CN115451661B - Microwave convection coupling grain drying module, drying system and drying method - Google Patents
Microwave convection coupling grain drying module, drying system and drying method Download PDFInfo
- Publication number
- CN115451661B CN115451661B CN202210925319.XA CN202210925319A CN115451661B CN 115451661 B CN115451661 B CN 115451661B CN 202210925319 A CN202210925319 A CN 202210925319A CN 115451661 B CN115451661 B CN 115451661B
- Authority
- CN
- China
- Prior art keywords
- drying
- module
- grain
- microwave
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001035 drying Methods 0.000 title claims abstract description 189
- 230000008878 coupling Effects 0.000 title claims abstract description 15
- 238000010168 coupling process Methods 0.000 title claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 21
- 238000007599 discharging Methods 0.000 claims description 18
- 238000005496 tempering Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000004080 punching Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000003491 array Methods 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 4
- 235000013339 cereals Nutrition 0.000 description 169
- 239000003570 air Substances 0.000 description 136
- 239000000463 material Substances 0.000 description 11
- 238000009434 installation Methods 0.000 description 10
- 238000007602 hot air drying Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 238000013508 migration Methods 0.000 description 5
- 230000005012 migration Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
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
-
- 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
- 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
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
-
- 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
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/08—Parts thereof
- F26B25/12—Walls or sides; Doors
-
- 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
- F26B25/06—Chambers, containers, or receptacles
- F26B25/14—Chambers, containers, receptacles of simple construction
- F26B25/18—Chambers, containers, receptacles of simple construction mainly open, e.g. dish, tray, pan, rack
-
- 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
- F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
- F26B25/225—Controlling the drying process in dependence on liquid content of solid materials or objects by repeated or continuous weighing of the material or a sample thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
- F26B9/063—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers for drying granular material in bulk, e.g. grain bins or silos with false floor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/85—Food storage or conservation, e.g. cooling or drying
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- Molecular Biology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a microwave convection coupling grain drying module, a drying system and a drying method, wherein the drying module comprises an upper air outlet section, a lower air outlet section, two microwave drying sections and a middle 1 air inlet section, the air outlet section comprises a plurality of air outlet pipes which are arranged in parallel, two ends of each air outlet pipe are open and are communicated with the outside atmosphere, and a plurality of through holes are formed in the outer wall of each air outlet pipe; the microwave drying section comprises a plurality of groups of microwave generating components, each group of microwave generating components is internally provided with a plurality of magnetrons which are arranged at equal intervals, one end of each group of microwave generating components is opened and communicated with an air outlet of a magnetron cooling fan, and a grain channel is formed in a space between two adjacent groups of microwave generating components; the air inlet section comprises a plurality of air inlet pipes which are arranged in parallel, one end of each air inlet pipe is opened and communicated with an air outlet of the air feeder through an air expansion pipe, and a plurality of through holes are formed in the side wall of each air inlet pipe; the air outlet pipe and the air inlet pipe are perpendicular to the grain channel. The invention jointly acts the microwave and the air convection on the grain seeds, thereby realizing the maintenance of grain quality and the rapid drying.
Description
Technical Field
The invention relates to grain drying equipment, in particular to a microwave convection coupling grain drying module, a drying system and a drying method.
Background
The current grain drying mainly comprises hot air drying of a fixed bed, hot air cross flow drying, hot air mixed flow drying, hot air concurrent flow and countercurrent drying and the like. The existing research shows that: the moisture gradient of the surface layer and the interior of the grain seeds in hot air drying is a main factor for driving the moisture in the grains to migrate outwards, and the moisture diffusion phenomenon caused by the concentration difference is a basic principle of hot air drying. However, the water gradient on the surface and in the grain can also cause the formation of stress differences in the grain, while too large stress differences can cause cracking of the grain seeds beyond the yield limit of the stress differences, thereby affecting the subsequent processing quality. In the grain harvesting season, a large number of farmers adopt higher hot air temperature to dry grains in order to accelerate the drying speed, so that not only is the bursting rate of the grains (rice) increased sharply, but also the gelatinization of starch in part of the grains affects the subsequent eating quality. Therefore, both grain quality maintenance and rapid drying have become issues to be resolved in the technical field of grain drying.
The existing grain circulation drying technology mainly adopts a multi-channel cross flow ventilation drying or mixed flow ventilation drying method to heat and dehumidify grains, does not contain a microwave heating component, is mainly driven by the moisture gradient (namely concentration difference) in the grain seeds in the drying process, and can only accelerate the evaporation of the moisture on the surface layers of the grain seeds by increasing the drying temperature if the drying speed is required to be increased, so that the moisture gradient in the grain seeds is increased, the faster outward migration rate of the moisture is obtained, and the stress difference caused by the moisture gradient in the grain seeds is also a dominant factor of cracking and bursting of the grain seeds, so that the grain quality is difficult to be simultaneously compatible with the rapid drying for the traditional technology.
Disclosure of Invention
The invention aims to: the invention aims to provide a microwave convection coupling grain drying module.
It is another object of the present invention to provide a microwave convection coupled grain drying system.
It is yet another object of the present invention to provide a method of microwave convection coupled grain drying.
The technical scheme is as follows: the invention relates to a microwave convection coupling grain drying module, which sequentially comprises an upper air outlet section, an upper microwave drying section, an air inlet section, a lower microwave drying section and a lower air outlet section from top to bottom, wherein the upper air outlet section and the lower air outlet section have the same structure and comprise a plurality of air outlet pipes and an air outlet section outer frame, the air outlet pipes are arranged in the air outlet section outer frame in parallel, the two ends of the air outlet pipes are opened and respectively communicated and fixed with an air outlet on the air outlet section outer frame, and a plurality of through holes are formed in the outer wall of the air outlet pipes;
the upper microwave drying section and the lower microwave drying section have the same structure and comprise a plurality of groups of microwave generating components, a microwave drying section outer frame and a plurality of magnetron cooling fans, wherein the plurality of groups of microwave generating components are fixedly arranged in the microwave drying section outer frame in parallel, two ends of the microwave generating components are opened, one end of the microwave generating component is communicated with an air outlet of the magnetron cooling fans through a through hole on the microwave drying section outer frame, the other end of the microwave generating component is communicated with the outside atmosphere through a through hole on the microwave drying section outer frame, and a grain channel is formed in a space between two adjacent groups of microwave generating components;
the air inlet section comprises a plurality of air inlet pipes, a plurality of air expanding pipes, a plurality of blowers and an air inlet section outer frame, the plurality of air inlet pipes are arranged in the air inlet section outer frame in parallel, one end of each air inlet pipe is fixed on the air inlet section outer frame, the other end of each air inlet pipe is opened and communicated with the corresponding air expanding pipe through a through hole in the air inlet section outer frame, the other end of each air expanding pipe is communicated and fixed with an air outlet of each blower, and a plurality of through holes are formed in the side wall of each air inlet pipe;
the air outlet pipes of the upper air outlet section and the lower air outlet section and the air inlet pipe of the air inlet section are perpendicular to grain channels of the upper microwave drying section and the lower microwave drying section.
Preferably, the cross section of the air outlet pipe is approximately triangular, and the air outlet on the outer frame of the air outlet section matched with the air outlet pipe is also approximately triangular.
Preferably, the microwave generating assembly comprises a plurality of magnetrons, an upper magnetron mounting channel, a lower magnetron mounting channel and two punching plates, wherein the two punching plates are arranged in parallel, the upper magnetron mounting channel and the lower magnetron mounting channel are respectively arranged at the upper end and the lower end of the two punching plates, a waveguide channel is formed between the upper magnetron mounting channel and the lower magnetron mounting channel, two ends of the waveguide channel are sealed by a microwave drying section outer frame, a plurality of magnetrons are arranged in the upper magnetron mounting channel and the lower magnetron mounting channel, through holes are formed in the two punching plates, two ends of the upper magnetron mounting channel and the lower magnetron mounting channel are respectively opened, one end opening is communicated with an air outlet of a magnetron cooling fan arranged outside the microwave drying section outer frame through the through holes in the microwave drying section outer frame, and the other end opening is communicated with the outside atmosphere through the through holes in the microwave drying section outer frame.
Preferably, the upper magnetron mounting channel and the lower magnetron mounting channel comprise a mounting plate at the bottom, two side plates and a sealing plate at the top, and a plurality of magnetrons are equidistantly arranged on the mounting plate along the length direction.
Preferably, the top sealing plate of the upper magnetron mounting passage is an inverted V-shaped plate.
Preferably, the air inlet pipes are uniformly distributed in the outer frame of the air inlet section in an upper row and a lower row.
Preferably, the air inlet pipe is of an inverted V-shaped structure or an inverted triangle structure, and a plurality of through holes are formed in the outer wall of the air inlet pipe.
Preferably, the air expansion pipes comprise an expansion part and a necking part, the expansion part is fixedly connected with the air inlet section outer frame, the expansion part of each air expansion pipe is covered at the opening ends of a plurality of air inlet pipes which are arranged in adjacent arrays and communicated with the opening ends, and the necking part is communicated and fixed with the air outlet of the air feeder.
The invention discloses a microwave convection coupling grain drying system, which comprises a tempering module, a grain flow control module, a grain flow direction controller, a lifting conveying module, a feeding module, a discharging module and a control system, wherein the feeding module is output and communicated with a first input port of the lifting conveying module, an output port of the lifting conveying module is communicated with an input port of the grain flow direction controller, the first output port of the grain flow direction controller is sequentially connected with the tempering Su Mokuai, the drying module and the grain flow control module, the output port of the grain flow control module is communicated with a second input port of the lifting conveying module, the second output port of the grain flow direction controller is communicated with an input port of the discharging module, and the control system is used for controlling the working state of each module.
Preferably, the drying module, the tempering module, the grain flow control module, the grain flow direction controller, the lifting conveying module, the feeding module and the discharging module form a dryer, wherein the tempering Su Mokuai module and the drying module are matched for use, the drying system comprises at least one tempering Su Mokuai and the drying module, and the grain flow control module comprises a grain discharge motor for discharging grain flow in the grain flow control module to a second input port at the bottom of the lifting conveying module; a three-way electromagnetic valve is arranged in the grain flow controller and corresponds to the input port, the first output port and the second output port of the grain flow controller respectively; the control system comprises a main controller, a solid voltage regulator, a temperature sensor and an online water content measuring instrument, wherein the solid voltage regulator is used for powering on a magnetron, the temperature sensor is used for measuring the temperature of grains discharged out of each drying module, the online water content measuring instrument is used for measuring the water content of grains at the bottom of the lifting conveying module, and the main controller is used for controlling the working state of each module according to each measurement data.
The invention discloses a microwave convection coupling grain drying method based on a drying system, which comprises the following steps:
s1, a feeding stage: starting a feeding module and a lifting conveying module, closing a grain discharging motor matched with a grain flow control module, enabling grains to be input into a buffer Su Mokuai below through a three-way electromagnetic valve by a grain flow controller, enabling the grains to fall into the bottom of the dryer from top to bottom until the uppermost buffer Su Mokuai is gradually filled, and enabling the grains not to circularly flow in the dryer at the stage;
s2, a drying stage: closing a feeding module, keeping a lifting conveying module to operate, starting a grain discharging motor matched with a grain flow control module, enabling a three-way electromagnetic valve station of a grain flow controller to be unchanged, enabling a blower and a magnetron cooling fan, setting grain drying temperature through a control system, enabling a microwave drying section, powering on all microwave magnetrons through a solid-state voltage regulator, measuring the temperature of grains discharged from each drying module through a temperature sensor, and outputting a control signal to the solid-state voltage regulator by the control system according to the measured grain temperature and the set grain temperature difference value so as to respectively regulate the microwave output power of each drying module; in the process, grains circularly flow in the buffer Su Mokuai and the drying modules until the grain moisture measured by the online moisture content measuring instrument at the bottom of the lifting conveying module reaches the preset termination moisture, the microwave drying sections of the drying modules are powered off, and the blower and the magnetron cooling fan are turned off;
s3, unloading: and (3) regulating a three-way electromagnetic valve of the grain flow controller to enable the three-way electromagnetic valve to be positioned at a grain unloading station, enabling grains to flow into an unloading module for unloading, and keeping the grain flow control module and the lifting conveying module to operate until all grains in the dryer are unloaded.
The beneficial effects are that: compared with the prior art, the invention has the technical effects that: according to the invention, microwaves and air convection are jointly acted on grain seeds to achieve both grain quality maintenance and quick drying, after the grain seeds enter a microwave heating channel, the moisture in the grain seeds absorbs the microwave energy to enable the temperature of the grain seeds to be quickly increased and the internal moisture pressure to be quickly increased, moisture can be quickly discharged from the grain seeds under the action of pressure gradient, and then the moisture is brought out of a drying module through air flow contacted with the surface of the grain seeds to be finally discharged into the atmosphere; when the grain seeds are dried by microwaves, the higher the moisture content of the grain seeds is, the larger the influence of the pressure gradient on the moisture discharge is, namely, a pump effect is provided, the moisture is driven to flow to the surfaces of the grains, and the drying speed is increased; the temperature gradient, heat transfer and vapor pressure migration directions are the same in the microwave drying process, and compared with the traditional hot air drying, the moisture migration condition in the drying process is greatly improved; therefore, the microwave convection coupling drying structure disclosed by the invention is beneficial to reducing the moisture gradient in the grains, and realizes the balance of grain quality maintenance and quick drying.
Drawings
FIG. 1 is a schematic diagram of a microwave convection coupled drying structure;
FIG. 2 is a flow chart of the operation of the microwave convection coupled drying structure;
FIG. 3 is a front view of the air outlet section;
FIG. 4 is a three-dimensional view of an air-out section;
FIG. 5 is a three-dimensional view of a microwave drying section;
FIG. 6 is a front elevational view in full section of the microwave drying section;
FIG. 7 is a bottom view of the microwave drying section with the magnetron housing and the grain passage end surfaces removed;
FIG. 8 is a front view of the microwave drying section with the magnetron housing and the grain passage end surfaces removed;
FIG. 9 is a top view of the microwave drying section with the magnetron housing and the grain passage end surfaces removed;
FIG. 10 is a three-dimensional view of the microwave drying section after removal of the magnetron housing and the grain passage end surfaces;
FIG. 11 is a two-dimensional partial cross-sectional view of an air intake section;
FIG. 12 is a three-dimensional view of an intake section;
FIG. 13 is a three-dimensional partial cross-sectional view of an air intake section;
FIG. 14 is a flow chart of a drying method;
in the figure: the microwave oven comprises an upper air outlet section 1, an upper microwave drying section 2, an air inlet section 3, a lower microwave drying section 4, an lower air outlet section 5, an air outlet pipe 11, an air outlet section 12, an air outlet 121, a microwave generating component 21, a microwave drying section 22, a magnetron cooling fan 23, a magnetron 24, a magnetron 25 mounting channel, a magnetron 26 mounting channel, a perforated plate 27, a mounting plate 201, a side plate 202, a waveguide 203, a grain 204 channel, an air inlet pipe 31, an air outlet pipe 32, an air blower 33 and an air inlet section 34.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
The microwave drying has better non-thermal drying property, and can lead the moisture in the grain grains to migrate rapidly at relatively lower temperature. The microwave heating enables the pressure of moisture in the grains to rise rapidly, and the moisture can be discharged from materials rapidly under the action of pressure gradient. The higher the grain moisture, the greater the impact of the pressure gradient on the moisture removal, i.e., a "pumping" effect, driving the moisture to the grain surface, accelerating the drying rate. In the microwave drying process, the temperature gradient, heat transfer and vapor pressure migration directions are uniform, and compared with the traditional hot air drying, the moisture migration condition in the drying process is greatly improved. The microwave drying has the characteristic of drying from inside to outside, and the inner layer of the seeds is firstly dried corresponding to single seeds, so that the defect that hard shell hardening is formed to prevent the internal moisture from continuously moving outwards due to the first drying of the outer layer of the seeds in the conventional hot air drying is overcome.
As shown in fig. 1, the microwave convection coupling grain drying module sequentially comprises an upper air outlet section 1, an upper microwave drying section 2, an air inlet section 3, a lower microwave drying section 4 and a lower air outlet section 5 from top to bottom, wherein the upper air outlet section 1 and the lower air outlet section 5 have the same structure, the upper microwave drying section 2 and the lower microwave drying section 4 have the same structure, and the air inlet section is positioned in the middle of the whole module structure.
Grain in the drying process is filled in the drying module and slowly flows from top to bottom and sequentially passes through the upper air outlet section 1, the upper microwave drying section 2, the air inlet section 3, the lower microwave drying section 4 and the lower air outlet section 5; after being sucked by a blower 33, the ambient air is blown into an air inlet pipe 31 distributed in an air inlet section 3 and is divided into an upper microwave drying section and a lower microwave drying section under the action of wind pressure, so that moisture on the surfaces of grain seeds in a grain channel is taken away, the moisture enters an upper air outlet section and a lower air outlet section respectively, and finally the moisture is discharged into the atmosphere from two ends of an air outlet pipe 11 distributed in the air outlet channel, wherein the specific process is shown in fig. 2, and thin arrows represent the air flowing direction; the thick arrows indicate the material (grain) flow direction.
As shown in fig. 3 and fig. 4, the upper air outlet section 1 and the lower air outlet section 5 each comprise a plurality of air outlet pipes 11 and an air outlet section outer frame 12, a plurality of air outlets 121 are symmetrically arranged on two opposite sides of the outer frame, the air outlet pipes 11 are arranged in the outer frame 12 in parallel, and two ends of the air outlet pipes 11 are opened and fixedly communicated with the air outlets 121 respectively so as to be communicated with the outside atmosphere; the outer wall of the air outlet pipe 11 is provided with dense through holes, so that air flow can enter the air outlet pipe 11 from the material layer and be discharged into the atmosphere through the air outlet 121, but materials (grains) cannot enter the air outlet pipe 11 through the through holes. In the embodiment, the cross section of the air outlet pipe 11 is similar to a triangle, and the slope formed by the triangle can guide grains so as to prevent the grains from falling on the air pipe; the outlet 121 is also approximately triangular.
As shown in fig. 5 to 10, the upper microwave drying section 2 and the lower microwave drying section 4 each include a plurality of microwave generating components 21, a microwave drying section outer frame 22 and a plurality of magnetron cooling fans 23, the plurality of microwave generating components 21 are fixedly arranged in parallel in the microwave drying section outer frame 22, two ends of the microwave generating components are opened, one end of the microwave generating component is opened and communicated with an air outlet of the magnetron cooling fans 23 through a through hole in the microwave drying section outer frame 22, the other end of the microwave generating component is opened and communicated with the outside atmosphere through a through hole in the microwave drying section outer frame 22, and a grain channel 204 is formed in a space between two adjacent microwave generating components 21.
In this embodiment, the microwave generating assembly 21 includes a plurality of magnetrons 24, an upper magnetron installation channel 25, a lower magnetron installation channel 26 and two perforated plates 27, the two perforated plates 27 are arranged in parallel, the upper magnetron installation channel 25 and the lower magnetron installation channel 26 are respectively arranged at the upper end and the lower end of the two perforated plates 27, a waveguide channel 203 is formed between the upper magnetron installation channel and the lower magnetron installation channel and the two perforated plates 27, two ends of the waveguide channel 203 are sealed by an outer frame 22 of a microwave drying section, a plurality of magnetrons 24 are arranged in the upper magnetron installation channel and the lower magnetron installation channel, two perforated plates 27 are respectively provided with through holes, two ends of the upper magnetron installation channel 25 and the lower magnetron installation channel 26 are respectively opened, one end of each of the two perforated plates is opened through the through holes on the outer frame 22 of the microwave drying section and an air outlet of a magnetron cooling fan 23 arranged outside the outer frame 22 of the microwave drying section, and the other end of each of the openings is communicated with the outside atmosphere through the through holes on the outer frame 22 of the microwave drying section.
The upper magnetron mounting passage 25 and the lower magnetron mounting passage 26 are similar in structure and comprise a mounting plate 201 at the bottom, two side plates 202 and a sealing plate at the top, wherein the two side plates 202 are symmetrically arranged at two sides of the mounting plate 201 to form a U-shaped structure, and a plurality of magnetrons 24 are uniformly distributed on the mounting plate 201 along the length direction in the U-shaped structure; the difference is that the sealing plate arranged at the top of the upper magnetron mounting channel 25 is an inverted V-shaped plate for isolating grains from flowing into the mounting channel and forming a magnetron heat dissipation air duct, and simultaneously playing a role in guiding the grains; the sealing plate of the lower magnetron mounting passage 26 is a flat plate, only plays a role in isolating grains and forming a magnetron heat dissipation air duct, and has no influence on the flow of grains in the drying module; both ends of the upper magnetron mounting passage 25 and the lower magnetron mounting passage 26 are fixedly communicated with an upper row of through holes and a lower row of through holes on the opposite sides of the outer frame 22 of the microwave drying section respectively; the magnetron cooling fan 23 is arranged on the outer side of the side wall of the outer frame 22 of the microwave drying section, and is respectively communicated with the upper magnetron mounting passage 25 and the lower magnetron mounting passage 26 through holes, and heat dissipation air flow is discharged into the atmosphere from an opening opposite to the cooling fan; the space between two adjacent microwave generating assemblies 21 forms a grain channel 204; the magnetron cooling fan 23 blows cold air into the upper and lower magnetron mounting channels to cool down and ensure the service life of the magnetron cooling fan. The perforated plates 27 are provided with dense through holes, microwaves pass through the dense through holes of the perforated plates at two sides and enter grain materials in the grain channel, heat and dry the grain seeds, and act on the grain seeds together with air flow flowing through the dense through holes, so that moisture migrating to the grain surface is evaporated and is rapidly discharged out of a grain layer along with the air flow; the structure considers the penetration depth of microwaves in the grain layer, and can achieve the purposes of uniform heating and uniform drying.
In this embodiment, magnetrons 24 are arranged in two rows in an equidistant array in upper and lower magnetron mounting lanes 25, 26 of the microwave generating assembly 21; and a plurality of groups of microwave generating assemblies 21 are arranged in the microwave drying section 2 in an equidistant array.
As shown in fig. 11 to 13, the air intake section 3 includes a plurality of air intake pipes 31, a plurality of air expansion pipes 32, a plurality of blowers 33 and an air intake section outer frame 34, the plurality of air intake pipes 31 are uniformly arranged in the air intake section outer frame 34 in two rows up and down, one end of the air intake pipe 31 is fixed on the air intake section outer frame 34, the other end is opened and is communicated with the flaring part of the air expansion pipes 32 through a through hole on the air intake section outer frame 34, and the contraction part at the other end of the air expansion pipes 32 is communicated and fixed with the air outlet of the blowers 33; the air expansion pipes 32 are positioned at the outer side of the air inlet section outer frame 34, the opening parts of the air expansion pipes 32 are fixedly connected with the air inlet section outer frame 34, in the embodiment, each air expansion pipe 32 is covered at the opening ends of four air inlet pipes 31 arranged in adjacent arrays and is communicated with the opening ends of the four air inlet pipes 31; the air inlet pipe 31 is of an inverted V-shaped structure or an inverted triangle structure, consumable materials and manufacturing workload can be reduced by adopting the inverted V-shaped structure, and dense through holes are formed in the outer wall of the air inlet pipe, so that air flow can uniformly enter the material layer, but materials cannot pass through the through holes to enter the air inlet pipe 31. The air outlets of the air blowers 33 are positioned in the middle of the adjacent 4 air inlet pipes 31, so that the ventilation states of the 4 air inlet pipes 31 are basically consistent, and the purpose of uniform air supply is achieved. In addition, all of the air inlet duct 31 and the air outlet duct 11 are perpendicular to the grain passage in the microwave drying section (line-to-plane).
The utility model provides a microwave convection coupling grain drying system, including drying module, tempering module, grain flow control module, grain flow direction controller, promote transport module, feeding module, unloading module and control system, feeding module output and the first input port intercommunication that promotes transport module, the delivery outlet that promotes transport module and the input port intercommunication of grain flow direction controller, the first delivery outlet of grain flow direction controller connects gradually Su Mokuai, drying module and grain flow control module, the delivery outlet of grain flow control module and the second input port intercommunication that promotes transport module, the second delivery outlet of grain flow direction controller and the input port intercommunication of unloading module, control system is used for controlling the operating condition of each module.
The drying module, the tempering module, the grain flow control module, the grain flow direction controller, the lifting conveying module, the feeding module and the discharging module form a mechanical part of a drying system, namely a dryer, and the mechanical part is controlled by a control system; the grain flow control module comprises a grain discharge motor and a second input port, wherein the grain discharge motor is used for discharging grain flow in the grain flow control module to the bottom of the lifting conveying module; a three-way electromagnetic valve is arranged in the grain flow controller and corresponds to the input port, the first output port and the second output port of the grain flow controller respectively; the control system comprises a main controller, a solid voltage regulator, a temperature sensor and an online water content measuring instrument, wherein the solid voltage regulator is used for powering on a magnetron, the temperature sensor is used for measuring the temperature of grains discharged out of each drying module, the online water content measuring instrument is used for measuring the water content of grains at the bottom of the lifting conveying module, and the main controller is used for controlling the working state of each module according to each measurement data.
During working, in the feeding stage, grain materials sequentially pass through the feeding module, the lifting conveying module and the grain flow direction controller and then enter the tempering module and the drying module, and after the grain materials are filled with the tempering Su Mokuai and the drying module, the grain materials enter the drying stage; after entering the drying stage, the grains circulate in the buffer Su Mokuai, the drying module, the grain flow control module, the lifting conveying module and the grain flow direction controller in sequence until the moisture is reduced to the drying requirement, and then the grain flow direction is regulated, and the grains are discharged out of the drying system through the discharging module.
The buffer Su Mokuai and the drying module are matched for use, the whole drying system can comprise a plurality of buffer Su Mokuai and drying modules, in this embodiment, two buffer modules and two drying modules are taken as examples, as shown in fig. 14, grains to be dried enter the bottom of the lifting and conveying module from a first input port at the bottom of the lifting and conveying module through a feeding module, are lifted and output to a grain flow direction controller by the lifting and conveying module, then sequentially enter the buffer Su Mokuai I, the drying module I, the buffer Su Mokuai II, the drying module II and the grain flow control module from a first output port of the grain flow direction controller, and are output to a second input port at the bottom of the lifting and conveying module from a grain flow control module output port after the grains are filled with the two drying modules and the two buffer modules, and then circulate until drying is finished, and are output to a discharging module from a second output port of the grain flow direction controller.
A microwave convection coupling grain drying method comprises the following steps:
s1, a feeding stage: starting a feeding module and a lifting conveying module, closing a grain discharging motor matched with a grain flow control module, enabling grains to be input into a buffer Su Mokuai below through a three-way electromagnetic valve by a grain flow controller, and enabling the grains to fall into the bottom of the dryer from top to bottom until the uppermost buffer Su Mokuai is gradually filled, wherein the grains do not circularly flow in the dryer at the stage;
s2, a drying stage: closing a feeding module, keeping a lifting conveying module to operate, starting a grain discharging motor matched with a grain flow control module, enabling a three-way electromagnetic valve station of a grain flow controller to be unchanged, enabling a blower and a magnetron cooling fan, setting grain drying temperature through a control system, enabling a microwave drying section, powering on all microwave magnetrons through a solid-state voltage regulator, measuring the temperature of grains discharged from each drying module through a temperature sensor, and outputting a control signal to the solid-state voltage regulator by the control system according to the measured grain temperature and the set grain temperature difference value so as to respectively regulate the microwave output power of each drying module; in the process, grains circularly flow in the buffer Su Mokuai and the drying modules until the grain moisture measured by the online moisture content measuring instrument at the bottom of the lifting conveying module reaches the preset termination moisture, the microwave drying sections of the drying modules are powered off, and the blower and the magnetron cooling fan are turned off;
s3, unloading: and (3) regulating a three-way electromagnetic valve of the grain flow controller to enable the three-way electromagnetic valve to be positioned at a grain unloading station, enabling grains to flow into a grain unloading module for bagging or loading, and keeping the grain flow control module and the lifting conveying module to operate until all grains in the dryer are unloaded.
Claims (9)
1. The utility model provides a microwave convection coupling grain drying module which characterized in that, from top to bottom includes last air-out section (1), go up microwave drying section (2), air inlet section (3), lower microwave drying section (4) and lower air-out section (5) in proper order, go up air-out section (1) and lower air-out section (5) structure the same, all include a plurality of air-out pipes (11) and air-out section outer frame (12), a plurality of air-out pipes (11) are arranged in parallel in air-out section outer frame (12), air-out pipe (11) both ends opening to communicate fixedly with air outlet (121) on air-out section outer frame (12) respectively, a plurality of through-holes have been seted up to air-out pipe (11) outer wall;
the upper microwave drying section (2) and the lower microwave drying section (4) have the same structure and comprise a plurality of groups of microwave generating components (21), a microwave drying section outer frame (22) and a plurality of magnetron cooling fans (23), the plurality of groups of microwave generating components (21) are fixedly arranged in the microwave drying section outer frame (22) in parallel, two ends of the microwave generating components are open, one end of the microwave generating component is open and communicated with an air outlet of the magnetron cooling fans (23) through a through hole on the microwave drying section outer frame (22), the other end of the microwave generating component is open and communicated with the outside atmosphere through a through hole on the microwave drying section outer frame (22), and a grain channel (204) is formed in a space between two adjacent groups of microwave generating components (21);
the microwave generating assembly (21) comprises a plurality of magnetrons (24), an upper magnetron mounting channel (25), a lower magnetron mounting channel (26) and two punching plates (27), wherein the two punching plates (27) are arranged in parallel, the upper magnetron mounting channel and the lower magnetron mounting channel are respectively arranged at the upper end and the lower end of the two punching plates (27), a waveguide channel (203) is formed between the upper magnetron mounting channel and the lower magnetron mounting channel and the two punching plates (27), two ends of the waveguide channel are sealed by a microwave drying section outer frame (22), the magnetrons (24) are arranged in the upper magnetron mounting channel and the lower magnetron mounting channel, through holes are formed in the two punching plates (27), two ends of the upper magnetron mounting channel (25) and the lower magnetron mounting channel (26) are respectively opened, one end opening is communicated with an air outlet of a magnetron cooling fan (23) arranged outside the microwave drying section outer frame (22) through the through holes in the microwave drying section outer frame (22), and the other end opening is communicated with the outside atmosphere through the through holes in the microwave drying section outer frame (22);
the air inlet section (3) comprises a plurality of air inlet pipes (31), a plurality of air expansion pipes (32), a plurality of air blowers (33) and an air inlet section outer frame (34), wherein the air inlet pipes (31) are arranged in the air inlet section outer frame (34) in parallel, one end of each air inlet pipe (31) is fixed on the air inlet section outer frame (34), the other end of each air inlet pipe is opened and communicated with the corresponding air expansion pipe (32) through a through hole on the air inlet section outer frame (34), the other end of each air expansion pipe (32) is communicated and fixed with an air outlet of each air blower (33), and a plurality of through holes are formed in the side wall of each air inlet pipe;
the air outlet pipes (11) of the upper air outlet section (1) and the lower air outlet section (5) and the air inlet pipe (31) of the air inlet section (3) are perpendicular to grain channels of the upper microwave drying section (2) and the lower microwave drying section (4).
2. A microwave convection-coupled grain drying module according to claim 1, wherein the cross section of the air outlet pipe (11) is approximately triangular, and the air outlet (121) on the outer frame (12) of the air outlet section matched with the cross section is also approximately triangular.
3. The microwave convection-coupled grain drying module according to claim 1, wherein the upper magnetron mounting channel and the lower magnetron mounting channel each comprise a mounting plate (201) at the bottom, two side plates (202) and a sealing plate at the top, and a plurality of magnetrons (24) are equidistantly arranged on the mounting plate (201) along the length direction; the top sealing plate of the upper magnetron mounting passage (25) is an inverted V-shaped plate.
4. The microwave convection-coupled grain drying module according to claim 1, wherein the air inlet pipes (31) are uniformly arranged in the air inlet section outer frame (34) in two rows.
5. The microwave convection-coupled grain drying module according to claim 1, wherein the air inlet pipe (31) has an inverted V-shaped structure or an inverted triangle-shaped structure, and a plurality of through holes are formed in an outer wall thereof.
6. The microwave convection coupling grain drying module according to claim 1, wherein the air expansion pipes (32) comprise an expansion part and a contraction part, the expansion part is fixedly connected with the air inlet section outer frame (34), the expansion part of each air expansion pipe (32) is covered at the opening ends of a plurality of air inlet pipes (31) arranged in adjacent arrays and communicated with each other, and the contraction part is communicated with and fixed with the air outlet of the air feeder (33).
7. A microwave convection coupling grain drying system, which is characterized by comprising a drying module according to any one of claims 1-6, and further comprising a tempering module, a grain flow control module, a grain flow direction controller, a lifting conveying module, a feeding module, a discharging module and a control system, wherein the output of the feeding module is communicated with a first input port of the lifting conveying module, an output port of the lifting conveying module is communicated with an input port of the grain flow direction controller, the first output port of the grain flow direction controller is sequentially connected with the tempering Su Mokuai module, the drying module and the grain flow control module, the output port of the grain flow control module is communicated with a second input port of the lifting conveying module, the second output port of the grain flow direction controller is communicated with an input port of the discharging module, and the control system is used for controlling the working state of each module.
8. The microwave convection coupled grain drying system of claim 7, wherein the drying module, the tempering module, the grain flow control module, the grain flow direction controller, the lifting and conveying module, the feeding module and the discharging module form a dryer, wherein the tempering Su Mokuai module and the drying module are matched for use, the drying system comprises at least one group of tempering Su Mokuai module and the drying module, and the grain flow control module comprises a grain discharge motor for discharging grain flow in the grain flow control module to a second input port at the bottom of the lifting and conveying module; a three-way electromagnetic valve is arranged in the grain flow controller and corresponds to the input port, the first output port and the second output port of the grain flow controller respectively; the control system comprises a main controller, a solid voltage regulator, a temperature sensor and an online water content measuring instrument, wherein the solid voltage regulator is used for powering on a magnetron, the temperature sensor is used for measuring the temperature of grains discharged out of each drying module, the online water content measuring instrument is used for measuring the water content of grains at the bottom of the lifting conveying module, and the main controller is used for controlling the working state of each module according to each measurement data.
9. A method of microwave convection coupled grain drying based on the drying system of claim 8, comprising the steps of:
s1, a feeding stage: starting a feeding module and a lifting conveying module, closing a grain discharging motor matched with a grain flow control module, enabling grains to be input into a buffer Su Mokuai below through a three-way electromagnetic valve by a grain flow controller, enabling the grains to fall into the bottom of the dryer from top to bottom until the uppermost buffer Su Mokuai is gradually filled, and enabling the grains not to circularly flow in the dryer at the stage;
s2, a drying stage: closing a feeding module, keeping a lifting conveying module to operate, starting a grain discharging motor matched with a grain flow control module, enabling a three-way electromagnetic valve station of a grain flow controller to be unchanged, enabling a blower and a magnetron cooling fan, setting grain drying temperature through a control system, enabling a microwave drying section, powering on all microwave magnetrons through a solid-state voltage regulator, measuring the temperature of grains discharged from each drying module through a temperature sensor, and outputting a control signal to the solid-state voltage regulator by the control system according to the measured grain temperature and the set grain temperature difference value so as to respectively regulate the microwave output power of each drying module; in the process, grains circularly flow in the buffer Su Mokuai and the drying modules until the grain moisture measured by the online moisture content measuring instrument at the bottom of the lifting conveying module reaches the preset termination moisture, the microwave drying sections of the drying modules are powered off, and the blower and the magnetron cooling fan are turned off;
s3, unloading: and (3) regulating a three-way electromagnetic valve of the grain flow controller to enable the three-way electromagnetic valve to be positioned at a grain unloading station, enabling grains to flow into an unloading module for unloading, and keeping the grain flow control module and the lifting conveying module to operate until all grains in the dryer are unloaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210925319.XA CN115451661B (en) | 2022-08-03 | 2022-08-03 | Microwave convection coupling grain drying module, drying system and drying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210925319.XA CN115451661B (en) | 2022-08-03 | 2022-08-03 | Microwave convection coupling grain drying module, drying system and drying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115451661A CN115451661A (en) | 2022-12-09 |
| CN115451661B true CN115451661B (en) | 2023-11-14 |
Family
ID=84296885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210925319.XA Active CN115451661B (en) | 2022-08-03 | 2022-08-03 | Microwave convection coupling grain drying module, drying system and drying method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115451661B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090112019A (en) * | 2008-04-23 | 2009-10-28 | 한성공업 주식회사 | Rice circulating concurrent-flow dryer |
| CN104160232A (en) * | 2012-03-06 | 2014-11-19 | 株式会社佐竹 | Method for drying grain |
| CN105285091A (en) * | 2015-09-17 | 2016-02-03 | 武汉轻工大学 | Grain continuous drying machine and grain continuous drying method |
| CN105865184A (en) * | 2016-06-14 | 2016-08-17 | 周友明 | Drying system for continuous circulated operation |
| CN105910415A (en) * | 2016-06-13 | 2016-08-31 | 湖南省三力士农机制造有限公司 | Continuous material microwave drying method and microwave dryer |
| CN105928323A (en) * | 2016-04-28 | 2016-09-07 | 华中农业大学 | Grain microwave and fluidization combined drying equipment, drying method and application |
| CN106871577A (en) * | 2017-01-18 | 2017-06-20 | 江苏麦克威微波技术有限公司 | A kind of microwave material drying device and microwave material drying means |
| WO2018176690A1 (en) * | 2017-03-31 | 2018-10-04 | 济宁学院 | Energy-saving environmentally-friendly integrated fluidized bed drying system and processing method based on multi-stage microwave heating |
| CN109883141A (en) * | 2019-02-25 | 2019-06-14 | 安徽省沃昇机电科技有限公司 | A kind of microwave grain drier |
| CN110006236A (en) * | 2019-02-01 | 2019-07-12 | 云浮中科石材创新科技有限公司 | A kind of microwave drying equipment hydrofuge equipment |
| CN210374304U (en) * | 2019-09-06 | 2020-04-21 | 昆山鹿和工程机械有限公司 | Low-temperature circulating type drying machine |
| CN213208504U (en) * | 2020-10-16 | 2021-05-14 | 苏小敏 | Tea leaf drying machine |
| CN113606872A (en) * | 2021-08-02 | 2021-11-05 | 农业农村部南京农业机械化研究所 | Fluidized bed dryer based on graphene far-infrared heating and drying method thereof |
| CN114739122A (en) * | 2022-04-25 | 2022-07-12 | 农业农村部南京农业机械化研究所 | Grain circulating dryer of vibrating fluidized bed based on microwave heating |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050082283A1 (en) * | 2003-10-17 | 2005-04-21 | William Hein | Microwave dryer |
-
2022
- 2022-08-03 CN CN202210925319.XA patent/CN115451661B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090112019A (en) * | 2008-04-23 | 2009-10-28 | 한성공업 주식회사 | Rice circulating concurrent-flow dryer |
| CN104160232A (en) * | 2012-03-06 | 2014-11-19 | 株式会社佐竹 | Method for drying grain |
| CN105285091A (en) * | 2015-09-17 | 2016-02-03 | 武汉轻工大学 | Grain continuous drying machine and grain continuous drying method |
| CN105928323A (en) * | 2016-04-28 | 2016-09-07 | 华中农业大学 | Grain microwave and fluidization combined drying equipment, drying method and application |
| CN105910415A (en) * | 2016-06-13 | 2016-08-31 | 湖南省三力士农机制造有限公司 | Continuous material microwave drying method and microwave dryer |
| CN105865184A (en) * | 2016-06-14 | 2016-08-17 | 周友明 | Drying system for continuous circulated operation |
| CN106871577A (en) * | 2017-01-18 | 2017-06-20 | 江苏麦克威微波技术有限公司 | A kind of microwave material drying device and microwave material drying means |
| WO2018176690A1 (en) * | 2017-03-31 | 2018-10-04 | 济宁学院 | Energy-saving environmentally-friendly integrated fluidized bed drying system and processing method based on multi-stage microwave heating |
| CN110006236A (en) * | 2019-02-01 | 2019-07-12 | 云浮中科石材创新科技有限公司 | A kind of microwave drying equipment hydrofuge equipment |
| CN109883141A (en) * | 2019-02-25 | 2019-06-14 | 安徽省沃昇机电科技有限公司 | A kind of microwave grain drier |
| CN210374304U (en) * | 2019-09-06 | 2020-04-21 | 昆山鹿和工程机械有限公司 | Low-temperature circulating type drying machine |
| CN213208504U (en) * | 2020-10-16 | 2021-05-14 | 苏小敏 | Tea leaf drying machine |
| CN113606872A (en) * | 2021-08-02 | 2021-11-05 | 农业农村部南京农业机械化研究所 | Fluidized bed dryer based on graphene far-infrared heating and drying method thereof |
| CN114739122A (en) * | 2022-04-25 | 2022-07-12 | 农业农村部南京农业机械化研究所 | Grain circulating dryer of vibrating fluidized bed based on microwave heating |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115451661A (en) | 2022-12-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105104521B (en) | A kind of grain drier | |
| CN205106216U (en) | Grain dryer | |
| CN104596218B (en) | A kind of dehydrator | |
| CN100552354C (en) | Double layer return air type drying device and drying means thereof | |
| CN114739122A (en) | Grain circulating dryer of vibrating fluidized bed based on microwave heating | |
| CN105300073A (en) | Belt drier | |
| CN110094944A (en) | A kind of batch microwave grain drier and drying means | |
| CN207197188U (en) | Utilize the heat pump fruit and vegetable drying machine of foraminous conveyer | |
| CN115451661B (en) | Microwave convection coupling grain drying module, drying system and drying method | |
| CN105841469A (en) | Gradient drying device for pine nuts | |
| CN104146209A (en) | Energy-saving type automatic control multi-room rice flour dryer | |
| CN106720293A (en) | A kind of grain drying device | |
| CN211120530U (en) | Microwave drying room for lost foam pattern | |
| CN103148691A (en) | Seed drying tower | |
| CN101176568A (en) | Heating type vegetable dewaterer combined with flow and air feed | |
| CN214665845U (en) | Novel non-tunnel type microwave drying equipment | |
| KR101621474B1 (en) | Apparatus for roasting and drying laver | |
| CN107677093A (en) | Dynamic Networks band heat pump fruit and vegetable drying machine | |
| CN209840691U (en) | Tunnel type ceramic wet blank drying kiln | |
| CN210569785U (en) | Heat exchange device of drying and conveying equipment | |
| CN111854343A (en) | Efficient drying room for drying EPP (expanded polypropylene) products | |
| CN219624416U (en) | Net belt dryer | |
| CN220398108U (en) | Tunnel type continuous rapid drying equipment | |
| CN219160897U (en) | Double-layer independent temperature-control mesh belt type dryer | |
| CN205613668U (en) | Two -sided convection heating oven |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |