EP3027806A1 - System and method for processing fibrous materials - Google Patents

System and method for processing fibrous materials

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Publication number
EP3027806A1
EP3027806A1 EP14753201.4A EP14753201A EP3027806A1 EP 3027806 A1 EP3027806 A1 EP 3027806A1 EP 14753201 A EP14753201 A EP 14753201A EP 3027806 A1 EP3027806 A1 EP 3027806A1
Authority
EP
European Patent Office
Prior art keywords
steam
damper
line
digester
pulp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14753201.4A
Other languages
German (de)
French (fr)
Other versions
EP3027806B1 (en
Inventor
Clemens SEIDL
Christian RADHUBER
Reinhard Schlager
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Andritz AG
Original Assignee
Andritz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Andritz AG filed Critical Andritz AG
Priority to PL14753201T priority Critical patent/PL3027806T3/en
Publication of EP3027806A1 publication Critical patent/EP3027806A1/en
Application granted granted Critical
Publication of EP3027806B1 publication Critical patent/EP3027806B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C7/00—Digesters

Definitions

  • the invention relates to a system for processing
  • Refiner connected via a blow pipe with a dryer
  • the invention further relates to a method for
  • Raw material e.g. Wood chips
  • a pre-steam a cooker e.g. Wood chips
  • a refiner and a blower is fed to a dryer.
  • the invention is therefore based on the object to provide a system and a method in which the energy expenditure u.a. can be reduced for drying.
  • a device for the continuous discharge of steam is arranged in the blowpipe and that a discharge opening for steam from the device via a steam line to the pre-damper and / or the digester is connected.
  • Raw materials are introduced into the pre-damping and / or in the digester.
  • This device must be sealed against the environment. The discharge from the
  • this problem can be solved by the device being in open communication with the downstream one
  • Blowing line is standing. As in the establishment only part of the
  • the device has a pre-damper 1, the to
  • the throughput of pulp-steam mixture can be adjusted by means of a first blow valve 8 on the refiner 9. Before the dryer 7, a device 10 for Beieimen the pulp-steam mixture may be arranged in the blowpipe 6. Of the
  • Preheater 1, cooker 4 and refiner 9 can be over
  • Lines 11, 12, 13, 14 are supplied with live steam.
  • a device 15 for the continuous discharge of steam is arranged in the blowpipe, which is preferably a cyclone, which separates excess steam, which is not required for transport of the fibers, by centrifugal force from the pulp-steam mixture.
  • This excess steam is passed through a dip tube 16 of the cyclone 15 and further through a Steam line 17 discharged.
  • This steam line 17 is subsequently divided and the excess steam can now be supplied to the boiler 4 either via a first branch line 18 to the pre-dam 1 or a second branch line 19. Since the vapor pressure in the second branch line 19 will generally not be large enough, there is still a thermal one in it
  • the cyclone 15 is in open communication with the
  • a further blowing valve 21 is arranged in the blowing line 6 in the flow direction after the cyclone 15 and then a pressure measuring device 22, with which the pressure in the blowing line 6 is measured.
  • a pressure measuring device 22 with which the pressure in the blowing line 6 is measured.
  • Branch line 18 or a valve 24 in the second branch line 19 is opened. It is also possible in principle to open both valves 23, 24 simultaneously or partially in order to supply both the pre-damper 1 and the cooker 4 with excess steam. In principle, it would also be possible to connect the steam line 17 with a valve installed therein directly only to the pre-damper 1, wherein the withdrawn excess steam could then just be supplied exclusively to the pre-damper 1.
  • a fiber switch 25 is arranged in the blowpipe 6, with which the pulp-steam flow can be passed either to the dryer 7 or to a start-cyclone 26 until the system has reached a stable operating condition.
  • the blow valve 8 In normal operation, the blow valve 8 is fully open.
  • the pulp-steam mixture is passed through the cyclone 15 and the fiber switch 25 is set in the direction of the dryer 7.
  • the valves 23, 24 are either open or closed depending on the pressure in the blowpipe 6 measured by the pressure measuring device 22, whereby either the suction pipe of the thermal vapor compressor 20 is supplied with steam or the steam is conducted into the pre-steaming vessel 1.
  • the suction pipe of the thermal vapor compressor 20 When the separated vapor is passed via the line 19 into the suction pipe of the vapor compressor 20, this steam can be brought with live steam via a line 27 to the vapor pressure of the digester 4.
  • the steam supply for the cooker 4 is regulated by the pressure in the cooker. Should by the
  • Pre-steam tank 1 live steam via line 12 are added. If the amount of steam withdrawn through the cyclone 15 and supplied via the line 18 is not required in its entirety, it will automatically come to the deposition of the steam via the pre-damping tank 1.
  • the amount of vapor taken depends on the minimum amount of steam required for the further transport or further processing of the fibrous-steam mixture and, on the other hand, that clumping of the fibers in the cyclone 15 or thereafter beyond an admissible extent should be avoided, and can take place via the valves 23, 24 and the blowing valve 21 are set.
  • the amount of steam taken is preferably
  • the fibrous-steam mixture before the cyclone contains 28% by weight of steam and, after the cyclone, 14% by weight of steam.
  • the difference of 14% by weight of extracted steam can be supplied to the pre-steaming container 1 and / or the digester 4 as described.
  • blow valve 8 after the refiner 9 in part and the blow valve 21 is fully opened after the cyclone 15 and the fiber-optic 25 in the direction of start cyclone 26.
  • the fiber switch 25 is switched in the direction of dryer 7. Then, the blowing valve 21 is slowly closed after the cyclone 15 until the pressure in the cyclone 15 increases. Then the blow valve 8 is slowly opened completely after the refiner 9 and the opening of the blow valve 21 is readjusted. Finally, one of the two valves 23, 24 is opened slowly after the dip tube 16 and the control

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

In order to recover steam when fibrous materials are being processed, wherein raw material to be processed, e.g., chips, is fed successively to a pre-steamer (1), a digester (4), a refiner (9) and through a blower line (6) to a dryer (7), steam is removed continuously from the fibrous material-steam mixture after the refiner (9) and before the dryer (7) and the steam removed is fed to the pre-steamer (1) and/or to the digester (4).

Description

Anlage und Verfahren zum Verarbeiten von Faserstoffen Plant and method for processing fibrous materials
Die Erfindung betrifft eine Anlage zum Verarbeiten von The invention relates to a system for processing
Faserstoffen mit einem Vordämpfer, einem Kocher und einem Fibers with a pre-damper, a cooker and a
Refiner, der über eine Blasleitung mit einem Trockner verbunden Refiner, connected via a blow pipe with a dryer
Die Erfindung betrifft des Weiteren ein Verfahren zum The invention further relates to a method for
Verarbeiten von Faserstoffen, bei dem zu verarbeitendes Processing of fibrous materials in which to be processed
Rohmaterial, z.B. Hackschnitzel, nacheinander einem Vordämpfe einem Kocher, einem Refiner und durch eine Blasleitung einem Trockner zugeführt wird. Raw material, e.g. Wood chips, one after the other a pre-steam a cooker, a refiner and a blower is fed to a dryer.
Zurzeit wird der Dampf, der gemeinsam mit den Fasern aus dem Refiner austritt, nicht rückgewonnen, sondern in den Trockner eingebracht. Dies stellt unter anderem einen erhöhten At present, the steam that emerges from the refiner together with the fibers is not recovered, but is introduced into the dryer. This raises among other things an elevated one
Energieaufwand für die Trocknung dar. Energy expenditure for the drying.
Der Erfindung liegt daher die Aufgabe zu Grunde, eine Anlage und ein Verfahren zu schaffen, bei welchen der Energieaufwand u.a. für die Trocknung verringert werden kann.  The invention is therefore based on the object to provide a system and a method in which the energy expenditure u.a. can be reduced for drying.
Gelöst wird diese Aufgabe bei einer Anlage der eingangs This problem is solved in a system of the beginning
genannten Art dadurch, dass in der Blasleitung eine Einrichtung zum kontinuierlichen Austragen von Dampf angeordnet ist und dass eine Austragöffnung für Dampf aus der Einrichtung über eine Dampfleitung mit dem Vordämpfer und/oder dem Kocher verbunden ist . mentioned type in that a device for the continuous discharge of steam is arranged in the blowpipe and that a discharge opening for steam from the device via a steam line to the pre-damper and / or the digester is connected.
Bei einem Verfahren der eingangs genannten Art wird diese In a method of the type mentioned is this
Aufgabe dadurch gelöst, dass dem Faserstoff-Dampf-Gemisch nach dem Refiner und vor dem Trockner kontinuierlich Dampf entnommen wird und dass der entnommene Dampf dem Vordämpfer und/oder dem Kocher zugeführt wird. Durch den Einsatz einer Einrichtung, vorzugsweise eines Zyklons, zum kontinuierlichen Austragen von Dampf kann Überschussdampf abgetrennt werden, der nicht zum Transport der Faser benötigt wird und wiederverwendet werden kann. Dadurch wird der Trockner thermisch entlastet und so Energie eingespart. Weiters kann das zu einer Reduktion von Emissionen am Trockner führen. Der abgezogene Überschussdampf kann direkt zur Vorwärmung des Problem solved in that the pulp-steam mixture after the refiner and before the dryer continuously steam is removed and that the extracted steam is supplied to the pre-damper and / or the digester. By using a device, preferably a cyclone, for the continuous discharge of steam, excess vapor can be separated, which is not needed to transport the fiber and can be reused. This thermally relieves the dryer and thus saves energy. Furthermore, this can lead to a reduction of emissions at the dryer. The withdrawn excess steam can directly to preheat the
Rohmaterials in den Vordämpfbehälter und/oder auch in den Kocher eingebracht werden. Raw materials are introduced into the pre-damping and / or in the digester.
Es gibt verschiedene Bestrebungen, den Dampf aus dem Faser- Dampf-Gemisch abzutrennen. Dies kann mit Faserzentrifugen, There are various attempts to separate the steam from the fiber-steam mixture. This can be done with fiber centrifuges,
Zyklonen oder anderen auf Zentrifugalkraft beruhenden Cyclones or other based on centrifugal force
Separatoren bewerkstelligt werden. Dabei muss diese Einrichtung gegen die Umgebung abgedichtet werden. Der Austrag aus der Separators be accomplished. This device must be sealed against the environment. The discharge from the
Einrichtung erfolgt daher z.B. über Zellradschleusen. Dies hat zur Folge, dass Fasern teilweise verdichtet werden und z.B. die für MDF-Produktion notwendige, klassische Blasleitungsbeleimung nicht oder schlechter funktioniert. Bei einer Trockenbeleimung wiederum führt die Verklumpung der Fasern zu Schwierigkeiten in der weiteren Verarbeitung. Setup is therefore done e.g. via rotary valves. As a result, fibers are partially densified and e.g. the classic Blasleitungsbeleimung necessary for MDF production does not work or works worse. In dry gluing, in turn, the clumping of the fibers leads to difficulties in further processing.
In einer bevorzugten Ausführungsform der Erfindung kann dieses Problem dadurch gelöst werden, dass die Einrichtung in offener Verbindung mit der in Strömungsrichtung weiterführenden In a preferred embodiment of the invention, this problem can be solved by the device being in open communication with the downstream one
Blasleitung steht. Da in der Einrichtung nur ein Teil des Blowing line is standing. As in the establishment only part of the
Dampfes entnommen wird, braucht die Einrichtung abströmseitig zur Blasleitung hin nicht abgedichtet werden und das Faserstoff- Dampf-Gemisch kann mit einer ausreichenden Menge an Dampf in der Blasleitung problemlos weiter gefördert werden, ohne dass es zu einem Verklumpen der Fasern kommt. Weitere bevorzugte Ausführungsformen und Durchführungsformen der Erfindung sind Gegenstand der übrigen Unteransprüche. Steam is removed, the device needs downstream of the blast line not sealed and the pulp-steam mixture can easily be further promoted with a sufficient amount of steam in the blowpipe, without causing a clumping of the fibers. Further preferred embodiments and embodiments of the invention are the subject of the remaining subclaims.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines bevorzugten Further features and advantages of the invention will become apparent from the following description of a preferred
Ausführungsbeispiels der Erfindung unter Bezugnahme auf die angeschlossene Zeichnung, in der schematisch eine Anlage zum Verarbeiten von Faserstoffen gezeigt ist.  Embodiment of the invention with reference to the accompanying drawing, in which a plant for processing fibrous materials is shown schematically.
Die Vorrichtung weist einen Vordämpfer 1 auf, dem zu The device has a pre-damper 1, the to
verarbeitendes Rohmaterial, z.B. Hackschnitzel, über eine processing raw material, e.g. Wood chips, over one
Leitung 2 zugeführt wird. Nach dem Vordämpfer 1 wird das Line 2 is supplied. After the pre-damper 1 is the
vorgedämpfte Rohmaterial über eine StopfSchnecke 3, einen Kocher 4 und einen Kocheraustrag 5 anschließend einem Refiner 9 pre-steamed raw material via a stuffing screw 3, a cooker 4 and a Kocheraustrag 5 then a refiner. 9
zugeführt. Nach dem Refiner 9 wird das so aufbereitete fed. After Refiner 9, this is processed
Faserstoff-Dampf-Gemisch durch eine Blasleitung 6 einem Trockner 7 zugeführt. Pulp-steam mixture fed through a blowpipe 6 a dryer 7.
Der Durchsatz an Faserstoff-Dampf-Gemisch kann mittels eines ersten Blasventils 8 am Refiner 9 eingestellt werden. Vor dem Trockner 7 kann eine Einrichtung 10 zum Beieimen des Faserstoff- Dampf-Gemischs in der Blasleitung 6 angeordnet sein. Der The throughput of pulp-steam mixture can be adjusted by means of a first blow valve 8 on the refiner 9. Before the dryer 7, a device 10 for Beieimen the pulp-steam mixture may be arranged in the blowpipe 6. Of the
Vordämpfer 1, der Kocher 4 und der Refiner 9 können über Preheater 1, cooker 4 and refiner 9 can be over
Leitungen 11, 12, 13, 14 mit Frischdampf versorgt werden. Lines 11, 12, 13, 14 are supplied with live steam.
Dieser Aufbau ist an sich aus dem Stand der Technik bekannt. This structure is known per se from the prior art.
Erfindungsgemäß ist in der Blasleitung eine Einrichtung 15 zum kontinuierlichen Austragen von Dampf angeordnet, die bevorzugt ein Zyklon ist, welcher überschüssigen Dampf, der nicht zum Transport der Fasern benötigt wird, durch Fliehkraft aus dem Faserstoff-Dampf-Gemisch abtrennt. Dieser überschüssige Dampf wird durch ein Tauchrohr 16 des Zyklons 15 und weiter durch eine Dampfleitung 17 abgeführt. Diese Dampfleitung 17 teilt sich in weiterer Folge und der überschüssige Dampf kann nun entweder über eine erste Zweigleitung 18 dem Vordämpfer 1 oder eine zweite Zweigleitung 19 dem Kocher 4 zugeführt werden. Da der Dampfdruck in der zweiten Zweigleitung 19 in der Regel nicht groß genug sein wird, ist in dieser noch ein thermischer According to the invention, a device 15 for the continuous discharge of steam is arranged in the blowpipe, which is preferably a cyclone, which separates excess steam, which is not required for transport of the fibers, by centrifugal force from the pulp-steam mixture. This excess steam is passed through a dip tube 16 of the cyclone 15 and further through a Steam line 17 discharged. This steam line 17 is subsequently divided and the excess steam can now be supplied to the boiler 4 either via a first branch line 18 to the pre-dam 1 or a second branch line 19. Since the vapor pressure in the second branch line 19 will generally not be large enough, there is still a thermal one in it
Dampfkompressor 20 angeordnet. Steam compressor 20 arranged.
Der Zyklon 15 steht in offener Verbindung mit der The cyclone 15 is in open communication with the
weiterführenden Blasleitung 6, sodass es am Ausgang des Zyklons 15 in die Blasleitung 6 nicht zu einem Verdichten oder continuing blast line 6, so that it is not at the output of the cyclone 15 in the blowpipe 6 to a compression or
Verklumpen der Fasern kommt. Dies ist möglich, da durch den Zyklon nur ein Teil des Dampfes entnommen und der verbleibende Anteil des Dampfes zum Weiterfördern der Fasern verwendet wird, sodass der Zyklon nicht vollständig gegen die anschließende Leitung 6 abgedichtet werden muss. Clumping of the fibers comes. This is possible because only part of the vapor is removed by the cyclone and the remaining portion of the steam is used to convey the fibers further, so that the cyclone does not have to be completely sealed against the subsequent line 6.
Als Drossel für die Druckregelung ist in Strömungsrichtung nach dem Zyklon 15 ein weiteres Blasventil 21 in der Blasleitung 6 angeordnet und danach eine Druckmesseinrichtung 22, mit welcher der Druck in der Blasleitung 6 gemessen wird. In Abhängigkeit vom kontinuierlich gemessenen Druck wird über die Steuerung der Anlage bei Bedarf entweder ein Ventil 23 in der ersten As a throttle for the pressure control, a further blowing valve 21 is arranged in the blowing line 6 in the flow direction after the cyclone 15 and then a pressure measuring device 22, with which the pressure in the blowing line 6 is measured. Depending on the continuously measured pressure is on the control of the system, if necessary, either a valve 23 in the first
Zweigleitung 18 oder ein Ventil 24 in der zweiten Zweigleitung 19 geöffnet. Es ist grundsätzlich auch möglich, beide Ventile 23, 24 gleichzeitig bzw. teilweise zu öffnen, um sowohl dem Vordämpfer 1 als auch dem Kocher 4 Überschussdampf zuzuführen. Grundsätzlich wäre es auch möglich, die Dampfleitung 17 mit einem darin eingebauten Ventil direkt nur mit dem Vordämpfer 1 zu verbinden, wobei der entnommene Überschussdampf dann eben ausschließlich dem Vordämpfer 1 zugeführt werden könnte. Vor dem Trockner 7 ist eine Faserweiche 25 in der Blasleitung 6 angeordnet, mit welcher der Faserstoff-Dampf-Strom entweder zum Trockner 7 oder zu einem Start-Zyklon 26 geleitet werden kann, bis die Anlage einen stabilen Betriebszustand erreicht hat. Branch line 18 or a valve 24 in the second branch line 19 is opened. It is also possible in principle to open both valves 23, 24 simultaneously or partially in order to supply both the pre-damper 1 and the cooker 4 with excess steam. In principle, it would also be possible to connect the steam line 17 with a valve installed therein directly only to the pre-damper 1, wherein the withdrawn excess steam could then just be supplied exclusively to the pre-damper 1. In front of the dryer 7, a fiber switch 25 is arranged in the blowpipe 6, with which the pulp-steam flow can be passed either to the dryer 7 or to a start-cyclone 26 until the system has reached a stable operating condition.
Im Normalbetrieb ist das Blasventil 8 vollständig offen. Das Faserstoff-Dampf-Gemisch wird durch den Zyklon 15 geleitet und die Faserweiche 25 ist auf Richtung Trockner 7 gestellt. Die Ventile 23, 24 sind abhängig vom Druck in der Blasleitung 6, der mit der Druckmesseinrichtung 22 gemessen wird, entweder geöffnet oder geschlossen, wodurch entweder das Saugrohr des thermischen Dampfkompressors 20 mit Dampf versorgt oder der Dampf in den Vordämpfbehälter 1 geleitet wird. Wenn der abgeschiedene Dampf über die Leitung 19 in das Saugrohr des Dampfkompressors 20 geleitet wird, kann dieser Dampf mit Frischdampf über eine Leitung 27 auf den Dampfdruck des Kochers 4 gebracht werden. Die DampfVersorgung für den Kocher 4 wird über den Druck im Kocher geregelt. Sollte der durch den In normal operation, the blow valve 8 is fully open. The pulp-steam mixture is passed through the cyclone 15 and the fiber switch 25 is set in the direction of the dryer 7. The valves 23, 24 are either open or closed depending on the pressure in the blowpipe 6 measured by the pressure measuring device 22, whereby either the suction pipe of the thermal vapor compressor 20 is supplied with steam or the steam is conducted into the pre-steaming vessel 1. When the separated vapor is passed via the line 19 into the suction pipe of the vapor compressor 20, this steam can be brought with live steam via a line 27 to the vapor pressure of the digester 4. The steam supply for the cooker 4 is regulated by the pressure in the cooker. Should by the
thermischen Dampfkompressor 20 zugeführte Dampf nicht thermal vapor compressor 20 steam supplied not
ausreichen, wird Frischdampf über die Leitung 13 direkt sufficient, live steam via the line 13 directly
zugeführt . supplied.
Wenn der abgeschiedene Dampf direkt in den Vordämpfbehälter 1 geleitet wird und die zurückgewonnene Dampfmenge nicht zum If the separated steam is passed directly into the pre-steaming tank 1 and the amount of steam recovered not to
Einstellen der Temperatur ausreicht, kann in den Setting the temperature is sufficient in the
Vordämpfbehälter 1 Frischdampf über die Leitung 12 zugegeben werden. Sollte die durch den Zyklon 15 entnommene und über die Leitung 18 zugeführte Dampfmenge nicht zur Gänze benötigt werden, wird es automatisch zum Abscheiden des Dampfes über den Vordämpfbehälter 1 kommen. Pre-steam tank 1 live steam via line 12 are added. If the amount of steam withdrawn through the cyclone 15 and supplied via the line 18 is not required in its entirety, it will automatically come to the deposition of the steam via the pre-damping tank 1.
Die dem Faserstoff-Dampf-Gemisch durch den Zyklon 15 zu entnehmende Dampfmenge richtet sich einerseits nach der für den Weitertransport bzw. die Weiterverarbeitung des Faserstoff- Dampf-Gemischs erforderlichen Mindestdampfmenge und andererseits danach, dass ein Verklumpen der Fasern im Zyklon 15 oder danach über ein zulässiges Ausmaß hinaus vermieden werden soll, und kann über die Ventile 23, 24 und das Blasventil 21 eingestellt werden. Die entnommene Dampfmenge beträgt vorzugsweise The the pulp-steam mixture through the cyclone 15 to On the one hand, the amount of vapor taken depends on the minimum amount of steam required for the further transport or further processing of the fibrous-steam mixture and, on the other hand, that clumping of the fibers in the cyclone 15 or thereafter beyond an admissible extent should be avoided, and can take place via the valves 23, 24 and the blowing valve 21 are set. The amount of steam taken is preferably
wenigstens 2 Gew.%, besonders bevorzugt wenigstens 10 Gew.% Dampf und vorzugsweise höchstens 70 Gew.%, besonders bevorzugt höchstens 20 Gew.%. Bei diesen Anteilen von entnommenem und in die Anlage zurückgeführtem Dampf ist auf der einen Seite eine merkliche Energieersparnis gegeben, auf der anderen Seite ist gewährleistet, dass die Weiterförderung der Fasern nach dem Zyklon 15 noch zuverlässig funktioniert. Beispielsweise enthält das Faserstoff-Dampf-Gemisch vor dem Zyklon 28 Gew.% Dampf und nach dem Zyklon 14 Gew.% Dampf. Die Differenz von 14 Gew.% entnommenem Dampf kann wie beschrieben dem Vordämpfbehälter 1 und/oder dem Kocher 4 zugeführt werden. Zum Starten der Anlage wird zunächst das Blasventil 8 at least 2% by weight, particularly preferably at least 10% by weight of steam and preferably at most 70% by weight, particularly preferably at most 20% by weight. At these proportions of withdrawn and returned to the system steam is on the one hand a significant energy savings given, on the other hand, it is ensured that the further promotion of the fibers after the cyclone 15 still works reliably. For example, the fibrous-steam mixture before the cyclone contains 28% by weight of steam and, after the cyclone, 14% by weight of steam. The difference of 14% by weight of extracted steam can be supplied to the pre-steaming container 1 and / or the digester 4 as described. To start the system, first the blow valve 8
geschlossen und das System auf Betriebstemperatur aufgeheizt. Anschließend wird das Blasventil 8 nach dem Refiner 9 zum Teil und das Blasventil 21 nach dem Zyklon 15 ganz geöffnet und die Faserweiche 25 in Richtung Startzyklon 26 gestellt. Nach closed and the system heated to operating temperature. Subsequently, the blow valve 8 after the refiner 9 in part and the blow valve 21 is fully opened after the cyclone 15 and the fiber-optic 25 in the direction of start cyclone 26. To
Erreichen der gewünschten Faserqualität wird die Faserweiche 25 in Richtung Trockner 7 umgeschaltet. Dann wird das Blasventil 21 nach dem Zyklon 15 langsam geschlossen, bis der Druck im Zyklon 15 steigt. Daraufhin wird das Blasventil 8 nach dem Refiner 9 langsam vollständig geöffnet und die Öffnung des Blasventils 21 nachgeregelt. Schließlich wird eines der beide Ventile 23, 24 nach dem Tauchrohr 16 langsam geöffnet und die Regelung Achieving the desired fiber quality, the fiber switch 25 is switched in the direction of dryer 7. Then, the blowing valve 21 is slowly closed after the cyclone 15 until the pressure in the cyclone 15 increases. Then the blow valve 8 is slowly opened completely after the refiner 9 and the opening of the blow valve 21 is readjusted. Finally, one of the two valves 23, 24 is opened slowly after the dip tube 16 and the control
aktiviert . Zum Stoppen der Anlage wird der Durchsatz reduziert und das/die offene (n) Ventil (e) 23, 24 geschlossen. Das Blasventil 8 hinter dem Refiner 9 wird dann gedrosselt und die Faserweiche 25 auf Richtung Start-Zyklon 26 gestellt. Die Anlage kann dann ganz herunter gefahren werden. activated. To stop the system, the flow rate is reduced and the open valve (s) 23, 24 closed. The blowing valve 8 behind the refiner 9 is then throttled and placed the fiber-optic 25 towards the start-cyclone 26. The system can then be driven down completely.

Claims

Patentansprüche : Claims:
1. Anlage zum Verarbeiten von Faserstoffen mit einem Vordämpfer (1), einem Kocher (4) und einem Refiner (9), der über eine Blasleitung (6) mit einem Trockner (7) verbunden ist, dadurch gekennzeichnet, dass in der Blasleitung (6) eine Einrichtung (15) zum kontinuierlichen Austragen eines Teils des Dampfes angeordnet ist und dass eine Austragöffnung (16) für Dampf aus der Einrichtung (15) über eine Dampfleitung (17, 18, 19) mit dem Vordämpfer (1) und/oder dem Kocher (4) verbunden ist. 1. plant for processing fibrous materials with a pre-damper (1), a digester (4) and a refiner (9), which is connected via a blow pipe (6) with a dryer (7), characterized in that in the blowpipe ( 6) means (15) for continuously discharging a part of the steam is arranged and that a discharge opening (16) for steam from the device (15) via a steam line (17, 18, 19) with the pre-damper (1) and / or the cooker (4) is connected.
2. Anlage nach Anspruch 1, dadurch gekennzeichnet, dass die 2. Plant according to claim 1, characterized in that the
Einrichtung (15) ein Zyklon ist und die Austragöffnung (16) von einem Tauchrohr gebildet wird.  Device (15) is a cyclone and the discharge opening (16) is formed by a dip tube.
3. Anlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass in der Blasleitung (6) in Strömungsrichtung nach der 3. Plant according to claim 1 or 2, characterized in that in the blowpipe (6) in the flow direction of the
Einrichtung (15) eine Druckmesseinrichtung (22) angeordnet ist .  Device (15) a pressure measuring device (22) is arranged.
4. Anlage nach Anspruch 3, dadurch gekennzeichnet, dass in der Dampfleitung (17) wenigstens ein Ventil (23,24) angeordnet ist, das steuerungstechnisch mit der Druckmesseinrichtung (22) verbunden ist. 4. Plant according to claim 3, characterized in that in the steam line (17) at least one valve (23,24) is arranged, which is connected in terms of control technology with the pressure measuring device (22).
5. Anlage nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass sich die Dampfleitung (17) in eine erste Zweigleitung (18) und eine zweite Zweigleitung (19) teilt, dass die erste Zweigleitung (18) mit dem Vordämpfer (1) und die zweite Zweigleitung (19) mit dem Kocher (4) verbunden ist und dass in jeder Zweigleitung (18, 19) ein Ventil (23, 24) 5. Plant according to claim 3 or 4, characterized in that the steam line (17) in a first branch line (18) and a second branch line (19) shares that the first branch line (18) with the pre-damper (1) and the second branch line (19) is connected to the digester (4) and that in each branch line (18, 19) a valve (23, 24)
angeordnet ist, das steuerungstechnisch mit der Druckmesseinrichtung (22) verbunden ist. is arranged, the control technology with the Pressure measuring device (22) is connected.
6. Anlage nach Anspruch 5, dadurch gekennzeichnet, dass in der zweiten Zweigleitung (19) ein thermischer Dampfkompressor (20) angeordnet ist. 6. Plant according to claim 5, characterized in that in the second branch line (19), a thermal vapor compressor (20) is arranged.
7. Anlage nach einem der Ansprüche 3 bis 6, dadurch 7. Plant according to one of claims 3 to 6, characterized
gekennzeichnet, dass in der Blasleitung (6) nach der  characterized in that in the blowpipe (6) after the
Einrichtung (15) und vor der Druckmesseinrichtung (22) ein Drosselventil (21) angeordnet ist.  Device (15) and in front of the pressure measuring device (22) a throttle valve (21) is arranged.
8. Anlage nach einem der Ansprüche 1 bis 7, dadurch  8. Plant according to one of claims 1 to 7, characterized
gekennzeichnet, dass die Einrichtung (15) in offener  characterized in that the device (15) in open
Verbindung mit der in Strömungsrichtung weiterführenden Blasleitung (6) steht.  Connection with the continuing in the flow direction blowing line (6).
9. Verfahren zum Verarbeiten von Faserstoffen, bei dem zu 9. A process for processing fibrous materials, in which
verarbeitendes Rohmaterial, z.B. Hackschnitzel, nacheinander einem Vordämpfer (1), einem Kocher (4), einem Refiner (9) und durch eine Blasleitung (6) einem Trockner (7) zugeführt wird, dadurch gekennzeichnet, dass dem Faserstoff-Dampf- Gemisch nach dem Refiner (9) und vor dem Trockner (7) kontinuierlich ein Teil des Dampfes entnommen wird und dass der entnommene Dampf dem Vordämpfer (1) und/oder dem Kocher (4) zugeführt wird.  processing raw material, e.g. Wood chips, successively a pre-damper (1), a digester (4), a refiner (9) and a blower (6) is fed to a dryer (7), characterized in that the pulp-steam mixture after the refiner (9 ) and in front of the dryer (7) continuously a part of the steam is removed and that the extracted steam is supplied to the pre-damper (1) and / or the cooker (4).
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass dem Faserstoff-Dampf-Gemisch durch Fliehkraft, z.B. in einem Zyklon, kontinuierlich Dampf entnommen wird. 10. The method according to claim 9, characterized in that the pulp-steam mixture by centrifugal force, e.g. in a cyclone, steam is continuously withdrawn.
11. Verfahren nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass der Druck in der Blasleitung (6) gemessen wird, nachdem Dampf entnommen wurde und dass entnommener Dampf abhängig vom gemessenen Druck dem Vordämpfer (1) und/oder dem Kocher (4) zugeführt wird. 11. The method according to claim 9 or 10, characterized in that the pressure in the blowpipe (6) is measured after steam has been taken and the steam removed depending on the measured pressure of the pre-damper (1) and / or the digester (4) is supplied.
12. Verfahren nach einem der Ansprüche 9 bis 11, dadurch 12. The method according to any one of claims 9 to 11, characterized
gekennzeichnet, dass der Dampfdruck des entnommenen Dampfes erhöht wird, bevor er dem Kocher (4) zugeführt wird.  characterized in that the vapor pressure of the extracted vapor is increased before it is supplied to the digester (4).
13. Verfahren nach einem der Ansprüche 9 bis 12, dadurch 13. The method according to any one of claims 9 to 12, characterized
gekennzeichnet, dass dem Faserstoff-Dampf-Gemisch wenigstens 2 Gew.%, vorzugsweise wenigstens 10 Gew. % Dampf entnommen wird.  characterized in that at least 2 wt.%, Preferably at least 10 wt.% Steam is taken from the pulp-steam mixture.
14. Verfahren nach einem der Ansprüche 9 bis 13, dadurch 14. The method according to any one of claims 9 to 13, characterized
gekennzeichnet, dass dem Faserstoff-Dampf-Gemisch höchstens 70 Gew.%, vorzugsweise höchstens 20 Gew.% Dampf entnommen wird .  characterized in that the pulp-steam mixture at most 70 wt.%, Preferably at most 20 wt.% Steam is removed.
15. Verfahren nach einem der Ansprüche 10 bis 14, dadurch 15. The method according to any one of claims 10 to 14, characterized
gekennzeichnet, dass das Faserstoff-Dampf-Gemisch aus der Einrichtung durch eine offene Verbindung zur Blasleitung (6) kontinuierlich weiter gefördert wird.  characterized in that the pulp-steam mixture from the device is continuously conveyed through an open connection to the blow pipe (6).
EP14753201.4A 2013-08-01 2014-07-17 System and method for processing fibrous materials Active EP3027806B1 (en)

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ATA617/2013A AT514330B1 (en) 2013-08-01 2013-08-01 Plant and method for processing fibrous materials
PCT/EP2014/001956 WO2015014451A1 (en) 2013-08-01 2014-07-17 System and method for processing fibrous materials

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WO2017060423A1 (en) 2015-10-08 2017-04-13 Koninklijke Kpn N.V. Enhancing a region of interest in video frames of a video stream
LT3872256T (en) 2020-02-28 2022-04-11 Fiberboard Gmbh Method and treatment system for reducing volatile organic compounds from wood chips

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US4072274A (en) * 1977-02-08 1978-02-07 Yhtyneet Paperitehtaat Osakeyhtio Jylhavaara Procedure and apparatus for preparing hot groundwood
SE429874B (en) * 1982-02-16 1983-10-03 Sunds Defibrator SET AND DEVICE FOR MANUFACTURING FIBER MASS AND LIGNOCELLULOSALLY MATERIAL
DE3728123A1 (en) * 1987-08-22 1989-03-02 Hoechst Ag METHOD FOR THE PRODUCTION OF FRINGED CELLULOSE MATERIAL, IN PARTICULAR WOOD FIBERS, FOR THE PRODUCTION OF FIBER PANELS
US7368037B2 (en) * 2003-05-21 2008-05-06 Masonite Corporation Refiner steam separation system for reduction of dryer emissions
DE102006012521B3 (en) * 2006-03-18 2007-10-18 Glunz Ag Method and device for producing shaped articles, in particular sheets, from lignocellulose-containing fibers
DE102008026677B3 (en) * 2008-06-04 2009-10-22 Kronotec Ag Drying lignocellulose fibers, for fiberboard production, has a separator to detach fibers from a steam flow for drying with recovered steam for heating the wood chip start material

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EP3027806B1 (en) 2017-05-03
RU2016103931A (en) 2017-09-04
PT3027806T (en) 2017-08-01
AT514330A4 (en) 2014-12-15
ES2635297T3 (en) 2017-10-03
RU2660056C2 (en) 2018-07-04

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