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EP1316641B1 - Section de pressage - Google Patents

Section de pressage

Info

Publication number
EP1316641B1
EP1316641B1 EP02016712A EP02016712A EP1316641B1 EP 1316641 B1 EP1316641 B1 EP 1316641B1 EP 02016712 A EP02016712 A EP 02016712A EP 02016712 A EP02016712 A EP 02016712A EP 1316641 B1 EP1316641 B1 EP 1316641B1
Authority
EP
European Patent Office
Prior art keywords
press
fibrous material
material web
transfer belt
press nip
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.)
Expired - Lifetime
Application number
EP02016712A
Other languages
German (de)
English (en)
Other versions
EP1316641A1 (fr
Inventor
Ulrich Begemann
Ingolf Cedra
Thomas Augscheller
Georg Dr. Kleiser
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 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 Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1316641A1 publication Critical patent/EP1316641A1/fr
Application granted granted Critical
Publication of EP1316641B1 publication Critical patent/EP1316641B1/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
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof

Definitions

  • the invention relates to a press section for dewatering a paper, board, tissue or another fibrous web with at least three press nips, according to the preamble of claim 1.
  • Such a press section is known, for example, from document US Pat. No. 5,762,761.
  • Presses with three press nips are known, the two first being executed mostly extended in the interest of a high dewatering performance and double felted and the last press nip is simply felted.
  • the smoothness arises essentially by the contact of the fibrous web with a smooth press roll in the last press nip.
  • the object of the invention is therefore to ensure a low two-sidedness in terms of roughness in the press section in addition to a high dewatering performance.
  • the object has been solved by the features of the characterizing part of claim 1. It is advantageous if the transfer belt runs only through a press nip and the fibrous web from the press nip with the transfer belt to a following Pressing gap passes, wherein this following press nip is formed by two press rolls, one of which, has a smooth surface and comes into contact with the fibrous web.
  • the three press nips ensure high drainage performance.
  • the smoothness on both sides of the fibrous web is increased to about the same extent.
  • the press nip should be made longer with the transfer belt and preferably be formed by a shoe roll and a cylindrical counter roll.
  • the press nip should be preceded by a press nip with the transfer belt and this upstream press nip preferably forms the first press nip of the press section.
  • the upstream press nip can be made longer and preferably formed by a shoe roll and a cylindrical counter roll or else be formed to minimize the expense of two cylindrical press rolls.
  • the following press nip should be the last press nip of the press section. It is sufficient if the following press nip of two cylindrical press rolls is formed. For the smoothing result and in the interest of preheating the fibrous web for a subsequent drying process, it is advantageous if at least one press roll of the following press nip is heated, this heated press roll preferably comes into contact with the fibrous web.
  • the fibrous web should at least from the first to the last press nip of the press section of at least one band in the form of a dewatering belt, transfer tape or the like. be supported.
  • the press section For drying the fibrous web, the press section generally follows a drying section with preferably several drying groups for drying the fibrous web.
  • at least the first dryer section of the dryer section should be formed by a series of drying cylinders, between which guide rollers are arranged, wherein the fibrous web wraps around the drying cylinders and guide rollers in a meandering manner supported by a drying wire. This allows for simplification or conversions that the heated press roll of the following press nip is formed by a drying cylinder.
  • a suction device is assigned to the drying wire, which reinforces the adhesion of the fibrous web to the drying wire.
  • a suction zone with increased negative pressure should be present in this area. In conjunction with the relatively high dry contents in the press section and a possible closed guidance of the fibrous web, this allows very high web speeds.
  • a particularly simple structure results when the transfer belt runs over the fibrous web.
  • the dewatering belt running under the transfer belt can transfer the fibrous web directly to the dewatering belt of the following press nip extending above the fibrous web.
  • This in turn allows the smooth press roller of the following press nip arranged below the fibrous web to transfer the fibrous web preferably directly to the dryer fabric of the first dryer group running above the fibrous web.
  • Drying groups with dryer fabric running above the fibrous web offer considerable advantages in case of possible demolition or during transfer, since the fibrous web can be discharged into the machine cellar without difficulty. It can with advantage, the transfer of the fibrous web to the dryer fabric of a looped by the dryer fabric suction device in the form of a suction roll, a suction box or the like. get supported.
  • the fibrous web is transferred from the transfer belt to another, preferably air-permeable transfer belt and from there to the running below the fibrous web dewatering belt of the following press nip.
  • the drainage tapes should be designed as press felts.
  • the smooth transfer belt should be impermeable to air and water.
  • the smooth transfer belt runs only through the last press nip and the smooth press roll is present in the second press nip and comes into contact with the fibrous web.
  • the press section has three press nips, which are formed by two rotating press rolls 7, 8, 9, 10, 11, 12 pressed against one another, wherein at least one dewatering belt 2, 3, 4, 5 is passed through each press nip in addition to the fibrous web 1.
  • the endless circulating dewatering belts 2, 3, 4, 5 serve to receive and transport the water pressed out of the fibrous web 1 in the press nip and are designed here as air-permeable and water-permeable press felts.
  • the first two press nips of the press section are designed to be extended and are each formed by a shoe roller 9,11 located above the fibrous web 1 and a lower cylindrical counter roller 10,12.
  • the extended press nip allows intensive and yet gentle dewatering of the fibrous web 1.
  • the shoe rolls 9, 11 have a flexible roll shell, which is guided in the region of the press nip via a contact element with a concave press surface.
  • a dewatering belt 2, 3 is guided through this on both sides of the fibrous web 1.
  • the dewatering belt 2 running above the fibrous web 1 takes over the fibrous web 1 from a forming wire 18 of a former upstream of the press section for sheet formation.
  • the lower dewatering belt 3 of the first press nip transfers the fibrous web 1 after the press nip to a smooth, endlessly circulating and air- and water-impermeable transfer belt 6 of the second press nip, which extends over the fibrous web 1.
  • the fibrous web 1 then passes through together with the transfer belt 6 and the running below Dewatering belt 4 the second press nip. Because of the pre-dewatering in the first, upstream press nip a dewatering belt 4 is sufficient in the second press nip for receiving the squeezed water.
  • the upper side of the fibrous web 1 is smoothed.
  • the lower dewatering belt 4 of the second press nip transfers the fibrous web 1 to a dewatering belt 5 running over the fibrous web 1 of the following, last press nip of the press section.
  • This third press nip is formed by two cylindrical press rolls 7, 8, one of which is deflection-controlled.
  • the fibrous web 1 comes before, in and after the last press nip with the lower press roller 8 in direct contact.
  • the lower press roller 8 therefore has a smooth and closed surface. This succeeds in significantly reducing the two-sidedness of the smoothness.
  • the lower pressure roller 8 is still heated, so that already a predrying of the fibrous web 1 takes place.
  • This heating also promotes by the formation of a vapor cushion, the detachment and transfer of the fibrous web 1 to a dryer 15 of the first dryer group of the following dryer section for drying the fibrous web 1.
  • the dryer wire 15 is guided directly to the lower press roller 8, wherein the decrease of the fibrous web 1 is supported by a suction device 16 looped around by the drying wire 15 in the form of a known suction box.
  • At least the first dryer group is formed by a series of drying cylinders 13, between which guide rollers 14 are arranged, wherein the fibrous web 1, meandering from the dryer wire 15, wraps around the drying cylinders 13 and guide rollers 14. In this case, the fibrous web 1 comes to dry directly in contact with the heated drying cylinders 13. In the web running direction 17 can then follow similar or other dry groups of the dryer section.
  • the acquisition of the fibrous web 1 by an air-permeable Dewatering belt 2.5 are supported by means of a suctioned by the respective dewatering belt 2.5 suctioned roller.

Landscapes

  • Paper (AREA)
  • Resistance Heating (AREA)

Claims (18)

  1. Section de pressage pour l'égouttage d'une nappe de papier, carton, papier-tissu ou d'une autre nappe fibreuse (1) comprenant au moins trois fentes de pressage, au moins à chaque fois une bande d'égouttage sans fin (2, 3, 4, 5) servant à recevoir l'eau exprimée étant guidée à travers les fentes de pressage en plus de la nappe fibreuse (1), au moins un rouleau de pressage (8) participant à la formation d'une fente de pressage présentant une surface lisse et venant en contact avec la nappe fibreuse (1), la nappe fibreuse (1) étant guidée conjointement avec une bande de transfert sans fin lisse (6) à travers au moins une fente de pressage, et la bande de transfert (6) venant en contact avec le côté de la nappe fibreuse (1) opposé au rouleau de pressage lisse (8),
    caractérisée en ce que
    la bande de transfert (6) s'étend sur la nappe fibreuse (1) et la bande d'égouttage (4) s'étendant sous la bande de transfert (6) transfère la nappe fibreuse (1) directement à la bande d'égouttage (5) de la fente de pressage suivante, s'étendant au-dessus de la nappe fibreuse (1) ou la bande de transfert (6) s'étend sous la nappe fibreuse (6) et la nappe fibreuse (1) est transférée de la bande de transfert (6) à une autre bande de transfert, de préférence perméable à l'air, et de celle-ci à la bande d'égouttage de la fente de pressage suivante, s'étendant sous la nappe fibreuse (1).
  2. Section de pressage selon la revendication 1, caractérisée en ce que la bande de transfert (6) ne passe que par une fente de pressage.
  3. Section de pressage selon la revendication 2, caractérisée en ce que la nappe fibreuse (1) parvient de la fente de pressage avec la bande de transfert (6) à une fente de pressage suivante, cette fente de pressage suivante étant formée par deux rouleaux de pressage (7, 8), dont un (8) présente une surface lisse et vient en contact avec la nappe fibreuse (1).
  4. Section de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que la fente de pressage avec la bande de transfert (6) est réalisée de manière prolongée et est formée de préférence par un rouleau de sabot (9) et un contre-rouleau cylindrique (10).
  5. Section de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que la fente de pressage avec la bande de transfert (6) est montée après une fente de pressage et cette fente de pressage montée avant forme de préférence la première fente de pressage de la section de pressage.
  6. Section de pressage selon la revendication 5, caractérisée en ce qu'une bande d'égouttage respective (2, 3) est guidée des deux côtés de la nappe fibreuse (1) à travers la fente de pressage montée avant.
  7. Section de pressage selon la revendication 5 ou 6, caractérisée en ce que la fente de pressage montée avant est réalisée de manière prolongée et est formée de préférence par un rouleau de sabot (11) et un contre-rouleau cylindrique (12).
  8. Section de pressage selon l'une quelconque des revendications précédentes 3 à 7, caractérisée en ce que la fente de pressage suivant la fente de pressage avec la bande de transfert (6) est la dernière fente de pressage de la section de pressage.
  9. Section de pressage selon l'une quelconque des revendications précédentes 3 à 8, caractérisée en ce que la fente de pressage suivant la fente de pressage avec la bande de transfert (6) est formée de deux rouleaux de pressage cylindriques (7, 8).
  10. Section de pressage selon l'une quelconque des revendications précédentes 3 à 9, caractérisée en ce qu'au moins un rouleau de pressage (8) de la fente de pressage suivant la fente de pressage avec la bande de transfert (6) est chauffé, ce rouleau de pressage chauffé (8) venant de préférence en contact avec la nappe fibreuse (1).
  11. Section de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que la nappe fibreuse (1) est supportée au moins de la première à la dernière fente de pressage de la section de pressage par au moins une bande sous forme de bande d'égouttage (2, 3, 4, 5) ou de bande de transfert (6).
  12. Section de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que la section de pressage est suivi d'une section de séchage avec de préférence plusieurs groupes de séchage pour le séchage de la nappe fibreuse (1).
  13. Section de pressage selon la revendication 12, caractérisée en ce qu'au moins le premier groupe de séchage de la section de séchage est formé par une rangée de cylindres de séchage (13) entre lesquels sont disposés des rouleaux directeurs (14), la nappe fibreuse (1) étant supportée en méandres par une toile de séchage (15) et enveloppant les cylindres de séchage (13) et les rouleaux directeurs (14).
  14. Section de pressage selon la revendication 12 ou 13, caractérisée en ce que le rouleau de pressage chauffé (8) de la fente de pressage suivante est formé par un cylindre de séchage (13).
  15. Section de pressage selon l'une quelconque des revendications précédentes 12 à 14, caractérisée en ce que la bande de transfert (6) s'étend sur la nappe fibreuse (1) et la bande d'égouttage (4) s'étendant sous la bande de transfert transfère directement la nappe fibreuse à la bande d'égouttage (5) de la fente de pressage suivante, s'étendant au-dessus de la nappe fibreuse, et le rouleau de pressage (8) de la fente de pressage suivante, disposé sous la nappe fibreuse (1), transfère de préférence directement la nappe fibreuse (1) à la toile de séchage (15) du premier groupe de séchage, s'étendant au-dessus de la nappe fibreuse (1).
  16. Section de pressage selon la revendication 15, caractérisée en ce que le transfert de la nappe fibreuse (1) à la toile de séchage (15) est supporté par un dispositif d'aspiration (16) enveloppé par la toile de séchage (15) sous la forme d'un rouleau aspirant ou d'une caisse aspirante.
  17. Section de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que les bandes d'égouttage (2, 3, 4, 5) sont réalisées sous forme de feutres de presse.
  18. Section de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que la bande de transfert lisse (6) est réalisée de manière imperméable à l'air et à l'eau.
EP02016712A 2001-12-01 2002-07-26 Section de pressage Expired - Lifetime EP1316641B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10159115A DE10159115A1 (de) 2001-12-01 2001-12-01 Pressenpartie
DE10159115 2001-12-01

Publications (2)

Publication Number Publication Date
EP1316641A1 EP1316641A1 (fr) 2003-06-04
EP1316641B1 true EP1316641B1 (fr) 2006-10-04

Family

ID=7707748

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02016712A Expired - Lifetime EP1316641B1 (fr) 2001-12-01 2002-07-26 Section de pressage

Country Status (4)

Country Link
US (1) US6863776B2 (fr)
EP (1) EP1316641B1 (fr)
AT (1) ATE341661T1 (fr)
DE (2) DE10159115A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011005747A1 (de) 2011-03-18 2012-09-20 Voith Patent Gmbh Blattbindungsvorrichtung
DE102011081239A1 (de) 2011-08-19 2013-02-21 Voith Patent Gmbh Blattbildungsvorrichtung
DE102011083367A1 (de) 2011-09-26 2013-03-28 Voith Patent Gmbh Former für eine Maschine zur Herstellung einer Faserstoffbahn aus wenigstens einer Faserstoffsuspension

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1662042B1 (fr) * 2003-05-13 2009-11-04 Oji Paper Co., Ltd. Presse a lisser de presse a papier, presse de machine a papier a presse a lisser, et procede de fabrication de papier
FI114647B (fi) * 2003-07-02 2004-11-30 Metso Paper Inc Sovitelma rainan hallitsemiseksi paperi- tai kartonkikoneen puristinosalla
DE10333139A1 (de) * 2003-07-22 2005-02-17 Voith Paper Patent Gmbh Pressenpartie
DE10342733A1 (de) * 2003-09-16 2005-04-21 Voith Paper Patent Gmbh Pressanordnung
DE102005001890A1 (de) * 2005-01-15 2006-07-20 Voith Paper Patent Gmbh Pressanordnung
DE102005031202A1 (de) * 2005-07-01 2007-01-25 Voith Patent Gmbh Verfahren zur Herstellung einer Papierbahn, insbesondere Tiefdruckpapier
DE102005050281A1 (de) * 2005-10-20 2007-04-26 Voith Patent Gmbh Pressanordnung
DE102005050282A1 (de) * 2005-10-20 2007-06-14 Voith Patent Gmbh Pressanordnung
HUE057727T2 (hu) * 2014-09-15 2022-06-28 Upm Specialty Papers Oy Gyártási eljárás alacsony súlyú, kiváló minõségû papír elõállítására egy leválasztható réteg hordozórétegeként való alkalmazásra egy heveder-összeállítással

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
JPH01139890A (ja) * 1987-11-25 1989-06-01 Mitsubishi Heavy Ind Ltd 抄紙機プレス装置
DE4321406A1 (de) * 1993-06-26 1993-11-11 Voith Gmbh J M Naßpartie einer Papiermaschine mit einer Siebpartie und einer Pressenpartie
DE4340041A1 (de) * 1993-11-24 1994-04-07 Voith Gmbh J M Pressenpartie für eine Papiermaschine
US5876565A (en) * 1994-10-06 1999-03-02 Valmet Corporation Press section with an equalizing nip for compensating for elongation of a paper web
FI95610C (fi) * 1994-10-06 1996-02-26 Valmet Paper Machinery Inc Tasauspuristimella varustettu paperikoneen puristinosa
FI114227B (fi) * 1995-04-24 2004-09-15 Metso Paper Inc Paperikone, jossa on puristinosa ja kuivatusosa
US5766422A (en) * 1996-08-01 1998-06-16 Beloit Technologies, Inc. Lightweight high temperature pressing
DE19633422A1 (de) * 1996-08-20 1998-02-26 Voith Sulzer Papiermasch Gmbh Pressenpartie und Verfahren zum Entwässern einer wässrigen Faserstoffbahn

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011005747A1 (de) 2011-03-18 2012-09-20 Voith Patent Gmbh Blattbindungsvorrichtung
WO2012126875A1 (fr) 2011-03-18 2012-09-27 Voith Patent Gmbh Dispositif de mise en feuille
DE102011081239A1 (de) 2011-08-19 2013-02-21 Voith Patent Gmbh Blattbildungsvorrichtung
DE102011083367A1 (de) 2011-09-26 2013-03-28 Voith Patent Gmbh Former für eine Maschine zur Herstellung einer Faserstoffbahn aus wenigstens einer Faserstoffsuspension

Also Published As

Publication number Publication date
US6863776B2 (en) 2005-03-08
DE50208327D1 (de) 2006-11-16
US20030101881A1 (en) 2003-06-05
ATE341661T1 (de) 2006-10-15
DE10159115A1 (de) 2003-06-18
EP1316641A1 (fr) 2003-06-04

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