EP3464716A1 - Maschine zur entwässerung und trocknung einer faserstoffbahn - Google Patents
Maschine zur entwässerung und trocknung einer faserstoffbahnInfo
- Publication number
- EP3464716A1 EP3464716A1 EP17725974.4A EP17725974A EP3464716A1 EP 3464716 A1 EP3464716 A1 EP 3464716A1 EP 17725974 A EP17725974 A EP 17725974A EP 3464716 A1 EP3464716 A1 EP 3464716A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fibrous web
- belt
- drying
- press
- machine
- 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
- 238000001035 drying Methods 0.000 title claims abstract description 46
- 239000010893 paper waste Substances 0.000 claims abstract description 5
- 239000004744 fabric Substances 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 4
- 239000000725 suspension Substances 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/04—Arrangements thereof
- D21F3/045—Arrangements thereof including at least one extended press nip
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/32—Washing wire-cloths or felts
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
- D21F1/74—Pulp catching, de-watering, or recovering; Re-use of pulp-water using cylinders
- D21F1/76—Pulp catching, de-watering, or recovering; Re-use of pulp-water using cylinders with suction
-
- 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
- D21F7/00—Other details of machines for making continuous webs of paper
- D21F7/04—Paper-break control devices
Definitions
- the invention relates to a machine for dewatering and drying a paper, cardboard or other fibrous web, which is fed to a pulp suspension formed at least partially from waste paper, with at least two press nips, which are formed by two compressed press rolls, wherein the fibrous web with both sides one water-absorbing dewatering band runs through the first and at least one other dewatering belt through the second press nip, and a smooth impermeable transfer belt is passed through the second press nip on the side of the fibrous web opposite the other dewatering belt, which passes the fibrous web to a belt after the second press nip passes the following machine unit.
- the fibrous webs produced therefrom lead to a greater contamination of the elements coming into contact therewith, especially if these elements have a relatively high adhesion, in particular a smooth surface.
- the two press nips often have two separate dewatering belts, so that the fibrous web can be safely guided between the two.
- this is then also associated with a high rewetting of the fibrous web after the press nip.
- the problem here is the transfer of the fibrous web by means of open train, especially at high machine speeds and the costly transfer.
- the object of the invention is therefore to simplify the transfer at as intensive as possible dewatering of the fibrous web, secure web run and the lowest possible rewet.
- the object is achieved in that the transfer belt passes under the fibrous web, the receiving belt is a dryer and the following machine unit is a dryer group in which the fibrous web is meandering, alternately heated by heated drying cylinders and suctioned guide rollers and one, preferably the first drying cylinder at least one pick-up scraper is associated with the following drying group, there being a pulper under the pick-up scraper and the axis of the drying cylinder with the pick-up scraper and the axis of the following swept guide roll being vertically offset from each other and spaced horizontally apart; which is greater than 80% of the sum of the radii of this drying cylinder and this guide roll.
- the fibrous web is constantly guided by at least one band in the press section, the web guide is very stable even at high machine speeds.
- the transfer can be done web width through the press section at least to the first drying cylinder of the following drying group, which also makes this very safe.
- a transfer only to the end of the press section is problematic because the decrease in the fibrous web from the transfer belt by means of removal scraper can easily cause damage to the transfer belt because of the required contact pressure.
- the fibrous web adheres to the smooth transfer belt, so that the opposite relatively rough dewatering belt can be carried away immediately, at most 200 mm after this press nip without problems and a rewet is prevented.
- the transfer belt then guides the web safely to the belt of the following machine unit. Subsequently, the transfer belt is cleaned by a cleaning device which directs a cleaning fluid with a pressure of at least 50 bar on the fibrous web-carrying side and at least one, subsequent scraper comprises.
- the cleaning device even directs the cleaning fluid with a pressure of at least 100 bar, preferably at least 120 bar on the fibrous web leading side of the transfer belt.
- the transfer belt should be supported in the area of the cleaning device on at least one guide roller.
- the extended press nip is formed by a cylindrical press roll and a shoe press roll, which has a flexible roll shell, which is pressed by a pressure shoe with concave pressing surface to the cylindrical roll.
- the extended press nip extends at least over 250 mm in the machine direction and / or has a line force of at least 800 kN / m.
- the transfer belt should run below the fibrous web. This results in a sufficient adhesion of the fibrous web to the transfer belt, if this on the fibrous web leading side has a roughness R z in the machine direction of less than 12, preferably less than 10 and in particular less than 8 ⁇ .
- the distance between the second press nip and the delivery of the fibrous web to the receiving band should be shorter than 2.5 m, preferably shorter than 2 m and in particular shorter than 1.5 m.
- the fibrous web is guided at least before the first, preferably before each press nip over the longest possible guide distance of both bands of the respective press nip.
- the upper dewatering belt of the first press nip should be led away from the fibrous web during aspiration of the lower dewatering belt.
- the figure shows a schematic cross section through part of a paper machine with press section and the following drying group for the production of packaging papers with a basis weight between 50 and 120 g / m 2 of a pulp suspension formed at least partially from waste paper.
- the illustrated press section comprises two press nips 2, 3, which are formed by two compressed press rolls 4, 5, 6, 7, respectively.
- the separate ones Press roller pairs are thereby supported at the ends of support parts in the form of a foundation, which is supported on the machine foundation.
- press gaps 2, 3 are each formed by a cylindrical press roll 5, 7 and a shoe press roll 4, 6.
- the shoe press rolls 4, 6 have a flexible roll shell, which is pressed by a contact shoe with a concave pressing surface to the cylindrical press roll 5, 7.
- the aim is a length of the press nip 2,3 in the machine direction 16 of at least 250 mm and a line force of at least 800 kN / m.
- the fibrous web 1 runs on both sides with a respective dewatering belt 8, 9.
- the fibrous web 1 is guided by an upper dewatering belt 10 and a lower, smooth and impermeable transfer belt 11 through the second press nip 3.
- the dewatering belts 8,9,10 are designed as water-absorbing press felts.
- the upper dewatering belt 8 of the first press nip 2 takes over the fibrous web 1 from a forming wire 17 of an upstream former for sheet formation. Subsequently, the lower dewatering belt 9 is brought into contact with the fibrous web 1 so that the fibrous web 1 is guided in front of the first press nip 2 over as long a guide path as possible from both belts 8, 9 of the press nip 2.
- the fibrous web 1 runs together with both dewatering belts 8, 9 before the upper dewatering belt 8 is led away.
- the lower dewatering belt 9 is sucked in this area by a suction box 18 arranged underneath.
- the fibrous web 1 is then transferred to the other, upper dewatering belt 10 of the second press nip 3.
- the (other) upper dewatering belt 10 is led away from the fibrous web 1 after a maximum of 200 mm, which reduces the risk of rewet, in particular at low basis weights.
- the lower transfer belt 1 1 leads the fibrous web 1 until it is transferred to a belt 12, here a drying wire of a following drying group with only three drying cylinders 19 a drying section for drying the fibrous web 1, alone.
- the fibrous web 1 is supported by the dryer fabric, meandering alternately over heated drying cylinders 19 and evacuated guide rollers 20 out.
- the first drying cylinder 19 of the following drying group is associated with a removal scraper 24. This separates the fibrous web 1 during transfer from the drying cylinder 19 and then passes this into a pulper 23 located underneath.
- the axis of the first drying cylinder 19 with the removal scraper 24 and the axis of the following, evacuated guide roll 20 are vertically offset from one another.
- these axes have a horizontal distance 22 from each other, which is greater than 95% of the sum of the two radii of this drying cylinder 19 and this guide roller 20 here.
- the upper dewatering belts 8, 10 and the drying wire each wrap around an evacuated guide roller 21 during the takeover of the fibrous web 1.
- the transfer belt 1 1 is cleaned intensively after the delivery of the fibrous web 1 by a cleaning device 13.
- This cleaning device 13 directs a cleaning fluid, here water at a pressure of at least 100 bar on the fibrous web-carrying side of the transfer belt 1 first Thereafter, the dissolved impurities are removed from a subsequent scraper 14 from the transfer belt 1 1.
- a cleaning fluid here water at a pressure of at least 100 bar
- the transfer belt 1 1 is supported in the region of the cleaning device 13 and the scraper 14 on at least one guide roller 15.
Landscapes
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016209780.6A DE102016209780A1 (de) | 2016-06-03 | 2016-06-03 | Pressenpartie |
PCT/EP2017/062865 WO2017207475A1 (de) | 2016-06-03 | 2017-05-29 | Maschine zur entwässerung und trocknung einer faserstoffbahn |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3464716A1 true EP3464716A1 (de) | 2019-04-10 |
EP3464716B1 EP3464716B1 (de) | 2020-02-12 |
Family
ID=58772913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17725974.4A Active EP3464716B1 (de) | 2016-06-03 | 2017-05-29 | Maschine zur entwässerung und trocknung einer faserstoffbahn |
Country Status (5)
Country | Link |
---|---|
US (1) | US11286617B2 (de) |
EP (1) | EP3464716B1 (de) |
CN (1) | CN109563683B (de) |
DE (1) | DE102016209780A1 (de) |
WO (1) | WO2017207475A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016042198A1 (en) * | 2014-09-15 | 2016-03-24 | Upm-Kymmene Corporation | Process to manufacture low weight high quality paper for use as a support layer of a release! liner with a belt assembly |
DE102018119381A1 (de) * | 2018-08-09 | 2020-02-13 | Voith Patent Gmbh | Pressanordnung |
DE102019116602A1 (de) * | 2019-06-19 | 2020-12-24 | Voith Patent Gmbh | Maschine zur herstellung einer faserstoffbahn |
DE102023108253A1 (de) | 2023-03-31 | 2024-10-02 | Voith Patent Gmbh | Pressenanordnung und Verfahren zum Pressen einer Faserstoffbahn |
DE102023108255A1 (de) | 2023-03-31 | 2024-10-02 | Voith Patent Gmbh | Pressenanordnung und Verfahren zum Pressen einer Faserstoffbahn |
DE102023108256A1 (de) | 2023-03-31 | 2024-10-02 | Voith Patent Gmbh | Pressenanordnung und Verfahren zum Pressen einer Faserstoffbahn |
DE102023108252A1 (de) | 2023-03-31 | 2024-10-02 | Voith Patent Gmbh | Maschine und Verfahren |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4483745A (en) * | 1982-09-29 | 1984-11-20 | Beloit Corporation | Method and apparatus of sheet transfer using a nonporous smooth surfaced belt |
CN1028252C (zh) * | 1991-02-13 | 1995-04-19 | 美商贝洛特公司 | 造纸设备、制造方法及制成的纸幅 |
DE4112355A1 (de) * | 1991-04-16 | 1992-10-22 | Escher Wyss Gmbh | Pressenpartie einer papiermaschine |
US6368466B1 (en) * | 1993-12-08 | 2002-04-09 | Valmet Corporation | Press section of a paper making machine employing an extended nip press |
FI107059B (fi) * | 1998-07-01 | 2001-05-31 | Metso Paper Inc | Paperikoneen formeri-puristinosa ja menetelmä rainan siirtämiseksi formerilta puristinosalle |
FI104644B (fi) * | 1998-08-17 | 2000-03-15 | Valmet Corp | Menetelmä ja laite paperikoneella rainan siirtämiseksi formeriosalta puristinosalle |
DE10134233A1 (de) * | 2001-07-13 | 2003-01-23 | Voith Paper Patent Gmbh | Verfahren zum Betreiben einer der Herstellung einer Faserstoffbahn dienenden Maschine sowie Maschine zur Herstellung einer Faserstoffbahn |
JP3691031B2 (ja) * | 2002-07-19 | 2005-08-31 | 三菱重工業株式会社 | 抄紙機の制御方法 |
DE102005001890A1 (de) * | 2005-01-15 | 2006-07-20 | Voith Paper Patent Gmbh | Pressanordnung |
FI119069B (fi) * | 2005-02-23 | 2008-07-15 | Metso Paper Inc | Järjestely rainanmuodostuskoneen puristinosalla |
DE102005041476A1 (de) * | 2005-09-01 | 2007-03-15 | Voith Patent Gmbh | Pressanordnung |
DE102005050281A1 (de) * | 2005-10-20 | 2007-04-26 | Voith Patent Gmbh | Pressanordnung |
DE102005052859A1 (de) * | 2005-11-07 | 2007-05-10 | Voith Patent Gmbh | Reinigungsvorrichtung |
DE102007007173A1 (de) * | 2007-02-09 | 2008-08-14 | Voith Patent Gmbh | Verfahren und Vorrichtung zum Überführen einer Materialbahn, insbesondere Papierbahn, von einer Pressenpartie zu einer Trockenpartie |
AT508331B1 (de) * | 2009-05-19 | 2011-05-15 | Andritz Ag Maschf | Verfahren und vorrichtung zur behandlung einer faserstoffbahn in einer langnip-presseinheit |
CN102666982B (zh) * | 2009-12-22 | 2016-03-09 | 梅特索纸业有限公司 | 排气模块、供气模块、输送纤维纸幅的系统、干端及方法 |
WO2016083171A1 (de) * | 2014-11-28 | 2016-06-02 | Voith Patent Gmbh | Vorrichtung zur herstellung einer faserstoffbahn |
-
2016
- 2016-06-03 DE DE102016209780.6A patent/DE102016209780A1/de not_active Withdrawn
-
2017
- 2017-05-29 WO PCT/EP2017/062865 patent/WO2017207475A1/de unknown
- 2017-05-29 CN CN201780034291.8A patent/CN109563683B/zh active Active
- 2017-05-29 EP EP17725974.4A patent/EP3464716B1/de active Active
-
2018
- 2018-12-03 US US16/207,902 patent/US11286617B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN109563683B (zh) | 2021-03-09 |
CN109563683A (zh) | 2019-04-02 |
US20190100876A1 (en) | 2019-04-04 |
DE102016209780A1 (de) | 2017-12-07 |
WO2017207475A1 (de) | 2017-12-07 |
EP3464716B1 (de) | 2020-02-12 |
US11286617B2 (en) | 2022-03-29 |
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