CN100395498C - Apparatus for processing grain using microwave energy - Google Patents
Apparatus for processing grain using microwave energy Download PDFInfo
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- CN100395498C CN100395498C CNB2006100008117A CN200610000811A CN100395498C CN 100395498 C CN100395498 C CN 100395498C CN B2006100008117 A CNB2006100008117 A CN B2006100008117A CN 200610000811 A CN200610000811 A CN 200610000811A CN 100395498 C CN100395498 C CN 100395498C
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- conveyer belt
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- 238000009413 insulation Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 abstract description 15
- 239000000463 material Substances 0.000 abstract description 14
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
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- 210000004681 ovum Anatomy 0.000 description 3
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- 239000011810 insulating material Substances 0.000 description 1
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- Constitution Of High-Frequency Heating (AREA)
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Abstract
The present invention relates to a device for processing grain by microwaves, which is composed of a material conveyor and a microwave processing tunnel arranged on the material conveyor, wherein the microwave processing tunnel is formed from a plurality of microwave processing units, and each microwave processing unit is formed from a processing cavity and a microwave generator arranged on the top of the processing cavity. The whole processing tunnel is orderly divided into a heating and temperature raising region, a heat preventing and dehumidifying region and a temperature lowering and dust removing region, and exhaust devices are arranged on the lateral sides of the microwave processing units in the last two regions. Grain to be processed is conveyed by a conveyor belt made of a wire mesh to pass the processing tunnel, and the conveyor belt keeps contact with a conveyor belt trailing plate in the processing tunnel to prevent the grain on the surface of the conveyor belt from partial overheating. The device has the advantages of low manufacture and maintenance cost. The device also has the advantages that microorganisms, pests and vermin in the grain can be simultaneously killed during continuous drying, and the phenomena of overheating, germinating rate decrease, etc. of the grain during processing can be effectively prevented. The present invention can be widely used for processing grain and seeds of crops.
Description
Technical field
The present invention relates to a kind of grain be processed the device of processing, relate in particular to a kind of microwave energy that utilizes grain is carried out the device that drying, sterilization and desinsection are handled
Background technology
China is maximum in the world grain-production and consumer nation, annual have little time because of having a humid climate drying cause go mouldy, grain loss quantity that germination etc. is caused is up to 5%～10%.As running into rainy weather, loss quantity is more surprising.Along with the raising of the mechanization degree of grain-production and processing, rural area, various places farming rich and influential family contract cultivate land increases year by year, and the harvesting of grain has realized mechanization basically, but grain drying device is then very few.The drying of present most grains still adopts the original mode of drying naturally, and not only the quality of grain is difficult to guarantee, and is subjected to weather effect very serious.
The hot air type drying plant is domestic modal mechanical drying equipment.But not only volume is big, power consumption is high for this equipment, environmental pollution is serious, and owing to adopt the hyperthermia and superheating air to dry, very serious to the quality influence of oven dry grain.The grain quality that most equipment is dried descends, and often only can use as feed grain.As for foodstuff seed, then, can not dry with this equipment owing to the too high germination percentage that influences of the temperature in the drying course at all.And, along with energy scarcity and country to the raising of environmental protection attention degree, this is that the drying plant of the energy more and more can't satisfy the demands with coal or fuel oil.
Microwave is meant that wave-length coverage is that 1mm～1m, frequency range are the electromagnetic wave of 300MHz～GHz.The domestic microwave frequency that is generally used for heating is 915MHz and 2450MHz.The generation of microwave energy comes from microwave generator.Microwave generator is formed by magnetron and by magnetron provides the power supply of necessary condition of work.Utilize microwave generator electric energy directly can be converted to microwave energy.Therefore, microwave energy is a kind of cleaning, the free of contamination energy.
Only there is polar molecule could absorb microwave energy.When the material that contains moisture is in the microwave field, microwave electromagnetic field has the effect of two aspects to the effect of material: the one, and microwave energy is converted into material heat energy and material is heated, another kind of then be that biologically active part (as protein or enzyme) in the material or mixture (as bacterium, mould etc.) interact, their physiologically active is inhibited or encourages.The former is called the heating effect to material, and the latter then is called Fei Re or biological effect.
Utilize the heating effect and the biological effect of microwave, can realize that oven dry, sterilization and the desinsection to grain and other agricultural byproducts handled.
China utility model patent ZL99223127.2 discloses a kind of continuous-type microwave grain drier, multistage microwave cavity is set on the grain conveyer belt forms the multilevel drying chamber, allows grain in turn by the drying of each hothouse with realization grain.Yet, the described device of this patent, a microwave generator only is set in each microwave cavity, as adopt the HIGH-POWERED MICROWAVES generator, then cost and maintenance cost costliness, and, be difficult to again guarantee that microwave energy has sufficiently high energy density in the chamber, so limited by practical as adopting lower powered microwave generator.And this patent is failed to how preventing that the grain problems of excessive heat is described.
Patent ZL02243306.6 has reported a kind of computer program controlled heating using microwave crop dryer, only adopts a microwave heating chamber to carry out drying, has the problem in the above-mentioned patent equally.
In addition, because metal object is to the reflex of microwave and the antenna effect of tiny metal, the microwave energy equipment of being reported in the various documents all forbids to exist other metal objects except that shell in process chamber.Therefore the tunnel type micro wave that occurs in the market can all adopt the megohmite insulant that does not absorb microwave as conveyor materials by process equipment, and the most frequently used is Teflon tape.But the heat conductivility of megohmite insulant is generally also very poor.Therefore, adopt the conveyer belt of insulating materials not only to cost an arm and a leg, when being used for the cereal processing, the part that is easy to contact with conveyer belt at processed grain forms overheating layer, and the quality that causes processing rear section grain seriously descends.For the processing of foodstuff seed, then be easy to cause the decline of germination percentage.
All in all, the oven dry, sterilization and the desinsection that microwave energy are used for grain are handled, and are feasible from principle.But degradation problem under equipment manufacturing cost of using in the prior art and maintenance cost height, the processing back grain quality is that this method of restriction is moved towards a practical important technology difficult problem.
Summary of the invention
At above-mentioned the deficiencies in the prior art, the present invention proposes a kind of device that utilizes microwave energy grain to be processed processing.This device manufacturing and maintenance cost are low, can grain carried out continuous drying, kill microorganism in the grain and insect, in the worm's ovum, also can effectively prevent degradation phenomenon under overheated, quick-fried waist of grain in the process and the percentage of seedgermination, the processing that can be widely used in grain and crop seeds is handled.
Technical scheme of the present invention is as follows:
A kind of microwave energy that utilizes is processed the device of processing to grain, contains device for transporting objects, is arranged on the microwave processing tunnel on device for transporting objects top, feed arrangement and drawing mechanism; Described microwave processing tunnel is made of a plurality of microwave machining cells, each microwave machining cell is made up of process chamber and the microwave generator that is installed in the process chamber top, it is characterized in that: described microwave processing tunnel is divided into heat temperature raising district I, insulation dehumidifying district II and cooling dedusting area III successively, the microwave energy density in described three districts reduces successively, and only the process chamber side in described insulation dehumidifying district and cooling dedusting area is respectively equipped with exhaust apparatus.
Technical characterictic of the present invention also is: the conveyer belt in the device that described processing is handled adopts woven wire to make.
The present invention compared with prior art, have the following advantages and the high-lighting effect: 1. the present invention is owing to be divided into three the different thermal treatment zone of microwave energy successively with processing tunnel, thereby grain carried out continuous drying, kill microorganism in the grain and insect, in the worm's ovum, can effectively prevent degradation phenomenon under overheated, quick-fried waist of grain in the process and the percentage of seedgermination, thereby guarantee the grain quality after processed.2. conveyer belt adopts woven wire, prevents that effectively bottom that processed grain contacts with conveyer belt is because of the bad superheating phenomenon that causes that dispels the heat.In addition, adopt woven wire, broken through and to have adopted the technology prejudice of nonmetallic materials in the prior art, reduced the overall cost of equipment, help this device applying in the grain processing treatment industry as conveyer belt as conveyer belt.
Description of drawings
Fig. 1 is that tunnel type micro wave can material process equipment schematic diagram in the prior art.
Fig. 2 is the structural principle schematic diagram that utilizes microwave energy grain to be carried out processing device provided by the invention.
Fig. 3 a is the layout structure of microwave generator in the process chamber.
Fig. 3 b is the A-A cutaway view of Fig. 3 a.
Fig. 4 is the schematic cross-section of conveyer belt when moving on the conveyer belt supporting plate
The specific embodiment
Further specify the present invention below in conjunction with accompanying drawing.
Fig. 1 utilizes microwave energy material to be processed continuously the tunnel type material process equipment schematic diagram of processing in the prior art.The pedestal of complete equipment is one to be with the device for transporting objects 1 of conveyer belt, and a plurality of microwave machining cells 2 are arranged in turn and are installed on the device for transporting objects 1, forms microwave processing tunnel 3.Each microwave machining cell 2 is made up of microwave generator 4 and process chamber 5, exhaust apparatus 6 also is installed to discharge the humid air that contains of process chamber 5 inside in the side of process chamber 5.
Fig. 2 is the structural principle schematic diagram that utilizes microwave energy grain to be carried out processing device provided by the present invention.Form by device for transporting objects 1 and the microwave processing tunnel 3 that is mounted thereon.Microwave processing tunnel is formed by a plurality of microwave machining cells cascade successively, and each microwave machining cell is made up of process chamber 5 and the microwave generator 4 that is installed on its top, generally in each microwave machining cell adopts plural microwave generator.Characteristics according to grain processing, the microwave energy grain processing equipment that reaches of the present invention begins to be divided into three zones such as heat temperature raising district I, insulation dehumidifying district II, cooling dedusting area III with whole processing tunnel from inlet, the number of microwave generator shown in the figure 4 and microwave processing microwave generator unit only is a schematic diagram, and concrete number needs to determine according to the requirement of concrete facilities and equipments.
At heat temperature raising district I, the effect of microwave machining cell is to arrive the temperature fast lifting of processed grain on the conveyer belt 7 temperature required, therefore the number of set microwave generator 4 is maximum on process chamber 5, microwave energy density in this zone in the process chamber is also the highest, and exhaust apparatus is not set to avoid causing owing to forced exhaust the decline of cereal temperature.
At insulation dehumidifying district II, the effect of microwave machining cell is to keep the temperature constant of grain on the conveyer belt 7, and moisture content in grain is effectively discharged.Therefore the number of set microwave generator 4 will lack than the heat temperature raising district on process chamber 5, microwave energy density in this zone in the process chamber is also low than heat temperature raising district, and in the process chamber side exhaust apparatus 6 is set, to discharge the humid air that contains of process chamber 5 inside.
At cooling dedusting area III, the effect of microwave machining cell is to make the temperature of grain on the conveyer belt 7 slowly to descend, and the microorganism in the grain, insect and worm's ovum is proceeded killing microwave handle.Therefore the number at microwave generator set on the process chamber 54 is minimum in whole microwave processing tunnel, and the microwave energy density in this zone in the process chamber is also minimum.And in the process chamber side exhaust apparatus 6 is set, on conveyer belt supporting plate 8, processes passage, contain humid air and dust in order to what discharge process chamber 5 inside.
The mode of the present invention by at process chamber 5 tops a plurality of microwave generators being installed realizes the adjustment to microwave energy density in the process chamber 5.Grain is being processed in the processing procedure, need guarantee at the microwave energy of process chamber 5 bottoms even, inhomogeneous to prevent to the heating of grain on the conveyer belt 7.Fig. 3 a and Fig. 3 b have provided a kind of layout structure that microwave generator is installed in process chamber 5.Produce the magnetron 9 and the microwave waveguide 10 common microwave generators of forming of microwave, the microwave of generation enters process chamber 5 by microwave energy-feeding mouth 11.As previously mentioned, each machining area the microwave generator number difference that specifically needs, the layout of microwaves corresponding energy regenerative mouth is also different.During concrete enforcement, the layout of the number of microwave generator and microwave energy-feeding mouth should satisfy the requirement of two aspects: the one, and the microwave energy density of process chamber 5 inside reaches necessary requirement, the 2nd, each microwave generator is input into into the microwave in the process chamber 5 by the microwave energy-feeding oral instructions and does not produce interference each other, and the process chamber bottom is along even perpendicular to the microwave energy density of grain direction of transfer.
For preventing that the grain on the conveyer belt 7 from producing hot-spot layer, the conveyer belt that the present invention adopts woven wire to make when the microwave processing tunnel.Figure 4 shows that the schematic cross-section when conveyer belt 7 moves on conveyer belt supporting plate 8.Conveyer belt supporting plate 8 adopts metal materials to make the bottom to be the plane, oblique shape on the both sides.Utilize the inclined-plane on both sides, can prevent the skew of conveyer belt 7 in running.Because the weight of grain self, keep mechanical between conveyer belt and conveyer belt supporting plate and contact, promptly conveyer belt 7 is " to tow " to advance on conveyer belt supporting plate 8.Because the conveyer belt 7 and the conveyer belt supporting plate 8 that are adopted are heat conductivility good metal material, therefore this mode can prevent effectively that bottom that processed grain contacts with conveyer belt is because of the bad superheating phenomenon that causes that dispels the heat.In addition, adopt woven wire, broken through and to have adopted the general knowledge of nonmetallic materials in the prior art, reduced the overall cost of equipment, help this device applying in the grain processing treatment industry as conveyer belt as conveyer belt.
Claims (1)
1. one kind is utilized microwave energy that grain is processed the device of processing, contains device for transporting objects (1), is arranged on the microwave processing tunnel (3) on device for transporting objects top, feed arrangement and drawing mechanism; Described microwave processing tunnel is made of a plurality of microwave machining cells (2), each microwave machining cell is made up of process chamber (5) and the microwave generator (4) that is installed in the process chamber top, it is characterized in that: described device for transporting objects contains conveyer belt (7) and conveyer belt supporting plate (8), and described conveyer belt adopts woven wire to make; Described microwave processing tunnel is divided into heat temperature raising district I, insulation dehumidifying district II and cooling dedusting area III successively, and the number of the microwave generator in described three districts reduces successively; Process chamber side in the described insulation dehumidifying district II is provided with exhaust apparatus (6); Process chamber side in the described cooling dedusting area III also is provided with exhaust apparatus (6), and processes passage on conveyer belt supporting plate (8), with discharge process chamber (5) inner contain humid air and dust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100008117A CN100395498C (en) | 2006-01-13 | 2006-01-13 | Apparatus for processing grain using microwave energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100008117A CN100395498C (en) | 2006-01-13 | 2006-01-13 | Apparatus for processing grain using microwave energy |
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| Publication Number | Publication Date |
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| CN1808030A CN1808030A (en) | 2006-07-26 |
| CN100395498C true CN100395498C (en) | 2008-06-18 |
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| CNB2006100008117A Expired - Fee Related CN100395498C (en) | 2006-01-13 | 2006-01-13 | Apparatus for processing grain using microwave energy |
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| JP5061662B2 (en) * | 2007-03-08 | 2012-10-31 | ダイキン工業株式会社 | Drying equipment |
| CN101836674B (en) * | 2010-05-04 | 2012-05-23 | 吉林大学 | Microwave-assisted heating combined belt type drier |
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| CN103075872B (en) * | 2013-02-27 | 2014-09-03 | 岳阳钟鼎热工电磁科技有限公司 | Microwave hot-air dehydrating and drying equipment for agricultural and sideline products |
| CN103416383B (en) * | 2013-07-15 | 2015-02-25 | 烟台宁远微波设备有限公司 | Insecticidal device and usage method thereof |
| CN105451388A (en) * | 2015-12-24 | 2016-03-30 | 南京三乐微波技术发展有限公司 | Tunnel microwave application cavity capable of utilizing metal conveyor belt |
| CN105890323A (en) * | 2016-06-03 | 2016-08-24 | 江苏昕宇药业有限公司 | Low-humidity microwave device |
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| CN109282484A (en) * | 2018-09-06 | 2019-01-29 | 浙江大学 | A kind of high temperature and pressure hydro-thermal detoxification continuous operation device and method of microwave heating |
| CN110849131A (en) * | 2019-11-20 | 2020-02-28 | 新疆大学 | Multi-frequency layer vibration grain dryer |
| CN111014178A (en) * | 2019-12-09 | 2020-04-17 | 安徽科杰粮保仓储设备有限公司 | Intelligent environment-friendly grain dust removal method and equipment |
| CN112979363A (en) * | 2021-03-03 | 2021-06-18 | 江西省三余环保节能科技股份有限公司 | A conveyer that is used for fermented high-efficient microwave of fertilizer to disinfect |
| CN113881475A (en) * | 2021-10-27 | 2022-01-04 | 山西农业大学 | Wheat straw biomass fuel conversion equipment and production method |
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2006
- 2006-01-13 CN CNB2006100008117A patent/CN100395498C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4640020A (en) * | 1985-11-27 | 1987-02-03 | Mcdonnell Douglas Corporation | Zoned microwave drying apparatus and process |
| US4746968A (en) * | 1987-03-30 | 1988-05-24 | Mcdonnell Douglas Corporation | Combined microwave and thermal drying apparatus |
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| CN1808030A (en) | 2006-07-26 |
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