EP2860312B1 - Anordnung einer faserbahnherstellungslinie and verfahren einer faserbahnherstellungslinie - Google Patents

Anordnung einer faserbahnherstellungslinie and verfahren einer faserbahnherstellungslinie Download PDF

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Publication number
EP2860312B1
EP2860312B1 EP13187694.8A EP13187694A EP2860312B1 EP 2860312 B1 EP2860312 B1 EP 2860312B1 EP 13187694 A EP13187694 A EP 13187694A EP 2860312 B1 EP2860312 B1 EP 2860312B1
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EP
European Patent Office
Prior art keywords
nozzles
fiber web
nozzle row
treatment substance
substance
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
EP13187694.8A
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English (en)
French (fr)
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EP2860312A1 (de
Inventor
Tapio Pitkäniemi
Topi Tynkkynen
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
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
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Priority to EP13187694.8A priority Critical patent/EP2860312B1/de
Priority to CN201420546976.4U priority patent/CN204238070U/zh
Publication of EP2860312A1 publication Critical patent/EP2860312A1/de
Application granted granted Critical
Publication of EP2860312B1 publication Critical patent/EP2860312B1/de
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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0207—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the work being an elongated body, e.g. wire or pipe

Definitions

  • the invention relates to an arrangement of a fiber web production line and to a method in a fiber web production line. Especially the invention relates to an arrangement and to a method of a coating or sizing section of a fiber web production line, in which section the coating or sizing medium is applied on the fiber web by spray means. More especially the invention relates to an arrangement according to the preamble part of claim 1 and to a method according to the preamble part of claim 6.
  • a typical production and treatment line comprises a head box, a wire section and a press section as well as a subsequent drying section and a reel-up.
  • the production and treatment line can further comprise other devices and sections for finishing the fiber web, for example, a sizer, a calender, a coating section.
  • the production and treatment line typically also comprises a reel-up and at least one winder for winding customer rolls as well as at least one roll packaging apparatus.
  • sizing is used to alter the properties of a fiber web by adding sizing agents (sizing medium), for example glue chemicals.
  • Sizing can be divided to internal sizing and surface sizing.
  • internal sizing the sizing agent is added to pulp in the wet end of the fiber web machine before forming.
  • surface sizing the sizing agent is added onto the surface of the fiber web at the dry end of the fiber web machine.
  • a coating in production of fiber webs, for example of paper or board webs, in coating, especially the surface of a fiber web is formed with a layer of coating color (coating medium) at a coating station followed by drying.
  • the formation of a coating in direct coating applications can be divided in supplying the coating color onto the web surface, which is called the application of the coating color, as well as in the adjustment of final amount of coating color.
  • the adjustment of the color amount is controlled already when supplying the color and therefore an additional adjustment is not needed.
  • the coating or the sizing of a fiber web typically utilizes a coating device - a coater - or a sizing device - a sizer, which together with for example drying devices following the coater/sizer form the coating / sizing section of a fiber web production line.
  • a coating device - a coater - or a sizing device - a sizer which together with for example drying devices following the coater/sizer form the coating / sizing section of a fiber web production line.
  • different kinds of application technology for application of the coating or the sizing medium on the fiber web are employed in prior art arrangements, for example curtain technology or blade application technology or rod application technology or air brush application technology or spray application technology.
  • the present invention relates to spray application technology.
  • WO publication 2006/058961 A1 is disclosed a method and arrangement for processing a paper or board web or similar fiber web.
  • a processing mixture is applied on the surface of the web with spray nozzles.
  • WO publication 02/072953 is disclosed an assembly for treating a moving web of paper of board with web treatment substance which assembly comprises an application chamber located in at close vicinity of the moving web and facing the web and at least one linear nozzle array incorporating at least one nozzle for spraying the web treatment substance on the web.
  • Fl utility model registration 9401 is disclosed a device for treating a fiber web, which comprises an application device, in particular a spraying device, for applying treatment substance on a moving fiber web.
  • US 2003/120303 discloses a distribution pipe structure from steel industry, in which the pipes are located within each other and the innermost pipe is for glue and in the two outer pipes there is water for controlling the temperature of the glue and for cleaning the nozzles.
  • US 2118212 discloses a process and apparatus for coating paper in which several rows of nozzles are used.
  • the coating and sizing units can be located in different positions in the fiber web production line, for example at a wire section, or at a press section, or at a drying section comprising drying cylinders. However, the typical location is after the pre-dryer section, when the web moisture is typically between 2-12 %.
  • the nozzles or nozzle units of a spray coating or sizing unit are as known from prior art attached to a distributor pipe that extends in cross direction over the width of the fiber web and that delivers the treatment substance to the nozzles.
  • FIG 1 is shown side projection one schematical example of prior art arrangement of spraying device for applying treatment substance on a moving fiber web W.
  • the spraying device according to prior art comprises a distributor pipe 10 extending in cross direction over the width of the fiber web W.
  • the distributor pipe 10 comprises several at a distance in the cross direction spaced apart from each other located nozzles 20 in one row, which nozzles 20 creating one nozzle row 21 are typically supported by a support element 15 extending in the cross direction.
  • the treatment substance is supplied via channels 11 from the distributor pipe 10.
  • Typical flow amount window for a nozzle in pressure range 3-12 bar is set point ⁇ 30 %.
  • Typical sizing amount as dry for woodfree copy and special papers is 0.5-1.5 g/m 2 and for different board grades 1-3 g/m 2 .
  • the prior art arrangement is also problematic in cases in which different substance components are used simultaneously to form the treatment substance since the substances, for example hydrophobic chemicals and color agents may react with each other or with impurities of return-flow and thus plugging may occur for example in the nozzles.
  • An object of the invention is to create an arrangement in a fiber web production line and a method in a fiber web production line in which the disadvantages of known arrangements and methods relating to changes in application amounts of the treatment substance are eliminated or at least minimized.
  • An object of the invention is to provide an arrangement of a fiber web production line and a method of a fiber web production line in which problems with treatment substance component reacting with each other creating plugging problems are eliminated or at least minimized.
  • Further objects of the invention is to provide an arrangement of a fiber web production line and a method of a fiber web production line in which new possibilities of amount adjusting of the treatment substance and of substance component selection are available.
  • the arrangement of a coating or sizing section of a fiber web production line in which section a treatment substance, in particular a coating or sizing medium, is applied onto the fiber web by spraying, which arrangement comprises nozzles located in one nozzle row extending in cross-direction i.e. in width direction of the fiber web for spraying the treatment substance onto the fiber web and at least two distributor pipes connected to the nozzles for supplying treatment substance to the nozzles in the one nozzle row and the at least two distributor pipes are each connected to alternate nozzles of the one nozzle row.
  • the nozzles in the one nozzle row do not necessarily need to be on straight line and center lines of the nozzles, in particular for different distribution pipes, can be offset +/- 20 mm in the nozzle row, advantageously +/- 10 mm.
  • the offset depends on distribution of the nozzles and on desired coverage of the treatment substance on the fiber web.
  • the arrangement comprises two distributor pipes each connected to alternate nozzles of the one nozzle row.
  • the arrangement comprises control means to selectively supply treatment substance from the distributor pipes, for example from only one distributor pipe.
  • the control means are for example arranged as valves before inlet of each distributor pipe.
  • the treatment substance is supplied by one machine circulation via one inlet channel and just before the inlets to the distributor pipes the inlet channel is divided to channels with valves leading to each of the inlets to the distributor pipes.
  • Each distributor pipe may also have a machine circulation of its own, for example in cases where the treatment substances are not to be mixed at this stage, and thus each distribution pipe has own inlet channel, pump and optional valve. In this arrangement the inlet is controlled by the pump or by the optional valve.
  • the dimensions of the distributor pipes can be same or different.
  • Wet treatment substance amounts applied by nozzles of the distributor pipers vary from 5 g/m 2 to 50 g/m 2 and the speed of the fiber web depending on the production line varies from 300 m/min to 2000 m/min and the width of the fiber web from 3 m to 10 m, thus the total inlet amount of treatment substance amount to each distribution pipe varies from 10 kg/min to 1100 kg/min.
  • Desired flow rate at inlet to distribution pipe varies form 2 m/s to 10 m/s and thus needed inside diameter of one distributor pipe, if only one distributor pipe is used, is from 10 mm to 80 mm and thus according to an advantageous feature the inside diameter of each distributor pipe is from 8 mm to 56 mm taking in account that the diameters of the distributor pipes can be different from each other in the arrangement according to the invention.
  • the feed into each distributor pipe can be from the same or different ends of the distributor pipes.
  • the outlet from each distributor pipe can be from the same or different ends of the distributor pipes. In cases where the feed to the distributor pipes is at different ends and the outlet correspondingly at different ends of the distributor pipes an inclined profile of the spayed substance amount of one distributor pipe caused by pressure loss between the ends of the distributor pipe can easily be corrected.
  • outlet flow from one distributor pipe can be led to another distributor pipe and the fresh treatment substance flow to the one distributor pipe.
  • the method of a coating or sizing section of a fiber web production line in which method a treatment substance, in particular a coating or sizing medium, is applied onto the fiber web by spraying by nozzles located in one nozzle row extending in cross-direction i.e. in width direction of the fiber web for spraying the treatment substance onto the fiber web, characterized in that in the method the treatment substance is supplied to the nozzles by at least two distributor pipes and in the method the treatment substance is supplied by the at least two distributor pipes, which are each connected to alternate nozzles of the one nozzle row, alternatingly to the nozzles of the one nozzle row.
  • the treatment substance is supplied by two distributor pipes alternatingly to the nozzles of the one nozzle row.
  • different treatment substances or components of the treatment substance can be supplied via different distributor pipes.
  • substances that when reacting with each other before nozzles would cause plugging can be used by supplying one component by one distributor pipe and one component by another distributor pipe.
  • the different substances or components of the substance can be for example a combination: color substance -hydrophobic substance, one color substance - another color substance, substances with different viscosity and solids content, water - chemical substance etc.
  • the amount of treatment substance can be controlled without any need for changing the nozzles. Also in case the undesired plugging occurs in one distributor pipe the other one can be used.
  • FIG 1 is shown side projection one schematical example of prior art arrangement of spraying device for applying treatment substance on a moving fiber web W.
  • the spraying device according to prior art comprises a distributor pipe 10 extending in cross direction over the width of the fiber web W.
  • the distributor pipe 10 comprises several at a distance in the cross direction spaced apart from each other located nozzles 20 in one row, which nozzles 20 creating one nozzle row 21 are typically supported by a support element 15 extending in the cross direction.
  • the treatment substance is supplied from the distributor pipe 10 via channels 11.
  • FIG. 2 - 3 is shown side projection one advantageous example of an arrangement of a spraying device for applying treatment substance on a moving fiber web W according to the invention.
  • the spraying device comprises two distributor pipes 10A, 10B extending in cross direction over the width of the fiber web W.
  • the spraying device further comprises several at a distance in the cross direction spaced apart from each other located nozzles 20A, 20B in one nozzle row 21, which nozzles 20A, 20B creating the one nozzle row 21 are supported by a support element 15 extending in the cross direction.
  • the two distributor pipes 10A, 10B are alternatingly connected to the nozzles 20A, 20B for supplying treatment substance to the nozzles 20A, 20B in the one nozzle row.
  • Each distributor pipe 10A, 10B are connected to alternate nozzles 20A, 20B of the one nozzle row 21.
  • the treatment substance is led to nozzles 20A via channels 11A.
  • Each nozzle 20A having its own channel 11A.
  • the treatment substance is led to nozzles 20B via channels 11AB.
  • Each nozzle 20aB having its own channel 11B.
  • each distributor pipe 10A, 10B is in this example arranged from the same end of the distributor pipes 10A, 10B.
  • the outlet 13A, 13B as indicated by arrows, from each distributor pipe 10A, 10B from the same of the distributor pipes 10A, 10B
  • the feed 12A, 12B and correspondingly the outlet 13A, 13B of the distributor pipes 10A, 10B can also be at different ends of the distributor pipes 10A, 10B as shown by dashed arrows.
  • From distributor pipes 10A, 10B via channels 11A, 11B correspondingly the treatment substance is supplied correspondingly to the alternate nozzles 20A, 20B to be sprayed onto the passing fiber web.
  • FIGS 5A - 5B is very schematically, not in scale, shown examples of one nozzle row 21.
  • the nozzle row comprises nozzles 20A, 20B located in the one nozzle row.
  • the nozzles can be located offset O +/- 20 mm, advantageously +/- 10 mm.
  • the offset O depends on distribution of the nozzles 20A, 20B i.e. the cross-directional distance between the nozzles and on desired coverage of the treatment substance on the fiber web.
  • the coverage of the treatment substance spray of one nozzle is typically 300 mm on the fiber web and when the distance between two nozzles next to each other is advantageously 50 mm (i.e.
  • the center lines of adjacent nozzles 20A, 20B can be located from 0 to 10 mm from the center line of adjacent nozzle 20B, 20A.
  • the nozzles 20A, 20B in particular for different distribution pipes 10A, 10B, can thus be offset O +/- 10 mm in the nozzle row 21, when the distribution is 50 mm, and offset O +/- 20 mm, when the distribution is 100 mm, as shown in figures 5A and 5C .
  • center lines of all nozzles 20A, 20B are in the one nozzle row 21 on same straight line.

Claims (10)

  1. Anordnung in einer Beschichtungs- oder Leimungspartie einer Faserbahnherstellungslinie, wobei in der Partie eine Behandlungssubstanz, insbesondere ein Beschichtungs- oder Leimungsmittel, mittels Sprühen auf die Faserbahn aufgebracht wird, wobei die Anordnung Düsen (20A, 20B) aufweist, die in einer Düsenreihe (21) angeordnet sind, die sich in Querrichtung, d. h. in der Breitenrichtung der Faserbahn erstreckt, um die Behandlungssubstanz auf die Faserbahn zu sprühen,
    dadurch gekennzeichnet, dass
    die Anordnung wenigstens zwei Verteilleitungen (10A, 10B) aufweist, die mit den Düsen (20A, 20B) verbunden sind, um die Behandlungssubstanz zu den Düsen (20A, 20B) in der einen Düsenreihe (21) zuzuführen, und dass in der Anordnung die wenigstens zwei Verteilleitungen (10A, 10B) jeweils mit abwechselnden Düsen (20A, 20B) der einen Düsenreihe (21) verbunden sind.
  2. Anordnung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die Mittellinien der Düsen (20A, 20B), insbesondere für unterschiedliche Verteilleitungen (10A, 10B), um +/- 20 mm, vorzugsweise +/- 10 mm, in der einen Düsenreihe (21) versetzt (O) sind.
  3. Anordnung nach einem der Ansprüche 1 oder 2,
    dadurch gekennzeichnet, dass
    die Anordnung zwei Verteilleitungen (10A, 10B) aufweist, die jeweils mit abwechselnden Düsen (20A, 20B) der einen Düsenreihe (21) verbunden sind.
  4. Anordnung nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, dass
    die Anordnung eine Steuereinrichtung zum selektiven Zuführen von Behandlungssubstanz von den Verteilleitungen (10A, 10B) aufweist.
  5. Anordnung nach einem der Ansprüche 1 bis 4,
    dadurch gekennzeichnet, dass
    der Innendurchmesser von jeder Verteilleitung (10A, 10B) von 8 mm bis 56 mm beträgt.
  6. Verfahren für eine Beschichtungs- oder Leimungspartie einer Faserbahnherstellungslinie, wobei in dem Verfahren eine Behandlungssubstanz, insbesondere ein Beschichtungs- oder Leimungsmittel, mittels Sprühen durch Düsen (20A, 20B), die in einer Düsenreihe (21) angeordnet sind, die sich in einer Querrichtung, d. h. in der Breitenrichtung der Faserbahn erstreckt, aufgebracht wird, um die Behandlungssubstanz auf die Faserbahn zu sprühen,
    dadurch gekennzeichnet, dass
    in dem Verfahren die Behandlungssubstanz zu den Düsen (20A, 20B) in der einen Düsenreihe mittels wenigstens zweier Verteilleitungen (10A, 10B) zugeführt wird, und dass in dem Verfahren die Behandlungssubstanz mittels der wenigstens zwei Verteilleitungen (10A, 10B) zugeführt wird, die jeweils mit abwechselnden Düsen (20A, 20B) der einen Düsenreihe (21) verbunden sind, die sich mit den Düsen (20A, 20B) der einen Düsenreihe (21) abwechseln.
  7. Verfahren nach Anspruch 6,
    dadurch gekennzeichnet, dass
    in dem Verfahren die Behandlungssubstanz mittels zweier Verteilleitungen (10A, 10B) abwechselnd zu den Düsen (20A, 20B) der einen Düsenreihe (21) zugeführt wird.
  8. Verfahren nach Anspruch 6,
    dadurch gekennzeichnet, dass
    in dem Verfahren unterschiedliche Behandlungssubstanzen oder Bestandteile der Behandlungssubstanz mittels unterschiedlicher Verteilleitungen (10A, 10B) zugeführt werden.
  9. Verfahren nach Anspruch 8,
    dadurch gekennzeichnet, dass
    in dem Verfahren unterschiedliche Substanzen oder Bestandteile der Substanzen aus den folgenden Kombinationen ausgewählt werden: Farbsubstanz - hydrophobe Substanz, eine Farbsubstanz - eine andere Farbsubstanz, Substanzen mit unterschiedlicher Viskosität und Feststoffgehalt.
  10. Verfahren nach Anspruch 6,
    dadurch gekennzeichnet, dass
    in dem Verfahren eine unterschiedliche Menge der Behandlungssubstanz durch unterschiedliche Verteilleitungen (10A, 10B) zugeführt wird.
EP13187694.8A 2013-10-08 2013-10-08 Anordnung einer faserbahnherstellungslinie and verfahren einer faserbahnherstellungslinie Active EP2860312B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13187694.8A EP2860312B1 (de) 2013-10-08 2013-10-08 Anordnung einer faserbahnherstellungslinie and verfahren einer faserbahnherstellungslinie
CN201420546976.4U CN204238070U (zh) 2013-10-08 2014-09-23 纤维幅材生产线的布置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13187694.8A EP2860312B1 (de) 2013-10-08 2013-10-08 Anordnung einer faserbahnherstellungslinie and verfahren einer faserbahnherstellungslinie

Publications (2)

Publication Number Publication Date
EP2860312A1 EP2860312A1 (de) 2015-04-15
EP2860312B1 true EP2860312B1 (de) 2019-05-22

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EP13187694.8A Active EP2860312B1 (de) 2013-10-08 2013-10-08 Anordnung einer faserbahnherstellungslinie and verfahren einer faserbahnherstellungslinie

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CN (1) CN204238070U (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11396727B2 (en) 2017-12-28 2022-07-26 Corelex Shin-Ei Co., Ltd. Deodorant-paper manufacturing method
EP3910103A1 (de) * 2020-05-15 2021-11-17 Valmet Technologies Oy Verfahren und vorrichtung zum aufbringen einer substanzschicht auf eine bewegte faserbahn durch schaumauftrag

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Publication number Priority date Publication date Assignee Title
US2118212A (en) * 1933-04-24 1938-05-24 James D Maclaurin Process and apparatus for coating paper
FI108061B (fi) * 1995-10-05 2001-11-15 Metso Paper Inc Menetelmä liikkuvan paperi- tai kartonkirainan päällystämiseksi
US6755913B1 (en) * 1999-02-15 2004-06-29 Nordson Corporation Multi-color change device with conductive coating material for electrostatic coating
FI115314B (fi) 2001-03-13 2005-04-15 Metso Paper Inc Sovitelma paperin tai kartongin käsittelemiseksi
US20030129303A1 (en) * 2002-01-08 2003-07-10 Borwig Michael C. Apparatus and method for applying glue
FI115408B (fi) * 2002-01-31 2005-04-29 Ciba Sc Holding Ag Menetelmä paperi- tai kartonkirainan päällystämiseksi, menetelmän käyttö ja päällystyspasta
US7217342B2 (en) * 2002-11-25 2007-05-15 Kangas Martti Y O Apparatus for paper making and paper surface enhancement
US7837131B2 (en) * 2003-03-27 2010-11-23 Spraying Systems Co. Modular automatic spray gun manifold
FI121084B (fi) 2004-12-01 2010-06-30 Metso Paper Inc Menetelmä ja sovitelma kuituradan käsittelemiseksi
JP5787700B2 (ja) * 2011-09-30 2015-09-30 ユニ・チャーム株式会社 不織布の製造方法

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