CN108981366B - Hot air microwave coupling drying equipment - Google Patents

Hot air microwave coupling drying equipment Download PDF

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Publication number
CN108981366B
CN108981366B CN201810709545.8A CN201810709545A CN108981366B CN 108981366 B CN108981366 B CN 108981366B CN 201810709545 A CN201810709545 A CN 201810709545A CN 108981366 B CN108981366 B CN 108981366B
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China
Prior art keywords
drying
hot air
channel
microwave
pipe
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CN201810709545.8A
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Chinese (zh)
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CN108981366A (en
Inventor
张�浩
刘景圣
赵城彬
许秀颖
吴玉柱
黄洪亮
曹勇
张大力
郑明珠
蔡丹
修琳
刘回民
李雨朋
董怡麟
刘惠麟
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Jilin Agricultural University
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Jilin Agricultural University
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Publication of CN108981366A publication Critical patent/CN108981366A/en
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    • 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
    • F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Electromagnetism (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Biotechnology (AREA)
  • Sustainable Development (AREA)
  • Molecular Biology (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The utility model provides a hot-blast microwave coupling drying equipment belongs to microwave drying technical field, and aim at solves the problem that microwave drying is inhomogeneous and hot-blast drying easily blows off the material that prior art exists. The invention comprises the following steps: the drying channel comprises a continuous circular arc-shaped drying channel which is horizontally arranged; the hot air generating device is arranged at the feeding end of the drying channel; a plurality of microwave generating devices are uniformly arranged on the early drying channel; the separation cabin is connected with one discharge end of the drying channel; and a storage tank arranged at the lower end of the separation cabin. By arranging the special continuous arc-shaped spiral channel, the materials are prevented from being damaged by overheating during the movement process and can be fully mixed with hot air and microwaves, so that the aim of quick drying is fulfilled; in addition, the continuous circular arc drying channel enables the reflection angle of the microwave on the inner wall of the channel to be larger, the reflection times to be more, the transmission distance to be longer, the inner wall without edges and corners is not easy to block the transmission of the microwave, and the energy of the microwave can be fully utilized.

Description

Hot air microwave coupling drying equipment
Technical Field
The invention belongs to the technical field of microwave drying, and particularly relates to hot air microwave coupling drying equipment.
Background
The hot air microwave coupling drying is a novel drying method and technology that microwave and hot air simultaneously act on a dried material, but microwave heating nonuniformity is a main factor restricting the development of the method. And the research of microwave hot air coupling drying mainly stays at the experimental research level at present, most of the used equipment is formed by transforming a microwave oven, and the lack of industrial equipment with excellent performance is also a main obstacle for restricting the application of the technology. Due to the uncertainty of the form of the powdery material, the powdery material is easy to be lifted and blown away under the condition of wind blowing, and in the prior art, no excellent method and equipment for coupling and drying the powdery material can be found.
Disclosure of Invention
The invention aims to provide hot air microwave coupling drying equipment, which solves the problems of uneven microwave drying and easy material blowing during hot air drying in the prior art, and realizes material drying by adopting a microwave and hot air coupling mode.
In order to achieve the above object, the present invention provides a hot air microwave coupling drying apparatus, comprising:
the drying channel is a continuous arc-shaped drying channel which is horizontally arranged;
the hot air generating device is arranged at the feeding end of the drying channel;
a plurality of microwave generating devices are uniformly arranged on the drying channel;
the separation cabin is connected with one discharge end of the drying channel;
and a storage tank arranged at the lower end of the separation cabin.
The drying passage includes:
a horizontally disposed spiral channel;
the feeding pipe is connected with one end of the spiral channel at one end, the other end of the feeding pipe is a free end, and a feeding hole is formed in the feeding pipe;
one end of the spiral channel and the other end of the spiral channel are respectively provided with a discharge pipe, and the other end of the discharge pipe is a free end.
The spiral channel is a steel pipe or a plastic pipe with metal coatings coated on the inner surface and the outer surface.
The discharge pipe is formed into a tapered structure from one end of the connecting spiral channel to the free end.
The inner wall of the discharge pipe is provided with a wave-absorbing coating.
The wave-absorbing coating is an iron oxide coating.
The hot air generating device comprises:
the fan is connected to the free end of the feeding pipe;
and the heater is arranged on the feeding pipe and is positioned between the fan and the feeding hole.
Each of the microwave generating devices includes:
a magnetron disposed on an outer surface of the spiral passage;
a power supply connected to the magnetron;
and a waveguide connected between the magnetron and the spiral channel.
The pod comprises:
the middle of the cabin body is of a cylindrical structure, the upper end and the lower end of the cabin body are of conical structures, one end with a large caliber of the conical structure is connected with the cylindrical structure, and an outlet at the lower end of the cabin body is positioned above the storage tank;
the water collecting tank is arranged in the cabin body and is positioned at the joint of the conical structure and the cylindrical structure at the upper end;
and the water outlet is arranged on the side wall of the cabin body and is communicated with the water collecting tank and the outside of the cabin body.
The drying equipment further comprises a base and a heat circulation pipeline; one end of a thermal circulation pipeline is connected with the upper end of the separation cabin, the other end of the thermal circulation pipeline is connected with a feeding pipe of the drying channel, and the joint of the thermal circulation pipeline and the feeding pipe is positioned between the fan and the heater; the drying channel, the hot air generating device, the microwave generating device, the separating cabin and the storage tank are all arranged on the base.
The working principle of the invention is as follows: according to the hot air and microwave coupling drying equipment, materials enter the drying channel from the feeding hole, the fan feeds outside cold air, the cold air flows through the heater and then becomes hot air, the hot air and the materials are mixed and conveyed forwards, the plurality of magnetrons in the plurality of microwave generating devices in the drying channel generate microwaves under the excitation of the power supply, the microwaves enter the drying channel through the waveguide tube, the hot air and microwave coupling drying is realized, and the drying of the materials can be quickly finished.
The invention has the beneficial effects that:
1. by arranging the special continuous arc-shaped spiral channel, the materials are prevented from being damaged by overheating during the movement process and can be fully mixed with hot air and microwaves, so that the aim of quick drying is fulfilled; in addition, the continuous circular arc drying channel ensures that the reflection angle of the microwave on the inner wall of the channel is larger, the reflection times are more, the transmission distance is longer, the inner wall without edges is difficult to block the transmission of the microwave, and the energy of the microwave can be fully utilized;
2. the heat circulation pipeline can transmit the excess heat air entering the separation cabin into the drying channel again, so that the secondary utilization of heat energy is realized, and energy is saved;
3. the discharge pipe is designed in a tapered mode, and the wave-absorbing coating is arranged on the inner wall of the discharge pipe, so that residual microwaves can be effectively absorbed, and excessive leakage to the external environment is avoided;
4. the water collecting tank and the water discharging port are arranged at the top of the separation cabin, so that water vapor in the hot air can be condensed and discharged, and the condensed water vapor is prevented from falling onto the dried material;
5. the drying channel is a steel pipe or a plastic pipe coated with metal coatings on the inner and outer sides, and the metal materials can effectively shield microwaves.
Drawings
FIG. 1 is a front view of a hot air microwave coupling drying apparatus according to the present invention;
FIG. 2 is a top view of a hot air microwave coupling drying apparatus according to the present invention;
FIG. 3 is a schematic diagram of the microwave coupling of the hot air microwave drying device of the present invention;
wherein: 1. the microwave drying device comprises a base, 2, a drying channel, 201, a spiral channel, 202, a feeding pipe, 203, a discharging pipe, 204, a feeding hole, 3, a hot air generating device, 301, a fan, 302, a heater, 4, a microwave generating device, 401, a magnetron, 402, a waveguide pipe, 5, a separating chamber, 501, a chamber body, 502, a water collecting tank, 503, a water discharging hole, 6, a material storage tank, 7 and a heat circulating pipeline.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
Referring to fig. 1 to 2, a hot air microwave coupling drying apparatus according to the present invention includes:
the drying channel 2 is a continuous circular arc-shaped drying channel 2 which is horizontally arranged;
the hot air generating device 3 is arranged at the feeding end of the drying channel 2;
a plurality of microwave generating devices 4 are uniformly arranged on the drying channel 2;
a separation chamber 5 connected with one end of the discharge end of the drying channel 2;
a storage tank 6 arranged at the lower end of the separation cabin 5;
the drying channel 2, the hot air generating device 3, the microwave generating device 4, the separating cabin 5 and the storage tank 6 are all arranged on the base 1;
and a thermal circulation pipeline 7, one end of the thermal circulation pipeline 7 is connected with the upper end of the separation cabin 5, the other end of the thermal circulation pipeline is connected with the feeding pipe 202 of the drying channel 2, and the joint of the thermal circulation pipeline 7 and the feeding pipe 202 is positioned between a fan 301 of the hot air generating device 3 and a heater 302 of the hot air generating device 3, so that the secondary utilization of thermal energy is realized.
The drying tunnel 2 includes:
a horizontally disposed spiral channel 201;
a feeding pipe 202 with one end connected with one end of the spiral channel 201, wherein the other end of the feeding pipe 202 is a free end, and a feeding port 204 is arranged on the feeding pipe 202;
a discharge pipe 203 with one end and the other end of the spiral channel 201, wherein the other end of the discharge pipe 203 is a free end.
The spiral channel 201 is a steel pipe or a plastic pipe with metal coatings on the inner surface and the outer surface, and the metal material can shield microwaves.
The discharge pipe 203 is formed with a tapered structure from one end of the connecting spiral channel 201 to the free end.
The inner wall of the discharge pipe 203 is provided with a wave-absorbing coating.
The wave-absorbing coating is an iron oxide coating.
The hot air generating device 3 includes:
a fan 301 connected to the free end of the feed pipe 202;
and a heater 302 disposed on the feeding pipe 202, wherein the heater 302 is located between the blower 301 and the feeding port 204.
Each of the microwave generating devices 4 includes:
a magnetron 401 disposed on an outer surface of the spiral passage 201;
a power supply connected to the magnetron 401;
and a waveguide 402 connected between the magnetron 401 and the spiral passage 201.
The pod 5 comprises:
the cabin body 501 of integral type, be cylindric structure in the middle of the cabin body 501, upper end and lower extreme are the taper structure, taper structure heavy-calibre one end with cylindric structure connects, the export of the lower extreme of the cabin body 501 is located 6 tops of stock chest, the free end of the discharging pipe 203 of dry passage 2 is followed the cylindric structure intermediate position of the cabin body 501 stretches into inside the cabin body 501.
The water collecting tank 502 is arranged in the cabin body 501, the water collecting tank 502 is positioned at the joint of the conical structure and the cylindrical structure at the upper end, the inner ring of the water collecting tank 502 is tilted upwards, and condensed water vapor is prevented from falling into the separation cabin 5;
and a water discharge opening 503 arranged on the side wall of the cabin 501, wherein the water discharge opening 503 is communicated with the water collecting tank 502 and the outside of the cabin 501. The water vapor in the hot air entering the separation chamber 5 can be condensed and discharged.
Referring to fig. 3, according to the refraction principle of the microwave generated by the microwave generator in the drying channel 2, the pipe is arranged into the continuous circular arc-shaped spiral channel 201, so that the reflection angle a of the microwave on the inner wall of the spiral channel 201 is larger, the reflection times are more, the transmission distance is longer, and the inner wall without edges and corners is not easy to block the transmission of the microwave, so that the energy of the microwave can be fully utilized.

Claims (9)

1. A hot air microwave coupling drying device is characterized by comprising:
the drying channel (2), the drying channel (2) is a continuous circular arc-shaped drying channel (2) which is horizontally arranged;
the hot air generating device (3) is arranged at the feeding end of the drying channel (2);
a plurality of microwave generating devices (4) uniformly arranged on the drying channel (2);
a separation cabin (5) connected with one end of the discharge end of the drying channel (2);
and a storage tank (6) arranged at the lower end of the separation cabin (5);
the drying tunnel (2) comprises:
a horizontally disposed spiral channel (201);
a feeding pipe (202) with one end connected with one end of the spiral channel (201), wherein the other end of the feeding pipe (202) is a free end, and a feeding port (204) is arranged on the feeding pipe (202);
one end of the discharging pipe (203) is connected with the other end of the spiral channel (201), and the other end of the discharging pipe (203) is a free end.
2. A hot air microwave coupling drying apparatus according to claim 1, wherein the spiral channel (201) is a steel pipe or a plastic pipe with metal coating on the inner and outer surfaces.
3. A hot air microwave coupling drying device according to claim 1, characterized in that the discharging pipe (203) is formed with a tapered structure from one end of the connecting spiral channel (201) to the free end.
4. A hot air microwave coupling drying device according to claim 1, characterized in that the inner wall of the discharge pipe (203) is provided with a wave absorbing coating.
5. The hot air microwave coupling drying equipment according to claim 4, wherein the wave-absorbing coating is an iron oxide coating.
6. A hot air microwave coupling drying apparatus according to claim 1, characterized in that the hot air generating device (3) comprises:
a fan (301) connected to a free end of the feed pipe (202);
and a heater (302) disposed on the feed tube (202), the heater (302) being located between the blower (301) and the feed inlet (204).
7. A hot wind microwave coupled drying apparatus according to any of claims 1 to 6, characterized in that each microwave generating device (4) comprises:
a magnetron (401) disposed on an outer surface of the spiral passage (201);
a power supply connected to the magnetron (401);
and a waveguide (402) connected between the magnetron (401) and the inside of the spiral passage (201).
8. A hot air microwave coupled drying apparatus according to any of claims 1-6, characterized in that the separation chamber (5) comprises:
the integrated cabin body (501) is of a cylindrical structure in the middle of the cabin body (501), the upper end and the lower end of the cabin body are of conical structures, one end with a large caliber of each conical structure is connected with the corresponding cylindrical structure, and an outlet at the lower end of the cabin body (501) is located above the storage tank (6);
the water collecting tank (502) is arranged in the cabin body (501), and the water collecting tank (502) is positioned at the joint of the conical structure and the cylindrical structure at the upper end;
and the water discharge port (503) is arranged on the side wall of the cabin body (501), and the water discharge port (503) is communicated with the water collection tank (502) and the outside of the cabin body (501).
9. A hot air microwave coupling drying device according to claim 6, characterized in that the drying device further comprises a base (1) and a heat circulation duct (7); one end of a heat circulation pipeline (7) is connected with the upper end of the separation cabin (5), the other end of the heat circulation pipeline is connected with a feeding pipe (202) of the drying channel (2), and the joint of the heat circulation pipeline (7) and the feeding pipe (202) is positioned between the fan (301) and the heater (302); the drying channel (2), the hot air generating device (3), the microwave generating device (4), the separating cabin (5) and the storage tank (6) are all arranged on the base (1).
CN201810709545.8A 2018-07-02 2018-07-02 Hot air microwave coupling drying equipment Active CN108981366B (en)

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Application Number Priority Date Filing Date Title
CN201810709545.8A CN108981366B (en) 2018-07-02 2018-07-02 Hot air microwave coupling drying equipment

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Application Number Priority Date Filing Date Title
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CN108981366B true CN108981366B (en) 2020-08-18

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101652232A (en) * 2007-03-30 2010-02-17 康宁股份有限公司 Method and applicator for selective electromagnetic drying of ceramic-forming mixture
CN203132296U (en) * 2013-02-27 2013-08-14 岳阳钟鼎热工电磁科技有限公司 Microwave hot air dehydrating drying device for agricultural and sideline products
CN104470022A (en) * 2014-11-13 2015-03-25 王俊 Powder microwave heating device and use method thereof
CN107490275A (en) * 2016-06-13 2017-12-19 辛北尔康普机器及成套设备有限责任公司 Method and continuous-type furnace for laser heating material roll
CN107588651A (en) * 2016-07-10 2018-01-16 金亚东 A kind of electromagnetic induction heating high temperature air dryer
CN206905489U (en) * 2017-04-21 2018-01-19 腾冲县大石头农业开发有限公司 A kind of horseradish automatic drier
CN207400316U (en) * 2017-07-08 2018-05-25 浙江峰邦机械科技有限公司 A kind of circulating hot air type walnut drying equipment

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203432251U (en) * 2013-07-26 2014-02-12 上海诺成药业股份有限公司 Continuous microwave dryer
MX2017001120A (en) * 2014-08-14 2017-05-10 Lbp Mfg Llc Waveguide exposure chamber for a micrwave energy applicator.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101652232A (en) * 2007-03-30 2010-02-17 康宁股份有限公司 Method and applicator for selective electromagnetic drying of ceramic-forming mixture
CN203132296U (en) * 2013-02-27 2013-08-14 岳阳钟鼎热工电磁科技有限公司 Microwave hot air dehydrating drying device for agricultural and sideline products
CN104470022A (en) * 2014-11-13 2015-03-25 王俊 Powder microwave heating device and use method thereof
CN107490275A (en) * 2016-06-13 2017-12-19 辛北尔康普机器及成套设备有限责任公司 Method and continuous-type furnace for laser heating material roll
CN107588651A (en) * 2016-07-10 2018-01-16 金亚东 A kind of electromagnetic induction heating high temperature air dryer
CN206905489U (en) * 2017-04-21 2018-01-19 腾冲县大石头农业开发有限公司 A kind of horseradish automatic drier
CN207400316U (en) * 2017-07-08 2018-05-25 浙江峰邦机械科技有限公司 A kind of circulating hot air type walnut drying equipment

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