EP1347096A2 - Procédé pour sécher des bandes de papier, en particulier des bandes de papier tissu - Google Patents

Procédé pour sécher des bandes de papier, en particulier des bandes de papier tissu Download PDF

Info

Publication number
EP1347096A2
EP1347096A2 EP03005020A EP03005020A EP1347096A2 EP 1347096 A2 EP1347096 A2 EP 1347096A2 EP 03005020 A EP03005020 A EP 03005020A EP 03005020 A EP03005020 A EP 03005020A EP 1347096 A2 EP1347096 A2 EP 1347096A2
Authority
EP
European Patent Office
Prior art keywords
hood
drying
cylinder
basket
paper webs
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
EP03005020A
Other languages
German (de)
English (en)
Other versions
EP1347096B1 (fr
EP1347096A3 (fr
Inventor
Wolfgang Ing. Promitzer
Johann Hiebaum
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.)
Andritz AG
Original Assignee
Andritz AG
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 Andritz AG filed Critical Andritz AG
Priority to AT03005020T priority Critical patent/ATE438759T1/de
Publication of EP1347096A2 publication Critical patent/EP1347096A2/fr
Publication of EP1347096A3 publication Critical patent/EP1347096A3/fr
Application granted granted Critical
Publication of EP1347096B1 publication Critical patent/EP1347096B1/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
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/18—Drying webs by hot air
    • D21F5/181—Drying webs by hot air on Yankee cylinder
    • 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
    • D21F5/044—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices using air hoods over the cylinders

Definitions

  • the invention relates to a device for drying paper webs, in particular tissue paper webs, with a drying cylinder and a drying hood for inflating hot air.
  • a drying cylinder and a drying hood for inflating hot air are also called Yankee cylinders and Yankee hoods and have long been used in the field of tissue paper production.
  • high blow-out temperatures of the hot air are required.
  • drying hoods with temperatures up to approx. 500 ° C are in use, whereby there are restrictions mainly due to the material.
  • the aim of the invention is therefore to provide a device for the efficient, uniform drying of a paper web, in particular tissue paper web, at high temperatures.
  • the supply air parts of the drying hood such as the nozzle basket or supply air duct
  • the nozzle cage is rotatably mounted in an upper point in the housing, the nozzle cage can move freely during heating or cooling without generating any tension.
  • the nozzle cage is slidably mounted in a lower point in the hood frame, and the lower (support) point can be adjustable, a uniform, possibly also adjustable, distance between cylinder and hood can always be achieved.
  • the housing and the nozzle basket are advantageously fixed transversely to the paper web on different sides (drive side or driver side), the expansion transversely to the paper web can be minimized.
  • a drive unit and a distance sensor are provided according to the invention. It is particularly advantageous if the distance between the drying hood and drying cylinder is essentially the same everywhere during operation at high blow-out temperatures, in particular above 550 ° C., for example up to 700 ° C.
  • FIG. 1 shows schematically the structure of a dryer with a drying cylinder and drying hood
  • FIG. 2 shows a hood half when cold
  • FIG. 3 shows a hood half analogously to FIG. 2, but with a warm nozzle basket
  • FIG. 4 shows an analog view with a warm nozzle basket and a warm hood frame
  • FIG. 5 shows the area of a support of the hood
  • FIG. 6 shows the area of a further support of the hood.
  • Fig. 1 shows the schematic structure of a drying plant for paper, in particular tissue paper. The paper web is guided around a drying cylinder 1, which is wrapped by a first hood half 2 and a second hood half 3.
  • Hot air is blown onto the paper from a line 4, 4 '.
  • the cooled air is discharged via a line 5, 5 '.
  • the hot air temperatures today are around 300 ° C to 500 ° C, resulting in water evaporation of approx. 90 kg w / m 2 h or 160 kg w / m 2 h.
  • the aim is to increase the blow-out temperature to 600 ° C or 700 ° C, which results in water evaporation rates of over 200 kg w / m 2 h.
  • the thermal expansion of the hood leads to unwanted geometric relationships.
  • the gap between the drying cylinder 1 and the hood 2, 3 changes such that larger gaps are formed at the lower end, while the hood parts 2, 3 can grind on the cylinder 1 at the upper end and thus damage both the paper web and the cylinder 1.
  • Fig. 2 the second hood half 3 of a drying system is shown.
  • the hot air supply 4 and the exhaust air line 5 can be seen.
  • the hot air line 4 opens into the nozzle basket 9 and flows through a series of nozzles onto the paper running on the drying cylinder 1.
  • the hood frame 10 is located around the nozzle basket 9. When the nozzle basket 9 and the hood frame 10 are cold, there is a smaller distance at the hood apex 11 than at the hood end 12 in order to achieve the best possible hood distance from the cylinder in the operating state.
  • the thermal expansion is shown in FIG. 3, with the nozzle cage 9 first being heated to approximately 600-700 ° C. during the starting process.
  • the upper limit is only the material properties of the sheets used.
  • the nozzle basket 9 and hood frame 10 are decoupled from one another according to the invention.
  • the nozzle basket 9 is now rotatably supported in the area of the apex 11 in a bearing 13 on the main support of the hood frame 10. In the lower hood area, the nozzle basket 9 slidably rests on a further carrier 14.
  • Fig. 4 shows the state in which the hood frame 10 is also heated.
  • the upper bearing 13 is moved in the direction of arrow 18, ie towards the other half of the hood. This increases the distance between the hood and the cylinder again.
  • the entire hood half 3 is shifted in the direction 18 ', so that the distance decreases again here.
  • the slide bearing 14 is arranged in a slot 19 so as to be displaceable and adjustable.
  • FIG. 5 shows the setting option in more detail, with different positions, which result in particular from the thermal expansion, being shown.
  • the solid lines represent the state at operating temperature and the dashed lines in the cold state.
  • the lower bearing 14 of the nozzle basket 9, which is designed to slide, can be seen particularly well in this figure, the bearing point in the hood frame 10 being displaced or slid in a slot 19 is adjustable.
  • Fig. 6 shows the displacement of the upper bearing 13 by the expansion of the hood frame 10 and displacement towards the center of the cylinder. The hood frame 10 then pulls the nozzle basket 9 along with the rotatable joint 13. This construction compensates for the two opposite expansions.
  • Stainless steel (1.4571) or Corten A is usually used as the material for the frame.
  • Stainless steel (1.4571) or Corten A is usually used as the material for the frame.
  • a material is used that has sufficient strength even at high temperatures, such as. B. 1.4835.
  • the hood frame 10 is fixed on the drive side of the paper machine and the nozzle basket 9 on the driver side of the machine. Here too, the expansion is minimized by the different locations of the fixation.

Landscapes

  • Paper (AREA)
  • Drying Of Solid Materials (AREA)
EP03005020A 2002-03-19 2003-03-06 Dispositif pour sécher des bandes de papier, en particulier des bandes de papier tissu Expired - Lifetime EP1347096B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT03005020T ATE438759T1 (de) 2002-03-19 2003-03-06 Vorrichtung zum trocknen von papierbahnen, insbesondere tissuepapierbahnen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0041102A AT411274B (de) 2002-03-19 2002-03-19 Vorrichtung zum trocknen von papierbahnen, insbesondere tissuepapierbahnen
AT4112002 2002-03-19

Publications (3)

Publication Number Publication Date
EP1347096A2 true EP1347096A2 (fr) 2003-09-24
EP1347096A3 EP1347096A3 (fr) 2005-07-13
EP1347096B1 EP1347096B1 (fr) 2009-08-05

Family

ID=3673766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03005020A Expired - Lifetime EP1347096B1 (fr) 2002-03-19 2003-03-06 Dispositif pour sécher des bandes de papier, en particulier des bandes de papier tissu

Country Status (7)

Country Link
US (1) US7363725B2 (fr)
EP (1) EP1347096B1 (fr)
AT (2) AT411274B (fr)
CA (1) CA2420798C (fr)
DE (1) DE50311768D1 (fr)
ES (1) ES2329884T3 (fr)
MX (1) MXPA03002427A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014029719A1 (fr) * 2012-08-20 2014-02-27 Voith Patent Gmbh Hotte de séchage
WO2018149722A1 (fr) * 2017-02-20 2018-08-23 Voith Patent Gmbh Hotte de séchage, ensemble de séchage et utilisation de celui-ci

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITFI20130241A1 (it) * 2013-10-15 2015-04-16 Celli Paper S P A A "componenti di impianti per la produzione di carta ad umido"
SE547503C2 (en) * 2023-05-31 2025-10-07 Valmet Oy Hood adjustment assembly and method for adjusting a position of a hood on a dryer cylinder

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0905311A2 (fr) 1997-09-24 1999-03-31 Asea Brown Boveri Inc. Hotte à haute temperature pour un sécheur Yankee

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1233585A (fr) * 1958-04-22 1960-10-12 Winterburn Ltd Joseph Perfectionnements aux cylindres sécheurs pour machines telles que les machines à papier
US3163502A (en) * 1960-10-13 1964-12-29 Beloit Corp Removable hood for a drying cylinder
US5410819A (en) * 1994-03-18 1995-05-02 James River Paper Company, Inc. Mounting system for paper dryer nozzle box
US5531033A (en) * 1994-10-18 1996-07-02 Asea Brown Boveri, Inc. Controlled profile drying hood

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0905311A2 (fr) 1997-09-24 1999-03-31 Asea Brown Boveri Inc. Hotte à haute temperature pour un sécheur Yankee

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014029719A1 (fr) * 2012-08-20 2014-02-27 Voith Patent Gmbh Hotte de séchage
WO2018149722A1 (fr) * 2017-02-20 2018-08-23 Voith Patent Gmbh Hotte de séchage, ensemble de séchage et utilisation de celui-ci
US11118310B2 (en) 2017-02-20 2021-09-14 Voith Patent Gmbh Drying hood, drying arrangement and use thereof

Also Published As

Publication number Publication date
EP1347096B1 (fr) 2009-08-05
DE50311768D1 (de) 2009-09-17
CA2420798A1 (fr) 2003-09-19
MXPA03002427A (es) 2004-02-12
CA2420798C (fr) 2011-02-01
ATE438759T1 (de) 2009-08-15
ES2329884T3 (es) 2009-12-02
US20030177660A1 (en) 2003-09-25
ATA4112002A (de) 2003-04-15
EP1347096A3 (fr) 2005-07-13
US7363725B2 (en) 2008-04-29
AT411274B (de) 2003-11-25

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