Wind, light and agriculture integrated natural energy utilization system

Abstract

The utility model 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 drying equipment is low in grain drying utilization rate is overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of agriculture, and in particular to a wind-solar-agriculture integrated natural energy utilization system. Background Art

[0002] Food security is a national priority. The last mile of a grain harvest is the most critical time period for a grain harvest. In recent years, a common phenomenon is drying grain 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 grain, which is harmful to human health. What is even more frightening is that most of the grain harvest season is rainy, and grain is prone to mold and sprout, and moldy grain is more harmful to humans and livestock than pesticide residues. After investigation, it was learned that the mildew of corn mainly occurs during the drying period after it is broken off from the field and before threshing, rather than after threshing. Since corn is relatively tender after being broken off, it is easy to break if it is threshed directly, so it is generally threshed after 3-4 days of drying. Before that, the tender corn cobs are prone to mildew on rainy days or when they are piled up with poor ventilation.

[0003] Grain drying, especially corn drying machines, are mostly used to dry corn kernels, and there is a lack of corn cob drying equipment. In addition, grain drying is seasonal, the utilization rate of drying equipment is low, the added value of grain is low, and the cost of drying equipment is too high, so there is a lack of research and development and market capital promotion in this area.

[0004] Therefore, in response to the above problems, it is urgent to develop a wind-solar-agricultural integrated natural energy utilization system to make up for the original defect of low utilization rate of drying equipment. Utility Model Content

[0005] The technical problem to be solved by the utility model is: to overcome the shortcomings of the existing technology and provide a wind-solar-agricultural integrated natural energy utilization system, which is a natural energy utilization system that integrates wind power, photovoltaics, solar heat, chimney power generation, chimney convection and grain drying, "one machine with multiple uses", effectively improving the utilization rate of natural energy and making up for the original defect of low utilization rate of grain drying by single drying equipment.

[0006] The technical solution of the utility model is:

[0007] The wind-solar-agriculture integrated natural energy utilization system comprises a plurality of drying bins, wherein a material drying mechanism is arranged in the drying bin; an upper photovoltaic-thermal air duct is arranged on the top of the drying bin, and the upper photovoltaic-thermal air duct comprises a photovoltaic power generation section and a photovoltaic heat collection section; a fresh air inlet is arranged at one end of the upper photovoltaic-thermal air duct corresponding to the photovoltaic power generation section, and a fresh air outlet is arranged at one end corresponding to the photovoltaic heat collection section; a hot air inlet and a material discharge port are arranged at one end of the drying bin corresponding to the photovoltaic heat collection section of the upper photovoltaic-thermal air duct, and a hot air outlet and a material feed port are arranged at one end corresponding to the photovoltaic power generation section; the fresh air outlet of the upper photovoltaic-thermal air duct is connected to the hot air inlet of the drying bin; and the hot air outlet of the drying bin is connected to the chimney through an air collecting duct.

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

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

[0010] Preferably, the upper photovoltaic thermal air duct and the lower photovoltaic thermal air duct are both right-angled triangles, and their photovoltaic power generation section includes photovoltaic glass arranged on the inclined surface, and the thermal collection section includes hollow or vacuum low-iron high-transmittance tempered glass arranged on the inclined surface.

[0011] Preferably, a heat-absorbing coating is provided on the inner walls of the vertical walls of the upper photovoltaic-thermal air duct and the lower photovoltaic-thermal air duct.

[0012] Preferably, a plurality of wind turbines are arranged on the top of the upper photovoltaic thermal air transmission duct.

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

[0014] Preferably, a plurality of fresh air windows are provided on the vertical wall of the photovoltaic power generation section of the upper photovoltaic thermal air transmission duct.

[0015] Preferably, an air guide plate is provided on the inner wall of the drying chamber to guide the hot air to the middle of the drying chamber; and a heat reflective coating is coated on the inner wall of the drying chamber.

[0016] Preferably, the hot air outlet of the drying chamber is connected to a complementary heat source via a pipeline, and the air outlet of the complementary heat source is connected to the hot air inlet of the drying chamber via a pipeline.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model provides a natural energy utilization system which integrates wind power, photovoltaic power, solar heat, chimney power generation, chimney convection and grain drying. It has "one machine with multiple uses" and effectively improves the utilization rate of natural energy, making up for the original defect of low utilization rate of grain drying by single drying equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a left view of the drying bin of the utility model.

[0021] Figure 2 It is a right side view of the drying bin of the utility model.

[0022] Figure 3 It is a rear view of the drying bin of the utility model.

[0023] Figure 4 It is a schematic diagram of the connection between the drying bin and the air collecting duct of the utility model.

[0024] Figure 5 It is a schematic diagram of the connection between the drying chamber and the complementary heat source of the utility model.

[0025] Figure 6 It is a schematic diagram of the utility model in which a drying bin and a chimney are connected via an air collecting duct.

[0026] Figure 7 It is a structural schematic diagram of the multi-layer mesh belt conveyor of the utility model.

[0027] In the figure, 1. drying bin; 101. feed port; 102. discharge port; 103. hot air outlet; 104. heat reflective coating; 2. material drying mechanism; 201. mesh belt conveyor; 202. feed hopper; 203. guide plate; 204. thresher; 301. upper photovoltaic thermal air duct; 302. lower photovoltaic thermal air duct; 303. photovoltaic power generation section; 304. thermal collection section; 305. fresh air inlet; 4. air collection duct; 5. chimney; 501. cable; 6. vertical wall; 601. heat absorbing coating; 7. fresh air window; 8. air guide plate; 9. complementary heat source; 10. turbine generator; 11. vertical axis wind turbine. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] Example 1

[0030] like Figure 1-2 As shown, this embodiment provides a wind-solar-agriculture integrated natural energy utilization system, including a plurality of drying bins 1, each of which is a light steel structure with a steel content of 50-70 kg / m 2 , in this embodiment, 60kg / m 2 , generally a long strip structure in the east-west direction, or in the north-south direction. Drying bin 1 has a size of 400m×3m×3m, a designed wind load of ≤41.5m / s, a seismic intensity of 9 degrees, and a snow load of ≥2.5kN / m 2 A material drying mechanism 2 is provided in the drying bin 1 for drying corn cobs or other large-shaped materials.

[0031] Specifically, Figure 7 As shown, the material drying mechanism 2 includes three layers of mesh belt conveyors 201, and the distance between layers is 0.6m. A plurality of racks are arranged at the bottom of each layer of mesh belt conveyors 201 to play a supporting role, and the spacing between the racks is 10m. 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. The feeding end of the mesh belt conveyor 201 is provided with a feeding hopper 202, 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 guide plate 203 is arranged at the discharging port 102, and a thresher 204 is arranged below the guide plate 203. The corn cobs are dried during the transmission process on the mesh belt conveyor 201, and after drying, they fall into the thresher 204 along the guide plate 203 for threshing. The mesh belt is made of stainless steel SUS304, with a hole diameter of φ6mm and a width of 2.8m. Each meter of the mesh belt can carry 500kg of corn cobs, and the transmission speed is 3m / min.

[0032] The material drying mechanism 2 can also be a drying car, which can be a track-type or trackless universal wheel drying car. The main body of the drying car is a ventilation structure surrounded by metal or non-metal plastic mesh, such as a steel mesh enclosure material of φ8mm SUS304 material, with 60mm×60mm angle steel as the frame, and the drying car length×width×height=4m×2.8m×2.7m, with a carrying capacity of about 30m 3, about a single drying car loads 24 tons of fresh corn. The discharge port 102 at the bottom of the drying car can be automatically controlled by a solenoid valve to unload.

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

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

[0035] The outside fresh air enters the upper photovoltaic light thermal air duct 301 and the lower photovoltaic light thermal air duct 302 through the fresh air inlet 305, first passes through the photovoltaic power generation section 303, and uses the fresh air to cool the photovoltaic glass, so as to obtain higher power generation efficiency and preheat the fresh air to achieve cogeneration of heat and power; the preheated fresh air then passes through the light thermal collection section 304, and the sunlight passes through the hollow or vacuum low iron high light transmittance tempered glass and irradiates the heat absorbing coating 601 on the vertical wall 6. The heat absorbing coating 601 absorbs the heat of the sunlight and heats the fresh air passing through, thereby generating hot air, which then enters the drying bin 1 through the hot air inlet, moves in the opposite direction of the corn cob conveying direction, and dries the corn cobs. In order to ensure the relative movement of 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 of 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 to the dried material to cool it down.

[0036] Among them, Figure 1-2 As shown, a plurality of inclined air guide plates 8 are arranged on the three inner walls of the drying bin 1, so as to guide the hot air to the material drying mechanism 2 in the middle of the drying bin 1, so as to make full use of the hot air to dry the material. Figure 1-2 As 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] like Figure 6 As shown, the whole consisting of the drying bin 1, the upper photovoltaic thermal air duct 301 and the lower photovoltaic thermal air duct 302 can be provided in multiple numbers, and each of them is connected to a chimney 5 through an air collecting duct 4, and the connection between the drying bin 1 and the chimney 5 is realized through the air collecting duct 4; each whole can be connected in series, in parallel, or in series and parallel.

[0038] Example 2

[0039] On the basis of Example 1, Figure 1-2 As shown, a plurality of vertical axis wind turbines 11 are arranged on the top of the upper photovoltaic thermal air duct 301, with a single unit power of 3kw, a machine distance of 4m, a total of 100 units installed, and a total power generation capacity of 300kw.

[0040] Example 3

[0041] On the basis of Example 1, Figure 6As shown, the chimney 5 has a height of 100-1000m, a DN diameter of 1-10m, is made of metal material, is connected by multiple flanges, and is provided with multiple cables 501. A wind power generation device is provided on the chimney 5, and the wind power generation device includes a turbine generator 10 installed inside the chimney 5 and a multi-layer wind power generator set at the external flange of the chimney 5, and each layer of the wind power generator set includes a plurality of vertical axis wind power generators 11.

[0042] In order to better create a larger temperature difference between the upper and lower parts of the chimney 5, so as to generate suction for the hot air in the drying chamber 1 and allow the hot air in the drying chamber 1 to smoothly enter the chimney 5, the chimney 5 can be coated with black, blue, yellow (gray), white and other coatings from bottom to top, with the colors from dark to light, and the heat absorption of sunlight from strong to weak to reflection.

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

[0044] A vertical axis wind turbine 11 is installed at the joint flange of the chimney 5, 1115 vertical axis wind turbines with a generating capacity of 4 kW are installed in each of sections 1 to 4, 10 are installed in each of sections 5 to 7, 8 are installed in each of sections 8 to 10, 3 are installed in section 11, and no vertical axis wind turbine 11 is installed in section 12. A total of 11117 4 kW vertical axis wind turbines are installed, with an installed generating capacity of 468 kW.

[0045] At 30℃ ambient temperature and 15:00 in the afternoon, the inner surface temperature of chimney 5 in the solar radiation zone at the dark blue part at a height of 100m was measured to be 85℃, the inner surface temperature of chimney 5 in the creamy yellow part at a height of 230m was 56℃, and the inner surface temperature of chimney 5 in the white part at a height of 290m was 35℃. Therefore, the temperature difference between the upper and lower surfaces of chimney 5 is 50℃.

[0046] On a sunny day in the north in winter with a temperature of -15℃, at 11:00 a.m., the wind velocity of chimney 5 was measured to be 19m / s; on a sunny day in summer with a temperature of 36℃, at 17:00 p.m., the wind velocity of chimney 5 was measured to be 30.5m / s; in the corn drying season in late October, the temperature was 28℃, and at 11:00 a.m., the wind velocity of chimney 5 was measured to be 16m / s during drying.

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

[0048] Example 4

[0049] On the basis of Example 1, Figure 3 As shown, 4-6 0.15m×1.2m fresh air windows 7 are arranged on the vertical wall 6 of the photovoltaic power generation section 303 of the upper photovoltaic thermal air supply duct 301. The photovoltaic cogeneration of the utility model utilizes multi-point window opening to introduce fresh air to cool the photovoltaic glass, so as to avoid the photovoltaic glass temperature being too high and affecting the power generation efficiency, and at the same time of obtaining higher power generation efficiency, the fresh air is heated to realize the cogeneration of heat and power.

[0050] Example 5

[0051] On the basis of Example 1, Figure 5 As shown, the hot air outlet 103 of the drying bin 1 is connected to a complementary heat source 9 through a pipeline. The complementary heat source 9 can be a solar collector, an air source heat pump, a solid energy storage (heat) module E3, or one or more of which are connected in series or in parallel. The air outlet of the complementary heat source 9 is connected to the hot air inlet of the drying bin 1 through a pipeline. The complementary heat source 9 collects the sensible heat discharged from the hot air outlet 103 of the drying bin 1 again to increase the COP of the heat pump, and then returns the hot air to the hot air inlet of the drying bin 1 to continue drying the material. This heat recovery mode only circulates between the drying bin 1 and the complementary heat source 9, and the hot air no longer enters the chimney 5 to generate electricity.

[0052] For example, in the drying season in October, when the nighttime ambient temperature is 5°C, the COP of the air source heat pump is 2, while the inlet temperature of the moist hot air for sensible heat recovery is 36°C. The COP of the air source heat pump can reach 4.2, with significant energy-saving effects.

[0053] The utility model can be used as a drying device during the material drying season, and can be used as a power plant at other times. Therefore, the utility model integrates photovoltaic cogeneration, solar thermal collection, wind power, and chimney 5 power generation, providing a demonstration for the complementary development of agriculture and energy in the future.

[0054] Although the present invention is described in detail by referring to the accompanying drawings and in combination with preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person skilled in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be 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. The wind, solar and agricultural integrated natural energy utilization system is characterized by: The invention comprises a plurality of drying chambers (1), wherein a material drying mechanism (2) is arranged in the drying chamber (1); an upper photovoltaic and thermal air supply duct (301) is arranged on the top of the drying chamber (1), wherein the upper photovoltaic and thermal air supply duct (301) comprises a photovoltaic power generation section (303) and a thermal energy collection section (304); a fresh air inlet (305) is arranged at one end of the upper photovoltaic and thermal air supply duct (301) corresponding to the photovoltaic power generation section (303), and a fresh air outlet (306) is arranged at one end of the upper photovoltaic and thermal air supply duct (301) corresponding to the thermal energy collection section (304). A hot air inlet and a discharge port (102) are arranged at one end of the drying chamber (1) corresponding to the photothermal heat collecting section (304) of the upper photovoltaic photothermal air supply duct (301), and a hot air outlet (103) and a feed port (101) are arranged at one end corresponding to the photovoltaic power generation section (303); the fresh air outlet of the upper photovoltaic photothermal air supply duct (301) is connected to the hot air inlet of the drying chamber (1); and the hot air outlet (103) of the drying chamber (1) is connected to the chimney (5) through an air collecting duct (4).

2. The wind-solar-agriculture integrated natural energy utilization system as claimed in claim 1, characterized in that: The material drying mechanism (2) comprises a plurality of layers of mesh belt conveyors (201), wherein a feeding end and a discharging end of the mesh belt conveyor (201) are respectively located at a feeding port (101) and a discharging port (102) of a drying bin (1), and a feeding hopper (202) is provided at the feeding end of the mesh belt conveyor (201).

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

4. The wind-solar-agriculture integrated natural energy utilization system as claimed in claim 3, characterized in that: The upper photovoltaic thermal air supply duct (301) and the lower photovoltaic thermal air supply duct (302) are both right-angled triangles, and the photovoltaic power generation section (303) includes photovoltaic glass arranged on the inclined surface, and the thermal collection section (304) includes hollow or vacuum low-iron high-transmittance tempered glass arranged on the inclined surface.

5. The wind-solar-agriculture integrated natural energy utilization system as claimed in claim 4, characterized in that: A heat-absorbing coating (601) is provided on the inner walls of the vertical walls (6) of the upper photovoltaic-thermal air supply duct (301) and the lower photovoltaic-thermal air supply duct (302).

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

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

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

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

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

Images