EP1124002B1 - Screen for purification of fibrous pulp - Google Patents

Screen for purification of fibrous pulp Download PDF

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Publication number
EP1124002B1
EP1124002B1 EP01101567A EP01101567A EP1124002B1 EP 1124002 B1 EP1124002 B1 EP 1124002B1 EP 01101567 A EP01101567 A EP 01101567A EP 01101567 A EP01101567 A EP 01101567A EP 1124002 B1 EP1124002 B1 EP 1124002B1
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EP
European Patent Office
Prior art keywords
rotor
baffle
screen
cone
infeed
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Revoked
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EP01101567A
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German (de)
French (fr)
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EP1124002A2 (en
EP1124002A3 (en
Inventor
Helmut 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 of EP1124002A3 publication Critical patent/EP1124002A3/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • 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 Pulp suspension, wherein a cylindrical sieve is provided.
  • Graders are machines used in the paper industry for cleaning a pulp suspension consisting of water, fiber and Dirt particles exists.
  • a feed stream over a Led sieve device wherein the accept current, consisting of water and fibers through which the sieve passes.
  • a partial flow, called The flow of the project, consisting of water, fibers and pollutants, is in the general at the opposite end of the feed stream deducted.
  • a separation of in Liquid present solid particles.
  • the liquid separated from the solid is rotationally symmetrical and consists of a Housing with a tangentially arranged inlet, a cylindrical Strainer basket, usually with holes or vertical slots provided and a rotating rotor.
  • the task of the rotor consists in the Freeing the sieve slots, which by just on the Siebober constitutional rotating wing is reached.
  • the accept stream is in one so-called acceptance space, which is often conical, collected and withdrawn radially at one point.
  • the reject current generally becomes on the side opposite the feed side of the screen basket in one mostly annular Rejektraum led and from this tangential deducted.
  • Such a sorter is e.g. from US 4,268,381.
  • the disadvantage of this sorting machines is that by a relatively large Rejektraum the risk of clogging low flow rates occurs. Furthermore, one occurs Non-uniform flow of the screen basket and uneven Flow conditions in acceptance space, especially in the area of Gustoffaustritts, up.
  • the aim of the invention is therefore to improve the To create flow conditions in the sorter, so that one Reduction of the energy used with increased production and To achieve dirt separation.
  • the invention is therefore characterized in that the acceptance space is configured in a double-conical manner and in the flow direction of the Fiber suspension expanded conically. So is a uniform Flow rate and thus optimal energy use achieved.
  • An advantageous embodiment of the invention is characterized in that that the accept space conically from the mouth of the accept outlet rejuvenated towards the reject outlet. This can be a consistent Flow rate can be achieved throughout the acceptance space.
  • An advantageous development of the invention is characterized in that that the sorter is designed as a double machine.
  • a favorable 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 on and flowed through, the drive side facing away from rotor part.
  • a favorable embodiment of the invention is characterized in that that the inlet takes place centrally from the side.
  • An advantageous embodiment of the invention is characterized in that that the sorter is arranged horizontally.
  • a favorable development of the invention is characterized in that that for pre-sorting a co-rotating with the rotor screen basket in Zulauf Schl is provided, wherein also in Vorsortier Buffalo Rails can be provided.
  • a favorable development of the invention is characterized in that that distributed on the rotor several wings in height and / or on the circumference are provided.
  • An advantageous embodiment of the invention is characterized in that that in the inlet region between the pipe socket and the end of the rotor stationary installation is provided, which are designed rotationally symmetrical can. This will be a significant improvement in the Flow conditions and subsequently a reduction of energy used.
  • An advantageous development of the invention is characterized in that that the installation a cone, a truncated cone, hemisphere, spherical segment, Sphere layer, paraboloid or bivalve hyperboloid.
  • a favorable embodiment of the invention is characterized in that that when installed as a cone or truncated cone, the cone angle ⁇ between 10 ° and 60 °.
  • a favorable development of the invention is characterized in that that the axis of the inlet nozzle is arranged parallel to the conical surface is. This allows the flow to be better managed and the Energy losses are further reduced.
  • a favorable alternative embodiment of the invention is characterized characterized in that the installation is a spiral body, wherein the Slope of the spiral can be chosen such that the Flow velocity in the inlet area over the entire Bin width is constant.
  • An advantageous development of the invention is characterized in that that the installation is arranged centrally.
  • Fig. 2 shows an alternative embodiment of the invention
  • Fig. 3 shows an embodiment a double machine
  • Fig. 4 shows the area for an integrated Presorting
  • Fig. 5 is a diagram of the dependence of the specific Energy for Sieb malströmung
  • Fig. 6 is a diagram of Schmutzticianredulement represents the Sieb thoroughlyströmung.
  • Fig. 1 shows a sorter 1, through an inlet nozzle 2 a Pulp suspension is supplied for cleaning.
  • an installation 3 is provided, which is shown here as a truncated cone is.
  • the "tip" of the truncated cone points here in the direction of the rotor 4th
  • the flank angle ⁇ of the truncated cone between 10 ° and 60 °.
  • the pulp suspension enters the room between the rotor 4 and sieve 5 and is passed through the sieve in the Acceptance room 6 promoted.
  • the housing of the acceptance space is executed conically, that is, the housing tapers approximately from the Upper edge of the accept outlet 7 conically towards the Rejektraum out, where the angle of acceptance space for a consistent Flow rate assuming uniform Outflow is designed through the sieve.
  • the rotor 4 of the sorter 1 is for a uniform Siebanströmung, which has a low thickening behavior above the screen height conditioned, designed. It has the form of a parabola, so that the Axial flow velocity within the screen basket at assumed uniform outflow through the sieve constant beibt. Alternatively, the shape of the rotor may also have a cone shape be approximated.
  • Fig. 2 shows an analog arrangement of a sorter 1, wherein here the Inlet nozzle 2 is arranged so that the suspension is parallel to the wall the truncated cone 3 is supplied. As a result, the energy loss, which is otherwise present at flow deflection, be avoided.
  • Fig. 3 shows the execution of a top machine, as they are for high Production services is carried out.
  • the rotor becomes e.g. when Double parabolic rotor 4, 4 'or double bevel rotor executed.
  • the Rejektabzug 8, 8 'and the strainer 5, 5' is in duplicate intended.
  • the accept space 6, 6 ' is designed doppelkonisch, i.e. turn, that the housing approximately from the top of the Acceptance outlet tapers conically towards the rejection space.
  • the pulp suspension is in turn fed via the supply nozzle 2 and in the illustrated embodiment axially guided by the rotor.
  • This type of flow is the drive-side rotor part 4 in height L1 equal to or greater than the on and flowed through, the drive side remote rotor part 4 'with the height L2.
  • the suspension occurs in the middle Area through openings 9 from the perfused rotor part 4 'and is distributed here in both directions. It occurs like a simple one Grader through the screen basket 5, 5 'through into the accept space 6, 6 ', which is also designed doppelkonisch here.
  • the reject flows both up and down and is here in one Reject space 8, 8 'discharged from the machine.
  • the inlet can also be done centrally from one side.
  • the accept outlet may be either double, i. above (7 ') or below (7) or simply be mounted centrally.
  • the sorting machine can do this also be executed in a lying form.
  • Fig. 4 now shows the upper part of a sorter 1 with an integrated Presorting.
  • the sorter 1 via the inlet nozzle 2 the Supplied pulp suspension.
  • a Vorsortier Scheme 10 provided in the suspension passes through a sieve 11. This allows specific heavy parts and large-scale contaminations that come from polluted or high contaminated pulp, be removed well.
  • a rotor 12 runs along with the rotor 4 via a Extension 13 is connected. The heavy parts leave the Vorsortier Scheme by a nozzle 14.
  • the rotor 12 can in Vorsortier Scheme 10 both in the feed stream (as shown) or in the Acceptance current, which then a further fine sorting in the lower range the sorter 1 is supplied, run. Does the rotor 12 in the feed stream, so by the rotating cleaning blades of the rotor 12, the strong Abrasive abrasive particles are held on the surface of the Turn sieves 11 open and damage them.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

A screen for cleaning a pulp suspension including a cylindrical screen basket and a double-conical accept chamber which widens in the flow direction of the pulp suspension.

Description

Die Erfindung betrifft einen Sortierer zur Reinigung einer Faserstoffsuspension, wobei ein zylindrisches Sieb vorgesehen ist.The invention relates to a sorter for cleaning a Pulp suspension, wherein a cylindrical sieve is provided.

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 Fejektstrom, bestehend aus Wasser, Fasern und Schmutzstoffen, wird im allgemeinen an dem dem Zulaufstrom gegenüberliegenden Ende abgezogen. Somit erfolgt bei den Sortierern eine Auftrennung von in Flüssigkeit vorliegenden festen Partikeln. Im Gegensatz dazu wird bei der Filtration die Flüssigkeit vom Feststoff abgetrennt. 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 einem 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 Gustoffaustritts, auf. Graders are machines used in the paper industry for cleaning a pulp suspension consisting of water, fiber and Dirt particles exists. In this case, a feed stream over a Led sieve device, wherein the accept current, consisting of water and fibers through which the sieve passes. A partial flow, called The flow of the project, consisting of water, fibers and pollutants, is in the general at the opposite end of the feed stream deducted. Thus, in the sorters, a separation of in Liquid present solid particles. In contrast, at the Filtration the liquid separated from the solid. In general, a Such sorter is rotationally symmetrical and consists of a Housing with a tangentially arranged inlet, a cylindrical Strainer basket, usually with holes or vertical slots provided and a rotating rotor. The task of the rotor consists in the Freeing the sieve slots, which by just on the Sieboberfläche rotating wing is reached. The accept stream is in one so-called acceptance space, which is often conical, collected and withdrawn radially at one point. The reject current generally becomes on the side opposite the feed side of the screen basket in one mostly annular Rejektraum led and from this tangential deducted. Such a sorter is e.g. from US 4,268,381. The disadvantage of this sorting machines is that by a relatively large Rejektraum the risk of clogging low flow rates occurs. Furthermore, one occurs Non-uniform flow of the screen basket and uneven Flow conditions in acceptance space, especially in the area of Gustoffaustritts, up.

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, so that one Reduction of the energy used with increased production and To achieve dirt separation.

Die Erfindung ist daher dadurch gekennzeichnet, daß der Akzeptraum doppel-konisch ausgestaltet ist und sich in Strömungsrichtung der Faserstoffsuspension konisch erweitert. So wird eine gleichmäßige Strömungsgeschwindigkeit und damit optimale Energienutzung erzielt.The invention is therefore characterized in that the acceptance space is configured in a double-conical manner and in the flow direction of the Fiber suspension expanded conically. So is a uniform Flow rate and thus optimal energy use achieved.

Eine vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass sich der Akzeptraum ab der Mündung des Akzeptauslasses konisch zum Rejektauslass hin verjüngt. Dadurch kann eine gleichbleibende Strömungsgeschwindigkeit im gesamten Akzeptraum erreicht werden.An advantageous embodiment of the invention is characterized in that that the accept space conically from the mouth of the accept outlet rejuvenated towards the reject outlet. This can be a consistent Flow rate can be achieved throughout the acceptance space.

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 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 on and flowed through, the drive side facing away from 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 takes place centrally 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 accept outlet is provided in duplicate.

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 development of the invention is characterized in that that for pre-sorting a co-rotating with the rotor screen basket in Zulaufbereich is provided, wherein also in Vorsortierbereich rotating Wings can be provided.

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

Eine vorteilhafte Ausgestaltung der Erfindung ist 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.An advantageous embodiment of the invention is characterized in that that in the inlet region between the pipe socket and the end of the rotor stationary installation is provided, which are designed rotationally symmetrical can. This will be a significant improvement in the Flow conditions and subsequently a reduction of 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 a cone, a truncated cone, hemisphere, spherical segment, Sphere layer, paraboloid or bivalve 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 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 development of the invention is characterized in that that the axis of the inlet nozzle is arranged parallel to the conical surface is. This allows the flow to be better managed and the Energy losses are further reduced.

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 characterized characterized in that the installation is a spiral body, wherein the Slope of the spiral can be chosen such that the Flow velocity in the inlet area over the entire Bin 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.

Die Erfindung wird nun im folgenden an Hand der Zeichnungen beispielhaft beschrieben, wobei Fig. 1 eine Ausgestaltung der Erfindung, Fig. 2 eine alternative Ausgestaltung der Erfindung, Fig. 3 eine Ausführung einer Doppelmaschine, Fig. 4 den Bereich für eine integrierte Vorsortierung, Fig. 5 ein Diagramm der Abhängigkeit der spezifischen Energie zur Siebdurchströmung und Fig. 6 ein Diagramm der Schmutzpunktreduktion zur Siebdurchströmung darstellt.The invention will now be described below with reference to the drawings 1, an embodiment of the invention, Fig. 2 shows an alternative embodiment of the invention, Fig. 3 shows an embodiment a double machine, Fig. 4 shows the area for an integrated Presorting, Fig. 5 is a diagram of the dependence of the specific Energy for Siebdurchströmung and Fig. 6 is a diagram of Schmutzpunktreduktion represents the Siebdurchströmung.

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 hier in Richtung des Rotors 4. 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 coppelkonisch ausgeführt, d.h., das Gehäuse verjüngt sich etwa ab der Oberkante 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, through an inlet nozzle 2 a Pulp suspension is supplied for cleaning. In the area of Zulaufes an installation 3 is provided, which is shown here as a truncated cone is. The "tip" of the truncated cone points here in the direction of the rotor 4th For optimum deflection, the flank angle α of the truncated cone between 10 ° and 60 °. The pulp suspension enters the room between the rotor 4 and sieve 5 and is passed through the sieve in the Acceptance room 6 promoted. The housing of the acceptance space is executed conically, that is, the housing tapers approximately from the Upper edge of the accept outlet 7 conically towards the Rejektraum out, where the angle of acceptance space for a consistent Flow rate assuming uniform Outflow is designed through the sieve.

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 beibt. Alternativ kann die Form des Rotors auch über eine Konusform angenähert werden.The rotor 4 of the sorter 1 is for a uniform Siebanströmung, which has a low thickening behavior above the screen height conditioned, designed. It has the form of a parabola, so that the Axial flow velocity within the screen basket at assumed uniform outflow through the sieve constant beibt. Alternatively, the shape of the rotor may also have a cone shape be approximated.

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 discharge the reject accordingly, the Rejektraum designed such that flow rates greater than 2.5 m / sec with or without additional introduction of stirring energy by the rotor available. As a result, a blockage is virtually avoided.

Fig. 2 zeigt eine analoge Anordnung eines Sortierers 1, wobei hier der Zulaufstutzen 2 so angeordnet ist, daß die Suspension parallel zur Wand 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, wherein here the Inlet nozzle 2 is arranged so that the suspension is parallel to the wall the truncated cone 3 is supplied. As a result, the energy loss, which is otherwise present at flow deflection, 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 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 they are for high Production services is carried out. At this time, the rotor becomes e.g. when Double parabolic rotor 4, 4 'or double bevel rotor executed. Also the Rejektabzug 8, 8 'and the strainer 5, 5' is in duplicate intended. Again, the accept space 6, 6 'is designed doppelkonisch, i.e. turn, that the housing approximately from the top of the Acceptance outlet tapers conically towards the rejection space. The pulp suspension is in turn fed via the supply nozzle 2 and in the illustrated embodiment axially guided by the rotor. at This type of flow is the drive-side rotor part 4 in height L1 equal to or greater than the on and flowed through, the drive side remote rotor part 4 'with the height L2. The suspension occurs in the middle Area through openings 9 from the perfused rotor part 4 'and is distributed here in both directions. It occurs like a simple one Grader through the screen basket 5, 5 'through into the accept space 6, 6 ', which is also designed doppelkonisch here. The reject flows both up and down and is here in one Reject space 8, 8 'discharged from the machine. With another Embodiment, the inlet can also be done centrally from one side. The accept outlet may be either double, i. above (7 ') or below (7) or simply be mounted centrally. The sorting machine can do this also be executed in a lying form.

Fig. 4 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.Fig. 4 now shows the upper part of a sorter 1 with an integrated Presorting. Here, the sorter 1 via the inlet nozzle 2 the Supplied pulp suspension. In order to pre-sort a Heavy separation is at the top of the Sorter 1 a Vorsortierbereich 10 provided in the suspension passes through a sieve 11. This allows specific heavy parts and large-scale contaminations that come from polluted or high contaminated pulp, be removed well. Outside of the screen 11, a rotor 12 runs along with the rotor 4 via a Extension 13 is connected. The heavy parts leave the Vorsortierbereich by a nozzle 14. The rotor 12 can in Vorsortierbereich 10 both in the feed stream (as shown) or in the Acceptance current, which then a further fine sorting in the lower range the sorter 1 is supplied, run. Does the rotor 12 in the feed stream, so by the rotating cleaning blades of the rotor 12, the strong Abrasive abrasive particles are held on the surface of the Turn sieves 11 open and damage them.

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 keineren Verunreinigungen führt zur Leistungssteigerungen (Durchsatz und Effektivitätssteigerung) gegenüber herkömmlichen Sortiermaschinen. Für hohe Produktionsleistungen kann auch diese Variante mit einem Doppelkegelrotor ausgeführt werden.Hiebei the specific heavy parts are centrifuged outwards. This is on the one hand a longer life of the baskets in Presorting achieved on the other hand, by the targeted barrier means Presort basket a sustained holding of heavy parts in the achieved centrifugal Nachsortierbereich. This causes the rotors, since they rotate in the accepts of the first stage, longer at the start edges be loaded, have a lower abrasion and energy intake and thus employed closer to the screen surface of the screen 5 can be without damaging the rotor or the Sieboberfläche to be triggered. The separate discharge of coarse and no impurities lead to increased performance (throughput and increase in efficiency) compared to conventional sorting machines. For high production rates, this variant can also be equipped with a Bicone rotor are running.

Fig. 5 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.5 shows the diagram of the energy requirement via the screen flow, Here is a curve for previous sorter and a Curve for the sorter according to the invention with a tapered installation is shown in the Zulaufraum.

In Fig. 6 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. 6, the Schmutzpunktreduktion on the Siebdurchströmung shown. Here it can be seen that by a conical installation in Zulaufraum also the Schmutzpunktreduktion be substantially increased could, while reducing the specific energy requirement.

Claims (19)

  1. Screen for cleaning a pulp suspension, where a cylindrical screen basket is provided, characterized by the accept chamber (6, 6') being designed double-conically and becoming wider in the flow direction of the pulp suspension.
  2. Device according to Claim 1, characterized by the accept chamber (6,6') tapering between the mouth of the accept discharge (7, 7') and the reject discharge (8, 8').
  3. Device according to Claim 1 or 2, characterized by the screen (1) being designed as double machine.
  4. Device according to Claim 3, characterized by the infeed taking place axially through the rotor (4).
  5. Device according to Claim 4, characterized by the drive-side rotor part (4) being of the same height as or higher than the rotor part (4') on the other side of the drive into which and through which the pulp flows.
  6. Device according to Claim 5, characterized by the infeed taking place centrally from the side.
  7. Device according to one of the Claims 3 to 6, characterized by two accept discharges (7, 7') being provided.
  8. Device according to one of the Claims 1 to 7, characterized by the screen (1) being arranged horizontally.
  9. Device according to one of the Claims 1 to 8, characterized by a screen basket (11) which turns together with the rotor (12) being provided for pre-screening in the infeed area.
  10. Device according to Claim 9, characterized by rotating blades being provided in the pre-screening area (10).
  11. Device according to one of the Claims 1 to 10, characterized by the rotor (4, 4') having several blades arranged at different heights and/or distributed over the circumference.
  12. Device according to one of the Claims 1 to 11, characterized by a stationary baffle (3) being provided in the infeed area between the tube branch (2) and the free end of the rotor (4).
  13. Device according to Claim 12, characterized by the baffle (3) being designed rotationally symmetrically.
  14. Device according to Claim 13, characterized by the baffle (3) being a cone, truncated cone, hemisphere, spherical segment, spherical segment between two parallel circles, a paraboloid, or a hyperboloid of two sheets.
  15. Device according to Claim 14, with a baffle (3) in the form of a cone or truncated cone, characterized by the cone angle α amounting to between 10° and 60°.
  16. Device according to Claim 15, characterized by the axis of the infeed branch being arranged in parallel to the cone shell.
  17. Device according to Claim 13, characterized by the baffle (3) being a spiral-shaped body.
  18. Device according to Claim 17, characterized by the pitch of the spiral being selected such that the flow speed in the infeed area is kept constant over the entire screen basket width.
  19. Device according to one of the Claims 12 to 18, characterized by the baffle (3) being arranged centrically.
EP01101567A 2000-02-03 2001-01-25 Screen for purification of fibrous pulp Revoked EP1124002B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0016300A AT408770B (en) 2000-02-03 2000-02-03 SORTER FOR CLEANING A FIBER SUSPENSION
AT1632000 2000-02-03

Publications (3)

Publication Number Publication Date
EP1124002A2 EP1124002A2 (en) 2001-08-16
EP1124002A3 EP1124002A3 (en) 2001-11-21
EP1124002B1 true EP1124002B1 (en) 2005-03-09

Family

ID=3652162

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01101567A Revoked EP1124002B1 (en) 2000-02-03 2001-01-25 Screen for purification of fibrous pulp

Country Status (9)

Country Link
US (1) US6499603B2 (en)
EP (1) EP1124002B1 (en)
CN (1) CN1180161C (en)
AT (2) AT408770B (en)
BR (1) BR0100351A (en)
CA (1) CA2333802A1 (en)
DE (1) DE50105500D1 (en)
ES (1) ES2238345T3 (en)
MX (1) MXPA01001292A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6915910B2 (en) * 2001-04-16 2005-07-12 J&L Fiber Services, Inc. Screen cylinder and method
DE10233364C1 (en) * 2002-07-23 2003-12-24 Voith Paper Patent Gmbh Pressure sorter for sieving a fiber suspension
AT413390B (en) 2003-03-27 2006-02-15 Andritz Ag Maschf SORTER FOR CLEANING A FIBER SUSPENSION
FI117867B (en) 2004-12-10 2007-03-30 Metso Paper Inc Sorter and method for sorting the pulp
CN106079150A (en) * 2016-06-30 2016-11-09 重庆浩立塑胶有限公司 Feeding material choosing apparatus
CN108482960A (en) * 2018-04-25 2018-09-04 新乡市东振机械制造有限公司 A kind of screw conveyor with screening function
CN108606148A (en) * 2018-06-18 2018-10-02 张方富 A kind of preparation method and its device of pyrus nivalis apple oat soft sweets
CN109174627B (en) * 2018-10-29 2023-04-25 天津绿之本生物科技有限公司 Fertilizer screening machine
CN112845081B (en) * 2021-01-26 2022-09-06 衢州宝红建材有限公司 Multistage centrifugal screening equipment of gravel and sand edulcoration
CN116140177B (en) * 2023-02-24 2024-07-05 中材江苏太阳能新材料有限公司 Quartz sand feeding device for photovoltaic quartz tube

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4268381A (en) * 1979-05-03 1981-05-19 Uniweld Inc. Rotary pulp screening device of the vertical pressure type
FI82493C (en) * 1989-06-05 1991-03-11 Tampella Oy Ab pulper
IL91150A (en) * 1989-07-28 1991-05-12 Amrad Res & Dev Filter
US5096127A (en) * 1990-08-22 1992-03-17 Ingersoll-Rand Company Apparatus for pressurized screening of a fibrous material liquid suspension
DE4135854A1 (en) * 1991-10-31 1993-05-06 J.M. Voith Gmbh, 7920 Heidenheim, De SORTER
EP0646199B1 (en) * 1992-06-20 1996-12-11 Hermann Finckh Maschinenfabrik GmbH & Co. Pressure sorter for fibre suspensions

Also Published As

Publication number Publication date
BR0100351A (en) 2001-10-02
DE50105500D1 (en) 2005-04-14
CN1180161C (en) 2004-12-15
US20010019025A1 (en) 2001-09-06
ATA1632000A (en) 2001-07-15
ATE290625T1 (en) 2005-03-15
CA2333802A1 (en) 2001-08-03
US6499603B2 (en) 2002-12-31
MXPA01001292A (en) 2005-08-16
EP1124002A2 (en) 2001-08-16
ES2238345T3 (en) 2005-09-01
EP1124002A3 (en) 2001-11-21
AT408770B (en) 2002-03-25
CN1310259A (en) 2001-08-29

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