EP0802281A1 - Procédé et appareil pour rendre latéralement étanche la zone de déshydratation d'un machine à papier à deux toiles - Google Patents

Procédé et appareil pour rendre latéralement étanche la zone de déshydratation d'un machine à papier à deux toiles Download PDF

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Publication number
EP0802281A1
EP0802281A1 EP97106037A EP97106037A EP0802281A1 EP 0802281 A1 EP0802281 A1 EP 0802281A1 EP 97106037 A EP97106037 A EP 97106037A EP 97106037 A EP97106037 A EP 97106037A EP 0802281 A1 EP0802281 A1 EP 0802281A1
Authority
EP
European Patent Office
Prior art keywords
sealing
sieve
sealing filler
gap
filler
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Withdrawn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
EP97106037A
Other languages
German (de)
English (en)
Inventor
Jürgen BANNING
Christian Schiel
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
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 filed Critical Voith Sulzer Papiermaschinen GmbH
Publication of EP0802281A1 publication Critical patent/EP0802281A1/fr
Withdrawn legal-status Critical Current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
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/30—Protecting wire-cloths from mechanical damage

Definitions

  • the invention relates to a method for the lateral sealing of a drainage wedge in the wire section of a twin-wire paper or cardboard machine according to the preamble of claim 1 and a device according to the preamble of claim 2.
  • Twin-screen paper or cardboard machines have become known in large numbers and great variety.
  • the two main types are the so-called gap former and the hybrid former.
  • a wedge-shaped inlet gap is formed between two sieves to enclose the machine-wide stock suspension jet coming from the headbox.
  • the suspension comes into contact with the sieves almost simultaneously.
  • the beginning of the inlet gap is at the breast rollers deflecting the screens. These roller axis centers are - seen in the running direction of the screen - more or less opposite to each other.
  • the material jet is first applied to the lower of the two screens, a certain distance is taken from it, in which the material suspension undergoes pre-dewatering, and only then is the other screen brought up to the partially pre-dewatered material suspension, around the paper web that is now being created sandwiched.
  • the pre-dewatering section can be relatively short, so that the transition between the gap former and the hybrid former is fluid.
  • a critical point of such formers is the beginning of the drainage section. This is because the stock suspension can escape between the edges of the two screens, unless other measures are taken. This leakage of the suspension leads to the loss of fiber material when the sheet is formed on or between the sieves and may impair. the sheet thickness and the fiber orientation in the edge area of the sheet, so that then relatively wide edge strips of the paper are of less good quality than the rest of the paper. Lateral seals from fixed boundary surfaces have the disadvantage that substantial wear would occur between them and the two screens.
  • the invention has for its object to provide a lateral seal of the wedge gap between two screens of a twin-wire paper machine especially for the area of application for the production of heavy paper types - i.e. with relatively thick fabric suspension layers - in such a way that there is as little material leakage between the two screens as possible Wear comes.
  • a sealing filler lies on the lower sieve.
  • the upper strainer is in contact with the upper fixed drainage strips due to its pre-tension.
  • the sealing filler has a defined distance from these upper drainage strips or from the fillers between the upper drainage strips. This distance is greater than the thickness of the top sieve.
  • the gap that forms between the upper sieve and the sealing filler is preferably acted upon with sealing water during operation, so that the fiber suspension cannot flow into this gap.
  • the contact surface between the sealing filler and the lower sieve is hydrodynamically lubricated with water in the sieve mesh.
  • At least one lower drainage strip can be pressed against the lower sieve by means of a pressure hose, whereby it performs a vertical stroke and the sieve is also moved, it is necessary for the sealing filler piece to be flexible and to nestle against the lower sieve.
  • the elasticity of the sealing filler vertically to its longitudinal extent can be achieved in two different ways.
  • the use of a soft material fulfills the flexibility of the sealing filler.
  • the construction of the sealing filler from individual lamellae also from a rigid material enables this flexibility.
  • the sealing filler - either in one piece or made up of lamellae - then only needs a fixation at its thicker end to avoid entrainment in the direction of the wire.
  • the two screens can be placed at a defined distance from each other. In other words, this means that the drainage gap varies. So that the sealing filler can be used for the different gap settings, it must be adjustable in and against the direction of wire travel.
  • FIG. 1 shows a partial section through a twin wire former transverse to the direction of web travel.
  • Figure 2 is a longitudinal section through a twin wire former.
  • Figure 1 shows a section of an edge zone of a twin wire former.
  • the sealing filler 1 shown here consists of stacked lamellae 2 extending in the direction of wire travel. The lowest lamella is the longest. The ones above are increasingly shorter. All lamellae 2 are held at their end near the headbox 12 by a fastening, not shown.
  • a gasket filler 1 bears against the lateral support wall 5 due to the drainage pressure between the sieves S1, S2.
  • the lower sieve S 1 lies on the lower drainage strips 3.
  • the lower drainage strips 3 are pressed against the sieve S 1 by a pressure hose 4.
  • the upper sieve S 2 lies against the upper fixed drainage strips 6.
  • the space between the upper drainage strips 6 is closed in the edge area with filler pieces 8. These filler pieces 8 can be so-called format slides.
  • the outer edge of the sealing filler 1 facing the stock suspension 17 is essentially flush with the inner end edge of the filler 8.
  • the sealing water flows through the gap 11 between the upper sieve S 2 and the sealing filler 1 in the direction of the material suspension 17 via the sealing water connection 10 and a prechamber 9.
  • the amount of sealing water is dimensioned such that fiber content does not penetrate into the gap 11.
  • the upper sieve S 2 is fed to the stock suspension 17 via the upper breast roller 14.
  • the drainage elements 3, 6 are arranged so that a long drainage gap is formed between the sieves S 1, S 2.
  • This former shown is a so-called hybrid former, since the stock suspension 17 coming from the headbox 12 is deposited on the lower sieve S 1 without the upper sieve S 2 initially having contact with the stock suspension 17.
  • the sealing filler according to the invention can be used for both types of mold. Is production-related - z. B. when changing the type of paper - the distance between the sieves S 1, S 2 changed, so it could either pinch the seal filler or too large a gap between the upper sieve S 1 and seal filler 1. For this reason, the sealing filler 1 has an adjustment path 15.
  • FIG. 3 shows further variants of sealing a drainage gap in a twin-wire former.
  • the lower sieve S1 has been made water-impermeable in the edge region R by synthetic resin, a glued-on film or similar measures.
  • the lower sieve S1 is guided by the sieve run regulator in such a way that the water-permeable part W of the sieve runs essentially symmetrically between the inner edges of the filler pieces 8 facing the suspension 17.
  • the width of the water-permeable area of the lower sieve S1 corresponds essentially to the dimension F, which corresponds to the distance between the inner edges of the filler pieces 8 from the driver and drive side. It is also conceivable that the dimension W is up to 25 mm smaller than the dimension F.
  • Another configuration is the additional lubrication of the lower wire S1.
  • the screen S1 is lubricated on its contact surface with the sealing filler 1.
  • Barrier liquid 9 reaches this contact surface via openings L in the sealing filler 1.
  • at least one e.g. Flat jet nozzle D lubricated the contact surface of the screen S1 to the lower strips 3.
  • these two lubrication options can also be used simultaneously.

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  • Paper (AREA)
EP97106037A 1996-04-19 1997-04-12 Procédé et appareil pour rendre latéralement étanche la zone de déshydratation d'un machine à papier à deux toiles Withdrawn EP0802281A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19615503 1996-04-19
DE19615503A DE19615503C2 (de) 1996-04-19 1996-04-19 Vorrichtung zum seitlichen Abdichten eines keilförmigen Spaltes in einer Doppelsiebpapiermaschine

Publications (1)

Publication Number Publication Date
EP0802281A1 true EP0802281A1 (fr) 1997-10-22

Family

ID=7791754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97106037A Withdrawn EP0802281A1 (fr) 1996-04-19 1997-04-12 Procédé et appareil pour rendre latéralement étanche la zone de déshydratation d'un machine à papier à deux toiles

Country Status (4)

Country Link
US (1) US5851356A (fr)
EP (1) EP0802281A1 (fr)
CA (1) CA2203060A1 (fr)
DE (1) DE19615503C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19803451A1 (de) * 1998-01-30 1999-08-05 Voith Sulzer Papiertech Patent Naßpartie und Verfahren zum Herstellen einer Faserstoffbahn
CN103062050A (zh) * 2013-01-10 2013-04-24 宁波得利时泵业有限公司 转子泵的填料密封装置

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI112672B (fi) * 1998-10-16 2003-12-31 Metso Paper Inc Laitteisto ja menetelmä kaksiviirarainaimessa
US6136153A (en) * 1999-02-23 2000-10-24 Ahlstrom Glassfibre Oy Foam process web formation using pressure removal of fluid
WO2001041706A2 (fr) * 1999-11-29 2001-06-14 The Collaborative Group, Ltd. Nanotubes de lipides destines a une administration topique
FI116394B (fi) * 2001-05-23 2005-11-15 Metso Paper Inc Selluloosamassan reunan hallintajärjestely rainanmuodostajaa varten sekä menetelmä selluloosamassan reunan hallitsemiseksi
FI115473B (fi) * 2004-03-25 2005-05-13 Process Flow Ltd Oy Laite ja menetelmä paperikoneessa sekä paperikone
FI120205B (fi) * 2007-03-28 2009-07-31 Vaahto Oy Menetelmä ja laitteisto paperi- tai kartonkikoneessa perälaatikosta tulevan massavirtauksen rajoittamiseksi
US8425773B2 (en) 2009-08-21 2013-04-23 Dow Global Technologies Llc End cap assembly adapted for interconnecting filtration elements
EP2549521A1 (fr) 2011-07-21 2013-01-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procédé et dispositif de fabrication de couches pauvres en particules sur des substrats
WO2014066035A2 (fr) 2012-10-26 2014-05-01 Dow Global Technologies Llc Élément de filtration avec capuchon d'extrémité et joint d'étanchéité de face
WO2014176067A1 (fr) 2013-04-26 2014-10-30 Dow Global Technologies Llc Ensemble comprenant des modules enroulés en spirale connectés en série ayant un dispositif de régulation d'écoulement de perméat
JP6475326B2 (ja) 2014-09-24 2019-02-27 ダウ グローバル テクノロジーズ エルエルシー 一体的な生物反応器を含む渦巻き状濾過アセンブリ
BR112017016351A2 (pt) 2015-02-11 2018-03-27 Dow Global Technologies Llc sistema de hiperfiltração submersa
EP3283197B1 (fr) 2015-04-16 2019-06-19 Dow Global Technologies LLC Ensemble filtration comprenant des bioréacteurs et modules à membranes, enroulés en spirale, placés dans des cuves sous pression séparées
EP3283198B1 (fr) 2015-04-16 2019-08-14 Dow Global Technologies LLC Ensemble de filtration comprenant des bioréacteurs enroulés en spirale et modules de membranes d'hyperfiltration
EP3433212A1 (fr) 2016-03-23 2019-01-30 Dow Global Technologies, LLC Ensemble bioréacteur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE500956C (de) * 1930-07-19 J M Voith Maschinenfabrik Langsiebpapier-, Karton- oder Pappenmaschine, bei der die Begrenzung der Stoffbahn durch zwei in der Breite verstellbare Begrenzungsstreifen und durch Wasserstrahlen erfolgt
DE1511238A1 (de) * 1966-03-01 1969-09-04 Voith Gmbh J M Siebpartie einer Langsieb-Entwaesserungsmaschine zum Herstellen von Faserstoffbahnen
US3563854A (en) * 1966-08-06 1971-02-16 Voith Gmbh J M Sealing arrangement for a breast box of a papermaking machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3595744A (en) * 1965-12-22 1971-07-27 Helge Natanael Skoldkvist Pulp-forming machine
FI760291A7 (fr) * 1976-02-06 1977-08-07 Tampella Oy Ab
FI74879C (fi) * 1986-11-05 1989-01-16 Rauma Repola Oy Filterbandpress.
DE3923495C1 (fr) * 1989-07-15 1991-01-24 M + C Schiffer Gmbh, 5466 Neustadt, De

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE500956C (de) * 1930-07-19 J M Voith Maschinenfabrik Langsiebpapier-, Karton- oder Pappenmaschine, bei der die Begrenzung der Stoffbahn durch zwei in der Breite verstellbare Begrenzungsstreifen und durch Wasserstrahlen erfolgt
DE1511238A1 (de) * 1966-03-01 1969-09-04 Voith Gmbh J M Siebpartie einer Langsieb-Entwaesserungsmaschine zum Herstellen von Faserstoffbahnen
US3563854A (en) * 1966-08-06 1971-02-16 Voith Gmbh J M Sealing arrangement for a breast box of a papermaking machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19803451A1 (de) * 1998-01-30 1999-08-05 Voith Sulzer Papiertech Patent Naßpartie und Verfahren zum Herstellen einer Faserstoffbahn
CN103062050A (zh) * 2013-01-10 2013-04-24 宁波得利时泵业有限公司 转子泵的填料密封装置
CN103062050B (zh) * 2013-01-10 2016-04-20 宁波得利时泵业有限公司 转子泵的填料密封装置

Also Published As

Publication number Publication date
DE19615503A1 (de) 1997-10-23
US5851356A (en) 1998-12-22
DE19615503C2 (de) 1998-10-29
CA2203060A1 (fr) 1997-10-19

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