Unconventional water catchment spray irrigation method and device for recovering vegetation in photovoltaic plant area

Abstract

The invention belongs to the technical field of unconventional water recycling, and particularly discloses an unconventional water catchment spray irrigation method and device for recovering vegetation in a photovoltaic plant district, and the method comprises the following steps: S1, collecting unconventional water; s2, filtering the water; s3, water treatment; and S4, recycling of unconventional water: according to the thickness of a soil layer, ditching treatment is performed on the side edge of the water collecting tank to obtain a plurality of transplanting ditches, the transplanting ditches are connected through water pipes, shrubs are planted on the transplanting ditches, the shrubs are separated through water retaining ridges, and the water obtained in the S3 is used for shrub irrigation through a spray irrigation assembly. According to the unconventional water catchment spray irrigation method and device for recovering the vegetation in the photovoltaic plant area, the unconventional water in the photovoltaic plant area is recovered and reutilized by combining an ecological vegetation recovery planting technology and an unconventional water recovery technology through a biological and physical catchment recycling mode, and the unconventional water in the photovoltaic plant area is recovered and recycled. The method has remarkable economic, environmental and social benefits, and green and sustainable development of the photovoltaic industry is promoted.

Description

Technical Field

[0001] The invention relates to the technical field of unconventional water recycling, and in particular to an unconventional water collection and sprinkler irrigation method and device for restoring vegetation in a photovoltaic plant area. Background Art

[0002] With the global attention and promotion of renewable energy, photovoltaic power generation has been widely used as a clean and renewable energy source. The construction and operation of photovoltaic plants are often accompanied by a large amount of water consumption, such as cleaning photovoltaic panels, equipment cooling, ecological restoration, etc. In addition, the shortage and pollution of water resources are becoming increasingly serious, especially in arid areas, and the recycling of water resources is particularly important. The characteristics of unconventional water sources such as rainwater and recycled water (sewage and wastewater that have been recycled) are that they can be recycled after treatment, which can replace conventional water resources to a certain extent, accelerate and improve the circulation process of natural water resources, and make limited water resources more effective.

[0003] In the existing technology, the photovoltaic plant area has been severely damaged due to poor soil, lack of water and fertilizer, which is not conducive to plant growth. It takes a long time to achieve the effect by self-recovery, and it is necessary to restore the vegetation in the photovoltaic plant area. Therefore, the development of an efficient unconventional water recycling technology is of great significance to improve the resource utilization efficiency of photovoltaic plants and promote sustainable development. Summary of the invention

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

[0005] To achieve the above object, the present invention provides an unconventional water-collecting sprinkler irrigation method for restoring vegetation in a photovoltaic plant area, comprising the following steps:

[0006] S1. Collection of unconventional water: A water collection tank is opened under the edge of the photovoltaic panel. When the photovoltaic panel is cleaned or it rains, unconventional water enters the water storage tank through the water collection tank;

[0007] S2. Filtration of unconventional water: Planting herbs in the water collection tank, removing large particles from the water collection tank through biological filtration, and then finely filtering through the filtration component;

[0008] S3. Treatment of unconventional water: The finely filtered water enters the water treatment component for biological or chemical treatment to obtain water that meets the reuse standards;

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

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

[0011] Preferably, in S4, the water collecting trough is deepened from the side to the farthest point, and the planting surface of the transplanting ditch divided by the water retaining ridge is present as an inclined surface with a certain inclination angle.

[0012] Preferably, in S4, a water pipe is disposed at one end of the transplanting trench away from the water collecting trough, so that the water between the transplanting trenches can be interconnected at the lowest point of the planting surface of the transplanting trench.

[0013] To achieve the above-mentioned purpose, the present invention also provides an unconventional water collection and sprinkler irrigation device for restoring vegetation in a photovoltaic plant area, comprising a water collecting trough and a water storage tank, wherein the water collecting trough and the water storage tank are connected via a filtering component, a water treatment component is arranged in the water storage tank, and the water storage tank is connected to the outside world via a sprinkler irrigation component.

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

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

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

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

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

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

[0020] (1) The present invention adopts a water collection sprinkler device, which can effectively recycle unconventional water in the photovoltaic plant to the maximum extent by collecting, processing and utilizing various water sources in the photovoltaic plant, realize the recycling and circular utilization of water resources, save water resources, and reduce dependence on external water sources; by recycling and utilizing water resources, the consumption of groundwater and natural water bodies is reduced, which is helpful for ecological environment protection.

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

[0022] (3) The present invention can be applied to various photovoltaic plants through the water collection sprinkler irrigation method, especially in areas with water shortage. It has good adaptability and can cope with different terrains and climatic conditions. It can also carry out trenching and planting of herbaceous plants, which is convenient for wind and sand to accumulate in transplanting trenches and water collection troughs, increase the thickness of the soil layer, contribute to vegetation restoration and ecological environment protection, and has good promotion value.

[0023] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 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 It 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 It 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 It is a structural 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] Reference numerals

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

[0030] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0031] Unless otherwise defined, technical or scientific terms used in the present invention shall have the common meanings understood by one having ordinary skills in the field to which the present invention belongs.

[0032] Embodiment 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 collecting tank 1 and a water storage tank 2. The water collecting tank 1 and the water storage tank 2 are connected through a filtering component. A water treatment component 5 is provided in the water storage tank 2. The water storage tank 2 is connected to the outside world through a sprinkler irrigation component 7. The water collecting tank 1 is used to collect water from wastewater generated by photovoltaic panel 4 cleaning, equipment cooling, and rainfall. The water storage tank 2 is used to store the collected water, and the filtering component and the water treatment component 5 are used to treat the collected water to meet the standards for reuse. A liquid level monitoring system 3 is also provided in the water storage tank 2 for real-time monitoring of the water level to avoid overflow. The sprinkler irrigation component 7 is connected to a power supply device, and the power supply device can select one or a combination of photovoltaic panels or batteries to realize power supply 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 materials. The water collection tank 1 adopts a distributed design and is arranged below the lower edge of the photovoltaic panel 4 in the photovoltaic plant and around the photovoltaic equipment. The unconventional water (wastewater) is guided to the water storage tank 2 through a dedicated pipe. It has good adaptability and can cope with different terrain and climatic conditions. A dedicated pipe made of PP material is installed at the bottom or both ends of the water collection tank 1 and connected to the water storage tank 2 made of PP material to reduce consumables and reduce costs. If the amount of water in the photovoltaic plant is small, the installation angle of the water collection tank 1 can be adjusted so that one end of the water collection tank 1 is lowered and connected to a water storage tank 2 made of PP material. If the amount of water in the photovoltaic plant is large, the capacity or number of the water storage tank 2 can be appropriately adjusted.

[0035] The filter assembly adopts a multi-stage filter 6, which has coarse filtration and fine filtration functions, and preferentially removes large particle impurities, and then undergoes multi-stage fine filtration to ensure that impurities in the collected wastewater are effectively removed, and finally enters the water treatment assembly 5 for further treatment. The water treatment assembly 5 is one or a combination of a biological filter or a membrane filter, including physical and chemical treatment units, to ensure that the water quality meets the cleaning requirements of greening irrigation, cleaning photovoltaic panels 4, cooling equipment, etc., meets the reuse standards, realizes the recycling of water resources, and reduces water consumption.

[0036] like Figure 1 to Figure 3 As shown, in actual use, an unconventional water-collecting sprinkler irrigation method for restoring vegetation in a photovoltaic plant area includes the following steps:

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

[0038] S2. Filtration of unconventional water: Planting herbaceous plants 12 in the water collection tank 1 not only has a filtering effect, but also can conceal sand and increase the thickness of the soil layer. The water in the water collection tank 1 is filtered by biological filtration to remove large particles, and then finely filtered through the filter assembly.

[0039] S3, treatment of unconventional water: the finely filtered water enters the water treatment component 5, undergoes biological or chemical treatment, and obtains water that meets the reuse standard;

[0040] S4. Reuse of unconventional water: The thickness of the soil layer is about 20 to 60 cm, and the lower layer of the soil layer is a pebble layer. According to the thickness of the soil layer, trenching is performed on the side of the water collection trough 1 to obtain a number of transplanting trenches 8. The trenching depth of the transplanting trench 8 is the same as the thickness of the soil layer. The water collection trough 1 is about 40.5 m away from the photovoltaic panel. The edge of the water collection trough 1 coincides with the transplanting trench 8, and shrubs 10 are planted on the transplanting trench 8. The transplanting trench 8 facilitates the accumulation of wind and sand, increases the thickness of the soil layer, and contributes to vegetation restoration and ecological environment protection. Shrubs 10 are selected to plant native plants such as runners or creeping roots and tuberous roots with strong resistance. The optimal fertilization plan is formulated according to factors such as soil texture and nutrient status to retain water with fertilizer, thereby achieving the purpose of saving water. The shrubs 10 are separated by water retaining ridges 11 , and the water collecting trough 1 is dug deeper from the side to the farthest point. The planting surface of the transplanting ditch 8 divided by the water retaining ridges 11 is an inclined surface with a certain inclination angle, which facilitates the irrigation water to stay between the water retaining ridges 11 .

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

[0042] The transplanting trenches 8 are connected by water pipes 9, which are connected by 300mm diameter PVC pipes, further reducing material consumption and costs. The water pipes 9 are arranged at one end of the transplanting trench 8 away from the water collecting tank 1, and are used to connect the water between the transplanting trenches 8 at the lowest point of the planting surface of the transplanting trench 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 be returned to the lowest planting surface of the adjacent or other transplanting trenches 8 through the water pipes 9. If the amount of water is large, it can still be returned to the higher planting surface, realizing the recycling of water resources and reducing water consumption.

[0043] In this embodiment, the unconventional water irrigation work for vegetation restoration is carried out relying on the 30MW photovoltaic power station in Jiaguguan, Gansu. The annual precipitation in the 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 thickness of the soil layer in the plant area is about 30cm, with pebbles and gravel below. There is no obvious wet soil in the 30cm surface soil, and the soil water content is extremely low. The width of the photovoltaic panel 4 is 400cm, and the water collection tank 1 is opened in the soil layer with a depth of 20cm. The width of the water collection tank 1 is about 50cm, and the length of the water collection tank 1 is basically the same as the length of the photovoltaic panel 4. The interval between the water retaining ridges 11 is about 50cm, and the collected rainwater is distributed to the transplanting ditch 8 that is artificially ditched to achieve irrigation of the shrubs 10, and the planting surface grows 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, combines ecological vegetation restoration planting technology and unconventional water recycling technology, and recycles and reuses unconventional water in photovoltaic plant areas through the "biological and physical water collection and reuse" method, which has significant economic, environmental and social benefits, and promotes 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 solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. An unconventional water-collecting sprinkler irrigation method for restoring vegetation in a photovoltaic plant area, characterized in that: The following steps are involved: S1. Collection of unconventional water: A water collection tank is opened under the edge of the photovoltaic panel. When the photovoltaic panel is cleaned or it rains, unconventional water enters the water storage tank through the water collection tank; S2. Filtration of unconventional water: Planting herbs in the water collection tank, removing large particles from the water collection tank through biological filtration, and then finely filtering through the filtration component; S3. Treatment of unconventional water: The finely filtered water enters the water treatment component for biological or chemical treatment to obtain water that meets the reuse standards; S4. Reuse of unconventional water: According to the thickness of the soil layer, trenches are dug on the side of the water collection tank to obtain several transplanting trenches. The transplanting trenches are connected by water pipes, and shrubs are planted in the transplanting trenches. The shrubs are separated by water retaining ridges, and the water obtained in S3 is used for shrub irrigation through the sprinkler assembly.

2. The unconventional water-collecting sprinkler irrigation method for restoring vegetation in a photovoltaic plant area according to claim 1 is characterized in that: In S4, the thickness of the soil layer is 20 to 60 cm, the lower layer of the soil layer is a pebble layer, and the trenching depth of the transplanting trench is the same as the thickness of the soil layer.

3. The unconventional water-collecting sprinkler irrigation method for restoring vegetation in a photovoltaic plant area according to claim 2 is characterized in that: In S4, the water collecting trough is dug deeper from the side to the farthest point, and the planting surface of the transplanting ditch divided by the water retaining ridge exists as a slope with a certain inclination angle.

4. The unconventional water-collecting sprinkler irrigation method for restoring vegetation in a photovoltaic plant area according to claim 3 is characterized in that: In S4, a water pipe is arranged at one end of the transplanting trench away from the water collecting trough, so as to interconnect the water between the transplanting trenches at the lowest point of the planting surface of the transplanting trench.

5. A device for restoring vegetation in a photovoltaic plant area using the unconventional water-collecting sprinkler irrigation method according to any one of claims 1 to 4, characterized in that: It comprises a water collecting tank and a water storage tank. The water collecting tank is connected with the water storage tank through a filtering component. A water treatment component is arranged in the water storage tank. The water storage tank is connected with the outside through a sprinkler irrigation component.

6. The unconventional water collection and sprinkler irrigation device for restoring vegetation in a photovoltaic plant area according to claim 5, characterized in that: A liquid level monitoring system is arranged in the water storage tank.

7. The unconventional water collection and sprinkler irrigation device for restoring vegetation in a photovoltaic plant area according to claim 5, characterized in that: The water collection tank is made of corrosion-resistant material and adopts a distributed design. It is arranged below the lower edge of the photovoltaic panel and around the photovoltaic equipment, and guides the unconventional water to the water storage tank through a dedicated pipeline.

8. The unconventional water collection and sprinkler irrigation device for restoring vegetation in a photovoltaic plant area according to claim 5, characterized in that: The sprinkler assembly is connected to a power supply device, and the power supply device adopts one or a combination of a photovoltaic panel or a battery.

9. The unconventional water collection and sprinkler irrigation device for restoring vegetation in a photovoltaic plant area according to claim 5, characterized in that: The water treatment component is one or a combination of a biological filter or a membrane filter.

10. The unconventional water collection and sprinkler irrigation device for restoring vegetation in a photovoltaic plant area according to claim 5, characterized in that: The filter assembly adopts a multi-stage filter.

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