EP0498295A1 - Mixer-dryer - Google Patents

Mixer-dryer Download PDF

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Publication number
EP0498295A1
EP0498295A1 EP92101499A EP92101499A EP0498295A1 EP 0498295 A1 EP0498295 A1 EP 0498295A1 EP 92101499 A EP92101499 A EP 92101499A EP 92101499 A EP92101499 A EP 92101499A EP 0498295 A1 EP0498295 A1 EP 0498295A1
Authority
EP
European Patent Office
Prior art keywords
mixing container
magnetrons
product
mixer
dryer
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Withdrawn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
EP92101499A
Other languages
German (de)
French (fr)
Inventor
Jürgen Dipl.-Ing. Oess
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.)
Mannesmann Demag Krauss Maffei GmbH
Original Assignee
Krauss Maffei 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 Krauss Maffei AG filed Critical Krauss Maffei AG
Publication of EP0498295A1 publication Critical patent/EP0498295A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/95—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis
    • B01F27/953—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis using only helical stirrers
    • 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
    • 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
    • F26B11/12—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
    • B01F27/1143—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections screw-shaped, e.g. worms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/23—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis
    • B01F27/232—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes
    • B01F27/2324—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes planetary

Definitions

  • the invention relates to a mixer dryer according to the preamble of patent claim 1.
  • Such a dryer is usually heated via the housing and the mixing screw.
  • the heat required to dry the product is brought into the product by contact with the heating surfaces of the housing and the mixing screw.
  • the mixer dryer has the option of introducing energy into the product via microwaves, in which it is converted into heat.
  • European patent application 0 306 563 a cone mixer dryer is known in which the mixer screw is driven from above by means of a drive arranged centrally in the cover via an angle lever. Between the drive and further built-in components arranged in the cover, a microwave generator, known as a magnetron, is provided, through which microwaves are applied to the material to be dried in the mixer dryer.
  • the material to be dried is partially covered by the rotating angle lever so that it is not constantly and evenly reached by the microwaves emitted by the magnetron.
  • the space available for the magnetron is very restricted by the drive unit.
  • the invention is therefore based on the object of impinging a mixer dryer as freely and as uniformly as possible with microwaves in order to achieve a shorter drying time and a more gentle drying.
  • the invention thus enables a particularly effective drying of the product in that, in addition to heating the container and the mixing screw, energy can be introduced into the product without hindrance via microwaves.
  • a cylindrical intermediate ring is provided between the mixing container and the lid, on which one or more magnetrons are arranged.
  • the intermediate ring enables the attachment of any number of magnetrons distributed over the circumference of the container without obstruction or constriction of the parts arranged on the lid, such as inlet connectors, vapor filters and sight glasses.
  • the microwave exposure can advantageously take place via one or more magnetrons and coaxial lines, as a result of which the number of magnetrons can be reduced.
  • coaxial lines can also start from one magnetron.
  • the combined contact and microwave drying can greatly shorten the drying time compared to normal vacuum drying and the product can be dried more gently when the internal moisture evaporates.
  • a vapor filter 3 and a product inlet nozzle 4 are arranged on the cover 2.
  • a product discharge nozzle 5 and a drive 6 are provided which drive an overhung mixing screw 7.
  • a magnetron 8 is additionally arranged on the cover 2.
  • an intermediate ring 9 is inserted between the mixing container 1 and the lid 2, on which two magnetrons 10 and 11 and associated coaxial lines 12 and 13 are provided.

Abstract

To improve the drying of the product in a mixer-dryer, in the case of a heatable mixing screw (7) which is driven from below and is rotatable about its axis and the mid-axis of the heatable mixing container (1), one or more magnetrons (8,10,11) for generating microwaves are arranged, to additionally heat the product, in the upper region of the mixing container. <??>To achieve a better distribution of the microwave radiation, it is proposed that a cylindrical intermediate ring (9) be provided between the mixing container (1) and the cover (2), one or more magnetrons (10, 11) being arranged on it and advantageously connected with respective coaxial ducts (12, 13) through which the microwaves are conducted into the dryer for additional heating of the product. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Mischertrockner gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a mixer dryer according to the preamble of patent claim 1.

Die Beheizung eines derartigen Trockners erfolgt in der Regel über das Gehäuse und die Mischschnecke. Die zur Trocknung des Produkts benötigte Wärme wird durch Kontakt mit den Heizflächen des Gehäuses und der Mischschnecke in das Produkt eingebracht. Zusätzlich besteht beim Mischertrockner die Möglichkeit, Energie über Mikrowellen in das Produkt einzubringen, in welchem sie in Wärme umgesetzt wird. Nach der Europäischen Patentanmeldung 0 306 563 ist ein Kegelmischertrockner bekannt, bei dem die Mischerschnecke mittels eines zentrisch im Deckel angeordneten Antriebs über einen Winkelhebel von oben her angetrieben wird. Zwischen dem Antrieb und weiteren im Deckel angeordneten Einbauteilen ist ein als Magnetron bezeichneter Mikrowellengenerator vorgesehen, durch welches das im Mischertrockner zu trocknende Gut mit Mikrowellen beaufschlagt wird.Such a dryer is usually heated via the housing and the mixing screw. The heat required to dry the product is brought into the product by contact with the heating surfaces of the housing and the mixing screw. In addition, the mixer dryer has the option of introducing energy into the product via microwaves, in which it is converted into heat. According to European patent application 0 306 563, a cone mixer dryer is known in which the mixer screw is driven from above by means of a drive arranged centrally in the cover via an angle lever. Between the drive and further built-in components arranged in the cover, a microwave generator, known as a magnetron, is provided, through which microwaves are applied to the material to be dried in the mixer dryer.

Durch den sich drehenden Winkelhebel wird das zu trocknende Gut teilweise abgedeckt, so daß es von den vom Magnetron ausgesendeten Mikrowellen nicht ständig und gleichmäßig erreicht wird. Außerdem ist der für das Magnetron zur Verfügung stehende Raum durch das Antriebsaggregat sehr eingeengt.The material to be dried is partially covered by the rotating angle lever so that it is not constantly and evenly reached by the microwaves emitted by the magnetron. In addition, the space available for the magnetron is very restricted by the drive unit.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Mischertrockner möglichst ungehindert und gleichmäßig mit Mikrowellen zu beaufschlagen, um hierdurch eine kürzere Trocknungszeit und eine schonendere Trocknung zu erreichen.The invention is therefore based on the object of impinging a mixer dryer as freely and as uniformly as possible with microwaves in order to achieve a shorter drying time and a more gentle drying.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. Die Erfindung ermöglicht somit eine besonders wirksame Trocknung des Produkts dadurch, daß zusätzlich zur Beheizung des Behälters und der Mischschnecke Energie über Mikrowellen unbehindert in das Produkt eingebracht werden kann.This object is achieved by the features of patent claim 1. The invention thus enables a particularly effective drying of the product in that, in addition to heating the container and the mixing screw, energy can be introduced into the product without hindrance via microwaves.

In vorteilhafter Ausbildung der Erfindung ist zwischen dem Mischbehälter und dem Deckel ein zylindrischer Zwischenring vorgesehen, an dem ein oder mehrere Magnetrone angeordnet sind. Der Zwischenring ermöglicht ohne Behinderung oder Einengung der auf dem Deckel angeordneten Teile, wie Eintragstutzen, Brüdenfilter und Schaugläser, die Anbringung beliebig vieler über den Behälterumfang verteilter Magnetrone. Auf diese Weise kann eine gezielte und besonders intensive Beaufschlagung des Produkts mit Mikrowellen erfolgen. Um eine besonders gute Verteilung der Strahlung zu erreichen, kann die Mikrowellenbeaufschlagung vorteilhaft über ein oder mehrere Magnetrone und Koaxialleitungen erfolgen, wodurch die Anzahl der Magnetrone verringert werden kann. Es können dabei auch mehrere Koaxialleitungen von einem Magnetron ausgehen.In an advantageous embodiment of the invention, a cylindrical intermediate ring is provided between the mixing container and the lid, on which one or more magnetrons are arranged. The intermediate ring enables the attachment of any number of magnetrons distributed over the circumference of the container without obstruction or constriction of the parts arranged on the lid, such as inlet connectors, vapor filters and sight glasses. In this way, a targeted and particularly intensive exposure of the product to microwaves can take place. In order to achieve a particularly good distribution of the radiation, the microwave exposure can advantageously take place via one or more magnetrons and coaxial lines, as a result of which the number of magnetrons can be reduced. Several coaxial lines can also start from one magnetron.

Durch die kombinierte Kontakt- und Mikrowellentrocknung kann die Trocknungszeit gegenüber normaler Vakuumtrocknung stark verkürzt und das Produkt bei der Verdampfung der Innenfeuchte schonender getrocknet werden.The combined contact and microwave drying can greatly shorten the drying time compared to normal vacuum drying and the product can be dried more gently when the internal moisture evaporates.

In der Zeichnung sind zwei Ausführungsbeispiele der Erfindung dargestellt. Es zeigen:

Fig. 1
einen Mischertrockner mit einem im Deckel angeordneten Magnetron,
Fig. 2
einen Mischertrockner mit zwei an einem Zwischenring angeordneten Magnetronen mit je einer zugehörigen Koaxialleitung.
Two exemplary embodiments of the invention are shown in the drawing. Show it:
Fig. 1
a mixer dryer with a magnetron arranged in the lid,
Fig. 2
a mixer dryer with two magnetrons arranged on an intermediate ring, each with an associated coaxial line.

Der Mischertrockner nach Fig. 1 und 2 besteht aus einem nach oben konisch erweiterten Mischbehälter 1, der durch einen Deckel 2 abgeschlossen ist. Auf dem Deckel 2 sind ein Brüdenfilter 3 und ein Produkteintragstutzen 4 angeordnet. Im unteren Teil des Mischbehälters 1 ist ein Produktaustragstutzen 5 und ein Antrieb 6 vorgesehen, der eine fliegend gelagerte Mischschnecke 7 antreibt.1 and 2 consists of an upwardly flared mixing container 1, which is closed by a lid 2. A vapor filter 3 and a product inlet nozzle 4 are arranged on the cover 2. In the lower part of the mixing container 1, a product discharge nozzle 5 and a drive 6 are provided which drive an overhung mixing screw 7.

Gemäß Fig. 1 ist zusätzlich auf dem Deckel 2 ein Magnetron 8 angeordnet.1, a magnetron 8 is additionally arranged on the cover 2.

Nach Fig. 2 ist zwischen dem Mischbehälter 1 und dem Deckel 2 ein Zwischenring 9 eingesetzt, an dem zwei Magnetrone 10 und 11 sowie zugehörige Koaxialleitungen 12 und 13 vorgesehen sind.2, an intermediate ring 9 is inserted between the mixing container 1 and the lid 2, on which two magnetrons 10 and 11 and associated coaxial lines 12 and 13 are provided.

Claims (5)

Mischertrockner mit einem nach oben konisch erweiterten, beheizbaren und durch einen Deckel oben geschlossenen Mischbehälter, einer im unteren Bereich des Mischbehälters angeordneten Produktauslaßöffnung und einer beheizbaren Mischschnecke, gekennzeichnet durch eine an sich bekannte, von unten angetriebene Mischschnecke (7), die um ihre Achse und um die Mittelachse des Mischbehälters (1) drehbar ist, wobei im oberen Bereich des Mischbehälters (1) ein oder mehrere Magnetrone (8,10 u. 11) zur Erzeugung von Mikrowellen angeordnet sind.Mixer dryer with an upwardly conical, heatable and closed by a lid at the top of the mixing container, a product outlet opening arranged in the lower region of the mixing container and a heated mixing screw, characterized by a known, driven from below mixing screw (7) which about its axis and is rotatable about the central axis of the mixing container (1), one or more magnetrons (8, 10 and 11) for generating microwaves being arranged in the upper region of the mixing container (1). Mischertrockner nach Anspruch 1, dadurch gekennzeichnet, daß ein oder mehrere Magnetrone (8) im Deckel (2) des Mischbehälters (1) angeordnet sind.Mixer dryer according to claim 1, characterized in that one or more magnetrons (8) are arranged in the lid (2) of the mixing container (1). Mischertrockner nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß zwischen dem Mischbehälter (1) und dem Deckel (2) ein zylindrischer Zwischenring (9) vorgesehen ist, an dem ein oder mehrere Magnetrone (10,11) angeordnet sind.Mixer dryer according to claim 1 or 2, characterized in that a cylindrical intermediate ring (9) is provided between the mixing container (1) and the cover (2), on which one or more magnetrons (10, 11) are arranged. Mischertrockner nach Anspruch 3, dadurch gekennzeichnet, daß der Zwischenring (9) mittels einer lösbaren Flanschverbindung mit dem Deckel (2) und dem Mischbehälter (1) verbunden ist.Mixer dryer according to claim 3, characterized in that the intermediate ring (9) is connected to the cover (2) and the mixing container (1) by means of a releasable flange connection. Mischertrockner nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß ein oder mehrere Magnetrone (10,11) mit einer oder mehreren Koaxialleitungen (12,13) an dem Zwischenring (9) angeordnet sind.Mixer dryer according to claim 3 or 4, characterized in that one or more magnetrons (10, 11) with one or more coaxial lines (12, 13) are arranged on the intermediate ring (9).
EP92101499A 1991-02-06 1992-01-30 Mixer-dryer Withdrawn EP0498295A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4103455 1991-02-06
DE4103455A DE4103455A1 (en) 1991-02-06 1991-02-06 MIXER DRYERS
DE9116792U DE9116792U1 (en) 1991-02-06 1991-02-06 Mixer dryer

Publications (1)

Publication Number Publication Date
EP0498295A1 true EP0498295A1 (en) 1992-08-12

Family

ID=25900777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92101499A Withdrawn EP0498295A1 (en) 1991-02-06 1992-01-30 Mixer-dryer

Country Status (4)

Country Link
US (1) US5255444A (en)
EP (1) EP0498295A1 (en)
JP (1) JPH0560463A (en)
DE (2) DE9116792U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009035428A1 (en) * 2007-09-11 2009-03-19 'technological Park 'institute For Monocrystals', Close Joint-Stock Company A dryer for free-flowing dielectric materials
KR100966104B1 (en) * 2008-05-09 2010-06-28 이성민 The microwave screw dryer with heating system

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4217376A1 (en) * 1992-05-26 1993-05-27 Peter Achterberg Laundry dryer with reversingly rotating drum - uses microwaves to aid in the drying process
DE19507621B4 (en) * 1994-03-18 2007-08-09 Volkswagen Ag Shift lever operation sensor
US6011249A (en) * 1997-08-12 2000-01-04 Chung; Jing Yau Microwave oven with hot plate and food stirrer
RU2158175C1 (en) * 2000-02-07 2000-10-27 Егоров Юрий Михайлович Process of mixing of liquid substances
KR101034955B1 (en) * 2008-08-29 2011-05-17 주식회사 포스코 Apparatus and method for removing humidity of sintered ore material
CN110425846A (en) * 2019-07-09 2019-11-08 江苏中海华核环保有限公司 It is a kind of for handling the cone drier of spent resin with radionuclide
CN110425822A (en) * 2019-08-26 2019-11-08 安徽金锡机械科技有限公司 A kind of crop dryer tempering layer microwave drier

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0187173A1 (en) * 1984-12-31 1986-07-16 Isem B.V. A process and apparatus for drying and homogenisation of material containing liquids
EP0306563A1 (en) * 1987-09-10 1989-03-15 Hosokawa Micron Europe B.V. Apparatus for drying material which is mixed with a solvent
EP0312741A2 (en) * 1987-08-29 1989-04-26 Nissui Kako Co., Ltd. Method and apparatus for the microwave drying of plastic material
EP0403951A1 (en) * 1989-06-23 1990-12-27 Krauss-Maffei Aktiengesellschaft Mixer
EP0437267A1 (en) * 1990-01-11 1991-07-17 Shoji Nakagomi Plastic drying apparatus

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US3777095A (en) * 1972-05-15 1973-12-04 Tokyo Shibaura Electric Co Microwave heating apparatus
US3775863A (en) * 1972-07-20 1973-12-04 Day H Co Method and apparatus for drying particulate materials
US3834038A (en) * 1972-09-14 1974-09-10 Gammaflux Inc Method for drying moldable resins
US4906290A (en) * 1987-04-28 1990-03-06 Wollongong Uniadvice Limited Microwave irradiation of composites
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Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0187173A1 (en) * 1984-12-31 1986-07-16 Isem B.V. A process and apparatus for drying and homogenisation of material containing liquids
EP0312741A2 (en) * 1987-08-29 1989-04-26 Nissui Kako Co., Ltd. Method and apparatus for the microwave drying of plastic material
EP0306563A1 (en) * 1987-09-10 1989-03-15 Hosokawa Micron Europe B.V. Apparatus for drying material which is mixed with a solvent
EP0403951A1 (en) * 1989-06-23 1990-12-27 Krauss-Maffei Aktiengesellschaft Mixer
EP0437267A1 (en) * 1990-01-11 1991-07-17 Shoji Nakagomi Plastic drying apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009035428A1 (en) * 2007-09-11 2009-03-19 'technological Park 'institute For Monocrystals', Close Joint-Stock Company A dryer for free-flowing dielectric materials
KR100966104B1 (en) * 2008-05-09 2010-06-28 이성민 The microwave screw dryer with heating system

Also Published As

Publication number Publication date
DE9116792U1 (en) 1993-11-04
US5255444A (en) 1993-10-26
JPH0560463A (en) 1993-03-09
DE4103455A1 (en) 1992-08-13

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