Wind, light and agriculture integrated natural energy utilization system

Abstract

The invention discloses a wind, light and agriculture integrated natural energy utilization system which comprises a drying bin, and a material drying mechanism is arranged in the drying bin. An upper-layer photovoltaic photo-thermal air conveying channel is arranged at the top of the drying bin and comprises a photovoltaic power generation section and a photo-thermal heat collection section, a fresh air inlet is formed in the end, corresponding to the photovoltaic power generation section, of the upper-layer photovoltaic photo-thermal air conveying channel, and a fresh air outlet is formed in the end, corresponding to the photo-thermal heat collection section, of the upper-layer photovoltaic photo-thermal air conveying channel. A hot air inlet and a discharging port are formed in the end, corresponding to the photo-thermal heat collection section of the upper-layer photovoltaic photo-thermal air conveying channel, of the drying bin, a hot air outlet and a feeding port are formed in the end, corresponding to the photovoltaic power generation section, of the drying bin, and a fresh air outlet of the upper-layer photovoltaic photo-thermal air conveying channel communicates with the hot air inlet of the drying bin. A hot air outlet of the drying bin is connected with a chimney through an air collecting pipeline. Wind power, photoelectricity, photo-thermal, chimney power generation, chimney convection and grain drying are integrated, the utilization rate of natural energy is increased, and the original defect that the utilization rate of grain dried by drying equipment is low is overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of agriculture, and specifically relates to a wind-solar-agriculture integrated natural energy utilization system. Background Art

[0002] Food security is a major national strategy. The last mile of a good harvest is the critical period with the greatest risk of a good harvest. A common phenomenon in recent years is drying grains on the road, which not only seriously affects traffic safety, but also the toxic substances in the asphalt of the road are in "close" contact with the grains, harming human health. What's even scarier is that most of the grain harvesting seasons are rainy days, and the grains are prone to mildew and germination. The harm of mildewed grains to humans and livestock is greater than that of agricultural residues. Through investigation, it is known that the mildew of corn mainly occurs during the drying period after being broken off from the field and before threshing, rather than after threshing. Since the corn is relatively tender after being broken off, it is easy to break during direct threshing. Therefore, it generally needs to be dried for 3 - 4 days before threshing. Before that, the tender corn cobs are prone to mildew in rainy days or when piled up with poor ventilation.

[0003] For grain drying, especially corn dryers, the vast majority are for drying corn kernels, lacking corn cob drying equipment. Moreover, grain drying is seasonal, the utilization rate of drying equipment is low, the added value of grains is low, and the cost investment in drying equipment is too high. Therefore, there is a lack of research and development and market capital promotion in this regard.

[0004] Therefore, in view of the above problems, it is urgent to develop a wind-solar-agriculture integrated natural energy utilization system to make up for the original defect of the low utilization rate of drying equipment. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art and provide a wind-solar-agriculture integrated natural energy utilization system, which is a natural energy utilization system integrating wind power, photoelectricity, solar heat, chimney power generation, chimney convection and grain drying, with "multiple functions in one machine", effectively improving the utilization rate of natural energy and making up for the original defect of the low utilization rate of a single drying equipment for drying grains.

[0006] The technical solution of the present invention is as follows:

[0007] The integrated wind-solar-agriculture natural energy utilization system includes a number of drying bins, and a material drying mechanism is arranged inside the drying bins; an upper-layer photovoltaic-thermal air duct is arranged on the top of the drying bins. The upper-layer photovoltaic-thermal air duct includes a photovoltaic power generation section and a solar thermal collection section. One end of the upper-layer photovoltaic-thermal air duct corresponding to the photovoltaic power generation section is provided with a fresh air inlet, and one end corresponding to the solar thermal collection section is provided with a fresh air outlet. One end of the drying bin corresponding to the solar thermal collection section of the upper-layer photovoltaic-thermal air duct is provided with a hot air inlet and a discharge port, and one end corresponding to the photovoltaic power generation section is provided with a hot air outlet and a feed port. The fresh air outlet of the upper-layer photovoltaic-thermal air duct is communicated with the hot air inlet of the drying bin; the hot air outlet of the drying bin is connected to a chimney through a wind collecting pipe.

[0008] Preferably, the material drying mechanism includes several layers of mesh belt conveyors. The feed end and the discharge end of the mesh belt conveyor are respectively located at the feed port and the discharge port of the drying bin, and a feed hopper is arranged at the feed end of the mesh belt conveyor.

[0009] Preferably, a lower-layer photovoltaic-thermal air duct is arranged on one side of the drying bin, and the structure of the lower-layer photovoltaic-thermal air duct is the same as that of the upper-layer photovoltaic-thermal air duct.

[0010] Preferably, both the upper-layer photovoltaic-thermal air duct and the lower-layer photovoltaic-thermal air duct are in the shape of a right triangle. Its photovoltaic power generation section includes photovoltaic glass arranged on the inclined plane, and the solar thermal collection section includes hollow or vacuum low-iron high-transmittance toughened glass arranged on the inclined plane.

[0011] Preferably, heat-absorbing coatings are arranged on the inner walls of the vertical walls of the upper-layer photovoltaic-thermal air duct and the lower-layer photovoltaic-thermal air duct.

[0012] Preferably, several wind turbines are arranged on the top of the upper-layer photovoltaic-thermal air duct.

[0013] Preferably, a wind power generation device is arranged on the chimney.

[0014] Preferably, several fresh air windows are arranged on the vertical wall of the photovoltaic power generation section of the upper-layer photovoltaic-thermal air duct.

[0015] Preferably, air guiding plates are arranged on the inner wall of the drying bin to guide the hot air to the middle of the drying bin; a heat-reflective coating is applied on the inner wall of the drying bin.

[0016] Preferably, the hot air outlet of the drying bin is connected to a complementary heat source through a pipe, and the air outlet of the complementary heat source is communicated with the hot air inlet of the drying bin through a pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a natural energy utilization system integrating wind power, photovoltaic power, solar thermal power, chimney power generation, chimney convection and grain drying. It "serves multiple purposes with one machine", effectively improving the utilization rate of natural energy and making up for the original defect of low utilization rate of a single drying equipment for drying grain. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is the left view of the drying bin of the present invention.

[0021] Figure 2 It is the right view of the drying bin of the present invention.

[0022] Figure 3 It is the rear view of the drying bin of the present invention.

[0023] Figure 4 It is the connection schematic diagram of the drying bin and the air collecting duct of the present invention.

[0024] Figure 5 It is the connection schematic diagram of the drying bin and the complementary heat source of the present invention.

[0025] Figure 6 It is the schematic diagram of the connection of the drying bin and the chimney through the air collecting duct of the present invention.

[0026] Figure 7 It is the structural schematic diagram of the multi-layer mesh belt conveyor of the present invention.

[0027] In the figure, 1. drying bin; 101. feed inlet; 102. discharge outlet; 103. hot air outlet; 104. heat reflection coating; 2. material drying mechanism; 201. mesh belt conveyor; 202. feed hopper; 203. deflector; 204. thresher; 301. upper layer photovoltaic and solar thermal air duct; 302. lower layer photovoltaic and solar thermal air duct; 303. photovoltaic power generation section; 304. solar thermal collection section; 305. fresh air inlet; 4. air collecting duct; 5. chimney; 501. cable; 6. vertical wall; 6 and 01. heat absorption coating; 7. fresh air window; 8. air guide plate; 9. complementary heat source; 10. turbine generator; 11. vertical axis wind turbine. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment 1

[0030] As Figure 1-2 shown, this embodiment provides a wind-solar-agriculture integrated natural energy utilization system, including a number of drying bins 1. The drying bin 1 is made of light steel structure, with a steel consumption of 50 - 70 kg / m 2 , and in this embodiment, it is 60 kg / m 2 . Generally, it is a long strip structure in the east-west direction, or it can also be in the north-south direction. The drying bin 1 has a specification of 400 m × 3 m × 3 m, and is designed with a wind resistance load ≤ 41.5 m / s, a seismic intensity fortification of 9 degrees, and a snow load resistance ≥ 2.5 kN / m 2 . A material drying mechanism 2 is arranged in the drying bin 1 for drying corn cobs or large-shaped materials.

[0031] Specifically, as Figure 7 shown, the material drying mechanism 2 includes a three-layer mesh belt conveyor 201. The distance between layers is 0.6 m, and a number of racks are arranged at the bottom of each layer of the mesh belt conveyor 201 to play a supporting role, and the distance between the racks is 10 m. The feeding end and the discharging end of the mesh belt conveyor 201 are respectively located at the feeding port 101 and the discharging port 102 of the drying bin 1. A feeding hopper 202 is arranged at the feeding end of the mesh belt conveyor 201, and a hoist is arranged at the feeding hopper 202. The hoist conveys the corn cobs to be dried into the feeding hopper 202. A deflector plate 203 is arranged at the discharging port 102, and a thresher 204 is arranged below the deflector plate 203. The corn cobs are dried during the conveying process on the mesh belt conveyor 201, and after drying, they fall into the thresher 204 along the deflector plate 203 for threshing. The mesh belt is made of stainless steel sus304, with a pore diameter of φ6 mm, a mesh belt width of 2.8 m, and each meter of the mesh belt can carry 500 kg of corn cobs, and the transmission vehicle speed is 3 m / min.

[0032] The material drying mechanism 2 can also be a drying vehicle, which can be a rail-type or a trackless universal wheel-type drying vehicle. The main body of the drying vehicle is a ventilated structure enclosed by metal or non-metal plastic mesh. For example, it is enclosed with a steel mesh material made of SUS304 with a diameter of φ8 mm, and the angle steel with a size of 60 mm × 60 mm is used as the skeleton. The drying vehicle has a length × width × height = 4 m × 2.8 m × 2.7 m, and the loading capacity is about 30 m 3, about 24 tons of fresh corn can be loaded on a single drying truck. The solenoid valve can be used to automatically control the switch at the discharge port 102 at the bottom of the drying truck for discharging.

[0033] As Figure 1-3 shown, an upper-layer photovoltaic and solar-thermal air duct 301 is provided at the top of the drying bin 1, and a lower-layer photovoltaic and solar-thermal air duct 302 is provided on one side of the drying bin 1. The upper-layer photovoltaic and solar-thermal air duct 301 and the lower-layer photovoltaic and solar-thermal air duct 302 include a 160m photovoltaic power generation section 303 and a 240m solar-thermal collection section 304. Among them, both the upper-layer photovoltaic and solar-thermal air duct 301 and the lower-layer photovoltaic and solar-thermal air duct 302 are in the shape of a right triangle, so that the drying bin 1, the upper-layer photovoltaic and solar-thermal air duct 301 and the lower-layer photovoltaic and solar-thermal air duct 302 as a whole form an isosceles right triangle, and the height of this whole is 6m. Its photovoltaic power generation section 303 includes photovoltaic glass provided on the inclined surface, such as monocrystalline silicon photovoltaic glass or cadmium telluride photovoltaic glass; the solar-thermal collection section 304 includes hollow or vacuum low-iron high-transmittance toughened glass provided on the inclined surface, such as 5+12+5 ultra-white cloth pattern toughened glass with a light transmittance ≥89%. The vertical wall 6 of the upper-layer photovoltaic and solar-thermal air duct 301 and the lower-layer photovoltaic and solar-thermal air duct 302 is composed of 0.5mm color steel + 75mm Pu + 0.5mm color steel composite board, and a vanadium-titanium ceramic plate heat absorption coating 601 is provided on the inner side of the vertical wall 6 with an absorption rate ≥92% and an emissivity ≤8%.

[0034] As Figure 3-4 shown, a fresh air inlet 305 is provided at one end of the upper-layer photovoltaic and solar-thermal air duct 301 and the lower-layer photovoltaic and solar-thermal air duct 302 corresponding to the photovoltaic power generation section 303, and a fresh air outlet is provided at one end corresponding to the solar-thermal collection section 304. A hot air inlet and a discharge port 102 are provided at one end of the drying bin 1 corresponding to the solar-thermal collection section 304 of the upper-layer photovoltaic and solar-thermal air duct 301, and a hot air outlet 103 and a feed port 101 are provided at one end corresponding to the photovoltaic power generation section 303. The fresh air outlet of the upper-layer photovoltaic and solar-thermal air duct 301 is communicated with the hot air inlet of the drying bin 1.

[0035] Fresh outdoor air enters the upper photovoltaic-thermal air duct 301 and the lower photovoltaic-thermal air duct 302 through the fresh air inlet 305. First, it passes through the photovoltaic power generation section 303, where the fresh air cools the photovoltaic glass, achieving higher power generation efficiency while preheating the fresh air to realize combined heat and power generation. The preheated fresh air then passes through the solar thermal collector section 304. The sunlight passes through the hollow or vacuum low-iron high-transmittance tempered glass and irradiates the heat-absorbing coating 601 on the vertical wall 6. After the heat-absorbing coating 601 absorbs the heat of the sunlight, it heats the passing fresh air, thereby generating hot air. The hot air then enters the drying bin 1 through the hot air inlet and moves in the opposite direction to the conveying direction of the corn cobs to dry the corn cobs. In order to ensure the relative movement between the hot air and the corn cobs, an induced draft fan can be installed in the drying bin 1 to guide the hot air to move in the opposite direction to the corn cobs. In addition, a fresh air fan can be set at the discharge port 102 of the drying bin 1 to blow fresh air on the dried material to cool it down.

[0036] Among them, as Figure 1-2 shown, a number of inclined air guide plates 8 are provided on the three inner walls of the drying bin 1, so as to direct the hot air to the material drying mechanism 2 at the middle position of the drying bin 1 to fully utilize the hot air to dry the material. In addition, as Figure 1-2 shown, a heat-reflective coating 104 is coated on the inner wall of the drying bin 1 to reflect the heat in the drying bin 1 to the material drying mechanism 2 to reduce heat waste.

[0037] As Figure 6 shown, multiple units composed of the drying bin 1, the upper photovoltaic-thermal air duct 301 and the lower photovoltaic-thermal air duct 302 can be provided, and they are respectively connected to a chimney 5 through a wind collecting pipe 4, and the connection between the drying bin 1 and the chimney 5 is realized through the wind collecting pipe 4; the units can be connected in series, in parallel or in series-parallel.

[0038] Embodiment 2

[0039] On the basis of Embodiment 1, as Figure 1-2 shown, a number of vertical axis wind turbines 11 are provided on the top of the upper photovoltaic-thermal air duct 301, with a single unit power of 3 kw, a machine spacing of 4 m, and a total of 100 units installed, and the total power generation is 300 kw.

[0040] Embodiment 3

[0041] On the basis of Embodiment 1, as Figure 6As shown, the height of the chimney 5 is between 100 - 1000 m, the DN diameter is between 1 - 10 m, its material is metal material, it is composed of multiple sections connected by flanges, and is provided with multiple guy wires 501. A wind power generation device is provided on the chimney 5. The wind power generation device includes a turbo generator 10 installed inside the chimney 5 and multiple layers of wind power generation sets at the external flange of the chimney 5. Each layer of wind power generation set includes multiple vertical axis wind turbines 11.

[0042] In order to better generate a large temperature difference up and down inside the chimney 5 to generate suction for the hot air in the drying bin 1, so that the hot air in the drying bin 1 can smoothly enter the chimney 5, the chimney 5 can be successively coated with black, blue, yellow (gray), white and other coatings from bottom to top. The colors change from dark to light, and the heat absorption of sunlight changes from strong to weak to reflection.

[0043] For example, the height of the chimney 5 can be designed to be 300 m, the bottom diameter of the chimney 5 is 5 m, the top diameter is 3.5 m, the material is high-strength carbon steel Q690D or stainless steel SUS304; the wall thickness has four types, which are 30 mm, 25 mm, 20 mm, and 10 mm from bottom to top respectively. The 300 - m chimney 5 is composed of 12 sections, which are 30 m×4, 25 m×3, 20 m×3, and 10 m×2 from bottom to top respectively. The colors of the chimney 5 from bottom to top are 120 m of dark blue, 80 m of gray, 80 m of cream yellow, and 20 m of white, a total of four colors. Considering environmental beauty, black is not used. Some heat-absorbing nano metals and compound materials such as titanium nitride oxide, vanadium-titanium powder, chromium nickel oxide, etc. can also be added to the dark blue paint; nano barium and other reflective materials can be added to the white paint to increase the heat absorption performance of the dark blue part and the heat reflection performance of the white part, and increase the temperature difference up and down inside the chimney 5. The color paint can use fluorocarbon resin weather-resistant paint, with a service life ≥ 30 years. 4 - 6 pairs of guy wires 501 are symmetrically arranged on the 12th section of the chimney 5.

[0044] Vertical axis wind turbines 11 are installed at the joint flange part of the chimney 5. 15 vertical axis wind turbines 111 with a power generation capacity of 4 kW are installed in each of the 1 - 4 sections, 10 in each of the 5 - 7 sections, 8 in each of the 8 - 10 sections, 3 in the 11th section, and no vertical axis wind turbines 11 are installed in the 12th section. A total of 117 vertical axis wind turbines 111 with a power generation capacity of 4 kW are installed, and the installed power generation capacity is 468 kW.

[0045] At an ambient temperature of 30 °C and at 15:00 in the afternoon, the inner surface temperature of the chimney 5 in the solar radiation area at a height of 100 m in the dark blue part is measured to be 85 °C, the inner surface temperature of the chimney 5 in the cream yellow part at a height of 230 m is 56 °C, and the inner surface temperature of the chimney 5 in the white part at a height of 290 m is 35 °C. Therefore, the temperature difference up and down the inner surface of the chimney 5 is 50 °C.

[0046] On a sunny day in winter in the north at -15°C, at 11:00 am, the air flow velocity of chimney 5 was measured to be 19 m / s; on a sunny day in summer at 36°C, at 5:00 pm, the air flow velocity of chimney 5 was measured to be 30.5 m / s; during the corn drying season in late October, with an air temperature of 28°C, at 11:00 am, the air flow velocity of chimney 5 during drying was measured to be 16 m / s.

[0047] Three maglev wind turbines are installed at positions 12 m, 50 m, and 130 m above the ground of chimney 5, with power generation capacities of 480 kW, 320 kW, and 180 kW respectively.

[0048] Example 4

[0049] On the basis of Example 1, as Figure 3 shown, 4 - 6 fresh air windows 7 with a size of 0.15 m × 1.2 m are arranged on the vertical wall 6 of the photovoltaic power generation section 303 of the upper - layer photovoltaic - thermal air duct 301. The photovoltaic - thermal cogeneration of the present invention utilizes multiple - point window opening to introduce fresh air to cool the photovoltaic glass, avoiding the influence of too high temperature of the photovoltaic glass on the power generation efficiency. And while obtaining higher power generation efficiency, the fresh air is heated to achieve cogeneration.

[0050] Example 5

[0051] On the basis of Example 1, as Figure 5 shown, the hot - air outlet 103 of the drying chamber 1 is connected with a complementary heat source 9 through a pipeline. The complementary heat source 9 can be one or more of a solar collector, an air - source heat pump, and a solid energy storage (heat) module E3 in series or in parallel. The air outlet of the complementary heat source 9 is communicated with the hot - air inlet of the drying chamber 1 through a pipeline. The complementary heat source 9 re - collects the sensible heat discharged from the hot - air outlet 103 of the drying chamber 1, increases the COP of the heat pump, and then returns the hot air to the hot - air inlet of the drying chamber 1 to continue drying the materials. This heat - recovery mode only circulates between the drying chamber 1 and the complementary heat source 9, and the hot air no longer enters chimney 5 for power generation.

[0052] For example, in the drying season in October, with the ambient air temperature at night being 5°C and the COP of the air - source heat pump being 2, while the inlet temperature of the humid hot air with sensible heat recovery is 36°C, the COP of the air - source heat pump can reach 4.2, and the energy - saving effect is remarkable.

[0053] When the present invention is used during the material drying season, it can be used as a drying device; while at other times, it can be used as a power generation plant. Therefore, the present invention integrates photovoltaic - thermal cogeneration, solar - heat collection, wind power generation, and chimney 5 power generation, providing a demonstration for the complementary development of future agriculture and energy.

[0054] Although the present invention has been described in detail by reference to the accompanying drawings and in conjunction with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and all such modifications or substitutions should fall within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A wind-solar-agricultural integrated natural energy utilization system, characterized in that It includes several drying bins (1), and a material drying mechanism (2) is arranged inside the drying bin (1); an upper-layer photovoltaic and solar-thermal air duct (301) is arranged at the top of the drying bin (1). The upper-layer photovoltaic and solar-thermal air duct (301) includes a photovoltaic power generation section (303) and a solar-thermal heat collection section (304). One end of the upper-layer photovoltaic and solar-thermal air duct (301) corresponding to the photovoltaic power generation section (303) is provided with a fresh air inlet (305), and one end corresponding to the solar-thermal heat collection section (304) is provided with a fresh air outlet. One end of the drying bin (1) corresponding to the solar-thermal heat collection section (304) of the upper-layer photovoltaic and solar-thermal air duct (301) is provided with a hot air inlet and a discharge port (102), and one end corresponding to the photovoltaic power generation section (303) is provided with a hot air outlet (103) and a feed port (101). The fresh air outlet of the upper-layer photovoltaic and solar-thermal air duct (301) is communicated with the hot air inlet of the drying bin (1); the hot air outlet (103) of the drying bin (1) is connected to a chimney (5) through a wind collecting pipe (4).

2. The integrated wind-solar-agriculture natural energy utilization system according to claim 1, wherein The material drying mechanism (2) includes several layers of mesh belt conveyors (201). The feed end and the discharge end of the mesh belt conveyor (201) are respectively located at the feed port (101) and the discharge port (102) of the drying bin (1), and a feed hopper (202) is arranged at the feed end of the mesh belt conveyor (201).

3. The integrated wind-solar-agriculture natural energy utilization system according to claim 1, characterized in that A lower-layer photovoltaic and solar-thermal air duct (302) is arranged on one side of the drying bin (1), and the structure of the lower-layer photovoltaic and solar-thermal air duct (302) is the same as that of the upper-layer photovoltaic and solar-thermal air duct (301).

4. The integrated wind-solar-agriculture natural energy utilization system according to claim 3, characterized in that, Both the upper-layer photovoltaic and solar-thermal air duct (301) and the lower-layer photovoltaic and solar-thermal air duct (302) are in the shape of a right triangle. Its photovoltaic power generation section (303) includes photovoltaic glass arranged on the inclined plane, and the solar-thermal heat collection section (304) includes hollow or vacuum low-iron high-transmittance tempered glass arranged on the inclined plane.

5. The integrated wind-solar-agriculture natural energy utilization system according to claim 4, characterized in that, An endothermic coating (601) is arranged on the inner wall of the vertical wall (6) of the upper-layer photovoltaic and solar-thermal air duct (301) and the lower-layer photovoltaic and solar-thermal air duct (302).

6. The integrated wind-solar-agriculture natural energy utilization system according to claim 1, characterized in that Several wind turbines are arranged on the top of the upper-layer photovoltaic and solar-thermal air duct (301).

7. The integrated wind-solar-agriculture natural energy utilization system according to claim 1, characterized in that A wind power generation device is arranged on the chimney (5).

8. The integrated wind-solar-agriculture natural energy utilization system according to claim 1, characterized in that, Several fresh air windows (7) are arranged on the vertical wall (6) of the photovoltaic power generation section (303) of the upper-layer photovoltaic and solar-thermal air duct (301).

9. The integrated wind-solar-agriculture natural energy utilization system according to claim 1, characterized in that A wind guide plate (8) is arranged on the inner wall of the drying bin (1) to guide the hot air to the middle of the drying bin (1); a heat reflection coating (104) is applied on the inner wall of the drying bin (1).

10. The integrated wind-solar-agriculture natural energy utilization system according to claim 1, characterized in that The hot air outlet (103) of the drying bin (1) is connected to a complementary heat source (9) through a pipe, and the air outlet of the complementary heat source (9) is communicated with the hot air inlet of the drying bin (1) through a pipe.

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