EP1852551B1 - Dispositif d'égouttage - Google Patents

Dispositif d'égouttage Download PDF

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Publication number
EP1852551B1
EP1852551B1 EP20070107298 EP07107298A EP1852551B1 EP 1852551 B1 EP1852551 B1 EP 1852551B1 EP 20070107298 EP20070107298 EP 20070107298 EP 07107298 A EP07107298 A EP 07107298A EP 1852551 B1 EP1852551 B1 EP 1852551B1
Authority
EP
European Patent Office
Prior art keywords
tissue web
belt
press
roll
press roll
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.)
Not-in-force
Application number
EP20070107298
Other languages
German (de)
English (en)
Other versions
EP1852551A1 (fr
Inventor
Andreas Meschenmoser
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.)
Voith Patent GmbH
Original Assignee
Voith Patent 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 Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1852551A1 publication Critical patent/EP1852551A1/fr
Application granted granted Critical
Publication of EP1852551B1 publication Critical patent/EP1852551B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D21F3/0272—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
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • D21F11/145—Making cellulose wadding, filter or blotting paper including a through-drying process
    • 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
    • D21F3/0281—Wet presses in combination with a dryer roll
    • 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
    • D21F5/18—Drying webs by hot air
    • D21F5/182—Drying webs by hot air through perforated cylinders

Definitions

  • the invention relates to a device for dewatering a tissue web according to the preamble of claim 1, as well as a machine with this device.
  • Such press arrangements have been known for a long time, but can not yet satisfy the drainage performance. Although this can be improved by a suction of the tissue web in the pressing area, but this is also relatively energy-intensive.
  • a device for producing a tissue web is described.
  • the pulp is applied by means of a headbox on a dewatering screen and dewatered there and formed a tissue web.
  • After the transfer of the web to a transport screen this is dried by two consecutively arranged through-air dryer, wherein the direction of the air flow is different.
  • the tissue web is then transferred to a drying cylinder for further drying and creping.
  • the document US3,771,236 discloses a through-flow drying device, and a method for drying sheet-like material webs.
  • the web is guided between a belt and a carrier tape through a pressure field, which causes an air flow through the belt, the web and the carrier tape.
  • the tape consists of a felt or fabric having a perforated layer. This layer causes a uniform flow through the material web with air even with locally different water content of the web.
  • the document DE10303959 A1 shows a positive displacement dewatering press for dewatering a fibrous web by displacing water by means of gas and mechanical pressure. It comprises a gas pressure-generating blow roll, a guided together with the fibrous web around the blow roll, lying between the fibrous web and the blow roll gas-permeable inner carrier tape and at least one guided around the blow roll, lying on the side remote from the blow roll and the carrier tape side of the fibrous web, the mechanical pressure generating, in particular high-strength outer screen.
  • the object of the invention is therefore to allow a gentle and effective drainage of the fibrous web as possible.
  • this object is achieved in that in the Umschl Trents Symposium on the, the press roll opposite side of the tissue web two bands are arranged, wherein the outer band forms a water-permeable press belt and arranged between the tissue web and the press belt, in contact with the Tissuebahn upcoming band is designed as wasserduchiner felt.
  • the blowing air causes a für für Stunsky the tissue web in the wrap of the press roll in a very cost effective manner, especially since compressed air is available in such machines in sufficient quantity.
  • the application of hot blast air can further assist drying.
  • a pressing pressure can be exerted on the tissue web via the contact pressure of the press belt lying outside the press roll due to the belt tension, which promotes dewatering.
  • the press belt in the wrap area of the press roll is associated with a water collecting device which absorbs the, driven by the blowing air through the press belt water.
  • the water collection device is designed as a suction device.
  • the vacuum of the suction device causes the suction of additional water from the belts and the tissue web into the water collecting device.
  • the pressing band can be designed as a stem.
  • the bands in front of the press roll together with the tissue web should at least wrap around a guide roll which is arranged on the side of the tissue web opposite the press roll.
  • the effect of the belt tension during the wrapping improves with decreasing diameter of the guide roller. Therefore, the diameter of the guide roll should be less than 800 mm.
  • the steam blower box should be arranged opposite the guide roller.
  • At least the press belt should after the press roll, preferably after the removal of the tissue web, wrap around a driven guide roll. Because of the high tensile strength of the press belt, it is particularly suitable for initiating the required drive power.
  • the band arranged between the tissue web and the press roll has a structured surface in the area of contact with the tissue web.
  • a simplification of the arrangement further results when the press roll is arranged above the tissue web. Tearing of the press belt thus does not affect the rest of the arrangement.
  • the tissue web 1 is guided by an air-permeable guide belt 2 starting from a headbox 11 of the production machine through a dewatering device according to the invention to a large drying cylinder 12, especially a Yankee cylinder.
  • the drying takes place, so that the tissue web 1 can subsequently be removed with the aid of a creping doctor and thereby creped. Thereafter, the reeling of the tissue web 1.
  • the dewatering device has a cylindrical and rotating pressure roller 5 arranged above the tissue web 1. This pressure roller 5 is looped around by the tissue web 1 together with the inner guide belt 2 and at least one outer and also air-permeable press belt 4.
  • the press roll 5 is designed as a blower roll with a perforated roll shell and directs hot blast air during wrapping in the direction of the tissue web 1. During this contiguous water is driven from the tissue web 1 in the band 4 and from this in a relation to the press roll 5 arranged water collecting device 6.
  • the water collecting device 6 is sucked.
  • a perforated suction pipe 9 running transversely to the web running direction 14 and connected to a vacuum source in the water collecting device 6.
  • the press belt 4 presses the tissue web 1 during the wrapping of the press roll 5 due to the belt tension against the guide belt 2, which leads to squeezing out of water from the tissue web 1. Because of the high tensile stresses, the press belt 4 must have a correspondingly high strength. For this particular bands or sieves are suitable.
  • the guide belt 2 continues the tissue web 1 alone up to the drying cylinder 12. There, the tissue web 1 is pressed against the drying cylinder 12 by a press roller 13 looped around by the guide belt 2. Because of the smooth surface of the drying cylinder 12, the fiber web 1 then adhere to this, so that the guide belt 2 can be wegge-leads.
  • the surface of the guide belt 2 is structured, so that during contact with the tissue web 1, in particular when the tissue web 1 is pressed against the press roller 5, a corresponding surface structure is formed in the tissue web 1.
  • the band 3 is formed in the interest of a higher water absorbency as felt.
  • the press belt 4 wraps together with the belt 3, the tissue web 1 and the guide belt 2 located here outside a guide roller 7. During this wrapping, there is already a pre-pressing of the tissue web.
  • the hot steam is directed to the guide belt 2 and this belt 2 and the tissue web 1 heats up.
  • both belts 3,4 can optionally be conditioned and returned to the guide roll 7.
  • the guide roller 7 in front of the press roller 5 has a diameter of less than 800 mm, which increases the effect of the belt tension on the tissue web 1.
  • the formation of the press roll 5 as a blow roll not only reduces the energy costs, it also reduces the risk of contamination in the perforation of the roll shell of the press roll. 5
  • the press belt 4 Since the press belt 4 is located below the tissue web 1, the risk for the large drying cylinder 12 is reduced in the event of a tear of the belt 4 due to the high belt tensions.

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  • Paper (AREA)

Claims (15)

  1. Dispositif d'égouttage d'une nappe de papier tissu (1) dans une machine de fabrication d'une telle nappe de papier tissu, dans lequel la nappe de papier tissu (1) entoure partiellement, avec de chaque côté au moins une bande perméable à l'air et entraînée en rotation sans fin (2, 3, 4), un cylindre de pressage cylindrique et rotatif (5), et
    le cylindre de pressage (5) est réalisé sous forme de cylindre de soufflage, qui dirige de l'air soufflé dans la région d'enveloppement vers la nappe de papier tissu, caractérisé en ce que dans la région d'enveloppement, du côté de la nappe de papier tissu (1) opposé au cylindre de pressage (5), sont disposées deux bandes (3, 4), la bande extérieure (4) formant une bande de pressage perméable à l'eau et la bande (3) disposée entre la nappe de papier tissu (1) et la bande de pressage (4), venant en contact avec la nappe de papier tissu (1), étant réalisée sous forme de feutre perméable à l'eau.
  2. Dispositif selon la revendication 1, caractérisé en ce que le cylindre de pressage (5) dirige de l'air de soufflage chaud vers la nappe de papier tissu (1).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'un dispositif de collecte d'eau (6) est associé à la bande de pressage (4) située à l'extérieur par rapport au cylindre de pressage (5) dans la région d'enveloppement du cylindre de pressage (5), lequel dispositif de collecte d'eau recueille l'eau entraînée par la bande de pressage (4).
  4. Dispositif selon la revendication 3, caractérisé en ce que le dispositif de collecte d'eau (6) est réalisé sous forme de dispositif aspirant.
  5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la bande de pressage (4) est réalisée sous forme de tamis.
  6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les bandes (2, 3, 4) avant le cylindre de pressage (5) entourent conjointement avec la nappe de papier tissu (1) au moins un cylindre conducteur (7) qui est disposé du côté de la nappe de papier tissu (1) opposé au cylindre de pressage (5).
  7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que dans la direction d'avance de la nappe (14) avant le cylindre de pressage (5) est disposée une caisse de soufflage de vapeur (8) qui sollicite la bande (2) venant en contact avec le cylindre de pressage (5) avec de la vapeur chaude.
  8. Dispositif selon les revendications 6 et 7, caractérisé en ce que la caisse de soufflage de vapeur (8) est disposée en regard du cylindre conducteur (7).
  9. Dispositif selon l'une quelconque des revendications 6 à 8, caractérisé en ce que le diamètre du cylindre conducteur (7) est inférieur à 800 mm.
  10. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins la bande de pressage (4) après le cylindre de pressage (5) entoure un cylindre conducteur entraîné (10).
  11. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'entre la nappe de papier tissu (1) et le cylindre de pressage (5) n'est disposée qu'une seule bande (2).
  12. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le cylindre de pressage (5) est disposé par-dessus la nappe de papier tissu (1).
  13. Machine de fabrication d'une nappe de papier tissu comprenant un dispositif selon l'une quelconque des revendications précédentes.
  14. Machine selon la revendication 13, caractérisée en ce que la bande (2) disposée entre le cylindre de pressage (5) et la nappe de papier tissu (1) guide la nappe de papier tissu (1) depuis une unité montée en amont, notamment une caisse de tête (11), jusqu'à une unité montée en aval, notamment un cylindre de séchage (12).
  15. Machine selon la revendication 13 ou 14, caractérisée en ce que la bande (2) disposée entre la nappe de papier tissu (1) et le cylindre de pressage (5) présente une surface structurée dans la région de contact avec la nappe de papier tissu (1).
EP20070107298 2006-05-05 2007-05-02 Dispositif d'égouttage Not-in-force EP1852551B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610021328 DE102006021328A1 (de) 2006-05-05 2006-05-05 Entwässerungsvorrichtung

Publications (2)

Publication Number Publication Date
EP1852551A1 EP1852551A1 (fr) 2007-11-07
EP1852551B1 true EP1852551B1 (fr) 2014-03-19

Family

ID=38169311

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070107298 Not-in-force EP1852551B1 (fr) 2006-05-05 2007-05-02 Dispositif d'égouttage

Country Status (2)

Country Link
EP (1) EP1852551B1 (fr)
DE (1) DE102006021328A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006062234A1 (de) 2006-12-22 2008-06-26 Voith Patent Gmbh Verfahren und Vorrichtung zur Trocknung einer Faserstoffbahn
DE102006062235A1 (de) * 2006-12-22 2008-06-26 Voith Patent Gmbh Verfahren und Vorrichtung zur Trocknung einer Faserstoffbahn
AT505760B1 (de) * 2008-01-09 2009-04-15 Andritz Ag Maschf Vorrichtung und verfahren zur entwasserung einer materialbahn
WO2015000690A1 (fr) * 2013-07-04 2015-01-08 Voith Patent Gmbh Procédé et dispositif compact de fabrication de non-tissé
EP3212843B1 (fr) * 2014-10-29 2018-07-18 Voith Patent GmbH Dispositif d'égouttage d'une bande de matière fibreuse

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303576A (en) * 1965-05-28 1967-02-14 Procter & Gamble Apparatus for drying porous paper
US3771236A (en) * 1971-01-12 1973-11-13 R Candor Method and apparatus for treating sheet-like material with fluid
US5814190A (en) * 1994-06-29 1998-09-29 The Procter & Gamble Company Method for making paper web having both bulk and smoothness
FR2733522B1 (fr) * 1995-04-28 1997-06-20 Kaysersberg Sa Procede et dispositif de fabrication d'une feuille de papier avec presechage par air traversant
DE10303959A1 (de) * 2003-01-31 2004-09-02 Voith Paper Patent Gmbh Verdrängungsentwässerungspresse
US7297233B2 (en) * 2004-01-30 2007-11-20 Voith Paper Patent Gmbh Dewatering apparatus in a paper machine

Also Published As

Publication number Publication date
DE102006021328A1 (de) 2007-11-08
EP1852551A1 (fr) 2007-11-07

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