EP0821101B1 - Dispositif d'humidification - Google Patents

Dispositif d'humidification Download PDF

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Publication number
EP0821101B1
EP0821101B1 EP97108427A EP97108427A EP0821101B1 EP 0821101 B1 EP0821101 B1 EP 0821101B1 EP 97108427 A EP97108427 A EP 97108427A EP 97108427 A EP97108427 A EP 97108427A EP 0821101 B1 EP0821101 B1 EP 0821101B1
Authority
EP
European Patent Office
Prior art keywords
moistening
drying
web
liquid
material web
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.)
Expired - Lifetime
Application number
EP97108427A
Other languages
German (de)
English (en)
Other versions
EP0821101A3 (fr
EP0821101A2 (fr
Inventor
Herbert Kotitschke
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 EP0821101A2 publication Critical patent/EP0821101A2/fr
Publication of EP0821101A3 publication Critical patent/EP0821101A3/fr
Application granted granted Critical
Publication of EP0821101B1 publication Critical patent/EP0821101B1/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
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/04—Paper-break control devices

Definitions

  • the invention relates to a moistening device for a machine for manufacturing a material web according to the preamble of the claim. 1. Also concerns the Invention a method for moistening a conveyor belt a Drying section with at least one machine comprising a drying cylinder Production of a material web according to the preamble of claim 8.
  • Moisturizing devices serve to increase the moisture content of the paper web influence and to protect the conveyor belt from thermal damage.
  • the object of the invention is therefore a moistening device and a method of moistening to create a conveyor belt that has these disadvantages do not have.
  • the humidifier is characterized by the fact that it is characterized by a Control device is activated in the event of a web break, so that moisture led up to the drying cylinders and thus affects their surface temperature becomes.
  • a Control device is activated in the event of a web break, so that moisture led up to the drying cylinders and thus affects their surface temperature becomes.
  • the control device controls that of the humidification device amount of liquid applied depending on the temperature of the drying cylinders.
  • the surface temperature the drying cylinder on one desired value is adjustable and one sets the desired moisture profile of the material web.
  • the humidifier which is characterized by that the spread over the width of the machine Amount of liquid is variable. It is with it possible in the peripheral areas of the drying cylinders set a lower temperature and thus a To avoid over-drying of the edges of the material web. This leads to a particularly uniform moisture cross profile and to avoid tension within the web that would otherwise result in web breaks could lead.
  • Humidification device which is characterized by that they have a liquid discharge device includes, which is assigned to the conveyor belt and this moistened.
  • the moistening device can preferably the returning run of the conveyor belt are assigned and is therefore outside the Area located, which at a train demolition material falling out of the dryer section is exposed. So it can be particularly on the liquid discharge devices do not deposit material residues, which have a uniform liquid discharge and to influence the moistening of the conveyor belt could.
  • the in Claim 8 includes process steps.
  • the process is characterized in that the moistening device especially in the event of a web break is activated so that the temperature of the drying cylinder is adjustable. It can be a desired one Moisture profile of the material web can be set.
  • the one from the Amount of liquid applied is dependent on the temperature of the drying cylinder- adjustable.
  • the process is particularly sensitive to temperature changes adjustable within the dryer section, see above that the moisture profile of the material web is very predictable or is determinable
  • One embodiment is particularly preferred of the procedure, which is characterized in that the spread over the width of the conveyor belt
  • the amount of liquid is controllable. So for example it is possible in the edge areas of the conveyor belt to apply more liquid to accordingly the edge areas of the drying cylinders to cool more. It can over-dry the edge areas of the material web and uneven Web tension can be prevented.
  • the outline sketch shows a single-tier dryer group 1 with a number of drying cylinders 3, 5, 7 and 9, whose centers in an imaginary first Level E1 are arranged.
  • a first Level E1 In the area of the gaps between two successive ones Drying cylinders 11, 13 and 15 are provided guide rollers, their centers in an imaginary second level E2 are arranged at a distance to the first level and parallel to it runs.
  • a Conveyor belt 17 guided in a meandering shape. It will via a deflection roller 19 to the first drying cylinder 3 applied and via a deflection roller 21 from the last drying cylinder 9 of drying group 1 decreased. Via suitable further deflection rollers 23, 25, 27 and 29, the conveyor belt 17 becomes the first Drying cylinder 3 returned. It is hinted at here that the conveyor belt, for example, in the area the pulleys 25 and 27 are tensioned can.
  • a moistening device 33 is provided which here a liquid discharge device comprising at least one tube 35 having.
  • the pipe 35 preferably extends over the entire width the manufacturing machine, not shown here a web of material, especially over the Width of the conveyor belt 17.
  • the tube 35 is open its side facing the strand 31 with nozzle openings provided from which liquid is applied and can be sprayed onto the conveyor belt.
  • the moistening device 33 also has a Control device 36 on the liquid discharge device respectively on that Tube 35 acts. This is dashed here shown control line S indicated.
  • the Control device 36 may preferably be on here act valve devices, not shown, with the help of the amount of liquid supplied to the tube 35 is adjustable.
  • the humidifier 33 is designed so that the over Width of drying group 1 or Conveyor belt 17 dispensed amount of liquid can be varied. For example, it is possible to design individual nozzles of the tube 35 variably or different across the width of the Conveyor belt 17 distributed pipe sections with different To apply liquid amounts.
  • the humidifier 33 is here with one not shown liquid reservoir connected and comprises at least one supply pump, the the pipe 35 with an excess pressure Liquid supplied.
  • the liquid fed to the pipe can, as I said, via valve devices be dosed. It is also possible to use the Control device 36 the pump power and thus to vary the liquid volume flow. Possibly several pumps can also be provided be the different across the width of the Supply dryer section 1 distributed pipe sections. Finally, it is conceivable that in the area of returning strand 31 several liquid discharge devices or pipes 35 at a distance be provided to each other.
  • At least one of the drying cylinders is a temperature sensor T assigned, the output signal of the Control device 36 supplied via a line L. becomes.
  • the control device 36 is designed that the amount of liquid dispensed is dependent varies from the temperature of the drying cylinder becomes.
  • the drying cylinder 3, 5, 7 and 9 becomes the material web 37 performed in the guide rollers 11, 13 and 15 rests on the outside of the conveyor belt 17.
  • the guide rollers are preferably vacuumed. Suction devices are known, so here is not discussed in more detail.
  • the control device 36 can be running Operation via the humidifier 33 that Moisture profile, especially the moisture cross profile adjust the material web 37.
  • the control device 36 is in particular designed such that if the web breaks, the humidifier 33 activated so that cooling of the Drying cylinders 3, 5, 7 and 9 even after the wet web of material 37, the drying cylinder cools through a suitably moistened conveyor belt 17 is ensured. In this way the temperature of the Drying cylinders 3, 5, 7 and 9 to a desired one Value remain set so that immediately after threading the material web 37 into the dryer section 1 a desired moisture profile of the material web 37 sets.
  • control device 36 is designed in this way is that different areas of the tube 35th or whose nozzles can be specifically controlled, can also a moisture cross profile of the conveyor belt 17th and thus a temperature cross profile of the drying cylinders 3, 5, 7 and 9 set at a web break that, as mentioned above, become a defined one Moisture cross profile of the material web 37 at after restarting dryer section 1 a web break.
  • the procedure for moistening a conveyor belt is characterized in that the moistening device 33 activated when the web of material 37 tears becomes. This ensures that the Temperature of drying cylinders 3, 5, 7 and 9 too if the material web 37 is omitted, which is due to their drying cylinders in operation the machine cools, kept at a desired value can be. It is possible to do the necessary To determine the amount of liquid empirically. However, the amount is preferably dependent set by the temperature of the drying cylinder. To the temperature of the drying cylinder too can detect at least one temperature sensor T be provided.
  • a temperature cross profile of the drying cylinder (s) capture and thus also a moisture cross profile of the conveyor belt 17 with the help of the control device 36 and the tube 35 to specify.
  • the humidifier 33 not just related can be used with single-tier dryer groups 1. It It is very possible to use such humidifiers also to be provided for double-tier dryer groups and the upper and / or lower Conveyor belt of the drying group separate humidification devices assigned.
  • the associated Control device can be designed so that the temperatures of the top and bottom rows of the Drying cylinders are detected separately, creating a Moisture profile or a moisture cross profile of the upper and lower conveyor belt separately adjustable is.

Landscapes

  • Paper (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Drying Of Solid Materials (AREA)

Claims (9)

  1. Machine pour la fabrication d'une bande de matériau, en particulier d'une bande de papier ou de carton, comprenant une section sèche, qui présente un certain nombre de cylindres de séchage et de rouleaux conducteurs, autours desquels la bande de matériau est guidée en forme de méandres avec une bande transporteuse, un dispositif de commande (36) activant un dispositif d'humidification (33) pour humidifier la bande transporteuse en vue de refroidir les cylindres de séchage (3, 5, 7, 9) dans le cas d'une rupture de la bande de matériau (37), caractérisée en ce que la quantité de liquide appliquée par le dispositif d'humidification (33) est régulée en fonction de la température des cylindres de séchage (3, 5, 7, 9).
  2. Machine selon la revendication 1, caractérisée en ce que le dispositif de commande (36) influence la quantité de liquide déchargée par le dispositif d'humidification (33).
  3. Machine selon la revendication 1 ou 2, caractérisée en ce que le dispositif de commande (36) est conçu de telle sorte que la quantité de liquide déchargée sur toute la largeur du groupe de séchage (1) soit variable.
  4. Machine selon la revendication 3, caractérisée en ce que le dispositif d'humidification (33) comprend au moins un dispositif de décharge de liquide s'étendant sur toute la largeur du groupe de séchage (1).
  5. Machine selon la revendication 4, caractérisée en ce que le dispositif de décharge de liquide présente un tube (35) pourvu d'au moins une ouverture de buse.
  6. Machine selon la revendication 4 ou 5, caractérisée en ce que le dispositif de décharge de liquide est associé à la bande transporteuse (17) et humidifie cette dernière.
  7. Machine selon l'une quelconque des revendications 4 à 6, caractérisée en ce que le dispositif de décharge de liquide est associé au tronçon de retour (31) de la bande transporteuse (17).
  8. Procédé d'humidification d'une bande transporteuse d'une machine pour la fabrication d'une bande de matériau, en particulier d'une bande de papier ou de carton comprenant une section sèche avec au moins un cylindre de séchage, au moyen d'un dispositif d'humidification, le dispositif d'humidification (33) étant activé dans le cas d'une rupture de la bande en vue de refroidir les cylindres de séchage (3, 5, 7, 9), caractérisé en ce que la quantité de liquide appliquée par le dispositif d'humidification (33) peut être ajustée en fonction de la température du cylindre de séchage.
  9. Procédé selon la revendication 8, caractérisé en ce que le dispositif d'humidification (33) peut être ajusté de telle sorte que la quantité de liquide déchargée sur toute la largeur de la bande transporteuse (17) peut être régulée.
EP97108427A 1996-07-27 1997-05-24 Dispositif d'humidification Expired - Lifetime EP0821101B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19630446A DE19630446A1 (de) 1996-07-27 1996-07-27 Befeuchtungseinrichtung
DE19630446 1996-07-27

Publications (3)

Publication Number Publication Date
EP0821101A2 EP0821101A2 (fr) 1998-01-28
EP0821101A3 EP0821101A3 (fr) 1999-03-03
EP0821101B1 true EP0821101B1 (fr) 2003-05-02

Family

ID=7801093

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97108427A Expired - Lifetime EP0821101B1 (fr) 1996-07-27 1997-05-24 Dispositif d'humidification

Country Status (4)

Country Link
US (1) US5862608A (fr)
EP (1) EP0821101B1 (fr)
CA (1) CA2211577A1 (fr)
DE (2) DE19630446A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10042243A1 (de) * 2000-08-28 2002-03-14 Voith Paper Patent Gmbh Verfahren zur Bahnrißüberwachung
DE10131281A1 (de) * 2001-06-28 2003-01-09 Voith Paper Patent Gmbh Bahnüberwachung
DE102004046795A1 (de) * 2004-09-27 2006-04-06 Voith Paper Patent Gmbh Einrichtung und Verfahren zur Überwachung des Überführens einer Materialbahn und speziell der Verbreiterung der Breite eines Überführstreifens auf einen Abriss des Überführstreifens oder der Materialbahn
US7958322B2 (en) * 2005-10-25 2011-06-07 Waratek Pty Ltd Multiple machine architecture with overhead reduction
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
US9286118B2 (en) 2012-06-15 2016-03-15 Freescale Semiconductor, Inc. System and method for improved job processing to reduce contention for shared resources
US9772303B2 (en) * 2015-01-12 2017-09-26 Ecolab Usa Inc. Apparatus for, system for and methods of maintaining sensor accuracy
US11816893B1 (en) 2022-08-03 2023-11-14 Industrial Video Solutions Inc. Systems and methods for monitoring and controlling industrial processes
US11932991B2 (en) * 2022-08-03 2024-03-19 Industrial Video Solutions Inc. Systems and methods for monitoring and controlling industrial processes

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2020056A (en) * 1932-10-11 1935-11-05 Norman B Gibbs Automatic control for paper machine driers
SE429771B (sv) * 1978-09-25 1983-09-26 Nordiskafilt Ab Sett att reglera fuktprofilen hos en fiberbana
SE8205095D0 (sv) * 1982-09-08 1982-09-08 Infraroedteknik Ab Sett att vermebehandla en kontinuerlig materialbana, i synnerhet torkning av en pappersbana, och anordning for genomforande av settet
US5015336A (en) * 1989-10-31 1991-05-14 Beloit Corporation Felt turning suction roll
DE3938478A1 (de) * 1989-11-20 1991-05-23 Koenig & Bauer Ag Vorrichtung zum verhindern von maschinenschaeden
DE4037661C1 (fr) * 1990-11-27 1991-12-19 J.M. Voith Gmbh, 7920 Heidenheim, De
DE4038250C1 (fr) * 1990-11-30 1992-01-30 J.M. Voith Gmbh, 7920 Heidenheim, De
SE9100577L (sv) * 1991-02-28 1992-03-16 Scandiafelt Ab Rundvaevd formningsvira till oevervaegande del bestaaende av polyamidtraadar
US5147508A (en) * 1991-10-11 1992-09-15 The Nash Engineering Company Suction box covers for cleaning papermaking machine felts
FI94780C (fi) * 1993-01-29 1995-10-25 Valmet Paper Machinery Inc Paperikoneen kudoksen kiristyslaite
US5377428A (en) * 1993-09-14 1995-01-03 James River Corporation Of Virginia Temperature sensing dryer profile control
DE4339766C1 (de) * 1993-11-23 1995-02-09 Koenig & Bauer Ag Vorrichtung zum Verhindern von Schäden bei Rissen von Warenbahnen
US5595632A (en) * 1994-02-01 1997-01-21 James Ross Limited Shower for paper making machine
US5569358A (en) * 1994-06-01 1996-10-29 James River Corporation Of Virginia Imprinting felt and method of using the same
DE9414963U1 (de) * 1994-09-16 1994-11-03 J.M. Voith Gmbh, 89522 Heidenheim Trockenpartie

Also Published As

Publication number Publication date
EP0821101A3 (fr) 1999-03-03
DE19630446A1 (de) 1998-01-29
US5862608A (en) 1999-01-26
CA2211577A1 (fr) 1998-01-27
EP0821101A2 (fr) 1998-01-28
DE59709952D1 (de) 2003-06-05

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