EP1460171A2 - Procédé de traitement d'une bande fibreuse - Google Patents

Procédé de traitement d'une bande fibreuse Download PDF

Info

Publication number
EP1460171A2
EP1460171A2 EP04101045A EP04101045A EP1460171A2 EP 1460171 A2 EP1460171 A2 EP 1460171A2 EP 04101045 A EP04101045 A EP 04101045A EP 04101045 A EP04101045 A EP 04101045A EP 1460171 A2 EP1460171 A2 EP 1460171A2
Authority
EP
European Patent Office
Prior art keywords
web
fibrous web
steam
roller
machine
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
EP04101045A
Other languages
German (de)
English (en)
Other versions
EP1460171A3 (fr
EP1460171B1 (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 Paper 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 Paper Patent GmbH filed Critical Voith Paper 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 cardboard web within a machine for producing and / or refining the fibrous web, the fibrous web passing through a plurality of rollers, in particular pairs of rollers, on its path through the machine, and wherein an opening outlet gap forms between the roll in question and the running fibrous web.
  • the object of the invention is therefore to develop a method in which the disadvantages inherent in the prior art can be avoided.
  • the inventors have recognized that to reduce the tendency of the fibrous web to adhere to the smooth roll, it is not suitable to generate a steam cushion at the inlet nip, but rather to achieve an improved web detachment by blowing the steam in backwards - i.e. at the outlet nip or outlet spout becomes.
  • the advantage of backward injection is that due to the negative pressure on the discharge line, the vapor is literally sucked in and thus safely reaches the gusset point.
  • the steam condenses, which increases the temperature of the liquid in the outlet gap (from, for example, pressed water and adhesive substances of the fibrous web) and thus reduces the viscosity and the surface tension. This reduces the force with which the web has to be pulled off the roller. The risk of tearing is significantly reduced.
  • the method according to the invention can therefore be used particularly advantageously in the wet press within the press section of the paper machine. Only a few web trains are required and the risk of demolition can be reduced to a minimum.
  • a further application can take place in the dryer section, preferably in the first dryer groups, where the web is still wet and therefore tends to stick particularly strongly to the heated drying cylinder.
  • the method according to the invention is implemented in that at least one spray nozzle directs steam, in particular superheated steam, into the outlet gap existing between the fibrous web and the relevant roller or drying cylinder.
  • at least one spray nozzle directs steam, in particular superheated steam, into the outlet gap existing between the fibrous web and the relevant roller or drying cylinder.
  • a single nozzle acting from the driver's or drive side of the machine and extending over the entire width of the machine or the width of the outlet gap, or a nozzle traversing over said width or a plurality of individual nozzles can be used.
  • a so-called wet press which is part of the press section of a papermaking machine and consists of the press rolls 1 and 2, can be seen from FIG.
  • the fibrous web i.e. Paper web 3 (hereinafter referred to only as “web") is guided together with a dewatering felt 4 through a press nip N (nip).
  • steam D in particular superheated steam
  • the existing gusset liquid is designated 6.
  • This liquid 6 is increased in temperature by condensation of the sprayed-in steam by means of steam spray nozzle 7 and thus the viscosity is reduced.
  • the adhesion of the web 3 to the roller can be significantly reduced and the web 3 can, as provided, follow the further travel path L through the machine.
  • the steam spray nozzle 7 can also be installed between the felt 4 and the web 3 on the other side of the web (not shown in FIG. 1), which further increases the effect or can act alone.
  • the web 3 runs, as in FIG. 1, in the direction of arrow L through the smoothing nip N.
  • the nozzle is 7 and 7a.
  • Nozzle 7 is assigned to roller 8 above web 3
  • nozzle 7a is assigned to roller 9 below web 3.
  • the nozzle 7 can be operated simultaneously with the nozzle 7a. Depending on the requirement, only one of the nozzles 7 or 7a can act.
  • the web 3 runs over a drying cylinder 13, the web 3 being pressed in a manner known per se by a so-called upper felt 14 against the drying cylinder 13 shown.
  • a gusset or outlet gap 5 into which steam is blown by means of spray nozzle 7.
  • the additional arrangement of a steam spray nozzle 7a between dryer fabric 14 and web 3 is possible. This is particularly useful in the first dryer groups, where web 3 is still very damp.
  • the web 3 is fed via a web guide roller 15 to one or more further drying cylinders, not shown, of the production machine
  • nozzles 7 and 7a can each have a single outflow cross-section extending over the respective outlet gap 5.
  • the introduction of the steam can, however, also take place from a jet which extends outside the web width and acts transversely to the opposite web edge.
  • a traversing nozzle is also conceivable.
  • a row of nozzles with outflow nozzles distributed in the transverse direction can also be used. It is possible to vary the outflow direction and or the vapor pressure.
  • the amount of steam can be controlled and also regulated depending on the web tension and / or the differential moisture of the web 3.
  • said rolls 2, 8, 9 and 13 or pairs of rolls have a smooth surface and, despite the high web speed of 1800 1800 m / min, the release behavior of the fibrous web 3 is noticeably improved due to the hot steam injection.

Landscapes

  • Paper (AREA)
  • Nonwoven Fabrics (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
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 true EP1460171A2 (fr) 2004-09-22
EP1460171A3 EP1460171A3 (fr) 2005-05-25
EP1460171B1 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)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE413177C (de) 1920-05-25 1925-05-09 Ogden Minton Einrichtung zum Abheben blattfoermigen Gutes, z.B. einer Paplerbahn, von einem Foerderband oder vom Trockenzylinder einer Trockenanlage
US5534116A (en) 1991-12-19 1996-07-09 Valmet Paper Machinery Inc. Compact press section with closed draw of the web in a paper machine
DE19741517A1 (de) 1997-09-20 1999-03-25 Voith Sulzer Papiermasch Gmbh Verfahren zur Verringerung der Haftung einer feuchten Faserstoffbahn an einer rotierenden Walze
EP0930397A1 (fr) 1998-01-13 1999-07-21 Voith Sulzer Papiertechnik Patent GmbH Dispositif et procédé pour d'enduction d'une substance liquide ou pâteuse sur une bande en mouvement, particulièrement en papier ou en carton

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1605067A (en) * 1926-11-02 Paper-making 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
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE413177C (de) 1920-05-25 1925-05-09 Ogden Minton Einrichtung zum Abheben blattfoermigen Gutes, z.B. einer Paplerbahn, von einem Foerderband oder vom Trockenzylinder einer Trockenanlage
US5534116A (en) 1991-12-19 1996-07-09 Valmet Paper Machinery Inc. Compact press section with closed draw of the web in a paper machine
DE19741517A1 (de) 1997-09-20 1999-03-25 Voith Sulzer Papiermasch Gmbh Verfahren zur Verringerung der Haftung einer feuchten Faserstoffbahn an einer rotierenden Walze
EP0930397A1 (fr) 1998-01-13 1999-07-21 Voith Sulzer Papiertechnik Patent GmbH Dispositif et procédé pour d'enduction d'une substance liquide ou pâteuse sur une bande en mouvement, particulièrement en papier ou en carton

Also Published As

Publication number Publication date
DE10311993A1 (de) 2004-10-14
EP1460171A3 (fr) 2005-05-25
DE502004010655D1 (de) 2010-03-11
EP1460171B1 (fr) 2010-01-20
ATE455900T1 (de) 2010-02-15

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