EP2784213B1 - Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn - Google Patents

Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn 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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English (en)
French (fr)
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EP2784213A1 (de
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
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Priority to EP13161554.4A priority Critical patent/EP2784213B1/de
Priority to CN201410090206.8A priority patent/CN104074089A/zh
Publication of EP2784213A1 publication Critical patent/EP2784213A1/de
Application granted granted Critical
Publication of EP2784213B1 publication Critical patent/EP2784213B1/de
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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. Stoffauflaufstruktur für eine Faserbahnmaschine, mit einem Stoffauflauf, der einen Turbulenzgenerator und eine Düsenkammer aufweist, die zwei konvergierende Wände (21, 22) aufweist, die einen Düsenauslass (24) ausbilden,
    wobei der Turbulenzgenerator zumindest drei Diffuser (1, 3, 5, 7, 9) aufweist, die eine Turbulenz in Flüssigkeiten erzeugen, die in jeden entsprechendem Diffuser (1, 3, 5, 7, 9) über ein Zufuhrmittel (25, 27, 29) zugeführt werden, um eine Pulpesuspension und/oder Wasser als die Flüssigkeiten zuzuführen, wobei jeder der Diffusoren (1, 3, 5, 7, 9) einen Auslass in die Düsenkammer (24) aufweist,
    einem zentralen Diffuser (1) von den zumindest drei Diffusoren (1, 3, 5, 7, 9), der zwei Klingen (11, 13) an seinem Auslass angeordnet aufweist, die sich in die Düsenkammer in einer konvergierenden Weise erstrecken, wobei die Klingen (11, 13) eine durch den zentralen Diffuser (1) strömende Flüssigkeit von durch angrenzende Diffusoren (3, 5, 7, 9) strömenden Flüssigkeiten trennen, wobei
    einer oder mehrere der angrenzenden Diffusoren (3, 5, 7, 9) eine zusätzliche an dem Auslass angeordnete Klinge (15, 17) aufweist, und die zusätzliche Klinge (15, 17) eine kürzere Länge als die angrenzende Klingen (11, 13) des zentralen Diffusers (1) aufweist
    dadurch gekennzeichnet, dass
    der zentrale Diffuser (1) mit einem Zufuhrmittel (29) verbunden ist, das Frischwasser, Dilutionswasser und/oder Siebwasser in den zentralen Diffuser (1) zuführt.
  2. Stoffauflaufstruktur für eine Faserbahnmaschine nach Anspruch 1, wobei die Klingen (11, 13, 15, 17) in einer gestuften Weise angeordnet sind.
  3. Stoffauflaufstruktur für eine Faserbahnmaschine nach einem der vorangehenden Ansprüche, wobei zumindest die Klingen (11, 13) des zentralen Diffusers sich über die Düsenkammer hinaus zu einem Äußeren des Stoffauflaufs erstrecken.
  4. Stoffauflaufstruktur für eine Faserbahnmaschine nach einem der Ansprüche 1 und 2, wobei die Spitzen (11a, 13a) der Klingen des zentralen Diffusers (1) innerhalb der Düsenkammer angeordnet sind, und ein Abstand zwischen den Spitzen der Klingen (11, 13) und dem Auslass zwischen 1 und 50 mm eingestellt ist.
  5. Stoffauflaufstruktur für eine Faserbahnmaschine nach einem der vorangehenden Ansprüche, wobei die Klingen (11, 13, 15, 17) in einer gekippten Weise an dem entsprechenden Diffuserauslass montiert sind.
  6. Stoffauflaufstruktur für eine Faserbahnmaschine nach einem der vorangehenden Ansprüche, wobei die Wandoberflächen von jedem der Diffusoren (1, 3, 5, 7, 9) wie auch der Klingen (11, 13, 15, 17) eine glatte und gleichförmige Struktur aufweisen.
  7. Stoffauflaufstruktur für eine Faserbahnmaschine nach einem der vorangehenden Ansprüche, wobei eine anpassbare Auslaufspaltlippe (23) an dem Düsenauslass (24) bereitgestellt ist.
  8. Stoffauflaufstruktur für eine Faserbahnmaschine nach einem der vorangehenden Ansprüche, wobei jede Klinge (11, 13, 15, 17) einen keilförmigen Querschnitt aufweist.
  9. Stoffauflaufstruktur für eine Faserbahnmaschine nach einem der vorangehenden Ansprüche, wobei die Dicke der Klingenspitze (11a, 13a, 15a, 17a) von jeder Klinge (11, 13, 15, 17) weniger als 0,5 mm, bevorzugt weniger als 0,3 mm beträgt.
  10. Stoffauflaufstruktur für eine Faserbahnmaschine nach einem der vorangehenden Ansprüche, wobei der Stoffauflauf ein Mehrschicht-Stoffauflauf ist.
  11. Stoffauflaufstruktur für eine Faserbahnmaschine nach einem der vorangehenden Ansprüche, wobei der zentrale Diffuser (1) lediglich eine Reihe Diffuserrohre hat.
  12. Stoffauflaufstruktur für eine Faserbahnmaschine nach einem der vorangehenden Ansprüche, wobei jeder der angrenzenden Diffusoren zumindest zwei Reihen Diffuserrohre (3, 5, 7, 9) hat.
  13. Stoffauflaufstruktur für eine Faserbahnmaschine nach Anspruch 11, wobei die zusätzlichen Klingen (15, 17) an den Auslässen von jedem der Diffuserrohre (3, 5, 7, 9) montiert sind.
  14. Stoffauflaufstruktur für eine Faserbahnmaschine nach einem der Ansprüche 1 bis 13, wobei die Länge der zusätzlichen Klinge (15, 17) zwischen 50% bis 95% der Länge der Klingen (11, 13) des zentralen Diffusers liegt.
EP13161554.4A 2013-03-28 2013-03-28 Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn Active EP2784213B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13161554.4A EP2784213B1 (de) 2013-03-28 2013-03-28 Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn
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 (de) 2013-03-28 2013-03-28 Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn

Publications (2)

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

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EP13161554.4A Active EP2784213B1 (de) 2013-03-28 2013-03-28 Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn

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EP (1) EP2784213B1 (de)
CN (1) CN104074089A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3540118A1 (de) 2018-03-15 2019-09-18 Valmet Technologies Oy Faserbahnmaschine und verfahren zur herstellung einer mehrlagigen bahn

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3012370B1 (de) * 2014-10-22 2018-08-15 Valmet Technologies, Inc. Klärschlammrecyclingvorrichtung und -verfahren zur Wiederverwendung von Klärschlamm
WO2018229333A1 (en) * 2017-06-14 2018-12-20 Kemira Oyj Method for increasing the strength properties of a paper or board product
EP3540117B1 (de) * 2018-03-15 2023-07-26 Valmet Technologies Oy Mehrschichtiger stoffauflauf für eine maschine zur herstellung einer faserstoffbahn und verfahren zur bidung einer faserstoffbahn in einer formierpartie einer maschine zur herstellung einer faserstoffbahn
EP3540119B1 (de) * 2018-03-15 2023-08-02 Valmet Technologies Oy Faserbahnmaschine und verfahren zur herstellung einer mehrlagigen bahn
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 (de) * 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
JPWO2006038285A1 (ja) * 2004-10-05 2008-05-29 三菱重工業株式会社 抄紙機のフローシート及びその製造方法
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 (de) 2018-03-15 2019-09-18 Valmet Technologies Oy Faserbahnmaschine und verfahren zur herstellung einer mehrlagigen bahn

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EP2784213A1 (de) 2014-10-01
CN104074089A (zh) 2014-10-01

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