River water ecological restoration device

Abstract

A riverway water ecological restoration device comprises a filtering unit, the water outlet end of the filtering unit is connected with a flow guide channel, the other end of the flow guide channel is connected with a composite ecological unit, the composite ecological unit comprises a closed enclosing wall with an upward opening, floating island bodies, a floating plate and a biological carrier, and the multiple floating island bodies are arranged in the enclosing wall; a floating plate is detachably arranged on the floating island main body, and a plurality of biological carriers are suspended at the bottom of the floating plate. According to the utility model, high-efficiency filtration of river water can be improved through the three composite filter layers, blockage can be prevented through back flushing, a foundation is laid for follow-up repair, then, through triple effects of zeolite adsorption, plant absorption and microbial degradation, the removal rate of ammonia nitrogen in the river water is improved by 30%-50% compared with that in the traditional process, the removal rate of COD is improved to 75%, and the removal rate of ammonia nitrogen in the river water is improved by 30%-50% compared with that in the traditional process. And finally, the dissolved oxygen detector 5 can detect and feed back a control signal in real time, the operation time of the aeration mechanism can be controlled, dynamic adjustment is carried out in a linkage manner, the aeration energy consumption is reduced, and the remediation effect is better.

Description

Technical Field

[0001] This utility model relates to the field of water ecological environment restoration technology, and specifically designs a river water ecological restoration device. Background Technology

[0002] With the acceleration of urbanization, river water pollution has become increasingly prominent. Traditional aquatic ecological restoration technologies mainly rely on single physical filtration (such as bar screens and filters) or simple plant purification (such as planting single emergent plants), which have the following drawbacks:

[0003] 1. Low filtration efficiency: Physical filter materials (such as ordinary sand and brushes) can only intercept suspended solids and have a weak adsorption capacity for soluble pollutants such as nitrogen and phosphorus.

[0004] 2. Unstable ecosystem: The plant purification system lacks structural design, and the synergistic effect between plant roots and microorganisms is insufficient;

[0005] 3. High energy consumption for dissolved oxygen control: Dissolved oxygen regulation relies on manual intervention or fixed aeration, and cannot be dynamically adjusted according to the real-time oxygen content of the water body, resulting in high energy consumption and large fluctuations in the remediation effect. Utility Model Content

[0006] To overcome the above-mentioned defects, the present invention adopts the following technical solution:

[0007] A river water ecological restoration device includes a filtration unit located at the upstream inlet of the river. The outlet of the filtration unit is connected to a diversion channel, and the other end of the diversion channel is connected to a composite ecological unit. The composite ecological unit includes an upward-facing enclosed wall, floating island bodies, floating plates, and biological carriers. Multiple floating island bodies are arranged inside the wall and are assembled from the floating island bodies. Floating plates are detachably installed on the floating island bodies. Several biological carriers are suspended from the bottom of the floating plates. A micro-ecological chamber is also arranged in the middle of the floating plates. Multiple dissolved oxygen detectors are also arranged at the bottom of the micro-ecological chamber. An aeration mechanism is also arranged on the micro-ecological chamber, and the bottom of the aeration mechanism is lower than the bottom of the floating plates.

[0008] Preferably, the filter unit is filled with a composite filter layer, which has a three-layer structure, including a gravel layer, a zeolite layer and an activated carbon layer, and is divided into the gravel layer, the zeolite layer and the activated carbon layer from bottom to top.

[0009] Preferably, the bottom of the filter unit is also provided with a differential pressure sensor and a backwash pipe, and the backwash pipe is also provided with multiple spray outlets and is also connected to an external water pump.

[0010] Preferably, the floating island body is formed by connecting multiple hollow polyethylene tubes together with connecting sleeves, and each hollow polyethylene tube has a baffle fixedly installed on its inner side, and the baffle has multiple threaded holes.

[0011] Preferably, a floating plate is detachably installed on multiple baffles by screws. Multiple planting holes are opened on the upper surface of the floating plate. The planting holes are used to plant pollution-tolerant plants, including but not limited to reeds, cattails, calamus, and duckweed.

[0012] Preferably, the bottom of the float is further suspended by multiple biological carriers via nylon ropes. The biological carriers include natural carriers and biomimetic carriers. The natural carriers include, but are not limited to, corn cobs, wood chips, bamboo charcoal, and straw. The biomimetic carriers include, but are not limited to, polypropylene fiber biomimetic aquatic plants, polyester fiber nets, and glass fiber nets.

[0013] Preferably, the microbial membrane is also provided inside the microecological chamber, and the aeration mechanism partially passes through the biofilm.

[0014] Preferably, the aeration mechanism includes an air inlet pipe, a compressor, a main air duct, a dry air duct, and microporous aerators. The compressor is installed inside the micro-ecological chamber. The compressor is connected to the air inlet pipe, and part of the air inlet pipe extends out of the micro-ecological chamber. The output end of the compressor is connected to the main air duct, and the main air duct is also connected to the dry air duct. Multiple microporous aerators are installed on the dry air duct.

[0015] Preferably, the dry air duct is a closed annular structure and is located at the bottom of the micro-ecological chamber.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention enhances the efficiency of river water filtration through a three-layer composite filter layer, and prevents clogging through backwashing, laying the foundation for subsequent remediation. Secondly, through the triple action of zeolite adsorption, plant absorption, and microbial degradation, the ammonia nitrogen removal rate in river water is increased by 30%-50% compared to traditional processes, and the COD removal rate is increased to 75%. Finally, the dissolved oxygen detector 5 can detect and provide feedback control signals in real time, controlling the operating time of the aeration mechanism and making dynamic adjustments in a coordinated manner, reducing the energy consumption of the aeration process, and minimizing fluctuations in the remediation effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a river water ecological restoration device.

[0019] Figure 2 A top-view structural diagram of a river water ecological restoration device;

[0020] Figure 3 This is a schematic diagram of the internal structure of the filter unit;

[0021] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure along line AA;

[0022] Figure 5 for Figure 4 Enlarged structural diagram of section B in the middle;

[0023] In the diagram: Filter unit 1, diversion channel 2, composite ecological unit 3, enclosure wall 30, floating island main body 31, floating plate 32, biological carrier 33, micro-ecological chamber 4, dissolved oxygen detector 5, aeration mechanism 6, composite filter layer 10, gravel layer 101, zeolite layer 102, activated carbon layer 103, differential pressure sensor 11, backwash pipe 12, connecting sleeve 13, baffle 310, screw 311, planting hole 320, nylon rope 330, microbial film 40, air inlet pipe 60, compressor 61, main air duct 62, dry air duct 63, and microporous aerator 64. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1:

[0026] Reference Figure 1-5 ,

[0027] A river water ecological restoration device includes a filtration unit 1, which is located at the upstream inlet of the river. The filtration unit 1 is typically a rectangular or cylindrical pool. The outlet of the filtration unit 1 is connected to a diversion channel 2, and the other end of the diversion channel 2 is connected to a composite ecological unit 3. The composite ecological unit 3 is mainly used for river water restoration. The composite ecological unit 3 includes an upward-facing enclosed wall 30, floating island bodies 31, floating plates 32, and biological carriers 33. Multiple floating island bodies 31 are arranged inside the wall 30, and these floating island bodies 31 are assembled to flexibly form circular, hexagonal, or other enclosed shapes. The floating island bodies 31 are detachable. A floating plate 32 is installed, which can be replaced periodically. Several biological carriers 33 are suspended from the bottom of the floating plate 32. A micro-ecological chamber 4 is also installed in the middle of the floating plate 32. The micro-ecological chamber 4 is mainly used to promote the stable growth of microbial film (thickness 0.2-0.5mm), reduce water flow disturbance, and prolong water retention. Multiple dissolved oxygen detectors 5 are also installed at the bottom of the micro-ecological chamber 4. The dissolved oxygen detectors 5 are used to detect the DO data in the river water in real time and feed it back to the external control terminal. The external control terminal will control the aeration mechanism 6 to work. The aeration mechanism 6 is also installed on the micro-ecological chamber 4, and the bottom of the aeration mechanism 6 is lower than the bottom of the floating plate 32.

[0028] See Figure 3 The filter unit 1 is filled with a composite filter layer 10, which has a three-layer structure. The water flow in the river passes through the composite filter layer 10 from left to right. The composite filter layer 10 includes a gravel layer 101, a zeolite layer 102, and an activated carbon layer 103, and is divided from bottom to top into the following layers: gravel layer 101, zeolite layer 102, and activated carbon layer 103.

[0029] Gravel layer (particle size 20-30mm, thickness 30cm): intercepts large suspended particles (particle size > 2mm), extending the life of the middle layer material;

[0030] Zeolite layer (particle size 5-10 mm, thickness 50 cm): Utilizing its porous structure and cation exchange properties, it efficiently adsorbs ammonia nitrogen (NH4). + -N removal rate ≥60%, which is 30%-50% higher than that of ordinary sand and gravel;

[0031] Activated carbon layer (particle size 3-5mm, thickness 20cm): assists in adsorbing organic matter (COD removal rate ≥40%) and odor substances, making up for the limitations of single filter media functions.

[0032] The bottom of the filter unit 1 is also equipped with a differential pressure sensor 11 and a backwash pipe 12, and the backwash pipe 12 is also equipped with multiple spray outlets. The backwash pipe 12 is also connected to an external water pump. When the composite filter layer 10 is clogged, the differential pressure sensor 11 feeds back a differential pressure signal, and the external control terminal will control the external water pump to start automatically. The composite filter layer 10 is backwashed through the spray outlets on the backwash pipe 12. The backwash water flow rate is 2-3 times the original water flow rate and lasts for 10-15 minutes, which solves the problem of clogging of the composite filter layer 10. One cleaning cycle is 30-45 days, which can reduce the clogging of the composite filter layer 10 and improve the filtration efficiency.

[0033] River water enters the enclosure 30 through the filter unit 1 and the diversion channel 2. The floating island body 31 is formed by connecting multiple polyethylene hollow tubes with connecting sleeves 13. The floating island body 31 can be arranged in different sizes or shapes so that it can float on the river water. Each polyethylene hollow tube has a baffle 310 fixedly installed on its inner side. The baffle 310 is mainly used to support the floating plate 32. Multiple threaded holes are opened on the baffle 310, and the threaded holes are engaged with screws 310.

[0034] Multiple baffles 310 are detachably mounted with floating plates 32 by screws 311. Multiple planting holes 320 are opened on the upper surface of the floating plates 32. The planting holes (15cm in diameter and 30cm apart) are used to plant pollution-tolerant plants such as reeds, cattails, sweet flag, or duckweed (root length ≥80cm). The plants absorb nitrogen and phosphorus through their roots (TN removal rate 20%, TP removal rate 15%) and secrete allelochemicals to inhibit algae reproduction.

[0035] The bottom of the floating plate 32 is also suspended by multiple biological carriers 33 via nylon ropes 330. The nylon ropes 330 (diameter 2mm, tensile strength ≥50N) suspend the biological carriers in a ring layout (enclosing diameter 3-5m). The biological carriers 33 include natural carriers and biomimetic carriers. The natural carriers include, but are not limited to, corn cobs, sawdust, bamboo charcoal and straw. The biomimetic carriers include, but are not limited to, polypropylene fiber biomimetic aquatic plants, polyester fiber mesh and glass fiber mesh. The biological carriers 33 can adsorb a large number of microorganisms, which can expand the repair area and simultaneously combine with the planting holes 320 to improve the synergistic effect between plant roots and microorganisms.

[0036] The bottom of the micro-ecological chamber 4 is generally submerged in the river water, and a microbial film 40 is installed inside. The microbial film 40 can grow stably, which can increase the repair area. The aeration mechanism 6 partially passes through the biofilm 40.

[0037] See Figure 4-5 The aeration mechanism 6 includes an air inlet pipe 60, a compressor 61, a main air duct 62, a dry air duct 63, and microporous aerators 64. The compressor 61 is installed inside the micro-ecological chamber 4. Generally, the compressor 61 has a power of 1.5-3kW and an oxygenation efficiency ≥2.0kgO2 / (kW·h). The air inlet pipe 60 extends above the water surface, compressing air through the compressor 61 into the main air duct 62, and then transmitting it to the microporous aerators 64 via the dry air duct 63. The microporous aerators 64 continuously supply oxygen and prevent backflow of river water, thus promoting water circulation. The compressor 61 is connected to the air inlet pipe 60, and part of the air inlet pipe 60 extends out of the micro-ecological chamber 4. The output end of the compressor 61 is connected to the main air duct 62, which is also connected to the dry air duct 63. Multiple microporous aerators 64 are installed on the dry air duct 63.

[0038] The dry air channel 63 is a closed ring structure and is located at the bottom of the micro-ecological chamber 4, which allows the air bubbles to be evenly filled into the river water. The dissolved oxygen detector 5 at the bottom can detect the oxygen content in the river water in real time. When the DO in the river water is ≥3mg / L, the aeration mechanism 6 continues to aerate until the DO is ≥4mg / L and then shuts off. The optimal threshold is DO ≥4mg / L.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A river water ecological restoration device, characterized in that, The system includes a filtration unit (1) located at the upstream inlet of the river. The outlet of the filtration unit (1) is connected to a diversion channel (2), and the other end of the diversion channel (2) is connected to a composite ecological unit (3). The composite ecological unit (3) includes an upward-facing enclosed wall (30), a floating island body (31), a floating plate (32), and biological carriers (33). Multiple floating island bodies (31) are arranged inside the wall (30), and the floating island bodies (31) are spliced ​​together. Floating plates (32) are detachably arranged on the floating island bodies (31). Several biological carriers (33) are suspended at the bottom of the floating plates (32). A micro-ecological chamber (4) is also arranged in the middle of the floating plates (32). Multiple dissolved oxygen detectors (5) are also arranged at the bottom of the micro-ecological chamber (4). An aeration mechanism (6) is also arranged on the micro-ecological chamber (4), and the bottom of the aeration mechanism (6) is lower than the bottom of the floating plate (32).

2. The river water ecological restoration device according to claim 1, characterized in that, The filter unit (1) is filled with a composite filter layer (10), which has a three-layer structure, including a gravel layer (101), a zeolite layer (102) and an activated carbon layer (103), and is divided into a gravel layer (101), a zeolite layer (102) and an activated carbon layer (103) from bottom to top.

3. The river water ecological restoration device according to claim 1, characterized in that, The bottom of the filter unit (1) is also provided with a differential pressure sensor (11) and a backwash pipe (12), and the backwash pipe (12) is also provided with multiple spray outlets. The backwash pipe (12) is also connected to an external water pump.

4. The river water ecological restoration device according to claim 1, characterized in that, The floating island body (31) is formed by connecting multiple polyethylene hollow tubes together with connecting sleeves (13), and each polyethylene hollow tube is fixedly provided with a baffle (310) on its inner side, and the baffle (310) has multiple threaded holes.

5. The river water ecological restoration device according to claim 4, characterized in that, A floating plate (32) is detachably installed on the baffle (310) by screws (311). Multiple planting holes (320) are opened on the upper surface of the floating plate (32). The planting holes (320) are used to plant pollution-resistant plants, including but not limited to reeds, cattails, calamus and duckweed.

6. The river water ecological restoration device according to claim 5, characterized in that, The bottom of the float (32) is also suspended by multiple biological carriers (33) via nylon ropes (330). The biological carriers (33) include natural carriers and biomimetic carriers. The natural carriers include, but are not limited to, corn cobs, wood chips, bamboo charcoal and straw. The biomimetic carriers include, but are not limited to, polypropylene fiber biomimetic aquatic plants, polyester fiber nets and glass fiber nets.

7. The river water ecological restoration device according to claim 1, characterized in that, The microbial membrane (40) is also provided inside the microbial cabin (4), and the aeration mechanism (6) partially passes through the biofilm (40).

8. The river water ecological restoration device according to claim 7, characterized in that, The aeration mechanism (6) includes an air inlet pipe (60), a compressor (61), a main air duct (62), a dry air duct (63), and microporous aerators (64). The compressor (61) is installed inside the micro-ecological chamber (4). The compressor (61) is connected to the air inlet pipe (60), and part of the air inlet pipe (60) extends out of the micro-ecological chamber (4). The output end of the compressor (61) is connected to the main air duct (62). The main air duct (62) is also connected to the dry air duct (63). Multiple microporous aerators (64) are installed on the dry air duct (63).

9. The river water ecological restoration device according to claim 8, characterized in that, The dry air duct (63) is a closed ring structure and is located at the bottom of the micro-ecological chamber (4).

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