EP0854230A2 - Press humide - Google Patents

Press humide Download PDF

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Publication number
EP0854230A2
EP0854230A2 EP97119411A EP97119411A EP0854230A2 EP 0854230 A2 EP0854230 A2 EP 0854230A2 EP 97119411 A EP97119411 A EP 97119411A EP 97119411 A EP97119411 A EP 97119411A EP 0854230 A2 EP0854230 A2 EP 0854230A2
Authority
EP
European Patent Office
Prior art keywords
press
web
belt
nip
section according
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
EP97119411A
Other languages
German (de)
English (en)
Other versions
EP0854230B1 (fr
EP0854230A3 (fr
Inventor
Gerhard Kotitschke
Wolfgang Mayer
Klaus Esslinger
Andreas Meschenmoser
Günther Morhardt
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 EP0854230A2 publication Critical patent/EP0854230A2/fr
Publication of EP0854230A3 publication Critical patent/EP0854230A3/fr
Application granted granted Critical
Publication of EP0854230B1 publication Critical patent/EP0854230B1/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 wet end of a machine for manufacturing a fibrous web, in particular paper and / or Cardboard web, with at least one press that has a press nip by which the preformed in a web formation zone Fiber web is passed through.
  • the wet fibrous web is further dewatered in the Connection to the forming area, after that for the fibers certain degree of immobility has been reached, mostly by essentially absorbent elements such as foils, register rollers in particular, Suction boxes, suction rolls and / or the like.
  • This type of drainage involves a great deal of effort connected, in particular taking up a lot of space and i.a. excessively expensive energy used to generate vacuum becomes. Since the drainage screen is also above the mostly fixed Drainage elements grows depending on Type of fabric has a relatively short sieve life.
  • the entry type is the function of a press in the Screen area of the former integrated around a web take-off point save.
  • the press point provided in the screen area becomes formed by a suction roll and an open roll.
  • Press nip is either very hard, i.e. with a high line force, or very short and soft, what on a low line force is due.
  • Neither one the other mode of operation is also suitable for the fibrous web at low dryness, i.e. when still wet Fibrous web, the amount of water required if possible to withdraw from a small pressure gradient.
  • the aim of the invention is a wet end of the aforementioned Art to create that with minimal effort and little Space requirements and with minimal energy consumption and accordingly low operating costs the best possible Drainage of the pre-formed, still wet fibrous web guaranteed.
  • the object is achieved according to the invention in that at least one press a long gap press and the one in question Press nip an extended press nip in the web running direction is and that the press nip is provided in one area is in which the dry content of those entering the gap preformed fibrous web less than or equal to 15% and is preferably less than or equal to 12%.
  • the solution according to the invention is i.a. on gap formers, hybrid formers, Fourdrinier sieves, multiple long sieves and / or the like can be used.
  • the press nip length can depend on the respective product type be adjusted. After the press point in question closer to Headbox, the fibrous web is warmer when pressed, which further increases the drainage capacity. In addition, there is less screen wear overall. The energy costs are significantly reduced.
  • the squeeze takes place in an extremely gentle manner, with the pressure profile through appropriate shoe design (e.g. length, Form) can be specified. After all, it is also extremely volume-saving Pressing guaranteed.
  • the fibrous web preformed in the web formation zone can the press nip also by a fibrous web in front of the press nip adopting water-absorbing belt.
  • This can be, for example, a felt, sieve and / or act perforated tape.
  • a band is passed through the press nip and that the tape structure obtained symmetrical with respect to the fibrous web is.
  • the support band is preferably a felt and / or Screen belt.
  • each of the fibrous web consists of a fine fabric Tape, a porous, coarse tape and a waterproof one To provide tape.
  • the band made of fine fabric it can be a sieve belt, for example.
  • This can be based on the fibrous web a web of felt and a waterproof one Belt and on the other side of the web a sieve belt, a porous, coarse tape and a waterproof tape provided be.
  • the in Web running direction extended press nip between a rotating via at least one press shoe guided flexible Press belt and an opposing press surface formed can thus in particular by a Shoe press be formed.
  • Press nip is preferably a press shoe with a at least essentially flat pressing surface on the jacket side intended.
  • the through the press nip running fabric mechanically less stressed on bending, so that they are thicker and absorb more water accordingly can.
  • the wet end preferably comprises a headbox additionally fed with dilution water.
  • the wet end is provided in combination with at least one further extended-nip press and a transfer zone for a transfer of the fibrous web into a drying section, the fibrous web preferably being guided in such a way that overall a closed web guide results.
  • the first press nip can have at least one further press nip follow, which is an elongated nip or a nip can act.
  • To form the press nip extended in the direction of web travel can also be a press belt guided over at least one press shoe be provided, at least outside the shoe area is essentially circular cylindrical and thus takes a roll shape.
  • Figure 1 shows a purely schematic side view of an embodiment a wet section of a manufacturing machine a fibrous web 10, in particular paper and / or cardboard web.
  • the wet end comprises an extended nip press 20 with an in Web running direction L extended nip between two Shoe press rolls 22, 24 is formed.
  • a belt 26 or 28 performed, which is for example a Screen and / or felt belt can act.
  • the press nip formed by the long nip press 20 is in an area is provided in which the dry content of the in the Gap incoming pre-formed fibrous web 10 smaller or equal to 15% and preferably less than or equal to 12% is.
  • the two shoe press rolls 22 and 24 each include one via a press shoe 30 guided flexible press belt 32 is the area between press shoe 30 and flexible press belt 32 each lubricated with water. They also have Press shoes 30 each in the present case at least in essentially flat pressing surface on the jacket side.
  • the wet end is in combination with two other presses 34, 36, of which one, namely the press 34, one Long nip press, and a transfer zone 38 for one Transfer of the fibrous web 10 into the dryer section is provided.
  • the fibrous web 10 is guided so that overall results in a closed web guide.
  • the two other presses 34, 36 are in the present Case with a central deflection compensation roller 40 with smooth, i.e. a closed surface having a roller jacket and on the one hand another shoe press roll 42 and on the other hand, a further press roller 44 is formed.
  • the central one smooth deflection compensation roller 40 takes over the fibrous web 10 directly from the lower sieve 12.
  • Figure 2 shows a schematic side view of another Embodiment of a wet end, which also with a Web running direction is extended press nip.
  • extended press nip in this case is between one Shoe press roll 46 and a suction roll 48 are formed.
  • the corresponding obtained long nip press 50 is in turn in one Area provided in which the dry content of the in the gap incoming pre-formed fibrous web less than or equal to 15% and preferably less than or equal to 12%.
  • Figure 2 can be seen is through the gap Long nip press 50 in turn only the lower wire 12 of the two sieves 12, 14 assigned to the path formation zone (cf. FIG. 1) guided.
  • the web formation zone in the area of the forming roller is in the same way as in the embodiment of FIG. 1 built up.
  • FIG 3 is another in a schematic side view Embodiment of a wet end with one in the direction of web travel elongated press nip shown.
  • the is extended Press nip between a forming roller 56 and one Shoe press roll 22 is formed, around which in turn a belt 26 is guided is.
  • the forming roll 56 is one of the web formation zones assigned lower sieve 12 out. It is by the Headbox 16 between the lower screen 12 and the forming roller 56 formed inlet-side gap at least one Fiber suspension stream fed so that the fibrous web generated between the lower wire 12 and the forming roller 56 becomes.
  • the fibrous web is finally taken over by a felt 60 guided around a suction roller 58, to then be fed to further press nips, the again be formed by at least one extended-nip press can.
  • the first long gap press 62 comprising the shoe press 22 in the present case is thus in the area of the forming roller 56 provided, the relevant extended nip between this forming roller 56 and the shoe press roller 22 are formed is.
  • the extended nip press is again arranged in an area in which the dry content of the in the pre-formed fibrous web entering the relevant gap less than or equal to 15% and preferably less than or is equal to 12%.
  • Figure 4 shows a schematic side view of another Embodiment of a wet press with an additional dilution water fed headbox 16.
  • the forming roller 18 lies in the loop of the upper sieve 14, while the lower sieve 12 over this of the screen 14 wrapped forming roller 18 is guided.
  • the screen 12 is one Suction roller 64 guided to the preformed fibrous web 10 the first, formed by the long nip press 20 to supply extended press nip.
  • this embodiment according to FIG. 4 essentially has the same structure as that shown in Figure 1 Wet beardie.
  • the bottom is Sieve 12 of the two sieves assigned to the web formation zone 12, 14 passed through the first extended press nip.
  • the relevant press nip extended in the direction of web travel again provided in an area where the dryness the preformed fibrous web entering the gap less than or equal to 15% and preferably less or is equal to 12%.
  • Figure 5 shows a further embodiment with a separate Shoe press 66 before acceptance in the press section.

Landscapes

  • Paper (AREA)
EP97119411A 1996-12-23 1997-11-06 Press humide Expired - Lifetime EP0854230B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19654200A DE19654200A1 (de) 1996-12-23 1996-12-23 Naßpresse
DE19654200 1996-12-23

Publications (3)

Publication Number Publication Date
EP0854230A2 true EP0854230A2 (fr) 1998-07-22
EP0854230A3 EP0854230A3 (fr) 1999-05-26
EP0854230B1 EP0854230B1 (fr) 2003-02-19

Family

ID=7816128

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97119411A Expired - Lifetime EP0854230B1 (fr) 1996-12-23 1997-11-06 Press humide

Country Status (3)

Country Link
US (1) US6221214B1 (fr)
EP (1) EP0854230B1 (fr)
DE (2) DE19654200A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002020258A1 (fr) * 2000-09-04 2002-03-14 Valmet-Karlstad Aktiebolag Procede et appareil de production d'un carton a motifs

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19805593A1 (de) * 1998-02-12 1999-08-19 Voith Sulzer Papiertech Patent Eindicker
US6790315B2 (en) * 1999-06-17 2004-09-14 Metso Paper Karlstad Ab Drying section and method for drying a paper web
US6398909B1 (en) * 1999-06-17 2002-06-04 Valmet-Karlstad Aktiebolag Method and apparatus for imprinting, drying, and reeling a fibrous web
SE516663C2 (sv) * 1999-06-17 2002-02-12 Metso Paper Karlstad Ab Torkparti i en maskin för tillverkning av en kontinuerlig tissuepappersbana samt metod för torkning av en kontinuerlig
FI115307B (fi) * 2000-11-06 2005-04-15 Metso Paper Inc Esipuristimella varustettu kartonkikoneen puristinosa
EP1304413A3 (fr) * 2001-10-18 2004-05-12 Voith Paper Patent GmbH Section de séchage et un appareil de lissage pour la section de séchage
AT508331B1 (de) * 2009-05-19 2011-05-15 Andritz Ag Maschf Verfahren und vorrichtung zur behandlung einer faserstoffbahn in einer langnip-presseinheit
SE1651555A1 (en) * 2016-11-28 2018-02-13 Valmet Oy A forming section for forming a fibrous web, a papermaking machine comprising a forming section and a method of forming a fibrous web
WO2019043608A1 (fr) * 2017-09-01 2019-03-07 Stora Enso Oyj Procédé de production de carton, carton, et carton ondulé

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0100895A2 (fr) * 1982-07-13 1984-02-22 A. Ahlström Osakeyhtiö Presse à pinçage prolongé
DE4224730C1 (en) * 1992-07-27 1993-09-02 J.M. Voith Gmbh, 89522 Heidenheim, De Tissue paper mfg. machine preventing moisture return - comprises shoe press for press unit(s) for drying tissue web, for min. press units
EP0657579A1 (fr) * 1993-12-08 1995-06-14 Valmet Paper Machinery Inc. Section de pressage d'une machine à papier utilisant une presse à zone de pressage prolongée
WO1995033885A1 (fr) * 1994-06-03 1995-12-14 Valmet Paper Machinery Inc. Pre-presse pour une bande de papier

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT44784B (de) 1908-12-14 1910-11-10 Dominik Kopp Ventil mit Federbelastung.
ZA81676B (en) * 1980-03-07 1982-08-25 Albany Int Corp Dewatering press
FI812060L (fi) * 1980-07-02 1982-01-03 Black Clawson Int Foerfarande och anordning foer framstaellning av papper och kartong
FR2574829B1 (fr) * 1984-12-17 1987-01-09 Du Pin Cellulose Procede et dispositif pour l'elimination du liquide d'une couche obtenue notamment par un procede papetier
US4879001A (en) 1988-09-12 1989-11-07 Beloit Corporation Twin wire former with roll press followed by extended nip press
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
FI98844C (fi) * 1991-12-23 1997-08-25 Valmet Paper Machinery Inc Paperikoneen puristinosa, etenkin painopaperilaaduille
FI93237C (fi) * 1993-06-11 1995-03-10 Valmet Tampella Inc Menetelmä ja laite paperi- tai kartonkikoneessa veden poistamiseksi rainasta
US5868904A (en) 1993-12-08 1999-02-09 Valmet Corporation Press section employing an extended nip press with suction counter roll
DE4423694C2 (de) * 1994-07-06 2000-03-16 Voith Sulzer Papiermasch Gmbh Langspaltpresse
FI98843C (fi) * 1995-10-03 1997-08-25 Valmet Corp Menetelmä ja laite veden poistamiseksi paperi- tai kartonkiradasta puristamalla
US5709778A (en) * 1996-10-30 1998-01-20 Voith Sulzer Paper Technology North America, Inc. Multiple shoe press for a paper making machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0100895A2 (fr) * 1982-07-13 1984-02-22 A. Ahlström Osakeyhtiö Presse à pinçage prolongé
DE4224730C1 (en) * 1992-07-27 1993-09-02 J.M. Voith Gmbh, 89522 Heidenheim, De Tissue paper mfg. machine preventing moisture return - comprises shoe press for press unit(s) for drying tissue web, for min. press units
EP0657579A1 (fr) * 1993-12-08 1995-06-14 Valmet Paper Machinery Inc. Section de pressage d'une machine à papier utilisant une presse à zone de pressage prolongée
WO1995033885A1 (fr) * 1994-06-03 1995-12-14 Valmet Paper Machinery Inc. Pre-presse pour une bande de papier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002020258A1 (fr) * 2000-09-04 2002-03-14 Valmet-Karlstad Aktiebolag Procede et appareil de production d'un carton a motifs

Also Published As

Publication number Publication date
EP0854230B1 (fr) 2003-02-19
EP0854230A3 (fr) 1999-05-26
US6221214B1 (en) 2001-04-24
DE19654200A1 (de) 1998-06-25
DE59709348D1 (de) 2003-03-27

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