EP3323501A1 - Device and method for glueing particles - Google Patents

Device and method for glueing particles Download PDF

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Publication number
EP3323501A1
EP3323501A1 EP17195034.8A EP17195034A EP3323501A1 EP 3323501 A1 EP3323501 A1 EP 3323501A1 EP 17195034 A EP17195034 A EP 17195034A EP 3323501 A1 EP3323501 A1 EP 3323501A1
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EP
European Patent Office
Prior art keywords
nozzle
binder
primary
primary nozzle
transport tube
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.)
Granted
Application number
EP17195034.8A
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German (de)
French (fr)
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EP3323501B1 (en
Inventor
Dieter Aengenvoort
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Siempelkamp Maschinen und Anlagenbau GmbH and Co KG
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Siempelkamp Maschinen und Anlagenbau GmbH and Co KG
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Publication of EP3323501A1 publication Critical patent/EP3323501A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/311—Injector mixers in conduits or tubes through which the main component flows for mixing more than two components; Devices specially adapted for generating foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3143—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit characterised by the specific design of the injector
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
    • B01F33/404—Mixers using gas or liquid agitation, e.g. with air supply tubes for mixing material moving continuously therethrough, e.g. using impinging jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/1606—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air
    • 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
    • B27N1/0209—Methods, e.g. characterised by the composition of the agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/0075—Nozzle arrangements in gas streams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
    • B05B7/061—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with several liquid outlets discharging one or several liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/002—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour incorporating means for heating or cooling, e.g. the material to be sprayed
    • 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
    • B27N1/029—Feeding; Proportioning; Controlling

Definitions

  • the invention relates to a method for the gluing of particles, wherein the particles are transported in a transport tube in a flow direction by means of a carrier medium, wherein at least one primary nozzle, a binder is injected into the transport tube and wherein by means of at least a second nozzle for the injection of compressed air and / or water and / or steam the injected binder predetermined a flow direction and / or it is atomized.
  • the invention further relates to a device for gluing particles with a transport tube, in which the particles are transported in a flow direction by means of a carrier medium, at least one primary nozzle which injects a binder into the transport tube and at least one second nozzle for the injection of compressed air and / or Water and / or steam in order to specify a flow direction and / or to atomize the binder.
  • the gluing of particles is a known process for a long time.
  • the handling of wood particles so for example chips or fibers is described, which may be previously produced in a defibrating device (refiner) and be pressed in a later process continuously or discontinuously as a particle mat to wood fiber boards.
  • binders which can be used for "gluing” are primarily isocyanates, methylene diphenyl isocyanates, urea formaldehydes, phenolic resins and the like. ⁇ . To understand.
  • the binder is understandably to all in the transport tube (also called blowline) conveyed particles are transmitted as evenly as possible. In addition, it should be avoided that the binder alone or with the particles can settle on the wall of the transport tube and thus changes the cross section, the flow velocity and the pressure in the transport tube.
  • the binder is introduced via a nozzle device with a velocity component directed counter to the main flow direction.
  • fibers can enter the nozzle during production interruption. The glue and / or the fibers in the nozzle can harden over heat and moisture, after which a cleaning of the nozzle is possible only through a costly disassembly.
  • the nozzle is guided and operated as far as the central axis of the transport tube (blow-line), there is also the risk that the binder will harden with time due to the temperature influence of the usually hot carrier medium before the nozzle outlet, thus clogging the nozzle as well ,
  • the invention therefore has the task of developing a method and a device for gluing particles, in which, with a uniform distribution of the binder on the particles, the period between the cleaning cycles can be significantly increased.
  • the invention is achieved with regard to the method by the features of claim 1 and in particular by the fact that the binder spray in the flow direction behind the exit from the primary nozzle of a compressed air and / or steam and / or water jet from a of the primary nozzle (flow direction (F)) spaced secondary nozzle is met and deflected.
  • a spray from the primary nozzle is deflected by the particle flow and its carrier medium. Without the following secondary nozzle, emerges from the compressed air, steam or water in the direction of Bindeffensprühstrahls, the binder would possibly pressed with fibers to the transport tube wall and "cake" there. With the help of the jet from the spaced secondary nozzle, however, it is possible to evenly distribute the binder jet over the entire transport pipe cross section and in this way to reach and wet all the particles flowing in the transport pipe. In addition, it can be achieved by a desired even finer atomization of the binder.
  • an angle of 10 to 80 ° is set between the spray of the primary and the secondary nozzle.
  • the exact angle depends on the flow rate, the transport volume, the pressure and the temperature in the transport tube. But it is possible to calculate the optimal angle or to find it by a model. The angle also determines the distance between the primary and secondary nozzles.
  • water it is preferable to use water as the coolant. And it is also preferred in many cases that a coolant exits the primary nozzle during operation with the binder.
  • the binder is to be diluted or even finely atomized.
  • the object is achieved in terms of the device for gluing particles with the features of claim 5 and in particular in that the primary and a secondary nozzle (flow direction (F)) are spaced apart and are arranged at different angles such that the spray of the secondary nozzle In operation, it hits the spray jet of the primary nozzle.
  • orientation of the primary nozzle is substantially perpendicular (i.e., ⁇ 20 °) to the flow direction.
  • the spray from the secondary nozzle is fan-shaped.
  • the primary nozzle has a cooling device.
  • annular channel is provided around the primary nozzle through which cold water can flow as coolant. This avoids that the high temperatures prevailing in the transport tube, transferred to the nozzle head of the primary nozzle and harden binders.
  • the coolant exits the primary nozzle during operation with the binder.
  • the binder spray can additionally be vortexed and / or diluted and / or atomized.
  • the primary nozzle is used as a two-substance nozzle.
  • the annular channel has one or more outlet openings to the nozzle outlet of the binder out, usually for water. In addition, so no separate return from the annular channel is necessary.
  • a needle provided with an actuator is present in the primary nozzle.
  • This movable needle allows piercing the nozzle orifice in the event that any material has yet settled there.
  • This needle can be used as a stopper at the outlet in cases where the spraying of binders must be interrupted.
  • the primary nozzle and the secondary nozzle are attached to a common holder.
  • the holder can then be detachably and sealingly secured to the transport tube with the two nozzles when the transport tube has the necessary openings for the spray jets. This arrangement allows for maintenance cases rapid replacement of both nozzles by a provided identical spare part.
  • the primary and the secondary nozzle are attached to an end portion of the transport tube, which is already inside a dryer.
  • FIG. 1 a schematic, greatly simplified and cut view of a plant for gluing and drying of wood particles.
  • Fig. 2 represents in a cross section through the dryer tube, as the transport tube is attached.
  • Fig. 3 is an enlarged sectional view through the device for gluing with primary and secondary nozzle.
  • Fig. 4 schematically shows the preferred embodiment of a steam jet.
  • the binder components are marked with small crosses, water is shown in dotted lines and steam is symbolized by black lines.
  • the particle streams 12 with the associated carrier medium, the heating gas flow 11 and the gas and water and particle flow 20 are marked only by the corresponding reference numerals.
  • Fig. 1 shows a curved tube 19 a drying device 2.
  • warm and dry exhaust gases so-called hot gases 11 flow at very high temperatures.
  • the straight transport tube 3 is in the outer Curvature introduced into tube 19 and held centrally with a fixing star 10, so that the guided over the transport tube gas, water and particle stream 20 enters the center of the dryer.
  • the fixation star 10 is in Fig. 2 showing a section through the curved tube 19 and the transport tube 4, clearly shown.
  • the holder 6 for the primary nozzle 4 and the secondary nozzle 5 is mounted on the transport pipe 4, the holder 6 for the primary nozzle 4 and the secondary nozzle 5 is mounted.
  • the circular dashed outlined primary and secondary nozzle are in the description to Fig. 3 explained as subject matter essential to the invention.
  • the supply lines to the nozzles are indicated. It is the binder feed 7 and the water supply 8 to the primary nozzle 4 and the steam supply 9 to the secondary nozzle 5, wherein the secondary nozzle could alternatively be operated with compressed air or water.
  • Such a supply (7, 8, 9) is usually realized by pipes or hoses.
  • Fig. 3 shows in enlarged and sectional view the device 1 for gluing the wood particle stream 12 with the holder 6 for the primary nozzle 4 and the secondary nozzle 5, which in Fig. 1 circled dashed.
  • the nozzles 5 and 6 are shown cut.
  • the primary nozzle 4 has the nozzle opening 21.1, the secondary nozzle 5 the nozzle opening 21.2.
  • the primary nozzle 4 is at right angles to the particle flow 12. It sprays binder, for example isocyanate, into the transport tube 4, but does not reach into the tube. As a result, first, abrasion by the particle flow and, secondly, the entry of particles into the nozzle are avoided.
  • binder for example isocyanate
  • a needle 17 is shown, which is movable via an activator, not shown. Thus, the outlet can be sealed off and / or cleaned.
  • annular channel 16 is arranged around the binder channel 15, which serves with the flow of a cooling medium, in this case water, down to the outlet 21.1 as a cooling device ,
  • a cooling medium in this case water
  • the water exits the primary nozzle 4 with the binder.
  • the binder can be better atomized and cooled in this way, because in the transport tube, the particle flow is often entrained by the carrier medium water vapor. This is hot and would cure the binder too early, so even before leaving the transport tube 4.
  • the exit of the water from the primary nozzle 4 is not decisive for the invention and the coolant can also be removed elsewhere.
  • the second separate and slightly spaced secondary nozzle 5 which is arranged in this example at 45 ° to the flow direction F, steam is sprayed through the steam channel 18 against the exiting binder / water spray jet 14.
  • the angle between the binder spray 14 and the steam jet 13 depends on many factors and can be fixed in experiments or calculations. In an intended particularly comfortable embodiment of the invention is also provided to make the angle adjustable via motors or actuators. In any case, it should be between 10 and 80 °.
  • the impact of the steam jet 13 on the exiting binder / water spray 14 has the consequence that the binder / water spray jet 14 is not directly back to the wall by the particle flow, which may have about 250 m / s speed of the transport tube is steered and "caked" there. Rather, causes the steam jet or possibly also a water jet 13 from the secondary nozzle 5, that the binder distributed evenly over the transport pipe cross-section and can wet all wood particles.
  • Fig. 4 is indicated that the favored design of the steam steel 13 is flat and fan-shaped.
  • the primary nozzle 4 is designed so that it can be pulled without great effort from the holder 6 for maintenance.

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Nozzles (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Beleimung von Partikeln, wobei die Partikel in einem Transportrohr (3) in einer Strömungsrichtung (F) mittels eines Trägermediums transportiert werden, wobei mit wenigstens einer Primärdüse (4) ein Bindemittel in das Transportrohr (3) einspritzt wird und wobei mit wenigstens einer zweiten Düse zur Einspritzung von Pressluft und/oder Wasser und/oder Dampf dem eingespritzten Bindemittel eine Strömungsrichtung vorgegeben und/oder es zerstäubt wird. Um bei einer gleichmäßigen Verteilung des Bindemittels auf die Partikel den Zeitraum zwischen den Reinigungszyklen deutlich erhöhen zu können, ist vorgesehen, dass der Bindemittel-Sprühstrahl (14) des in Strömungsrichtung (F) hinter dem Austritt aus der Primärdüse (4) von einem Pressluft- und/oder Dampf- und/oder Wasserstrahl (13) aus der von der Primärdüse (4) beabstandeten Sekundärdüse (5) getroffen und abgelenkt wird.The invention relates to a method and a device for gluing particles, wherein the particles are transported in a transport tube (3) in a flow direction (F) by means of a carrier medium, with at least one primary nozzle (4) a binder in the transport tube (3). is injected and wherein at least one second nozzle for injecting compressed air and / or water and / or steam, the injected binder, a flow direction predetermined and / or it is atomized. In order to be able to increase the time between the cleaning cycles with a uniform distribution of the binder on the particles, it is provided that the binder spray jet (14) of the flow direction (F) behind the exit from the primary nozzle (4) from a compressed air and / or steam and / or water jet (13) from the of the primary nozzle (4) spaced secondary nozzle (5) is hit and deflected.

Description

Die Erfindung betrifft ein Verfahren zur Beleimung von Partikeln, wobei die Partikel in einem Transportrohr in einer Strömungsrichtung mittels eines Trägermediums transportiert werden, wobei mit wenigstens einer Primärdüse ein Bindemittel in das Transportrohr einspritzt wird und wobei mit Hilfe wenigstens einer zweiten Düse zur Einspritzung von Pressluft und/oder Wasser und/oder Dampf dem eingespritzten Bindemittel eine Strömungsrichtung vorgegeben und/oder es zerstäubt wird.The invention relates to a method for the gluing of particles, wherein the particles are transported in a transport tube in a flow direction by means of a carrier medium, wherein at least one primary nozzle, a binder is injected into the transport tube and wherein by means of at least a second nozzle for the injection of compressed air and / or water and / or steam the injected binder predetermined a flow direction and / or it is atomized.

Die Erfindung betrifft ferner eine Vorrichtung zum Beleimen von Partikeln mit einem Transportrohr, in dem die Partikel in einer Strömungsrichtung mittels eines Trägermediums transportiert werden, wenigstens einer Primärdüse, die ein Bindemittel in das Transportrohr einspritzt und wenigstens einer zweiten Düse zur Einspritzung von Pressluft und/oder Wasser und/oder Dampf, um dem Bindemittel eine Strömungsrichtung vorzugeben und/oder es zu zerstäuben.The invention further relates to a device for gluing particles with a transport tube, in which the particles are transported in a flow direction by means of a carrier medium, at least one primary nozzle which injects a binder into the transport tube and at least one second nozzle for the injection of compressed air and / or Water and / or steam in order to specify a flow direction and / or to atomize the binder.

Die Beleimung von Partikeln ist ein an sich seit langem bekannter Vorgang. Im Folgenden wird der Umgang mit Holzpartikeln, also beispielsweise Spänen oder Fasern, beschrieben, die zuvor in einer Zerfaserungseinrichtung (Refiner) hergestellt sein können und in einem späteren Prozess kontinuierlich oder diskontinuierlich als Partikelmatte zu Holzfaserplatten verpresst werden.The gluing of particles is a known process for a long time. In the following, the handling of wood particles, so for example chips or fibers is described, which may be previously produced in a defibrating device (refiner) and be pressed in a later process continuously or discontinuously as a particle mat to wood fiber boards.

Unter den zur "Beleimung" nutzbaren Bindemitteln sind in erster Linie Isocyanate, Methylendiphenylisocyanate, Harnstoffformaldehyde, Phenolharze u. ä. zu verstehen.Among the binders which can be used for "gluing" are primarily isocyanates, methylene diphenyl isocyanates, urea formaldehydes, phenolic resins and the like. Ä. To understand.

Zur Einspritzung des Leims hat man sich in der Vergangenheit viele Gedanken gemacht. Dabei soll das Bindemittel verständlicherweise auf alle im Transportrohr (auch Blowline genannt) geförderten Partikel möglichst gleichmäßig übertragen werden. Außerdem soll vermieden werden, dass sich das Bindemittel allein oder mit den Partikeln an der Wandung des Transportrohres festsetzen kann und damit den Querschnitt, die Strömungsgeschwindigkeit und den Druck im Transportrohr verändert.In the past, many thoughts have been given on the injection of glue. The binder is understandably to all in the transport tube (also called blowline) conveyed particles are transmitted as evenly as possible. In addition, it should be avoided that the binder alone or with the particles can settle on the wall of the transport tube and thus changes the cross section, the flow velocity and the pressure in the transport tube.

Aus der DE102015201464 A1 ist beispielsweise bekannt, dass das Bindemittel über eine Düsenvorrichtung mit einer entgegen der Hauptströmungsrichtung gerichteten Geschwindigkeitskomponente eingeleitet wird. Dies führt zu einer guten Verteilung des Bindemittels über den ganzen Rohrquerschnitt, hat aber den Nachteil, dass die Düse beispielsweise durch Voraushärtung eines Isocyanats, verstopfen kann. Außerdem können bei Produktionsunterbrechung Fasern in die Düse gelangen. Der Leim und/oder die Fasern in der Düse können über Hitze und Feuchtigkeit aushärten, wonach ein Reinigen der Düse nur über eine aufwändige Demontage möglich ist.From the DE102015201464 A1 For example, it is known that the binder is introduced via a nozzle device with a velocity component directed counter to the main flow direction. This leads to a good distribution of the binder over the entire pipe cross-section, but has the disadvantage that the nozzle, for example, by pre-curing of an isocyanate, can clog. In addition, fibers can enter the nozzle during production interruption. The glue and / or the fibers in the nozzle can harden over heat and moisture, after which a cleaning of the nozzle is possible only through a costly disassembly.

Wird die Düse wie in einigen Ausführungen bis in die Mittelachse des Transportrohres (Blowline) geführt und betrieben, besteht auch die Gefahr, dass das Bindemittel vor dem Düsenaustritt aufgrund des Temperatureinflusses des in der Regel heißen Trägermediums mit der Zeit aushärtet und so auch die Düse verstopft.If, as in some embodiments, the nozzle is guided and operated as far as the central axis of the transport tube (blow-line), there is also the risk that the binder will harden with time due to the temperature influence of the usually hot carrier medium before the nozzle outlet, thus clogging the nozzle as well ,

Die Erfindung hat deshalb die Aufgabe, ein Verfahren und eine Vorrichtung zum Beleimen von Partikeln zu entwickeln, bei dem bei einer gleichmäßigen Verteilung des Bindemittels auf die Partikel der Zeitraum zwischen den Reinigungszyklen deutlich erhöht werden kann.The invention therefore has the task of developing a method and a device for gluing particles, in which, with a uniform distribution of the binder on the particles, the period between the cleaning cycles can be significantly increased.

Die Erfindung wird hinsichtlich des Verfahrens durch die Merkmale des Anspruchs 1 und insbesondere dadurch gelöst, dass der Bindemittel-Sprühstrahl in Strömungsrichtung hinter dem Austritt aus der Primärdüse von einem Pressluft- und/oder Dampf- und/oder Wasserstrahl aus einer von der Primärdüse (Strömungsrichtung (F)) beabstandeten Sekundärdüse getroffen und abgelenkt wird.The invention is achieved with regard to the method by the features of claim 1 and in particular by the fact that the binder spray in the flow direction behind the exit from the primary nozzle of a compressed air and / or steam and / or water jet from a of the primary nozzle (flow direction (F)) spaced secondary nozzle is met and deflected.

Ein Sprühstrahl aus der Primärdüse wird von der Partikelströmung und dessen Trägermedium umgelenkt. Ohne die folgende Sekundärdüse, aus der Pressluft, Dampf oder Wasser in Richtung des Bindemittelsprühstrahls austritt, würde das Bindemittel ggf. mit Fasern an die Transportrohrwandung gedrückt und dort "anbacken". Mit Hilfe des Strahls aus der beabstandeten Sekundärdüse ist es jedoch möglich, den Bindemittelstrahl über den ganzen Transportrohrquerschnitt gleichmäßig zu verteilen und auf diese Weise alle im Transportrohr strömenden Partikel zu erreichen und zu benetzen. Zudem kann dadurch eine gewünschte noch feinere Zerstäubung des Bindemittels erreicht werden.A spray from the primary nozzle is deflected by the particle flow and its carrier medium. Without the following secondary nozzle, emerges from the compressed air, steam or water in the direction of Bindemittelsprühstrahls, the binder would possibly pressed with fibers to the transport tube wall and "cake" there. With the help of the jet from the spaced secondary nozzle, however, it is possible to evenly distribute the binder jet over the entire transport pipe cross section and in this way to reach and wet all the particles flowing in the transport pipe. In addition, it can be achieved by a desired even finer atomization of the binder.

Selbst wenn dazu der Sprühstrahl aus der Sekundärdüse ähnlich wie bei der Primärdüse in der DE102015201464 A1 mit einer entgegen der Strömungsrichtung gerichteten Geschwindigkeitskomponente eingerichtet ist, besteht hier keine Gefahr der Verstopfung, denn die Sekundärdüse sprüht kein Medium, das aushärten könnte.Even if, in addition to the spray from the secondary nozzle similar to the primary nozzle in the DE102015201464 A1 is set up with a directed against the flow direction velocity component, there is no risk of clogging, because the secondary nozzle sprays no medium that could harden.

Bevorzugt wird ein Winkel von 10 bis 80° zwischen dem Sprühstrahl der Primär- und der Sekundärdüse eingestellt.Preferably, an angle of 10 to 80 ° is set between the spray of the primary and the secondary nozzle.

Der genaue Winkel ist abhängig von der Fließgeschwindigkeit, der Transportmenge, dem Druck und der Temperatur im Transportrohr abhängig. Aber es ist möglich, den optimalen Winkel zu berechnen oder anhand eines Modells zu eruieren. Durch den Winkel wird auch der Abstand von Primär- und Sekundärdüse bestimmt.The exact angle depends on the flow rate, the transport volume, the pressure and the temperature in the transport tube. But it is possible to calculate the optimal angle or to find it by a model. The angle also determines the distance between the primary and secondary nozzles.

Es ist von Vorteil, wenn die Primärdüse bis hin zur Austrittsöffnung gekühlt wird.It is advantageous if the primary nozzle is cooled up to the outlet opening.

Das ist möglich, indem zumindest ein von der Düse getrennter, sich aber in unmittelbarer Nähe befindlicher Kanal beispielsweise mit einem Kühlmittel durchströmt wird, an das die Wärme in der Düse abgegeben werden kann. Dadurch wird eine Verkrustung und Aushärtung des Bindemittels vermieden.This is possible by flowing through at least one separate from the nozzle, but located in the immediate vicinity channel, for example, with a coolant to which the heat in the nozzle can be discharged. This prevents encrustation and hardening of the binder.

Entsprechend ist es bevorzugt, als Kühlmittel Wasser einzusetzen. Und es ist zudem in vielen Fällen bevorzugt, dass ein Kühlmittel im Betrieb mit dem Bindemittel aus der Primärdüse austritt.Accordingly, it is preferable to use water as the coolant. And it is also preferred in many cases that a coolant exits the primary nozzle during operation with the binder.

Hier kann man sich beispielsweise eine Zweistoffdüse zum Vorbild nehmen, bei der die Düse für das Bindemittel von einem Ringkanal umgeben ist, durch den kaltes Wasser fließt. Damit wird ein Aushärten des Bindemittels in der Primärdüse vermieden.Here you can, for example, take a two-fluid nozzle as a model, in which the nozzle for the binder is surrounded by a ring channel, flows through the cold water. This prevents hardening of the binder in the primary nozzle.

Dies ist insbesondere dann vorteilhaft, wenn das Bindemittel verdünnt oder noch feiner zerstäubt werden soll.This is particularly advantageous if the binder is to be diluted or even finely atomized.

Die Aufgabe wird hinsichtlich der Vorrichtung zum Beleimen von Partikeln mit den Merkmalen des Anspruchs 5 und insbesondere dadurch gelöst, dass die Primär- und eine Sekundärdüse (Strömungsrichtung (F)) voneinander beabstandet sind und unter unterschiedlichen Winkeln derart eingerichtet sind, dass der Sprühstrahl der Sekundärdüse im Betrieb auf den Sprühstrahl der Primärdüse trifft.The object is achieved in terms of the device for gluing particles with the features of claim 5 and in particular in that the primary and a secondary nozzle (flow direction (F)) are spaced apart and are arranged at different angles such that the spray of the secondary nozzle In operation, it hits the spray jet of the primary nozzle.

Die Vorteile ergeben sich entsprechend der Beschreibung des Verfahrensanspruches.The advantages arise according to the description of the method claim.

Es ist von Vorteil, wenn die Primärdüse nicht bis in das Transportrohr hineinreicht.It is advantageous if the primary nozzle does not reach into the transport tube.

Dadurch wird ein Eindringen von Teilchen aus dem Partikelstrom nahezu vollkommen ausgeschlossen. Zudem ist kein Verschleiß der Düse durch den Partikelstrom im Transportrohr zu erwarten.As a result, penetration of particles from the particle flow is almost completely excluded. In addition, no wear of the nozzle is to be expected by the particle flow in the transport tube.

Es ist bevorzugt, wenn die Ausrichtung der Primärdüse im Wesentlichen senkrecht (d. h. ± 20°) zur Strömungsrichtung ist.It is preferred if the orientation of the primary nozzle is substantially perpendicular (i.e., ± 20 °) to the flow direction.

Auch durch diese Ausrichtung wird ein Eindringen von Fremdkörpern, beispielsweise beim Anfahren, vermieden.Also by this orientation, penetration of foreign bodies, for example when starting, avoided.

Vorzugsweise ist der Sprühstrahl aus der Sekundärdüse fächerförmig.Preferably, the spray from the secondary nozzle is fan-shaped.

Es hat sich herausgestellt, dass die Form eines flachen und fächrigen Sprühstrahls aus der sekundärdüse bewirkt, dass sich das Bindemittel über den ganzen Querschnitt des Transportrohres gleichmäßig verteilen kann.It has been found that the shape of a flat and fan spray from the secondary nozzle causes the binder to spread evenly throughout the cross section of the transport tube.

Es ist von besonderem Vorteil, wenn die Primärdüse eine Kühleinrichtung aufweist.It is of particular advantage if the primary nozzle has a cooling device.

In der Regel ist hier ein Ringkanal um die Primärdüse vorgesehen, durch den als Kühlmittel kaltes Wasser fließen kann. Damit wird vermieden, dass sich die hohen Temperaturen, die in dem Transportrohr herrschen, auf den Düsenkopf der Primärdüse übertragen und Bindemittel aushärten.As a rule, an annular channel is provided around the primary nozzle through which cold water can flow as coolant. This avoids that the high temperatures prevailing in the transport tube, transferred to the nozzle head of the primary nozzle and harden binders.

Für einige Bindemittel ist es vorteilhaft, wenn das Kühlmittel im Betrieb mit dem Bindemittel aus der Primärdüse austritt.For some binders, it is advantageous if the coolant exits the primary nozzle during operation with the binder.

Auf diese Weise kann der Bindemittelsprühstrahl zusätzlich verwirbelt und/oder verdünnt und/oder zerstäubt werden. Man nutzt die Primärdüse in diesem Fall als Zweistoffdüse. Der Ringkanal hat eine oder mehrere Austrittsöffnungen zum Düsenaustritt des Bindemittels hin, in der Regel für Wasser. Außerdem wird so kein separater Rücklauf aus dem Ringkanal notwendig.In this way, the binder spray can additionally be vortexed and / or diluted and / or atomized. In this case, the primary nozzle is used as a two-substance nozzle. The annular channel has one or more outlet openings to the nozzle outlet of the binder out, usually for water. In addition, so no separate return from the annular channel is necessary.

Mit Vorteil ist vorgesehen, wenn eine mit einem Aktuator versehene Nadel in der Primärdüse vorhanden ist.It is advantageously provided that a needle provided with an actuator is present in the primary nozzle.

Diese bewegbare Nadel erlaubt ein Durchstoßen der Austrittsöffnung der Düse für den Fall, dass sich doch noch irgendwelche Stoffe dort festgesetzt haben. Diese Nadel kann in Fällen, in denen das Aussprühen von Bindemitteln unterbrochen werden muss, als Verschlussstopfen an der Austrittsöffnung dienen.This movable needle allows piercing the nozzle orifice in the event that any material has yet settled there. This needle can be used as a stopper at the outlet in cases where the spraying of binders must be interrupted.

Bevorzugt sind die Primärdüse und die Sekundärdüse an einer gemeinsamen Halterung angebracht.Preferably, the primary nozzle and the secondary nozzle are attached to a common holder.

Die Halterung kann dann mit den beiden Düsen an dem Transportrohr lösbar und abdichtend befestigt sein, wenn das Transportrohr die notwendigen Öffnungen für die Sprühstrahlen aufweist. Diese Anordnung ermöglicht bei Wartungsfällen einen raschen Austausch beider Düsen durch ein bereitgestelltes baugleiches Ersatzteil.The holder can then be detachably and sealingly secured to the transport tube with the two nozzles when the transport tube has the necessary openings for the spray jets. This arrangement allows for maintenance cases rapid replacement of both nozzles by a provided identical spare part.

Vorteilhaft sind die Primär- und die Sekundärdüse an einem Endstück des Transportrohres befestigt, welches sich bereits innerhalb eines Trockners befindet.Advantageously, the primary and the secondary nozzle are attached to an end portion of the transport tube, which is already inside a dryer.

Durch den kurzen und insbesondere krümmungslosen Weg bis in den Trockner kann ein Festsetzen des beleimten Materialstroms an der Wandung des Transportrohres vermieden werden.Due to the short and in particular curvilinear way to the dryer, a setting of the glued material flow on the wall of the transport tube can be avoided.

Die Erfindung wird im Folgenden unter Bezugnahme auf die Zeichnungen näher erläutert.The invention will be explained in more detail below with reference to the drawings.

Dabei zeigt Fig. 1 eine schematische, stark vereinfachte und geschnittene Darstellung einer Anlage zur Beleimung und Trocknung von Holzpartikeln.It shows Fig. 1 a schematic, greatly simplified and cut view of a plant for gluing and drying of wood particles.

Fig. 2 stellt in einem Querschnitt durch das Trocknerrohr dar, wie das Transportrohr befestigt ist. Fig. 2 represents in a cross section through the dryer tube, as the transport tube is attached.

Fig. 3 ist eine vergrößerte Schnittdarstellung durch die Vorrichtung zur Beleimung mit Primär- und Sekundärdüse. Fig. 3 is an enlarged sectional view through the device for gluing with primary and secondary nozzle.

Fig. 4 zeigt schematisch die bevorzugte Ausbildung eines Dampfstrahls. Fig. 4 schematically shows the preferred embodiment of a steam jet.

Um die unterschiedlichen Medien besser in den Zeichnungen erkennen und unterscheiden zu können, sind die Bindemittelanteile mit kleinen Kreuzchen gekennzeichnet, Wasser ist gepunktet dargestellt und Dampf durch schwarze Striche symbolisiert. Die Partikelströme 12 mit dem dazugehörenden Trägermedium, der Heizgasstrom 11 und der Gas- und Wasser- und Partikelstrom 20 sind nur durch die entsprechenden Bezugszeichen markiert.In order to better recognize and differentiate the different media in the drawings, the binder components are marked with small crosses, water is shown in dotted lines and steam is symbolized by black lines. The particle streams 12 with the associated carrier medium, the heating gas flow 11 and the gas and water and particle flow 20 are marked only by the corresponding reference numerals.

Fig. 1 zeigt ein gekrümmtes Rohr 19 einer Trocknungseinrichtung 2. In ihm strömen beispielsweise warme und trockene Abgase, sogenannte Heizgase 11 mit sehr hohen Temperaturen. Das gerade Transportrohr 3 ist in der äußeren Krümmung in Rohr 19 eingeführt und mit einem Fixierungsstern 10 zentral gehalten, so dass der über das Transportrohr geführte Gas-, Wasser- und Partikelstrom 20 mittig in den Trockner eintritt. Der Fixierungsstern 10 ist in Fig. 2, die einen Schnitt durch das gekrümmte Rohr 19 und das Transportrohr 4 zeigt, deutlich dargestellt. Fig. 1 shows a curved tube 19 a drying device 2. In him, for example, warm and dry exhaust gases, so-called hot gases 11 flow at very high temperatures. The straight transport tube 3 is in the outer Curvature introduced into tube 19 and held centrally with a fixing star 10, so that the guided over the transport tube gas, water and particle stream 20 enters the center of the dryer. The fixation star 10 is in Fig. 2 showing a section through the curved tube 19 and the transport tube 4, clearly shown.

Auf dem Transportrohr 4 ist die Halterung 6 für die Primärdüse 4 und die Sekundärdüse 5 angebracht. Die kreisförmig gestrichelt umrandete Primär- und Sekundärdüse werden in der Beschreibung zu Fig. 3 als erfindungswesentlicher Gegenstand näher erläutert. In den Figuren 1 und 2 sind außerdem die Zuleitungen zu den Düsen angedeutet. Es handelt sich um die Bindemittelzufuhr 7 und die Wasserzufuhr 8 zur Primärdüse 4 und die Dampfzufuhr 9 zur Sekundärdüse 5, wobei die Sekundärdüse alternativ aber auch mit Pressluft oder Wasser betrieben werden könnte. Eine solche Zufuhr (7, 8, 9) wird in der Regel durch Rohrleitungen oder Schläuche realisiert.On the transport pipe 4, the holder 6 for the primary nozzle 4 and the secondary nozzle 5 is mounted. The circular dashed outlined primary and secondary nozzle are in the description to Fig. 3 explained as subject matter essential to the invention. In the FIGS. 1 and 2 In addition, the supply lines to the nozzles are indicated. It is the binder feed 7 and the water supply 8 to the primary nozzle 4 and the steam supply 9 to the secondary nozzle 5, wherein the secondary nozzle could alternatively be operated with compressed air or water. Such a supply (7, 8, 9) is usually realized by pipes or hoses.

Fig. 3 zeigt in vergrößerter und geschnittener Darstellung die Vorrichtung 1 zum Beleimen des Holzpartikelstroms 12 mit der Halterung 6 für die Primärdüse 4und die Sekundärdüse 5, die in Fig. 1 gestrichelt eingekreist ist. Die Düsen 5 und 6 sind geschnitten dargestellt. Die Primärdüse 4 weist die Düsenöffnung 21.1, die Sekundärdüse 5 die Düsenöffnung 21.2 auf. Fig. 3 shows in enlarged and sectional view the device 1 for gluing the wood particle stream 12 with the holder 6 for the primary nozzle 4 and the secondary nozzle 5, which in Fig. 1 circled dashed. The nozzles 5 and 6 are shown cut. The primary nozzle 4 has the nozzle opening 21.1, the secondary nozzle 5 the nozzle opening 21.2.

Die Primärdüse 4 steht im rechten Winkel zum Partikelstrom 12. Sie sprüht Bindemittel, beispielsweise Isocyanat, in das Transportrohr 4, reicht aber nicht in das Rohr hinein. Dadurch wird erstens ein Abrieb durch den Partikelstrom und andererseits ein Eintreten von Teilchen in die Düse vermieden. In dem zentralen Bindemittelkanal 15 der zum Austritt aus der Primärdüse 4 führt, ist einen Nadel 17 dargestellt, die über einen nicht dargestellten Aktivator bewegbar ist. So kann der Austritt abgeriegelt und/oder gereinigt werden. Wegen der Gefahr der Aushärtung des Bindemittels bei hohen Temperaturen, die im unmittelbar angrenzenden Transportrohr 4 vorhanden sind, ist um den Bindemittelkanal 15 ein Ringkanal 16 angeordnet, der mit dem Durchfluss eines Kühlmediums, in diesem Fall Wasser, bis hinunter zum Austritt 21.1 als Kühleinrichtung dient. In dem dargestellten Ausführungsbeispiel tritt das Wasser mit dem Bindemittel aus der Primärdüse 4 aus. Das Bindemittel kann auf diese Weise besser zerstäubt und gekühlt werden, denn im Transportrohr wird der Partikelstrom häufig durch das Trägermedium Wasserdampf mitgerissen. Dieser ist heiß und würde das Bindemittel zu früh, also noch vor dem Austritt aus dem Transportrohr 4 aushärten. Der Austritt des Wassers aus der Primärdüse 4 ist aber nicht ausschlaggebend für die Erfindung und das Kühlmittel kann auch anderweitig abgeführt werden.The primary nozzle 4 is at right angles to the particle flow 12. It sprays binder, for example isocyanate, into the transport tube 4, but does not reach into the tube. As a result, first, abrasion by the particle flow and, secondly, the entry of particles into the nozzle are avoided. In the central binder channel 15 which leads to the exit from the primary nozzle 4, a needle 17 is shown, which is movable via an activator, not shown. Thus, the outlet can be sealed off and / or cleaned. Because of the risk of curing of the binder at high temperatures, which are present in the immediately adjacent transport pipe 4, an annular channel 16 is arranged around the binder channel 15, which serves with the flow of a cooling medium, in this case water, down to the outlet 21.1 as a cooling device , In the illustrated embodiment, the water exits the primary nozzle 4 with the binder. The binder can be better atomized and cooled in this way, because in the transport tube, the particle flow is often entrained by the carrier medium water vapor. This is hot and would cure the binder too early, so even before leaving the transport tube 4. However, the exit of the water from the primary nozzle 4 is not decisive for the invention and the coolant can also be removed elsewhere.

Mit Hilfe der zweiten separaten und leicht beabstandeten Sekundärdüse 5, die in diesem Beispiel unter 45° gegen die Strömungsrichtung F angeordnet ist, wird Dampf durch den Dampfkanal 18 gegen den austretenden Bindemittel-/Wasser-Sprühstrahl 14 gesprüht. Der Winkel zwischen dem Bindemittel-Sprühstrahl 14 und dem Dampf-Sprühstrahl 13 ist von vielen Faktoren abhängig und kann in Versuchen oder mittels Berechnungen fest eingestellt werden. In einer angedachten besonders komfortablen Ausführung der Erfindung ist auch vorgesehen den Winkel über Motoren oder Aktuatoren einstellbar zu machen. In jedem Fall sollte er zwischen 10 und 80° liegen.With the help of the second separate and slightly spaced secondary nozzle 5, which is arranged in this example at 45 ° to the flow direction F, steam is sprayed through the steam channel 18 against the exiting binder / water spray jet 14. The angle between the binder spray 14 and the steam jet 13 depends on many factors and can be fixed in experiments or calculations. In an intended particularly comfortable embodiment of the invention is also provided to make the angle adjustable via motors or actuators. In any case, it should be between 10 and 80 °.

Das Auftreffen des Dampf-Sprühstrahls 13 auf den austretenden Bindemittel-/Wasser-Sprühstrahl 14 hat zur Folge, dass der Bindemittel-/Wasser-Sprühstrahl 14 nicht unmittelbar durch die Partikelströmung, die etwa 250 m/s Geschwindigkeit aufweisen kann, wieder an die Wandung des Transportrohres gelenkt wird und dort "anbackt". Vielmehr bewirkt der Dampfstrahl oder ggf. auch ein Wasserstrahl 13 aus der Sekundärdüse 5, dass sich das Bindemittel sehr gleichmäßig über den Transportrohrquerschnitt verteilt und alle Holzpartikel benetzen kann.The impact of the steam jet 13 on the exiting binder / water spray 14 has the consequence that the binder / water spray jet 14 is not directly back to the wall by the particle flow, which may have about 250 m / s speed of the transport tube is steered and "caked" there. Rather, causes the steam jet or possibly also a water jet 13 from the secondary nozzle 5, that the binder distributed evenly over the transport pipe cross-section and can wet all wood particles.

In Fig. 4 ist angedeutet, dass die favorisierte Ausbildung des Dampfstahls 13 flach und fächerförmig ist.In Fig. 4 is indicated that the favored design of the steam steel 13 is flat and fan-shaped.

Bei einer kurzen Produktionsunterbrechung werden geringere Mengen von Wasser und Dampf dosiert. Hiermit ist gewährleistet, dass die Düsen 4, 5 nicht verstopfen und dass der Leim in der Zuleitung nicht aushärtet.With a short interruption in production, smaller amounts of water and steam are metered. This ensures that the nozzles 4, 5 do not clog and that the glue does not harden in the supply line.

Die Primärdüse 4 ist so ausgeführt dass sie ohne großen Aufwand aus der Halterung 6 zur Wartung gezogen werden kann.The primary nozzle 4 is designed so that it can be pulled without great effort from the holder 6 for maintenance.

Bezugszeichen:Reference numerals:

11
Vorrichtung zum Beleimen von PartikelnDevice for gluing particles
22
Trocknerdryer
33
Transportrohrtransport pipe
44
Primärdüseprimary nozzle
55
Sekundärdüsesecondary nozzle
66
Halterungbracket
77
Bindemittelzufuhrbinder supply
88th
Wasserzufuhrwater supply
99
Dampfzufuhrsteam supply
1010
Fixierungssternfixation star
1111
Heizgasstromheating gas
1212
Partikelstromparticle stream
1313
Dampf- und/oder WasserstrahlSteam and / or water jet
1414
Bindemittel-/Wasser-SprühstrahlBinder / water spray
1515
Bindemittelkanalbinder channel
1616
Ringkanal, KühleinrichtungRing channel, cooling device
1717
Nadelneedle
1818
Dampfkanalvapor channel
1919
Gekrümmtes RohrCurved pipe
2020
Gas-, Wasser- und PartikelstromGas, water and particle flow
21.1, 21.221.1, 21.2
Düsenöffnungnozzle opening
FF
Strömungsrichtungflow direction
A, BA, B
Ansichten zu Fig. 2 und Fig. 4 Views too 2 and FIG. 4

Claims (13)

Verfahren zur Beleimung von Partikeln, wobei die Partikel in einem Transportrohr (3) in einer Strömungsrichtung (F) mittels eines Trägermediums transportiert werden, wobei mit wenigstens einer Primärdüse (4) ein Bindemittel in das Transportrohr (3) einspritzt wird und wobei mit Hilfe wenigstens einer zweiten Düse zur Einspritzung von Pressluft und/oder Wasser und/oder Dampf dem eingespritzten Bindemittel eine Strömungsrichtung vorgegeben und/oder es zerstäubt wird, dadurch gekennzeichnet, dass der Bindemittel-Sprühstrahl (14) des in Strömungsrichtung (F) hinter dem Austritt aus der Primärdüse (4) von einem Pressluft- und/oder Dampf- und/oder Wasserstrahl (13) aus einer von der Primärdüse (4) beabstandeten Sekundärdüse (5) getroffen und abgelenkt wird.Process for the gluing of particles, wherein the particles are transported in a transport tube (3) in a flow direction (F) by means of a carrier medium, wherein with at least one primary nozzle (4) a binder is injected into the transport tube (3) and by means of at least a second nozzle for the injection of compressed air and / or water and / or steam the injected binder a flow direction predetermined and / or it is atomized, characterized in that the binder spray jet (14) in the flow direction (F) behind the exit from the Primary nozzle (4) from a compressed air and / or steam and / or water jet (13) from a primary nozzle (4) spaced secondary nozzle (5) is met and deflected. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass ein Winkel von 10 bis 80° zwischen dem Bindemittel-Sprühstrahl (14) der Primärdüse (4) und dem Pressluft- und/oder Dampf- und/oder Wasserstrahl (13) der Sekundärdüse (5) eingestellt wird.A method according to claim 1, characterized in that an angle of 10 to 80 ° between the binder spray jet (14) of the primary nozzle (4) and the compressed air and / or steam and / or water jet (13) of the secondary nozzle (5). is set. Verfahren gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Primärdüse (4) bis hin zur Austrittsöffnung (21.1) gekühlt wird.A method according to claim 1 or 2, characterized in that the primary nozzle (4) is cooled up to the outlet opening (21.1). Verfahren gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass ein Kühlmittel im Betrieb mit dem Bindemittel aus der Primärdüse (4) austritt.Method according to one of claims 1 to 3, characterized in that a coolant exits during operation with the binder from the primary nozzle (4). Vorrichtung zum Beleimen von Partikeln mit einem Transportrohr (3), in dem die Partikel in einer Strömungsrichtung (F) mittels eines Trägermediums transportiert werden, wenigstens einer Primärdüse (4), die ein Bindemittel in das Transportrohr einspritzt und wenigstens einer zweiten Düse zur Einspritzung von Pressluft und/oder Wasser und/oder Dampf, um dem Bindemittel eine Strömungsrichtung vorzugeben und/oder es zu zerstäuben dadurch gekennzeichnet, dass die Primärdüse (4) und eine Sekundärdüse (5) voneinander beabstandet sind und unter unterschiedlichen Winkeln derart eingerichtet sind, dass der Sprühstrahl der Sekundärdüse im Betrieb auf den Sprühstrahl der Primärdüse trifft.Device for gluing particles with a transport tube (3), in which the particles are transported in a flow direction (F) by means of a carrier medium, at least one primary nozzle (4) which injects a binder into the transport tube and at least one second nozzle for injection of Compressed air and / or water and / or steam to the Binder to specify a flow direction and / or atomize it, characterized in that the primary nozzle (4) and a secondary nozzle (5) are spaced apart and are arranged at different angles such that the spray jet of the secondary nozzle in operation impinges on the spray jet of the primary nozzle. Vorrichtung gemäß Anspruch 5, dadurch gekennzeichnet, dass die Primärdüse (4) nicht bis in das Transportrohr (3) hineinreicht.Apparatus according to claim 5, characterized in that the primary nozzle (4) does not extend into the transport tube (3). Vorrichtung gemäß Anspruch 5 oder 6, dadurch gekennzeichnet, dass die Ausrichtung der Primärdüse (4) im Wesentlichen senkrecht zur Strömungsrichtung (F) ist.Apparatus according to claim 5 or 6, characterized in that the orientation of the primary nozzle (4) is substantially perpendicular to the flow direction (F). Vorrichtung gemäß einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass der Sprühstrahl (13) aus der Sekundärdüse (5) fächerförmig ist.Device according to one of claims 5 to 7, characterized in that the spray jet (13) from the secondary nozzle (5) is fan-shaped. Vorrichtung gemäß einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass die Primärdüse (4) eine Kühleinrichtung (16) aufweist.Device according to one of claims 5 to 8, characterized in that the primary nozzle (4) has a cooling device (16). Vorrichtung gemäß einem der Ansprüche 5 bis 9, dadurch gekennzeichnet, dass ein Kühlmittel im Betrieb mit dem Bindemittel aus der Primärdüse austritt.Device according to one of claims 5 to 9, characterized in that a coolant exits during operation with the binder from the primary nozzle. Vorrichtung gemäß einem der Ansprüche 5 bis 10, dadurch gekennzeichnet dass eine mit einem Aktuator versehene Nadel in der Primärdüse vorhanden ist.Device according to one of claims 5 to 10, characterized in that a provided with an actuator needle is present in the primary nozzle. Vorrichtung gemäß einem der Ansprüche 5 bis 11, dadurch gekennzeichnet, dass die Primärdüse und die Sekundärdüse an einer gemeinsamen Halterung angebracht sind.Device according to one of claims 5 to 11, characterized in that the primary nozzle and the secondary nozzle are mounted on a common holder. Vorrichtung gemäß Anspruch 12, dadurch gekennzeichnet, dass die Primär-und die Sekundärdüse an einem Endstück des Transportrohres befestigt sind, welches sich bereits innerhalb eines Trockners befindet.Apparatus according to claim 12, characterized in that the primary and the secondary nozzle are attached to an end portion of the transport tube, which is already inside a dryer.
EP17195034.8A 2016-11-10 2017-10-05 Device and method for glueing particles Active EP3323501B1 (en)

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DE102016013435.6A DE102016013435B4 (en) 2016-11-10 2016-11-10 Device and method for gluing particles

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JP2001293704A (en) * 2000-04-11 2001-10-23 Nippon Polyurethane Ind Co Ltd Apparatus and method for manufacturing woody board
DE202008015419U1 (en) * 2008-11-21 2010-04-22 Epple, Albrecht, Dr. Device for gluing fibers in a blowpipe
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CN108067370B (en) 2021-06-04
EP3323501B1 (en) 2019-08-21
DE102016013435A1 (en) 2018-05-17
CN108067370A (en) 2018-05-25

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