EP0818573A3 - Process and apparatus for dewatering a paper web - Google Patents
Process and apparatus for dewatering a paper web Download PDFInfo
- Publication number
- EP0818573A3 EP0818573A3 EP97108063A EP97108063A EP0818573A3 EP 0818573 A3 EP0818573 A3 EP 0818573A3 EP 97108063 A EP97108063 A EP 97108063A EP 97108063 A EP97108063 A EP 97108063A EP 0818573 A3 EP0818573 A3 EP 0818573A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper web
- band
- dewatering
- belt
- moisture
- 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
-
- 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
Landscapes
- Paper (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Es werden ein Verfahren zum Entwässern einer Papierbahn (14) durch Einwirkung eines Gasdruckes und eine hierzu geeignete Vorrichtung (10) angegeben, wobei ein im wesentlichen quer durch die Papierbahn (14) gerichteter Gasstrom erzeugt wird, durch den Feuchtigkeit aus der Papierbahn (14) ausgetrieben wird. Dies kann dadurch geschehen, daß die Papierbahn zwischen zwei Bändern geführt wird, wovon das erste Band (20) aus einem weichen, möglichst trockenen und leicht kompressiblen Material besteht und das zweite Band (22) aus einem harten, relativ inkompressiblen und wasseraufnahmefähigen Material besteht. Infolge der Kompression des ersten Bandes (20) beim Eintreten in den Preßspalt (12) wird eine durch die Papierbahn (14) in Richtung auf das zweite Band (22) gebildete Gasströmung erzeugt, durch die Feuchtigkeit mitgenommen wird, die zum großen Teil von dem zweiten Band (22) absorbiert wird. The invention relates to a method for dewatering a paper web (14) by the action of a gas pressure and a device (10) suitable for this purpose, wherein a gas stream which is directed essentially transversely through the paper web (14) is generated, through which moisture from the paper web (14) is driven out. This can be done in that the paper web is guided between two belts, of which the first belt (20) consists of a soft, as dry and easily compressible material as possible and the second belt (22) consists of a hard, relatively incompressible and water-absorbent material. As a result of the compression of the first band (20) as it enters the press nip (12), a gas flow is formed by the paper web (14) in the direction of the second band (22), which entrains moisture, which is largely from it second band (22) is absorbed.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19627890 | 1996-07-11 | ||
DE19627890A DE19627890A1 (en) | 1996-07-11 | 1996-07-11 | Method and device for dewatering a paper web |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0818573A2 EP0818573A2 (en) | 1998-01-14 |
EP0818573A3 true EP0818573A3 (en) | 1999-01-13 |
EP0818573B1 EP0818573B1 (en) | 2002-08-21 |
Family
ID=7799503
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97108063A Expired - Lifetime EP0818573B1 (en) | 1996-07-11 | 1997-05-17 | Process and apparatus for dewatering a paper web |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0818573B1 (en) |
CA (1) | CA2210653A1 (en) |
DE (2) | DE19627890A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000006825A1 (en) * | 1998-07-27 | 2000-02-10 | Lefkowitz Leonard R | Air pumping belt |
DE19946986A1 (en) * | 1999-09-30 | 2001-04-05 | Voith Paper Patent Gmbh | Press section of a papermaking or cardboard prodn machine has at least one water extraction station where water is forced out of the web by gas in a pressure zone |
DE19946979A1 (en) * | 1999-09-30 | 2001-04-05 | Voith Paper Patent Gmbh | Assembly for the extraction of water from a wet paper/cardboard web has a support roller facing a blower box to carry the web through between a lower blanket and an upper membrane covered by a perforated belt |
DE19946971A1 (en) | 1999-09-30 | 2001-04-05 | Voith Paper Patent Gmbh | Device for dewatering a material web |
DE10304575A1 (en) * | 2003-02-05 | 2004-08-19 | Voith Paper Patent Gmbh | Press gap, to extract water from a wet web, of paper/cardboard/tissue, has compressed air channels in the counter roller mantle to form an air cushion over the web at the press roller mantle recess |
US20230295871A1 (en) * | 2022-02-11 | 2023-09-21 | David Beck | Displacement dewatering a web using compressed gas |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3416423A1 (en) * | 1983-05-12 | 1984-11-15 | Valmet Oy, Helsinki | PAPER MACHINE PRESS ROLLER, WHICH IS PROVIDED WITH AN ELASTIC LAYER, AND PAPER MACHINE PRESS, IN WHICH THE PRESS PRESS ROLLER IS INSERTED |
EP0304561A1 (en) * | 1987-08-22 | 1989-03-01 | Sulzer-Escher Wyss Gmbh | Dewatering press with steam supply |
US4888096A (en) * | 1987-12-02 | 1989-12-19 | Inotech Process Ltd. | Roll press for removing water from a web of paper using solid grooved roll and compressed air |
US5082533A (en) * | 1990-04-10 | 1992-01-21 | Beloit Corporation | Heated extended nip press with porous roll layers |
WO1997026406A1 (en) * | 1996-01-19 | 1997-07-24 | Lefkowitz Leonard R | Belt, method and apparatus for dewatering web in press nip |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2960999B2 (en) * | 1991-09-04 | 1999-10-12 | 三菱重工業株式会社 | Wet paper transfer device |
-
1996
- 1996-07-11 DE DE19627890A patent/DE19627890A1/en not_active Withdrawn
-
1997
- 1997-05-17 DE DE59708001T patent/DE59708001D1/en not_active Expired - Fee Related
- 1997-05-17 EP EP97108063A patent/EP0818573B1/en not_active Expired - Lifetime
- 1997-07-10 CA CA002210653A patent/CA2210653A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3416423A1 (en) * | 1983-05-12 | 1984-11-15 | Valmet Oy, Helsinki | PAPER MACHINE PRESS ROLLER, WHICH IS PROVIDED WITH AN ELASTIC LAYER, AND PAPER MACHINE PRESS, IN WHICH THE PRESS PRESS ROLLER IS INSERTED |
EP0304561A1 (en) * | 1987-08-22 | 1989-03-01 | Sulzer-Escher Wyss Gmbh | Dewatering press with steam supply |
US4888096A (en) * | 1987-12-02 | 1989-12-19 | Inotech Process Ltd. | Roll press for removing water from a web of paper using solid grooved roll and compressed air |
US5082533A (en) * | 1990-04-10 | 1992-01-21 | Beloit Corporation | Heated extended nip press with porous roll layers |
WO1997026406A1 (en) * | 1996-01-19 | 1997-07-24 | Lefkowitz Leonard R | Belt, method and apparatus for dewatering web in press nip |
Also Published As
Publication number | Publication date |
---|---|
CA2210653A1 (en) | 1998-01-11 |
DE59708001D1 (en) | 2002-09-26 |
DE19627890A1 (en) | 1998-01-15 |
EP0818573A2 (en) | 1998-01-14 |
EP0818573B1 (en) | 2002-08-21 |
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