CN110701892A - Grain drying method and apparatus - Google Patents
Grain drying method and apparatus Download PDFInfo
- Publication number
- CN110701892A CN110701892A CN201810743061.5A CN201810743061A CN110701892A CN 110701892 A CN110701892 A CN 110701892A CN 201810743061 A CN201810743061 A CN 201810743061A CN 110701892 A CN110701892 A CN 110701892A
- Authority
- CN
- China
- Prior art keywords
- drying
- hot air
- microwave
- grains
- grain
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- F26B17/001—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement the material moving down superimposed floors
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- 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
- 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
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 grain drying method and a grain drying device, wherein grain is dried by using a combination of hot air and microwaves formed by the alternate action of hot air and microwave irradiation in the process that grains move downwards and slowly between two layers of ventilation plates.
Description
Technical Field
The invention belongs to the field of grain processing, and particularly relates to a method and a device for drying grains.
Background
At present, various grain drying machines mainly dry grains by hot air. The energy consumption for carrying out hot air drying on the grains with low water content is higher, and the quality of the grains is damaged.
Disclosure of Invention
The present invention has been made keeping in mind the above problems occurring in the prior art, and is intended to obviate or mitigate one or more of the problems in the prior art.
According to one aspect of the present invention, there is provided a method of drying grain using alternating hot air and microwave irradiation to dry the grain.
According to another aspect of the present invention, there is provided a grain drying device including a ventilation board, a hot air introduction means, and a microwave injection means, wherein the ventilation board includes a hot air drying section in which the ventilation board has a hot air inlet port through which hot air introduced by the hot air introduction means can enter and a hot air outlet port corresponding to the hot air inlet port, and a microwave drying section in which the ventilation board has a microwave introduction port through which microwaves can be irradiated through the microwave drying section.
Embodiments of the present invention apply microwave drying techniques to the drying of grains. Meanwhile, according to the characteristics of microwave drying, a microwave drying technology and a hot air drying technology are combined to form a new drying technology. The new combined drying technology fully exerts the advantages of two drying methods of microwave and hot air. That is, the advantages of high drying efficiency of the microwave to the low-moisture-content grains and good drying effect of the hot air to the high-moisture-content grains are fully utilized. Thereby forming a drying technology with complementary advantages of microwave drying and hot air drying.
Drawings
FIG. 1 is a schematic diagram of a drying process according to an embodiment of the present invention.
Fig. 2 is a schematic view of a drying process apparatus according to an embodiment of the present invention.
Detailed Description
The following detailed description of the invention, taken in conjunction with the accompanying drawings, is intended to be illustrative only and is not intended to limit the scope of the invention.
FIG. 1 is a schematic illustration of a method of drying grain according to one embodiment of the present invention. As shown in fig. 1, the grains 1 slowly move downwards between two layers of ventilation boards 2 and enter a first hot air drying section in the process of moving downwards. In hot air drying section one, hot-blast a gets into by one side of ventilating board 2, passes cereal 1, wears out by opposite side ventilating board 2, and cereal 1 reduces the moisture content because of being heated at this in-process.
The hot air drying time and the hot air temperature are based on the vitality of the grain which is not damaged, and the single precipitation rate is not required to be too large. According to one embodiment, the drying time can be adjusted by adjusting the speed of the grain 1 moving between the two layers of ventilation boards 2 according to the condition of the grain to be dried. According to one embodiment, the temperature and the speed of the hot air a can be adjusted according to the conditions of the grains to be dried.
Then, the grains heated by the hot wind a continuously and slowly move downwards between the double-layer ventilation plates 2 and enter the second microwave drying section. In this section, the waveguide 4 of the microwave injection device 3 guides the microwave into the microwave cavity 5 of the microwave injection device 3, which can emit the microwave, the microwave b emitted from the microwave cavity 5 irradiates the grains 1 between the ventilation plates 2, and after the grains 1 are irradiated by the microwave, the inside of the grains 1 generates heat and evaporates the water inside.
The microwave drying time and temperature are based on the vitality of the grain which is not damaged, and the single precipitation rate is not required to be too large. According to one embodiment, the drying time can be adjusted by adjusting the speed of the grain 1 moving between the two layers of ventilation boards 2 according to the condition of the grain to be dried. According to one embodiment, the intensity of the microwaves can be adjusted according to the conditions of the grain to be dried.
The moving speed of the grains in the microwave drying section and the hot air drying section can be respectively adjusted.
Then, the grains 1 slowly descend continuously and enter a first hot air drying section, hot air a in the first hot air drying section penetrates through the grains 1 and takes away moisture evaporated from a second microwave drying section, and therefore the moisture content of the grains 1 is reduced again. The grains are dried by a process of 'hot air drying-microwave drying' through microwaves b and hot air a. Or the grains are subjected to multiple combinations of microwave b and hot air a to realize grain drying, namely, the combination of hot air drying, microwave drying, hot air drying, microwave drying and hot air drying is carried out for multiple times. Thus, the ventilation board 2 may include a plurality of hot air drying sections and a plurality of microwave drying sections, and the plurality of hot air drying sections and the plurality of microwave drying sections are alternately arranged. The alternating arrangement does not mean that the number of the hot air drying sections and the microwave drying sections is necessarily the same, and one section may be smaller than the other. For example, it is possible to start with a hot air drying section and to end with a hot air drying section.
In the second "hot air drying-microwave drying" stage, the grains 1 are again subjected to the combined action of the hot air a and the microwaves b similar to the first "hot air drying-microwave drying" stage to further reduce the moisture.
In the second "hot air drying-microwave drying" section, the duration or length of the action of the hot air a and the microwave b has no relation with the duration or length of the first "hot air drying-microwave drying", and may be the same or different.
Fig. 2 shows a grain drying apparatus according to an embodiment of the present invention. As shown in fig. 2, the grain drying apparatus according to an embodiment of the present invention includes a grain inlet section 10, a ventilation plate 20, a grain outlet section 30, and a hot air introducing device and a microwave injecting device, which are not shown, wherein the ventilation plate includes a hot air drying section 21 and a microwave drying section 22. There may be a plurality of hot air drying sections 21 and a plurality of microwave drying sections 22, which are alternately arranged.
In the hot air drying section, the ventilation board is provided with a hot air inlet and a hot air outlet corresponding to the hot air inlet, the hot air introduced by the hot air introducing device can enter from the hot air inlet,
in the microwave drying section, the ventilation board has a microwave introduction port through which the microwaves can pass to microwave-irradiate through the microwave drying section.
According to one embodiment, the microwave injection device comprises a waveguide tube and a microwave cavity, the waveguide tube is used for guiding microwaves into the microwave cavity, and the microwave cavity is used for emitting the microwaves. The waveguide and microwave cavity may be implemented in various embodiments now known and in the future known in the art and will not be described in detail herein.
According to one embodiment, a moving speed adjusting device may be included to adjust the moving speed of the grains in the hot air drying section 21 and the microwave drying section 22. The moving speeds in the hot air drying section 21 and the microwave drying section 22 may be adjusted so that the moving speed of the grains in the hot air drying section 21 and the moving speed of the grains in the microwave drying section 22 are different. For example, the grain is conveyed by the first conveyor belt in the hot air drying section and the second conveyor belt in the microwave drying section, so that the speeds of the first conveyor belt and the second conveyor belt can be adjusted respectively, and the moving speeds of the hot air drying section 21 and the microwave drying section 22 can be adjusted respectively.
According to an embodiment of the present invention, the ventilation board 20 may be a ring, and an openable and closable flap device is provided between the ventilation board and the grain discharging section, so that after sufficient circulation has been performed, the flap device can be opened to discharge the grains from the grain discharging section 30. This saves space.
According to one embodiment, a hot air adjusting device may be included to adjust the temperature and the wind speed of the hot air.
According to one embodiment, a microwave conditioning device may be included to adjust the velocity of the microwaves.
According to one embodiment, the hot air drying section 21 and the microwave drying section 22 may each have a plurality of branches. The microwave drying section corresponding to the hot air drying section without branches can have a plurality of branches, thereby reducing the requirements on the power and the like of the microwave generating device.
The invention relates to a method for drying grains by using a combination of hot air and microwaves formed by the alternate action of hot air and microwave irradiation in the process that the grains move downwards and slowly between two layers of ventilation plates. The method comprises a process of 'hot air drying-microwave drying', and also comprises a combined drying method of 'hot air drying-microwave drying-hot air drying' formed by combining a plurality of microwaves and hot air.
The invention can reduce a large amount of water in the drying process of the grains with high water content and can also keep the quality, nutrition and life activity of the grains.
The invention introduces microwave as a heat source and combines the microwave with hot air for drying, thereby solving the problem that the energy consumption for drying the low-moisture-content grains is high and the grain quality is damaged in the hot air drying process. Therefore, the drying method of the invention develops a new field of microwave in the grain drying aspect and breaks through the method that the grain drying can be carried out only by hot air.
Claims (10)
1. A method for drying grains is characterized in that hot air and microwave irradiation are alternately used for drying the grains.
2. Method for drying grains according to claim 1, characterized in that the grains are moved between ventilation boards (2), during which movement the grains are dried in sections with alternating hot air and microwave irradiation, the speed of movement of the grains between the ventilation boards (2) being adjustable according to the grains and the humidity of the grains.
3. Method for drying grains according to claim 2, characterized in that the ventilation board is a double layer ventilation board, in the section for drying with hot air, hot air (a) is made to enter from one side of the ventilation board (2), to pass through the grains (1) and to exit from the ventilation board (2) on the other side, the wind speed and temperature of the hot air can be adjusted according to the humidity of the grains and grains.
4. Method for drying grains according to claim 2, characterized in that in the section for drying with microwaves, the microwaves are guided by a wave guide (4) into a microwave cavity (5) capable of emitting microwaves, the microwaves (b) emitted by the microwave cavity (5) illuminating the grains (1) between the ventilation plates (2), the intensity of the microwaves being adjustable.
5. The method of drying grain according to claim 1, wherein drying grain using alternating hot air and microwave irradiation comprises drying grain multiple times with hot air and multiple times with microwave irradiation.
6. A grain drying device is characterized by comprising a ventilation board, a hot air introducing device and a microwave injection device, wherein the ventilation board comprises a hot air drying section and a microwave drying section,
in the hot air drying section, the ventilation board is provided with a hot air inlet and a hot air outlet corresponding to the hot air inlet, the hot air introduced by the hot air introducing device can enter from the hot air inlet,
in the microwave drying section, the ventilation board has a microwave introduction port through which the microwaves can pass to microwave-irradiate through the microwave drying section.
7. The grain drying apparatus of claim 6, wherein the microwave injection device comprises a waveguide for guiding microwaves into the microwave cavity and a microwave cavity for emitting microwaves.
8. The grain drying apparatus of claim 6, wherein the ventilation board comprises a plurality of hot air drying sections and a plurality of microwave drying sections, and the plurality of hot air drying sections and the plurality of microwave drying sections are arranged alternately.
9. The grain drying device of claim 6, further comprising a movement speed adjusting device for adjusting the movement speed of the grains through the hot air drying section and the microwave drying section.
10. The grain drying apparatus of claim 8, wherein the microwave drying section of one hot air drying section comprises a plurality of branches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810743061.5A CN110701892A (en) | 2018-07-09 | 2018-07-09 | Grain drying method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810743061.5A CN110701892A (en) | 2018-07-09 | 2018-07-09 | Grain drying method and apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110701892A true CN110701892A (en) | 2020-01-17 |
Family
ID=69192194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810743061.5A Pending CN110701892A (en) | 2018-07-09 | 2018-07-09 | Grain drying method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110701892A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114353500A (en) * | 2022-02-28 | 2022-04-15 | 长安大学 | Heating control system and control method for drying aggregate |
| CN114576972A (en) * | 2022-03-22 | 2022-06-03 | 安徽正阳机械科技有限公司 | No auger desiccator based on cereal humidity control stoving speed |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2368297Y (en) * | 1999-04-09 | 2000-03-15 | 李建刚 | Pesticidal drying apparatus for cereal seeds |
| DE10111582C1 (en) * | 2001-03-10 | 2002-05-02 | Ludwig Volk | Drying assembly, for loose agricultural products, has a microwave generator at the conveyor stretch through the dryer with a waveguide which can be set in relation to the conveyor according to the material |
| CN104663876A (en) * | 2015-01-21 | 2015-06-03 | 常州大学 | Unhusked rice drying device under effect of combination of ultrasonic waves and hot air |
| 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 |
-
2018
- 2018-07-09 CN CN201810743061.5A patent/CN110701892A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2368297Y (en) * | 1999-04-09 | 2000-03-15 | 李建刚 | Pesticidal drying apparatus for cereal seeds |
| DE10111582C1 (en) * | 2001-03-10 | 2002-05-02 | Ludwig Volk | Drying assembly, for loose agricultural products, has a microwave generator at the conveyor stretch through the dryer with a waveguide which can be set in relation to the conveyor according to the material |
| CN104663876A (en) * | 2015-01-21 | 2015-06-03 | 常州大学 | Unhusked rice drying device under effect of combination of ultrasonic waves and hot air |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114353500A (en) * | 2022-02-28 | 2022-04-15 | 长安大学 | Heating control system and control method for drying aggregate |
| CN114576972A (en) * | 2022-03-22 | 2022-06-03 | 安徽正阳机械科技有限公司 | No auger desiccator based on cereal humidity control stoving speed |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10533799B2 (en) | System and method of removing moisture from fibrous or porous materials using microwave radiation and RF energy | |
| US9335093B2 (en) | Systems and methods for efficient microwave drying of extruded honeycomb structures | |
| US20200166273A1 (en) | System and Method of Removing Moisture from Fibrous or Porous Materials Using Microwave Radiation and RF Energy | |
| US20080104857A1 (en) | Multistage Continuous Microwave Dryer For Plate-Shaped Products, Especially Fiber Boards | |
| CN110701892A (en) | Grain drying method and apparatus | |
| KR102191043B1 (en) | Drying device for agricultural and marine products using with microwave | |
| KR102266685B1 (en) | heat treatment furnace | |
| KR100799345B1 (en) | Bulk type far infrared ray a dryer | |
| CN110037327B (en) | Tobacco flake redrying equipment and tobacco flake redrying method | |
| CN102721271A (en) | Ginger rapid drying device | |
| DE3546129A1 (en) | MICROWAVE FOOD DRYER | |
| AU2015401733B2 (en) | Dehydration apparatus and dehydration process | |
| US3624806A (en) | Method of heat treating by convection objects, such as flat individual blanks, molded pulp articles or continuous webs or threads, for example for plastic fibers, and a kiln for use in the method | |
| KR20150037451A (en) | Manufacturing System for Rapid Kimchi Cabbage Salting and Low Salt Kimchi | |
| CN110186253B (en) | Microwave dryer for grain processing and drying method thereof | |
| KR100665659B1 (en) | Apparatus for grain drying by using hot aircirculation | |
| CN102181944A (en) | Method for carrying out silkworm cocoon secondary processing and special equipment thereof | |
| JP2019076020A (en) | Hiki cha (tea) processing apparatus | |
| US20180162010A1 (en) | Device for continuous heating of material | |
| KR101835028B1 (en) | Drying apparatus with a plurality of ejector | |
| CN1923503B (en) | Honeycomb paper core used forming machine | |
| CN205270078U (en) | Ultraviolet (UV) drying machine | |
| US2862305A (en) | Apparatus for drying strip material | |
| CN104054798A (en) | Meat product drying device | |
| RU2483571C1 (en) | Toroidal apparatus for production of fruit and vegetable chips |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200117 |