CN106871577A - A kind of microwave material drying device and microwave material drying means - Google Patents
A kind of microwave material drying device and microwave material drying means Download PDFInfo
- Publication number
- CN106871577A CN106871577A CN201710035417.5A CN201710035417A CN106871577A CN 106871577 A CN106871577 A CN 106871577A CN 201710035417 A CN201710035417 A CN 201710035417A CN 106871577 A CN106871577 A CN 106871577A
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- China
- Prior art keywords
- microwave
- heating
- storehouse
- paddy rice
- tempering
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Classifications
-
- 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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- 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
- F26B17/02—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces
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- 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
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/04—Agitating, stirring, or scraping devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/06—Grains, e.g. cereals, wheat, rice, corn
Abstract
The present invention relates to a kind of microwave material drying device and microwave material drying means, low temperature drying is carried out to water-containing materials based on microwave technology, heater includes microwave generator, heating using microwave storehouse, tempering storehouse, conveying mechanism and ventilation equipment；Heating using microwave storehouse includes material container, charging aperture and discharging opening, and also including microwave antenna and blade group, the input port of microwave antenna is connected with microwave generator, and radiation port is facing to the paddy rice in container；Blade at least part surface is covered by the paddy rice in container, and the direction flowed to discharging opening paddy rice using charging aperture, used as reference direction, blade is by the absolute value of angle between the surface normal direction of paddy rice covering part and reference direction more than 0 degree.The present invention realizes that paddy rice low is dried using microwave energy, and homogeneous heating, percentage of damage is low, and capacity usage ratio is high, nonstaining property discharge, energy-conserving and environment-protective.
Description
Technical field
The invention belongs to Pulse width technical field, and in particular to a kind of microwave material drying device and microwave material
Drying means.
Background technology
It is storage after harvesting, the primary link of processing that paddy rice dries.With the continuous improvement of China's rice yield, due to dry
Caused loss of going mouldy is consequently increased not in time for dry treatment, causes substantial amounts of waste, is increased income as agricultural high yield anxious to be resolved
Problem.
Paddy rice belongs to heat sensitive material, in drying process must strict control material temperature (being usually no more than 40 DEG C), it is no
The increased problem of quality decline, percent cracked rice can then be brought.Using circulating more than current the most widely used paddy rice drying equipment
Drying process, its theory diagram is as shown in Figure 1.Fuel (conventional coal, biomass etc.) burns in hot-blast stove PR1, by heat exchange
Produced thermal energy exchange to heat transfer agent-air, is formed hot blast by device；Hot blast is obtained enough in the presence of air-heater PR2
Blast, then mix appropriate cold air to obtain required wind-warm syndrome by valve PR3.Mixed hot blast enters heating cabinet PR4
Interior hot air duct, through the paddy in heating cabinet under Action of Wind pressure, water to be dried is given by self-contained thermal energy exchange
Rice, while taking away the moisture on rice grain surface, is finally discharged as waste gas by air outlet.Paddy rice in heating cabinet is in a point grain machine
It is discharged in the presence of structure PR5 in conveying worm PR6, elevator PR7 is delivered to by conveying worm PR6.Elevator PR7 is by water
Rice is transported to tempering storehouse PR8, into tempering process.During tempering, the hydrone of interior energy is obtained by rice grain internal migration
To surface.With the discharge of paddy rice in heating cabinet 4, the paddy rice inside the PR8 of tempering storehouse can supplement inflow heating cabinet, so as to be formed
The drying process of " heating "-" tempering " alternate cycles.According to paddy rice initial aqueous rate it is different, it is necessary to the number of times of circulation also not to the utmost
It is identical.
Although the problems such as solving rate of drying, percentage of damage, weak point is also bright above-mentioned conventional dryer energy
Aobvious.
First, paddy rice is to draw heat energy from hot blast by way of heat transfer in heating process, and heat energy is in rice grain
In transmission be also by conduct in the way of carry out.Because air, paddy rice are the non-conductors of heat, on the one hand heat transfer process is made
There is larger thermograde in into paddy particle, be easily broken, another aspect conduction of velocity is slow, and heat transfer time is long, diabatic process
In heat loss increase, so as to increased energy consumption.Second, the EGT that Hot-blast Heating mode is discharged certainly will be higher than paddy temperature
Degree, still carries the heat energy of larger proportion, reduce further the energy utilization efficiency of whole machine.Finally, Combustion of Hot Air Furnace is produced
Flue gas contains more contaminative discharge, and a large amount of uses can bring serious environmental pollution.
Heating using microwave has speed fast, the big advantage of penetration depth, the fields such as food, metallurgy, chemical industry, environmental protection it is existing compared with
Many applications.But in the commercial Application of the big scale of construction, the size of applicator can reach several or even tens wavelength, microwave field
Distribution has very strong inhomogeneities, causes temperature of charge spatial distribution uneven, is not suitable for for the sensitive thing of heating-up temperature
Material.Microwave be used for paddy rice dry had a more open achievement in research, but be all confined to laboratory, using 2.4GHz family expenses
Used as laboratory facilities, its achievement cannot be generalized to actual industrial production to micro-wave oven, and a main cause can not exactly be solved well
The certainly homogeneity question of heating using microwave.Used as a kind of responsive to temperature type material, drying process has strict limit to maximum temperature to paddy rice
System, if controlling the maximum temperature in whole space not transfinite, the paddy rice in the low-temperature spaces of a large amount of distributions cannot obtain enough
Heat energy, the speed and efficiency of heating can all be limited, so as to lose the distinctive advantage of microwave.Up to the present, there is not yet can be used for
The microwave paddy rice drying device of actual industrial production.
The content of the invention
In order to solve the technical problem present in prior art in dry materials industrial applications, the present invention proposes a kind of
Microwave material drying device and microwave material drying means, by designing heating using microwave storehouse, and optimize whole drying device
Structure composition, it is possible to use microwave energy realizes that the industrialization paddy rice of efficient, energy-saving and environmental protection dries production, its concrete technical scheme
It is as follows：
The first aspect of the present invention, there is provided a kind of microwave material drying means, methods described is comprised the following steps：
Step 1, removal of impurities treatment is carried out to the material；
Step 2, by the removal of impurities process after material load device for transporting objects；
Step 3, the startup device for transporting objects, to cause that the material is continuous between heating using microwave storehouse and tempering storehouse
Circulate；
Step 4, microwave generator is opened, and start blade the material in heating using microwave storehouse is sufficiently stirred for, it is ensured that its
It is heated evenly；Start blower fan, treatment is aerated with to the heating using microwave storehouse and the tempering storehouse；
The material temperature of step 5, the in real time material water ratio of measurement heating using microwave storehouse grain-entering mouth and heating using microwave storehouse grain outlet
Degree；The temperature of heating using microwave storehouse grain outlet is controlled to be in default temperature range；If the material of heating using microwave storehouse grain-entering mouth
Moisture content is less than or equal to standard aqueous rate, then carry out step 6；
Step 6, closing microwave generator, open row's grain outlet of microwave material drying device, keep microwave material to dry
Device materials inside is moved, until row's grain is finished.
Preferably, removal of impurities process step is carried out to the material includes screening and magnetic separation mode.
Preferably, the temperature of control heating using microwave storehouse grain outlet is in default temperature range includes adjustment microwave hair
The power of raw device and/or the circulation rate of the device for transporting objects.
Preferably, the temperature of control heating using microwave storehouse grain outlet also includes in default temperature range：Inspection in real time
The paddy rice temperature of micrometer Wave heating storehouse grain-entering mouth, according to heating using microwave storehouse grain-entering mouth and the paddy rice temperature difference of grain outlet, Yi Jiwei
The paddy rice temperature adjustment microwave heating time of Wave heating storehouse grain outlet.
Preferably, it is described that the heating using microwave storehouse and the tempering storehouse are aerated in process step, to the microwave
The air output of heating cabinet is not less than 2.4m3/ hkg, the ventilation to the tempering storehouse is not less than 2.4m3/h·kg。
A kind of second method of the invention, there is provided microwave material drying device, described device includes microwave generator, microwave
Heating cabinet, tempering storehouse, conveying mechanism and ventilation equipment；The microwave generator is connected with the heating using microwave storehouse；It is described defeated
Mechanism is sent to be connected between the tempering storehouse and the heating using microwave storehouse；
The heating using microwave storehouse includes material container, charging aperture, discharging opening and microwave antenna, and the material is entered by charging aperture
Enter the heating using microwave storehouse, be filled into the material container, and under the promotion of the conveying mechanism from the charging aperture to
The discharging opening movement；The microwave antenna is used to heat the material.
Preferably, the ventilation equipment include blower fan and air channel, and the air channel is used to add fan outlet with the microwave
Hot storehouse and the tempering storehouse UNICOM.
Preferably, the input port of the microwave antenna is connected with the microwave generator, the radiation of the microwave antenna
Mouthful facing to the material container.
Preferably, the heating using microwave storehouse also includes microwave antenna and blade group, at least portion of the blade group Leaf
Divide surface by the material covering in the material container, and the direction flowed with the charging aperture to the discharging opening paddy rice is made
It is reference direction, the blade is had an angle between the surface normal direction of paddy rice covering part and the reference direction.
The third aspect of the present invention, there is provided a kind of dry materials method, methods described is comprised the following steps：
Step 1, startup device for transporting objects, to cause that the material is continuously circulated between heating using microwave storehouse and tempering storehouse
Flowing；
Step 2, unlatching microwave generator, to cause the material by heating using microwave；Start blower fan, add with to the microwave
Hot storehouse and the tempering storehouse are aerated treatment；
Step 3, the temperature of control heating using microwave storehouse grain outlet are in default temperature range；When material water ratio is low
When predetermined moisture content, then step 4 is carried out；
Step 4, closing microwave generator, open row's grain outlet of microwave material drying device.
The beneficial effect that the present invention can reach：
First, using microwave as industrialization dried material thermal source, on the premise of ensureing that temperature of charge do not transfinite, fully
The advantage that heating using microwave speed is fast, depth of interaction is big is given play to, realization can be used for the dry materials processing of industrialized production, dry
Process energy conservation environmental protection.
2nd, efficient air-supply passage is devised, hot blast is substituted using ventilating air, reduce the temperature between material and air
Degree gradient, improves dried materials quality, while reducing the discharge of hot blast, more energy-conservation.
3rd, the microwave energy exposure that microwave generator is produced is passed to by material to be dried using microwave antenna, and is utilized
One group of normal direction is not parallel to the blade in Flow of Goods and Materials direction, makes material that the friendship of locus is produced when flowing through blade surface
Change, solve the uneven heating problem of non-uniform brought of microwave field distribution in big scale of construction applicator.
Brief description of the drawings
Specific embodiment of the invention is described in further detail below in conjunction with the accompanying drawings；
Fig. 1 is traditional hot blast Paddy rice drier principle schematic；
The operation principle schematic diagram that Fig. 2 is provided for one embodiment of the invention；
The blades arrangement mode cross-sectional view that Fig. 3 (a) is provided for one embodiment of the invention；
The blades arrangement mode top view that Fig. 3 (b) is provided for one embodiment of the invention；
The microwave antenna schematic diagram that Fig. 4 is provided for one embodiment of the invention；
The microwave antenna broken section enlarged drawing that Fig. 5 is provided for one embodiment of the invention；
The tempering storehouse air channel cross-sectional view that Fig. 6 is provided for one embodiment of the invention；
The heating using microwave storehouse side view that Fig. 7 (a) is provided for one embodiment of the invention；
The heating using microwave storehouse cross-sectional view that Fig. 7 (b) is provided for one embodiment of the invention；
The heating using microwave storehouse side view that Fig. 8 (a) is provided for one embodiment of the invention；
The heating using microwave silo roof view that Fig. 8 (b) is provided for one embodiment of the invention.
The reference being related in Figure of description is explained as follows：
Wave producer -1, heating using microwave storehouse -2, tempering storehouse -3, conveying mechanism -4, ventilation equipment -5；Material container -21, enter
Material mouth -22, discharging opening -23, microwave antenna -24, blade -25, axle -26, drive -27；Rectangular waveguide -241, conoid type loudspeaker
- 242, gap -243, insulation medium board -244；Pipeline -31, pipeline -32；Divide grain wheel -41, swash plate -42, elevator -43；Take out
Wind blower fan -51, air channel -52.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, should all belong to the model of present invention protection
Enclose.
Material refers to material to be dried in the present invention, specifically, can be had including paddy rice, wheat etc. certain aqueous
Amount needs the cereal being dried；Melon seeds, peanut, American pistachios, pine nut etc. need to be dried the nut of preservation；Raisins, perfume (or spice)
Any of several broadleaf plants piece, dried mango etc. need the dry fruit being dried, it is necessary to the feed of kept dry transport, sea-tangle etc. need dry marine products
Product；Agricultural byproducts are not limited to, it is necessary to go the sandy soil of moisture removal, soil, wood chip etc. to fall within the material model in the present embodiment
Farmland；In a word, the present embodiment is not defined to the particular type of material, and it is to need withering production and life
Articles for use.
The embodiment of the present invention is described in detail with reference to Figure of description as follows：
The present embodiment provides a kind of microwave material drying device, as shown in Fig. 2 including microwave generator 1, heating using microwave storehouse
2, tempering storehouse 3, conveying mechanism 4 and ventilation equipment 5.Wherein microwave generator 1 is connected with heating using microwave storehouse, and microwave generator is produced
Microwave energy be delivered in heating using microwave storehouse；Tempering storehouse 3 is located at heating using microwave storehouse top；Conveying mechanism position 4 is in heating using microwave storehouse
And tempering storehouse between, Matter Transfer flowing is promoted；Ventilation equipment 5 pass through the collective effect in blower fan and air channel, in heating using microwave storehouse
Air stream is formed with the material to be dried in tempering storehouse, the moisture on material particles surface is taken away.
As shown in Fig. 2 a kind of heating using microwave storehouse 2 of microwave material drying device embodiment 1 of the invention, including positioned at storehouse
The container 21 for holding material of body bottom, positioned at the charging aperture 22 of warehouse side, positioned at the discharging opening 23 of charging aperture offside, is located at
Microwave antenna 24 above container 21, one group of blade 25, and the axle 26 and the drive 27 with the rotation of moving axis 26 of blade are installed.
Wherein, the input port of microwave antenna 24 is connected with the output end of microwave generator 1, and radiation port is facing in lower reservoir 21
Material；Blade 25 is covered by the material in container 21.
In one example, blade 25 is made up of multiple sheet metals, these sheet metals be fixed on the surface of axle 26, according to
Helix (chain-dotted line on the surface of Fig. 2 axis 26) mode is arranged；One end of axle 26 is provided with drive 27, external impetus machinery band
Dynamic drive 27 is rotated so as to band moving axis 26；The rotation direction of axle 26 ensure helix that blade 25 arranged from charging aperture 22 to
Move in the direction of discharging opening 23.
In one example, as shown in Fig. 3 (a), towards the cross section of drive 27, there are three in a circumference
Blade, angle is 120 ° between blade.As shown in Fig. 3 (b), between the normal direction 292 and the axis direction 291 of axle 26 of blade 25
With an angle, under Fig. 3 (b) Leaf arrangement modes, drive need to be rotated in direction as shown in arrow 28, then axle 26 is with movable vane
Piece 25 is moved, and the impetus of axially (291) can be produced to material, material is moved from charging aperture to discharging opening, while also can
Material of stirring makes its generation radially and tangentially move, and realizes material three place-exchanges of dimension in heating cabinet, overcomes microwave
The uneven problem of field distribution.Specifically, angle can use different angles, such as 30 °, 35 °, 40 °, 45 °, 50 ° etc., root
According to the different and different dryer settings of material, the angle can be 0 ° (not including 0 °) to selecting between 90 °.Arrived with charging aperture
The direction of discharging opening paddy rice flowing as reference direction, blade by the surface normal direction of paddy rice covering part and reference direction it
Between angle absolute value be more than 0 degree.
In one example, the area of blade 25, distribution institute according to helix pitch and heating using microwave storehouse size, appearance
The rotating speed of the thickness of material and axle 26 is related in device 21, and usually, when rotating speed is fixed, blade area is bigger, pitch is bigger,
Then material flowing velocity in heating cabinet is faster, and the heat time is shorter.When heating using microwave storehouse cross section is larger, it would however also be possible to employ
Multiple is installed vaned axle and is used parallel, it is ensured that blade effect is full and uniform.
Preferably, the microwave antenna 24 of the present embodiment uses Waveguide slot antenna, as shown in figure 4, including rectangular waveguide
241, a port 2411 of the rectangular waveguide is the input port of antenna, another short circuit of port 2412.Microwave antenna 24 is along square
The axis direction of shape waveguide 241 is divided into some regions, and the structure type in each region is similar, only size difference, to ensure
The radiation power value in each region is identical.Microwave antenna has divided five regions altogether in the present embodiment, be designated as respectively A1~
A5, below by taking A1 regions as an example, specific embodiment is illustrated with reference to Fig. 6.On the waveguide broadside in each region, one group of seam is provided with
Gap 243, the gap connects the inside and outside space of waveguide 241.The position in gap, shape and area can be according to required radiation
The size design of Simulation of power, not as technical characteristic of the invention.Gap uses rectangle elongate slot, gap in the present embodiment
Broadside perpendicular to waveguide 241 axis direction.Insulation medium board 244 is coated with the outer surface in the gap 243, for preventing
Only the dust and steam of waveguide external enter waveguide, reduce the power capacity of waveguide.As a technical characteristic of the invention,
Rectangular waveguide is opened and conoid type loudspeaker 242 is provided with apertured broadside, and low profile and the waveguide broadside of the conoid type loudspeaker are consolidated
Electrical contact is shaped as, great Kou faces are used as radiation port facing to material.Platform cone loudspeaker 242 are played to the microwave radiation field in gap 243
Certain convergence effect, in making microwave radiation field concentrate the material acted on below platform cone great Kou faces.The height of conoid type loudspeaker
To be designed according to the cross sectional dimensions in heating using microwave storehouse with great Kou faces size, it is ensured that field intensity below in material distributed areas is use up
May be uniform.The conoid type loudspeaker can be made using such as metal material.
In one example, the tempering storehouse 3 of the microwave material drying device, including first group of cross section is polygonal
Pipeline 31 and second group of cross section are polygonal pipeline 32.Geomery of the pipeline 31 with 32 is identical, be placed in parallel；Pipeline 31
Two ends with 32 are individually fixed in tempering bulkhead.One end of pipeline 31 as shown in Figure 2 is to outside space opening, another end seal
Close；Pipeline 32 is closing, is connected with air channel 52 in the blind end side of pipeline 31 in the open end side of pipeline 31, and then and exhausting
Blower fan 51 is connected.Gather aperture on the surface of pipeline 31 and 32；Pipeline 31 and 32 is interspersed by layer, if pipeline 31 occupies odd number
Layer, then pipeline 32 occupies even level, and vice versa.The cross-sectional distribution of pipeline 31 and 32 is as shown in Figure 6.When induced draft fans 51 work
When, negative pressure is formed in air channel 51 and pipeline 32, the air in material is extracted out, and then negative pressure is produced in material；It is outside empty
Gas enters material by the aperture of pipeline 31 and its surface, forms air stream, takes away material particles surface aqueous vapor.
In one example, as shown in Figure 2, there is provided a kind of microwave material drying device, it is described wherein comprising conveying mechanism
Conveying mechanism includes point grain wheel 41, the swash plate 42 below tempering storehouse, and elevator 43；Divide grain wheel by rotating in tempering storehouse
Material be allocated on swash plate 42, the inclination angle of swash plate 42 and horizontal plane can more than 45 °, material is flowed under the influence of gravity into microwave
The charging aperture 21 of heating cabinet, it would however also be possible to employ inclination angle less than 45 ° simultaneously flows into material by conveyer belt or scraping plate transmission mechanism
The charging aperture 21 in heating using microwave storehouse；The material of the outflow of heating using microwave bin discharge port external 23 enters elevator 43, by the elevator by thing
Material is delivered to tempering silo roof portion, completes circulation.
In one example, ventilation equipment 5 include induced draft fans 51, air channel 52, blowing blower fan 53 and air channel 54.Wherein take out
Wind blower fan 51 is connected by air channel 52 with tempering storehouse；The densely covered aperture in the surface of air channel 54 connects air channel inside and heating using microwave storehouse
Logical, blowing blower fan 53 produces malleation in air channel, and air enters heating using microwave storehouse and through material bed by aperture.
In one embodiment, as shown in Fig. 7 (a) and Fig. 7 (b), heating using microwave storehouse includes cylindrical container 71, the container
Two end faces 711 and 722 maintain static, center section can be around own axis.The axis horizontal of cylinder 71 or close to water
Placing flat.Charging aperture 72 is located on fixed end face 711；Discharging opening is located on fixed end face 712；Material is contained under container 71
Portion space.Microwave antenna 74 is probeed into the upper space of container 71, thing of the radiation port facing to lower vessel portion by fixed end face 711
Material.Microwave antenna 74 can also have fixed end face 712 to probe into, and the direction that it enters microwave container 71 is not as technology of the invention
Feature.One group of blade 75 is made up of multiple sheet metals, and peace of standing turns in the inner surface of container 71, and blade is according to table in container 71
A helix 76 on face is arranged, and the important technology of blade is characterised by, its surface normal direction presss from both sides with container axis direction
Angle θ is not zero, i.e. blade surface normal direction is not parallel to axis direction.When container 71 is rotated, blades arrangement institute foundation
The direction of advance of helix 76 is to point to discharging opening 73 by charging aperture 72.The embodiment above ensures, when container 71 is rotated, to enter
Entering the blade to inside material can produce axial propulsive force, promote material to be moved from charging aperture to discharging opening, simultaneously because leaf
Piece surface normal is not parallel with axial direction, can also produce motive force radially and tangentially, drives material to move radially and tangentially, together
When cylindrical container inwall frictional force can also drive material tangentially to move, finally realize material three dimensions in microwave field
Locus exchange.The concrete shape of the Leaf 75 of the present embodiment 2, size can according to the rotating speed of container, material capacity and
Drying process is designed, and is not belonging to technical characteristic of the invention.In addition, driving the ripe skill of power machinery system category that container is rotated
Art, is not detailed in the present embodiment.
In another embodiment, it is that microwave adds with embodiment difference before as shown in Fig. 8 (a) and Fig. 8 (b)
The concrete structure in hot storehouse.Heating using microwave storehouse in the present embodiment includes tunnel packaging container 81, and conveyer belt 82 is arranged at the bottom of container 81,
There is charging aperture 83 one end of container 81, and the other end has discharging opening 84.Material enters container by charging aperture 83, and on conveyer belt 82
Form certain thickness heap high；Conveyer belt is moved under the drive of outside dynamic power machine structure from charging aperture to discharging opening, so that
Material is taken to discharging opening by charging aperture.Microwave antenna 85 be located at container 81 upper space, its radiation port face down lower section pass
Send the material for taking.The present embodiment also includes one group of blade 86, and the blade is made up of multiple foils；Blade by connecting rod with
The bulkhead of container 81 is fixed；Blade-section is all embedded in the material on conveyer belt 82；As shown in Fig. 8 (a), Flow of Goods and Materials side
Discharging opening (right side), i.e. x directions are flowed to by charging aperture (left side), then important technology of the invention is characterised by, each
The surface normal direction of blade is in angle theta with Flow of Goods and Materials direction in vertical plane (XOZ planes), and θ is not 0；Such as Fig. 8
B shown in (), equally as important technology feature of the invention, in horizontal plane, (XOY puts down in the surface normal direction of each blade
Face) interior and Flow of Goods and Materials direction is in included angle, and φ is not 0.Under above-mentioned blade mounting condition, when conveyer belt drives material stream
When dynamic, material produces motion relative to blade surface, then can change the direction of motion by blade surface, produces the fortune of Y and Z-direction
It is dynamic, produce the exchange of locus.
In one example, in order to realize sufficient place-exchange effect in container, the present embodiment is preferably using such as
Blades arrangement scheme shown in Fig. 8 (b), will 86 points of blade be two groups, first group of normal direction of blade 861 is in XOY plane
Be φ with Flow of Goods and Materials angular separation, then second normal direction of blade 862 in XOY plane with Flow of Goods and Materials angular separation
For-φ；In every group of blade, it is fixed on by several blades on a connecting rod 863 and constitutes a row；The storehouse of connecting rod 863 and container 81
Wall is fixed；Preferably, if first group of blade 861 is arranged in odd column, second group of blade 862 is then arranged in even column, instead
It is as the same；Preferably, first group of blade 861 position in the Y direction, interleaved with second group of blade 862 position in the Y direction.
In one embodiment, there is provided a kind of microwave material drying means, methods described uses microwave material drying device,
Specifically comprise the following steps：
Step 1, removal of impurities treatment is carried out to the material, described material is loaded by dry materials by device for transporting objects
Device.
In the step 1, removal of impurities treatment is carried out to the material can use the mode of such as screening or magnetic separation.With
As a example by material is material, screening mode can remove the bulky grain thing in material, and magnetic separation can then remove the huge sum of money in material
Category impurity.Rated power according to heating using microwave storehouse is different with volume, and the inventory of addition is also different, in one example
Material charge weight in heating using microwave storehouse is in the range of 6~10kg/kW, the material charge weight in tempering storehouse is the 8 of heating using microwave storehouse
~10 times.
Step 2, the startup device for transporting objects, to cause that the material is continuous between heating using microwave storehouse and tempering storehouse
After circulating, microwave power is opened, while being sufficiently stirred for the material in heating using microwave storehouse, it is ensured that it is heated evenly.
In the step 2, the material in the device for transporting objects is in the heating using microwave storehouse and the tempering storehouse
Middle circulation, is heated in the heating using microwave storehouse, and then in the tempering storehouse, the material is gradually cooled down, and wherein
Moisture is pulled away with air flow, so circulation, and the purpose of the dry materials is made so as to reach.
The material temperature of step 3, the in real time material water ratio of measurement heating using microwave storehouse grain-entering mouth and heating using microwave storehouse grain outlet
Degree；The temperature of heating using microwave storehouse grain outlet described in real-time control is in default temperature range；If heating using microwave storehouse grain-entering mouth
Material water ratio be less than or equal to standard aqueous rate, then carry out after the step of；
If material heated temperature in heating using microwave storehouse is too high to cause " percent cracked rice " high, have a strong impact on material and do
Dry quality.The temperature in heating using microwave storehouse can be controlled by controlling the power of microwave, in addition to Power Control, can be with
Temperature control is realized by the time in the heating using microwave storehouse using control material.
So that the material of heating using microwave is as rice as an example, control temperature is proper temperature between 38-40 °, then
The temperature of the grain outlet in measurement heating using microwave storehouse is needed, if the temperature of charge of heating using microwave storehouse grain outlet is reduced more than 40 DEG C
Microwave heating time；If the temperature of charge of heating using microwave storehouse grain outlet is less than 38 DEG C, increase microwave heating time.Add in control
While hot temperature, the moisture content of rice is measured, if moisture content is less than or equal to default moisture content, the step after continuing
Suddenly.
In step 3, different air supply modes is used for tempering storehouse and the heating using microwave storehouse, according to thing to be dried
As a example by expecting for paddy rice, for heating using microwave storehouse, using air blower according to 2.4m3The wind flow of/hkg is in heating using microwave storehouse
Paddy rice is divulged information；For tempering storehouse, using air exhauster, according to 1.8m3The wind flow of/hkg is to the paddy rice exhausting in tempering storehouse.It is real
When measurement heating using microwave storehouse charging aperture paddy rice moisture content, when the moisture content is less than or equal to 15%, the step of after execution.
Step 4, closing microwave power, open row's grain outlet of microwave material drying device, keep microwave material to dry and fill
Materials inside motion is put, until row's grain is finished.
Table 1 below is using the measurement of technical parameter result of the present embodiment method：
The microwave drier measurement of technical parameter result of table 1
It can be seen that, based on the above method, the moisture content of rice has reached less than 15% requirement that dries, and percentage of damage increases
Numerical value is only 0.1%, and severe cracking breakout is only 1.8%, meets and is required for drying for paddy rice.
Table 2 is referred to, table 2 is grain drying device of the present invention and traditional hot-air drying device parameter comparison table.
The grain drying device of table 2 and hot-air drying device parameter comparison
As shown in table 2, grain drying device of the present invention improves the temperature of material using the penetrability heating of microwave, makes material
In moisture vaporization, the water vapour being evaporated by dehumidification system drain and reach drying cereal purpose.It is of the invention
Drying device by microwaves has drying rate fast, efficiency high, environmental protection and energy saving, the features such as homogeneous heating is consistent inside and outside cereal, is in response to
The novel device of low-carbon economy.
Compared with existing dry materials method, advantage of the invention is that substituting traditional hot blast, environmentally friendly nothing using microwave energy
Pollute, heating process is fast, penetration depth is big, and energy consumption is low, uniform, quick, efficient adding can be realized with reference to sufficiently stirring
Heat.Temperature of charge after heating is controlled by control material flowing velocity on the premise of keeping microwave power constant, realizes producing
Can maximize.
It should be appreciated that referenced herein " multiple " refers to two or more."and/or", description association
The incidence relation of object, expression there may be three kinds of relations, for example, A and/or B, can represent：Individualism A, while there is A
And B, individualism B these three situations.Character "/" typicallys represent forward-backward correlation pair as if a kind of relation of "or".
The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of microwave material drying means, it is characterised in that methods described is comprised the following steps：
Step 1, removal of impurities treatment is carried out to the material；
Step 2, by the removal of impurities process after material load device for transporting objects；
Step 3, the startup device for transporting objects, to cause that the material is continuously circulated between heating using microwave storehouse and tempering storehouse
Flowing；
Step 4, microwave generator is opened, and start blade the material in heating using microwave storehouse is sufficiently stirred for, it is ensured that it is heated
Uniformly；Start blower fan, treatment is aerated with to the heating using microwave storehouse and the tempering storehouse；
The temperature of charge of step 5, the in real time material water ratio of measurement heating using microwave storehouse grain-entering mouth and heating using microwave storehouse grain outlet；Control
The temperature for making heating using microwave storehouse grain outlet is in default temperature range；If the material water ratio of heating using microwave storehouse grain-entering mouth
Less than or equal to standard aqueous rate, then step 6 is carried out；
Step 6, closing microwave generator, open row's grain outlet of microwave material drying device, keep microwave material drying device
Materials inside is moved, until row's grain is finished.
2. method according to claim 1, it is characterised in that the material is carried out removal of impurities process step include screening and
Magnetic separation mode.
3. method according to claim 1, it is characterised in that the temperature of control heating using microwave storehouse grain outlet is in pre-
If temperature range include adjustment microwave generator power and/or the device for transporting objects circulation rate.
4. method according to claim 1, it is characterised in that the temperature of control heating using microwave storehouse grain outlet is in pre-
If temperature range also include：The paddy rice temperature of real-time detection heating using microwave storehouse grain-entering mouth, according to heating using microwave storehouse grain-entering mouth and
The paddy rice temperature difference of grain outlet, and the paddy rice temperature of heating using microwave storehouse grain outlet adjusts microwave heating time.
5. method according to claim 1, it is characterised in that described to be carried out to the heating using microwave storehouse and the tempering storehouse
In ventilation process step, the air output to the heating using microwave storehouse is not less than 2.4m3/ hkg, to the ventilation in the tempering storehouse
It is not less than 2.4m3/h·kg。
6. a kind of microwave material drying device, it is characterised in that described device includes microwave generator (1), heating using microwave storehouse
(2), tempering storehouse (3), conveying mechanism (4) and ventilation equipment (5)；The microwave generator (1) and the heating using microwave storehouse (2)
Connection；The conveying mechanism (4) is connected between the tempering storehouse (3) and the heating using microwave storehouse (2)；
The heating using microwave storehouse (2) includes material container (21), charging aperture (22), discharging opening (23) and microwave antenna (24), institute
State material and the heating using microwave storehouse (2) is entered by charging aperture (22), be filled into the material container (21), and in the conveying
It is mobile from the charging aperture (22) to the discharging opening (23) under the promotion of mechanism (4)；The microwave antenna (24) is for heating
The material.
7. device according to claim 6, it is characterised in that the ventilation equipment (5) include blower fan (51) and air channel
(52), the air channel is used for fan outlet and the heating using microwave storehouse (2) and the tempering storehouse (3) UNICOM.
8. device according to claim 6, it is characterised in that the input port and the microwave of the microwave antenna (24)
Generator (1) is connected, and the radiation port of the microwave antenna (24) is facing to the material container (21).
9. device according to claim 6, it is characterised in that the heating using microwave storehouse (2) also includes microwave antenna (24)
With blade group, at least part of surface of the blade group Leaf (25) by the material covering in the material container, and with
Used as reference direction, the blade is by paddy rice covering part in the direction that the charging aperture (22) is flowed to the discharging opening (23) paddy rice
There is an angle between the surface normal direction divided and the reference direction.
10. a kind of dry materials method, it is characterised in that methods described is comprised the following steps：
Step 1, startup device for transporting objects, to cause the material continuous recycle stream between heating using microwave storehouse and tempering storehouse
It is dynamic；
Step 2, unlatching microwave generator, to cause the material by heating using microwave；Start blower fan, with to the heating using microwave storehouse
Treatment is aerated with the tempering storehouse；
Step 3, the temperature of control heating using microwave storehouse grain outlet are in default temperature range；When material water ratio be less than or
During equal to predetermined moisture content, then step 4 is carried out；
Step 4, closing microwave generator, open row's grain outlet of microwave material drying device.
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| CN108732208A (en) * | 2018-05-22 | 2018-11-02 | 上海交通大学 | A kind of Crop moisture sensor and the method for measuring grain moisture |
| CN109387063A (en) * | 2017-08-08 | 2019-02-26 | 毛强平 | A kind of agricultural drier tool and its autocontrol method |
| CN110094944A (en) * | 2019-05-07 | 2019-08-06 | 中联重机股份有限公司 | A kind of batch microwave grain drier and drying means |
| CN110567258A (en) * | 2019-08-13 | 2019-12-13 | 南昌大学 | movable rice drying equipment based on microwave and hot air combined drying process |
| CN110694900A (en) * | 2018-05-23 | 2020-01-17 | 王朝红 | Impurity removal drying device and drying method for agricultural grains |
| CN115406212A (en) * | 2022-06-29 | 2022-11-29 | 中南林业科技大学 | Device and method for drying grains by combining microwave and heat pump |
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| CN115406212A (en) * | 2022-06-29 | 2022-11-29 | 中南林业科技大学 | Device and method for drying grains by combining microwave and heat pump |
| CN115451661A (en) * | 2022-08-03 | 2022-12-09 | 农业农村部南京农业机械化研究所 | Microwave convection coupling grain drying module, drying system and drying method |
| CN115451661B (en) * | 2022-08-03 | 2023-11-14 | 农业农村部南京农业机械化研究所 | Microwave convection coupling grain drying module, drying system and drying method |
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