EP1234911A2 - Profil sens travers de la humidité - Google Patents

Profil sens travers de la humidité Download PDF

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Publication number
EP1234911A2
EP1234911A2 EP01124927A EP01124927A EP1234911A2 EP 1234911 A2 EP1234911 A2 EP 1234911A2 EP 01124927 A EP01124927 A EP 01124927A EP 01124927 A EP01124927 A EP 01124927A EP 1234911 A2 EP1234911 A2 EP 1234911A2
Authority
EP
European Patent Office
Prior art keywords
water
sections
fibrous web
web
belt
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Withdrawn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
EP01124927A
Other languages
German (de)
English (en)
Other versions
EP1234911A3 (fr
Inventor
Joachim Dr. Grabscheid
Ulrich Begemann
Oswald Satzger
Wolfgang Mayer
Ralf Rziha
Wolfgang Dr. Bamberger
Georg Dr. Kleiser
Thomas RÜHL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Paper 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 Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1234911A2 publication Critical patent/EP1234911A2/fr
Publication of EP1234911A3 publication Critical patent/EP1234911A3/fr
Withdrawn legal-status Critical Current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
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/003—Indicating or regulating the moisture content of the layer
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses

Definitions

  • the invention relates to a method and associated measuring arrangements for detection of disturbances in the moisture cross profile of a paper, cardboard, tissue or one other fibrous web in machines for producing the same, the fibrous web led by at least one water-permeable tape and that of Tape released water is collected and discharged.
  • the aim is to make fibrous webs as flat as possible
  • To create a cross-moisture profile because an even distribution of moisture forms a basis for web properties that are as constant as possible across the surface, such as printability, curl, Represents gloss and the like.
  • inductive measuring units have been developed, for example. This are however too expensive and especially when the fibrous web between two bands is too imprecise.
  • the object of the invention is therefore to be as simple and relatively accurate as possible Possibility to determine disturbances in the moisture cross profile of a fibrous web to accomplish.
  • the object with respect to the method was achieved in that the water is collected from several separate sections and the amount of water collected in each section is measured per unit of time, whereby the sections transverse to the direction of web travel only over a portion of the fibrous web extend.
  • the sections should be separated from each other be assigned to separate sections of the fibrous web. Moreover the sections should also cover the entire width for a comprehensive impression cover the fibrous web.
  • the sections can be offset in the direction of web travel or be arranged side by side.
  • the measurement results of the the sections of water collected by at least one moisture cross-profile correction unit influencing control or regulating unit are supplied.
  • the moisture cross profile correction unit should be sufficient in order to design a control loop Dimensions must be arranged before the detection of the moisture cross profile.
  • the method is particularly suitable in cases in which the fibrous web is on both sides is guided by one band and preferably both bands water permeable are executed. It is advantageous if the water released is both Tapes from sections are collected and measured.
  • the roller for example a press roller or guide roller it is possible for the roller to have a water collecting device running transversely to the web running direction in the form of a tub, gutter or the like with several, the water collecting device in sections arranged side by side transversely to the web running direction to assign dividing partitions, the one removed from the sections Amount of water per unit of time is recorded by a measuring unit.
  • Another form of implementation of the method results when the belt has a Suction device running transversely to the web running direction is guided. It is characteristic that the suction device in the form of a pipe suction device, suction box or Similar several, the suction device in the cross direction of the web next to each other has arranged dividing dividing walls, which from the sections discharged amount of water per unit of time is recorded by a measuring unit. If the fibrous web is guided on both sides by a water-permeable belt, a sectioned suction device should also be assigned to both belts.
  • Flow meters are particularly suitable as a measuring unit.
  • a control unit or Control unit for at least one moisture cross profile correction unit can be connected.
  • Moisture cross profile correction units are particularly suitable in zones Spray or spray pipes for moistening or crosswise to the web running direction Suction cup for drainage of known design. Suitable for cross-section moisture correction the zonally controllable conditioning devices of the tapes, above all of the press felt.
  • the measuring method and the associated measuring arrangements can advantageously in Shaper of a paper machine for sheet formation and / or in the press section of a Paper machine can be used for dewatering the fibrous web.
  • the permeable Bands are mostly in the former as a forming wire and in the press section formed as a press felt.
  • the fibrous web 1 is in the measuring range on both sides of each performed a water-permeable tape 2, which is the detection of the moisture cross profile makes the fibrous web 1 very difficult with conventional means.
  • the water released from the tape 2 according to the general measuring method caught and dissipated. This is done according to the invention such that the water of several, separated from each other and side by side transversely to the web running direction 4 Arranged sections 3 and the amount of water collected each section 3 is measured per unit of time.
  • Figure 1 shows a possible measuring arrangement in which the fibrous web 1 with a water-absorbing press felt 16 on both sides by one of two press rollers 11 formed nip is performed.
  • An example of this is the detection of a belt 2 in the form of the upper press felts 16 delivered amount of water shown. This is done using a water collector 8 in the form of a trough which the upper press roller 11 at the outlet of Press nip is assigned. The water collecting device 8 takes that from Volume 2 delivered to the upper press roller 11 and thrown off from there on.
  • the water collecting device 8 is gem. Figure 2 over partitions 9 in several sections 3 arranged side by side divided. Furthermore, the amount of water discharged from each section 3 by a measuring unit 10 in the form of a Flow meter detected.
  • a large amount of water in a section 3 indicates a low moisture content in the corresponding section of the fibrous web 1 and vice versa. This results from the assumption that the fibrous web 1 at the beginning of the paper machine has a flat moisture cross profile.
  • the measurement results with regard to the amounts of water collected by the sections 3 are transmitted to a control and regulating unit 6. From there it can Moisture cross profile can be influenced via moisture cross profile correction units 5.
  • the upper press felt 16 is guided away and the only one Continuation of the fibrous web 1 on the lower press felt 16.
  • a moisture cross profile correction unit 5 Opposite the side of the fibrous web 1 facing the lower press felt 16 there is a moisture cross profile correction unit 5 in the form of in zones across to Web direction 4 controllable spray tube 13 for water vapor.
  • This spray tube 13 is influenced by the control and regulating unit 6 and serves to moisten the too dry sections of the fibrous web 1.
  • the vacuumed roller divided into several zones arranged next to each other across the web running direction 4, whose vacuum can be controlled separately. This allows zone-by-zone control of the Drainage of the fibrous web 1 through the forming wire 15.
  • the forming wire 15 then passes the fibrous web 1 to the upper press felt 16 of the press nip.
  • FIG. 3 shows the common deflection of the fibrous web 1 with one on each side water-permeable tape 2 in the form of a press felt 16. This is from the wrapped roller 7 picked up and thrown by it again Water is collected by a sectioned water collecting device 8. Here too the amount of water collected by the sections 3 is measured.
  • FIG 4 shows a measuring arrangement in a former, the fibrous web 1 on both sides guided by a water-permeable band 2 in the form of a forming wire 15 becomes.
  • a band 2 is sectioned on a partition 9 Suction device 12 passed.
  • the negative pressure prevailing in sections 3 causes the fibrous web 1 to be dewatered by the corresponding belt 2 therethrough.

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  • Paper (AREA)
EP01124927A 2001-02-22 2001-10-19 Profil sens travers de la humidité Withdrawn EP1234911A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10108517A DE10108517A1 (de) 2001-02-22 2001-02-22 Feuchtequerprofil
DE10108517 2001-02-22

Publications (2)

Publication Number Publication Date
EP1234911A2 true EP1234911A2 (fr) 2002-08-28
EP1234911A3 EP1234911A3 (fr) 2003-12-10

Family

ID=7675104

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01124927A Withdrawn EP1234911A3 (fr) 2001-02-22 2001-10-19 Profil sens travers de la humidité

Country Status (3)

Country Link
US (1) US6655195B2 (fr)
EP (1) EP1234911A3 (fr)
DE (1) DE10108517A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10305606A1 (de) * 2003-02-11 2004-08-19 Voith Paper Patent Gmbh Maschine zur Herstellung einer Faserstoffbahn
US7811417B2 (en) * 2005-12-30 2010-10-12 Honeywell Asca, Inc. Cross-machine direction actuators for machine clothing
DE102009054097A1 (de) * 2009-11-12 2011-05-19 Paul Hartmann Aktiengesellschaft Verfahren zum Bestimmen der Feuchtigkeit bei einem absorbierenden Hygienartikel und Vorrichtung zur Durchführung des Verfahrens
US9481777B2 (en) 2012-03-30 2016-11-01 The Procter & Gamble Company Method of dewatering in a continuous high internal phase emulsion foam forming process
US9354090B2 (en) * 2013-05-22 2016-05-31 Honeywell Limited Scanning sensor arrangement for paper machines or other systems
US9796274B2 (en) 2013-05-22 2017-10-24 Honeywell Limited Power delivery system for providing power to sensor head of paper machine or other system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0279743A2 (fr) * 1987-02-17 1988-08-24 Measurex Corporation Capteur d'humidité à compensation de température
EP0432571A2 (fr) * 1989-12-12 1991-06-19 Valmet Paper Machinery Inc. Rouleau aspirant pour une machine à papier et un procédé pour la réalisation d'un profil de pression désiré pour un rouleau aspirant
US5879513A (en) * 1994-10-12 1999-03-09 Ecopump Oy Method and apparatus for the drainage of the wire and/or press section of a paper machine
US6126785A (en) * 1998-04-24 2000-10-03 Honeywell-Measurex Corporation System and method for sheet measurement and control in papermaking machine
EP1101862A2 (fr) * 1999-11-16 2001-05-23 Voith Paper Patent GmbH Dispositif de pressage
DE10025240A1 (de) * 2000-05-22 2001-11-29 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Feuchtequerprofil-Korrektur
DE10055999A1 (de) * 2000-11-11 2002-05-23 Voith Paper Patent Gmbh Pressanordnung

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1070490B (fr) * 1959-12-03
DE355958C (de) * 1920-02-25 1922-07-10 Karlstads Mek Verkst Ab Walzenpresse zum Auspressen von Fluessigkeit aus Faserstoffbahnen
US3296710A (en) * 1965-07-15 1967-01-10 Rice Barton Corp Absorbent dryer
US3574261A (en) * 1968-09-24 1971-04-13 Grace W R & Co Apparatus and method for drying permeable webs
DE2355543B2 (de) * 1973-11-07 1979-03-15 Hoechst Ag, 6000 Frankfurt Verfahren zum kontinuierlichen Trocknen von Textilbahnen
US5049216A (en) * 1989-05-31 1991-09-17 Measurex Corporation Warp control apparatus and method for sheet material
DE4318036C1 (de) * 1993-05-29 1994-07-28 Voith Gmbh J M Presseneinheit einer Papiermaschine zur Herstellung von Tissuepapier
DE19630190A1 (de) * 1996-07-26 1998-01-29 Voith Sulzer Papiermasch Gmbh Verfahren und Vorrichtung zur Konditionierung eines Filzes in einer Papiermaschine
US5851358A (en) * 1997-04-08 1998-12-22 Voith Sulzer Paper Technology North America, Inc. Paper making machine with an integral suction chamber and air/water separator for a doctor element
EP0897092A1 (fr) * 1997-08-08 1999-02-17 Voith Sulzer Papiertechnik Patent GmbH Séchage à condensation
DE19934875A1 (de) * 1999-07-24 2001-01-25 Voith Paper Patent Gmbh Papiermaschine
DE20000599U1 (de) * 2000-01-14 2000-05-11 Voith Sulzer Papiertechnik Patent GmbH, 89522 Heidenheim Wasserabführeinrichtung
ATE386153T1 (de) * 2000-01-14 2008-03-15 Voith Patent Gmbh Wasserabführeinrichtung
DE10055708A1 (de) * 2000-11-10 2002-05-16 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Entwässerung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0279743A2 (fr) * 1987-02-17 1988-08-24 Measurex Corporation Capteur d'humidité à compensation de température
EP0432571A2 (fr) * 1989-12-12 1991-06-19 Valmet Paper Machinery Inc. Rouleau aspirant pour une machine à papier et un procédé pour la réalisation d'un profil de pression désiré pour un rouleau aspirant
US5879513A (en) * 1994-10-12 1999-03-09 Ecopump Oy Method and apparatus for the drainage of the wire and/or press section of a paper machine
US6126785A (en) * 1998-04-24 2000-10-03 Honeywell-Measurex Corporation System and method for sheet measurement and control in papermaking machine
EP1101862A2 (fr) * 1999-11-16 2001-05-23 Voith Paper Patent GmbH Dispositif de pressage
DE10025240A1 (de) * 2000-05-22 2001-11-29 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Feuchtequerprofil-Korrektur
DE10055999A1 (de) * 2000-11-11 2002-05-23 Voith Paper Patent Gmbh Pressanordnung

Also Published As

Publication number Publication date
EP1234911A3 (fr) 2003-12-10
US20020112532A1 (en) 2002-08-22
US6655195B2 (en) 2003-12-02
DE10108517A1 (de) 2002-08-29

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