EP1355003A2 - Drying section - Google Patents

Drying section Download PDF

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Publication number
EP1355003A2
EP1355003A2 EP03100377A EP03100377A EP1355003A2 EP 1355003 A2 EP1355003 A2 EP 1355003A2 EP 03100377 A EP03100377 A EP 03100377A EP 03100377 A EP03100377 A EP 03100377A EP 1355003 A2 EP1355003 A2 EP 1355003A2
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EP
European Patent Office
Prior art keywords
drying
dryer
web
group
row
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
EP03100377A
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German (de)
French (fr)
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EP1355003B1 (en
EP1355003A3 (en
Inventor
Bernhard Schleidt
Erich Rollenitz
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Voith Patent GmbH
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Voith Paper Patent GmbH
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Publication of EP1355003A2 publication Critical patent/EP1355003A2/en
Publication of EP1355003A3 publication Critical patent/EP1355003A3/en
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Publication of EP1355003B1 publication Critical patent/EP1355003B1/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders

Definitions

  • the invention relates to a dryer section for drying a running Material web, in particular paper or cardboard web, with several in Direction of web travel successive dryer groups.
  • Dryer sections of this type are described, for example, in US publications 5,539,999, WO 98/48106 and US 5,673,495.
  • the aim of the invention is to provide an improved dryer section at the beginning to create the kind mentioned.
  • the design of the Group separation in the dryer section can be further optimized.
  • this object is achieved by a dryer section for Drying a running material web, in particular paper or cardboard web, with several successive drying groups in the direction of web travel, at least one of which is in two rows, the material web at least in a respective transition area from a single row Drying group to a immediately following two-row Dry group and / or in a respective transition area between two successive two-tier dryer groups is supported continuously.
  • This training results in an optimized concept geometry for the dryer section, which includes a roller saving and cylinder saving including scrapers. Moreover, due to This optimized concept reduces the overall length of the dryer section become. The result is an improved rejection of rejects with rope-less Threading concept.
  • the concept according to the invention is also also the installation of additional devices such as of nozzle devices and / or the like.
  • the solution according to the invention for example, the installation of web guards. The result is an optimal design of the Separation of groups in the dryer section and in particular one Optimization of a respective transition from a single row to one two-tier or between two two-tier dryer groups. In contrast the fibrous web between the usual dryer sections always support the drying groups.
  • the material web becomes a dryer section in a respective transition area by one of the following two-tier dryer groups Dryer screen directly from the drying cylinder of the previous one Dry group taken over.
  • the material web is preferred from an upper dryer fabric of the following two-row dryer group accepted.
  • the previous drying group can especially a single-row or double-row dryer group act.
  • the material web in each case provided between two drying groups each is supported continuously.
  • the material or fiber web can additionally for example in a respective transition area supported continuously between two single-tier dryer groups his.
  • a suction box is provided in a respective transition area is.
  • the material web is preferably in a respective transition region guided around a suction roller, which is, for example, a Suction felt guide roller and / or dryer fabric suction roller can act. there the material web can in particular together with the upper dryer fabric the following two-row dryer group around the suction roller be led.
  • the vacuum in the suction roll is generated via the suction box. This does not apply the expensive cable entry through the bearing of the suction roll.
  • the roll shell of the suction roll should distribute the suction grooved and / or drilled on the wrapped surface his.
  • suction box over the inside of the suction roller to connect with a vacuum source.
  • the combination of one is particularly advantageous downward web decrease from the drying cylinder of the previous one Dryer group through the dryer fabric of the following dryer group, a suction roller in the area of the lower bypass of the dryer fabric and a suction box to stabilize the web guide between the drying cylinders and the suction roller.
  • Transfer edge zones in the suction roll and the are particularly advantageous Suction box in the area in which the transfer ribbon or strip during the transfer process.
  • the transfer zones can e.g. on the driver's side Edge of the machine may be provided.
  • the transfer zones can vacuum is applied regardless of the remaining zones.
  • Fig. 1 shows a schematic representation of a transition area I from a single-tier dryer group 10 to an immediately following one double-row dryer group 12 of a dryer section 14 for drying a running material or fiber web, which is particularly can be a paper or cardboard web.
  • the dryer section 14 can in particular be part of a paper machine.
  • the dryer section 14 thus comprises several in the web or machine running direction L successive drying groups 10, 12, of which in the present case is at least a double row.
  • the material web 16 is in the Transition area I from the single-tier dryer group 10 to the next one double-row dryer group 12 supported continuously.
  • the material web 16 is in this transition region I by the following two-tier dryer group 12 assigned upper Dryer screen 18 directly from the last drying cylinder 20 of the previous one single-row dryer group 10.
  • In support of Web transfer into transition area I is preferably a suction box 22 provided.
  • the material web 16 is in this transition area I together with the upper dryer fabric 18 of the following two-row dryer group 12 preferably around a suction roller 24 managed, e.g. around a suction felt guide roller and / or dryer fabric suction roller can act.
  • the material web 16 is in the single row dryer group 10 alternately via drying cylinders 20 and Web guide rollers 26 out.
  • the material web 16 is in the two-row dryer group 12 alternately via drying cylinder 28 a lower cylinder bank and drying cylinder 30 an upper cylinder bank guided.
  • a lower dryer fabric 32 for the lower row of cylinders of the double row Dryer group 12 is provided.
  • Figure 2 shows a schematic representation of a transition area II between two consecutive two-tier dryer groups 12 of the dryer section 14.
  • the material web 16 is in the transition region I continuously supported again.
  • the material web 16 in this transition area II by that of the following two-row Upper dryer fabric 18 assigned to drying group 12 directly from the last one Drying cylinder 30 of the preceding two-row dryer group 12 accepted.
  • a suction box 22 is provided to support the railway takeover in transition area II again preferably a suction box 22 is provided. Moreover, the Material web 16 together with the upper dryer fabric 18 of the following two-tier dryer group 12 preferably again by one Suction roll 24, e.g. Suction felt guide roller and / or dryer fabric suction roller, guided.
  • Suction roll 24 e.g. Suction felt guide roller and / or dryer fabric suction roller
  • the material web 16 is in the two double-row dryer groups 12 alternately via drying cylinder 28 of a lower row of cylinders and drying cylinder 30 guided an upper row of cylinders.
  • each of the two two-tier dryer groups 12 is the top row of cylinders again an upper dryer wire 18 and the lower row of cylinders a lower one Dryer screen 32 assigned.
  • the web or machine direction is in this Fig. 2 again indicated by an arrow "L".
  • the material web 16 can expediently in all between two drying groups 10, 12 provided transition areas be supported continuously. For example, between single-row dryer groups the material web 16 continuously be supported. In this case too, you can choose between the relevant Groups in particular a suction box and / or one Suction felt guide roller can be provided.
  • FIG. 3 shows the transition area again in a more detailed representation II between two double-tier dryer groups 12 (see also Fig. 2).
  • the suction box 22 provided for the web takeover.
  • the material web 16 can together with the upper dryer fabric 18 subsequent drying group 12 in particular also by one Suction roller 24 can be guided, which is e.g. again a suction felt guide roller and / or a dryer fabric suction roller can act.
  • transition area II corresponds at least essentially again the transition area II shown in FIG. 2.
  • Corresponding parts are assigned the same reference numerals.
  • such a suction box 22 and / or one such suction roller 24 in particular in a respective transition area I from a single-tier dryer group 10 to an immediately following one two-row dryer group 12 may be provided (see FIG. 1) and / or e.g. in a respective transition area between two zones Drying groups can be provided.
  • the vacuum in the respective suction roller 24 can in particular be via the Suction box 22 are generated.
  • a suction roller 24 in the area of the lower diversion of the dryer fabric 18 and a suction box 22 for stabilizing the Web guidance between the drying cylinders 20, 30; 30 and the suction roller 24 are provided.

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  • Paper (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

In a paper manufacturing process a wet web of paper or carton (16) passes (L) through a drying section (14) with a number of drying groups (10, 12) of which one is arranged in two rows. The web passes from a single-row drying group (10) through a transition zone (I) to a twin-row drying group (12). In an alternative embodiment the wet web passes from a single-row drying group through a transition zone (II) to two immediately sequential twin-row drying groups (12). Web material (16) in a transition zone (I, II) passes through a drying sieve (18) in the next twin-row drying group (12, 30) directly from the last drying cylinder (20) in the preceding drying group (10, 20). Web material (16) in the upper drying sieve (18) is passed to the subsequent twin-row drying group (12). In each case, web material is supported by a suction box (22) as it passes through a transition zone between two drying groups (10, 12)

Description

Die Erfindung betrifft eine Trockenpartie zum Trocknen einer laufenden Materialbahn, insbesondere Papier- oder Kartonbahn, mit mehreren in Bahnlaufrichtung aufeinanderfolgenden Trockengruppen.The invention relates to a dryer section for drying a running Material web, in particular paper or cardboard web, with several in Direction of web travel successive dryer groups.

Trockenpartien dieser Art sind beispielsweise in den Druckschriften US 5,539,999, WO 98/48106 und US 5,673,495 beschrieben.Dryer sections of this type are described, for example, in US publications 5,539,999, WO 98/48106 and US 5,673,495.

Ziel der Erfindung ist es, eine verbesserte Trockenpartie der eingangs genannten Art zu schaffen. Dabei soll insbesondere die Gestaltung der Gruppentrennung in der Trockenpartie weiter optimiert werden.The aim of the invention is to provide an improved dryer section at the beginning to create the kind mentioned. The design of the Group separation in the dryer section can be further optimized.

Erfindungsgemäß wird diese Aufgabe gelöst durch eine Trockenpartie zum Trocknen einer laufenden Materialbahn, insbesondere Papier- oder Kartonbahn, mit mehreren in Bahnlaufrichtung aufeinander folgenden Trockengruppen, von denen zumindest eine zweireihig ist, wobei die Materialbahn zumindest in einem jeweiligen Übergangsbereich von einer einreihigen Trockengruppe zu einer unmittelbar darauf folgenden zweireihigen Trockengruppe und/oder in einem jeweiligen Übergangsbereich zwischen zwei unmittelbar aufeinander folgenden zweireihigen Trockengruppen jeweils durchgehend abgestützt ist.According to the invention this object is achieved by a dryer section for Drying a running material web, in particular paper or cardboard web, with several successive drying groups in the direction of web travel, at least one of which is in two rows, the material web at least in a respective transition area from a single row Drying group to a immediately following two-row Dry group and / or in a respective transition area between two successive two-tier dryer groups is supported continuously.

Aufgrund dieser Ausbildung ergibt sich eine optimierte Konzeptgeometrie für die Trockenpartie, die u.a. eine Walzeneinsparung sowie Zylindereinsparung einschließlich Schaber mit sich bringt. Überdies kann aufgrund dieses optimierten Konzeptes die Gesamtlänge der Trockenpartie reduziert werden. Es ergibt sich eine verbesserte Ausschussabführung bei seillosem Überführkonzept. Mit der erfindungsgemäßen Konzeption wird überdies auch der Einbau von Zusatzeinrichtungen wie z.B. von Düsenvorrichtungen und/oder dergleichen ermöglicht. Darüber hinaus ermöglicht die erfindungsgemäße Lösung zum Beispiel den Einbau von Bahnabschlagvorrichtungen. Im Ergebnis ergibt sich eine optimale Gestaltung der Gruppentrennung in der Trockenpartie und dabei insbesondere eine Optimierung eines jeweiligen Übergangs von einer einreihigen zu einer zweireihigen bzw. zwischen zwei zweireihigen Trockengruppen. Im Gegensatz zu den bisher üblichen Trockenpartien wird die Faserstoffbahn zwischen den Trockengruppen immer abgestützt.This training results in an optimized concept geometry for the dryer section, which includes a roller saving and cylinder saving including scrapers. Moreover, due to This optimized concept reduces the overall length of the dryer section become. The result is an improved rejection of rejects with rope-less Threading concept. With the concept according to the invention is also also the installation of additional devices such as of nozzle devices and / or the like. In addition, the solution according to the invention, for example, the installation of web guards. The result is an optimal design of the Separation of groups in the dryer section and in particular one Optimization of a respective transition from a single row to one two-tier or between two two-tier dryer groups. In contrast the fibrous web between the usual dryer sections always support the drying groups.

Bei einer bevorzugten praktischen Ausführungsform der erfindungsgemäßen Trockenpartie wird die Materialbahn in einem jeweiligen Übergangsbereich durch ein der nachfolgenden zweireihigen Trockengruppe zugeordnetes Trockensieb direkt vom Trockenzylinder der vorangehenden Trockengruppe übernommen. Dabei wird die Materialbahn vorzugsweise von einem oberen Trockensieb der nachfolgenden zweireihigen Trockengruppe übernommen. Bei der vorangehenden Trockengruppe kann es sich insbesondere wiederum um eine einreihige oder zweireihige Trockengruppe handeln.In a preferred practical embodiment of the invention The material web becomes a dryer section in a respective transition area by one of the following two-tier dryer groups Dryer screen directly from the drying cylinder of the previous one Dry group taken over. The material web is preferred from an upper dryer fabric of the following two-row dryer group accepted. The previous drying group can especially a single-row or double-row dryer group act.

Es ist beispielsweise möglich, dass die Materialbahn in sämtlichen jeweils zwischen zwei Trockengruppen vorgesehenen Übergangsbereichen jeweils durchgehend abgestützt ist. Die Material- oder Faserstoffbahn kann zusätzlich also beispielsweise auch in einem jeweiligen Übergangsbereich zwischen zwei einreihigen Trockengruppen jeweils durchgehend abgestützt sein. It is possible, for example, that the material web in each case provided between two drying groups each is supported continuously. The material or fiber web can additionally for example in a respective transition area supported continuously between two single-tier dryer groups his.

Von Vorteil ist insbesondere auch, wenn zur Unterstützung der Bahnübernahme in einem jeweiligen Übergangsbereich ein Saugkasten vorgesehen ist. Bevorzugt ist die Materialbahn in einem jeweiligen Übergangsbereich um eine Saugwalze geführt, bei der es sich beispielsweise um eine Saugfilzleitwalze und/oder Trockensiebsaugwalze handeln kann. Dabei kann die Materialbahn insbesondere zusammen mit dem oberen Trockensieb der nachfolgenden zweireihigen Trockengruppe um die Saugwalze geführt sein. Von Vorteil ist hierbei u.a. die höhere Betriebssicherheit beim Einführen der Faserstoffbahn, da diese nach der Übernahme durch das betreffende Trockensieb bei eventuell auftretenden Problemen einfach in den Keller geführt werden kann.It is also particularly advantageous if it supports the railway takeover a suction box is provided in a respective transition area is. The material web is preferably in a respective transition region guided around a suction roller, which is, for example, a Suction felt guide roller and / or dryer fabric suction roller can act. there the material web can in particular together with the upper dryer fabric the following two-row dryer group around the suction roller be led. One of the advantages is the higher operational safety when inserting the fibrous web, since this after the takeover by the dryer in question if problems arise can be led into the basement.

Dies ist insbesondere bei hohen Geschwindigkeiten von Bedeutung. Der Überführstreifen kann sich vom Trockensieb lösen. Dabei fliegen die Papierfetzen bei dieser abwärts gerichteten Übernahme des Überführstreifens vom vorhergehenden Trockenzylinder in den Maschinenkeller, wo sie den Produktionsprozess nicht mehr stören. Die Papierfetzen können nicht in den über den Trockenzylindern liegenden Raum (Trockenfilz- bzw. Trockensiebführung) gelangen und so den Produktionsprozess stören.This is particularly important at high speeds. The Transfer strips can detach from the dryer fabric. The scraps of paper fly with this downward takeover of the transfer strip from the previous drying cylinder to the machine cellar, where they no longer disrupt the production process. The scraps of paper cannot in the room above the drying cylinders (dry felt or Dryer fabric guide) and thus disrupt the production process.

Grundsätzlich können ein jeweiliger Saugkasten und/oder eine jeweilige Saugwalze in einen Übergangsbereich zwischen beliebigen Trockengruppen, also beispielsweise auch zwischen einreihigen Trockengruppen, vorgesehen sein.Basically, a respective suction box and / or a respective one Suction roller in a transition area between any drying groups, for example between single-tier dryer groups, be provided.

Bei einer besonders kostengünstigen und bevorzugten Ausführung wird das Vakuum in der Saugwalze über den Saugkasten erzeugt. Dabei entfällt die teure Leitungsdurchführung durch das Lager der Saugwalze. In a particularly inexpensive and preferred embodiment the vacuum in the suction roll is generated via the suction box. This does not apply the expensive cable entry through the bearing of the suction roll.

Der Walzenmantel der Saugwalze sollte zur Verteilung der Saugwirkung auf die umschlungene Mantelfläche gerillt und/oder gebohrt ausgeführt sein.The roll shell of the suction roll should distribute the suction grooved and / or drilled on the wrapped surface his.

Es ist so auch möglich, den Saugkasten über das Innere der Saugwalze mit einer Unterdruckquelle zu verbinden.It is also possible to place the suction box over the inside of the suction roller to connect with a vacuum source.

Von besonderem Vorteil ist insbesondere auch die Kombination einer abwärts gerichteten Bahnabnahme vom Trockenzylinder der vorangehenden Trockengruppe durch das Trockensieb der nachfolgenden Trockengruppe, einer Saugwalze im Bereich der unteren Umleitung des Trockensiebes und eines Saugkastens zur Stabilisierung der Bahnführung zwischen den Trockenzylindern und der Saugwalze.The combination of one is particularly advantageous downward web decrease from the drying cylinder of the previous one Dryer group through the dryer fabric of the following dryer group, a suction roller in the area of the lower bypass of the dryer fabric and a suction box to stabilize the web guide between the drying cylinders and the suction roller.

Besonders vorteilhaft sind Überführrandzonen in der Saugwalze und dem Saugkasten in dem Bereich, in dem der Überführbändel oder -streifen beim Überführvorgang läuft. Die Überführzonen können z.B. am führerseitigen Rand der Maschine vorgesehen sein. Die Überführzonen können unabhängig von den restlichen Zonen mit Vakuum beaufschlagt werden.Transfer edge zones in the suction roll and the are particularly advantageous Suction box in the area in which the transfer ribbon or strip during the transfer process. The transfer zones can e.g. on the driver's side Edge of the machine may be provided. The transfer zones can vacuum is applied regardless of the remaining zones.

Auf diese Weise wird das Überführen ohne Seilführung ermöglicht, was den Überführvorgang einfacher und sicherer gestaltet.In this way, the transfer without rope guidance is possible, what made the transfer process easier and safer.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnung näher erläutert; in dieser zeigen:

Fig. 1
eine schematische Darstellung eines Übergangsbereichs von einer einreihigen Trockengruppe zu einer darauffolgenden zweireihigen Trockengruppe einer Trockenpartie,
Fig. 2
eine schematische Darstellung eines Übergangsbereichs zwischen zwei zweireihigen Trockengruppen der Trockenpartie, und
Fig. 3
eine detailliertere Darstellung eines Übergangsbereichs zwischen beispielsweise zwei zweireihigen Trockengruppen, in dem zur Unterstützung der Bahnübernahme ein Saugkasten vorgesehen ist.
The invention is explained below using exemplary embodiments with reference to the drawing; in this show:
Fig. 1
1 shows a schematic representation of a transition area from a single-tier dryer group to a subsequent two-tier dryer group of a dryer section,
Fig. 2
is a schematic representation of a transition region between two double-tier dryer groups of the dryer section, and
Fig. 3
a more detailed representation of a transition area between, for example, two two-tier dryer groups, in which a suction box is provided to support the web takeover.

Fig. 1 zeigt in schematischer Darstellung einen Übergangsbereich I von einer einreihigen Trockengruppe 10 zu einer unmittelbar darauffolgenden zweireihigen Trockengruppe 12 einer Trockenpartie 14 zum Trocknen einer laufenden Material- oder Faserstoffbahn, bei der es sich insbesondere um eine Papier- oder Kartonbahn handeln kann. Die Trockenpartie 14 kann somit insbesondere Teil einer Papiermaschine sein.Fig. 1 shows a schematic representation of a transition area I from a single-tier dryer group 10 to an immediately following one double-row dryer group 12 of a dryer section 14 for drying a running material or fiber web, which is particularly can be a paper or cardboard web. The dryer section 14 can in particular be part of a paper machine.

Die Trockenpartie 14 umfasst also mehrere in Bahn- oder Maschinenlaufrichtung L aufeinanderfolgende Trockengruppen 10, 12, von denen im vorliegenden Fall zumindest eine zweireihig ist.The dryer section 14 thus comprises several in the web or machine running direction L successive drying groups 10, 12, of which in the present case is at least a double row.

Wie anhand der Fig. 1 zu erkennen ist, ist die Materialbahn 16 in dem Übergangsbereich I von der einreihigen Trockengruppe 10 zu der darauffolgenden zweireihigen Trockengruppe 12 durchgehend abgestützt.As can be seen from FIG. 1, the material web 16 is in the Transition area I from the single-tier dryer group 10 to the next one double-row dryer group 12 supported continuously.

Dabei wird die Materialbahn 16 in diesem Übergangsbereich I durch das der nachfolgenden zweireihigen Trockengruppe 12 zugeordnete obere Trockensieb 18 direkt vom letzten Trockenzylinder 20 der vorangehenden einreihigen Trockengruppe 10 übernommen. Zur Unterstützung der Bahnübernahme in den Übergangsbereich I ist vorzugsweise ein Saugkasten 22 vorgesehen. Zudem ist die Materialbahn 16 in diesem Übergangsbereich I zusammen mit dem oberen Trockensieb 18 der nachfolgenden zweireihigen Trockengruppe 12 vorzugsweise um eine Saugwalze 24 geführt, bei der es sich z.B. um eine Saugfilzleitwalze und/oder Trockensiebsaugwalze handeln kann.The material web 16 is in this transition region I by the the following two-tier dryer group 12 assigned upper Dryer screen 18 directly from the last drying cylinder 20 of the previous one single-row dryer group 10. In support of Web transfer into transition area I is preferably a suction box 22 provided. In addition, the material web 16 is in this transition area I together with the upper dryer fabric 18 of the following two-row dryer group 12 preferably around a suction roller 24 managed, e.g. around a suction felt guide roller and / or dryer fabric suction roller can act.

Wie anhand der Fig. 1 zu erkennen ist, ist die Materialbahn 16 in der einreihigen Trockengruppe 10 abwechselnd über Trockenzylinder 20 und Bahnleitwalzen 26 geführt. Demgegenüber ist die Materialbahn 16 in der zweireihigen Trockengruppe 12 abwechselnd über Trockenzylinder 28 einer unteren Zylinderreihe und Trockenzylinder 30 einer oberen Zylinderreihe geführt. Außer dem oberen Trockensieb 18 für die obere Zylinderreihe ist ein unteres Trockensieb 32 für die untere Zylinderreihe der zweireihigen Trockengruppe 12 vorgesehen.As can be seen from FIG. 1, the material web 16 is in the single row dryer group 10 alternately via drying cylinders 20 and Web guide rollers 26 out. In contrast, the material web 16 is in the two-row dryer group 12 alternately via drying cylinder 28 a lower cylinder bank and drying cylinder 30 an upper cylinder bank guided. Except for the upper dryer fabric 18 for the upper row of cylinders is a lower dryer fabric 32 for the lower row of cylinders of the double row Dryer group 12 is provided.

Figur 2 zeigt in schematischer Darstellung einen Übergangsbereich II zwischen zwei unmittelbar aufeinander folgenden zweireihigen Trockengruppen 12 der Trockenpartie 14.Figure 2 shows a schematic representation of a transition area II between two consecutive two-tier dryer groups 12 of the dryer section 14.

Auch im vorliegenden Fall ist die Materialbahn 16 in dem Übergangsbereich I wieder durchgehend abgestützt. Dazu wird die Materialbahn 16 in diesem Übergangsbereich II durch das der nachfolgenden zweireihigen Trockengruppe 12 zugeordnete obere Trockensieb 18 direkt vom letzten Trockenzylinder 30 der vorangehenden zweireihigen Trockengruppe 12 übernommen.In the present case too, the material web 16 is in the transition region I continuously supported again. For this purpose, the material web 16 in this transition area II by that of the following two-row Upper dryer fabric 18 assigned to drying group 12 directly from the last one Drying cylinder 30 of the preceding two-row dryer group 12 accepted.

Zur Unterstützung der Bahnübernahme ist in dem Übergangsbereich II vorzugsweise wieder ein Saugkasten 22 vorgesehen. Überdies wird die Materialbahn 16 zusammen mit dem oberen Trockensieb 18 der nachfolgenden zweireihigen Trockengruppe 12 vorzugsweise wieder um eine Saugwalze 24, z.B. Saugfilzleitwalze und/oder Trockensiebsaugwalze, geführt.To support the railway takeover in transition area II again preferably a suction box 22 is provided. Moreover, the Material web 16 together with the upper dryer fabric 18 of the following two-tier dryer group 12 preferably again by one Suction roll 24, e.g. Suction felt guide roller and / or dryer fabric suction roller, guided.

In den beiden zweireihigen Trockengruppen 12 wird die Materialbahn 16 jeweils abwechselnd über Trockenzylinder 28 einer unteren Zylinderreihe und Trockenzylinder 30 einer oberen Zylinderreihe geführt. In jeder der beiden zweireihigen Trockengruppen 12 ist der oberen Zylinderreihe wieder ein oberes Trockensieb 18 und der unteren Zylinderreihe ein unteres Trockensieb 32 zugeordnet. Die Bahn- oder Maschinenlaufrichtung ist auch in dieser Fig. 2 wieder durch einen Pfeil "L" angedeutet.The material web 16 is in the two double-row dryer groups 12 alternately via drying cylinder 28 of a lower row of cylinders and drying cylinder 30 guided an upper row of cylinders. In each of the two two-tier dryer groups 12 is the top row of cylinders again an upper dryer wire 18 and the lower row of cylinders a lower one Dryer screen 32 assigned. The web or machine direction is in this Fig. 2 again indicated by an arrow "L".

Die Materialbahn 16 kann zweckmäßigerweise in sämtlichen jeweils zwischen zwei Trockengruppen 10, 12 vorgesehenen Übergangsbereichen jeweils durchgehend abgestützt sein. So kann beispielsweise auch zwischen einreihigen Trockengruppen die Materialbahn 16 jeweils durchgehend abgestützt sein. Auch in diesem Fall können zwischen dem betreffenden Gruppen insbesondere wieder ein Saugkasten und/oder eine Saugfilzleitwalze vorgesehen sein.The material web 16 can expediently in all between two drying groups 10, 12 provided transition areas be supported continuously. For example, between single-row dryer groups the material web 16 continuously be supported. In this case too, you can choose between the relevant Groups in particular a suction box and / or one Suction felt guide roller can be provided.

Fig. 3 zeigt in einer detaillierteren Darstellung nochmals den Übergangsbereich II zwischen zwei zweireihigen Trockengruppen 12 (vgl. auch Fig. 2).3 shows the transition area again in a more detailed representation II between two double-tier dryer groups 12 (see also Fig. 2).

Dabei ist in dem Übergangsbereich II insbesondere wieder der zur Unterstützung der Bahnübernahme vorgesehene Saugkasten 22 zu erkennen. Die Materialbahn 16 kann zusammen mit dem oberen Trockensieb 18 der nachfolgenden Trockengruppe 12 insbesondere auch wieder um eine Saugwalze 24 geführt sein, bei der es sich z.B. wieder um eine Saugfilzleitwalze und/oder eine Trockensiebsaugwalze handeln kann.In the transition area II there is in particular that for support the suction box 22 provided for the web takeover. The material web 16 can together with the upper dryer fabric 18 subsequent drying group 12 in particular also by one Suction roller 24 can be guided, which is e.g. again a suction felt guide roller and / or a dryer fabric suction roller can act.

Auch im übrigen entspricht der Übergangsbereich II zumindest im wesentlichen wieder dem in der Fig. 2 dargestellten Übergangsbereich II. Einander entsprechenden Teilen sind gleiche Bezugszeichen zugeordnet.Otherwise, transition area II corresponds at least essentially again the transition area II shown in FIG. 2. Corresponding parts are assigned the same reference numerals.

Wie bereits erwähnt, können ein solcher Saugkasten 22 und/oder eine solche Saugwalze 24 insbesondere auch in einem jeweiligen Übergangsbereich I von einer einreihigen Trockengruppe 10 zu einer unmittelbar darauffolgenden zweireihigen Trockengruppe 12 vorgesehen sein (vgl. Fig. 1) und/oder z.B. in einem jeweiligen Übergangsbereich zwischen zwei einzonigen Trockengruppen vorgesehen sein.As already mentioned, such a suction box 22 and / or one such suction roller 24 in particular in a respective transition area I from a single-tier dryer group 10 to an immediately following one two-row dryer group 12 may be provided (see FIG. 1) and / or e.g. in a respective transition area between two zones Drying groups can be provided.

Das Vakuum in der jeweiligen Saugwalze 24 kann insbesondere über den Saugkasten 22 erzeugt werden.The vacuum in the respective suction roller 24 can in particular be via the Suction box 22 are generated.

Von Vorteil ist insbesondere, dass in Kombination mit einer abwärts gerichteten Bahnabnahme vom Trockenzylinder 20, 30 der vorangehenden Trockengruppe 10, 12 eine Saugwalze 24 im Bereich der unteren Umleitung des Trockensiebes 18 und ein Saugkasten 22 zur Stabilisierung der Bahnführung zwischen den Trockenzylindern 20, 30; 30 und der Saugwalze 24 vorgesehen sind. It is particularly advantageous that in combination with a downward directional web acceptance from the drying cylinder 20, 30 of the preceding Drying group 10, 12 a suction roller 24 in the area of the lower diversion of the dryer fabric 18 and a suction box 22 for stabilizing the Web guidance between the drying cylinders 20, 30; 30 and the suction roller 24 are provided.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
einreihige Trockengruppesingle-tier dryer group
1212
zweireihige Trockengruppedouble-tier dryer group
1414
Trockenpartiedrying section
1616
Materialbahnweb
1818
oberes Trockensiebupper dryer fabric
2020
Trockenzylinderdrying cylinders
2222
Saugkastensuction box
2424
Saugwalzesuction roll
2626
Bahnleitwalzeweb guide
2828
Trockenzylinderdrying cylinders
3030
Trockenzylinderdrying cylinders
3232
unteres Trockensieblower dryer fabric
LL
Bahn- oder MaschinenlaufrichtungWeb or machine direction
II
ÜbergangsbereichTransition area
IIII
ÜbergangsbereichTransition area

Claims (12)

Trockenpartie (14) zum Trocknen einer laufenden Materialbahn (16), insbesondere Papier- oder Kartonbahn, mit mehreren in Bahnlaufrichtung (L) aufeinander folgenden Trockengruppen (10, 12), von denen zumindest eine zweireihig ist, wobei die Materialbahn (16) zumindest in einem jeweiligen Übergangsbereich (I) von einer einreihigen Trockengruppe (10) zu einer unmittelbar darauf folgenden zweireihigen Trockengruppe (12) und/oder in einem jeweiligen Übergangsbereich (II) zwischen zwei unmittelbar aufeinander folgenden zweireihigen Trockengruppen (12) jeweils durchgehend abgestützt ist.Drying section (14) for drying a running material web (16), in particular paper or cardboard web, with several in the direction of web travel (L) successive drying groups (10, 12), of at least one of which is in two rows, the material web (16) at least in a respective transition area (I) from a single row Drying group (10) to an immediately following one double-row dryer group (12) and / or in a respective transition area (II) between two immediately following one another double-row dryer groups (12) each supported continuously is. Trockenpartie nach Anspruch 1,
dadurch gekennzeichnet, dass die Materialbahn (16) in einem jeweiligen Übergangsbereich (I, II) durch ein der nachfolgenden zweireihigen Trockengruppe (12, 30) zugeordnetes Trockensieb (18) direkt vom letzten Trockenzylinder (20) der vorangehenden Trockengruppe (10, 12) übernommen wird.Dryer section according to claim 1,
characterized in that the material web (16) in a respective transition area (I, II) is taken over by a drying screen (18) assigned to the following two-row drying group (12, 30) directly from the last drying cylinder (20) of the preceding drying group (10, 12) becomes. Trockenpartie nach Anspruch 2,
dadurch gekennzeichnet, dass die Materialbahn (16) von einem oberen Trockensieb (18) der nachfolgenden zweireihigen Trockengruppe (12) übernommen wird. Dryer section according to claim 2,
characterized in that the material web (16) is taken over by an upper dryer fabric (18) of the subsequent two-row dryer group (12). Trockenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Materialbahn (16) in sämtlichen jeweils zwischen zwei Trockengruppen (10, 12) vorgesehenen Übergangsbereichen jeweils durchgehend abgestützt ist.Dryer section according to one of the preceding claims,
characterized in that the material web (16) is continuously supported in each of the transition areas provided between two drying groups (10, 12). Trockenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass zur Unterstützung der Bahnübername in einem jeweiligen Übergangsbereich (I, II) ein Saugkasten (22) vorgesehen ist.Dryer section according to one of the preceding claims,
characterized in that a suction box (22) is provided in a respective transition area (I, II) to support the web transfer. Trockenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Materialbahn (16) in einem jeweiligen Übergangsbereich (I, II) um eine Saugwalze (24), insbesondere eine Saugfilzleitwalze und/oder Trockensiebsaugwalze geführt ist.Dryer section according to one of the preceding claims,
characterized in that the material web (16) is guided in a respective transition region (I, II) around a suction roll (24), in particular a suction felt guide roll and / or a dryer fabric suction roll. Trockenpartie nach Anspruch 6,
dadurch gekennzeichnet, dass die Materialbahn (16) zusammen mit dem oberen Trockensieb (18) der nachfolgenden zweireihigen Trockengruppe (12) um die Saugwalze (24) geführt ist.Dryer section according to claim 6,
characterized in that the material web (16) is guided around the suction roller (24) together with the upper dryer fabric (18) of the subsequent two-row dryer group (12). Trockenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass das Vakuum in der Saugwalze (24) über den Saugkasten (22) erzeugt ist.Dryer section according to one of the preceding claims,
characterized in that the vacuum in the suction roller (24) is generated via the suction box (22). Trockenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass in Kombination mit einer abwärts gerichteten Bahnabnahme vom Trockenzylinder (20, 30) der vorangehenden Trockengruppe (10, 12) eine Saugwalze (24) im Bereich der unteren Umleitung des Trockensiebes (18) und ein Saugkasten (22) zur Stabilisierung der Bahnführung zwischen den Trockenzylindern (20, 30; 30) und der Saugwalze (24) vorgesehen sind.Dryer section according to one of the preceding claims,
characterized in that in combination with a downward web removal from the drying cylinder (20, 30) of the preceding drying group (10, 12) a suction roller (24) in the area of the lower bypass of the drying wire (18) and a suction box (22) for stabilizing the Web guidance between the drying cylinders (20, 30; 30) and the suction roller (24) are provided. Trockenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass in der Saugwalze (24) und dem Saugkasten in dem Bereich, in dem der Überführstreifen beim Überführvorgang läuft, Überführrandzonen vorgesehen sind.Dryer section according to one of the preceding claims,
characterized in that transfer edge zones are provided in the suction roll (24) and the suction box in the area in which the transfer strip runs during the transfer process. Trockenpartie nach Anspruch 10,
dadurch gekennzeichnet, dass die Überführzonen z.B. am führerseitigen Maschinenrand vorgesehen sind.Dryer section according to claim 10,
characterized in that the transfer zones are provided, for example, on the driver's machine edge. Trockenpartie nach Anspruch 10 oder 11,
dadurch gekennzeichnet,
das die Überführzonen unabhängig von der restlichen Zone mit Vakuum beaufschlagbar sind.Dryer section according to claim 10 or 11,
characterized by
that the transfer zones can be subjected to a vacuum independently of the remaining zone.
EP03100377A 2002-04-19 2003-02-19 Drying section Expired - Lifetime EP1355003B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10217571 2002-04-19
DE10217571A DE10217571A1 (en) 2002-04-19 2002-04-19 drying section

Publications (3)

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EP1355003A2 true EP1355003A2 (en) 2003-10-22
EP1355003A3 EP1355003A3 (en) 2004-04-14
EP1355003B1 EP1355003B1 (en) 2008-06-18

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ID=28458933

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US (1) US6823606B2 (en)
EP (1) EP1355003B1 (en)
AT (1) ATE398702T1 (en)
DE (2) DE10217571A1 (en)

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US5600897A (en) * 1993-08-06 1997-02-11 J.M. Voith Gmbh Mixed dryer section including single-tier and double-tier drying groups with automatic ropeless threading
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Also Published As

Publication number Publication date
EP1355003B1 (en) 2008-06-18
EP1355003A3 (en) 2004-04-14
ATE398702T1 (en) 2008-07-15
DE50309993D1 (en) 2008-07-31
DE10217571A1 (en) 2003-11-06
US20030196345A1 (en) 2003-10-23
US6823606B2 (en) 2004-11-30

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