EP0903437A2 - Process for reducing the adhesion between a wet fibrous web and a rotating roller - Google Patents

Process for reducing the adhesion between a wet fibrous web and a rotating roller Download PDF

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Publication number
EP0903437A2
EP0903437A2 EP98112932A EP98112932A EP0903437A2 EP 0903437 A2 EP0903437 A2 EP 0903437A2 EP 98112932 A EP98112932 A EP 98112932A EP 98112932 A EP98112932 A EP 98112932A EP 0903437 A2 EP0903437 A2 EP 0903437A2
Authority
EP
European Patent Office
Prior art keywords
fibrous web
roller
adhesion
web
rotating roller
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Withdrawn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
EP98112932A
Other languages
German (de)
French (fr)
Other versions
EP0903437A3 (en
Inventor
Martin Dr. Kustermann
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 EP0903437A2 publication Critical patent/EP0903437A2/en
Publication of EP0903437A3 publication Critical patent/EP0903437A3/en
Withdrawn legal-status Critical Current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
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • 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
    • 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
    • D21F3/0272—Wet presses in combination with suction or blowing devices

Definitions

  • the invention relates to a method and its application for reducing liability a damp paper, textile or other fibrous web on a rotating roller.
  • the object of the invention is therefore to develop a method and its application, with which the adhesion of the fibrous web to a rotating roller is reduced.
  • the object was achieved in that between the roller and the Fibrous web a vapor cushion is generated.
  • the steam cushion can be generated by the roller being at a very high level Temperature is heated. This temperature is higher than it is for the technological one Process is required. The temperature of the surface of the roller should be above 120 ° C to be heated.
  • the method should preferably be used in a part of the machine, in which the temperature of the fibrous web below 70 ° C and / or the dry content of the fibrous web is below 60%. This is essentially due to the fact that in this Area of liability is particularly large. At least some of these conditions are in Press sections for dewatering or drying sections for drying fibrous webs given.
  • the figure shows part of a press section in which the fibrous web 1 together with an endless drainage felt 2 through a press nip is led.
  • the press nip is formed by two rollers 4 and 5.
  • it is heated to the highest possible temperature, which leads to the evaporation of a Part of the water of the fibrous web and thus to form a vapor cushion between the fibrous web 1 and the roller 4 leads.
  • Different heating systems can be used are used, for example electrical or based on hot oil.
  • the inlet gap between the roller 4 and the fibrous web 1 becomes hotter Steam is blown in through a steam blower box. This increases the vapor cushion.
  • a corresponding arrangement is also possible in dryer sections, where the heated drying cylinders are wrapped in the fibrous web 1.
  • the cylinders are heated to a temperature higher than that required for drying and for others can of course also the steam blow boxes 3 in the inlet gap between the fibrous web 1 and the drying cylinder can be arranged.
  • the procedure is an advantage can be used where the temperature of the fibrous web 1 below 70 ° C and / or the dry content the fibrous web 1 is below 60%, the application of the method can often to the beginning of the dryer section or the beginning of a drying section, if e.g. B. in a size press or the like a strong rewetting has taken place.

Landscapes

  • Paper (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

A steam cushion is formed between a fiber web (1) and a rotating roller (4). The roller (4) is heated to temperature higher than that required to dry the web (1) or for extracting water from it, giving a roller surface temp. of ≥ 120 degrees C. Steam is blown into the entry gap between the roller (4) and the web (1), the web (1) temp. being ≤ 70 degrees C and having a dry matter content of ≤ 60 %.

Description

Die Erfindung betrifft ein Verfahren und deren Anwendung zur Veringerung der Haftung einer feuchten Papier-, Textil- oder anderen Faserstoffbahn an einer rotierenden Walze.The invention relates to a method and its application for reducing liability a damp paper, textile or other fibrous web on a rotating roller.

Wegen der immer schneller werdenden Geschwindigkeiten von Maschinen zur Herstellung und/oder Veredelung von Faserstoffbahnen erlangt die Haftung der feuchten Faserstoffbahn an der glatten Oberfläche rotierender Walzen eine zunehmende Bedeutung. Die für das Abziehen der Faserstoffbahn von der Walze erforderlichen Kräfte beanspruchen die Faserstoffbahn zunehmend und können sogar zum Abriß führen.Because of the ever faster speeds of manufacturing machines and / or refinement of fibrous webs gains adhesion of the moist fibrous web of increasing importance on the smooth surface of rotating rollers. The for the removal of the fibrous web from the roll required forces that Fibrous web increasingly and can even lead to demolition.

Die Aufgabe der Erfindung ist es daher, ein Verfahren und dessen Anwendung zu entwickeln, mit dem die Haftung der Faserstoffbahn an einer rotierenden Walze verringert wird.The object of the invention is therefore to develop a method and its application, with which the adhesion of the fibrous web to a rotating roller is reduced.

Erfindungsgemäß wurde die Aufgabe dadurch gelöst, daß zwischen der Walze und der Faserstoffbahn ein Dampfpolster erzeugt wird.According to the invention the object was achieved in that between the roller and the Fibrous web a vapor cushion is generated.

Da das Dampfpolster einen direkten Kontakt der Faserstoffbahn an der Walze vermindert oder sogar verhindert, verringern sich die für das Abziehen der Faserstoffbahn von der Walze erforderlichen Kräfte wesentlich.Since the steam cushion reduces direct contact of the fibrous web on the roller or even prevents, the pulling of the fibrous web from the Roll essential forces essential.

Dabei läßt sich das Dampfpolster dadurch erzeugen, daß die Walze auf eine sehr hohe Temperatur aufgeheizt wird. Diese Temperatur ist höher als es für den technologischen Prozeß erforderlich ist. Die Temperatur der Oberfläche der Walze sollte auf Werte von über 120 °C aufgeheizt werden. The steam cushion can be generated by the roller being at a very high level Temperature is heated. This temperature is higher than it is for the technological one Process is required. The temperature of the surface of the roller should be above 120 ° C to be heated.

Es ist jedoch in Verbindung mit der Beheizung der Walze oder für sich allein auch möglich, das Dampfpolster dadurch zu erzeugen, daß in den Einlaufspalt zwischen der Walze und der Faserstoffbahn heißer Dampf eingeblasen wird.However, in connection with the heating of the roller or on its own, it is also possible to generate the steam cushion in that in the inlet gap between the roller and hot steam is blown into the fibrous web.

Die Anwendung des Verfahrens sollte vorzugsweise in einem Teil der Maschine erfolgen, in dem die Temperatur der Faserstoffbahn unter 70 °C und/oder der Trockengehalt der Faserstoffbahn unter 60 % liegt. Dies begründet sich im wesentlichen darin, daß in diesem Bereich die Haftung besonders groß ist. Zumindest teilweise sind diese Bedingungen in Pressenpartien zur Entwässerung oder Trockenpartien zur Trocknung von Faserstoffbahnen gegeben.The method should preferably be used in a part of the machine, in which the temperature of the fibrous web below 70 ° C and / or the dry content of the fibrous web is below 60%. This is essentially due to the fact that in this Area of liability is particularly large. At least some of these conditions are in Press sections for dewatering or drying sections for drying fibrous webs given.

Nachfolgend soll die Erfindung an einem Ausführungsbeispiel näher erläutert werden. In der beigefügten Zeichnung zeigt die Figur einen Teil einer Pressenpartie, bei der die Faserstoffbahn 1 gemeinsam mit einem endlosen Entwässerungsfilz 2 durch einen Preßspalt geführt ist. Der Preßspalt wird dabei von zwei Walzen 4 und 5 gebildet. Um die Haftung der Faserstoffbahn 1 an der glatten Oberfläche der Walze 4 zu verringern, wird diese auf eine möglichst hohe Temperatur aufgeheizt, was zur Verdampfung eines Teiles des Wassers der Faserstoffbahn und damit zur Bildung eines Dampfpolsters zwischen der Faserstoffbahn 1 und der Walze 4 führt. Dabei können verschiedene Heizsysteme zur Anwendung kommen, beispielsweise elektrische oder auf der Basis von heißem Öl. Außerdem wird in den Einlaufspalt zwischen der Walze 4 und der Faserstoffbahn 1 heißer Dampf über einen Dampfblaskasten eingeblasen. Dies vergrößert das Dampfpolster.The invention will be explained in more detail below using an exemplary embodiment. In In the accompanying drawing, the figure shows part of a press section in which the fibrous web 1 together with an endless drainage felt 2 through a press nip is led. The press nip is formed by two rollers 4 and 5. In order to reduce the adhesion of the fibrous web 1 to the smooth surface of the roller 4, it is heated to the highest possible temperature, which leads to the evaporation of a Part of the water of the fibrous web and thus to form a vapor cushion between the fibrous web 1 and the roller 4 leads. Different heating systems can be used are used, for example electrical or based on hot oil. In addition, the inlet gap between the roller 4 and the fibrous web 1 becomes hotter Steam is blown in through a steam blower box. This increases the vapor cushion.

Eine entsprechende Anordnung ist auch in Trockenpartien möglich, wo die beheizten Trockenzylinder von der Faserstoffbahn 1 umschlungen werden. Zum einen können die Zylinder auf eine höhere als für die Trocknung erforderliche Temperatur beheizt werden und zum anderen können natürlich auch die Dampfblaskästen 3 im Einlaufspalt zwischen der Faserstoffbahn 1 und dem Trockenzylinder angeordnet werden. Da das Verfahren mit Vorteil dort einsetzbar ist, wo die Temperatur der Faserstoffbahn 1 unter 70°C und/oder der Trockengehalt der Faserstoffbahn 1 unter 60 % liegt, kann sich die Anwendung des Verfahrens oft auf den Anfangsbereich der Trockenpartie bzw. den Anfangsbereich einer Nachtrockenpartie, wenn z. B. in einer Leimpresse oder dergleichen eine starke Wiederbefeuchtung stattgefunden hat, beschränken.A corresponding arrangement is also possible in dryer sections, where the heated drying cylinders are wrapped in the fibrous web 1. For one thing, the cylinders are heated to a temperature higher than that required for drying and for others can of course also the steam blow boxes 3 in the inlet gap between the fibrous web 1 and the drying cylinder can be arranged. Because the procedure is an advantage can be used where the temperature of the fibrous web 1 below 70 ° C and / or the dry content the fibrous web 1 is below 60%, the application of the method can often to the beginning of the dryer section or the beginning of a drying section, if e.g. B. in a size press or the like a strong rewetting has taken place.

Claims (7)

Verfahren zur Verringerung der Haftung einer feuchten Papier-, Textil- oder anderen Faserstoffbahn (1) an einer rotierenden Walze (4), dadurch gekennzeichnet, daß
zwischen der Walze (4) und der Faserstoffbahn (1) ein Dampfpolster erzeugt wird.Process for reducing the adhesion of a moist paper, textile or other fibrous web (1) to a rotating roller (4), characterized in that
a vapor cushion is generated between the roller (4) and the fibrous web (1). Verfahren nach Anspruch 1, dadruch gekennzeichnet, daß
die Walze (4) auf eine höhere als für die Trocknung oder Entwässerung der Faserstoffbahn (1) notwendige Temperatur beheizt wird.A method according to claim 1, characterized in that
the roller (4) is heated to a higher temperature than is necessary for drying or dewatering the fibrous web (1). Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß
die Oberfläche der Walze (4) auf eine Temperatur von über 120 °C aufgeheizt wird.A method according to claim 2, characterized in that
the surface of the roller (4) is heated to a temperature of over 120 ° C. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß
in den Einlaufspalt zwischen der Walze (4) und der Faserstoffbahn (1) Dampf eingeblasen wird.Method according to one of claims 1 to 3, characterized in that
steam is blown into the inlet gap between the roller (4) and the fibrous web (1). Anwendung des Verfahrens nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß
die Temperatur der Faserstoffbahn (1) unter 70 °C liegt.Application of the method according to one of claims 1 to 4, characterized in that
the temperature of the fibrous web (1) is below 70 ° C. Anwendung des Verfahrens nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß
der Trockengehalt der Faserstoffbahn (1) unter 60 % liegt.Application of the method according to one of claims 1 to 4, characterized in that
the dry content of the fibrous web (1) is below 60%. Anwendungx des Verfahrens nach Anspruch 5 oder 6 in einer Pressenpartie zur Entwässerung oder einer Trockenpartie zur Trocknung der Faserstoffbahn (1).Applicationx of the method according to claim 5 or 6 in a press section for dewatering or a dryer section for drying the fibrous web (1).
EP98112932A 1997-09-20 1998-07-11 Process for reducing the adhesion between a wet fibrous web and a rotating roller Withdrawn EP0903437A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19741517 1997-09-20
DE19741517A DE19741517A1 (en) 1997-09-20 1997-09-20 Process for reducing the adhesion of a moist fibrous web to a rotating roller

Publications (2)

Publication Number Publication Date
EP0903437A2 true EP0903437A2 (en) 1999-03-24
EP0903437A3 EP0903437A3 (en) 2000-04-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98112932A Withdrawn EP0903437A3 (en) 1997-09-20 1998-07-11 Process for reducing the adhesion between a wet fibrous web and a rotating roller

Country Status (3)

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US (1) US6436239B2 (en)
EP (1) EP0903437A3 (en)
DE (1) DE19741517A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19958867A1 (en) * 1999-12-07 2001-07-12 Voith Paper Patent Gmbh Fiber web drying station has controlled parameters for the drying blanket tension and the temp of the drying cylinders for a trouble-free web passage through the station at high speeds
DE10311993A1 (en) 2003-03-19 2004-10-14 Voith Paper Patent Gmbh Process for treating a fibrous web
FI120316B (en) * 2004-12-31 2009-09-15 Metso Paper Inc Method for improving the runability of the dryer section in a paper machine
US9244287B2 (en) 2008-05-09 2016-01-26 Reald Inc. Optical systems with compact back focal lengths
WO2013010167A2 (en) * 2011-07-14 2013-01-17 Reald Inc. Optical systems with compact back focal lengths
DE102016125172A1 (en) 2016-12-21 2018-06-21 Voith Patent Gmbh Method for operating a heating group subsystem and heating subsystem

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4351700A (en) * 1980-06-23 1982-09-28 Dove Norman F Steam distribution apparatus for the nip of two rolls
EP0276203A2 (en) * 1987-01-23 1988-07-27 Valmet Paper Machinery Inc. Method and device in the press section of a paper machine
WO1992013133A1 (en) * 1991-01-18 1992-08-06 Valmet Paper Machinery Inc. Method and device in the press section of a paper machine for detaching the web from the face of a press roll
DE19731100A1 (en) * 1997-07-19 1999-01-21 Voith Sulzer Papiermasch Gmbh Web adhesion adjustment

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB598111A (en) * 1945-04-12 1948-02-11 Carrier Ross Engineering Compa Withdrawing vapour from paper-making or other machines for drying webs of material
US96039A (en) * 1869-10-19 Improved attachment to rolls for calendering paper-boards
DE588546C (en) * 1930-12-16 1933-11-25 Rudolf Steinmetz Suction device for the steam and supply device for warm air to drying sections for paper machines
DE579525C (en) * 1932-02-25 1933-06-27 Netzschkauer Maschinenfabrik F Drying section on paper and dewatering machines
US3097933A (en) * 1958-07-07 1963-07-16 Kimberly Clark Co Papermaking drying machine
DE1635343A1 (en) * 1966-10-12 1971-04-01 Vepa Ag Method and device for the non-contact heat treatment of goods that can be stressed in longitudinal direction
US3560333A (en) * 1967-08-15 1971-02-02 Scott Paper Co Method and apparatus for drying paper on a yankee dryer
SE364328B (en) * 1969-01-27 1974-02-18 Tampella Oy Ab
FR2106708A5 (en) * 1970-09-22 1972-05-05 Chamouton Daniel
US4596333A (en) * 1983-10-31 1986-06-24 Gilreath Charles T Sheet holder
FI75890C (en) * 1987-01-23 1988-08-08 Valmet Paperikoneet Oy FOERFARANDE OCH ANORDNING I PRESSPARTIET I EN PAPPERSMASKIN FOER LOESGOERING AV BANAN FRAON YTAN AV EN PRESSVALS.
US4876803A (en) * 1987-02-13 1989-10-31 Beloit Corporation Dryer apparatus for drying a web
US5507104A (en) 1987-02-13 1996-04-16 Beloit Technologies, Inc. Web drying apparatus
CA1328167C (en) 1987-02-13 1994-04-05 Borgeir Skaugen Apparatus for drying a web
US4934067A (en) 1987-02-13 1990-06-19 Beloit Corporation Apparatus for drying a web
US5404653A (en) 1987-02-13 1995-04-11 Beloit Technologies, Inc. Apparatus for drying a web
EP0289477A3 (en) * 1987-04-28 1989-03-08 Valmet Paper Machinery Inc. Method for hot-pressing of a paper web and a drying device for the implementation of the method
FI93663C (en) * 1990-06-06 1995-05-10 Valmet Paper Machinery Inc Method and apparatus in a press section of a paper machine provided with a separate press
DE4126233C1 (en) 1991-08-08 1992-09-17 Sulzer-Escher Wyss Gmbh, 7980 Ravensburg, De
FI95061C (en) * 1993-03-08 1995-12-11 Valmet Paper Machinery Inc Method of calendering paper web and calender for application of the method
FI100013B (en) 1993-03-22 1997-08-15 Valmet Paper Machinery Inc Drying procedure and drying module and drying portions where applied, especially for a fast-moving paper machine
DE4415581C2 (en) * 1994-05-04 1995-12-07 Voith Gmbh J M Paper coating device
SE502817C2 (en) * 1994-07-04 1996-01-22 Flaekt Ab Device adapted to reduce the effects of a paper web's tendency to adhere to a drying cylinder in a paper machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4351700A (en) * 1980-06-23 1982-09-28 Dove Norman F Steam distribution apparatus for the nip of two rolls
EP0276203A2 (en) * 1987-01-23 1988-07-27 Valmet Paper Machinery Inc. Method and device in the press section of a paper machine
WO1992013133A1 (en) * 1991-01-18 1992-08-06 Valmet Paper Machinery Inc. Method and device in the press section of a paper machine for detaching the web from the face of a press roll
DE19731100A1 (en) * 1997-07-19 1999-01-21 Voith Sulzer Papiermasch Gmbh Web adhesion adjustment

Also Published As

Publication number Publication date
DE19741517A1 (en) 1999-03-25
US20010007279A1 (en) 2001-07-12
EP0903437A3 (en) 2000-04-05
US6436239B2 (en) 2002-08-20

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