EP1460171B1 - Procédé de traitement d'une bande fibreuse - Google Patents

Procédé de traitement d'une bande fibreuse Download PDF

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Publication number
EP1460171B1
EP1460171B1 EP04101045A EP04101045A EP1460171B1 EP 1460171 B1 EP1460171 B1 EP 1460171B1 EP 04101045 A EP04101045 A EP 04101045A EP 04101045 A EP04101045 A EP 04101045A EP 1460171 B1 EP1460171 B1 EP 1460171B1
Authority
EP
European Patent Office
Prior art keywords
web
fibrous web
steam
smoothing
gap
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
EP04101045A
Other languages
German (de)
English (en)
Other versions
EP1460171A3 (fr
EP1460171A2 (fr
Inventor
Harald Hess
Rüdiger KURTZ
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 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 Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1460171A2 publication Critical patent/EP1460171A2/fr
Publication of EP1460171A3 publication Critical patent/EP1460171A3/fr
Application granted granted Critical
Publication of EP1460171B1 publication Critical patent/EP1460171B1/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
    • D21F3/0272—Wet presses 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
    • 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
    • D21F7/008—Steam showers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus

Definitions

  • the invention relates to a method for treating a fibrous web, in particular a paper or board web within a machine for producing and / or finishing the fibrous web, wherein the fibrous web on its path through the machine a variety of treatment serving rollers, in particular roller pairs, happens and an opening discharge gap is formed between a respective roller and the fibrous web extending from the respective roller.
  • the DE 43 03 315 shows a method for cleaning roll surfaces, wherein the surface with moist air, possibly also steam, is applied, so that a moisture film reduces the doctor blade wear.
  • the DE 413 177 C describes a device for lifting a moving web from a roll by means of steam or air jets.
  • the invention is therefore based on the object to develop a method in which the disadvantages of the prior art are avoidable.
  • the inventors have recognized that for a reduction of the adhesion tendency of the fibrous web on the smooth smoothing roll, not the production of a steam cushion at the inlet gap is suitable, but an improved web detachment is achieved by the back of the steam - ie blown at the outlet gap, or outlet gusset becomes.
  • the backward injection is that due to the negative pressure at the draw line of the steam is sucked formally and so safely arrives at the gusset point.
  • the vapor condenses, whereby the temperature of the liquid located in the outlet gap (made of, for example, pressed-out water and adhesive substances of the fibrous web) is increased and thus the viscosity and the surface tension are lowered. This reduces the force with which the web must be pulled off the roller. The risk of demolition is significantly reduced.
  • the inventive method is used in smoothing the fibrous web by means of heated, known per se soft and / or Hartnip smoothing rollers.
  • the advantage here is lower web pull-off forces.
  • a compensation of the smoothing adjusting moisture loss is achieved in the nip and also a pre-moistening for a following smoothing nip possible.
  • the inventive method is realized by at least one spray nozzle directed steam, in particular superheated steam in the existing between the fibrous web and the respective roller discharge gap.
  • a single from the driver or drive side of the machine acting and over the entire width of the machine or the width of the outlet gap reaching nozzle, or a traversing over said width nozzle or a plurality of individual nozzles can be used.
  • the web 3 runs in the direction of the arrow L through the smooth nip N.
  • the nozzle 7 and 7a are associated above the web 3 of the roller 8, whereas the nozzle 7a below the web 3 of the roller 9 is assigned.
  • the nozzle 7 can be operated at the same time as the nozzle 7a. Depending on the requirement, only one of the nozzles 7 or 7a can act.
  • FIG. 7 a and 7 a may each have a single outflow cross-section extending over the respective outlet gap 5.
  • the introduction of the vapor can also take place from outside the width of the web, acting in the transverse direction to the opposite edge of the web out beam.
  • a traversing nozzle is also conceivable.
  • the amount of steam can be controlled as a function of the web tension of the web 3 and also regulated.
  • the said rolls 8 and 9 or the pair of rolls have a smooth surface and, despite the high web speed of ⁇ 1800 m / min, the detachment behavior of the fibrous web 3 noticeably improves due to the hot steam injection.

Landscapes

  • Paper (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Nonwoven Fabrics (AREA)

Claims (4)

  1. Procédé de traitement d'une bande de matière fibreuse, en particulier d'une bande de papier ou de carton à l'intérieur d'une machine de fabrication et/ou de traitement de celle-ci, dans lequel la bande de matière fibreuse franchit, au cours de son trajet à travers la machine, une pluralité de rouleaux servant au traitement, et il se forme une fente de sortie qui s'ouvre entre un rouleau concerné et la bande de matière fibreuse quittant le rouleau concerné, dans lequel la bande de matière fibreuse est lissée au moyen de rouleaux lisseurs chauffés (8, 9) à emprise douce et/ou dure, dans lequel le rouleau concerné est un rouleau lisseur (8, 9) d'une ou de plusieurs paires de rouleaux lisseurs pour le lissage de surface de la bande de matière fibreuse, et dans lequel la fente de sortie (5) est exposée à de la vapeur, dans lequel on améliore ainsi le pouvoir de décollement de la bande de matière fibreuse humide en mouvement (3) du rouleau lisseur (8, 9) et on préhumidifie la bande de matière fibreuse (3) pour une emprise de lissage qui suit.
  2. Procédé selon la revendication 1, caractérisé en ce que l'on utilise de la vapeur surchauffée.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que l'on commande ou on régule la quantité de vapeur à injecter.
  4. Procédé selon la revendication 3, caractérisé en ce que l'on commande ou on régule la quantité de vapeur en fonction de la traction de la bande (3).
EP04101045A 2003-03-19 2004-03-15 Procédé de traitement d'une bande fibreuse Expired - Lifetime EP1460171B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10311993 2003-03-19
DE10311993A DE10311993A1 (de) 2003-03-19 2003-03-19 Verfahren zur Behandlung einer Faserstoffbahn

Publications (3)

Publication Number Publication Date
EP1460171A2 EP1460171A2 (fr) 2004-09-22
EP1460171A3 EP1460171A3 (fr) 2005-05-25
EP1460171B1 true EP1460171B1 (fr) 2010-01-20

Family

ID=32797954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04101045A Expired - Lifetime EP1460171B1 (fr) 2003-03-19 2004-03-15 Procédé de traitement d'une bande fibreuse

Country Status (3)

Country Link
EP (1) EP1460171B1 (fr)
AT (1) ATE455900T1 (fr)
DE (2) DE10311993A1 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1605067A (en) * 1926-11-02 Paper-making machine
US1595478A (en) * 1920-05-25 1926-08-10 Minton Ogden Method of stripping and feeding paper and apparatus
US5393383A (en) * 1991-12-19 1995-02-28 Valmet Paper Machinery Inc. Compact press section with closed draw of the web in a paper machine
DE4303315A1 (en) * 1993-02-05 1993-06-24 Voith Gmbh J M Paper-making roller scraper - acts together with moist air to reduce blade wear
DE19731100A1 (de) * 1997-07-19 1999-01-21 Voith Sulzer Papiermasch Gmbh Verfahren und Vorrichtung zur Beeinflussung des Haftverhaltens einer Faserstoffbahn
DE19741517A1 (de) 1997-09-20 1999-03-25 Voith Sulzer Papiermasch Gmbh Verfahren zur Verringerung der Haftung einer feuchten Faserstoffbahn an einer rotierenden Walze
DE19800955A1 (de) 1998-01-13 1999-07-15 Voith Sulzer Papiertech Patent Vorrichtung zum Auftragen eines flüssigen oder pastösen Auftragsmediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton
FI113883B (fi) * 1999-08-12 2004-06-30 Runtech Systems Oy Menetelmä ja laitteisto materiaalirainan käsittelemiseksi ja materiaalirainan käyttäytymisen hallitsemiseksi
DE10024296B4 (de) * 2000-05-17 2008-11-20 Voith Patent Gmbh Maschine zur Herstellung einer Materialbahn
DE10157690C1 (de) * 2001-11-24 2003-02-20 Voith Paper Patent Gmbh Verfahren und Kalander zum Glätten einer Faserstoffbahn

Also Published As

Publication number Publication date
ATE455900T1 (de) 2010-02-15
EP1460171A3 (fr) 2005-05-25
EP1460171A2 (fr) 2004-09-22
DE502004010655D1 (de) 2010-03-11
DE10311993A1 (de) 2004-10-14

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