EP2155961A2 - Procédé et dispositif pour produire une bande de matière fibreuse - Google Patents

Procédé et dispositif pour produire une bande de matière fibreuse

Info

Publication number
EP2155961A2
EP2155961A2 EP08760337A EP08760337A EP2155961A2 EP 2155961 A2 EP2155961 A2 EP 2155961A2 EP 08760337 A EP08760337 A EP 08760337A EP 08760337 A EP08760337 A EP 08760337A EP 2155961 A2 EP2155961 A2 EP 2155961A2
Authority
EP
European Patent Office
Prior art keywords
fibrous web
temperature
drying device
temperature drying
cylinder
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.)
Ceased
Application number
EP08760337A
Other languages
German (de)
English (en)
Inventor
John Bergman
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 EP2155961A2 publication Critical patent/EP2155961A2/fr
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • D21F5/02—Drying on cylinders
    • 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
    • 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
    • D21F5/004—Drying webs by contact with heated surfaces or materials
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper

Definitions

  • the invention relates to a method and an apparatus for the production of a fibrous web, in particular a graphic paper web.
  • the advantage of such a condensation drying concept is that the surface of a respective side of the paper web is significantly densified and smoothed by softening and fixing the lignin to the fibers.
  • the smoothing process is satisfactory only in the context of a wood-containing furnish such as GW (Ground Wood, Groundwood), TGW (Thermo Ground Wood, Thermo-Hoizschltff), and PGW (Pressure Ground Wood) where sufficient lignin is present on the fibers is. With such substance entries, the smoothing potential is outstanding.
  • GW Round Wood, Groundwood
  • TGW Thermo Ground Wood, Thermo-Hoizschltff
  • PGW Pressure Ground Wood
  • the pulp BCTMP (Bleached Chemi-Thermo-Mechanicai PuIp) is a bleached refiner pulp using pressure and heat as well as chemical action;
  • the pulp CTMP (Chemi-Thermo-Mechanical PuIp) is a refiner pulp using pressure and heat as well as chemical action and
  • APMP Aikaline 0 Peroxide Mechanical PuIp pulp with a refiner wood pulp with previous alkaline peroxide treatment to improve the lignin solution.
  • the fabric already contains up to 40 to 50% of these fibers combined with kraft pulp. Future development is likely to involve varieties accounting for up to 80-90% of BCTMP and APMP fibers. 5
  • the lignin adheres to the fibers. When the lignin softens and the fibers are "melted together," significantly improved results mechanical strength values, which include, for example, the Scott bond, the tensile strength and the tear strength.
  • the invention has for its object to provide an improved method and an improved device of the type mentioned, with which in particular the Festägkeitseige ⁇ schaften such as fiber bonding and surface smoothness for optimum coating of the fibrous web can be improved and energy saved.
  • the Festägkeitseige ⁇ schaften such as fiber bonding and surface smoothness for optimum coating of the fibrous web can be improved and energy saved.
  • the paper machine in question can be built shorter and thus space can be saved.
  • This object is achieved by a method for producing a fibrous web, in particular graphic paper web, from a composition of matter, which consists of at least 20 wt .-% high yield pulp, and a maximum of 80 wt .-% wood-free material (kraft pulp) containing the continuous fibrous web Especially in the dryer section of the relevant manufacturing machine in a range in which it has a moisture content of at least 10%, by means of at least one high-temperature drying device at a temperature> 110 0 C is dried.
  • a method for producing a fibrous web, in particular graphic paper web from a composition of matter, which consists of at least 20 wt .-% high yield pulp, and a maximum of 80 wt .-% wood-free material (kraft pulp) containing the continuous fibrous web Especially in the dryer section of the relevant manufacturing machine in a range in which it has a moisture content of at least 10%, by means of at least one high-temperature drying device at a temperature> 110 0 C is dried.
  • the high yield pulp preferably comprises pulp selected from the group consisting of BCTMP, CTMP, APMP and any combinations thereof.
  • the high-temperature drying device is used in a range in which the fibrous web has a moisture content of at least 20%, in particular has a moisture content of about 50% and preferably a moisture content of about 55%.
  • Moisture content in the range of about 10 to about 55% and preferably in the range of about 30 to about 55%.
  • the fibrous web is dried by means of the high-temperature drying apparatus at a temperature> 120 ° C and preferably> 130 0 C.
  • the fibrous web is dried by means of the high-temperature drying apparatus at a temperature in the range of about 110 to 200 0 C. At higher temperatures, the fibers may be damaged by yellowing or burning.
  • the high-temperature drying device comprises at least one heated drying cylinder, which is covered over a part of its outer periphery by at least one pressure contact relative to the drying cylinder performing pressure hood, wherein the
  • Fiber web is passed together with at least one sieve and an impermeable fabric with lying on the side of the drying cylinder fibrous web between the drying cylinder and the pressure hood.
  • Such a high-temperature drying device as such is known, for example, from DE 10 2004 017 808 A1 and DE 10 2004 017 809 A1. Incidentally, the high-temperature drying device may in particular be designed as described in these documents.
  • the operating temperature of the drying cylinder is advantageously selected to be> 12O 0 C, preferably> 13O 0 C or in a range of about 110 to about 200 0 C.
  • the softening of natural substances depends on both temperature and humidity. As a result, the greatest benefit can be drawn from the improved strength process in the pre-dryer section of the papermaking machine. According to a preferred embodiment of the method according to the invention, the high-temperature drying device is thus used in the pre-drying section.
  • two in the web running direction preferably directly consecutive high-temperature drying devices are used, preferably one side of the fibrous web is brought to the drying cylinder of the first and the other side of the fibrous web with the second drying cylinder of the high-temperature drying device in contact.
  • the operating temperature of the heatable cylinder is at least the second high-temperature drying device considered in the web running direction> 12O 0 C, preferably> 13O 0 C or in a range of about 110 to about 200 0 C.
  • the operating temperature of the heatable cylinder is the in
  • Web running direction considers first high-temperature drying device less than that of the cylinder of the second high-temperature drying device.
  • the operating temperature of the first cylinder can therefore be limited.
  • only one high-temperature drying device is used with respect to the roughness and / or absorption capacity of the supplied fibrous web and the fibrous web fed thereto with its rougher or a higher take-up possessing side with the drying cylinder of the high-temperature Drying device brought into contact.
  • an asymmetric press concept such as, for example, a DuoCentriNipcoFlex press plus conveyor belt can be used to produce a significant two-sidedness in the press and compensation can be provided by the unidirectional high-temperature drying device comprising, for example, a drying cylinder with associated pressure hood.
  • a precalender is used to compensate for a two-sidedness of the fibrous web with respect to roughness and / or absorbency, preferably at the end of the pre-dryer section, in particular as a high-temperature drying apparatus.
  • a drying unit with a drying cylinder with associated pressure hood instead of a drying unit with a drying cylinder with associated pressure hood, in particular, such a precalender can also be used.
  • a high-temperature soft-nip calender is provided as precalender.
  • NipcoFlex shoe calender can advantageously also be used in particular as a precalender.
  • the pre-calender can be used in front of or behind a pre-coating machine or pre-sizing press.
  • the Vorkaiandrier mixes includes a steam preheating. This ensures, inter alia, that the fibers are softened on the initially rougher side of the fibrous web, whereby a better smoothing is possible.
  • a two-sidedness of the fibrous web in the coating section over the coating weight is compensated with respect to the roughness and / or the absorption capacity.
  • means may therefore be provided for compensating a two-sidedness of the fibrous web with respect to the roughness and / or the take-up capacity by means of a corresponding control and / or regulation of the line weight in the coating section.
  • the coating can be carried out, for example, by one to six coating units with either a single-sided application or a simultaneous two-sided application. In the coating process, one or more layers may be applied simultaneously to achieve the desired paper properties.
  • the fibrous web in the coating section is produced by a direct and / or indirect coating method and / or by a doctor blade coating method and / or by a film coating method and / or by a spraying method and / or by a curtain coating method and / or by a multi-layer coating method.
  • Curtain coating process coated is produced by a direct and / or indirect coating method and / or by a doctor blade coating method and / or by a film coating method and / or by a spraying method and / or by a curtain coating method and / or by a multi-layer coating method.
  • Curtain coating process coated coated.
  • a two-sidedness of the fibrous web with respect to the roughness and / or the take-up capacity is compensated in a particularly concluding calendering process by a correspondingly designed calender.
  • a calender can be used which, taken individually, brings with it a significant two-sidedness.
  • the object mentioned at the outset is also achieved by a device for producing a fibrous web, in particular a graphic paper web, with means for producing a composition of matter comprising at least 20% by weight high yield pulp comprising pulp selected from the group consisting of BCTMP , CTMP, APMP and any combination thereof, and containing at most 80 wt .-% wood-free material (kraft pulp), and at least one provided in particular in a dryer section high-temperature drying device for drying the moving fibrous web at a temperature> 110 ° C in one area in which the incoming fibrous web has a moisture content of at least 10%.
  • Figure 1 is a schematic partial representation of an exemplary embodiments with reference to the drawing; in this show:
  • Figure 1 is a schematic partial representation of an exemplary embodiments with reference to the drawing; in this show:
  • Figure 1 is a schematic partial representation of an exemplary embodiments with reference to the drawing; in this show:
  • Figure 1 is a schematic partial representation of an exemplary embodiments with reference to the drawing; in this show:
  • Figure 1 is a schematic partial representation of an exemplary
  • Embodiment of a device according to the invention for producing a fibrous web Embodiment of a device according to the invention for producing a fibrous web
  • Figure 2 is a schematic representation of an exemplary
  • FIGS 3 and 4 are diagrams showing the influence of the temperature and the
  • FIG. 1 shows, in a schematic partial representation, an exemplary embodiment of a device 10 for producing a fibrous web, which may in particular be a graphic paper web.
  • the fibrous web is produced starting from a composition of matter which consists of at least 20% by weight of high-yield pulp and contains not more than 80% by weight of wood-free substance (kraft pulp).
  • the high yield pulp comprises pulp which is, for example, preferably selected from the group consisting of BCTMP, CTMP, APMP and any combinations thereof.
  • the apparatus 10 comprises two high-temperature drying devices 12, 14 arranged directly behind one another in the web running direction L for drying the moving fibrous web.
  • the fibrous web is passed through at least one of these high-temperature drying devices 12, 14, preferably at least through the second high-temperature drying device 14 at a temperature> 11O 0 C in a region in which the incoming fibrous web has a moisture content of at least 10%, dried.
  • the two are High-temperature drying devices arranged at the end of a pre-drying section 16.
  • a respective high-temperature drying device 12, 14 comprises a steam-heated one
  • a central steam inlet 22 is provided.
  • the web inlet 24 is provided in the region of a left lower guide roller 26 and the web outlet in the region of a lower right guide roller 30.
  • the fibrous web is passed together with at least one sieve and an impermeable clothing with lying on the side of the drying cylinder 18 Faserstoffbah ⁇ between the drying cylinder 18 and the pressure hood 20.
  • the operating temperature of at least the second drying cylinder 14 is> 12O 0 C, preferably> 130 0 C or in a range of about 110 to about 200 0 C chosen.
  • the two high-temperature drying devices 12, 14 are arranged so that one side of the fibrous web with the drying cylinder 18 of the first and the other side of the fibrous web with the drying cylinder 18 of the second high-temperature drying device 12 and 14 comes into contact.
  • FIGS. 3 and 4 show how the temperature and the humidity influence the softening of cellulose, hemicellulose and lignin.

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  • Paper (AREA)

Abstract

L'invention concerne un procédé utilisé pour produire une bande de matière fibreuse, notamment une bande de papier graphique, à base d'une composition de substances, contenant au moins 20% en poids de matière fibreuse, sélectionnée dans le groupe comprenant BCTMP, CTMP, APMP, et de quelconques combinaisons desdits constituants, ainsi qu'au maximum 80% en poids de matière sans bois (pâte kraft). La bande de matière fibreuse continue est séchée, notamment dans la partie sèche de la machine de production concernée, dans une zone où elle présente une teneur en humidité d'au moins 10%, au moyen d'un dispositif de séchage haute température, à une température supérieure à 110°C.
EP08760337A 2007-06-08 2008-06-02 Procédé et dispositif pour produire une bande de matière fibreuse Ceased EP2155961A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007026681A DE102007026681A1 (de) 2007-06-08 2007-06-08 Verfahren und Vorrichtung zur Herstellung einer Faserstoffbahn
PCT/EP2008/056750 WO2008148726A2 (fr) 2007-06-08 2008-06-02 Procédé et dispositif pour produire une bande de matière fibreuse

Publications (1)

Publication Number Publication Date
EP2155961A2 true EP2155961A2 (fr) 2010-02-24

Family

ID=39942175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08760337A Ceased EP2155961A2 (fr) 2007-06-08 2008-06-02 Procédé et dispositif pour produire une bande de matière fibreuse

Country Status (5)

Country Link
US (1) US20100096095A1 (fr)
EP (1) EP2155961A2 (fr)
CN (1) CN101688365A (fr)
DE (1) DE102007026681A1 (fr)
WO (1) WO2008148726A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013091105A1 (fr) * 2011-12-20 2013-06-27 The Royal Institution For The Advancement Of Learning/Mcgill University Procédé et appareil pour la fabrication de matériaux lignocellulosiques avec des propriétés améliorées
CN113413703A (zh) * 2021-07-20 2021-09-21 中建三局第一建设安装有限公司 一种方便清理的暖通空调过滤装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6322667B1 (en) * 1994-07-04 2001-11-27 Mcgill University Paper and paperboard of improved mechanical properties
JP2003041495A (ja) * 2001-07-27 2003-02-13 Tokushu Paper Mfg Co Ltd シート状物質及び其の乾燥方法並びに装置
DE102004017809A1 (de) 2004-04-13 2005-10-27 Voith Paper Patent Gmbh Trockenanordnung
DE102004017808A1 (de) 2004-04-13 2005-10-27 Voith Paper Patent Gmbh Maschine und Verfahren zur Herstellung einer Faserstoffbahn

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008148726A2 *

Also Published As

Publication number Publication date
WO2008148726A3 (fr) 2009-03-05
CN101688365A (zh) 2010-03-31
DE102007026681A1 (de) 2008-12-11
US20100096095A1 (en) 2010-04-22
WO2008148726A2 (fr) 2008-12-11

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