EP1085122A2 - Procédé et dispositif pour le séchage d'une bande - Google Patents

Procédé et dispositif pour le séchage d'une bande Download PDF

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Publication number
EP1085122A2
EP1085122A2 EP00116921A EP00116921A EP1085122A2 EP 1085122 A2 EP1085122 A2 EP 1085122A2 EP 00116921 A EP00116921 A EP 00116921A EP 00116921 A EP00116921 A EP 00116921A EP 1085122 A2 EP1085122 A2 EP 1085122A2
Authority
EP
European Patent Office
Prior art keywords
material web
heated surface
cylinder
heated
web
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.)
Withdrawn
Application number
EP00116921A
Other languages
German (de)
English (en)
Other versions
EP1085122A3 (fr
Inventor
Robert Wolf
Markus Oechsle
Wolfgang Mayer
Thomas Mack
Roland 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 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 EP1085122A2 publication Critical patent/EP1085122A2/fr
Publication of EP1085122A3 publication Critical patent/EP1085122A3/fr
Withdrawn legal-status Critical Current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
    • D21F5/004—Drying webs by contact with heated surfaces or materials
    • 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
    • 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

Definitions

  • the invention relates to a method for drying a material web, especially a paper or cardboard web.
  • the invention also relates to a device for drying a material web and a dryer section a machine for producing a material web.
  • the material web to be dried is used steam-heated cylinders or an arrangement steam-heated cylinders and suction rolls.
  • problems often arise with the web guidance, which are due in particular to the fact that the still moist material web, which does not yet have sufficient strength on the smooth Sticking contact surfaces remains, which is sufficient for sufficient heat transfer required are.
  • This often leads to web breaks and one Overstretching the web edges.
  • By coating the cylinder you can these problems are insufficiently mitigated. The result is that must be ensured that the drying takes place more slowly, whereby the drying section required becomes longer. These are stepping up Problems with higher web speeds.
  • the removal of the material web from the heated Avoid area as long as the material web is not yet sufficiently firm is to easily - and especially without sticking to the heated surface to stay - to be able to be taken off.
  • the material web becomes longer leave in contact with the heated surface so that the material web without disturbances by placing and lifting off a surface can solidify.
  • the material web to be dried is deliberately along a detour, i.e. that of the material web within the respective
  • the total distance to be covered is targeted around the heated surface lengthened to the required length inserting heating section into the machine.
  • a major advantage of the invention is that as a heated surface a smooth surface and in particular a smooth metal surface is provided with the optimal transfer of heat to the Material web and thus efficient web drying is possible.
  • Another advantage of the invention is that by providing a heated surface with which the material web to be dried is in contact brought, additional heating devices for loading the material web with heat are not required.
  • the material web is only then decreased if due to the already comparatively high strength there is no longer a risk of tearing off the material web, or at least is significantly reduced. Since according to the invention the material web is already sufficiently firm or dry at the time of removal, can remove the material web at comparatively high web speeds respectively. The invention therefore not only enables through the contact between the material web and the heated surface is quick Drying, but also allows web drying at high Perform machine speeds.
  • the invention is particularly advantageous in the manufacture of paper or Cardboard sheets used.
  • the heated area can directly be provided behind a press assembly from which the still moist material web, for example, with a dry content of about 45 up to 55% leaks.
  • the material web can be heated Surface to be dried so far that the decrease in the material web at a dry content of about 55 to 65%, for example.
  • the heated area leads to an increase in dryness of at least 1%, preferably at least 2, in particular should lead at least 4%. That is already sufficient strength possessing material web can then be a conventional one, the heated one Area downstream single or multi-row multi-cylinder dryer group be fed. The danger of sticking to the individual Cylinders of this dryer group no longer exist because of the material web is already sufficiently dry.
  • the multi-cylinder dryer group can be comparatively simple because of special measures for guiding a material web that is not yet sufficiently firm required are.
  • the maximal The length of the heated surface is the diameter of the cylinder determined, which is preferably much larger than the diameter of Drying cylinders are selected, which are usually in single or multi-row Multi-cylinder dryer groups of machines for the production of Paper or cardboard webs are used.
  • the diameter of the cylinder can be, for example, twice the size of a conventional one Drying cylinder. Basically, the big cylinder can also be many times larger than the conventional drying cylinders.
  • the size of the cylinder is determined in such a way that between a feed area to which the material web is fed to the heated surface and onto the outer surface of the cylinder is attached, and a removal area on which the material web is removed from the heated surface, a sufficient there is a long heating section in the direction of web travel in the removal area a sufficiently high degree of strength of the material web guarantee.
  • heated Surface the outer surface of a guided around at least two deflection rollers Endless belt provided. Only two deflection rollers are preferred provided so that the endless belt in the manner of a conveyor belt to be led. By changing the distance between the two The length of the heated surface can be varied using deflection rollers. On this can be adapted to the desired web or machine speed or other properties of the material web and / or the manufacturing machine. In principle, it is according to the invention also possible to close the endless belt by more than two pulleys to lead.
  • the material web by means of an air-permeable belt, preferably a sieve belt, kept in contact with the heated surface and in particular on pressed the heated surface.
  • a dryer fabric is preferred for this used that is free of markings and has sufficient openness, to evaporate the moisture contained in the material web to enable.
  • this can also be individually covered, so that the decrease of the material web through a possible differential speed one for removing the material web provided suction roller is favored.
  • the material web glued to the heated surface.
  • This is the material web not through special measures such as Sieve belts in contact with the heated area.
  • the material web is preferably adhered through a pressure roller, this directly from a lower or upper press felt of a press arrangement upstream of the heated surface can be done from. But it can be used to feed the material web an additional one from the press arrangement to the heated surface Feeding device, for example a transfer felt, transfer screen or Transfer belt, can be provided.
  • the invention also provides a device for drying a material web and a dryer section of a machine for producing a Material web protected.
  • Fig. 1 shows part of a machine for producing a in the following referred to as material web paper or cardboard web, in which between a press assembly 20 and a multi-cylinder dryer group 30 a Drying device is arranged according to the invention.
  • the drying device comprises a cylinder 14, the area of a sieve belt 16 is wrapped.
  • a web of material, not shown passes through a gap formed by two press rolls 21, in which the Material web between an upper press felt 29a and a lower one Press felt 29b is arranged. From the lower press felt 29b the material web removed by a suction roller 31 deflecting the wire belt 16. By means of the screen belt 16, the material web is over another Suction roller 31 fed to the cylinder 14. The material web is located now between the outer surface of the cylinder 14 and the screen belt 16 and is through the screen belt 16 on the outer surface of the cylinder 14 pressed.
  • the material web 12 continues alone through to a suction roll 18 which deflects a dryer fabric 33 of the multi-cylinder dryer group 30 is and with which the material web is removed from the cylinder 14.
  • a suction roll 18 which deflects a dryer fabric 33 of the multi-cylinder dryer group 30 is and with which the material web is removed from the cylinder 14.
  • the suction roller 18 and the drying wire 33 the material web then fed to the multi-cylinder dryer group 30, of which in Fig. 1 shows two drying cylinders 32 and a screen suction roller 36 are.
  • the outer surface of the cylinder 14 is heatable, so that the material web pressed through the sieve belt 16 onto a heated surface 11 and through Evaporation of the moisture contained in the material web dried becomes.
  • the sieve belt 16 is free of markings and sufficiently open to be to allow optimal evaporation.
  • the heating of the cylinder jacket can be done in different ways and Way. For example, it is possible to remove the cylinder jacket from to be exposed to the inside with a hot fluid, for example with steam or gas and thus to heat the outer surface from the inside.
  • the cylinder jacket can also be from the outside, for example be heated inductively or by means of IR radiation.
  • the cylinder jacket is constructed with multiple shells. To this In this way, the heat can be concentrated on the outside and stored there become.
  • a multi-layer structure of Advantage that no material stresses occur due to the heating Cause problems.
  • a thing Endless belt is preferably made of metal and has a smooth Surface for the material web.
  • the metal band can only outside of the area where it is wrapped in the material web will be heated. This is dashed in FIG. 1 heater shown 34 indicated.
  • the drying capacity one or more drying or nozzle hoods be arranged on the cylinder 14.
  • hoods that also known as impingement hoods or impingement boxes, can the material web with a hot fluid, for example with Hot air or superheated steam.
  • Fig. 2 shows an embodiment of the invention in which the heated surface 11 is formed by the outside of an endless belt 24 which is on rotates two guide rollers or guide rollers 22.
  • the distance between the two pulleys 22 is chosen such that the length of the heated Area 11 formed heating section essential for the material web is longer than the loop area on the drying cylinders 32 of the multi-cylinder dryer group 30.
  • the endless belt 24 is a metal belt with a smooth surface for the material web.
  • a plurality of heating units 26 are provided for heating the endless belt 24, arranged within the loop formed by the endless belt 24 are and apply heat to the inner surface of the endless belt 24.
  • a metal strip with a low thermal resistance is preferred provided to form the heated surface 11 Outer surface of the endless belt 24 with the lowest possible energy consumption to bring to the required temperature.
  • the Heating elements 26 can be designed in such a way that they can be controlled and / or regulated be that the heat supplied to the endless belt 24 in the running direction of the Material web and / or can be varied transversely to the web running direction.
  • Fig. 2 is used to transport the web of material from the press assembly 20 to the heated surface 11 Transfer felt 27.
  • a suction roller deflecting the transfer felt 27 31, the web of material from the lower press felt 29b of the press assembly 20 removed.
  • a pressure roller 28 serves the material web glue to the heated surface 11.
  • the material web is therefore not passed through a screen belt to the heated surface 11 pressed, but only by sticking to the heated Surface 11 held on the large cylinder 14.
  • the heating units 26 can be operated such that the material web in the area the suction roll 18, i.e. in the acceptance area, by itself from the endless belt 24 releases, making it easier to lose weight.
  • the gap between the press rolls 21 coming material web directly from the lower press felt 29b removed.
  • the material web is pressed using a pressure roller 28 in the area of one of the deflection rollers 22 to that from the outside of the endless belt 24 heated surface 11 glued. Also in this one Variant is thus without a continuous material web to the heated surface 11 pressing screen belt worked.
  • the material web could also - either with a transfer screen or transfer felt according to the embodiment of Fig. 2 or directly with the endless belt 24 according to the variant 3 - removed from the upper press felt 29a of the press assembly 20 become.
  • Impingement hoods or impingement boxes can be provided to the material web additionally with z. B. hot air or steam.
  • the endless belts 24 can also be slightly curved in this way the heating units 26 are guided that a pressure of the material web to the endless belt 24 and a good seal of the heating units 26 is guaranteed. Such a curvature of the endless belts 24 is This is particularly advantageous if, for heating the heating units 26 these are subjected to steam.
  • the heating of the cylinder 14 or the cylinder jacket and the endless belts 24 can be done so unevenly that the Drying is intensified in the direction of web travel, e.g. by for an in Web running direction increasing temperature of heated surface 11 or for an increasing supply of drying energy in the direction of web travel for the heated surface 11 is provided.
  • the invention can be used particularly advantageously in the production of material webs whose basis weight does not fall below about 25 g / cm 2 , preferably writing paper, printing paper and cardboard webs.

Landscapes

  • Paper (AREA)
  • Drying Of Solid Materials (AREA)
EP00116921A 1999-09-15 2000-08-05 Procédé et dispositif pour le séchage d'une bande Withdrawn EP1085122A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944267A DE19944267A1 (de) 1999-09-15 1999-09-15 Verfahren und Vorrichtung zum Trocknen einer Materialbahn
DE19944267 1999-09-15

Publications (2)

Publication Number Publication Date
EP1085122A2 true EP1085122A2 (fr) 2001-03-21
EP1085122A3 EP1085122A3 (fr) 2002-01-09

Family

ID=7922154

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00116921A Withdrawn EP1085122A3 (fr) 1999-09-15 2000-08-05 Procédé et dispositif pour le séchage d'une bande

Country Status (3)

Country Link
US (2) US6482295B1 (fr)
EP (1) EP1085122A3 (fr)
DE (1) DE19944267A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104020319A (zh) * 2014-06-20 2014-09-03 国家电网公司 万用表保护套

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI109713B (fi) * 2001-03-05 2002-09-30 Metso Paper Automation Oy Menetelmä ja laite telan lämmittämiseksi
FI121081B (fi) * 2002-01-08 2010-06-30 Metso Paper Automation Oy Menetelmä ja laitteisto paperikoneen tai paperirainan jälkikäsittelylaitteen yhteydessä
CN107830715A (zh) * 2017-09-06 2018-03-23 惠州市熊宝科技有限公司 布匹烘干设备
CN111829314A (zh) * 2020-07-03 2020-10-27 浙江工业职业技术学院 一种便于移动的烘干装置
CN111829313A (zh) * 2020-07-03 2020-10-27 浙江工业职业技术学院 一种烘干装置
CN111895760A (zh) * 2020-07-03 2020-11-06 浙江工业职业技术学院 一种布料烘干装置

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149025A (en) * 1964-09-15 Manufacture of cellulosic product
GB1153681A (en) * 1965-06-03 1969-05-29 John Peter Hindley Improvements in or relating to Paper-Making Machines
DE6609043U (de) * 1967-04-13 1972-02-10 Thorey Helmut Vorrichtung zum vorfixieren synthetischer textiler rohware.
US4467529A (en) * 1972-06-16 1984-08-28 Candor Electrostatic method and apparatus for treating material
US3981084A (en) * 1972-06-19 1976-09-21 Fort Howard Paper Company Closed draw transfer system with gaseous pressure direction of web
DE2338922A1 (de) * 1973-08-01 1975-02-20 Voith Gmbh J M Trockenzylinder fuer dampfbeheizung
US4361466A (en) * 1977-10-27 1982-11-30 Beloit Corporation Air impingement web drying method and apparatus
US4359827B1 (en) * 1979-11-05 1994-03-29 Keith V Thomas High speed paper drying
FI61537C (fi) * 1981-02-19 1982-08-10 Tampella Oy Ab Foerfarande och anlaeggning foer kontinuerlig torkning av en pappers- eller liknande poroes bana
FI87669C (fi) * 1992-03-02 1993-02-10 Valmet Paper Machinery Inc Foerfarande och tork vid torkning av papper
US6004430A (en) * 1995-10-04 1999-12-21 Ilvespaa; Heikki Method and device for enhancing the run of a paper web in a paper machine
DE19723532A1 (de) * 1997-06-05 1998-12-10 Voith Sulzer Papiermasch Gmbh Beheizter Trockenzylinder
DE19755510A1 (de) * 1997-12-13 1999-06-17 Voith Sulzer Papiertech Patent Trockengruppe
DE19816931C2 (de) * 1998-04-16 2001-12-13 Bhs Corr Masch & Anlagenbau Heizvorrichtung für eine bewegte Materialbahn, insbesondere Vorheizer für eine Wellpappenanlage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104020319A (zh) * 2014-06-20 2014-09-03 国家电网公司 万用表保护套
CN104020319B (zh) * 2014-06-20 2017-06-06 国家电网公司 万用表保护套

Also Published As

Publication number Publication date
US6916405B2 (en) 2005-07-12
US6482295B1 (en) 2002-11-19
EP1085122A3 (fr) 2002-01-09
DE19944267A1 (de) 2001-03-22
US20030024133A1 (en) 2003-02-06

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