EP1348802A1 - Process and apparatus for dispersing a paper fibre slurry - Google Patents

Process and apparatus for dispersing a paper fibre slurry Download PDF

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Publication number
EP1348802A1
EP1348802A1 EP03005093A EP03005093A EP1348802A1 EP 1348802 A1 EP1348802 A1 EP 1348802A1 EP 03005093 A EP03005093 A EP 03005093A EP 03005093 A EP03005093 A EP 03005093A EP 1348802 A1 EP1348802 A1 EP 1348802A1
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EP
European Patent Office
Prior art keywords
steam
paper pulp
screw
heated
suspension
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Granted
Application number
EP03005093A
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German (de)
French (fr)
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EP1348802B1 (en
Inventor
Helmuth Dipl.Ing.Dr. Gabl
Andreas Dipl.Ing.Dr. Gorton-Hülgerth
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Andritz AG
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Andritz AG
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    • 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
    • D21D1/004—Methods of beating or refining including disperging or deflaking
    • 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
    • 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
    • D21D1/30—Disc mills
    • 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
    • D21D1/34—Other mills or refiners
    • D21D1/38—Other mills or refiners with horizontal shaft
    • 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
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor

Definitions

  • the invention relates to a method for dispersing a paper pulp, in which a pre-dewatered substance is heated, conveyed and in is dispersed in a disperser. It also relates to a device for Execution of the procedure.
  • Such a method or device are e.g. from the NO 302 186 B1 known.
  • the particular disadvantage is high outlay on equipment and also the space requirement of such a system.
  • Other such methods and devices are e.g. from the DE 199 54 246 A1 known.
  • a system is analogous to NO 302 186 B1 described, on the other hand, as a further possibility direct supply of steam between the grinding plates of the disperser is provided. The latter has the disadvantage that only a short dwell time is possible and does not achieve a complete and even warm-up can be.
  • the aim of the invention is therefore to propose a method with which one good and even heating with little equipment can be guaranteed and, if necessary, additionally Chemicals can be added before dispersion.
  • the invention is therefore characterized in that the paper pulp is heated immediately before entering the dispersion zone. So that can an additional unit, such as a heating screw, can be saved, still ensuring complete heating of all particles becomes.
  • the dispersion zone can be a well warmed up paper pulp are fed.
  • the paper pulp while mixing is being mixed can be a very even one Warming up can be achieved.
  • the pulp is heated by steam and is at the same time A vacuum is applied to the conveyor unit so that the steam can be targeted and the heat transfer to the paper pulp can be optimized.
  • the invention further relates to a device for dispersing a Paper pulp, with a feed device for steam, a conveyor unit and a disperger. It is characterized by the fact that Conveyor unit at least one inlet (nozzle or inlet openings) for steam. This means that just before the disperger Paper pulp can be heated and an additional heating unit omitted.
  • the delivery unit is designed as a mixing screw is an even mixing with steam and thus a uniform warm-up can be achieved.
  • At least one Spigot designed as a vacuum connection, so a targeted steam flow and optimal heat transfer can be achieved.
  • the conveyor unit for example mixing screw has a hollow shaft, the hollow shaft having spikes for interference can. This allows the steam to be directed along the conveyor path are fed, resulting in a more even distribution and thus Warming up leads.
  • Fig. 1 is a system according to the prior art
  • Fig. 2 is a plan view on a device according to the invention
  • Fig. 3 is a view of Fig. 2 according to arrow III
  • Fig. 4 shows a section through an inventive 5
  • FIG. 6 shows a special embodiment of the invention
  • FIG. 7 shows a section through Fig. 4 with a further variant of the invention.
  • a system according to the prior art is shown in which a screw press 1 for dewatering the paper fiber suspension is provided.
  • the dehydrated suspension is then with a Consistency of approx. 20 - 35%, advantageously 25 - 30%, via a shaft 2 a heater 3 supplied with rotating blades.
  • the heated suspension falls into a screw 4 for feeding Disperger 5.
  • the steam is the heater 3 through a steam line 6 supplied, with a part already inserted in the shaft 2 can be.
  • the suspension to be treated is over a Inlet 7 of the screw press 1 is fed and occurs as a plug 8 in the end.
  • the plug 8 at the end of the screw press 1 is used here as a vapor barrier.
  • FIG. 2 shows a top view of a device according to the invention.
  • Lines 10, 10 can also be seen here, via which the pulp suspension Steam or chemicals can be added.
  • Chemicals come in both liquid or gaseous bleach as well Hygiene chemicals such as Peroxide, caustic soda, chlorine, ozone or Dispersant in question.
  • Fig. 3 shows a view of Fig. 2 according to arrow III.
  • the screw press 1 is connected to the stuffing screw 8 'via a shaft 2.
  • the pulp suspension is further conveyed to the conveyor unit 9, In particular, feed screw is fed, the stuffing screw 8 ' also serves as a vapor barrier for the steam supplied through line 10.
  • the disperser 5 is then arranged behind the feed screw.
  • FIG. 4 shows a section through a device according to the invention.
  • Stubs 11 on the jacket 12 at the beginning of the conveyor unit or nozzle 11 'or 11 " be attached in the end part of the conveyor unit.
  • chemicals can also be added.
  • the steam is introduced via the nozzle 11, 11 'or 11 ", it can also a vacuum (against direction 14) is applied to the hollow shaft 13.
  • a vacuum (against direction 14) is applied to the hollow shaft 13.
  • steam can be introduced through the hollow shaft 13 and advantageously can be sucked off by nozzle 11.
  • you can chemicals are added through the nozzle 11 'or 11 ".
  • the suspension is then thoroughly warmed up and the disperser 5 mixed mixed.
  • FIG. 5 schematically shows the structure of the device according to the invention, steam is supplied in the direction 14 through the hollow shaft 13. about the length of the wave, the steam enters evenly at different points out.
  • the pulp suspension has a temperature of about 20 to 80 ° C, usually 40 - 60 ° C.
  • the excess steam is then through the Sockets 11, 11 'and 11 "are suctioned off. Sockets 11, 11', 11" can also as attached to the screw shell 12, all or part of the Extending channels can be executed.
  • the pulp suspension Before entering the The pulp suspension then has a temperature in the dispersion zone greater than 85 ° C.
  • Fig. 6 shows one way of supplying steam.
  • the on the hollow shaft 13th attached helix 15 is supported by a wall 18, so that a cavity 19 is formed.
  • the steam emerges from the hollow shaft 13 through openings 20 into the cavity 19 and is then through inlet openings 21, 21 'led into the pulp suspension.
  • Fig. 7 corresponds to a section along line VII-VII in Fig. 4.
  • the inside of the screw shell 12 running hollow shaft 13 has a plurality of mandrels 16 that can have different lengths.
  • the mandrels 16 are provided with inlet openings 21, 21 'in suspension ensure a distribution over the cross section of the conveyor unit 9.
  • the mandrels 16 can also be on their upper (away from the shaft) Be open at the end.

Abstract

In a process to disperse a suspension of paper fibres in water, the pre-dewatered suspension is heated and fed to a dispersion assembly. The paper fibres are esp. heated immediately prior to their surrender to the dispersion zone. The paper fibres are mixed during the steam heating process. A vacuum is applied to the conveyer system. After steam has passed through the paper suspension, cooled steam is discharged. chemical additives are introduced to the paper fibres during the heating process. Also claimed is a commensurate helical mixer assembly (9) having a housing (12) with inlets for the fibre and steam and a vacuum connection (11).

Description

Die Erfindung betrifft ein Verfahren zur Dispergierung eines Papierfaserstoffes, bei dem ein vorentwässerter Stoff aufgeheizt, gefördert und in einem Disperger dispergiert wird. Sie betrifft auch eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for dispersing a paper pulp, in which a pre-dewatered substance is heated, conveyed and in is dispersed in a disperser. It also relates to a device for Execution of the procedure.

Ein derartiges Verfahren bzw. eine derartige Vorrichtung sind z.B. aus der NO 302 186 B1 bekannt. Hier wird der Papierfaserstoff nach einer Entwässerungsschnecke einer Heizschnecke zugeführt, von wo der aufgeheizte Stoff in die Stopfschnecke für einen Disperger eingebracht wird. Im Disperger erfolgt dann die Dispergierung. Nachteilig ist insbesondere der hohe apparative Aufwand und auch Platzbedarf einer solchen Anlage. Weitere derartige Verfahren bzw. Vorrichtungen sind z.B. aus der DE 199 54 246 A1 bekannt. Einerseits wird hier eine Anlage analog zur NO 302 186 B1 beschrieben, andererseits als weitere Möglichkeit die direkte Zufuhr von Dampf zwischen die Mahlplatten des Dispergers vorgesehen. Letztere hat den Nachteil, dass nur eine kurze Verweilzeit möglich ist und dadurch keine vollständige und gleichmäßige Aufwärmung erzielt werden kann.Such a method or device are e.g. from the NO 302 186 B1 known. Here is the pulp after a dewatering screw fed to a heating screw, from where the heated Material is placed in the stuffing screw for a disperser. in the Dispersing then takes place. The particular disadvantage is high outlay on equipment and also the space requirement of such a system. Other such methods and devices are e.g. from the DE 199 54 246 A1 known. On the one hand, a system is analogous to NO 302 186 B1 described, on the other hand, as a further possibility direct supply of steam between the grinding plates of the disperser is provided. The latter has the disadvantage that only a short dwell time is possible and does not achieve a complete and even warm-up can be.

Ziel der Erfindung ist es daher ein Verfahren vorzuschlagen, mit dem eine gute und gleichmäßige Aufheizung mit geringem apparativen Aufwand gewährleistet werden kann und gegebenenfalls noch zusätzlich Chemikalien vor der Dispergierung zugegeben werden können.The aim of the invention is therefore to propose a method with which one good and even heating with little equipment can be guaranteed and, if necessary, additionally Chemicals can be added before dispersion.

Die Erfindung ist daher dadurch gekennzeichnet, dass der Papierfaserstoff unmittelbar vor Eintritt in die Dispergierzone aufgeheizt wird. Damit kann ein zusätzliches Aggregat, wie eine Heizschnecke, eingespart werden, wobei trotzdem eine vollständige Durchwärmung aller Partikel gewährleistet wird. Somit kann der Dispergierzone ein gut aufgewärmter Papierfaserstoff zugeführt werden.The invention is therefore characterized in that the paper pulp is heated immediately before entering the dispersion zone. So that can an additional unit, such as a heating screw, can be saved, still ensuring complete heating of all particles becomes. Thus, the dispersion zone can be a well warmed up paper pulp are fed.

Wenn nach einem vorteilhaften Merkmal der Erfindung der Papierfaserstoff während der Aufheizung durchmischt wird, kann eine sehr gleichmäßige Aufwärmung erreicht werden. If according to an advantageous feature of the invention the paper pulp while mixing is being mixed can be a very even one Warming up can be achieved.

Erfolgt die Aufheizung des Papierfaserstoffs durch Dampf und ist gleichzeitig am Förderaggregat ein Vakuum angelegt, so kann der Dampf gezielt geführt und der Wärmeübergang zum Papierfaserstoff optimiert werden.The pulp is heated by steam and is at the same time A vacuum is applied to the conveyor unit so that the steam can be targeted and the heat transfer to the paper pulp can be optimized.

Weiters ist es vorteilhaft, wenn der abgekühlte Überschussdampf nach Durchströmung der Papierstoffsuspension abgeleitet wird.It is also advantageous if the cooled excess steam after Flow of the pulp suspension is derived.

Bei vielen Anwendungen kann es vorteilhaft sein, wenn zusätzlich Chemikalien in den Papierfaserstoff eingemischt werden. Durch die gleichzeitige Aufheizung und Zuführung von Chemikalien kann eine gleichmäßige Reaktion erreicht werden.In many applications, it can be beneficial if additional Chemicals are mixed into the paper pulp. Through the simultaneous heating and supply of chemicals can be a uniform response can be achieved.

Weiters betrifft die Erfindung eine Vorrichtung zur Dispergierung eines Papierfaserstoffes, mit einer Zufuhreinrichtung für Dampf, einem Förderaggregat und einem Disperger. Sie ist dadurch gekennzeichnet, dass das Förderaggregat mindestens einen Einlass (Stutzen bzw. Einlassöffnungen) für Dampf aufweist. Damit kann kurz vor dem Disperger der Papierfaserstoff aufgeheizt werden und ein zusätzliches Heizaggregat entfallen.The invention further relates to a device for dispersing a Paper pulp, with a feed device for steam, a conveyor unit and a disperger. It is characterized by the fact that Conveyor unit at least one inlet (nozzle or inlet openings) for steam. This means that just before the disperger Paper pulp can be heated and an additional heating unit omitted.

Wenn erfindungsgemäß das Förderaggregat als Mischschnecke ausgebildet ist, kann eine gleichmäßige Durchmischung mit Dampf und damit eine gleichmäßige Aufwärmung erreicht werden.If, according to the invention, the delivery unit is designed as a mixing screw is an even mixing with steam and thus a uniform warm-up can be achieved.

Wird gemäß einem weiteren Merkmal der Erfindung mindestens ein Stutzen als Vakuumanschluss ausgebildet, so kann eine gezielte Dampfführung und eine optimaler Wärmeübertragung erzielt werden.According to a further feature of the invention, at least one Spigot designed as a vacuum connection, so a targeted steam flow and optimal heat transfer can be achieved.

Werden die Stutzen am Gehäuse des Förderaggregates, beispielsweise Mischschnecke, angeordnet, so kann eine gute Aufwärmung erzielt werden.Are the sockets on the housing of the conveyor, for example Mixing screw, arranged, so a good warm-up can be achieved become.

Eine besonders vorteilhafte Weiterbildung der Erfindung ist dadurch gekennzeichnet, dass das Förderaggregat, beispielsweise Mischschnecke eine Hohlwelle aufweist, wobei die Hohlwelle Dorne zur Einmischung aufweisen können. Damit kann der Dampf gezielt entlang des Förderweges zugeführt werden, was zu einer gleichmäßigeren Verteilung und somit Aufwärmung führt.This is a particularly advantageous development of the invention characterized in that the conveyor unit, for example mixing screw has a hollow shaft, the hollow shaft having spikes for interference can. This allows the steam to be directed along the conveyor path are fed, resulting in a more even distribution and thus Warming up leads.

Sind die Einlassöffnungen der Dorne auf unterschiedlichen Radien des Förderaggregats, beispielsweise Mischschnecke, vorgesehen, so ist die Einbringung von Dampf bzw. Chemikalien auch über den Querschnitt der Förderschnecke gleichmäßig möglich.Are the inlet openings of the mandrels on different radii of the Conveyor unit, for example a mixing screw, is provided, that is Introduction of steam or chemicals also across the cross section of the Screw conveyor evenly possible.

Die Erfindung wird nun anhand der Zeichnungen beispielhaft beschrieben, wobei Fig. 1 eine Anlage nach dem Stand der Technik, Fig. 2 eine Draufsicht auf eine erfindungsgemäße Vorrichtung, Fig. 3 eine Ansicht von Fig. 2 gemäß Pfeil III, Fig. 4 einen Schnitt durch eine erfindungsgemäße Vorrichtung, Fig. 5 eine schematische Darstellung einer Variante der Erfindung, Fig. 6 eine spezielle Ausgestaltung der Erfindung und Fig. 7 einen Schnitt durch Fig. 4 mit einer weiteren Variante der Erfindung darstellt.The invention will now be described by way of example with reference to the drawings, Fig. 1 is a system according to the prior art, Fig. 2 is a plan view on a device according to the invention, Fig. 3 is a view of Fig. 2 according to arrow III, Fig. 4 shows a section through an inventive 5, a schematic representation of a variant of the Invention, FIG. 6 shows a special embodiment of the invention and FIG. 7 shows a section through Fig. 4 with a further variant of the invention.

In Fig. 1 ist eine Anlage nach dem Stand der Technik dargestellt, bei der eine Schneckenpresse 1 zur Entwässerung der Papierfasersuspension vorgesehen ist. Die entwässerte Suspension wird dann mit einer Konsistenz von ca. 20 - 35 %, vorteilhaft 25 -30 %, über einen Schacht 2 einer Heizeinrichtung 3 mit rotierenden Schaufeln zugeführt. Anschließend fällt die aufgeheizte Suspension in eine Schnecke 4 zur Zuführung zum Disperger 5. Der Dampf wird der Heizeinrichtung 3 durch eine Dampfleitung 6 zugeleitet, wobei auch ein Teil bereits in den Schacht 2 eingeführt werden kann. Die zu behandelnde Suspension wird über einen Einlassstutzen 7 der Schneckenpresse 1 zugeführt und tritt als Pfropfen 8 am Ende aus. Der Pfropfen 8 am Ende der Schneckenpresse 1 dient hier als Dampfsperre.In Fig. 1 a system according to the prior art is shown in which a screw press 1 for dewatering the paper fiber suspension is provided. The dehydrated suspension is then with a Consistency of approx. 20 - 35%, advantageously 25 - 30%, via a shaft 2 a heater 3 supplied with rotating blades. Subsequently the heated suspension falls into a screw 4 for feeding Disperger 5. The steam is the heater 3 through a steam line 6 supplied, with a part already inserted in the shaft 2 can be. The suspension to be treated is over a Inlet 7 of the screw press 1 is fed and occurs as a plug 8 in the end. The plug 8 at the end of the screw press 1 is used here as a vapor barrier.

Fig. 2 zeigt eine Draufsicht auf eine erfindungsgemäße Vorrichtung. Hier wird ebenfalls die zu behandelnde Papierstoffsuspension in einer Schneckenpresse 1 entwässert und über einen Schacht 2 einer Stopfschnecke 8' bzw. in weiterer Folge einem Förderaggregat 9, das als Zuführschnecke ausgeführt sein kann, einem Disperger 5 zugeführt. 2 shows a top view of a device according to the invention. Here is also the pulp suspension to be treated in a Screw press 1 dewatered and via a shaft 2 of a stuffing screw 8 'or subsequently a conveyor unit 9, which as Feed screw can be performed, supplied to a disperser 5.

Weiters sind hier Leitungen 10, 10' erkennbar, über die der Papierstoffsuspension Dampf bzw. Chemikalien zugeführt werden können. Als Chemikalien kommen sowohl flüssige oder gasförmige Bleich- als auch Hygienechemikalien wie z.B. Peroxid, Natronlauge, Chlor, Ozon oder Dispergiermittel in Frage.Lines 10, 10 'can also be seen here, via which the pulp suspension Steam or chemicals can be added. As Chemicals come in both liquid or gaseous bleach as well Hygiene chemicals such as Peroxide, caustic soda, chlorine, ozone or Dispersant in question.

Fig. 3 zeigt eine Ansicht von Fig. 2 gemäß Pfeil III. Die Schneckenpresse 1 ist über einen Schacht 2 mit der Stopfschnecke 8' verbunden. Die Papierstoffsuspension wird weiters dem Förderaggregat 9, insbesondere Zuführschnecke zugeleitet, wobei die Stopfschnecke 8' auch als Dampfsperre für den durch Leitung 10 zugeführten Dampf dient. Hinter der Zuführschnecke ist dann der Disperger 5 angeordnet.Fig. 3 shows a view of Fig. 2 according to arrow III. The screw press 1 is connected to the stuffing screw 8 'via a shaft 2. The pulp suspension is further conveyed to the conveyor unit 9, In particular, feed screw is fed, the stuffing screw 8 ' also serves as a vapor barrier for the steam supplied through line 10. The disperser 5 is then arranged behind the feed screw.

In Fig. 4 ist ein Schnitt durch eine Vorrichtung gemäß der Erfindung dargestellt. Man erkennt die Einmündung der Stopfschnecke 8' und einen Zuführteil des Förderaggregats 9. Zur Dampfzufuhr können Stutzen 11 am Mantel 12 am Beginn des Förderaggregats oder Stutzen 11' oder 11" im Endteil des Förderaggregats angebracht sein. Durch diese Stutzen können auch alternativ Chemikalien zugeführt werden. Wird das Förderaggregat, insbesondere Schnecke, mit einer Hohlwelle 13 ausgestaltet, so kann auch Dampf bzw. Chemikalien in Richtung 14 durch die Hohlwelle 13 eingebracht werden. Besonders vorteilhaft ist es, wenn zwischen den Schneckenwendeln 15 Dorne 16 vorgesehen sind. Auf diese Weise kann der Dampf auch einfach über den Querschnitt der Schnecke gleichmäßig verteilt eingebracht werden.4 shows a section through a device according to the invention. One recognizes the mouth of the stuffing screw 8 'and one Feed part of the conveying unit 9. Stubs 11 on the jacket 12 at the beginning of the conveyor unit or nozzle 11 'or 11 " be attached in the end part of the conveyor unit. Through these socks Alternatively, chemicals can also be added. If the conveyor unit, in particular worm, designed with a hollow shaft 13, so can also steam or chemicals in direction 14 through the hollow shaft 13th be introduced. It is particularly advantageous if between the Screw coils 15 mandrels 16 are provided. That way the steam also simply spread evenly across the cross section of the screw distributed.

Wird der Dampf über die Stutzen 11, 11' oder 11" eingebracht, kann auch an die Hohlwelle 13 ein Vakuum (entgegen Richtung 14) angelegt werden. Alternativ kann durch die Hohlwelle 13 Dampf eingebracht und vorteilhafterweise durch Stutzen 11 abgesaugt werden. In diesem Fall können durch die Stutzen 11' bzw. 11" Chemikalien zugegeben werden. Anschließend wird die Suspension dem Disperger 5 gut durchwärmt und durchmischt zugeführt. If the steam is introduced via the nozzle 11, 11 'or 11 ", it can also a vacuum (against direction 14) is applied to the hollow shaft 13. Alternatively, steam can be introduced through the hollow shaft 13 and advantageously can be sucked off by nozzle 11. In this case, you can chemicals are added through the nozzle 11 'or 11 ". The suspension is then thoroughly warmed up and the disperser 5 mixed mixed.

Fig. 5 zeigt schematisch den Aufbau der erfindungsgemäßen Vorrichtung, wobei Dampf in Richtung 14 durch die Hohlwelle 13 zugeführt wird. Über die Länge der Welle tritt der Dampf an verschiedenen Stellen gleichmäßig aus. Die Papierstoffsuspension hat hier eine Temperatur von ca. 20 bis zu 80 °C, meist 40 - 60 °C. Der überschüssige Dampf wird dann durch die Stutzen 11, 11' bzw. 11" abgesaugt. Die Stutzen 11, 11', 11" können auch als am Schneckenmantel 12 angebrachte, ganz oder teilweise um den Umfang reichende, Kanäle ausgeführt sein. Vor dem Eintritt in die Dispergierzone weist die Papierstoffsuspension dann eine Temperatur größer 85 °C auf.5 schematically shows the structure of the device according to the invention, steam is supplied in the direction 14 through the hollow shaft 13. about the length of the wave, the steam enters evenly at different points out. The pulp suspension has a temperature of about 20 to 80 ° C, usually 40 - 60 ° C. The excess steam is then through the Sockets 11, 11 'and 11 "are suctioned off. Sockets 11, 11', 11" can also as attached to the screw shell 12, all or part of the Extending channels can be executed. Before entering the The pulp suspension then has a temperature in the dispersion zone greater than 85 ° C.

Fig. 6 zeigt eine Möglichkeit der Dampfzufuhr. Die auf der Hohlwelle 13 angebrachte Schneckenwendel 15 wird durch eine Wand 18 gestützt, so dass sich ein Hohlraum 19 bildet. Aus der Hohlwelle 13 tritt der Dampf durch Öffnungen 20 in den Hohlraum 19 und wird dann durch Einlassöffnungen 21, 21' in die Papierstoffsuspension geführt. Je nach Lage der Einlassöffnungen 21, 21' kann dies auch an verschiedenen Stellen des Querschnittes des Förderaggregats 9, insbesondere Zuführschnecke, erfolgen.Fig. 6 shows one way of supplying steam. The on the hollow shaft 13th attached helix 15 is supported by a wall 18, so that a cavity 19 is formed. The steam emerges from the hollow shaft 13 through openings 20 into the cavity 19 and is then through inlet openings 21, 21 'led into the pulp suspension. Depending on the location of the Inlet openings 21, 21 'can also do this at different points in the Cross section of the conveyor unit 9, in particular feed screw, respectively.

Fig. 7 entspricht einem Schnitt entlang Linie VII-VII in Fig. 4. Die innerhalb des Schneckenmantels 12 laufende Hohlwelle 13 weist mehrere Dorne 16 auf, die unterschiedliche Längen haben können. Zur Dampfzufuhr in die Suspension sind die Dorne 16 mit Einlassöffnungen 21, 21' versehen, die eine Verteilung über den Querschnitt des Förderaggregats 9 gewährleisten. Auch können die Dorne 16 an ihrem oberen (von der Welle entfernten) Ende offen sein.Fig. 7 corresponds to a section along line VII-VII in Fig. 4. The inside of the screw shell 12 running hollow shaft 13 has a plurality of mandrels 16 that can have different lengths. For steam supply in the The mandrels 16 are provided with inlet openings 21, 21 'in suspension ensure a distribution over the cross section of the conveyor unit 9. The mandrels 16 can also be on their upper (away from the shaft) Be open at the end.

Claims (13)

Verfahren zur Dispergierung eines Papierfaserstoffes, bei dem ein vorentwässerter Stoff aufgeheizt, gefördert und in einem Disperger dispergiert wird, dadurch gekennzeichnet, dass der Papierfaserstoff unmittelbar vor Eintritt in die Dispergierzone aufgeheizt wird.A process for dispersing a paper pulp, in which a pre-dewatered substance is heated, conveyed and dispersed in a disperser, characterized in that the paper pulp is heated up immediately before entering the dispersion zone. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Papierfaserstoff während der Aufheizung durchmischt wird.A method according to claim 1, characterized in that the paper pulp is mixed during the heating. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Aufheizung des Papierfaserstoffs durch Dampf erfolgt.A method according to claim 1 or 2, characterized in that the pulp is heated by steam. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass gleichzeitig am Förderaggregat ein Vakuum angelegt ist.Method according to one of claims 1 to 3, characterized in that a vacuum is simultaneously applied to the conveyor unit. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der abgekühlte Überschussdampf nach Durchströmung der Papierstoffsuspension abgeleitet wird.Method according to one of claims 1 to 4, characterized in that the cooled excess steam is discharged after flowing through the pulp suspension. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass während der Aufheizung zusätzlich Chemikalien in den Papierfaserstoff eingemischt werden.Method according to one of claims 1 to 5, characterized in that additional chemicals are mixed into the paper pulp during the heating. Vorrichtung zur Dispergierung eines Papierfaserstoffes, mit einer Zufuhreinrichtung für Dampf, einem Förderaggregat und einem Disperger, dadurch gekennzeichnet, dass das Förderaggregat (9) mindestens einen Einlass (Stutzen 11, 11', 11" bzw. Einlassöffnungen 21, 21') für Dampf aufweist.Device for dispersing a paper pulp, with a feed device for steam, a delivery unit and a disperser, characterized in that the delivery unit (9) has at least one inlet (connecting piece 11, 11 ', 11 "or inlet openings 21, 21') for steam , Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass das Förderaggregat (9) als Mischschnecke ausgebildet ist.Apparatus according to claim 7, characterized in that the conveyor unit (9) is designed as a mixing screw. Vorrichtung nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass mindestens ein Stutzen (11, 11', 11") als Vakuumanschluss ausgebildet ist. Apparatus according to claim 7 or 8, characterized in that at least one nozzle (11, 11 ', 11 ") is designed as a vacuum connection. Vorrichtung nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, dass die Stutzen (11, 11', 11") am Gehäuse (12) des Förderaggregates (9), beispielsweise Mischschnecke, angeordnet sind.Device according to one of claims 7 to 9, characterized in that the connecting pieces (11, 11 ', 11 ") are arranged on the housing (12) of the conveying unit (9), for example a mixing screw. Vorrichtung nach einem der Ansprüche 7 bis 10, dadurch gekennzeichnet, dass das Förderaggregat (9), beispielsweise Mischschnecke, eine Hohlwelle (13) aufweist.Device according to one of claims 7 to 10, characterized in that the conveying unit (9), for example a mixing screw, has a hollow shaft (13). Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass die Hohlwelle (13) Dorne (16) zur Einmischung aufweist.Apparatus according to claim 11, characterized in that the hollow shaft (13) has mandrels (16) for mixing. Vorrichtung nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass die Einlassöffnungen (21, 21') auf unterschiedlichen Radien des Förderaggregats (9), beispielsweise Mischschnecke, vorgesehen sind.Device according to claim 11 or 12, characterized in that the inlet openings (21, 21 ') are provided on different radii of the conveying unit (9), for example a mixing screw.
EP03005093A 2002-03-27 2003-03-07 Process and apparatus for dispersing a paper fibre slurry Expired - Lifetime EP1348802B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT03005093T ATE408041T1 (en) 2002-03-27 2003-03-07 METHOD AND DEVICE FOR DISPERSING A PAPER FIBER MATERIAL

Applications Claiming Priority (2)

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AT0048002A AT411604B (en) 2002-03-27 2002-03-27 METHOD AND DEVICE FOR DISPERSING A PAPER FIBER FIBER
AT4802002 2002-03-27

Publications (2)

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EP1348802A1 true EP1348802A1 (en) 2003-10-01
EP1348802B1 EP1348802B1 (en) 2008-09-10

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US (1) US20060108083A1 (en)
EP (1) EP1348802B1 (en)
CN (1) CN1306113C (en)
AT (2) AT411604B (en)
CA (1) CA2421407A1 (en)
DE (1) DE50310459D1 (en)
MX (1) MXPA03002619A (en)
NO (1) NO330431B1 (en)

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AT507837B1 (en) * 2008-12-29 2010-10-15 Andritz Ag Maschf METHOD AND DEVICE FOR DRAINING AND DISPERSING A FIBROUS MATERIAL
CN106381738A (en) * 2016-09-28 2017-02-08 广西大学 Waste paper aluminum plastic packing box fast separation method
CN109173963A (en) * 2018-09-30 2019-01-11 山东世纪阳光纸业集团有限公司 A kind of biological respinse transverse tube
SE542682C2 (en) * 2018-10-31 2020-06-23 Valmet Oy A discharge screw arrangement for discharging lignocellulosic material from a lignocellulosic treatment reactor
SE543105C2 (en) * 2019-04-08 2020-10-06 Valmet Oy Reactor assembly and method for treatment of biomass material

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Also Published As

Publication number Publication date
DE50310459D1 (en) 2008-10-23
EP1348802B1 (en) 2008-09-10
AT411604B (en) 2004-03-25
NO330431B1 (en) 2011-04-11
CN1446976A (en) 2003-10-08
MXPA03002619A (en) 2004-02-12
NO20031223L (en) 2003-09-29
CA2421407A1 (en) 2003-09-27
ATE408041T1 (en) 2008-09-15
US20060108083A1 (en) 2006-05-25
ATA4802002A (en) 2003-08-15
NO20031223D0 (en) 2003-03-17
CN1306113C (en) 2007-03-21

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