EP2379800A1 - Headbox for a machine for producing a fibrous web - Google Patents

Headbox for a machine for producing a fibrous web

Info

Publication number
EP2379800A1
EP2379800A1 EP09740126A EP09740126A EP2379800A1 EP 2379800 A1 EP2379800 A1 EP 2379800A1 EP 09740126 A EP09740126 A EP 09740126A EP 09740126 A EP09740126 A EP 09740126A EP 2379800 A1 EP2379800 A1 EP 2379800A1
Authority
EP
European Patent Office
Prior art keywords
headbox
pressure loss
pulp suspension
channels
downstream
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
EP09740126A
Other languages
German (de)
French (fr)
Other versions
EP2379800B1 (en
Inventor
Wolfgang Ruf
Konstantin Fenkl
Markus Häußler
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 EP2379800A1 publication Critical patent/EP2379800A1/en
Application granted granted Critical
Publication of EP2379800B1 publication Critical patent/EP2379800B1/en
Active 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 Zudosierkanalö réelle and opening center line, which opens at different heights and connected to a common supply channel Zudosierkanäle includes, with a downstream ange arranged turbulence generating means having a plurality of flow channels arranged in rows and in columns, and with a headbox jet directly adjoining the turbulence generation means and having a nozzle gap.
  • Such a headbox is known, for example, from German Offenlegungs 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 fabric casserole for a paper machine with a feed device for the pulp suspension, having a plurality of channels having guide means, a lying upstream of a guide means mixing chamber with a plurality Distributed across the headbox feeding devices for a differing in its properties of the stock suspension zuzumischen- and having a guide device adjoining, an outlet gap for the stock suspension forming nozzle chamber.
  • the feed devices for the fluid to be admixed extend substantially perpendicularly in the mixing chamber and have a plurality of admixing openings located 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 published patent application DE 44 16 909 A1 shows a headbox for a paper machine with a supply device for the Stoffsus- pension, a downstream adjoining provided with a plurality of channels guide means, a downstream thereto, extending over the width of the headbox mixing chamber with a plurality of distributed across the headbox, extending substantially 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 this, an outlet gap for the stock suspension forming nozzle chamber.
  • the feed means for the admixing 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 flow direction as far as the second guide means.
  • the headboxes shown in these three documents may have unstable operating conditions, which are particularly reflected in the properties of the fibrous webs to be produced.
  • the negatively influenced properties may in particular be the basis weight and the fiber orientation in the fibrous web to be produced.
  • the consumption of chemicals, in particular retention agents can be high.
  • the pressure requirement of a headbox for the skilled person in a known manner for fluidization of the at least one pulp suspension used to equalize and align the flow and to accelerate the at least one pulp suspension in the headbox. The pressures needed for equalization or alignment and fluidization are losses.
  • the pressure loss should be as small as possible and optimally distributed to preferably uniform distribution of the Faserstoffsus- pension.
  • the energy consumption of the headbox should be noticeably reduced, the stability of the fiber orientation (transverse) profile improved, and the consumption of chemicals, especially retention aids, reduced.
  • a headbox of the type mentioned that he due to its design a System pressure loss, which is composed essentially of a first pressure loss between the supply device and the intermediate channel and a second pressure loss in the turbulence generating means, wherein the second pressure loss and the first pressure loss in a ratio in a range of 8: 1 to 1: 1, preferably from 4: 1 to 1: 1, especially from 2: 1 to 1: 1.
  • the inventive design of the headbox of the type mentioned provides a most extensive, preferably complete avoidance of the aforementioned disadvantages of the prior art and a significantly improved fulfillment of particular technological requirements.
  • the pressure loss for the distribution of the pulp suspension is as low as possible and optimally distributed, so that the continuous production of a high-quality fibrous web is made possible.
  • the energy consumption of the headbox is significantly reduced and a good to very good performance of the headbox with the described metering system is still adequately ensured even with a possibly larger change in operating conditions.
  • the stability of the fiber orientation (transverse) profile is improved and the consumption of chemicals, in particular retention agents is reduced.
  • the headbox of the head box according to the invention 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 second pressure loss in the intermediate channel is preferably in a range from 0.1 to 1.5 bar, preferably from 0.2 to 1.0 bar, in particular from 0.3 to 0.5 bar.
  • the feeder includes a transverse distribution tube attached to the distribution well plate, and the distribution well plate is provided with hydraulic elements for pressure recovery, such as diffusers, step fans, or the like.
  • This flow guidance allows an interference-free and clog-free inflow of the distribution well plate in the distribution pipe at a speed in the range of 4 to 16 m / s. This flow energy is converted back into pressure by the diffusers in the distribution well plate.
  • the delivery device comprises a central manifold having a plurality of hoses, the hoses of which are connected to the channels of the distribution well plate, and the plurality of
  • Hoses are provided with hydraulic elements for pressure recovery, such as diffusers, stepping fans or the like. At this
  • the system can be designed for small flow rates below 10 m / s in the hoses.
  • the at least one pulp suspension fed to the feeder device can be fed exclusively to the downstream adjoining channels of the distributor tube perforated plate.
  • a headbox without a recirculation of the pulp suspension can be realized and the amount of pulp suspension at the edge varies to a significant extent less.
  • the point of impact of the opening center line of the individual metering opening on the turbulence generating means may be approximately centrally, preferably centrally between the two column planes of two adjacent flow channels.
  • the metering channel opening of the means for preferably controllable metered addition of the fluid in partial fluid streams into the at least one pulp suspension to the turbulence generating means preferably has a vertical distance in the range of 1 to 100 mm, preferably from 3 to 50 mm, in particular from 5 to 30 mm , on. This distance ranges ensure the necessary mixing quality of the fluid with the pulp suspension, even with different operating parameters, so that the best conditions for the production of a fibrous web with good to very good quality characteristics are given.
  • 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- Geomet- rie ”) with the same filing date as the present patent application is described and shown, the disclosure of which 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 in the headbox.
  • 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.
  • a machine for producing a fibrous web in particular paper or board web.
  • the fibrous web produced according to the 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.
  • FIG. 1 shows a vertical and schematic longitudinal 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;
  • FIG. 2 shows a vertical and schematic longitudinal section of a second embodiment of a head box for a machine for producing a fibrous web from at least one pulp suspension according to the invention
  • Figure 3 is a vertical and schematic longitudinal sectional view of a Verteillochlochplatte the head box according to the invention for a machine for producing a fibrous web of at least one
  • FIG. 4 shows a schematic detail of the means for preferably controllable metered addition of the fluid in partial fluid streams.
  • the illustrated headbox 1 shows a vertical and schematic longitudinal sectional view of a headbox 1 for a machine for producing a fibrous web 3 from a pulp suspension 2 (arrow).
  • the illustrated headbox 1 can of course also be designed as a multilayer headbox, which uses at least two different pulp suspensions for producing 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 feeding the pulp suspension 2 (arrow) in the form of a transverse dividing pipe 5.1 known to the person skilled in the art.
  • 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.
  • the individual means 9 for preferably controllable metering comprises in each case a plurality of metering channels 11 which have a respective metering channel opening 11.0 and which open at different heights and are connected to a common supply channel 12 (see FIG.
  • the individual means 9 for preferably controllable metered addition is designed as a metering blade 9.1.
  • 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 in columns S.
  • the fiber stock suspension 2 (arrow) in the turbulence generating means 13 is divided into pulp feed partial streams and after the exit from the turbulence generating means in a machine-wide chamber 15 in the form of a design of a nozzle gap 17 having headbox nozzle 16 merged again to allow the formation of a machine-wide fibrous web 3.
  • the flow channels 14 are in a known manner preferably as thin-walled turbulence tubes and / or turbulence tube inserts with at least in sections formed constant, at least partially diverging, at least partially converging and / or discontinuous cross-sectional areas.
  • the headbox nozzle 16 at least one, well-known to those skilled and not explicitly shown separating elements, in particular a lamella 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.
  • the head box 1 has a system pressure loss, which essentially consists of a first pressure loss ⁇ p1 between the feed device 4 and the intermediate channel 8 and a second pressure loss ⁇ p2 in the turbulence generating means 13, wherein the second pressure loss ⁇ p2 and the first pressure loss ⁇ p1 in a ratio in a range from 8: 1 to 1: 1, preferably from 4: 1 to 1: 1, in particular from 2: 1 to 1: 1.
  • the second pressure drop ⁇ p2 in the turbulence generating means 13 is in a range of 0.1 to 1.5 bar, preferably 0.2 to 1.0 bar, more preferably 0.3 to 0.5 bar.
  • the distribution well plate 6 is provided with hydraulic elements 19 for pressure recovery, such as diffusers, stage diffusers or the like (see FIG. 3).
  • the pulp suspension 2 fed to the feed device 4 is supplied exclusively to the downstream channels 7 of the distribution well plate 6.
  • the headbox 1 thus has no recirculation for it by means of the feeder 4 supplied pulp suspension 2.
  • the impact point P of the opening center line 1 1 .M the individual Zudosieröff- tion 1 1 .0 of Zudosierkanals 1 1 on the turbulence generating means 13 is approximately centrally, preferably centrally between the two column planes of two adjacent flow channels 14 of the turbulence generating means 13.
  • Metering channels 1 1 of the metering device 9.1 designed as means 9 for preferably adjustable / controllable Zudosie- tion are arranged at equal intervals a and each connected to the common supply channel 12 Zudosierkanal 1 1 of the means 9 for preferably controlled / controllable metering has a circular Cross-sectional area 11 .Q with a diameter 11 .D from 2 to 10 mm, preferably from 4 to 6 mm, on.
  • the common supply channel 12 of the means 9 for preferably controllable metered addition has a circular cross-sectional area 12.Q with a diameter 12.D of 6 to 20 mm, preferably of 10 to 15 mm (see Figure 4).
  • 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 for preferably controllable metered addition have a preferably equal pitch T in the width direction of the headbox 1 in the range of 10 to 100 mm, preferably 25, 33, 50 or 66 mm.
  • the metering blade 9.1 is described and shown in the German patent application (applicant file number: HPA14265 DE and applicant working title: "MJ M-DoS-TE geometry") with the same filing date as the present patent application made this description.
  • the metering opening 11.0 of the means 9 for preferably controllable metered addition of the fluid 10 in partial fluid streams 10T (arrows) into the pulp suspension 2 to the turbulence generating means 13 has a vertical distance A in the range of 2 to 100 mm, preferably 3 up to 50 mm, in particular from 5 to 30 mm (see Figure 4).
  • FIG. 2 shows a vertical and schematic longitudinal sectional view of a second embodiment according to the invention of a headbox 1 for a machine for producing a fibrous web 3 from at least one fibrous stock suspension 2.
  • the basic structure of this headbox 1 substantially corresponds to the basic structure of the headbox shown schematically in Figure 1 1, so that reference is also made to this description of the figures.
  • the feed device 4 of this headbox 1 comprises a plurality of hoses 5.21 having central distributor 5.2, the tubes 5.21 are connected to the arranged in rows Z and in columns S channels 7 of Verteilrohrloch- plate 6.
  • the known to the expert central distributor 5.2 is commonly referred to as a round distributor.
  • the distribution well plate 6 is in turn provided with hydraulic elements 19 for pressure recovery, such as diffusers, stage endforsors or the like (see FIG.
  • the second pressure loss ⁇ p 2 in the turbulence generating means 13 is in a range of 0.1 to 1, 5 bar, preferably from 0.2 to 1, 0 bar, in particular from 0.3 to 0.5 bar.
  • 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.
  • FIG. 3 shows a vertical and schematic longitudinal sectional view of a distribution well plate 6 of the head box 1 according to the invention for a machine for producing a fibrous web from at least one pulp suspension with five channels 7 with different channel cross sections 7.Q.
  • the distribution well plate 6 has five rows Z1 to Z5 on channels 7 and a plurality of columns S on channels 7. All channels 7 have a consistently round channel cross section 7.Q, but in different shapes and configurations. Also, all channels 7 are provided on the inlet side with a respective intake chamfer 20 known to those skilled in the art.
  • the channels 7 of the two upper lines Z4, Z5 initially have a constant channel cross section 7.Q, which ultimately experiences a continuous extension 21, in particular a cone 21.1 with a cone angle ⁇ of ⁇ 30 °.
  • the channels 7 of the middle row Z3 initially again have a constant channel cross section 7.Q, which ultimately experiences two jump-like extensions 22, in particular step jumps 22.1, 22.2.
  • the channels 7 of the two lower rows Z1, Z2 initially again have a constant channel cross section 7.Q, which ultimately only experiences a sudden expansion 22, in particular a step jump 22.1.
  • Each individual channel 7 of the distribution well plate 6 thus has at least initially a round channel cross section 7.Q with a channel diameter 7.D and then forms a hydraulic element 19 for pressure recovery due to at least one extension 21, 22 from.
  • the mean channel diameter 7.DM of the channel 7 of the distribution well plate 6 and the length 6.L of the distribution well plate 6 are in a ratio of 1: 2 to 1:10, preferably 1: 3 to 1: 8, in particular 1: 4 to 1: 5.
  • FIG. 4 shows a schematic detail of the means 9 for preferably controllable metered addition of the fluid 10 into partial fluid streams 10.T (arrow).
  • the common supply channel 12 of the means 9 for preferably controllable metered addition has a circular cross-sectional area 12.Q with a diameter 12.D of 6 to 20 mm, preferably from 10 to 15 mm.
  • the impact point P of the opening center line 11 M of the individual metering opening 11.0 of the metering channel 11 on the turbulence generating means 13 is approximately centrally, preferably centrally between the two column planes of two adjacent flow channels 14 of the turbulence generating means thirteenth
  • the fluid 10 flowing through the respective headbox 1 of FIGS. 1 to 4 consists at least of water, in particular white water or clear water, or of at least one fibrous suspension whose concentration differs from the average concentration of the at least one fibrous suspension 2 flowing in the headbox 1.
  • 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 aforementioned disadvantages of the prior art as far as possible, preferably completely eliminated.
  • the pressure loss for preferably uniform distribution of the pulp suspension is distributed as low as possible and optimal.
  • the energy consumption of the headbox is significantly reduced, improves the stability of the fiber orientation (transverse) profile and reduces the consumption of chemicals, in particular retention agents.

Abstract

The invention relates to a headbox (1) which comprises a feed device (4, 5.1; 4, 5.2) feeding the at least one fiber suspension (2), a perforated distribution pipe plate (6) arranged immediately downstream thereof and having a plurality of channels (7) arranged in lines (Z) and columns (S), an intermediate channel (8) arranged downstream thereof, extending over the width (B) of the headbox (1) and having a plurality of means (9, 9.1) for dosing a fluid (10) in partial fluid streams (10.T) to the at least one fiber suspension (2) in a preferably adjustable/controlled manner, the means being spaced apart from each other in the width direction of the headbox (1) and the individual means (9; 9.1) comprising a plurality of dosing channels (11) having respective dosing channel openings (11.O) and an opening center line (11.M), arriving at different levels and being connected to a common supply channel (12). The headbox further comprises a downstream turbulence generator (13) having a plurality of flow channels (14) arranged in lines (Z) and columns (S) and a headbox nozzle (16) which is directly contiguous to the turbulence generator (13) and which has a nozzle gap (17). The headbox (1) according to the invention has a system pressure loss which is substantially composed of a first pressure loss (?p1) between the feed device (4, 5.1; 4, 5.2) and the intermediate channel (8) and a second pressure loss (?p2) in the turbulence generator (13), the second pressure loss (?p2) and the first pressure loss (?p1) being in a ratio ranging from 8:1 to 1:1, preferably from 4:1 to 1:1, particularly from 2:1 to 1:1.

Description

Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn Headbox for a machine for producing a fibrous web
Die Erfindung betrifft einen Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn, insbesondere Papier- oder Kartonbahn, aus wenigstens einer Faserstoffsuspension, mit einer die wenigstens eine Faserstoffsuspension zuführenden Zuführvorrichtung, mit einer sich stromabwärts anschließenden und eine Vielzahl von in Zeilen und in Spalten angeordneten Kanälen aufweisenden Verteilrohrlochplatte, mit einem stromabwärts dazu liegenden, sich über die Breite des Stoffauflaufs erstreckenden Zwischenkanal mit mehreren in Breitenrichtung des Stoffauflaufs zueinander beabstandeten Mitteln zur vorzugsweise regel- /steuerbaren Zudosierung von einem Fluid in Fluidteilströmen in die wenigstens eine Faserstoffsuspension, wobei das einzelne Mittel jeweils mehrere eine jewei- lige Zudosierkanalöffnung und Öffnungsmittellinie aufweisende, in unterschiedlichen Höhen mündende und mit einem gemeinsamen Versorgungskanal verbundene Zudosierkanäle umfasst, mit einem stromabwärts angeordneten Turbulenzerzeugungsmittel mit einer Vielzahl von in Zeilen und in Spalten angeordneten Strömungskanälen, und mit einer sich dem Turbulenzerzeugungsmittel unmittel- bar anschließenden und einen Düsenspalt aufweisenden Stoffauflaufdüse.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 Zudosierkanalöffnung and opening center line, which opens at different heights and connected to a common supply channel Zudosierkanäle includes, with a downstream ange arranged turbulence generating means having a plurality of flow channels arranged in rows and in columns, and with a headbox jet directly adjoining the turbulence generation means and having a nozzle gap.
Ein derartiger Stoffauflauf ist beispielsweise aus den deutschen Offenlegungs- schriften DE 44 16 898 A1 , DE 44 16 899 A1 und DE 44 16 909 A1 bekannt.Such a headbox is known, for example, from German Offenlegungs DE 44 16 898 A1, DE 44 16 899 A1 and DE 44 16 909 A1.
Die deutsche Offenlegungsschrift DE 44 16 898 A1 zeigt einen Stoff auflauf für eine Papiermaschine mit einer Zuführungseinrichtung für die Stoffsuspension, mit einer eine Vielzahl von Kanälen aufweisenden Führungseinrichtung, einer stromaufwärts zu einer Führungseinrichtung liegenden Mischkammer mit mehreren quer über den Stoffauflauf verteilten Zuführungseinrichtungen für ein sich in seinen Eigenschaften von der Stoffsuspension unterscheidendes zuzumischen- des Fluid und mit einem sich der Führungseinrichtung anschließenden, einen Austrittsspalt für die Stoffsuspension bildenden Düsenraum. Die Zuführungsein- richtungen für das zuzumischende Fluid erstrecken sich in der Mischkammer im Wesentlichen senkrecht und weisen mehrere übereinander liegende Zumischöff- nungen auf.The German patent application DE 44 16 898 A1 shows a fabric casserole for a paper machine with a feed device for the pulp suspension, having a plurality of channels having guide means, a lying upstream of a guide means mixing chamber with a plurality Distributed across the headbox feeding devices for a differing in its properties of the stock suspension zuzumischen- and having a guide device adjoining, an outlet gap for the stock suspension forming nozzle chamber. The feed devices for the fluid to be admixed extend substantially perpendicularly in the mixing chamber and have a plurality of admixing openings located one above the other.
Und die deutsche Offenlegungsschrift DE 44 16 899 A1 zeigt einen Stoffauflauf für eine Papiermaschine mit einer Zuführungseinrichtung für die Stoffsuspension, einer ersten eine Vielzahl von Kanälen aufweisenden Führungseinrichtung, einer zweiten eine Vielzahl von Kanälen aufweisenden Führungseinrichtung, einer dazwischen liegenden Mischkammer, einem sich anschließenden, einen Austrittsspalt für die Stoffsuspension bildenden Düsenraum und mehreren quer über den Stoffauflauf verteilten Zuführungsleitungen für das zuzumischende Fluid, wobei die überwiegende Anzahl der Kanäle der Führungseinrichtungen so positioniert und dimensioniert sind, dass die Austrittsöffnung aus der stromaufwärtigen Führungseinrichtung nicht mit einer Einmündung in die stromabwärts liegende Führungseinrichtung fluchtet. Die Zuführungsleitungen für das zuzumischende Fluid weisen Zumischöffnungen auf, die zum überwiegenden Teil jeweils mit einer Einmündung in die stromabwärts liegende Führungseinrichtung fluchten.And the 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.
Weiterhin zeigt die deutsche Offenlegungsschrift DE 44 16 909 A1 einen Stoffauflauf für eine Papiermaschine mit einer Zuführungseinrichtung für die Stoffsus- pension, einer sich stromabwärts anschließenden mit einer Vielzahl von Kanälen versehene Führungseinrichtung, einer stromabwärts dazu liegenden, sich über die Breite des Stoffauflaufes erstreckenden Mischkammer mit mehreren quer über den Stoffauflauf verteilten, sich im wesentlichen in Strömungsrichtung erstreckenden Trennwänden sowie quer über den Stoffauflauf verteilten Zuführungseinrich- tungen für ein zuzumischendes Fluid mit Zumischöffnungen, stromabwärts einer weiteren, eine Vielzahl von Kanälen aufweisenden Führungseinrichtung und einem sich dieser anschließenden, einen Austrittsspalt für die Stoffsuspension bildenden Düsenraum. Die Zuführungseinrichtungen für das zuzumischende Fluid erstrecken sich in die Mischkammer hinein und der durch die Trennwände gebildete Sektionalbereich in der Mischkammer beginnt im Bereich der Zumischöff- nungen, von wo er sich im wesentlichen in Strömungsrichtung bis zur zweiten Führungseinrichtung hin erstreckt.Furthermore, the German published patent application DE 44 16 909 A1 shows a headbox for a paper machine with a supply device for the Stoffsus- pension, a downstream adjoining provided with a plurality of channels guide means, a downstream thereto, extending over the width of the headbox mixing chamber with a plurality of distributed across the headbox, extending substantially in the flow direction partitions and distributed across the headbox Zuführseinrich- tions for a zuzumischendes fluid with Zumischöffnungen, downstream of another, a plurality of channels having guide means and a subsequent this, an outlet gap for the stock suspension forming nozzle chamber. The feed means for the admixing 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 flow direction as far as the second guide means.
Die in diesen drei Dokumenten gezeigten Stoffaufläufe weisen aufgrund ihrer Betriebsbedingungen möglicherweise instabile Betriebsverhältnisse auf, die speziel l in den Eigenschaften der herzustellenden Faserstoffbahnen ihren Niederschlag finden. Die negativ beeinflussten Eigenschaften können insbesondere das Flächengewicht und die Faserorientierung in der herzustellenden Faserstoffbahn sein. Außerdem kann der Verbrauch an Chemikalien, insbesondere Retentionsmittel hoch sein. Auch wird der Druckbedarf eines Stoffauflaufs für den Fachmann in bekannter Weise zur Fluidisierung der wenigstens einen Faserstoffsuspension, zur Vergleichmäßigung und Ausrichtung der Strömung und zur Beschleunigung der wenigstens einen Faserstoffsuspension in der Stoffauflaufdüse verwendet. Die zur Vergleichmäßigung bzw. Ausrichtung und Fluidisierung benötigten Drücke sind Verluste.Due to their operating conditions, the headboxes shown in these three documents may have unstable operating conditions, which are particularly reflected in the properties of the fibrous webs to be produced. The negatively influenced properties may in particular be the basis weight and the fiber orientation in the fibrous web to be produced. In addition, the consumption of chemicals, in particular retention agents can be high. Also, the pressure requirement of a headbox for the skilled person in a known manner for fluidization of the at least one pulp suspension used to equalize and align the flow and to accelerate the at least one pulp suspension in the headbox. The pressures needed for equalization or alignment and fluidization are losses.
Es ist also Aufgabe der Erfindung, einen Stoffauflauf der eingangs genannten Art derart zu verbessern, dass die zuvor erwähnten Nachteile des Stands der Technik weitestgehend, vorzugsweise vollständig beseitigt werden. Dabei soll der Druckverlust zur vorzugsweise möglichst gleichmäßigen Verteilung der Faserstoffsus- pension möglichst gering und optimal verteilt sein . Auch soll der Energieverbrauch des Stoffauflaufs merklich reduziert, die Stabilität des Faserorientie- rungs(quer)profils verbessert und der Verbrauch an Chemikalien, insbesondere Retentionsmittel reduziert werden.It is therefore an object of the invention to improve a headbox of the type mentioned in such a way that the aforementioned disadvantages of the prior art as far as possible, preferably completely eliminated. In this case, the pressure loss should be as small as possible and optimally distributed to preferably uniform distribution of the Faserstoffsus- pension. In addition, the energy consumption of the headbox should be noticeably reduced, the stability of the fiber orientation (transverse) profile improved, and the consumption of chemicals, especially retention aids, reduced.
Diese Aufgabe wird bei einem Stoffauflauf der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass er aufgrund seiner Ausgestaltung einen Systemdruckverlust aufweist, der sich im Wesentlichen aus einem ersten Druckverlust zwischen der Zuführvorrichtung und dem Zwischenkanal und einem zweiten Druckverlust in dem Turbulenzerzeugungsmittel zusammensetzt, wobei der zweite Druckverlust und der erste Druckverlust in einem Verhältnis in einem Bereich von 8:1 bis 1 :1 , vorzugsweise von 4:1 bis 1 :1 , insbesondere von 2:1 bis 1 :1 , liegen.This object is achieved according to the invention in a headbox of the type mentioned, that he due to its design a System pressure loss, which is composed essentially of a first pressure loss between the supply device and the intermediate channel and a second pressure loss in the turbulence generating means, wherein the second pressure loss and the first pressure loss in a ratio in a range of 8: 1 to 1: 1, preferably from 4: 1 to 1: 1, especially from 2: 1 to 1: 1.
Die erfindungsgemäße Aufgabe wird auf diese Weise vollkommen gelöst.The object of the invention is completely solved in this way.
Die erfindungsgemäße Ausgestaltung des Stoffauflaufs der eingangs genannten Art erbringt eine weitestgehende, vorzugsweise vollständige Vermeidung der zuvor erwähnten Nachteile des Stands der Technik und eine wesentlich verbesserte Erfüllung der insbesondere technologischen Anforderungen. So ist insbesondere der Druckverlust zur Verteilung der Faserstoffsuspension möglichst gering und optimal verteilt, so dass die fortwährende Herstellung einer qualitativ hochwertigen Faserstoffbahn ermöglicht wird. Zudem wird auch der Energieverbrauch des Stoffauflaufs merklich reduziert und eine gute bis sehr gute Funktionserfüllung des Stoffauflaufs mit dem beschriebenen Dosiersystem ist selbst bei einer gegebenenfalls größeren Änderung der Betriebsbedingungen noch ausrei- chend sichergestellt. Und die Stabilität des Faserorientierungs(quer)profils wird verbessert und der Verbrauch an Chemikalien, insbesondere Retentionsmittel wird reduziert.The inventive design of the headbox of the type mentioned provides a most extensive, preferably complete avoidance of the aforementioned disadvantages of the prior art and a significantly improved fulfillment of particular technological requirements. In particular, the pressure loss for the distribution of the pulp suspension is as low as possible and optimally distributed, so that the continuous production of a high-quality fibrous web is made possible. In addition, the energy consumption of the headbox is significantly reduced and a good to very good performance of the headbox with the described metering system is still adequately ensured even with a possibly larger change in operating conditions. And the stability of the fiber orientation (transverse) profile is improved and the consumption of chemicals, in particular retention agents is reduced.
Auch kann in der Stoffauflaufdüse des erfindungsgemäßen Stoffauflaufs wenigstens ein, dem Fachmann wohl bekanntes Trennelement, insbesondere eine Lamelle angeordnet sein. Sollten mehrere Trennelemente, insbesondere Lamellen in der Stoffauflaufdüse des erfindungsgemäßen Stoffauflaufs angeordnet sein, so können sie unterschiedliche Längen und gegebenenfalls auch unterschiedliche Eigenschaften, wie Oberflächenkonturen und dergleichen, aufweisen. Der zweite Druckverlust in dem Zwischenkanal liegt bevorzugt in einem Bereich von 0,1 bis 1 ,5 bar, vorzugsweise von 0,2 bis 1 ,0 bar, insbesondere von 0,3 bis 0,5 bar.Also, in the headbox of the head box according to the invention 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 second pressure loss in the intermediate channel is preferably in a range from 0.1 to 1.5 bar, preferably from 0.2 to 1.0 bar, in particular from 0.3 to 0.5 bar.
In einer weiteren Ausführungsform umfasst die Zuführvorrichtung ein an die Verteilrohrlochplatte angebrachtes Querverteilrohr und die Verteilrohrlochplatte ist mit hydraulischen Elementen zur Druckrückgewinnung, wie beispielsweise Diffusoren, Stufend iffusoren oder ähnlichem, versehen. Diese Strömungsführung erlaubt eine störungs- und verstopfungsfreie Einströmung der Verteilrohrloch- platte im Verteilrohr bei einer Geschwindigkeit im Bereich von 4 bis 16 m/s. Diese Strömungsenergie wird durch die Diffusoren in der Verteilrohrlochplatte wieder in Druck umgewandelt.In another embodiment, the feeder includes a transverse distribution tube attached to the distribution well plate, and the distribution well plate is provided with hydraulic elements for pressure recovery, such as diffusers, step fans, or the like. This flow guidance allows an interference-free and clog-free inflow of the distribution well plate in the distribution pipe at a speed in the range of 4 to 16 m / s. This flow energy is converted back into pressure by the diffusers in the distribution well plate.
In einer alternativen Ausführungsform umfasst die Zuführvorrichtung einen eine Vielzahl von Schläuchen aufweisenden Zentralverteiler, dessen Schläuche mit den Kanälen der Verteilrohrlochplatte verbunden sind, und die Vielzahl vonIn an alternative embodiment, the delivery device comprises a central manifold having a plurality of hoses, the hoses of which are connected to the channels of the distribution well plate, and the plurality of
Schläuchen ist mit hydraulischen Elementen zur Druckrückgewinnung, wie beispielsweise Diffusoren, Stufend iffusoren oder ähnlichem, versehen. Bei dieserHoses are provided with hydraulic elements for pressure recovery, such as diffusers, stepping fans or the like. At this
Zulaufausführung kann das System für kleine Strömungsgeschwindigkeiten unter 10 m/s in den Schläuchen ausgelegt werden.Inlet design, the system can be designed for small flow rates below 10 m / s in the hoses.
Auch kann die wenigstens eine der Zuführvorrichtung zugeführte Faserstoffsuspension ausschließlich den sich stromabwärts anschließenden Kanälen der Verteilrohrlochplatte zugeführt sein. Damit kann ein Stoffauflauf ohne eine Rezir- kulation der Faserstoffsuspension realisiert werden und die Menge an Faserstoffsuspension am Rand variiert in einem wesentlichen Maße weniger stark.Also, the at least one pulp suspension fed to the feeder device can be fed exclusively to the downstream adjoining channels of the distributor tube perforated plate. Thus, a headbox without a recirculation of the pulp suspension can be realized and the amount of pulp suspension at the edge varies to a significant extent less.
Und der Auftreffpunkt der Öffnungsmittellinie der einzelnen Zudosieröffnung auf das Turbulenzerzeugungsmittel kann annähernd mittig, vorzugsweise mittig zwischen den beiden Spaltenebenen zweier benachbarter Strömungskanäle liegen. Mit dieser Ausführungsform kann die Durchsatzkonstanz an Fluid in Brei- tenrichtung des Stoffauflaufs in dem Turbulenzerzeugungsmittel unabhängig von der in Breitenrichtung des Stoffauflaufs unterschiedlich dosierbaren Menge an Faserstoffsuspension gemacht werden.And the point of impact of the opening center line of the individual metering opening on the turbulence generating means may be approximately centrally, preferably centrally between the two column planes of two adjacent flow channels. With this embodiment, the throughput constancy of fluid in wide direction of the headbox in the turbulence generating means are made regardless of the width in the headbox differently metered amount of pulp suspension.
Ferner weist die Zudosierkanalöffnung des Mittels zur vorzugsweise regel- /steuerbaren Zudosierung des Fluids in Fluidteilströmen in die wenigstens eine Faserstoffsuspension zu dem Turbulenzerzeugungsmittel bevorzugt einen senkrechten Abstand im Bereich von 1 bis 100 mm, vorzugsweise von 3 bis 50 mm, insbesondere von 5 bis 30 mm, auf. Diese Abstandsbereiche gewährleisten auch bei unterschiedlichen Betriebsparametern die notwendige Vermischungsqualität des Fluids mit der Faserstoffsuspension, so dass beste Voraussetzungen für die Herstellung einer Faserstoffbahn mit guten bis sehr guten Qualitätsmerkmalen gegeben sind.Furthermore, the metering channel opening of the means for preferably controllable metered addition of the fluid in partial fluid streams into the at least one pulp suspension to the turbulence generating means preferably has a vertical distance in the range of 1 to 100 mm, preferably from 3 to 50 mm, in particular from 5 to 30 mm , on. This distance ranges ensure the necessary mixing quality of the fluid with the pulp suspension, even with different operating parameters, so that the best conditions for the production of a fibrous web with good to very good quality characteristics are given.
Das jeweilige Mittel zur vorzugsweise regel-/steuerbaren Zudosierung des Fluids in Fluidteilströmen in die wenigstens eine Faserstoffsuspension umfasst bevorzugt ein Dosierschwert, wie es in der deutschen Patentanmeldung (Anmelder- Aktenzeichen: HPA14265 DE und Anmelder-Arbeitstitel: „MJ M-DoS-TE-Geomet- rie") mit gleichem Anmeldetag wie die vorliegende Patentanmeldung beschrieben und gezeigt ist. Der diesbezügliche Offenbarungsgehalt wird hiermit zum Gegenstand der vorliegenden Beschreibung gemacht.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- Geomet- rie ") with the same filing date as the present patent application is described and shown, the disclosure of which is hereby made the subject of the present description.
Das Fluid besteht vorzugsweise aus Wasser, insbesondere Klarwasser, oder aus einer Faserstoffsuspension, insbesondere Siebwasser, deren Konzentration sich von der durchschnittlichen Konzentration der mindestens einen Faserstoffsuspension in dem Stoffauflauf unterscheidet. Diese Fluidarten haben sich in ähnlichen Anwendungen bereits bestens bewährt.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 in the headbox. These types of fluids have already proven themselves in similar applications.
Der erfindungsgemäße Stoffauflauf eignet sich in hervorragender Weise zur Verwendung in einer Maschine zur Herstellung einer Faserstoffbahn, insbesondere Papier- oder Kartonbahn. Die in der Maschine mit wenigstens einem erfin- dungsgemäßen Stoffauflauf hergestellte Faserstoffbahn weist durchwegs hervorragende Eigenschaften auf, da unter anderem die Regelung sowohl ihres Faser- orientierungsquerprofils als auch ihres Flächengewichtsquerprofils möglich ist.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. Those in the machine with at least one invented The fibrous web produced according to the 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.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung mehrerer bevorzugter Ausführungsbeispiele unter Bezugnahme auf die Zeichnung.Further features and advantages of the invention will become apparent from the following description of several preferred embodiments with reference to the drawings.
Es zeigen Figur 1 eine vertikale und schematische Längsschnittdarstellung einer ersten erfindungsgemäßen Ausführungsform eines Stoffauflaufs für eine Maschine zur Herstellung einer Faserstoffbahn aus wenigstens einer Faserstoffsuspension;1 shows a vertical and schematic longitudinal 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;
Figur 2 eine vertikale und schematische Längsschnittdarstellung einer zwei- ten erfindungsgemäßen Ausführungsform eines Stoffauflaufs für eine Maschine zur Herstellung einer Faserstoffbahn aus wenigstens einer Faserstoffsuspension;FIG. 2 shows a vertical and schematic longitudinal section of a second embodiment of a head box for a machine for producing a fibrous web from at least one pulp suspension according to the invention;
Figur 3 eine vertikale und schematische Längsschnittdarstellung einer Verteilrohrlochplatte des erfindungsgemäßen Stoffauflaufs für eine Maschine zur Herstellung einer Faserstoffbahn aus wenigstens einerFigure 3 is a vertical and schematic longitudinal sectional view of a Verteillochlochplatte the head box according to the invention for a machine for producing a fibrous web of at least one
Faserstoffsuspension mit unterschiedlichen Kanalquerschnitten; und Figur 4 eine schematische Detaildarstellung des Mittels zur vorzugsweise regel-/steuerbaren Zudosierung von dem Fluid in Fluidteilströmen.Pulp suspension with different channel cross sections; and FIG. 4 shows a schematic detail of the means for preferably controllable metered addition of the fluid in partial fluid streams.
Die Figur 1 zeigt eine vertikale und schematische Längsschnittdarstellung eines Stoffauflaufs 1 für eine Maschine zur Herstellung einer Faserstoffbahn 3 aus einer Faserstoffsuspension 2 (Pfeil). Der dargestellte Stoffauflauf 1 kann selbstverständlich auch als ein Mehrschichtenstoffauflauf ausgebildet sein, der zumindest zwei unterschiedliche Faserstoffsuspensionen zur Herstellung der Faserstoffbahn 3 verwendet. Die Faserstoffbahn 3 kann dabei insbesondere eine Papier-, Kartonoder Tissuebahn sein. Der Stoffauflauf 1 weist eine die eine Faserstoffsuspension 2 (Pfeil) zuführende Zuführvorrichtung 4 in Ausgestaltung eines dem Fachmann bekannten Querverteilrohrs 5.1 auf.1 shows a vertical and schematic longitudinal sectional view of a headbox 1 for a machine for producing a fibrous web 3 from a pulp suspension 2 (arrow). The illustrated headbox 1 can of course also be designed as a multilayer headbox, which uses at least two different pulp suspensions for producing 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 feeding the pulp suspension 2 (arrow) in the form of a transverse dividing pipe 5.1 known to the person skilled in the art.
Der Zuführvorrichtung 4 schließt sich stromabwärts eine Verteilrohrlochplatte 6 an, die eine Vielzahl von in Zeilen Z und in Spalten S angeordneten Kanälen 7 aufweist.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.
Wiederum stromabwärts zur Verteilrohrlochplatte 6 schließt sich ein über die Breite B (Pfeil) des Stoffauflaufs 1 erstreckender Zwischenkanal 8 an, der mit mehreren in Breitenrichtung des Stoffauflaufs 1 zueinander beabstandeten Mitteln 9 zur vorzugsweise regel-/steuerbaren Zudosierung von einem Fluid 10 (Pfeil) in Fluidteilströmen 10.T (Pfeile) in die Faserstoffsuspension 2 (Pfeil) versehen ist. Das einzelne Mittel 9 zur vorzugsweise regel-/steuerbaren Zudosierung umfasst jeweils mehrere eine jeweilige Zudosierkanalöffnung 11.0 aufweisende, in unterschiedlichen Höhen mündende und mit einem gemeinsamen Versorgungskanal 12 verbundene Zudosierkanäle 1 1 (vgl . Figur 4). Das einzelne Mittel 9 zur vorzugsweise regel-/steuerbaren Zudosierung ist als ein Dosierschwert 9.1 ausgebildet.Again downstream of the distribution well plate 6 is followed by an across the width B (arrow) of the headbox 1 extending intermediate channel 8, with a plurality of spaced in the width direction of the headbox 1 means 9 for preferably adjustable / controllable metering of a fluid 10 (arrow) in Partial 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 metering channels 11 which have a respective metering channel opening 11.0 and which open at different heights and are connected to a common supply channel 12 (see FIG. The individual means 9 for preferably controllable metered addition is designed as a metering blade 9.1.
Dem Zwischenkanal 8 stromabwärts nachgeordnet ist ein Turbulenzerzeugungsmittel 13 mit einer Vielzahl von in Zeilen Z und in Spalten S angeordneten Strömungskanälen 14. Während des Betriebs des Stoffauflaufs 1 wird die Faser- Stoffsuspension 2 (Pfeil) in dem Turbulenzerzeugungsmittel 13 in Faserstoffsus- pensionsteilströme aufgeteilt und nach dem Austritt aus dem Turbulenzerzeugungsmittel in einer maschinenbreiten Kammer 15 in Ausgestaltung einer einen Düsenspalt 17 aufweisenden Stoffauflaufdüse 16 wieder zusammengeführt, um die Bildung einer maschinenbreiten Faserstoffbahn 3 zu ermöglichen. Die Strömungskanäle 14 sind in bekannter Weise vorzugsweise als dünnwandige Turbulenzrohre und/oder Turbulenzrohrinserts mit zumindest streckenweise konstanten, zumindest streckenweise divergierenden, zumindest streckenweise konvergierenden und/oder sprunghaften Querschnittsflächen ausgebildet. Auch kann in der Stoffauflaufdüse 16 wenigstens ein, dem Fachmann wohl bekanntes und nicht explizit dargestelltes Trennelemente, insbesondere eine Lamelle ange- ordnet sein. Sollten mehrere Trennelemente, insbesondere Lamellen in der Stoffauflaufdüse 16 angeordnet sein, so können sie unterschiedliche Längen und gegebenenfalls auch unterschiedliche Eigenschaften, wie Oberflächenkonturen und dergleichen, aufweisen.Downstream of the intermediate channel 8 is a turbulence generating means 13 having a plurality of flow channels 14 arranged in rows Z and in columns S. During operation of the headbox 1, the fiber stock suspension 2 (arrow) in the turbulence generating means 13 is divided into pulp feed partial streams and after the exit from the turbulence generating means in a machine-wide chamber 15 in the form of a design of a nozzle gap 17 having headbox nozzle 16 merged again to allow the formation of a machine-wide fibrous web 3. The flow channels 14 are in a known manner preferably as thin-walled turbulence tubes and / or turbulence tube inserts with at least in sections formed constant, at least partially diverging, at least partially converging and / or discontinuous cross-sectional areas. Also, in the headbox nozzle 16 at least one, well-known to those skilled and not explicitly shown separating elements, in particular a lamella 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.
Die Stoffauflaufdüse 16 kann auslaufseitig zumindest einseitig mit einer gestrichelt angedeuteten Blende 18 versehen sein.The headbox 16 may be provided on the outlet side at least one side with a dashed line indicated aperture 18.
Der Stoffauflauf 1 weist aufgrund seiner Ausgestaltung einen Systemdruckverlust auf, der sich im Wesentlichen aus einem ersten Druckverlust Δp1 zwischen der Zuführvorrichtung 4 und dem Zwischenkanal 8 und einem zweiten Druckverlust Δp2 in dem Turbulenzerzeugungsmittel 13 zusammensetzt, wobei der zweite Druckverlust Δp2 und der erste Druckverlust Δp1 in einem Verhältnis in einem Bereich von 8:1 bis 1 :1 , vorzugsweise von 4:1 bis 1 :1 , insbesondere von 2:1 bis 1 :1 , liegen. Der zweite Druckverlust Δp2 in dem Turbulenzerzeugungsmittel 13 liegt in einem Bereich von 0,1 bis 1 ,5 bar, vorzugsweise von 0,2 bis 1 ,0 bar, insbesondere von 0,3 bis 0,5 bar.Due to its design, the head box 1 has a system pressure loss, which essentially consists of a first pressure loss Δp1 between the feed device 4 and the intermediate channel 8 and a second pressure loss Δp2 in the turbulence generating means 13, wherein the second pressure loss Δp2 and the first pressure loss Δp1 in a ratio in a range from 8: 1 to 1: 1, preferably from 4: 1 to 1: 1, in particular from 2: 1 to 1: 1. The second pressure drop Δp2 in the turbulence generating means 13 is in a range of 0.1 to 1.5 bar, preferably 0.2 to 1.0 bar, more preferably 0.3 to 0.5 bar.
Die Verteilrohrlochplatte 6 ist mit hydraulischen Elementen 19 zur Druckrückgewinnung, wie beispielsweise Diffusoren, Stufendiffusoren oder ähnlichem, verse- hen (vgl. Figur 3).The distribution well plate 6 is provided with hydraulic elements 19 for pressure recovery, such as diffusers, stage diffusers or the like (see FIG. 3).
Weiterhin ist die der Zuführvorrichtung 4 zugeführte Faserstoffsuspension 2 ausschließlich den sich stromabwärts anschließenden Kanälen 7 der Verteilrohrlochplatte 6 zugeführt. Der Stoffauflauf 1 weist somit keine Rezirkulation für die ihm mittels der Zuführvorrichtung 4 zugeführte Faserstoffsuspension 2 auf. Und der Auftreffpunkt P der Öffnungsmittellinie 1 1 .M der einzelnen Zudosieröff- nung 1 1 .0 des Zudosierkanals 1 1 auf das Turbulenzerzeugungsmittel 13 liegt annähernd mittig, vorzugsweise mittig zwischen den beiden Spaltenebenen zweier benachbarter Strömungskanäle 14 des Turbulenzerzeugungsmittels 13. Die in unterschiedlicher Höhe mündenden Zudosierkanäle 1 1 des als Dosierschwert 9.1 ausgebildeten Mittels 9 zur vorzugsweise regel-/steuerbaren Zudosie- rung sind in gleichen Abständen a angeordnet und der jeweils mit dem gemeinsamen Versorgungskanal 12 verbundene Zudosierkanal 1 1 des Mittels 9 zur vorzugsweise regel-/steuerbaren Zudosierung weist eine kreisrunde Querschnitt- fläche 11 .Q mit einem Durchmesser 11 .D von 2 bis 10 mm, vorzugsweise von 4 bis 6 mm, auf. Der gemeinsame Versorgungskanal 12 des Mittels 9 zur vorzugsweise regel-/steuerbaren Zudosierung hingegen weist eine kreisrunde Querschnittfläche 12.Q mit einem Durchmesser 12.D von 6 bis 20 mm, vorzugsweise von 10 bis 15 mm, auf (vgl. Figur 4).Furthermore, the pulp suspension 2 fed to the feed device 4 is supplied exclusively to the downstream channels 7 of the distribution well plate 6. The headbox 1 thus has no recirculation for it by means of the feeder 4 supplied pulp suspension 2. And the impact point P of the opening center line 1 1 .M the individual Zudosieröff- tion 1 1 .0 of Zudosierkanals 1 1 on the turbulence generating means 13 is approximately centrally, preferably centrally between the two column planes of two adjacent flow channels 14 of the turbulence generating means 13. The opening at different heights Metering channels 1 1 of the metering device 9.1 designed as means 9 for preferably adjustable / controllable Zudosie- tion are arranged at equal intervals a and each connected to the common supply channel 12 Zudosierkanal 1 1 of the means 9 for preferably controlled / controllable metering has a circular Cross-sectional area 11 .Q with a diameter 11 .D from 2 to 10 mm, preferably from 4 to 6 mm, on. The common supply channel 12 of the means 9 for preferably controllable metered addition, however, has a circular cross-sectional area 12.Q with a diameter 12.D of 6 to 20 mm, preferably of 10 to 15 mm (see Figure 4).
Das als Dosierschwert 9.1 ausgebildete Mittel 9 zur vorzugsweise regel- /steuerbaren Zudosierung weist eine Länge 9.L im Bereich von 60 bis 350 mm, vorzugsweise von 100 bis 250 mm, und in Abhängigkeit von der Höhe der Zwischenkammer des Stoffauflaufs 1 eine Höhe 9.H im Bereich von 50 bis 300 mm, vorzugsweise von 75 bis 250 mm, auf. Die Mittel 9 zur vorzugsweise regel- /steuerbaren Zudosierung weisen eine vorzugsweise gleiche Teilung T in Breitenrichtung des Stoffauflaufs 1 im Bereich von 10 bis 100 mm, vorzugsweise von 25, 33, 50 oder 66 mm, auf.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 for preferably controllable metered addition have a preferably equal pitch T in the width direction of the headbox 1 in the range of 10 to 100 mm, preferably 25, 33, 50 or 66 mm.
Das Dosierschwert 9.1 ist in der deutschen Patentanmeldung (Anmelder-Aktenzeichen: HPA14265 DE und Anmelder-Arbeitstitel: „MJ M-DoS-TE-Geometrie") mit gleichem Anmeldetag wie die vorliegende Patentanmeldung beschrieben und gezeigt. Der diesbezügliche Offenbarungsgehalt wird hiermit zum Gegenstand der vorliegenden Beschreibung gemacht. Überdies weist die Zudosieröffnung 11.0 des Mittels 9 zur vorzugsweise regel- /steuerbaren Zudosierung von dem Fluid 10 in Fluidteilströmen 10.T (Pfeile) in die Faserstoffsuspension 2 zu dem Turbulenzerzeugungsmittel 13 einen senkrechten Abstand A im Bereich von 2 bis 100 mm, vorzugsweise von 3 bis 50 mm, insbe- sondere von 5 bis 30 mm, auf (vgl. Figur 4).The metering blade 9.1 is described and shown in the German patent application (applicant file number: HPA14265 DE and applicant working title: "MJ M-DoS-TE geometry") with the same filing date as the present patent application made this description. Moreover, the metering opening 11.0 of the means 9 for preferably controllable metered addition of the fluid 10 in partial fluid streams 10T (arrows) into the pulp suspension 2 to the turbulence generating means 13 has a vertical distance A in the range of 2 to 100 mm, preferably 3 up to 50 mm, in particular from 5 to 30 mm (see Figure 4).
Die Figur 2 zeigt eine vertikale und schematische Längsschnittdarstellung einer zweiten erfindungsgemäßen Ausführungsform eines Stoffauflaufs 1 für eine Maschine zur Herstellung einer Faserstoffbahn 3 aus wenigstens einer Faser- Stoffsuspension 2. Der Grundaufbau dieses Stoffauflaufs 1 entspricht im Wesentlichen dem Grundaufbau des in der Figur 1 schematisch dargestellten Stoffauflaufs 1 , so dass auch auf diese Figurenbeschreibung verwiesen wird.2 shows a vertical and schematic longitudinal sectional view of a second embodiment according to the invention of a headbox 1 for a machine for producing a fibrous web 3 from at least one fibrous stock suspension 2. The basic structure of this headbox 1 substantially corresponds to the basic structure of the headbox shown schematically in Figure 1 1, so that reference is also made to this description of the figures.
Die Zuführvorrichtung 4 dieses Stoffauflaufs 1 umfasst einen eine Vielzahl von Schläuchen 5.21 aufweisenden Zentralverteiler 5.2, dessen Schläuche 5.21 mit den in Zeilen Z und in Spalten S angeordneten Kanälen 7 der Verteilrohrloch- platte 6 verbunden sind. Der dem Fachmann bekannte Zentralverteiler 5.2 wird gemeinhin auch als Rundverteiler bezeichnet.The feed device 4 of this headbox 1 comprises a plurality of hoses 5.21 having central distributor 5.2, the tubes 5.21 are connected to the arranged in rows Z and in columns S channels 7 of Verteilrohrloch- plate 6. The known to the expert central distributor 5.2 is commonly referred to as a round distributor.
Die Verteilrohrlochplatte 6 ist wiederum mit hydraulischen Elementen 19 zur Druckrückgewinnung, wie beispielsweise Diffusoren, Stufend iffusoren oder ähnlichem, versehen (vgl. Figur 3)The distribution well plate 6 is in turn provided with hydraulic elements 19 for pressure recovery, such as diffusers, stage endforsors or the like (see FIG.
Und auch dieser Stoffauflauf 1 weist aufgrund seiner Ausgestaltung einen Systemdruckverlust auf, der sich im Wesentlichen aus einem ersten DruckverlustAnd this headbox 1, due to its design, a system pressure loss, which essentially consists of a first pressure loss
Δp1 zwischen der Zuführvorrichtung 4 und dem Zwischenkanal 8 und einem zweiten Druckverlust Δp2 in dem Turbulenzerzeugungsmittel wobei der zweiteΔp1 between the feeder 4 and the intermediate passage 8 and a second pressure loss Δp2 in the turbulence generating means, the second one
Druckverlust Δp2 und der erste Druckverlust Δp1 in einem Verhältnis in einemPressure drop Δp2 and the first pressure loss Δp1 in a ratio in one
Bereich von 8:1 bis 1 :1 , vorzugsweise von 4:1 bis 1 :1 , insbesondere von 2:1 bis 1 :1 , liegen. Der zweite Druckverlust Δp2 in dem Turbulenzerzeugungsmittel 13 liegt in einem Bereich von 0,1 bis 1 ,5 bar, vorzugsweise von 0,2 bis 1 ,0 bar, insbesondere von 0,3 bis 0,5 bar.Range of 8: 1 to 1: 1, preferably from 4: 1 to 1: 1, in particular from 2: 1 to 1: 1, lie. The second pressure loss Δp 2 in the turbulence generating means 13 is in a range of 0.1 to 1, 5 bar, preferably from 0.2 to 1, 0 bar, in particular from 0.3 to 0.5 bar.
Auch kann in der Stoffauflaufdüse 16 wenigstens ein, dem Fachmann wohl bekanntes und nicht explizit dargestelltes Trennelemente, insbesondere eine Lamelle angeordnet sein. Sollten mehrere Trennelemente, insbesondere Lamellen in der Stoffauflaufdüse 16 angeordnet sein, so können sie unterschiedliche Längen und gegebenenfalls auch unterschiedliche Eigenschaften, wie Oberflächenkonturen und dergleichen, aufweisen.Also, in the headbox 16 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.
Die Figur 3 zeigt eine vertikale und schematische Längsschnittdarstellung einer Verteilrohrlochplatte 6 des erfindungsgemäßen Stoffauflaufs 1 für eine Maschine zur Herstellung einer Faserstoffbahn aus wenigstens einer Faserstoffsuspension mit fünf Kanälen 7 mit unterschiedlichen Kanalquerschnitten 7.Q.3 shows a vertical and schematic longitudinal sectional view of a distribution well plate 6 of the head box 1 according to the invention for a machine for producing a fibrous web from at least one pulp suspension with five channels 7 with different channel cross sections 7.Q.
Die Verteilrohrlochplatte 6 weist fünf Zeilen Z1 bis Z5 an Kanälen 7 und mehrere Spalten S an Kanälen 7 auf. Alle Kanäle 7 weisen einen durchwegs runden Kanalquerschnitt 7.Q auf, jedoch in verschiedenen Formen und Ausgestaltungen. Auch sind alle Kanäle 7 eintrittsseitig mit einer jeweiligen und dem Fachmann bekannten Einlauffase 20 versehen.The distribution well plate 6 has five rows Z1 to Z5 on channels 7 and a plurality of columns S on channels 7. All channels 7 have a consistently round channel cross section 7.Q, but in different shapes and configurations. Also, all channels 7 are provided on the inlet side with a respective intake chamfer 20 known to those skilled in the art.
Die Kanäle 7 der beiden oberen Zeilen Z4, Z5 weisen anfänglich einen konstanten Kanalquerschnitt 7.Q auf, der letztlich eine stetige Erweiterung 21 , insbesondere einen Konus 21.1 mit einem Konuswinkel α von < 30° erfährt.The channels 7 of the two upper lines Z4, Z5 initially have a constant channel cross section 7.Q, which ultimately experiences a continuous extension 21, in particular a cone 21.1 with a cone angle α of <30 °.
Die Kanäle 7 der mittleren Zeile Z3 weisen anfänglich wiederum einen konstanten Kanalquerschnitt 7.Q auf, der letztlich zwei sprungartige Erweiterungen 22, insbesondere Stufensprünge 22.1 , 22.2 erfährt. Die Kanäle 7 der beiden unteren Zeilen Z1 , Z2 weisen anfänglich erneut einen konstanten Kanalquerschnitt 7.Q auf, der letztlich nur eine sprungartige Erweiterung 22, insbesondere einen Stufensprung 22.1 erfährt.The channels 7 of the middle row Z3 initially again have a constant channel cross section 7.Q, which ultimately experiences two jump-like extensions 22, in particular step jumps 22.1, 22.2. The channels 7 of the two lower rows Z1, Z2 initially again have a constant channel cross section 7.Q, which ultimately only experiences a sudden expansion 22, in particular a step jump 22.1.
Jeder einzelne Kanal 7 der Verteilrohrlochplatte 6 weist also zumindest anfänglich einen runden Kanalquerschnitt 7.Q mit einem Kanaldurchmesser 7.D auf und bildet dann auch ein hydraulisches Element 19 zur Druckrückgewinnung aufgrund wenigstens einer Erweiterung 21 , 22 aus. Der mittlere Kanaldurchmesser 7.DM des Kanals 7 der Verteilrohrlochplatte 6 und die Länge 6.L der Verteilrohrloch- platte 6 liegen in einem Verhältnis von 1 :2 bis 1 :10, vorzugsweise von 1 :3 bis 1 :8, insbesondere von 1 :4 bis 1 :5.Each individual channel 7 of the distribution well plate 6 thus has at least initially a round channel cross section 7.Q with a channel diameter 7.D and then forms a hydraulic element 19 for pressure recovery due to at least one extension 21, 22 from. The mean channel diameter 7.DM of the channel 7 of the distribution well plate 6 and the length 6.L of the distribution well plate 6 are in a ratio of 1: 2 to 1:10, preferably 1: 3 to 1: 8, in particular 1: 4 to 1: 5.
Die Figur 4 zeigt eine schematische Detaildarstellung des Mittels 9 zur vorzugsweise regel-/steuerbaren Zudosierung von dem Fluid 10 in Fluidteilströmen 10.T (Pfeil).FIG. 4 shows a schematic detail of the means 9 for preferably controllable metered addition of the fluid 10 into partial fluid streams 10.T (arrow).
Die in unterschiedlicher Höhe mündenden Zudosierkanäle 11 des Mittels 9 zur vorzugsweise regel-/steuerbaren Zudosierung sind in gleichen Abständen a angeordnet und der jeweils mit dem gemeinsamen Versorgungskanal 12 verbun- dene Zudosierkanal 11 des Mittels 9 zur vorzugsweise regel-/steuerbaren Zudosierung weist eine kreisrunde Querschnittfläche 1 1 .Q mit einem Durchmesser 1 1 . D von 2 bis 10 mm, vorzugsweise von 4 bis 6 mm, auf. Der gemeinsame Versorgungskanal 12 des Mittels 9 zur vorzugsweise regel-/steuerbaren Zudosierung hingegen weist eine kreisrunde Querschnittfläche 12.Q mit einem Durch- messer 12.D von 6 bis 20 mm, vorzugsweise von 10 bis 15 mm, auf. Der Auftreffpunkt P der Öffnungsmittellinie 11. M der einzelnen Zudosieröffnung 11.0 des Zudosierkanals 11 auf das Turbulenzerzeugungsmittel 13 liegt annähernd mittig, vorzugsweise mittig zwischen den beiden Spaltenebenen zweier benachbarter Strömungskanäle 14 des Turbulenzerzeugungsmittels 13. Und das den jeweiligen Stoffauflauf 1 der Figuren 1 bis 4 durchströmende Fluid 10 besteht zumindest aus Wasser, insbesondere Siebwasser oder Klarwasser, oder aus wenigstens einer Faserstoffsuspension, deren Konzentration sich von der durchschnittlichen Konzentration der wenigstens einen in dem Stoffauflauf 1 strömenden Faserstoffsuspension 2 unterscheidet.The metering channels 11 of the means 9 for preferably controllable metering, which discharge at different heights, are arranged at equal intervals a and the metering channel 11 of the means 9 for preferably metered / controllable metering connected in each case to the common supply channel 12 has a circular cross-sectional area 1 1 .Q with a diameter of 1 1. D from 2 to 10 mm, preferably from 4 to 6 mm. The common supply channel 12 of the means 9 for preferably controllable metered addition, however, has a circular cross-sectional area 12.Q with a diameter 12.D of 6 to 20 mm, preferably from 10 to 15 mm. The impact point P of the opening center line 11 M of the individual metering opening 11.0 of the metering channel 11 on the turbulence generating means 13 is approximately centrally, preferably centrally between the two column planes of two adjacent flow channels 14 of the turbulence generating means thirteenth And the fluid 10 flowing through the respective headbox 1 of FIGS. 1 to 4 consists at least of water, in particular white water or clear water, or of at least one fibrous suspension whose concentration differs from the average concentration of the at least one fibrous suspension 2 flowing in the headbox 1.
Der jeweils in den Figuren dargestellte und beschriebene Stoffauflauf 1 eignet sich in besonderem Maße zur Verwendung in einer Maschine zur Herstellung einer Faserstoffbahn 3, insbesondere Papier- oder Kartonbahn, aus wenigstens einer Faserstoffsuspension 2.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.
Zusammenfassend ist festzuhalten, dass durch die Erfindung ein Stoffauflauf der eingangs genannten Art derart verbessert wird, dass die zuvor erwähnten Nachteile des Stands der Technik weitestgehend, vorzugsweise vollständig beseitigt werden. Dabei wird der Druckverlust zur vorzugsweise möglichst gleichmäßigen Verteilung der Faserstoffsuspension möglichst gering und optimal verteilt. Auch wird der Energieverbrauch des Stoffauflaufs merklich reduziert, die Stabilität des Faserorientierungs(quer)profils verbessert und der Verbrauch an Chemikalien, insbesondere Retentionsmittel reduziert. In summary, it should be noted that a headbox of the type mentioned above is improved by the invention so that the aforementioned disadvantages of the prior art as far as possible, preferably completely eliminated. In this case, the pressure loss for preferably uniform distribution of the pulp suspension is distributed as low as possible and optimal. Also, the energy consumption of the headbox is significantly reduced, improves the stability of the fiber orientation (transverse) profile and reduces the consumption of chemicals, in particular retention agents.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Stoffauflauf1 headbox
2 Faserstoffsuspension (Pfeil)2 pulp suspension (arrow)
3 Faserstoffbahn3 fibrous web
4 Zuführvorrichtung4 feeding device
5.1 Querverteilrohr5.1 Cross distribution pipe
5.2 Zentralverteiler5.2 Central distributor
5.21 Schlauch5.21 hose
6 Verteilrohrlochplatte6 distribution pipe hole plate
6.L Länge6.L length
7 Kanal7 channel
7.DM Mittlerer Kanaldurchmesser7.DM Medium channel diameter
7.Q Kanalquerschnitt7.Q channel cross-section
8 Zwischenkanal8 intermediate channel
9 Mittel zur vorzugsweise regel-/steuerbaren Zudosie rung von einem Fluid9 means for preferably regulated / controllable Zudosie tion of a fluid
9.H Höhe9.H height
9.L Länge9.L length
10 Fluid (Pfeil)10 fluid (arrow)
10.T Fluidteilstrom (Pfeil)10.T partial fluid flow (arrow)
11 Zudosierkanal11 metering channel
11. D Durchmesser11. D diameter
11. M Öffnungsmittellinie11. M opening centerline
11.0 Zudosieröffnung11.0 metering opening
11. Q Querschnittfläche11. Q cross-sectional area
12 Versorgungskanal12 supply channel
12. D Durchmesser12. D diameter
12.Q Querschnittfläche12.Q cross-sectional area
13 Turbulenzerzeugungsmittel13 turbulence generating means
14 Strömungskanal 15 Kammer14 flow channel 15 chamber
16 Stoffauflaufdüse16 headbox nozzle
17 Düsenspalt17 nozzle gap
18 Blende18 aperture
19 Hydraulisches Element19 Hydraulic element
20 Einlauffase20 intake chamfer
21 Stetige Erweiterung21 Continuous extension
21.1 Konus21.1 cone
22 Sprungartige Erweiterung22 Leap-like extension
22.1 Stufensprung22.1 increment
22.2 Stufensprung22.2 increment
A Abstand a AbstandA distance a distance
B Breite (Pfeil)B width (arrow)
P AuftreffpunktP impact point
T TeilungT division
S SpalteS column
Z ZeileZ line
Δp1 Erster DruckverlustΔp1 First pressure loss
Δp2 Zweiter Druckverlust α Konuswinkel Δp2 Second pressure loss α cone angle

Claims

Stoffauflauf für eine Maschine zur Herstellung einer FaserstoffbahnPatentansprüche Headbox for a machine for producing a fibrous web Patentansprüche
Stoffauflauf (1 ) für eine Maschine zur Herstellung einer Faserstoffbahn (3), insbesondere Papier- oder Kartonbahn, aus wenigstens einer Faserstoffsuspension (2), mit einer die wenigstens eine Faserstoffsuspension (2) zuführenden Zuführvorrichtung (4, 5.1 ; 4, 5.2) mit einer sich stromabwärts anschließenden und eine Vielzahl von in Zeilen (Z) und in Spalten (S) ange- ordneten Kanälen (7) aufweisenden Verteilrohrlochplatte (6), mit einem stromabwärts dazu liegenden, sich über die Breite (B) des Stoffauflaufs (1 ) erstreckenden Zwischenkanal (8) mit mehreren in Breitenrichtung des Stoffauflaufs (1 ) zueinander beabstandeten Mitteln (9, 9.1 ) zur vorzugsweise regel-/steuerbaren Zudosierung von einem Fluid (10) in Fluidteilströmen (10.T) in die wenigstens eine Faserstoffsuspension (2), wobei das einzelneHeadbox (1) for a machine for producing a fibrous web (3), in particular paper or board web, from at least one pulp suspension (2), with a feeding device (4, 5.1, 4, 5.2) feeding the at least one pulp suspension (2) a downstream and a plurality of arranged in rows (Z) and in columns (S) channels (7) having distribution well plate (6), with a downstream lying across the width (B) of the headbox (1) extending intermediate channel (8) with a plurality in the width direction of the headbox (1) spaced from each other means (9, 9.1) for preferably controllable metered addition of a fluid (10) in partial fluid streams (10.T) in the at least one pulp suspension (2) , where the single
Mittel (9, 9.1 ) jeweils mehrere eine jeweilige Zudosierkanalöffnung (11.0) und Öffnungsmittellinie (11.M) aufweisende, in unterschiedlichen Höhen mündende und mit einem gemeinsamen Versorgungskanal (12) verbundene Zudosierkanäle (11 ) umfasst, mit einem stromabwärts angeordneten Turbu- lenzerzeugungsmittel (13) mit einer Vielzahl von in Zeilen (Z) und in SpaltenEach comprising a respective Zudosierkanalöffnung (11.0) and opening center line (11.M), at different heights and opening connected to a common supply channel (12) Zudosierkanäle (11), with a downstream turbulence generating means (11) 13) with a plurality of rows (Z) and columns
(S) angeordneten Strömungskanälen (14), und mit einer sich dem Turbulenzerzeugungsmittel (13) unmittelbar anschließenden und einen Düsenspalt (17) aufweisenden Stoffauflaufdüse (16), dadurch gekennzeichnet, dass er aufgrund seiner Ausgestaltung einen Systemdruckverlust aufweist, der sich im Wesentlichen aus einem ersten Druckverlust (Δp1 ) zwischen der Zuführvorrichtung (4, 5.1 ; 4, 5.2) und dem Zwischenkanal (8) und einem zweiten Druckverlust (Δp2) in dem Turbulenzerzeugungsmittel (13) zusammensetzt, wobei der zweite Druckverlust (Δp2) und der erste Druckverlust (Δp1 ) in einem Verhältnis in einem Bereich von 8:1 bis 1 :1 , vorzugsweise von 4:1 bis 1 :1 , insbesondere von 2:1 bis 1 :1 , liegen.(S) arranged flow channels (14), and with the turbulence generating means (13) immediately adjoining and a nozzle gap (17) having headbox nozzle (16), characterized in that it has a system pressure loss due to its design, which consists essentially of a first pressure loss (Δp1) between the supply device (4, 5.1, 4, 5.2) and the intermediate channel (8) and a second pressure loss (Δp2) in the turbulence generating means (13), wherein the second pressure loss (Δp2) and the first pressure loss (Δp1) are in a ratio in a range of 8: 1 to 1: 1, preferably 4: 1 to 1: 1, in particular from 2: 1 to 1: 1, lie.
2. Stoffauflauf (1 ) nach Anspruch 1 , dadurch gekennzeichnet, dass der zweite Druckverlust (Δp2) in dem Turbulenzerzeugungsmittel (13) in einem Bereich von 0,1 bis 1 ,5 bar, vorzugsweise von 0,2 bis 1 ,0 bar, insbesondere von 0,3 bis 0,5 bar, liegt.2. headbox (1) according to claim 1, characterized in that the second pressure loss (Δp2) in the turbulence generating means (13) in a range of 0.1 to 1, 5 bar, preferably from 0.2 to 1, 0 bar, in particular from 0.3 to 0.5 bar.
3. Stoffauflauf (1 ) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Zuführvorrichtung (4) ein an die Verteilrohrlochplatte (6) angebrachtes Querverteilrohr (5.1 ) umfasst und dass die3. headbox (1) according to claim 1 or 2, characterized in that the supply device (4) to the distribution well plate (6) mounted transverse distribution pipe (5.1) and that the
Verteilrohrlochplatte (6) mit hydraulischen Elementen (19) zur Druckrückgewinnung, wie beispielsweise Diffusoren (21 ), Stufend iffusoren (22) oder ähnlichem, versehen ist.Distributor well plate (6) with hydraulic elements (19) for pressure recovery, such as diffusers (21), step endforsors (22) or the like, is provided.
4. Stoffauflauf (1 ) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Zuführvorrichtung (4) einen eine Vielzahl von Schläuchen (5.21 ) aufweisenden Zentralverteiler (5.2), dessen Schläuche (5.21 ) mit den Kanälen (7) der Verteilrohrlochplatte (6) verbunden sind, umfasst.4. headbox (1) according to claim 1 or 2, characterized in that the supply device (4) has a plurality of hoses (5.21) having central distributor (5.2), the hoses (5.21) with the channels (7) of the Verteilrohrlochplatte (6 ).
5. Stoffauflauf (1 ) nach Anspruch 4, dadurch gekennzeichnet, dass die Vielzahl von Schläuchen (5.21 ) mit hydraulischen Elementen (19) zur Druckrückgewinnung, wie beispielsweise Diffusoren (21 ), Stufend iffuso- ren (22) oder ähnlichem, versehen ist. 5. headbox (1) according to claim 4, characterized in that the plurality of hoses (5.21) with hydraulic elements (19) for pressure recovery, such as diffusers (21), stages iffuso- ren (22) or the like provided.
6. Stoffauflauf (1 ) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die wenigstens eine der Zuführvorrichtung (4, 5.1 ) zugeführte Faserstoffsuspension (2) ausschließlich den sich stromabwärts anschließen- den Kanälen (7) der Verteilrohrlochplatte (6) zugeführt ist.6. Headbox (1) according to any one of the preceding claims, characterized in that the at least one of the feed device (4, 5.1) supplied pulp suspension (2) is fed exclusively to downstream of the channels (7) of the distribution well plate (6).
7. Stoffauflauf (1 ) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Auftreffpunkt (P) der Öffnungsmittellinie (11.M) der einzelnen Zudo- sieröffnung (11.0) auf das Turbulenzerzeugungsmittel (13) annähernd mittig, vorzugsweise mittig zwischen den beiden Spaltenebenen zweier benachbarter Strömungskanäle (14) liegt.7. Headbox (1) according to any one of the preceding claims, characterized in that the point of impingement (P) of the opening center line (11.M) of the individual metering sieröffnung (11.0) on the turbulence generating means (13) approximately centrally, preferably centrally between the two Column levels of two adjacent flow channels (14).
8. Stoffauflauf (1 ) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Zudosieröffnung des Mittels (9, 9.1 ) zur vorzugsweise regel- /steuerbaren Zudosierung von dem Fluid (10) in Fluidteilströmen (OT) wenigstens eine Faserstoffsuspension (2) zu dem Turbulenzerzeugungsmittel (13) einen senkrechten Abstand (A) im Bereich von 2 bis 100 mm, vorzugsweise von 3 bis 50 mm, insbesondere von 5 bis 30 mm, aufweist.8. headbox (1) according to any one of the preceding claims, characterized in that the metering of the means (9, 9.1) for preferably controllable / metered addition of the fluid (10) in partial fluid streams (OT) at least one pulp suspension (2) the turbulence generating means (13) has a vertical distance (A) in the range of 2 to 100 mm, preferably from 3 to 50 mm, in particular from 5 to 30 mm.
9. Stoffauflauf (1 ) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das jeweilige Mittel (9) zur vorzugsweise regel-/steuerbaren Zudosie- rung von dem Fluid (10) in Fluidteilströmen (10.T) in die wenigstens eine9. Headbox (1) according to any one of the preceding claims, characterized in that the respective means (9) for preferably controllable / metered metered addition of the fluid (10) in partial fluid streams (10.T) in the at least one
Faserstoffsuspension (2) ein Dosierschwert (9.1 ) umfasst.Pulp suspension (2) comprises a metering blade (9.1).
10. Stoffauflauf (1 ) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Fluid (10) aus Wasser, insbesondere Siebwasser oder Klarwasser, oder aus wenigstens einer Faserstoffsuspension, deren Konzentration sich von der durchschnittlichen Konzentration der wenigstens einen in dem Stoffauflauf (1 ) strömenden Faserstoffsuspension (2) unterscheidet, besteht.10. headbox (1) according to any one of the preceding claims, characterized in that the fluid (10) of water, in particular white water or clear water, or from at least one pulp suspension whose concentration is is different from the average concentration of the at least one pulp suspension (2) flowing in the head box (1).
11. Maschine zur Herstellung einer Faserstoffbahn (3), insbesondere Papier- oder Kartonbahn, mit wenigstens einem Stoffauflauf (1 ) nach einem der11. Machine for producing a fibrous web (3), in particular paper or board web, with at least one headbox (1) according to one of
Ansprüche 1 bis 10. Claims 1 to 10.
EP09740126A 2008-12-18 2009-10-22 Headbox for a machine for producing a fibrous web Active EP2379800B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008054896A DE102008054896A1 (en) 2008-12-18 2008-12-18 Headbox for a machine for producing a fibrous web
PCT/EP2009/063846 WO2010069653A1 (en) 2008-12-18 2009-10-22 Headbox for a machine for producing a fibrous web

Publications (2)

Publication Number Publication Date
EP2379800A1 true EP2379800A1 (en) 2011-10-26
EP2379800B1 EP2379800B1 (en) 2012-12-12

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EP09740126A Active EP2379800B1 (en) 2008-12-18 2009-10-22 Headbox for a machine for producing a fibrous web

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US (1) US8236137B2 (en)
EP (1) EP2379800B1 (en)
CN (1) CN102216523B (en)
DE (1) DE102008054896A1 (en)
WO (1) WO2010069653A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010001555A1 (en) 2010-02-03 2011-08-04 Voith Patent GmbH, 89522 Valve for regulating a fluid flow
DE102010001557A1 (en) 2010-02-03 2011-08-04 Voith Patent GmbH, 89522 Valve for regulating a fluid flow
DE102010028408A1 (en) 2010-04-30 2011-11-03 Voith Patent Gmbh Valve for regulating a fluid flow
DE102010028404A1 (en) 2010-04-30 2011-11-03 Voith Patent Gmbh Valve for regulating a fluid flow
DE102010028403A1 (en) 2010-04-30 2011-11-03 Voith Patent Gmbh Valve for regulating a fluid flow
DE102010030352A1 (en) 2010-06-22 2011-12-22 Voith Patent Gmbh Headbox for a machine for producing a fibrous web
DE102010038891A1 (en) 2010-08-04 2012-02-09 Voith Patent Gmbh Headbox for machine to manufacture e.g. packaging paper web from fibrous material suspension, has partial flow lines arranged adjacent to secondary feed device and arranged non-adjacent to intermediate channel and/or fluid metering units
DE102011079715A1 (en) 2011-07-25 2013-01-31 Voith Patent Gmbh Headbox for machine for producing fibrous web e.g. paper, has distributor main structure having specified cross-sectional area ratio and width-height ratio
DE102011083085A1 (en) 2011-09-21 2013-03-21 Voith Patent Gmbh Headbox for a machine for producing a fibrous web
US8871059B2 (en) * 2012-02-16 2014-10-28 International Paper Company Methods and apparatus for forming fluff pulp sheets
CN103422384B (en) * 2013-08-08 2015-04-22 华南理工大学 Hydraulic power experimental flow box capable of being used for flow field measurement and visualization research

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4213707A1 (en) * 1992-04-25 1993-10-28 Escher Wyss Gmbh Headbox device for a paper machine
DE4320243C2 (en) * 1993-06-18 1996-02-22 Voith Sulzer Papiermasch Gmbh Headbox for a paper machine
DE4416899C2 (en) 1994-05-13 1997-12-18 Voith Sulzer Papiermasch Gmbh Process for the local admixing of fluid into a headbox and device for its execution
DE4416898C2 (en) 1994-05-13 1996-03-28 Voith Sulzer Papiermasch Gmbh Headbox for a paper machine with local admixing of fluid
DE4416909C2 (en) 1994-05-13 1997-12-11 Voith Sulzer Papiermasch Gmbh Headbox for a paper machine
DE59500664D1 (en) * 1994-05-13 1997-10-23 Voith Sulzer Papiermasch Gmbh Headbox for a paper machine with local admixing of fluid
DE4437180C2 (en) * 1994-10-18 1997-03-20 Voith Sulzer Papiermasch Gmbh Process for producing a headbox and intermediate part of a headbox of a paper or board machine
KR100423178B1 (en) * 1996-04-18 2004-06-30 메트소 페이퍼, 인코포레이티드 General adjustment of the head box and / or forming device of a paper machine or the like
EP0824157B1 (en) 1996-08-14 2001-12-05 Voith Paper Patent GmbH Headbox and process for the distribution of a fibrous suspension in the headbox of a paper making machine
FI110704B (en) * 1996-10-18 2003-03-14 Metso Paper Inc Multilayer Headbox Mass Feeding System and Method for Multilayer Headboard Operation
FI115645B (en) * 1997-01-14 2005-06-15 Metso Paper Inc Paper machine inlet box with edge feeding arrangement
DE19926805A1 (en) * 1999-06-12 2000-12-14 Voith Sulzer Papiertech Patent Stock inlet for a papermaking machine etc has one or more fluid injectors at the turbulence tubes to inject controlled fluid doses with min effect on the total suspension vol flow
DE10102087A1 (en) * 2001-01-18 2001-06-13 Voith Paper Patent Gmbh Adjustment of fiber orientation in pulp suspension takes place in turbulence generator tube where step changes in cross section have variable separation for flow control
DE10245154A1 (en) 2002-09-27 2004-04-15 Voith Paper Patent Gmbh Headbox for carton or papermaking machine mixes two types of fluid in a profiled chamber incorporating profiled triangular keel with fluid outlets
WO2007089900A2 (en) * 2006-02-01 2007-08-09 Astenjohnson, Inc. Headbox and stock delivery system for a papermaking machine
DE102008043145A1 (en) 2008-10-24 2010-04-29 Voith Patent Gmbh Two-layer casserole for a machine for producing a two-layer fibrous web
EP2199459A1 (en) 2008-12-16 2010-06-23 Voith Patent GmbH Sheet composition system for a machine for producing a multiple layer sheet of fibrous material
DE102008054898A1 (en) 2008-12-18 2010-06-24 Voith Patent Gmbh Headbox for a machine for producing a fibrous web

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010069653A1 *

Also Published As

Publication number Publication date
US20110265968A1 (en) 2011-11-03
US8236137B2 (en) 2012-08-07
CN102216523A (en) 2011-10-12
WO2010069653A1 (en) 2010-06-24
DE102008054896A1 (en) 2010-07-01
CN102216523B (en) 2014-01-01
EP2379800B1 (en) 2012-12-12

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