Renewable energy supply system of irrigation water pump

Abstract

The invention relates to the technical field of agricultural irrigation, in particular to a renewable energy supply system of an irrigation water pump based on biomass energy, solar energy and wind energy. According to the structure, a biological energy combustion device is connected with a water tank through a heating opening, the water tank is connected with an irrigation water pump through a first heat collecting pipe, a disc type solar heat collecting device, a groove type solar heat collecting device and an enhanced heating pipe are arranged on the first heat collecting pipe, and a second heat collecting pipe is further arranged between the irrigation water pump and the water tank. A circulating water pump is arranged on the second heat collecting pipe, and the irrigation water pump is connected with an irrigation water pipe. Various renewable energy sources are used as sustainable energy sources of the irrigation water pump, the system has the advantages of being clean and low in carbon, the influence on a power grid due to the fact that the water pump is driven by electric energy in the current irrigation season is improved, and the irrigation cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural irrigation, and particularly relates to a renewable energy supply system for an irrigation water pump based on biomass energy, solar energy, and wind energy, which is applicable to the sustainable energy supply of irrigation water pumps in rural areas. Background Art

[0002] Traditional irrigation water pumps rely on diesel engines or the power grid for power supply. Diesel water pumps have problems of pollution and high costs. Traditional electric energy-driven irrigation water pumps are usually intensively used during the peak water demand period of crops, such as in the dry season or summer, resulting in a sharp increase in the power grid load in the short term, causing problems such as seasonal overload, high reactive power demand, and voltage fluctuations, which are particularly significant in rural areas. Moreover, the power supply method of the power grid for irrigation water pumps has a high irrigation cost.

[0003] In rural remote areas, there are also technical problems with difficult power grid coverage. To solve such problems, a single renewable energy (such as only photovoltaic) power supply method has emerged. However, this method for supplying energy to irrigation water pumps has poor power supply stability, is greatly affected by the weather, and cannot meet the continuous irrigation demand. Rural areas have resource endowments, with rich renewable energy resources such as solar energy, wind energy, and biomass energy, and the rural areas have vast land. Taking biomass energy as an example, the straw after autumn harvest is usually left in the field and burned before the spring sowing period. This method not only wastes biomass energy but also causes environmental pollution.

[0004] Therefore, there is an urgent need to develop a sustainable energy source for irrigation water pumps by using multiple renewable energy sources, so as to improve the impact of the current electric energy-driven water pumps on the power grid. Moreover, the use of renewable energy resources is clean and low-carbon, while reducing the irrigation cost in rural areas, and also realizing the comprehensive utilization of renewable energy in rural areas. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a renewable energy supply system for an irrigation water pump, which uses multiple renewable energy sources as a sustainable energy source for the irrigation water pump, is clean, low-carbon, has good stability, improves the impact of the current electric energy-driven water pump on the power grid, and reduces the irrigation cost.

[0006] To solve the above technical problem, the present invention is realized by the following technical means: A renewable energy supply system for an irrigation water pump has the following structure: a bioenergy combustion device is connected to a water tank through a heating port. The water tank is connected to the irrigation water pump through a first heat collecting pipe. A dish-type solar heat collecting device, a trough-type solar heat collecting device, and a strengthened heating pipe are arranged on the first heat collecting pipe. A second heat collecting pipe is also arranged between the irrigation water pump and the water tank. A circulation water pump is arranged on the second heat collecting pipe. The irrigation water pump is connected to an irrigation water pipe.

[0007] Preferably, the enhanced heating tube is connected to the battery pack via wires, the charge and discharge controller is connected to the battery pack, and the battery pack is connected to the circulating water pump via wires.

[0008] Preferably, a first switch is provided on the electric wire between the battery pack and the enhanced heating tube, and a second switch is provided on the electric wire between the battery pack and the circulating water pump.

[0009] Preferably, the battery pack is connected to the foldable photovoltaic panel via wires.

[0010] Preferably, the battery pack is connected to the small wind turbine via an inverter through a wire.

[0011] Preferably, the water outlet of the water tank is connected to a disk-type solar thermal concentrator through a first heat collecting pipe, and the disk-type solar thermal concentrator is installed on a metal bracket.

[0012] Preferably, the metal bracket has a stepped structure.

[0013] Preferably, the first heat collecting tube and the second heat collecting tube are metal tubes with heat absorbing coating.

[0014] Preferably, the biomass combustion device is provided with a water injection port and a water level indicator.

[0015] Preferably, a feed port is installed at the front end of the biomass combustion device.

[0016] Due to the adoption of the above technical solution, the present invention has the following beneficial effects: The present invention is an irrigation water pump system that utilizes renewable energy as its energy source. This system changes the current situation where traditional irrigation water pumps use electricity as their driving energy source, and instead uses multiple renewable energy sources as sustainable energy sources for irrigation water pumps. It not only improves the impact of current electric-driven water pumps on the power grid and alleviates the pressure placed on the power grid by traditional irrigation water pumps, but also utilizes renewable energy resources in a clean and low-carbon manner. It also reduces the cost of rural irrigation, realizes the comprehensive utilization of renewable energy in rural areas, and promotes the adjustment of energy structures in rural areas. The renewable energy energy supply system for the irrigation water pump of the present invention utilizes a solar concentrating device, including a disc-type solar thermal concentrating device and a trough-type solar thermal concentrating device, to convert solar energy into thermal energy, heating the working fluid water in the heat collecting tube to form high-temperature, high-pressure steam that drives the water pump, thereby achieving agricultural irrigation. When the energy of solar thermal resources is insufficient, photovoltaic power generation, wind power generation, and biomass energy heating are used to achieve enhanced heating of the working fluid, achieving a higher power output, thereby meeting the flow and head requirements of the irrigation water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the renewable energy energy supply system of the irrigation water pump of the present invention.

[0018] 1. Biomass combustion device; 2. Metal bracket; 3. First heat collecting tube; 4. Dish solar energy heat collecting device; 5. Trough solar energy heat collecting device; 6. Folding photovoltaic panel; 7. Small wind turbine; 8. Battery pack; 9. Inverter; 10. Charge and discharge controller; 11. Enhanced heating tube; 12. Wire; 13. First switch; 14. Irrigation water pump; 15. Water tank; 16. Circulation water pump; 17. Water injection port; 18. Water level indicator; 19. Feed inlet; 20. Heating port; 21. Water pipe; 22. Second switch; 23. Second heat collecting tube. Specific embodiments

[0019] The present invention will be further described in detail below in conjunction with embodiments. The following embodiments are only several specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantive improvement made to the present invention using this concept shall fall within the protection scope of the present invention.

[0020] As Figure 1 shown, a renewable energy power supply system for an irrigation water pump according to the present invention has the following structure. The biomass combustion device 1 is connected to the water tank 15 through the heating port 20. A feed inlet 19 is installed at the front end of the biomass combustion device 1. A water injection port 17 and a water level indicator 18 are provided on the water tank 15. The water tank 15 is connected to the irrigation water pump 14 through the first heat collecting tube 3. The first heat collecting tube 3 is provided with a dish solar energy heat collecting device 4, a trough solar energy heat collecting device 5, and an enhanced heating tube 11. The water outlet of the water tank 15 is connected to the dish solar energy heat collecting device 4 through the first heat collecting tube 3. The dish solar energy heat collecting device 4 is installed on the metal bracket 2. A second heat collecting tube 23 is also provided between the irrigation water pump 14 and the water tank 15. A circulation water pump 16 is provided on the second heat collecting tube 23. The irrigation water pump 14 is connected to the irrigation water pipe 21. The enhanced heating tube 11 is connected to the battery pack 8 through a wire. A first switch 13 is provided on the wire between the battery pack 8 and the enhanced heating tube 11. The folding photovoltaic panel 6 is connected to the battery pack 8 through a wire. The small wind turbine 7 is connected to the battery pack 8 through the wire 12 via the inverter 9. The charge and discharge controller 10 is connected to the battery pack 8. The battery pack 8 is connected to the circulation water pump 16 through a wire. A second switch 22 is provided on the wire between the battery pack 8 and the circulation water pump 16.

[0021] The metal bracket 2 has a stepped structure; the first heat collecting tube 3 and the second heat collecting tube 23 are metal tubes with heat absorption coatings.

[0022] The specific structure and working principle of the present invention are as follows: The bioenergy combustion device 1 realizes auxiliary heating by heating the water tank 15 to generate hot steam. The bioenergy combustion device 1 mainly uses agricultural waste such as straw, which can not only realize the local utilization of biomass energy resources rich in rural areas, but also effectively utilize agricultural waste and inhibit the phenomenon of burning stubble. The bioenergy combustion device 1 generates heat energy through combustion, heats the working medium in the water tank 15, and generates high-temperature and high-pressure steam. The water tank 15 is a metal container with an endothermic coating on its outer surface, and its water injection port 17 and water level indicator 18 are installed to supplement the working medium water and indicate the water level respectively. The function of the water tank 15 is to heat and store the working medium water. The hot steam after doing work enters the water tank 15 under the action of the pressure of the water tank 15 and the circulating water pump 16 through the second heat collecting pipe 23. After being heated by the water tank 15 (heating by the endothermic coating and / or the bioenergy combustion device 1), the outlet water of the water tank 15 is formed, which is connected to the dish-shaped solar energy concentrating device 4 located on the metal bracket 2 through the first heat collecting pipe 3. The first heat collecting pipe 3 and the second heat collecting pipe 23 penetrate the renewable energy supply system of the entire irrigation water pump.

[0023] The metal bracket 2 is stepped and has a certain height from the ground. Its main function is to support the dish-shaped solar energy concentrating device 4. The dish-shaped solar energy concentrating device 4 is arranged on the farmland in rows and columns through the metal bracket 2. Such a design utilizes the longitudinal space, neither occupying the farmland nor reducing the shading of crops, ensuring that the crops receive sufficient sunlight. The first heat collecting pipe 3 and the second heat collecting pipe 23 are metal pipes with an endothermic coating. Since irrigation usually occurs in summer and the ambient temperature is relatively high, the heat dissipation between the heat collecting pipe and the surrounding environment is not considered, so the heat collecting pipe is not provided with a thermal insulation layer, which can reduce the system cost. Multiple dish-shaped solar energy concentrating devices 4 respectively heat the working medium in the first heat collecting pipe 3 with the concentrated solar energy, and then form high-temperature and high-pressure steam. After passing through the dish-shaped solar energy concentrating device 4, the working medium in the first heat collecting pipe 3 is continuously heated by the trough-shaped solar energy concentrating device 5. The trough-shaped solar energy concentrating device 5 is arranged on the ground to minimize the occupation and shading of the farmland.

[0024] When approaching the irrigation water pump 14, the electric energy generated by the folding photovoltaic panel 6 and the small wind turbine 7 passes through the battery pack 8, the wire and the first switch 13 to be connected to the enhanced heating pipe 11, realizing the further heating of the heat collecting pipe 3, thereby further heating the working medium. The folding photovoltaic panel 6 is characterized by being movable and can be arranged according to the power demand. It can be removed in the non-irrigation season to save space. The direct current generated by it directly charges the battery pack 8. The alternating current generated by the small wind turbine 7 is charged to the battery pack 8 after passing through the inverter 9. The charge and discharge controller 10 can realize the overcharge and over-discharge protection of the battery pack 8, as well as functions such as preventing the battery from discharging reversely to the solar panel at night, overload protection, and short-circuit protection.

[0025] After being burned and heated by the bioenergy combustion device 1, and concentrated and heated by the solar energy concentrating device (the dish solar energy concentrating device 4 and the trough solar energy concentrating device 5), and under the combined action of the enhanced heating tube 11 for electric heating, high-temperature and high-pressure steam is formed to drive the irrigation water pump 14 to achieve farmland irrigation through the water pipe 21. The irrigation water pump 14 has two sealed chambers connected by a rotating shaft. One chamber is driven by hot steam to rotate the rotating shaft at a high speed, and the other chamber has an impeller rotating at a high speed to generate centrifugal force, which is converted into liquid kinetic energy and pressure energy to achieve continuous water delivery. The battery pack 8 supplies power to the circulating water pump 16, and supplies power to the connected irrigation water pump 16 through the wire and the second switch 22. The opening and closing of the second switch 22 realizes the start and stop control of the irrigation water pump 16.

[0026] The renewable energy supply system of the irrigation water pump can be divided into five major parts, including the biomass combustion heating subsystem, the solar energy concentrating and heat collection subsystem, the wind-solar-storage subsystem, the irrigation water pump subsystem, and the working medium circulation subsystem. Among them, the biomass combustion heating subsystem, the solar energy concentrating and heat collection subsystem, and the wind-solar-storage subsystem provide energy input, and operate in combination or independently according to the flow rate and head requirements of the irrigation water pump. The specific operation strategy is as follows: On sunny days with wind or without wind during the day, it mainly operates in combination with the solar energy concentrating and heat collection subsystem and the wind-solar-storage subsystem. During the sunny noon period (when solar resources are very abundant), the solar energy concentrating and heat collection subsystem can also operate independently, and the wind-solar-storage subsystem only needs to store energy in the battery. On rainy or cloudy days or windy nights (when solar resources are insufficient or there is no solar resource), the biomass combustion heating subsystem and the wind energy or the energy stored in the battery pack in the wind-solar-storage subsystem are used to provide energy to ensure the system operation. On rainy or cloudy days or windless nights, the biomass combustion heating subsystem operates alone to provide energy supply, or when the battery pack in the wind-solar-storage subsystem has energy, the biomass combustion heating subsystem and the wind-solar-storage subsystem operate in combination.

[0027] The renewable energy supply system of the irrigation water pump utilizes the abundant solar energy, wind energy, and biomass energy resources in rural areas. When solar resources are particularly abundant, the solar energy concentrating and heat collection system uses solar heat to supply energy to the irrigation water pump; when wind and solar resources are rich, the wind-solar-storage subsystem is used to assist in supplying energy. When solar and wind energy resources are insufficient, biomass energy can be used to achieve energy supply through the bioenergy combustion system. Through the working medium circulation system and the irrigation water pump system, energy transmission and energy conversion are realized, thus achieving agricultural irrigation using the renewable energy supply system.

Claims

1. A renewable energy supply system for an irrigation water pump, characterized in that The structure is as follows: The bioenergy combustion device (1) is connected to the water tank (15) through the heating port (20). The water tank (15) is connected to the irrigation water pump (14) through the first heat collection pipe (3). The first heat collection pipe (3) is provided with a dish solar energy heat collection device (4), a trough solar energy heat collection device (5) and an enhanced heating pipe (11). A second heat collection pipe (23) is also provided between the irrigation water pump (14) and the water tank (15). A circulation water pump (16) is provided on the second heat collection pipe (23). The irrigation water pump (14) is connected to the irrigation water pipe (21).

2. The renewable energy power supply system for an irrigation water pump according to claim 1, characterized in that The enhanced heating pipe (11) is connected to the battery pack (8) through an electric wire. The charge-discharge controller (10) is connected to the battery pack (8). The battery pack (8) is connected to the circulation water pump (16) through an electric wire.

3. The renewable energy power supply system of an irrigation water pump according to claim 2, characterized in that A first switch (13) is provided on the electric wire between the battery pack (8) and the enhanced heating pipe (11). A second switch (22) is provided on the electric wire between the battery pack (8) and the circulation water pump (16).

4. The renewable energy power supply system for an irrigation water pump according to claim 2, characterized in that The battery pack (8) is connected to the folding photovoltaic panel (6) through an electric wire.

5. A renewable energy supply system for an irrigation water pump according to claim 2, 3 or 4, characterized in that The battery pack (8) is connected to the small wind turbine (7) through a wire (12) via an inverter (9).

6. The renewable energy supply system for an irrigation water pump according to claim 1, characterized in that The water outlet of the water tank (15) is connected to the dish solar energy heat collection device (4) through the first heat collection pipe (3). The dish solar energy heat collection device (4) is installed on the metal bracket (2).

7. The renewable energy power supply system of an irrigation water pump according to claim 6, characterized in that The metal bracket (2) has a stepped structure.

8. The renewable energy power supply system for an irrigation water pump according to claim 1, characterized in that The first heat collection pipe (3) and the second heat collection pipe (23) are metal pipes with a heat absorption coating.

9. The renewable energy supply system for an irrigation water pump according to claim 1, characterized in that The bioenergy combustion device (1) is provided with a water injection port (17) and a water level indicator (18).

10. The renewable energy power supply system for an irrigation water pump according to claim 1 or 9, characterized in that A feed inlet (19) is installed at the front end of the bioenergy combustion device (1).

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