EP1527232A1 - Trockenpartie - Google Patents
TrockenpartieInfo
- Publication number
- EP1527232A1 EP1527232A1 EP03771111A EP03771111A EP1527232A1 EP 1527232 A1 EP1527232 A1 EP 1527232A1 EP 03771111 A EP03771111 A EP 03771111A EP 03771111 A EP03771111 A EP 03771111A EP 1527232 A1 EP1527232 A1 EP 1527232A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fibrous web
- drying section
- drying
- section according
- 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.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G7/00—Damping 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S162/00—Paper making and fiber liberation
- Y10S162/06—Moisture and basic weight
Definitions
- the invention relates to a dryer section for drying a paper, cardboard, tissue or other fibrous web in a machine for producing and / or finishing the fibrous web, in which the fibrous web is guided by at least one dryer fabric and guided over several heated drying cylinders and guide rollers.
- Such dryer sections have long been used in a variety of forms. This often creates tension in the fibrous web, which leads to an increased tendency to curl. In addition, the wet cross profile of the fibrous web is generally unsatisfactory, since overdrying occurs especially at the edges.
- the object of the invention is to improve the moisture cross profile and the curl of the fibrous web with simple means.
- the object was achieved in that several, preferably two, moistening devices are arranged at different positions in relation to the fibrous web within the dryer section, the amount of liquid applied to the fibrous web at least in one moistening device being separately adjustable in zones transverse to the web running direction.
- At least one, preferably all, of the moistening devices should have a plurality of nozzles arranged next to one another transversely to the web running direction. It is advantageous if the nozzles are at least partially designed as pneumatic atomizing nozzles.
- the moistening devices apply different amounts of liquid to the fibrous web.
- the moistening devices deliver the liquid with different droplet sizes, the mean droplet diameter remaining below a limit value which preferably does not exceed 100 ⁇ m according to Sauter.
- the moistening devices In coordination with the amount of liquid to be applied, the droplet size and the type of parameter to be influenced, the moistening devices should in turn have different nozzle types and / or different spray angles with respect to the fibrous web.
- the number of zones of a humidification device should be selected. One or a few zones are sufficient, in particular, to influence the tendency to curl. To adapt to the characteristic requirements of the fibrous web, it is advantageous if the zones of the moistening devices are of different widths.
- the expected moisture cross profiles depend on the type of fibrous web, i.e. the weight per unit area, the thickness and the width also depend on the type of dryer section.
- the subdivision of the zones can therefore be selected in accordance with the expected moisture cross profile and / or the required curl correction.
- the number of zones should be limited to the amount necessary for this.
- the humidifiers have a different number of zones.
- a low-zone moistening device for example to influence the curl of the fibrous web, between 1 and 25 zones are often sufficient.
- the multi-zone humidifiers have zones with a width between 20 and 150 mm, preferably between 20 and 50 mm.
- the first moistening device in the web running direction should be arranged in an area of the dryer section in which the dry content of the fibrous web is at least 60%, but at least 2% below the dry content that the fibrous web ends up the dryer section has.
- the last moistening device in the web running direction should, in order to be able to influence the curl sufficiently, on the other hand in an area of the dryer section be arranged in which the dry content of the fibrous web is at least 80%.
- the use of the moistening devices in drying groups of the dryer section is advantageous, in which only one side of the fibrous web comes into contact with the drying cylinders.
- the arrangement of the moistening devices in drying sections is particularly suitable, in which the fibrous web between the drying cylinders of a drying group of the drying section is guided over suction-guided guide rollers, the drying wire lying between the guide roller and the fibrous web. At least one, preferably all, of the moistening devices should be arranged in the area of a suction-guided guide roller.
- the last moistening device in the web running direction is arranged in the area of the last evacuated guide roller of the dryer section and the first moistening device in the web running direction is arranged in the area of the last suctioned guide roller of the penultimate dryer group of the dryer section.
- the first moistening device in the web running direction is used essentially, preferably exclusively, for correcting the moisture cross profile of the fibrous web and is adjusted accordingly.
- the last moistening device in the web running direction to be used essentially, preferably exclusively, to correct the curling tendency of the fibrous web and to be adjusted accordingly. Because of the improved correction possibilities in this area of the dryer section, in particular with regard to the moisture cross profile, the first moistening device in the web running direction should have more zones than the last one Moistening.
- the last moistening device in the web running direction is used to correct the moisture cross profile and the curl of the fibrous web and is adjusted accordingly.
- the last moistening device in the web running direction should have more zones than the first moistening device in order to influence the parameters of the fibrous web better.
- the use of the moistening devices in dryer sections which lead to an increased curl of the fibrous web, is particularly suitable.
- the arrangement of the moistening devices in such dryer sections is also relatively unproblematic.
- the use of the moistening devices is also advantageous in the case of multilayer fibrous webs or fibrous webs which are treated on one side with substances which influence the surface properties.
- Figure 1 a dryer section with single-tier dryer groups and Figure 2: a dryer section with a double-tier final group.
- the fibrous web 1 passes through a press nip 9 formed by two press rolls for dewatering. Subsequently the fibrous web 1 reaches the drying section, in which the fibrous web 1 is heated and dried by direct contact with heated drying cylinders 2.
- the dryer sections consist of several dryer groups, each dryer group being formed by one or two rows of drying cylinders 2 arranged one above the other. Each row of drying cylinders 2 is assigned a dryer fabric 3 for supporting the fibrous web 1.
- drying takes place on one side, since here only the underside of the fibrous web 1 comes into contact with the drying cylinders 2 arranged in a row. Between the drying cylinders 2, the fibrous web 1 wraps together with the corresponding drying wire 3 in each case a suction guide roll 4, the drying wire 3 lying between the guide roll 4 and the fiber web 1.
- the evacuated guide rollers 4 have a perforated roller jacket, the interior of which is connected to a vacuum source.
- the negative pressure ensures that the fibrous web 1 is sucked towards the drying wire 3 during the wrapping of the guide roller 4.
- moistening devices 5, 6 in the form of nozzle dampers running transversely to the web running direction 10, which have a plurality of pneumatic atomizing nozzles arranged next to one another transversely to the web running direction 10. These moistening devices 5, 6 are arranged opposite the fibrous web 1 and are separated in zones transverse to the web running direction 10 with respect to the amount of liquid applied to the fibrous web 1 controllable.
- the degree of humidification emanating from the zones is set in the form of a control system as a function of the measured moisture cross profile of the fibrous web 1.
- a second moistening device 6 is assigned to the last evacuated guide roller 4. This has only one zone here.
- the dry content of the fibrous web is over 80%.
- the first 4 drying groups each consist of a row of drying cylinders 2 and the last two consist of two rows arranged one above the other.
- first moistening device 5 in the web running direction 10 in the looping area of a suction-guided guide roller 4, since there is a sufficiently high dry content of over 60%.
- this moistening device 5 serves to correct the moisture cross profile of the fibrous web 1.
- a second moistening device 6 can be attached in relation to a suction-guided guide roller 4.
- the dry content of the fibrous web 1 is over 80%.
- This moistening device 6 serves to correct the wet cross profile and to influence the curl of the fibrous web 1 and therefore has more zones than the first moistening device 5.
- Water is generally used for moistening, the droplet size and the spray angle with respect to the fibrous web 1 should be adapted to the circumstances.
Landscapes
- Paper (AREA)
- Treatment Of Fiber Materials (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10233795 | 2002-07-25 | ||
DE10233795A DE10233795A1 (de) | 2002-07-25 | 2002-07-25 | Trockenpartie |
PCT/EP2003/050291 WO2004011722A1 (de) | 2002-07-25 | 2003-07-08 | Trockenpartie |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1527232A1 true EP1527232A1 (de) | 2005-05-04 |
EP1527232B1 EP1527232B1 (de) | 2017-03-22 |
Family
ID=30128360
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03771111.6A Expired - Lifetime EP1527232B1 (de) | 2002-07-25 | 2003-07-08 | Trockenpartie |
Country Status (7)
Country | Link |
---|---|
US (1) | US7459062B2 (de) |
EP (1) | EP1527232B1 (de) |
JP (1) | JP4528618B2 (de) |
CN (1) | CN100352999C (de) |
AU (1) | AU2003254501A1 (de) |
DE (1) | DE10233795A1 (de) |
WO (1) | WO2004011722A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004017809A1 (de) * | 2004-04-13 | 2005-10-27 | Voith Paper Patent Gmbh | Trockenanordnung |
DE102008000288A1 (de) | 2008-02-13 | 2009-08-20 | Voith Patent Gmbh | Verfahren und Vorrichtung zur Steuerung und/oder Regelung der Feuchte einer Materialbahn und Maschine zur Herstellung einer Materialbahn mit einer derartigen Vorrichtung |
US9481777B2 (en) | 2012-03-30 | 2016-11-01 | The Procter & Gamble Company | Method of dewatering in a continuous high internal phase emulsion foam forming process |
US9670616B2 (en) | 2014-12-11 | 2017-06-06 | Georgia-Pacific Consumer Products Lp | Active web spreading and stabilization shower |
DE102021103519A1 (de) * | 2021-02-15 | 2022-08-18 | Koehler Innovation & Technology Gmbh | Verfahren zur Herstellung einer Faserstoffbahn |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE429771B (sv) * | 1978-09-25 | 1983-09-26 | Nordiskafilt Ab | Sett att reglera fuktprofilen hos en fiberbana |
FI72552C (fi) * | 1984-02-08 | 1987-06-08 | Waertsilae Oy Ab | Foerfarande och anordning foer behandling av bana. |
US5065673A (en) * | 1989-09-19 | 1991-11-19 | Measurex Corporation | Cross-directional moisture control system and method |
FI91900C (fi) * | 1990-12-17 | 1994-08-25 | Valmet Paper Machinery Inc | Menetelmä paperikoneen kuivatusosalla paperin käyristymistaipumuksen vähentämiseksi ja menetelmän toteuttamiseen tarkoitettu kuivatusosa |
FI103820B1 (fi) * | 1993-11-30 | 1999-09-30 | Valmet Paper Machinery Inc | Menetelmät paperirainan kuivatuksessa sekä paperikoneen kuivatusosat |
US5632101A (en) * | 1994-09-16 | 1997-05-27 | Voith Sulzer Papiermaschinen Gmbh | All top-felted single-tier drying section with post drying section curl control |
DE9414963U1 (de) * | 1994-09-16 | 1994-11-03 | J.M. Voith Gmbh, 89522 Heidenheim | Trockenpartie |
US5771603A (en) * | 1994-09-16 | 1998-06-30 | Voith Sulzer Papiermashinen Gmbh | Dryer section |
US5592751A (en) * | 1994-11-23 | 1997-01-14 | Voith Sulzer Papiermaschinen Gmbh | Dryer section having combination of single and double tier dryer groups |
DE19627669C2 (de) * | 1996-07-10 | 2001-03-01 | Stora Enso Publication Paper A | Verfahren zur Verbesserung von Druckpapieren |
US6001421A (en) * | 1996-12-03 | 1999-12-14 | Valmet Corporation | Method for drying paper and a dry end of a paper machine |
FI981594A (fi) | 1998-07-10 | 2000-01-11 | Valmet Corp | Menetelmä ja laitteisto rainan kostutuksessa |
DE69915836T2 (de) | 1998-07-10 | 2005-04-21 | Metso Paper Inc | Verfahren und vorrichtung zur herstellung von oberflächenbehandeltem druckpapier |
ES2217781T3 (es) | 1998-07-10 | 2004-11-01 | Metso Paper, Inc. | Metodo de fabricacion de papel calandrado. |
DE19901400A1 (de) * | 1999-01-15 | 2000-07-20 | Voith Sulzer Papiertech Patent | Trocknungs- und Glättungseinheit für Faserstoffbahnen |
DE19921592A1 (de) | 1999-05-07 | 2000-11-09 | Voith Sulzer Papiertech Patent | Applikationsvorrichtung und -verfahren für eine Papiermaschine |
DE10052187B4 (de) | 2000-10-20 | 2013-12-24 | Voith Patent Gmbh | Verfahren zum Glätten einer Materialbahn sowie Kalander zur Durchführung des Verfahrens |
FI109213B (fi) * | 2000-11-24 | 2002-06-14 | Metso Paper Inc | Menetelmä ja laite paperirainan kosteus- tai päällystemääräprofiilin hallitsemiseksi |
US6699365B2 (en) * | 2001-10-22 | 2004-03-02 | Abb Inc. | Method of wetting webs of paper or other hygroscopic material |
-
2002
- 2002-07-25 DE DE10233795A patent/DE10233795A1/de not_active Withdrawn
-
2003
- 2003-07-08 EP EP03771111.6A patent/EP1527232B1/de not_active Expired - Lifetime
- 2003-07-08 JP JP2004523808A patent/JP4528618B2/ja not_active Expired - Fee Related
- 2003-07-08 AU AU2003254501A patent/AU2003254501A1/en not_active Abandoned
- 2003-07-08 WO PCT/EP2003/050291 patent/WO2004011722A1/de active Application Filing
- 2003-07-08 CN CNB038178869A patent/CN100352999C/zh not_active Expired - Lifetime
-
2005
- 2005-01-24 US US11/040,032 patent/US7459062B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2004011722A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20050138837A1 (en) | 2005-06-30 |
JP2005533938A (ja) | 2005-11-10 |
EP1527232B1 (de) | 2017-03-22 |
CN100352999C (zh) | 2007-12-05 |
WO2004011722A1 (de) | 2004-02-05 |
DE10233795A1 (de) | 2004-02-12 |
AU2003254501A1 (en) | 2004-02-16 |
US7459062B2 (en) | 2008-12-02 |
CN1671922A (zh) | 2005-09-21 |
JP4528618B2 (ja) | 2010-08-18 |
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