WO2011079960A1 - Procédé et système de transport de fibres encollées dans un tube de transport au cours de la fabrication de panneaux en fibres, mdf, hdf, en matériau dérivé du bois ou en plastique à partir de fibres ou d'un matériau similaire aux fibres - Google Patents

Procédé et système de transport de fibres encollées dans un tube de transport au cours de la fabrication de panneaux en fibres, mdf, hdf, en matériau dérivé du bois ou en plastique à partir de fibres ou d'un matériau similaire aux fibres Download PDF

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Publication number
WO2011079960A1
WO2011079960A1 PCT/EP2010/008003 EP2010008003W WO2011079960A1 WO 2011079960 A1 WO2011079960 A1 WO 2011079960A1 EP 2010008003 W EP2010008003 W EP 2010008003W WO 2011079960 A1 WO2011079960 A1 WO 2011079960A1
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WO
WIPO (PCT)
Prior art keywords
transport
transport tube
fibers
mixing zone
tube
Prior art date
Application number
PCT/EP2010/008003
Other languages
German (de)
English (en)
Inventor
Gernot Von Haas
Original Assignee
Dieffenbacher Gmbh + 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 Dieffenbacher Gmbh + Co. Kg filed Critical Dieffenbacher Gmbh + Co. Kg
Publication of WO2011079960A1 publication Critical patent/WO2011079960A1/fr

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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
    • 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
    • B27N1/0263—Mixing the material with binding agent by spraying the agent on the falling material, e.g. with the material sliding along an inclined surface, using rotating elements or nozzles

Definitions

  • the invention relates to a method for transporting glued fibers in a transport tube in the course of the production of fibers.
  • the invention relates to a method for transporting glued fibers in a transport tube in the course of the production of fiber, MDF, HDF, wood-based or plastic plates from fibers or fiber-like material Fiber, MDF, HDF, wood-based or plastic plates made of fibers or fiber-like material according to the preamble of claim 1.
  • the invention further relates to a system for transporting glued fibers in a transport tube in the course of the production of fiber, MDF, HDF, wood-based or plastic plates according to the preamble of claim 9.
  • Binder savings with consistent quality and technically optimized plant construction with low downtime and low wear Basically one understands under binder a so-called
  • Adhesive fleet which consists in its main component of an adhesive. Depending on requirements, in addition emulsion, hardener, formaldehyde scavengers, dyes, insect repellent and antifungal agents and other additives are added. It is also common to use the adhesive without additives. As binders come without claim to completeness in question:
  • Urea formaldehyde (UF), MUPF or PF Urea formaldehyde
  • the chips or chips are usually already delivered as chips or produced on site and fed to the gluing before or after drying.
  • Fibers are made by Zerfaservorraum locally and after the defibration between two grinding discs by a transport tube (technical term in the industry or for the expert in English: "Blow-Line” respectively "Blowline”), promoted to a dryer.
  • the excess steam is used to drive the fibers through the transport tube.
  • the transport pipe may have a length of up to 100m.
  • the fibers are glued and then conveyed into a dryer.
  • This high-pressure gluing poses great challenges to the plant, especially to the transport pipe, since the flow is extremely turbulent, with a Reynolds number of 7 ⁇ 10 5 to 3 ⁇ 10 6 .
  • the speed of the fibers is in a range of at least 50 m / s up to a speed of 474 m / s.
  • Gluing is introduced with nozzles in the transport tube, which the
  • Dissolve binder such that it is preferably injected with a size in the multi-digit micron range.
  • Atomizing (pressure) spray nozzles it is possible to split the binder to an approximate size of 100 to 40 microns. But it is necessary to work with high pressure nozzles, the binder on
  • the fibrous material is placed in a dryer, more preferably in the present
  • Embodiment of a tube dryer transferred and dried.
  • a cyclone is used, the polluted air dryer are cleaned as exhaust gases depending on the need or environmental conditions in a pre-filter and then usually burned.
  • the dried fibrous material is stored in bunkers after the cyclone and, as needed, into one
  • Scattering station discharged which forms the fiber material to a spreading material on a continuously moving forming belt and transported in the direction of a press.
  • a pre-pressing or pretreatment of the spreading material mat it is transferred to a continuously operating press and pressed by means of pressure and heat to form a material plate. After pressing, the surface grinding of the surfaces and the
  • the transport tube regularly sets by caking of the glue on the inner diameter and obstructs a proper flow of the material. This is especially true in the application of high performance atomization of the binder, as it takes longer, until the finely atomized binder has bound almost completely during the stay in the transport tube to the fibers. In particular, this period is extended when due to a reduced production (thin plates) fewer fibers per unit time are transported through the transport tube. Basically, the atomized binder tends to continue to apply to the inner diameter of the transport tube and enter there an adhesive connection. Even if there are high turbulent flows in the tube, coagulations of glue lumps can grow and clog the transfer tube over time. But problematic are in particular pipe kinks (usually 60 °, 90 °, 120 °), which are technically necessary to the transport pipe through the
  • the invention is therefore the object of a method for
  • the solution for the method for operating a plant is that the fibers in the mixing zone of the transport path of the transport tube substantially along a linear path and / or along at least one deflection angle of less than 30 ° and / or along at least one
  • the solution for a system according to the invention is that for transporting the fibers in the mixing zone of the transport route
  • Transport tube is arranged, which is designed substantially linear and / or at least one deflection angle less than 60 ° and / or at least one deflection radius greater than 10 m.
  • transport line stands for the transporting of fibers in a plant for the production of fiberboard, preferably by a defibrator (steam cooker) or a fiberizer of the transport is started and is preferably introduced into a tube dryer.
  • the fibers or the fiber-like material are glued in the transport path.
  • the present elaboration does not necessarily mean a transport tube in terms of its inner diameter as continuously constant. From the prior art examples, a variety of geometrical variations are known for the inner diameter of such a transport tube.
  • the transport tube can be further subdivided in such systems into two specific zones: Once in a pure transport zone for the fibers, directly following a defibrator to Beleimvorraum and the subsequent mixing zone in which the through the nozzles of the
  • Binder mixed with the fibers The length of the gluing zone (binding of all binding agent to the fibers) is, starting from the gluing device, per se flowing and can not be determined unambiguously, since measuring devices within the transporting device, in particular in the case of a supersonic fluid, fail.
  • the mixing zone is up to the entry into the Pipe dryer respectively adopted until the exit of the glued fibers from the transport tube by means of an outlet nozzle.
  • the system alone can be operated and has advantageous features, but is of course particularly suitable for carrying out the method.
  • the fibers are moved along a straight path in the tube dryer and finally injected into the tube dryer. It is necessary that the air duct in front of the outlet nozzle of the
  • Transport pipe is guided along a bend or a kink, so that the transport tube after gluing (mixing zone) can be performed substantially along a straight line or linear.
  • the Additional air swirls after a kink or bend advantageously support the drying effect on the exiting fibers.
  • the fibers in the mixing zone are preferably over
  • the fibers in the mixing zone are over a deflection radius of more than 4 m, more preferably greater than 10 m out.
  • the transport tube is at least partially cooled in the mixing zone, wherein
  • the transport tube preferably with water and / or on a
  • the binder is dispersed before entering the transport tube with steam and / or that the binder when discharged from the nozzle into the transport tube by means of steam crushed introduced into the transport tube.
  • the mixing zone should preferably be applied from the nozzles or from the gluing device of the transport tube 5 m to 20 m, preferably 7.5 m to 15 m, particularly preferably up to 10 m.
  • the gluing of the fibers before exiting the outlet nozzle of the transport tube can already be completed be.
  • one or more conventional 90 ° bend (s) may be provided, if necessary with a precautionary safety impact, from the plant or for introduction into a tube dryer.
  • the mixing zone is considered to be complete, no care with regard to the lines of the transport tube is more necessary.
  • Figure 1 is a schematic overview of a greatly simplified system for
  • Figure 2 is an enlargement of a possible arrangement of the area
  • FIG. 3 shows a further possible arrangement of the region according to FIG. 2, wherein the mixing zone of the transport path for introduction into the tube dryer forms a curve by means of a deflection radius,
  • Figure 4 shows another possible arrangement of the region of Figure 2, wherein the mixing zone of the transport path for introduction into the tube dryer an approximate curve of several
  • FIG. 5 shows an illustration of an exemplary cooling device for the
  • a defibrator 1, also called shredder which produces by thermo-mechanical defibration of wood, wood waste or similar starting material by means of pressure and steam fiber or fibers.
  • These fibers are transferred with steam to a transport tube 2 and glued during transport with one or more nozzles 5 of a gluing device, wherein the transport tube 2 can be designed with optional cooling in the mixing zone 21 with at least one cooling device 23.
  • the cooling device 23 for cooling the transport tube 2 to a temperature below 80 ° C care. Subsequently, the fibers are preferred with higher
  • Dryer air 6 in the tube dryer 3 is generated by a fan 12, which is supplied with heated (about 180 ° C to 220 ° C) and preferably dry air. After the tube dryer 3, which can be up to 100 m long, the dried fibers are passed to a cyclone 14, which is the
  • Dryer air 6 separates from the fibers and the dryer air 6, possibly with a certain amount of dust, passes to a pre-filter 16. Subsequently, the dryer air 6 is in a thermal exhaust air purification 17th
  • the dried fibers are passed in the cyclone 14 via a rotary valve 15 to a fiber bunker 8 and controlled from there into a spreader 10th
  • fiber bunker 8 and scattering devices 10 are a structural unit (as shown), of course, can also be arranged plant technology separately from each other or can be dispensed depending on the type of plant on a fiber bunker 8. Subsequently, the spreading material mat is introduced into a discontinuously (not shown) or discontinuously operating press 11 and after its compression to a fiberboard the field of
  • Fiber boards assembled, ground and stored accordingly.
  • FIG. 2 shows an enlargement of a possible arrangement of the area defibrator 1 - transport section 2 - tube dryer 3 in a side view (left) and a plan view (right) shown in Figure 1, wherein the transport path 2 is designed substantially linear and the air duct of the tube dryer 3 before introducing the glued fibers over the
  • Exit nozzle 19 has a deflection. It can be seen in the side view (left) that the defibrator 1 can be arranged elevated, for example, or even spatially even further separated from the gluing device 25.
  • the fan 12 for the tube dryer 3 is arranged in the left view behind the transport tube 2, so that after Beleimvorides 25 with the nozzles 5, the transport tube 2 of the mixing zone 21 can be performed substantially linearly.
  • the air duct of the tube dryer 3 between the outlet nozzle 19 and the fan 12 at least one bend or an angle, which can be seen in the right plan view of the part of the system. So that the dryer air 6 in
  • FIG. 3 shows a further possible arrangement of the region according to FIG. 2, the mixing zone 21 of the transport path 22 forming a curve by means of a deflection radius 9 for introduction into the tube dryer 3.
  • the mixing zone 21 is already arranged at an angle to the tube dryer 3 in the system itself, so that the necessary deflection radius 9 can be made as large as possible.
  • Deflection radius 9 preferably refer to the "neutral line" of
  • Transport pipe 2 ie on the line, along the center of the
  • Transport tube 2 runs.
  • FIG. 4 shows a further possible arrangement of the region according to FIG. 2, wherein the mixing zone 21 of the transport path 22 for introduction into the tube dryer 3 has an approximate curve of a plurality of deflection angles 4 arranged one behind the other.
  • the deflection angles are in this case arranged directly one behind the other and are at a distance from each other, in which the transport tube is currently running.
  • a combination of deflection and deflection curves or radii is conceivable. It remains to emphasize that a combination of all three mentioned
  • Possibilities (straight, angular, curved) is also possible, the application in the mixing zone 21 being variable.
  • the application in the mixing zone 21 being variable.
  • the transport tube 2 should be designed as straight as possible and preferably only in the vicinity of the outlet nozzle 19, before, during the crossing or in the tube dryer 3 angles or arcs.
  • the transport tube 2 and the tube dryer 3 are arranged at an angle to one another or relative to the exit direction of the fibers in the tube dryer 3 and the necessary arrangement of angles or arcs divide around the exit direction of the fibers essentially in accordance with the dryer air 6 in the tube dryer.
  • the cooling device 23 as a transport pipe 2 enveloping and sealed with respect to this jacket tube 28, the two connections for the Cooling water inlet 26 and the cooling water outlet 27.
  • the cooling device 23 as a transport pipe 2 enveloping and sealed with respect to this jacket tube 28, the two connections for the Cooling water inlet 26 and the cooling water outlet 27.
  • the temperature of the cooling medium at the cooling water inlet is substantially 50 ° C.
  • At least one deflection angle 4 of less than 30 ° and / or at least one deflection radius 9 of more than 2 m may be arranged.
  • the arrangement of the deflection 4 is defined so that the angle data relate to the angle of a theoretical straight extension of the transport tube 2 and the real branch (deflection 4) can be determined.
  • at least one deflection angle 4 in the mixing zone 21 is preferably less than 20 °, particularly preferably less than 10 °.
  • a deflection radius 9, insofar as necessary, should preferably be greater than 4 m, particularly preferably greater than 10 m.
  • larger angles or radii are to be preferred, so that the application of the parameters is not to be considered as arbitrary, but as selected.
  • the binder with vapor-dispersing nozzles 5 and / or the binder at exit are particularly preferred Steam crushing nozzles 5 arranged.
  • Transport tube 2 with a length of 5 m to 20 m, preferably 7.5 m to 15 m, particularly preferably up to 10 m is arranged.
  • the fibers are particularly preferably from the nozzles 5 of the
  • the system can be used independently as a device, but is also particularly suitable for carrying out the method

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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)
  • Paper (AREA)

Abstract

L'invention concerne un procédé de transport de fibres encollées dans un tube de transport au cours de la fabrication de panneaux en fibres, MDF, HDF, en matériau dérivé du bois ou en plastique à partir de fibres ou d'un matériau similaire aux fibres. Selon le procédé, les fibres sont transportées depuis un défibreur (1) dans un séchoir tubulaire par un tube de transport (2) sur un trajet de transport (22) et un liant constitué d'un liquide adhésif avec ou sans adjuvant est appliqué sur les fibres dans le tube de transport (2) au moyen d'au moins une buse (5) d'un dispositif d'encollage, le tube de transport (2) du trajet de transport (22) étant divisé par les buses (5) agencées du dispositif d'encollage en une zone de transport (20) et une zone de mélange (21). L'invention vise à éviter de manière efficace, à l'aide de moyens simples, la formation de dépôts, en particulier lors de l'utilisation de techniques de pulvérisation dans la plage inférieure du micron à deux chiffres. A cet effet, les fibres sont guidées depuis les buses (5) du dispositif d'encollage dans la zone de mélange (21) du trajet de transport (22) du tube de transport (2) sensiblement le long d'un trajet linéaire et/ou suivant au moins un angle de déviation (4) inférieur à 30° et/ou le long d'au moins un rayon de déviation (9) de plus de 2 m (1399).
PCT/EP2010/008003 2009-12-31 2010-12-31 Procédé et système de transport de fibres encollées dans un tube de transport au cours de la fabrication de panneaux en fibres, mdf, hdf, en matériau dérivé du bois ou en plastique à partir de fibres ou d'un matériau similaire aux fibres WO2011079960A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009060917.2 2009-12-31
DE200910060917 DE102009060917A1 (de) 2009-12-31 2009-12-31 Verfahren und Anlage zum Transport von beleimten Fasern in einem Transportrohr im Zuge der Herstellung von Faser-, MDF, Holzwerkstoff- oder Kunststoffplatten aus Fasern oder faserähnlichem Material

Publications (1)

Publication Number Publication Date
WO2011079960A1 true WO2011079960A1 (fr) 2011-07-07

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PCT/EP2010/008003 WO2011079960A1 (fr) 2009-12-31 2010-12-31 Procédé et système de transport de fibres encollées dans un tube de transport au cours de la fabrication de panneaux en fibres, mdf, hdf, en matériau dérivé du bois ou en plastique à partir de fibres ou d'un matériau similaire aux fibres

Country Status (2)

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DE (1) DE102009060917A1 (fr)
WO (1) WO2011079960A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1632450A1 (de) * 1968-02-10 1970-12-10 Draiswerke Gmbh Vorrichtung zum kontinuierlichen Mischen relativ kleiner Mengen einer feinteiligen Komponente mit einem durch einen Luftstrom bewegten Traegerstoff
US4533436A (en) * 1982-04-26 1985-08-06 The Celotex Corporation Apparatus for blow line addition of thermosettable binder in fiberboard manufacture including a cooling nozzle
EP0745463A2 (fr) * 1995-06-02 1996-12-04 Medite Corporation Procédé et dispositif de réduction des obstructions des conduites de transport pneumatique dans la fabrication de composites de cellulose
DE102006013567A1 (de) * 2006-03-24 2007-09-27 Glunz Ag Verfahren und Vorrichtung zum Aufbringen von Bindemittel auf Partikel, insbesondere Fasern, die durch einen Blasgang gefördert werden
WO2009116877A1 (fr) * 2008-03-18 2009-09-24 Mdf Tech Limited Buse d'injection améliorée

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1632450A1 (de) * 1968-02-10 1970-12-10 Draiswerke Gmbh Vorrichtung zum kontinuierlichen Mischen relativ kleiner Mengen einer feinteiligen Komponente mit einem durch einen Luftstrom bewegten Traegerstoff
US4533436A (en) * 1982-04-26 1985-08-06 The Celotex Corporation Apparatus for blow line addition of thermosettable binder in fiberboard manufacture including a cooling nozzle
EP0745463A2 (fr) * 1995-06-02 1996-12-04 Medite Corporation Procédé et dispositif de réduction des obstructions des conduites de transport pneumatique dans la fabrication de composites de cellulose
DE102006013567A1 (de) * 2006-03-24 2007-09-27 Glunz Ag Verfahren und Vorrichtung zum Aufbringen von Bindemittel auf Partikel, insbesondere Fasern, die durch einen Blasgang gefördert werden
WO2009116877A1 (fr) * 2008-03-18 2009-09-24 Mdf Tech Limited Buse d'injection améliorée

Also Published As

Publication number Publication date
DE102009060917A1 (de) 2011-07-07

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