EP0304561A1 - Presse de déshydratation avec amenée de vapeur - Google Patents

Presse de déshydratation avec amenée de vapeur Download PDF

Info

Publication number
EP0304561A1
EP0304561A1 EP88108738A EP88108738A EP0304561A1 EP 0304561 A1 EP0304561 A1 EP 0304561A1 EP 88108738 A EP88108738 A EP 88108738A EP 88108738 A EP88108738 A EP 88108738A EP 0304561 A1 EP0304561 A1 EP 0304561A1
Authority
EP
European Patent Office
Prior art keywords
press
paper web
dewatering
nip
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.)
Granted
Application number
EP88108738A
Other languages
German (de)
English (en)
Other versions
EP0304561B1 (fr
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
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, Escher Wyss GmbH filed Critical Sulzer Escher Wyss GmbH
Priority to AT88108738T priority Critical patent/ATE69840T1/de
Publication of EP0304561A1 publication Critical patent/EP0304561A1/fr
Application granted granted Critical
Publication of EP0304561B1 publication Critical patent/EP0304561B1/fr
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 manageable, 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, within 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.
  • FIG. 1 to 12 each a drainage press according to the invention in a schematic representation.
  • 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 a part of the paper web is in a saturated state.
  • a controllable water vapor flow is passed through the paper web 1 passing through the press nip 2 from the upper to the lower surface of the paper web 1 and is discharged from the paper web on the lower surface of the paper web.
  • 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.
  • said 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 through it with the aid of a pressure chamber (not shown) the perforated jacket 5 is supplied with an externally generated water vapor under pressure in the press nip 2 to the upper surface of the paper web 1 in a regulated manner.
  • 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 (not shown) can also be regulated. The entire drying process is clear and easy to control.
  • the described pair of rollers with the rollers can 3 and 4 a few pairs of rollers 7 for pre-pressing or pre-dewatering with a gradually increasing pressing pressure, possibly with a higher temperature in stages.
  • felt strips 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. These could be omitted if such a marking were tolerable or even desired.
  • the upper roller 3 3 is a wide-nip roller with a carrier 12 and press shoe 13, around which a perforated, flexible jacket 5 2 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.
  • 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 space through the press shoe into its pressure pocket 13 1 in the manner known for hydrostatic pressing elements.
  • 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.
  • Between the roller 4 and the paper web 1 is provided with a felt belt 9 1, which has a large holding volume and which 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 to cool the suction felt belt with said pre-cooling 11 (see FIGS. 3 and 11).
  • FIG. 12 Also shown in Fig. 12 is a conceivable 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 transferred into a wide press nip from a wide press shoe initiated a permeable elastic jacket 51.
  • a cooled felt belt 9 2 is provided on a cooling roller 4 on the discharge side.
  • FIG. 9 shows 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 one another, 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, e.g. is provided in the construction with apparatus 10 according to FIG. 2.
  • Equipment acc. Figure 8 also has a flat wide 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 press 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 actuated in the pressing direction by a force-generating element 23 1 or 23 2.
  • FIG. 4 shows an opposite construction to FIG. 9.
  • a perforated suction roller 4 is arranged on the discharge side.
  • a wide-nip shoe 13 forming a wide-nip with the roller 4 is provided. Due to the steam pressure in the press shoe 13, the felt 8 moves gently and with little friction on a steam cushion.

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  • Paper (AREA)
EP88108738A 1987-08-22 1988-06-01 Presse de déshydratation avec amenée de vapeur Expired - Lifetime EP0304561B1 (fr)

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
DE3728124 1987-08-22
DE19873728124 DE3728124A1 (de) 1987-08-22 1987-08-22 Entwaesserungspresse mit dampfzufuhr

Publications (2)

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

Family

ID=6334326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88108738A Expired - Lifetime EP0304561B1 (fr) 1987-08-22 1988-06-01 Presse de déshydratation avec amenée de vapeur

Country Status (3)

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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0780512A1 (fr) * 1995-12-20 1997-06-25 Franz-Ferdinand Dipl.-Kfm. Kufferath Dispositif pour l'élimination de l'eau d'une bande fibreuse
EP0818573A3 (fr) * 1996-07-11 1999-01-13 Voith Sulzer Papiermaschinen GmbH Procédé et dispositif pour la déshydratation d'une bande de papier
EP1088933A3 (fr) * 1999-09-30 2002-08-21 Voith Paper Patent GmbH Membrane semiperméable avec pores interconnectés pour une presse
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
EP4230792A1 (fr) * 2022-02-11 2023-08-23 Beck Displacement Press LLC Déshydratation par déplacement d'une bande à l'aide de gaz comprimé

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19946978A1 (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
DE19946982A1 (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
DE19946972A1 (de) * 1999-09-30 2001-04-05 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Entwässerung einer Materialbahn
DE19946973A1 (de) * 1999-09-30 2001-04-05 Voith Paper 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
RU2338098C2 (ru) * 2004-01-30 2008-11-10 Фойт Пэйпер Патент Гмбх Прессующая часть и проницаемая лента в бумагоделательной машине
US7476293B2 (en) 2004-10-26 2009-01-13 Voith Patent Gmbh Advanced dewatering system
US7294237B2 (en) 2004-01-30 2007-11-13 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
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 (fr) 2006-04-14 2013-03-06 Voith Patent GmbH Formeur à deux toiles de système ATMOS
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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Family Cites Families (6)

* 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
SE364328B (fr) * 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
DE3408118A1 (de) * 1984-02-06 1985-08-14 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Nasspresse zum entwaessern einer faserbahn

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0780512A1 (fr) * 1995-12-20 1997-06-25 Franz-Ferdinand Dipl.-Kfm. Kufferath Dispositif pour l'élimination de l'eau d'une bande fibreuse
EP0818573A3 (fr) * 1996-07-11 1999-01-13 Voith Sulzer Papiermaschinen GmbH Procédé et dispositif pour la déshydratation d'une bande de papier
EP1088933A3 (fr) * 1999-09-30 2002-08-21 Voith Paper Patent GmbH Membrane semiperméable avec pores interconnectés pour une presse
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
EP1362950A1 (fr) * 1999-09-30 2003-11-19 Voith Paper Patent GmbH Procédé et dispositif pour la déshydratation d' une bande fibreuse
EP4230792A1 (fr) * 2022-02-11 2023-08-23 Beck Displacement Press LLC Déshydratation par déplacement d'une bande à l'aide de gaz comprimé

Also Published As

Publication number Publication date
DE3728124A1 (de) 1989-03-02
EP0304561B1 (fr) 1991-11-27
ATE69840T1 (de) 1991-12-15
DE3728124C2 (fr) 1991-06-27
DE3866469D1 (de) 1992-01-09

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