EP1116823A2 - Section de séchage - Google Patents

Section de séchage Download PDF

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Publication number
EP1116823A2
EP1116823A2 EP00123589A EP00123589A EP1116823A2 EP 1116823 A2 EP1116823 A2 EP 1116823A2 EP 00123589 A EP00123589 A EP 00123589A EP 00123589 A EP00123589 A EP 00123589A EP 1116823 A2 EP1116823 A2 EP 1116823A2
Authority
EP
European Patent Office
Prior art keywords
transfer
drying
fibrous web
section according
belt
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
EP00123589A
Other languages
German (de)
English (en)
Other versions
EP1116823A3 (fr
EP1116823B1 (fr
Inventor
Markus Oechsle
Gerhard Kotitschke
Roland Mayer
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.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
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 Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1116823A2 publication Critical patent/EP1116823A2/fr
Publication of EP1116823A3 publication Critical patent/EP1116823A3/fr
Application granted granted Critical
Publication of EP1116823B1 publication Critical patent/EP1116823B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F2/00—Transferring continuous webs from wet ends to press sections
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/06—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path
    • F26B13/08—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path using rollers

Definitions

  • the invention relates to a dryer section for drying a fibrous web, in particular a paper, cardboard or tissue web in manufacturing machines and / or refining the same consisting of several drying groups, in which the fibrous web is guided over heated drying cylinders and guide rolls, whereby the fibrous web against at least one band of the respective drying group the outer surface of the drying cylinder pressed and the fibrous web at least a transfer point between two moving transfer elements is transferred and the receiving transfer element has a higher speed than that has transferring transfer element.
  • Wet fibrous webs are particularly common in press and Drying areas for stretching due to the action of external forces, such as adhesive forces Rolls and belts, centrifugal forces and forces due to negative pressure or Air currents. This stretching can in turn cause wrinkling or even Demolition.
  • the accepting Transfer elements are often driven at a higher speed, that is to say a train is set up at the transfer point.
  • the transfer of the fibrous web generally takes place from the last one Drying cylinder of one dryer group to the dryer fabric of the following Drying group, the drying wire the drying cylinder at least slightly wraps around. On the one hand, this looping ensures a safe transfer of the However, fibrous web, especially at high web speeds, is limited to on the other hand, the maximum speed difference between the Transfer elements.
  • the object of the invention is therefore a way to build a possible small but sufficient speed difference between the Transfer elements while ensuring safe guidance and To deliver the fibrous web at the transfer point.
  • the object was achieved in that the transfer elements the transfer point with speed difference is not pressed against each other be and have a distance of less than 70 mm.
  • the distance between the transfer elements is so small that there is still a safe guidance of the fibrous web at the transfer point. It is advantageous here if the distance between the transfer elements at the transfer point with a speed difference is greater than zero and less than 35 mm.
  • the transfer elements can be used as a roller, preferably as a drying cylinder and / or as a belt, preferably as a dryer fabric. Should a tape be used Application, it is advantageous if the transfer element to be taken over is designed as a belt and at the transfer point via a suction element, is preferably performed in the form of a vacuumed roller.
  • the suction element supports the takeover of the fibrous web and the adhesion to taking over band.
  • Transfer element be a ribbon. This allows the sag to be neglected the often very wide rollers in the formation of the transfer point.
  • the tape should be the However, do not wrap the roller at the transfer point to reduce the force on the Minimize fibrous web.
  • the means being able to build a train, should the first dryer group only one or have two, preferably a drying cylinder. This should be the speed the transfer element at the transfer point between the first and second drying group at most 2.5%, preferably 0.5 to 2.0% higher than that of the transferring transfer element.
  • the fibrous web 1 runs through at least one of two in the press section Press rolls 10 formed press nip.
  • the pressed out in the press nip Water is taken up by endlessly circulating press felts 9, which together are guided through the press nip with the fibrous web 1.
  • An example is given here the removal of the fibrous web 1 from the press felt 9 of the lower press rolls 10 of the last or only press nip and transport with an air permeable Volume 4 in the form of a dryer fabric.
  • the decrease is vacuumed and supported by the belt 4 wrapped guide roller.
  • the suctioned Guide roller a perforated roller jacket, the interior of which with a Vacuum source is connected.
  • the belt 4 guides the fibrous web 1 to the single, heated drying cylinder 2 of the first dryer group of the dryer section and presses the fibrous web 1 against the Shell surface of the heated drying cylinder 2. This causes heating the fibrous web 1 and to evaporate the moisture contained in it.
  • the belt 4 can also be used as an air-impermeable transfer belt or as an air-permeable one Transfer felt be carried out, which the fibrous web 1 from the press section to leads first drying cylinder 2 of the dryer section and even together with the Fibrous web 1 can run through the last press nip of the press section.
  • the belt runs Fibrous web 1 to the transfer point 5 on the drying cylinder 2 on.
  • the fibrous web 1 from a belt 4 of the second Drying group in the form of an air-permeable drying sieve.
  • This Band 4 passes the fibrous web 1 alternately in the second dryer group heated drying cylinders 2 arranged in an upper row and suctioned in one Lower row arranged guide rollers 3, the fibrous web 1 against the Shell surface of the drying cylinder 2 is pressed.
  • the transfer of the fibrous web 1 between the transfer element 6 in the form of Drying cylinder 2 of the first dryer group and the transfer element 7 in shape the belt 4 of the second drying group is here by a suction element 8 supported.
  • the suction element 8 which is embodied as a suction-guided guide roller, Volume 4 wrapped around.
  • the distance between the transfer elements 6, 7 at the transfer point 5 is smaller than 35 mm, but also no press nip between the drying cylinder 2 first drying group and the suction element 8 is formed. Since it too too no wrapping of the drying cylinder 2 of the first dryer group by the Volume 4 of the second drying group can be a sufficiently large train between the two drying groups. For this it is usually sufficient if the speed of the transfer element 7 taking over 0.5 to 2% is higher than that of the transferring transfer element 6. On the other hand the distance between the transfer elements 6.7 so small that the safe guidance the fibrous web 1 is not at risk. In addition, the tour is still through Suction element 8 additionally stabilized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Paper (AREA)
EP00123589A 1999-12-10 2000-10-28 Section de séchage Expired - Lifetime EP1116823B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19959669 1999-12-10
DE19959669A DE19959669A1 (de) 1999-12-10 1999-12-10 Trockenpartie

Publications (3)

Publication Number Publication Date
EP1116823A2 true EP1116823A2 (fr) 2001-07-18
EP1116823A3 EP1116823A3 (fr) 2002-06-26
EP1116823B1 EP1116823B1 (fr) 2005-04-06

Family

ID=7932202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00123589A Expired - Lifetime EP1116823B1 (fr) 1999-12-10 2000-10-28 Section de séchage

Country Status (4)

Country Link
US (1) US6367164B1 (fr)
EP (1) EP1116823B1 (fr)
CA (1) CA2327922A1 (fr)
DE (2) DE19959669A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1347097A2 (fr) * 2002-03-23 2003-09-24 Voith Paper Patent GmbH Dispositif de pressage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1158092B1 (fr) * 2000-05-24 2006-09-06 Voith Paper Patent GmbH Section de séchage
FI121081B (fi) * 2002-01-08 2010-06-30 Metso Paper Automation Oy Menetelmä ja laitteisto paperikoneen tai paperirainan jälkikäsittelylaitteen yhteydessä

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0426607A2 (fr) * 1989-11-03 1991-05-08 Beloit Corporation Dispositif de transfert
DE4201107A1 (de) * 1991-01-24 1992-08-06 Voith Gmbh J M Trockenpartie
DE4220682C1 (de) * 1992-06-24 1993-12-23 Voith Gmbh J M Vorrichtung zum Überführen einer Faserstoffbahn

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5184408A (en) * 1990-01-19 1993-02-09 J. M. Voith Gmbh Dryer section
US5355593A (en) 1992-06-24 1994-10-18 J.M. Voith Gmbh Device for transferring a fiber web
US5526579A (en) * 1993-02-17 1996-06-18 J.M. Voith Gmbh Dryer section
DE4328555A1 (de) * 1993-08-25 1994-03-31 Voith Gmbh J M Trockenpartie
US5632101A (en) * 1994-09-16 1997-05-27 Voith Sulzer Papiermaschinen Gmbh All top-felted single-tier drying section with post drying section curl control
US5771603A (en) * 1994-09-16 1998-06-30 Voith Sulzer Papiermashinen Gmbh Dryer section
US5638611A (en) * 1995-10-18 1997-06-17 Voith Sulzer Papiermaschinen Gmbh Single-tier drying section tailored for compensating stretching and shrinking of paper web
DE19543086A1 (de) * 1995-11-18 1997-05-22 Voith Sulzer Papiermasch Gmbh Trockenpartie
DE19615226A1 (de) * 1996-04-18 1997-10-23 Voith Sulzer Papiermasch Gmbh Trockenpartie
DE19642526A1 (de) * 1996-10-15 1998-04-16 Voith Sulzer Papiermasch Gmbh Trockenpartie
DE19805723A1 (de) * 1998-02-12 1999-08-19 Voith Sulzer Papiertech Patent Trockenpartie sowie Verfahren zum Betreiben einer solchen Trockenpartie

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0426607A2 (fr) * 1989-11-03 1991-05-08 Beloit Corporation Dispositif de transfert
DE4201107A1 (de) * 1991-01-24 1992-08-06 Voith Gmbh J M Trockenpartie
DE4220682C1 (de) * 1992-06-24 1993-12-23 Voith Gmbh J M Vorrichtung zum Überführen einer Faserstoffbahn

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1347097A2 (fr) * 2002-03-23 2003-09-24 Voith Paper Patent GmbH Dispositif de pressage
EP1347097A3 (fr) * 2002-03-23 2004-03-17 Voith Paper Patent GmbH Dispositif de pressage

Also Published As

Publication number Publication date
DE19959669A1 (de) 2001-06-13
EP1116823A3 (fr) 2002-06-26
EP1116823B1 (fr) 2005-04-06
CA2327922A1 (fr) 2001-06-10
US6367164B1 (en) 2002-04-09
DE50009987D1 (de) 2005-05-12

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