EP1969178A1 - Machine a papier comportant un ou plusieurs dispositifs a soupapes - Google Patents

Machine a papier comportant un ou plusieurs dispositifs a soupapes

Info

Publication number
EP1969178A1
EP1969178A1 EP06841358A EP06841358A EP1969178A1 EP 1969178 A1 EP1969178 A1 EP 1969178A1 EP 06841358 A EP06841358 A EP 06841358A EP 06841358 A EP06841358 A EP 06841358A EP 1969178 A1 EP1969178 A1 EP 1969178A1
Authority
EP
European Patent Office
Prior art keywords
paper machine
piezo
paper
machine according
nozzle system
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.)
Withdrawn
Application number
EP06841358A
Other languages
German (de)
English (en)
Inventor
Jan Kabus
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1969178A1 publication Critical patent/EP1969178A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • D21F1/028—Details of the nozzle 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
    • D21F1/32—Washing wire-cloths or felts
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/04—Paper-break control devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G7/00—Damping devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/50—Spraying or projecting

Definitions

  • the invention relates to a paper machine with one or more valve devices.
  • valve devices In paper machines, paper, cardboard and / or paperboard is produced. In a paper machine, valve devices can be used at various locations.
  • a headbox device for a paper machine in which a plurality of nozzle systems designed as valve devices are used, from which liquid jets which are formed from stock suspension, come to the outside.
  • DE 31 44 066 C2 describes a headbox for a paper machine, wherein a valve device is provided which has a plurality of outlet nozzle opens into a turbulence tubes on ⁇ .
  • a nozzle for ei ⁇ nen floating dryer is known, which is used in a paper machine for non-contact drying of the paper web.
  • Vorrich ⁇ device for washing a felt which has a Ventilvor ⁇ direction with a washing nozzle.
  • Such felts and corresponding washing devices are used for example in the press section of a paper machine.
  • a nozzle for a floating dryer is known.
  • Floating dryers can be used in paper machines for non-contact drying of a paper web.
  • the well-known from DE 29 17 765 C2 designed as a nozzle valve device serves to direct a drying and supporting gas flow against a paper web to be dried.
  • EP 0051654 Bl is a cylinder dryer for a paper machine is known which has one or more than Lucasstrahlele ⁇ mente valve devices formed.
  • From DE 32 18 306 C2 discloses a separating and guiding device for a separated from a paper web end for transferring a paper web insertion strip is known, wherein the separating and guiding device comprises valve devices, by means of which a deflected paper web is exposed to such opposite air streams, that the Pa ⁇ pierbahn due to the tension acting on them is broken.
  • the installation positions of the valve devices in a paper machines ne are for example known from the aforementioned documents, are characterized by relatively rough environmentssbe ⁇ conditions such as high humidity, ⁇ temperatures partially very high environmental, exposure to chemicals and / or contamination, for example by paper fibers from , Currently, mechanical valve devices in paper machines and / or electromechanical are used, which are relatively susceptible to interference, whereby loss of production and quality ⁇ losses in the paper machine due be.
  • the object of the invention is to increase the productivity and quality in the operation of a paper machine.
  • This object is achieved by a paper machine with egg ⁇ ner or more valve devices, wherein at least one valve device has at least one piezo nozzle system.
  • Piezo-jet systems have machine when used in a Textilma ⁇ surprisingly provides a much more reliable than previously used electromechanical valvesppge-.
  • Paper machine can also increase the accuracy and the dynamics of the regulation of the running in the paper machine processes.
  • a paper machine with at least one designed as a piezo nozzle system valve device works much more reliable and is more robust than known paper machines. According to the invention, the availability and stability of the paper machine is increased.
  • the piezo-nozzle system can alswei ⁇ sen several zones, which can be controlled to influence the flow rate of the respective zone.
  • the possible number of zones can be substantially increased. Resolution and control quality are increased. The play of the actuators of the valve device is reduced.
  • At least one piezo-nozzle system for applying pulp to a sieve may be provided in the region of the head box.
  • the orientation of the fiber during the application of the material can be influenced by specific activation patterns, as a result of which other paper parameters such as, for example, longitudinal and transverse strength can also be better controlled.
  • the piezo nozzle system may preferably be designed to influence the fiber orientation.
  • At least one piezo nozzle system for coating paper can be provided.
  • the piezo nozzle system can be designed for applying glue.
  • the piezo nozzle system can be designed for applying dye.
  • At least one piezo nozzle system for moistening paper can be provided.
  • At least one piezo-nozzle system can be provided for cleaning a sieve.
  • at least one piezo-nozzle system can be provided, with the aid of which a jet, for example a water jet or an air jet, is formed or shaped for cutting paper.
  • FIG. 1 shows schematically a paper machine.
  • the paper machine may have a fabric center 3, the raw materials 2 such as waste paper, pulp and / or wood pulp are supplied.
  • non-paper components for example ⁇ sorted out in a sorter 4.
  • the headbox 5 of the paper machine distributes a from the raw materials 2 with the addition of water, optionally also with the addition of fillers and / or excipients formed pulp-water suspension 7 evenly across the width of at least one screen 10 of the wire section 6 of the paper machine.
  • the screen 10 is formed in the example shown as an extremely fine continuous sieve, which is constantly moving and before ⁇ preferably also shaken laterally.
  • the fabric from the head box 5 ⁇ exiting pulp ie, the fiber-water suspension 7 can have up to 99% water or more.
  • the fibers become matted into a unitary paper web 1. Excess water runs through the wire 10.
  • the running in the wire section 6 water is referred to as white water 9.
  • the water content of the paper web 1 may typically be about 80%.
  • the paper web 1 is then already strong enough to remove it from the wire 10 and to guide it by means of felt belts in the subsequent press section 11.
  • the paper web 1 is further Entskys ⁇ sert.
  • the water content of the paper web 1 can be example ⁇ be reduced to 50%.
  • the effluent in the press section 11 water is also referred to as press water 12.
  • White water 9 and press water 12 the stock preparation, ie the center of material 3, the sorter 4 and / or the headbox 5 are fed directly or via a so-called scavenger 14 as circulating water 16.
  • Wastewater 15 is preferably fed to a treatment plant.
  • the paper web 1 is preferably passed through rolls of steel, granite and / or hard rubber by means of an absorbent endless felt cloth and thereby dehydrated.
  • the pressing process compresses the paper structure, the strength increases and the surface quality is decisively influenced.
  • the following generally to the press section 11 dry ⁇ aggr 13 is often the longest part of the paper machine.
  • water is evaporated from the paper web 1.
  • the paper web passes through several preferably steam-heated drying cylinders.
  • the raw paper can dry evenly and has at the end of the drying section 13 usually a residual moisture of a few percent.
  • the resulting water vapor ⁇ is sucked out of a non-illustrated closed dryer hood and transferred to a heat recovery system ge ⁇ . It is no exception that a dryer section 13 has up to one hundred or more steam-heated drying cylinders.
  • the paper web 1 is usually wound on a spool 8 at the end of the paper machine.
  • a Textilmaschi ⁇ ne may have a not shown in detail in the drawing Glätt ⁇ work, which is usually downstream of the dryer section 13 and the tambour 8 upstream.
  • a calender usually consists of several in the drawing not shown, superposed rollers that give the web a smooth surface and a uniform sheet thickness.
  • a paper machine is understood to mean a series connection of several units.
  • a paper machine has at least two of the following Aggrega ⁇ te on headbox 5, 6 wire section, press section 11, drying section 13, and smoothing unit with reel spool. 8
  • valve devices with piezo nozzle systems can be used at different locations:
  • the pulp-water suspension 7 or the pulp emerges from a nozzle designed as a valve ⁇ device.
  • This valve device may have one or more piezo nozzles, not shown in more detail. In this case, can form, for example, transverse and / or perpendicular to the paper web 1 is ⁇ can be arranged preferably a plurality of piezo nozzle zones.
  • the valve devices of the headbox 5 are preferably arranged on the so-called Hedbox, which corresponds in the drawing substantially the upper, in particular the "nose-shaped" formed part of the headbox 5.
  • Piezo-nozzle systems can also be used to clean and keep clean sieves 10 of the wire section 6 and / or press felts of
  • Piezo nozzle systems are eg Sonder effective to be ⁇ clean the screen used 10th
  • several piezoelectric nozzles can be arranged transversely to the paper web 1 in order to clean the wire 10.
  • air is preferably continuously blown across the width of the running ⁇ sieve, whereby the water and dirt particles located in the screen are removed.
  • Piezo nozzle systems can also be used to clean rolls, for example suction rolls in the wire and / or press section 6 or 11.
  • the paper web 1 is often moistened.
  • piezo nozzle systems are used, depending on the installation ⁇ place for moisture cross-profiling, curl reduction and / or remoistening.
  • a higher paper quality is achieved, whereby, for example, the winding of the paper web 1 is improved, and breaks are reduced.
  • Piezo nozzle systems can also be used for cutting the paper web 1.
  • the paper web 1 is cut through water and / or air emerging from piezo nozzles.
  • a piezo-nozzle system With the help of a piezo-nozzle system, a fine, targeted ⁇ directed water jet can be formed, which cuts the paper web clean, precise and dust-free with optimal water pressure.
  • Such a cutting system for a paper web with the aid of one or more piezo-nozzle systems is particularly suitable for cutting the edges of a paper web 1.
  • a high-quality dyeing and / or glue coating of the paper web 1 can also take place.
  • coating units or size presses are preferably provided in the paper machine.
  • Gluing and / or coating with the color of the paper web is preferably carried out after or during the drying process.
  • a paper web 1 in a particularly uniform and precisely controllable layer thickness be ⁇ be coated.
  • the piezo-jet systems in the paper machine are designed for substantially larger flow rates than piezo jet systems, which are used for example in the automotive industry, designed in the gel ⁇ Re.
  • the valve devices of the paper machine can also be formed much more compact than previously possible.
  • the invention relates to the use of a piezo nozzle system in a paper machine.
  • Piezo nozzle systems have proved to be particularly suitable for the extreme environmental conditions in a paper machine.
  • the use of piezo nozzle systems makes it possible to achieve very high control accuracy and dynamics when using controlled or regulated valve devices in a paper machine.
  • high availability and stability with robust and extremely Kompak ⁇ th design of the corresponding valve devices is ensured by the use of piezo nozzle systems.

Landscapes

  • Paper (AREA)

Abstract

L'invention concerne l'utilisation d'un système de buses piézoélectriques dans une machine à papier. Contre toute attente, les systèmes de buses piézoélectriques se sont révélés particulièrement adaptés aux conditions extrêmes d'une machine à papier. Notamment en dépit de l'humidité élevée, l'utilisation de systèmes de buses piézoélectriques permet d'obtenir une grande précision de régulation et une bonne dynamique lors de l'utilisation de dispositifs à soupapes commandés ou régulés dans une machine à papier. L'utilisation de systèmes de buses piézoélectriques permet par ailleurs de garantir une grande disponibilité et une bonne résistance pour une conception robuste et particulièrement compacte des dispositifs à soupapes correspondants.
EP06841358A 2005-12-19 2006-12-14 Machine a papier comportant un ou plusieurs dispositifs a soupapes Withdrawn EP1969178A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005060715A DE102005060715A1 (de) 2005-12-19 2005-12-19 Papiermaschine mit einer oder mehreren Ventilvorrichtungen
PCT/EP2006/069701 WO2007071612A1 (fr) 2005-12-19 2006-12-14 Machine a papier comportant un ou plusieurs dispositifs a soupapes

Publications (1)

Publication Number Publication Date
EP1969178A1 true EP1969178A1 (fr) 2008-09-17

Family

ID=37908116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06841358A Withdrawn EP1969178A1 (fr) 2005-12-19 2006-12-14 Machine a papier comportant un ou plusieurs dispositifs a soupapes

Country Status (8)

Country Link
US (1) US20080314538A1 (fr)
EP (1) EP1969178A1 (fr)
JP (1) JP2009520114A (fr)
CN (1) CN101341290A (fr)
BR (1) BRPI0620057A2 (fr)
CA (1) CA2633480A1 (fr)
DE (1) DE102005060715A1 (fr)
WO (1) WO2007071612A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT520935B1 (de) * 2018-11-08 2019-09-15 Andritz Ag Maschf Vorrichtung und Verfahren zum Überführen eines Streifens

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9481777B2 (en) 2012-03-30 2016-11-01 The Procter & Gamble Company Method of dewatering in a continuous high internal phase emulsion foam forming process
SE2330305A1 (en) * 2023-06-29 2024-12-30 Stora Enso Oyj A method for producing a microfibrillated cellulose web

Family Cites Families (18)

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Publication number Priority date Publication date Assignee Title
DE1141525B (de) * 1960-02-10 1962-12-20 Doerries A G O Vorrichtung zum Reinigen der Filze von Papier-, Karton- oder dergleichen Maschinen
SE402138B (sv) * 1976-10-18 1978-06-19 Karlstad Mekaniska Ab Spritsrorsanordning for rengorign av viror, filtar och dylikt i pappers- och liknande maskiner
FI68723C (fi) * 1978-05-04 1985-10-10 Valmet Oy Dysa foer svaevtork
AT378793B (de) * 1981-05-14 1985-09-25 Escher Wyss Gmbh Stoffauflaufvorrichtung fuer papiermaschinen
FI62695C (fi) * 1981-05-15 1983-02-10 Valmet Oy Anordning i en pappersmaskin foer kapning och styrning av en pappersbanans kantremsa
DE3144066C2 (de) * 1981-11-06 1985-10-31 J.M. Voith Gmbh, 7920 Heidenheim "Stoffauflauf für eine Papiermaschine"
DE3808050A1 (de) * 1988-03-11 1989-09-21 Escher Wyss Gmbh Vorrichtung zum einstellen einer blendenklinge
JPH0777720B2 (ja) * 1988-11-22 1995-08-23 工業技術院長 ウォータージェット用ノズル
US5234172A (en) * 1991-02-01 1993-08-10 The Black Clawson Company High pressure water jet comminuting
DE4441217C2 (de) * 1993-12-17 1998-09-10 Voith Sulzer Papiermasch Gmbh Verfahren zur Dämpfung von Druckstößen sowie Vorrichtung zur Durchführung des Verfahrens
US5622599A (en) * 1994-06-28 1997-04-22 Sproule; Barry Method and apparatus for coating pulp products
US5863387A (en) * 1997-05-01 1999-01-26 Voith Sulzer Technology North America, Inc Ultrasonic device for deflocculating fiber suspension in a paper-making machine headbox nozzle
US20040238136A1 (en) * 2003-05-16 2004-12-02 Pankaj Patel Materials and methods for manufacturing cigarettes
DE10224128A1 (de) * 2002-05-29 2003-12-18 Schmid Rhyner Ag Adliswil Verfahren zum Auftrag von Beschichtungen auf Oberflächen
DE10249820A1 (de) * 2002-10-25 2004-05-13 Voith Paper Patent Gmbh Verfahren zur Beeinflussung der Faserorientierung in einer aus mindestens einer Faserstoffsuspension hergestellten Faserstoffbahn und Stoffauflauf zur Durchführung des Verfahrens
US7008507B2 (en) * 2002-12-31 2006-03-07 Kimberly-Clark Worldwide, Inc. Non-impact printing method for applying compositions to webs and products produced therefrom
US7306699B2 (en) * 2002-12-31 2007-12-11 Kimberly-Clark Worldwide, Inc. Tissue product containing a topical composition in the form of discrete droplets
US6991706B2 (en) * 2003-09-02 2006-01-31 Kimberly-Clark Worldwide, Inc. Clothlike pattern densified web

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007071612A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT520935B1 (de) * 2018-11-08 2019-09-15 Andritz Ag Maschf Vorrichtung und Verfahren zum Überführen eines Streifens
AT520935A4 (de) * 2018-11-08 2019-09-15 Andritz Ag Maschf Vorrichtung und Verfahren zum Überführen eines Streifens

Also Published As

Publication number Publication date
CN101341290A (zh) 2009-01-07
DE102005060715A1 (de) 2007-06-21
JP2009520114A (ja) 2009-05-21
US20080314538A1 (en) 2008-12-25
BRPI0620057A2 (pt) 2011-11-01
WO2007071612A1 (fr) 2007-06-28
CA2633480A1 (fr) 2007-06-28

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