WO1994020669A1 - Method and device dor the digestion of recycled paper - Google Patents

Method and device dor the digestion of recycled paper Download PDF

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Publication number
WO1994020669A1
WO1994020669A1 PCT/EP1994/000617 EP9400617W WO9420669A1 WO 1994020669 A1 WO1994020669 A1 WO 1994020669A1 EP 9400617 W EP9400617 W EP 9400617W WO 9420669 A1 WO9420669 A1 WO 9420669A1
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WO
WIPO (PCT)
Prior art keywords
drum
waste paper
opening
dissolving
steam
Prior art date
Application number
PCT/EP1994/000617
Other languages
German (de)
French (fr)
Inventor
Walter Musselmann
Original Assignee
J.M. Voith Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by J.M. Voith Gmbh filed Critical J.M. Voith Gmbh
Priority to BR9404875A priority Critical patent/BR9404875A/en
Priority to KR1019940703918A priority patent/KR950701401A/en
Priority to JP6519565A priority patent/JPH07506641A/en
Priority to EP94909913A priority patent/EP0639238A1/en
Publication of WO1994020669A1 publication Critical patent/WO1994020669A1/en
Priority to FI945210A priority patent/FI945210A/en

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/32—Defibrating by other means of waste paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/34—Kneading or mixing; Pulpers
    • D21B1/345—Pulpers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/02—Working-up waste paper
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Definitions

  • the invention relates to a method for dissolving waste paper and corresponding devices for carrying out the method.
  • the object of the invention is to make the sequence of the method operationally reliable and in a simple manner inexpensive or cost-saving, in particular with regard to the continuation of the waste paper, the sorting thereof, etc.
  • the pulper 1 is essentially designed as a spherical container with a lid 4 and a filling funnel 26. He also points to his Bottom of a rotor 2 with helical circulating ribs 3 and 3 '. The rotor rotates on a base plate 5. The rotor is driven via its shaft 10 by a motor, not shown here. The dissolved substance is drawn off via line 19 after valve 28 is opened.
  • the flap 4 is actuated by the piston rod 16 of a hydraulic lifting element 15 which is articulated on the support 18.
  • the lid 4 is mounted on the container 1 via a pivot joint 17.
  • High-tension steam or compressed gas can be added through nozzle 14 and water can be added through nozzle 21.
  • Another addition line for chemicals is indicated at 26.
  • the waste paper is fed in via a conveyor belt 29.
  • the lid 4 is closed and compressed gas or high-pressure steam is added via line 14, which has a pressure between 1.2 and 5 bar and a temperature between 60 and Can have 150 °. Accordingly, the pressure values also apply to supplied compressed gas. Compressed air usually available in the factory can be used as compressed gas. In the case of consistencies, you can preferably resolve between 8 and 16%.
  • valve 28 is opened and the dissolved waste paper leaves the container 1 via line 19.
  • the rotor 2 rotates.
  • the waste paper arrives at high speed from the blow line 20 into the rotatable drum 30 with a horizontal axis of rotation, which, however, can also be inclined at most 15 ° to the horizontal.
  • This drum is completely closed on the side opposite the blowing line by an end wall 34.
  • a stub shaft 43 is provided, by means of which the drum is mounted in a support 47 via a bearing 46.
  • the drum is driven by a motor 44 via a pinion 47 of a gear 45, which is on a ring gear 40 works.
  • the drum is rotatably supported on bearing rings 36 and 37 by means of rollers 38 and 39, the support of which is not shown here because it is known.
  • the front end of the drum has an end wall 32 with a central opening 31, which serves both for the introduction of the blow line 20 and the discharge opening - at least as far as its lower part is concerned - for the dirt components.
  • discharge blades 33 are provided for ejecting these parts.
  • a spray tube 48 for dilution water also protrudes through the opening 31 into the drum.
  • the drum can or must be made quite large to accommodate the content of the pulper and can be between 5 and 10 m in length and between 1.50 and 5 m in diameter.
  • the perforated screen of the drum can have a diameter between 6 and 20 mm.
  • the dissolved waste paper mass is blown in in a short time, approximately between 10 and 20 seconds, after which
  • Dilution water is introduced into the drum.
  • ribs 51 In order to circulate the suspension in the drum, there are essentially axially extending ribs 51 and possibly additional conveyor walls 52.
  • the conveying walls 52 in the form of helices or other similar conveying devices convey the waste paper to the closed end 34, this is prevented during the dilution process to a consistency between 3 and 5% too much usable waste paper mass emerges through the opening 31.
  • waste paper suspension comes down through the perforated screen as a good substance and is collected in a tub (not shown here).
  • the direction of rotation of the drum can be reversed so that during the now strongly starting sorting process with the now low consistency, the pollution components to the opening 31 are conveyed to a large extent.
  • This procedure may have the advantage that dispersion (high-density fiberization under excess pressure) no longer has to take place later for the waste paper suspension, i.e. Glue, hotmelts, wax or the like are finely dispersed without a
  • Dispersing device must still be used. Another great advantage is that the sorting drum may replace the previous first hole sorting stage in stock preparation.
  • the speed of the drum can be set at around 10-20 rpm.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Processing Of Solid Wastes (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)

Abstract

The invention concerns a method of digesting recycled paper at a concentration between 8 and 15 % in a closed container, supplying gas or steam at an overpressure between 0.2 and 4 bar and at temperatures between 90 and 150 °C and subsequently diluting to a concentration between 3 and 5 % and separating the usable material from the unusable by mixing in a rotating perforated-sheet drum - preferably with a horizontal axis - into one end of which the digested recycled-paper suspension is blown.

Description

Verfahren und Einrichtung zum Auflösen von Altpapier Process and device for dissolving waste paper
Die Erfindung betrifft ein Verfahren zum Auflösen von Altpapier sowie entsprechende Einrichtungen zur Durchführung des Verfahrens.The invention relates to a method for dissolving waste paper and corresponding devices for carrying out the method.
In der nichtvorveröffentlichten DE-A 42 41 039 ist ein Verfahren zum Auflösen von Altpapier beschrieben, bei welchem unter hohem Druck und hoher Temperatur das Altpapier in einem Stofflösebehälter zerlegt wird. Das aufgelöste Altpapier soll dann in eine Bütte abgeblasen werden. Es werden vorzugsweise Chemikalien für den Auflösevorgang eingesetzt, so daß die Auflösearbeit in günstiger Weise verhältnismäßig gering ist.In the unpublished DE-A 42 41 039 a method for dissolving waste paper is described, in which the waste paper is disassembled in a fabric dissolving container under high pressure and high temperature. The dissolved waste paper should then be blown off into a chest. Chemicals are preferably used for the dissolving process, so that the dissolving work is relatively low in a favorable manner.
Die Aufgabe der Erfindung ist es, den Ablauf des Verfahrens insbesondere hinsichtlich der Weiterführung des Altpapiers, der Sortierung desselben usw. betriebssicher und in einfacher Weise günstig bzw. kostensparend zu gestalten.The object of the invention is to make the sequence of the method operationally reliable and in a simple manner inexpensive or cost-saving, in particular with regard to the continuation of the waste paper, the sorting thereof, etc.
Durch das Ausblasen in eine Trommel vermeidet man den schwerwiegenden Nachteil, daß sich in einem Blastank am Boden desselben ansammelnde schwere und großflächige Verschmutzungen sowie Gespinste hier keine Probleme schaffen können. Aus der rotierenden Trommel gelangt derBy blowing out into a drum one avoids the serious disadvantage that heavy and large-scale dirt and webs accumulating in a blow tank at the bottom of the same cannot create any problems here. The comes out of the rotating drum
Gutstoff durch die Perforation der Sieblochung einwandfrei heraus, während durch die stirnseitige Austragsöffnung die groben Verschmutzungen auch schwerer Art die Trommel verlassen. Dies erfolgt vorzugsweise während der Neubeschickung und des neuen Auflösezyklus in dem Stofflösebehälter.Acceptable material flawlessly removed through the perforation of the screen perforation, while the coarse soiling, even of a heavy type, leaves the drum through the discharge opening on the front. This is preferably done during the re-loading and the new dissolving cycle in the pulping tank.
Nachfolgend wird die Erfindung anhand des in der Figur prinzipmäßigen dargestellten Ausführungsbeispiels erläutert. Der Stofflöser 1 ist im wesentlichen hier als kugelförmiger Behälter mit einem Deckel 4 und einem Einfülltrichter 26 ausgeführt. Er weist ferner an seinem Boden einen Rotor 2 mit wendelförmigen Umwälzrippen 3 und 3' auf. Der Rotor rotiert auf einer Grundplatte 5. Der Antrieb des Rotors erfolgt über seine Welle 10 von einem hier nicht dargestellten Motor. Der Abzug des aufgelösten Stoffes erfolgt über Leitung 19 nach Öffnen des Ventils 28.The invention is explained below on the basis of the exemplary embodiment shown in principle in the figure. The pulper 1 is essentially designed as a spherical container with a lid 4 and a filling funnel 26. He also points to his Bottom of a rotor 2 with helical circulating ribs 3 and 3 '. The rotor rotates on a base plate 5. The rotor is driven via its shaft 10 by a motor, not shown here. The dissolved substance is drawn off via line 19 after valve 28 is opened.
Die Klappe 4 wird durch die Kolbenstange 16 eines hydraulischen Hubelementes 15 betätigt, das gelenkig an dem Auflager 18 gelagert ist. Der Deckel 4 ist über Drehgelenk 17 an dem Behälter 1 gelagert. Durch Stutzen 14 kann hochgespannter Dampf oder Druckgas und durch Stutzen 21 Wasser zugegeben werden. Eine weitere Zugabeleitung für Chemikalien ist bei 26 angedeutet. Die Zufuhr des Altpapiers erfolgt über ein Förderband 29. Sobald genügend Altpapier im Behälter 1 vorhanden ist, wird der Deckel 4 geschlossen und über Leitung 14 Druckgas oder hochgespannter Dampf zugegeben, welcher einen Druck zwischen 1,2 und 5 bar und eine Temperatur zwischen 60 und 150° aufweisen kann. Die Druckwerte gelten dementsprechend auch für zugeführtes Druckgas. Als Druckgas kommt die gewöhnlich im Werk vorhandene Druckluft in Frage. Man kann bei Konsistenzen vorzugsweise zwischen 8 und 16 % auflösen. Wenn der Auflösevorgang weit genug erfolgt ist, wird Ventil 28 geöffnet, und das aufgelöste Altpapier verläßt über Leitung 19 den Behälter 1. Dabei rotiert der Rotor 2.The flap 4 is actuated by the piston rod 16 of a hydraulic lifting element 15 which is articulated on the support 18. The lid 4 is mounted on the container 1 via a pivot joint 17. High-tension steam or compressed gas can be added through nozzle 14 and water can be added through nozzle 21. Another addition line for chemicals is indicated at 26. The waste paper is fed in via a conveyor belt 29. As soon as there is enough waste paper in the container 1, the lid 4 is closed and compressed gas or high-pressure steam is added via line 14, which has a pressure between 1.2 and 5 bar and a temperature between 60 and Can have 150 °. Accordingly, the pressure values also apply to supplied compressed gas. Compressed air usually available in the factory can be used as compressed gas. In the case of consistencies, you can preferably resolve between 8 and 16%. When the dissolution process has been carried out far enough, valve 28 is opened and the dissolved waste paper leaves the container 1 via line 19. The rotor 2 rotates.
Aus der Blasleitung 20 gelangt das Altpapier mit hoher Geschwindigkeit in die rotierbare Trommel 30 mit horizontaler Drehachse, die auch allerdings höchstens 15° gegen die Horizontale geneigt sein kann. Diese Trommel ist an der der Blasleitung gegenüberliegenden Seite durch eine Stirnwand 34 völlig verschlossen. Es ist dort ein Wellenstumpf 43 vorgesehen, mittels welchem die Trommel über ein Lager 46 in einer Abstützung 47 gelagert ist. Der Antrieb der Trommel erfolgt mittels einem Motor 44 über ein Ritzel 47 eines Getriebes 45, das auf einen Zahnkranz 40 wirkt. Die drehbare Lagerung der Trommel erfolgt an Lagerringen 36 und 37 mittels Rollen 38 und 39, deren Abstützung hier nicht dargestellt ist, weil diese bekannt ist.The waste paper arrives at high speed from the blow line 20 into the rotatable drum 30 with a horizontal axis of rotation, which, however, can also be inclined at most 15 ° to the horizontal. This drum is completely closed on the side opposite the blowing line by an end wall 34. There, a stub shaft 43 is provided, by means of which the drum is mounted in a support 47 via a bearing 46. The drum is driven by a motor 44 via a pinion 47 of a gear 45, which is on a ring gear 40 works. The drum is rotatably supported on bearing rings 36 and 37 by means of rollers 38 and 39, the support of which is not shown here because it is known.
Die vordere Stirnseite der Trommel hat eine Endwand 32 mit einer Mittelöffnung 31, die sowohl zum Einführen der Blasleitung 20 dient als auch die Austragsöffnung - jedenfalls soweit es ihren unteren Teil betrifft - für die Verschmutzungsbestandteile darstellt. In diesem Bereich sind Austragsschaufeln 33 zum Auswurf dieser Teile vorgesehen. Es ragt noch durch die Öffnung 31 ein Spritzrohr 48 für Verdünnungswasser in die Trommel hinein. Die Trommel kann oder muß recht groß ausgeführt werden, um den Inhalt des Stofflösers aufzunehmen und kann eine Länge zwischen 5 und 10 m und einen Durchmesser zwischen 1,50 und 5 m haben. Die Sieblochung der Trommel kann einen Durchmesser zwischen 6 und 20 mm aufweisen. Das Einblasen der aufgelösten Altpapiermasse erfolgt in einer geringen Zeit etwa zwischen 10 und 20 Sekunden, woraufThe front end of the drum has an end wall 32 with a central opening 31, which serves both for the introduction of the blow line 20 and the discharge opening - at least as far as its lower part is concerned - for the dirt components. In this area discharge blades 33 are provided for ejecting these parts. A spray tube 48 for dilution water also protrudes through the opening 31 into the drum. The drum can or must be made quite large to accommodate the content of the pulper and can be between 5 and 10 m in length and between 1.50 and 5 m in diameter. The perforated screen of the drum can have a diameter between 6 and 20 mm. The dissolved waste paper mass is blown in in a short time, approximately between 10 and 20 seconds, after which
Verdünnungswasser in die Trommel eingeleitet wird. Zum Umwälzen der Suspension in der Trommel hat man im wesentlichen axial verlaufende Rippen 51, sowie eventuell zusätzliche Förderwände 52.Dilution water is introduced into the drum. In order to circulate the suspension in the drum, there are essentially axially extending ribs 51 and possibly additional conveyor walls 52.
Betreibt man die Trommel nach Füllen derselben in der ersten Zeit, wofür etwa 3 - 5 Minuten angesetzt werden können, in einer Drehrichtung, wobei die Förderwände 52 in Form von Wendeln oder sonstige ähnliche Fördereinrichtungen das Altpapier zum geschlossenen Ende 34 befördern, wird verhindert, daß während des Verdünnungsvorganges auf eine Konsistenz zwischen 3 und 5 % zu viel brauchbare Altpapiermasse durch die Öffnung 31 austritt. Schon während dieser Zeit tritt Altpapiersuspension als Gutstoff durch die Siebperforation nach unten und wird in einer hier nicht dargestellten Wanne aufgefangen. Nach der angegebenen Zeit kann die Drehrichtung der Trommel umgedreht werden, so daß während des nun stark einsetzenden Sortiervorganges bei der nunmehr eingestellten, geringen Konsistenz die Förderung der Verschmutzungsbestandteile zur Öffnung 31 in starkem Maße erfolgt.If the drum is operated in the direction of rotation after it has been filled for the first time, which can take about 3-5 minutes, the conveying walls 52 in the form of helices or other similar conveying devices convey the waste paper to the closed end 34, this is prevented during the dilution process to a consistency between 3 and 5% too much usable waste paper mass emerges through the opening 31. Already during this time, waste paper suspension comes down through the perforated screen as a good substance and is collected in a tub (not shown here). After the specified time, the direction of rotation of the drum can be reversed so that during the now strongly starting sorting process with the now low consistency, the pollution components to the opening 31 are conveyed to a large extent.
Man hat bei dieser Verfahrensweise unter Umständen den Vorteil, daß eine Dispergierung (Hochstoffdichtezerfaserung unter Überdruck) später für die Altpapiersuspension nicht mehr erfolgen muß, d.h. Kleber, Hotmelts, Wachs oder ähnliches werden fein dispergiert, ohne daß einThis procedure may have the advantage that dispersion (high-density fiberization under excess pressure) no longer has to take place later for the waste paper suspension, i.e. Glue, hotmelts, wax or the like are finely dispersed without a
Dispergiergerät eigens noch eingesetzt werden muß. Ein weiterer großer Vorteil besteht darin, daß unter Umständen die Sortiertrommel die bisherige erste Lochsortierstufe in der Stoffaufbereitung ersetzt. Die Drehzahl der Trommel kann etwa mit 10 - 20 U/min vorgesehen werden. Dispersing device must still be used. Another great advantage is that the sorting drum may replace the previous first hole sorting stage in stock preparation. The speed of the drum can be set at around 10-20 rpm.

Claims

Ansprüche Expectations
1. Verfahren zum Auflösen von Altpapier bei einer Konsistenz zwischen 8 und 15 % in einem geschlossenen1. Process for dissolving waste paper with a consistency between 8 and 15% in a closed
Stofflösebehälter unter Zugabe von Gas oder Dampf bei einem Überdruck zwischen 0,Dissolving container with the addition of gas or steam at an overpressure between 0.
2 und 4 bar und Temperaturen zwischen 90 und 150"C mit anschließendem Verdünnen auf eine Konsistenz zwischen 3 und 5 % und Sortieren unter Umwälzen in einer rotierbaren, mit perforiertem Mantel versehenen Trommel - mit vorzugsweise horizontaler Achse - in welche die aufgelöste Altpapiersuspension an einer Stirnseite derselben hineingeblasen wird.2 and 4 bar and temperatures between 90 and 150 "C with subsequent dilution to a consistency between 3 and 5% and sorting with circulation in a rotatable drum with a perforated jacket - preferably with a horizontal axis - into which the dissolved paper suspension is placed on one end the same is blown into it.
Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Sortierung in der Trommel bei Lochdurchmessern der Siebperforierung zwischen 6 und 20 mm, vorzugsweise zwischen 6 und 8 mm erfolgt.A method according to claim 1, characterized in that the sorting in the drum takes place with perforation diameters of the screen perforation between 6 and 20 mm, preferably between 6 and 8 mm.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß mittels einem reversierbaren Trommelantrieb und einem Vorschub bewirkenden leisten- oder rippenartigen Einbauten in der Trommel zunächst für 3 bis 5 Minuten eine Förderung der3. The method according to claim 1 or 2, characterized in that by means of a reversible drum drive and a feed-causing strip-like or rib-like internals in the drum first for a promotion of 3 to 5 minutes
Altpapiersuspension zum geschlossenen, von der stirnseitigen Eintragsöffnung der Trommel entfernten Ende der Trommel und für die Restzeit bis maximal 30 Minuten bei umgekehrter Drehrichtung mit entgegengesetzter axialer Förderrichtung in derWaste paper suspension to the closed end of the drum, which is distant from the front entry opening of the drum, and for the remaining time up to a maximum of 30 minutes in the opposite direction of rotation with opposite axial conveying direction in the
Trommel zu ihrem Eintragsende hin der Austrag der schweren und großflächigen Verschmutzungen und sonstiger großflächiger Bestandteile erfolgt.The heavy and large-scale dirt and other large-scale components are removed at the end of their entry.
4. Einrichtung zur Durchführung des Verfahrens, dadurch gekennzeichnet, daß der Stofflöserbehälter (1) eine mittels dampfdichtem Deckel (4) abschließbare Zuführöffnung für das Altpapier hat und am Boden oder in Bodennähe einen Auflöserotor (2) aufweist, wobei mindestens eine Dampf- oder Gaszufuhrleitung (21) an den Stofflösebehälter (1) angeschlossen ist.4. Device for performing the method, characterized in that the pulp dissolver (1) is lockable by means of a vapor-tight lid (4) Has feed opening for the waste paper and has a dissolving rotor (2) at the bottom or near the bottom, at least one steam or gas feed line (21) being connected to the pulp dissolving container (1).
5. Einrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die von der Austragsöffnung des Stofflösers abführende Blasleitung (20) mindestens 50 cm in die zentrale (stirnseitige) Einlaßöffnung (31) der rotierbaren Trommel (30) eingeführt ist.5. Device according to claim 4, characterized in that the discharge line from the discharge opening of the pulper (20) is inserted at least 50 cm into the central (end) inlet opening (31) of the rotatable drum (30).
6. Einrichtung nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, daß die rotierbare Trommel (30) als Auslaßöffnung einen Teil der stirnseitigen Einlaßöffnung für die Blasleitung (20) hat, die von einer stirnseitigen Endwand (32) umgeben ist, in deren Bereich Förderschaufeln (33) zum Auswurf der Verunreinigungen angeordnet sind. 6. Device according to one of claims 4 or 5, characterized in that the rotatable drum (30) as an outlet opening has a part of the front inlet opening for the blow line (20), which is surrounded by an end wall (32) in the region thereof Conveyor blades (33) are arranged to eject the contaminants.
PCT/EP1994/000617 1993-03-05 1994-03-03 Method and device dor the digestion of recycled paper WO1994020669A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BR9404875A BR9404875A (en) 1993-03-05 1994-03-03 Process and installation for disassembling old paper
KR1019940703918A KR950701401A (en) 1993-03-05 1994-03-03 METHOD AND DEVICE FOR DIGESTION OF RECYCLED PAPER
JP6519565A JPH07506641A (en) 1993-03-05 1994-03-03 Waste paper decomposition method and device
EP94909913A EP0639238A1 (en) 1993-03-05 1994-03-03 Method and device for disintegrating recycled paper
FI945210A FI945210A (en) 1993-03-05 1994-11-04 Method and apparatus for breaking up recovered paper

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934306936 DE4306936A1 (en) 1993-03-05 1993-03-05 Waste paper processing - using container to breakdown material by heat and pressure followed by dilution and sorting in rotating drum with perforated mantle
DEP4306936.3 1993-03-05

Publications (1)

Publication Number Publication Date
WO1994020669A1 true WO1994020669A1 (en) 1994-09-15

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PCT/EP1994/000617 WO1994020669A1 (en) 1993-03-05 1994-03-03 Method and device dor the digestion of recycled paper

Country Status (8)

Country Link
EP (1) EP0639238A1 (en)
JP (1) JPH07506641A (en)
KR (1) KR950701401A (en)
BR (1) BR9404875A (en)
CA (1) CA2135164A1 (en)
DE (1) DE4306936A1 (en)
FI (1) FI945210A (en)
WO (1) WO1994020669A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4306936A1 (en) * 1993-03-05 1993-09-23 Voith Gmbh J M Waste paper processing - using container to breakdown material by heat and pressure followed by dilution and sorting in rotating drum with perforated mantle
CA2960310C (en) * 2014-10-06 2023-04-11 Georgia-Pacific Containerboard Llc Integrated method and system for recycling waste material
WO2023170496A2 (en) * 2022-03-08 2023-09-14 Juno Llc System and method for recycling waste material having improved washing

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1000676B (en) * 1952-12-08 1957-01-10 Papiermaschinenwerke Veb Device for dissolving or dismantling fiber material
CH358671A (en) * 1957-06-25 1961-11-30 Voith Gmbh J M Dissolver, especially for materials that are difficult to fiber
DE3127114A1 (en) * 1980-07-10 1982-04-08 J.M. Voith Gmbh, 7920 Heidenheim Apparatus for breaking open old paper and for sorting out fibres to be obtained from this for the production of paper, cardboard or paper board
DE3225538C1 (en) * 1982-07-08 1983-12-22 J.M. Voith Gmbh, 7920 Heidenheim Buffer vessel for waste paper reprocessing
DE4306936A1 (en) * 1993-03-05 1993-09-23 Voith Gmbh J M Waste paper processing - using container to breakdown material by heat and pressure followed by dilution and sorting in rotating drum with perforated mantle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1000676B (en) * 1952-12-08 1957-01-10 Papiermaschinenwerke Veb Device for dissolving or dismantling fiber material
CH358671A (en) * 1957-06-25 1961-11-30 Voith Gmbh J M Dissolver, especially for materials that are difficult to fiber
DE3127114A1 (en) * 1980-07-10 1982-04-08 J.M. Voith Gmbh, 7920 Heidenheim Apparatus for breaking open old paper and for sorting out fibres to be obtained from this for the production of paper, cardboard or paper board
DE3225538C1 (en) * 1982-07-08 1983-12-22 J.M. Voith Gmbh, 7920 Heidenheim Buffer vessel for waste paper reprocessing
DE4306936A1 (en) * 1993-03-05 1993-09-23 Voith Gmbh J M Waste paper processing - using container to breakdown material by heat and pressure followed by dilution and sorting in rotating drum with perforated mantle

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EP0639238A1 (en) 1995-02-22
DE4306936A1 (en) 1993-09-23
FI945210A0 (en) 1994-11-04
CA2135164A1 (en) 1994-09-15
KR950701401A (en) 1995-03-23
FI945210A (en) 1994-11-04
JPH07506641A (en) 1995-07-20
BR9404875A (en) 1999-06-15

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