An unconventional water catchment sprinkling method and device for recovering vegetation in a photovoltaic plant

Abstract

The application belongs to the technical field of unconventional water recycling, and specifically discloses a kind of unconventional water catchment sprinkling irrigation method and device for recovering vegetation in photovoltaic factory area, comprising the following steps: S1, collecting unconventional water;S2, filtering water;S3, water treatment;S4, recycling of unconventional water: according to the thickness of soil layer, ditching treatment is carried out on the side of water collection tank, and a plurality of transplanting ditches are obtained, the transplanting ditches are connected by water pipes, shrub planting is carried out on the transplanting ditches, the shrubs are separated by water retaining ridges, and the water obtained in S3 is used for shrub irrigation by sprinkling irrigation assembly.The application adopts the above-mentioned unconventional water catchment sprinkling irrigation method and device for recovering vegetation in photovoltaic factory area, combines ecological vegetation restoration planting technology and unconventional water recycling technology, recycles unconventional water in the photovoltaic factory area by the way of "biological, physical catchment recycling", and utilizes it again, has remarkable economic, environmental and social benefits, to promote the green and sustainable development of photovoltaic industry.

Description

Technical Field

[0001] This invention relates to the field of unconventional water recycling technology, and in particular to an unconventional water catchment sprinkler irrigation method and apparatus for restoring vegetation in photovoltaic plant areas. Background Technology

[0002] With global attention and promotion of renewable energy, photovoltaic power generation, as a clean and renewable energy source, has been widely applied. The construction and operation of photovoltaic power plants often involve significant water consumption, such as for cleaning photovoltaic panels, equipment cooling, and ecological restoration. Furthermore, water scarcity and pollution are becoming increasingly serious problems, especially in arid regions, making water recycling particularly important. Unconventional water sources such as rainwater and reclaimed water (treated sewage and wastewater) are characterized by their reusability after treatment, and can, to some extent, replace conventional water resources, accelerating and improving the natural water cycle, thus maximizing the use of limited water resources.

[0003] In existing technologies, photovoltaic (PV) plant areas suffer from severe soil and vegetation damage due to problems such as poor soil, lack of water and fertilizer, which hinders plant growth. Self-recovery in these areas takes a long time to achieve results, necessitating vegetation restoration efforts. Therefore, developing a highly efficient, unconventional water recycling technology is crucial for improving resource utilization efficiency and promoting sustainable development in PV plant areas. Summary of the Invention

[0004] The purpose of this invention is to provide an unconventional water collection and sprinkler irrigation method and device for restoring vegetation in photovoltaic plant areas. Combining ecological vegetation restoration planting technology and unconventional water recycling technology, the unconventional water in photovoltaic plant areas is recycled and reused through "biological and physical water collection and reuse". This has significant economic, environmental and social benefits, so as to promote the green and sustainable development of the photovoltaic industry.

[0005] To achieve the above objectives, the present invention provides an unconventional water catchment sprinkler irrigation method for restoring vegetation in photovoltaic power plant areas, comprising the following steps:

[0006] S1. Collection of unconventional water: A water collection trough is set up below the edge of the photovoltaic panel. When the photovoltaic panel is cleaned or when it rains, unconventional water enters the water storage tank through the water collection trough.

[0007] S2. Filtration of unconventional water: Herbaceous plants are grown in the water collection tank, and the water in the collection tank is biologically filtered to remove large particles, and then finely filtered through the filter components.

[0008] S3. Treatment of unconventional water: Finely filtered water is fed into a water treatment unit for biological or chemical treatment to obtain water that meets the standards for reuse.

[0009] S4. Reuse of unconventional water: Based on the soil layer thickness, trenches are dug on the side of the water collection trough to obtain several transplanting trenches. The transplanting trenches are connected by water pipes. Shrubs are planted in the transplanting trenches, and the shrubs are separated by water-retaining ridges. The water obtained in S3 is used for irrigating the shrubs through sprinkler irrigation components.

[0010] Preferably, in S4, the soil layer thickness is 20-60cm, the lower layer of the soil layer is a pebble layer, and the trench depth of the transplanting trench is the same as the soil layer thickness.

[0011] Preferably, in S4, the water collection trough is dug deeper from the side to the farthest point, and the planting surface of the transplanting ditch is a slope with a certain angle, which is divided by water-retaining ridges.

[0012] Preferably, in S4, the water pipe is located at the end of the transplanting ditch away from the water collection trough, so that the water between the transplanting ditches can be interconnected at the lowest point of the planting surface of the transplanting ditch.

[0013] To achieve the above objectives, the present invention also provides an unconventional water collection and sprinkler irrigation device for restoring vegetation in photovoltaic plant areas, comprising a water collection tank and a water storage tank, wherein the water collection tank and the water storage tank are connected by a filter component, the water storage tank is provided with a water treatment component, and the water storage tank is connected to the outside world through a sprinkler irrigation component.

[0014] Preferably, the water storage tank is equipped with a liquid level monitoring system.

[0015] Preferably, the water collection tank is made of corrosion-resistant material and adopts a distributed design, located below the lower edge of the photovoltaic panel and around the photovoltaic equipment, and guides unconventional water to the water storage tank through a dedicated pipeline.

[0016] Preferably, the sprinkler assembly is connected to a power supply device, which is one or a combination of a photovoltaic panel or a storage battery.

[0017] Preferably, the water treatment component is one or a combination of a biological filter or a membrane filter.

[0018] Preferably, the filtration assembly employs a multi-stage filter.

[0019] Therefore, the present invention employs the above-mentioned unconventional water-collection sprinkler irrigation method and device for restoring vegetation in photovoltaic power plant areas, and the beneficial effects are as follows:

[0020] (1) The present invention adopts a water collection and sprinkler irrigation device. By collecting, treating and utilizing various water sources in the photovoltaic plant area, it can effectively recover unconventional water in the photovoltaic plant area to the maximum extent, realize the recovery and recycling of water resources, save water resources, and reduce dependence on external water sources. By recovering and utilizing water resources, the consumption of groundwater and natural water bodies is reduced, which is conducive to ecological environmental protection.

[0021] (2) The water recovered by the water collection and sprinkler irrigation device of the present invention can be used not only for greening irrigation, but also for photovoltaic panel cleaning, equipment cooling, etc., which reduces operating costs and improves the economic benefits of photovoltaic plant area.

[0022] (3) The present invention uses a water collection and sprinkler irrigation method that can be applied to various photovoltaic plant areas, especially in areas with scarce water resources. It has good adaptability and can cope with different terrain and climate conditions. Furthermore, it can carry out ditching and plant herbaceous plants, which facilitates the accumulation of wind and sand in the transplanting ditch and water collection trough, increases the soil layer thickness, and helps vegetation restoration and ecological environment protection. It has good promotion value.

[0023] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] Figure 1 This is a perspective view of an embodiment of an unconventional water collection and sprinkler irrigation device for restoring vegetation in a photovoltaic plant area according to the present invention;

[0025] Figure 2 This is a top view of an embodiment of an unconventional water collection and sprinkler irrigation device for restoring vegetation in a photovoltaic plant area according to the present invention;

[0026] Figure 3 This is a side view of an embodiment of an unconventional water collection and sprinkler irrigation device for restoring vegetation in a photovoltaic plant area according to the present invention;

[0027] Figure 4 This is a schematic diagram of an embodiment of an unconventional water collection and sprinkler irrigation device for restoring vegetation in a photovoltaic plant area according to the present invention.

[0028] Figure Labels

[0029] 1. Water collection tank; 2. Water storage tank; 3. Liquid level monitoring system; 4. Photovoltaic panel; 5. Water treatment components; 6. Multi-stage filter; 7. Sprinkler irrigation components; 8. Transplanting ditch; 9. Water pipe; 10. Shrubs; 11. Water-retaining ridge; 12. Herbaceous plants. Detailed Implementation

[0030] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0032] Example 1

[0033] like Figure 4As shown, an unconventional water collection and sprinkler irrigation device for restoring vegetation in a photovoltaic plant area includes a water collection tank 1 and a water storage tank 2. The water collection tank 1 and the water storage tank 2 are connected by a filter assembly. A water treatment assembly 5 is installed in the water storage tank 2. The water storage tank 2 is connected to the outside environment through a sprinkler irrigation assembly 7. The water collection tank 1 is used to collect water from wastewater generated during the cleaning of photovoltaic panels 4, equipment cooling, and rainfall. The water storage tank 2 is used to store the collected water. The filter assembly and water treatment assembly 5 are used to treat the collected water to meet reuse standards. The water storage tank 2 is also equipped with a liquid level monitoring system 3 for real-time monitoring of the water level to prevent overflow. The sprinkler irrigation assembly 7 is connected to a power supply device, which can be selected from photovoltaic panels or batteries or a combination thereof to provide power and ensure the normal operation of the entire water collection and sprinkler irrigation device.

[0034] Specifically, the water collection tank 1 is made of corrosion-resistant material and adopts a distributed design, located below the lower edge of the photovoltaic panels 4 and around the photovoltaic equipment in the photovoltaic plant area. Unconventional water (wastewater) is guided to the storage tank 2 through dedicated pipes, exhibiting good adaptability to different terrain and climate conditions. Dedicated PP pipes are installed at the bottom or both ends of the water collection tank 1, connecting to the PP storage tank 2, reducing material consumption and lowering costs. If the water volume in the photovoltaic plant area is small, the installation angle of the water collection tank 1 can be adjusted so that one end is lowered and connected to a PP storage tank 2. If the water volume in the photovoltaic plant area is large, the capacity or number of storage tanks 2 can be adjusted accordingly.

[0035] The filtration assembly employs a multi-stage filter 6, featuring both coarse and fine filtration functions. It prioritizes the removal of large particulate impurities, followed by multi-stage fine filtration to ensure effective removal of impurities from the collected wastewater. Finally, the wastewater enters the water treatment assembly 5 for further treatment. The water treatment assembly 5 is one or a combination of a biological filter or membrane filter, including physical and chemical treatment units. It ensures that the water quality meets the cleanliness requirements for greening irrigation, cleaning photovoltaic panels 4, cooling equipment, etc., and complies with reuse standards, achieving water resource recycling and reducing water consumption.

[0036] like Figures 1-3 As shown, in practical use, an unconventional water-fed sprinkler irrigation method for restoring vegetation in photovoltaic power plant areas includes the following steps:

[0037] S1. Collection of unconventional water: A water collection tank 1 is set below the edge of the photovoltaic panel 4. When the photovoltaic panel 4 is cleaned or when it rains, unconventional water enters the water storage tank 2 through the water collection tank 1.

[0038] S2. Filtration of unconventional water: Herbaceous plants 12 are planted in water collection tank 1, which not only have a filtration effect but also help to cover sand and increase the thickness of the soil layer. The water in water collection tank 1 undergoes biological filtration to remove large particles, and then passes through a filter assembly for fine filtration.

[0039] S3. Treatment of unconventional water: After fine filtration, the water enters the water treatment component 5 for biological or chemical treatment to obtain water that meets the standards for reuse.

[0040] S4. Reuse of Unconventional Water: The soil layer is approximately 20-60 cm thick, with a pebble layer at the bottom. Based on the soil layer thickness, trenches are dug along the side of the water collection trough 1 to create several transplanting trenches 8. The depth of the transplanting trenches 8 is the same as the soil layer thickness. The water collection trough 1 is approximately 40.5 m away from the photovoltaic panels, with its edge overlapping the transplanting trenches 8. Shrubs 10 are planted on the transplanting trenches 8. The transplanting trenches 8 facilitate wind and sand accumulation, increase the soil layer thickness, and contribute to vegetation restoration and ecological protection. Shrubs 10 are selected from native plants with strong resistance to runners or roots, and tubers. An optimal fertilization plan is developed based on soil texture, nutrient status, and other factors to conserve water through fertilizer application. The shrubs 10 are separated by water-retaining ridges 11. The water collection trough 1 is dug deeper and deeper from the side to the farthest point. The planting surface of the transplanting ditch 8 is divided by the water-retaining ridges 11 and has a certain angle of inclination, so that the irrigation water can stay between the water-retaining ridges 11.

[0041] Wastewater flows into water collection tank 1, first passes through biological filtration of herbaceous plants 12 to remove some impurities, then passes through a filter assembly to ensure that impurities in the wastewater are effectively removed, and then enters water treatment assembly 5 and water storage tank 2 through a dedicated pipeline. Water treatment is carried out in two parts in water storage tank 2, and finally the water obtained in S3 is used for irrigating shrubs 10 through sprinkler assembly 7.

[0042] The transplanting trenches 8 are connected by water pipes 9, which are made of 300mm diameter PVC pipes, further reducing material consumption and lowering costs. The water pipes 9 are located at the end of the transplanting trench 8 furthest from the water collection trough 1, allowing water to flow between the lowest points of the planting surfaces of the transplanting trenches 8. If there is still flowing irrigation water at the lowest point of the planting surface of one or more transplanting trenches 8, it can flow back through the water pipes 9 to the lowest point of the planting surface of adjacent or other transplanting trenches 8. If the water volume is large, it can also flow back to higher planting surfaces, achieving water resource recycling and reducing water consumption.

[0043] In this embodiment, unconventional water-collection sprinkler irrigation was carried out for vegetation restoration based on the 30MW photovoltaic power station in Jiaguguan, Gansu. The annual precipitation in this area is less than 100mm, pH=9.27, soil SOC=2.7g / kg, AN=15.53mg / kg, AP=0.06mg / kg, AK=366mg / kg. The soil layer thickness in the plant area is about 30cm, with cobblestones below. No obviously moist soil was observed in the top 30cm soil layer, indicating extremely low soil moisture content. The photovoltaic panel 4 is 400cm wide, and the water collection trough 1 is set in a 20cm deep soil layer. The water collection trough 1 is about 50cm wide, and its length is basically the same as the length of the photovoltaic panel 4. The spacing between the water-retaining ridges 11 is about 50cm, distributing the collected rainwater into the artificially dug transplanting trenches 8 to irrigate the shrubs 10. The planted area is growing well.

[0044] Therefore, the present invention adopts the above-mentioned unconventional water collection and sprinkler irrigation method and device for restoring vegetation in photovoltaic plant areas, combined with ecological vegetation restoration planting technology and unconventional water recycling technology. Through the "biological and physical water collection and reuse" method, unconventional water in photovoltaic plant areas is recycled and reused, which has significant economic, environmental and social benefits, so as to promote the green and sustainable development of the photovoltaic industry.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A non-conventional water-collection sprinkler irrigation method for restoring vegetation in a photovoltaic power plant area, characterized in that, Includes the following steps: S1. Collection of unconventional water: A water collection trough is set up below the edge of the photovoltaic panel. When the photovoltaic panel is cleaned or when it rains, unconventional water enters the water storage tank through the water collection trough. S2. Filtration of unconventional water: Herbaceous plants are grown in the water collection tank, and the water in the collection tank is biologically filtered to remove large particles, and then finely filtered through the filter components. S3. Treatment of unconventional water: Finely filtered water is fed into a water treatment unit for biological or chemical treatment to obtain water that meets the standards for reuse. S4. Reuse of unconventional water: Based on the soil layer thickness, trenches are dug on the side of the water collection trough to obtain several transplanting trenches. The transplanting trenches are connected by water pipes. Shrubs are planted in the transplanting trenches. The shrubs are separated by water-retaining ridges. The water obtained in S3 is used for irrigating the shrubs through sprinkler irrigation components. In S4, the soil layer thickness is 20-60cm, and the lower layer of the soil layer is a pebble layer. The trench depth of the transplanting trench is the same as the soil layer thickness. The water collection trough is dug deeper from the side to the farthest point. The planting surface of the transplanting trench is divided by water-retaining ridges and exists as a slope with a certain angle. The water pipe is set at the end of the transplanting trench away from the water collection trough, so that the water between the transplanting trenches can be connected at the lowest point of the planting surface of the transplanting trench. The unconventional water collection and sprinkler irrigation method for restoring vegetation in the photovoltaic plant area adopts an unconventional water collection and sprinkler irrigation device, which includes a water collection tank and a water storage tank. The water collection tank and the water storage tank are connected by a filter component. A water treatment component is installed in the water storage tank. The water storage tank is connected to the outside world through the sprinkler irrigation component. The water collection tank is made of corrosion-resistant material and adopts a distributed design. It is set below the lower edge of the photovoltaic panel and around the photovoltaic equipment. Unconventional water is guided to the water storage tank through a dedicated pipeline.

2. The unconventional water-fed sprinkler irrigation method for restoring vegetation in a photovoltaic plant area according to claim 1, characterized in that, The water storage tank is equipped with a liquid level monitoring system.

3. The unconventional water-collection sprinkler irrigation method for restoring vegetation in a photovoltaic plant area according to claim 1, characterized in that, The sprinkler assembly is connected to a power supply device, which may be a combination of a photovoltaic panel or a storage battery.

4. The unconventional water-fed sprinkler irrigation method for restoring vegetation in a photovoltaic plant area according to claim 1, characterized in that, The water treatment component is one or a combination of a biological filter or a membrane filter.

5. The unconventional water-collection sprinkler irrigation method for restoring vegetation in a photovoltaic plant area according to claim 1, characterized in that: The filtration assembly employs a multi-stage filter.

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