EP0930392B1 - Section de pressage - Google Patents

Section de pressage Download PDF

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Publication number
EP0930392B1
EP0930392B1 EP98121011A EP98121011A EP0930392B1 EP 0930392 B1 EP0930392 B1 EP 0930392B1 EP 98121011 A EP98121011 A EP 98121011A EP 98121011 A EP98121011 A EP 98121011A EP 0930392 B1 EP0930392 B1 EP 0930392B1
Authority
EP
European Patent Office
Prior art keywords
press
fibrous web
web
roll
dewatering 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
EP98121011A
Other languages
German (de)
English (en)
Other versions
EP0930392A2 (fr
EP0930392A3 (fr
Inventor
Wolfgang 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 EP0930392A2 publication Critical patent/EP0930392A2/fr
Publication of EP0930392A3 publication Critical patent/EP0930392A3/fr
Application granted granted Critical
Publication of EP0930392B1 publication Critical patent/EP0930392B1/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 of a machine for producing a Fiber web, in particular a paper and / or board web with at least two consecutive, double-felted presses accordingly the preamble of claim 1.
  • the object of the invention is therefore a simply constructed press section with improved dewatering in the first or upstream press nip create.
  • the shoe press rolls are generally of a flexible press cover formed, which runs over a pressing member with concave pressing surface. This allows the formation of an extended press nip with a cylindrical Counter roll, so that the fibrous web in the nip over a longer distance exposed to the pressing pressure and thus dehydrated internsiver. In addition, sets the pressure in the press nip no longer abruptly, this can rather of a low value, for example, continuously brought to a higher value become.
  • the arranged on both sides of the fibrous web dewatering felts provide not only for a sufficient capacity to accommodate the squeezed out Water but also for the uniformity of the fibrous web. Furthermore, By the use of an evacuated roll at the upstream or first nip the capacity for the squeezed out water essential increased.
  • the fibrous web starting from the takeover from an upstream to the Transfer to a following unit at least from a band, sieve, felt o. ⁇ . is supported. This leads to a secure web guide and thereby reduces the frequency of web breaks.
  • the dewatering performance of the press section can also be essential be improved if the following in the web running direction, double felted Press nip at least of a deflection-controlled roller preferably is formed in the form of a shoe roll. This allows the press section to limit to two press nips, which significantly reduces the effort.
  • the leadership of the fibrous web can in each case a dewatering felt be taken over the press column. It is particularly advantageous in this Fall, when a dewatering felt of the first press the fibrous web of the upstream wire section and on the other side of the fibrous web arranged dewatering felt the following press the fibrous web from the dewatering felt of the first press and to the following Drying section passes
  • the figure shows a schematic representation the press section with two press nips 5 and 9. It is about the rollers each press nip 5 and 9 each an endless dewatering felt 11, 12 out, which serves to receive the squeezed out water. Besides, both own Presses 2 and 3 each a deflection-controlled shoe roll 6 and 10. While the press nip 5 of the upstream in the running direction 4 press 2 with a cylindrical suctioned roller 15 is formed, this is done in the following Press 3 with a cylindrical smooth roller 16.
  • the deflection-controlled shoe rollers 6 and 10 provide for a adjustable, preferably uniform drainage profile axially along each press nip 5 and 9.
  • a dewatering felts 11, 12 in each press nip 5 and 9 is a sufficiently large capacity given for receiving the squeezed out water.
  • the Fibrous web 1 each of a dewatering felt 11, 12 supported by the Press section are performed.
  • the evacuated roll 15 has a perforated roll shell whose interior connected to a vacuum source.
  • the negative pressure does not only provide for a safe guidance of the fibrous web 1 after leaving the first Press nip 5 on the dewatering felt 11 but also for a reduced Remoistening of the fibrous web 1 by the dewatering felt 11th
  • the fibrous web 1 directly removed from the sieve 13 of an upstream unit 7. , This is done with the aid of an evacuated guide roll, the dewatering felt 11th the evacuated roller 15 of the first press 2 is looped. After the first Pressing gap 9 is in turn supported by an evacuated guide roll Fiber web 1 at the arranged on the other side of the fibrous web 1 Dewatering felt 12 passed. This smooth roller 16 revolving Dewatering felt 12 transfers the fibrous web 1 in turn from one The suctioned guide roll supports a drying wire 14 of the following unit 8. This unit 8 is designed here as a dryer section, in which the fibrous web 1 together with the drying wire 14 alternately over drying cylinder and Guide rollers is guided.

Landscapes

  • Paper (AREA)

Claims (3)

  1. Section de pressage d'une machine de fabrication d'une nappe fibreuse (1), notamment d'une nappe de papier et/ou de carton, comprenant deux presses à double feutre (2;3) successives, la fente de presse (5) de la presse (2) montée en amont dans le sens d'avance de la nappe (4) étant formée par un rouleau à sabot (6) commandé en flexion et par un rouleau aspiré (15) et la nappe fibreuse (1) parcourant la section de pressage de manière supportée par au moins un feutre d'égouttage (11; 12), caractérisée en ce qu'un feutre d'égouttage (11) de la première presse reprend la nappe fibreuse (1) depuis la section de toile montée en amont et le feutre d'égouttage (12) de la presse suivante (3), disposé de l'autre côté de la nappe fibreuse (1), reprend la nappe fibreuse (1) depuis le feutre d'égouttage (11) de la première presse (2) et la transfère à la section de séchage suivante, le feutre d'égouttage (11) de la première presse (2), guidant la nappe fibreuse (1), passant autour du rouleau aspiré (15).
  2. Section de pressage selon la revendication 1, caractérisée en ce que la nappe fibreuse (1) est supportée, depuis sa reprise par une unité montée en amont (7) jusqu'à son transfert à une unité suivante (8), par au moins une bande, une toile, un feutre ou autre.
  3. Section de pressage selon l'une quelconque des revendications précédentes, caractérisée en ce que la fente de presse (9) à double feutre suivante dans le sens d'avance de la nappe (4) est formée au moins par un rouleau commandé en flexion, de préférence sous forme d'un rouleau à sabot (10).
EP98121011A 1998-01-20 1998-11-05 Section de pressage Expired - Lifetime EP0930392B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19801891A DE19801891A1 (de) 1998-01-20 1998-01-20 Pressenpartie
DE19801891 1998-01-20

Publications (3)

Publication Number Publication Date
EP0930392A2 EP0930392A2 (fr) 1999-07-21
EP0930392A3 EP0930392A3 (fr) 2001-01-10
EP0930392B1 true EP0930392B1 (fr) 2005-02-02

Family

ID=7855089

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121011A Expired - Lifetime EP0930392B1 (fr) 1998-01-20 1998-11-05 Section de pressage

Country Status (4)

Country Link
US (1) US6589390B1 (fr)
EP (1) EP0930392B1 (fr)
CA (1) CA2260115A1 (fr)
DE (2) DE19801891A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE511667C2 (sv) † 1998-03-16 1999-11-08 Valmet Karlstad Ab Pappersmaskin och sätt för framställning av en pappersbana
DE10022605A1 (de) * 2000-05-09 2001-11-15 Voith Paper Patent Gmbh Pressenpartie
DE10234959A1 (de) * 2002-07-31 2004-02-19 Voith Paper Patent Gmbh Pressenanordnung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5868904A (en) * 1993-12-08 1999-02-09 Valmet Corporation Press section employing an extended nip press with suction counter roll
FI114227B (fi) * 1995-04-24 2004-09-15 Metso Paper Inc Paperikone, jossa on puristinosa ja kuivatusosa
FI98843C (fi) * 1995-10-03 1997-08-25 Valmet Corp Menetelmä ja laite veden poistamiseksi paperi- tai kartonkiradasta puristamalla
DE19607868A1 (de) * 1996-03-01 1997-09-04 Voith Sulzer Papiermasch Gmbh Pressenpartie einer Papiermaschine und Verfahren zum Entwässern einer Papierbahn
DE29701382U1 (de) 1997-01-28 1997-03-20 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Pressenpartie einer Papiermaschine
DE19708967A1 (de) * 1997-03-05 1998-09-10 Voith Sulzer Papiermasch Gmbh Pressenpartie

Also Published As

Publication number Publication date
EP0930392A2 (fr) 1999-07-21
DE59812539D1 (de) 2005-03-10
US6589390B1 (en) 2003-07-08
CA2260115A1 (fr) 1999-07-20
DE19801891A1 (de) 1999-07-22
EP0930392A3 (fr) 2001-01-10

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