EP1101862A2 - Pressanordnung - Google Patents
Pressanordnung Download PDFInfo
- Publication number
- EP1101862A2 EP1101862A2 EP00122518A EP00122518A EP1101862A2 EP 1101862 A2 EP1101862 A2 EP 1101862A2 EP 00122518 A EP00122518 A EP 00122518A EP 00122518 A EP00122518 A EP 00122518A EP 1101862 A2 EP1101862 A2 EP 1101862A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- suction
- arrangement according
- roller
- press arrangement
- 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
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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
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/0272—Wet presses 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
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/04—Arrangements thereof
Definitions
- the invention relates to a press arrangement for dewatering a paper, cardboard, Tissue or another fibrous web in a machine for manufacturing and / or Refining the same, consisting of at least one, of two against each other pressed press rolls formed press nip, through the next to the fibrous web at least one above and one below the fibrous web Drainage belt runs, the fibrous web in one after the press nip subsequent guiding route with the upper and lower Drainage belt is in contact.
- a sandwich guide is necessary the still moist fibrous web safely and stably lead out of the press nip can.
- Fibrous webs can require long guide distances. This is with a considerable constructive and energetic effort for the suction box connected.
- the negative pressures that can be achieved are generally not sufficient, in order to have a positive effect on the fibrous web.
- the object of the invention is therefore to provide a good press arrangement Leadership and the least possible rewetting of the fibrous web improve.
- the object was achieved in that the lower Drainage belt in the area of the guide line across at least one across Fibrous web extending suction device is guided, which with a Vacuum source is connected, the vacuum preferably between 0.1 and is 0.4 bar.
- the negative pressure increases the contact pressure Fibrous web on the lower drainage belt and the detachment from the upper Drainage belt so that the upper drainage belt at the end of the Guide path can be led away and the fibrous web after the Guideway adheres well to the lower drainage belt.
- the routing of the upper dewatering band minimizes rewetting.
- the suction device viewed only over part of the guiding route in the direction of web travel, extends and preferably ends before the end of the guide route. This results from the fact that the suction device's effect on rewetting and guidance of the fibrous web also after the suction device at least up to Sufficient end of the guide route is preserved.
- suction device is preferred is designed as a suction box in a range between 40 and 80 cm the press nip begins.
- the suction box should be pivoted.
- the suction device has one or more compared to the drainage belt Suction slots.
- the width of the suction slots is preferably limited to 10-30 mm, so that the drainage belt with the fibrous web is not too far into the Suction slits is pulled. It can also be advantageous if the Suction slots are of different widths.
- the Suction slots are of different widths.
- For cleaning the inside of the suction box and / or the suction slots can be the arrangement of a spray tube in the suction box be beneficial.
- the route has i. a. a length between 100 and 180 cm.
- To the effectiveness of the sucked To improve roller water and the air boundary layer should be in the untwisted Area from the vacuumed roller.
- the suction device At the beginning and / or at the end of the suction device, one should be transverse to the Fibrous web running and in contact with the lower drainage belt Standing squeegee can be arranged for water drainage.
- the negative pressure of the Suction device increases the pressure of the lower drainage belt on the Squeegees so that they drain water from the drainage belt very efficiently can strip and lead away.
- the squeegee can also be from Drain off the centrifuged water from the roller jacket of the lower press roller.
- the squeegee at the beginning of the suction device can, advantageously with the suction device together, part of a, assigned to the lower press roller Be water collecting device, which the thrown and stripped Water collects and drains.
- the squeegee, a separate baffle or baffle for removing the the lower press roll is thrown off water.
- To humidify the centrifuged water of the upper press roller should also prevent the upper drainage belt after the press nip Water absorption device, preferably assigned in the form of a water channel his.
- the press section is part of a machine for producing a fibrous web 1 in Form a paper web and serves to drain it.
- the figure shows this the or one of several press nips, which of two against each other pressed and, for example, approximately arranged press rollers 2, 3 is formed.
- the fibrous web 1 In addition to the fibrous web 1, one is arranged above 4 and below 5 water and air permeable, endless all-round drainage belt in shape a press felt to absorb the squeezed water through the press nip guided. Because of the high web speed and the strong adhesion of the The fibrous web 1 on both drainage belts 4, 5 remains the fibrous web 1 after the press nip in a subsequent guide section 6 also with both Drainage belts 4.5 in contact.
- the guide section 6 has a length of approx. 140 cm.
- the lower drainage belt 5 is in a part of the guide section 6 via a transversely to the fibrous web 1 running suction device 7, which over a Port 15 is connected to a vacuum source.
- the suction device 6 begins approx. 60 cm after the press nip.
- the vacuum acts through several suction slots Suction device 7 on the lower drainage belt 5 and thus hampers one Remoisten the fibrous web 1 from this dewatering belt 5, wherein the suction slots have the same width.
- the liability on lower drainage belt 5 increased and a detachment of the fibrous web 1 from upper drainage belt 4 causes.
- the length of the web running direction 8 short suction device 7 with respect to the guide section 6 represents a good one Compromise between effort and effect.
- the fibrous web 1 runs only with the lower one Drainage belt 5 further.
- the scraper 19 is about an air hose running across the machine to the jacket of the vacuumed Roller pressed.
- the suction device 7 At the beginning and at the end of the suction device 7 there is one each transverse to the fibrous web 1 running and in contact with the lower drainage belt 5 Squeegee 9 arranged for water drainage.
- the vacuum of the suction device 7 increases the pressure of the lower drainage belt 5 on the squeegees 9, so that they drain away more water from the lower drainage belt 5 can.
- the squeegees 9 have a comparative effect on the Water content in the lower dewatering band 5, which is advantageous for that Moisture-cross profile of the fibrous web 1 affects.
- the in the web running direction 8 first squeegee 9 is together with the Suction device 7 part of a, the centrifuged and stripped water receiving water collecting device 17. This also takes that from one Scraper 16 scraped water from the lower press roll 3. Besides, will here also shown the possibility of arranging a baffle 18, which before the first squeegee 9 is arranged and the water thrown off lower press roll 3 derives.
- a water absorption device 11 in the form of a known Gully provided.
- the roll jackets 12 of both press rolls 2, 3 are supported by the support elements 13, 14 pressed against each other.
- the Roll jacket 12 of the upper press roll 2 is flexible and has it Support element 13 of the upper press roller 2 has a concave contact surface.
- the roll jacket 12 of the lower press roll 3 is relatively dimensionally stable and the contact surface of this support element 14 is convex.
- this is only exemplary to see.
Landscapes
- Paper (AREA)
Abstract
Description
Claims (21)
- Pressanordnung zur Entwässerung einer Papier-, Karton-, Tissue-oder einer anderen Faserstoffbahn (1) in einer Maschine zur Herstellung und/oder Veredelung derselben, bestehend aus zumindest einem, von zwei gegeneinander gepreßten Presswalzen (2,3) gebildeten Preßspalt, durch den neben der Faserstoffbahn (1) wenigstens ein oberhalb (4) und ein unterhalb (5) der Faserstoffbahn (1) verlaufendes Entwässerungsband läuft, wobei die Faserstoffbahn (1) nach dem Preßspalt in einer sich anschließenden Führungsstrecke (6) mit dem oberen (4) und dem unteren (5) Entwässerungsband in Kontakt steht, dadurch gekennzeichnet, dass
das untere Entwässerungsband (5) im Bereich der Führungsstrecke (6) über zumindest eine quer zur Faserstoffbahn (1) verlaufende Saugvorrichtung (7) geführt wird, welche mit einer Unterdruckquelle verbunden ist. - Pressanordnung nach Anspruch 1, dadurch gekennzeichnet, dass
die Saugvorrichtung (7) sich nur über einen Teil der Führungsstrecke (6), in Bahnlaufrichtung (8) betrachtet, erstreckt und vorzugsweise bereits vor dem Ende der Führungsstrecke (6) endet. - Pressanordnung nach Anspruch 2, dadurch gekennzeichnet, dass
die Saugvorrichtung (7) vorzugsweise als Saugkasten ausgeführt ist, die in einem Bereich zwischen 40 und 80 cm nach dem Preßspalt beginnt. - Pressanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
die Saugvorrichtung (7) gegenüber dem Entwässerungsband (5) einen oder mehrere, vorzugsweise zwischen einen und drei Saugschlitze aufweist. - Pressanordnung nach Anspruch 4, dadurch gekennzeichnet, dass
die Saugschlitze eine Breite von 10 bis 30 mm haben. - Pressanordnung nach Anspruch 5, dadurch gekennzeichnet, dass
die Saugschlitze die gleiche Breite besitzen. - Pressanordnung nach Anspruch 5, dadurch gekennzeichnet, dass
die Saugschlitze unterschiedlich breit sind. - Pressanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
die Saugvorrichtung (7) mit einem Unterdruck zwischen 0,1 und 0,4 bar besaugt wird. - Pressanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
die Saugvorrichtung (7) schwenkbar gelagert ist. - Pressanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
sich in der Saugvorrichtung (7) zumindest ein Spritzrohr zur Reinigung des Inneren und/oder der Saugschlitze befindet. - Pressanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
die Führungsstrecke (6) eine Länge zwischen 100 und 180 cm hat. - Pressanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
am Anfang und/oder am Ende der Saugvorrichtung (7) eine quer zur Faserstoffbahn (1) verlaufende und mit dem unteren Entwässerungsband (5) in Kontakt stehende Abstreifleiste (9) zur Wasserableitung angeordnet ist. - Pressanordnung nach Anspruch 12, dadurch gekennzeichnet, dass
die Abstreifleiste (9) am Anfang der Saugvorrichtung (7) angeordnet und so ausgebildet ist, daß sie einerseits Wasser vom unteren Entwässerungsband (5) abstreifen und andererseits das vom Walzenmantel (12) der unteren Preßwalze (3) abgeschleuderte Wasser ableiten kann. - Pressanordnung nach Anspruch 12 oder 13, dadurch gekennzeichnet, dass
vor der Saugvorrichtung (7) ein Leitblech (18) oder Leitkörper zur Ableitung des vom Walzenmantel (12) der unteren Preßwalze (3) abgeschleuderten Wassers angeordnet ist. - Pressanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
die Faserstoffbahn (1) nach der Führungsstrecke (6) nur mit dem unteren Entwässerungsband (5) weiterläuft. - Pressanordnung nach Anspruch 6, dadurch gekennzeichnet, dass
das untere Entwässerungsband (5) am Ende der Führungsstrecke (6) über eine weitere Sauganordnung (10), vorzugsweise in Form einer besaugten Walze geführt wird. - Pressanordnung nach Anspruch 16, dadurch gekennzeichnet, dass
die Saugvorrichtung (7) einen Abstreifer (19) umfaßt, der zum Abstreifen von Luft und Wasser von der besaugten Walze dient. - Preßanordnung nach Anspruch 17, dadurch gekennzeichnet, dass
der Abstreifer (19) über einen quer zur Maschine verlaufenden Luftschlauch an den Mantel der besaugten Walze anpreßbar ist. - Preßanordnung nach Anspruch 17 oder 18, dadurch gekennzeichnet, dass der Abstreifer (19) separat gelagert ist.
- Pressanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
dem oberen Entwässerungsband (4) nach dem Preßspalt eine Wasseraufnahmevorrichtung (11), vorzugsweise in Form einer Wasserrinne zugeordnet ist. - Pressanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
zumindest der Walzenmantel (12) einer Presswalze (2,3) von einem Stützelement (13,14) zum Preßspalt hin gedrückt wird und der Preßspalt vorzugsweise verlängert ausgeführt ist.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999155030 DE19955030A1 (de) | 1999-11-16 | 1999-11-16 | Verfahren zum Überführen einer zu behandelnden Faserstoffbahn |
DE19955030 | 1999-11-16 | ||
DE10030048 | 2000-06-19 | ||
DE2000130048 DE10030048A1 (de) | 2000-06-19 | 2000-06-19 | Pressanordnung |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1101862A2 true EP1101862A2 (de) | 2001-05-23 |
EP1101862A3 EP1101862A3 (de) | 2001-11-07 |
EP1101862B1 EP1101862B1 (de) | 2007-04-11 |
Family
ID=26006138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20000122518 Expired - Lifetime EP1101862B1 (de) | 1999-11-16 | 2000-10-14 | Pressanordnung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1101862B1 (de) |
DE (1) | DE50014234D1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1234911A2 (de) * | 2001-02-22 | 2002-08-28 | Voith Paper Patent GmbH | Feuchtequerprofil |
CN113521632A (zh) * | 2021-07-12 | 2021-10-22 | 曾翔 | 一种消防水带卷收装置 |
CN114234570A (zh) * | 2021-11-09 | 2022-03-25 | 衡阳同禧透气包装有限公司 | 一种包装纸生产用烘干装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5888354A (en) * | 1996-04-04 | 1999-03-30 | Valmet Corporation | Transfer of a web in a paper machine from a two-felt press nip to a dryer section |
US5972170A (en) * | 1996-10-31 | 1999-10-26 | Voith Sulzer Papiermaschinen Gmbh | Suction box |
-
2000
- 2000-10-14 DE DE50014234T patent/DE50014234D1/de not_active Expired - Lifetime
- 2000-10-14 EP EP20000122518 patent/EP1101862B1/de not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5888354A (en) * | 1996-04-04 | 1999-03-30 | Valmet Corporation | Transfer of a web in a paper machine from a two-felt press nip to a dryer section |
US5972170A (en) * | 1996-10-31 | 1999-10-26 | Voith Sulzer Papiermaschinen Gmbh | Suction box |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1234911A2 (de) * | 2001-02-22 | 2002-08-28 | Voith Paper Patent GmbH | Feuchtequerprofil |
EP1234911A3 (de) * | 2001-02-22 | 2003-12-10 | Voith Paper Patent GmbH | Feuchtequerprofil |
CN113521632A (zh) * | 2021-07-12 | 2021-10-22 | 曾翔 | 一种消防水带卷收装置 |
CN113521632B (zh) * | 2021-07-12 | 2022-09-13 | 曾翔 | 一种消防水带卷收装置 |
CN114234570A (zh) * | 2021-11-09 | 2022-03-25 | 衡阳同禧透气包装有限公司 | 一种包装纸生产用烘干装置 |
Also Published As
Publication number | Publication date |
---|---|
EP1101862A3 (de) | 2001-11-07 |
EP1101862B1 (de) | 2007-04-11 |
DE50014234D1 (de) | 2007-05-24 |
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