EP0859081A2 - Appareil de pressage pour déshumidifier ou satiner une bande fibreuse - Google Patents

Appareil de pressage pour déshumidifier ou satiner une bande fibreuse Download PDF

Info

Publication number
EP0859081A2
EP0859081A2 EP98101107A EP98101107A EP0859081A2 EP 0859081 A2 EP0859081 A2 EP 0859081A2 EP 98101107 A EP98101107 A EP 98101107A EP 98101107 A EP98101107 A EP 98101107A EP 0859081 A2 EP0859081 A2 EP 0859081A2
Authority
EP
European Patent Office
Prior art keywords
press
pressing
fibrous web
zone
total
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.)
Withdrawn
Application number
EP98101107A
Other languages
German (de)
English (en)
Other versions
EP0859081A3 (fr
Inventor
Rudolf Hasenfuss
Joachim Dr. Grabscheid
Christian Schiel
Wolfgang Schuwerk
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 Sulzer Papiermaschinen GmbH
Voith Sulzer Papiertechnik 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 Sulzer Papiermaschinen GmbH, Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Publication of EP0859081A2 publication Critical patent/EP0859081A2/fr
Publication of EP0859081A3 publication Critical patent/EP0859081A3/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • 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
    • F26B13/24—Arrangements of devices using drying processes not involving heating
    • F26B13/28—Arrangements of devices using drying processes not involving heating for applying pressure; for brushing; for wiping

Definitions

  • Pressing devices of this type for producing high-quality, graphic Papers usually consist of compact presses, consisting of a 3 or 4 roller press, most of which an additional laying press is connected downstream.
  • This relatively large number of required nips due to the high operating speed to produce high quality graphic papers is required due to leads the correspondingly large number of rollers required in one high space requirement of such pressing devices.
  • relatively high effort is due to the high operating speed however, only a limited drainage capacity reached.
  • the object of the invention is to provide a pressing device at the beginning training the type mentioned with the smallest possible space requirement, which at the same time has a large drainage capacity at high operating speeds and loss of quality, for example by squeezing the paper web, avoids.
  • the entire press area comprises two press zones, the first press zone by a shoe press and the second Press zone by a roller press or another Shoe press is formed.
  • the pressing area can also include, for example, three press zones, the first press area through a shoe press and the second and third Press area each by itself on the shoe press in the running direction roller presses adjoining the fibrous web becomes.
  • additional shoe press may be provided.
  • the press area can be used to further reduce the space required include only two press zones, both through in the direction of travel the fibrous web of shoe presses one behind the other are formed. At the end of the pressing process, a final, Achieving hard drainage can be behind the two Shoe presses in the direction of the fibrous web another one Roll press can be provided.
  • the transport speed of the fibrous web in operation of the press device at least 1500 m / min, in particular at least 1800 m / min.
  • n give the number of press zones, L i the length of the i-th press zone, p mi the mean pressure acting on the fibrous web in the i-th press zone, v the speed of the fibrous web, t 1 the dwell time of a point of the fibrous web in the first press zone and p i the line force acting on the fibrous web in the i-th press zone.
  • the product of the dwell time t 1 of a point of the fibrous web in the first press zone and the sum of the line forces acting on the fibrous web in the individual press zones p i at least 2.5 kPa ⁇ s ⁇ m.
  • a lower pressure preferably acts in the first press zone on the fibrous web than in the following press zones. On this way the required gentle drainage in the first pressing zone can be advantageously achieved.
  • the pressure profile in the first pressure zone has one lower pressure gradients than in at least one of the subsequent press zones. This also makes the necessary gentle drainage in the first press zone.
  • Press device with shoe press as third press zone press zones L 1 , L 2 , L 3S ):
  • the characteristic parameter K is therefore also for these Press device below the desired value of 2.5 kPa ⁇ s ⁇ m and thus below that shown in gray in Fig. 1 Area.
  • Press device with shoe press as the first press zone press zones L 1S , L 2, L 3 ):
  • K 2.76 kPa ⁇ s ⁇ m.
  • Press device consisting of two shoe presses connected in series (press zones L 1S , L 2S ):
  • the pressure pressure curve shown corresponds essentially the pressure pressure curve as shown in Fig. 3 when the 3 forming three nips to one single nip can be summarized.
  • the pressing pressure curve 5 also shows the pressing pressure curve 5 of a pressing device in which the two pressing zones of the lengths L 1 and L 2 are formed by a long wide nip press, the length L 1 being characterized by the turning point of the pressing pressure curve 5. While in the first press zone of the press area there is a relatively gentle increase in the press pressure along the press pressure curve 5 ', the press pressure in the second press zone along the press pressure curve 5''increases significantly more steeply. As a result, gentle dewatering is achieved on the one hand at the beginning of the pressing process, the residual moisture being pressed out of the fibrous web at the end of the pressing process by the increased pressing pressure and the increased gradient of the pressing pressure profile. Since there is only one nip, there is no blind compaction work between different nips, but only a structural compaction up to the pressure, at which a drainage starts again. There is practically no rewetting between the two press zones.
  • the pressing pressure curve 6 shown in FIG. 6 differs from the pressing pressure curve shown in FIG. 5 in that the increase in the pressing pressure within the first pressing zone is steeper than in FIG. 5.
  • the length L 1 of the first pressing zone is in turn due to the turning point of the Given pressure pressure course. At the end of the pressing process, the pressing pressure abruptly decreases within the second pressing zone.
  • the characteristic of this press is also characteristic Parameter K over 2.5 kPa ⁇ s ⁇ m, so that high-quality, graphic papers are treated at high speeds can.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Paper (AREA)
  • Drying Of Solid Materials (AREA)
EP98101107A 1997-02-12 1998-01-23 Appareil de pressage pour déshumidifier ou satiner une bande fibreuse Withdrawn EP0859081A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19705360 1997-02-12
DE19705360A DE19705360A1 (de) 1997-02-12 1997-02-12 Preßvorrichtung zum Entwässern oder Glätten einer Faserstoffbahn

Publications (2)

Publication Number Publication Date
EP0859081A2 true EP0859081A2 (fr) 1998-08-19
EP0859081A3 EP0859081A3 (fr) 1999-08-18

Family

ID=7820031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98101107A Withdrawn EP0859081A3 (fr) 1997-02-12 1998-01-23 Appareil de pressage pour déshumidifier ou satiner une bande fibreuse

Country Status (4)

Country Link
US (1) US6197157B1 (fr)
EP (1) EP0859081A3 (fr)
JP (1) JPH10227562A (fr)
DE (1) DE19705360A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0852273A2 (fr) * 1996-12-05 1998-07-08 Voith Sulzer Papiermaschinen GmbH Presse de déshydratation
WO2006117261A1 (fr) * 2005-04-30 2006-11-09 Voith Patent Gmbh Presse a long interstice de pression
WO2006117260A1 (fr) * 2005-04-30 2006-11-09 Voith Patent Gmbh Presse à fente longitudinale
WO2006117262A1 (fr) * 2005-04-30 2006-11-09 Voith Patent Gmbh Presse a long interstice de pression

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008000597A1 (de) * 2008-03-11 2009-09-17 Voith Patent Gmbh Maschine zur Herstellung und/oder Behandlung einer Faserstoffbahn
SE539535C2 (sv) * 2013-11-07 2017-10-10 Stora Enso Oyj Förfarande för avvattning av en suspension innefattande mikrofibrillerad cellulosa

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3515576A1 (de) * 1984-05-25 1985-11-28 Valmet Oy, Helsinki Papiermaschinenpressenpartie mit separaten pressstellen
EP0487483A1 (fr) * 1990-11-23 1992-05-27 Valmet Paper Machinery Inc. Procédure et disposition pour drainage d'une bande de papier par pressage
EP0549553A1 (fr) * 1991-12-23 1993-06-30 Valmet Corporation Section de presse d'une machine à papier, en particulier pour papier à imprimer

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
US5167768A (en) * 1991-11-07 1992-12-01 Beloit Corporation Wide nip web press and method using a press shoe with two pivots
US5639351A (en) 1991-12-23 1997-06-17 Valmet Corporation Press section of a paper machine, in particular for printing paper qualities
DE4301750C2 (de) * 1993-01-23 1996-10-10 Voith Gmbh J M Verfahren und Vorrichtung zum Entwässern einer Bahn mittels Pressen
FI112391B (fi) * 1993-12-08 2003-11-28 Metso Paper Inc Paperikoneen puristinosa, jossa käytetään pitkänippipuristinta
US5441604A (en) * 1994-02-17 1995-08-15 Beloit Technologies, Inc. Extended nip press apparatus
DE4410129A1 (de) * 1994-03-24 1995-09-28 Kleinewefers Gmbh Preßvorrichtung für bahnförmiges Material
FI114227B (fi) * 1995-04-24 2004-09-15 Metso Paper Inc Paperikone, jossa on puristinosa ja kuivatusosa

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3515576A1 (de) * 1984-05-25 1985-11-28 Valmet Oy, Helsinki Papiermaschinenpressenpartie mit separaten pressstellen
EP0487483A1 (fr) * 1990-11-23 1992-05-27 Valmet Paper Machinery Inc. Procédure et disposition pour drainage d'une bande de papier par pressage
EP0549553A1 (fr) * 1991-12-23 1993-06-30 Valmet Corporation Section de presse d'une machine à papier, en particulier pour papier à imprimer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0852273A2 (fr) * 1996-12-05 1998-07-08 Voith Sulzer Papiermaschinen GmbH Presse de déshydratation
EP0852273A3 (fr) * 1996-12-05 1999-05-26 Voith Sulzer Papiertechnik Patent GmbH Presse de déshydratation
US6228221B1 (en) 1996-12-05 2001-05-08 Voith Sulzer Papiermaschinen Gmbh Dewatering press and process
WO2006117261A1 (fr) * 2005-04-30 2006-11-09 Voith Patent Gmbh Presse a long interstice de pression
WO2006117260A1 (fr) * 2005-04-30 2006-11-09 Voith Patent Gmbh Presse à fente longitudinale
WO2006117262A1 (fr) * 2005-04-30 2006-11-09 Voith Patent Gmbh Presse a long interstice de pression

Also Published As

Publication number Publication date
US6197157B1 (en) 2001-03-06
EP0859081A3 (fr) 1999-08-18
DE19705360A1 (de) 1998-08-13
JPH10227562A (ja) 1998-08-25

Similar Documents

Publication Publication Date Title
EP0854228B1 (fr) Section de pressage
DE68923415T2 (de) Verfahren und Vorrichtung zur Herstellung einer Papierbahn.
EP1314817A1 (fr) Procédé et machine pour fabriquer une bande fibreuse
DE2420029C3 (de) Preßeinrichtung zum kontinuierlichen Herstellen von Spanplatten, Faserplatten o.dgl
DE3201635C2 (de) Kalanderanordnung
EP0848106B1 (fr) Section de pressage
DE2739095A1 (de) Pressenpartie zur wasserentziehung aus einer faserbahn
DE2543043A1 (de) Pressenteil einer papiermaschine
EP0598991A1 (fr) Section de presse pour une machine à papier
EP0854232B1 (fr) Machine pour la fabrication d'une bande fibreuse
EP0859081A2 (fr) Appareil de pressage pour déshumidifier ou satiner une bande fibreuse
EP0857818B1 (fr) Machine pour la fabrication d'une bande fibreuse
EP1111126B1 (fr) Section de presse
DE4344165A1 (de) Verfahren zum Glätten einer Faserstoffbahn in einem verlängerten Glättspalt und Vorrichtung zur Durchführung des Verfahrens
EP0852273B1 (fr) Presse de déshydratation
EP0870866B1 (fr) Appareil et procédé pour la déshumidification d'une bande
EP0803604B1 (fr) Presse humide
DE19708966A1 (de) Pressenanordnung
DE19801417A1 (de) Pressenpartie
DE19705030A1 (de) Vorrichtung und Verfahren zur Entwässerung einer Materialbahn
DE4435897C1 (de) Supportverbindungen
DE19645408B4 (de) Verfahren zur Herstellung einer Faserstoffbahn
DE1461074C3 (de) Nasspresse für Papiermaschinen
DE7409841U (de) Vorrichtung zum entwaessern von suspensionen
EP0985764A2 (fr) Dispositif de pressage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FI SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VOITH SULZER PAPIERTECHNIK PATENT GMBH

17P Request for examination filed

Effective date: 20000218

AKX Designation fees paid

Free format text: DE FI SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VOITH PAPER PATENT GMBH

17Q First examination report despatched

Effective date: 20011031

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20030707