EP0009195A1 - Einrichtung zur Führung einer Bahn, insbesondere einer Papierbahn - Google Patents

Einrichtung zur Führung einer Bahn, insbesondere einer Papierbahn Download PDF

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Publication number
EP0009195A1
EP0009195A1 EP79103377A EP79103377A EP0009195A1 EP 0009195 A1 EP0009195 A1 EP 0009195A1 EP 79103377 A EP79103377 A EP 79103377A EP 79103377 A EP79103377 A EP 79103377A EP 0009195 A1 EP0009195 A1 EP 0009195A1
Authority
EP
European Patent Office
Prior art keywords
web
stray field
field electrodes
electrodes
nozzle boxes
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.)
Ceased
Application number
EP79103377A
Other languages
German (de)
English (en)
French (fr)
Inventor
Hans-Christian Grassmann
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0009195A1 publication Critical patent/EP0009195A1/de
Ceased 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
    • 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
    • D21F5/16—Drying webs by electrical heating
    • D21F5/165—Inductive heating; Capacitive heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
    • F26B13/104—Supporting materials without tension, e.g. on or between foraminous belts supported by fluid jets only; Fluid blowing arrangements for flotation dryers, e.g. coanda nozzles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/343—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects in combination with convection

Definitions

  • the invention relates to a device for guiding a web, in particular a paper web, on the stray field electrodes of a high-frequency dryer.
  • high-frequency dryers are used to an increasing extent, which are connected downstream of the conventional dryer sections of the paper machine.
  • capacitive high-frequency dryers cf., for example, DE-PS 20 27 674
  • a high level of economy and very high uniformity of drying can be achieved at the same time.
  • the path guidance on the stray field electrodes by guide and deflection rollers is somewhat problematic, since undesirable tensile stresses occur as a result of this and, on the other hand, voltages are also induced in the waves, which lead to harmful bearing currents.
  • the object of the present invention is to provide a simple web guide in the capacitive high-frequency field, which manages with as few rollers as possible.
  • the web can be guided in a contactless manner at a defined distance from the stray field electrodes by flowing gases in accordance with the floating dryer principle.
  • gases e.g. Dry kraft papers largely without tension and keep the number of rollers lower.
  • the blowing devices provided in the form of nozzle boxes for the gases can advantageously at least partially as stray field electrodes . be trained. However, it is also possible to provide additional normal rod-shaped stray field electrodes and, if necessary, to arrange them alternately on different sides of the web. In order to safely remove the steam vapors that occur during high-frequency drying and to prevent condensation on the electrodes, it is advantageous if the gases carrying the web are hot gases.
  • the paper web 1 to be dried passes in the direction of arrow 11 through a cylinder dryer 5, in which it is pre-dried to a moisture content of about 30% atro.
  • the paper web 1 then runs through a capacitive high-frequency dryer 2 and is dried here to the desired residual moisture.
  • the resulting moisture is recorded with a measuring device 3 and passed to a computer 4 which controls the cylinder dryer 5 and the one with a frequency of e.g. 30 MHz operating high-frequency generator 22 of the high-frequency dryer 2 modulates.
  • the capacitive high-frequency dryer 2 consists essentially of stray field electrodes 21, which - viewed in the direction of the web - are alternately connected to different poles of the high-frequency generator 22. For the sake of simplicity of illustration, only one plane with a few electrodes is drawn; in reality, the web traverses a number of electrode levels.
  • the stray field electrodes 21 are designed as nozzle boxes, as are used in the so-called suspension railway dryers.
  • the hot air 23 emerging from the nozzle boxes of the stray field electrodes 21, and the hot air 23 via a line 24 source 25 is supplied, the web 1 and eliminates the steam vapors created by the high frequency drying.
  • the stray field electrodes 21 designed as nozzle boxes are arranged with different polarity on both sides of the paper web 1.
  • normal rod-shaped electrodes 26 are additionally provided on the same side of the paper web 1 between the stray field electrodes 21 designed as nozzle boxes.
  • the normal electrodes 26 and the stray field electrodes 21 designed as nozzle boxes lie on different sides of the paper web 1.
  • rod-shaped electrodes 27 are welded to them according to FIG. 2d, between which the electric field essentially runs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Biotechnology (AREA)
  • Textile Engineering (AREA)
  • Molecular Biology (AREA)
  • Drying Of Solid Materials (AREA)
  • Paper (AREA)
  • Advancing Webs (AREA)
EP79103377A 1978-09-22 1979-09-10 Einrichtung zur Führung einer Bahn, insbesondere einer Papierbahn Ceased EP0009195A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2841371 1978-09-22
DE2841371A DE2841371C2 (de) 1978-09-22 1978-09-22 Einrichtung zur Führung einer Papierbahn im kapazitiven Hochfrequenztrockner

Publications (1)

Publication Number Publication Date
EP0009195A1 true EP0009195A1 (de) 1980-04-02

Family

ID=6050203

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79103377A Ceased EP0009195A1 (de) 1978-09-22 1979-09-10 Einrichtung zur Führung einer Bahn, insbesondere einer Papierbahn

Country Status (6)

Country Link
US (1) US4257167A (US20090163788A1-20090625-C00002.png)
EP (1) EP0009195A1 (US20090163788A1-20090625-C00002.png)
JP (1) JPS5549682A (US20090163788A1-20090625-C00002.png)
CA (1) CA1144992A (US20090163788A1-20090625-C00002.png)
DE (1) DE2841371C2 (US20090163788A1-20090625-C00002.png)
FI (1) FI792867A (US20090163788A1-20090625-C00002.png)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0094825A2 (en) * 1982-05-17 1983-11-23 The Electricity Council Convective drying
WO1987004739A1 (en) * 1986-02-06 1987-08-13 Itronic Process Ab Arrangement for a process plant arranged for the heat treatment of strip-shaped products
WO1988007103A1 (en) * 1987-03-11 1988-09-22 Valmet Paper Machinery Inc. Arrangement for drying a running web
GB2210440A (en) * 1986-02-06 1989-06-07 Itronic Process Ab Arrangements for a process plant arranged for the heat treatment of strip-shaped products
EP0853748A1 (en) * 1995-10-06 1998-07-22 Avery Dennison Corporation Apparatus and method for drying or curing web materials and coatings

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61151289U (US20090163788A1-20090625-C00002.png) * 1985-03-12 1986-09-18
US4638571A (en) * 1986-04-02 1987-01-27 Cook William A Radio frequency nozzle bar dryer
JPH02110283A (ja) * 1988-10-17 1990-04-23 Hisaka Works Ltd 布帛又はシート状繊維材料のテンションレス高周波乾燥装置
US5024004A (en) * 1990-03-07 1991-06-18 W. R. Grace & Co.-Conn. Radio frequency air float bar
US5064979A (en) * 1990-08-07 1991-11-12 W. R. Grace & Co.-Conn. Microwave air float bar for drying a traveling web
FI104645B (fi) * 1998-08-19 2000-03-15 Valmet Corp Menetelmä ja sovitelma paperin tai kartongin ohjaamiseksi valmistuksen aikana
EP1340409A4 (en) * 2000-12-05 2004-06-09 Comdel Inc RF ENERGY CARRIER FURNACE
AU2003220292A1 (en) * 2002-03-18 2003-10-08 Codaco, Inc. Electrode apparatus for stray field radio frequency heating
JP2016213139A (ja) * 2015-05-13 2016-12-15 株式会社リコー 高周波誘電加熱装置
JP6720605B2 (ja) * 2016-03-16 2020-07-08 株式会社リコー 乾燥装置および液体を吐出する装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1265686A (fr) * 1960-08-20 1961-06-30 Basf Ag Dispositif pour le traitement thermique et, le cas échéant, pour la transformationde matières dans un champ de haute fréquence
DE1604945A1 (de) * 1965-06-14 1971-01-14 Ilford Ltd Verfahren und Vorrichtung zur Entfernung der Fluessigkeit aus Feuchtigkeit oder Loesungsmittel enthaltenden Schichten,die als UEberzuege auf biegsame Bahnen aufgetragen sind
DE2027674A1 (de) * 1970-06-05 1971-12-09 Siemens Ag Kapazitive Hochfrequenz Heizvorrichtung
US3722105A (en) * 1971-07-06 1973-03-27 Owens Illinois Inc Apparatus and method for applying radio frequency energy to a moving web of material
US3982328A (en) * 1974-05-29 1976-09-28 Aktiebolaget Svenska Flaktfabriken Dryer for material coated on two surfaces
US9979038B2 (en) * 2010-05-24 2018-05-22 Trustees Of Boston University System and method for energy storage and recovery

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866255A (en) * 1964-07-27 1975-02-18 Bangor Punta Operations Inc Dielectric apparatus for and method of treating traveling paper webs and the like
US3532848A (en) * 1968-04-26 1970-10-06 Varian Associates Resonant r.f. energy applicator for treating wide regions of material
US3740257A (en) * 1971-09-21 1973-06-19 Ppg Industries Inc Process and apparatus for dielectric heat drying elastomer coated glass fibers
SE393825B (sv) * 1974-05-29 1977-05-23 Svenska Flaektfabriken Ab Anordning for att vid transport av ett ban- eller arkformigt av luft uppburet material, framfora materialet i ett fixerat stabilt svevlege genom en eller flera passager av en behandlingsanleggning, foretredesvis ...
US3952421A (en) * 1974-10-18 1976-04-27 Chemetron Corporation Dielectric heating arrangement for drying a continuously moving web of material
DE2450000C2 (de) * 1974-10-22 1983-07-07 Kramer, Carl, Prof. Dr.-Ing., 5100 Aachen Vorrichtung zum schwebend Führen von Warenbahnen auf einem Gaspolster
US3953701A (en) * 1975-03-24 1976-04-27 Radio Frequency Co., Inc. Radio frequency heating and ventilating electrode system
US4036676A (en) * 1975-04-14 1977-07-19 William Pennington Heat sealing of plastic sheets
US4055295A (en) * 1976-09-15 1977-10-25 Champion International Corporation Self-sealing envelope and method of making same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1265686A (fr) * 1960-08-20 1961-06-30 Basf Ag Dispositif pour le traitement thermique et, le cas échéant, pour la transformationde matières dans un champ de haute fréquence
DE1604945A1 (de) * 1965-06-14 1971-01-14 Ilford Ltd Verfahren und Vorrichtung zur Entfernung der Fluessigkeit aus Feuchtigkeit oder Loesungsmittel enthaltenden Schichten,die als UEberzuege auf biegsame Bahnen aufgetragen sind
DE2027674A1 (de) * 1970-06-05 1971-12-09 Siemens Ag Kapazitive Hochfrequenz Heizvorrichtung
US3722105A (en) * 1971-07-06 1973-03-27 Owens Illinois Inc Apparatus and method for applying radio frequency energy to a moving web of material
US3982328A (en) * 1974-05-29 1976-09-28 Aktiebolaget Svenska Flaktfabriken Dryer for material coated on two surfaces
US9979038B2 (en) * 2010-05-24 2018-05-22 Trustees Of Boston University System and method for energy storage and recovery

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0094825A2 (en) * 1982-05-17 1983-11-23 The Electricity Council Convective drying
EP0094825A3 (en) * 1982-05-17 1985-01-16 The Electricity Council Convective drying
WO1987004739A1 (en) * 1986-02-06 1987-08-13 Itronic Process Ab Arrangement for a process plant arranged for the heat treatment of strip-shaped products
GB2210440A (en) * 1986-02-06 1989-06-07 Itronic Process Ab Arrangements for a process plant arranged for the heat treatment of strip-shaped products
GB2210440B (en) * 1986-02-06 1990-10-24 Itronic Process Ab Heat treatment apparatus for moving web-shaped products
AT395873B (de) * 1986-02-06 1993-03-25 Itronic Process Ab Waermebehandlungsanlage fuer bahnfoermige produkte
WO1988007103A1 (en) * 1987-03-11 1988-09-22 Valmet Paper Machinery Inc. Arrangement for drying a running web
EP0853748A1 (en) * 1995-10-06 1998-07-22 Avery Dennison Corporation Apparatus and method for drying or curing web materials and coatings
EP0853748A4 (en) * 1995-10-06 1999-09-15 Avery Dennison Corp APPARATUS AND METHOD FOR DRYING OR CURING MATERIALS AND TAPE-COATINGS

Also Published As

Publication number Publication date
DE2841371C2 (de) 1987-10-22
FI792867A (fi) 1980-03-23
DE2841371B1 (de) 1980-02-14
JPS5549682A (en) 1980-04-10
US4257167A (en) 1981-03-24
CA1144992A (en) 1983-04-19

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE DE FR GB IT SE

17P Request for examination filed
STAA Information on the status of an ep patent application or granted ep patent

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18R Application refused

Effective date: 19810611

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GRASSMANN, HANS-CHRISTIAN