Artificial wetland phytoremediation sewage treatment tank and construction process thereof

Abstract

The invention relates to a constructed wetland phytoremediation sewage treatment pond and a construction process thereof, which are applied to the field of sewage treatment, the constructed wetland phytoremediation sewage treatment pond comprises a stabilization pond, an aeration pond, a subsurface flow wetland and a surface flow wetland, standard tail water is sequentially input and output in the stabilization pond, the aeration pond, the subsurface flow wetland and the surface flow wetland through pipelines, and further purification treatment of the standard tail water is completed. An aeration mechanism is arranged in the aeration pond, the aeration mechanism comprises an aeration pipe, a rotating disc, an aeration disc, an aeration nozzle and a turbulent flow spring, by adopting the aeration mechanism, the aeration range is expanded, the aeration efficiency and effect are improved, and the water melting efficiency of gas is improved, so that the treatment effect of the aeration pond on the tail water reaching the standard is better; according to the aeration pond, the number of aeration mechanisms required in the aeration pond with the same area can be reduced, so that the number of arranged pipelines is reduced, the equipment cost required for constructing the aeration pond is reduced, meanwhile, the maintenance workload of subsequent aeration mechanisms can be reduced, and the construction and maintenance cost of the aeration pond is greatly saved.

Description

Technical Field

[0001] The present invention relates to a sewage treatment pool and a construction process thereof, and in particular to an artificial wetland plant restoration sewage treatment pool and a construction process thereof applied in the sewage treatment field. Background Art

[0002] Wastewater recycling and reuse has the advantages that the water source is not affected by climate, is locally available, stable and reliable, and can save high-quality drinking water sources, reduce sewage discharge, alleviate water pollution, and the cost is far lower than long-distance water diversion. It is an effective measure to solve the shortage of water resources.

[0003] The high salt content in wastewater restricts its reuse. When the salt content is above 1000mg / L, it will inhibit crop growth and may cause soil salt accumulation. When the salt content is above 2000mg / L, soil salt accumulation will be obvious, which will lead to a decrease in crop yield. The increase in soil salinity increases the concentration of soil solution and changes the material form, making it difficult for plants to absorb water and nutrients. Plants will reduce production or eventually die due to lack of nutrients. For example, the critical concentration of sodium chloride that harms wheat germination is 2000mg / l, and the critical concentration that harms rice germination is 1000mg / l. The national standard requires that the chloride content of irrigation water should be less than 250mg / l.

[0004] With the acceleration of urbanization and industrialization, the amount of urban sewage is increasing, and the shortage of water resources has become a bottleneck restricting the sustainable development of my country's social economy. At present, it is urgent to find a sewage treatment technology that is efficient, low-cost, and has unique economic and social benefits.

[0005] To solve the above problems, the Chinese patent CN201825784U specification discloses an artificial wetland plant restoration sewage treatment pool, the treatment pool is composed of a plant treatment pool, a water collection pool and a clear water pool, the plant treatment pool, the water collection pool and the clear water pool are connected in sequence, the plant treatment pool is connected to the water collection pool through an elevated water collection pipe, the water collection pool is connected to the clear water pool through an elevated water inlet pipe, and the clear water pool is discharged by an elevated water outlet pipe. The treatment pool adds biodegradation and adsorption of fillers. When using salt-tolerant plants to treat saline wastewater, the adsorption saturation effect of salt-tolerant bacteria and fillers is strengthened. The salt-accumulating effect of plants is used to absorb salt in sewage, and then the plants are removed from the water, thereby reducing the salt content of the wastewater. The entire device has a simple structure, good wastewater treatment effect, low cost, and effective protection of the ecological environment.

[0006] The treatment effect of the artificial wetland plant restoration sewage treatment pool is not comprehensive enough. With the development of technology, the tail water that meets the standards after sewage treatment needs to be further purified before it can be used in life and agriculture. In the purification of the tail water that meets the standards, it is necessary to build an aeration pond and use an aerator to aerate the tail water that meets the standards, so that the water body can exchange and mix and reoxygenate up and down in the aeration pond, improve the bottom quality, and activate the ecological function of the bottom mud; break the natural stagnant water zone formed by the thermocline, and form a circulating active water flow in the entire water body; However, when the existing aeration mechanism is performing aeration, the aeration range of a single aeration mechanism is small, and the aeration effect and efficiency are not good. Multiple aeration mechanisms need to be used in coordination to achieve the effect of covering the entire water body in the aeration pond. Accordingly, more pipelines need to be laid in the aeration pond, which increases the construction cost of the aeration pond. Similarly, the subsequent maintenance cost of the aeration pond also increases accordingly. Summary of the invention

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is how to provide an aeration mechanism with good aeration effect, high aeration efficiency and large coverage, and to construct an artificial wetland plant restoration sewage treatment pool with the aeration mechanism.

[0008] In order to solve the above problems, the present invention provides an artificial wetland plant restoration sewage treatment pool, including a stabilization pond, an aeration pond, a subsurface flow wetland and a surface flow wetland. The qualified tail water is sequentially input and output in the stabilization pond, the aeration pond, the subsurface flow wetland and the surface flow wetland through a pipeline, so as to complete the further purification treatment of the qualified tail water. The aeration pond is provided with an aeration mechanism, which includes: An aeration pipe, one end of which is connected to an external aerator; A rotating disk, the lower end of which is rotatably connected to the other end of the aeration pipe and keeps a seal, and the rotating disk rotates with the airflow input into the aeration pipe; An aeration plate, the aeration plate is fixed to the upper end of the rotating plate, and a cavity is arranged in the aeration plate; Aeration nozzles, multiple aeration nozzles are arranged and evenly distributed along the upper end of the aeration plate, and the lower ends of the multiple aeration nozzles are fixed to the upper end of the aeration plate and communicated with the cavity of the aeration plate; A spoiler spring, multiple spoiler springs are fixed and evenly distributed along the upper end of the aeration disk, and the multiple spoiler springs are respectively set on the outside of the multiple aeration nozzles. The multiple spoiler springs have different lengths. The spoiler spring located in the middle of the aeration disk is the longest, and the spoiler spring located around the aeration disk is the shortest. The multiple spoiler springs are distributed from the middle of the aeration disk to the sides of the aeration disk, and their lengths decrease successively.

[0009] In the above-mentioned artificial wetland plant restoration sewage treatment pool, the external aerator transports high-pressure gas from the aeration pipe to the rotating disk, and makes the rotating disk rotate with the movement of the airflow, thereby driving the aeration disk, the aeration nozzle and the spoiler spring to rotate. The high-pressure gas in the rotating disk continues to move through the aeration disk and is distributed to multiple aeration nozzles, and is finally ejected from the aeration nozzles to aerate the aeration pond. Since the aeration nozzles and the spoiler springs keep rotating during the aeration process, the gas at the aeration site forms bubbles distributed in a rotating spiral and rises. The spoiler springs act on the bubbles generated by the aeration nozzles during the rotation process. The disturbance and breakage make the bubbles form fine bubbles with smaller diameters and distribute in the water body, which speeds up the melting efficiency of the gas into water; at the same time, due to the different lengths of the distribution setting of the spoiler springs, the spoiler springs will also disturb the water during the rotation process, so that the water body forms a reverse vortex eddy current, which can form a certain traction force on the surrounding water body, so that the water body around the aeration mechanism forms a larger up and down circulation range, expand the influence range of the aeration mechanism, accelerate the movement of the water flow around the aeration mechanism, and also increase the aeration amount of the aeration mechanism per unit time, thereby speeding up the aeration efficiency; Compared with the aeration mechanism in the prior art, the aeration mechanism in the present invention can effectively expand the aeration range, improve the aeration efficiency and effect, and improve the gas-water melting efficiency, so that the aeration pond has a better treatment effect on the qualified tail water and a higher treatment efficiency.

[0010] As a further supplement to the present application, a cavity for air entry is provided in the middle of the rotating disk, and exhaust passages extending outward and penetrating the side wall of the rotating disk are provided around the cavity of the rotating disk; The exhaust passage extends in an arc-shaped outward expansion shape along the middle of the rotating disk toward the peripheral side of the rotating disk.

[0011] As a further supplement to the present application, the inner diameter of the exhaust channel is larger at one end close to the middle of the rotating disk, and smaller at one end close to the peripheral side of the rotating disk, and the inner diameter of the exhaust channel gradually decreases from one end to the other.

[0012] As a further supplement to the present application, an air inlet communicating with the cavity of the rotating disk is provided at the lower end of the aeration disk, and an air delivery passage communicating with the air inlet and the aeration nozzle is also provided inside the aeration disk.

[0013] As a further supplement to the present application, a node air cavity is opened in the aeration disk, and the node air cavity is located at the node where the air duct and the aeration nozzle are connected. The inner diameter of the node air cavity cross section is consistent with the inner diameter of the aeration nozzle pipe, and the inner diameter of the node air cavity cross section is greater than the width of the air duct.

[0014] As a further supplement to the present application, the inner diameter of the air inlet is smaller than the inner diameter of the cavity of the rotating disk.

[0015] As a further supplement to the present application, a diffusion tube is arranged above the spoiler spring. The diffusion tube is an inwardly concave arc-shaped tube. The inner diameter of the upper end of the diffusion tube is larger than the inner diameter of the middle part of the diffusion tube and smaller than the inner diameter of the lower end of the diffusion tube. The length from the middle part to the lower end of the diffusion tube is larger than the length from the upper end to the middle part, and the curvature of the upper pipe of the diffusion tube is smaller than the curvature of the lower pipe of the diffusion tube.

[0016] As a further supplement to the present application, a connecting bearing is fixed at the lower end of the rotating disk, a support tube is fixedly sleeved on the outer side of the connecting bearing, the connecting bearing and the support tube are both sleeved on the outside of the aeration tube, the inner wall of the connecting bearing is rotatably connected to the outside of the aeration tube, and the lower end of the support tube is fixed on the bottom of the aeration pond.

[0017] As a further supplement to this application, artificial aquatic plants are set at the bottom of the stabilization pond to form a huge microbial community. The entire pond is in an anaerobic state. Organic nitrogen is converted into ammonia nitrogen under the action of ammonifying bacteria to prepare for the subsequent nitrification reaction. At the same time, under the action of acid-producing bacteria, macromolecular organic matter is hydrolyzed to improve the biodegradability of sewage. Suspended matter sinks in the stabilization pond under the action of gravity. The stabilization pond also serves to intercept suspended matter. The aeration pond exchanges and reoxygenates water from top to bottom, improves the bottom quality, and activates the ecological function of the bottom mud; it breaks the natural stagnant water zone formed by the thermocline, and the entire water body forms a circulating active water flow. The high-concentration algae-containing water on the surface is transferred to the bottom, which is suppressed and becomes bait for fish and shellfish; Sewage flows inside the bed of the subsurface wetland, making full use of the biofilm grown on the surface of the ecological filler, the rich plant root system, the topsoil and the interception of the ecological filler to improve its treatment effect and treatment capacity, and utilizing the photosynthesis, absorption and root oxygen transfer of plants to achieve good removal effects on organic matter and ammonia nitrogen. Surface flow wetlands have rich and diverse biological habitats such as swamps, shallow water, deep water and island habitats, which can form multi-level food chains such as bacteria and algae, aquatic plants, plankton, benthic animals and waterfowl, forming a complex ecosystem, thereby greatly improving the pollutant removal effect.

[0018] An artificial wetland plant restoration sewage treatment pool and a construction process thereof, comprising: First, stabilization ponds, aeration ponds, subsurface wetlands and surface wetlands are constructed through conventional construction methods, and corresponding pipelines are laid between the stabilization ponds, aeration ponds, subsurface wetlands and surface wetlands to facilitate the transportation and transfer of qualified tailwater; Secondly, a support pipe with an opening is driven into the bottom of the aeration pond, and a connecting bearing is fixed in the support pipe and the upper end. Then, the aeration pipe is passed through the opening of the support pipe and inserted into the support pipe, and the upper end is passed through the middle of the connecting bearing and rotatably connected to the inner wall of the connecting bearing. The sealed welded rotating disk and the aeration disk are further fixed on the connecting bearing, so that the rotating disk and the aeration disk are rotatably connected to the support pipe through the connecting bearing, and at the same time, a sealed rotating connection relationship is ensured between the aeration pipe and the rotating disk. At this time, the overall installation of the aeration mechanism can be completed, and the spreading tube is further fixed above the aeration mechanism by a bracket or other supporting body, so that the spreading tube stays at the tail end of the reverse vortex generated when the aeration mechanism is in operation, and the construction of the artificial wetland plant restoration sewage treatment pool is completed.

[0019] In summary, the external aerator transports high-pressure gas from the aeration pipe to the rotating disk. When the high-pressure gas enters the cavity of the rotating disk, part of the gas is discharged from the exhaust channel, and a reaction force is generated on the rotating disk during the discharge, so that the rotating disk rotates as the gas is discharged, thereby achieving the effect that the rotating disk rotates with the airflow input in the aeration pipe, thereby driving the aeration disk, aeration nozzles and spoiler springs to rotate. The high-pressure gas in the rotating disk continues to move through the aeration disk and is distributed to multiple aeration nozzles, and is finally ejected from the aeration nozzles to aerate the aeration pond. Since the aeration nozzles and spoiler springs keep rotating during the aeration process, the gas at the aeration site forms a rotating spiral distribution. The bubbles generated by the aeration nozzle rise up, and the spoiler spring disturbs and breaks the bubbles generated by the aeration nozzle during the rotation process, so that the bubbles form fine bubbles with smaller diameters and are distributed in the water body, which speeds up the melting efficiency of the gas into water; at the same time, due to the different lengths of the spoiler springs, the spoiler springs will also disturb the water during the rotation process, so that the water body forms a reverse vortex eddy current, which can form a certain traction force on the surrounding water body, so that the water body around the aeration mechanism forms a larger up and down circulation range, expand the influence range of the aeration mechanism, accelerate the water flow passing through the periphery of the aeration mechanism, and also increase the aeration amount of the aeration mechanism per unit time, thereby speeding up the aeration efficiency; The reverse vortex generated by the aeration mechanism is first gathered by the lower part of the diffusion tube when driving the water mixed with fine bubbles to rise. After passing through the diffusion tube, the concentrated water quickly spreads after passing through the upper end of the diffusion tube because the inner diameter of the upper part of the diffusion tube is larger than that of the middle part. As a result, the water mixed with fine bubbles spreads over a wider area during the rising process, expanding the range of the natural stagnant water zone formed by breaking the thermocline during aeration, thereby cooperating with the aeration mechanism to achieve a larger range of water circulation effects; At the same time, the air delivery channel can ensure that the high-pressure gas still maintains a high air pressure when entering the aeration nozzle, thereby ensuring the aeration effect and preventing the high-pressure gas from reducing a lot of pressure due to passing through the air inlet with a larger inner diameter, which has an adverse effect on the aeration effect. The node air cavity can provide a buffer space for the high-pressure gas entering the aeration nozzle through the air delivery channel, preventing most of the pressure of the high-pressure gas from directly acting on the connection between the aeration nozzle and the aeration disk, thereby protecting the connection between the aeration nozzle and the aeration disk, which is beneficial to prolonging the service life of the aeration disk and the aeration nozzle, thereby prolonging the service life of the aeration mechanism; Compared with the aeration mechanism in the prior art, the aeration mechanism in the present invention can effectively expand the aeration range, improve the aeration efficiency and effect, and improve the gas-water melting efficiency, so that the aeration pond has a better treatment effect on the qualified tail water and a higher treatment efficiency; on this basis, the number of aeration mechanisms required in an aeration pond of the same area can be reduced, thereby reducing the number of pipelines to be laid, and reducing the equipment cost required for building an aeration pond. At the same time, the maintenance workload of the subsequent aeration mechanism can be reduced, greatly saving the construction and maintenance costs of the aeration pond. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the first implementation method of the present application; Figure 2 This is a schematic diagram of the stabilization pond structure of the first embodiment of the present application; Figure 3 This is a schematic diagram of the aeration pond structure of the first embodiment of the present application; Figure 4 This is a schematic diagram of the subsurface wetland structure of the first embodiment of the present application; Figure 5 This is a schematic diagram of the surface flow wetland structure of the first embodiment of the present application; Figure 6 This is a schematic diagram of the aeration mechanism structure of the first embodiment of the present application; Figure 7 This is a cross-sectional view of an aeration pipe, a rotating disk, a connecting bearing, and a support pipe according to the first embodiment of the present application; Figure 8 This is a top cross-sectional view of the rotating disk of the first embodiment of the present application; Fig. 9 This is a top view of the aeration disk of the first embodiment of the present application; Fig.10 This is a partial cross-sectional view of the aeration disk according to the first embodiment of the present application when viewed from above; Fig.11 This is a cross-sectional view of the dispersion tube according to the first embodiment of the present application; Fig.12 This is a schematic diagram of the aeration mechanism of the first embodiment of the present application operating in water to form a reverse vortex.

[0021] Description of the numbers in the figure: 100, stabilization pond; 200, aeration pond; 300, subsurface flow wetland; 400, surface flow wetland; 500, aeration mechanism; 1. Aeration pipe; 2. Rotating disk; 21. Exhaust channel; 3. Aeration disk; 31. Air inlet; 32. Air delivery channel; 33. Node air cavity; 4. Aeration nozzle; 5. Turbine spring; 6. Connecting bearing; 7. Support tube; 8. Dispersion tube. DETAILED DESCRIPTION

[0022] An implementation method of the present application is described in detail below with reference to the accompanying drawings.

[0023] The first implementation method: The present invention provides an artificial wetland plant restoration sewage treatment pool and a construction process thereof, comprising two parts: an artificial wetland plant restoration sewage treatment pool and an artificial wetland plant restoration sewage treatment pool construction process; An artificial wetland plant restoration sewage treatment pond, see Figure 1-Figure 7 , including a stabilization pond 100, an aeration pond 200, a subsurface wetland 300 and a surface wetland 400. The qualified tailwater is input and output in the stabilization pond 100, the aeration pond 200, the subsurface wetland 300 and the surface wetland 400 in sequence through pipelines. Among them, artificial aquatic plants are set at the bottom of the stabilization pond 100 to form a huge microbial community. The whole pond is in an anaerobic state. Organic nitrogen is converted into ammonia nitrogen under the action of ammonifying bacteria to prepare for the subsequent nitrification reaction. At the same time, under the action of acid-producing bacteria, macromolecular organic matter is hydrolyzed to improve the biodegradability of sewage. Suspended matter sinks in the stabilization pond under the action of gravity. The stabilization pond also serves to intercept suspended matter. The aeration pond exchanges and reoxygenates at 200 degrees, improves the bottom quality, and activates the ecological function of the bottom mud; breaks the natural stagnant water zone formed by the thermocline, and the entire water body forms a circulating active water flow. The high-concentration algae-containing water on the surface is transferred to the bottom, which is suppressed and becomes bait for fish and shellfish; The sewage flows inside the 300-meter wetland bed of the subsurface wetland, making full use of the biofilm grown on the surface of the ecological filler, the rich plant root system, the topsoil and the interception of the ecological filler to improve its treatment effect and treatment capacity, and utilizing the photosynthesis, absorption and root oxygen transfer of plants to achieve good removal effects on organic matter and ammonia nitrogen. The surface flow wetland 400 has a rich variety of biological habitats such as swamps, shallow water, deep water and island habitats, which can form a multi-level food chain of bacteria and algae, aquatic plants, plankton, benthic animals and waterfowl, forming a complex ecosystem, thereby greatly improving the pollutant removal effect and completing the further purification of the qualified tail water; An aeration mechanism 500 is provided in the aeration pond 200, and the aeration mechanism 500 includes: An aeration pipe 1, one end of which is connected to an external aerator; The rotating disk 2 has a lower end that is rotatably connected to the other end of the aeration pipe 1 and is kept sealed, and the rotating disk 2 rotates along with the airflow input into the aeration pipe 1; The aeration plate 3 is fixed to the upper end of the rotating plate 2, and a cavity is provided in the aeration plate 3; Aeration nozzles 4, multiple aeration nozzles 4 are provided and evenly distributed along the upper end of the aeration plate 3, and the lower ends of the multiple aeration nozzles 4 are fixed to the upper end of the aeration plate 3 and communicated with the cavity of the aeration plate 3; A spoiler spring 5 is provided. Multiple spoiler springs 5 ​​are fixed and evenly distributed along the upper end of the aeration plate 3. The multiple spoiler springs 5 ​​are respectively set one by one on the outside of the multiple aeration nozzles 4. The multiple spoiler springs 5 ​​have different lengths. The spoiler spring 5 located in the middle of the aeration plate 3 is the longest, and the spoiler spring 5 located around the aeration plate 3 is the shortest. The multiple spoiler springs 5 ​​are distributed and extended from the middle of the aeration plate 3 to the surrounding side of the aeration plate 3, and the lengths decrease successively.

[0024] Based on the above structure, the external aerator transports the high-pressure gas from the aeration pipe 1 to the rotating disk 2, and makes the rotating disk 2 rotate with the movement of the airflow, thereby driving the aeration disk 3, the aeration nozzle 4 and the spoiler spring 5 to rotate. The high-pressure gas in the rotating disk 2 continues to move and is distributed to the multiple aeration nozzles 4 through the aeration disk 3, and is finally ejected from the aeration nozzles 4 to aerate the aeration pond 200. Since the aeration nozzles 4 and the spoiler springs 5 ​​keep rotating during the aeration process, the gas at the aeration site forms bubbles distributed in a rotating spiral and rises. The spoiler springs 5 ​​disturb and break the bubbles generated by the aeration nozzles 4 during the rotation process, so that The bubbles are formed into fine bubbles with smaller diameters and distributed in the water body, which speeds up the melting efficiency of the gas into water; at the same time, due to the different lengths of the spoiler springs 5, the spoiler springs 5 ​​will also disturb the water during the rotation process, so that the water body forms a reverse (extending upward) vortex eddy current, thereby being able to form a certain traction force on the surrounding water body, so that the water body around the aeration mechanism 500 forms a larger up and down circulation range, expanding the influence range of the aeration mechanism 500, so that the water flow passing through the periphery of the aeration mechanism 500 is accelerated, and the aeration amount of the aeration mechanism 500 per unit time can also be increased, thereby speeding up the aeration efficiency; Compared with the aeration mechanism in the prior art, the aeration mechanism 500 in the present invention can effectively expand the aeration range, improve the aeration efficiency and effect, and improve the gas-water melting efficiency, so that the aeration pond 200 can better treat the qualified tail water and have higher treatment efficiency; on this basis, the number of aeration mechanisms 500 required in the aeration pond 200 of the same area can be reduced, thereby reducing the number of pipelines to be laid, and reducing the equipment cost required for the construction of the aeration pond 200. At the same time, the subsequent maintenance work of the aeration mechanism 500 can be reduced, greatly saving the construction and maintenance costs of the aeration pond 200.

[0025] Figure 7-Figure 8 It is shown that a cavity for air intake is provided in the middle of the rotating disk 2, and an exhaust passage 21 extending outward and penetrating the side wall of the rotating disk 2 is provided around the cavity of the rotating disk 2; The exhaust passage 21 extends in an arc shape along the middle of the rotating disk 2 toward the peripheral side of the rotating disk 2 .

[0026] When the high-pressure gas enters the cavity of the rotating disk 2, part of the gas is discharged from the exhaust channel 21 and generates a reaction force on the rotating disk 2 during the discharge, so that the rotating disk 2 rotates as the gas is discharged, thereby achieving the effect that the rotating disk 2 rotates with the airflow input into the aeration pipe 1.

[0027] Figure 8 It is shown that the inner diameter of the exhaust channel 21 is larger at one end close to the middle of the rotating disk 2, and the inner diameter of the exhaust channel 21 is smaller at one end close to the peripheral side of the rotating disk 2, and the inner diameter of the exhaust channel 21 gradually decreases from one end to the other end; so that the high-pressure air entering the exhaust channel 21 is further compressed again in the exhaust channel 21 after passing through the cavity, thereby accelerating the flow rate of the high-pressure air in the exhaust channel 21, so that the high-pressure air can generate a greater force when discharged to drive the rotating disk 2 to rotate.

[0028] Figure 9-10 It is shown that an air inlet 31 connected to the cavity of the rotating disk 2 is provided at the lower end of the aeration disk 3. The inner diameter of the air inlet 31 is smaller than the inner diameter of the cavity of the rotating disk 2, so that part of the high-pressure air can be blocked and smoothly enter the exhaust channel 21. The aeration disk 3 is also provided with an air supply passage 32 connected to the air inlet 31 and the aeration nozzle 4. The setting of the air supply passage 32 ensures that the high-pressure gas still maintains a high air pressure when entering the aeration nozzle 4, thereby ensuring the aeration effect and avoiding the high-pressure gas from reducing a lot of pressure due to passing through the air inlet 31 with a larger inner diameter, which has an adverse effect on the aeration effect.

[0029] Figure 9-10It is shown that a node air cavity 33 is opened in the aeration plate 3, and the node air cavity 33 is located at the node where the air supply channel 32 is connected to the aeration nozzle 4. The inner diameter of the cross section of the node air cavity 33 is consistent with the inner diameter of the pipeline of the aeration nozzle 4, and the inner diameter of the cross section of the node air cavity 33 is larger than the width of the air supply channel 32. Through the setting of the node air cavity 33, a buffer space can be provided for the high-pressure gas entering the aeration nozzle 4 through the air supply channel 32, so that most of the pressure of the high-pressure gas is prevented from directly acting on the connection between the aeration nozzle 4 and the aeration plate 3, thereby protecting the connection between the aeration nozzle 4 and the aeration plate 3, which is beneficial to prolonging the service life of the aeration plate 3 and the aeration nozzle 4, thereby prolonging the service life of the aeration mechanism 500.

[0030] Fig.12 It is shown that a diffusion tube 8 is arranged above the spoiler spring 5. The diffusion tube 8 is a concave arc tube. The inner diameter of the upper end of the diffusion tube 8 is larger than the inner diameter of the middle part of the diffusion tube 8 and smaller than the inner diameter of the lower end of the diffusion tube 8. The length from the middle part to the lower end of the diffusion tube 8 is larger than the length from the upper end to the middle part, and the curvature of the upper pipe of the diffusion tube 8 is smaller than the curvature of the lower pipe of the diffusion tube 8.

[0031] By setting the diffusion tube 8, the reverse vortex generated by the aeration mechanism 500 is first gathered by the lower part of the diffusion tube 8 (from the inlet end to the middle section with the smallest inner diameter) during the process of driving the water mixed with fine bubbles to rise. After passing through the diffusion tube 8, since the inner diameter of the upper part of the diffusion tube 8 (from the outlet end to the middle section with the smallest inner diameter) is larger than that of the middle part, the concentrated water body quickly diffuses after passing through the upper end of the diffusion tube 8, so that the water mixed with fine bubbles spreads over a wider area during the rising process, expanding the range of the natural stagnant water zone formed by breaking the thermocline during aeration, thereby cooperating with the aeration mechanism 500 to achieve the effect of driving water circulation in a larger range.

[0032] Figure 3 and Figure 7 It is shown that a connecting bearing 6 is fixed to the lower end of the rotating disk 2, and a support tube 7 is fixedly sleeved on the outer side of the connecting bearing 6. The connecting bearing 6 and the support tube 7 are both sleeved on the outside of the aeration tube 1. The inner wall of the connecting bearing 6 is rotatably connected to the outside of the aeration tube 1, and the lower end of the support tube 7 is fixed to the bottom of the aeration pond 200, which can achieve a stable rotation support effect for the rotating disk 2, the aeration disk 3, the aeration nozzle 4 and the spoiler spring 5, and at the same time play a certain protective role on the pipe connection of the aeration tube 1.

[0033] A construction process for an artificial wetland plant restoration sewage treatment pool is used to construct an artificial wetland plant restoration sewage treatment pool, comprising the following steps: First, a stabilization pond 100, an aeration pond 200, a subsurface wetland 300 and a surface wetland 400 are constructed by conventional construction methods, and corresponding pipelines are laid between the stabilization pond 100, the aeration pond 200, the subsurface wetland 300 and the surface wetland 400 to facilitate the transportation and transfer of the qualified tail water; The conventional construction method mentioned above refers to constructing the stabilization pond 100, the aeration pond 200, the subsurface flow wetland 300 and the surface flow wetland 400 using the existing construction method, and making the stabilization pond 100, the aeration pond 200, the subsurface flow wetland 300 and the surface flow wetland 400 have corresponding functions, and planting and arranging corresponding submerged plants (dwarf cold-resistant Vallisneria, Potamogeton comb-toothed Potamogeton, Foxtail Algae), emergent plants (Phragmites australis, Salix babylonica, Pool Cypress), etc. in the stabilization pond 100, the aeration pond 200, the subsurface flow wetland 300 and the surface flow wetland 400, and at the same time constructing the corresponding ecological slope protection, plank roads and other necessary protective structures and series structures.

[0034] Secondly, a support pipe 7 with an opening is driven into the bottom of the aeration pond 200, and a connecting bearing 6 is fixed in the support pipe 7, the upper end, and then the aeration pipe 1 is passed through the opening of the support pipe 7 into the support pipe 7 and the upper end is passed through the middle of the connecting bearing 6 and rotatably connected to the inner wall of the connecting bearing 6, and the sealed welded rotating disk 2 and the aeration disk 3 are further fixed on the connecting bearing 6, so that the rotating disk 2 and the aeration disk 3 are rotatably connected to the support pipe 7 through the connecting bearing 6, and at the same time, a sealed rotating connection relationship is ensured between the aeration pipe 1 and the rotating disk 2. At this time, the overall installation of the aeration mechanism 500 can be completed, and the dispersion tube 8 is further fixed above the aeration mechanism 500 by a bracket or other supporting body, so that the dispersion tube 8 stays at the tail end of the reverse vortex generated when the aeration mechanism 500 is in operation, and the construction of the artificial wetland plant restoration sewage treatment pool is completed.

[0035] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An artificial wetland phytoremediation sewage treatment pool, comprising a stabilization pond (100), an aeration pond (200), a subsurface flow wetland (300) and a surface flow wetland (400), wherein qualified tail water is sequentially input and output through pipelines in the stabilization pond (100), the aeration pond (200), the subsurface flow wetland (300) and the surface flow wetland (400), thereby completing further purification of the qualified tail water, characterized in that: An aeration mechanism (500) is provided in the aeration pond (200), and the aeration mechanism (500) comprises: An aeration pipe (1), one end of the aeration pipe (1) being connected to an external aerator; A rotating disk (2), the lower end of the rotating disk (2) being rotatably connected to and sealed from the other end of the aeration pipe (1), the rotating disk (2) rotating along with the airflow input into the aeration pipe (1); an aeration plate (3), the aeration plate (3) being fixed to the upper end of the rotating plate (2), and a cavity being arranged inside the aeration plate (3); Aeration nozzles (4), wherein a plurality of aeration nozzles (4) are provided and are evenly distributed along the upper end of the aeration plate (3), and the lower ends of the plurality of aeration nozzles (4) are fixed to the upper end of the aeration plate (3) and are in communication with the cavity of the aeration plate (3); A spoiler spring (5), wherein a plurality of the spoiler springs (5) are fixed and evenly distributed along the upper end of the aeration plate (3), and the plurality of the spoiler springs (5) are respectively set on the outside of the plurality of the aeration nozzles (4), and the plurality of the spoiler springs (5) have different lengths, the spoiler spring (5) located in the middle of the aeration plate (3) has the longest length, and the spoiler spring (5) located at the periphery of the aeration plate (3) has the shortest length, and the plurality of the spoiler springs (5) are distributed and extended from the middle of the aeration plate (3) to the periphery of the aeration plate (3), and the lengths decrease successively.

2. The artificial wetland phytoremediation sewage treatment pool according to claim 1, characterized in that: A cavity for admitting air is provided in the middle of the rotating disk (2), and exhaust passages (21) extending outward and penetrating the side wall of the rotating disk (2) are provided around the cavity of the rotating disk (2); The exhaust passage (21) extends in an arc-shaped outward expansion shape along the middle of the rotating disk (2) toward the peripheral side of the rotating disk (2).

3. The artificial wetland phytoremediation sewage treatment pool according to claim 2, characterized in that: The inner diameter of the exhaust channel (21) at one end close to the middle of the rotating disk (2) is larger, and the inner diameter of the exhaust channel (21) at one end close to the peripheral side of the rotating disk (2) is smaller. The inner diameter of the exhaust channel (21) gradually decreases from one end to the other end.

4. The artificial wetland phytoremediation sewage treatment pool according to claim 2, characterized in that: An air inlet (31) communicating with the cavity of the rotating disk (2) is provided at the lower end of the aeration disk (3), and an air delivery channel (32) communicating with the air inlet (31) and the aeration nozzle (4) is also provided inside the aeration disk (3).

5. The artificial wetland phytoremediation sewage treatment pool according to claim 4, characterized in that: A node air cavity (33) is provided in the aeration plate (3), and the node air cavity (33) is located at a node where the air delivery channel (32) and the aeration nozzle (4) are connected. The inner diameter of the cross section of the node air cavity (33) is consistent with the inner diameter of the pipe of the aeration nozzle (4), and the inner diameter of the cross section of the node air cavity (33) is greater than the width of the air delivery channel (32).

6. The artificial wetland phytoremediation sewage treatment pool according to claim 4, characterized in that: The inner diameter of the air inlet (31) is smaller than the inner diameter of the cavity of the rotating disk (2).

7. The artificial wetland phytoremediation sewage treatment pool according to claim 1, characterized in that: A diffusion tube (8) is arranged above the spoiler spring (5), the diffusion tube (8) is an inwardly concave arc-shaped tube, the inner diameter of the upper end of the diffusion tube (8) is larger than the inner diameter of the middle part of the diffusion tube (8) and smaller than the inner diameter of the lower end of the diffusion tube (8), the length from the middle part to the lower end of the diffusion tube (8) is larger than the length from the upper end to the middle, and the curvature of the upper pipe of the diffusion tube (8) is smaller than the curvature of the lower pipe of the diffusion tube (8).

8. The artificial wetland phytoremediation sewage treatment pool according to claim 1, characterized in that: A connecting bearing (6) is fixed to the lower end of the rotating disk (2); a support tube (7) is fixedly sleeved on the outer side of the connecting bearing (6); the connecting bearing (6) and the support tube (7) are both sleeved on the outside of the aeration tube (1); the inner wall of the connecting bearing (6) is rotatably connected to the outside of the aeration tube (1); and the lower end of the support tube (7) is fixed to the bottom of the aeration pond (200).

9. The artificial wetland phytoremediation sewage treatment pool according to claim 1, characterized in that: Artificial aquatic plants are arranged at the bottom of the stabilization pond (100) to form a huge microbial community. The entire pond is in an anaerobic state. Organic nitrogen is converted into ammonia nitrogen under the action of ammonifying bacteria to prepare for the subsequent nitrification reaction. At the same time, under the action of acid-producing bacteria, large molecular organic matter is hydrolyzed to improve the biodegradability of sewage. Suspended matter sinks in the stabilization pond under the action of gravity. The stabilization pond also serves to intercept suspended matter. The aeration pond (200) exchanges, mixes and reoxygenates water up and down, improves the bottom quality and activates the ecological function of the bottom mud; breaks the natural stagnant water zone formed by the thermocline, forms a circulating active water flow in the entire water body, and the high-concentration algae-containing water on the surface is transferred to the bottom and is suppressed, becoming bait for fish and shellfish; The sewage flows inside the wetland bed of the subsurface wetland (300), making full use of the biofilm grown on the surface of the ecological filler, the rich plant root system and the topsoil and the interception of the ecological filler to improve its treatment effect and treatment capacity, and utilizing the photosynthesis, absorption and root oxygen transfer of the plants to achieve good removal effects on organic matter and ammonia nitrogen; The surface flow wetland (400) has a rich variety of biological habitats such as swamps, shallow water, deep water and island habitats, and can form a multi-level food chain of bacteria and algae, aquatic plants, plankton, benthic animals and waterfowl, forming a complex ecosystem, thereby greatly improving the pollutant removal effect.

10. A construction process for an artificial wetland plant restoration sewage treatment pool, used for constructing an artificial wetland plant restoration sewage treatment pool according to any one of claims 1 to 9, characterized in that: First, a stabilization pond (100), an aeration pond (200), a subsurface flow wetland (300) and a surface flow wetland (400) are constructed by conventional construction methods, and corresponding pipelines are laid between the stabilization pond (100), the aeration pond (200), the subsurface flow wetland (300) and the surface flow wetland (400) to facilitate the transportation and transfer of the tail water that meets the standards; Secondly, a support pipe (7) with a hole is driven into the bottom of the aeration pond (200), and a connecting bearing (6) is fixed in the support pipe (7). The upper end of the aeration pipe (1) is then passed through the hole of the support pipe (7) and into the support pipe (7). The upper end of the aeration pipe (1) is passed through the middle of the connecting bearing (6) and is rotatably connected to the inner wall of the connecting bearing (6). The rotating disc (2) and the aeration disc (3) which are sealed and welded are further fixed on the connecting bearing (6) so that the rotating disc (2) and the aeration disc (3) are connected to each other. The bearing (6) is connected to the support pipe (7) to achieve a rotational connection, while ensuring that a sealed rotational connection is formed between the aeration pipe (1) and the rotating disk (2). At this point, the overall installation of the aeration mechanism (500) is completed. Further, a dispersion tube (8) is fixed above the aeration mechanism (500) by a bracket or other supporting body, so that the dispersion tube (8) stays at the tail end of the reverse vortex generated when the aeration mechanism (500) is in operation, thereby completing the construction of the artificial wetland plant restoration sewage treatment pool.

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