EP0005552A2 - Dispositif de chauffage et de mélange de matériaux de construction - Google Patents

Dispositif de chauffage et de mélange de matériaux de construction Download PDF

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Publication number
EP0005552A2
EP0005552A2 EP79101531A EP79101531A EP0005552A2 EP 0005552 A2 EP0005552 A2 EP 0005552A2 EP 79101531 A EP79101531 A EP 79101531A EP 79101531 A EP79101531 A EP 79101531A EP 0005552 A2 EP0005552 A2 EP 0005552A2
Authority
EP
European Patent Office
Prior art keywords
mixing
heating
frequency
building
building materials
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Withdrawn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
EP79101531A
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German (de)
English (en)
Other versions
EP0005552A3 (fr
Inventor
Bruno Granella
Gerhard Dr. Sc. Techn. Schwickardi
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.)
Schwickardi Gerhard Dr Sc Tech
Original Assignee
Schwickardi Gerhard Dr Sc Tech
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 Schwickardi Gerhard Dr Sc Tech filed Critical Schwickardi Gerhard Dr Sc Tech
Publication of EP0005552A2 publication Critical patent/EP0005552A2/fr
Publication of EP0005552A3 publication Critical patent/EP0005552A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • B01F35/94—Heating or cooling systems using radiation, e.g. microwaves or electromagnetic radiation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs

Definitions

  • the invention relates to a heating and mixing system for building materials with a mixing room.
  • a drum dryer is known in which the material to be processed is directly exposed to an oil or gas flame.
  • the mix is subjected to a treatment which is often damaging, destructive or oxidizing.
  • direct flame treatment results in waste products that pollute the environment.
  • the object of the invention is to provide a heating and mixing system for building materials with a mixing room, which is economically advantageous and can avoid the disadvantages of direct flame treatment.
  • the mixing room is equipped with at least one electrode which is provided for the emission of high-frequency electromagnetic waves and is connected to a high-frequency generator.
  • the heating and mixing system designed according to the invention permits mixed conveyance or forced mixing of the building material with simultaneous irradiation with easily adjustable and meterable dielectric high-frequency or microwave energy for heating or drying the mixed material, so that the material is evenly Mixing is heated homogeneously and without contact with a high power concentration in the material. Depending on the diffusion resistance of the good for the vapor passage, the drying time for this good results.
  • the frequency of the electromagnetic waves can be selected from the following frequencies: 13.56 MHz, 27, 120 MHz, 2450 MHz. These frequencies are approved in most countries for high frequency heating purposes.
  • the mixing room can also be equipped with at least one aftertreatment electrode which is provided for the emission of high-frequency electromagnetic waves and is connected to a high-frequency generator. This measure enables additional heat treatment of the building material.
  • the electrode and / or the aftertreatment electrode can advantageously be adjustable horizontally and / or vertically and / or obliquely.
  • the mixing room can be equipped with at least one radiant heater. Electric radiant heaters or infrared radiators are preferred.
  • the electrode can advantageously be designed as a rotatable conveying part.
  • the rotatable conveyor part must of course be isolated and, for example, connected to a bushing leading to the high-frequency generator via a slip ring.
  • the mixing room can be equipped with at least one reflector directed towards the building materials and intended for the electromagnetic waves occurring therein.
  • the mixing conveyor system for loose building materials 11 works on the basis of the high-frequency treatment with the industrially known dielectric heating method.
  • a powerful rotary transformer 3 can be switched (switch 2), which in turn supplies a high-voltage rectifier 4 with electrical energy.
  • the high DC voltage serves as the supply voltage for the tube oscillator 6, which essentially contains the oscillator tube 5 and the tunable resonant circuit 8.
  • the fan 7 ensures the dissipation of the resulting heat loss in the oscillator.
  • the high-frequency and high-voltage electrical energy generated in the oscillator is fed to the mixing conveyor system 10 via a suitable waveguide and a tunable coupling coil 9.
  • a working capacitor with the plates 12 and 13, between which the mix is heated in the high-frequency high-voltage alternating field.
  • the coupling coil 9 and the working capacitor 12-13 form a parallel resonant circuit which can be tuned to the machining frequency.
  • Regulatory industry frequencies are used, which in most cases are approved for high frequency dielectric heating systems commonly used in the industry, e.g. the frequencies 13.560 MHz and 27.120 MHz or microwaves for example 2450 MHz.
  • the mixing conveyor system 10 shown in FIG. 1 needs As a microwave generator for electrical heating in the power range of approx. 1 - 1000 kW, which can also be larger or smaller in terms of output.
  • the building material to be treated or essentially its water skin is heated in this furnace-like generator.
  • an optimum for heating can be set either to the dielectric properties of the building material or the water.
  • the electrical high-frequency energy or microwave energy can be in the continuous system 10 be optimally set for the heating process. This regulation takes place in a very short time with the aid of the change in the electric field strength or the change in frequency.
  • the heating process takes place very evenly, i.e. homogeneously, in terms of location and time.
  • the operation can be set continuously, intermittently or in combination from both processes, so that the desired temperature can be set locally in the order of magnitude of approx. 25 ° C and 250 ° C and above, depending on the process.
  • the transmission losses and the temperature gradient within the treatment substance are negligibly small, as was the result of test results using a model system.
  • the relationship between the heat absorbed by the treatment material and the supplied high-frequency energy or microwave energy is such that the electrically usable heat increases proportionally to the square electric field strength, linear to the measurable material properties of the building material (dielectric constant, dielectric loss factor).
  • FIG. 2 shows an exemplary embodiment of a technologically constructable mixing conveyor system.
  • the horizontally operating conveyor shafts 14 and 15 are driven by the drive 16.
  • the stirring or conveying arms 17 and 13 with wear plates at both ends convey the material to be treated fed through the inlet 19 into the mixing trough 20.
  • the building material to be irradiated gets between the plates 21 and 22 of the microwave generator or the high-frequency generator, so that the dielectric drying process can be carried out.
  • the plates 21 and 22 can be adjusted horizontally, vertically and obliquely in order to be able to set an optimal setting angle during the high-frequency treatment or microwave treatment. Then, depending on the result, an additional heat treatment takes place between the aftertreatment plates 23 and 24, through which the material to be treated is also conveyed.
  • the high-frequency energy or microwave energy is supplied via the high-voltage bushings 25 and 26 for the main treatment plates and for the after-treatment plates.
  • the infrared or normal electric radiant heaters 27 and 28 dry the water vapors that have occurred during the heating process in the mixing tub.
  • the fan 29 ensures the necessary removal of the air humidity. Otherwise, there is natural air circulation in the mixing plant itself. After drying by heating, the mixed material arriving in the conveying direction 30 falls through the outlet 31, as desired, into a storage bunker or into waiting containers.
  • the shielding plates 32 and 33 shield the high-frequency fields of the active wave space from the outside, so that the system works absolutely harmless for the operating personnel.
  • a cylindrical mixing kettle 34 is shown, in which a building material is forced by stirring arms 35 and 36 onto a circular orbit 37 with the mixer shaft 38 quantity is treated with simultaneous heating with high-frequency or microwave fields.
  • the working capacitor plates 39 and 40 are adjusted in stages or continuously in the adjustment directions 43 and 44 via the drive mechanism 41 and 42, while the stirring blades with the longitudinal movements 45 and 46 ensure good mixing of the material to be treated.
  • the mixing paddles can be automatically or continuously adjusted in stages or continuously with the mixing arms from a maximum deflection position (section AA) to a minimum deflection position or vice versa (section BB).
  • the high-frequency high voltage is fed to the construction processing system via high-voltage bushing insulators 47 and 48.
  • the heating and mixing systems described can also be operated while mounted on means of transportation.
  • the building materials can have different grain sizes. They can be solid and wet or liquid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Microbiology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electromagnetism (AREA)
  • Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • Biotechnology (AREA)
  • Chemical & Material Sciences (AREA)
  • Molecular Biology (AREA)
  • Toxicology (AREA)
  • General Health & Medical Sciences (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Drying Of Solid Materials (AREA)
EP79101531A 1978-05-23 1979-05-21 Dispositif de chauffage et de mélange de matériaux de construction Withdrawn EP0005552A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH556878 1978-05-23
CH5568/78 1978-05-23

Publications (2)

Publication Number Publication Date
EP0005552A2 true EP0005552A2 (fr) 1979-11-28
EP0005552A3 EP0005552A3 (fr) 1979-12-12

Family

ID=4295745

Family Applications (1)

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EP79101531A Withdrawn EP0005552A3 (fr) 1978-05-23 1979-05-21 Dispositif de chauffage et de mélange de matériaux de construction

Country Status (1)

Country Link
EP (1) EP0005552A3 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0187173A1 (fr) * 1984-12-31 1986-07-16 Isem B.V. Procédé et appareil pour sécher et homogénéiser des matériaux contenant des liquides
FR2645950A1 (fr) * 1989-04-18 1990-10-19 Marzat Claude Dispositif mecanique electrique et electromagnetique combine permettant un sechage optimise de bouchons ou autre produit par association de ventilation et d'application de micro-ondes
EP0535771A1 (fr) * 1991-10-04 1993-04-07 Matsui Manufacturing Co., Ltd. Dispositif pour le séchage de produits pulvérulents ou granuleux
NL1000248C2 (nl) * 1995-04-28 1996-10-29 Hosokawa Micron B V Werkwijze en inrichting voor met een MHF-veld verwarmen en/of drogen van poeder-, korrelvormige en/of pasteuze materialen in een conisch mengvat met tenminste een roterende en wentelende mengschroef.
WO1997037184A1 (fr) * 1996-04-02 1997-10-09 Urban Stricker Dispositif pour le traitement thermique de matieres en vrac dans des convoyeurs a vis, et procede de sechage de matieres en vrac
NL1006690C2 (nl) * 1997-07-30 1999-02-02 Marinus Minkjan Microgolf productverwerkingsmachine.
WO2004113812A1 (fr) * 2003-06-20 2004-12-29 Amut S.P.A. Dispositif et methode pour chauffer, secher et/ou cristalliser des matieres plastiques

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE494883A (fr) *
DE707925C (de) * 1938-07-10 1941-07-08 Siemens Schuckertwerke Akt Ges Verfahren zum Zerkleinern, insbesondere Zerpulvern, von Kohle und anderem Gut
GB609192A (en) * 1945-03-27 1948-09-27 Standard Telephones Cables Ltd Improvements in or relating to high frequency heating
CH308256A (de) * 1952-10-08 1955-07-15 Felber Norbert Hochfrequenz-Elektrode für Hochfrequenz-Backofen.
CH346161A (de) * 1956-02-02 1960-04-30 Carl Bremer Rudolf Mittels Hochfrequenz arbeitende Trocknungsvorrichtung
GB889159A (en) * 1960-02-03 1962-02-07 Radyne Ltd Improvements in or relating to dielectric heating apparatus
DE1149474B (de) * 1958-07-05 1963-05-30 Huels Chemische Werke Ag Verfahren und Vorrichtung zum kontinuierlichen Trocknen von verduennungsmittelfeuchten Kunststoffen
DE1250367B (fr) * 1967-09-14
US3555693A (en) * 1968-09-27 1971-01-19 Bangor Punta Operations Inc Method and apparatus for treating pieces of material by microwaves
US3777095A (en) * 1972-05-15 1973-12-04 Tokyo Shibaura Electric Co Microwave heating apparatus

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE494883A (fr) *
DE1250367B (fr) * 1967-09-14
DE707925C (de) * 1938-07-10 1941-07-08 Siemens Schuckertwerke Akt Ges Verfahren zum Zerkleinern, insbesondere Zerpulvern, von Kohle und anderem Gut
GB609192A (en) * 1945-03-27 1948-09-27 Standard Telephones Cables Ltd Improvements in or relating to high frequency heating
CH308256A (de) * 1952-10-08 1955-07-15 Felber Norbert Hochfrequenz-Elektrode für Hochfrequenz-Backofen.
CH346161A (de) * 1956-02-02 1960-04-30 Carl Bremer Rudolf Mittels Hochfrequenz arbeitende Trocknungsvorrichtung
DE1149474B (de) * 1958-07-05 1963-05-30 Huels Chemische Werke Ag Verfahren und Vorrichtung zum kontinuierlichen Trocknen von verduennungsmittelfeuchten Kunststoffen
GB889159A (en) * 1960-02-03 1962-02-07 Radyne Ltd Improvements in or relating to dielectric heating apparatus
US3555693A (en) * 1968-09-27 1971-01-19 Bangor Punta Operations Inc Method and apparatus for treating pieces of material by microwaves
US3777095A (en) * 1972-05-15 1973-12-04 Tokyo Shibaura Electric Co Microwave heating apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0187173A1 (fr) * 1984-12-31 1986-07-16 Isem B.V. Procédé et appareil pour sécher et homogénéiser des matériaux contenant des liquides
FR2645950A1 (fr) * 1989-04-18 1990-10-19 Marzat Claude Dispositif mecanique electrique et electromagnetique combine permettant un sechage optimise de bouchons ou autre produit par association de ventilation et d'application de micro-ondes
EP0535771A1 (fr) * 1991-10-04 1993-04-07 Matsui Manufacturing Co., Ltd. Dispositif pour le séchage de produits pulvérulents ou granuleux
NL1000248C2 (nl) * 1995-04-28 1996-10-29 Hosokawa Micron B V Werkwijze en inrichting voor met een MHF-veld verwarmen en/of drogen van poeder-, korrelvormige en/of pasteuze materialen in een conisch mengvat met tenminste een roterende en wentelende mengschroef.
WO1996034240A1 (fr) * 1995-04-28 1996-10-31 Hosokawa Micron B.V. Procede et dispositif de rechauffement et/ou de sechage par un champ moyenne frequence de materiaux en poudre, en granules ou en pate dans un reservoir de melange conique
WO1997037184A1 (fr) * 1996-04-02 1997-10-09 Urban Stricker Dispositif pour le traitement thermique de matieres en vrac dans des convoyeurs a vis, et procede de sechage de matieres en vrac
NL1006690C2 (nl) * 1997-07-30 1999-02-02 Marinus Minkjan Microgolf productverwerkingsmachine.
WO2004113812A1 (fr) * 2003-06-20 2004-12-29 Amut S.P.A. Dispositif et methode pour chauffer, secher et/ou cristalliser des matieres plastiques
WO2005003664A1 (fr) * 2003-06-20 2005-01-13 Amut Spa Dispositif et procede permettant de chauffer et/ou de secher des materiaux en plastique

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Publication number Publication date
EP0005552A3 (fr) 1979-12-12

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