EP1504865B1 - Procédé et dispositif pour enrober des matériaux coulant avec un liant - Google Patents
Procédé et dispositif pour enrober des matériaux coulant avec un liant Download PDFInfo
- Publication number
- EP1504865B1 EP1504865B1 EP04018258A EP04018258A EP1504865B1 EP 1504865 B1 EP1504865 B1 EP 1504865B1 EP 04018258 A EP04018258 A EP 04018258A EP 04018258 A EP04018258 A EP 04018258A EP 1504865 B1 EP1504865 B1 EP 1504865B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wetting
- section
- free
- materials
- flowing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims description 18
- 239000011230 binding agent Substances 0.000 title description 13
- 239000011248 coating agent Substances 0.000 title 1
- 238000000576 coating method Methods 0.000 title 1
- 238000009736 wetting Methods 0.000 claims abstract description 55
- 238000001035 drying Methods 0.000 claims abstract description 7
- 239000007767 bonding agent Substances 0.000 claims abstract 8
- 239000000835 fiber Substances 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 11
- 238000004026 adhesive bonding Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 7
- 239000002826 coolant Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims 2
- 239000012159 carrier gas Substances 0.000 abstract 1
- 229920006395 saturated elastomer Polymers 0.000 abstract 1
- 239000003292 glue Substances 0.000 description 15
- 229920002522 Wood fibre Polymers 0.000 description 12
- 239000002025 wood fiber Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 7
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011094 fiberboard Substances 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000010875 treated wood Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
- B27N1/02—Mixing the material with binding agent
- B27N1/0227—Mixing the material with binding agent using rotating stirrers, e.g. the agent being fed through the shaft of the stirrer
- B27N1/0254—Mixing the material with binding agent using rotating stirrers, e.g. the agent being fed through the shaft of the stirrer with means for spraying the agent on the material before it is introduced in the mixer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
- B27N1/02—Mixing the material with binding agent
Definitions
- the invention relates to a method and a device for wetting free-flowing goods with a binder.
- free-flowing goods in particular lignocellulose-containing particles such as wood fibers, wood chips, wood chips and fibers, chips and chips from renewable raw materials such as straw, hemp, bamboo, rice straw and granular plastic materials are included.
- Plate-shaped materials in particular fibreboards, are produced by pressing glued fibers.
- the wetting of the fibers with a binder is an important process step in this production process.
- the gluing systems or processes have the task of distributing the binder uniformly over the fibers so that the binder content can be kept low.
- a known method for gluing of free-flowing goods is the so-called blow-line gluing.
- the still wet fibers are transported by vapor pressure through a conveyor line and thereby admixed with binder.
- the glued fibers are then dried in a dryer and fed to the further production process.
- fiber drying after gluing has the disadvantage of high glue consumption. Since the cost of the glue (binder) in relation to the cost of the fibers are very high, the high glue consumption represents a drastic increase in manufacturing costs.
- Another disadvantage of this glue method is that is released during the drying of the previously glued fibers formaldehyde and hereby consuming dryer exhaust air cleaning measures are required.
- Such a method and a device for the dry gluing of pneumatically conveyed particles is known.
- the wood fibers are first dried in a dryer to the required final moisture content and then fed via a delivery line having a cross-sectional reduction, a wetting section.
- the wetting section is provided with glue nozzles.
- the wetting section is designed as a diffuser section, which is intended to effect a cross-sectional widening and thus a turbulent flow of the fibers in the section.
- the process described above is intended to avoid the formation of fiber clumps, as these fiber clusters in the fiberboard surface can lead to size stains as well as causing damage to the press belts of the press.
- the object of the present invention is to develop a method and a device for wetting flowable goods with a binder in the course of the production of plate-shaped materials in such a way that a uniform glue distribution and a high level of operational reliability are achieved.
- the bulk goods to be wetted with binders referred to below as particles, are first dried to final moisture content.
- the dried particles are then fed by means of transport air to a wetting section which is provided with a plurality of gluing nozzles.
- the gluing nozzles are arranged spirally distributed along the wetting section over the circumference.
- a reducing section which effects a cross-sectional reduction of D1 of the delivery line to D2 of the wetting section.
- the Fig. 1 shows a schematic representation of the device according to the invention for the wetting of particles, in particular of wood fibers with a binder in the course of the production of fiberboard.
- the delivery line 4 is charged by means of a heat exchanger 5 with heated air, which has approximately 60-120 °, preferably 90 °.
- heated air serves as transport air and leads the wood fibers along the conveying line 4 in the direction of the arrows 6 to the wetting section 7.
- the transport air could also have room temperature.
- a reducing section 8 is integrated in the conveying line 4, which causes a reduction of the diameter D1 of the conveying line 4 to a diameter D2 and thus an increase in the speed of the conveyed wood fibers.
- the subsequent to the Reduzierabites 8 wetting section 7 is formed as a pipe section with a constant diameter D2.
- the diameter of the pipe section may also be formed slightly smaller or larger in the conveying direction.
- the length of the wetting section L1 is 20 to 30 meters, depending on the plant capacity. Due to the reduction of the diameter from D1 to D2 immediately before the wetting section 7, the wood fibers reach a maximum speed of about 30-60 m / s when flowing into the wetting section 7.
- a plurality of circumferentially spirally arranged glue nozzles 9 are provided in the conveying direction along the wetting portion 7 .
- the number and arrangement of the glue nozzles 9 can be adjusted depending on the type of glue and the amount of glue.
- the glue or binder is brought by dilution to the viscosity required for the injection.
- the wetting portion 7 is made of a high-quality polished material to prevent glue deposits on the inner circumferential surface along the wetting portion 7.
- Furthermore, in order to prevent caking on the shell inner surface of the wetting portion 7 is formed as a double-walled tube having an inlet E and an outlet A for a cooling medium. The temperature of the cooling medium is adjusted so that forms a condensate film on the pipe inner wall.
- an indwelling zone 10 is formed, which is likewise designed as a pipe section with the diameter D2 and has a length L2 of approximately 15 to 30 meters.
- This pipe section is also made of high quality polished material to prevent glue deposits.
- the wetting zone 7 downstream of the wetting zone 7 serves to further homogenize the wetting of the fibers.
- a mixing chamber 11 is arranged, which is provided with baffles to effect a uniform mixing of the glued fibers with an additionally supplied air flow.
- the baffles are arranged parallel spaced in the conveying direction running.
- the supplied air stream has a temperature of 60-120 ° C., preferably 90 ° C., and is supplied to the mixing chamber 11 via a separate feed line 12.
- Downstream of the mixing chamber 11 is a further conveying line 13, in which the glued fibers are post-dried by means of the supplied hot air. This drying is on this Place required because the glue was added to the fibers water and thus the previously set final moisture was increased by wetting with binder.
- the feed line 13 downstream of the mixing chamber 11 has a substantially larger diameter D3 than the diameter of the wetting and residence section, so that the transport speed at this point is reduced and the residence time in this section is greater.
- the glued fibers pass through a cyclone and are subsequently fed to the scattering bunker associated with a forming station. There, the glued fibers are sprinkled to a non-woven fabric and then pressed into wood fiber boards.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Drying Of Solid Materials (AREA)
- Paper (AREA)
Claims (8)
- Procédé, dont le but est d'humecter avec un agent liant des matériaux d'épandage de nature granulaire, soit en particulier fibres, particules ou rognures de matériaux lignocellulosiques et/ou de matières brutes cellulosiques, ou de matières plastiques, procédant par étapes comme suit :a) Séchage du matériau d'épandage de nature granulaire à concurrence d'une valeur ultime d'humidité de 3-20%;b) Apport des matériaux d'épandage de nature granulaire dans une tuyauterie de transport (4) ;c) Convoyage pneumatique des matériaux d'épandage de nature granulaire par une tuyauterie de transport (4) vers un tronçon humecteur (7) ;d) Accélération du flux des matériaux d'épandage de nature granulaire sur un tronçon réducteur (8) se trouvant à l'amont immédiat du tronçon humecteur (7) ;e) Humectation des matériaux d'épandage de nature granulaire sur le tronçon d'humectation (7) au moyen d'un agent liant ;caractérisé en ce que l'humectation du matériau d'épandage de nature granulaire est effectuée à vélocité accrue du flux et que le matériau d'épandage de nature granulaire est ensuite séché dans la tuyauterie de transport (13) par addition d'un gaz propulseur refoulé échauffé.
- Procédé ayant pour but d'humecter les matériaux d'épandage de nature granulaire selon la revendication 1, où les matériaux d'épandage de nature granulaire, après être passés par le tronçon humecteur (7) aboutissent ensuite au tronçon de temporisation (10).
- Procédé ayant pour but d'humecter les matériaux d'épandage de nature granulaire selon la revendication 1 ou 2, le convoyage pneumatique étant effectué au moyen d'air échauffé.
- Procédé ayant pour but d'humecter les matériaux d'épandage de nature granulaire selon l'une des revendications précédentes, la température de la surface extérieure du tronçon d'humectation (7) étant équilibrée de telle manière, qu'une pellicule de condensat se dépose sur la paroi intérieure.
- Dispositif permettant d'humecter avec un agent liant des matériaux de nature granulaire transportés par convoyeur pneumatique, les matériaux de nature granulaire étant d'abord séchés à concurrence de la valeur d'humidité finale, et transportés ensuite dans une tuyauterie de transport (4) vers le tronçon humecteur (7), un tronçon réducteur (8) se trouvant en amont du tronçon humecteur (7), le tronçon réducteur formant une réduction de section transversale D1 de la tuyauterie de convoyage (4) à la section transversale D2 du tronçon humecteur (7), celui-ci étant équipé d'un grand nombre de buses de collage (9), caractérisé en ce que le tronçon humecteur (7) est d'une section transversale D2 sur la totalité de la longueur de convoyage (L1) et qu'en aval du tronçon d'humectation (7) on trouve une conduite de convoyage (13) où il est procédé au séchage des matériaux de nature granulaire.
- Dispositif permettant d'humecter au moyen d'un agent liant des matériaux de nature granulaire par transportés par convoyage pneumatique selon la revendication 5, un tronçon temporisant (10) étant intercalé entre le tronçon humecteur (7) et la conduite de convoyage (13).
- Dispositif permettant d'humecter au moyen d'un agent liant des matériaux de nature granulaire transportés par convoyage pneumatique selon la revendication 6, le tronçon temporisant (10) étant connecté avec le caisson de mélange (11), le caisson de mélange (11) étant équipé d'une conduite d'alimentation (12) pour le milieu de convoyage gazeux échauffé.
- Dispositif permettant d'humecter au moyen d'un agent liant des matériaux de nature granulaire transportés par convoyage pneumatique selon les revendications 5 à 7, le tronçon humecteur (7) étant constitué par un matériau poli de haute qualité, étant formé comme un tube à double paroi ayant une prise d'admission et une évacuation pour le milieu refroidisseur.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10336533A DE10336533A1 (de) | 2003-08-05 | 2003-08-05 | Verfahren und Vorrichtung zum Benetzen von rieselförmigen Gütern mit einem Bindemittel |
DE10336533 | 2003-08-05 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1504865A2 EP1504865A2 (fr) | 2005-02-09 |
EP1504865A3 EP1504865A3 (fr) | 2005-05-04 |
EP1504865B1 true EP1504865B1 (fr) | 2010-01-13 |
Family
ID=33547161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04018258A Expired - Lifetime EP1504865B1 (fr) | 2003-08-05 | 2004-08-02 | Procédé et dispositif pour enrober des matériaux coulant avec un liant |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1504865B1 (fr) |
AT (1) | ATE454969T1 (fr) |
DE (2) | DE10336533A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NZ530339A (en) | 2004-06-23 | 2007-01-26 | Nz Forest Research Inst Ltd | Method for producing wood fibre pellets |
DE102008052961B4 (de) * | 2008-10-23 | 2016-07-28 | SWISS KRONO Tec AG | Verfahren zum Herstellen von Holzwerkstoffen |
DE202008015419U1 (de) | 2008-11-21 | 2010-04-22 | Epple, Albrecht, Dr. | Vorrichtung zur Beleimung von Fasern in einem Blasrohr |
IT1399772B1 (it) | 2010-04-30 | 2013-05-03 | Imal Srl | Apparato per l'iniezione di componenti chimici in un flusso di materiale legnoso incoerente |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2850421A (en) * | 1953-03-31 | 1958-09-02 | George F Shea | Method for producing reinforced plastic, resinous, or like structural bodies, forms,linings, and coatings |
DE1692852B1 (de) * | 1966-10-28 | 1971-06-24 | Fiskeby Ab | Verfahren und Vorrichtung zur Behandlung von Holzschnitzeln |
SE461202B (sv) * | 1988-05-19 | 1990-01-22 | Fredriksson Sven | Saett och anordning foer att tillverka en fiberplatta |
DE19506353A1 (de) * | 1995-02-23 | 1996-08-29 | Schenck Ag Carl | Verfahren und Vorrichtung zum Benetzen mit einem Fluid |
DE19740676C2 (de) * | 1997-09-16 | 2003-07-17 | Fraunhofer Ges Forschung | Verfahren zum Beleimen von Fasern |
IT1307924B1 (it) * | 1999-01-25 | 2001-11-29 | Cmp Spa | Apparecchiatura incollatrice per impianti per produrre pannelli infibra di legno. |
DE10061072A1 (de) * | 2000-12-08 | 2002-06-13 | Flakeboard Company Ltd St Step | Verfahren und Vorrichtung zum Beleimen von zur Herstellung von Faserplatten vorgesehenen, getrockneten Fasern |
DE10153593B4 (de) * | 2001-11-02 | 2005-11-17 | Fritz Egger Gmbh & Co | Vorrichtung und Verfahren zum Benetzen von Holzfasern mit einem Bindemittelfluid |
DE10226820B3 (de) * | 2002-06-15 | 2004-04-01 | Flakeboard Company Limited, St.Stephen | Verfahren und Vorrichtung zum Beleimen von zur Herstellung von Faserplatten vorgesehenen, getrockneten Fasern |
-
2003
- 2003-08-05 DE DE10336533A patent/DE10336533A1/de not_active Withdrawn
-
2004
- 2004-08-02 AT AT04018258T patent/ATE454969T1/de not_active IP Right Cessation
- 2004-08-02 DE DE502004010630T patent/DE502004010630D1/de not_active Expired - Lifetime
- 2004-08-02 EP EP04018258A patent/EP1504865B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1504865A3 (fr) | 2005-05-04 |
EP1504865A2 (fr) | 2005-02-09 |
DE10336533A1 (de) | 2005-02-24 |
DE502004010630D1 (de) | 2010-03-04 |
ATE454969T1 (de) | 2010-01-15 |
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