EP0821101A2 - Dispositif d'humidification - Google Patents

Dispositif d'humidification Download PDF

Info

Publication number
EP0821101A2
EP0821101A2 EP97108427A EP97108427A EP0821101A2 EP 0821101 A2 EP0821101 A2 EP 0821101A2 EP 97108427 A EP97108427 A EP 97108427A EP 97108427 A EP97108427 A EP 97108427A EP 0821101 A2 EP0821101 A2 EP 0821101A2
Authority
EP
European Patent Office
Prior art keywords
web
conveyor belt
drying
moistening
liquid
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
EP97108427A
Other languages
German (de)
English (en)
Other versions
EP0821101B1 (fr
EP0821101A3 (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 Sulzer Papiermaschinen GmbH
Voith Sulzer Papiertechnik 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 Sulzer Papiermaschinen GmbH, Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Sulzer Papiermaschinen 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 humidification device for a machine for producing a material web according to the preamble of claim 1.
  • the invention relates to a method for moistening a conveyor belt a dryer section with at least one drying cylinder Machine for the production of a material web according to Preamble of claim 9.
  • 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.
  • a humidifier is used to solve this problem proposed that in claim 1 Features mentioned.
  • the humidifier is characterized by the fact that a control device activated in a web break is so that moisture up to the drying cylinders led and thus their surface temperature being affected. It is particularly possible a given due to the lack of material web to avoid undefined heating of the drying cylinders, so that after reinserting the torn Material web a defined temperature the drying cylinder is set, causing sets a desired moisture cross profile.
  • An embodiment of the moistening device is preferred, which is characterized in that the control device that of the humidification device amount of liquid dispensed depending on the temperature of the drying cylinders controls. This embodiment ensures that the surface temperature of the drying cylinder can be set to a desired value and a desired moisture profile Material web.
  • Humidification device 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 edge areas of the drying cylinder set a lower temperature and so to avoid over-drying of the edges of the material web. This leads to a particularly uniform Moisture cross profile and to avoid Tensions within the web that would otherwise arise could cause web breaks.
  • Humidification device which is characterized by that they have a liquid discharge device comprises, which is assigned to the conveyor belt and this moisturizes.
  • the humidifier can preferably the returning run of the conveyor belt be assigned and is therefore outside of the area which is the one in a web demolition exposed material falling out of the dryer section is. So it can be particularly on the Liquid discharge devices no material residues deposit that even liquid discharge and thus moistening the conveyor belt could influence.
  • the in claim 9 mentioned process steps includes.
  • the procedure is characterized in that the moistening device activated especially in the event of a web break is 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.
  • An embodiment of the method is preferred, which is characterized in that the humidifier amount of liquid applied - preferably depending on the temperature of the drying cylinder is adjustable.
  • the process is particularly sensitive to changes in temperature adjustable within the dryer section, so that the moisture profile of the material web very predictable or determinable is.
  • An embodiment of the Procedure which is characterized in that the spread over the width of the conveyor belt Amount of liquid is controllable. So for example it is possible in the peripheral areas of the Conveyor belt to apply more liquid around 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.
  • Drying cylinders are provided with guide rollers 11, 13 and 15, 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 pipe 35 having.
  • the pipe 35 preferably extends over the entire width the machine for manufacturing, 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 one 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 can 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.
  • the Control device 36 the pump power and thus to vary the liquid volume flow.
  • several pumps can also be provided be the different across the width of the Supply dryer section 1 distributed pipe sections.
  • 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 such that that the amount of liquid dispensed depends 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 in progress 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 damp web of material 37, the drying cylinder cools through a suitably moistened conveyor belt 17 is ensured. In this way can 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 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 is very possible, such humidification devices also to be provided for double-tier dryer groups and the upper and / or lower Conveyor belt of the drying group separate humidification devices assign.
  • the relatives can 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)
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 true EP0821101A2 (fr) 1998-01-28
EP0821101A3 EP0821101A3 (fr) 1999-03-03
EP0821101B1 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
US11932991B2 (en) * 2022-08-03 2024-03-19 Industrial Video Solutions Inc. Systems and methods for monitoring and controlling industrial processes
US11846930B1 (en) 2022-08-03 2023-12-19 Industrial Video Solutions Inc. Systems and methods for monitoring and controlling industrial processes

Citations (2)

* 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
US4474643A (en) * 1978-09-25 1984-10-02 Albany International Corp. Method for controlling the moisture content of a fiber web and apparatus for accomplishing the method and a paper making machine for accomplishing the method and a paper making machine with an apparatus for accomplishing the method

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
SE466659B (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

Patent Citations (2)

* 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
US4474643A (en) * 1978-09-25 1984-10-02 Albany International Corp. Method for controlling the moisture content of a fiber web and apparatus for accomplishing the method and a paper making machine for accomplishing the method and a paper making machine with an apparatus for accomplishing the method

Also Published As

Publication number Publication date
EP0821101B1 (fr) 2003-05-02
US5862608A (en) 1999-01-26
DE59709952D1 (de) 2003-06-05
CA2211577A1 (fr) 1998-01-27
EP0821101A3 (fr) 1999-03-03
DE19630446A1 (de) 1998-01-29

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