EP1398127B1 - Process for cleaning a mixer for the dry-glueing of cellulosic fibers - Google Patents

Process for cleaning a mixer for the dry-glueing of cellulosic fibers Download PDF

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Publication number
EP1398127B1
EP1398127B1 EP02020641A EP02020641A EP1398127B1 EP 1398127 B1 EP1398127 B1 EP 1398127B1 EP 02020641 A EP02020641 A EP 02020641A EP 02020641 A EP02020641 A EP 02020641A EP 1398127 B1 EP1398127 B1 EP 1398127B1
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Prior art keywords
small
wooden material
dry
cleaning
board
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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EP02020641A
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German (de)
French (fr)
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EP1398127A1 (en
Inventor
Michael Himmelreich
Walter Schiegl
Michael Steinwender
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Fritz Egger GmbH and Co OG
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Fritz Egger GmbH and Co OG
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Application filed by Fritz Egger GmbH and Co OG filed Critical Fritz Egger GmbH and Co OG
Priority to AT02020641T priority Critical patent/ATE310619T1/en
Priority to ES02020641T priority patent/ES2252370T3/en
Priority to EP02020641A priority patent/EP1398127B1/en
Priority to DE50205037T priority patent/DE50205037D1/en
Priority to PL362169A priority patent/PL197864B1/en
Publication of EP1398127A1 publication Critical patent/EP1398127A1/en
Application granted granted Critical
Publication of EP1398127B1 publication Critical patent/EP1398127B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

The method of cleaning a dry gluing machine for cellulose fibres involves applying a small mix of wood pieces on the fibres in the soiled areas of the inner gluing machine walls, to remove them. The small wooden pieces will be separated from the airlfow stream by a cyclone separator. The wooden pieces can be comminuted pieces or, sawdust.

Description

Die Erfindung betrifft ein Verfahren zum Reinigen einer Anlage zur Trockenbeleimung von zellulosen Fasern, wobei die Anlage eine Trockenbeleimungsstrecke und einen Abscheiderzyklon zum Abscheiden der zellulosen Fasern aus dem Transportluftstrom aufweist.The invention relates to a method for cleaning a Plant for the dry gluing of cellulosic fibers, wherein the plant a dry gluing line and a Separator cyclone for separating the cellulosic fibers having the transport air flow.

Verfahren zur Trockenbeleimung von faserartigem Material sind dem Fachmann aus verschiedenem Schriftum bekannt. Allen diesen Verfahren ist gemein, dass aus zellulosem Material wie beispielsweise Holzhackgut zuvor Fasern durch Einwirkung von Temperatur und Druck in einer Sattdampfatmosphäre ein Aufschluss des zellulosen Materials erfolgt. Diesen Vorgang nennt man Kochen. Anschließend gelangt das so vorbehandelte zellulose Material in den Refiner, in welchem durch aneinander vorbeilaufende Mahlscheiben mit geringem Abstand Fasern gewonnen werden. In der Blasleitung - auch blow-line genannt - werden Additive und insbesondere Leim zugegeben und dann unmittelbar danach getrocknet. Diese Art der Beleimung ist die konventionelle blow-line Bleimungstechnologie.Method for dry gluing fibrous material are known in the art from various writings. All these procedures are common, that of cellulosic Material such as wood chippings previously fibers through Influence of temperature and pressure in one Saturated steam atmosphere a disruption of the cellulosic material he follows. This process is called cooking. Subsequently enters the pretreated cellulose material in the Refiner, in which by passing each other Grinding discs with a small distance fibers are obtained. In the blow pipe - also called blow-line - be Added additives and especially glue and then dried immediately afterwards. This type of gluing is the conventional blow-line lead generation technology.

In den vergangenen Jahren wurden wie bereits erwähnt Alternativen zur blow-line Beleimung entwickelt und es zeigt sich nahezu unabhängig vom Verfahren, dass durch eine kombinierte Beleimung bestehend aus blow-line Beleimung und Trockenbeleimung Bindemittel im Ausmaß von ca. 30% bezogen auf eine ausschließliche blow-line Beleimung eingespart werden kann, ohne dass die finalen Produkteigenschaften dadurch negativ beeinflusst werden.In previous years, as already mentioned Alternatives to the blow-line gluing developed and it shows up almost independently of the procedure that by a combined gluing consisting of blow-line gluing and Dry gluing binder in the amount of about 30% saved on an exclusive blow-line gluing can be without the final product features be negatively influenced.

Auf unterschiedliche Trockenbeleimungsverfahren soll hier nicht eingegangen werden - diese sind beispielsweise in den Schriften WO 02/43934 A1, DE 101 04 047 A1, WO 02/04183 A1 oder DE 197 40 676 A1 beschrieben.On different Trockenbeleimungsverfahren should here not be entered - these are for example in the Documents WO 02/43934 A1, DE 101 04 047 A1, WO 02/04183 A1 or DE 197 40 676 A1.

Allen Verfahren gemeinsam ist, dass das bereits getrocknete Fasermaterial mit einem Leimnebel vermischt wird, wodurch sich der Leim auf dem Fasermaterial niederschlägt und darauf haften bleibt. Problematisch dabei allerdings ist, dass sich an Anlagenteilen, die sich nach der Einbringzone des Leims in die Anlage befinden, Verschmutzungen bilden, die keinen störungsfreien Betrieb der Anlage ermöglichen. Zum einen können sich diese Verschmutzungen während des Anlagenbetriebs lösen und sich mit den Fasern vermischen, wodurch sich bei der finalen Platte Störungen im Erscheinungsbild ergeben. Zum anderen können in Abhängigkeit von der Mächtigkeit der Verschmutzungen Störungen im aerodynamischen Verhalten der Trockenbeleimungsanlage ergeben. Damit verbunden sind Ungleichheiten in der Faserbeleimung, die zu Nachteilen bei den finalen Produkteigenschaften führen wie z.B. Leimflecken durch überbeleimte Faseragglomerate oder Verminderung der Festigkeitseigenschaften.Common to all processes is that the already dried Fiber material is mixed with a glue mist, thereby the glue settles on the fiber material and stick to it. The problem is, however, that at plant parts, which are after the introduction zone the glue is in the system, causing dirt, which do not allow trouble-free operation of the system. On the one hand, these contaminations can occur during the Solve system operation and mix with the fibers, which causes interference in the final disc Appearance. On the other hand, in Dependence on the thickness of the dirt Disturbances in the aerodynamic behavior of the Dry gluing plant result. Associated with it Inequalities in fiber sizing, which leads to disadvantages the final product properties such as e.g. Leimflecken by overglued fiber agglomerates or Reduction of the strength properties.

Der Erfindung liegt daher das technische Problem zugrunde, solche Anbackungen sehr einfach und dennoch wirkungsvoll zu beseitigen. The invention is therefore based on the technical problem Such caking very simple and effective too remove.

Das zuvor aufgezeigte technische Problem wird erfindungsgemäß durch ein Verfahren mit den Merkmalen des Anspruches 1 gelöst. Weitere vorteilhafte Ausgestaltungen des Verfahrens sind in den abhängigen Unteransprüchen angegeben.The above-mentioned technical problem is According to the invention by a method with the features of Claim 1 solved. Further advantageous embodiments of the method are in the dependent subclaims specified.

Erfindungsgemäß ist erkannt worden, dass allein dadurch, dass die Partikelgröße gegenüber der Partikelgröße der Fasern vergrößert zu werden braucht, um einen ausreichenden Reinigungseffekt zu erzielen. Denn die erhöhte Masse und Größe der Partikel des kleinstückigen Holzmaterials sind dafür maßgeblich, dass die Oberflächen zumindest teilweise von ihren Anbackungen befreit werden.According to the invention, it has been recognized that solely by that the particle size compared to the particle size of Fibers needs to be enlarged to a sufficient extent To achieve a cleaning effect. Because the increased mass and Size of the particles of small-sized wood material are relevant to the fact that the surfaces at least partially be released from their caking.

Im folgenden wird die Erfindung anhand eines Ausführungsbeispiels einer Anlage und eines konkreten Beispiels näher erläutert.In the following the invention is based on a Embodiment of a plant and a concrete Example explained in more detail.

Die einzige Figur zeigt schematisch als Blockdiagramm das Verfahren für die Herstellung von mitteldichten Faserplatten (MDF), wobei eine Anwendung prinzipiell für jedes Verfahren zur Trockenbeleimung unabhängig von der apparativen Ausführung möglich ist.The single figure shows schematically as a block diagram that Process for the preparation of medium density Fiberboard (MDF), where an application in principle for any method of dry gluing regardless of the apparatus design is possible.

Beim üblichen Betrieb der Trockenbeleimungsanlage gelangen Fasern aus einer Fasertrocknung zur Trockenbeleimungsanlage, in der Leim in der Regel als mittels Düsen erzeugter feiner Leimnebel eingebracht wird. Im Anschluss daran gelangen die beleimten Fasern zur Abscheidung vom Transportluftstrom in einen Abscheiderzyklon und die beleimten Fasern werden zur Weiterverarbeitung abtransportiert. During normal operation of the dry gluing plant Fibers from a fiber drying to Dry gluing plant, in the glue usually as introduced by means of nozzles fine glue mist is introduced. Subsequently, the glued fibers come to Separation of the transport air flow in one Separator cyclone and glued fibers become Further processing removed.

Für den erfindungsgemäßen Reinigungsbetrieb wird der Anlage nun anstelle der Fasern vom Trockner kleinstückiges Holz wie z.B. Hackgut zugeführt. Es ist selbstverständlich, dass dafür die Leimzuführung abgestellt ist. Das Hackgut wird ebenfalls vom Zyklon abgeschieden und aus der Anlage ausgeschleust. Das kleinstückige Holz reißt an den Innenwandungen befindliche Verschmutzungen mit und säubert dadurch innerhalb kurzer Zeit die Anlage.For the cleaning operation according to the invention of the plant now instead of the fibers from the dryer small pieces of wood such as. Supplied wood chips. It goes without saying that for the glue supply is turned off. The wood chips will also separated from the cyclone and out of the plant discharged. The small piece of wood tears at the Internal walls containing dirt and cleans thereby within a short time the plant.

Anstelle von Hackgut kann jedes andere kleinstückige Holzmaterial verwendet werden wie z.B. Späne aus der Fertigung von Spanplatten, Sägemehl aus der Sägeindustrie, granulierte Spanplatten oder MDF-Platten, ausgeschiedenes Feingut aus der Fertigung von oriented strand board (OSB). Diese Materialien sind in der Holzwerkstoffindustrie ausreichend vorhanden, daher gut verfügbar und zeichnen sich durch geringe Kosten aus. Wesentlich ist, dass das Material holzähnliche Eigenschaften hat, um Abrasion an den Anlagenteilen zu vermeiden, und hinsichtlich der Stückigkeit deutlich über jener der Holzfasern liegt.Instead of wood chips, every other small piece Wood material can be used such. Chips from the Production of chipboard, sawdust from the sawmill industry, granulated chipboard or MDF boards, precipitated Fine material from the production of oriented strand board (OSB). These materials are in the woodworking industry sufficiently available, therefore well available and drawing characterized by low costs. What is essential is that Material has wood-like properties to abrasion on the Parts of the installation and with regard to Pieces are significantly higher than those of wood fibers.

Für die Charakterisierung der Größe der Einzelpartikel des kleinstückigen Holzmaterials können beispielhaft folgende Angaben zum relativen Massenanteile gemacht werden (Durchgang durch ein Sieb mit der entsprechenden Siebmaschenweite): Kleinstückiges Material kleiner 5mm größer 20mm Hackgut grob 3,0% 15,0% Hackgut fein 15,0 % 3,0% Sägemehl 60,0% 0,1% Granulierte Platten 35,0% 2,0% For the characterization of the size of the individual particles of the small piece of wood material, the following information on the relative mass fractions can be made by way of example (passage through a sieve with the corresponding mesh size): Small piece of material less than 5mm bigger 20mm Coarse wood chips 3.0% 15.0% Fine wood chips 15.0% 3.0% sawdust 60.0% 0.1% Granulated plates 35.0% 2.0%

Die Stückigkeit lässt sich auch anhand der Schüttdichte vergleichen - Fasern weisen eine von 20 bis 40 kg/m3 auf (z.B. mittlere Dichte der Fasermatte nach der Mattenbildung vor der Vorpresse), das kleinstückige Holz hat eine zwischen 100 und 200 kg/m3. Das kleinstückige Holz kann trocken sein oder auch den natürlichen Feuchtigkeitsgehalt aufweisen, welcher in der Regel zwischen 50% und 150% bezogen auf die Trockenmasse beträgt.The lumpiness can also be compared on the basis of the bulk density - fibers have a thickness of 20 to 40 kg / m 3 (eg average density of the fiber mat after the mat formation in front of the pre-press), the small-sized wood has a weight between 100 and 200 kg / m 3 . The small piece of wood may be dry or have the natural moisture content, which is usually between 50% and 150% based on the dry matter.

Das vom Zyklon abgetrennte kleinstückige Holz kann je nach Grad der Verschmutzung mit abgereinigten Anbackungen dem Reinigungsprozess im Sinne einer Materialkreislaufführung wieder zugeführt werden. Eine Zwischenlagerung für eine mehrmalige Verwendung ist ebenso möglich wie eine ausschließlich einmalige. Das Material kann, nachdem es für weitere Reinigungen ungeeignet ist, verbrannt, dem MDF-, dem Spanplattenfertigungsprozess oder einem vergleichbaren Plattenfertigungsprozess zugeführt werden oder anderweitig stofflich verwendet werden.The separated from the cyclone small pieces of wood may vary depending on Degree of contamination with cleaned caking Cleaning process in the sense of a material circulation be fed again. An intermediate storage for a multiple use is possible as well as one only one-time. The material can, after it for further cleanings is unsuitable, burned, the MDF, the chipboard manufacturing process or a comparable Plate production process can be supplied or otherwise used materially.

Beispiel 1: Eine Anlage ähnlich der in der DE 197 40 676 A1 beschrieben Anlage wurde über mehrere Produktionstage zur Trockenbeleimung von Fasern betrieben. Die Anlage ist ausgelegt für einen Faserdurchsatz von etwa 5.000 kg/Stunde trockenem Material und unterscheidet sich zur DE 197 40 676 A1 dadurch, dass kein Aggregat zur Auflösung von Faseragglomeraten vorhanden ist und dass der Faserstrom nicht von oben nach unten, sondern von unten nach oben durch die Beleimungszone geführt wird. Die Strömungsgeschwindigkeit im Bereich der Beleimungszone beträgt zwischen 15 und 30 m/s. Über die herkömmliche blow-line Beleimung wurden etwa 5 Masse% Leim angegeben als Festharz auf die Fasern aufgebracht, über die Trockenbeleimung ebensoviel. Nach drei Betriebstagen traten Störungen durch Anbackungen an den Innenwandungen der Anlage auf. Die Anlage wurde abgestellt und Anbackungen mit einer Stärke von mehreren Zentimetern wurden großflächig unmittelbar nach der Leimzuführzone festgestellt. Die Anlage wurde wieder angefahren, aber anstelle der Fasern wurde Hackgut der Anlage zugeführt. Das Hackgut entspricht der üblichen Größe und Qualität, wie es für die Herstellung von mitteldichten Faserplatten (MDF) verwendet wird. Nach einem Reinigungszyklus von ca. 10 Minuten wurde die Anlage erneut abgestellt und eine Kontrolle ergab, dass alle Anbackungen abgereinigt werden konnten. Das mit Anbackungen verunreinigte Hackgut konnte problemlos der Verbrennung zugeführt werden.Example 1: A plant similar to that in DE 197 40 676 A1 described plant was over several production days to Dry gluing operated by fibers. The facility is designed for a fiber throughput of about 5,000 kg / hour dry material and differs from DE 197 40 676 A1 in that no aggregate for the dissolution of Fiber agglomerates is present and that the fiber flow not from top to bottom, but from bottom to top through the gluing zone. The Flow velocity in the region of the gluing zone is between 15 and 30 m / s. About the conventional blow-line Glueing was reported as about 5% by mass of glue Solid resin applied to the fibers, over the Dry gluing as much. After three days of operation occurred Disturbances due to caking on the inner walls of the Plant on. The facility was turned off and caked with a thickness of several centimeters were large detected immediately after the glue feed zone. The Plant was restarted, but instead of the fibers wood chips were fed to the plant. The wood chips correspond the usual size and quality, as is the case for manufacturing Medium density fiberboard (MDF) is used. To a cleaning cycle of about 10 minutes was the plant again turned off and a check revealed that all Caking could be cleaned. That with caking contaminated wood chips could easily burn be supplied.

Claims (4)

  1. Process for cleaning equipment for dry bonding cellulose fibres, wherein the equipment exhibits dry bonding segment and a separation cyclone for separating the cellulose fibres from the conveyor air stream, characterised wherein
    instead of the fibres a small-sized wooden material is fed to the conveyor air stream prior to the dry bonding segment, wherein
    the contamination on the inner walls is caught by the particles of the small-sized wooden material, and wherein
    the small-sized wooden material is separated from the conveyor air stream by the separation cyclone.
  2. Process according to claim 1, in which chips, shavings from the fabrication of chip-board, sawdust from the saw milling industry, granulated chip-board or MDF-board or separated finely granulated from the fabrication of OSB-board are employed as the small-sized wooden material.
  3. Process according to claim 1 or 2, in which a wooden material having a bulk density (or settled apparent density) of 100 to 200 kg/mis employed as the small-sized wooden material.
  4. Process according to one of claims 1 to 3, in which the separated small-sized wooden material is fed back to the cleaning process in the course of a material circulating operation.
EP02020641A 2002-09-13 2002-09-13 Process for cleaning a mixer for the dry-glueing of cellulosic fibers Expired - Lifetime EP1398127B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT02020641T ATE310619T1 (en) 2002-09-13 2002-09-13 METHOD FOR CLEANING A SYSTEM FOR DRY GLUING OF CELLULOSE FIBERS
ES02020641T ES2252370T3 (en) 2002-09-13 2002-09-13 PROCEDURE FOR CLEANING AN INSTALLATION FOR DRY FIBER CLAMPING.
EP02020641A EP1398127B1 (en) 2002-09-13 2002-09-13 Process for cleaning a mixer for the dry-glueing of cellulosic fibers
DE50205037T DE50205037D1 (en) 2002-09-13 2002-09-13 Process for cleaning a plant for the dry gluing of cellulosic fibers
PL362169A PL197864B1 (en) 2002-09-13 2003-09-12 Method of cleaning of a system designed for dry sizing of cellulose fibres

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02020641A EP1398127B1 (en) 2002-09-13 2002-09-13 Process for cleaning a mixer for the dry-glueing of cellulosic fibers

Publications (2)

Publication Number Publication Date
EP1398127A1 EP1398127A1 (en) 2004-03-17
EP1398127B1 true EP1398127B1 (en) 2005-11-23

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EP02020641A Expired - Lifetime EP1398127B1 (en) 2002-09-13 2002-09-13 Process for cleaning a mixer for the dry-glueing of cellulosic fibers

Country Status (5)

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EP (1) EP1398127B1 (en)
AT (1) ATE310619T1 (en)
DE (1) DE50205037D1 (en)
ES (1) ES2252370T3 (en)
PL (1) PL197864B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602005024149D1 (en) 2004-08-27 2010-11-25 Force Technology METHOD AND DEVICE FOR APPLYING A SYNTHETIC BINDER TO A AIRFIBRE CURRENT
DE102004054162B3 (en) 2004-11-10 2006-05-04 Flakeboard Company Limited, St.Stephen Method and device for preventing contamination of a transport device due to freshly glued fibers
DE102005055813B4 (en) * 2005-11-21 2013-03-21 Fritz Egger Gmbh & Co. Apparatus and process for the production of wood-based materials and methods for cleaning

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1200521B (en) * 1964-07-28 1965-09-09 Baehre Metallwerk K G Device for gluing chips
CH625972A5 (en) * 1977-11-09 1981-10-30 Fahrni Peter Continuous mixer for gluing loose wood chips, fibres or other particles for manufacturing compacts
DE10059881B4 (en) * 2000-12-01 2005-06-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Plant for fiber preparation

Also Published As

Publication number Publication date
PL197864B1 (en) 2008-05-30
PL362169A1 (en) 2004-03-22
DE50205037D1 (en) 2005-12-29
EP1398127A1 (en) 2004-03-17
ES2252370T3 (en) 2006-05-16
ATE310619T1 (en) 2005-12-15

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