EP2379803B1 - 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 Download PDF

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Publication number
EP2379803B1
EP2379803B1 EP09760785A EP09760785A EP2379803B1 EP 2379803 B1 EP2379803 B1 EP 2379803B1 EP 09760785 A EP09760785 A EP 09760785A EP 09760785 A EP09760785 A EP 09760785A EP 2379803 B1 EP2379803 B1 EP 2379803B1
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EP
European Patent Office
Prior art keywords
metering
headbox
fluid
controllable
channels
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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.)
Not-in-force
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EP09760785A
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German (de)
English (en)
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EP2379803A1 (fr
Inventor
Marco Thomisch
Wolfgang Ruf
Volker Schmidt-Rohr
Markus Häußler
Hans Loser
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Voith Patent GmbH
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Voith Patent GmbH
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Publication of EP2379803A1 publication Critical patent/EP2379803A1/fr
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/022—Means for injecting material into flow within the headbox

Definitions

  • 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 respective Zudosierkanalö founded having, at different heights and connected to a common supply channel Zudosierkanäle for the fluid comprises, with a downstream Turb ulcer-generating means having a plurality of flow channels arranged in rows and in columns, and with a headbox nozzle immediately following the turbulence-generating means and having a nozzle gap.
  • From the DE 102 45 154 A1 is a headbox for a paper or board machine with at least one mixing chamber known.
  • a first fluid flows into the mixing chamber and at least a second fluid is added via metering channels which open at least partially at different heights.
  • the metering channels for the second fluid are at least partially provided in at least one metering blade introduced into the mixing chamber.
  • EP 0824 157 A 2 is a method for distributing a pulp suspension in the fabric run of a paper machine described.
  • the pulp suspension from at least one distributor is guided via a guide device into a nozzle, from which it emerges via a gap.
  • a headbox for a paper machine with a distributor for distributing a pulp suspension across the machine width is described.
  • the distributor is connected via a guide device with a nozzle, from which the pulp suspension emerges through a gap.
  • the headbox is connected to a metering device which has metering lines for metered addition of aggregates, with different metering lines leading to at least two different levels in the Z direction.
  • Such a headbox is referred to in professional circles as “dilution water headbox” and is for example from the German patents DE 44 16 898 A1 . DE 44 16 899 A1 and DE 44 16 909 A1 known.
  • German patent application DE 44 16 898 A1 shows a headbox for a paper machine with a feed device for the stock suspension, with a guide means comprising a plurality of channels, a mixing chamber located upstream of a guide means having a plurality of feed means distributed across the headbox for a fluid to be admixed differing in properties from the stock suspension and having a nozzle space subsequent to the guide means forming an exit slit for the stock suspension ,
  • the feed means for the admixed fluid extend substantially perpendicularly in the mixing chamber and have a plurality of admixing openings located one above the other.
  • German disclosure DE 44 16 899 A1 shows a headbox for a paper machine with a supply device for the pulp suspension, a first plurality of channels having guide means, a second plurality of channels having guide means, an intermediate mixing chamber, a subsequent, an exit slit for the stock suspension forming nozzle chamber and a plurality of transverse over the headbox distributed supply 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 Offenlegungsschrift DE 44 16 909 A1 a headbox for a papermaking machine having a stock suspension feeder, downstream guide means provided with a plurality of channels, downstream of which is a mixing chamber extending across the width of the headbox with a plurality of crossflow wells distributed substantially across the headbox, substantially in the flow direction extending partitions and distributed across the headbox feeders 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 inventive design of the headbox of the type mentioned 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.
  • the inventive design of the headbox even a satisfactory solution of the trilemma described in a uniform distribution of at least one other fluid over "Z", so in the height direction of the headbox.
  • the headbox according to the invention can also be designed as a single-layer headbox and optionally have properties which 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.
  • a spatially separated, spatially independent and uniform metered addition of the fluids with the aim of producing a fibrous web with high-quality properties.
  • 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 channels of the means connected to the common supply channel for the preferably controllable metering of the at least one further fluid in partial fluid streams into the at least one pulp suspension preferably open via metering channel openings in the at least one side, preferably in the two-sided lateral region of the means for preferably regularized / 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 Fluid partial streams in the at least one pulp suspension preferred a circular cross-sectional area with a diameter of 2 to 10 mm, preferably from 4 to 6 mm.
  • the common supply channel of the agent for preferably controllable metered addition of the at least one further fluid in partial fluid streams into the at least one pulp suspension preferably also has a circular cross-sectional area with a diameter of 6 to 20 mm, preferably 10 to 15 mm.
  • 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 means 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 provides essentially 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" metering essentially yields further process technology 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 reference: HPA14265 DE and applicant working title: "MJ II-DoS-TE geometry") 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, polyamidoamines, polyacrylamides, polyethyleneimines, cationic starch or guarderviate, or a dehydration accelerator, in particular polyamines or polyethyleneimines.
  • retention agent in particular high molecular weight compounds such as polyamines, polyamidoamines, polyacrylamides, polyethyleneimines, cationic starch or guarderviate, 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, inter alia, the regulation of both its fiber orientation transverse profile and its basis weight cross-section is possible.
  • 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 partial fluid streams into the at least one pulp suspension.
  • FIG. 1 shows a vertical and schematic longitudinal sectional view 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 multi-layer headbox, the at least two different pulp suspensions 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 a plurality of spaced in the width direction of the headbox 1 means 9 for preferably adjustable / controllable metering of a fluid 10 in partial fluid streams 10th 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 pulp suspension partial streams and after exiting the turbulence generating means in one Machine width chamber 15 in the design of a nozzle gap 17 having headbox 16 merged again to allow the formation of a machine-width fibrous web 3.
  • 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.
  • 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 of at least one pulp suspension 2.
  • the basic structure of this headbox 1 substantially corresponds to the basic structure of the in the FIG. 1 Headbox 1 shown schematically, so that reference is also made to this description of figures.
  • the feed device 4 is again followed downstream by a distribution well plate 6, which has a plurality of channels 7 arranged in rows Z and in columns S.
  • an over the width B (arrow) of the headbox 1 extending intermediate channel 8 connects, with a plurality of widthwise direction B (arrow) of the headbox 1 spaced apart means 9 for preferably controllable metered addition of a fluid 10th (Arrow) is provided in partial fluid streams 10.T (arrows) in the pulp suspension 2 (arrow).
  • the individual means 9 for preferably controllable metered addition comprises in each case a plurality of a respective metering channel opening 11.1 having 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 turbulence tube inserts with at least partially constant, at least partially diverging, formed at least partially converging and / or discontinuous cross-sectional areas.
  • the means 9 for preferably controllable metered addition of the fluid 10 in partial fluid streams 10.T (arrows) into the pulp suspension 2 also for preferably controllable metered addition of another fluid 19 in partial fluid streams 19.T (arrows) in the pulp suspension 2 trained.
  • the individual means 9 additionally comprises in each case a plurality of a metering channel opening 20.1 having a respective metering channel opening 20.1, opening at different heights and connected to a common supply channel 21, metering channels 20 for the further fluid 19.
  • the metering channels 20 of the means 9 connected to the common supply channel 21 lead to preferably controllable addition of the further fluid 19 into 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 means 9 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 Zudosierkanalötechnischen 11.1, 20.1 of Zudosierkanäle 11, 20 can turn, as in FIG. 2 shown aligned with each other.
  • FIG. 3 shows a vertical and schematic longitudinal partial sectional view of a second embodiment according to the invention 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 in the FIG. 2 Headbox 1 shown schematically, so that reference is also made to this description of figures.
  • the means 9 for the preferably controllable metered addition of the fluid 10 in partial fluid flows 10.
  • T into the pulp suspension 2 also for preferably controllable metered addition of two further fluids 19, 24 in partial fluid streams 19.T, 24.T (Arrows) formed in the pulp suspension 2.
  • 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 Anlagenen 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 11.1, 20.1, 25.1 of Zudosierkanäle 11, 20, 25 can turn, as in FIG. 3 shown aligned with each other.
  • FIGS. 4A to 4D show four schematic cross-sectional views of a means 9 for preferably controllable metered addition of two fluids 10, 19 in partial fluid streams 10.T, 19.T (arrows).
  • T (arrows) in the pulp suspension 2 have a circular cross-sectional area 20.A with a diameter of 20.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 be constant, conical or stepped, at least in regions.
  • 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 be used for preferably controllable metering of the further fluid 19 in partial fluid streams 19.
  • T (arrows) in the pulp suspension 2 also be arranged alternately.
  • FIG. 4A fully provided with the aforementioned reference numerals.
  • FIGS. 5A to 5D show four further schematic cross-sectional views of a means 9 for preferably controllable metered addition 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 of 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. 5A fully provided with the aforementioned reference numerals.
  • FIG. 6 shows a schematic side view of the means 9 for preferably controllable metered addition of two fluids 10, 19 (arrows) in partial fluid streams 10.T, 19.T (arrows) in the FIG. 2 illustrated headbox 1 for a machine for producing a fibrous web of 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 number: HPA14265 DE and applicant working title: "MJ II-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 respective headbox 1 of the invention FIGS. 2 to 6 flowing fluid 10 consists at least of water, in particular clear water or white water, or from at least one pulp suspension whose concentration differs from the average concentration of at least one in the headbox 1 flowing pulp suspension 2.
  • 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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Claims (15)

  1. Caisse de tête (1) pour une machine de fabrication d'une bande fibreuse (3), en particulier d'une bande de papier ou de carton, constituée d'au moins une suspension fibreuse (2), avec un dispositif d'alimentation (4) alimentant l'au moins une suspension fibreuse (2), avec une plaque perforée de tubes de distribution (6) se raccordant en aval et présentant une pluralité de canaux (7) disposés en lignes (Z) et en colonnes (S), avec un canal intermédiaire (8) situé en aval de celle-ci, s'étendant sur la largeur (B) de la caisse de tête (1), avec plusieurs moyens (9, 9.1) espacés les uns des autres dans la direction de la largeur (B) de la caisse de tête (1), pour l'ajout par dosage de préférence réglable/commandable d'un fluide (10) en flux partiels de fluide (10.T) dans l'au moins une suspension fibreuse (2), le moyen individuel (9, 9.1) comprenant à chaque fois plusieurs canaux d'ajout par dosage (11) pour le fluide (10), présentant une ouverture respective de canal d'ajout par dosage (11.1), débouchant à différentes hauteurs et connectés à un canal d'alimentation commun (12), avec un moyen de génération de turbulences (13) disposé en aval avec une pluralité de canaux d'écoulement (14) disposés en lignes (Z) et en colonnes (S), et avec une buse de caisse de tête (16) se raccordant directement au moyen de génération de turbulences (13) et présentant une fente de buse (17),
    caractérisée en ce que
    le moyen (9, 9.1) pour l'ajout par dosage de préférence réglable/commandable du fluide (10) en flux partiels de fluide (10.T) dans l'au moins une suspension fibreuse (2) est réalisé également pour l'ajout par dosage de préférence réglable/commandable d'au moins un fluide supplémentaire (19 ; 19, 24) en flux partiels de fluide (19.T ; 19.T, 24.T) dans l'au moins une suspension fibreuse (2), le moyen individuel (9, 9.1) comprenant à chaque fois plusieurs canaux d'ajout par dosage (20 ; 20, 25) pour l'au moins un fluide supplémentaire (19 ; 19, 24), présentant à chaque fois une ouverture respective de canal d'ajout par dosage (20.1 ; 20.1, 25.1), débouchant à différentes hauteurs et connectés à un canal d'alimentation commun (21 ; 21, 26).
  2. Caisse de tête (1) selon la revendication 1,
    caractérisée en ce que
    les canaux d'ajout par dosage (11) connectés au canal d'alimentation commun (12) du moyen (9, 9.1) pour l'ajout par dosage de préférence réglable/commandable du fluide (10) en flux partiels de fluide (10.T) dans l'au moins une suspension fibreuse (2) débouchent par le biais d'ouvertures de canal d'ajout par dosage (11.1) dans la région aval (22) du moyen (9, 9.1) pour l'ajout par dosage de préférence réglable/commandable et en ce que les canaux d'ajout par dosage (20 ; 20, 25) connectés au canal d'alimentation commun (21 ; 21, 26) du moyen (9, 9.1) pour l'ajout par dosage de préférence réglable/commandable de l'au moins un fluide supplémentaire (19 ; 19, 24) en flux partiels de fluide (19.T ; 19.T, 24.T) dans l'au moins une suspension fibreuse (2) débouchent par le biais d'ouvertures de canal d'ajout par dosage (20.1 ; 20.1, 25.1) dans la région latérale (23) au moins d'un côté, de préférence des deux côtés, du moyen (9, 9.1) pour l'alimentation par dosage de préférence réglable/commandable.
  3. Caisse de tête (1) selon la revendication 1 ou 2,
    caractérisée en ce que
    les canaux d'ajout par dosage (20) connectés au canal d'alimentation commun (21) du moyen (9, 9.1) pour l'ajout par dosage de préférence réglable/commandable de l'au moins un fluide supplémentaire (19) en flux partiels de fluide (19.T) dans l'au moins une suspension fibreuse (2) débouchent par le biais d'ouvertures de canal d'ajout par dosage (20.1) dans la région latérale (23) au moins d'un côté, de préférence des deux côtés, du moyen (9, 9.1) pour l'ajout par dosage de préférence réglable/commandable suivant un angle (α) de 0 à 180°, de préférence de 45 à 135°, notamment d'environ 90°, par rapport à la direction d'écoulement (R) de l'au moins une suspension fibreuse (2).
  4. Caisse de tête (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le canal d'ajout par dosage (20) connecté au canal d'alimentation commun (21) du moyen (9, 9.1) pour l'ajout par dosage de préférence réglable/commandable de l'au moins un fluide supplémentaire (19) en flux partiels de fluide (19.T) dans l'au moins une suspension fibreuse (2) présente une surface en section transversale ronde circulaire (20.A) ayant un diamètre (20.D) de 2 à 10 mm, de préférence de 4 à 6 mm.
  5. Caisse de tête (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le canal d'alimentation commun (21) du moyen (9, 9.1) pour l'ajout par dosage de préférence réglable/commande de l'au moins un fluide supplémentaire (19) en flux partiels de fluide (19.T) dans l'au moins une suspension fibreuse (2) présente une surface en section transversale ronde circulaire (21.A) ayant un diamètre (21.D) de 6 à 20 mm, de préférence de 10 à 15 mm.
  6. Caisse de tête (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    les canaux d'ajout par dosage (20) du moyen (9, 9.1) pour l'ajout par dosage de préférence réglable/commandable de l'au moins un fluide supplémentaire (19) en flux partiels de fluide (19.T) dans l'au moins une suspension fibreuse (2), connectés au canal d'alimentation commun (21) et débouchant dans la région latérale (23) des deux côtés du moyen (9, 9.1) pour l'ajout par dosage de préférence réglable/commandable par le biais d'ouvertures de canal d'ajout par dosage (20.1), sont disposés en alternance.
  7. Caisse de tête (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    les canaux d'ajout par dosage (20 ; 20, 25) débouchant à différentes hauteurs du moyen (9, 9.1) pour l'ajout par dosage de préférence réglable/commandable pour l'au moins un fluide supplémentaire (19 ; 19, 24) sont disposés à égales distances (A).
  8. Caisse de tête (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le nombre des canaux d'ajout par dosage (20 ; 20, 25) du moyen (9, 9.1) pour l'ajout par dosage de préférence réglable/commandable pour l'au moins un fluide supplémentaire (19 ; 19, 24) est égal au nombre des lignes (Z) de canaux d'écoulement (14) du moyen de génération de turbulences (13) disposé en aval.
  9. Caisse de tête (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le nombre des canaux d'ajout par dosage (20 ; 20, 25) du moyen (9, 9.1) pour l'ajout par dosage de préférence réglable/commandable pour l'au moins un fluide supplémentaire (19 ; 19, 24) est égal au nombre des canaux d'écoulement (14) du moyen de génération de turbulences (13) disposé en aval.
  10. Caisse de tête (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    les moyens (9, 9.1) pour l'ajout par dosage de préférence réglable/commandable des au moins deux fluides (10, 19 ; 10, 19, 24) présentent une division (T) de préférence identique dans la direction de la largeur (B) de la caisse de tête (1) de l'ordre de 10 à 100 mm, de préférence de 25, 33, 50 ou 66 mm.
  11. Caisse de tête (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le moyen (9) respectif pour l'ajout par dosage de préférence réglable/commandable des au moins deux fluides (10, 19 ; 10, 19, 24) en flux partiels de fluide (10.T, 19.T ; 10.T, 19.T, 24.T) dans l'au moins une suspension fibreuse (2) comprend une lame de dosage (9.1).
  12. Caisse de tête (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le moyen (9) réalisé de préférence sous forme de lame de dosage (9.1) pour l'ajout par dosage de préférence réglable/commandable des au moins deux fluides (10, 19 ; 10, 19, 24) en flux partiels de fluide (10.T, 19.T ; 10.T, 19.T, 24.T) dans l'au moins une suspension fibreuse (2) présente une longueur (9.L) de l'ordre de 60 à 350 mm, de préférence de 100 à 250 mm, et une hauteur (9.H) de l'ordre de 50 à 300 mm, de préférence de 75 à 250 mm.
  13. Caisse de tête (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le fluide (10) se compose au moins d'eau, notamment d'eau blanche ou d'eau claire, ou au moins d'une suspension fibreuse dont la concentration est différente de la concentration moyenne de l'au moins une suspension fibreuse (2) s'écoulant dans la caisse de tête (1).
  14. Caisse de tête (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    l'au moins un fluide supplémentaire (19 ; 19, 24) comprend au moins un moyen de retenue, notamment des composés à haut poids moléculaire tels que des polyamines, des polyamidoamines, des polyacrylamides, des polyéthylèneimines, des amidons cationiques ou des dérivés de guar, ou des accélérateurs de déshydratation, notamment des polyamines ou des polyéthylèneimines.
  15. Machine de fabrication d'une bande fibreuse (3), en particulier d'une bande de papier ou de carton, comprenant au moins une caisse de tête (1) selon l'une quelconque des revendications 1 à 14.
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 EP2379803A1 (fr) 2011-10-26
EP2379803B1 true EP2379803B1 (fr) 2012-09-19

Family

ID=41478655

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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DE102010001555A1 (de) 2010-02-03 2011-08-04 Voith Patent GmbH, 89522 Ventil zum Regulieren eines Fluidstroms
DE102010001557A1 (de) 2010-02-03 2011-08-04 Voith Patent GmbH, 89522 Ventil zum Regulieren eines Fluidstroms
DE102010028403A1 (de) 2010-04-30 2011-11-03 Voith Patent Gmbh Ventil zum Regulieren eines Fluidstroms
DE102010028404A1 (de) 2010-04-30 2011-11-03 Voith Patent Gmbh Ventil zum Regulieren eines Fluidstroms
DE102010028408A1 (de) 2010-04-30 2011-11-03 Voith Patent Gmbh Ventil zum Regulieren eines Fluidstroms
DE102010030352A1 (de) 2010-06-22 2011-12-22 Voith Patent Gmbh Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn
DE102010038891A1 (de) 2010-08-04 2012-02-09 Voith Patent Gmbh Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn
DE102011079715A1 (de) 2011-07-25 2013-01-31 Voith Patent Gmbh Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn
DE102011083085A1 (de) 2011-09-21 2013-03-21 Voith Patent Gmbh Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn
DE102013209998A1 (de) * 2013-05-29 2014-05-22 Voith Patent Gmbh Konstantteil-Mischvorrichtung
CN109629307B (zh) * 2018-12-29 2021-06-08 绍兴州致电子有限公司 一种造纸机流浆箱
CN114197235B (zh) * 2021-12-20 2023-07-14 浙江华章科技有限公司 一种便于维护的水力式流浆箱

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Also Published As

Publication number Publication date
EP2379803A1 (fr) 2011-10-26
DE102008054897A1 (de) 2010-07-01
WO2010069650A1 (fr) 2010-06-24
US20110290440A1 (en) 2011-12-01
CN102216520A (zh) 2011-10-12
US8236138B2 (en) 2012-08-07

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