in that that the drive-side rotor part in height equal to or greater than that flowed in and flowed through, the drive side facing away rotor part.

Eine günstige Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß der Zulauf mittig von der Seite erfolgt.A favorable embodiment of the invention is characterized in that that the inlet is in the middle from the side.

Eine vorteilhafte Weiterbildung der Erfindung ist dadurch gekennzeichnet, daß der Akzeptauslaß zweifach vorgesehen ist.An advantageous development of the invention is characterized in that that the acceptance outlet is provided twice.

Eine vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß der Sortierer liegend angeordnet ist.An advantageous embodiment of the invention is characterized in that that the sorter is arranged horizontally.

Eine günstige Weiterbildung der Erfindung ist dadurch gekennzeichnet, daß zur Vorsortierung ein mit dem Rotor mitdrehender Siebkorb im Zulaufbereich vorgesehen ist, wobei auch im Vorsortierbereich rotierende Flügel vorgesehen sein können. A favorable further development of the invention is characterized in that that for presorting a screen basket rotating with the rotor in Inflow area is provided, with rotating also in the pre-sorting area Wings can be provided.

Eine günstige Weiterbildung der Erfindung ist dadurch gekennzeichnet, daß am Rotor mehrere Flügel über Höhe und/oder Umfang verteilt vorgesehen sind.A favorable further development of the invention is characterized in that that several blades are distributed over the height and / or circumference of the rotor are provided.

Die Erfindung wird nun im folgenden an Hand der Zeichnungen beispielhaft beschrieben, wo bei Fig. 1 eine Ausgestaltung der Erfindung, Fig. 2 eine alternative Ausgestaltung der Erfindung, Fig. 3 eine Ausführung einer Doppelmaschine, Fig. 4 eine weitere Variante der Erfindung, Fig. 5 eine 3-D-Darstellung einer Variante der Erfindung, Fig. 6 den Bereich für eine integrierte Vorsortierung, Fig. 7 ein Diagramm der Abhängigkeit der spezifischen Energie zur Siebdurchströmung und Fig. 8 ein Diagramm der Schmutzpunktreduktion zur Siebdurchströmung darstellt.The invention will now be described by way of example with reference to the drawings 1 where an embodiment of the invention is shown in FIG. 2 an alternative embodiment of the invention, Fig. 3 shows an embodiment of a Double machine, Fig. 4 shows a further variant of the invention, Fig. 5 a 3-D representation of a variant of the invention, Fig. 6 shows the area for a integrated presorting, Fig. 7 is a diagram of the dependence of specific energy for sieve flow and Fig. 8 is a diagram of the Dirt point reduction for sieve flow represents.

Fig. 1 zeigt einen Sortierer 1, dem durch einen Zulaufstutzen 2 eine Faserstoffsuspension zur Reinigung zugeführt wird. Im Bereich des Zulaufes ist ein Einbau 3 vorgesehen, der hier als Kegelstumpf dargestellt ist. Die "Spitze" des Kegelstumpfes weist in Richtung des Rotors 4. Der Einbau 3 kann sowohl als Hohlkörper, als auch als Vollkörper ausgebildet sein. Zur optimalen Umlenkung beträgt der Flankenwinkel α des Kegelstumpfes zwischen 10° und 60°. Die Faserstoffsuspension tritt in den Raum zwischen Rotor 4 und Sieb 5 ein und wird durch das Sieb hindurch in den Akzeptraum 6 gefördert. Das Gehäuse des Akzeptraumes ist doppel-konisch ausgeführt, d.h. das Gehäuse verjüngt sich etwa ab der Ober-kante des Akzeptauslasses 7 konisch zum Rejektraum hin, wobei der Winkel des Akzeptraumes für eine gleichbleibende Strömungsgeschwindigkeit bei angenommener gleichförmiger Ausströmung durch das Sieb ausgelegt ist.Fig. 1 shows a sorter 1, the one through an inlet port 2 Fibrous suspension is fed for cleaning. In the area of Inlet 3 is provided, which is shown here as a truncated cone is. The "tip" of the truncated cone points in the direction of the rotor 4. The Installation 3 can be designed both as a hollow body and as a solid body his. For optimal deflection, the flank angle is α des Truncated cone between 10 ° and 60 °. The fiber suspension enters the Space between rotor 4 and sieve 5 and is through the sieve promoted to acceptance room 6. The housing of the acceptance room is double-conical, i.e. the housing tapers approximately from the The upper edge of the acceptance outlet 7 is conical towards the reject space, whereby the angle of the acceptance room for a constant flow rate assuming a uniform flow through the sieve is laid out.

Der Rotor 4 des Sortierers 1 ist dabei für eine gleichmäßige Siebanströmung, die ein geringes Eindickverhalten über der Siebhöhe bedingt, ausgelegt. Er weist die Form einer Parabel auf, so daß die achsiale Strömungsgeschwindigkeit innerhalb des Siebkorbes bei angenommener gleichförmiger Ausströmung durch das Sieb konstant bleibt. Alternativ kann die Form des Rotors auch über eine Konusform angenähert werden.The rotor 4 of the sorter 1 is for a uniform flow against the sieve, which causes a low thickening behavior above the screen height, designed. It has the shape of a parabola, so that the axial Flow velocity within the strainer basket when assumed uniform outflow through the sieve remains constant. Alternatively the shape of the rotor can also be approximated using a cone shape.

Um das Rejekt entsprechend abführen zu können, wird der Rejektraum derart ausgestaltet, daß Strömungsgeschwindigkeiten größer 2,5 m / sek mit oder ohne zusätzlicher Einbringung von Rührenergie durch den Rotor vorliegen. Dadurch wird eine Verstopfung praktisch vermieden.In order to be able to discharge the reject accordingly, the reject space designed such that flow velocities greater than 2.5 m / sec with or without additional input of stirring energy by the rotor available. This practically prevents constipation.

Fig. 2 zeigt eine analoge Anordnung eines Sortierers 1, wobei hier der Zulaufstutzen 2 so angeordnet ist, daß die Suspension parallel zum Mantel des Kegelstumpfes 3 zugeführt wird. Dadurch kann der Energieverlust, der sonst bei Strömungsumlenkung vorhanden ist, vermieden werden.Fig. 2 shows an analog arrangement of a sorter 1, here the Inlet nozzle 2 is arranged so that the suspension parallel to Shell of the truncated cone 3 is supplied. This allows the Energy loss that is otherwise present when the flow is diverted, be avoided.

Fig. 3 zeigt die Ausführung einer Topmaschine, wie sie für hohe Produktionsleistungen ausgeführt wird. Dabei wird der Rotor z.B. als Doppelparabel-Rotor 4, 4' oder Doppelkegelrotor ausgeführt. Auch der Rejektabzug 8, 8' und der Siebkorb 5, 5' ist in zweifacher Ausfertigung vorgesehen. Auch hier ist der Akzeptraum 6, 6' doppelkonisch ausgeführt, d.h. wiederum, daß sich das Gehäuse ca von der Oberkante des Akzeptauslasses 7, 7' zum Rejektraum hin konisch verjüngt. Die Stoffsuspension wird hier wiederum über den Zufuhrstutzen 2 zugeführt und in der dargestellten Ausführungsform axial durch den Rotor geführt. Bei dieser Art der Anströmung ist der antriebsseitige Rotorteil 4 in der Höhe L1 gleich oder größer als der an- und durchgeströmte, der Antriebsseite abgewandte Rotorteil 4' mit der Höhe L2. Die Suspension tritt im mittleren Bereich durch Öffnungen 9 aus dem durchströmten Rotorteil 4' aus und wird hier in beide Richtungen verteilt. Sie tritt wie bei einem einfachen Sortierer durch den Siebkorb 5, 5' hindurch in den Akzeptraum 6, 6', der hier ebenfalls doppelkonisch ausgeführt ist. Das Rejekt strömt sowohl nach oben als auch nach unten und wird hier in einem Rejektraum 8, 8' aus der Maschine abgeführt. Bei einer anderen Ausführungsform kann der Zulauf auch mittig von einer Seite her erfolgen. Der Akzeptauslaß kann entweder zweifach, d.h. oben (7') bzw. unten (7) oder auch einfach mittig angebracht sein. Die Sortiermaschine kann dabei auch in liegender Form ausgeführt werden.Fig. 3 shows the execution of a top machine, as for high Production performance is carried out. The rotor is e.g. as Double parabolic rotor 4, 4 'or double cone rotor. Also the Reject deduction 8, 8 'and the screen basket 5, 5' is in duplicate intended. Here too, the acceptance room 6, 6 'is double-conical, i.e. again that the housing is approx. from the upper edge of the Acceptance outlets 7, 7 'tapered towards the reject space. The stock suspension is here again supplied via the supply nozzle 2 and in the embodiment shown axially guided by the rotor. At this type of inflow is the drive-side rotor part 4 in height L1 equal to or greater than the inflow and through flow, the drive side facing rotor part 4 'with the height L2. The suspension occurs in the middle Area through openings 9 from the flowed through rotor part 4 'and is distributed here in both directions. It occurs like a simple one Sorter through the sieve basket 5, 5 'into the acceptance room 6, 6', the is also double conical here. The reject flows both up and down and is here in a reject space 8, 8 ' removed from the machine. In another embodiment, the Inlet also take place centrally from one side. The accept outlet can either twice, i.e. above (7 ') or below (7) or simply in the middle to be appropriate. The sorting machine can also be in a lying position be carried out.

Fig. 4 zeigt eine Variante der Erfindung, wobei als Einbau ein senkrecht stehendes, um ca. 270° umlaufendes Blech 3' vorgesehen ist. Dieses Blech 3' lenkt mittels seiner Spiralform den Stofffluss vom Einlauf 2 kommend gleichmäßig in den Siebkorb 5. In Fig. 4 ist diese Art des Einbaus 3' in Aufsicht dargestellt. Es ist erkennbar, dass das Blech 3' bei Punkt 16 beginnt und dann spiralförmig um den Mittelpunkt (die Achse) bis zu Punkt 17 verläuft. Der Raum 15 (schraffiert dargestellt) zwischen Blech 3' und Außenwand des Sortierers kann dabei frei bleiben. Wesentlich ist, dass sich der Strömungsquerschnitt kontinuierlich verringert und somit eine weitestgehend gleichmäßige Strömungsgeschwindigkeit gegeben ist, die an den Zufluss der Suspension in den Siebkorb 5 angepasst ist.Fig. 4 shows a variant of the invention, a vertical installation standing, around 270 ° rotating sheet 3 'is provided. This Sheet 3 'uses its spiral shape to direct the flow of material from the inlet 2 coming evenly into the strainer basket 5. In Fig. 4 this type of installation 3 'shown in supervision. It can be seen that the sheet 3 'at Point 16 begins and then spirals around the center (the axis) runs up to point 17. The space 15 (shown hatched) between Sheet 3 'and the outer wall of the sorter can remain free. Essential is that the flow cross-section decreases continuously and thus a largely uniform flow rate is given is adapted to the inflow of the suspension into the screen basket 5 is.

Fig. 5 zeigt die 3-D-Darstellung einer weiteren Variante der Erfindung. Der Einbau 3" ist am Deckel angebracht, wobei die Oberfläche spiralförmig in Richtung des Siebkorbes verläuft. Die Faserstoffsuspension wird vom Einlauf 2 her an der dem Siebkorb zugewandten Fläche direkt in den Siebkorb gelenkt, wobei auch hier der Abfluss derart berücksichtigt ist, dass die Strömungsgeschwindigkeit praktisch konstant ist. Dadurch können Energieverluste minimiert werden.5 shows the 3-D representation of a further variant of the invention. The Installation 3 "is attached to the lid, the surface spiraling in Direction of the strainer runs. The fiber suspension is from Inlet 2 forth on the surface facing the screen basket directly into the Screen basket steered, here also the outflow is taken into account that the flow rate is practically constant. Thereby energy losses can be minimized.

Fig. 6 zeigt nun den oberen Teil eines Sortierers 1 mit einer integrierten Vorsortierung. Hierbei wird dem Sortierer 1 über den Zulaufstutzen 2 die Faserstoffsuspension zugeführt. Um im Bereich der Vorsortierung eine Schwerteilabscheidung durchzuführen, ist im oberen Bereich des Sortierers 1 ein Vorsortierbereich 10 vorgesehen, in den die Suspension durch ein Sieb 11 hindurchtritt. Damit können spezifisch schwere Teile und großflächige Verunreingigungen, die aus verschmutzten bzw. hoch verschmutzten Faserstoffen resultieren, gut entfernt werden. Außerhalb des Siebes 11 läuft ein Rotor 12 mit, der mit dem Rotor 4 über einen Fortsatz 13 verbunden ist. Die Schwerteile verlassen den Vorsortierbereich durch einen Stutzen 14. Der Rotor 12 kann im Vorsortierbereich 10 sowohl im Zulaufstrom (wie dargestellt) oder auch im Akzeptstrom, der dann einer weiteren Feinsortierung im unteren Bereich des Sortierers 1 zugeführt wird, laufen. Läuft der Rotor 12 im Zulaufstrom, so werden durch die rotierenden Reinigungsflügel des Rotors 12 die stark abrasiv wirkenden Schwerteile abgehalten auf der Oberfläche des Siebes 11 aufzuschlagen und diese zu beschädigen.6 now shows the upper part of a sorter 1 with an integrated one Pre-sorting. Here, the sorter 1 via the inlet nozzle 2 Fibrous suspension fed. In order to pre-sort a Heavy part separation is in the upper area of the A sorting area 10 is provided in the sorter 1, into which the suspension passes through a sieve 11. This allows specifically heavy parts and large-scale impurities that come from dirty or high soiled fibers result, be removed well. Outside of the sieve 11, a rotor 12 runs along with the rotor 4 via a Extension 13 is connected. The heavy parts leave the pre-sorting area through a nozzle 14. The rotor 12 can in the pre-sorting area 10 both in the feed stream (as shown) or in the acceptance stream, then another fine sorting in the lower area of the Sorter 1 is fed, run. If the rotor 12 is running in the feed stream, see above are the strong by the rotating cleaning blades of the rotor 12 abrasive heavy parts are held on the surface of the Open sieve 11 and damage it.

Hiebei werden die spezifisch schweren Teile nach außen zentrifugiert. Damit wird einerseits eine längere Standzeit der Siebkörbe im Vorsortierbereich erzielt, anderseits wird durch die gezielte Barriere mittels Vorsortierkorb eine nachhaltige Abhaltung von Schwerteilen im zentrifugalen Nachsortierbereich erreicht. Dies bewirkt, daß die Rotoren, da sie im Gutstoff der ersten Stufe rotieren, länger an den Anlaufkanten belastet werden, eine geringere Abrasion und Energieaufnahme aufweisen und damit näher zur Sieboberfläche des Siebes 5 angestellt werden können, ohne daß Beschädigungen des Rotors oder der Sieboberfläche ausgelöst werden. Die getrennte Abführung von groben und kleineren Verunreinigungen führt zur Leistungssteigerungen (Durchsatz und Effektivitätssteigerung) gegenüber herkömmlichen Sortiermaschinen. Für hohe Produktionsleistungen kann auch diese Variante mit einem Doppelkegelrotor ausgeführt werden. The specifically heavy parts are centrifuged outwards. On the one hand, a longer service life of the screen baskets in the Pre-sorting area achieved, on the other hand, by means of the targeted barrier Pre-sorting basket sustainable storage of heavy parts in the centrifugal re-sorting area reached. This causes the rotors, since they rotate in the first stage accept, longer at the leading edges be loaded, have less abrasion and energy consumption and thus closer to the screen surface of the screen 5 can be without damaging the rotor or the screen surface to be triggered. The separate discharge of rough and Smaller impurities lead to increased performance (throughput and increased effectiveness) compared to conventional sorting machines. For high production outputs, this variant can also be used with a Double cone rotor can be executed.

Fig. 7 zeigt das Diagramm des Energiebedarfs über die Siebdurchströmung, wobei hier eine Kurve für bisherige Sortierer und eine Kurve für den Sortierer gemäß der Erfindung mit einem kegeligen Einbau im Zulaufraum dargestellt ist.Fig. 7 shows the diagram of the energy requirement over the Sieve flow, here a curve for previous sorters and a Curve for the sorter according to the invention with a tapered installation is shown in the inlet area.

In Fig. 8 ist die Schmutzpunktreduktion über der Siebdurchströmung dargestellt. Hier ist erkennbar, daß durch einen kegeligen Einbau im Zulaufraum auch die Schmutzpunktreduktion wesentlich erhöht werden konnte, bei gleichzeitiger Senkung des spezifischen Energiebedarfs.In Fig. 8 is the dirt spot reduction over the sieve flow shown. It can be seen here that through a conical installation in Inlet space also the dirt point reduction can be increased significantly could, while lowering the specific energy requirement.

Claims (18)

Sortierer zur Reinigung einer Faserstoffsuspension, dadurch gekennzeichnet, daß im Zulaufbereich zwischen Rohrstutzen (2) und dem freien Ende des Rotors (4) ein stationärer Einbau (3, 3', 3") vorgesehen ist.Sorter for cleaning a fiber suspension, thereby characterized in that in the inlet area between pipe socket (2) and the free end of the rotor (4) is a stationary one Installation (3, 3 ', 3 ") is provided. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Einbau (3) rotationssymetrisch ist.Apparatus according to claim 1, characterized in that the Installation (3) is rotationally symmetrical. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Einbau (3) ein Kegel, Kegelstumpf, Halbkugel, Kugelsegment, Kugelschicht, Paraboloid oder zweischaliges Hyperboloid ist.Apparatus according to claim 2, characterized in that the Installation (3) a cone, truncated cone, hemisphere, spherical segment, Spherical layer, paraboloid or double-shell hyperboloid. Vorrichtung nach Anspruch 2, mit einem Einbau als Kegel oder Kegelstumpf, dadurch gekennzeichnet, daß der Kegelwinkel α zwischen 10° und 60° beträgt.Apparatus according to claim 2, with an installation as a cone or Truncated cone, characterized in that the cone angle α is between 10 ° and 60 °. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Achse des Zulaufstutzens (2) parallel zum Kegelmantel angeordnet ist.Apparatus according to claim 4, characterized in that the The axis of the inlet connection (2) is arranged parallel to the cone jacket is. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Einbau (3', 3") ein spiralförmiger Körper ist.Apparatus according to claim 1, characterized in that the Installation (3 ', 3 ") is a spiral body. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Steigung der Spirale derart gewählt wird, daß die Strömungsgeschwindigkeit im Zulaufbereich über der gesamten Sortierkorbbreite konstant ist. Apparatus according to claim 6, characterized in that the Slope of the spiral is chosen such that the flow rate in the inlet area over the entire width of the sorting basket is constant. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Einbau (3, 3', 3") zentrisch angeordnet ist.Device according to one of claims 1 to 7, characterized characterized in that the installation (3, 3 ', 3 ") is arranged centrally. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Akzeptraum (6, 6') doppelt konisch ausgestaltet ist.Device according to one of claims 1 to 7, characterized characterized in that the acceptance space (6, 6 ') is double conical is designed. Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der Sortierer (1) als Doppelmaschine ausgebildet ist.Device according to one of claims 1 to 9, characterized characterized in that the sorter (1) as a double machine is trained. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, daß der Zulauf axial durch den Rotor (4) erfolgt.Apparatus according to claim 10, characterized in that the Axial feed through the rotor (4). Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, daß der antriebsseitige Rotorteil (4) in seiner Höhe gleich oder größer als der an- und durchströmte, der Antriebsseite abgewandte Rotorteil (4') ist.Apparatus according to claim 11, characterized in that the drive-side rotor part (4) in height equal to or greater than the rotor part flowing in and through, facing away from the drive side (4 ') is. Vorrichtung nach Anspruch 12, dadurch gekennezeichnet, daß der Zulauf mittig von der Seite erfolgt.Apparatus according to claim 12, characterized in that the Central inlet from the side. Vorrichtung nach einem der Ansprüche 10 bis 13, dadurch gekennzeichnet, daß der Akzeptauslaß (7, 7') zweifach vorgesehen ist.Device according to one of claims 10 to 13, characterized characterized in that the acceptance outlet (7, 7 ') is provided twice is. Vorrichtung nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, daß der Sortierer (1) liegend angeordnet ist. Device according to one of claims 1 to 14, characterized characterized in that the sorter (1) is arranged horizontally. Vorrichtung nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, daß zur Vorsortierung ein mit dem Rotor (12) mitdrehender Siebkorb (11) im Zulaufbereich vorgesehen ist.Device according to one of claims 1 to 15, characterized characterized in that a pre-sorting with the rotor (12) rotating screen basket (11) is provided in the inlet area. Vorrichtung nach Anspruch 16, dadurch gekennzeichnet, daß im Vorsortierbereich (10) rotorierende Flügel vorgesehen sind.Apparatus according to claim 16, characterized in that in Pre-sorting area (10) rotating blades are provided. Vorrichtung nach einem der Ansprüche 1 bis 17, dadurch gekennzeichnet, daß am Rotor (4, 4') mehrere Flügel über Höhe und/oder Umfang verteilt vorgesehen sind.Device according to one of claims 1 to 17, characterized characterized in that on the rotor (4, 4 ') several wings over height and / or extent are provided distributed.
EP01101939A 2000-02-03 2001-01-29 Screen for purification of fibrous pulp Expired - Lifetime EP1124003B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT01101939T ATE295446T1 (en) 2000-02-03 2001-01-29 SCREENER FOR CLEANING A FIBER SUSPENSION

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AT1702000 2000-02-03
AT0017000A AT408772B (en) 2000-02-03 2000-02-03 SORTER FOR CLEANING A FIBER SUSPENSION

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EP1124003A2 true EP1124003A2 (en) 2001-08-16
EP1124003A3 EP1124003A3 (en) 2001-11-21
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EP (1) EP1124003B1 (en)
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AT (2) AT408772B (en)
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CA (1) CA2333800A1 (en)
DE (1) DE50106153D1 (en)
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MX (1) MXPA01001294A (en)

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DE10233364C1 (en) * 2002-07-23 2003-12-24 Voith Paper Patent Gmbh Pressure sorter for sieving a fiber suspension
EP1462567A1 (en) 2003-03-27 2004-09-29 Andritz AG Screen for purification of fibrous pulp
WO2013010755A1 (en) * 2011-07-15 2013-01-24 Voith Patent Gmbh Pressure screen

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Publication number Priority date Publication date Assignee Title
CA2444486C (en) * 2001-04-16 2013-04-02 J & L Fiber Services, Inc. Screen cylinder and method
JP2005171449A (en) * 2003-12-15 2005-06-30 Aikawa Iron Works Co Ltd Screen device for papermaking

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EP0541979A1 (en) * 1991-10-31 1993-05-19 J.M. Voith GmbH Screening apparatus
EP0955406A2 (en) * 1994-07-15 1999-11-10 Ahlstrom Machinery Corporation Method and apparatus for screening fibrous suspension
EP0795641A1 (en) * 1996-03-11 1997-09-17 Aikawa Iron Works Co., Ltd. Papermaking screen
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DE10233364C1 (en) * 2002-07-23 2003-12-24 Voith Paper Patent Gmbh Pressure sorter for sieving a fiber suspension
EP1462567A1 (en) 2003-03-27 2004-09-29 Andritz AG Screen for purification of fibrous pulp
WO2013010755A1 (en) * 2011-07-15 2013-01-24 Voith Patent Gmbh Pressure screen
CN103687991A (en) * 2011-07-15 2014-03-26 沃依特专利有限责任公司 Pressure screen
CN103687991B (en) * 2011-07-15 2016-08-17 沃依特专利有限责任公司 Pressure pulp screen

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CA2333800A1 (en) 2001-08-03
US6631809B2 (en) 2003-10-14
BR0100354A (en) 2001-10-02
ATA1702000A (en) 2001-07-15
ES2242662T3 (en) 2005-11-16
EP1124003B1 (en) 2005-05-11
US20010022284A1 (en) 2001-09-20
AT408772B (en) 2002-03-25
CN1180159C (en) 2004-12-15
ATE295446T1 (en) 2005-05-15
MXPA01001294A (en) 2005-08-16
CN1314515A (en) 2001-09-26
DE50106153D1 (en) 2005-06-16
EP1124003A3 (en) 2001-11-21

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