EP0931876B1 - Section de pressage - Google Patents

Section de pressage Download PDF

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Publication number
EP0931876B1
EP0931876B1 EP98121472A EP98121472A EP0931876B1 EP 0931876 B1 EP0931876 B1 EP 0931876B1 EP 98121472 A EP98121472 A EP 98121472A EP 98121472 A EP98121472 A EP 98121472A EP 0931876 B1 EP0931876 B1 EP 0931876B1
Authority
EP
European Patent Office
Prior art keywords
press
fibrous web
nip
last
felt
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
EP98121472A
Other languages
German (de)
English (en)
Other versions
EP0931876A3 (fr
EP0931876A2 (fr
Inventor
Karl Dr. Steiner
Albrecht Dr. Meinecke
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 EP0931876A2 publication Critical patent/EP0931876A2/fr
Publication of EP0931876A3 publication Critical patent/EP0931876A3/fr
Application granted granted Critical
Publication of EP0931876B1 publication Critical patent/EP0931876B1/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 fibrous web, in particular a paper web with at least two press nips, wherein at least the first press nip of a shoe press roll and a cylindrical one Counter roll is formed and the fibrous web after a partial Wrapping the counter roll of the first press nip as short as possible Way to the cylindrical counter roll of the last press nip.
  • Such a press section is described for example in DE 295 18 748 U1.
  • There it comprises two press nips, each from a shoe press roll are formed in combination with a smooth roller.
  • the paper web will from the wire section of the paper machine to an endless, smooth and flexible one Press belt passed that together with the paper web through the first Press nip runs and the paper web against the smooth roller of the second press nip passes.
  • the object of the invention is therefore to provide a press section, the one improved guidance of the fibrous web, especially after the last press nip guaranteed.
  • the object was achieved in that at least by the last press nip at least one arranged on both sides of the fibrous web Press felt runs and after the last press nip a press felt by means of a Suction or blowing element separated from the fibrous web and carried away becomes.
  • the use of two press felts leads to an improvement the drainage capacity in the last press nip and to a safe one Guiding the fibrous web after the last press nip on at least one Press felt along. Because of the rapid removal of a press felt Rewetting limited by this.
  • a blowing element preferably in the form of a blowing box, to be led past.
  • the fibrous web continues after the last press nip Press felt on a suction element, preferably in the form of a vacuumed roller or a suction box.
  • the press section results when the press felts pass through all press nips to run.
  • the fibrous web can go from the upstream wire section to one Press felt and from this or the other press felt to a subsequent one Unit, for example, be passed to a dryer fabric in a dryer section. Both transfer processes are usually carried out by suction or blowing devices supported.
  • the press section consists of three press nips 2 and 3, wherein the first and the last press nip 2 and 3 are extended and each of a shoe press roll 4 or 11 and a counter roll 5 or 6 be formed.
  • the second press nip is provided by the two cylindrical counter rolls 5 and 6 are shaped and generally operate with a smaller one Pressing force.
  • press felt 7, 8 take the squeezed water in the press nips 2, 3 and guide the fibrous web 1 through the press section, which makes high speeds possible.
  • An example here is the removal of the fibrous web 1 from the screen 17 of an upstream one Formers shown. The handover to the top Press felt 7 supported by a suction roll 16 wrapped by press felt 7. Then the lower press felt 8 is fed.
  • the upper press felt 7 is shown in FIGS led away as quickly as possible from the fibrous web 1, so that the rewetting guided away from the fibrous web 1 as quickly as possible by this press felt 7, so that the rewetting of this press felt 7 remains limited.
  • the lower press felt 8 over a Suction element 9 guided in the form of a vacuumed roller 9.
  • suction elements 9 also has the advantage that a part of the water from the press felts 7 and 8 already discharged into the suction elements 9 can be what the rewetting of the further press felt 7th or 8 decreased.
  • the fibrous web 1 is then from the further press felt 7 or 8 passed to a dryer 14 of a following dryer section, in which guided the fibrous web 1 over guide rolls and heated drying cylinders 15 becomes.
  • the transfer is here also wrapped by a dryer 14 suctioned roller 13 supported.
  • the vacuumed rollers consist essentially of a perforated Roller jacket inside of which a negative pressure is generated. This happens either directly via a connection to a vacuum source or indirectly via suction of the non-wrapped outside of the roll shell.
  • the shoe press rolls 4 and 11 consist of a flexible roll shell, which is guided via a pressure unit 12 with a concave pressure surface.
  • the Pressure is usually hydraulic and the lubrication between Roller jacket and contact surface on hydrostatic and / or hydrodynamic Wise.
  • the cylindrical counter roller 5 and 6 can be coated, grooved or blind drilled be executed.

Landscapes

  • Paper (AREA)
  • Nonwoven Fabrics (AREA)

Claims (8)

  1. Section de pressage pour la déshydratation d'une bande de matière fibreuse (1), en particulier d'une bande de papier, comprenant au moins deux lignes de contact (2, 3), au moins la première ligne de contact (2) étant formée par un rouleau de presse à sabot (4) et un rouleau conjugué cylindrique (5) et la bande de matière fibreuse (1) parvenant après un enveloppement partiel du rouleau conjugué (5) de la première ligne de contact (2), par le chemin le plus court possible jusqu'au rouleau conjugué également cylindrique (6) de la dernière ligne de contact (3),
    caractérisée en ce que
    à chaque fois au moins un feutre de pressage (7, 8) disposé de part et d'autre de la bande de matière fibreuse (1) s'étend au moins à travers la dernière ligne de contact (3) et après la dernière ligne de contact (3) un feutre de pressage (7, 8) est séparé de la bande de matière fibreuse (1) au moyen d'un élément d'aspiration (9) ou d'un élément de soufflage (10) et est écarté.
  2. Section de pressage selon la revendication 1,
    caractérisée en ce que
    à chaque fois au moins un feutre de pressage (7, 8) disposé de part et d'autre de la bande de matière fibreuse (1) s'étend également à travers la première ligne de contact (2).
  3. Section de pressage selon la revendication 1 ou 2,
    caractérisée en ce que
    à chaque fois au moins un feutre de pressage (7, 8) disposé de part et d'autre de la bande de matière fibreuse (1) s'étend à travers toutes les lignes de contact (2, 3).
  4. Section de pressage selon la revendication 3,
    caractérisée en ce que
    les feutres de pressage (7, 8) passent à travers toutes les lignes de contact (2, 3).
  5. Section de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que les rouleaux conjugués (5, 6) de la première (2) et de la deuxième (3) ligne de contact sont au moins légèrement pressés l'un contre l'autre.
  6. Section de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que la dernière ligne de contact (3) est formée par le rouleau conjugué cylindrique (6) et un rouleau de presse à sabot (11).
  7. Section de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que le feutre de pressage (7, 8) conduisant la bande de matière fibreuse (1) après la dernière ligne de contact (3) est passé devant un élément d'aspiration (9), de préférence sous forme d'un rouleau aspiré ou d'une caisse aspirante.
  8. Section de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que le feutre de pressage (7, 8) écarté de la bande de matière fibreuse (1) après la dernière ligne de contact (3) est passé devant un élément de soufflage (10), de préférence sous la forme d'une caisse soufflante.
EP98121472A 1998-01-21 1998-11-11 Section de pressage Expired - Lifetime EP0931876B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19802054 1998-01-21
DE19802054A DE19802054A1 (de) 1998-01-21 1998-01-21 Pressenpartie

Publications (3)

Publication Number Publication Date
EP0931876A2 EP0931876A2 (fr) 1999-07-28
EP0931876A3 EP0931876A3 (fr) 2001-01-10
EP0931876B1 true EP0931876B1 (fr) 2004-02-18

Family

ID=7855185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121472A Expired - Lifetime EP0931876B1 (fr) 1998-01-21 1998-11-11 Section de pressage

Country Status (4)

Country Link
US (2) US6325894B1 (fr)
EP (1) EP0931876B1 (fr)
CA (1) CA2259809A1 (fr)
DE (2) DE19802054A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19919051A1 (de) * 1999-04-27 2000-11-02 Voith Sulzer Papiertech Patent Die Pressenpartie
ATE332408T1 (de) 2000-03-13 2006-07-15 Voith Paper Patent Gmbh Pressanordnung
DE10012148A1 (de) * 2000-03-13 2001-09-20 Voith Paper Patent Gmbh Pressanordnung
EP1205600A1 (fr) * 2000-11-03 2002-05-15 Voith Paper Patent GmbH Presse à patin
DE202012012681U1 (de) 2012-08-21 2013-09-26 Voith Patent Gmbh Pressenpartie für eine Maschine zur Herstellung einer Faserstoffbahn
DE102016201338A1 (de) * 2016-01-29 2017-08-03 Voith Patent Gmbh Presse

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US58051A (en) * 1866-09-18 Improvement in paper-making machinery
US3268390A (en) * 1965-10-28 1966-08-23 Beloit Corp Grooved roll double-felted press for papermaking
CH528055A (it) * 1970-09-05 1972-09-15 Mara Anstalt Pressa plurima per la disidratazione di prodotti in foglio
FI770542A (fi) * 1977-02-18 1978-08-19 Valkama P J Pressparti foer avlaegsning av vatten ur fiberbana
DE3328162C2 (de) 1983-08-04 1986-02-20 J.M. Voith Gmbh, 7920 Heidenheim Papiermaschine
DE3742848C3 (de) * 1987-12-17 1996-06-13 Escher Wyss Gmbh Pressenpartie einer Papiermaschine
DE3815278A1 (de) * 1988-05-05 1989-11-16 Voith Gmbh J M Pressenpartie einer maschine zur herstellung einer faserstoffbahn, insbesondere papierbahn
US5389205A (en) 1990-11-23 1995-02-14 Valmet Paper Machinery, Inc. Method for dewatering of a paper web by pressing using an extended nip shoe pre-press zone on the forming wire
FI96789C (fi) * 1990-11-23 1996-08-26 Valmet Paper Machinery Inc Menetelmä ja laite veden poistamiseksi paperiradasta puristamalla
DE4140879A1 (de) * 1991-12-11 1993-06-17 Voith Gmbh J M Pressenpartie
DE4321399A1 (de) * 1993-06-26 1993-11-11 Voith Gmbh J M Pressenpartie einer Papiermaschine
FI112391B (fi) * 1993-12-08 2003-11-28 Metso Paper Inc Paperikoneen puristinosa, jossa käytetään pitkänippipuristinta
DE29518748U1 (de) 1995-11-28 1996-01-11 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Pressenpartie
DE19633958A1 (de) * 1996-04-03 1997-10-09 Voith Sulzer Papiermasch Gmbh Saugpreßwalze
EP0923659B1 (fr) 1996-08-22 2001-05-09 Voith Paper Patent GmbH Cylindre aspirant pour former et traiter une bande de materiau, notamment une bande de papier, de carton ou de textile
DE29621078U1 (de) * 1996-12-04 1997-02-06 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Pressenpartie
DE19801417A1 (de) * 1998-01-16 1999-07-22 Voith Sulzer Papiertech Patent Pressenpartie
DE19802853A1 (de) * 1998-01-26 1999-07-29 Voith Sulzer Papiertech Patent Pressenanordnung

Also Published As

Publication number Publication date
CA2259809A1 (fr) 1999-07-21
EP0931876A3 (fr) 2001-01-10
US6361658B2 (en) 2002-03-26
DE19802054A1 (de) 1999-07-22
DE59810792D1 (de) 2004-03-25
EP0931876A2 (fr) 1999-07-28
US6325894B1 (en) 2001-12-04
US20010009181A1 (en) 2001-07-26

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