EP3833816A1 - Pressanordnung - Google Patents
PressanordnungInfo
- Publication number
- EP3833816A1 EP3833816A1 EP19748821.6A EP19748821A EP3833816A1 EP 3833816 A1 EP3833816 A1 EP 3833816A1 EP 19748821 A EP19748821 A EP 19748821A EP 3833816 A1 EP3833816 A1 EP 3833816A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- web
- arrangement according
- extended
- nip
- 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
- 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
- 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 press arrangement for dewatering a paper or cardboard web with a basis weight between 60 and 250 g / m 2 and at a machine speed of up to 1800 m / min consisting of four press rolls to form three press nips, through which the web together with at least one endless, water-absorbing drainage belt runs.
- the fibrous webs produced therefrom lead to greater contamination of the elements coming into contact with them, in particular if these elements have a relatively high adhesion, in particular a smooth surface.
- the press nips often have two separate drainage belts, so that the fibrous web can be safely guided between the two.
- this is also associated with high costs and high rewetting of the fibrous web after the press nips.
- the problem here is the transfer of the fibrous web by means of an open train, particularly at high machine speeds, and the complex transfer.
- the object of the invention is therefore to enable high dry contents with reliable web guidance and the lowest possible costs.
- the fibrous web 1 is transferred from a former 19 of a former former to a water-absorbing, upper dewatering belt 7 of the press arrangement.
- This dewatering belt 7 then guides the web 1 together with a water-absorbing dewatering belt 6 running under the web 1 through a first press nip of the press arrangement.
- This press nip is elongated and for this purpose is formed by a lower shoe press roll 2 and an upper, vacuumed press roll 3.
- Shoe press rolls 2, 5 have a flexible roll shell, which is pressed by a press shoe with a concave pressing surface to form an extended press nip to the cylindrical counter-press roll 3, 4. Because of the longer dwell time of web 1 in the press nip, they enable intensive, yet gentle drainage.
- the web in the first press nip has a relatively high moisture content, it is sufficient to protect the volume if the shoe length of the corresponding shoe press roll 2 is less than 270 mm, preferably less than 220 mm and in particular less than 140 mm.
- the line load in the first press nip should be greater than 100 kN / m, preferably greater than 150 kN / m and in particular greater than 175 kN / m.
- the shoe press roll 2 of the first press nip has several, preferably three, separately controllable pressure zones which are arranged next to one another transversely to the web running direction 20.
- the vacuumed press roll 3 like the suction guide rolls 10 wrapped in an air-permeable drainage belt 6, 7, 9 of the press arrangement, has a perforated roll jacket, the interior of which is at least partially connected to a vacuum source.
- the cylindrical, vacuumed press roll 3 of the first extended press nip should have a jacket thickness of at least 40 mm.
- the suppression not only supports the removal of the water pressed out of the web 1, but also the adhesion of the web 1 to the corresponding dewatering belt 7, so that the lower dewatering belt 6 can be easily removed from the web 1 after the first press nip.
- the web 1 runs together with the upper dewatering belt 7 through a second press nip of the press arrangement, which is formed by the vacuumed press roll 3 and a further cylindrical press roll 4 with a smooth outer surface.
- the web 1 is guided alone on the smooth outer surface of the press roller 4 to a third press nip, which is also elongated and for this purpose by the further, cylindrical press roller 4 and a further shoe arranged above the web 1 and wrapped by a water-absorbing dewatering band 9 -Press roll 5 is formed. Since the moisture content in the first, extended press nip is significantly larger than in the second, extended press nip, it is sufficient to protect the web volume if the first extended press nip is at most as long as the second extended press nip and / or the line load in the first extended press nip is at most as large as in the second extended press nip.
- the web 1 can be subjected to hot steam within the press arrangement via one or more steam blow boxes 11.
- the areas between the first and the second and between the second and the third press nip are particularly suitable for this.
- the web guidance in the area of the extended press nips can be improved by the web 1 wrapping the corresponding cylindrical press roll 3, 4 before and after each extended press nip with at least 20 mm.
- the water-absorbing drainage belts 6, 7, 9 are designed as press felts.
- the upper dewatering belt 9 is moved away from the web 1 after the third press nip and the web 1 is continued solely on the jacket of the smooth cylindrical press roll 4 until it is transferred to a drying wire 12 of a subsequent drying unit for drying the web 1.
- the cylindrical press roll 4 of the second extended press nip is wrapped in an endlessly circulating, semi-permeable or an impermeable and smooth transfer belt 8, which accordingly runs below and together with the web 1 through the second and third press nips.
- the web 1 is then transferred from the transfer belt 8 to the dryer fabric 12 of the following drying unit without a free pull.
- the cylindrical press roll 4 according to FIG. 1 and the transfer belt 8 according to FIG. 2 are so smooth that there is sufficient adhesion of the web 1 to the press roll 4 or to the transfer belt 8 and the dewatering belt 9 after the third Press nip can be guided away from web 1.
- this liability is reinforced by a short wrapping of the lower press roll 4 by the upper dewatering belt 9.
- the suction guide roller 21 should have a plurality of separate suction zones, the vacuum of a suction zone being at least 20 kPa, preferably at least 25 kPa and in particular at least 30 kPa in order to implement a high vacuum zone.
- the web 1 is supported by the drying wire 12, alternately guided in a meandering manner over heated drying cylinders 15 and suction guide rolls 16.
- a removal scraper 17 and possibly also a following cleaning scraper are assigned to the first drying cylinder 15 of the following drying group.
- the take-off scraper 17 separates the web 1 when it is transferred from the drying cylinder 15 and then guides it into a pulper 18 located below and between the first drying cylinder 15 and the following guide roller 16.
- the axis of the first drying cylinder 15 with the removal scraper 17 and the axis of the following suction-guided guide roller 16 are vertically offset from one another.
- these axes have a horizontal distance from one another which is greater than 80%, preferably greater than 90% and in particular greater than 95% of the sum of the radii of this drying cylinder 15 and this guide roller 16.
- the transfer belt 8 is assigned a cleaning unit 13 for the fluid application of the transfer belt 8 and at least one scraper 14 after delivery of the web 1.
- This cleaning device 13 directs a cleaning fluid, here water with a pressure of at least 50, in particular at least 100 and preferably at least 120 bar, onto the web-leading side of the transfer belt 8.
- the fluid is applied via at least one, preferably at least two, preferably obliquely and advantageously in the opposite direction rows of nozzles inclined to the belt surface.
- nozzles with a small opening diameter of less than 0.9, preferably less than 0.7 and in particular at most 0.5 mm are used.
- the loosened impurities are removed from the transfer belt 8 by the following scraper 14.
- the transfer belt 8 is supported in the area of the cleaning device 13 and the scraper 14 on at least one guide roller.
Landscapes
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018119381.5A DE102018119381A1 (de) | 2018-08-09 | 2018-08-09 | Pressanordnung |
| PCT/EP2019/070687 WO2020030509A1 (de) | 2018-08-09 | 2019-07-31 | Pressanordnung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3833816A1 true EP3833816A1 (de) | 2021-06-16 |
| EP3833816B1 EP3833816B1 (de) | 2024-09-11 |
Family
ID=67514655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19748821.6A Active EP3833816B1 (de) | 2018-08-09 | 2019-07-31 | Pressanordnung |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3833816B1 (de) |
| CN (1) | CN112424421A (de) |
| DE (1) | DE102018119381A1 (de) |
| FI (1) | FI3833816T3 (de) |
| WO (1) | WO2020030509A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116219789A (zh) * | 2023-03-29 | 2023-06-06 | 广东理文造纸有限公司 | 造纸用纸幅挤压脱水装置 |
Family Cites Families (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI89085C (fi) * | 1987-01-23 | 1993-08-10 | Valmet Paperikoneet Oy | Regleringsfoerfarande foer en pappersmaskins pressparti |
| DE4321406A1 (de) | 1993-06-26 | 1993-11-11 | Voith Gmbh J M | Naßpartie einer Papiermaschine mit einer Siebpartie und einer Pressenpartie |
| FI955014A7 (fi) * | 1995-10-20 | 1997-04-21 | Valmet Corp | Paperikoneen puristinosa, jossa käytetään pitkänippipuristinta |
| DE19543111C2 (de) | 1995-11-18 | 2001-01-25 | Voith Sulzer Papiermasch Gmbh | Pressenpartie einer Papiermaschine mit geschlossener Bahnführung und Verfahren zum Entwässern einer Papierbahn |
| DE19654201A1 (de) | 1996-12-23 | 1998-06-25 | Voith Sulzer Papiermasch Gmbh | Pressenpartie |
| DE19702575A1 (de) | 1997-01-24 | 1998-07-30 | Voith Sulzer Papiermasch Gmbh | Maschine zur Herstellung einer Faserstoffbahn |
| DE19744341A1 (de) * | 1997-10-07 | 1999-04-15 | Voith Sulzer Papiertech Patent | Papiermaschine |
| FI111859B (fi) | 1998-05-15 | 2003-09-30 | Metso Paper Inc | Paperikoneen puristinosa, jossa sovelletaan yhtä tai useampaa pitkänippiä |
| DE19912497A1 (de) * | 1999-03-19 | 2000-09-21 | Voith Sulzer Papiertech Patent | Presseanordnung |
| FI116401B (fi) * | 2000-02-22 | 2005-11-15 | Metso Paper Inc | Paperi- tai kartonkikone, jossa on muodostusosa ja puristinosa |
| DE10158717A1 (de) | 2001-11-29 | 2003-06-12 | Voith Paper Patent Gmbh | Presswalze |
| DE10361269B4 (de) | 2003-12-24 | 2008-09-18 | Md Papier Gmbh & Co. Kg | Breitnippresse zum Behandeln einer Materialbahn |
| DE102004034780A1 (de) | 2004-07-19 | 2006-03-16 | Voith Paper Patent Gmbh | Langspaltpresse zum Auspressen einer laufenden Bahn, insbesondere einer Papierbahn |
| FI119069B (fi) | 2005-02-23 | 2008-07-15 | Metso Paper Inc | Järjestely rainanmuodostuskoneen puristinosalla |
| DE102005031203A1 (de) * | 2005-07-01 | 2007-01-25 | Voith Patent Gmbh | Papiermaschine |
| DE102005036903A1 (de) * | 2005-08-05 | 2007-02-08 | Voith Patent Gmbh | Vorrichtung zur Entwässerung einer Faserstoffbahn |
| DE102005039300A1 (de) * | 2005-08-19 | 2007-02-22 | Voith Patent Gmbh | Verfahren zum Betreiben einer Pressenanordnung |
| DE102005052858A1 (de) | 2005-11-07 | 2007-05-10 | Voith Patent Gmbh | Reinigungssystem |
| DE102007021879A1 (de) * | 2007-05-10 | 2008-11-13 | Voith Patent Gmbh | Pressenanordnung und Maschine zur Herstellung einer Faserstoffbahn |
| DE102007024508A1 (de) * | 2007-05-25 | 2008-11-27 | Voith Patent Gmbh | Schuhsaugpresswalze |
| DE102011004565A1 (de) | 2011-02-23 | 2012-08-23 | Voith Patent Gmbh | Pressenpartie einer Maschine zur Herstellung einer Faserstoffbahn |
| DE202012012681U1 (de) | 2012-08-21 | 2013-09-26 | Voith Patent Gmbh | Pressenpartie für eine Maschine zur Herstellung einer Faserstoffbahn |
| DE102016209780A1 (de) | 2016-06-03 | 2017-12-07 | Voith Patent Gmbh | Pressenpartie |
-
2018
- 2018-08-09 DE DE102018119381.5A patent/DE102018119381A1/de active Pending
-
2019
- 2019-07-31 CN CN201980046944.3A patent/CN112424421A/zh active Pending
- 2019-07-31 EP EP19748821.6A patent/EP3833816B1/de active Active
- 2019-07-31 WO PCT/EP2019/070687 patent/WO2020030509A1/de not_active Ceased
- 2019-07-31 FI FIEP19748821.6T patent/FI3833816T3/fi active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018119381A1 (de) | 2020-02-13 |
| EP3833816B1 (de) | 2024-09-11 |
| FI3833816T3 (fi) | 2024-11-26 |
| WO2020030509A1 (de) | 2020-02-13 |
| CN112424421A (zh) | 2021-02-26 |
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