EP3192626B1 - Procede de traitement de copeaux de bois et installation associee - Google Patents

Procede de traitement de copeaux de bois et installation associee Download PDF

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Publication number
EP3192626B1
EP3192626B1 EP16150920.3A EP16150920A EP3192626B1 EP 3192626 B1 EP3192626 B1 EP 3192626B1 EP 16150920 A EP16150920 A EP 16150920A EP 3192626 B1 EP3192626 B1 EP 3192626B1
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Prior art keywords
wood
dust
washing
fibres
process according
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EP16150920.3A
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German (de)
English (en)
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EP3192626A1 (fr
Inventor
Stefan SCHLÄFKE
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Swiss Krono Tec AG
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Swiss Krono Tec AG
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Priority to EP16150920.3A priority Critical patent/EP3192626B1/fr
Priority to PL16150920T priority patent/PL3192626T3/pl
Publication of EP3192626A1 publication Critical patent/EP3192626A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • 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
    • B27N9/00—Arrangements for fireproofing

Definitions

  • the present invention relates to a process for producing wood fiber insulation mats according to the preamble of claim 1, a device for washing wood dust according to claim 12 and a plant for the production of wood fiber insulation mats comprising such a device according to claim 15.
  • wood fiber insulating materials are enjoying increasing popularity, for example as Gefachdämmung, interior insulation when building a house or as impact sound-reducing layer between floor slab and flooring.
  • the wood fibers used for the production of wood fiber insulating materials are obtained from wood chips in a defibration process (e.g., in a refiner).
  • the wood fibers produced with such a defibration process have a length between 1.5 mm and 20 mm and a thickness between 0.05 mm and 1 mm.
  • the wood fibers are dried, mixed with a suitable binder, the wood fiber binder mixture is then placed on a nonwoven on a conveyor belt, compacted into mats and the compacted mats cut and packaged.
  • the composition of the wood dust varies depending on the process step.
  • the wood dusts occurring during drying, mixing, web formation and compaction predominantly contain fiber-containing dusts, while the wood dust developing in the fabrication step of the wood fiber mats consists primarily of fine dust particles.
  • Such wood dust can have health effects for the persons coming into contact with it.
  • a significant portion of the wood dust deposited in the nasal cavity and in the downstream airways which can lead to cancer of the affected tissues in the worst case. Accordingly, it is necessary to dissipate these dusts directly in the individual process steps and to dispose of them in a suitable manner.
  • a problem in the combustion of the wood dusts arises when fire-resistant substances are added to the wood fiber insulation in the manufacturing process. These are also found in appropriate concentrations in the wood dusts and provide in the energy system for a lower calorific value. This in turn means that more energy (e.g., gas) is needed to reach and maintain the appropriate temperature in the combustion chamber.
  • the dusts containing fire-retardant ensure improper combustion and thus lead to increased emission of emissions.
  • this unclean combustion seems to be the cause of increased deposition of silicates in the burner chamber, which must be removed regularly with a considerable cost factor.
  • the JP H0625481A relates to a method for producing a wood substitute by press molding a mixture of resin and wood dust, wherein the wood dust is washed at the beginning of the manufacturing process, inter alia.
  • the EP2398958 B1 discloses a device according to the preamble of claim 12.
  • the present invention is therefore based on the technical object of utilizing the wood dusts occurring in the production of wood fiber insulating materials more economically and ecologically better.
  • a method of treating wood dust obtained in the process of making wood fiber insulation mats in at least one process step after defibering the wood chips to wood fibers is provided, wherein the wood dust is subjected to at least one washing step.
  • the present process thus makes it possible to provide a wood dust washed with a suitable detergent, to which additives (such as flame retardants) which oppose cost-effective combustion have been removed by the washing step.
  • additives such as flame retardants
  • the calorific value in the energy system is increased and simultaneously Energy costs and emissions lowered.
  • the detergent contained in the additive can be recycled to the manufacturing process, whereby an additional saving in the amount of additive used, for example flame retardant amount is possible.
  • wastewater accumulating in the production process of the wood fiber insulating mats as a washing agent to the washing step.
  • At least one aqueous solvent in particular water
  • the aqueous detergent should in particular allow a dissolution of water-soluble additives in particular from the wood dust.
  • the pH of the aqueous detergent can be adjusted as desired, depending on the additive to be washed, wherein a pH in the range between 5 and 8, preferably 7 is desirable.
  • the temperature of the aqueous detergent can be adjusted according to requirements.
  • the temperature of the aqueous detergent may be between 20 ° C and 60 ° C, preferably between 25 ° C and 50 ° C.
  • the temperature of the aqueous detergent not only has an influence on the dissolving behavior of the additive but also on the soaking behavior of the wood dusts. It has been shown that especially fibrous wood dust can be soaked faster in warm water than in cold water.
  • At least one condensate produced in the drying process of the wood fiber is used as a scrubbing agent for the wood dust in the at least one washing step.
  • the condensate already has a higher pH than fresh water, preferably a pH above 9. Also contained in the condensate during the defibration process and subsequent drying process from the wood dissolved oils and resins, due to the recycling or The reuse of the condensate as washing water during the washing step to attach to the wood fiber and can accelerate fire in the energy system.
  • water-soluble additives which have been added to the wood fibers in the production process of the wood-fiber insulating mats can be removed from the wood dust.
  • the water-soluble additives to be removed from the wood dust are selected from a group containing flame retardants, especially inorganic flame retardants, fungicides such as e.g. Polyamines or VOC reducing agents, e.g. silane-containing compounds or polyamines selected.
  • flame retardants especially inorganic flame retardants, fungicides such as e.g. Polyamines or VOC reducing agents, e.g. silane-containing compounds or polyamines selected.
  • the water-soluble additives include phosphate or borate-containing flame retardants, preferably ammonium polyphosphate, tris (tri-bromneopentyl) phosphate, zinc borate or boric acid complexes of polyhydric alcohols.
  • phosphate or borate-containing flame retardants preferably ammonium polyphosphate, tris (tri-bromneopentyl) phosphate, zinc borate or boric acid complexes of polyhydric alcohols.
  • Ammonium phosphates or ammonium polyphosphates are very particularly preferred.
  • the at least one ammonium phosphate is selected from the group consisting of triammonium phosphate (NH 4 ) 3 P 3 O 4 , diammonium phosphate (NH 4 ) 2 HP 3 O 4 . Monoammonium phosphate (NH 4 ) H 2 P 3 O 4 and ammonium polyphosphate [NH 4 PO 3 ] n .
  • a mixture of different ammonium phosphates can also be used. For example, a mixture of tri-ammonium phosphate (NH 4 ) 3 P 3 O 4 and ammonium polyphosphate [NH 4 PO 3 ] n is conceivable.
  • polyphosphates are condensation products of orthophosphoric acid salts (H 3 PO 4 ) having the general molecular formula M ' n + 2 P n O 3n + 1 and the structure M'-O- [P (OM') (O) -O] n -M ', where M' may be a monovalent metal or, as presently, an ammonium cation NH 4 + .
  • the polyphosphates are very often also the short chain (ie actually oligo -) counted phosphates.
  • the degree of polymerization n of the polyphosphates can be up to several thousand. In the present case, the degree of polymerization n of the ammonium polyphosphates used is greater than 10, preferably greater than 15.
  • the washed wood dust resulting from the at least one washing step is separated from the wash water using suitable means, such as pellet presses, briquette presses, filters or press screw separators.
  • suitable means such as pellet presses, briquette presses, filters or press screw separators.
  • a screw such as a screw has proven.
  • the separated wood dust can then be supplied for further use.
  • the separated, washed wood dust is burned in an energy plant to produce energy and / or heat, which is useful in the production process of wood fiber insulation mats.
  • the energy generated in the energy plant is preferably used for power generation.
  • the electricity is then fed back into the grid of the grid operator and compensated accordingly.
  • the washing water resulting after the at least one washing step is returned to the production process of the wood-fiber insulating mat. Accordingly, the present method opens up the possibility of washing water, which contains at least one flame retardant and possibly other largely water-soluble additives (fungicides, etc.) to be reintroduced into the production process of the wood fiber insulation mat.
  • the washing water after the defibering step and before the drying step of the wood fibers is returned to the manufacturing process of the wood fiber insulating mat.
  • At least one additive in particular at least one flame retardant, such as ammonium phosphate, is added to the wash water before it is returned to the production process.
  • at least one flame retardant such as ammonium phosphate
  • the wash water already contains the additive e.g. contains the flame retardant
  • the necessary for the manufacturing process additive concentration can be effected by repeated introduction into the production process and separation.
  • the wood dust to be washed can be produced in different process steps during the wood fiber insulation production.
  • the wood dust to be washed falls in at least one drying step of the wood fibers, while the mixture of the wood fibers with binder fibers, while the fleece formation of wood fibers and binder fibers the compression of the nonwoven and / or during the assembly of the compacted wood fiber insulation mat on.
  • the defibration process of the (moist) woodchips in a refiner is followed by the drying process of the wood fibers.
  • the wood fibers are mixed or contacted with the at least one additive, in particular the at least one flame retardant.
  • the at least one additive in particular the at least one flame retardant.
  • the additive is used in an amount between 1 and 20% by weight, preferably 5 and 15% by weight.
  • the dried wood fibers provided with the additive are then sorted according to their size and preferably stored temporarily, for example in silos or bunkers.
  • the with the additive e.g. the flame retardant mixed or mixed wood fibers are mixed with binder fibers following.
  • the binder fibers are typically plastic fibers that are in the form of monocomponent fibers or bicomponent fibers.
  • the mixing of the wood fibers with such binder fibers is preferably carried out in a blown line before the web formation, as will be described in detail below.
  • monocomponent fibers are preferably made of polyethylene or other low melting point plastics.
  • Bicomponent fibers typically consist of a support filament or a core fiber of a higher temperature resistant plastic material, especially polypropylene, which is sheathed or encased in a plastic having a lower melting point, in particular polyethylene.
  • the shell or the jacket allows melting of the wood fibers after melting.
  • the fiber mixture used to make the wood fiber insulating mat may comprise 60 to 90% by weight, preferably 70 to 80% by weight of wood fibers and 5 to 20% by weight, preferably 10 to 15% by weight of binder fibers.
  • the binder fibers are provided from bale openers and the necessary amount of binder fibers determined.
  • the binder fibers are applied with the wood fibers on a first conveyor belt to form a Vorvlieses, in particular inflated.
  • the wood fibers and the binder fibers can be guided over a blow pipe and inflated onto a first conveyor belt.
  • blowpipe intensive mixing of wood fibers and binder fibers and optionally other components is carried out by the injected air as a means of transport.
  • the amount of supplied fiber mixture depends on the desired layer thickness and the desired bulk density of the wood fiber mat to be produced.
  • thermally activatable plastic granules After depositing the mixture of wood fibers and binder fibers and, if appropriate, further components on the first conveyor belt, further components, such as e.g. a thermally activatable plastic granules are sprinkled onto the formed fleece.
  • the thermally activatable plastic granules can be added in amounts of 5-45% by weight, preferably in amounts of 10-40% by weight, particularly preferably in amounts of 20-30% by weight, based on the particular fiber mixture used.
  • Well suited as plastic granules are those incurred in the recycling of plastic articles from the dual system.
  • the pre-fleece deposited on the first conveyor belt is defibered, mixed and the fiber mixture is applied to a second conveyor belt to form a fiber cake.
  • the thickness of the obtained fiber cake or mat is adjusted by the rotational speed of the second conveyor belt.
  • the fiber cake is subsequently heated and compacted, the temperatures used for this purpose being between 100 ° C. and 250 ° C., preferably 130 ° C. and 220 ° C., in particular at 200 ° C.
  • the temperatures used for this purpose being between 100 ° C. and 250 ° C., preferably 130 ° C. and 220 ° C., in particular at 200 ° C.
  • the fiber mat is finally reduced to the desired dimensions and cooled; the cooling preferably takes place during the calibration and in the cooling zone of the continuous furnace.
  • the dusts occurring during these individual process steps are each introduced separately into corresponding filter devices.
  • the wood dusts accumulating during the drying process of the wood fibers (which contain predominantly wood fiber components) are introduced into a dryer filter associated with the drying device.
  • the wood dusts (consisting of wood fiber and binder fibers) produced during the mixing of wood fibers and binder fibers and the subsequent multi-stage web formation and the compression process are passed through a production filter.
  • the (very finely divided) wood dusts accumulating during assembly (blank and packaging) are sucked through a saw filter.
  • the filtered wood dusts are then removed in a suitable collection device, e.g. a silo, collected and stored temporarily, before the wood dust is subjected to the washing process. It is also conceivable and possible for the wood dusts to be stored according to their composition (predominantly fibrous or finely particulate dusts) and to be further treated in separate washing processes.
  • a suitable collection device e.g. a silo
  • the washing step of the wood dusts is carried out in a device e.g. a container is carried out, the at least one inlet for the wood dust (eg in the form of trough slugs connected to the silo), at least one inlet - which is inventively in the form of nozzles - for at least one aqueous detergent, at least one outlet for the washing water and at least includes an outlet for the washed wood dust.
  • a device e.g. a container is carried out, the at least one inlet for the wood dust (eg in the form of trough slugs connected to the silo), at least one inlet - which is inventively in the form of nozzles - for at least one aqueous detergent, at least one outlet for the washing water and at least includes an outlet for the washed wood dust.
  • the present washing device also comprises at least one means for separating the washed wood dust from the washing water, wherein the at least one separating means causes a squeezing out of the washing water from the washed wood dust.
  • the at least one outlet for the washing water and the at least one outlet for the washed wood dust are provided at opposite ends of the at least one separating means.
  • the at least one separation means is in the form of a screw (so-called press screw separator).
  • a screw to separate the washed wood dust from the detergent or washing water results in the formation of a plug of pressed or pre-pressed wood dust at or in front of the outlet, which effects a watertight closure of the wood dust outlet.
  • further squeezing out of the scrubbing powder from the wood dust is accomplished by at least one counter-holding means against the at least one outlet effected for the washed wood dust forming plug.
  • This counteracting means also referred to as an anvil
  • This counteracting means is preferably cone-shaped and / or spring-loaded.
  • the washing device described is part of a plant for the production of wood fiber insulation mats.
  • the present plant for the production of wood fiber insulation mats comprises at least one dryer for wood fiber drying, at least one device for mixing wood fibers and binder fibers, at least one device for web formation of wood fibers and binder fibers, at least one device for nonwoven densification and / or at least one device for packaging the compacted Wood fiber mat, and at least one silo for collecting the accumulating in at least one of these devices wood dust.
  • the at least one wood dust washing device is provided downstream of the at least one silo.
  • the silo is preceded by at least one filter, preferably at least three filters for separating the wood dust from the drying air of the dryer, the mixing and web-forming device, the compacting device (e.g., oven) and / or the packaging device.
  • at least one filter dryer filter
  • at least one filter is associated with the dryer, at least one filter (production filter) of the mixing, web formation and compression device and at least one filter (saw filter) of the clothing device.
  • the at least one washing device is coupled to at least one system for energy and heat production.
  • the washed wood dust separated in the washing device is introduced into the energy plant for combustion.
  • the at least one washing device with a discharge for the washing water in the order or entry device for the at least one additive, in particular flame retardants, coupled in the wood fiber stream.
  • the washing water leaving the washing device, which contains the washed-out additive is correspondingly mixed with the wood fibers or applied to the wood fibers.
  • the washed-out additive e.g., flame retardant
  • the present system further comprises at least one means for removing the accumulated in the wood fiber dryer condensate, which at least partially as a washing water into which at least one washing device can be introduced.
  • Another part of the condensate can also be conventionally mixed directly with an additive, in particular a flame retardant, and introduced into the wood fiber stream leaving the refiner.
  • FIG. 1 Shown embodiment of the method according to the invention describes the individual process steps beginning with the provision of the wood starting product to the finished wood fiber insulation mat.
  • step 1 suitable wood starting material for producing the woodchips is first provided.
  • wood source material all conifers, hardwoods or mixtures thereof are suitable.
  • step 2 the wood fibers are subjected to the defibering process in a refiner (step 2), during which process a suitable wetting agent is optionally added to the wood fibers during the defibering process.
  • the wood fibers can be mixed with a flame retardant immediately after fiber pulping (step 3).
  • the contacting of the wood fibers with the flame retardant can be carried out at this stage of the process, for example in a blowline process.
  • step 4 a drying process of the wood fibers mixed with the flame retardant (step 4), wherein this drying process can take place in two stages I, II.
  • the dryer is designed as a 2-stage dryer, with the main drying in stage 1 being done by means of hot gases (air or superheated steam) and after-drying in stage 2, where it is also possible to use hot air or superheated steam.
  • the mixture of substances is separated in / after each stage by means of separation cyclone and capsule units (not shown).
  • the dried wood fibers are sorted according to their size (not shown) and stored in suitable storage containers (for example silo or bunker) (not shown).
  • the wood fibers are mixed with bicomponent fibers as binder fibers (step 5).
  • the bicomponent fibers are provided from bale openers and determines the necessary amount of bicomponent fibers.
  • the fleece is re-fiberized at the end of the first conveyor belt, mixed and applied the fiber mixture on a second conveyor belt to form a fiber cake.
  • the combination of the formation of a pre-batt with re-fiberization is also known as an air-lay process (step 6).
  • the fiber cake is then compacted at a temperature of about 200 ° C (step 7) and adjusted to the desired thickness.
  • hot air flows through the fiber cake and there is an activation of the binding fibers in the wood fiber mat, so that the heated and melted binding fibers connect with the wood fibers.
  • the wood fiber mat obtained is suitably assembled (step 8).
  • the dusts occurring during these individual process steps are each introduced separately into corresponding filter devices.
  • the wood dusts accumulating during the drying process of the wood fibers are introduced into a dryer filter associated with the drying device (step 9).
  • the wood dusts (consisting of wood fiber and binder fibers) produced during the mixing of wood fibers and binder fibers and the subsequent multi-stage web formation and the compression process are passed through a production filter (step 10).
  • the during the Packaging (blank and packaging) (very finely divided) wood dusts are sucked through a saw filter (step 11).
  • the filtered wood dusts are then removed in a suitable collection device, e.g. a silo (12), collected and stored temporarily, before the wood dust is subjected to the washing process.
  • a suitable collection device e.g. a silo (12)
  • the washing step of the wood dusts and the separation of the washed wood dust from the washing water are carried out in a washing device 13 (see also the description of the FIG. 2 ).
  • the washing device 13 is coupled to at least one plant for energy and heat generation.
  • the washed wood dust separated in the washing apparatus is introduced into the power plant 13a for combustion.
  • the flame retardant contained in the wood dust is washed out and returned with the washing water back into the order or entry device for the flame retardant in the refiner 2 abandoned wood fiber stream.
  • FIG. 2 shows an embodiment of the washing device 13 in the form of a container with an inlet for the wood dust 14, which is in the form of trough screws coupled to the dust silo 12, and a plurality of detergent inlet nozzles 15, the inlets 14, 15 respectively on the top side of the container are arranged.
  • the container 13 has a certain level of detergent, which also makes it possible to determine certain properties of the washing water which define the dissolving behavior, such as pH and conductance, by means of suitable sensors.
  • the sensors for determining the pH 16 and the conductance 17 are provided in the lower area of the container near the outlets.
  • a separating means 18 in the form of a press screw is provided in the lower region of the container 13.
  • the separated from the wood dust wash water is returned via the outlet 19 coupled with drain valve, filter and pump to the entry device 3 for the flame retardant solution in the refiner 2 abandoned wood fiber.
  • the conductance of the brine against the water supplied increased sharply already after 30 seconds, which indicates a detachment of the ammonium phosphate from the wood fibers. Accordingly, the ammonium phosphate is already after a short time Dissolution time dissolved out of the wood dust and an extension of the treatment time has only a small effect.

Claims (15)

  1. Procédé servant à fabriquer des panneaux isolants à base de fibres de bois, caractérisé en ce que la poussière de bois engendrée dans le processus de fabrication des panneaux isolants à base de fibres de bois lors d'au moins une étape de procédé après le défibrage des copeaux de bois pour donner des fibres de bois est soumise à au moins une étape de lavage.
  2. Procédé selon la revendication 1, caractérisé en ce qu'au moins un solvant aqueux, en particulier de l'eau, est utilisé en tant que produit de lavage pour la poussière de bois dans l'au moins une étape de lavage.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'au moins un produit de condensation engendré dans le processus de séchage des fibres de bois est utilisé en tant que produit de lavage pour la poussière de bois dans l'au moins une étape de lavage.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que des additifs solubles dans l'eau, qui ont été mélangés aux fibres de bois dans le processus de fabrication des panneaux isolants à base de fibres de bois, sont supprimés de la poussière de bois dans l'au moins une étape de lavage.
  5. Procédé selon la revendication 4, caractérisé en ce que les additifs solubles dans l'eau sont choisis parmi un groupe contenant des produits retardateurs de flammes, en particulier des produits retardateurs de flammes inorganiques, des fongicides ou des produits réduisant les COV.
  6. Procédé selon la revendication 4 ou 5, caractérisé en ce que les additifs solubles dans l'eau comprennent des produits retardateurs de flammes contenant du phosphate ou du borate, de manière préférée du polyphosphate d'ammonium, du trisphosphate (tri-bromonéopentyle), du borate de zinc ou des complexes d'acide borique d'alcools polyvalents.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la poussière de bois lavée engendrée après l'au moins une étape de lavage est isolée de l'eau de lavage, en particulier en utilisant des presses à granules, des presses à briquettes, des filtres ou des séparateurs à vis de presse.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'eau de lavage engendrée après l'au moins une étape de lavage est ramenée dans le processus de fabrication du panneau isolant à base de fibres de bois.
  9. Procédé selon la revendication 8, caractérisé en ce que l'eau de lavage est ramenée, après l'étape de défibrage et avant l'étape de séchage des fibres de bois, dans le processus de fabrication du panneau isolant à base de fibres de bois.
  10. Procédé selon la revendication 8 ou 9, caractérisé en ce qu'au moins un additif, en particulier au moins un produit retardateur de flammes tel que du phosphate d'ammonium, est ajouté à l'eau de lavage avant le renvoi dans le processus de fabrication.
  11. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la poussière de bois à laver est engendrée dans au moins une étape de séchage des fibres de bois, au cours du mélange des fibres de bois avec des fibres de liant, au cours de la formation de non-tissé à partir de fibres de bois et de fibres de liant, au cours de la compression du non-tissé et/ou au cours de la confection du panneau isolant à base de fibres de bois compressé.
  12. Dispositif servant à laver de la poussière de bois, qui est engendrée dans le processus de fabrication de panneaux isolants à base de fibres de bois dans au moins une étape de procédé après le défibrage des copeaux de bois pour donner des fibres de bois, comprenant
    au moins une entrée pour la poussière de bois,
    au moins une entrée pour au moins un produit de lavage aqueux,
    au moins une sortie pour l'eau de lavage, et
    au moins une sortie pour la poussière de bois lavée,
    au moins un produit servant à isoler la poussière de bois lavée de l'eau de lavage, dans lequel l'au moins un moyen d'isolation entraîne une extraction de l'eau de lavage hors de la poussière de bois lavée, caractérisé en ce que l'au moins une entrée pour l'au moins un produit de lavage aqueux est réalisée sous la forme de buses.
  13. Dispositif selon la revendication 12, caractérisé en ce que l'au moins un moyen d'isolation est réalisé sous la forme d'une vis.
  14. Dispositif selon la revendication 12 ou 13, caractérisé par au moins un moyen servant à s'opposer au bouchon se formant au niveau de l'au moins une sortie pour la poussière de bois lavée.
  15. Installation servant à mettre en oeuvre un procédé selon l'une quelconque des revendications 1 à 11, comprenant
    - au moins un système de séchage servant au séchage de fibres de bois, au moins un dispositif servant à mélanger des fibres de bois et des fibres de liants, au moins un dispositif de formation de non-tissé à partir de fibres de bois et de fibres de liant, au moins un dispositif servant à compresser le non-tissé et/ou au moins un dispositif servant à confectionner le panneau à base de fibres de bois compressé, et
    - au moins un silo servant à collecter la poussière de bois engendrée dans au moins un desdits dispositifs,
    caractérisé par
    au moins un dispositif selon l'une quelconque des revendications 12 à 14 prévu en aval de l'au moins un silo.
EP16150920.3A 2016-01-12 2016-01-12 Procede de traitement de copeaux de bois et installation associee Active EP3192626B1 (fr)

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EP16150920.3A EP3192626B1 (fr) 2016-01-12 2016-01-12 Procede de traitement de copeaux de bois et installation associee
PL16150920T PL3192626T3 (pl) 2016-01-12 2016-01-12 Sposób przetwarzania pyłu drzewnego i instalacja dla tego sposobu

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