EP1504865B1 - Procédé et dispositif pour enrober des matériaux coulant avec un liant - Google Patents

Procédé et dispositif pour enrober des matériaux coulant avec un liant Download PDF

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Publication number
EP1504865B1
EP1504865B1 EP04018258A EP04018258A EP1504865B1 EP 1504865 B1 EP1504865 B1 EP 1504865B1 EP 04018258 A EP04018258 A EP 04018258A EP 04018258 A EP04018258 A EP 04018258A EP 1504865 B1 EP1504865 B1 EP 1504865B1
Authority
EP
European Patent Office
Prior art keywords
wetting
section
free
materials
flowing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04018258A
Other languages
German (de)
English (en)
Other versions
EP1504865A2 (fr
EP1504865A3 (fr
Inventor
Peter Wolff
Klaus Radzimanowski
Roberto Fasa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SCHENCKMANN-PIEL-Engineering GmbH
Dieffenbacher GmbH and Co KG
Original Assignee
SCHENCKMANN-PIEL-Engineering GmbH
Dieffenbacher GmbH and Co KG
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 SCHENCKMANN-PIEL-Engineering GmbH, Dieffenbacher GmbH and Co KG filed Critical SCHENCKMANN-PIEL-Engineering GmbH
Publication of EP1504865A2 publication Critical patent/EP1504865A2/fr
Publication of EP1504865A3 publication Critical patent/EP1504865A3/fr
Application granted granted Critical
Publication of EP1504865B1 publication Critical patent/EP1504865B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B27N1/0227—Mixing the material with binding agent using rotating stirrers, e.g. the agent being fed through the shaft of the stirrer
    • B27N1/0254—Mixing the material with binding agent using rotating stirrers, e.g. the agent being fed through the shaft of the stirrer with means for spraying the agent on the material before it is introduced in the mixer
    • 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

Definitions

  • the invention relates to a method and a device for wetting free-flowing goods with a binder.
  • free-flowing goods in particular lignocellulose-containing particles such as wood fibers, wood chips, wood chips and fibers, chips and chips from renewable raw materials such as straw, hemp, bamboo, rice straw and granular plastic materials are included.
  • Plate-shaped materials in particular fibreboards, are produced by pressing glued fibers.
  • the wetting of the fibers with a binder is an important process step in this production process.
  • the gluing systems or processes have the task of distributing the binder uniformly over the fibers so that the binder content can be kept low.
  • a known method for gluing of free-flowing goods is the so-called blow-line gluing.
  • the still wet fibers are transported by vapor pressure through a conveyor line and thereby admixed with binder.
  • the glued fibers are then dried in a dryer and fed to the further production process.
  • fiber drying after gluing has the disadvantage of high glue consumption. Since the cost of the glue (binder) in relation to the cost of the fibers are very high, the high glue consumption represents a drastic increase in manufacturing costs.
  • Another disadvantage of this glue method is that is released during the drying of the previously glued fibers formaldehyde and hereby consuming dryer exhaust air cleaning measures are required.
  • Such a method and a device for the dry gluing of pneumatically conveyed particles is known.
  • the wood fibers are first dried in a dryer to the required final moisture content and then fed via a delivery line having a cross-sectional reduction, a wetting section.
  • the wetting section is provided with glue nozzles.
  • the wetting section is designed as a diffuser section, which is intended to effect a cross-sectional widening and thus a turbulent flow of the fibers in the section.
  • the process described above is intended to avoid the formation of fiber clumps, as these fiber clusters in the fiberboard surface can lead to size stains as well as causing damage to the press belts of the press.
  • the object of the present invention is to develop a method and a device for wetting flowable goods with a binder in the course of the production of plate-shaped materials in such a way that a uniform glue distribution and a high level of operational reliability are achieved.
  • the bulk goods to be wetted with binders referred to below as particles, are first dried to final moisture content.
  • the dried particles are then fed by means of transport air to a wetting section which is provided with a plurality of gluing nozzles.
  • the gluing nozzles are arranged spirally distributed along the wetting section over the circumference.
  • a reducing section which effects a cross-sectional reduction of D1 of the delivery line to D2 of the wetting section.
  • the Fig. 1 shows a schematic representation of the device according to the invention for the wetting of particles, in particular of wood fibers with a binder in the course of the production of fiberboard.
  • the delivery line 4 is charged by means of a heat exchanger 5 with heated air, which has approximately 60-120 °, preferably 90 °.
  • heated air serves as transport air and leads the wood fibers along the conveying line 4 in the direction of the arrows 6 to the wetting section 7.
  • the transport air could also have room temperature.
  • a reducing section 8 is integrated in the conveying line 4, which causes a reduction of the diameter D1 of the conveying line 4 to a diameter D2 and thus an increase in the speed of the conveyed wood fibers.
  • the subsequent to the Reduzierabites 8 wetting section 7 is formed as a pipe section with a constant diameter D2.
  • the diameter of the pipe section may also be formed slightly smaller or larger in the conveying direction.
  • the length of the wetting section L1 is 20 to 30 meters, depending on the plant capacity. Due to the reduction of the diameter from D1 to D2 immediately before the wetting section 7, the wood fibers reach a maximum speed of about 30-60 m / s when flowing into the wetting section 7.
  • a plurality of circumferentially spirally arranged glue nozzles 9 are provided in the conveying direction along the wetting portion 7 .
  • the number and arrangement of the glue nozzles 9 can be adjusted depending on the type of glue and the amount of glue.
  • the glue or binder is brought by dilution to the viscosity required for the injection.
  • the wetting portion 7 is made of a high-quality polished material to prevent glue deposits on the inner circumferential surface along the wetting portion 7.
  • Furthermore, in order to prevent caking on the shell inner surface of the wetting portion 7 is formed as a double-walled tube having an inlet E and an outlet A for a cooling medium. The temperature of the cooling medium is adjusted so that forms a condensate film on the pipe inner wall.
  • an indwelling zone 10 is formed, which is likewise designed as a pipe section with the diameter D2 and has a length L2 of approximately 15 to 30 meters.
  • This pipe section is also made of high quality polished material to prevent glue deposits.
  • the wetting zone 7 downstream of the wetting zone 7 serves to further homogenize the wetting of the fibers.
  • a mixing chamber 11 is arranged, which is provided with baffles to effect a uniform mixing of the glued fibers with an additionally supplied air flow.
  • the baffles are arranged parallel spaced in the conveying direction running.
  • the supplied air stream has a temperature of 60-120 ° C., preferably 90 ° C., and is supplied to the mixing chamber 11 via a separate feed line 12.
  • Downstream of the mixing chamber 11 is a further conveying line 13, in which the glued fibers are post-dried by means of the supplied hot air. This drying is on this Place required because the glue was added to the fibers water and thus the previously set final moisture was increased by wetting with binder.
  • the feed line 13 downstream of the mixing chamber 11 has a substantially larger diameter D3 than the diameter of the wetting and residence section, so that the transport speed at this point is reduced and the residence time in this section is greater.
  • the glued fibers pass through a cyclone and are subsequently fed to the scattering bunker associated with a forming station. There, the glued fibers are sprinkled to a non-woven fabric and then pressed into wood fiber boards.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Drying Of Solid Materials (AREA)
  • Paper (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Claims (8)

  1. Procédé, dont le but est d'humecter avec un agent liant des matériaux d'épandage de nature granulaire, soit en particulier fibres, particules ou rognures de matériaux lignocellulosiques et/ou de matières brutes cellulosiques, ou de matières plastiques, procédant par étapes comme suit :
    a) Séchage du matériau d'épandage de nature granulaire à concurrence d'une valeur ultime d'humidité de 3-20%;
    b) Apport des matériaux d'épandage de nature granulaire dans une tuyauterie de transport (4) ;
    c) Convoyage pneumatique des matériaux d'épandage de nature granulaire par une tuyauterie de transport (4) vers un tronçon humecteur (7) ;
    d) Accélération du flux des matériaux d'épandage de nature granulaire sur un tronçon réducteur (8) se trouvant à l'amont immédiat du tronçon humecteur (7) ;
    e) Humectation des matériaux d'épandage de nature granulaire sur le tronçon d'humectation (7) au moyen d'un agent liant ;
    caractérisé en ce que l'humectation du matériau d'épandage de nature granulaire est effectuée à vélocité accrue du flux et que le matériau d'épandage de nature granulaire est ensuite séché dans la tuyauterie de transport (13) par addition d'un gaz propulseur refoulé échauffé.
  2. Procédé ayant pour but d'humecter les matériaux d'épandage de nature granulaire selon la revendication 1, où les matériaux d'épandage de nature granulaire, après être passés par le tronçon humecteur (7) aboutissent ensuite au tronçon de temporisation (10).
  3. Procédé ayant pour but d'humecter les matériaux d'épandage de nature granulaire selon la revendication 1 ou 2, le convoyage pneumatique étant effectué au moyen d'air échauffé.
  4. Procédé ayant pour but d'humecter les matériaux d'épandage de nature granulaire selon l'une des revendications précédentes, la température de la surface extérieure du tronçon d'humectation (7) étant équilibrée de telle manière, qu'une pellicule de condensat se dépose sur la paroi intérieure.
  5. Dispositif permettant d'humecter avec un agent liant des matériaux de nature granulaire transportés par convoyeur pneumatique, les matériaux de nature granulaire étant d'abord séchés à concurrence de la valeur d'humidité finale, et transportés ensuite dans une tuyauterie de transport (4) vers le tronçon humecteur (7), un tronçon réducteur (8) se trouvant en amont du tronçon humecteur (7), le tronçon réducteur formant une réduction de section transversale D1 de la tuyauterie de convoyage (4) à la section transversale D2 du tronçon humecteur (7), celui-ci étant équipé d'un grand nombre de buses de collage (9), caractérisé en ce que le tronçon humecteur (7) est d'une section transversale D2 sur la totalité de la longueur de convoyage (L1) et qu'en aval du tronçon d'humectation (7) on trouve une conduite de convoyage (13) où il est procédé au séchage des matériaux de nature granulaire.
  6. Dispositif permettant d'humecter au moyen d'un agent liant des matériaux de nature granulaire par transportés par convoyage pneumatique selon la revendication 5, un tronçon temporisant (10) étant intercalé entre le tronçon humecteur (7) et la conduite de convoyage (13).
  7. Dispositif permettant d'humecter au moyen d'un agent liant des matériaux de nature granulaire transportés par convoyage pneumatique selon la revendication 6, le tronçon temporisant (10) étant connecté avec le caisson de mélange (11), le caisson de mélange (11) étant équipé d'une conduite d'alimentation (12) pour le milieu de convoyage gazeux échauffé.
  8. Dispositif permettant d'humecter au moyen d'un agent liant des matériaux de nature granulaire transportés par convoyage pneumatique selon les revendications 5 à 7, le tronçon humecteur (7) étant constitué par un matériau poli de haute qualité, étant formé comme un tube à double paroi ayant une prise d'admission et une évacuation pour le milieu refroidisseur.
EP04018258A 2003-08-05 2004-08-02 Procédé et dispositif pour enrober des matériaux coulant avec un liant Expired - Lifetime EP1504865B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10336533A DE10336533A1 (de) 2003-08-05 2003-08-05 Verfahren und Vorrichtung zum Benetzen von rieselförmigen Gütern mit einem Bindemittel
DE10336533 2003-08-05

Publications (3)

Publication Number Publication Date
EP1504865A2 EP1504865A2 (fr) 2005-02-09
EP1504865A3 EP1504865A3 (fr) 2005-05-04
EP1504865B1 true EP1504865B1 (fr) 2010-01-13

Family

ID=33547161

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04018258A Expired - Lifetime EP1504865B1 (fr) 2003-08-05 2004-08-02 Procédé et dispositif pour enrober des matériaux coulant avec un liant

Country Status (3)

Country Link
EP (1) EP1504865B1 (fr)
AT (1) ATE454969T1 (fr)
DE (2) DE10336533A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ530339A (en) 2004-06-23 2007-01-26 Nz Forest Research Inst Ltd Method for producing wood fibre pellets
DE102008052961B4 (de) * 2008-10-23 2016-07-28 SWISS KRONO Tec AG Verfahren zum Herstellen von Holzwerkstoffen
DE202008015419U1 (de) 2008-11-21 2010-04-22 Epple, Albrecht, Dr. Vorrichtung zur Beleimung von Fasern in einem Blasrohr
IT1399772B1 (it) 2010-04-30 2013-05-03 Imal Srl Apparato per l'iniezione di componenti chimici in un flusso di materiale legnoso incoerente

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2850421A (en) * 1953-03-31 1958-09-02 George F Shea Method for producing reinforced plastic, resinous, or like structural bodies, forms,linings, and coatings
DE1692852B1 (de) * 1966-10-28 1971-06-24 Fiskeby Ab Verfahren und Vorrichtung zur Behandlung von Holzschnitzeln
SE461202B (sv) * 1988-05-19 1990-01-22 Fredriksson Sven Saett och anordning foer att tillverka en fiberplatta
DE19506353A1 (de) * 1995-02-23 1996-08-29 Schenck Ag Carl Verfahren und Vorrichtung zum Benetzen mit einem Fluid
DE19740676C2 (de) * 1997-09-16 2003-07-17 Fraunhofer Ges Forschung Verfahren zum Beleimen von Fasern
IT1307924B1 (it) * 1999-01-25 2001-11-29 Cmp Spa Apparecchiatura incollatrice per impianti per produrre pannelli infibra di legno.
DE10061072A1 (de) * 2000-12-08 2002-06-13 Flakeboard Company Ltd St Step Verfahren und Vorrichtung zum Beleimen von zur Herstellung von Faserplatten vorgesehenen, getrockneten Fasern
DE10153593B4 (de) * 2001-11-02 2005-11-17 Fritz Egger Gmbh & Co Vorrichtung und Verfahren zum Benetzen von Holzfasern mit einem Bindemittelfluid
DE10226820B3 (de) * 2002-06-15 2004-04-01 Flakeboard Company Limited, St.Stephen Verfahren und Vorrichtung zum Beleimen von zur Herstellung von Faserplatten vorgesehenen, getrockneten Fasern

Also Published As

Publication number Publication date
DE502004010630D1 (de) 2010-03-04
EP1504865A2 (fr) 2005-02-09
ATE454969T1 (de) 2010-01-15
DE10336533A1 (de) 2005-02-24
EP1504865A3 (fr) 2005-05-04

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