DE2932373C2 - Device for capacitive stray field drying of paper webs or the like - Google Patents

Device for capacitive stray field drying of paper webs or the like

Info

Publication number
DE2932373C2
DE2932373C2 DE19792932373 DE2932373A DE2932373C2 DE 2932373 C2 DE2932373 C2 DE 2932373C2 DE 19792932373 DE19792932373 DE 19792932373 DE 2932373 A DE2932373 A DE 2932373A DE 2932373 C2 DE2932373 C2 DE 2932373C2
Authority
DE
Germany
Prior art keywords
web
paper web
electrodes
drying
stray field
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
Application number
DE19792932373
Other languages
German (de)
Other versions
DE2932373A1 (en
Inventor
Hans-Christian Dipl.-Ing. 8523 Igelsdorf 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
Priority to DE19792932373 priority Critical patent/DE2932373C2/en
Publication of DE2932373A1 publication Critical patent/DE2932373A1/en
Application granted granted Critical
Publication of DE2932373C2 publication Critical patent/DE2932373C2/en
Expired legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00Dryer section of machines for making continuous webs of paper
    • D21F5/16Drying webs by electrical heating
    • D21F5/165Inductive heating; Capacitive heating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00Drying solid materials or objects by processes involving the application of heat
    • F26B3/32Drying 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
    • F26B3/34Drying 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
    • F26B3/343Drying 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Biotechnology (AREA)
  • Molecular Biology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Constitution Of High-Frequency Heating (AREA)

Claims (1)

1 2 Voraussetzung für kurze Zuleitungswege zwischen Patentansprüche: Hochfrequenzgenerator und Elektrodengruppen; au ßerdem ermöglicht sie vorteilhaft klein dimensionierte1 2 Prerequisite for short supply routes between patent claims: high-frequency generator and electrode groups; In addition, it allows advantageously small dimensions 1. Einrichtung zur kapazitiven Streufeldtrocknung Blaskästen für die zusätzlich vorsehbare Heißlufttrockvon Papierbahnen oder dgl, bei der die Papierbahn 5 nung nach Anspruch 2. Diese günstige, kompakte Bauan quer zur Bahnrichtung angeordneten und in weise wäre mit versetzt an einer langgestreckten Pa-Längsrichtung hintereinanderliegenden stabförmi- pierbahn angeordneten Elektrodengruppen nicht zu ergen Elektroden in definiertem Abstand vorbeifuhr- zielen.1. Device for capacitive stray field drying Blow boxes for the additional hot air drying of Paper webs or the like, in which the paper web 5 tion according to claim 2. This cheap, compact Bauan arranged transversely to the web direction and in wise would be offset on an elongated Pa longitudinal direction successively arranged rod-shaped pier web not to energize electrode groups Aim the electrodes at a defined distance. bar ist, wobei für jede Seite der Papierbahn zumin- Anhand eines in der Zeichnung dargestellten Ausfüh-is bar, with for each side of the paper web at least on the basis of an execution shown in the drawing dest eine Gruppe von zusammengehörigen Elektro- io rungsbeispiels sei die Erfindung näher erläutert; es zeigtAt least one group of associated electrical io approximately example the invention is explained in more detail; it shows den vorgesehen ist, dadurch gekennzeich- Fig. 1 eine schematische Ansicht einer kapazitivenwhich is provided, thereby marked- Fig. 1 is a schematic view of a capacitive net, daß zwischen aufeinanderfolgenden Umlen- Streufeldelektrodenanordnungundnet that between successive Umlen stray field electrode arrangement and kungen (5) der Papierbahn (1) jeweils nur eine Grup- F i g. 2 eine Falte beim Vorbeilauf an Stabelektroden,kungen (5) of the paper web (1) only one group F i g. 2 a fold when walking past stick electrodes, pe (3, 4) von zusammengehörigen Elektroden (31, Zur Trocknung der in Richtung des Pfeiles 7 überpe (3, 4) of associated electrodes (31, for drying the in the direction of arrow 7 over 41)aufeinerSeite(ll,12)derPapierbahn(l)liegt 15 Rollen 5 laufenden Papierbahn 1 sind eine Reihe von41) on one side (ll, 12) of the paper web (l) lies 15 rolls 5 running paper web 1 are a series of 2. Einrichtung nach Anspruch 1, dadurch gekenn- kapazitiven Streufeldelektrodengruppen vorgesehen, zeichnet, daß eine zusätzliche Heißlufttrocknung für von denen die Gruppen 3 und 4 näher dargestellt sind, jede Elektrodengruppe (3,4) der Bahn (1) vorgese- Die Streufeldelektrodengruppe 3 besteht aus den einhenist zelnen stabförmigen Streufeldelektroden 31 mit ab-2. Device according to claim 1, characterized in that capacitive stray field electrode groups are provided, indicates that additional hot air drying for groups 3 and 4 are shown in more detail, Each electrode group (3, 4) of the web (1) is provided. The stray field electrode group 3 consists of the units individual rod-shaped stray field electrodes 31 with 20 wechselnd unterschiedlicher Polarität; gleicherweise ist20 alternating polarity; is alike die Elektrodengruppe 4 aus den stabförmigen Elektroden 41 zusammengesetzt Wie ersichtlich, liegen die Elektroden 31 der Elektrodengruppe 3 auf der Seite Uthe electrode group 4 composed of the rod-shaped electrodes 41. As can be seen, the Electrodes 31 of electrode group 3 on the U side Die Erfindung bezieht sich auf eine Einrichtung zur der Papierbahn 1, dagegen die Elektroden 41 infolge der kapazitiven Streufeldtrocknung von Papierbahnen oder 25 Umlenkung durch die Rollen 5 auf der Seite 12 der dgl., bei der die Papierbahn an quer zur Bahnrichtung Papierbahn 1. Läuft nun eine Längsfalte 2 an den Eckangeordneten und in Längsrichtung hintereinander lie- troden 31 vorbei, se wird diese Falte im Verhältnis zur genden stabförmigen Elektroden in definierten Abstand übrigen Bahn zuwenig getrocknet, dagegen an den vorbeiführbar ist, wobei für jede Seite der Papierbahn Elektroden 41 übertrocknet, so daß sich in der Summe zumindest eine Gruppe von zusammengehörigen Elek- 30 etwa die gleiche Feuchte ergibt, wie sie die übrige Bahn troden vorgesehen ist. 1 besitzt. Wie ersichtlich, sind die Elektrodengruppen 3The invention relates to a device for the paper web 1, however, the electrodes 41 as a result of capacitive stray field drying of paper webs or 25 deflection by the rollers 5 on the side 12 of the Like., in which the paper web on transversely to the web direction paper web 1. Now runs a longitudinal fold 2 at the corner and electrodes 31 one behind the other in the longitudinal direction, this fold becomes in relation to the lowing rod-shaped electrodes at a defined distance from the rest of the web insufficiently dried, on the other hand on the Can be passed, with electrodes 41 overdrying for each side of the paper web, so that in the sum at least one group of associated electronics results in approximately the same moisture content as the rest of the web troden is provided. 1 owns. As can be seen, the electrode groups are 3 Mit diesem Oberbegriff wird auf eine Anordnung Be- bzw. 4 zwischen durch die Rollen 5 erzielten Umlenkunzug genommen, wie sie beispielsweise aus der britischen gen der Bahn 1 vorgesehen.This generic term refers to an arrangement or 4 between deflection achieved by the rollers 5 taken as provided, for example, from the British gene line 1. Patentschrift 11 81 687 bekannt ist. Eine derartige kapa- Wie ferner noch aus der Zeichnung ersichtlich, sind die zitive Hochfrequenztrocknung mit Streufeldelektroden 35 Elektrodengruppen 3,4 von Kästen 6 umgeben, in die hat sich gut bewährt. Heißluft eingeblasen werden kann.Patent 11 81 687 is known. Such a capacity, as can also be seen from the drawing, are the zitive high-frequency drying with stray field electrodes 35 electrode groups 3, 4 surrounded by boxes 6 into which has proven itself well. Hot air can be blown in. Beim Trocknungsvorgang einer derartigen Bahn ist During the drying process of such a web nicht immer von vornherein sichergestellt, daß die Bahn Hierzu 1 Blatt Zeichnungennot always ensured from the outset that the web for this purpose 1 sheet of drawings völlig glatt ist; es können sich z. B. Falten oder Ausbeulungen gebildet haben. Eine hierdurch drohende inho- 40
mogene Trocknung der Papierbahn wird durch beidseitige Anordnung von Elektrodengruppen ausgeschlossen.
is completely smooth; it can z. B. wrinkles or bulges have formed. An inho- 40
Mogeneous drying of the paper web is prevented by the arrangement of electrode groups on both sides.
Bei der bekannten gegenüber liegenden Anordnung
der Elektrodengruppen nach der GB-PS 11 81 687 er- -«5
gibt sich aber das Problem der (ersten oder Wieder-)
Einführung der bis zu mehreren Metern breiten Papierbahn zwischen den Elektroden, die aus Gründen des
Wirkungsgrades nur wenige Millimeter Abstand von
der Papierbahn (und damit voneinander) aufweisen. 50
In the known opposite arrangement
of the electrode groups according to GB-PS 11 81 687 - «5
but there is the problem of (first or re)
Introduction of the up to several meters wide paper web between the electrodes, which for reasons of
Efficiency only a few millimeters away from
the paper web (and thus from each other). 50
Die Aufgabe der vorliegenden Erfindung besteht daher in der Bereitstellung einer gattungsgemäßen Einrichtung zur kapazitiven Streufeldtrocknung von Papierbahnen, bei der trotz beidseitiger Trocknung der
Papierbahn deren leichte Einführbarkeit gewährleistet 55
ist, ohne daß die räumlichen Abmessungen dieser Einrichtung wesentlich über die Abmessungen einseitiger
Bahntrocknungsanordnungen hinausgehen.
The object of the present invention is therefore to provide a device of the generic type for capacitive stray field drying of paper webs, in which despite drying on both sides
Paper web that is easy to insert 55
is, without the spatial dimensions of this device substantially on the dimensions one-sided
Go beyond web drying arrangements.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst,
daß zwischen aufeinanderfolgenden Umlenkungen der 60
Papierbahn jeweils nur eine Gruppe von zusammengehörigen Elektroden auf einer Seite der Papierbahn liegt.
Um die entstehenden Dampfschwaden abzuführen, ist
ferner mit Vorteil eine zusätzliche Heißlufttrocknung
vorsehbar. 65
According to the invention, this object is achieved by
that between successive diversions of the 60
Paper web only one group of associated electrodes lies on one side of the paper web.
In order to dissipate the resulting vapor plumes
an additional hot air drying is also advantageous
predictable. 65
Die Vorteile einer Einrichtung nach der offenbarten
Lehre liegen in der leichten Einführbarkeit der Papierbahn und in der kompakten Bauweise. Letztere ist z. B.
The advantages of a device according to the disclosed
The teaching lies in the ease of insertion of the paper web and in the compact design. The latter is z. B.
DE19792932373 1979-08-09 1979-08-09 Device for capacitive stray field drying of paper webs or the like Expired DE2932373C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19792932373 DE2932373C2 (en) 1979-08-09 1979-08-09 Device for capacitive stray field drying of paper webs or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792932373 DE2932373C2 (en) 1979-08-09 1979-08-09 Device for capacitive stray field drying of paper webs or the like

Publications (2)

Publication Number Publication Date
DE2932373A1 DE2932373A1 (en) 1981-02-12
DE2932373C2 true DE2932373C2 (en) 1985-08-08

Family

ID=6078080

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19792932373 Expired DE2932373C2 (en) 1979-08-09 1979-08-09 Device for capacitive stray field drying of paper webs or the like

Country Status (1)

Country Link
DE (1) DE2932373C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0393417A1 (en) * 1989-04-11 1990-10-24 Imatran Voima Oy Apparatus for heating a dielectric web or sheet material or for decreasing its moisture content

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3484179A (en) * 1966-08-17 1969-12-16 Stevens & Co Inc J P Method for selective heating in textiles with microwaves
DE2027674C3 (en) * 1970-06-05 1974-05-09 Siemens Ag, 1000 Berlin Und 8000 Muenchen Device for uniform capacitive heating of wide webs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0393417A1 (en) * 1989-04-11 1990-10-24 Imatran Voima Oy Apparatus for heating a dielectric web or sheet material or for decreasing its moisture content

Also Published As

Publication number Publication date
DE2932373A1 (en) 1981-02-12

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Legal Events

Date Code Title Description
OAP Request for examination filed
OD Request for examination
8120 Willingness to grant licences paragraph 23
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee