EP2784213B1 - Caisse de tête pour une machine de production d'une bande de matière fibreuse - Google Patents

Caisse de tête pour une machine de production d'une bande de matière fibreuse Download PDF

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Publication number
EP2784213B1
EP2784213B1 EP13161554.4A EP13161554A EP2784213B1 EP 2784213 B1 EP2784213 B1 EP 2784213B1 EP 13161554 A EP13161554 A EP 13161554A EP 2784213 B1 EP2784213 B1 EP 2784213B1
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EP
European Patent Office
Prior art keywords
headbox
blades
fiber web
diffuser
machine according
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.)
Active
Application number
EP13161554.4A
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German (de)
English (en)
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EP2784213A1 (fr
Inventor
Sami Anttilainen
Janne Lappi
Jussi Vasara
Riikka Antikainen
Leif Piippola
Hannu Turpeinen
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.)
Valmet Technologies Oy
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Valmet Technologies Oy
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Publication date
Application filed by Valmet Technologies Oy filed Critical Valmet Technologies Oy
Priority to EP13161554.4A priority Critical patent/EP2784213B1/fr
Priority to CN201410090206.8A priority patent/CN104074089A/zh
Publication of EP2784213A1 publication Critical patent/EP2784213A1/fr
Application granted granted Critical
Publication of EP2784213B1 publication Critical patent/EP2784213B1/fr
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/026—Details of the turbulence section
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/028—Details of the nozzle section

Definitions

  • a headbox structure basically serves to supply mainly liquid substances such as water and/or a pulp suspension liquid onto a wire of a forming section.
  • Additives such as refined fibers, fillers, cationic polymers such as cationic starch, etc. are added to the water and/or pulp suspension liquid.
  • These liquid substances are fed to the headbox by means of a water supply or feed water supply.
  • the substances applied onto a forming wire are then dewatered to form a web. This is then further transferred to a press section for additional dewatering and a dryer section in which the formed web is dried to form a paper or board web. Further treatment depends on the respective requirements of the product.
  • a headbox structure for a fiber web machine comprises a headbox having a turbulence generator and a nozzle chamber having two converging walls forming a nozzle outlet.
  • the turbulence generator has at least three diffusers creating turbulence in liquids supplied into each respective diffuser via feeding means for feeding pulp suspension and/or water as these liquids. Furthermore, each of the diffusers has an outlet into the nozzle chamber.
  • the slice lip reach which is known as the extent the slice lip is projecting into the liquid flow, is preferably 1 - 10 mm.
  • a headbox comprises headbox headers 39, 41, and 43, a manifold in which manifold pipes 25, 27, and 29 are provided, a diffuser chamber in which diffuser tubes 1, 3, 5, 7, and 9 are provided, and a nozzle chamber having converging walls 21, 22 forming a slice opening (nozzle outlet) 24.
  • Manifold pipes 25, 27, and 29 establish communication from the headers 39, 41, and 43 to the diffuser tubes 1, 3, 5, 7, and 9. Blades 11, 13, 15, and 17 are respectively attached to outlets of the diffuser tubes 1, 3, 5, 7, and 9 via joints 31, 33, 35 and 37.
  • the liquids are ejected via slice opening 24 in a layered manner onto a wire or fabric of a forming section for further treatment, such as dewatering, pressing and drying.
  • the distance from the tip ends 11a, 13b of blades 11, 13 to the forming section is short for ensuring the layered structure. Since thin blade tip ends 11a, 13a improve a layered structure of the web to a greater extent, the thickness of the blade tip end is less than 0,5 mm, preferably less than 0,3 mm.
  • a slice lip 23 is provided at the upper nozzle chamber wall 22.
  • Slice lip 23 can be adjusted in its position, i.e. in particular its reach can be adjusted by known means such as horizontal or vertical slice positioners, micro adjusters, etc. To simplify matters, these are not shown in the drawing.
  • a slice reach R is preferably 1 - 10 mm, thereby advantageously acting on the ejected liquid flow (also referred to as "free jet") without affecting the purity of the individual liquid layers. Accordingly, by means of the headbox structure according to the invention, it is possible to influence the ejected liquid flow to a much higher degree than is known from the prior art.

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Claims (14)

  1. Structure de caisse de tête pour une machine à bobine de fibre, comprenant une caisse de tête ayant un générateur de turbulences et une chambre de buse ayant deux parois convergentes (21, 22) formant une sortie de buse (24),
    le générateur de turbulence ayant au moins trois diffuseurs (1, 3, 5, 7, 9) créant des turbulences dans les liquides fournis dans chaque diffuseur respectif (1, 3, 5, 7, 9) par le biais de moyens d'alimentation (25, 27, 29) pour alimenter une suspension de pâte et/ou de l'eau comme liquides, chacun des diffuseurs (1, 3, 5, 7, 9) ayant une sortie dans la chambre de buse (24),
    un diffuseur central (1) desdits au moins trois diffuseurs (1, 3, 5, 7, 9) ayant deux lames (11, 13) disposées à sa sortie et s'étendant dans la chambre de buse de manière convergente, les lames (11, 13) séparant un liquide s'écoulant à travers le diffuseur central (1) des liquides s'écoulant à travers des diffuseurs adjacents (3, 5, 7, 9), dans laquelle
    un ou plusieurs diffuseurs adjacents (3, 5, 7, 9) ont une lame supplémentaire (15, 17) disposée à la sortie et la lame supplémentaire (15, 17) a une longueur inférieure à la lame adjacente (11, 13) du diffuseur central (1)
    caractérisée en ce que
    le diffuseur central (1) est raccordé avec des moyens d'alimentation (29) alimentant de l'eau douce, de l'eau de dilution et/ou de l'eau blanche dans le diffuseur central (1).
  2. Structure de caisse de tête pour une machine à bobine de fibre selon la revendication 1, dans laquelle les lames (11, 13, 15, 17) sont disposées en quinconce.
  3. Structure de caisse de tête pour une machine à bobine de fibre selon l'une quelconque des revendications précédentes, dans laquelle au moins les lames (11, 13) du diffuseur central s'étendent au-delà de la chambre de buse vers l'extérieur de la caisse de tête.
  4. Structure de caisse de tête pour une machine à bobine de fibre selon l'une quelconque des revendications 1 et 2, dans laquelle les pointes (11a, 13a) des lames du diffuseur central (1) sont disposées à l'intérieur de la chambre de buse, et une distance entre les pointes des lames (11, 13) et la sortie est établie entre 1 et 50 mm.
  5. Structure de caisse de tête pour une machine à bobine de fibre selon l'une quelconque des revendications précédentes, dans laquelle les lames (11, 13, 15, 17) sont montées sur la sortie respective du diffuseur de manière pivotante.
  6. Structure de caisse de tête pour une machine à bobine de fibre selon l'une quelconque des revendications précédentes, dans laquelle les surfaces de paroi de chacun des diffuseurs (1, 3, 5, 7, 9) ainsi que celles des lames (11, 13, 15, 17) ont une structure lisse et uniforme.
  7. Structure de caisse de tête pour une machine à bobine de fibre selon l'une quelconque des revendications précédentes, dans laquelle un rebord en couronne ajustable (23) est ménagé à la sortie de la buse (24).
  8. Structure de caisse de tête pour une machine à bobine de fibre selon l'une quelconque des revendications précédentes, dans laquelle chaque lame (11, 13, 15, 17) a une coupe transversale en forme de coin.
  9. Structure de caisse de tête pour une machine à bobine de fibre selon l'une quelconque des revendications précédentes, dans laquelle l'épaisseur de la pointe de lame (11a, 13a, 15a, 17a) de chaque lame (11, 13, 15, 17) est inférieure à 0,5 mm, de préférence inférieure à 0,3 mm.
  10. Structure de caisse de tête pour une machine à bobine de fibre selon l'une quelconque des revendications précédentes, dans laquelle la caisse de tête est une caisse de tête à couches multiples.
  11. Structure de caisse de tête pour une machine à bobine de fibre selon l'une quelconque des revendications précédentes, dans laquelle le diffuseur central (1) contient uniquement une rangée de tubes diffuseurs.
  12. Structure de caisse de tête pour une machine à bobine de fibre selon l'une quelconque des revendications précédentes, dans laquelle chacun des diffuseurs adjacents contient au moins deux rangées de tubes diffuseurs (3, 5, 7, 9).
  13. Structure de caisse de tête pour une machine à bobine de fibre selon la revendication 11, dans laquelle lesdites lames supplémentaires (15, 17) sont montées sur les sorties de chacun des tubes diffuseurs (3, 5, 7, 9).
  14. Structure de caisse de tête pour une machine à bobine de fibre selon l'une quelconque des revendications 1 à 13, dans laquelle la longueur de la lame supplémentaire (15, 17) est comprise entre 50 % et 95 % de la longueur des lames (11, 13) du diffuseur central.
EP13161554.4A 2013-03-28 2013-03-28 Caisse de tête pour une machine de production d'une bande de matière fibreuse Active EP2784213B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13161554.4A EP2784213B1 (fr) 2013-03-28 2013-03-28 Caisse de tête pour une machine de production d'une bande de matière fibreuse
CN201410090206.8A CN104074089A (zh) 2013-03-28 2014-03-12 用于纤维幅材机的流浆箱结构

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13161554.4A EP2784213B1 (fr) 2013-03-28 2013-03-28 Caisse de tête pour une machine de production d'une bande de matière fibreuse

Publications (2)

Publication Number Publication Date
EP2784213A1 EP2784213A1 (fr) 2014-10-01
EP2784213B1 true EP2784213B1 (fr) 2016-05-18

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EP13161554.4A Active EP2784213B1 (fr) 2013-03-28 2013-03-28 Caisse de tête pour une machine de production d'une bande de matière fibreuse

Country Status (2)

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EP (1) EP2784213B1 (fr)
CN (1) CN104074089A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3540118A1 (fr) 2018-03-15 2019-09-18 Valmet Technologies Oy Machine à bande fibreuse et procédé de formation d'une bande multicouche

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3012370B1 (fr) * 2014-10-22 2018-08-15 Valmet Technologies, Inc. Appareil de recyclage de boues de déchets et procédé de recyclage de boues résiduaires
CN110730842B (zh) 2017-06-14 2022-05-10 凯米拉公司 提高纸或纸板产品的强度性能的方法
EP3540117B1 (fr) * 2018-03-15 2023-07-26 Valmet Technologies Oy Caisse de tête multicouche d'une machine de fabrication d'une bande de matière fibreuse et procédé de formation d'une bande de matière fibreuse dans une section de formation d'une machine de production d'une bande de matière fibreuse
FI3540119T3 (fi) * 2018-03-15 2023-09-21 Valmet Technologies Oy Kuiturainakone ja menetelmä monikerroksisen rainan muodostamiseksi
FI20195568A1 (en) * 2019-06-27 2020-12-28 Valmet Technologies Oy Method for forming a multilayer board web and forming portion for forming a multilayer board web

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923593A (en) * 1971-12-03 1975-12-02 Beloit Corp Multiple ply web former with divided slice chamber
FI379674A (fr) * 1974-01-17 1975-07-18 Beloit Corp
US4376014A (en) * 1979-04-12 1983-03-08 Beloit Corporation Headbox for forming multi-ply sheets
US5133836A (en) * 1991-09-20 1992-07-28 Kimberly-Clark Corporation Papermaking headbox having extended divider sheet
FI116470B (fi) * 1999-10-04 2005-11-30 Metso Paper Inc Menetelmä paperirainan muodostamiseksi
US6846386B2 (en) * 2000-06-22 2005-01-25 Metso Paper Karlstad Ab Method of ensuring flatness of a vane in a headbox by means of a mounting arrangement, headbox with such a mounting arrangement, a mounting arrangement and vane therefor
US7785446B2 (en) * 2004-10-05 2010-08-31 Toray Industries, Inc. Flow sheet for paper machine and method of manufacturing the same
DE102008000778A1 (de) 2008-03-20 2009-09-24 Voith Patent Gmbh Stoffauflauf für eine Papier- oder Kartonmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3540118A1 (fr) 2018-03-15 2019-09-18 Valmet Technologies Oy Machine à bande fibreuse et procédé de formation d'une bande multicouche

Also Published As

Publication number Publication date
EP2784213A1 (fr) 2014-10-01
CN104074089A (zh) 2014-10-01

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