WO2011098397A1 - Système de séchage - Google Patents

Système de séchage Download PDF

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Publication number
WO2011098397A1
WO2011098397A1 PCT/EP2011/051617 EP2011051617W WO2011098397A1 WO 2011098397 A1 WO2011098397 A1 WO 2011098397A1 EP 2011051617 W EP2011051617 W EP 2011051617W WO 2011098397 A1 WO2011098397 A1 WO 2011098397A1
Authority
WO
WIPO (PCT)
Prior art keywords
drying
roller
group
arrangement
long
Prior art date
Application number
PCT/EP2011/051617
Other languages
German (de)
English (en)
Inventor
Erich Rollenitz
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
Priority to EP11703197A priority Critical patent/EP2534298A1/fr
Priority to CN201180018694.6A priority patent/CN102834564A/zh
Publication of WO2011098397A1 publication Critical patent/WO2011098397A1/fr

Links

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
    • 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
    • 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
    • D21F7/005—Wire-tensioning devices

Definitions

  • the invention relates to a drying arrangement for drying a fibrous web, in particular a paper, tissue or board web, comprising at least one short drying group and at least one long drying group.
  • the invention has for its object to provide a cost-effective, yet reliable solution for a drying arrangement for drying a fibrous web.
  • the object is achieved by a drying arrangement for drying a fibrous web, in particular a paper, tissue or board web, in particular in a paper machine or in a paper finishing machine, wherein the drying arrangement at least one short drying group (14,15) and at least one long drying group (1 ).
  • the at least one long drying group (1) is preceded and / or followed by at least one short drying group (14, 15) and wherein the at least one long drying group (1) has at least 7 drying cylinders (2) and the at least one short drying group (1 ) has at most 5 drying cylinders.
  • the drying groups are separated by separation points from each other, where the fibrous web to the dryer fabric of the subsequent drying group or is transferred to a subsequent section of the paper machine or paper finishing machine.
  • Fibrous web properties is adjusted according to the invention.
  • short drying groups at the beginning of the drying arrangement allow a gentle adjustment of the trains, that is the speed differences of the successive dryer groups, with a low dry content and thus still low strength of the fibrous web.
  • longer periods can follow the short drying groups
  • Drying groups are provided, so that, compared to the prior art, a total of less drying groups are necessary. This reduces the initial cost of the drying device for a paper machine and for a paper finishing machine.
  • At least two, preferably at least three long drying groups (1) are arranged directly one behind the other.
  • At least two short drying groups are arranged in front of the at least one long drying group.
  • Fiber web can be avoided as a result of shrinkage stresses. Depending on the type of paper, however, several short drying groups are possible. In a further advantageous embodiment of the invention is the
  • Dry content of the fibrous web at the beginning of the first long drying group greater than 56%, in particular greater than 60%, preferably greater than 65%. Due to the consequent higher strength of the fibrous web cost-effective long drying groups can be used without jeopardizing the runability of the paper machine and the paper finishing machine.
  • the at least one long drying group expediently has at least 8, in particular at least 9 drying cylinders.
  • the at least one short drying group has at most 4 drying cylinders.
  • the at least one long drying group comprises a plurality of guide rollers and a plurality of drying cylinders, as well as at least one tensioning roller and at least one regulator roller and a drying wire which forms a loop and in the machine direction
  • Drying cylinder and then guided in the return on the tension roller and the governor roller, wherein the fibrous web is disposed on the outside of the loop of the dryer and is in direct contact with the drying cylinders. Due to the large number of drying cylinders in this long drying group, fewer drying groups are in one
  • Drying arrangement of a paper machine and paper finishing machine for drying the fibrous web necessary.
  • There are equipment such as sieves, sieve regulator, voltage regulator,
  • Drying groups are each replaced with eight drying cylinders. It is also clear from this example that the number of separation points between the drying groups is also reduced by the solution according to the invention. This increases the reliability, especially when transferring the paper web after a demolition or after restarting.
  • at least one support roller is arranged in the return within the loop of the dryer fabric. The use of a support roller in the return of the dryer fabric, in addition to the tension roller and the regulator roller and the optionally present guide rollers at the beginning and at the end of the return of the dryer, improves the smoothness of the dryer in accordance with the invention larger dryer groups.
  • the arrangement of the support roller within theresiebschlaufe, on the side facing away from the fibrous web side of the dryer fabric, on the one hand reduces the tendency to fouling and on the other hand thereby solutions with low height possible. Since the drying arrangement according to the invention is arranged within a drying hood, for example a dryer section of a paper machine, the height of the drying hood, at least in the region of the drying arrangement according to the invention, can be reduced as a result of the reduced overall height. This also leads to a cost reduction.
  • the support roller is arranged between the tensioning roller and the regulator roller. This can be advantageous
  • the support roller is preferably in the return of the dryer fabric so
  • the unsupported length of the dryer fabric is less than 12 m, preferably less than 10 m, in particular less than 8 m. This supports the stabilization of the dryer fabric, especially at higher speeds.
  • the tension roller, the regulator roller and the support roller in the return of the dryer fabric arranged so are that the drying wire - after an optional existing, arranged directly after the last drying cylinder of the dryer group guide roller - is first passed over the tension roller. It is also possible that the tension roller, the regulator roller and the support roller are arranged in the return of the dryer fabric so that in
  • the regulator roller between the support roller and the tension roller arranged.
  • the drying wire wraps around the support roller and the
  • Regulator roller partially such that the wrap angle of the regulator roller is greater than or equal to the wrap angle of the support roller.
  • drying wire wraps around the
  • Support roller partially and the horizontal and vertical spacing of the tension roller and / or the regulator roller are chosen so that the wrap angle to the support roller is greater than 4 °, in particular greater than 6 °, preferably greater than 8 °. This favors, on the one hand, that the slip between
  • Drying screen and support roller is not too large and on the other hand, a stable leadership of the dryer.
  • the vertical distance of the highest point of the return of the dryer fabric to the machine level is at most 4.5 times, in particular at most 4, (Mache, preferably at most 3.5 times the diameter of a drying cylinder.
  • drying wire partially wraps around the regulator roller and the position of the regulator roller is selected such that the
  • Wrap angle in the range of 15 ° to 35 °, in particular from 20 ° to 30 °, preferably from 22 ° to 27 °.
  • the at least one is expediently
  • Support roller associated with a drive.
  • At least one drying cylinder is designed to be heatable.
  • at least one drying cylinder is designed to be steam-heated.
  • At least one drying cylinder is heatable.
  • all drying cylinders are designed to be heatable.
  • the at least one long drying group and / or the at least one short drying group are designed as single-row drying groups.
  • the drying cylinders are arranged in a plane above the guide rollers. This favors the removal of remnants of the fibrous web in a demolition.
  • the guide rollers are carried out besaugbar.
  • web stabilizers are provided between the drying cylinders and the guide rollers for stabilizing the run of the fibrous web.
  • tension, support and regulator roller additionally arranged a remedysiebleitwalze at the beginning and at the end of the return of the dryer. There are thus no external rollers, except the drying cylinders, provided.
  • FIG. 1 shows a drying arrangement according to the invention in FIG. 1
  • FIG. 2 shows an embodiment of a long drying group with 8
  • This drying arrangement 20 consists of three long drying groups 1, these 2 short drying groups 14
  • the short drying groups 14,15 are each equipped with 4 drying cylinders 2.
  • the long drying groups 1 each consist of 8
  • Drying cylinders 2 All drying groups 1, 14, 15 are single-row.
  • Figure 2 shows a long drying group 1 as part of
  • Drying arrangement for drying a fibrous web 10, in particular a paper, tissue or board web on the example of a long
  • Drying cylinders 2 This drying group 1 is considered a single-row
  • Drying group performed with overhead drying cylinders 2. This arrangement favors the removal of fibrous web residues in the case of breaks of the fibrous web 10 during production.
  • the dryer 4 of the drying group 1 takes the fibrous web 10 from the drying cylinder of the preceding drying group 14 and runs along with the
  • Fiber web 10 meandering alternately in the machine direction 9 to the guide rollers 3 and the drying cylinder 2.
  • Fibrous web 10 in direct contact with the surface of the heated drying cylinder.
  • the fibrous web 10 is guided on the drying wire 4 lying outside.
  • the guide rollers 3 are directly via the bearing pins or indirectly via the web stabilizers 16, which are each arranged in the pockets between two adjacent drying cylinders 2 and a guide roller 3, sucked. This ensures a stable run of the fibrous web 10.
  • the fibrous web 10 is separated from the dryer 4 and on the
  • the dryer 4 is after the last
  • Drying cylinder 2 at the beginning of the return 8 of the drying wire 4, via a guide roller 17 to the tension roller 5 and then via a support roller. 6 and regulator roller 7 to another guide roller 17, at the end of the return 8, out.
  • the support roller 6 is disposed between the tension roller 5 and the regulator roller 7.
  • the unsupported length of the dryer 4 is less than 12 m.
  • the dryer 4 wraps around the support roller 6 partially and the horizontal and vertical spacing of the tension roller 5 and / or the
  • Regulator roll 7 are selected so that the wrap angle 12 on the support roller 6 is greater than 4 °, in particular greater than 6 °, preferably greater than 8 °. This favors, on the one hand, that the slip between
  • the vertical separation of the highest point of the return 8 of the dryer fabric 4 is to the machine plane 1 1 at most 4.5 times, in particular at most the 4, ( 1, preferably not more than 3.5 times the diameter of a drying cylinder 2.
  • the representation in FIG. 1 is not to scale and shows only one diagram. when the angle of wrap on the support roller is less than 15 °, in particular less than 13 °, preferably less than 11 ° ..
  • the position of the regulator roller is selected such that the wrap angle 13 is in the range of 15 ° to 35 °, in particular 20 ° to 30 °, preferably from 22 ° to 27 °.

Landscapes

  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

L'invention concerne un système de séchage (20) destiné à sécher une bande de matière fibreuse (10), notamment une bande de papier, de papier à usage sanitaire et domestique ou de carton, comprenant au moins un groupe de séchage de petite longueur (14, 15) et au moins un groupe de séchage de grande longueur (1). Le système de séchage (20) selon l'invention est caractérisé en ce que ledit au moins un groupe de séchage de grande longueur (1) est précédé et/ou suivi par au moins un groupe de séchage de petite longueur (14, 15) et ledit au moins un groupe de séchage de grande longueur (1) comprend au moins 7 cylindres sécheurs (2) et ledit au moins un groupe de séchage de petite longueur (14, 15) comprend 5 cylindres sécheurs au maximum.
PCT/EP2011/051617 2010-02-12 2011-02-04 Système de séchage WO2011098397A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11703197A EP2534298A1 (fr) 2010-02-12 2011-02-04 Système de séchage
CN201180018694.6A CN102834564A (zh) 2010-02-12 2011-02-04 干燥设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010001879.1 2010-02-12
DE201010001879 DE102010001879A1 (de) 2010-02-12 2010-02-12 Trocknungsanordnung

Publications (1)

Publication Number Publication Date
WO2011098397A1 true WO2011098397A1 (fr) 2011-08-18

Family

ID=43627313

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/051617 WO2011098397A1 (fr) 2010-02-12 2011-02-04 Système de séchage

Country Status (4)

Country Link
EP (1) EP2534298A1 (fr)
CN (1) CN102834564A (fr)
DE (1) DE102010001879A1 (fr)
WO (1) WO2011098397A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8906273U1 (fr) * 1989-05-20 1990-06-13 J.M. Voith Gmbh, 7920 Heidenheim, De
EP0428768A1 (fr) * 1989-11-20 1991-05-29 J.M. Voith GmbH Section de séchage d'une machine pour la fabrication de bandes fibreuses
DE4401028C1 (de) * 1994-01-15 1995-03-09 Voith Gmbh J M Baugruppe einer Papiermaschine, insbesondere Trockengruppe der Trockenpartie einer Papiermaschine
US5770015A (en) * 1994-05-11 1998-06-23 Voith Sulzer Papiermaschinen Gmbh Drying section of a paper machine
US5862607A (en) * 1995-10-18 1999-01-26 Voith Sulzer Papiermaschinen Gmbh Single-tier drying section tailored for compensating stretching and shrinking of paper web
US6280576B1 (en) * 1996-07-31 2001-08-28 Valmet Corporation After-dryer in a paper machine
WO2006070063A1 (fr) * 2004-12-31 2006-07-06 Metso Paper, Inc. Procede pour ameliorer le comportement machine d'une partie de sechage d'une machine a papier, utilisation d'un cylindre de sechage rotatif, partie de sechage d'une machine a papier et procede de selection d'une strategie de sechage
DE102007042913A1 (de) * 2007-09-08 2009-03-12 Voith Patent Gmbh Siebspanner in Papiermaschine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8906273U1 (fr) * 1989-05-20 1990-06-13 J.M. Voith Gmbh, 7920 Heidenheim, De
EP0428768A1 (fr) * 1989-11-20 1991-05-29 J.M. Voith GmbH Section de séchage d'une machine pour la fabrication de bandes fibreuses
DE4401028C1 (de) * 1994-01-15 1995-03-09 Voith Gmbh J M Baugruppe einer Papiermaschine, insbesondere Trockengruppe der Trockenpartie einer Papiermaschine
US5770015A (en) * 1994-05-11 1998-06-23 Voith Sulzer Papiermaschinen Gmbh Drying section of a paper machine
US5862607A (en) * 1995-10-18 1999-01-26 Voith Sulzer Papiermaschinen Gmbh Single-tier drying section tailored for compensating stretching and shrinking of paper web
US6280576B1 (en) * 1996-07-31 2001-08-28 Valmet Corporation After-dryer in a paper machine
WO2006070063A1 (fr) * 2004-12-31 2006-07-06 Metso Paper, Inc. Procede pour ameliorer le comportement machine d'une partie de sechage d'une machine a papier, utilisation d'un cylindre de sechage rotatif, partie de sechage d'une machine a papier et procede de selection d'une strategie de sechage
DE102007042913A1 (de) * 2007-09-08 2009-03-12 Voith Patent Gmbh Siebspanner in Papiermaschine

Also Published As

Publication number Publication date
EP2534298A1 (fr) 2012-12-19
CN102834564A (zh) 2012-12-19
DE102010001879A1 (de) 2011-08-18

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