CN113498872A - Far infrared combined heat pump drying device and peanut drying method - Google Patents
Far infrared combined heat pump drying device and peanut drying method Download PDFInfo
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- CN113498872A CN113498872A CN202110961452.6A CN202110961452A CN113498872A CN 113498872 A CN113498872 A CN 113498872A CN 202110961452 A CN202110961452 A CN 202110961452A CN 113498872 A CN113498872 A CN 113498872A
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23N—MACHINES OR APPARATUS FOR TREATING HARVESTED FRUIT, VEGETABLES OR FLOWER BULBS IN BULK, NOT OTHERWISE PROVIDED FOR; PEELING VEGETABLES OR FRUIT IN BULK; APPARATUS FOR PREPARING ANIMAL FEEDING- STUFFS
- A23N12/00—Machines for cleaning, blanching, drying or roasting fruits or vegetables, e.g. coffee, cocoa, nuts
- A23N12/08—Machines for cleaning, blanching, drying or roasting fruits or vegetables, e.g. coffee, cocoa, nuts for drying or roasting
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- 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
Abstract
The invention provides a far infrared combined heat pump drying device and a peanut drying method, which are used for solving the technical problems of low safety, low dehumidification efficiency and non-uniform drying rate of single far infrared radiation drying of the traditional peanut drying method. The far infrared combined heat pump drying device provided by the invention can solve the problems of low heating rate and low efficiency in the early stage of peanut drying and low efficiency in the later stage of drying in single heat pump drying and the problems of high drying rate, high drying strength and difficult loss of flower and fruit moisture in single far infrared drying, is not easy to cause microbial pollution in the drying process, is suitable for drying and processing various heat-sensitive materials, can recover sensible heat and latent heat in waste steam, and reduces the energy consumption in flower and fruit drying by using combined heating, dehumidifying and drying. Compared with the existing hot air peanut drying method, the peanut drying method has the advantages that the drying time is shortened by 30-50%, and the energy consumption is reduced by 20-30%.
Description
Technical Field
The invention relates to the technical field of agricultural product producing area processing, in particular to a far infrared combined heat pump drying device and a peanut drying method.
Background
Peanuts are important economic crops and oil crops in China, are rich in nutrients such as fat, protein and mineral substances, have the effects of delaying senescence, resisting tumors and the like, and are called as 'growing fruits'. As the first large oil crop in China, the total peanut yield, the total consumption and the export of peanuts in China are all in the top of the world. The moisture content of the peanuts during harvesting is generally high and is generally 50-60% (moisture content of a wet base). In order to prevent the peanuts from mildewing, oil immersion, rancidity and the like in the later transportation, storage, processing and other processes, the production area needs to be dried in time.
The traditional drying method of peanuts is a natural airing method, although the operation is simple and extra energy output is not needed, the drying period is long, the drying state is unstable, the resource demand of a sunning ground is huge, the peanut harvesting season is concentrated in 8-10 months, and the high-temperature and high-humidity environment is easy to cause micro-mildew, particularly aspergillus flavus, and the safety of the peanuts is seriously influenced. According to statistics, the loss of peanuts which lose edible value and commodity value due to mildew in China accounts for 10% -20% of the total yield, particularly, the loss in local areas in China in 2017 is up to more than 50%, and the loss in serious areas is up to 70%, even extremely low, so that economic loss is very disastrous, and the healthy development of the flower production industry is severely restricted. Therefore, green, energy-saving and efficient mechanical drying technology and equipment are always the key points and difficulties in peanut drying research.
The heat pump drying has the advantages of low energy consumption, low drying temperature, wide adjustable range of drying conditions, easy control of operation process, high product quality, environmental friendliness and the like, and is widely applied to drying of thermosensitive materials such as wood, fruits and vegetables, aquatic products, grains and the like. However, in the middle and later stages of heat pump drying, the mass transfer coefficient between air and drying materials becomes small, longer drying time and more energy consumption are needed for removing the water, the change of the air state at the inlet and the outlet of the drying chamber is small, the cooling and dehumidifying capacity of the evaporator is affected, and the operation condition of the heat pump system becomes poor. In addition, in order to maintain the drying temperature stable, most of the electric energy input to the system is discharged in the form of heat energy, and the dehumidification efficiency is low.
The far infrared radiation technology realizes the correspondence between the radiation source spectrum and the absorption spectrum of a heated object, so that the inside and the outside of a product are uniformly heated, a heating medium is not needed, and the energy utilization rate and the product quality can be effectively improved while the drying time is shortened. However, when the single far infrared radiation is used for drying, the large heating rate can cause more moisture evaporated in the early stage of material drying, so that the moisture is difficult to remove in time, and the drying rate in the later stage is influenced.
Therefore, a far infrared combined heat pump drying device and a peanut drying method which can control drying in a segmented mode are urgently needed.
Disclosure of Invention
The invention provides a far infrared combined heat pump drying device and a peanut drying method, aiming at the technical problems of low safety, low dehumidification efficiency and non-uniform drying rate of single far infrared radiation drying of the conventional peanut airing drying, and the drying device and the peanut drying method are characterized in that multiple drying devices are arranged in the drying device through the combination of heat pump drying and far infrared radiation drying modes, the drying program is adjusted according to the change of the moisture content of the wet base of peanuts in a sectional drying mode, the drying speed is high, the energy consumption is low, the drying efficiency is greatly improved, and the safety of the dried peanuts is high.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the utility model provides a heat pump drying device is united to far infrared, includes box, heating unit, dehumidification unit and air current circulation unit, and the heating unit passes through the material drying rack-mount in the box, and the dehumidification unit is installed in one side of box and dehumidification unit and heating unit phase-match, and air current circulation unit passes heating unit and dehumidification unit and air current circulation unit end to end connection in proper order and constitutes circulation path.
Further, the dehumidification unit includes hydrofuge fan and air energy heat pump, the bottom at the dry frame of material is installed to the hydrofuge fan, the one side at the box is installed to the air energy heat pump, the air current circulation unit includes centrifugal fan and wind channel, centrifugal fan installs the top at the dry frame of material, the one end in wind channel is connected with centrifugal fan's air outlet, the other end in wind channel passes heating unit and the dry frame of material after divide into first minute wind channel and second minute wind channel, first minute wind channel is connected with centrifugal fan's air intake, the second minute wind channel passes the air energy heat pump and is connected with centrifugal fan's air intake.
Further, the heating unit includes ceramic heating plate and far infrared radiation board, and ceramic heating plate fixes in one side of the inside of box and ceramic heating plate is located the inside in wind channel, and far infrared radiation board level sets up on the material drying frame.
Further, ceramic heating plate is two at least, and ceramic heating plate is by last one side of evenly setting up in the inside of box under to, and far infrared radiation board is two at least, and far infrared radiation board is by last even installation on the dry frame of material under to.
Further, the material drying rack comprises a material rack, a screw rod and an adjusting nut, the material rack is fixed in the box body and located in the air duct, the screw rod is vertically arranged on two sides of the material rack respectively, the adjusting nut is installed on the screw rod, and two ends of the far infrared radiation plate are arranged on the adjusting nut.
Furthermore, the four stand columns of the material rack are provided with material trays supporting corner connectors, the material trays supporting corner connectors are provided with material trays, the material trays are the same as the far infrared radiation plates in quantity and are sequentially arranged below the far infrared radiation plates, and the bottom end of the material rack is provided with a weighing tray, and the upper end of the weighing tray is matched with the material trays.
Furthermore, the upper end of the box body is provided with an automatic control unit, the automatic control unit comprises a manual switch, an indicator lamp, a central controller, a weighing sensor, a temperature and humidity sensor, a far infrared radiation plate temperature monitoring sensor and a material temperature detection sensor, the manual switch and the indicator lamp are arranged at the upper end of the box body and are connected with the central controller, the central controller is respectively connected with a ceramic heating plate, the weighing sensor, an air energy heat pump, the temperature and humidity sensor, the far infrared radiation plate temperature monitoring sensor and the material temperature detection sensor, the weighing sensor is positioned at one side of a weighing tray and is connected with the weighing tray, the temperature and humidity sensor is positioned above the material rack and is arranged on the side wall of the air duct, the far infrared radiation plate temperature monitoring sensor is arranged on the far infrared radiation plate, the material temperature detection sensor is arranged on the material tray.
A peanut drying method, which uses a far infrared combined heat pump drying device to dry peanuts, comprises the following steps:
s1, placing the cleaned and sorted fresh peanuts into a material tray, and setting drying process parameters by using a central controller;
s2, after the drying process parameters are set, the ceramic heating plate, the far infrared radiation plate and the air energy heat pump are turned on through the manual switch, so that the temperature in the drying chamber is raised, the first stage of drying is carried out, and the moisture content of the wet peanut base is reduced;
s3, reducing the moisture content of the wet peanut base to a first threshold value, closing the far infrared radiation plate, keeping the ceramic heating plate and the air energy heat pump to dry the peanuts, and performing second-stage drying to continuously reduce the moisture content of the wet peanut base;
s4, reducing the moisture content of the wet peanut base to a second threshold value, closing the ceramic heating plate and the air energy heat pump, starting the far infrared radiation plate to dry the peanuts, carrying out the third-stage drying, and continuously reducing the moisture content of the wet peanut base;
and S5, reducing the moisture content of the wet peanut base to a third threshold value, closing the far infrared radiation plate, and finishing peanut drying.
Further, the drying time of the first stage in the step S2 is 30-45 min; in the step S3, the first threshold value is 40% -45%, and the drying time of the second stage is 4-5 h; in the step S4, the second threshold value is 20% -30%, and the actual drying time in the third stage is 6-8 h; the third threshold value in the step S5 is 8% -10%.
The invention has the beneficial effects that:
1. the far infrared combined heat pump drying device can solve the problems of low heating rate in the early stage of peanut drying and low efficiency in the later stage of drying in single heat pump drying, and can also solve the problems of high drying rate, high drying strength and difficult loss of peanut moisture in single far infrared drying. The far infrared combined heat pump drying device can recover sensible heat in waste steam and latent heat in the waste steam in the heat pump drying process, so that the energy consumption is greatly reduced, the heat pump drying efficiency is improved, meanwhile, the heat pump drying temperature is low, the heat pump drying device is suitable for drying heat-sensitive materials, and the advantages of high far infrared heating and drying speed and high production efficiency can be realized by adopting far infrared radiation heating and drying in the later drying stage. Therefore, the problems of low drying temperature and long drying time in the heat pump drying process, which are easy to cause microbial pollution, are solved, and the method is also suitable for drying and processing various heat-sensitive materials.
3. Compared with the existing hot air peanut drying method, the peanut drying method has the advantages that the drying time is shortened by 30-50%, and the energy consumption is reduced by 20-30%.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of a material drying rack in embodiment 1 of the present invention.
Fig. 3 is a schematic structural view of a far infrared radiation panel according to embodiment 1 of the present invention.
Fig. 4 is a schematic structural diagram of a tray in embodiment 1 of the present invention.
Fig. 5 is a flowchart of a working method in embodiment 2 of the present invention.
In the figure, 1-box, 2-dehumidifying fan, 3-air energy heat pump, 4-centrifugal fan, 5-air channel, 51-first air dividing channel, 52-second air dividing channel, 6-ceramic heating plate, 7-infrared radiation plate, 8-material rack, 9-screw, 10-adjusting nut, 11-material tray supporting corner code, 12-material tray, 13-weighing tray, 14-manual switch, 15-indicator light, 16-central controller, 17-weighing sensor, 18-temperature and humidity sensor, 19-far infrared radiation plate temperature monitoring sensor and 20-material temperature detecting sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that, in this embodiment, the far infrared combined heat pump drying device is described as drying peanuts, and in other embodiments of the present invention, the drying device may also be used to dry other flowers and fruits that need to be dried, as long as the purpose of the present invention is achieved.
Specifically, as shown in fig. 1, the dehumidifying unit includes a dehumidifying fan 2 and an air energy heat pump 3, the dehumidifying fan 2 is installed at the bottom of the material drying rack, the air energy heat pump 3 is installed at one side of the box body 1, the air flow circulating unit includes a centrifugal fan 4 and an air duct 5, the centrifugal fan 4 is installed above the material drying rack, one end of the air duct 5 is connected with an air outlet of the centrifugal fan 4, the other end of the air duct 5 passes through the heating unit and the material drying rack and then is divided into a first air dividing duct 51 and a second air dividing duct 52, the first air dividing duct 51 is connected with an air inlet of the centrifugal fan 4, and the second air dividing duct 52 passes through the air energy heat pump 3 and is connected with an air inlet of the centrifugal fan 4. In this embodiment, the heating unit heats the peanut in the material drying frame, the wet base moisture content of peanut reduces, moisture discharges, moisture discharge box 1 in the exhaust wet fan 2 with the air, centrifugal fan 4 gets into the material drying frame with the air current through wind channel 5, the air that contains moisture in the material drying frame is blown in air energy heat pump 3, the moisture evaporation to dryness in the air is heated to air energy heat pump 3, and the air after the heating in the air energy heat pump 3 blows in wind channel 5 through centrifugal fan 4 again and gets into the material drying frame and heat the dehumidification drying to the peanut.
It should be noted that, in the present embodiment, a condenser is disposed inside the air-source heat pump 3, and the condenser can condense water vapor in the air-source heat pump 3 into water and discharge the water, so as to further enhance the dehumidification and drying effect. In other embodiments of the present invention, other structures may be provided instead of the air-source heat pump 3 as long as the object of the present invention is achieved.
Further, as shown in fig. 1, the heating unit includes ceramic heating plate 6 and far infrared radiation board 7, ceramic heating plate 6 is fixed in one side of the inside of box 1 and ceramic heating plate 6 is located the inside of wind channel 5, far infrared radiation board 7 level sets up in the material drying frame, ceramic heating plate 6 provides the heat, and the air current in wind channel 5 brings the heat into the material drying frame and heats dehumidification drying to the peanut, and far infrared radiation board 7 carries out far infrared radiation drying to the peanut.
Specifically, as shown in fig. 1, in the present embodiment, the number of the ceramic heating plates 6 is 6, the heating plates 6 are uniformly arranged on one side of the inside of the box body 1 from top to bottom, the number of the far infrared radiation plates 7 is 7, and the far infrared radiation plates 7 are uniformly arranged on the material drying rack from top to bottom. In other embodiments of the present invention, the ceramic heating plate 6 and the far infrared radiation plates 7 may be provided in other numbers as long as the object of the present invention is achieved.
It is worth to be noted that, in this embodiment, the length of the ceramic heating plate 6 is 700mm, the width is sequentially increased by taking 50mm as a base point from top to bottom and taking 10mm as an interval, and the distance between the ceramic heating plates 6 is 160 mm. In other embodiments of the present invention, it is also possible to use heating plates made of other materials instead of the ceramic heating plate 6 or to use ceramic heating plates 6 of other sizes as needed as long as the object of the present invention is achieved.
It should be noted that, in the present embodiment, the far infrared radiation plate 7 is made of carbon fiber, and in other embodiments of the present invention, other materials such as carbon crystal material may be used to make the far infrared radiation plate 7 as long as the purpose of the present invention is achieved.
Further, as shown in fig. 1 and fig. 2, the material drying rack includes a material rack 8, a screw rod 9 and an adjusting nut 10, the material rack 8 is fixed in the box body 1, the material rack 8 is located in the air duct 5, the screw rod 9 is respectively vertically arranged on two sides of the material rack 8, the adjusting nut 10 is installed on the screw rod 9, two ends of the far infrared radiation plate 7 are arranged on the adjusting nut 10, four columns of the material rack 8 are provided with material tray supporting corner connectors 11, the material tray supporting corner connectors 11 are provided with material trays 12, the material trays 12 are the same as the far infrared radiation plates 7 in number and the material trays 12 are sequentially arranged below the far infrared radiation plates 7, the bottom end of the material rack 8 is provided with a weighing tray 13, and the upper end of the weighing tray 13 is matched with the material tray 12. When peanut drying and dehumidification are carried out, the position of the adjusting nut 10 on the screw rod 9 is adjusted as required, so that the distance between the material tray 12 and the far infrared radiation plate 7 is in a proper position, the far infrared radiation plate 7 carries out far infrared radiation drying on peanuts in the material tray 12, the weighing tray 13 measures the weight of the peanuts in the material tray 12, and the change value of the moisture content in the peanuts is obtained according to the calculation of the weight of the peanuts before drying.
Further, as shown in fig. 1, an automatic control unit is arranged at the upper end of the box body 1, the automatic control unit comprises a manual switch 14, an indicator lamp 15, a central controller 16, a weighing sensor 17, a temperature and humidity sensor 18, a far infrared radiation plate temperature monitoring sensor 19 and a material temperature detection sensor 20, the manual switch 14 and the indicator lamp 15 are arranged at the upper end of the box body 1, the manual switch 14 and the indicator lamp 15 are respectively connected with the central controller 16, as shown in fig. 3 and 4, the central controller is respectively connected with the ceramic heating plate 6, the weighing sensor 17, the temperature and humidity sensor 18, the far infrared radiation plate temperature monitoring sensor 19 and the material temperature detection sensor 20, the weighing sensor 17 is positioned at one side of the weighing tray 13, the weighing sensor 17 is connected with the weighing tray 13, the temperature and humidity sensor 18 is positioned above the material rest 8 and is installed on the side wall of the air duct 5, the far infrared radiation plate temperature monitoring sensor 19 is arranged on the far infrared radiation plate 7, and the material temperature detection sensor 20 is arranged on the material tray 12. The manual switch 14 is used for controlling the on-off of the ceramic heating plate 6, the far infrared heat radiation plate 7 and the air energy heat pump 3, the indicator lamp 15 is used for indicating the on-off of each manual switch 14, and the central controller 16 is used for receiving the change value of the peanut weight transmitted by the weighing sensor 17, the temperature and humidity change value around the material drying rack transmitted by the temperature and humidity sensor 18, the temperature change value around the far infrared radiation plate 7 transmitted by the far infrared radiation plate temperature monitoring sensor 19 and the temperature change value around the material tray 12 transmitted by the material temperature detecting sensor 20.
In the present embodiment, a temperature sensor is built in the ceramic heating plate 6, and the temperature sensor transmits a temperature change value of the ceramic heating plate 6 to the central controller. In other embodiments of the present invention, the adaptation may be made according to the material and structure of the ceramic heating plate 6 as long as the object of the present invention is achieved.
s1, placing the cleaned and sorted fresh peanuts into the material tray 12, and setting drying process parameters by using the central controller 16; specifically, fresh peanuts which are just harvested are washed by clean water, the moisture content of a wet base is 50%, sandy soil on peanut shells is mainly removed, then the peanuts are placed into a drying tray and placed in an external environment for 45 min, the moisture on the surfaces of the peanut shells is removed, then the peanuts are placed in a material tray 12, the peanut drying technological parameters are set on a touch screen of a central controller 16, and 3 drying stages are set, wherein in the first stage, a ceramic heating plate 6, a far infrared radiation plate 7 and an air energy heat pump 3 all work, the drying temperature of the ceramic heating plate, the far infrared radiation plate and the air energy heat pump 3 is set to be 40 ℃, and the air speed of a centrifugal fan 4 is set to be 1.5 m/s; in the second stage, the ceramic heating plate 6 and the air energy heat pump 3 work, the drying temperature is set to be 40 ℃, and the wind speed of the centrifugal fan 4 is set to be 2.0 m/s; in the third stage, the far infrared radiation plate 7 works, the drying temperature is set to be 50 ℃, and the wind speed of the centrifugal fan 4 is set to be 1.0 m/s.
S2, after the drying process parameters are set, the ceramic heating plate 6, the far infrared radiation plate 7 and the air energy heat pump 3 are started through the manual switch 14, so that the temperature in the drying chamber is increased, the first stage of drying is carried out, and the moisture content of the wet peanut base is reduced; specifically, the ceramic heating plate 6, the far infrared radiation plate 7 and the air energy heat pump 3 start to work, the temperature rises to 40 ℃, and the drying time is 30 min.
S3, reducing the moisture content of the wet peanut base to a first threshold value, closing the far infrared radiation plate 7, keeping the ceramic heating plate 6 and the air energy heat pump 3 for drying the peanuts, and carrying out second-stage drying, wherein the moisture content of the wet peanut base is continuously reduced; specifically, the change value of the moisture content of the wet peanut base is obtained through the weight change of the peanuts transmitted by the weighing sensor 17, when the moisture content of the wet peanut base is reduced to 40%, the far infrared radiation plate 7 is closed, the ceramic heating plate 6 and the air energy heat pump 3 continue to work, and the peanuts are dried for 5 hours.
S4, reducing the moisture content of the wet peanut base to a second threshold value, closing the ceramic heating plate 6 and the air energy heat pump 3, opening the far infrared radiation plate 7 to dry the peanuts, carrying out the third-stage drying, and continuously reducing the moisture content of the wet peanut base; specifically, when the moisture content of the peanut wet base is reduced to 20%, the ceramic heating plate 6 and the air energy heat pump 3 are closed, the far infrared radiation plate 7 is opened, and the peanuts are continuously dried for 6 hours.
S5, reducing the moisture content of the wet peanut base to a third threshold value, closing the far infrared radiation plate 7, and finishing peanut drying; specifically, when the moisture content of the peanut wet base is reduced to 10%, the drying device is closed, and the peanut drying is finished.
In the embodiment, a staged peanut heating, dehumidifying and drying process is used, the far infrared combined heat pump drying device can recover sensible heat in waste steam flowing in a circulating pipeline and latent heat in the waste steam in the heat pump drying process, so that energy consumption is greatly reduced, the heat pump drying efficiency is improved, meanwhile, the heat pump drying temperature is low, the heat pump drying device is suitable for drying heat-sensitive materials, and the far infrared radiation heating and drying device can be used for achieving the advantages of high far infrared heating and drying speed and high production efficiency in the later drying period. Therefore, the problems of low drying temperature and long drying time in the heat pump drying process, which are easy to cause microbial pollution, are solved, and the method is also suitable for drying and processing various heat-sensitive materials.
It should be noted that in other embodiments of the present invention, the data may be adapted according to the initial moisture content of the wet peanut base and the drying time, as long as the object of the present invention is achieved.
Other steps in this embodiment are the same as those in embodiment 2, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The utility model provides a heat pump drying device is united to far infrared, its characterized in that includes box (1), heating unit, dehumidification unit and air current circulation unit, the heating unit passes through the material drying rack-mount in box (1), the dehumidification unit is installed in one side of box (1) and dehumidification unit and heating unit phase-match, the air current circulation unit passes heating unit and dehumidification unit and air current circulation unit end to end connection in proper order and constitutes circulation path.
2. A far infrared combined heat pump drying device as claimed in claim 1, characterized in that, the dehumidifying unit comprises a dehumidifying fan (2) and an air energy heat pump (3), the dehumidifying fan (2) is arranged at the bottom end of the material drying rack, the air energy heat pump (3) is arranged at one side of the box body (1), the airflow circulating unit comprises a centrifugal fan (4) and an air duct (5), the centrifugal fan (4) is arranged above the material drying rack, one end of the air duct (5) is connected with an air outlet of the centrifugal fan (4), the other end of the air duct (5) passes through the heating unit and the material drying rack and then is divided into a first air dividing duct (51) and a second air dividing duct (52), the first air dividing duct (51) is connected with an air inlet of the centrifugal fan (4), the second air dividing duct (52) penetrates through the air energy heat pump (3) and is connected with an air inlet of the centrifugal fan (4).
3. The far infrared combined heat pump drying device according to claim 2, wherein the heating unit comprises a ceramic heating plate (6) and a far infrared radiation plate (7), the ceramic heating plate (6) is fixed on one side of the inside of the box body (1) and the ceramic heating plate (6) is located inside the air duct (5), and the far infrared radiation plate (7) is horizontally arranged on the material drying rack.
4. A far infrared combined heat pump drying device as claimed in claim 3, characterized in that the number of the ceramic heating plates (6) is at least two, the ceramic heating plates (6) are uniformly arranged on one side of the inside of the box body (1) from top to bottom, the number of the far infrared radiation plates (7) is at least two, and the far infrared radiation plates (7) are uniformly arranged on the material drying rack from top to bottom.
5. The far infrared combined heat pump drying device according to claim 3 or 4, wherein the material drying rack comprises a material rack (8), a screw rod (9) and an adjusting nut (10), the material rack (8) is fixed in the box body (1), the material rack (8) is located in the air duct (5), the screw rods (9) are respectively vertically arranged on two sides of the material rack (8), the adjusting nut (10) is installed on the screw rod (9), and two ends of the far infrared radiation plate (7) are arranged on the adjusting nut (10).
6. The far infrared combined heat pump drying device according to claim 5, wherein the four columns of the material rack (8) are provided with material tray supporting corner connectors (11), the material tray supporting corner connectors (11) are provided with material trays (12), the number of the material trays (12) and the number of the far infrared radiation plates (7) are the same, the material trays (12) are sequentially arranged below the far infrared radiation plates (7), the bottom end of the material rack (8) is provided with a weighing tray (13), and the upper end of the weighing tray (13) is matched with the material trays (12).
7. The far infrared combined heat pump drying device according to any one of claims 1 to 4 and 6, wherein an automatic control unit is arranged at the upper end of the box body (1), the automatic control unit comprises a manual switch (14), an indicator lamp (15), a central controller (16), a weighing sensor (17), a temperature and humidity sensor (18), a far infrared radiation plate temperature monitoring sensor (19) and a material temperature detection sensor (20), the manual switch (14) and the indicator lamp (15) are arranged at the upper end of the box body (1), the manual switch (14) and the indicator lamp (15) are connected with the central controller (16), the central controller is respectively connected with the ceramic heating plate (6), the weighing sensor (17), the air energy heat pump (3), the temperature and humidity sensor (18), the far infrared radiation plate temperature monitoring sensor (19) and the material temperature detection sensor (20), weighing sensor (17) are located one side of weighing tray (13) and weighing sensor (17) and are connected with weighing tray (13), temperature and humidity sensor (18) are located the top of work or material rest (8) and temperature and humidity sensor (18) install on the lateral wall in wind channel (5), far infrared radiant panel temperature monitoring sensor (19) set up on far infrared radiant panel (7), material temperature detection sensor (20) set up on charging tray (12).
8. A peanut drying method, which uses far infrared combined heat pump drying device to dry peanuts, is characterized by comprising the following steps:
s1, placing the cleaned and sorted fresh peanuts into a tray (12), and setting drying process parameters by using a central controller (16);
s2, after the drying process parameters are set, the ceramic heating plate (6), the far infrared radiation plate (7) and the air energy heat pump (3) are turned on through the manual switch (14), so that the temperature in the drying chamber is raised, the first stage of drying is carried out, and the moisture content of the wet peanut base is reduced;
s3, reducing the moisture content of the wet peanut base to a first threshold value, closing the far infrared radiation plate (7), keeping the ceramic heating plate (6) and the air energy heat pump (3) for drying the peanuts, and carrying out second-stage drying, wherein the moisture content of the wet peanut base is continuously reduced;
s4, reducing the moisture content of the wet peanut base to a second threshold value, closing the ceramic heating plate (6) and the air energy heat pump (3), starting the far infrared radiation plate (7) to dry the peanuts, carrying out the third-stage drying, and continuously reducing the moisture content of the wet peanut base;
s5, reducing the moisture content of the wet peanut base to a third threshold value, closing the far infrared radiation plate (7), and finishing peanut drying.
9. The peanut drying method as claimed in claim 8, wherein the drying time of the first stage in the step S2 is 30-45 min; the first threshold value in the step S3 is 40% -45%, and the drying time of the second stage is 4-5 h; the second threshold value in the step S4 is 20% -30%, and the actual drying time in the third stage is 6-8 h; the third threshold value in the step S5 is 8% -10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110961452.6A CN113498872A (en) | 2021-08-20 | 2021-08-20 | Far infrared combined heat pump drying device and peanut drying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110961452.6A CN113498872A (en) | 2021-08-20 | 2021-08-20 | Far infrared combined heat pump drying device and peanut drying method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112772808A (en) * | 2021-01-25 | 2021-05-11 | 昆明生物制造研究院有限公司 | Lucid ganoderma and blueberry compound fermented beverage and preparation method thereof |
| EP4206144A1 (en) * | 2021-12-30 | 2023-07-05 | Jan Wicherski | A method for obtaining clean drinking water from dewatered biological products and a device for dewatering such products |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112772808A (en) * | 2021-01-25 | 2021-05-11 | 昆明生物制造研究院有限公司 | Lucid ganoderma and blueberry compound fermented beverage and preparation method thereof |
| EP4206144A1 (en) * | 2021-12-30 | 2023-07-05 | Jan Wicherski | A method for obtaining clean drinking water from dewatered biological products and a device for dewatering such products |
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