EP0418445A1 - Vorrichtung zum Zuführen einer Faserstoffaufschwemmung - Google Patents

Vorrichtung zum Zuführen einer Faserstoffaufschwemmung Download PDF

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Publication number
EP0418445A1
EP0418445A1 EP89402582A EP89402582A EP0418445A1 EP 0418445 A1 EP0418445 A1 EP 0418445A1 EP 89402582 A EP89402582 A EP 89402582A EP 89402582 A EP89402582 A EP 89402582A EP 0418445 A1 EP0418445 A1 EP 0418445A1
Authority
EP
European Patent Office
Prior art keywords
outlet
distribution box
inlet
pasty mixture
nozzle
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Withdrawn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
EP89402582A
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English (en)
French (fr)
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.)
Semti A Responsabilite Ltee Ste
S E M T I SARL
Original Assignee
Semti A Responsabilite Ltee Ste
S E M T I SARL
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
Priority to FR8806480A priority Critical patent/FR2631353A1/fr
Application filed by Semti A Responsabilite Ltee Ste, S E M T I SARL filed Critical Semti A Responsabilite Ltee Ste
Priority to EP89402582A priority patent/EP0418445A1/de
Priority to CA000614141A priority patent/CA1327471C/fr
Priority to US07/422,050 priority patent/US5030326A/en
Publication of EP0418445A1 publication Critical patent/EP0418445A1/de
Withdrawn legal-status Critical Current

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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
    • D21F1/028—Details of the nozzle section
    • 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
    • D21F1/06—Regulating pulp flow
    • 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
    • D21F1/08—Regulating consistency

Definitions

  • the invention relates to a device for supplying a pasty mixture, such as paper pulp, in order to form a sheet of pulp through a nozzle mounted at the outlet of a distribution box.
  • a pasty mixture such as paper pulp
  • Devices of this type are already known, intended for the distribution and the formation of fibrous webs or not by means of a pasty mixture, according to a process called "by the liquid route" because the humidity is high, by example of the order of 99.4% for paper pulp, in which the concentration of the mixture is adjustable; this concentration is adjusted upstream of the supply beam of a "box” for distributing the mixture to a nozzle bringing the dough onto one or between two drum (s) carrying drip sheets; the grammage of the sheet is adjusted by the sectional control of the dough flow rate made by spreading the lips more or less locally from the nozzle of the nozzle mounted at the outlet of the distribution box; it results from the change in speed of the jet at constant concentration, the control of the desired grammage, but also a change in the resistance vector direction machine / cross direction.
  • the object of the invention is to remedy this drawback and also to create a device for supplying a pasty mixture which is both simple, reliable, inexpensive, and easy to implement.
  • the invention relates to a device for supplying a pasty mixture, such as paper pulp, with a view to forming a sheet of pulp through at least one nozzle mounted at the outlet of a distribution box.
  • a device for supplying a pasty mixture such as paper pulp
  • each circuit comprises a liquid supply channel and a concentrated paste supply channel each provided with a flow control valve and connected downstream of these valves by a mixer comprising an outlet which is itself connected to an inlet of the distribution box, in that the distribution box comprises ejection channels delimited by longitudinal partitions, and in that each circuit is in correspondence with an ejection channel.
  • the device allows independent control, in sections, in the cross direction of the ejection by the nozzle, of the concentration and of the flow, and the grammage is no longer the exclusive consequence of the adjustment of the flow.
  • the device shown in Figure 1 is of the two-circuit type and intended to supply a mixture of pasty fibers, more precisely pulp, by means of one or more jets, the interval between two rollers of a paper-making machine, so as to form by means of these two rollers carrying webs drip formation, a sheet of dough which will then be dried to form a sheet of paper.
  • This device here comprises a distribution box 1 for dough, provided with dough outlet nozzles 2 (and in any case at least one nozzle), the ejection nozzles 21 of which are kept fixed in the immediate vicinity of the interval between the two rollers 3 and the extension of the longitudinal axis of which passes through this interval, for example substantially at equal distance from these two rollers 3.
  • this distribution box 1 open one or more bundles of supply of pasty mixture, each consisting one or more circuits 4 for supplying a pasty mixture each provided with an injector-mixer 5 of concentrated paste and of dilution liquid and of two routes 6, 7 for bringing this paste and this liquid respectively to the injector- mixer.
  • the device shown in the drawings shows a single distribution box 1 provided with a single outlet nozzle 2 and supplied by a two-circuit supply bundle 4, this device may include several distribution boxes arranged side by side and each provided with several nozzles aligned in a direction extending parallel to the respective longitudinal axes of the two drums 3. Similarly, in the distribution box 1 can open several bundles of supply circuits also aligned in a direction extending parallel to the same longitudinal axes.
  • the distribution box 1 and the outlet (s) 51 of the injector-mixers 5 of each circuit 4 for supplying a pasty mixture are connected by conduits 40 opening into inputs respectively provided at the upper part and at the lower part. of the distribution box 1, these conduits 40 possibly being in several segments connected by flanges 41; the injector-mixers 5 comprise, in their face opposite to that of their outlet (s) 51 for one or more pipes (40) for supplying pasty mixture, an inlet 52 into which a pipe 60 of concentrated pulp supply belonging to the pulp supply path 6, while the pipe 70 for supplying dilution liquid belonging to the liquid supply path 7 opens into the injector-mixer, in an orthogonal direction, through an inlet 53 for the liquid.
  • a valve 61 for adjusting concentrated paste is inserted, and into the way 7 for supplying dilution liquid coming from a liquid supply device, is inserted a valve 71 for adjusting dilution rate.
  • the movable members of the valves 61 for adjusting the dough flow rate and the valves 71 for adjusting the dilution liquid flow rate can be connected to a manual control means, or to an automatic control means such as a controlled computer itself. manually or automatically depending on instructions and information sent from measuring devices by any means of transmission known per se (not shown in the drawings). This information and these instructions relate, in the present case, to the profile control of the weight and resistance characteristics of the sheet obtained in the direction of distribution and in the cross direction thereof.
  • the injector-mixers 5 arranged downstream of the valves have a generally substantially frustoconical shape (FIG. 2), for example made up of two truncated cones 54, 55 placed side by side with different conicities but of the same direction, the diameter of which decreases from their base where finds the inlet 52 for the concentrated dough up to that where the outlet 51 for the pasty mixture is located; the inlet 53 for the dilution liquid is located near the inlet 52 for the paste, but its central axis is orthogonal to that of the first, that is to say to the longitudinal axis of the injector -mixer; the inlet 52 for the dough is provided with an injection nozzle 56 whose longitudinal position of the nozzle 561 is adjustable in the injector-mixer over a certain range around the central region thereof; however, the nozzle 561 of the nozzle always remains in front of a perforated grid 57 extending transversely in the injector-mixer and determining, behind it (i.e.
  • a second perforated grid 58 extends in front of the first and of the nozzle 561 of concentrated dough inlet, parallel to this first perforated grid 57, that is to say transversely to the injector-mixer, determining forward a pasty mixture outlet chamber into which the outlet pipe opens.
  • the two inlets 52, 53 and the outlet 51 are provided with a flange.
  • this tongue 11 In the outlet region of the distribution box 1, behind the nozzles 2, extends longitudinally a forming tongue 11 arranged horizontally (FIG. 3), intended to promote the good distribution of the pasty mixture, by turbulence; this tongue 11 has a symmetrical upper face and lower face, having in longitudinal section a sawtooth profile whose teeth have a slightly inclined rear edge, a very inclined front edge, and a rounded bottom.
  • this forming tab 11 the distribution box is partitioned (FIG.
  • each circuit of the supply beam corresponds to an ejection channel 12 created by partitioning the cross section of the region Release ;
  • the partitions 13 therefore extend longitudinally in this zone, that is to say also in the direction of ejection, vertically, until the end of the forming tab, or beyond forwards if necessary , the calculation can be carried out case by case;
  • these partitions 13 are corrugated at least in their end zone, on the outlet side of the jet, in order to prevent any hydraulic marking in the formation of the sheet.
  • the concentrated paste and the dilution liquid are introduced into the injector-mixers 5 and, from there, the mixture is directed by the supply circuits 4, in the supply box 1; then, from this feed box, the pasty mixture is injected through the nozzles 2 between the two rollers 3, without any hydraulic marking appearing.

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  • Paper (AREA)
  • Coating Apparatus (AREA)
EP89402582A 1988-05-13 1989-09-21 Vorrichtung zum Zuführen einer Faserstoffaufschwemmung Withdrawn EP0418445A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR8806480A FR2631353A1 (fr) 1988-05-13 1988-05-13 Dispositif d'alimentation en melange pateux
EP89402582A EP0418445A1 (de) 1988-05-13 1989-09-21 Vorrichtung zum Zuführen einer Faserstoffaufschwemmung
CA000614141A CA1327471C (fr) 1988-05-13 1989-09-28 Dispositif d'alimentation en melange pateux
US07/422,050 US5030326A (en) 1988-05-13 1989-10-16 Paste-like mixture feed device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8806480A FR2631353A1 (fr) 1988-05-13 1988-05-13 Dispositif d'alimentation en melange pateux
EP89402582A EP0418445A1 (de) 1988-05-13 1989-09-21 Vorrichtung zum Zuführen einer Faserstoffaufschwemmung
CA000614141A CA1327471C (fr) 1988-05-13 1989-09-28 Dispositif d'alimentation en melange pateux
US07/422,050 US5030326A (en) 1988-05-13 1989-10-16 Paste-like mixture feed device

Publications (1)

Publication Number Publication Date
EP0418445A1 true EP0418445A1 (de) 1991-03-27

Family

ID=27426726

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89402582A Withdrawn EP0418445A1 (de) 1988-05-13 1989-09-21 Vorrichtung zum Zuführen einer Faserstoffaufschwemmung

Country Status (4)

Country Link
US (1) US5030326A (de)
EP (1) EP0418445A1 (de)
CA (1) CA1327471C (de)
FR (1) FR2631353A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0632159A1 (de) * 1993-06-28 1995-01-04 J.M. Voith GmbH Stoffauflauf und Verfahren zur Erzeugung einer mehrschichtigen und mehrlagigen Papierbahn
EP0634523A1 (de) * 1993-07-01 1995-01-18 Valmet Paper Machinery Inc. Verfahren zur Regelung eines Mehrschichtstoffauflaufkastens und Mehrschichtstoffauflaufkasten

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2631353A1 (fr) * 1988-05-13 1989-11-17 Semti Dispositif d'alimentation en melange pateux
DE4005281C2 (de) * 1990-02-20 1995-04-06 Schultz Hans Joachim Dr Ing Stoffauflauf mit Regelung des Flächengewicht-Querprofiles über die Verdünnung der Fasersuspension
DE4019593C2 (de) * 1990-06-20 1994-01-20 Voith Gmbh J M Stoffauflauf für Papiermaschinen
US5707495A (en) * 1990-06-20 1998-01-13 J.M. Voith Gmbh Headbox for papermaking machine with more uniform flow
US5196091A (en) * 1991-10-29 1993-03-23 Beloit Technologies, Inc. Headbox apparatus with stock dilution conduits for basis weight control
DE4211291C3 (de) * 1992-04-03 2001-06-07 Voith Gmbh J M Mischeinrichtung und Verfahren zum Mischen von zwei Flüssigkeiten bei konstantem Gemischvolumenstrom zur Versorgung des Stoffauflaufs einer Papiermaschine
DE4211290C2 (de) * 1992-04-03 1994-07-07 Voith Gmbh J M Mischeinrichtung mit veränderlichen Rohrquerschnitten zum Mischen von zwei Flüssigkeiten bei konstantem Gemischvolumenstrom zur Versorgung des Stoffauflaufs einer Papiermaschine
DE4320243C2 (de) † 1993-06-18 1996-02-22 Voith Sulzer Papiermasch Gmbh Stoffauflauf für eine Papiermaschine
FI92229C (fi) * 1993-07-01 1994-10-10 Valmet Paper Machinery Inc Menetelmä ja laite perälaatikon säädössä
EP0681057B1 (de) * 1994-04-29 2002-08-28 Voith Paper Patent GmbH Mehrschichten-Stoffauflauf
DE4433445C1 (de) 1994-09-20 1996-03-28 Voith Gmbh J M Stoffauflauf einer Papiermaschine
US5626722A (en) * 1995-06-01 1997-05-06 Valmet Corporation Headbox of a paper/board machine
FI98938C (fi) * 1996-06-20 1997-09-10 Valmet Corp Laitteisto laimennusvirtauksen yhdistämiseksi paperikoneen/kartonkikoneen jakotukista johdettuun massavirtaukseen
US5938896A (en) * 1997-09-30 1999-08-17 Voith Sulzer Paper Technology North America, Inc. Hydraulic increaser for a wet end of a paper-making machine
FI104384B (fi) * 1998-06-05 2000-01-14 Valmet Corp Laitteisto ja menetelmä viiraveden ja tuoremassan sekoittamiseksi viirakaivon jälkeisessä kanavassa
FI114030B (fi) * 1999-10-12 2004-07-30 Metso Paper Inc Menetelmä ja sovitelma paperinvalmistuksen massakomponenttien sekoittamiseksi
DE102004000051A1 (de) * 2004-11-19 2006-05-24 Voith Paper Patent Gmbh Stoffauflauf einer Maschine zur Herstellung einer Fasersstoffbahn
DE102019111122A1 (de) * 2019-04-30 2020-11-05 Voith Patent Gmbh Injektordüse

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1429879A (fr) * 1965-04-10 1966-02-25 Bailey Meter Co Système de commande pour machine à papier à tête de distribution sous pression
FR1571410A (de) * 1967-04-15 1969-06-20
FR2107699A5 (en) * 1970-09-17 1972-05-05 Bruderhaus Maschinen Gmbh Nonwoven web wet-forming device - with suspension discharged directly into distributor
US3846229A (en) * 1972-01-28 1974-11-05 Lodding Engineering Corp Flow systems for inducing fine-scale turbulence
DE3422846A1 (de) * 1983-06-20 1984-12-20 Mitsubishi Jukogyo K.K., Tokio/Tokyo Papiermaschinen-stoffauflauf
US4604164A (en) * 1985-01-30 1986-08-05 Mitsubishi Jukogyo Kabushiki Kaisha Flow restraining elements in the headbox of a paper machine
FR2631353A1 (fr) * 1988-05-13 1989-11-17 Semti Dispositif d'alimentation en melange pateux

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021295A (en) * 1975-05-05 1977-05-03 Beloit Corporation Method and apparatus for supplying white water from a single silo in the formation of a multi-ply web
SE446889B (sv) * 1980-08-05 1986-10-13 Mitsubishi Heavy Ind Ltd Inloppslada vid en pappersmaskin
AT376251B (de) * 1980-12-19 1984-10-25 Escher Wyss Gmbh Einrichtung zur beschickung eines mehrlagen-stoffauflaufes fuer papiermaschinen
SE428810B (sv) * 1981-12-01 1983-07-25 Karlstad Mekaniska Ab Regelersystem for reglering av en flerskiktsinloppslada for en pappersmaskin
US4515655A (en) * 1983-08-15 1985-05-07 Westvaco Corporation Method of bleaching paper pulp by blending chlorine with a flow volume of paper pulp slurry

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1429879A (fr) * 1965-04-10 1966-02-25 Bailey Meter Co Système de commande pour machine à papier à tête de distribution sous pression
FR1571410A (de) * 1967-04-15 1969-06-20
FR2107699A5 (en) * 1970-09-17 1972-05-05 Bruderhaus Maschinen Gmbh Nonwoven web wet-forming device - with suspension discharged directly into distributor
US3846229A (en) * 1972-01-28 1974-11-05 Lodding Engineering Corp Flow systems for inducing fine-scale turbulence
DE3422846A1 (de) * 1983-06-20 1984-12-20 Mitsubishi Jukogyo K.K., Tokio/Tokyo Papiermaschinen-stoffauflauf
US4604164A (en) * 1985-01-30 1986-08-05 Mitsubishi Jukogyo Kabushiki Kaisha Flow restraining elements in the headbox of a paper machine
FR2631353A1 (fr) * 1988-05-13 1989-11-17 Semti Dispositif d'alimentation en melange pateux

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0632159A1 (de) * 1993-06-28 1995-01-04 J.M. Voith GmbH Stoffauflauf und Verfahren zur Erzeugung einer mehrschichtigen und mehrlagigen Papierbahn
EP0634523A1 (de) * 1993-07-01 1995-01-18 Valmet Paper Machinery Inc. Verfahren zur Regelung eines Mehrschichtstoffauflaufkastens und Mehrschichtstoffauflaufkasten
US5490905A (en) * 1993-07-01 1996-02-13 Valmet Paper Machinery, Inc. Method in the regulation of a multi-layer headbox and a multi-layer headbox

Also Published As

Publication number Publication date
CA1327471C (fr) 1994-03-08
FR2631353A1 (fr) 1989-11-17
US5030326A (en) 1991-07-09

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