EP1834747B1 - Method and apparatus for separating steam from lignocellulosic fibres - Google Patents
Method and apparatus for separating steam from lignocellulosic fibres Download PDFInfo
- Publication number
- EP1834747B1 EP1834747B1 EP20070005559 EP07005559A EP1834747B1 EP 1834747 B1 EP1834747 B1 EP 1834747B1 EP 20070005559 EP20070005559 EP 20070005559 EP 07005559 A EP07005559 A EP 07005559A EP 1834747 B1 EP1834747 B1 EP 1834747B1
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- EP
- European Patent Office
- Prior art keywords
- steam
- partial area
- fibres
- blow line
- dryer
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
-
- 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
- B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
- F26B17/101—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
- F26B2210/16—Wood, e.g. lumber, timber
Definitions
- the invention relates to a method for the separation of water vapor from lignocellulose-containing fibers, the fibers are wet-digested from a starting material and fed through a blowpipe to a dryer and wherein prior to drying water vapor is separated from the fibers. Furthermore, the invention relates to a device for the separation of water vapor from lignocellulosic fibers, with a blowpipe, through which the wet-digested fibers are fed to a dryer, and with a separation device to separate water vapor before the dryer from the fibers.
- the invention is intended for use in the production of moldings, in particular plates, from the lignocellulose-containing fibers.
- MDF medium density fiberboard
- the invention has for its object to provide a method and an apparatus of the type described above, in which a low proportion of structural complexity and low susceptibility, a significant proportion of the water vapor can be separated from the fibers before drying in the dryer.
- the object is achieved by a method having the features of the independent patent claim 1 and by a device having the features of the independent patent claim 7.
- Preferred embodiments of the new method and the new device are described in the dependent claims 2 to 6 and 8 to 12, respectively.
- a portion of the water vapor is discharged from the fibers through a porous portion of a wall of the blowpipe.
- the existing in the blowpipe overpressure is utilized. Nevertheless, the drained part of the steam can still have such a high overpressure that it can be used directly in the context of the production of moldings from lignocellulose-containing fibers.
- the wall of the blowpipe only a porous Include part through which the water vapor can escape from the blowpipe.
- only a pipe system for discharging and using the discharged water vapor must be installed.
- the water vapor is discharged before gluing the fibers in the blowpipe to prevent clogging of the porous portion of the wall of the blowpipe, through which the water vapor is discharged, with binder. Clogging of the porous portion by the fibers themselves may be preceded by a small pore size of the porous portion.
- water vapor is typically used in the prior art under slightly elevated pressure, which is yet to be newly created.
- the porous portion of the blower tube may be formed by a ceramic filter, which is arranged in particular in front of a gluing station for the fibers in the blowpipe. From an adjacent to the ceramic filter receiving line for the exiting water vapor can a Returning to a preheating station for the starting material of the fibers may be provided, in which the discharged water vapor is taken up under a moderate overpressure of typically about 0.3 MPa.
- the region of the ceramic filter can be subdivided into sections which can be rinsed off one another separately and thus alternately. It can also be provided for the alternate backwashing and removal of water from the blowpipe several ceramic filter.
- Fig. 1 sketched device 1 is used for digesting and processing of lignocellulosic fibers from a starting material 2, for example in the form of wood chips.
- the starting material 2 is heated in a storage tank 3 and moistened.
- water vapor 4 is supplied to the storage tank from below.
- the warmed starting material 2 via a screw conveyor 5 is supplied to a pressurized digester 6.
- Heat energy is supplied to the digester 6 in the form of water vapor 4.
- the thus prepared starting material 2 is wet-fiberized in a defibrator 7 and then discharged into a blowpipe 8.
- the pressure built up previously from the digester 6 is released to separate the fiber, so that flows through the blowpipe 8, a suspension of water vapor and fibers.
- a gluing station 9 the fibers in the blower tube 8 are sprayed with binder 10 to glue them.
- the glued fibers pass with the steam in a dryer 11, in which they are adjusted with previously warmed air 12 to a desired fiber moisture.
- the excess air enriched with the excess water vapor in a cyclone 13 are deposited, and the fibers pass into a fiber container 14, from which they are processed further to form using the use of elevated temperature and elevated pressure moldings, in particular plates from them ,
- a separation device 15 is provided on the blowpipe 8 to discharge a portion 16 of the water vapor from the blowpipe 8 to reuse it in the preparation of the starting material 2 and a Load of the dryer 11 with this part 16 to avoid water vapor.
- the separating device 15, which is arranged relatively far at the beginning of the blower tube 8, where in the blowpipe 8, a comparatively large pressure prevails, is in Fig. 2 outlined in more detail.
- the separating device 15 comprises a ceramic filter 17, which forms a porous portion 18 of the wall 19 of the blow pipe 8. Through the interior of the ceramic filter 17 which is under pressure water vapor flows together with the fibers funded by him.
- a proportion of the water vapor in the order of 10% of its total volume is thereby pressed from the ceramic filter 17 and passes on the back in a receiving line 20.
- From the receiving line 20 of the water vapor 16 passes through a valve 21 back to the digestion of the starting material in the fibers.
- Another leading to the discharge line 20 valve 22 is provided for backwashing the ceramic filter 17 by the connecting line 20 is connected via the valve 22 with a pressure line 22 which acts on the ceramic filter 17 from the outside with a higher pressure than it inside the blowpipe 8 prevails.
- a typical pore size of the ceramic filter 17 is 5 microns.
- the typical wood fiber size in the blow tube 8 is between 10 microns and 3000 microns.
- the risk of clogging of the ceramic filter 17 is therefore low and can be reduced to virtually zero by a regular counter-pressure.
- the ceramic filter if it is made of such a material, as it is currently used for example in ceramic filters for the purification of flue gases in hard coal power plants, both extremely heat and moisture resistant. So very long lifetimes of the ceramic filter are expected.
- the dryer is also significantly relieved when drying the fibers to a desired fiber moisture content.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Nonwoven Fabrics (AREA)
- Paper (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Description
Die Erfindung bezieht sich auf ein Verfahren zur Abscheidung von Wasserdampf von Lignocellulose haltigen Fasern, wobei die Fasern aus einem Ausgangsmaterial feucht aufgeschlossen und durch ein Blasrohr einem Trockner zugeführt werden und wobei vor dem Trocknen Wasserdampf von den Fasern abgetrennt wird. Weiterhin bezieht sich die Erfindung auf eine Vorrichtung zur Abscheidung von Wasserdampf von Lignocellulose haltigen Fasern, mit einem Blasrohr, durch den die feucht aufgeschlossenen Fasern einem Trockner zugeführt werden, und mit einer Abtrenneinrichtung, um Wasserdampf vor dem Trockner von den Fasern abzutrennen. Die Erfindung ist zur Anwendung bei der Herstellung von Formkörpern, insbesondere Platten, aus den Lignocellulose haltigen Fasern vorgesehen.The invention relates to a method for the separation of water vapor from lignocellulose-containing fibers, the fibers are wet-digested from a starting material and fed through a blowpipe to a dryer and wherein prior to drying water vapor is separated from the fibers. Furthermore, the invention relates to a device for the separation of water vapor from lignocellulosic fibers, with a blowpipe, through which the wet-digested fibers are fed to a dryer, and with a separation device to separate water vapor before the dryer from the fibers. The invention is intended for use in the production of moldings, in particular plates, from the lignocellulose-containing fibers.
Ein Anwendungsgebiet der vorliegenden Erfindung ist die Herstellung von mitteldichten Faserplatten (MDF). Bei der üblichen Herstellung von MDF werden Holzhackschnitzel unter Druck feucht zerfasert und dann durch Entspannung des Drucks in ein Blasrohr hinein vereinzelt. Sich bei der Entspannung des Drucks aus der Feuchtigkeit bildender Wasserdampf dient dann zur Förderung der Fasern durch das Blasrohr bis zu einem Trockner. Noch vor dem Trockner kann innerhalb des Blasrohrs eine Beleimung der Fasern mit einem Bindemittel erfolgen. Nach dem Trockner wird aus den Fasern eine Fasermatte geformt, die anschließend zu den gewünschten Platten unter Einwirkung von erhöhtem Druck und erhöhter Temperatur und unter Aushärtung des Bindemittels verpresst wird.One field of application of the present invention is the production of medium density fiberboard (MDF). In the usual production of MDF, woodchips are wet-shredded under pressure and then separated by relaxing the pressure in a blowpipe. In the relaxation of the pressure from the moisture-forming water vapor then serves to promote the fibers through the blowpipe to a dryer. Even before the dryer can be done within the blowpipe gluing the fibers with a binder. After the dryer, a fiber mat is formed from the fibers, which is then pressed to the desired plates under the action of elevated pressure and elevated temperature and curing of the binder.
Der Nachteil dieses weithin eingesetzten Verfahrens besteht darin, dass der Strom des Wasserdampfs durch das Blasrohr ungenutzt in den Trockner eintritt und dort sogar den Energieaufwand für die Einstellung der Fasern auf eine gewünschte reduzierte Faserfeuchte erhöht. Es ist daher grundsätzlich bekannt, einen Teil des Wasserdampfs vor dem Trockner von den Fasern abzutrennen, um die in dem Wasserdampf inne wohnende Energie zumindest teilweise zurück zu gewinnen und um den Trockner weniger stark mit Feuchtigkeit zu belasten. Hierzu werde zyklonartige Einreichungen eingesetzt, wie dies beispielsweise in der
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung der eingangs beschriebenen Art aufzuzeigen, bei denen mit geringem baulichen Aufwand und mit geringer Störanfälligkeit ein signifikanter Anteil des Wasserdampfs von den Fasern vor deren Trocknung in dem Trockner abgeschieden werden kann.The invention has for its object to provide a method and an apparatus of the type described above, in which a low proportion of structural complexity and low susceptibility, a significant proportion of the water vapor can be separated from the fibers before drying in the dryer.
Erfindungsgemäß wird die Aufgabe durch ein Verfahren mit den Merkmalen des unabhängigen Patentanspruchs 1 und durch eine Vorrichtung mit den Merkmalen des unabhängigen Patentanspruchs 7 gelöst. Bevorzugte Ausführungsformen des neuen Verfahrens und der neuen Vorrichtung sind in den abhängigen Patentansprüchen 2 bis 6 bzw. 8 bis 12 beschrieben.According to the invention the object is achieved by a method having the features of the
Bei der Erfindung wird ein Teil des Wasserdampfs von den Fasern durch einen porösen Teilbereich einer Wandung des Blasrohrs abgelassen. Dazu wird der in dem Blasrohr vorhandene Überdruck ausgenutzt. Dennoch kann auch der abgelassene Teil des Wasserdampfs noch einen so hohen Überdruck aufweisen, dass er direkt im Rahmen der Herstellung von Formkörpern aus Lignocellulose haltigen Fasern eingesetzt werden kann. Für die Durchführung des neuen Verfahrens muss die Wandung des Blasrohrs nur einen porösen Teilbereich umfassen, durch den der Wasserdampf aus dem Blasrohr austreten kann. Darüber hinaus muss nur noch ein Rohrsystem zum Abführen und Verwenden des abgelassenen Wasserdampfs installiert werden.In the invention, a portion of the water vapor is discharged from the fibers through a porous portion of a wall of the blowpipe. For this purpose, the existing in the blowpipe overpressure is utilized. Nevertheless, the drained part of the steam can still have such a high overpressure that it can be used directly in the context of the production of moldings from lignocellulose-containing fibers. For the implementation of the new method, the wall of the blowpipe only a porous Include part through which the water vapor can escape from the blowpipe. In addition, only a pipe system for discharging and using the discharged water vapor must be installed.
Trotzdem ist es bei dem neuen Verfahren möglich, bis zu einem Fünftel des Wasserdampfs in dem Blasrohr abzulassen. Typischerweise wird das neue Verfahren genutzt, um von 5 bis 15 % des Wasserdampfs in dem Blasrohr abzulassen. Bereits hierdurch werden erhebliche Einsparungen an Energie im Bereich des Trockners erzielt. Zusätzlich wird die in dem abgelassenen Wasserdampf enthaltene Energie nutzbar gemacht.Nevertheless, with the new method, it is possible to vent up to a fifth of the water vapor in the blowpipe. Typically, the new process is used to vent from 5 to 15% of the water vapor in the blowpipe. Already hereby significant savings in energy in the dryer are achieved. In addition, the energy contained in the discharged water vapor is utilized.
Vorzugsweise wird bei dem neuen Verfahren der Wasserdampf vor einer Beleimung der Fasern in dem Blasrohr abgelassen, um eine Verstopfung des porösen Teilbereichs der Wandung des Blasrohrs, durch den der Wasserdampf abgelassen wird, mit Bindemittel zu vermeiden. Einer Verstopfung des porösen Teilbereichs durch die Fasern selbst kann durch eine geringe Porengröße des porösen Teilbereichs vorgebaut werden.Preferably, in the new method, the water vapor is discharged before gluing the fibers in the blowpipe to prevent clogging of the porous portion of the wall of the blowpipe, through which the water vapor is discharged, with binder. Clogging of the porous portion by the fibers themselves may be preceded by a small pore size of the porous portion.
Eine Einsatzmöglichkeit des abgelassenen Wasserdampfs ist die Vorerwärmung des Ausgangsmaterials vor dessen Aufschluss in die Fasern. Hier wird bereits im Stand der Technik typischerweise Wasserdampf unter leicht erhöhtem Druck eingesetzt, der bislang aber neu erzeugt wird.One possible use of the drained water vapor is the preheating of the starting material before it is broken down into the fibers. Here, water vapor is typically used in the prior art under slightly elevated pressure, which is yet to be newly created.
Falls bei dem neuen Verfahren trotz einer kleinen Porengröße des porösen Teilbereichs Verstopfungen des porösen Teilbereichs auftreten, können diese durch eine Gegendruckbeaufschlagung des porösen Teilbereichs in Intervallen beseitigt werden. Wenn dabei unterschiedliche Abschnitte des porösen Teilbereichs der Wandung zu unterschiedlichen Zeitpunkten mit einem Gegendruck von außen beaufschlagt werden, steht immer zumindest einer der Abschnitte für den Abzug von Wasserdampf aus dem Blasrohr zur Verfügung, und es können auch über einen Wechsel der Rückspülung zwischen den Abschnitten im Wesentlichen konstante Strömungsverhältnisse in dem Blasrohraufrechterhalten werden.If, in spite of a small pore size of the porous portion, blockages of the porous portion occur in the new method, they can be eliminated by counterpressurizing the porous portion at intervals. If different portions of the porous portion of the wall are acted upon at different times with a back pressure from the outside, is always at least one of the sections for the withdrawal of water vapor from the blowpipe available, and it can also be a change of the backwash between the sections in Substantially constant flow conditions are maintained in the blower tube.
Bei der neuen Vorrichtung zur Durchführung des neuen Verfahrens kann der poröse Teilbereich des Blasrohrs durch einen Keramikfilter ausgebildet sein, der insbesondere vor einer Beleimungsstation für die Fasern in dem Blasrohr angeordnet ist. Von einer an den Keramikfilter angrenzenden Aufnahmeleitung für den austretenden Wasserdampf kann eine Rückführung bis zu einer Vorerwärmungsstation für das Ausgangsmaterial der Fasern vorgesehen sein, in der der abgelassene Wasserdampf unter einem mäßigen Überdruck von typischerweise etwa 0,3 MPa aufgenommen wird.In the new apparatus for carrying out the new method, the porous portion of the blower tube may be formed by a ceramic filter, which is arranged in particular in front of a gluing station for the fibers in the blowpipe. From an adjacent to the ceramic filter receiving line for the exiting water vapor can a Returning to a preheating station for the starting material of the fibers may be provided, in which the discharged water vapor is taken up under a moderate overpressure of typically about 0.3 MPa.
An der Aufnahmeleitung für den Wasserdampf können für eine Rückspülung des Filters durch Aufbringung eines Gegendrucks notwendigen Ventile angeordnet sein. Dabei kann der Bereich des Keramikfilters in Abschnitte unterteilt sein, die getrennt voneinander und damit wechselweise zurück gespült werden können. Es können auch mehrere Keramikfilter zum wechselweisen Rückspülen und Abziehen von Wasser aus dem Blasrohr vorgesehen sein.At the receiving line for the steam can be arranged for a backwashing of the filter by applying a back pressure necessary valves. In this case, the region of the ceramic filter can be subdivided into sections which can be rinsed off one another separately and thus alternately. It can also be provided for the alternate backwashing and removal of water from the blowpipe several ceramic filter.
Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Patentansprüchen, der Beschreibung und den Zeichnungen. Die in der Beschreibungseinleitung genannten Vorteile von Merkmalen und von Kombinationen mehrerer Merkmale sind lediglich beispielhaft und können alternativ oder kumulativ zur Wirkung kommen, ohne dass die Vorteile zwingend von erfindungsgemäßen Ausführungsformen erzielt werden müssen. Weitere Merkmale sind den Zeichnungen - insbesondere den dargestellten Geometrien und den relativen Abmessungen mehrerer Bauteile zueinander sowie deren relativer Anordnung und Wirkverbindung - zu entnehmen. Die Kombination von Merkmalen unterschiedlicher Ausführungsformen der Erfindung oder von Merkmalen unterschiedlicher Patentansprüche ist ebenfalls abweichend von den gewählten Rückbeziehungen der Patentansprüche möglich und wird hiermit angeregt. Dies betrifft auch solche Merkmale, die in separaten Zeichnungen dargestellt sind oder bei deren Beschreibung genannt werden. Diese Merkmale können auch mit Merkmalen unterschiedlicher Patentansprüche kombiniert werden. Ebenso können in den Patentansprüchen aufgeführte Merkmale für weitere Ausführungsformen der Erfindung entfallen.Advantageous developments of the invention will become apparent from the claims, the description and the drawings. The advantages of features and of combinations of several features mentioned in the introduction to the description are merely exemplary and can come into effect alternatively or cumulatively, without the advantages having to be achieved by embodiments according to the invention. Further features are the drawings - in particular the illustrated geometries and the relative dimensions of several components to each other and their relative arrangement and operative connection - refer. The combination of features of different embodiments of the invention or of features of different claims is also possible deviating from the chosen relationships of the claims and is hereby stimulated. This also applies to those features which are shown in separate drawings or are mentioned in their description. These features can also be combined with features of different claims. Likewise, in the claims listed features for further embodiments of the invention can be omitted.
Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels unter Bezugnahme auf die beigefügten Zeichnungen näher erläutert und beschrieben.
- Fig.1
- zeigt den grundsätzlichen Aufbau und die Funktion einer Vorrichtung zur Aufbereitung von Fasern zur Verwendung bei der Durchführung des neuen Verfahrens, beispielsweise im Rahmen der Herstellung von MDF, und
- Fig. 2
- zeigt eine Abtrenneinrichtung zum Abziehen von Wasserdampf aus dem Blasrohr der Vorrichtung gemäß
Fig. 1 als Detail vonFig. 1 .
- Fig.1
- shows the basic structure and the function of a device for processing fibers for use in carrying out the new method, for example in the context of the production of MDF, and
- Fig. 2
- shows a separator for removing water vapor from the blowpipe of the device according to
Fig. 1 as a detail ofFig. 1 ,
Die in
Die Besonderheit des in
- 11
- Vorrichtungcontraption
- 22
- Ausgangsmaterialstarting material
- 33
- Vorlagebehälterstorage container
- 44
- WasserdampfSteam
- 55
- Stoffschneckefabric screw
- 66
- KocherStove
- 77
- Defibratordefibrator
- 88th
- Blasrohrblowpipe
- 99
- Beleimungsstationgluing station
- 1010
- Bindemittelbinder
- 1111
- Trocknerdryer
- 1212
- Luftair
- 1313
- Zykloncyclone
- 1414
- Faserbehälterfiber container
- 1515
- Abtrenneinrichtungseparating
- 1616
- Teil des WasserdampfsPart of the water vapor
- 1717
- Keramikfilterceramic filter
- 1818
- Teilbereichsubregion
- 1919
- Wandungwall
- 2020
- Auffangleitungdrip line
- 2121
- VentilValve
- 2222
- VentilValve
- 2323
- Druckleitungpressure line
Claims (12)
- Method for separating steam from lignocellulose containing fibres, wherein the fibres are refined wetly and forwarded to a dryer (11) through a blow line (8), and wherein steam (16) is separated from the fibres in front of the dryer (11), characterised in that a part (16) of the steam is discharged from the fibres through a porous partial area (18) of a wall (19) of the blow line (8).
- Method of claim 1, characterised in that 5 to 15 % of the entire steam in the blow line (8) are discharged through the porous partial area (18).
- Method of claim 1 or 2, characterised in that the steam (16) is discharged prior to applying binder to the fibres in the blow line (8).
- Method of any of the claims 1 to 3, characterised in that the discharged steam (16) is used for preheating the starting material (2) prior to being refined.
- Method of any of the claims 1 to 4, characterised in that the porous partial area (18) of the wall (19) is at intervals subjected to a counter pressure from the outside.
- Method of claim 5, characterised in that different sections of the porous partial area (18) of the wall (19) are subjected to the counter pressure from the outside at different points in time.
- Apparatus (1) for separating steam from lignocellulose containing fibres comprising a blow line (8) through which the wetly refined fibres are forwarded to a dryer (11), and a separation device (15) to separate steam (16) from the fibres in front of the dryer (11), characterised in that the separation device (15) includes a porous partial area (18) of the wall (19) of the blow line (8) to discharge a part (16) of the steam out of the blow line (8) in this partial area (18).
- Apparatus of claim 7, characterised in that the porous partial area (18) of the wall (19) is formed by a ceramic filter (17).
- Apparatus of claim 7, characterised in that the porous partial area of the wall (19) is provided in front of a binder application station (10) in the blow line (8).
- Apparatus of any of the claims 7 to 9, characterised in that a back flow line for the steam (16) in which the steam is under pressure extends from the separation device (15) to a refining device for the starting material (2).
- Apparatus of any of the claims 7 to 10, characterised in that a back flush device is provided for the porous partial area (18) of the blow line (8) to subject it to a counter pressure.
- Apparatus of claim 11, characterised in that the porous partial area (18) is divided in sections which are subjectable to the counter pressure at different point in time.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610012521 DE102006012521B3 (en) | 2006-03-18 | 2006-03-18 | Method and device for producing shaped articles, in particular sheets, from lignocellulose-containing fibers |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1834747A2 EP1834747A2 (en) | 2007-09-19 |
EP1834747A3 EP1834747A3 (en) | 2008-06-11 |
EP1834747B1 true EP1834747B1 (en) | 2012-07-11 |
Family
ID=38006610
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP20070005559 Not-in-force EP1834747B1 (en) | 2006-03-18 | 2007-03-19 | Method and apparatus for separating steam from lignocellulosic fibres |
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EP (1) | EP1834747B1 (en) |
DE (1) | DE102006012521B3 (en) |
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CN103256796B (en) * | 2013-04-25 | 2015-04-15 | 江阴骏华纺织科技有限公司 | Collagen fiber drier |
AT514330B1 (en) * | 2013-08-01 | 2014-12-15 | Andritz Ag Maschf | Plant and method for processing fibrous materials |
SE1950263A1 (en) * | 2019-03-01 | 2020-06-30 | Valmet Oy | System and process for refining lignocellulosic biomass material |
CN112476697A (en) * | 2020-11-09 | 2021-03-12 | 常德宜居建筑材料有限公司 | Integrated forming device for medium density fiberboard and manufacturing method thereof |
SE544371C2 (en) * | 2021-06-15 | 2022-04-26 | Valmet Oy | Steam separator |
CN114102789B (en) * | 2021-11-12 | 2023-04-07 | 浙江品阁木业有限公司 | Dewatering device of modified fiberboard raw material |
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DD65845A5 (en) * | 1967-08-19 | 1969-03-05 | Fa Fritz Homann Gmbh | Method and device for the production of molded pieces of wood fibers, in particular wood fiber boards |
US4193206A (en) * | 1977-03-08 | 1980-03-18 | Uop Inc. | Processes for drying sewage sludge and filtering water |
US4888095A (en) * | 1989-05-25 | 1989-12-19 | Appleton Mills | Method for extracting water from a paper web in a papermaking machine using a ceramic foam member |
DE19944110A1 (en) * | 1999-09-15 | 2001-03-22 | Kufferath Andreas Gmbh | Dewatering of suspensions which are weak in shear, employs screw press operated at high speed in cross flow filtration to prevent filter cake formation, with solidification only at outlet |
SE517372C2 (en) * | 2000-10-06 | 2002-06-04 | Metso Paper Inc | Method and apparatus for separating steam and gas from glued or unpinned fiber pulp produced by a refiner |
US7368037B2 (en) * | 2003-05-21 | 2008-05-06 | Masonite Corporation | Refiner steam separation system for reduction of dryer emissions |
-
2006
- 2006-03-18 DE DE200610012521 patent/DE102006012521B3/en not_active Expired - Fee Related
-
2007
- 2007-03-19 EP EP20070005559 patent/EP1834747B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
EP1834747A3 (en) | 2008-06-11 |
DE102006012521B3 (en) | 2007-10-18 |
EP1834747A2 (en) | 2007-09-19 |
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