EP2379803A1 - Caisse de tête d'arrivée de pâte pour une machine de production d'une bande continue de matière fibreuse - Google Patents

Caisse de tête d'arrivée de pâte pour une machine de production d'une bande continue de matière fibreuse

Info

Publication number
EP2379803A1
EP2379803A1 EP09760785A EP09760785A EP2379803A1 EP 2379803 A1 EP2379803 A1 EP 2379803A1 EP 09760785 A EP09760785 A EP 09760785A EP 09760785 A EP09760785 A EP 09760785A EP 2379803 A1 EP2379803 A1 EP 2379803A1
Authority
EP
European Patent Office
Prior art keywords
headbox
fluid
controllable
metering
pulp suspension
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.)
Granted
Application number
EP09760785A
Other languages
German (de)
English (en)
Other versions
EP2379803B1 (fr
Inventor
Marco Thomisch
Wolfgang Ruf
Volker Schmidt-Rohr
Markus Häußler
Hans Loser
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 EP2379803A1 publication Critical patent/EP2379803A1/fr
Application granted granted Critical
Publication of EP2379803B1 publication Critical patent/EP2379803B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • D21F1/022—Means for injecting material into flow within the headbox

Definitions

  • Headbox for a machine for producing a fibrous web
  • the invention relates to a headbox for a machine for producing a fibrous web, in particular paper or board web, from at least one pulp suspension, comprising a feeding device feeding the at least one pulp suspension, having a downstream and a plurality of channels arranged in rows and in columns A distribution well plate having a downstream thereto, over the width of the headbox extending intermediate channel with a plurality of spaced in the width direction of the headbox means for preferably controllable / metered addition of a fluid in fluid streams in the at least one pulp suspension, wherein the single means each have a plurality comprising each Zudosierkanalötechnisch having, opening at different heights and connected to a common supply channel Zudosierkanäle for the fluid, with a downstream T arranged turbulence generating means having a plurality of flow channels arranged in rows and in columns, and having a headbox jet immediately adjacent to the turbulence generation means and having a nozzle gap.
  • Such a headbox is referred to in professional circles as “dilution water headbox” and is known for example from the German patents DE 44 16 898 A1, DE 44 16 899 A1 and DE 44 16 909 A1.
  • German patent application DE 44 16 898 A1 shows a headbox for a paper machine with a feed device for the pulp suspension, with a guide means having a multiplicity of channels, a mixing chamber located upstream of a guide means with a plurality of feed means distributed across the headbox for a material to be mixed different in its properties from the stock suspension, and an exit gap for the stock suspension following the guide means forming nozzle chamber.
  • the feed devices for the fluid to be admixed extend essentially vertically in the mixing chamber and have a plurality of admixed openings arranged one above the other.
  • German patent application DE 44 16 899 A1 shows a headbox for a paper machine with a feed device for the pulp suspension, a first having a plurality of channels guide means, a second plurality of channels having guide means, an intermediate mixing chamber, a subsequent, a Exit slit for the pulp forming nozzle chamber and a plurality of distributed over the headbox feed lines for the admixed fluid, wherein the majority of the channels of the guide means are positioned and dimensioned so that the outlet opening from the upstream guide means is not aligned with an opening in the downstream guide means ,
  • the supply lines for the admixing fluid have admixing openings, which for the most part are each aligned with an opening in the downstream guide device.
  • German patent application DE 44 16 909 A1 discloses a headbox for a paper machine with a feed device for the pulp suspension, a downstream adjoining provided with a plurality of channels guide means, a downstream thereto, extending across the width of the headbox mixing chamber with a plurality of transverse distributed over the headbox, extending in the flow direction partitions and distributed across the headbox Zudiesseinrich- tions for a zuzumischendes fluid with Zumischö réelleen, downstream of another, a plurality of channels having guide means and a subsequent, an outlet gap for the stock suspension forming nozzle chamber.
  • the supply means for the admixed fluid extend into the mixing chamber and the sectional area formed by the partitions in the mixing chamber begins in the region of the admixing openings, from where it extends substantially in the direction of flow up to the second guide means.
  • the headbox should enable an efficient and cost-effective addition of the at least one further fluid into the at least one fibrous suspension which can be fluidized.
  • the trilemma is to be solved, on the one hand in certain areas of the headbox, such as in the turbulence generator, for the purpose of intensive mixing of the components of the at least one provided with at least one fluid suspension turbulent flows are at least to some extent desirable, however on the other hand in certain other area of the headbox, such as in the headbox, no further mixing and thus no further turbulence of the components of the at least one provided with at least one fluid suspension is more desirable and that on the third side the effect of certain high molecular weight or long chain ingredients of the pulp suspension, in particular due to turbulence and shear fields caused thereby, should not be reduced.
  • the means for preferably controllable / metered addition of the fluid in the fluid streams in the at least one pulp suspension also preferably regulated / controllable metered addition of at least one further fluid in partial fluid streams the at least one fibrous suspension is formed, wherein the individual means each comprise a plurality of Zudosierkanalö réelle having a respective Zudosierkanalö réelle, at different heights and connected to a common supply channel Zudosierkanäle for the at least one further fluid.
  • the object of the invention is completely solved in this way.
  • the inventive design of the headbox of the type mentioned initially eliminates the aforementioned disadvantages of the prior art as far as possible, preferably completely.
  • the addition of the at least one further fluid in the at least one fluidizable pulp suspension takes place in the area of the headbox due to the stated design of the agent extremely efficiently and inexpensively, and the headbox alone is inexpensive and technically easy to carry out.
  • a satisfactory solution of the described trilemma can be achieved by distributing the at least one further fluid as uniformly as possible over "Z", ie in the height direction of the headbox possibly have properties that are characteristic of a multi-layer headbox.
  • At least one, well-known to those skilled separator, in particular a blade be arranged. If a plurality of separating elements, in particular lamellae, are arranged in the headbox of the headbox according to the invention, then they can have different lengths and possibly also different properties, such as surface contours and the like.
  • the metered addition of the at least one further fluid in the at least one fluidizable pulp suspension can, in a manner obvious to those skilled in the art, in the width direction of the headbox, ie in the "Y” direction ", and / or in the height direction of the headbox, ie in "Z” direction, at least partially regulated / controlled.
  • the Zudosierkanäle associated with the common supply channel of the means for preferably controllable metered addition of the fluid in partial fluid streams in the at least one pulp suspension via Zudosierkanalö Stamm in downstream of the means for preferably controllable / controllable metering and that connected to the common supply channel Zudosierkanäle the means for preferably controllable / metered addition of the at least one further fluid in partial fluid streams in the at least one pulp suspension via Zudosierkanalö Stammen in at least unilateral, preferably in the two-sided lateral region of the means for preferably controllable metered addition open.
  • a spatially separated, spatially independent and uniform metered addition of the fluids with the aim of producing a fibrous web with high-quality properties shafts done.
  • only one column of flow channels of the turbulence generating means or even two columns of flow channels of the turbulence generating means can be supplied with the at least one further fluid.
  • the metering passages which are connected to the common supply channel, open for the preferably controllable addition of the at least one further fluid in partial fluid streams into the at least one fibrous suspension, preferably via metering duct openings in the at least one side, preferably in the two-sided, lateral region of the device - / controllable metering at an angle of 0 to 180 °, preferably from 45 to 135 °, in particular of about 90 °, to the flow direction of the at least one pulp suspension.
  • different strong pulses can be introduced into the mixing areas and thus the quality of the mixtures are influenced.
  • the metering channel of the means connected to the common supply channel has the preferably controllable metered addition of the at least one further fluid Partial streams of fluid into the at least one pulp suspension.
  • the common supply channel of the means for preferably controllable metered addition of the at least one further fluid in partial fluid streams into the at least one fibrous suspension also preferably has a circular cross-sectional area with a diameter of 6 to 20 mm, preferably 10 to 15 mm , These areas continuously ensure the possibility of sufficiently large volume flows for the purpose of producing a fibrous web with high-quality properties.
  • the respective cross-sectional area may be constant, conical or stepped at least in regions, and the respective depth of the supply channel depends essentially on the number of rows of the flow channels of the turbulence generating means.
  • the metering channels of the agent for preferably controllable metered addition to the at least one further fluid in partial fluid streams connected to the common supply channel and in the two-sided lateral area of the means for preferably controllable metering via metering channel openings can be used Pulp suspension be arranged alternately. Also, the metering channels of the agent, which open at different heights, can be arranged at equal intervals for the preferably controllable metered addition for the at least one further fluid.
  • the number of Zudosierkanäle the means for preferably controllable / metered addition of the at least one further fluid is equal to the number of rows of flow channels of the downstream turbulence generating means.
  • This line-wise "1: 1" metering essentially yields process-technological advantages the number of Zudosierkanäle the entire means for preferably controllable / metered addition of the at least one further fluid equal to the number of flow channels of the downstream turbulence generating means.
  • This "1: 1" dosing essentially yields further process-technological advantages.
  • the means for preferably controllable metered addition of the at least two fluids further preferably have a preferably equal pitch in the width direction of the headbox in the range of 10 to 100 mm, preferably 25, 33, 50 or 66 mm.
  • the respective means for preferably controllable metered addition of the fluid in partial fluid streams into the at least one pulp suspension preferably comprises a metering blade, as described in the German patent application (Applicant's file: HPA14265 DE and Applicant's working title: "MJ M-DoS-TE- Geomatometry ”) with the same filing date as the present patent application is described and shown The relevant disclosure content is hereby made the subject of the present description.
  • the preferably designed as a metering means for preferably controllable metered addition of the at least two fluids in partial fluid streams in the at least one pulp suspension has a length in the range of 60 to 350 mm, preferably from 100 to 250 mm, and a height in the range of 50 to 300 mm, preferably 75 to 250 mm.
  • the fluid preferably consists of water, in particular clear water or white water, or of a pulp suspension whose concentration is dependent on the average concentration of the at least one pulp suspension in the headbox is different.
  • the at least one further fluid preferably comprises at least one retention agent, in particular high molecular weight compounds such as polyamines, polyaminoamines, polyacrylamides, polyethyleneimines, cationic starch or guar derivatives, or a dehydration accelerator, in particular polyamines or polyethyleneimines.
  • retention agent in particular high molecular weight compounds such as polyamines, polyaminoamines, polyacrylamides, polyethyleneimines, cationic starch or guar derivatives, or a dehydration accelerator, in particular polyamines or polyethyleneimines.
  • the at least one further fluid may, however, also comprise a chemical of any type, water, in particular clear water or white water, a filler, a fines or another additive customary in the production of fibrous webs.
  • the headbox according to the invention is outstandingly suitable for use in a machine for producing a fibrous web, in particular paper or board web.
  • the fibrous web produced in the machine with at least one headbox according to the invention has consistently excellent properties, since, among other things, it is possible to control both its fiber orientation transverse profile and its basis weight transverse profile.
  • the headbox according to the invention can of course also be designed as a multilayer headbox.
  • all layers of the multilayer headbox can be supplied by one and the same means for the preferably controllable metered addition of at least one further fluid in fluid sub-streams into the at least one pulp suspension.
  • Figure 1 is a vertical and schematic longitudinal sectional view of a headbox for a machine for producing a fibrous web from at least one pulp suspension according to the prior art
  • Figure 2 is a vertical and schematic longitudinal partial sectional view of a first embodiment according to the invention of a headbox for a machine for producing a fibrous web from at least one pulp suspension
  • Figure 3 is a vertical and schematic longitudinal section of a second embodiment according to the invention of a headbox for a machine for producing a fibrous web from at least one pulp suspension
  • FIGS. 4A to 4D show four diagrammatic cross-sectional views of an agent for the preferably controllable metered addition of two
  • FIGS. 5A to 5D show four further schematic cross-sectional views of a
  • FIG. 6 is a schematic side view of the means for preferably controllable metering of two fluids of the headbox shown in FIG. 2 for a machine for producing a fibrous web from at least one pulp suspension.
  • the illustrated headbox 1 shows a vertical and schematic longitudinal section of an exemplary embodiment of a known from the prior art headbox 1 for a machine for producing a fibrous web 3 from a pulp suspension 2.
  • the illustrated headbox 1 can of course also be designed as a multilayer headbox, the at least two different pulp suspensions for the production of the fibrous web 3 used.
  • the fibrous web 3 may in particular be a paper, board or tissue web.
  • the headbox 1 has a feeding device 4 which feeds a pulp suspension 2 (arrow), for example in the embodiment of a transverse distributor tube 5 or a round distributor (not illustrated) with a plurality of tubes.
  • the feeder 4 is followed downstream by a Verteilrohrlochplatte 6, which has a plurality of arranged in rows Z and in columns S channels 7.
  • an over the width B (arrow) of the headbox 1 extending intermediate channel 8 connects, with several in the width direction of the headbox 1 to each other spaced means 9 for preferably controllable / metered metering of a fluid 10 in fluid partial flow 10.T (arrows) is provided in the pulp suspension 2.
  • the individual means 9 for preferably controllable metering comprises in each case a plurality of metering channels 11 having a respective metering channel opening 11.1 and opening at different heights and connected to a common supply channel 12.
  • a turbulence generating means 13 Downstream of the intermediate channel 8 is a turbulence generating means 13 having a plurality of flow channels 14 arranged in rows Z and columns S.
  • the pulp suspension 2 in the turbulence generating means 13 is divided into fibrous suspension partial streams and after exiting the turbulence generating means in a machine-width chamber 15 in a design of a nozzle gap 17 having headbox nozzle 16 merged again to make the formation of a machine-wide Faserstoffbah n 3 to len ermöen.
  • the flow channels 14 are preferably in a known manner as thin-walled Turbulence tubes and / or Turbulenzrohrinserts formed with at least partially constant, at least partially diverging, at least partially converging and / or discontinuous cross-sectional areas.
  • at least one, well known to those skilled and not explicitly shown separating elements, in particular a blade may be arranged. If a plurality of separating elements, in particular lamellae, are arranged in the headbox nozzle 16, they can have different lengths and possibly also different properties, such as surface contours and the like.
  • the headbox 16 may be provided on the outlet side at least one side with a dashed line indicated aperture 18.
  • FIG. 2 shows a vertical and schematic longitudinal partial sectional view of a first embodiment according to the invention of a headbox 1 for a machine for producing a fibrous web from at least one fibrous suspension 2.
  • the basic structure of this headbox 1 substantially corresponds to the basic structure of the headbox 1 shown schematically in FIG that reference is also made to this description of the figures.
  • the feed device 4 is again followed downstream by a distribution-well plate 6, which has a multiplicity of channels 7 arranged in rows Z and in columns S.
  • an intermediate channel 8 extending across the width B (arrow) of the headbox 1 joins with a plurality of means 9 spaced apart in the width direction B (arrow) of the headbox 1 for preferably metered / controllable metered addition of one Fluid 10 (arrow) in partial fluid streams 10.T (arrows) in the pulp suspension 2 (arrow) is provided.
  • the individual means 9 for preferably controllable metering comprises in each case a plurality of a respective metering channel opening 11.1. send, at different heights and connected to a common supply channel 12 Zudosierkanäle 11th
  • turbulence generating means 13 Downstream of the intermediate channel 8 is an already described turbulence generating means 13 with a plurality of arranged in rows Z and in columns S flow channels 14.
  • the flow channels 14 are in a known manner preferably as thin-walled turbulence tubes and / or Turbulenzrohrin- serts with at least partially constant, at least in sections diverging, at least partially converging and / or discontinuous cross-sectional areas formed.
  • the means 9 for preferably controllable metering of the fluid 10 in partial fluid flows 10 .T. (Arrows) into the fibrous suspension 2 is also known
  • the individual means 9 additionally comprises in each case a plurality of metering channels 20, which have a respective metering channel opening 20. 1 and which open at different heights and are connected to a common supply channel 21, for the further fluid 19.
  • the metering channels 20 of the means 9 connected to the common supply channel 21 lead to preferably controllable metering of the further fluid 19 in partial fluid streams 19.T (arrows) into the pulp suspension 2 via metering channel openings 20.1 in the two-sided lateral region 23 of the agent 9 for preferably controllable metered addition.
  • the metering channels 11, 20 of the means 9, which open at different heights, are arranged at equal intervals A for preferably metered / controllable metered addition of the fluid 10 and the further fluid 19.
  • the metering channel openings 11 1, 20. 1 of the metering channels 11, 20 can in turn be aligned with one another, as shown in FIG.
  • FIG. 3 shows a vertical and schematic longitudinal partial sectional view of a second inventive embodiment of a headbox 1 for a machine for producing a fibrous web of at least one pulp suspension 2.
  • the basic structure of this headbox 1 substantially corresponds to the basic structure of the headbox 1 shown schematically in Figure 2, so that reference is also made to this description of the figures.
  • the means 9 for preferably controllable metering of the fluid 10 in partial fluid streams 10T (arrows) into the pulp suspension 2 is also preferably used.
  • the individual means 9 additionally comprises in each case a plurality of metering channels 25 for the further fluid 24, each having a respective metering channel opening 25. 1, opening at different heights and connected to a common supply channel 26.
  • the Zudosierkanäle 25 connected to the common supply channel 26 of the means 9 for preferably controllable metered addition of the third fluid 24 in partial fluid streams 24.T (arrows) in the pulp suspension 2 in turn via Zudosierkanalötechnischen 25.1 in the two-sided lateral region 23 of the means 9 to preferably metered / controllable metering, upstream of the metering channel openings 20.1 of the metering channels 20 for the further fluid 19.
  • the metering channels 11 of the means 9 connected to the common supply channel 12 for preferably controllable metered addition of the fluid 10 into partial fluid streams 10.T (arrows ) in the pulp suspension 2 open via Zudosierkanalö Stammen 11.1 in the downstream region 22 of the means 9 for preferably controllable metered addition.
  • the metering channels 11, 20 of the means 9 for preferably controllable metered addition for the fluid 10 and the two further fluids 19, 24, which open at different heights, are arranged at equal distances A.
  • the Zudosierkanalötechnischen 1 1 .1, 20.1, 25.1 of Zudosierkanäle 11, 20, 25 may in turn, as shown in Figure 3, aligned with each other.
  • FIGS. 4A to 4D show four schematic cross-sectional representations of a means 9 for preferably controllable metered addition of two fluids 10, 19 in partial fluid flows 10.T, 19.T (arrows).
  • the metering channel openings 20. 1 of the metering channels 20 of the three means 9 lead to the preferably controllable metering of the further fluid 19 in partial fluid streams 19.T (arrows) into the pulp suspension 2 in the two-sided lateral region 23 of FIG respective means 9 for preferably controllable metered addition.
  • the Zudosierkanäle 20 open at an angle ⁇ of 90 ° to the flow direction R (arrow) of the pulp suspension 2, in the embodiment of Figure 4C at an angle ⁇ of 45 ° to the flow direction R (arrow) of the pulp suspension 2 and in the embodiment of Figure 4D at an angle ⁇ of 135 ° to the flow direction R (arrow) of the pulp suspension second
  • the metering channel openings 20.1 of the metering channels 20 of the means 9 lead to preferably controllable metering of the further fluid 19 into partial fluid streams 19.T (arrows) into the pulp suspension 2 in the unilateral lateral region 23 of the agent 9 for preferably controllable metered addition, and this at an angle ⁇ of 90 ° to the flow direction R (arrow) of the pulp suspension second
  • T (arrows) in the Faserstoffsuspen- sion 2 have a circular cross-sectional area 20.A with a diameter 20th D from 2 to 10 mm, preferably from 4 to 6 mm.
  • T (arrows) in the pulp suspension 2 has a circular cross-sectional area 21 .A with a diameter 21.D from 6 to 20 mm, preferably from 10 to 15 mm, up.
  • the individual cross-sectional area 20.A, 21.A can extend at least in areas of constant, conical or stepped.
  • the metering channels 20 of the means 9, which are connected to the common supply channel 21 and open in the two-sided lateral region 23 of the means 9 for preferably controllable metering via metering channel openings 20.1, can preferably be metered in and out of the further fluid 19 in partial fluid streams 19.T (arrows) in the pulp suspension 2 also be arranged alternately.
  • FIG. 4A is provided in full with the aforementioned reference numbers.
  • FIGS. 5A to 5D show four further schematic cross-sectional representations of a means 9 for preferably controllable metering of two fluids 10, 19 in partial fluid streams 10.T, 19.T (arrows).
  • the Zudosierkanäle 11 connected to the common supply channel 11 of all means 9 for preferably regulated / controllable metering of the fluid 10 in partial fluid streams 10.T (arrows) in the pulp suspension 2 open via Zudosierkanalötechnischen 11.1 in the downstream region 22 of the means 9 for preferably regularly / controllable dosing.
  • the number of Zudosierkanäle 20 of the means 9 for preferably adjustable / controllable metering for the further fluid 19 is equal to the number of rows Z.
  • the number of Zudosierkanäle 20 all means 9 for preferably controllable / metered addition of the further fluid 19 is equal to the number of flow channels 14 of the downstream turbulence generating means 13th
  • FIG. 6 shows a schematic side view of the means 9 for preferably metered / controllable metering of two fluids 10, 19 (arrows) into fluid sub-streams 10..., 19. T (arrows) of the headbox 1 shown in FIG Machine for producing a fibrous web from at least one pulp suspension.
  • the means 9 for preferably controllable metered addition of the at least two fluids 10, 19 (arrows) in partial fluid streams 10.T, 19.T (arrows) into the at least one pulp suspension 2 comprises a metering blade 9.1.
  • the means 9, preferably designed as a metering blade 9.1, for preferably controllable metering has a length 9.L in the range of 60 to 350 mm, preferably 100 to 250 mm, and a height 9 depending on the height of the intermediate chamber of the headbox 1. H in the range of 50 to 300 mm, preferably from 75 to 250 mm.
  • the means 9, 9.1 for preferably controllable metered addition have a preferably equal pitch T (arrow) in the width direction B (arrow) of the headbox 1 in the range of 10 to 100 mm, preferably 25, 33, 50 or 66 mm (See also Figures 2 and 3).
  • the metering blade 9.1 is described in the German patent application (applicant file reference: HPA14265 DE and applicant working title: "MJ M-DoS-TE geometry") with the same filing date as the present patent application and shown. The relevant disclosure content is hereby made the subject of the present description.
  • the fluid 10 flowing through the particular inventive headbox 1 of FIGS. 2 to 6 consists at least of water, in particular clear water or white water, or of at least one pulp suspension whose concentration is based on the average concentration of the at least one pulp suspension 2 flowing in the headbox 1 different.
  • the at least one further fluid 19, 24 flowing through the headbox 1 according to the invention comprises at least one retention agent, in particular high molecular weight compounds such as polyamines, polyamidoamines, polyacrylamides, polyethyleneimines, cationic starch or guar derivatives, or a dehydration accelerator, in particular polyamines or polyethyleneimines.
  • the headbox 1 shown and described in each case in the figures is particularly suitable for use in a machine for producing a fibrous web 3, in particular paper or board web, from at least one fibrous stock suspension 2.
  • a headbox of the type mentioned above is improved by the invention so that the mentioned disadvantages of the prior art as far as possible, preferably completely eliminated.
  • the headbox enables an efficient and cost-effective addition of the at least one further fluid into the at least one fibrous suspension which can be fluidized.

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Abstract

L'invention concerne une caisse de tête d'arrivée de pâte (1) pour une machine de production d'une bande continue de matière fibreuse (3), en particulier d'une bande continue de papier ou de carton, composée d'au moins une suspension de matière fibreuse (2), comprenant : un dispositif d'alimentation (4), acheminant au moins une suspension de matière fibreuse (2), une plaque perforée à tubes distributeurs (6), branchée en aval, présentant une pluralité de canaux (7) disposés en lignes (Z) et en rangées (S), un canal intermédiaire (8) situé en aval, s'étendant sur la largeur (B) de l'arrivée de pâte (1), comportant plusieurs moyens (9, 9.1), à distance entre eux, en direction de la largeur (B) de l'arrivée de pâte, pour l'addition dosée, de préférence réglée/commandée, d'un fluide (10) dans des courants partiels de fluide (10.T) dans au moins la suspension de matière fibreuse (2). La caisse de tête d'arrivée de pâte selon l'invention est caractérisée en ce que le moyen (9, 9.1) pour l'addition dosée, de préférence réglée/commandée, de fluide (10) dans des courants partiels de fluide (10.T) dans au moins la suspension de matière fibreuse (2), est configuré également en vue de l'addition dosée, de préférence réglée/commandée, d'au moins un autre fluide (19; 19, 24) dans des courants partiels de fluide (19.T; 19.T, 24.T) dans au moins la suspension de matière fibreuse (2), et en ce que le moyen individuel (9, 9.1) comprend, respectivement, plusieurs canaux d'addition dosée (20; 20, 25), présentant chacun une ouverture de canal d'addition dosée (20.1; 20.1, 25.1), débouchant à des hauteurs différentes, et connectés avec un canal d'alimentation commun (21; 21, 26) pour au moins l'autre fluide (19; 19, 24).
EP09760785A 2008-12-18 2009-10-22 Caisse de tête d'arrivée de pâte pour une machine de production d'une bande continue de matière fibreuse Not-in-force EP2379803B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008054897A DE102008054897A1 (de) 2008-12-18 2008-12-18 Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn
PCT/EP2009/063838 WO2010069650A1 (fr) 2008-12-18 2009-10-22 Caisse de tête d'arrivée de pâte pour une machine de production d'une bande continue de matière fibreuse

Publications (2)

Publication Number Publication Date
EP2379803A1 true EP2379803A1 (fr) 2011-10-26
EP2379803B1 EP2379803B1 (fr) 2012-09-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09760785A Not-in-force EP2379803B1 (fr) 2008-12-18 2009-10-22 Caisse de tête d'arrivée de pâte pour une machine de production d'une bande continue de matière fibreuse

Country Status (5)

Country Link
US (1) US8236138B2 (fr)
EP (1) EP2379803B1 (fr)
CN (1) CN102216520A (fr)
DE (1) DE102008054897A1 (fr)
WO (1) WO2010069650A1 (fr)

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US8236138B2 (en) 2012-08-07
EP2379803B1 (fr) 2012-09-19
CN102216520A (zh) 2011-10-12
WO2010069650A1 (fr) 2010-06-24
DE102008054897A1 (de) 2010-07-01

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