DE698964C - Device for drying materials, in particular wood and cellulose, in an electrical high-frequency field by means of short or ultra-short waves - Google Patents

Device for drying materials, in particular wood and cellulose, in an electrical high-frequency field by means of short or ultra-short waves

Info

Publication number
DE698964C
DE698964C DE1939S0137290 DES0137290D DE698964C DE 698964 C DE698964 C DE 698964C DE 1939S0137290 DE1939S0137290 DE 1939S0137290 DE S0137290 D DES0137290 D DE S0137290D DE 698964 C DE698964 C DE 698964C
Authority
DE
Germany
Prior art keywords
short
ultra
cellulose
frequency field
waves
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
DE1939S0137290
Other languages
German (de)
Inventor
Dr Rer Nat Eugen Sauter
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 Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
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 Schuckertwerke AG, Siemens AG filed Critical Siemens Schuckertwerke AG
Priority to DE1939S0137290 priority Critical patent/DE698964C/en
Application granted granted Critical
Publication of DE698964C publication Critical patent/DE698964C/en
Expired legal-status Critical Current

Links

Classifications

    • 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

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)

Description

Einrichtung zum Trocknen von Stoffen, insbesondere von- Holz und Zellstoff, im elektrischen Hochfrequenzfeld mittels Kurz- oder Ultrakurzwellen Die Erfindung betrifft eine Einrichtung zum Trocknen von Stoffen, insbesondere vorn Holz und Zellstoff, im Hochfrequenzfeld mittels Kurz- oder Ultrakurzwellen und hat den Zwoeck, das zwischen den Kondens,atorplatt@en der Trockeneinrichtung befindliche Gut, insbesondere an den Grenzflächen, in gleichmäßiger Weise von der darin enthaltenen Feuchtigkeit ,ganz oder teilweise zu befreien. Es hat sich gezeigt, daß eine Trocknung von Stoffen im Hochfrequenzfeld bei Anwendung der hierfür bekannten Einridhtungen vor allem hinsichtlich der Gleichmäßigkeit der Trocknung in ausreichendem Maße nicht möglich ist, weil ein Temperaturgefälle nach außen besteht und der .aus dem Gut während des Trocknungsvorganges entweichende Feuchtigkeitsdampf, insbesondere an den Bexührungsstellen des Gutes mit den Elektroden oder in deren Nähe bzw. an den Elektroden selbst, sich niederschlägt und den zu trocknenden Stoff immer wieder, unter Umständen über den ursprünglichen Feuchtigkeitsgehalt hinaus gnfeuchtet.Device for drying materials, especially wood and cellulose, in the high-frequency electric field by means of short or ultra-short waves The invention relates to a device for drying fabrics, especially wood and cellulose, in the high-frequency field by means of short or ultra-short waves and has the purpose that between the condensate, ator plates of the drying device located, in particular on the interfaces, in a uniform manner from the moisture contained therein to free them in whole or in part. It has been shown that drying of fabrics in the high-frequency field when using the Einridhtungen known for this purpose not possible to a sufficient extent with regard to the evenness of the drying process is because there is a temperature gradient to the outside and that of the good during moisture vapor escaping during the drying process, especially at the contact points of the goods with the electrodes or in their vicinity or on the electrodes themselves and the fabric to be dried repeatedly, possibly over the Moisturized beyond the original moisture content.

Die Erfindung besteht in einer Einrichtung zum Trocknen von Stoffen, insbesondere von Holz und Zellstoff, im Nochfrequenzfeld mittels Kurz- oder Ultrakurzwellen,. bei der zwischen dem zu _ behandelnden Gut und den Kondensatorplattenoder ganz oder. teilweise um das Gut ein Stoff mit großen dielektrischen Verlusten angeordnet ist. Es genügt in den meisten Fällen, wenn dieser Stoff als dünne Schicht verwendet wird; die sich auf Grund ihrer physikalischen Eigenschaften im Ultrakurzwellenfeld stark erhitzt, -so daß eine Kondensation des Wasserdämpfes an den Grenzflächen dieser Schicht mit dem zu behandelnden Gut nicht mehr :eintreten kann. Als Baustoffe für diese Schicht haben sich eine Reihe von Dielektriken, insbesondere Etemnit,und Asbest, geeignet ierwiesen.The invention consists in a device for drying fabrics, in particular of wood and cellulose, in the still-frequency field by means of short or ultra-short waves. between the material to be treated and the capacitor plates or completely or. A substance with high dielectric losses is partially arranged around the material. In most cases it is sufficient if this substance is used as a thin layer; which due to their physical properties are strong in the ultra-short wave field heated, so that a condensation of the water vapor at the interfaces of this Layer with the goods to be treated no longer: can occur. As building materials for this layer has a number of dielectrics, especially etemnite, and asbestos, suitable meadows.

In der Abbildung ist der Gegenstand der Erfindung schematisch dargestellt. Zwischen den Kondensatorpllatten i und 2, die die Stromanschlüsse 3 und q. aufweisen, befindet sich das zu trockende Gut 5. Zur Verhütung der Kondensation des aus dem Gut erit#' weichenden -Wasserdampfes an den KondenM, satorplatten und der dadurch möglichen T27 feuchtuüg des in der Nähe befindlichen Gutes sind zwischen diesem und den Kondensatorplatten je eine dünne Schicht .6 und 7 Eternit angeordnet. Durch diese zweckmäßig in Plattenform verwendeten Schichten, die sich während des Trocknungsvorganges stark erhitzen, wird eine Anfeuchtung des Gutes vermieden, da eine Kondensation des entweichenden Dampfes an der Grenzfläche des zu trocknenden Gutes nicht mehr stattfinden kann.In the figure, the subject matter of the invention is shown schematically. Between the capacitor plates i and 2, which are the power connections 3 and q. have, the item to be dried is 5. To prevent condensation of the water vapor that escapes from the estate on the condensers, sator plates and the possible T27 moisture of the goods in the vicinity are between this and the capacitor plates each a thin layer .6 and 7 Eternit arranged. By these layers expediently used in plate form, which during the Strongly heat the drying process, a moistening of the goods is avoided because a condensation of the escaping steam at the interface of the to be dried Good can no longer take place.

Der Gegenstand der Erfindung ist nicht an die dargestellte Ausführungsform gebunden, sondern kann vielmehr in verschiedener Weise ausgebildet zur Anwendung gebracht werden. So ist es z. B. möglich, die Zwischenlagen des sich im Hochfrequenzfeld starkerhitzenden Dielektrikums nicht nur an den Grenzflächen des zu erhitzenden Stoffes und der Elektroden anzubringen, sondern auch z. B: bei schichtförmig angeordnetem Gut zwischen die :einzelnen Schichten des zu trocknenden Stoffes zu legen. Damit kann gegebenenfalls eine Vergleichmäßigung der Trocknung erreicht werden, da die gegebenenfalls an den Rändern des Gutes während des Trockriungsvorganges sich sammelnde Feuchtigkeitsmenge durch die stark :erhitzten Zwischenlagen im beschleunigten Maße zur Verdampfung gebrachi wird.The subject matter of the invention is not related to the illustrated embodiment tied, but can rather be designed in various ways for use to be brought. So it is z. B. possible, the intermediate layers of the high-frequency field strongly heating dielectric not only at the interfaces of the one to be heated To attach the substance and the electrodes, but also z. B: when arranged in layers Good to put between the: individual layers of the fabric to be dried. In order to If necessary, the drying can be evened out, since the possibly accumulating at the edges of the goods during the drying process Amount of moisture through the strongly: heated liners to an accelerated degree is used for evaporation.

Um. die Wärmeabgabe durch die Konden-Sätörplatten möglichst gering zuhalten, können "diese mit einem wärmeisolierenden Stoff um-oder in :eine gleich wirksame Schicht eingebettet sein.Around. the heat emission through the condensate seed plates is as low as possible to keep "these with a heat-insulating material around or in: an equal effective layer be embedded.

Claims (3)

PATENTANSPRÜCHE. i. Einrichtung zum Trackneii von Stoffen, insbesondere von Holz und Zellstoff, im Hochfrequenzfeld mittels Kurz-oder Ultrakurzwellen; dadurch gekennzeichnet, daß zwischen dem zu behandelnden Gut und den Kandeaisatorplatten loder :ganz oder teilweise um das Gut ein Stoff mit großen dielektrischen Verlusten angeordnet ist. PATENT CLAIMS. i. Device for the tracking of substances, in particular of wood and cellulose, in the high-frequency field by means of short or ultra-short waves; through this characterized in that between the material to be treated and the candy-maker plates lor: completely or partially around the good a substance with high dielectric losses is arranged. 2. Einrichtung nach Anspruch i, dadurch gekennzeichnet; daß = zwischen deiner .oder mehreren der Schichten des zu behandelnden Gut-es ein Stoff mit grqßen diaelektrischen Verlusten angeordnet ist. 2. Device according to claim i, characterized in that; that = between Your .or several of the layers of the goods to be treated - it is a substance of great size diaelectric losses is arranged. 3. Einrichtung nach den Ansprüchen I und 2; dadurch gekennzeichnet; daß die zweckmäßig plattenförmig ausgebildeten Schichten mit großen dielektrischen Verlusten aus Eternit oder Asbest bestehen. .. Einrichtung nach den Ansprüchen i bis 3, dadurch gekennzeichnet, daß die Kondensatorplatten mit einem wärmeisolierenden Stoff umgeben oder in eine isolierend wirkende Schicht eingebettet sind.3. Device according to claims I and 2; characterized; that the expediently plate-shaped layers consist of Eternit or asbestos with high dielectric losses. .. Facility according to claims i to 3, characterized in that the capacitor plates surrounded by a heat-insulating material or in an insulating layer are embedded.
DE1939S0137290 1939-06-03 1939-06-03 Device for drying materials, in particular wood and cellulose, in an electrical high-frequency field by means of short or ultra-short waves Expired DE698964C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1939S0137290 DE698964C (en) 1939-06-03 1939-06-03 Device for drying materials, in particular wood and cellulose, in an electrical high-frequency field by means of short or ultra-short waves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1939S0137290 DE698964C (en) 1939-06-03 1939-06-03 Device for drying materials, in particular wood and cellulose, in an electrical high-frequency field by means of short or ultra-short waves

Publications (1)

Publication Number Publication Date
DE698964C true DE698964C (en) 1940-11-20

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Family Applications (1)

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DE1939S0137290 Expired DE698964C (en) 1939-06-03 1939-06-03 Device for drying materials, in particular wood and cellulose, in an electrical high-frequency field by means of short or ultra-short waves

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE949154C (en) * 1942-12-05 1956-09-13 Rudolf Kuerth Process for drying fabrics and bodies of all kinds
DE1120619B (en) * 1959-03-14 1961-12-28 Homann Werke Wilhelm Homann Microwave oven

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE949154C (en) * 1942-12-05 1956-09-13 Rudolf Kuerth Process for drying fabrics and bodies of all kinds
DE1120619B (en) * 1959-03-14 1961-12-28 Homann Werke Wilhelm Homann Microwave oven

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