EP2322013B1 - Mischvorrichtung mit induktionsheizung - Google Patents

Mischvorrichtung mit induktionsheizung Download PDF

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Publication number
EP2322013B1
EP2322013B1 EP09780661A EP09780661A EP2322013B1 EP 2322013 B1 EP2322013 B1 EP 2322013B1 EP 09780661 A EP09780661 A EP 09780661A EP 09780661 A EP09780661 A EP 09780661A EP 2322013 B1 EP2322013 B1 EP 2322013B1
Authority
EP
European Patent Office
Prior art keywords
container
heating
mixing device
wall
heating 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.)
Active
Application number
EP09780661A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2322013A1 (de
Inventor
Stefan Gerl
Andreas Seiler
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.)
Maschinenfabrik Gustav Eirich GmbH and Co KG
Original Assignee
Maschinenfabrik Gustav Eirich GmbH and Co KG
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 Maschinenfabrik Gustav Eirich GmbH and Co KG filed Critical Maschinenfabrik Gustav Eirich GmbH and Co KG
Priority to PL09780661T priority Critical patent/PL2322013T3/pl
Publication of EP2322013A1 publication Critical patent/EP2322013A1/de
Application granted granted Critical
Publication of EP2322013B1 publication Critical patent/EP2322013B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/18—Plants for preparing mould materials
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00—Mixers with rotating receptacles
    • B01F29/60—Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers
    • B01F29/64—Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers with stirring devices moving in relation to the receptacle, e.g. rotating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/45—Closures or doors specially adapted for mixing receptacles; Operating mechanisms therefor
    • B01F35/451—Closures or doors specially adapted for mixing receptacles; Operating mechanisms therefor by rotating them about an axis parallel to the plane of the opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/75—Discharge mechanisms
    • B01F35/754—Discharge mechanisms characterised by the means for discharging the components from the mixer
    • B01F35/7548—Discharge mechanisms characterised by the means for discharging the components from the mixer using tilting or pivoting means for emptying the mixing receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/92—Heating or cooling systems for heating the outside of the receptacle, e.g. heated jackets or burners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
    • B22C5/0409—Blending, mixing, kneading or stirring; Methods therefor
    • B22C5/044—Devices having a vertical stirrer shaft in a fixed receptacle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/04—Heating arrangements using electric heating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00—Mixers with rotating receptacles
    • B01F29/40—Parts or components, e.g. receptacles, feeding or discharging means
    • B01F29/403—Disposition of the rotor axis
    • B01F29/4033—Disposition of the rotor axis inclined

Definitions

  • the present invention relates to a mixing device with a container for receiving mixed material, a mixing tool arranged in the interior of the container and a heating device for heating the mixed material.
  • the mixing i.
  • the combination of at least two starting materials with different properties into a mixture of substances is a fundamental operation in mechanical engineering.
  • mixing devices With the help of a mixing device the highest possible homogeneity of the new substance should be achieved.
  • mixing devices with a rotating mixing container are used, for example.
  • At least one mixing tool is arranged eccentrically in the interior of the container in the rule. If the container rotates, the mixed material received in the container is transported to the mixing tool and mixed with the aid of the mixing tool. With such mixers materials of any type and consistency can be processed quickly and in high quality.
  • some mixing device on a heating jacket, which surrounds the container wall and is in contact therewith. Heat energy can then be supplied to the mixing container via the heating jacket.
  • the heating jacket is depending on the heat transfer medium either as a double jacket for hot water or Thermal oil heating or at higher design pressures for steam heating as a wart jacket or with welded-on half pipes.
  • the known solutions are limited in terms of their maximum wall temperature by the maximum allowable temperature of the heat transfer medium or steam heating by the necessary compressive strength of the double jacket.
  • the object of the present invention to provide a mixing device of the type mentioned, which allows the fastest possible heating of the mixed material, preferably also to temperatures greater than 200 ° C.
  • the container consists at least partially of an electrically conductive, preferably metallic material and the heater has at least one stimulable with an alternating electric field coil, which is arranged such that by the resulting change in current flow magnetic field change in the electrically conductive Material of the container eddy currents are generated.
  • These eddy currents ensure heating of the container.
  • This inductive heating of the container allows a targeted and direct heating of the container and thus the mixed material, without first a heat transfer medium must be heated.
  • the achievable temperature increase is limited only by the performance of the coil and not by the chemical-physical properties of the heat transfer medium.
  • At least one stripping device which is movable relative to the container wall, is provided in the interior of the container in the vicinity of the container wall and / or the container bottom.
  • the stripping device is static, so that the necessary relative movement is generated only by the rotation of the container.
  • the stripping device ensures a continuous vertical component of the mixed material flow and prevents buildup or caking on the container wall and / or bottom.
  • the emptying process is accelerated at the end of the mixing time.
  • the stripping device has a temperature sensor for detecting the temperature of the mixed material.
  • the stripping device has proven to be particularly suitable to receive a temperature sensor to detect the temperature of the mix since the scraper is in direct contact with the mix.
  • the mixing product temperature determination can also be effected via a product-contacting or non-contact temperature sensor introduced separately from the stripping apparatus into the mixing chamber.
  • At least two separately controllable heating devices are present, wherein preferably both heaters each have at least one excitable with an alternating electric field coil, which is arranged such that by the change in current flow resulting magnetic field change in the electrically conductive material the container eddy currents are generated.
  • heating device for heating the mixing tool and / or the stripping device could also be provided.
  • the power of the heating device designed for heating the container wall can be the same size but also larger or smaller than the output of the heating device designed for heating the container bottom.
  • the power distribution between the wall and the floor preferably corresponds approximately to the area ratio between the preferably cylindrical wall surface to be directly heated and the surface to be heated directly, preferably the annular surface or the circular surface of the container bottom.
  • the power distribution to the effective heat transfer surface is similar to the mix inside the container.
  • the bottom surface In a vertical mixing mixing vessel, the bottom surface is usually almost completely covered with material. The heat flow thus takes place over the entire heated floor area.
  • the horizontal inclined mixing container with a stationary stripping device depending on the arrangement of the stripping up to about 10-20% of the bottom surface can not be directly applied with product.
  • the container is rotationally symmetrical, wherein it is provided in a preferred embodiment that the heating device is arranged to heat the container bottom such that an outer annular portion of the container bottom is not substantially heated by the heater, wherein the annular portion preferably has a width which is greater than 5% and more preferably greater than 10% of the container diameter.
  • the stimulable coil is arranged parallel to the container bottom, but not with respect to the described annular portion. This ensures that there is no overheating of the container in the area of the container corner, when at the same time the container wall is heated with a second heater and concentrate the field lines of the two coils in the corner of the container.
  • the heating means for heating the container bottom may be arranged so that an inner circular portion of the container bottom is not substantially heated by the heating device, the circular portion preferably having a diameter greater than 30%, more preferably greater than 50% of the container diameter is.
  • the stimulable coil is disposed in a plane substantially parallel to the container bottom, however, an inner circular portion and an outer annular portion having no coil windings to ensure that neither container corner nor the center of the container bottom are heated directly.
  • the drive region is additionally shielded from the electromagnetic alternating field of the coil.
  • a container closure could be inductively heated.
  • the heater can be used for heating the container wall may be arranged so that a lower cylinder jacket-shaped portion of the container wall is not substantially heated by the heater, wherein the lower cylinder jacket-shaped portion preferably has a height which is greater than 5%, more preferably greater than 10% of the container wall height.
  • the heating device for heating the container wall may be arranged such that an upper cylinder jacket-shaped portion of the container wall is not substantially heated by the heater, wherein the upper cylinder jacket-shaped portion preferably has a height which is greater than 10%, more preferably greater than 20% of Container wall height is.
  • the mixing container is not completely filled with mix so that is prevented by the action described that the part of the container wall that is not in contact with the mix is heated directly.
  • the upper cylinder jacket-shaped portion of the container wall can be made of an electrically non-conductive material and / or a material with very low thermal conductivity.
  • an electrically non-conductive, preferably non-metallic insulation element which is preferably attached to the container outside, is present.
  • the insulation element is best glued to the container outside. This insulating element serves to reduce the heat emission of the container to the environment. This saves energy and reduces the expenses for protection against contact.
  • the windings of the coil for the heating device associated with the container bottom may for example be arranged in the vicinity of the outside of the container bottom and run spirally around the axis of rotation of the container. This arrangement ensures a uniform heating of the container bottom.
  • the windings may also be arranged only in a circular segment. Since the container rotates relative to the windings, then the entire container bottom is heated. Although this arrangement leads to a less uniform heating of the container bottom, but it can be easily retrofitted to existing mixing devices.
  • the center angle of the circular segment is preferably less than 180 ° and more preferably less than 90 ° and most preferably less than 45 °.
  • the heater associated with the container wall can be arranged in the vicinity of the container wall and extend substantially concentrically around the container wall, so that substantially the entire container wall, with the exception of the free upper and lower wall portions, can be heated.
  • the windings may also be arranged only in the region of a container wall section.
  • the rotation of the container ensures that the entire wall can be heated. This arrangement can be retrofitted to existing mixing devices more easily.
  • a substantially L-shaped heating element could be provided, in each of which a coil is arranged in the two L-legs.
  • This L-shaped heating element is arranged with a leg parallel to the container wall and with the other leg parallel to the container bottom.
  • At least one temperature sensor is provided for measuring the container bottom temperature, wherein the temperature sensor is preferably an infrared sensor and detects the temperature on the outside of the container bottom.
  • At least one temperature sensor may be provided for measuring the container wall, wherein here too the temperature sensor is preferably an infrared sensor and detects the temperature on the outside of the container wall.
  • the insulation may have recesses, so that with the aid of the infrared sensors, the temperature of the container bottom and / or the container wall can be detected directly.
  • the control is preferably carried out such that the temperature difference between the container bottom on the one hand and the container wall on the other hand is as small as possible.
  • FIG. 1 a first embodiment of the mixer 1 according to the invention is shown.
  • the mixer 1 has a container 2 and a mixing tool 3 arranged in the container 2, which can be driven by means of a motor 4.
  • the mixing tool 3 is arranged asymmetrically in the container 2.
  • the container 2 is arranged within a housing 7 with a housing cover 6. Also visible is a scraper 5, which is attached to the housing cover 6.
  • the container 2 is for example made of metallic material and surrounded by an insulating layer 8.
  • two coils 9 and 10 are arranged, which can be impressed via the leads 11 and 12 of the power supply 13, an AC voltage.
  • corresponding cooling media for heat dissipation of the power loss in the coil can be transported via the same or separately designed supply lines.
  • the transmitted over the supply AC voltage ensures that eddy currents are generated in the container 2, which in turn lead to heating of the container.
  • Both coils 9, 10 are shielded at least to the outside, preferably also towards the edges by means of a ferrite shield 14. This ferrite shield 14 serves to avoid possible eddy current generation and thus heating outside the container.
  • the heating device 9 associated with the container wall does not extend over the entire container height. An upper portion of the container wall, which is generally not charged with mix, is not heated. In the same way, the heating device 9 does not extend to the container corner in order to avoid excessive heating of the container in the corner.
  • the heater 10 for the container bottom is also not executed to the corner.
  • a circular central area of the container, over which the container is generally driven, is not heated.
  • a first temperature sensor 15 is provided on the scraper 5 in order to determine the temperature of the mixed material.
  • infrared temperature sensors are in the range the container wall and arranged in the region of the container bottom.
  • the insulation 8 has corresponding recesses.
  • FIG. 2 a second embodiment of the mixing device according to the invention is shown.
  • This embodiment differs from that in FIG. 1 shown embodiment only in that for heating the container wall two heaters 9 ', 9 "are provided, both of which can be controlled separately from each other via the connections 12', 12" of the power supply 13.
  • two temperature sensors 17 'and 17 are also provided for detecting the container wall temperature at two different positions. ⁇ br/> ⁇ br/> With this arrangement, the heating outputs can be individually adjusted via the height of the wall to the heat output transmitted inside the container.
  • FIG. 3 a third embodiment of the mixer according to the invention is shown. It can be seen here that the mixer can be tilted about a horizontal axis. For emptying the mixer, therefore, the housing cover 6 is first tilted out of the container together with the mixing tool 3 and the stripping device 5. Then the container is tilted together with mix to the side, so that the mix is transferred in a provided for this purpose car 18.
  • the L-shaped heater consists in the case shown only of a coil, so that the wall and the bottom of the mixing container are not individually adjustable.
  • a fixed, non-controllable power distribution between wall and floor can be realized for example via a different number of windings of the coil in wall and floor.
  • the corner areas between wall and floor can be substantially excluded from the direct heating, in which the corner area is recessed by the windings accordingly. This represents a particularly cost-effective embodiment of the invention.
  • FIG. 4 a fourth embodiment of the invention is shown. Unlike in the FIGS. 1 and 2 In this embodiment, the coils extend around the entire container or over the entire bottom surface. This embodiment produces the most uniform heating of the container 2. For most applications, however, the arrangement according to the embodiments 1 and 2 is sufficient, especially since this can be retrofitted in existing mixing devices.

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  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Engineering & Computer Science (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Induction Heating (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Accessories For Mixers (AREA)
  • Furnace Details (AREA)
EP09780661A 2008-08-07 2009-07-15 Mischvorrichtung mit induktionsheizung Active EP2322013B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09780661T PL2322013T3 (pl) 2008-08-07 2009-07-15 Urządzenie do mieszania z podgrzewaniem indukcyjnym

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008041104A DE102008041104A1 (de) 2008-08-07 2008-08-07 Mischvorrichtung mit Induktionsheizung
PCT/EP2009/059098 WO2010015496A1 (de) 2008-08-07 2009-07-15 Mischvorrichtung mit induktionsheizung

Publications (2)

Publication Number Publication Date
EP2322013A1 EP2322013A1 (de) 2011-05-18
EP2322013B1 true EP2322013B1 (de) 2012-01-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09780661A Active EP2322013B1 (de) 2008-08-07 2009-07-15 Mischvorrichtung mit induktionsheizung

Country Status (17)

Country Link
US (1) US9295109B2 (ru)
EP (1) EP2322013B1 (ru)
JP (1) JP5285155B2 (ru)
KR (1) KR101579142B1 (ru)
CN (1) CN102057748B (ru)
AT (1) ATE540557T1 (ru)
AU (1) AU2009278117B2 (ru)
BR (1) BRPI0916875B1 (ru)
CA (1) CA2723906C (ru)
DE (1) DE102008041104A1 (ru)
DK (1) DK2322013T3 (ru)
ES (1) ES2379687T3 (ru)
PL (1) PL2322013T3 (ru)
RU (1) RU2512874C2 (ru)
UA (1) UA99536C2 (ru)
WO (1) WO2010015496A1 (ru)
ZA (1) ZA201008130B (ru)

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PL1508376T3 (pl) * 2003-08-22 2008-09-30 Eirich Maschf Gustav Gmbh & Co Kg Młyn z mieszadłem i rurą nurnikową do odsysania i rozdzielania materiału mielonego i pomocniczych elementów rozdrabniających
CN2691207Y (zh) * 2004-03-18 2005-04-06 中国建筑第八工程局工业设备安装公司一公司 电磁感应多功能发热体及装置
DE102004020790A1 (de) 2004-04-28 2005-11-24 Maschinenfabrik Gustav Eirich Gmbh & Co. Kg Verfahren und Vorrichtung zum kontinuierlichen geregelten Austrag von Feststoffen
JP2006017348A (ja) * 2004-06-30 2006-01-19 Kenzo Takahashi 攪拌装置付溶解炉及び攪拌装置
JP2006061183A (ja) 2004-08-24 2006-03-09 Nakai Kikai Kogyo Kk 各種食材の万能攪拌装置
US20060044935A1 (en) * 2004-08-25 2006-03-02 Benelli Brandon P Method and system for producing a temperature profile in a food preparation container
RU2303861C2 (ru) * 2005-08-12 2007-07-27 Федеральное государственное образовательное учреждение высшего профессионального образования "Чувашский государственный университет им. И.Н. Ульянова" Устройство для нагрева жидкости
RU59929U1 (ru) * 2006-06-01 2006-12-27 Государственное образовательное учреждение высшего профессионального образования "Комсомольский-на-Амуре государственный технический университет" (ГОУВПО "КнАГТУ") Устройство для нагрева и перемещения жидкости и/или газа
CN102959618B (zh) 2010-06-28 2015-08-05 三菱电机株式会社 声音识别装置

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CN102057748A (zh) 2011-05-11
ES2379687T3 (es) 2012-04-30
UA99536C2 (ru) 2012-08-27
ZA201008130B (en) 2012-03-28
JP2011529786A (ja) 2011-12-15
ATE540557T1 (de) 2012-01-15
JP5285155B2 (ja) 2013-09-11
CN102057748B (zh) 2015-11-25
AU2009278117B2 (en) 2014-02-06
US20110116340A1 (en) 2011-05-19
DE102008041104A9 (de) 2010-05-20
US9295109B2 (en) 2016-03-22
CA2723906A1 (en) 2010-02-11
KR20110039483A (ko) 2011-04-18
BRPI0916875B1 (pt) 2019-04-24
DE102008041104A1 (de) 2010-02-11
RU2512874C2 (ru) 2014-04-10
CA2723906C (en) 2015-04-07
EP2322013A1 (de) 2011-05-18
AU2009278117A1 (en) 2010-02-11
DK2322013T3 (da) 2012-02-20
BRPI0916875A2 (pt) 2016-02-10
WO2010015496A1 (de) 2010-02-11
RU2011108213A (ru) 2012-09-20
KR101579142B1 (ko) 2015-12-21
PL2322013T3 (pl) 2012-05-31

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