River channel reoxygenation purification system

Abstract

The utility model discloses a riverway reoxygenation purification system which comprises circulating reoxygenation purification subsystems, each circulating reoxygenation purification subsystem comprises a counterweight unit, a microorganism purification unit and a transverse circulation unit, and when the number of the circulating reoxygenation purification subsystems is multiple, the circulating reoxygenation purification subsystems are arranged in the flow direction of a riverway. The microorganism purification unit comprises a purification filler suitable for attachment growth of microorganisms so as to purify a river water body; the transverse circulation unit is matched with a nozzle through a circulation flow making pump, so that water flowing is enhanced, and formation of a dead water area is avoided to the greatest extent; meanwhile, when a plurality of groups of circulating reoxygenation purification subsystems are arranged, the circulating reoxygenation purification subsystems are arranged along the flow direction of the river channel, the natural river channel form is simulated, the flow state is improved, and the fluid change is increased. The device has double functions of physical filtration and biological purification on incoming water of a river, meets the multi-layer reoxygenation requirement of a river channel, increases the reoxygenation control area, is good in purification effect, simulates a natural river channel and increases fluid change.

Description

TECHNICAL FIELD

[0001] The utility model relates to riverway management technical field, especially a riverway reoxygenation purification system. BACKGROUND

[0002] With the development of urbanization, river ecosystem has become the most threatened ecosystem, at present, river pollution is still mainly organic pollution, poor water flowability and slow flow velocity can easily lead to that natural reoxygenation rate of river often cannot meet the demand of aerobic rate caused by organic matter degradation, thereby causing low dissolved oxygen of river, increasing black odor and water bloom risk of water body. In order to improve biological habitat and protect water ecological system stability, it is necessary to increase river reoxygenation capacity.

[0003] At present, the measures for increasing reoxygenation capacity of river mainly include fixed aeration reoxygenation mode and mobile reoxygenation mode, wherein the fixed aeration reoxygenation mode is the most common engineering measure.

[0004] The river fixed aeration reoxygenation technology in the prior art mainly includes solar energy jet flow aeration type, impeller type or water wheel type flow aeration type, river bottom aeration pipe aeration reoxygenation type and masonry drop dam type.

[0005] The solar energy jet flow aeration reoxygenation mode utilizes solar energy to drive rotation of the pump, so that water body is sprayed upward from a certain height to flow, then water flow carries air back to the water body to achieve the purpose of oxygenation. Therefore, the oxygenation range is only the surface water body, and the dissolved oxygen content of the bottom water body cannot be improved, and the radius controlled by a single aeration unit is limited, if a certain treatment effect is to be achieved, the layout amount needs to be increased, thereby problems such as occupying river area, shielding sunlight and affecting flood discharge are caused.

[0006] The impeller type or water wheel type flow aeration type is mainly arranged on the upper layer of water body, is mainly single-point oxygenation, has small coverage range, and relies on external power only, so the energy consumption is relatively high.

[0007] The river bottom aeration pipe aeration reoxygenation mode lays the perforated pipe or the micro-porous aerator on the river bottom, increases oxygen by the aeration fan, and releases the fine air bubbles into the water body through the perforated pipe or the micro-porous aerator laid on the river bottom to increase the oxygen transfer efficiency. Due to the inevitable silt accumulation of the river, the air holes of the perforated pipe or the micro-porous aerator laid on the river bottom are easily blocked, the reoxygenation capacity is unstable, and the energy consumption is extremely high.

[0008] The masonry drop dam type reoxygenation mode is a method for increasing the dissolved oxygen content of water by using a water conservancy structure, the dam body is built to make the upstream water drop into the downstream, and the water flow agitation and turbulence caused by the drop are beneficial to the contact between air and water and the dissolution of oxygen. The drop dam type reoxygenation only reoxygenates the water downstream of the dam body, and the reoxygenation capacity is weak, in addition, the dam body masonry engineering quantity is relatively huge, and the construction is relatively complex, and the chemical, physical and biological changes of the river due to the dam building change the original water quality conditions, leading to the increase of the salinity of the upstream water body, the water temperature stratification, the aggravation of the algae reproduction and the like. On the other hand, the dam body construction also destroys the habitat of part of terrestrial plants, blocks the migration channel of migratory fish, affects the species exchange, changes the aquatic plants and their habitats in the downstream river section and the like, is not conducive to the biological habitat protection and has poor ecological benefits.

[0009] The above common reoxygenation measures are single oxygenation technologies, and all have defects in the water reoxygenation and water quality purification effects. Practical new type content

[0010] The purpose of the present application is to provide a river reoxygenation and purification system to solve the problems of the above related technologies, to physically filter and biologically purify the river water, to double purify and meet the multi-level reoxygenation demand of the river, to increase the reoxygenation control area, to reduce the influence of the river sludge on the aeration equipment and the influence of the flood discharge, to have good purification effect and low construction cost.

[0011] To achieve the above purpose, the present application provides the following scheme:

[0012] The present application provides a river reoxygenation and purification system, which comprises a circulating reoxygenation and purification subsystem, and the circulating reoxygenation and purification subsystem comprises:

[0013] A counterweight unit is arranged in the river and matches the width of the river cross section, and the water flow in the river can pass through the counterweight unit;

[0014] A microbial purification unit comprises a fixed frame and purification filler arranged in the fixed frame, and microorganisms can adhere to the purification filler to purify the river water; the number of the microbial purification units is multiple groups, the microbial purification units are arranged along the direction of the river cross section and are fixed to the top of the counterweight unit;

[0015] A transverse circular flow unit is arranged at the top of the microbial purification unit, the transverse circular flow unit comprises a circulating flow pump and a nozzle, the water outlet end of the circulating flow pump is in communication with the nozzle, and the nozzle is arranged towards the longitudinal center line of the river;

[0016] When the number of the circulating reoxygenation and purification subsystems is multiple groups, the circulating reoxygenation and purification subsystems are arranged along the flow direction of the river.

[0017] Preferably, the counterweight unit comprises a net box and counterweights filled in the net box, and the river water flow can flow between the counterweights;

[0018] The net box is a gabion net box, and the counterweights are pebbles;

[0019] The depth of the counterweight unit sinking into the river bottom mud is not less than 50 cm, and the specific depth is designed according to the river bottom mud and geological conditions, so as to ensure the stability of the counterweight unit.

[0020] Preferably, the purification filler comprises a first filler layer, a second filler layer and a third filler layer arranged in sequence along the water flow direction, the first filler layer is formed by filling iron-carbon materials, the second filler layer is formed by filling zeolite, and the third filler layer is formed by filling modified bentonite particles.

[0021] Preferably, the aperture diameter of the fixed frame ranges from 0.5 cm to 3 cm;

[0022] The fixed frame is provided with an ear.

[0023] Preferably, gaps are arranged between adjacent microbial purification units, and planting layers are arranged between adjacent microbial purification units, the planting layers are located on the top of the counterweight units, and the planting layers are provided with planting soil and can plant submerged plants.

[0024] Preferably, the transverse circulation unit further comprises a pollution blocking box, a plurality of filter screens are arranged in the pollution blocking box, and the mesh of the filter screens decreases in sequence along the water flow direction, the circulating flow pump is connected with the nozzle in communication through the pollution blocking box, the nozzle is located above the circulating flow pump, and a filter element is arranged at the water outlet of the nozzle;

[0025] The circulating flow pump and the nozzle are respectively detachably connected with the pollution blocking box.

[0026] Preferably, the transverse circulation unit is connected with the counterweight unit through a connecting mechanism, the circulating flow pump is connected with a U-shaped support, and one end of the U-shaped support away from the circulating flow pump extends into the bottom of the counterweight unit.

[0027] Preferably, a mounting structure layer is arranged between the transverse circulation unit and the microbial purification unit, and a gasket is arranged between the circulating flow pump and the mounting structure layer, so as to realize leveling of the circulating flow pump.

[0028] A vertical fixed steel plate is arranged on the side of the circulating flow pump away from the water outlet end, and the circulating flow pump is connected with the vertical fixed steel plate through a ring-shaped buckle.

[0029] Preferably, the number of the transverse circular flow units is two groups, the two groups of the transverse circular flow units are arranged along the river cross-section direction and fixed to the top of the microbial purification units at two ends, and the two groups of the transverse circular flow units are symmetrically arranged with the river longitudinal center line as an axis.

[0030] Preferably, when the number of the circulating reoxygenation purification subsystems is multiple groups, the microbial purification units of adjacent circulating reoxygenation purification subsystems are staggered along the flow direction of the river channel.

[0031] The river reoxygenation purification system of the utility model has the following technical effects relative to the related art: the river reoxygenation purification system of the utility model comprises a circulating reoxygenation purification subsystem, the circulating reoxygenation purification subsystem comprises a counterweight unit, a microbial purification unit and a transverse circular flow unit, wherein the counterweight unit is arranged in a river channel and matches the river cross-section width, and the water flow in the river channel can pass through the counterweight unit; the microbial purification unit comprises a fixed frame and purification filler arranged in the fixed frame, and microorganisms can adhere to the purification filler to purify the river water body; the number of the microbial purification units is multiple groups, the microbial purification units are arranged along the river cross-section direction and fixed to the top of the counterweight unit; the transverse circular flow unit is arranged at the top of the microbial purification unit, the transverse circular flow unit comprises a circulating flow pump and a nozzle, the water outlet end of the circulating flow pump is in communication with the nozzle, and the nozzle is arranged towards the river longitudinal center line; when the number of the circulating reoxygenation purification subsystems is multiple groups, the circulating reoxygenation purification subsystems are arranged along the flow direction of the river channel.

[0032] The river reoxygenation purification system of the utility model comprises a circulating reoxygenation purification subsystem, the counterweight unit in the circulating reoxygenation purification subsystem is arranged in a river channel and provides stable support for the microbial purification unit and the transverse circular flow unit, the microbial purification unit comprises purification filler suitable for the adhesion and growth of microorganisms to purify the river water body, and the purification filler is arranged in a fixed frame, different types of purification filler can be replaced according to the specific water quality condition, and different purification requirements can be met; the transverse circular flow unit cooperates with the nozzle by using the circulating flow pump to enhance the water flow and avoid the formation of dead water area to the greatest extent; meanwhile, when multiple groups of circulating reoxygenation purification subsystems are arranged, the circulating reoxygenation purification subsystems are arranged along the flow direction of the river channel, the natural river channel form is simulated, the flow state is improved, and the fluid change is increased. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0034] Fig. 1 A cross-sectional view along the transverse direction of the river channel of the river channel reoxygenation purification system disclosed in the embodiments of the present application is shown in the drawings.

[0035] Fig. 2 A structure view along the longitudinal direction of the river channel of the river channel reoxygenation purification system disclosed in the embodiments of the present application is shown in the drawings.

[0036] In the drawings: 1, counterweight unit; 2, net cage; 3, planting layer; 4, submerged plant; 5, microbial purification unit; 6, fixed frame; 7, first filler layer; 8, second filler layer; 9, third filler layer; 10, transverse circulation unit; 11, circulating flow pump; 12, nozzle; 13, pollution blocking box; 14, U-shaped support; 15, gasket; 16, vertical fixed steel plate; 17, annular buckle; 18, mounting structure layer. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] The present application provides a river channel reoxygenation purification system, which aims to solve the problems in the related art, physically filters and biologically purifies river water, meets the multi-level reoxygenation demand of the river channel through double purification treatment, increases the reoxygenation control area, reduces the influence of river channel sludge on the aeration equipment and the influence of flood discharge, has good purification effect and low construction cost.

[0039] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail in combination with the drawings and specific embodiments.

[0040] The present application provides a river channel reoxygenation purification system, which aims to solve the problems in the related art, physically filters and biologically purifies river water, meets the multi-level reoxygenation demand of the river channel through double purification treatment, increases the reoxygenation control area, reduces the influence of river channel sludge on the aeration equipment and the influence of flood discharge, has good purification effect and low construction cost. Figs. 1-2, including a circulating reoxygenation purification subsystem, the circulating reoxygenation purification subsystem including a counterweight unit 1, a microbial purification unit 5, and a transverse circulation unit 10, wherein the counterweight unit 1 is arranged in the river channel and matches the width of the river cross section, and the water flow in the river channel can pass through the counterweight unit 1; the microbial purification unit 5 includes a fixed frame 6 and purification filler arranged in the fixed frame 6, and microorganisms can attach to the purification filler to purify the river water body; the number of microbial purification units 5 is multiple groups, and the microbial purification units 5 are arranged along the river cross section direction and fixed to the top of the counterweight unit 1; the transverse circulation unit 10 is arranged at the top of the microbial purification unit 5, and the transverse circulation unit 10 includes a circulating flow pump 11 and a nozzle 12, the water outlet end of the circulating flow pump 11 is communicated with the nozzle 12, and the nozzle 12 is arranged towards the longitudinal center line of the river; when the number of circulating reoxygenation purification subsystems is multiple groups, the circulating reoxygenation purification subsystems are arranged along the flow direction of the river channel.

[0041] The river reoxygenation purification system of the utility model, including circulating reoxygenation purification subsystem, the counterweight unit 1 in circulating reoxygenation purification subsystem is arranged in the river channel, and provides stable support for microbial purification unit 5 and transverse circulation unit 10, microbial purification unit 5 includes the purification filler suitable for the attachment growth of microorganism, to purify the river water body, and the purification filler is arranged in the fixed frame 6, can replace different types of purification filler according to specific water quality condition, satisfies different purification demand, transverse circulation unit 10 utilizes circulating flow pump 11 and nozzle 12 cooperation, enhances water flow, avoids the formation of dead water area to the greatest extent, simultaneously, when setting multiple circulating reoxygenation purification subsystems, circulating reoxygenation purification subsystems are arranged along the flow direction of the river channel, simulate natural river channel form, improve flow state, increase fluid variation.

[0042] Wherein, the counterweight unit 1 includes a net cage 2 and a counterweight filled in the net cage 2, and the river water flow can pass through the counterweight. While the counterweight unit 1 supports the microbial purification unit 5 and the transverse circulation unit 10, the river water flow can pass through the counterweight unit 1, not only playing a counterweight role, but also the net cage 2 can reduce the blockage caused by the thickening of the sludge.

[0043] In the specific embodiment, the net cage 2 is a gabion net cage, which not only plays a role of counterweight, but also can reduce the blocking caused by the thickening of silt. The counterweight is natural pebbles, which is convenient to obtain and has low use cost. The depth of the counterweight unit 1 sinking into the river bottom silt is generally not less than 50 cm, so as to avoid that the depth of the counterweight unit 1 is too low to affect the normal play of the microbial purification unit 5 and the transverse ring flow unit 10. In actual application, the sinking depth of the counterweight unit 1 can be selected according to the river bottom geological conditions, and the specific depth is designed according to the river bottom silt and geological conditions, so as to ensure the stability of the counterweight unit 1.

[0044] Specifically, the purification filler includes the first filler layer 7, the second filler layer 8 and the third filler layer 9 arranged in sequence along the water flow direction. The first filler layer 7 is formed by filling iron-carbon material, the second filler layer 8 is formed by filling zeolite, and the third filler layer 9 is formed by filling modified bentonite particles. The iron-carbon material can form a micro-electrolysis reaction in sewage to form a primary cell, and the adsorption effect of the cathode active carbon can significantly improve the DO content (the content of dissolved oxygen) and enhance the removal of COD (the total amount of organic matter in wastewater) and nitrogen-containing pollutants. The zeolite has good adsorption and cation exchange performance, and can significantly reduce the content of ammonia nitrogen in the water environment. In addition, the developed pores of the zeolite can also provide a good attachment site for microorganisms. The modified bentonite particles have good phosphorus removal effect, and can realize safe and efficient phosphorus removal and algae prevention in natural water bodies.

[0045] Specifically, the purification filler includes the first filler layer 7, the second filler layer 8 and the third filler layer 9 arranged in sequence along the water flow direction. The first filler layer 7 is formed by filling iron-carbon material, the second filler layer 8 is formed by filling zeolite, and the third filler layer 9 is formed by filling modified bentonite particles. The iron-carbon material can form a micro-electrolysis reaction in sewage to form a primary cell, and the adsorption effect of the cathode active carbon can significantly improve the DO content (the content of dissolved oxygen) and enhance the removal of COD (the total amount of organic matter in wastewater) and nitrogen-containing pollutants. The zeolite has good adsorption and cation exchange performance, and can significantly reduce the content of ammonia nitrogen in the water environment. In addition, the developed pores of the zeolite can also provide a good attachment site for microorganisms. The modified bentonite particles have good phosphorus removal effect, and can realize safe and efficient phosphorus removal and algae prevention in natural water bodies.

[0046] More specifically, gaps are formed between the adjacent microbial purification units 5, and the planting layer 3 is arranged between the adjacent microbial purification units 5. The planting layer 3 is located on the top of the counterweight unit 1, and the planting layer 3 is provided with planting soil and can plant the submerged plants 4. The planting layer 3 is arranged on the top of the counterweight unit 1 without the microbial purification unit 5, and is covered with planting soil and can be used for planting the submerged plants 4, so as to increase the biomass of the river bottom and play a role of purifying water quality. In actual application, appropriate submerged plants 4 can be selected according to the water quality and water depth of the river.

[0047] In the specific embodiment, the transverse circulating unit 10 further comprises a dirt blocking box 13, a plurality of filter screens are arranged in the dirt blocking box 13, and the mesh size of the filter screens is gradually reduced along the water flow direction; the circulating flow pump 11 is connected with the nozzle 12 through the dirt blocking box 13; the dirt blocking box 13 is provided with a plurality of filter screens, so that the water flow can be filtered and the dirt can be intercepted to avoid the nozzle 12 from being blocked; the nozzle 12 is located above the circulating flow pump 11, and a filter element is also arranged at the water outlet of the nozzle 12; it should be further pointed out that the nozzle 12 can be a high-pressure nozzle 12 to ensure that the water flow is smoothly sprayed out and the working reliability of the transverse circulating unit 10 is ensured; and the dirt blocking box 13 can be made of stainless steel to enhance corrosion resistance.

[0048] In the implementation mode of the utility model, the circulating flow pump 11 and the nozzle 12 are detachably connected with the dirt blocking box 13, which facilitates disassembly and maintenance; in actual application, a threaded connection mode can be selected, which is fastened and convenient to disassemble and assemble.

[0049] Further, the transverse circulating unit 10 is connected with the counterweight unit 1 through a connecting mechanism, the circulating flow pump 11 is connected with a U-shaped support 14, one end of the U-shaped support 14 away from the circulating flow pump 11 extends into the bottom of the counterweight unit 1, so that the structural stability of the transverse circulating unit 10 is ensured; in the specific embodiment, three groups of U-shaped supports 14 are used to fix the circulating flow pump 11, so that the structural stability is provided; the U-shaped support 14 extends into the bottom of the counterweight unit 1, and the length of the U-shaped support 14 can be adjusted according to the specifications of the counterweight unit 1 and the microbial purification unit 5.

[0050] Meanwhile, a mounting structure layer 18 is arranged between the transverse circulating unit 10 and the microbial purification unit 5, the mounting structure layer 18 can be paved with gravel, and a gasket 15 is arranged between the circulating flow pump 11 and the mounting structure layer 18; the gasket 15 can be made of stainless steel, which is corrosion-resistant and structurally stable; the mounting structure layer 18 and the gasket 15 can be used to level the circulating flow pump 11, so that the normal work of the circulating flow pump 11 is ensured.

[0051] In order to further stably support the circulating flow pump 11, a vertical fixed steel plate 16 is arranged on the side of the circulating flow pump 11 away from the water outlet end, the circulating flow pump 11 is connected with the vertical fixed steel plate 16 through a ring buckle 17, the vertical fixed steel plate 16 cooperates with the U-shaped support 14 to bidirectionally fix the circulating flow pump 11 through the horizontal and vertical directions, so that the structural stability and working reliability of the transverse circulating unit 10 are improved, and the transverse circulating unit 10 is convenient to disassemble and assemble, which provides convenience for later maintenance.

[0052] Further, in the specific embodiment, the number of the transverse circulation units 10 is generally two groups according to the working parameters of the circulation flow pump 11 and the width of the river channel, the two groups of the transverse circulation units 10 are arranged along the river cross-section direction and are fixed to the top of the microbial purification units 5 at both ends, and the two groups of the transverse circulation units 10 are symmetrically arranged with the river longitudinal center line as the axis, the flow range of the water body is increased, the dead water area is avoided, the service water body is maximally covered, and the influence on the river flood discharge is maximally reduced. In actual application, the number of the transverse circulation units 10 can also be adjusted according to the width of the river channel, a plurality of groups or a single group of staggered arrangement can be arranged according to the river width, and the arrangement can be symmetric or staggered; in addition, a suitable specification of the circulation flow pump 11 can also be selected. It should be explained here that in actual application, other water pumps capable of forming circulation can also be selected. The river channel reoxygenation purification system of the utility model realizes the combination of power aeration and non-power aeration in the reoxygenation mode, and enriches the river channel reoxygenation mode.

[0053] When the number of the circulation reoxygenation purification subsystems is multiple groups, the microbial purification units 5 of adjacent circulation reoxygenation purification subsystems are staggered arranged along the flow direction of the river channel. It should be emphasized that the microbial purification units 5 are arranged along the river cross-section direction, and there is a gap between adjacent microbial purification units 5 to form a notch, so that the circulation reoxygenation purification subsystem has a height difference and forms a zigzag structure, which, in combination with the arrangement of multiple groups of the circulation reoxygenation purification subsystems on the river longitudinal section in the utility model, simulates the natural river channel form, improves the flow state, increases the fluid change, and forms the form of the interlaced deep pool and shoal of the river channel. The multiple groups of the circulation reoxygenation purification subsystems are arranged along the flow direction of the river channel to form a "deep pool-rapid flow" system structure, which, in combination with the material of the microbial purification unit 5 and the material of the counterweight unit 1, forms the heterogeneity of multiple ecological factors, thereby creating the diversity of the natural river habitat, and then bringing the diversity of the river biological community, and promoting the formation of the good ecological environment of the river. At the same time, the water flow is increased along the river cross-section direction and the longitudinal direction, and the natural water reoxygenation capacity is improved.

[0054] The principle and implementation mode of the utility model are described by applying specific examples in the utility model, and the above embodiment is only used to help understand the method and core idea of the utility model; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range will be changed according to the idea of the utility model. In conclusion, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A riverway reoxygenation purification system characterized by, The circulating reoxygenation purification subsystem comprises: A counterweight unit arranged in the river channel and matching the river cross-sectional width, and the water flow in the river channel can pass through the counterweight unit; A microbial purification unit comprising a fixed frame and purification filler arranged in the fixed frame, and microorganisms can adhere to the purification filler to purify the river water body; the number of the microbial purification units is multiple groups, and the microbial purification units are arranged along the river cross-sectional direction and fixed to the top of the counterweight unit; A transverse ring flow unit arranged at the top of the microbial purification unit, the transverse ring flow unit comprising a circulating flow pump and a nozzle, the water outlet end of the circulating flow pump being in communication with the nozzle, and the nozzle being arranged towards the longitudinal center line of the river; When the number of the circulating reoxygenation purification subsystems is multiple groups, the circulating reoxygenation purification subsystems are arranged along the flow direction of the river channel.

2. The riverway reoxygenation purification system according to claim 1, characterized by: The counterweight unit comprises a net box and counterweights filled in the net box, and the river water flow can pass through between the counterweights; The net box is a gabion net box, and the counterweights are cobblestones; The depth of the counterweight unit sinking into the river bottom mud is not less than 50 cm, and the specific depth is designed according to the river bottom mud and geological conditions, so as to ensure the stability of the counterweight unit.

3. The riverway reoxygenation purification system according to claim 1, characterized by: The purification filler comprises a first filler layer, a second filler layer and a third filler layer arranged in sequence along the water flow direction, the first filler layer is formed by filling iron-carbon materials, the second filler layer is formed by filling zeolite, and the third filler layer is formed by filling modified bentonite particles.

4. The riverway reoxygenation purification system according to claim 3, characterized by: The pore diameter of the fixed frame ranges from 0.5 cm to 3 cm; Lugs are arranged on the fixed frame.

5. The riverway reoxygenation purification system according to claim 1, characterized by: Gaps are arranged between adjacent microbial purification units, and a planting layer is arranged between adjacent microbial purification units, the planting layer being located at the top of the counterweight unit, and the planting layer being provided with planting soil and being capable of planting submerged plants.

6. The riverway reoxygenation purification system according to claim 1, characterized by: The transverse ring flow unit further comprises a pollution blocking box, a plurality of filter screens are arranged in the pollution blocking box, and the mesh size of the filter screens decreases in sequence along the water flow direction, the circulating flow pump is connected to the nozzle through the pollution blocking box, the nozzle is located above the circulating flow pump, and a filter element is arranged at the water outlet of the nozzle; The circulating flow pump and the nozzle are detachably connected to the pollution blocking box.

7. The riverway reoxygenation purification system according to claim 1, characterized by: The transverse ring flow unit is connected to the counterweight unit through a connecting mechanism, the circulating flow pump is connected to a U-shaped support, and one end of the U-shaped support away from the circulating flow pump extends into the bottom of the counterweight unit.

8. The riverway reoxygenation purification system according to claim 7, characterized by: A mounting structure layer is arranged between the transverse ring flow unit and the microbial purification unit, and a gasket is arranged between the circulating flow pump and the mounting structure layer to level the circulating flow pump; A vertical fixed steel plate is arranged on the side of the circulating flow pump away from the water outlet end, and the circulating flow pump is connected to the vertical fixed steel plate through a ring buckle.

9. The riverway reoxygenation purification system according to any one of claims 1 to 8, characterized by: The number of the transverse circulation units is two groups, the two groups of the transverse circulation units are arranged along the river cross-section direction and fixed to the top of the microbial purification units at both ends, and the two groups of the transverse circulation units are symmetrically arranged with the river longitudinal center line as an axis.

10. The riverway reoxygenation purification system according to any one of claims 1 to 8, characterized by: When the number of the circulating reoxygenation purification subsystems is multiple groups, the microbial purification units of adjacent circulating reoxygenation purification subsystems are staggered along the flow direction of the river.

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