EP1300510A2 - Systéme de guidage de bande - Google Patents

Systéme de guidage de bande Download PDF

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Publication number
EP1300510A2
EP1300510A2 EP02015256A EP02015256A EP1300510A2 EP 1300510 A2 EP1300510 A2 EP 1300510A2 EP 02015256 A EP02015256 A EP 02015256A EP 02015256 A EP02015256 A EP 02015256A EP 1300510 A2 EP1300510 A2 EP 1300510A2
Authority
EP
European Patent Office
Prior art keywords
fibrous web
web
guide
roller
drying
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Withdrawn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
EP02015256A
Other languages
German (de)
English (en)
Other versions
EP1300510A3 (fr
Inventor
Anton Zembrot
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 EP1300510A2 publication Critical patent/EP1300510A2/fr
Publication of EP1300510A3 publication Critical patent/EP1300510A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine
    • 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

Definitions

  • the invention relates to a device for taking over and guiding a paper, Cardboard, tissue or other fibrous web by means of an endless circulating, air-permeable belt in a machine for manufacturing and / or Refinement of the fibrous web, the tape in the takeover area Removal roller wraps around and the belt together with the fibrous web takeover wraps around at least one rotating cylinder.
  • the object of the invention is therefore to avoid the web guidance to improve the disadvantages mentioned with relatively simple means and if possible also to increase the dry content of the fibrous web.
  • the object was achieved in that at least one Section of the guide area between the take-off roller and the cylinder of at least one blow box of warm, dry air against the free surface of the Fiber web is blown.
  • the blowing air counteracts the detachment of the fibrous web from the belt. Moreover the warm and dry blown air already dries the fibrous web. The warm blown air not only flows out of the surface of the fibrous web Machine but also diffuses through the fibrous web and the air permeable Belt (flow drying). Because of the improved web guidance and already drying of the fibrous web used is also the required web tension the transfer of the fibrous web much less than usual, so that the Reduced risk of tearing and tearing in the fibrous web.
  • the belt should support the web guiding and the through-flow drying at least in a section of the guide area on the fibrous web opposite side are sucked by at least one guide device.
  • the guide device should be arranged opposite the blow box. Suction boxes with a vacuum source are suitable as a guide device are connected, but also those that use blown air according to the injector principle Generate negative pressure. But also transfer foils in the form of several, across Stripes arranged in the direction of web travel, the surface of which aligns with the tape Forming gap opening web direction are suitable for generating negative pressure.
  • the temperature and / or the amount of blown air can preferably be controlled separately. This allows it especially the middle area of the fibrous web with the blow box with a to blow a larger amount of and / or a more heated blowing air.
  • the ones from Air flowing in the middle area to the sides of the fibrous web ensures a uniform web guidance. Due to higher blowing air temperatures in the middle Area, the drying of the same can be increased and thus often in the Drying process of such machines observed overdrying of the Edges of the fibrous web are counteracted. The result is one Uniformization and intensification of drying of the fibrous web.
  • the zonal Control also allows the edges of the fibrous web to move towards damp edges Act.
  • blow box only extends over the extends middle region of the fibrous web.
  • Blowing air flowing on the side of the fibrous web has sufficient adhesion of the Fiber web on the belt. This solution is particularly suitable for cases in which over-drying of the edges of the fibrous web must be expected.
  • the take-off roller as a vacuumed roller should preferably be perforated Roll jacket are executed.
  • the blow box is replaced by a Blowing of the fibrous web in the transfer area the takeover by the belt supported, but are also normal, i.e. smooth guide rollers with closed Surface can be used.
  • This device is suitable for press sections, the belt being a press felt following press nip for dewatering the fibrous web and the wrapped Cylinder is preferably formed by a press roll of the press nip. there the warm blown air heats up the fibrous web, causing the Dewatering performance in the following press nip by changing the viscosity of the water increases.
  • the device is particularly suitable for dryer sections, with the belt from a dryer fabric of a following dryer group for drying the fibrous web is formed.
  • the drying group should be the first drying group of a preferably represent a drying section following a press nip, since the Fibrous web in this area is still relatively moist and therefore prone to tears and it’s too stretchy.
  • the wrapped preferably temperature-controlled cylinder should be formed by a heated and / or cooled drying cylinder coming into contact with the fibrous web.
  • the dryer group consists of several, preferably arranged in a row, spaced apart, heated, and wrapped by the fibrous web drying cylinders.
  • the fibrous web between the drying cylinders, supported by the belt, should preferably wrap around a guide roller, the belt being in contact with the guide roller and the guide roller being vacuumed.
  • the area between the drying cylinders and the guide roller should be sucked at least partially on the side facing away from the fibrous web by a guide box.
  • the safe detachment of the fibrous web from the drying cylinder is particularly critical here, which is why the guide box should have a separately controllable suction zone in the region of detaching the fibrous web from the drying cylinder, the negative pressure in the detaching region preferably being higher than in the following region.
  • the Fibrous web 1 After passing through a press section, not shown, for dewatering the Fibrous web 1 passes from a delivery belt 12 in the form of a Transfer belt or a press felt supported to the transfer area of the following endlessly circulating volume 2.
  • the press section is formed by one, but usually several press nips, due to the at least one press felt for receiving, dispensing in addition to the fibrous web 1 and runs to remove the squeezed water.
  • the press column in turn are formed by two rotating press rolls.
  • the receiving band 2 is here as an endlessly circulating, air and water-permeable dryer fabric of the first dryer group of a subsequent one Drying section designed for drying the fibrous web 1.
  • the dry group consists of several, arranged in a row next to each other and from each other spaced drying cylinders 8 and between the drying cylinders 8 existing, suctioned guide rollers 9.
  • the fibrous web runs in the dryer group 1 supported by the belt 2 meandering around the heated drying cylinders 8 and sucked guide rollers 9, the fibrous web 1 for heating with the Drying cylinders 8 comes into direct contact.
  • the takeover of the fibrous web 1 from the discharge belt 12 is from one of assuming belt 2 wrapped and vacuumed guide roller 3 supported.
  • the take-off roller 3 has a perforated roller shell, the Interior is connected to a vacuum source.
  • the fibrous web 1 In the management area between Removal roller 3 and cylinder 4 adheres the fibrous web 1 to the underside of the Dryer sieve, which makes guidance difficult. Therefore is in the management area on the side of the band 2 opposite the fibrous web 1 Guide device 6 in the form of a suction box.
  • the negative pressure of this Guide device 6 increases the adhesion of the fibrous web 1 to the belt 2 considerably.
  • the fibrous web 1 is at least partially covered in the guide area blow a blow box 5 with warm, dry air, the temperature of which the fibrous web 1 is.
  • the temperature difference between blown air and Fibrous web 1 should be in the range between 3 and 8 ° C, preferably between 3 and 5 ° C.
  • this blowing air presses the fibrous web 1 against the belt 2 and on the other hand also leads to the drying of the fibrous web 1.
  • the blown air flows doing z. T. to the sides of the fibrous web 1 and partially through the fibrous web 1 and the dryer fabric for the guide device 6.
  • the blow box 5 extends over the entire width of the fibrous web 1 and is divided into several, separately controllable zones transversely to the web running direction 7. This allows in particular the central region of the fibrous web 1 with a to blow hotter and larger amount of air.
  • the train required for the safe transfer and guidance of the fibrous web 1 be significantly reduced, which is gentle on the fibrous web 1 and especially at Fibrous webs 1 with a high moisture content and / or low basis weight of Advantage is.

Landscapes

  • Paper (AREA)
  • Replacement Of Web Rolls (AREA)
EP02015256A 2001-10-08 2002-07-09 Systéme de guidage de bande Withdrawn EP1300510A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001149563 DE10149563A1 (de) 2001-10-08 2001-10-08 Bahnführung
DE10149563 2001-10-08

Publications (2)

Publication Number Publication Date
EP1300510A2 true EP1300510A2 (fr) 2003-04-09
EP1300510A3 EP1300510A3 (fr) 2004-01-07

Family

ID=7701779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02015256A Withdrawn EP1300510A3 (fr) 2001-10-08 2002-07-09 Systéme de guidage de bande

Country Status (2)

Country Link
EP (1) EP1300510A3 (fr)
DE (1) DE10149563A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009092485A1 (fr) * 2008-01-23 2009-07-30 Voith Patent Gmbh Train de séchage
CN113697565A (zh) * 2021-08-18 2021-11-26 安徽腾耀机电科技有限公司 一种用于烟草加工的稳纸装置及其使用方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629056A (en) * 1969-04-03 1971-12-21 Beloit Corp Apparatus for forming high bulk tissue having a pattern imprinted thereon
US5865955A (en) * 1995-04-10 1999-02-02 Valmet Corporation Method and device for enhancing the run of a paper web in a paper machine
WO1999032714A1 (fr) * 1997-12-18 1999-07-01 Valmet Corporation Procede et appareil de sechage d'une bande continue de papier
WO2001040573A1 (fr) * 1999-12-02 2001-06-07 Metso Paper, Inc Procede de soutien d'une bande et dispositif support a cet effet

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE374150B (fr) * 1970-03-17 1975-02-24 Ahlstroem Oy

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629056A (en) * 1969-04-03 1971-12-21 Beloit Corp Apparatus for forming high bulk tissue having a pattern imprinted thereon
US5865955A (en) * 1995-04-10 1999-02-02 Valmet Corporation Method and device for enhancing the run of a paper web in a paper machine
WO1999032714A1 (fr) * 1997-12-18 1999-07-01 Valmet Corporation Procede et appareil de sechage d'une bande continue de papier
WO2001040573A1 (fr) * 1999-12-02 2001-06-07 Metso Paper, Inc Procede de soutien d'une bande et dispositif support a cet effet

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009092485A1 (fr) * 2008-01-23 2009-07-30 Voith Patent Gmbh Train de séchage
CN113697565A (zh) * 2021-08-18 2021-11-26 安徽腾耀机电科技有限公司 一种用于烟草加工的稳纸装置及其使用方法
CN113697565B (zh) * 2021-08-18 2023-06-23 安徽腾耀机电科技有限公司 一种用于烟草加工的稳纸装置及其使用方法

Also Published As

Publication number Publication date
DE10149563A1 (de) 2003-04-10
EP1300510A3 (fr) 2004-01-07

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