EP2464782A2 - Caisse de tête pour une machine servant à fabriquer une bande de matière fibreuse et machine - Google Patents

Caisse de tête pour une machine servant à fabriquer une bande de matière fibreuse et machine

Info

Publication number
EP2464782A2
EP2464782A2 EP10718119A EP10718119A EP2464782A2 EP 2464782 A2 EP2464782 A2 EP 2464782A2 EP 10718119 A EP10718119 A EP 10718119A EP 10718119 A EP10718119 A EP 10718119A EP 2464782 A2 EP2464782 A2 EP 2464782A2
Authority
EP
European Patent Office
Prior art keywords
headbox
metering
fluid
pulp suspension
arrow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10718119A
Other languages
German (de)
English (en)
Inventor
Wolfgang Ruf
Konstantin Fenkl
Markus Häußler
Ole Hansen
Karl Bunz
Thomas Böhringer
Thomas RÜHL
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 EP2464782A2 publication Critical patent/EP2464782A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/022—Means for injecting material into flow within the headbox
    • 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
    • D21F1/024—Details of the feed chamber

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 a paper, board or tissue web, from at least one pulp suspension, with a feed device feeding at least one pulp suspension, with one immediately after the feeder in the flow direction of the at least one pulp suspension and a plurality of distributed in rows and in columns flow channels distribution tube plate, with one of the Verteil- perforated plate in the flow direction of at least one pulp suspension immediately adjoining, extending in the direction of the headbox and two preferably machine-wide walls having intermediate channel, with a Interchannel in the flow direction of the at least one pulp suspension immediately subsequent turbulence generating means having a plurality of arranged in rows and in columns flow control channels, and having a headbox nozzle immediately adjacent to the turbulence generating means in the flow direction of the at least one pulp suspension, wherein the feeder, the distribution well plate and the intermediate channel are arranged in a first alignment plane and the turbulence generating means and the headbox nozzle in a second alignment plane and wherein the two plane
  • Such a headbox has been known in the art for many years and is described, for example, by the company Voith Paper under the name "W It is preferably used in paper or board machines with a forming unit comprising a wire, a so-called fourdrinier wire.
  • Such a headbox with the described dilution water technology is known, for example, from the document DE 41 19 593 C2 ("ModuleJet").
  • the preferably controllable metered addition of the dilution water in partial streams into the at least one pulp suspension takes place through inlet openings in the wall of the In order to limit the effect of the added dilution water locally, in some cases partitions are placed in the mixing chamber.
  • Such a headbox with the described dilution water technology may also be equipped with an alternative dilution water system such as "Jetco”, “Annular Slot Injection” or “Injection System.”
  • dilution water systems from reputable manufacturers of fiber web production machines are systems, the requirements for a good mixing of pulp suspension and dilution water, a sufficient volume flow constancy, a small effective width and a low mapping offset more or less good or only partially meet.
  • a headbox of the aforementioned type that at least one preferably machine-wide wall of the intermediate channel and in the width direction of the headbox spaced-apart means for preferably controllable rule metered addition of a fluid in partial fluid streams in the at least one Fibrous suspension are arranged, that the individual means for preferably controllable / controllable metered addition of the fluid in partial fluid streams in the at least one pulp suspension each having a plurality of Zudosierkanalö Stamm and Zudosierkanalffenline and opening at different heights - -
  • Zudosierkanäle includes and that the individual Zudosierkanalö Stamm a Zudo- sierkanals of the means for preferably controllable rule metered addition of the fluid in fluid fractions in the at least one pulp suspension is aligned so that the Zudosierkanalstoffline this Zudosierkanals impinges on the turbulence generating means in forming a point of impact.
  • the turbulence generating means is preferably a turbulence generator known to the person skilled in the art.
  • the inventive improvement of the headbox of the type mentioned allows the realization of a technically simple and reliable dilution water system. Even with dilution water or fluid quantities that are possibly very different locally, good volume flow constancy is achieved over the entire machine width and, due to the addition of the dilution water or fluid in the direct intake region of the turbulence generation means, a narrow and sharply delineated active response is produced in the fibrous web.
  • a "vagrancy" of the partial flow of dilution water or fluid can only take place to a very limited extent by the targeted, locally stable and preferably controllable addition of the dilution water or of the fluid and the intensive mixing in the flow channels of the flow channel following the metering region Turbulence generating means with separate guidance of the mixed streams up to the beginning of the headbox out so the requirements for an optimal dilution water system largely, preferably even completely met.
  • the inventive improvement of the headbox of the type mentioned is suitable as a cheaper retrofit solution with less downtime compared with the already known retrofit solutions.
  • Fluids are provided in partial streams in the at least one pulp suspension.
  • the remaining components and groups of the previous headbox can be made without any changes and continue to be used.
  • the inventive improvement of the headbox of the type mentioned can be completed problem and effortlessly in the local environment of the existing machine for producing a fibrous web.
  • both walls so both the bottom wall and the upper wall of the intermediate channel with the means for preferably tax- / rule ble metering of dilution water or fluid in partial streams are provided in the at least one pulp suspension ,
  • the individual metering channel opening of the metering channel of the means for preferably controllable metered addition of the fluid in partial fluid streams into the at least one fibrous suspension is oriented such that the metering channel center line of this metering channel is preferably approximately centrally, in particular centrally between the gaps of two adjacent Flow channels impinges on the turbulence generating means at training devisg an impact point.
  • the metered partial fluid flow does not flow directly into at least one flow channel of the turbulence generating means, very stable conditions with regard to the volume flow constancy are achieved.
  • water jet pump effects and similar phenomena are avoided to the greatest possible extent and only lead to slight changes in the case of changing volumes of the partial fluid streams.
  • a further preferred embodiment provides that the flow channels arranged in one row of the turbulence generating means have a line division of the flow channels and that the metering channel center lines of the metering channels are spaced apart from one another in the width direction of the head box Means for preferably controllable metered addition of the fluid in partial fluid streams into the at least one pulp suspension associated with the flow channels of the turbulence generating means arranged in this row have a line division of the metering passage centerlines, the line division of the metering passage centerlines having the same or double value Line division of the flow channels assumes. If the two line divisions now assume the same value, exactly one line of metering channels is assigned to each line of flow channels. On the other hand, if the line division of the metering channel center lines assumes twice the value of the line division of the flow channels, only one line of metering channels is assigned to each second row of flow channels.
  • a further preferred embodiment provides that the individual Zudosierkanalö Stamm the Zudosierkanals the means for preferably controllable / metered metered addition of the fluid in partial fluid streams in the at least one pulp suspension is aligned so that the Zudosierkanalstoffline this Zudosierkanals preferably outside the line of the adjacent flow channels on the Turbulence generating means impinges upon formation of a point of impact.
  • the out-of-phase impact of the metering channel center line can assume a value of up to 50% of the column pitch of the flow channels.
  • the effective impact surface can be effectively increased, so that once again very stable conditions with regard to the volume flow constancy are achieved.
  • the flow channels of the turbulence generation means arranged in one column preferably have a column division of the flow channels and the metering channel center lines of the metering channels of the means for preferably controllable or metered addition of the fluid into partial fluid streams into the at least one pulp suspension which discharges into this
  • Column arranged flow channels of the turbulence generating means are assigned, preferably a column pitch of Zudosierkanalstofflinen on wherein the column pitch of the metering channel centerlines may take on the same or double the column pitch of the flow channels. If the two column divisions now assume the same value, each column of flow channels is assigned exactly one column of metering channels. On the other hand, if the column pitch of the metering channel center lines assumes twice the value of the column pitch of the flow channels, then only every second column of flow channels is assigned a column of metering channels.
  • the flow channels of the turbulence generating means arranged in two adjacent rows can be offset relative to one another, preferably offset from one another in the middle.
  • the distance between the flow channels of the turbulence generating means arranged in adjacent rows is markedly increased. And this in turn leads to an advantageous increase in the effective impact area, so that in turn very stable conditions in terms of volume flow constancy are achieved.
  • all Zudosierkanäle the means for preferably controllable / rule ble metering of the fluid in partial fluid streams in the at least one pulp suspension with a common and preferably in the region of the agent in the Zudosierkanäle branching supply channel.
  • each Zudosierkanal the means for preferably controllable / rule ble metering of the fluid in partial fluid streams in the at least one pulp suspension is connected to its own supply channel.
  • the means for preferably controllable metered addition of the fluid into partial fluid streams into the at least one pulp suspension is preferably arranged on the inside of the preferably machine-wide wall of the intermediate channel. However, it may also be arranged on both sides of the preferably machine-wide wall of the intermediate channel, if the immediate room conditions allow.
  • the means for preferably controllable rule metered addition of the fluid in fluid fractions in the at least one pulp suspension has to the turbulence generating means preferably a vertical and equal or approximately equal distance in the range of 1 to 50 mm, preferably from 3 to 30 mm, in particular from 10 to 30 mm, on.
  • the turbulence generating means preferably a vertical and equal or approximately equal distance in the range of 1 to 50 mm, preferably from 3 to 30 mm, in particular from 10 to 30 mm, on.
  • the metering channel of the means for preferably controllable or metered metered addition of the fluid in partial fluid streams into the at least one pulp suspension may have, at least in regions, a constant or a preferably suddenly widening cross-sectional area. This can improve the distribution in the z direction.
  • 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 and shown in German, but not previously published patent application DE 10 2008 054 898.7 from 18.12.2008.
  • the relevant disclosure content is hereby made the subject of the present description.
  • the fluid preferably consists of water, in particular clear water, or of a pulp suspension, in particular white water, the concentration of which differs from the average concentration of the at least one pulp suspension flowing in the headbox.
  • the headbox according to the invention is outstandingly suitable for use in a machine for producing a fibrous web, in particular a paper, board or tissue 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, the control of both its fiber orientation transverse profile and its basis weight cross-section is possible.
  • Figure 1 is a vertical and schematic longitudinal sectional view of an embodiment of a headbox for a machine for producing a fibrous web according to the prior art
  • FIG. 2 is a partial and schematic sectional view of a first embodiment of a headbox according to the invention for a machine for producing a fibrous web
  • FIG. 2A shows a view of the means shown in FIG. 1 for the preferably controllable metered addition of the fluid in fluid sub-streams into the pulp suspension according to the view arrow P1
  • Figure 3 is a partial and schematic sectional view of a second embodiment of a head box according to the invention for a machine for producing a fibrous web
  • Figure 4 is a partial and schematic sectional view of a third embodiment of a head box according to the invention for a machine for producing a fibrous web
  • FIG. 5 is a partial and schematic sectional view of a fourth embodiment of a headbox according to the invention for a machine for producing a fibrous web
  • FIG. 5A is a view of the means shown in FIG. 5 for preferably controllable metered addition of the fluid in fluid sub-streams into the pulp suspension according to the view arrow P2
  • FIG. 5B shows a view of the means shown in FIG. 5 for preferably metered addition of the fluid into fluid fractions into the pulp suspension according to the view arrow P3
  • FIG. 6 shows an illustration of a first metering concept of a head box according to the invention for a machine for producing a fibrous web
  • FIG. 5A is a view of the means shown in FIG. 5 for preferably controllable metered addition of the fluid in fluid sub-streams into the pulp suspension according to the view arrow P2
  • FIG. 5B shows a view of the means shown in FIG. 5 for preferably metered addition of the fluid into fluid fractions into the pulp suspension according to the view arrow P
  • FIG. 7 shows a representation of a second metering concept of a head box according to the invention for a machine for producing a fibrous web.
  • FIG. 1 shows a vertical and schematic longitudinal section of an exemplary embodiment of a 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 waste, the NEN at least two different Faserstoffsuspensio- used for the production of the fibrous web 3.
  • the fibrous web 3 may in particular be a paper, board or tissue web.
  • the headbox 1 has a feeding device 4 which feeds the pulp suspension 2, for example in the embodiment of an illustrated transverse dividing pipe 5 or a rotary distributor (not illustrated) with a multiplicity of hoses.
  • the feed device 4 is adjoined in the direction of flow R (arrow) of the pulp suspension 2 directly by, for example, a three-part distribution well plate 6, which has a multiplicity of flow channels 7 arranged in three rows Z and in columns S.
  • the number of lines Z can also be smaller or larger than three.
  • the intermediate channel 8 is immediately followed by, for example, three-line turbulence generating means 10 having a multiplicity of flow channels 11 arranged in three rows Z and in columns S (compare FIGS. 6 and 7).
  • the number of lines Z can also be smaller or larger than three.
  • the pulp suspension 2 in the turbulence generating means 10 is divided into pulp suspension sub-streams and reunited after exiting the turbulence generating means 10 in a machine-width chamber 12 in the form of a headbox 13 having a nozzle gap 14 to facilitate the formation of a machine-width fibrous web 3 enable.
  • the flow channels 6 of the turbulence-generating means 10 are preferably formed in a known manner as thin-walled turbulence tubes and / or turbulence tube inserts with at least partially constant, at least partially diverging, at least partially converging and / or discontinuous cross-sectional areas.
  • the headbox 13 may optionally be provided on the outlet side with at least one aperture 15 indicated by dashed lines. Also, in the headbox 13 at least one, well-known to those skilled and not explicitly illustrated separating element, in particular a blade be arranged. If a plurality of separating elements, in particular lamellas, are arranged in the headbox nozzle 13, they can have different lengths and possibly also different properties, such as surface contours and the like.
  • the feed device 4, the distribution well plate 6 and the intermediate channel 8 are arranged in a first orientation plane AE.1 and the turbulence generating means 10 and the headbox nozzle 13 in a second orientation plane AE.2.
  • the two alignment planes AE.1, AE.2 include an obtuse angle ⁇ in the range of> 90 and ⁇ 180 °, preferably of> 100 and ⁇ 170 °, in particular of> 1 10 and ⁇ 160 °.
  • the headbox 1 thus has a substantial deflection 16.
  • FIG. 2 shows a partial and schematic sectional view of a first embodiment of a headbox 1 according to the invention for a machine for producing a fibrous web from a pulp suspension 2 (arrow).
  • the illustrated extract is indicated in the figure 1 with a dashed circle K.
  • the individual metering channel 19 may, for example, have a round inner contour with an inner diameter of 14 mm.
  • T (arrow) in the at least one pulp suspension 2 (arrow) is aligned so that the Zudosierkanalffenlinin 19.
  • M of this Zudosierkanals 19 impinges on the turbulence generating means 10 when forming a point of impact AP.
  • the individual Zudosierkanalö réelle 19.1 of Zudosierkanals 19 is aligned so that it preferably impinges outside the line Z.1, Z.3 of the adjacent flow channels 1 1 on the turbulence generating means 10 in forming the respective point of impact AP.
  • T (arrow) in the pulp suspension 2 (arrow) with a common supply channel 20 is connected, for example, a round inner contour with a Inner diameter of 20 mm may have.
  • the supply channel 20 branches in the region of the means 17 by means of a supply space 20.1 into the metering channels 19 (see FIG. 5B).
  • the supply channel 20 is in turn connected to a not shown supply system for the fluid 18 (arrow), wherein - -
  • the individual metering channel 19 of the means 17 for preferably controllable metered addition of the fluid 18 (arrow) into partial fluid streams 18.T (arrow) into the pulp suspension 2 (arrow) has, at least in regions, a constant or a preferably suddenly expanding cross-sectional surface 19.A. on.
  • the means 17 for preferably controllable / metered addition of the fluid 18 (arrow) in partial fluid streams 18.T (arrow) in the pulp suspension 2 (arrow) on the inside of the preferably machine-wide wall 9.2 of the intermediate channel 8 is arranged.
  • T (arrow) in the pulp suspension 2 (arrow) to the turbulence generating means 10 is a vertical and equal or approximately the same distance A in the range of 1 to 50 mm, preferably from 3 to 30 mm, in particular from 10 to 30 mm.
  • FIG. 2A shows a view of the means 17 shown in FIG. 1 for preferably controllable metered addition of the fluid 18 (arrow) into partial fluid streams 18.T (arrow) into the pulp suspension 2 (arrow) according to the view arrow P1.
  • Dosing channel centerlines 19.M having Zudosierkanälen 19 includes, as it - -
  • FIG 3 shows a partial and schematic sectional view of a second embodiment of a headbox 1 according to the invention for a machine for producing a fibrous web from a pulp suspension 2 (arrow).
  • the illustrated extract is indicated in the figure 1 with a dashed circle K.
  • the single Zudosierkanal 19 may for example have a round inner contour with an inner diameter of 14 mm.
  • branching supply channel 20 connected, which may for example have a round inner contour with an inner diameter of 20 mm.
  • the supply channel 20 has a different shape than that in the
  • Figure 2 shown supply channel 20 and in turn it is connected to a supply system for the fluid 18 (arrow), not shown, preferably in the supply channel 20 and / or in the supply system known in the art and thus not explicitly shown means, such as Valve, for controllable cash metering of the fluid 18 (arrow) is present.
  • a supply system for the fluid 18 arrow
  • Valve for controllable cash metering of the fluid 18 (arrow) is present.
  • the individual metering channel 19 of the means 17 for preferably controllable metered addition of the fluid 18 (arrow) into partial fluid streams 18.T (arrow) into the pulp suspension 2 (arrow) has, at least in regions, a constant or a preferably suddenly expanding cross-sectional surface 19.A. on. Also, the means 17 for preferably controllable / metered addition of the fluid 18 (arrow) in partial fluid streams 18.T (arrow) in the pulp suspension 2 (arrow) on the inside of the preferably machine-wide wall 9.2 of the intermediate channel 8 is arranged.
  • T (arrow) in the pulp suspension 2 (arrow) to the turbulence generating means 10 is a vertical and equal or approximate same distance A in the range of 1 to 50 mm, preferably from 3 to 30 mm, in particular from 10 to 30 mm, on.
  • the means 17 for preferably controllable metered addition of the fluid 18 (arrow) into partial fluid streams 18.T (arrow) into the pulp suspension 2 (arrow) comprises a metering blade 17.1 with metering channel openings 19.1 and metering channel center lines 19.M having metering channels 19, as described and shown in the German, but not previously published patent application DE 10 2008 054 898.7 from 18.12.2008.
  • the relevant disclosure content is hereby made the subject of the present description.
  • FIG. 4 shows a partial and schematic sectional view of a third embodiment of a headbox 1 according to the invention for a machine for producing a fibrous web from a pulp suspension 2 (arrow).
  • the illustrated extract is indicated in the figure 1 with a dashed circle K.
  • the basic structure of this headbox 1 substantially corresponds to the basic structure of the headbox 1 shown schematically in FIG. 1, so that reference is also made to this description of the figures.
  • On the upper and preferably machine-wide wall 9.2 of the intermediate channel 8 are again several and in the width direction B (arrow) of the headbox 1 spaced-apart means 17 for preferably controllable / metered addition of the fluid 18 (arrow) in partial fluid flows 18.T (arrows ) are arranged in the pulp suspension 2 (arrow). Due to the metered addition of the fluid 18 (arrow) in partial fluid streams 18.T (arrow) into the pulp suspension 2 (arrow), mixed partial flows 2.1 (arrow) result, which are then combined in the headbox nozzle into a combined mixed flow.
  • the individual metering channel 19 may, for example, have a round inner contour with an inner diameter of 14 mm.
  • the individual metering channel opening 19. 1 of the metering channel 19 is aligned in such a way that it preferably adjoins the turbulence generating means 10 outside the row R. 1, R. 3 of the adjacent flow channels 11
  • the various supply channels 20 of a means 17 are combined outside the means 17 in turn to a common supply channel 20.1, which in turn is connected to a supply system, not shown, for the fluid 18 (arrow).
  • a common supply channel 20.1 and / or in the supply system is preferably known in the art and thus not explicitly shown means, such as a valve, for controllable cash metered addition of the fluid 18 (arrow) available.
  • the individual metering channel 19 of the means 17 for preferably controllable metered addition of the fluid 18 (arrow) into partial fluid streams 18.T (arrow) into the pulp suspension 2 (arrow) has, at least in regions, a constant or a preferably suddenly expanding cross-sectional surface 19.A. on.
  • the means 17 for preferably controllable / metered addition of the fluid 18 (arrow) in partial fluid streams 18.T (arrow) in the pulp suspension 2 (arrow) on the inside of the preferably machine-wide wall 9.2 of the intermediate channel 8 is arranged.
  • T (arrow) in the pulp suspension 2 (arrow) to the turbulence generating means 10 is a vertical and equal or approximate same distance A in the range of 1 to 50 mm, preferably from 3 to 30 mm, in particular from 10 to 30 mm, on.
  • the means 17 for preferably controllable metered addition of the fluid 18 (arrow) into partial fluid streams 18.T (arrow) into the pulp suspension 2 (arrow) comprises a metering blade 17.1 with metering channel openings 19.1 and metering channel openings. tellinia 19.M having Zudosierkanälen 19, as described and shown in German, but not previously published patent application DE 10 2008 054 898.7 from 18.12.2008. The relevant disclosure content is hereby made the subject of the present description.
  • FIG. 5 shows a partial and schematic sectional view of a fourth embodiment of a headbox 1 according to the invention for a machine for producing a fibrous web from a pulp suspension 2 (arrow).
  • the illustrated extract is indicated in the figure 1 with a dashed circle K.
  • the single Zudosierkanal 19 may for example have a round inner contour with an inner diameter of 14 mm.
  • the individual metering channel opening 19. 1 of the metering channel 19 is aligned such that it preferably adjoins the turbulence generating means 10 outside the line Z. 1, Z. 3 of the adjacent flow channels 11
  • the metering channels 19 of the means 17 for preferably controllable or metered metered addition of the fluid 18 (arrow) into partial fluid streams 18.T (arrow) into the pulp suspension 2 (arrow) are in a separate metering part 19.2 on the inside, preferably on the machine-wide wall 9.2 of the intermediate channel 8, whereas the supply channel 20 and the supply space 20.1 are arranged on the outside of the preferably machine-wide wall 9.2 of the intermediate channel 8 in a separate supply part 20.2.
  • the supply channel 20 of the means 17, which may for example have a round inner contour with an inner diameter of 20 mm, is in turn connected to a not shown supply system for the fluid 18 (arrow).
  • In the common supply channel 20.1 and / or in the supply system is preferably known in the art and thus not explicitly shown means, such as a valve, for the control / rule Baren dosing of the fluid 18 (arrow) available.
  • the individual metering channel 19 of the means 17 for preferably controllable metered addition of the fluid 18 (arrow) into partial fluid streams 18.T (arrow) into the pulp suspension 2 (arrow) has, at least in regions, a constant or a preferably suddenly expanding cross-sectional surface 19.A. on.
  • T (arrow) in the pulp suspension 2 (arrow) to the turbulence generating means 10 is a vertical and equal or approximate same distance A in the range of 1 to 50 mm, preferably from 3 to 30 mm, in particular from 10 to 30 mm, on.
  • the means 17 for preferably controllable metered addition of the fluid 18 (arrow) in partial fluid streams 18.T (arrow) into the pulp suspension 2 (arrow) comprises a metering blade 17.1 with Zudosierkanalö Stamm 19.1 and Zudosierkanalmit- tellinien 19.M having Zudosierkanälen 19 such it is described and shown in German, but not previously published patent application DE 10 2008 054 898.7 from 18.12.2008. The relevant disclosure content is hereby made the subject of the present description.
  • FIG. 5A shows a view of the means 17 shown in FIG. 5 for preferably controllable metered addition of the fluid 18 (arrow) into partial fluid streams 18.T (arrow) into the pulp suspension 2 (arrow) according to the view arrow P2.
  • FIG. 5B shows a view of the means shown in FIG. 5 for the preferably controllable metered addition of the fluid 18 (arrow) into partial fluid streams 18. T (arrow) into the pulp suspension 2 (arrow) according to the view arrow P3.
  • the shown and having a rectangular cross-section supply part 20.2 of the means 17 has a supply space 20.1, which is connected to the supply channel 20. From the supply space 20.2, the three dosing channels 19 indicated by dashed lines pass over the wall 9.2 of the intermediate chamber 8 into the metering part 19.2 of the means 17 (see FIG.
  • the two Figures 6 and 7 show two Zudosiermaie a headbox 1 according to the invention for a machine for producing a fibrous web.
  • the flow channels 11 of the turbulence generating means 10 are arranged by way of example in three rows Z.1 to Z.3 and four meander-shaped columns S.1 to S.4.
  • flow channels 11 of the turbulence generating means 10 are arranged offset to one another. In the two present illustrations, they are arranged centrally offset from each other, so that the flow channels 11 of the lower
  • Line Z.1 and the flow channels 11 of the top line Z.3 have the same arrangement in the width directions B (double arrow) of the headbox 1. Of course, those arranged in adjacent lines Z.1, Z.2 and Z.3
  • Flow channels 11 of the turbulence generating means 10 may be arranged without offset from each other.
  • Zudosierkanalötechnisch 19.1 of Zudosierkanäle 19 a dashed lines and designed as a metering 17.1 means 17 for preferably, controllable metered addition of the fluid in partial fluid streams into the at least one pulp suspension.
  • the individual metering channel opening 19.1 of the metering channel 19 of the means 17 is aligned so that the metering channel center line 19.M of each metering channel 19 of the means 17 approximately centrally, in particular centrally between the columns S.2 and S.3 two adjacent flow channels 11 on the turbulence generating means 10 impinges upon formation of a respective impact point AP.
  • the flow channels 11 of the turbulence generating means 10 arranged in a row Z.1, Z.2 and Z.3 have a line division of the flow channels TZ.11.
  • the line division of the flow channels may, for example, assume a value of 25, 33, 50, 66 or 100 mm.
  • the Zudosierkanalstofflinien 19.M the Zudosierkanäle 19 of the width direction B (arrow) of the headbox 1 spaced-apart means 17, which are assigned to the arranged in this row Z.1, Z.2 and Z.3 flow channels 1 1 of the turbulence generating means 10, have a line division of the Zuzosierkanal Mittellienien TZ.19.M on.
  • the line division of the metering channel center lines TZ.19.M assumes twice the value of the line division of the flow channels TZ.1 1.
  • the two line divisions TZ.19.M and TZ.11 can also assume the same value.
  • the flow channels 11 of the turbulence generating means 10 arranged in a column S.2 and S.3 have a column pitch of the flow channels TS.11.
  • the metering channel center lines 19.M of the metering channels 19 of the means 17 opening at different heights which are assigned to the flow channels 1 1 of the turbulence generating means 10 arranged in this column S.2 and S.3, have a column pitch of the metering channel center lines TS.19.M.
  • the column pitch of the metering channel center lines TS.19.M assumes the same value of the column pitch of the flow channels TS.11.
  • all rows Z.1, Z.2 and Z.3 of flow channels 11 of the turbulence generating means 10 are each assigned a row of metering channels 19 of the means 17.
  • the whole amount of pulp suspension is supplied with the fluid in partial fluid streams.
  • the column pitch of the metering channel center lines TS.19.M assumes twice the value of the column pitch of the flow channels TS.1 1.
  • lines Z.1 and Z.3 of flow channels 11 of the turbulence generating means 10 are each assigned a row of metering channels 19 of the means 17.
  • only 2/3 of the amount of pulp suspension are supplied with the fluid in partial fluid streams.
  • the individual Zudosierkanalö réelle 19.1 of Zudosierkanals 19 of the means 7 in Figures 6 and 7 is aligned so that the Zudosierkanstofflinem 19.M this Zudosierkanals 19 outside the line Z.1, Z.2 and Z.3 ( Figure 6) or Z.1 and Z.3 ( Figure 7) of the adjacent flow channels 11 impinges on the turbulence generating means 10 when the impact point AP is formed.
  • the fluid 18 used in the embodiments of FIGS. 2, 2A, 3, 4, 5, 5A, 5B, 6 and 7 consists at least of water, in particular white water or clear water, or of at least one pulp suspension, the concentration of which differs from the average concentration of distinguishes at least one in the headbox 1 flowing pulp suspension 2 (arrow).
  • the headbox 1 shown and described in each case in FIGS. 2, 2A, 3, 4, 5, 5A, 5B, 6 and 7 is particularly suitable for use in a machine for producing a fibrous web 3, in particular a paper or board web, from at least one pulp suspension 2 (arrow).
  • the features of the headbox 1 illustrated and described in FIGS. 2, 2A, 3, 4, 5, 5A, 5B, 6 and 7 may also be at least partially combined with one another by the person skilled in the art.
  • a headbox of the type mentioned is improved by the invention so that a technically simple and reliable dilution water system can be realized. Moreover, it allows a cost effective design and represents a cheaper retrofit solution with less downtime.
  • 17 means for preferably controllable rule metered addition of a fluid in fluid sub-streams

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Abstract

L'invention concerne une caisse de tête (1) pour une machine servant à fabriquer une bande de matière fibreuse (3), notamment une bande de papier, de carton ou de papier à usage sanitaire et domestique, à partir d'au moins une suspension de matière fibreuse (2), ladite caisse de tête comprenant : un dispositif d'amenée (4, 5) qui amène ladite au moins une suspension de matière fibreuse (2); une plaque perforée tubulaire de répartition (6), directement adjacente au dispositif d'amenée (4, 5) dans le sens d'écoulement (R) de ladite au moins une suspension de matière fibreuse (2) et présentant une pluralité de canaux d'écoulement (7) disposés en rangées (Z; Z.1 à Z.3) et en colonnes (S; S.1 à S.4); un canal intermédiaire (8) directement adjacent à la plaque perforée tubulaire de répartition (6) dans le sens d'écoulement (R) de ladite au moins une suspension de matière fibreuse (2), s'étendant dans le sens de la largeur (B) de la caisse de tête (1) et présentant deux parois (9.1, 9.2) de préférence de la largeur de la machine; un générateur de turbulence (10) directement adjacent au canal intermédiaire (8) dans le sens d'écoulement (R) de ladite au moins une suspension de matière fibreuse (2), comportant une pluralité de canaux d'écoulement (11) disposés en rangées (Z; Z.1 à Z.3) et en colonnes (S; S.1 à S.4); et une buse de caisse de tête (13) directement adjacente au générateur de turbulence (10) dans le sens d'écoulement (R) de ladite au moins une suspension de matière fibreuse (2) et présentant une fente (14), le dispositif d'amenée (4, 5), la plaque perforée tubulaire de répartition (6) et le canal intermédiaire (8) étant placés dans un premier plan d'alignement (AE.1) et le générateur de turbulence (10) et la buse de caisse de tête (13) étant placés dans un deuxième plan d'alignement (AE.2), les deux plans d'alignement (AE.1, AE.2) formant un angle (α) situé dans une plage > 90 et < 180°, de préférence ≥ 100 et ≤ 170°, en particulier ≥ 110 et ≤ 160°. La caisse de tête (1) selon l'invention est caractérisée en ce que : plusieurs moyens (17, 17.1) espacés dans le sens de la largeur (B) de la caisse de tête (1), servant à doser, de préférence de manière commandable/régulable, un fluide (18) sous la forme d'écoulements partiels de fluide (18.T) introduits dans ladite au moins une suspension de matière fibreuse (2), sont placés sur au moins une paroi (9.2), de préférence de la largeur de la machine, du canal intermédiaire (8); en ce que chaque moyen (17, 17.1) servant à doser, de préférence de manière commandable/régulable, le fluide (18) sous la forme d'écoulements partiels de fluide (18.T) introduits dans ladite au moins une suspension de matière fibreuse (2), comprend plusieurs canaux de dosage (19) présentant chacun une ouverture (19.1) et un axe central (19.M) et débouchant à différentes hauteurs; et en ce que chaque ouverture (19.1) d'un canal de dosage (19) du moyen (17, 17.1) servant à doser, de préférence de manière commandable/régulable, le fluide (18) sous la forme d'écoulements partiels de fluide (18.T) introduits dans ladite au moins une suspension de matière fibreuse (2), est orientée de sorte que l'axe central (19.M) de ce canal de dosage (19) frappe le générateur de turbulence (10) en un point d'impact (AP).
EP10718119A 2009-06-18 2010-04-23 Caisse de tête pour une machine servant à fabriquer une bande de matière fibreuse et machine Withdrawn EP2464782A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910027013 DE102009027013A1 (de) 2009-06-18 2009-06-18 Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn
PCT/EP2010/055406 WO2010145871A2 (fr) 2009-06-18 2010-04-23 Caisse de tête pour une machine servant à fabriquer une bande de matière fibreuse

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Publication number Priority date Publication date Assignee Title
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

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DE4119593A1 (de) 1991-06-14 1992-12-17 Herbert Hartmannshenn Feinsiebrechen
DE4140657C2 (de) * 1991-12-10 1994-07-14 Voith Gmbh J M Stoffauflauf
DE10245154A1 (de) * 2002-09-27 2004-04-15 Voith Paper Patent Gmbh Stoffauflauf
DE102008054898A1 (de) 2008-12-18 2010-06-24 Voith Patent Gmbh Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn

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* Cited by examiner, † Cited by third party
Title
See references of WO2010145871A2 *

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DE102009027013A1 (de) 2010-12-23
WO2010145871A3 (fr) 2012-06-28

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