EP0304561B1 - Entwässerungspresse mit Dampfzufuhr - Google Patents

Entwässerungspresse mit Dampfzufuhr Download PDF

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Publication number
EP0304561B1
EP0304561B1 EP88108738A EP88108738A EP0304561B1 EP 0304561 B1 EP0304561 B1 EP 0304561B1 EP 88108738 A EP88108738 A EP 88108738A EP 88108738 A EP88108738 A EP 88108738A EP 0304561 B1 EP0304561 B1 EP 0304561B1
Authority
EP
European Patent Office
Prior art keywords
paper web
pressing
dewatering
press
shoe
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.)
Expired - Lifetime
Application number
EP88108738A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0304561A1 (de
Inventor
Hans Dr. Dipl.-Ing. Dahl
Herbert Dipl.-Ing. Holik
Reinhard Dipl.-Ing. Bluhm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sulzer Escher Wyss GmbH
Original Assignee
Sulzer Escher Wyss GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sulzer Escher Wyss GmbH filed Critical Sulzer Escher Wyss GmbH
Priority to AT88108738T priority Critical patent/ATE69840T1/de
Publication of EP0304561A1 publication Critical patent/EP0304561A1/de
Application granted granted Critical
Publication of EP0304561B1 publication Critical patent/EP0304561B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/84—Paper-making machines

Definitions

  • the invention relates to a dewatering press specified in the preamble of claim 1.
  • the invention is intended to achieve better, higher drying results without damaging the paper web.
  • the process should be clear and manageable.
  • the process taking place in the press nip is fully controllable, since the supply of the water vapor selected to flow through the paper web can be regulated as required.
  • a high heat flow density can be achieved in the paper web.
  • This flow medium does not cause cooling, e.g. with air, inside the paper web to be dried, since the condensation heat released is available for further heating of the paper web.
  • the resulting high temperature in the paper web to be dried supports the drying effect by reducing the viscosity and the surface tension in the displacement of capillary water from the web.
  • the removal of the water vapor with the expelled liquid is also clear and manageable.
  • the dewatering press of a paper machine is provided for dewatering the paper web 1 with a stream of a gaseous medium passed through the paper web.
  • the dewatering takes place in a press nip 2 between an upper press surface 3 and a lower press surface 4, where the paper web is compressed to such an extent that at least part of the paper web is in a saturated state.
  • Saturated is the state in which all voids in the paper web are filled with water.
  • This adjustable water vapor flow which transports the liquid from the web, is brought about by means used in the area of the press nip 2.
  • Fig. 1 shows the arrangement of such a dewatering press.
  • the water vapor flow is brought about by the following means used in the area of the press nip 2: the upper roller 3 has a perforated jacket 5, and an externally generated water vapor under pressure is pressed through it by means of a pressure chamber (not shown) through the perforated jacket 5 the press nip 2 to the upper surface of the paper web 1 is regulated.
  • the wide nip press shoe 13 is integrated in an upper roll 33 as a wide nip roll with a support 12 and press shoe 13 around which a perforated, flexible jacket 52 is arranged.
  • the press shoe 13 is pressed against the lower roller 4 with a pressure medium 14, the water vapor via line 15 into the press nip 2 through the pressure chamber 13 1 present in the press shoe and opened to the jacket 5 2 or to the press nip 2 and through the perforated flexible jacket 52 is performed.
  • a vapor cushion is created here that statically Paper web, or a felt tape and the paper web supports and prevents friction on the shoe surface or edges.
  • the lower roller 4 also has a perforated jacket 6 and the water vapor stream flowing through the web 1 is sucked in through the perforated jacket 6 with the liquid which has thus been expelled from the paper web.
  • the suction power via a suction chamber can also be regulated.
  • the entire drying process is clear and easy to control. It is also conceivable to provide the lower roller jacket 6 with an externally grooved surface on which the water vapor flowing through the web 1 can be removed with the liquid expelled from it.
  • the roller pair described with the rollers 3 and 4 can be preceded by a few roller pairs 7 for pre-pressing or pre-dewatering with a gradually increasing pressing pressure, possibly with a higher temperature in each case.
  • felt tapes 8 and 9 are provided between the surface of the paper web 1 and the relevant roller 3 and 4, respectively , both of which have good vapor permeability.
  • One felt band 8 could be omitted if such a marking were tolerable or even desired.
  • Both embodiments just described can be varied by pressing the press shoe against the press nip 2 with steam pressure and guiding the water vapor from the press shoe's pressure chamber in the manner known for hydrostatic pressing elements through the press shoe into its pressure pocket 13 1.
  • a press shoe operated with steam could be designed in this way (FIG. 3).
  • the upper roller 3 has a perforated jacket 5 through which the water vapor is guided to the press nip 2.
  • the counter roll 4 forming the press nip 2 is a wide nip roll of the type described above with an impermeable flexible jacket 5 1.
  • a felt belt 9 1 is provided, which has a large receiving volume and is able to absorb the water vapor flow after flowing through the paper web 1 and partially to divert it in the running direction.
  • the felt belt 9 1 In addition to being able to "suck in” the steam, the felt belt 9 1 not only has good transport properties and the high absorption capacity, it can also be cooled in order to also dewater the web due to the temperature gradient between the hot and the cool side of the paper web support by condensing some of the water vapor in the cooled felt.
  • the pressure pocket 13 1 of the press shoe is fed with a cooling medium via a line 16. It would also be possible to pre-cool the felt belt with suitable means before entering the press nip 2. It would also be conceivable to design the lower roller as a cooled full-surface roller and thus and / or with said pre-cooling 11 to cool the suction felt belt (see FIGS. 3 and 11).
  • FIG. 12 also shows an imaginable embodiment of the press nip shoe, in which it has pressure chambers (13 1) which are provided with a porous or perforated cover (13 3) in the pressing direction.
  • a perforated upper roller 3 for guiding the steam and a lower cooling roller 4 are shown.
  • the steam can be transported through the felt 9 1 in the running direction.
  • the steam is introduced into a wide press nip from a wide press shoe through a permeable elastic jacket 51.
  • a cooled felt belt 9 2 is provided on a cooling roller 4 on the discharge side.
  • Fig. 9 one can see an upper perforated roller 3 for introducing the steam into the wide press nip which is formed with a wide press nip shoe 13 2 which is provided on the discharge side.
  • the paper web is guided through the wide press nip between an upper and a lower felt 8 or 9.
  • the paper web 1 is passed between the two felts 8 and 9 through a wide press nip which is formed between a convex surface of the upper shoe 13 1 and the concave surface of the lower shoe 13 2.
  • the two press shoes can be pressed against each other, as indicated by arrows.
  • the surfaces are perforated and the paper web 1 is guided between the felts 8 and 9.
  • Fig. 7 shows a drainage in the flat wide press nip which is formed between flat pressing surfaces of the upper shoe 13 1 and the lower shoe 13 2.
  • the upper one is a heating shoe, the lower one is for removal. Preheating must also be ensured here. as is provided, for example, in the construction with apparatus 10 according to FIG. 2.
  • Equipment acc. Figure 8 also has a flat, wide press nip.
  • the steam is fed onto the paper web from the upper shoe 13 1 through a permeable flexible belt 5 1.
  • a press shoe 13 2 is provided on the discharge side and is opened to a felt belt 9 supporting the paper web.
  • the paper web 1 is guided between two felts 8 and 9 through a flat wide press nip which is formed between the press shoes 13 1 and 13 2.
  • the pressing surfaces 26 of the shoes are located on both sides of the openings in the press shoes, which are provided for guiding the steam through the paper web 1.
  • the wide press shoes are each operated by a force-generating element 231 or 232 in the pressing direction.
  • FIG. 4 shows an opposite construction to FIG. 9.
  • a perforated suction roller 4 is arranged on the discharge side.
  • On the feed side there is provided a wide-nip shoe 13 which forms a wide-nip with the roller 4. Due to the steam pressure in the press shoe 13, the felt 8 moves gently and with little friction on a steam cushion.

Landscapes

  • Paper (AREA)
EP88108738A 1987-08-22 1988-06-01 Entwässerungspresse mit Dampfzufuhr Expired - Lifetime EP0304561B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88108738T ATE69840T1 (de) 1987-08-22 1988-06-01 Entwaesserungspresse mit dampfzufuhr.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873728124 DE3728124A1 (de) 1987-08-22 1987-08-22 Entwaesserungspresse mit dampfzufuhr
DE3728124 1987-08-22

Publications (2)

Publication Number Publication Date
EP0304561A1 EP0304561A1 (de) 1989-03-01
EP0304561B1 true EP0304561B1 (de) 1991-11-27

Family

ID=6334326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88108738A Expired - Lifetime EP0304561B1 (de) 1987-08-22 1988-06-01 Entwässerungspresse mit Dampfzufuhr

Country Status (3)

Country Link
EP (1) EP0304561B1 (enrdf_load_stackoverflow)
AT (1) ATE69840T1 (enrdf_load_stackoverflow)
DE (2) DE3728124A1 (enrdf_load_stackoverflow)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0780512A1 (de) * 1995-12-20 1997-06-25 Franz-Ferdinand Dipl.-Kfm. Kufferath Vorrichtung zum Entwässern einer Faserbahn
DE19627890A1 (de) * 1996-07-11 1998-01-15 Voith Sulzer Papiermasch Gmbh Verfahren und Vorrichtung zum Entwässern einer Papierbahn
DE19946973A1 (de) * 1999-09-30 2001-04-05 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Entwässerung einer Faserstoffbahn
DE19946979A1 (de) * 1999-09-30 2001-04-05 Voith Paper Patent Gmbh Vorrichtung zur Entwässerung einer Materialbahn
DE19946984A1 (de) * 1999-09-30 2001-04-05 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Entwässerung einer Faserstoffbahn
DE19946972A1 (de) * 1999-09-30 2001-04-05 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Entwässerung einer Materialbahn
US6645420B1 (en) 1999-09-30 2003-11-11 Voith Sulzer Papiertechnik Patent Gmbh Method of forming a semipermeable membrane with intercommunicating pores for a pressing apparatus
DE19946982A1 (de) * 1999-09-30 2001-04-05 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Entwässerung einer Faserstoffbahn
DE19946978A1 (de) * 1999-09-30 2001-04-05 Voith Paper Patent Gmbh Vorrichtung zur Entwässerung einer Materialbahn
DE50013759D1 (de) * 1999-09-30 2006-12-28 Voith Patent Gmbh Verfahren und Vorrichtung zur Entwässerung einer Faserstoffbahn
DE10157693C5 (de) * 2001-11-24 2012-04-26 Voith Patent Gmbh Vorrichtung und Verfahren zum Aufwickeln einer Papier- oder Kartonbahn
DE10304575A1 (de) * 2003-02-05 2004-08-19 Voith Paper Patent Gmbh Pressspaltanordnung
WO2005075732A2 (en) * 2004-01-30 2005-08-18 Voith Paper Patent Gmbh Press section and permeable belt in a paper machine
US7476294B2 (en) 2004-10-26 2009-01-13 Voith Patent Gmbh Press section and permeable belt in a paper machine
US7294237B2 (en) 2004-01-30 2007-11-13 Voith Paper Patent Gmbh Press section and permeable belt in a paper machine
US7476293B2 (en) 2004-10-26 2009-01-13 Voith Patent Gmbh Advanced dewatering system
US7510631B2 (en) 2004-10-26 2009-03-31 Voith Patent Gmbh Advanced dewatering system
US7527709B2 (en) 2006-03-14 2009-05-05 Voith Paper Patent Gmbh High tension permeable belt for an ATMOS system and press section of paper machine using the permeable belt
EP1845187A3 (en) 2006-04-14 2013-03-06 Voith Patent GmbH Twin wire former for an atmos system
US7550061B2 (en) 2006-04-28 2009-06-23 Voith Paper Patent Gmbh Dewatering tissue press fabric for an ATMOS system and press section of a paper machine using the dewatering fabric
US7524403B2 (en) 2006-04-28 2009-04-28 Voith Paper Patent Gmbh Forming fabric and/or tissue molding belt and/or molding belt for use on an ATMOS system
US20230295871A1 (en) * 2022-02-11 2023-09-21 David Beck Displacement dewatering a web using compressed gas

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0151447A2 (de) * 1984-02-06 1985-08-14 Sulzer-Escher Wyss Gmbh Nasspresse zum Entwässern einer Warenbahn

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2198387A (en) * 1935-04-26 1940-04-23 Holge Sigbjorn Paul Ebbinghaus Paper making machine
US2696148A (en) * 1950-01-07 1954-12-07 Beloit Iron Works Combined fluid pressure and suction press
US3162568A (en) * 1961-03-23 1964-12-22 James E Post Press units for moisture removal
SE364328B (enrdf_load_stackoverflow) * 1969-01-27 1974-02-18 Tampella Oy Ab
US4163688A (en) * 1972-11-30 1979-08-07 Valmet Oy Apparatus for dewatering in a paper machine
DE2529671C2 (de) * 1975-07-03 1982-07-15 Hans 7930 Ehingen Röscheisen Vorrichtung zum Erwärmen einer Faserstoffbahn
US4272316A (en) * 1979-05-29 1981-06-09 Beloit Corporation Steam shower

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0151447A2 (de) * 1984-02-06 1985-08-14 Sulzer-Escher Wyss Gmbh Nasspresse zum Entwässern einer Warenbahn

Also Published As

Publication number Publication date
DE3866469D1 (de) 1992-01-09
EP0304561A1 (de) 1989-03-01
DE3728124C2 (enrdf_load_stackoverflow) 1991-06-27
DE3728124A1 (de) 1989-03-02
ATE69840T1 (de) 1991-12-15

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