Agricultural water quality circulation ecological restoration system

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By designing an ecological restoration system for agricultural water quality circulation, and using the combination of ecological interception canals, sedimentation tanks, filter dams and ecological purification ponds, the problems of water eutrophication and ecosystem imbalance caused by agricultural land pollution are solved, and efficient water quality purification and ecosystem restoration are achieved.

CN222846563UActive Publication Date: 2025-05-09SICHUAN NEW WATER BALANCE ENVIRONMENTAL PROTECTION TECH CO LTD

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Patent Information

Application Number: CN202420647411.9
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-04-01
Publication Date: 2025-05-09
Estimated Expiration: 2034-04-01

AI Technical Summary

Technical Problem

Due to pollution from pesticides, fertilizers and livestock and poultry farming, agricultural land has caused eutrophication of water bodies and imbalanced ecosystems, which endangers human and animal health and the environment.

Method used

An ecological restoration system for agricultural water quality circulation is designed, including ecological interception canals, sedimentation tanks, filtration dams and ecological purification ponds. Through the combination of grass bricks and water purification plants, multiple purification treatments are improved to improve the water quality purification effect.

Benefits of technology

Through multiple purification treatments, the purification effect of the receiving water body is significantly improved, the concentration of pollutants in the water body is reduced, the balance of the water ecosystem is restored, and the health and environment of humans and animals are protected.

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Abstract

The utility model discloses an agricultural water quality circulation ecological restoration system, which is used for introducing a receiving water body into a farmland for gradual purification treatment, and comprises an ecological interception channel and a sedimentation tank, a filter dam is connected between the sedimentation tank and an ecological purification pond, and the ecological purification pond is arranged behind the filter dam. The ecological purification pond is located in front of the receiving water body, and the two sides of the outer end of the ecological interception channel are connected with a first water inlet channel and a second water inlet channel correspondingly. The farmland is surrounded by the ecological interception channel, the channel surface of the ecological interception channel is lined by the grass-planting bricks, water purification plants such as watermifoil, water spinach, water lily and acorus calamus are planted by the grass-planting bricks to purify water in the farmland, returned water of the farmland enters the sedimentation tank to be settled, and the purified water is filtered by the filter dam. The water body entering the ecological purification pond is purified by multiple organisms, and the system purifies the receiving water body in a multiple purification mode, so that the purification effect is improved.

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Description

Technical Field

[0001] The utility model relates to the technical field of water purification, in particular to an agricultural water circulation ecological restoration system. Background Art

[0002] With the development of agriculture, the large-scale use of chemicals such as pesticides and fertilizers, as well as the expansion of livestock and poultry farming, the agricultural environment is facing serious pollution pressure. Contaminated topsoil with high concentrations of heavy metals easily enters the atmosphere and water bodies, leading to other secondary ecological and environmental problems such as air pollution, surface water pollution, groundwater pollution and ecosystem degradation. The large-scale application of fertilizers will also lead to an increase in the nitrogen and phosphorus content in the soil, which will then flow into rivers, seas, and lakes through rainfall, causing eutrophication of water bodies, rapid reproduction of algae, and destruction of the balance and stability of the aquatic ecosystem. In addition, agricultural pollution will cause pollutants to accumulate in crops and enrich them in humans and animals through the food chain, causing cancer and other diseases, endangering the health of humans and animals.

[0003] These pollution problems not only affect the benefits of agricultural production, but also cause serious harm to human health and the ecological environment. On the other hand, as people's awareness of environmental protection increases, the concepts of ecological restoration and ecological governance are gradually accepted and valued. People begin to realize that simple governance and restoration cannot fundamentally solve environmental problems. It is necessary to reduce pollution from the source and achieve sustainable ecological development.

[0004] Therefore, it is of great significance and value to carry out water quality recycling ecological restoration of polluted agricultural land. To this end, we propose an agricultural water quality recycling ecological restoration system to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide an agricultural water quality circulation ecological restoration system to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an agricultural water quality circulation ecological restoration system, which is used to introduce receiving water bodies into farmland for gradual purification treatment, including an ecological interception channel and a sedimentation tank, a filter dam is connected between the sedimentation tank and the ecological purification pond, an ecological purification pond is arranged behind the filter dam, and the ecological purification pond is located in front of the receiving water body, and the outer ends of the ecological interception channel are respectively connected to a first water inlet channel and a second water inlet channel on both sides.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Preferably, the ecological interception channel is arranged outside the farmland, the bottom and channel surface of the ecological interception channel are paved with anti-seepage geotextiles, and a settlement water stop joint is arranged on one side of the upper end of the ecological interception channel;

[0009] The channel surface of the ecological interception channel is lined with grass-planting bricks, and the grass-planting bricks are located on the upper side of the anti-seepage geotextile.

[0010] Preferably, the longitudinal section of the grass-planting brick is set to be trapezoidal, and the slope to length ratio of the grass-planting brick is 1:1.

[0011] Preferably, the sedimentation tank is located at the outer end of the ecological interception channel near the side of the sedimentation stop joint, and the cross section of the sedimentation tank is set to be rectangular, and a plurality of inlets are evenly arranged at one end of the long end of the sedimentation tank, and the inlets are connected to the ecological interception channel;

[0012] The other end of the sedimentation tank is provided with an outlet, which is arranged as an overflow weir.

[0013] Preferably, the length-to-width ratio of the sedimentation tank is 5:1, the effective water depth is 2.5 meters, and a sediment capture well is provided at the bottom of the sedimentation tank.

[0014] Preferably, a mud discharge pipe is fixed at the bottom of the mud capture well.

[0015] Preferably, the filter dam is set to be 5 meters wide and 4 meters long, and a filter layer is provided inside the filter dam, and the number of the filter layers is 5.

[0016] Preferably, the ecological purification pond is set to be 10 meters in length and 5 meters in width.

[0017] Preferably, the outlet end of the first water inlet channel is connected to the interior of the ecological interception channel, and the outlet end of the second water inlet channel is connected to the interior of the ecological interception channel;

[0018] Water inlet pipes are installed inside the first water inlet channel and the second water inlet channel. The bottom of the water inlet pipe is flush with the bottom of the water inlet channel, and the water inlet pipe is a PVC corrugated pipe.

[0019] Preferably, a pocket net is installed at the water inlet end of the water inlet pipe.

[0020] Beneficial Effects

[0021] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0022] The utility model surrounds the farmland by setting up an ecological interception channel, the channel surface of the ecological interception channel is lined with grass bricks, and water purification plants such as foxtail algae, water spinach, water lily, and calamus are planted with the grass bricks to purify the water quality in the farmland. The water from the farmland enters the sedimentation tank for sedimentation, and the filter dam filters the purified water. The water entering the ecological purification pond is purified by a variety of organisms. The system purifies the receiving water body through multiple purification methods, thereby improving the purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a system schematic diagram of the utility model.

[0024] In the figure: 1. Ecological interception channel; 11. First water inlet channel; 12. Second water inlet channel; 2. Sedimentation tank; 21. Bottom sediment capture well; 3. Filtration dam; 4. Ecological purification pond. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] An agricultural water quality circulation ecological restoration system comprises an ecological interception channel 1, a sedimentation tank 2, a filter dam 3 and an ecological purification pond 4.

[0027] Example 1

[0028] The ecological interception channel 1 is set outside the farmland, and the farmland is completely surrounded by the inner side of the ecological interception channel 1. The bottom and channel surface of the ecological interception channel 1 are paved with anti-seepage geotextiles, and the bottom of the ecological interception channel 1 is paved with porous expanded clay and gravel to reduce the scouring of soil by water flow and protect water and soil from erosion. At the same time, the porous expanded clay provides a larger surface area, which is suitable for the attachment and growth of microorganisms. These microorganisms can help decompose organic matter in the water, thereby reducing the concentration of pollutants.

[0029] The channel surface of the ecological interception channel 1 is lined with grass bricks, which are located on the upper side of the anti-seepage geotextile to improve the anti-seepage property of the bottom of the grass bricks. The longitudinal section of the grass bricks is trapezoidal, and the slope to length ratio is 1:1. Water purification plants such as foxtail algae, water spinach, water lily, and calamus are mainly planted on the grass bricks to purify the water quality in the farmland. A settlement water stop joint is provided on one side of the upper end of the ecological interception channel 1 to improve the stability and waterproof effect of the ecological interception channel 1. The outer surface of the settlement water stop joint is paved with gravel, pebbles and soil for planting irises and lilies to further improve the water purification effect, while also playing a role in bank consolidation and slope protection.

[0030] Example 2

[0031] The sedimentation tank 2 is arranged on the outer end of the ecological interception channel 1, near the side of the sedimentation stop joint. The sedimentation tank 2 is a water treatment facility that uses the sedimentation principle to remove suspended matter in the water. It belongs to the existing mature technology. The hydraulic retention time of the sedimentation tank 2 should generally be greater than 2 hours. The cross-section of the sedimentation tank 2 is rectangular, and multiple inlets are evenly arranged at one end of the pool length, and the inlet is connected to the ecological interception channel 1, so that the farmland drainage water flows into the sedimentation tank 2 from the ecological interception channel 1 through evenly distributed water inlet holes.

[0032] An outlet is provided at the other end of the length of the sedimentation tank 2. The outlet adopts an overflow weir to ensure that the clarified water after sedimentation in the sedimentation tank 2 can flow into the filter dam 3 evenly along the width of the tank. The overflow weir is a hydraulic structure used to control the water flow and maintain a certain water level. It belongs to the existing mature technology. The upstream side of the overflow weir is the weir front. The weir front is the place where the water flow is blocked and a higher water level is formed. A scum trough and a baffle are provided in the weir front to intercept the scum on the water surface. Among them, the length-to-width ratio of the sedimentation tank 2 is 5:1, and its effective water depth is 2.5 meters. A sludge capture well 21 is provided below the bottom of the sedimentation tank 2 to accumulate the precipitated sludge. A sludge discharge pipe is installed and fixed at the bottom of the sludge capture well 21 for regular sludge discharge. The sludge capture well 21 is a device for collecting and removing sludge from water bodies, which belongs to an existing technology in water body restoration projects.

[0033] Example 3

[0034] The filter dam 3 is connected between the sedimentation tank 2 and the ecological purification pond 4, and plays the role of regional division. The filter dam 3 is reinforced by the pond bottom and surrounded by a brick-concrete structure on the outside. Its external wall is built with hollow bricks. The direction of the holes of the hollow bricks is consistent with the direction of the water flow, so that the holes of the hollow bricks can provide a channel for the water flow. When the direction of the holes is consistent with the direction of the water flow, the speed of the water flow and the filtration efficiency can be improved.

[0035] There are 5 filter layers inside the filter dam 3. From bottom to top, each layer of filter material is volcanic rock, expanded clay, crushed stone, activated carbon and fine sand. The specifications of the filter dam 3 are 5 meters in width and 4 meters in length. A fine grid is fixed in front of the filter dam 3. The height of the fine grid is kept at the same level as the filter dam 3 to intercept floating objects on the water surface.

[0036] Example 4

[0037] The ecological purification pond 4 purifies the water body by utilizing a variety of organisms. The specifications of the ecological purification pond 4 are 10 meters in length and 5 meters in width. The ecological purification pond 4 is arranged after the filtration dam 3 and before the receiving water body. Various aquatic plants such as Vallisneria, Foxtail Algae, Potamogeton, Cattail, Water Celery, Canna, Water Lily and Calamus are planted in the ecological purification pond 4, and the aquatic plants cover more than 80% of the area to absorb nutrients such as nitrogen and phosphorus in the water body.

[0038] A small amount of filter-feeding aquatic animals such as silver carp, bighead carp, snails and clams are stocked in the biological purification pond to filter floating animals and plants in the water and absorb debris, organic matter, etc. in the water. The ecological purification pond 4 is mainly used for deep purification measures of low-concentration polluted water bodies. By constructing the physical quantity of a healthy pond system, the purification and buffering capacity of the pond system is greatly improved, and the water quality flowing into the receiving water body is further purified. The ecological purification pond 4 has the characteristics of good purification effect, strong nitrogen and phosphorus reduction capacity, low investment and low operating costs.

[0039] Example 5

[0040] One side of the outer end of the ecological interception channel 1 is connected to the first water inlet channel 11, and the other side is connected to the second water inlet channel 12. The first water inlet channel 11 receives the receiving water from the outside, and the outlet end of the first water inlet channel 11 is connected to the interior of the ecological interception channel 1, so that the first water inlet channel 11 can discharge the receiving water into the farmland. The second water inlet channel 12 is used to connect the ecological purification pond 4 with the farmland, and the outlet end of the second water inlet channel 12 is connected to the interior of the ecological interception channel 1, so that the drainage of the ecological purification pond 4 can enter the farmland through the second water inlet channel 12.

[0041] Water inlet pipes are installed inside the first water inlet channel 11 and the second water inlet channel 12. The water inlet pipes are made of PVC corrugated pipes. The bottom of the water inlet pipes is flush with the bottom of the water inlet channels, so that the drainage entering the first water inlet channel 11 and the second water inlet channel 12 can be transported through the drainage pipes. Pocket nets are installed at the water inlet ends of the water inlet pipes to prevent fish or other debris in the ecological purification pond 4 and the receiving water body from entering the water inlet pipes and causing blockage of the water inlet pipes. Water diversion gates can be installed at the water inlet ends of the first water inlet channel 11 and the second water inlet channel 12 to control the water flow through the water inlet pipes into the farmland. The water diversion gates can adopt the pre-buried PVC elbow pipe pulling method to improve the anti-leakage performance.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An agricultural water quality circulation ecological restoration system, used to introduce receiving water into farmland for gradual purification, characterized by: The invention comprises an ecological interception channel (1) and a sedimentation tank (2), wherein a filter dam (3) is connected between the sedimentation tank (2) and the ecological purification pond (4), an ecological purification pond (4) is arranged behind the filter dam (3), and the ecological purification pond (4) is located in front of the receiving water body, and the outer ends of the ecological interception channel (1) are respectively connected to a first water inlet channel (11) and a second water inlet channel (12).

2. The agricultural water quality circulation ecological restoration system according to claim 1 is characterized by: The ecological interception channel (1) is arranged outside the farmland, the bottom and channel surface of the ecological interception channel (1) are paved with anti-seepage geotextiles, and a settlement water stop joint is arranged on one side of the upper end of the ecological interception channel (1); The channel surface of the ecological interception channel (1) is lined with grass-planting bricks, and the grass-planting bricks are located on the upper side of the anti-seepage geotextile.

3. The agricultural water quality circulation ecological restoration system according to claim 2 is characterized by: The longitudinal section of the grass-planting brick is set to be trapezoidal, and the slope-to-length ratio of the grass-planting brick is 1:

1.

4. The agricultural water quality circulation ecological restoration system according to claim 1 is characterized by: The sedimentation tank (2) is located at the outer end of the ecological interception channel (1) near the sedimentation stop joint, and the cross section of the sedimentation tank (2) is set to be rectangular. A plurality of inlets are evenly arranged at one end of the sedimentation tank (2), and the inlets are connected to the ecological interception channel (1); The other end of the sedimentation tank (2) is provided with an outlet, which is configured as an overflow weir.

5. The agricultural water quality circulation ecological restoration system according to claim 1 is characterized by: The length-to-width ratio of the sedimentation tank (2) is 5:1, the effective water depth is 2.5 meters, and a bottom mud capture well (21) is provided at the bottom of the sedimentation tank (2).

6. The agricultural water quality circulation ecological restoration system according to claim 5 is characterized by: A mud discharge pipe is fixed at the bottom of the mud capture well (21).

7. The agricultural water quality circulation ecological restoration system according to claim 1 is characterized by: The filter dam (3) is configured to have a width of 5 meters and a length of 4 meters. A filter layer is provided inside the filter dam (3), and the number of the filter layers is 5.

8. The agricultural water quality circulation ecological restoration system according to claim 1 is characterized by: The ecological purification pond (4) is configured to be 10 meters in length and 5 meters in width.

9. The agricultural water quality circulation ecological restoration system according to claim 1 is characterized by: The water outlet end of the first water inlet channel (11) is connected to the interior of the ecological interception channel (1), and the water outlet end of the second water inlet channel (12) is connected to the interior of the ecological interception channel (1); The first water inlet channel (11) and the second water inlet channel (12) are both equipped with water inlet pipes, the bottom of the water inlet pipes is flush with the bottom of the water inlet channels, and the water inlet pipes are PVC corrugated pipes.

10. The agricultural water quality circulation ecological restoration system according to claim 9, characterized in that: A pocket net is installed at the water inlet end of the water inlet pipe.