EP1342832B1 - Process for sorting waste paper for recovering paper for de-inking - Google Patents

Process for sorting waste paper for recovering paper for de-inking Download PDF

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Publication number
EP1342832B1
EP1342832B1 EP03004352A EP03004352A EP1342832B1 EP 1342832 B1 EP1342832 B1 EP 1342832B1 EP 03004352 A EP03004352 A EP 03004352A EP 03004352 A EP03004352 A EP 03004352A EP 1342832 B1 EP1342832 B1 EP 1342832B1
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EP
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Prior art keywords
paper
goods
collected
zigzag
blown
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EP03004352A
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German (de)
French (fr)
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EP1342832A2 (en
EP1342832A3 (en
Inventor
Frank Rosenboom
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Veolia Umweltservice Beteiligungsverwaltungs GmbH
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Sulo Nord West GmbH and Co KG
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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
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means
    • D21B1/026—Separating fibrous materials from waste
    • D21B1/028—Separating fibrous materials from waste by dry methods

Definitions

  • the present invention relates to a method for sorting waste paper collection stock to obtain deinking paper.
  • Waste paper is today collected on a large scale in various ways in order to extract raw materials for recycling.
  • the waste paper collection product comprises a wide range of ingredients, such as e.g. Cardboard and cardboard boxes, newspapers and magazines, heavy products such as catalogs and directories, and so on.
  • ingredients such as e.g. Cardboard and cardboard boxes, newspapers and magazines, heavy products such as catalogs and directories, and so on.
  • deinking or deinking paper is required, consisting mainly of newspapers, magazines and similar paper products.
  • a method for sorting waste paper collection is known, with the higher quality waste paper types, especially deinking paper, to be obtained from the recovered paper collection.
  • the waste paper collection material is in turn first introduced into a shredding device, so as to obtain the collected goods shredded into possible equal size chips.
  • the shredded wastepaper collection material is then introduced into the entrance of a zigzag sifter, through which air is blown in countercurrent. This blows lighter paper up the zigzag sifter while discharging the heavier fraction falling down as a mixed paper.
  • the blown up lighter collected goods is introduced into a second zigzag sifter, through which air is also blown in countercurrent, so as to separate any remaining heavier parts and cardboard, which fall down from the second zigzag sifter.
  • the light collected goods blown out of the second zigzag sifter are collected as deinking paper. Also in this method, it is necessary to first shred the waste paper collection in small pieces as uniform size as possible, so that with the subsequent air classification sufficient separation can be achieved.
  • the uncut bulk is subjected to coarse screening to separate large cardboard and board pieces and also fine screening to remove small contaminants such as plastic parts, glass and the like.
  • the remaining collected material then passes through an intermediate-band air separation in the cross-flow, the blown out lighter collected goods is supplied to the further process steps, while failed heavier parts are discharged to a separate further treatment.
  • the intermediate-band wind sifter has the function to separate the very heavy portion of the sifted collected goods. These are primarily heavier boards, heavier catalogs and heavy rubbish.
  • the collected goods blown out in the antiband-Luftsichtung is introduced into the inlet of a zigzag sifter, through which air is blown in countercurrent, with the air flow adjusted to blow lighter paper up the zigzag sifter.
  • the paper blown out of the zigzag sifter is collected as deinking paper.
  • the heavier collected material coming down from the first zigzag sifter may be introduced into the entrance of a second zigzag sifter to blow up the remaining lighter paper product up and in circulation to transport back to the entrance of the first zigzag sifter.
  • the second zigzag sifter it is preferable to work with a stronger counterflow.
  • the waste paper collection material is loaded into a delivery point 2 and transported by a conveyor belt to a screening device 6 for coarse screening in order to separate large cardboard and cardboard pieces.
  • the mesh width of the screening device 6 can be determined, for example, by square sieve openings with side lengths of about 0.5 m or round sieve openings with a diameter of 0.5 m.
  • the remaining material is subjected to a fine screening in a screening drum 8, in which small parts, such as plastic parts, glasses or other small impurities are separated.
  • the screen width of the screening drum 8 can be selected so that parts with a maximum extent of less than 170 mm are discarded.
  • the screened material is separated by application to a high-speed conveyor belt whose speed can be about 2-3 m / s.
  • the material is raised by means of a nozzle (not shown) installed below the conveyor head by means of air, which in this example has a flow rate of 10-15 m / s, raising more light materials and into the suction flow of a suction hood 12, while the heavier materials fall on a lower conveyor belt.
  • manual post-sorting can still be carried out in order to separate boards from pasted, heavy catalogs and the like.
  • the collected in the intermediate belt air classification, freed from the very heavy materials collected goods is now fed to a two-stage zigzag sifter.
  • the material falls from above via a rotary valve into the entrance 20 of an oblong container of rectangular cross section, which is vertically positioned and has a plurality of zigzag windings in the longitudinal direction and forms a first zigzag sifter 21.
  • the first zigzag sifter 21 is traversed from bottom to top by a strong air flow, in which the air flow velocity
  • 8 - 10 m / s may be, wherein the cross-sectional area of the flow channel of the first zigzag sifter in this example is 1.44 m 2 .
  • the collected goods must thus fall down against the flow of air through the zigzag path, with a significant portion of the newspapers already flaking and thereby appearing as a lighter material in countercurrent through its increased effective surface area.
  • Lighter materials such as unfolded newspapers and magazines are entrained upward and sucked from an upper outlet 24 of the first zigzag sifter 21, and no longer need to be rearranged.
  • the heavier boards and still folded newspapers fall down through the first zigzag sifter 21 and exit at its lower exit 22.
  • This product emerging from the lower outlet 22 of the first zigzag sifter 21 is now treated according to the same principle in a second zigzag sifter 31 by being transported to its inlet 30.
  • the flow rate can be for example 10 - 14 m / s.
  • the cross-sectional area of the second zigzag sifter is 1 m 2 in this example.
  • folded newspapers have once again opportunity to unfold when falling through the zigzag sifter 31 in countercurrent.
  • the lighter material blown upwards in the second zigzag sifter 31 is sucked off at an upper outlet 34 of the second zigzag sifter 31 and returned to the first zigzag sifter 21 and introduced into its inlet 20. In this way, the material runs through the circuit until it is either sucked out of the upper output 24 of the first zigzag sifter 21 as Deinkingpapier or falls through the lower output 32 of the second zigzag sifter 31.
  • the material discharged from the upper exit 24 of the first zigzag sifter 21 is collected as deinking paper, while the material dropped out of the lower exit 32 of the second zigzag sifter 31 is removed as mixed paper or subjected to further sorting steps.
  • FIG. 2 shows a zigzag classifier 21 which is particularly suitable for use with the method.
  • the upper input 20 is used to introduce the collected goods.
  • the leading to the upper output line 24 branches off at some distance below the upper input 20 from the zigzag separator 21, so heavier cardboard can not get directly into the exhaust air flow into the output 24.
  • the zigzag sifter 21 has a plurality of arcuate sections 25 which are assembled to provide a serpentine flow channel. This arcuate design prevents the formation of material nests and supports the complete flipping of newspapers.

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

Abstract

To sort used paper, a coarse sieve (6) separates cardboard and a fine sieve drum (8) separates impurities. The remaining used paper is carried on a high speed belt for wind sifting, as it is, and only the paper blown out is used for further processing while the heavier material is gathered for special treatment. The blown-out paper is caught by a suction hood (12) to be passed into the entry (20) of a zigzag sifter (21), where a counter air flow is blown through. The air flow is set so that the lighter paper material is blown upward through the outlet (24) to be gathered as paper where ink can be removed. The paper taken from the bottom of the zigzag sifter is passed to the entry (30) at a second zigzag sifter (31), and the lighter material taken from the upper outlet is returned to the entry of the first sifter, and the remainder is taken as mixed paper from the lower outlet (32).

Description

Die vorliegende Erfindung betrifft ein Verfahren zum Sortieren von Altpapiersammelware zum Gewinnen von Deinkingpapier.The present invention relates to a method for sorting waste paper collection stock to obtain deinking paper.

Altpapier wird heute auf verschiedenen Wegen in großem Umfang gesammelt, um daraus Rohstoffe für die Wiederverwertung zu gewinnen. Die Altpapiersammelware umfasst ein breites Spektrum von Inhaltsstoffen, wie z.B. Pappen und Kartons, Zeitungen und Zeitschriften, schwere Produkte wie Kataloge und Telefonbücher, und dergleichen mehr. Für die Wiederverwertung ist es notwendig, die unterschiedlichen Inhaltsstoffe voneinander zu trennen. Für die Herstellung von Papier wird eine Fraktion aus der Altpapiersammelware benötigt, die als Deinking-Qualität oder Deinkingpapier bezeichnet wird und zum Großteil aus Zeitungen, Zeitschriften und ähnlichen Papierprodukten besteht.Waste paper is today collected on a large scale in various ways in order to extract raw materials for recycling. The waste paper collection product comprises a wide range of ingredients, such as e.g. Cardboard and cardboard boxes, newspapers and magazines, heavy products such as catalogs and directories, and so on. For recycling, it is necessary to separate the different ingredients from each other. For the production of paper, a fraction of waste paper collection called deinking or deinking paper is required, consisting mainly of newspapers, magazines and similar paper products.

Aus DE-A-199 57 548 ist ein Verfahren zum Sortieren von Altpapiersammelware bekannt, mit dem Deinkingpapier aus der Altpapiersammelware gewonnen wird. Die Altpapiersammelware wird einer Grobsiebung zum Abtrennen großer Pappstücke unterzogen. Die verbleibende Sammelware wird zerkleinert, vorzugsweise auf eine Korngröße im Bereich von 30 bis 60 mm, so dass nur noch relativ kleine Schnipsel übrig bleiben. Die so zerkleinerte Sammelware wird einer Windsichtung unterzogen, wobei auch die Möglichkeit einer Windsichtung im Querstrom erwähnt ist. Durch die Windsichtung wird die zerkleinerte Sammelware in eine leichtere Fraktion, die als Deinkingpapier gewonnen wird, und in eine schwerere Fraktion aufgeteilt, die als Mischpapier abgeführt wird. Ein schwerwiegender Nachteil des Verfahrens liegt darin, dass die Zerkleinerung der gesamten Sammelware nötig ist, was den Aufbau und den Betrieb von nach solchen Verfahren arbeitenden Sortieranlagen sehr aufwendig macht.From DE-A-199 57 548 a method for sorting waste paper collection is known, with the deinking paper from the waste paper collection is won. The waste paper collection material is subjected to coarse screening to separate large pieces of cardboard. The remaining collected material is crushed, preferably to a particle size in the range of 30 to 60 mm, so that only relatively small pieces remain. The so shredded collected goods is subjected to an air classification, whereby the possibility of an air classification in cross-flow is mentioned. By air classification, the shredded bulk material is divided into a lighter fraction, which is obtained as deinking paper, and into a heavier fraction, which is discharged as mixed paper. A serious disadvantage of the method is that the comminution of the entire collected goods is necessary, which makes the construction and operation of working by such methods sorting very expensive.

Aus DE-A-25 42 571 ist ein Verfahren zum Sortieren von Altpapiersammelware bekannt, mit dem höherwertige Altpapiersorten, insbesondere Deinkingpapier, aus der Altpapiersammelware gewonnen werden sollen. Die Altpapiersammelware wird wiederum zunächst in eine Zerkleinerungseinrichtung eingeführt, um so die Sammelware in möglich gleich große Schnipsel zerkleinert zu erhalten. Die zerkleinerte Altpapiersammelware wird dann in den Eingang eines Zickzacksichters eingeführt, durch den im Gegenstrom Luft geblasen wird. Dadurch wird leichtere Papierware nach oben aus dem Zickzacksichter herausgeblasen, während die nach unten herausfallende schwerere Fraktion als Mischpapier abgeführt wird. Die nach oben herausgeblasene leichtere Sammelware wird in einen zweiten Zickzacksichter eingeführt, durch den ebenfalls im Gegenstrom Luft geblasen wird, um so noch vorhandene schwerere Teile und Pappen abzutrennen, die nach unten aus dem zweiten Zickzacksichter herausfallen. Die aus dem zweiten Zickzacksichter nach oben herausgeblasene leichte Sammelware wird als Deinkingpapier gesammelt. Auch bei diesem Verfahren ist es nötig, die Altpapiersammelware zunächst in kleine Stücke möglichst einheitlicher Größe zu zerkleinern, damit mit den anschließenden Windsichtungen eine ausreichende Separation erreicht werden kann.From DE-A-25 42 571 a method for sorting waste paper collection is known, with the higher quality waste paper types, especially deinking paper, to be obtained from the recovered paper collection. The waste paper collection material is in turn first introduced into a shredding device, so as to obtain the collected goods shredded into possible equal size chips. The shredded wastepaper collection material is then introduced into the entrance of a zigzag sifter, through which air is blown in countercurrent. This blows lighter paper up the zigzag sifter while discharging the heavier fraction falling down as a mixed paper. The blown up lighter collected goods is introduced into a second zigzag sifter, through which air is also blown in countercurrent, so as to separate any remaining heavier parts and cardboard, which fall down from the second zigzag sifter. The light collected goods blown out of the second zigzag sifter are collected as deinking paper. Also in this method, it is necessary to first shred the waste paper collection in small pieces as uniform size as possible, so that with the subsequent air classification sufficient separation can be achieved.

Aus DE-A-100 14 872 ist ein Verfahren zum Sortieren von Altpapiersammelware zum Gewinnen von Deinkingpapier bekannt, bei dem die unzerkleinerte Sammelware einer Grobsiebung zum Abtrennen großer Pappstücke unterzogen wird. Anschließend wird eine Zerkleinerung auf eine Korngröße im Bereich von etwa 40 bis 80 mm durchgeführt. Die verbliebene Sammelware wird dann so zerkleinert einer ersten Windsichtung unterzogen und nur die herausgeblasene Sammelware als eine erste, Deinkingpapier enthaltende Leichtgutfraktion abgetrennt. Die bei der Windsichtung durchgefallenen schwereren Teile werden zu einer gesonderten Weiterbehandlung abgeführt. Eine weitere Behandlung der bei der Windsichtung herausgeblasenen Sammelware ist nicht vorgesehen. Auch bei diesem Verfahren ist es notwendig, die Altpapiersammelware zunächst in kleine Stücke möglichst einheitlicher Größe zu zerkleinern, damit mit der anschließenden Windsichtung eine ausreichende Separation erreicht werden kann.From DE-A-100 14 872 a method for sorting waste paper collection stock to obtain deinking paper is known, in which the uncut collection goods are subjected to coarse screening to separate large pieces of cardboard. Subsequently, a comminution to a particle size in the range of about 40 to 80 mm is performed. The remaining collected material is then comminuted subjected to a first air classification and separated only the blown-out bulk goods as a first, Deinkingpapier containing light material fraction. The fallen through in the air classification heavier parts are removed to a separate further treatment. Further treatment of blown out in the air classification collected goods is not provided. Also in this method, it is necessary to first shred the waste paper collection in small pieces as uniform size as possible, so that with the subsequent air classification sufficient separation can be achieved.

Soweit bisher ohne Zerkleinerung der Altpapiersammelware gearbeitet wurde, so war es üblich, die Altpapiersammelware zunächst in eine Siebvorrichtung zu führen, um große Pappstücke abzutrennen. Anschließend wurde die so vorbereitete Sammelware auf Sortierbändern manuell nachsortiert, um in dem Material befindliche kleinere Pappen, Verunreinigungen und dergleichen zu entfernen, um so Sammelware mit Deinking-Qualität zu gewinnen. Der Personal- und damit Kostenaufwand ist bei dieser Verfahrensweise erheblich.As far as previously worked without crushing the waste paper collection, so it was customary to first carry the waste paper collection in a screening device to separate large pieces of cardboard. Subsequently, the thus prepared collected goods were manually sorted on sorting belts to remove located in the material smaller boards, impurities and the like, so as to obtain collected deinking quality. The personnel and thus cost is considerable in this procedure.

Es ist Aufgabe der vorliegenden Erfindung, ein Verfahren zum Sortieren von Altpapiersammelware anzugeben, das einfacher und kostengünstiger durchführbar ist.It is an object of the present invention to provide a method for sorting waste paper collection, which is easier and less expensive to carry out.

Zur Lösung dieser Aufgabe dient das Verfahren mit den Merkmalen des Anspruchs 1. Vorteilhafte Ausführungsformen der Erfindung sind in den Unteransprüchen angegeben.To solve this problem, the method with the features of claim 1. Advantageous embodiments of the invention are set forth in the dependent claims.

Mit dem vorliegenden Verfahren ist es möglich, die Sortierung ohne Zerkleinerung der Altpapiersammelware durchzuführen, was das Verfahren erheblich einfacher und kostengünstiger macht. Daneben kann der Personalbedarf bei der manuellen Nachsortierung erheblich reduziert werden. Die unzerkleinerte Sammelware wird einer Grobsiebung zum Abtrennen großer Papp- und Kartonstücke und ferner einer Feinsiebung zum Abtrennen von kleinen Verunreinigungen, wie etwa Kunststoffteilen, Glas und dergleichen, unterzogen. Die verbliebene Sammelware durchläuft dann eine Zwischenband-Windsichtung im Querstrom, wobei die herausgeblasene leichtere Sammelware den weiteren Verfahrensschritten zugeführt wird, während durchgefallene schwerere Teile zu einer gesonderten Weiterbehandlung abgeführt werden. Die Zwischenband-Windsichtung hat die Funktion, den sehr schweren Anteil der gesiebten Sammelware abzutrennen. Hierbei handelt es sich in erster Linie um schwerere Pappen, schwerere Kataloge und schweren Unrat.With the present method, it is possible to perform the sorting without crushing the waste paper collection, which makes the process much easier and less expensive. In addition, the need for manual manual sorting can be significantly reduced. The uncut bulk is subjected to coarse screening to separate large cardboard and board pieces and also fine screening to remove small contaminants such as plastic parts, glass and the like. The remaining collected material then passes through an intermediate-band air separation in the cross-flow, the blown out lighter collected goods is supplied to the further process steps, while failed heavier parts are discharged to a separate further treatment. The intermediate-band wind sifter has the function to separate the very heavy portion of the sifted collected goods. These are primarily heavier boards, heavier catalogs and heavy rubbish.

Die in der Zwischenband-Windsichtung herausgeblasene Sammelware wird in den Eingang eines Zickzacksichters eingeführt, durch den Luft im Gegenstrom geblasen wird, wobei der Luftstrom so eingestellt ist, dass leichtere Papierware aus dem Zickzacksichter nach oben herausgeblasen wird. In dem Zickzacksichter blättern sich Zeitungen auf, d.h. ihre effektive Oberfläche vergrößert sich, so dass sie vom Luftstrom nach oben getragen werden können. Das aus dem Zickzacksichter nach oben herausgeblasene Papier wird als Deinkingpapier gesammelt. Es hat sich gezeigt, dass nach den Schritten der Grobsiebung und Feinsiebung die Kombination einer Zwischenbandwindsichtung und einer Sichtung im Zickzacksichter effektiv ist, um problematische Bestandteile der Sammelware, wie geschlossene oder feuchte Zeitungen, die relativ schwer sind, aufzublättern, so dass auch diese Bestandteile als Deinkingpapier gesammelt werden können. Die Zwischenband-Windsichtung in Kombination mit der Windsichtung im Zickzacksichter hat sich als so effektiv erwiesen, dass eine Zerkleinerung der Altpapiersammelware unnötig ist.The collected goods blown out in the Zwischenband-Luftsichtung is introduced into the inlet of a zigzag sifter, through which air is blown in countercurrent, with the air flow adjusted to blow lighter paper up the zigzag sifter. In the zigzag sifter newspaper piles up, ie their effective surface increases, so that they can be carried upwards by the current of air. The paper blown out of the zigzag sifter is collected as deinking paper. It has been found that after the coarse screening and fine screening steps, the combination of an intermediate strip wind sifting and a squeegee sifter sighting is effective to flatten problematic components of the collected item, such as closed or wet newspapers, which are relatively heavy, so that these components as well Deinkingpapier can be collected. The intermediate-band air classification in combination with the air separation in the zigzag sifter has proven to be so effective that comminution of waste paper collection material is unnecessary.

Wenn die Effektivität des Verfahrens dahingehend gesteigert werden soll, dass eine höhere Ausbeute an Deinkingpapier gewonnen wird, kann die aus dem ersten Zickzacksichter unten austretende schwerere Sammelware in den Eingang eines zweiten Zickzacksichters eingeführt werden, um die noch verbliebene leichtere Papierware nach oben herauszublasen und im Kreislauf zurück zum Eingang des ersten Zickzacksichters zu transportieren. Dadurch können noch verbliebene geschlossene Zeitungen und dergleichen aufgeblättert werden und als Deinkingpapier gewonnen werden. In dem zweiten Zickzacksichter wird vorzugsweise mit einem stärkeren Gegenstrom gearbeitet.If the effectiveness of the process is to be increased so that a higher yield of deinking paper is obtained, the heavier collected material coming down from the first zigzag sifter may be introduced into the entrance of a second zigzag sifter to blow up the remaining lighter paper product up and in circulation to transport back to the entrance of the first zigzag sifter. As a result, still remaining closed newspapers and the like can be exfoliated and recovered as deinking paper. In the second zigzag sifter, it is preferable to work with a stronger counterflow.

Die Erfindung wird im Folgenden anhand eines Ausführungsbeispiels in den Zeichnungen erläutert, in denen

Figur 1
eine schematische Darstellung einer Anlage zur Durchführung des Verfahrens ist, und
Figur 2
eine schematische perspektivische Darstellung eines in dem Verfahren verwendeten Zickzacksichters ist.
The invention is explained below with reference to an embodiment in the drawings, in which
FIG. 1
is a schematic representation of an installation for carrying out the method, and
FIG. 2
a schematic perspective view of an in zigzag separator used in the process.

Die Altpapiersammelware wird in einen Aufgabepunkt 2 geladen und mit einem Förderband zu einer Siebeinrichtung 6 zur Grobsiebung transportiert, um große Papp- und Kartonstücke abzutrennen. Die Siebweite der Siebeinrichtung 6 kann beispielsweise durch quadratische Sieböffnungen mit Seitenlängen von etwa 0,5 m oder runde Sieböffnungen mit einem Durchmesser von 0,5 m bestimmt sein. Nach der Grobsiebung wird das verbliebene Material in einer Siebtrommel 8 einer Feinsiebung unterzogen, bei der kleine Teile, wie Kunststoffteile, Gläser oder sonstige kleine Verunreinigungen abgetrennt werden. Die Siebweite der Siebtrommel 8 kann so gewählt sein, dass Teile mit einer maximalen Ausdehnung von weniger als 170 mm ausgesondert werden.The waste paper collection material is loaded into a delivery point 2 and transported by a conveyor belt to a screening device 6 for coarse screening in order to separate large cardboard and cardboard pieces. The mesh width of the screening device 6 can be determined, for example, by square sieve openings with side lengths of about 0.5 m or round sieve openings with a diameter of 0.5 m. After coarse screening, the remaining material is subjected to a fine screening in a screening drum 8, in which small parts, such as plastic parts, glasses or other small impurities are separated. The screen width of the screening drum 8 can be selected so that parts with a maximum extent of less than 170 mm are discarded.

Das gesiebte Material wird durch Aufbringen auf ein schnelllaufendes Förderband, dessen Geschgwindigkeit etwa 2-3 m/s betragen kann, vereinzelt. Am Ende des Förderbandes wird das Material durch eine unter dem Förderbandkopf installierte Düse (nicht gezeigt) mittels Luft, die in diesem Beispiel eine Strömungsgeschwindigkeit von 10 - 15 m/s hat, angehoben, wobei leichte Materialien stärker angehoben werden und in den Saugstrom einer Absaughaube 12 gelangen, während die schwereren Materialien auf ein tieferliegendes Förderband fallen. Bei dem in der Zwischenband-Windsichtung durchgefallenen Materialen kann noch eine manuelle Nachsortierung durchgeführt werden, um hier Pappen von verklebten, schweren Katalogen und dergleichen zu trennen.The screened material is separated by application to a high-speed conveyor belt whose speed can be about 2-3 m / s. At the end of the conveyor belt, the material is raised by means of a nozzle (not shown) installed below the conveyor head by means of air, which in this example has a flow rate of 10-15 m / s, raising more light materials and into the suction flow of a suction hood 12, while the heavier materials fall on a lower conveyor belt. In the case of materials which have fallen through in the intermediate belt air classifier, manual post-sorting can still be carried out in order to separate boards from pasted, heavy catalogs and the like.

Die so in der Zwischenband-Windsichtung aufbereitete, von den sehr schweren Materialien befreite Sammelware wird nun einem zweistufig geschalteten Zickzacksichter zugeführt. Das Material fällt über eine Zellradschleuse von oben in den Eingang 20 eines länglichen Behälters mit rechteckigem Querschnitt, der vertikal aufgestellt ist und in Längsrichtung eine Mehrzahl von zickzackförmigen Windungen hat und einen ersten Zickzacksichter 21 bildet. Der erste Zickzacksichter 21 wird von unten nach oben von einem starken Luftstrom durchströmt, in dem die Luftströmungsgeschwindigkeit beispielsweise 8 - 10 m/s betragen kann, wobei die Querschnittsfläche des Strömungskanals des ersten Zickzacksichters in diesem Beispiel 1,44 m2 beträgt. Die Sammelware muss somit entgegen diesem Luftstrom durch den zickzackförmigen Weg nach unten fallen, wobei ein erheblicher Teil der Zeitungen bereits aufblättert und dadurch durch seine vergrößerte effektive Oberfläche im Gegenstrom als leichteres Material erscheint. Leichtere Materialien wie aufgeklappte Zeitungen und Zeitschriften werden nach oben mitgerissen und aus einem oberen Ausgang 24 des ersten Zickzacksichters 21 abgesogen, und müssen nicht mehr nachsortiert werden. Die schwereren Pappen und noch zusammengefaltete Zeitungen fallen nach unten durch den ersten Zickzacksichter 21 und treten an dessen unteren Ausgang 22 aus.The collected in the intermediate belt air classification, freed from the very heavy materials collected goods is now fed to a two-stage zigzag sifter. The material falls from above via a rotary valve into the entrance 20 of an oblong container of rectangular cross section, which is vertically positioned and has a plurality of zigzag windings in the longitudinal direction and forms a first zigzag sifter 21. The first zigzag sifter 21 is traversed from bottom to top by a strong air flow, in which the air flow velocity For example, 8 - 10 m / s may be, wherein the cross-sectional area of the flow channel of the first zigzag sifter in this example is 1.44 m 2 . The collected goods must thus fall down against the flow of air through the zigzag path, with a significant portion of the newspapers already flaking and thereby appearing as a lighter material in countercurrent through its increased effective surface area. Lighter materials such as unfolded newspapers and magazines are entrained upward and sucked from an upper outlet 24 of the first zigzag sifter 21, and no longer need to be rearranged. The heavier boards and still folded newspapers fall down through the first zigzag sifter 21 and exit at its lower exit 22.

Diese aus dem unteren Ausgang 22 des ersten Zickzacksichters 21 austretende Ware wird nun nach dem gleichen Prinzip in einem zweiten Zickzacksichter 31 behandelt, indem sie zu dessen Eingang 30 transportiert wird. In diesem zweiten Zickzacksichter 31 wird ein noch stärkerer Luftstrom nach oben eingesetzt, dessen Strömungsgeschwindigkeit beispielsweise 10 - 14 m/s betragen kann. Die Querschnittsfläche des zweiten Zickzacksichters beträgt in diesem Beispiel 1 m2. In diesem zweiten Zickzacksichter 31 haben zusammengefaltete Zeitungen noch einmal Gelegenheit, sich beim Fallen durch den Zickzacksichter 31 im Gegenstrom zu entfalten. Das so im zweiten Zickzacksichter 31 nach oben geblasene leichtere Material wird an einem oberen Ausgang 34 des zweiten Zickzacksichters 31 abgesaugt und wieder zu dem ersten Zickzacksichter 21 zurück- und in dessen Eingang 20 eingeführt. Auf diese Weise durchläuft das Material den Kreislauf bis es schließlich entweder aus dem oberen Ausgang 24 des ersten Zickzacksichters 21 als Deinkingpapier abgesaugt wird oder durch den unteren Ausgang 32 des zweiten Zickzacksichters 31 fällt. Das aus dem oberen Ausgang 24 des ersten Zickzacksichter 21 abgeführte Material wird als Deinkingpapier gesammelt, während das aus dem unteren Ausgang 32 des zweiten Zickzacksichters 31 herausgefallene Material als Mischpapier abgeführt oder weiteren Sortierschritten unterzogen wird.This product emerging from the lower outlet 22 of the first zigzag sifter 21 is now treated according to the same principle in a second zigzag sifter 31 by being transported to its inlet 30. In this second zigzag sifter 31 an even stronger air flow is used upwards, the flow rate can be for example 10 - 14 m / s. The cross-sectional area of the second zigzag sifter is 1 m 2 in this example. In this second zigzag sifter 31 folded newspapers have once again opportunity to unfold when falling through the zigzag sifter 31 in countercurrent. The lighter material blown upwards in the second zigzag sifter 31 is sucked off at an upper outlet 34 of the second zigzag sifter 31 and returned to the first zigzag sifter 21 and introduced into its inlet 20. In this way, the material runs through the circuit until it is either sucked out of the upper output 24 of the first zigzag sifter 21 as Deinkingpapier or falls through the lower output 32 of the second zigzag sifter 31. The material discharged from the upper exit 24 of the first zigzag sifter 21 is collected as deinking paper, while the material dropped out of the lower exit 32 of the second zigzag sifter 31 is removed as mixed paper or subjected to further sorting steps.

In Figur 2 ist ein zu Verwendung mit dem Verfahren besonders geeigneter Zickzacksichter 21 gezeigt. Der oberen Eingang 20 dient zum Einführen der Sammelware. Die zu dem oberen Ausgang 24 führende Leitung zweigt in einigem Abstand unterhalb von dem oberen Eingang 20 aus dem Zickzacksichter 21 ab, damit schwerere Pappen nicht direkt in den Absaugluftstrom in den Ausgang 24 gelangen können. Im Gegensatz zu herkömmlichen Zickzacksichtern, die aus geraden, im Winkel zueinander stehenden Abschnitten bestehen und somit einen eckigen Strömungskanal bilden, weist der Zickzacksichter 21 eine Mehrzahl von bogenförmigen Abschnitten 25 auf, die zusammengesetzt sind, um einen schlangenförmigen Strömungskanal zu ergeben. Diese bogenförmige Gestaltung verhindert die Bildung von Materialnestern und unterstützt das vollständige Auseinanderblättern von Zeitungen.FIG. 2 shows a zigzag classifier 21 which is particularly suitable for use with the method. The upper input 20 is used to introduce the collected goods. The leading to the upper output line 24 branches off at some distance below the upper input 20 from the zigzag separator 21, so heavier cardboard can not get directly into the exhaust air flow into the output 24. In contrast to conventional zig-zag sifters, which consist of straight, angled sections and thus form a polygonal flow channel, the zigzag sifter 21 has a plurality of arcuate sections 25 which are assembled to provide a serpentine flow channel. This arcuate design prevents the formation of material nests and supports the complete flipping of newspapers.

Mit dem beschriebenen Verfahren lässt sich Deinkingpapier mit guter Reinheit, so dass nicht mehr manuell nachsortiert werden muss, und mit hoher Ausbeute aus der Altpapiersammelware gewinnen. With the method described deinking paper with good purity, so that no longer needs to be sorted manually, and win with high yield from the recovered paper collection.

Claims (8)

  1. Process for sorting collected waste paper goods for recovering deinking paper, in which
    the uncomminuted collected goods are subjected to coarse screening for separating off large cardboard pieces and to fine screening for separating off small impurities,
    the remaining collected goods are subjected, uncomminuted, to intermediate-belt air classification in crosscurrent and only the collected goods that have been blown out are subjected to the further steps and the heavier parts that have fallen through are discharged to separate further treatment,
    the collected goods blown out in the intermediate-belt air classification are introduced into the inlet (20) of a first zigzag classifier (21), through which air is blown in countercurrent, the air flow being adapted so that lighter paper goods are blown out of the zigzag classifier upwards out of an outlet (24), the paper blown out at the top being collected as deinking paper.
  2. Process according to Claim 1, in which the remaining collected goods exiting from the first zigzag classifier (21) at the bottom are introduced into the inlet (30) of a second zigzag classifier (31), out of which remaining lighter paper goods are blown upwards and transported in a circuit back to the inlet (20) of the first zigzag classifier (21), while the remaining collected goods are discharged from the bottom outlet (32) of the second zigzag classifier as mixed paper.
  3. Process according to Claim 2, in which the second zigzag classifier (31) is operated with an air countercurrent at a higher flow rate than the first zigzag classifier (21).
  4. Process according to Claim 3, in which the first zigzag classifier (21) is operated with a countercurrent at a flow rate of 8 to 10 m/s and the second zigzag classifier (31) is operated with a countercurrent at a flow rate of 10 to 15 m/s.
  5. Process according to one of the preceding claims, in which, during the coarse sorting, parts having a dimension of more than 0.5 m in one direction are trapped in a screening device (6) and discharged.
  6. Process according to one of the preceding claims, in which the fine screening is carried out by means of a screening drum (8).
  7. Apparatus for carrying out a process for sorting collected waste paper goods for recovering deinking paper according to one of the preceding claims, having
    a screening device (6) for coarse screening of the uncomminuted collected goods for separating off large paperboard pieces and a screening device (8) for fine screening for separating off small impurities,
    an intermediate-belt air classifier, which is constructed so as to subject the remaining collected goods, uncomminuted, to intermediate-belt air classification in crosscurrent,
    a first zigzag classifier (21), which is arranged so as to receive the collected goods blown out in the intermediate-belt air classification in its inlet (20), and which is set so that air is blown through the zigzag classifier (21) in countercurrent in such a way that lighter paper goods are blown out of the zigzag classifier upwards out of an outlet (24), and a collecting device for collecting this paper blown out at the top as deinking paper.
  8. Apparatus according to Claim 7, in which the zigzag classifiers (21, 31) are each composed of a plurality of curved sections (25) which form a helical flow channel.
EP03004352A 2002-03-04 2003-02-28 Process for sorting waste paper for recovering paper for de-inking Expired - Lifetime EP1342832B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10209525 2002-03-04
DE10209525A DE10209525C1 (en) 2002-03-04 2002-03-04 Process for sorting waste paper stock to obtain deinking paper and device for carrying out the process

Publications (3)

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EP1342832A2 EP1342832A2 (en) 2003-09-10
EP1342832A3 EP1342832A3 (en) 2005-09-07
EP1342832B1 true EP1342832B1 (en) 2007-03-28

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Application Number Title Priority Date Filing Date
EP03004352A Expired - Lifetime EP1342832B1 (en) 2002-03-04 2003-02-28 Process for sorting waste paper for recovering paper for de-inking

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EP (1) EP1342832B1 (en)
AT (1) ATE358209T1 (en)
DE (2) DE10209525C1 (en)
DK (1) DK1342832T3 (en)
ES (1) ES2284996T3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2020192B1 (en) 2017-12-28 2019-07-08 Didid Apparatus and method for separating sea shells from a beach garbage mixture

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1135841B (en) * 1960-06-09 1962-09-06 Dr Theodor Eder Method and device for separating granular material into at least two end fractions
DE2542571C3 (en) * 1975-09-22 1981-04-23 Budde, Bernhard, Dipl.-Ing., 1000 Berlin Method and device for sorting waste paper
DE29722242U1 (en) * 1997-12-01 1998-07-23 Trienekens GmbH, 41747 Viersen Improved device for sorting packaging waste
DE19957707A1 (en) * 1999-11-12 2001-05-31 U T G Ges Fuer Umwelttechnik G Deinkingware
DE10010354C2 (en) * 2000-03-07 2003-02-06 Bueckmann Gmbh Tech Gewebe Und Method and device for controlling the whiteness of a bulk material from shredded paper fractions
DE10014872C2 (en) * 2000-03-24 2002-01-31 Isis Gmbh Servicegesellschaft Method and device for processing a paper mixture

Also Published As

Publication number Publication date
ATE358209T1 (en) 2007-04-15
DE10209525C1 (en) 2003-12-18
EP1342832A2 (en) 2003-09-10
DK1342832T3 (en) 2007-07-23
DE50306885D1 (en) 2007-05-10
EP1342832A3 (en) 2005-09-07
ES2284996T3 (en) 2007-11-16

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