River channel rapid purification ecological circulation system

Abstract

The invention relates to a riverway rapid purification ecological circulation system which comprises a filtering structure, the filtering structure comprises a supporting frame fixedly supported on a riverway, and a plurality of filtering units extending into a riverway water body are distributed on the supporting frame at intervals; the angle of the plate-shaped filtering unit can be adjusted relative to the supporting frame; the ecological floating bed comprises a plurality of floating plates which are detachably connected, grooves for placing green plant pots are formed in the floating plates, and vertically-through penetrating holes are formed in the bottoms of the grooves; connecting parts are arranged at the four corners of each ecological floating bed, the adjacent ecological floating beds are connected through connecting pieces, and the floating plates are fixedly connected with the bottom of the river channel through connecting ropes so that the ecological floating beds can float on the river channel; the aeration device is laid at the bottom of the riverway; the angle of the filtering structure can be adjusted, and when the water flow of the river channel is large, the face plate of the filtering unit and the flow direction of the river are the same, so that the river water is discharged; and when the river flow is small, the plate surface of the filtering unit is vertical to the river flow direction so as to filter the river water of the river.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental protection, and in particular relates to a river rapid purification ecological circulation system. Background Art

[0002] The main reason why urban rivers are black and smelly is that excessive pollution in the river water leads to an imbalance between oxygen consumption and oxygen demand in the water body. Under these conditions, pollutants are converted into malodorous substances such as ammonia nitrogen, hydrogen sulfide, volatile organic acids, and black substances such as iron and manganese sulfides. The rivers flowing through the city bear the functions of urban sewage and flood discharge. Every day, a large amount of biological sewage, industrial wastewater and rainwater containing pollutants are discharged into the river, causing the ecological deterioration of the river water body and the formation of black and smelly rivers, which have an impact on the health of urban residents and the urban environment, and have become a stubborn problem that is difficult to solve in urban environmental protection work.

[0003] In the prior art, methods for treating sewage in rivers include: introducing river sewage into functional bodies such as wetlands or ecological shorelines through corresponding means, treating polluted water bodies and precipitation and runoff through wetlands, ecological shorelines, and other purification functional bodies; reducing the organic matter content in water bodies and reducing the amount of silt; transferring new water bodies to replenish waterways, lakes, etc.; controlling endogenous pollution, restoring the nutrient structure of water bodies through microbial complex bacteria, and stabilizing or rebuilding the ecosystem and food chain structure.

[0004] Traditional treatment methods have certain defects: First, the runoff method of treating polluted water and precipitation through wetlands, ecological shorelines, and other purification functional bodies occupies a large area and requires a certain area of ​​vacant land for treatment. In addition, the diversion project is relatively complex to construct, difficult to operate, and costly. In some sewage treatment sections, the above conditions are not met; secondly, the method of reducing the organic matter content and sludge reduction in water bodies is difficult to operate, and requires the coordination of a variety of chemical treatment methods, which is relatively expensive, and requires the consumption of a large amount of chemical raw materials and the use of large-scale mechanical equipment. The final treatment effect is not ideal and may even cause secondary pollution; the method of transferring new water bodies into waterways and lakes wastes a lot of clean water resources, and the replenishment amount is relatively large, which cannot fundamentally implement effective treatment of pollution sources; the method of treatment through microbial composite bacteria has a long treatment time and a small treatment range. It has certain effects on the treatment of non-flowing sewage, but has little effect on the treatment of flowing rivers.

[0005] Traditional sewage treatment equipment and methods have defects such as high cost, unclear effect, narrow treatment range, serious waste of resources and strong restrictions. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a river rapid purification ecological circulation system to solve the technical problems of high cost and unclear effect of sewage treatment equipment and methods in the prior art.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the river rapid purification ecological circulation system of the present invention is: A river rapid purification ecological circulation system, comprising: A filtration structure is arranged upstream of the river channel, and the filtration structure comprises a support frame fixedly supported on the river channel, and a plurality of filtration units extending into the water body of the river channel are arranged at intervals on the support frame; The filter unit is plate-shaped, and the angle of the filter unit can be adjusted relative to the support frame; When the water flow in the river is large, the plate surface of the filter unit is in the same direction as the flow, so that the river water can be discharged; When the water flow in the river is small, the plate surface of the filter unit is perpendicular to the flow direction to filter the river water; The filter unit includes a stone filter layer and an activated carbon block layer arranged vertically on the plate surface; The ecological floating bed is arranged downstream of the filtering structure. The ecological floating bed includes a plurality of detachably connected floating plates. The floating plates are provided with grooves for placing green plant pots. The bottom of the grooves is provided with through holes that penetrate from top to bottom. Connecting parts are arranged at the four corners of the ecological floating bed. Adjacent ecological floating beds are connected by connecting pieces. The floating plates are fixedly connected to the bottom of the river channel by connecting ropes so that the ecological floating bed floats on the river channel. The aeration device is installed downstream of the ecological floating bed and is laid on the bottom of the river to supply oxygen to the river water.

[0008] Beneficial effects: The ecological circulation system for rapid purification of a river channel of the present invention includes a filtering structure, an ecological floating bed and an aeration device. The filtering structure includes a gravel filtering layer and an activated carbon block layer, which can perform preliminary filtration on the river water; the setting of the ecological floating bed can achieve the purpose of purifying the water body by planting green plants on the ecological floating bed, and the green plants absorb inorganic substances in the water body through the green plants. In addition, the setting of the aeration device can ensure the oxygen supply to the water body in the river channel; in addition, the filtering structure in the present invention can be adjusted in angle. When the water flow in the river channel is large, the panel of the filtering unit is in the same direction as the river flow to allow the river water to discharge; when the water flow in the river channel is small, the panel of the filtering unit is perpendicular to the river flow to filter the river water in the river channel to avoid the setting of the filtering unit affecting the normal discharge of the river.

[0009] Furthermore, a bottom plate is arranged at the bottom of the river channel, the bottom of the filter unit is hingedly connected to the bottom plate, two connecting rods extending in the up-down direction are symmetrically fixed above the filter unit, and a guide groove for the connecting rods to pass through is arranged on the support frame; the two connecting rods pass through the guide groove upward, and a limiting structure is arranged on the two connecting rods so that the filter unit is hung on the support frame; A cross bar is fixed at the top of the two connecting rods, a vertical bar is fixed in the middle of the cross bar in its extension direction, the lower end of the vertical bar extends to the support frame and is rotatably arranged relative to the support frame, a gear is fixed to the upper end of the vertical bar, and a rack meshing with the gear is arranged on the support frame. The gear and the rack are transmitted to achieve angle adjustment of the filter unit.

[0010] Beneficial effects: The meshing of the gear and the rack can facilitate the angle adjustment of the filter unit, and the structural setting of the above-mentioned filter structure can meet the requirements of the filter unit being rotatably set on the support frame and the angle adjustment of the filter unit.

[0011] Furthermore, the guide groove is an arc with the vertical rod axis as the center and the distance between the vertical rod and the connecting rod as the radius. Each filter unit corresponds to two guide grooves, and the two guide grooves are symmetrical about the projection center of the vertical rod axis on the horizontal plane.

[0012] Beneficial effect: The setting of the guide groove can limit the rotation of the connecting rod, thereby ensuring the stability of the connecting rod during the rotation process.

[0013] Furthermore, the central angle of the guide groove is 90°, and each filter unit has two guide grooves corresponding to it, which are a first guide groove and a second guide groove arranged front to back.

[0014] When one connecting rod of the filter unit is located at the rear end of the first guide groove and the other connecting rod is located at the front end of the second guide groove, the plate surface of the filter unit is perpendicular to the flow direction; When one connecting rod of the filter unit is located at the front end of the first guide groove and the other connecting rod is located at the rear end of the second guide groove, the plate surface of the filter unit is parallel to the flow direction.

[0015] Beneficial effect: By setting the center angle of the guide groove, it is possible to ensure that the filter unit is in a state where the plate surface of the filter unit is perpendicular to the flow direction or the plate surface of the filter unit is parallel to the flow direction.

[0016] Furthermore, the filtering structure includes a limiting structure arranged on the support frame for clamping and limiting the connecting rod, and each filter unit is correspondingly provided with four groups of limiting structures. The limiting structure clamps the connecting rod at the end of the guide groove so that the filter unit is in a state where the plate surface of the filter unit is perpendicular to the flow direction or the plate surface of the filter unit is parallel to the flow direction.

[0017] Beneficial effect: The setting of the limiting structure can keep the filter unit in a state where the plate surface of the filter unit is perpendicular to the flow direction or the plate surface of the filter unit is parallel to the flow direction.

[0018] Furthermore, the limiting structure includes a pair of fixed plates fixedly connected relative to the support frame, a clamping plate is slidingly provided on the opposite sides of the fixed plates, a telescopic structure is fixed to the support frame, the clamping plate is fixedly connected to the telescopic structure, and when the clamping plate is extended, the limiting rod is clamped and limited.

[0019] Beneficial effects: The limiting structure can clamp the connecting rod and the structural setting of the limiting structure is reasonable.

[0020] The floating plate is provided with four vertically penetrating long holes evenly distributed in the circumferential direction of the groove, and a rope passing groove is arranged between the long holes and the edge of the floating plate.

[0021] Beneficial effect: The arrangement of the long holes facilitates the connection and fixation of the connecting rope.

[0022] Furthermore, the connecting part is a support plate arranged at the four corners of the floating plate, the thickness of the support plate is less than the thickness of the floating plate, and a connecting hole is opened on the support plate. The connecting member includes a circular plate structure, and the circular plate structure has through holes corresponding to the connecting holes of the support plate. The connecting member also includes bolts that pass through the connecting holes and the through holes in sequence.

[0023] Beneficial effects: The connection part structure is reasonably arranged and is convenient for fixed connection with the connection piece.

[0024] The aeration device comprises a main pipeline and an air distribution pipe laid at the bottom of the river channel, and the main pipeline and the air distribution pipe are connected through a connecting pipe.

[0025] Beneficial effect: From the main pipeline to the gas distribution pipe, the gas can be evenly distributed on the bottom of the river.

[0026] Furthermore, the gas distribution pipe includes a plurality of horizontal pipes arranged at intervals and vertical pipes connected to the horizontal pipes, the horizontal pipes and the vertical pipes form a horizontal pipe network, and the connecting pipe is connected to the vertical pipe.

[0027] Beneficial effect: The structure of the air distribution pipe is reasonably set. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of a filtering structure (without showing the limiting structure) of a river rapid purification ecological circulation system of the present invention; Figure 2 It is a top view of a filtering structure of a river rapid purification ecological circulation system of the present invention; Figure 3 yes Figure 2 A schematic diagram of the structure of the limiting structure of the filtering structure; Figure 4 yes Figure 3 A schematic diagram of the structure of the fixing plate and the clamping plate of the limiting structure; Figure 5 yes Figure 1 A cross-sectional view of the filter unit; Figure 6 It is a structural diagram of the ecological floating bed; Figure 7 It is a structural schematic diagram of a floating plate in a structural floating bed; Figure 8 is a cross-sectional view of the floating plate; Fig. 9 It is the installation diagram of the aeration device; Fig.10 It is a schematic diagram of the structure of the air distribution pipe in the aeration device.

[0029] Figure numerals: 1-support frame; 2-filter unit; 3-bottom plate; 4-connecting rod; 5-limiting ring; 6-cross bar; 7-vertical rod; 8-gear; 9-rack; 10-first guide groove; 11-second guide groove; 12-positioning structure; 13-fixed plate; 14-dovetail groove; 15-clamping plate; 16-slider; 17-electric telescopic rod; 18-activated carbon block layer; 19-floating plate; 20-groove; 21-long hole; 22-rope groove; 23-perforation; 24-support plate; 25-through hole; 26-connecting pipe; 27-air distribution pipe; 28-cross pipe; 29-vertical pipe; 30-aeration head; 31-stone filter layer; 32-aerator; 33-connecting hose; 34-main pipeline. DETAILED DESCRIPTION

[0030] The following is a further detailed description of a river rapid purification ecological circulation system of the present invention in conjunction with the accompanying drawings and specific embodiments: The present invention discloses an ecological circulation system for rapid purification of a river channel, comprising a filtering structure arranged upstream of the river channel, an ecological floating bed arranged downstream of the filtering structure, and an aeration device arranged downstream of the ecological floating bed, so as to purify the river water in the river channel. The filtering structure comprises a support frame 1 fixedly supported on the river channel, the support frame 1 is arranged across the river surface, and a plurality of filtering units 2 extending into the river channel water body are arranged at intervals on the support frame 1. The filtering unit 2 is plate-shaped, and comprises a gravel filtering layer 31 and an activated carbon block layer 18 arranged vertically on the plate surface. The river water enters the gravel filtering layer 31, and enters the activated carbon block layer 18 after being filtered by the gravel filtering layer 31. The river water is filtered and purified by the gravel filtering layer 31 and the activated carbon block layer 18. The gravel filtering layer 31 filters the flocculent suspended matter and solid pollutants in the river water, and the particulate suspended pollutants in the river water are adsorbed again by the activated carbon block layer 18.

[0031] In this embodiment, the filter unit 2 can be adjusted at an angle relative to the support frame 1. When the water flow in the river is large, the plate surface of the filter unit 2 is in the same direction as the flow to allow the river water to flow out; when the water flow in the river is small, the plate surface of the filter unit 2 is perpendicular to the flow to filter the river water.

[0032] Specifically, a bottom plate 3 is arranged at the bottom of the river channel, and the bottom plate 3 is arranged perpendicular to the river channel. The bottom of the filter unit 2 is hingedly connected to the bottom plate 3, and the hinge axis between the filter unit 2 and the bottom plate 3 is arranged in the middle of the bottom edge of the filter unit 2. Two connecting rods 4 extending in the up-down direction are symmetrically fixed above the filter unit 2, and a guide groove for the connecting rods 4 to pass through is arranged on the support frame 1; the two connecting rods 4 pass through the guide groove upward, and a limiting structure is arranged on the two connecting rods 4 so that the filter unit 2 is hung on the support frame 1. In this embodiment, the limiting structure is a limiting retaining ring 5 arranged on the connecting rod 4, and two limiting retaining rings 5 ​​are arranged at intervals above and below, so that the limiting retaining ring 5 and the guide groove are blocked and limited, so that the filter unit 2 is limited in the up-down direction relative to the support frame 1.

[0033] A cross bar 6 is fixed to the top of the two connecting rods 4, and a vertical bar 7 is fixed to the middle of the cross bar 6 in its extension direction. The lower end of the vertical bar 7 extends to the support frame 1 and is rotatably arranged relative to the support frame 1. A gear 8 is fixed to the upper end of the vertical bar 7. A rack 9 meshing with the gear 8 is arranged on the support frame 1. The gear 8 and the rack 9 are transmitted to achieve angle adjustment of the filter unit 2. In this embodiment, one end of the rack 9 is provided with a driving device for driving it to move back and forth in a straight line. The driving device is a hydraulic cylinder. The connection and transmission between the hydraulic cylinder and the rack 9 are prior art and will not be repeated here.

[0034] In this embodiment, the guide groove is an arc centered on the axis of the vertical rod 7 and with the distance between the vertical rod 7 and the connecting rod 4 as the radius, and the central angle of the guide groove is 90°; each filter unit 2 corresponds to two guide grooves, and the two guide grooves are symmetrical about the projection center of the axis of the vertical rod 7 on the horizontal plane. Each filter unit 2 corresponds to two guide grooves, which are the first guide groove 10 and the second guide groove 11 arranged front and back, and the two connecting rods 4 are respectively located in the first guide groove 10 and the second guide groove 11, and can be guided and moved in the guide groove. When one connecting rod 4 of the filter unit 2 is located at the rear end of the first guide groove 10 and the other connecting rod 4 is located at the front end of the second guide groove 11, the plate surface of the filter unit 2 is perpendicular to the flow direction; when one connecting rod 4 of the filter unit 2 is located at the front end of the first guide groove 10 and the other connecting rod 4 is located at the rear end of the second guide groove 11, the plate surface of the filter unit 2 is parallel to the flow direction.

[0035] In order to fix the filter unit 2, in this embodiment, the filter structure includes a positioning structure 12 arranged on the support frame 1 for clamping and limiting the connecting rod 4. Four groups of positioning structures 12 are correspondingly arranged for each filter unit 2. The positioning structure 12 clamps the connecting rod 4 at the end of the guide groove so that the filter unit 2 is in a state where the plate surface of the filter unit 2 is perpendicular to the flow direction or the plate surface of the filter unit 2 is parallel to the flow direction. The positioning structure 12 includes a pair of fixed plates 13 fixedly connected to the support frame 1. The fixed plates 13 are arranged at intervals. A clamping plate 15 is provided on the opposite side of the fixed plate for guiding and sliding. The support frame 1 is fixed with a telescopic structure. The clamping plate 15 is fixedly connected to the telescopic structure. When the clamping plate 15 is extended, the limiting rod is clamped and limited. In this embodiment, a dovetail groove 14 is provided on one side of the fixed plate 13, and a slider 16 adapted to the guiding and sliding of the dovetail groove 14 is provided on the side of the clamping plate 15 facing the fixed plate 13. In this embodiment, the telescopic structure is an electric telescopic rod 17 , which can drive the telescopic plate to move relative to the fixed plate 13 , so that the telescopic plate can clamp or unlock the connecting rod 4 .

[0036] The ecological floating bed includes a plurality of detachably connected floating plates 19, and the floating plates 19 are hollow structures to increase the buoyancy of the floating plates 19. The floating plates 19 are provided with grooves 20 for placing green plant pots, and the bottom of the grooves 20 is provided with through holes 23 that penetrate up and down. When the green plant pots are placed in the grooves 20, river water can penetrate into the green plant pots from the through holes 23 to irrigate the green plants. Connecting parts are provided at the four corners of the ecological floating bed, and adjacent ecological floating beds are connected by connecting parts. The floating plates 19 are fixedly connected to the bottom of the river channel by connecting ropes so that the ecological floating bed floats on the river channel. Specifically, four long strip holes 21 that penetrate up and down are evenly distributed on the floating plates 19 in the circumference of the grooves 20, and a rope groove 22 is provided between the long strip holes 21 and the edge of the floating plates 19, and the connecting rope is fixed to the floating plates 19 through the long strip holes 21 of the ecological floating bed; in this embodiment, the green plants in the green plant pots can be pink green foxtail algae or copper coin grass. Utilize the plant roots to absorb nutrients in the water, such as total phosphorus, ammonia nitrogen, organic matter, etc., so that the nutrients in the water body can be transferred and the eutrophication caused by insufficient self-circulation of the water body can be alleviated.

[0037] The connecting part is a support plate 24 arranged at the four corners of the floating plate 19, the thickness of the support plate 24 is less than the thickness of the floating plate 19, a connecting hole is provided on the support plate 24, the connecting member includes a circular plate structure, the circular plate structure is provided with a through hole 25 corresponding to the connecting hole of the support plate 24, and the connecting member also includes a bolt that sequentially passes through the connecting hole and the through hole 25. The multiple floating plates 19 are fixedly connected by the circular plate structure and the bolts.

[0038] The aeration device is laid at the bottom of the river channel to supply oxygen to the river water; the aeration device includes a main pipeline 34 and an air distribution pipe 27 laid at the bottom of the river channel, and the main pipeline 34 and the air distribution pipe 27 are connected by a connecting pipe 26; in this embodiment, the main pipeline 34 is connected to the aerator 32 on the river bank through a connecting hose 33. The air distribution pipe 27 includes a plurality of horizontal pipes 28 arranged at intervals and vertical pipes 29 connected to the horizontal pipes 28. The horizontal pipes 28 and the vertical pipes 29 form a horizontal pipe network, and the connecting pipe 26 is connected to the vertical pipe 29. An aeration head 30 is provided on the horizontal pipe 28. The aerator 32 supplies air to the main pipeline 34 through the connecting hose 33, and the main pipeline 34 supplies air to the air distribution pipe 27 through the connecting pipe 26. The air distribution pipe 27 sprays the supplied gas evenly to increase oxygen in the river. In this embodiment, the aeration head 30 is arranged at a density of 1 / 50m 2 , aeration head 30 aeration volume each 20m 3 / h. This increases the oxygen content in the river water, making it easier to decompose pollutants in the river water.

[0039] In this embodiment, microbial agents can be sprayed to assist in regulating water quality according to the pollution situation of the river. Bioactive liquids of photosynthetic bacteria, ammonia oxidizing bacteria, nitrifying bacteria and other bacterial communities can be sprayed into the river according to the water quality conditions.

[0040] The present invention uses a filtration structure, an ecological floating bed, and an aeration device to sequentially adsorb and filter river water, purify it with green plants, and increase the oxygen content. It can effectively remove flocculent suspended matter and solid pollutants in the water, and remove substances such as nitrogen and phosphorus in the water through green plants, thereby achieving long-term and effective purification of the river water.

[0041] In the above embodiment, a bottom plate is arranged at the bottom of the river channel, and the bottom of the filter unit is hingedly connected to the bottom plate; in other embodiments, the bottom plate may not be arranged, and in this case, the bottom of the filter unit is not hingedly connected to the bottom plate either.

[0042] In the above embodiment, the guide groove is an arc with the axis of the vertical rod as the center and the distance between the vertical rod and the connecting rod as the radius; in other embodiments, the structural form of the guide groove can also be other shapes.

[0043] In the above embodiment, the central angle corresponding to the guide groove is 90°. In other embodiments, the central angle corresponding to the guide groove may be smaller than 90°.

[0044] In the above embodiment, the filtering structure includes a limiting structure arranged on the support frame for clamping and limiting the connecting rod; in other embodiments, the limiting structure may not be arranged or the limiting structure may have other structural forms.

[0045] In the above embodiment, four vertically penetrating elongated holes are evenly distributed on the floating plate in the circumferential direction of the groove, and a rope passing groove is provided between the elongated holes and the edge of the floating plate; in other embodiments, the elongated holes may not be provided, or the elongated holes may be provided but the rope passing groove may not be provided.

[0046] In the above embodiment, the connecting part is a support plate arranged at the four corners of the floating plate, the thickness of the support plate is less than the thickness of the floating plate, and a connecting hole is provided on the support plate; in other embodiments, the connecting part can also be a connecting ear fixed on the floating plate, and a connecting hole is provided on the connecting ear.

[0047] In the above embodiment, the air distribution pipe includes a plurality of horizontal pipes arranged at intervals and vertical pipes connected to the horizontal pipes, the horizontal pipes and the vertical pipes form a horizontal pipe network, and the connecting pipes are connected to the vertical pipes; in other embodiments, the structure of the air distribution pipe can also be other structural forms, for example, the air distribution pipe is a frame-shaped structure, and an aeration head is provided on the air distribution pipe.

Claims

1. A river rapid purification ecological circulation system, characterized by: include: A filtration structure is arranged upstream of the river channel, and the filtration structure comprises a support frame fixedly supported on the river channel, and a plurality of filtration units extending into the water body of the river channel are arranged at intervals on the support frame; The filter unit is plate-shaped, and the angle of the filter unit can be adjusted relative to the support frame; When the water flow in the river is large, the plate surface of the filter unit is in the same direction as the flow, so that the river water can be discharged; When the water flow in the river is small, the plate surface of the filter unit is perpendicular to the flow direction to filter the river water; The filter unit includes a stone filter layer and an activated carbon block layer arranged vertically on the plate surface; The ecological floating bed is arranged downstream of the filtering structure. The ecological floating bed includes a plurality of detachably connected floating plates. The floating plates are provided with grooves for placing green plant pots. The bottom of the grooves is provided with through holes that penetrate from top to bottom. Connecting parts are arranged at the four corners of the ecological floating bed. Adjacent ecological floating beds are connected by connecting pieces. The floating plates are fixedly connected to the bottom of the river channel by connecting ropes so that the ecological floating bed floats on the river channel. The aeration device is arranged downstream of the ecological floating bed and is laid on the bottom of the river channel to supply oxygen to the river water.

2. The rapid river purification ecological circulation system according to claim 1 is characterized in that: A bottom plate is arranged at the bottom of the river channel, the bottom of the filter unit is hingedly connected to the bottom plate, two connecting rods extending in the up-down direction are symmetrically fixed above the filter unit, and a guide groove for the connecting rods to pass through is arranged on the support frame; the two connecting rods pass through the guide groove upward, and a limiting structure is arranged on the two connecting rods so that the filter unit is hung on the support frame; A cross bar is fixed at the top of the two connecting rods, a vertical bar is fixed in the middle of the cross bar in its extension direction, the lower end of the vertical bar extends to the support frame and is rotatably arranged relative to the support frame, a gear is fixed to the upper end of the vertical bar, and a rack meshing with the gear is arranged on the support frame. The gear and the rack are transmitted to achieve angle adjustment of the filter unit.

3. The rapid river purification ecological circulation system according to claim 2 is characterized in that: The guide groove is an arc with the vertical rod axis as the center and the distance between the vertical rod and the connecting rod as the radius. Each filter unit corresponds to two guide grooves, and the two guide grooves are symmetrical about the projection center of the vertical rod axis on the horizontal plane.

4. The rapid river purification ecological circulation system according to claim 3 is characterized in that: The central angle of the guide groove is 90°, and each filter unit corresponds to two guide grooves, namely a first guide groove and a second guide groove arranged front and back; When one connecting rod of the filter unit is located at the rear end of the first guide groove and the other connecting rod is located at the front end of the second guide groove, the plate surface of the filter unit is perpendicular to the flow direction; When one connecting rod of the filter unit is located at the front end of the first guide groove and the other connecting rod is located at the rear end of the second guide groove, the plate surface of the filter unit is parallel to the flow direction.

5. The rapid river purification ecological circulation system according to claim 4 is characterized in that: The filtering structure includes a positioning structure arranged on the support frame for clamping and limiting the connecting rod. Each filter unit is correspondingly provided with four groups of positioning structures. The positioning structure clamps the connecting rod at the end of the guide groove so that the filter unit is in a state where the plate surface of the filter unit is perpendicular to the flow direction or the plate surface of the filter unit is parallel to the flow direction.

6. The rapid river purification ecological circulation system according to claim 5 is characterized in that: The positioning structure includes a pair of fixed plates fixedly connected relative to the support frame, a clamping plate is slidingly provided on the opposite sides of the fixed plates, a telescopic structure is fixed to the support frame, the clamping plate is fixedly connected to the telescopic structure, and when the clamping plate is extended, the limit rod is clamped and limited.

7. A river rapid purification ecological circulation system according to any one of claims 1-6, characterized in that: The floating plate is provided with four vertically penetrating long holes evenly distributed in the circumferential direction of the groove, and a rope passing groove is arranged between the long holes and the edge of the floating plate.

8. The rapid river purification ecological circulation system according to claim 7 is characterized in that: The connecting part is a support plate arranged at the four corners of the floating plate. The thickness of the support plate is less than that of the floating plate. A connecting hole is opened on the support plate. The connecting member includes a circular plate structure. The circular plate structure has through holes corresponding to the connecting holes of the support plate. The connecting member also includes bolts that pass through the connecting holes and the through holes in sequence.

9. A river rapid purification ecological circulation system according to any one of claims 1-6, characterized in that: The aeration device comprises a main pipeline and an air distribution pipe laid at the bottom of the river channel, and the main pipeline and the air distribution pipe are connected through a connecting pipe.

10. The rapid river purification ecological circulation system according to claim 9 is characterized in that: The gas distribution pipe includes a plurality of horizontal pipes arranged at intervals and vertical pipes connected to the horizontal pipes. The horizontal pipes and the vertical pipes form a horizontal pipe network, and the connecting pipe is connected to the vertical pipe.

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