DE4013811A1 - Heat treatment device for loose material - uses HF electrode inserted in rotary drum containing loose material - Google Patents

Heat treatment device for loose material - uses HF electrode inserted in rotary drum containing loose material

Info

Publication number
DE4013811A1
DE4013811A1 DE19904013811 DE4013811A DE4013811A1 DE 4013811 A1 DE4013811 A1 DE 4013811A1 DE 19904013811 DE19904013811 DE 19904013811 DE 4013811 A DE4013811 A DE 4013811A DE 4013811 A1 DE4013811 A1 DE 4013811A1
Authority
DE
Germany
Prior art keywords
drum
loose material
electrode
heat treatment
treatment device
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
DE19904013811
Other languages
German (de)
Other versions
DE4013811C2 (en
Inventor
Bernd Boehnke
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.)
H Krantz GmbH and Co
Original Assignee
H Krantz GmbH and Co
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 H Krantz GmbH and Co filed Critical H Krantz GmbH and Co
Priority to DE19904013811 priority Critical patent/DE4013811A1/en
Publication of DE4013811A1 publication Critical patent/DE4013811A1/en
Application granted granted Critical
Publication of DE4013811C2 publication Critical patent/DE4013811C2/de
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
    • F26B11/0495—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis with provisions for drying by electro-magnetic means, e.g. radiation, microwaves
    • 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
    • F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy

Abstract

The heat treatment device comprises a drum (1) which is rotated about a horizontal axis having a loading and discharge opening (13) at one end. An electrode (15) coupled to a HF generator (14) projects into the drum (1) through the loading and discharge opening (13), relatively from the surrounding housing (10) which acts as a counter-electrode. Pref. the drum (1) is rotated via an electric motor (5), supplied via a HF filter (8) and mounted on a console (6) supported from one of the drum bearings (4). USE - For rapid drying of wet loose material.

Description

Die Erfindung betrifft eine Vorrichtung zur Wärmebehandlung von Schüttgütern, bestehend aus einer um eine horizontale Achse rotierbaren, mit einer stirnseitigen Be- und Entladeöffnung versehenen Trommel, die von einem Gehäuse umgeben ist, das Lager- und Antriebseinrichtungen für die Trommel mitumschließt.The invention relates to a device for heat treatment of bulk goods, consisting of one around a horizontal Axis rotatable, with a front loading and Discharge opening provided drum by a housing is surrounded, the bearing and drive devices for the Includes drum.

Zum Vorentwässern von Schüttgütern sind Vorrichtungen mit perforierten Trommeln bekannt, durch deren Rotation eine so hohe Zentrifugalkraft auf das nasse Schüttgut ausgeübt wird, daß beispielsweise darin enthaltenes Wasser radial nach außen geschleudert wird und durch die Perforationen austritt und abgeleitet werden kann.Devices for the pre-dewatering of bulk goods are included perforated drums known, by the rotation of such a high centrifugal force is exerted on the wet bulk material, that, for example, water contained therein radially outwards is thrown and exits through the perforations and can be derived.

Zum Trocknen von Schüttgütern sind auch Vorrichtungen bekannt, bei denen das nasse Schüttgut beispielsweise über ein Förderband zwischen einer Elektrode und einer Gegenelektrode geleitet wird, die durch eine Differenzspannung ein für die Trocknung erforderliches Hochfrequenzfeld erzeugen. Devices are also available for drying bulk goods known in which the wet bulk material for example a conveyor belt between an electrode and a Counter electrode is passed through a Differential voltage required for drying Generate high frequency field.  

Obschon sich ein derartiges Hochfrequenzfeld grundsätzlich auch in einer rotierenden Stahltrommel erzeugen läßt, indem diese die Masseelektrode bildet und in das Trommelinnere eine von einem Hochfrequenzgenerator gespeiste Elektrode einführbar ist, ergeben sich dabei folgende Probleme: Der gesamte hochfrequente Laststrom müßte von einem rotierenden Vorrichtungsteil, nämlich der Trommel, abgeführt werden. Die Abführung über die Trommellager ist unzureichend, wie entsprechende Versuche mit Hochfrequenz-Papiertrockenanlagen gezeigt haben. Dabei scheiterte bereits die Ableitung des Laststromes über die Lager der Trocknerwalzen. Für eine zuverlässige Laststromableitung müßten daher wartungsintensive Schleifringe eingesetzt werden. Dabei bleibt die Gefahr bestehen, daß beim Auftreten geringster Übergangswiderstände die Trommel Spannung führt. Dies ist zum einen aus Arbeitsschutzgründen nicht zulässig und bewirkt zum anderen, daß die Trommel zu einer Sendeantenne wird. Schließlich würden auch kleinste Differenzspannungen zu einem beschleunigten Verschleiß der Trommellager führen.Although such a high-frequency field is fundamentally can also be produced in a rotating steel drum by this forms the ground electrode and one inside the drum electrode fed by a high frequency generator the following problems arise: The entire high frequency load current would have to be from one rotating device part, namely the drum, removed will. The discharge via the drum bearings is insufficient, like corresponding experiments with High-frequency paper drying systems have shown. Here the derivation of the load current via the Dryer roller bearings. For a reliable Load current derivation would therefore have to be maintenance-intensive Slip rings are used. The danger remains exist that when the lowest contact resistance occurs the drum carries tension. For one thing, this is over Occupational safety reasons are not permitted and that the drum becomes a transmitting antenna. In the end even the smallest differential voltages become one accelerated wear of the drum bearings.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs beschriebenen Art so auszubilden, daß in der Trommel ein Hochfrequenzfeld erzeugbar ist, bei dem die vorbeschriebenen Probleme hinsichtlich der Laststromabführung mit einfachen Mitteln gänzlich eliminiert sind.The invention has for its object a device of the type described above so that in the Drum a high frequency field can be generated, in which the problems with load current dissipation are completely eliminated with simple means.

Zur Lösung dieser Aufgabe wird von einer Vorrichtung der im Oberbegriff des Anspruchs 1 genannten gattungsgemäßen Art ausgegangen, welche erfindungsgemäß die im kennzeichnenden Teil desselben angegebenen Merkmale aufweist.To solve this problem a device in Preamble of claim 1 generic type  assumed, which according to the invention is the characteristic in Has part of the same specified features.

Durch die erfindungsgemäße Ausbildung der Trommel als Zwischenelektrode, wobei Trommel, Lager und Antrieb auf gleichem Spannungsniveau liegen, entfällt das Erfordernis, den hochfrequenten Laststrom von einem rotierenden Bauteil auf ein stillstehendes Bauteil übertragen zu müssen, so daß auch alle sich daraus ergebenden Probleme nicht auftreten. Die elektrische Versorgung des Antriebsmotors kann problemlos über ein HF-Filter erfolgen, wie es beispielsweise bei Elektrodenheizungen in konventionellen Trocknern bereits eingesetzt wird.The inventive design of the drum as Intermediate electrode, with drum, bearing and drive on same voltage level, there is no need to the high-frequency load current from a rotating component to be transferred to a stationary component, so that also all problems arising from this do not occur. The electrical supply to the drive motor can be done easily via an HF filter, as is the case with Electrode heaters in conventional dryers already is used.

Das die Trommel, die Lagerung und den Antrieb isoliert umgebende Gehäuse bildet die Gegenelektrode und damit in besonders vorteilhafter Weise gleichzeitig eine Abschirmung.That isolates the drum, storage and drive surrounding housing forms the counter electrode and thus in shielding is particularly advantageous at the same time.

Zwischen der in die Trommel eingeführten stab- oder rohrförmigen Elektrode und der Trommel als Zwischenelektrode läßt sich eine Differenzspannung bilden, deren Größe von den Luftspaltabmessungen und von den dielektrischen Eigenschaften des zu behandelnden Schüttgutes abhängt und welche das für die Wärmebehandlung, beispielsweise Trocknung, des jeweiligen Schüttgutes erforderliche elektrische Feld verursacht.Between the rod or inserted into the drum tubular electrode and the drum as an intermediate electrode a differential voltage can be formed, the magnitude of which Air gap dimensions and dielectric properties depends on the bulk material to be treated and which that for the heat treatment, for example drying, of the respective Bulk electrical field required.

In der Zeichnung ist ein Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung schematisch in einem vertikalen Schnitt dargestellt:In the drawing, an embodiment is one Device according to the invention schematically in a vertical Section shown:

Eine das zu behandelnde Schüttgut aufnehmende Trommel 1 ist über eine Antriebswelle 2 und Stützrollen 3 in einem Lagerstuhl 4 gelagert. Die Antriebswelle 2 ist mit einem Elektromotor 5 gekuppelt, der über eine Konsole 6 gleichfalls vom Lagerstuhl 4 getragen wird und der über eine Leitung 7, die von einem Hochfrequenz-Filter 8 ausgeht, mit Strom versorgt wird.A drum 1 receiving the bulk material to be treated is mounted in a storage chair 4 via a drive shaft 2 and support rollers 3 . The drive shaft 2 is coupled to an electric motor 5 , which is likewise carried by the bearing bracket 4 via a bracket 6 and which is supplied with current via a line 7 , which starts from a high-frequency filter 8 .

Der Lagerstuhl 4 ist bodenseitig mit einer Isolationsplatte 9 versehen und nur über diese mittelbar mit einem die Vorrichtung umgebenden Gehäuse 10 verbunden.The bearing chair 4 is provided on the bottom side with an insulation plate 9 and is only indirectly connected to a housing 10 surrounding the device via this plate.

Das Gehäuse 10 ist aus zwei Gehäuseteilen 11 und 12 zusammengesetzt, wobei das einer stirnseitigen Be- und Entladeöffnung 13 der Trommel 1 gegenüberliegende Gehäuseteil 11 mit einem Hochfrequenzgenerator 14 ausgestattet ist, von dem aus eine Elektrode 15 in das Innere der Trommel 1 hineinreicht.The housing 10 is composed of two housing parts 11 and 12 , the housing part 11 opposite an end loading and unloading opening 13 of the drum 1 being equipped with a high-frequency generator 14 , from which an electrode 15 extends into the interior of the drum 1 .

Claims (2)

1. Vorrichtung zur Wärmebehandlung von Schüttgütern, bestehend aus einer um eine horizontale Achse rotierbaren, mit einer stirnseitigen Be- und Entladeöffnung versehenen Trommel, die von einem Gehäuse umgeben ist, das Lager- und Antriebseinrichtungen für die Trommel mitumschließt, dadurch gekennzeichnet, daß durch die Be- und Entladeöffnung (13) eine von einem Hochfrequenzgenerator (14) gespeiste Elektrode (15) in das Innere der eine Zwischenelektrode bildenden Trommel (1) einführbar ist, die mit ihren Lager- und Antriebseinrichtungen (2, 3, 4, 5) gegenüber dem eine Gegenelektrode bildenden Gehäuse (10) isoliert angeordnet ist.1. Device for the heat treatment of bulk goods, consisting of a rotatable about a horizontal axis, provided with an end loading and unloading drum, which is surrounded by a housing, which includes storage and drive devices for the drum, characterized in that by Loading and unloading opening ( 13 ) an electrode ( 15 ) fed by a high-frequency generator ( 14 ) can be inserted into the interior of the drum ( 1 ) forming an intermediate electrode, which is opposite with its bearing and drive devices ( 2 , 3 , 4 , 5 ) the housing ( 10 ) forming a counter electrode is arranged insulated. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß als Antriebseinrichtung für die Trommel (1) ein über ein Hochfrequenzfilter (8) mit Energie versorgter Elektromotor (5) vorgesehen ist, der auf einer Konsole (6) angeordnet ist, die von einem Lagerstuhl (4) getragen wird, der über eine Isolierung (9) auf dem Boden des Gehäuses (10) befestigt ist.2. Apparatus according to claim 1, characterized in that as a drive device for the drum ( 1 ) via a high-frequency filter ( 8 ) with an electric motor ( 5 ) is provided, which is arranged on a console ( 6 ) by a storage chair ( 4 ) is worn, which is attached to the bottom of the housing ( 10 ) via insulation ( 9 ).
DE19904013811 1990-04-29 1990-04-29 Heat treatment device for loose material - uses HF electrode inserted in rotary drum containing loose material Granted DE4013811A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19904013811 DE4013811A1 (en) 1990-04-29 1990-04-29 Heat treatment device for loose material - uses HF electrode inserted in rotary drum containing loose material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19904013811 DE4013811A1 (en) 1990-04-29 1990-04-29 Heat treatment device for loose material - uses HF electrode inserted in rotary drum containing loose material

Publications (2)

Publication Number Publication Date
DE4013811A1 true DE4013811A1 (en) 1991-10-31
DE4013811C2 DE4013811C2 (en) 1992-04-02

Family

ID=6405409

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19904013811 Granted DE4013811A1 (en) 1990-04-29 1990-04-29 Heat treatment device for loose material - uses HF electrode inserted in rotary drum containing loose material

Country Status (1)

Country Link
DE (1) DE4013811A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002062461A2 (en) * 2001-02-06 2002-08-15 Bruske, Frank Method and device for the production of particles from liquid starting materials

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941845A1 (en) * 1979-10-16 1981-04-30 Siemens AG, 1000 Berlin und 8000 München Capacitive HF drying oven for porous goods - has upper electrode formed from metal fabric or mesh resting on top of transported goods

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941845A1 (en) * 1979-10-16 1981-04-30 Siemens AG, 1000 Berlin und 8000 München Capacitive HF drying oven for porous goods - has upper electrode formed from metal fabric or mesh resting on top of transported goods

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002062461A2 (en) * 2001-02-06 2002-08-15 Bruske, Frank Method and device for the production of particles from liquid starting materials
WO2002062461A3 (en) * 2001-02-06 2003-10-09 Bruske Frank Method and device for the production of particles from liquid starting materials
US7311753B2 (en) 2001-02-06 2007-12-25 Frank Bruske Method and device for the production of particles from liquid starting materials

Also Published As

Publication number Publication date
DE4013811C2 (en) 1992-04-02

Similar Documents

Publication Publication Date Title
EP0339195B1 (en) Magnetic separator
DE2343458B2 (en) Drying apparatus
DE2106850A1 (en) Process for the treatment of work pieces in a glow discharge and apparatus for carrying out the process
DE2545592A1 (en) DRYING DEVICE FOR RAIL-SHAPED MATERIAL
EP3607635A1 (en) Method for producing a system for inductively transmitting energy to a mobile part and device for carrying out the method
DE4013811C2 (en)
DE2108389A1 (en) Method and device for the heat treatment of petroleum coke
EP0421188B1 (en) Pusher centrifuge
EP0702598B1 (en) Impact crusher
DE3345303C2 (en)
AT384562B (en) Screening drum
DE19818183C2 (en) Device and method for separating the components of a product containing at least two plastic substances with different softening temperatures
DE3321464C2 (en)
WO1998050626A2 (en) Method and device for separating the liquid contained in a suspension from the dispersed material in the suspension
DE19707601C1 (en) Circular mangle
DE681809C (en) Electric rotary kiln for melting quartz and other difficult-to-melt materials
DE4230384C2 (en) Dewatering press for rejects from the waste paper processing that can be dewatered by compression
DE4225196C1 (en) Electromagnetic screening device for electrical and mechanical rotary coupling - uses electrically conductive plastics ring seal in each annular gap between rotating and stationary coupling halves
DE2034415C3 (en) Crusher
AT234498B (en) Method and device for the regular, continuous fine perforation of film webs, in particular cigarette paper
US2644073A (en) Dielectric heating with rotatory work-receiving element
EP0038909A1 (en) Pneumatic separator
DE3135879A1 (en) Device for the uniform and/or low-distortion inductive hardening of crank pins
DE1222515B (en) Rotary drums for treatment are called good things
DE2226347A1 (en) Bulk material handling plant - esp for roasting/drying of coffee or cocoa beans

Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee