EP0960973B1 - Section de séchage à étage unique - Google Patents

Section de séchage à étage unique Download PDF

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Publication number
EP0960973B1
EP0960973B1 EP99630046A EP99630046A EP0960973B1 EP 0960973 B1 EP0960973 B1 EP 0960973B1 EP 99630046 A EP99630046 A EP 99630046A EP 99630046 A EP99630046 A EP 99630046A EP 0960973 B1 EP0960973 B1 EP 0960973B1
Authority
EP
European Patent Office
Prior art keywords
dryer
vacuum
felt
web
fabric
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
EP99630046A
Other languages
German (de)
English (en)
Other versions
EP0960973A3 (fr
EP0960973A2 (fr
Inventor
Jeffrey Henry Pulkowski
Rajendra D. Deshpande
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.)
Beloit Technologies Inc
Original Assignee
Beloit Technologies Inc
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 Beloit Technologies Inc filed Critical Beloit Technologies Inc
Publication of EP0960973A2 publication Critical patent/EP0960973A2/fr
Publication of EP0960973A3 publication Critical patent/EP0960973A3/fr
Application granted granted Critical
Publication of EP0960973B1 publication Critical patent/EP0960973B1/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
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts

Definitions

  • CA-A-2 216 048 there is described a single tier dryer section of a papermaking machine according to the preamble of claim 1. More specifically, in CA-A-2 216 048, the single dryer section has dryer rolls with a reversing vacuum roll positioned between each pair to transfer and wrap the dryer felt and paper web against the next dryer roll. A vacuum box is positioned between adjacent dryer rolls and over the vacuum roll to hold the web on the dryer felt by vacuum, and the dryer felt has a permeability of between 2134 and 15240 cm 3 /min/cm2 (70 and 500 cubic feet per minute per square foot).
  • the permeability of the dryer felt is at least 18288 cm 3 /min/cm 2 (600 cfm).
  • the present invention includes the employment of an open fabric or dryer felt having a high permeability. Additionally, trials on a pilot single tier BelChamp type dryer section have shown that an open fabric having a high permeability of 18288 cm 3 /min/cm 2 (600 cfm) can be used without blowing the sheet in the pocket areas.
  • the felt according to the present invention is preferably of the type having an open structure and having a permeability of 18288 cm 3 /min/cm 2 (600 cfm) while being of a lower caliper.

Landscapes

  • Paper (AREA)
  • Drying Of Solid Materials (AREA)

Claims (1)

  1. Section de séchoir à un seul niveau (18) d'une machine de fabrication de papier comprenant:
    un groupe de cylindres de séchoir (12A; 24, 26, 28), dans lequel chaque cylindre de séchoir (12A; 24, 26, 28) du groupe a une portion enroulée par un dispositif de feutre de séchoir (16A) pour supporter une toile (WA) à travers la section de séchage à un seul niveau (18),
    des rouleaux de dépression (14A ; 30, 32) entre des cylindres de séchoir adjacents (12A ; 24, 26, 28) du groupe,
    dans lequel ledit dispositif de feutre de séchoir (16A) comprend un feutre en boucle (16A) qui s'étend successivement autour de chacun desdits cylindres de séchoir (12A; 24, 26, 28) et de chacun desdits rouleaux de dépression (14A; 30, 32), et
    des boîtiers de dépression passifs (20, 22) disposés dans les poches au-dessus desdits rouleaux de dépression (14A; 30, 32) entre les cylindres de séchoir adjacents (24, 26, 28) du groupe,
    caractérisée en ce que
    les boîtiers de dépression passifs (20, 22) sont uniquement disposés dans la deuxième poche et dans la troisième poche respectivement entre le deuxième cylindre de séchoir (24) et le troisième cylindre de séchoir (26) et entre le troisième cylindre de séchoir (26) et le quatrième cylindre de séchoir (28) du groupe,
    ledit feutre en boucle (16A) a une grande perméabilité qui est d'au moins 18 288 cm3/mn/cm2 (600 cfm) de manière à ce que la dépression à l'intérieur de chaque rouleau de dépression (14A; 30, 32) génère une pression négative sur le côté opposé du passage de feutre par rapport à la toile (WA) pendant le transit de la toile (WA) de chaque cylindre de séchoir (12A; 24, 26, 28) à chaque rouleau de dépression (14A ; 30, 32) de ladite section de séchoir à un seul niveau, et la pression négative générée dans lesdits boîtiers de dépression passifs (20, 22) maintient la toile (WA) contre le feutre de grande perméabilité (16A).
EP99630046A 1998-05-20 1999-05-07 Section de séchage à étage unique Expired - Lifetime EP0960973B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8238998A 1998-05-20 1998-05-20
US82389 1998-05-20

Publications (3)

Publication Number Publication Date
EP0960973A2 EP0960973A2 (fr) 1999-12-01
EP0960973A3 EP0960973A3 (fr) 2000-07-05
EP0960973B1 true EP0960973B1 (fr) 2007-01-03

Family

ID=22170889

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99630046A Expired - Lifetime EP0960973B1 (fr) 1998-05-20 1999-05-07 Section de séchage à étage unique

Country Status (4)

Country Link
EP (1) EP0960973B1 (fr)
JP (1) JP3236997B2 (fr)
CA (1) CA2270755A1 (fr)
DE (1) DE69934630T2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005026310A1 (de) * 2005-06-08 2006-12-14 Voith Patent Gmbh Papiermaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0171891A1 (fr) * 1984-08-10 1986-02-19 Asten Group, Inc. Tissu laminé pour papeterie en hélices combinées avec une surface molle
EP0211471A1 (fr) * 1985-07-08 1987-02-25 Asten Group, Inc. Bande à couches multiples constituée de maillons de spirales pour la fabrication de papier
EP0873172A1 (fr) * 1995-10-20 1998-10-28 Kimberly-Clark Worldwide, Inc. Milieu filtrant non tisse a rigidite elevee

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4934067A (en) 1987-02-13 1990-06-19 Beloit Corporation Apparatus for drying a web
US5933977A (en) * 1995-09-12 1999-08-10 Beloit Technologies, Inc. Curl control with dryer aircaps
US5873180A (en) * 1996-09-25 1999-02-23 Beloit Technologies, Inc. Papermaking dryer section with partitioned vacuum box for threading

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0171891A1 (fr) * 1984-08-10 1986-02-19 Asten Group, Inc. Tissu laminé pour papeterie en hélices combinées avec une surface molle
EP0211471A1 (fr) * 1985-07-08 1987-02-25 Asten Group, Inc. Bande à couches multiples constituée de maillons de spirales pour la fabrication de papier
EP0873172A1 (fr) * 1995-10-20 1998-10-28 Kimberly-Clark Worldwide, Inc. Milieu filtrant non tisse a rigidite elevee

Also Published As

Publication number Publication date
DE69934630T2 (de) 2007-10-04
JPH11350378A (ja) 1999-12-21
DE69934630D1 (de) 2007-02-15
CA2270755A1 (fr) 1999-11-20
EP0960973A3 (fr) 2000-07-05
EP0960973A2 (fr) 1999-12-01
JP3236997B2 (ja) 2001-12-10

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