EP1222061B1 - Vorrichtung und verfahren zum aufschluss von holzwerkstoffen - Google Patents
Vorrichtung und verfahren zum aufschluss von holzwerkstoffen Download PDFInfo
- Publication number
- EP1222061B1 EP1222061B1 EP00942095A EP00942095A EP1222061B1 EP 1222061 B1 EP1222061 B1 EP 1222061B1 EP 00942095 A EP00942095 A EP 00942095A EP 00942095 A EP00942095 A EP 00942095A EP 1222061 B1 EP1222061 B1 EP 1222061B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- packing
- screws
- steam
- screw
- opening
- 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
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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
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/007—Manufacture of substantially flat articles, e.g. boards, from particles or fibres and at least partly composed of recycled 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
- B27N1/00—Pretreatment of moulding material
Definitions
- the present invention relates to a device for the digestion of wood-based materials according to the Preamble of the main claim as well as a procedure its implementation.
- Such a generic device is known (US-A-3,741,863).
- A serves in this device trained as at least one stuffing screw Transport device for transporting the Digestion material, this one in a Outer jacket arranged discharge opening radially is transported. Furthermore, the feed opening the first stuffing auger as Inlet opening (77) used for steam.
- the disadvantage of this known device Need besides the stuffing augers Seals in the form of a rotary valve (72) in front of the Provide feed opening of the first stuffing screw and in the form of a cyclone separator after the last one To provide a stuffing screw, creating such facilities are expensive.
- the object of the present invention is a Generic device and a method create a continuous and therefore simple and economical digestion of Enable wood-based materials.
- the device can that is, both economically and ecologically Respect to be operated optimally.
- digestion pressures from 2 to 11 bar Maintain overpressure, preferably in Range from 2 to 8 bar and especially in the range from 3 to 6 bar overpressure.
- the digestion process from the filling with the crushed chipboard fragments up to completely digested, moist wood mass is done with several, at least three in a row switched snails.
- This pressure tight Darning augers perform several functions: both the transportation as well as the continuous Crushing and hydrolysis of the pre-swollen Mass of wood on the one hand due to the friction of the particles to each other, and on the other hand the actual one takes place Digestion process by water, steam and Heat absorption within the pipe screw system.
- a modular construction is possible, whereby several identical screws and also drive systems can be used, making the cost crucial reduced.
- the first has proven to be useful Darning screw into which the material to be digested is introduced with preheated water fill.
- a water temperature of approx. 20 ° C to 95 ° C can be used.
- the screw transport within the plant enables a homogenization of the wood mass and about the constant rubbing together during the Transports a good and continuous Size reduction, which is a good surface wetting causes. This can cause the enthalpy of the steam to over the entire pipe length can be fully used, because the rubbing against each other always Detach loosened layers mechanically and underneath expose lying, not yet solved layers that then easily caught by the steam. About The process can process higher process pressures again be accelerated.
- the exhaust gas heat can be used almost completely and is compared to discontinuous operation not lost according to the state of the art.
- the heat the moist, open wood mass can can also be used by after leaving from the last screw conveyor shortest way into the dryer. Thereby heat loss and drying effort minimized.
- stuffing snails are thus used, which make it possible during the Material transport a pressure in too build up transporting material.
- Such Snails also known as stuffing snails are, for example, one-sided Snails, the outlet opening of which runs axially. she can be a progressive or degressive slope have, that is, the distances between the coils increase or decrease per turn.
- the transport speed through the stuffing augers is different, it can depend on the Vary the number of stuffing screws used. at a larger number of stuffing screws can Throughput speed can be increased at a smaller number, it must be reduced in order to dwell time necessary for the digestion guarantee.
- the digestion can generally follow a Residence time approx. 30 min, preferably 20 min are completely effected so that when using more than three stuffing screws the dwell time per Darning screw is only a few minutes. Across from conventional discontinuous digestion processes this means a significant shortening of the Digestion time.
- the water temperatures can be 20 to 95 ° C.
- the water causes in Interaction with the abandoned wood materials an additional seal for the digestion overpressure used compared to Outside atmosphere.
- the first stuffing screw is advantageously turned on the feed side of the material with a high pressure lock equipped. On the exit side is one Pressure control is not absolutely necessary since here the pressure can drop to ambient pressure.
- the stuffing snails all had one 400 mm in diameter and 2.5 m in length. The It was driven by an electric motor uniform power of 10 kW. The first Darning screw was with a high pressure lock Fill level indicator provided.
- Chipboard material which had been comminuted to a particle size of approximately 8x8x20 cm 3 was introduced into the first stuffing screw.
- the screw was filled with preheated water, which had a temperature of approx. 90 ° C.
- the feed speed of the stuffing augers was like this controlled that a dwell time of approx. 5 min. resulted in each stuffing screw.
- the third stuffing screw became saturated steam with a Pressure of 4 bar overpressure metered in.
- the device shown in Figure 1 contains five in a row arranged augers 1, 2, 3, 4 and 5, which are driven by drive motors 6.
- the axial exit area of each screw is axial Direction perpendicular to the entrance area of the flanged subsequent stuffing screw, whereby pressure-tight connections are used.
- the Darning screw 3 contains a steam supply 7, the is connected to a saturated steam source (not shown).
- the stuffing screw 1 contains a feed device 8 for entering the digestion material.
- At the The end of the last screw 5 is either one Vapor suction device or a spring cover 9 arranged.
- the device shown in Fig. 1 has overall five pressure or so-called stuffing screws 1, 2, 3, 4, 5, each by drive motors 6 are driven. At the first snail the supply of those that have preferably already broken Wood material pieces as material feed. At the last snail 5 is an end Dispensing opening provided with a spring cover.
- the five stuffing screws are arranged one behind the other and serve both as a digestion container and as Transport device for the wood-based material pieces.
- Each stuffing screw has a housing-fixed Outer jacket 10 and an arranged therein drivable shaft 11 arranged around it Coils 12 of a predeterminable slope. Between the gears of the spirals on the one hand and between the (inner) shaft and the (outer) outer jacket the particles are transported.
- the stuffing snails 2, 3, 4, and 5 indicate when reproduced Embodiment the same, each other but possibly different slopes of the Spirals up.
- the stuffing screw 1 has coils 13 changing diameter or pitch.
- the pressure screw and the stuffing screw 3 are each arranged horizontally.
- stuffing screws 2 and 4 are angled, preferably arranged vertically.
- the individual stuffing augers are like this connected in series that the Wood material pieces in the axial direction (Transport direction) 14 of the stuffing screw from the Feed opening 15 in the outer jacket 10 to one frontal discharge opening 16 in the axial direction are transported, being between the Feed opening and the discharge opening in the outer jacket 10 in the stuffing screw 3, the inlet opening 7 for Steam is provided.
- the stuffing screw 2 can with an inlet opening 17 for water, preferably Be equipped with hot water. All stuffing snails, or at least part of it can be heated be designed.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Processing Of Solid Wastes (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Debarking, Splitting, And Disintegration Of Timber (AREA)
- Disintegrating Or Milling (AREA)
- Screw Conveyors (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Heat Treatment Of Steel (AREA)
Description
- Figur 1
- den Aufbau einer erfindungsgemäßen Vorrichtung mit insgesamt fünf Stopfschnecken zur Durchführung des erfinderischen Verfahrens.
Claims (13)
- Vorrichtung zum Aufschluß von Holzwerkstoff-Stücken aus cellulose- und/oder lignocellulosehaltigen Werkstoffen, insbesondere Spanplatten, mitteldichten Faserplatten und dergleichen, mit einer Transporteinrichtung und zumindest einem Aufschlußbehältnis, wobei das Aufschlußbehältnis und die Transporteinrichtung als zumindest eine gemeinsame Stopfschnecke (1,2,3,4,5) mit einem gehäusefesten Außenmantel (10) und einer darin angeordneten, antreibbaren Welle (11) mit an dieser vorgesehenen Wendeln (12) einer vorgebbaren Steigung ausgebildet ist, und wobei die Holzwerkstoff-Stücke in der Stopfschnecke (1,2,3,4,5) von einer Zuführöffnung (15) im Außenmantel (10) zu einer Abgabeöffnung (16) in axialer Richtung (Transportrichtung 14) transportiert werden, dadurch gekennzeichnet, daß die Abgabeöffnung (16) stirnseitig angeordnet ist, daß zwischen der Zuführöffnung (15) und der Abgabeöffnung (16) im Außenmantel (10) der gemeinsamen Stopfschnecke nur eine Einleitungsöffnung (7) für Dampf vorgesehen ist, daß drei oder mehr Stopfschnecken (1,2,3,4,5) vorgesehen sind, daß die nur eine Dampfeinleitungsöffnung (7) an einer der Stopfschnecken (5) zwischen der in Transportrichtung (14) ersten oder letzten Stopfschnecke (1 bzw. 5) vorgesehen ist und daß die mehreren Stopfschnecken (1,2,3,4,5) in ihrer axialen Ausrichtung jeweils rechtwinklig zueinander angeordnet sind.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Einleitungsöffnung (7) als Druckdampföffnung ausgebildet ist.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Abgabeöffnung (16) der in Transportrichtung (14) letzten Stopfschnecke (5) mit einer Brüden-Absaugeinrichtung oder einer Federblende versehen ist.
- Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß insgesamt fünf hintereinander angeordnete Stopfschnecken (1,2,3,4,5) vorgesehen sind.
- Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Stopfschnecken (1,2,3,4,5) teilweise horizontal, teilweise vertikal in Transportrichtung (14) verlaufend angeordnet sind.
- Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß zumindest einer der Stopfschnecken (1,2,3,4,5) heizbar ausgebildet ist und/oder daß in zumindest einer der Stopfschnecken die Steigung der Wendeln (12) nicht konstant ist, sondern sich in Transportrichtung (14) vergrößert oder verkleinert.
- Verfahren zum Aufschluss von Holzwerkstoffen aus lignocellulosehaltigem Material, insbesondere Spanplatten, mitteldichten Faserplatten und anderen aus lignocellulosehaltigen Materialien hergestellten Reststoffen und Abfällen, unter Verwendung einer Vorrichtung gemäss Anspruch 1, wobei die Holzwerkstoffe durch die stirnseitigen Abgabeöffnungen (16) von mindestens drei druckdicht hintereinander angeordnete Stopfschnecken (1,2,3,4,5) kontinuierlich transportiert und dabei der Einwirkung der in den Stopfschnecken auftretenden Scher- und Reibungskräften unterworfen werden und wobei in mindestens eine der Stopfschnecken (1,2,3,4,5), die nicht die erste oder letzte der Stopfschnecken ist, Dampf eingedrückt wird.
- Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß der Dampf mit einem Überdruck von mindestens 2 bar eingedrückt wird.
- Verfahren nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass in einer Anordnung von einer ungeraden Anzahl von fördernden Stopfschnecken (1,2,3,4,5) der Dampf in die mittlere derselben eingedrückt wird.
- Verfahren nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass in einer Anordnung von einer geraden Anzahl von fördernden Stopfschnecken (1,2,3,4,5) der Dampf in eine der mittleren Stopfschnecken eingedrückt wird.
- Verfahren nach einem der Ansprüche 7 bis 10, dadurch gekennzeichnet, dass der Dampf einen Überdruck von 2 bis 11 bar aufweist.
- Verfahren nach einem der vorigen Ansprüche, dadurch gekennzeichnet, dass die Holzwerkstoffe vor dem Aufschluss auf eine Teilchengrösse von mindestens 5x5 cm zerkleinert werden.
- Verfahren nach einem der vorigen Ansprüche, dadurch gekennzeichnet, dass die Stopfschnecken zusätzlich geheizt werden.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19945466A DE19945466B4 (de) | 1999-09-22 | 1999-09-22 | Vorrichtung und Verfahren zum Aufschluss von Holzwerkstoffen |
DE19945466 | 1999-09-22 | ||
PCT/EP2000/005612 WO2001021368A1 (de) | 1999-09-22 | 2000-06-17 | Vorrichtung und verfahren zum aufschluss von holzwerkstoffen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1222061A1 EP1222061A1 (de) | 2002-07-17 |
EP1222061B1 true EP1222061B1 (de) | 2004-09-29 |
Family
ID=7922938
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00942095A Expired - Lifetime EP1222061B1 (de) | 1999-09-22 | 2000-06-17 | Vorrichtung und verfahren zum aufschluss von holzwerkstoffen |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1222061B1 (de) |
JP (1) | JP2003519581A (de) |
AT (1) | ATE277727T1 (de) |
AU (1) | AU5683300A (de) |
DE (2) | DE19945466B4 (de) |
ES (1) | ES2226867T3 (de) |
WO (1) | WO2001021368A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021176326A1 (en) | 2020-03-03 | 2021-09-10 | Unilin, Bv | Process for the production of particle board or wood fiber board |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006334463A (ja) * | 2005-05-31 | 2006-12-14 | Sasaki Corporation | 生物系物質の爆砕膨軟化装置 |
FI126796B (fi) * | 2006-10-19 | 2017-05-31 | Upm Kymmene Corp | Puukomposiittimateriaali ja menetelmä sen valmistamiseksi |
JP2011152679A (ja) * | 2010-01-26 | 2011-08-11 | Panasonic Electric Works Co Ltd | 木質ボードの製造方法及び木質ボード |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3741863A (en) * | 1971-08-27 | 1973-06-26 | Rust Eng Co | Method of recycling waste cellulosic materials |
ATE157298T1 (de) * | 1994-03-15 | 1997-09-15 | Fraunhofer Ges Forschung | Verfahren zur wiedergewinnung von spänen und fasern aus holzwerkstoffreststücken, altmöbeln, produktionsrückständen, abfällen und anderen holzwerkstoffhaltigen materialien |
PL184356B1 (pl) * | 1996-04-12 | 2002-10-31 | Marlit Ltd | Sposób wytwarzania lignocelulozowych materiałów złożonych |
GB9625068D0 (en) * | 1996-12-02 | 1997-01-22 | Marlit Ltd | Method for production of lignocellulosic composite materials |
DE19819988A1 (de) * | 1997-05-16 | 1999-04-01 | Fraunhofer Ges Forschung | Anlage zum kontinuierlichen Aufschluß von Holzwerkstoffen |
-
1999
- 1999-09-22 DE DE19945466A patent/DE19945466B4/de not_active Expired - Fee Related
-
2000
- 2000-06-17 DE DE50008025T patent/DE50008025D1/de not_active Expired - Lifetime
- 2000-06-17 AU AU56833/00A patent/AU5683300A/en not_active Abandoned
- 2000-06-17 JP JP2001524775A patent/JP2003519581A/ja active Pending
- 2000-06-17 WO PCT/EP2000/005612 patent/WO2001021368A1/de active IP Right Grant
- 2000-06-17 AT AT00942095T patent/ATE277727T1/de active
- 2000-06-17 EP EP00942095A patent/EP1222061B1/de not_active Expired - Lifetime
- 2000-06-17 ES ES00942095T patent/ES2226867T3/es not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021176326A1 (en) | 2020-03-03 | 2021-09-10 | Unilin, Bv | Process for the production of particle board or wood fiber board |
Also Published As
Publication number | Publication date |
---|---|
ES2226867T3 (es) | 2005-04-01 |
AU5683300A (en) | 2001-04-24 |
DE19945466B4 (de) | 2004-09-23 |
DE50008025D1 (de) | 2004-11-04 |
JP2003519581A (ja) | 2003-06-24 |
DE19945466A1 (de) | 2002-10-24 |
ATE277727T1 (de) | 2004-10-15 |
EP1222061A1 (de) | 2002-07-17 |
WO2001021368A1 (de) | 2001-03-29 |
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