EP0818573A2 - Procédé et dispositif pour la déshydratation d'une bande de papier - Google Patents

Procédé et dispositif pour la déshydratation d'une bande de papier Download PDF

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Publication number
EP0818573A2
EP0818573A2 EP97108063A EP97108063A EP0818573A2 EP 0818573 A2 EP0818573 A2 EP 0818573A2 EP 97108063 A EP97108063 A EP 97108063A EP 97108063 A EP97108063 A EP 97108063A EP 0818573 A2 EP0818573 A2 EP 0818573A2
Authority
EP
European Patent Office
Prior art keywords
paper web
press nip
band
bands
dewatering
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
EP97108063A
Other languages
German (de)
English (en)
Other versions
EP0818573B1 (fr
EP0818573A3 (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 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 EP0818573A2 publication Critical patent/EP0818573A2/fr
Publication of EP0818573A3 publication Critical patent/EP0818573A3/fr
Application granted granted Critical
Publication of EP0818573B1 publication Critical patent/EP0818573B1/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
    • 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
    • D21F3/0272—Wet presses in combination with suction or blowing devices

Definitions

  • the invention relates to a method for dewatering a Paper web by the action of a gas pressure.
  • the invention further relates to a device for dewatering a paper web, with a press nip through which a paper web trapped between two bands.
  • wet presses generally roller presses or shoe presses
  • Dry contents are in the press section reached by approx. 50%.
  • a disadvantage with the known arrangement is the previous one Moistening one of the two felt sheets, on the one hand leads to an increased energy requirement and on the other hand the Effectiveness of drying when there is insufficient energy supply reduced.
  • the invention is therefore based on the object of a method and to provide a device for dewatering a paper web, which means a particularly high dry content on gentle and energy-saving way when passing through a press nip can be achieved without having to leave the press nip the risk of blistering or even delamination of the Paper web exists.
  • This invention is applied to a method for dewatering a Paper web released by the action of a gas pressure, that by one essentially across the paper web Directed gas flow moisture expelled from the paper web becomes.
  • the paper web between two belts through a press nip performed, with a first of the two bands of a soft and easily compressible material and the second one two tapes from a hard, relatively incompressible and water-absorbent material.
  • At least the first volume or the roller over which the first belt is guided is heated.
  • a hot air flow be directed across the paper web.
  • the press nip can be formed by a shoe press. It is understood that here also the counter roll of the shoe press roll as a suction roll can be trained.
  • the press nip is formed by two screen rollers, between which a pressure drop is provided.
  • FIG. 1 shows a device according to the invention as a whole number 10.
  • the device 10 comprises a shoe press which consists of a underlying shoe press roll 16 and an overhead Counter roll 18 is made.
  • a shoe press which consists of a underlying shoe press roll 16 and an overhead Counter roll 18 is made.
  • By the between the two rollers 16, 18 formed press nip 12 passes a paper web 14, the between an upper first band 20 and a lower, second Volume 22 is performed.
  • the first tape is made 20, which can also be formed as a felt tape as dry as possible, slightly compressible and soft Material.
  • FIG. 1 An additional Heating can be achieved like this through a heating element 24 for heating the first band 20 and by a heating element 26 for heating the counter roller 18 is shown in FIG. 1.
  • FIG. 1 A modification of the arrangement according to FIG. 1 is shown schematically in FIG Fig. 2 and generally designated by the number 30.
  • the paper web 14 passes through a press nip 32, which is formed by two screen rollers 36, 38.
  • drying effect can be improved by that a hot air stream or a hot steam stream from the screen roller 38 passes into the screen roller 36.
  • FIG. 3 Another modification of the arrangement according to FIG. 1 is shown schematically in Fig. 3 and overall with the number Designated 50.
  • the paper web 14 passes through a press nip 52, that of an overhead shoe press roll 56 and one below it arranged suction roller 58 is formed.

Landscapes

  • Paper (AREA)
  • Drying Of Solid Materials (AREA)
EP97108063A 1996-07-11 1997-05-17 Procédé et dispositif pour la déshydratation d'une bande de papier Expired - Lifetime EP0818573B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19627890 1996-07-11
DE19627890A DE19627890A1 (de) 1996-07-11 1996-07-11 Verfahren und Vorrichtung zum Entwässern einer Papierbahn

Publications (3)

Publication Number Publication Date
EP0818573A2 true EP0818573A2 (fr) 1998-01-14
EP0818573A3 EP0818573A3 (fr) 1999-01-13
EP0818573B1 EP0818573B1 (fr) 2002-08-21

Family

ID=7799503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97108063A Expired - Lifetime EP0818573B1 (fr) 1996-07-11 1997-05-17 Procédé et dispositif pour la déshydratation d'une bande de papier

Country Status (3)

Country Link
EP (1) EP0818573B1 (fr)
CA (1) CA2210653A1 (fr)
DE (2) DE19627890A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000006825A1 (fr) * 1998-07-27 2000-02-10 Lefkowitz Leonard R Courroie de pompage d'air
DE10304575A1 (de) * 2003-02-05 2004-08-19 Voith Paper Patent Gmbh Pressspaltanordnung
EP4230792A1 (fr) * 2022-02-11 2023-08-23 Beck Displacement Press LLC Déshydratation par déplacement d'une bande à l'aide de gaz comprimé

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19946971A1 (de) 1999-09-30 2001-04-05 Voith Paper Patent Gmbh Vorrichtung zur Entwässerung einer Materialbahn
DE19946986A1 (de) * 1999-09-30 2001-04-05 Voith Paper Patent Gmbh Vorrichtung und Verfahren zur Herstellung einer Materialbahn
DE19946979A1 (de) * 1999-09-30 2001-04-05 Voith Paper Patent Gmbh Vorrichtung zur Entwässerung einer Materialbahn

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI71180C (fi) * 1983-05-12 1986-11-24 Valmet Oy Pressvals foer pappersmaskin som aer foersedd med en elastisk ytbelaeggning av skiktkonstruktion samt press foer pappersmaskin daer det anvaends en ifraogavarande pressvals
DE3728124A1 (de) * 1987-08-22 1989-03-02 Escher Wyss Gmbh Entwaesserungspresse mit dampfzufuhr
US4888096A (en) * 1987-12-02 1989-12-19 Inotech Process Ltd. Roll press for removing water from a web of paper using solid grooved roll and compressed air
US5082533A (en) * 1990-04-10 1992-01-21 Beloit Corporation Heated extended nip press with porous roll layers
JP2960999B2 (ja) * 1991-09-04 1999-10-12 三菱重工業株式会社 湿紙移送装置
US5700356A (en) * 1996-01-19 1997-12-23 Lefkowitz; Leonard R. Air permeable belt for dewatering web in press nip

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000006825A1 (fr) * 1998-07-27 2000-02-10 Lefkowitz Leonard R Courroie de pompage d'air
DE10304575A1 (de) * 2003-02-05 2004-08-19 Voith Paper Patent Gmbh Pressspaltanordnung
EP4230792A1 (fr) * 2022-02-11 2023-08-23 Beck Displacement Press LLC Déshydratation par déplacement d'une bande à l'aide de gaz comprimé

Also Published As

Publication number Publication date
EP0818573B1 (fr) 2002-08-21
DE59708001D1 (de) 2002-09-26
EP0818573A3 (fr) 1999-01-13
CA2210653A1 (fr) 1998-01-11
DE19627890A1 (de) 1998-01-15

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