EP0629739A1 - Caisse de tête pour machine à papier - Google Patents

Caisse de tête pour machine à papier Download PDF

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Publication number
EP0629739A1
EP0629739A1 EP94108842A EP94108842A EP0629739A1 EP 0629739 A1 EP0629739 A1 EP 0629739A1 EP 94108842 A EP94108842 A EP 94108842A EP 94108842 A EP94108842 A EP 94108842A EP 0629739 A1 EP0629739 A1 EP 0629739A1
Authority
EP
European Patent Office
Prior art keywords
intermediate chamber
headbox
turbulence
turbulence generator
headbox according
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
EP94108842A
Other languages
German (de)
English (en)
Other versions
EP0629739B1 (fr
EP0629739B2 (fr
Inventor
Alfred Dr. Bubik
Klaus Lehleiter
Hans Dr. Dahl
Peter Mirsberger
Karl-Heinz Enderle
Elmer Dr. Weisshuhn
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 Sulzer Papiermaschinen GmbH
Original Assignee
Escher Wyss GmbH
Voith Sulzer Papiermaschinen 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6490642&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0629739(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Escher Wyss GmbH, Voith Sulzer Papiermaschinen GmbH filed Critical Escher Wyss GmbH
Publication of EP0629739A1 publication Critical patent/EP0629739A1/fr
Publication of EP0629739B1 publication Critical patent/EP0629739B1/fr
Application granted granted Critical
Publication of EP0629739B2 publication Critical patent/EP0629739B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D21F1/022—Means for injecting material into flow within the headbox
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • 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
    • D21F1/026—Details of the turbulence 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

Definitions

  • the invention relates to a headbox for a paper machine according to the preamble of claim 1 or 2.
  • a headbox of the above Type is e.g. in the as yet unpublished German patent application P 42 13 707.
  • This particular embodiment of the previously reported object makes it possible, by adding air or another medium, in particular water, or its discharge in the region between two turbulence generators, to influence the material density and the flow state in the hydraulic headbox in a targeted manner.
  • One of the goals of this proposed measure is to be able to change the flow state in addition to the setting of the basis weight cross profile, which is carried out with the aid of geometric gap changes. It is namely known that cross flows, as can arise in particular when setting the basis weight cross profile, can cause an unsatisfactory state of the fiber orientation on the web formed.
  • the invention makes use of the knowledge that an intensive turbulence generator with a high pressure loss lying in front of the intermediate chamber favors the mixing and at the same time limits it locally as far as appropriate.
  • a hydraulic turbulence generator with a higher effect has comparatively smaller flow cross sections. It therefore offers enough space between the pipes or channels carrying the liquid for the additional measures mentioned in the characterizing part of claim 1 and is also often simpler in construction.
  • the comparatively small space requirement in the first turbulence generator through the individual channels can be used to accommodate the lines appropriately and in a space-saving manner.
  • a relatively clear dilution water or an aqueous suspension will be used and added as the fluid mentioned in the characterizing part of claims 1 and 2.
  • the pulp suspension flowing in the headbox can also be derived in part and in doses. A limited air supply is even possible, as long as the desired paper quality permits.
  • the solution proposed in claim 2 uses the space initially available in the turbulence generator located after the intermediate chamber to accommodate the lines, and the reversal of direction can provide an impulse for better mixing. Even if it is intended to accommodate the lines in the more space-consuming turbulence generator located downstream of the intermediate chamber, the fact that at the intermediate chamber can be exploited facing the side of the turbulence generator, smaller flow cross-sections are required for the channels carrying the suspension, which again results in a favorable installation situation for the inlets and outlets.
  • the turbulence generator can also be used as a rectifier with low pressure loss, so that the reversal of direction in the feed into the intermediate chamber then offers very advantageous support for the relatively weak mixing action in the rectifier.
  • FIG. 1 shows schematically a side view, partly in section, of an embodiment of the headbox according to the invention.
  • a liquid supply device 1 can be seen which opens into a turbulence generator 2 consisting of several pipelines 7.
  • An intermediate chamber 4 follows, which is followed by a further turbulence generator 3 downstream.
  • the one from this second Turbulence generator 3 material suspension exiting during operation of the headbox is collected in a nozzle space and fed to an exit gap 5, from which it hits at least one paper machine screen in the form of a wide gap.
  • the lines 6 and 6 'in the case shown here are connected to the pipelines 7 designed as step diffusers.
  • the intermediate chamber 4 can have a length that is 10 to 20 times as large as a step jump of a turbulence generator designed as a step diffuser, in order to achieve optimal mixing.
  • FIG. 2 shows a device similar to that in FIG. 1, the line 6 being the same for all the pipelines 7 lying one above the other.
  • the headbox shown in FIG. 3 contains, as the first turbulence generator 2, only a pipe 7, viewed in the vertical, which is also a step diffuser. Several locations are indicated at which a line 6 can be present. In most cases, the line which is not shown in broken lines and which opens into the first part of the turbulence generator will be the most advantageous option. Control valves are provided both in this line 6 and in the supply line to the turbulence generator 2, which can be controlled together via a control circuit. As a further possibility of influencing the flow in the turbulence generator 2 as desired, the change in the angle at which the line 6 opens into the turbulence generator 2 is indicated in FIG. 3. In this way, very specific impulses for better mixing can be generated. FIGS.
  • the lines 6 are spatially in the region of the first turbulence generator 2, but open into the intermediate chamber 4.
  • Such an embodiment is simpler and more compact in terms of construction, but nevertheless uses the turbulence with which the suspension exits the flow channels 8 and enters the intermediate chamber 4.
  • the turbulence generator 2 can also be formed by a block provided with flow channels 8 instead of by free-standing pipelines.
  • the flow channels 8 widen stepwise in the flow direction, that is to say they are designed as step diffusers.
  • the lines 6 can also be inserted into the headbox from the side.
  • the intermediate chamber 4 is divided into partial chambers by a number of walls 11 extending in the direction of flow and perpendicular to the sieve plane. In special cases, this can prevent undesired cross-mixing in the intermediate chamber 4.
  • the lines 6 open into the first part of the step-widening flow channels 8.
  • FIG. 8 shows, albeit schematically, the technical structure of a turbulence generator 2 provided with step-diffuser-like flow channels 8.
  • a turbulence generator 2 provided with step-diffuser-like flow channels 8.
  • bores with a diameter such that they cut into the flow channels 8 are made within the turbulence generator block such that they cut the flow channels, thereby establishing a connection between the flow channels and lines .
  • two adjacent rows of superimposed flow channels are connected to the same feed line. This embodiment is shown in somewhat more detail in FIG. 13.
  • the lines 6 can also lie within the second turbulence generator 3 and be connected to the intermediate chamber 4. In this way, an impulse is generated against the actual flow direction, which leads to a mixing of the water supplied with the suspension (FIGS. 9 and 10).
  • FIG. 11 shows a somewhat simpler embodiment, in which two channels are located one above the other in the turbulence generator 2 and the line 6 takes place only in one of the channels lying one above the other, in this case in the upper ones.
  • FIG. 12 shows the combination of supply of dilution water (arrow 12) in the turbulence generator 2 and withdrawal of suspension (arrow 13) in the turbulence generator 3.
  • the invention can also be easily implemented in multi-layer headboxes, as shown by way of example in FIG. 14.
  • the two-layer headbox shown schematically there has two independently feedable liquid supply devices 1, each of which is connected downstream by two turbulence generators 2 and 3, with an intermediate chamber 4 between each and a nozzle chamber with a partition 14 following the last turbulence generator 3 in the flow direction Exit gap 5 is at the end.

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  • Paper (AREA)
EP94108842A 1993-06-18 1994-06-09 Caisse de tête pour machine à papier Expired - Lifetime EP0629739B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4320243 1993-06-18
DE4320243A DE4320243C2 (de) 1993-06-18 1993-06-18 Stoffauflauf für eine Papiermaschine

Publications (3)

Publication Number Publication Date
EP0629739A1 true EP0629739A1 (fr) 1994-12-21
EP0629739B1 EP0629739B1 (fr) 1999-09-08
EP0629739B2 EP0629739B2 (fr) 2006-04-19

Family

ID=6490642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94108842A Expired - Lifetime EP0629739B2 (fr) 1993-06-18 1994-06-09 Caisse de tête pour machine à papier

Country Status (3)

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EP (1) EP0629739B2 (fr)
AT (1) ATE184336T1 (fr)
DE (2) DE4320243C2 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996030588A1 (fr) * 1995-03-29 1996-10-03 Beloit Technologies, Inc. Systeme d'injection d'additifs dans une caisse de tete
EP0745721A2 (fr) * 1995-06-01 1996-12-04 Valmet Corporation Système d'alimentation en pâte pour une caisse de tête à plusieurs couches et procédé pour l'opération d'une telle caisse de tête
EP0745722A2 (fr) * 1995-06-01 1996-12-04 Valmet Corporation Caisse de tête pour une machine à papier ou carton
WO1998049393A1 (fr) * 1997-04-29 1998-11-05 Beloit Technologies, Inc. Mise en forme a haute concentration de pate
EP1496151A1 (fr) * 2003-07-09 2005-01-12 Voith Paper Patent GmbH Caisse de tête
EP1496150A1 (fr) * 2003-07-09 2005-01-12 Voith Paper Patent GmbH Caisse de tête
EP1659213A2 (fr) * 2004-11-19 2006-05-24 Voith Paper Patent GmbH Caisse de tête
WO2010069653A1 (fr) 2008-12-18 2010-06-24 Voith Patent Gmbh Caisse de tête pour machine de fabrication d'une bande de matière fibreuse
CN101838949A (zh) * 2009-03-20 2010-09-22 安德里茨库斯特斯有限责任公司 用于调节定量横向分布的造纸机上的设备
US8221590B2 (en) 2008-12-18 2012-07-17 Voith Patent Gmbh Headbox for a machine for producing a fibrous web
US8236138B2 (en) 2008-12-18 2012-08-07 Voith Patent Gmbh Headbox for a machine for producing a fibrous web
CN103821023A (zh) * 2014-03-03 2014-05-28 广东石油化工学院 一种互补式布浆器
CN108166302A (zh) * 2018-01-10 2018-06-15 浙江山鹰纸业有限公司 一种用于双网纸机的流浆箱

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI115646B (fi) * 1996-11-26 2005-06-15 Metso Paper Inc Paperikoneen/kartonkikoneen monikerrosperälaatikko
DE19652442A1 (de) * 1996-12-17 1998-06-18 Voith Sulzer Papiermasch Gmbh Verfahren und Vorrichtung zur Verteilung einer Faserstoffsuspension
DE19705590A1 (de) * 1997-02-14 1998-08-20 Voith Sulzer Papiermasch Gmbh Stoffauflauf einer Papiermaschine
DE19705591A1 (de) * 1997-02-14 1998-08-20 Voith Sulzer Papiermasch Gmbh Vorrichtung und Verfahren zur Reinhaltung von Stauflächen
DE19718034A1 (de) * 1997-04-29 1998-11-05 Voith Sulzer Papiermasch Gmbh Stoffauflauf mit Dämpfungsverteiler
US6117272A (en) * 1998-09-03 2000-09-12 Voith Sulzer Papiermaschinen Device and process for metering auxiliary materials into the flow box of a paper machine
DE19926805A1 (de) * 1999-06-12 2000-12-14 Voith Sulzer Papiertech Patent Stoffauflauf mit Fluidzudosierung
DE10208610B4 (de) * 2002-02-27 2014-03-06 Voith Patent Gmbh Verfahren zum Verteilen einer Faserstoffsuspension im Stoffauflauf einer Papier- oder Kartonmaschine und Stoffauflauf
DE10233007B3 (de) * 2002-07-20 2004-04-01 Sächsisches Textilforschungsinstitut e.V. Fahrzeugsitz, vorzugsweise Autokindersitz, mit wechselbarer Auflage

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3573160A (en) * 1969-01-29 1971-03-30 Kasimir Lopas Tapered manifold stock distribution system for a papermaking machine with movable wall therein
DE2548795A1 (de) * 1975-09-30 1977-03-31 Escher Wyss Gmbh Verfahren zur herstellung eines bahnfoermigen materiales sowie maschine zur ausfuehrung des verfahrens
US4539075A (en) * 1983-01-04 1985-09-03 Oy Tampella Ab Lapintie Perforated sheet for the head box of a paper machine
WO1986001844A1 (fr) * 1984-09-19 1986-03-27 Sulzer-Escher Wyss Gmbh Systeme de caisse de tete pour machine a papier, et procede pour son utilisation
DE3741603A1 (de) * 1987-12-09 1989-06-22 Voith Gmbh J M Stoffauflauf fuer eine papiermaschine od.dgl.
EP0344941A1 (fr) * 1988-05-27 1989-12-06 Valmet-Karhula Inc. Caisse de tête hydraulique pour machine à papier ou carton
DE9115296U1 (de) * 1991-12-10 1992-03-19 J.M. Voith Gmbh, 7920 Heidenheim Stoffauflauf
WO1993009286A1 (fr) * 1991-10-29 1993-05-13 Beloit Technologies, Inc. Caisse de tete pour pate a papier
DE4239845A1 (en) * 1992-11-05 1993-05-19 Voith Gmbh J M Paper-making inlet correction - uses correlated measurements from start and end of water extraction stage to calculate the settings

Family Cites Families (5)

* 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
FI901593A (fi) † 1990-03-30 1991-10-01 Tampella Oy Ab Foerfarande vid en pappers- eller kartongmaskin foer reglering av ur inloppslaodan loepande massa samt inloppslaoda foer en papperseller kartongmaskin.
DE4019593C2 (de) † 1990-06-20 1994-01-20 Voith Gmbh J M Stoffauflauf für Papiermaschinen
DE4234940C2 (de) * 1992-10-16 1994-04-07 Voith Gmbh J M Stoffauflauf mit Flächengewichts-Querprofilregelung durch lokale Konzentrationsänderung

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3573160A (en) * 1969-01-29 1971-03-30 Kasimir Lopas Tapered manifold stock distribution system for a papermaking machine with movable wall therein
DE2548795A1 (de) * 1975-09-30 1977-03-31 Escher Wyss Gmbh Verfahren zur herstellung eines bahnfoermigen materiales sowie maschine zur ausfuehrung des verfahrens
US4539075A (en) * 1983-01-04 1985-09-03 Oy Tampella Ab Lapintie Perforated sheet for the head box of a paper machine
WO1986001844A1 (fr) * 1984-09-19 1986-03-27 Sulzer-Escher Wyss Gmbh Systeme de caisse de tete pour machine a papier, et procede pour son utilisation
DE3741603A1 (de) * 1987-12-09 1989-06-22 Voith Gmbh J M Stoffauflauf fuer eine papiermaschine od.dgl.
EP0344941A1 (fr) * 1988-05-27 1989-12-06 Valmet-Karhula Inc. Caisse de tête hydraulique pour machine à papier ou carton
WO1993009286A1 (fr) * 1991-10-29 1993-05-13 Beloit Technologies, Inc. Caisse de tete pour pate a papier
DE9115296U1 (de) * 1991-12-10 1992-03-19 J.M. Voith Gmbh, 7920 Heidenheim Stoffauflauf
DE4239845A1 (en) * 1992-11-05 1993-05-19 Voith Gmbh J M Paper-making inlet correction - uses correlated measurements from start and end of water extraction stage to calculate the settings

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996030588A1 (fr) * 1995-03-29 1996-10-03 Beloit Technologies, Inc. Systeme d'injection d'additifs dans une caisse de tete
EP0745721A2 (fr) * 1995-06-01 1996-12-04 Valmet Corporation Système d'alimentation en pâte pour une caisse de tête à plusieurs couches et procédé pour l'opération d'une telle caisse de tête
EP0745722A2 (fr) * 1995-06-01 1996-12-04 Valmet Corporation Caisse de tête pour une machine à papier ou carton
EP0745721A3 (fr) * 1995-06-01 1998-01-07 Valmet Corporation Système d'alimentation en pâte pour une caisse de tête à plusieurs couches et procédé pour l'opération d'une telle caisse de tête
EP0745722A3 (fr) * 1995-06-01 1998-01-07 Valmet Corporation Caisse de tête pour une machine à papier ou carton
US6210535B1 (en) 1995-06-01 2001-04-03 Valmet Corporation Stock feed system for a multi-layer headbox and method in the operation of a multi-layer headbox
WO1998049393A1 (fr) * 1997-04-29 1998-11-05 Beloit Technologies, Inc. Mise en forme a haute concentration de pate
EP1496151A1 (fr) * 2003-07-09 2005-01-12 Voith Paper Patent GmbH Caisse de tête
EP1496150A1 (fr) * 2003-07-09 2005-01-12 Voith Paper Patent GmbH Caisse de tête
EP1659213A3 (fr) * 2004-11-19 2006-08-23 Voith Paper Patent GmbH Caisse de tête
EP1659213A2 (fr) * 2004-11-19 2006-05-24 Voith Paper Patent GmbH Caisse de tête
WO2010069653A1 (fr) 2008-12-18 2010-06-24 Voith Patent Gmbh Caisse de tête pour machine de fabrication d'une bande de matière fibreuse
CN102216523A (zh) * 2008-12-18 2011-10-12 福伊特专利公司 用于生产纤维材料幅材的机器的流浆箱
US8221590B2 (en) 2008-12-18 2012-07-17 Voith Patent Gmbh Headbox for a machine for producing a fibrous web
US8236137B2 (en) 2008-12-18 2012-08-07 Voith Patent Gmbh Headbox for a machine for producing a fibrous web
US8236138B2 (en) 2008-12-18 2012-08-07 Voith Patent Gmbh Headbox for a machine for producing a fibrous web
CN102216523B (zh) * 2008-12-18 2014-01-01 福伊特专利公司 用于生产纤维材料幅材的机器的流浆箱
CN101838949A (zh) * 2009-03-20 2010-09-22 安德里茨库斯特斯有限责任公司 用于调节定量横向分布的造纸机上的设备
EP2230353A1 (fr) * 2009-03-20 2010-09-22 Andritz Küsters GmbH Agencement de machines à papier destiné à l'installation d'un profil transversal de grammage
CN103821023A (zh) * 2014-03-03 2014-05-28 广东石油化工学院 一种互补式布浆器
CN108166302A (zh) * 2018-01-10 2018-06-15 浙江山鹰纸业有限公司 一种用于双网纸机的流浆箱

Also Published As

Publication number Publication date
DE59408713D1 (de) 1999-10-14
EP0629739B1 (fr) 1999-09-08
DE4320243A1 (de) 1994-12-22
ATE184336T1 (de) 1999-09-15
EP0629739B2 (fr) 2006-04-19
DE4320243C2 (de) 1996-02-22

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