An artificial wetland sewage treatment assembled dam and sewage treatment method

Abstract

The present invention provides an assembled dam for artificial wetland sewage treatment, the dam comprising: at least two artificial wetland treatment pools; a stabilization pond connected in series with the artificial wetland treatment pool in the same filtration waterway, the stabilization pond being arranged at the end of the entire water treatment process; the artificial wetland treatment pool comprising an exposed top water inlet, a vegetation layer, a plant fixing layer, and a composite matrix layer; a dam body assembly for adjusting the filtration path being provided between two adjacent artificial wetland treatment pools; the dam body assembly comprising: a low-level regulating dam close to the water outlet end and a high-level regulating dam away from the water outlet end, with a buffer filtration pool provided between the two dams. The present invention achieves separate management of different artificial wetland treatment pools, simplifies the complexity of pipe network construction, and facilitates maintenance. Furthermore, the present invention can realize the mutual conversion of different types of artificial wetlands in sections by controlling the water level and controlling different purification flow layers, thereby specifically exerting the optimal sewage purification capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and more particularly to an assembled dam for artificial wetland sewage treatment and a sewage treatment method. Background Art

[0002] Since integrated sewage treatment equipment is often used in rural areas or small towns, and due to reasons such as maintenance and operating costs of integrated sewage treatment equipment and a lack of professional operation and maintenance personnel, the equipment is often rarely operated or even not operated at all. Alternatively, some rural areas have no sewage treatment facilities or only simple treatment facilities such as septic tanks. These simple sewage treatment facilities gradually age and lack maintenance over time. Moreover, due to historical reasons and the lack of coordinated drainage and sewage collection systems in a large number of self-built houses in recent years, the construction of pipeline networks is also complicated, making it impossible to achieve the goal of effective sewage treatment. In addition, many current artificial wetlands have long construction cycles, relatively rigid operating methods, lack flexibility, and are insufficient to respond to changes in sewage sources.

[0003] Constructed wetlands are artificially designed and constructed sewage treatment systems that simulate natural wetland ecosystems. Different types of constructed wetlands have varying advantages and disadvantages. Their basic principle is to utilize natural elements such as soil, plants, and microorganisms within the wetland to perform a triple purification process of wastewater through physical, chemical, and biological processes. This treatment method offers advantages such as low investment, low operating costs, environmental friendliness, and ease of maintenance, making it particularly suitable for sewage treatment in rural areas and small towns. Furthermore, constructed wetlands offer a positive ecological landscape and contribute to improving the overall quality of the surrounding environment.

[0004] Therefore, in order to solve the problems existing in the existing rural and small town sewage treatment, such as difficult sewage treatment construction, high operation and maintenance costs, complex pipeline construction, unstable water quality, insufficient flexibility and adaptability, and redundant processing capacity, the present invention provides an artificial wetland sewage treatment assembled dam and sewage treatment method, which can be quickly assembled and constructed according to the terrain, and the wetland type can be flexibly switched during operation to achieve the best effect, thereby effectively solving the problems existing in the existing technology. Summary of the Invention

[0005] The present invention aims to overcome at least one defect (shortcoming) of the above-mentioned prior art and provide an artificial wetland sewage treatment assembled dam and sewage treatment method to solve the problems of difficult sewage treatment construction in rural areas and small towns, high operation and maintenance costs, complex pipeline construction, unstable water quality and insufficient redundant treatment capacity.

[0006] The technical solution adopted by the present invention is an assembled dam for artificial wetland sewage treatment, the dam comprising:

[0007] At least two artificial wetland treatment pools shall be set up;

[0008] A stabilization pond is connected in series with the artificial wetland treatment pool in the same filtration channel, and the stabilization pond is set at the end of the entire water treatment process;

[0009] The artificial wetland treatment pool includes an exposed top water inlet, a vegetation layer, a plant fixing layer and a composite matrix layer;

[0010] A dam assembly for regulating the filtration path is provided between two adjacent artificial wetland treatment pools;

[0011] The dam body assembly comprises a low-position regulating dam close to the water outlet end and a high-position regulating dam far from the water outlet end, with a buffer filtering pool provided between the two dams.

[0012] In this application, by connecting multiple artificial wetland treatment pools in series and using dams to separate them, different artificial wetland treatment pools can be managed separately, which simplifies the complexity of pipeline construction and facilitates maintenance. In addition, the operating water level height and water flow direction of the artificial wetland treatment pool can be set by combining the dam body according to actual needs, so that the artificial wetland type of this section of artificial wetland treatment pool can be converted individually, so that the dam can exert its optimal sewage purification ability, ensure the stability of water quality, improve redundant processing capacity, and is also conducive to the continuous operation of the system. If maintenance is required on this section of plants, or during the winter freezing period, the wetland type can be switched from a composite type to a horizontal subsurface type to enable uninterrupted operation.

[0013] Preferably, the composite matrix layer includes at least two base layers with different porosity, and the porosity of the base layers gradually increases from top to bottom; optionally, in this embodiment, according to the different porosity of the base layers, the base layers can be set as a soil filter layer, a sand filter layer, a carbon residue filter layer and a gravel filter layer from top to bottom, etc. This layered setting and distribution method can facilitate the force of gas injection and bubble floating to impact each filter layer, eliminate blockage between the filter layers, and improve the efficiency of cleaning and anti-blocking.

[0014] By providing a base layer with varying pore sizes within the composite matrix layer, different filter matrices can be configured based on the size of the pores. Custom designs can also be tailored to specific pollutants or water quality issues, enhancing the purification unit's processing capacity and adapting to the purification needs of different water qualities. Furthermore, the multi-layered filter base layer can also share the purification load of each layer, reducing the pressure on a single purification layer, thereby extending the service life of the purification equipment and reducing maintenance costs. Furthermore, to further enhance purification capacity, a buffer filter pool and a stabilization pond are also provided in this system. The buffer filter pool can be filled with a porous matrix, such as coal slag, graded gravel, or other commonly used matrix materials. This essentially changes the traditional artificial wetland matrix from a horizontal to a vertical layout, partially resolving the problem of the wetland matrix being difficult to replace. In addition to filtering upstream water, the pool also regulates downstream water volume, making its flow more balanced and achieving optimal treatment results. The stabilization pond relies on natural biological purification to continue purification. Landscape design can be combined with artificial floating islands planted with highly effective ornamental plants to further enhance water quality.

[0015] Preferably, both the high-position regulating dam body and the low-position regulating dam body are provided with installation positions penetrating both sides of the dam body, and multi-section layered valve body units are provided in the installation positions, and the multi-section layered valve body units are provided with several water level regulating valves in a side-by-side combination manner.

[0016] Therefore, the water flow in the dam body can be controlled by setting the number of communication groups in the water level regulating valve, thereby controlling the water level, effectively solving the problem of unstable water level control caused by unstable water inflow or even large fluctuations.

[0017] Preferably, the water level regulating valve comprises a hollow vertical valve body and a strip-shaped valve core, wherein the strip-shaped valve core is rotatably mounted in the vertical valve body;

[0018] The strip valve core is provided with a plurality of vertically distributed communication groups, and a separation limit ring is provided between any two communication groups to divide different communication groups into different levels. Each communication group includes a plurality of communication channels, and the directions and heights of the communication channels in different communication groups are different.

[0019] The vertical valve body is provided with a blocking side and a conducting side and a detachable rotating handle on the top, and the blocking side and the conducting side are respectively provided with a water inlet and a water outlet corresponding to the connecting channel. By rotating the rotating handle, the connecting channel in the connecting group can be controlled to correspond to the water inlet and the water outlet, so that different connecting groups can be used to control the flow direction and flow of water in different purification flow layers.

[0020] In existing conventional water tanks, water levels are generally controlled by controlling valve flow. However, when the inlet flow changes dynamically, this conventional method of controlling the outlet valve flow is relatively complex and the feedback action is delayed. The water level regulating valve in this application uses the method of setting the water level overflow height by the deviation angle of the channels at different heights of the same valve body to control the water level. By setting a separation limit ring on the strip valve core, each connection group is set at a different level, and the orientation of each connection group is set differently. By controlling different connection groups to be connected at different times, selective on-off control of purification flow layers at different heights can be achieved. The structure is simple, the operation is convenient, the control is reliable, and after setting, unmanned operation can be achieved.

[0021] Preferably, an aeration backwash pipe network is further provided at the bottom of the artificial wetland treatment pool, and the aeration backwash pipe network is composed of a plurality of air guide nozzles and an air supply pipe network.

[0022] In this application, aeration is achieved through an aeration backwash network. The aeration backwash network is a two-in-one aeration and backwash device. Aeration accelerates water purification while simultaneously utilizing the upward buoyancy of bubbles to flush out blockages in the interstices of the substrate layer, effectively resolving existing problems in sewage treatment systems. In conventional sewage treatment systems, aeration devices are only installed in aeration tanks or regulating tanks, and are not installed in artificial wetland treatment tanks. Currently, patents show that backwashers are installed within the substrate layer of wetland treatment tanks, with water as the flushing medium. However, experiments have found that this backwash method can cause problems such as excessive water flow, which can disperse the substrate and knock down plants; if the water flow is too low, the flushing water flow will flow laterally with the main water body, resulting in poor flushing effectiveness. The present invention, however, uses bubble flushing, which can increase the oxygen content of the water body and promote biological activity. It can also utilize the upward buoyancy of water bubbles to lift flocs blocked in the interstices of the substrate to the surface. This is relatively slow but continuous and effective method, avoiding the drawbacks of water flushing.

[0023] Preferably, the air guide nozzle is funnel-shaped, comprising an air jet plane provided at a wide opening and containing a plurality of air jet holes, and an air inlet provided at a narrow opening;

[0024] The jet plane is arranged horizontally and upwards and is buried in the bottommost matrix; the air inlet is connected to the air supply network for transmitting the air source;

[0025] A movable closing member for controlling the connection between the jet hole and the air inlet is also provided between the jet plane and the air inlet; the closing member is composed of a flexible wrapping layer and a counterweight core provided in the flexible wrapping layer, and the height of the closing member is less than or equal to the distance between the wide opening and the narrow opening of the air guide nozzle.

[0026] The airflow formed on the jet plane of the air-guiding nozzle has a certain flushing force, which can not only realize the basic function of aeration, but also prevent the aeration backwash pipe network from being blocked; and the closure involved realizes the on-off control between the air outlet and the air inlet by means of gravity self-sealing, thereby achieving the effect of preventing backflow and blocking. At the same time, the pores of the jet holes are small, and impurity particles such as suspended matter and mud are not easy to enter; even if impurity particles enter the air outlet, they move upward with the air flow during aeration, and are blocked by the counterweight sealing block after the aeration is completed, thereby effectively preventing the blockage of pipes or equipment in the long term. The protective net at the top of the nozzle not only protects the nozzle, but also divides the ejected gas into several tiny bubbles, accelerates the dissolved oxygen in the water, and also facilitates the bubbles to enter the gaps in the matrix to help blockages float up. This design reduces maintenance costs and improves the operating efficiency and stability of the entire system.

[0027] Preferably, a floating island is provided in the artificial wetland treatment pool, and the vegetation layer and the fixed plant layer are provided in the floating island. By providing the floating island, the vegetation can be kept at the top layer of the artificial wetland treatment pool, thereby purifying the surface water and keeping the water clean.

[0028] Further preferably, the floating island comprises:

[0029] The floating body is arranged at the bottom of the floating island and has buckles on its side. The buckles are connected to the buckles by using fasteners to connect several floating islands to form a sheet covering the artificial wetland treatment pool.

[0030] a purification channel vertically arranged on the floating body and passing through the upper and lower ends of the floating body, wherein the purification channel gradually decreases from top to bottom;

[0031] The purification unit is assembled and arranged on the purification channel. The vegetation layer and the plant fixed layer are arranged in the purification unit and are used to purify the sewage input into the artificial wetland treatment pool.

[0032] In floating islands, if a purification unit fails or its filtration performance deteriorates, it can be quickly replaced or added. This facilitates maintenance and replacement, allowing for quick replacement of plants within the units and the rapid adjustment of plant combinations to suit different holiday or seasonal landscape requirements, achieving landscape diversity and continuous beautification.

[0033] Preferably, a quick-install filter module is installed at the outlet of the buffer filtration tank and the stabilization pond. The quick-install filter module can be quickly installed and removed, and high-efficiency substrates (such as carbon residue, activated carbon, etc.) can be replaced to meet the purification needs brought about by changes in sewage, such as sudden pesticide pollution, grease pollution, and other emergency purification needs, and can also further improve the sewage purification effect and efficiency.

[0034] On the other hand, the present application also provides a sewage treatment method based on the above-mentioned artificial wetland sewage treatment assembled dam body, the method comprising:

[0035] S1: Sewage enters the artificial wetland treatment pool from the exposed top water inlet and is purified by passing through the vegetation layer, plant fixed layer and composite matrix layer in sequence;

[0036] S2: Monitor the pollution concentration and water volume of the artificial wetland treatment pool: When the monitoring results show low concentration and small water volume, the high-level channel of the water level regulating valve can be opened to switch to the surface flow artificial wetland type; when the monitoring results show moderate pollution and medium water volume, the middle-level channel of the water level regulating valve can be opened to switch the wetland type to the subsurface flow type; when the monitoring results show heavy pollution and large water volume, the low-level channel of the water level regulating valve can be opened to switch to the composite wetland;

[0037] S3: The water enters the buffer filtration pool from the channel set in step S2 for temporary storage, and then enters the next level artificial wetland treatment pool to repeat the operations of steps S1-S2;

[0038] S4: After the wastewater has passed through all the artificial wetland treatment stages, it flows into a stabilization pond, where it continues to be purified by natural biological processes. The stabilization pond can be repurposed from a natural lake. When the water reaches Class A discharge standards, it flows out of the stabilization pond's outlet and is discharged into natural water bodies.

[0039] In this application, the pollution concentration and water volume of the artificial wetland treatment pool are first monitored. According to the desired artificial wetland type and the monitoring results, the number of water level regulating valves opened and the conduction of different levels of connection groups on the water level regulating valves can be controlled to control the water flow and select different types of artificial wetlands, thereby realizing different types of conversion of the same artificial wetland section. By changing the type of artificial wetland and the direction of water flow, the blockage rate of the matrix layer will be greatly reduced, the water treatment capacity of the wetland section will be stabilized, and the different operational requirements of the actual artificial wetland will be met, so that the artificial wetland can play its greatest advantages and greatly improve the water purification effect.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] By installing an assembled dam for artificial wetland sewage treatment, the constructed wetland is rapidly constructed and easily maintained. Furthermore, a water level regulating valve can be used to set the operating water level and flow direction of the constructed wetland according to actual purification needs, thereby selecting and switching the type of constructed wetland in that section, allowing the wetland to maximize its sewage purification capacity. Furthermore, system operation can be maintained even during harvesting, plant management, and winter ice conditions, ensuring stable sewage treatment and increasing redundant processing capacity.

[0042] The above-mentioned prefabricated dam is used to realize sewage purification treatment. The water level is monitored and the multi-section layered valve body units on the dam body are adjusted according to the monitoring results. The flow of the water body can be controlled by adjusting the number of multi-channel water level regulating valves that are opened, which effectively solves the problem of unstable water inflow or even large fluctuations leading to unstable water level control; then, by turning the rotating handle, the connecting channels in the different levels of connection groups can be controlled to correspond to the water inlet and outlet, so that different connection groups can be connected according to the adjustment needs, so that different purification flow layers can be selectively controlled to be on and off, thereby realizing the conversion of different types of wetlands, reducing the difficulty of sewage treatment construction and operation and maintenance costs, and improving the sewage treatment purification capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A schematic diagram of the assembled dam structure provided in this embodiment;

[0044] Figure 2 A schematic diagram of the cross-sectional structure of the assembled dam provided in this embodiment;

[0045] Figure 3 A schematic diagram of the combined structure of the dam provided in this embodiment;

[0046] Figure 4 A schematic diagram of the water level regulating valve structure provided in this embodiment;

[0047] Figure 5 A schematic diagram of the strip valve core structure provided in this embodiment;

[0048] Figure 6 A schematic diagram of the vertical valve body structure provided in this embodiment;

[0049] Figure 7 A schematic diagram of the aeration backwash pipe network structure provided in this embodiment;

[0050] Figure 8 A schematic diagram of the structure of the air guide nozzle provided in this embodiment;

[0051] Figure 9 A schematic diagram of a single floating island structure provided for this embodiment;

[0052] Figure 10 A schematic diagram of a structure including several floating islands provided for this embodiment;

[0053] Figure 11 A schematic diagram of the telescopic flow guide tube structure provided in this embodiment;

[0054] Figure 12 A schematic diagram of the purification unit structure provided in this embodiment;

[0055] Figure 13This is a schematic diagram of the structure of the quick-install filter module provided in this embodiment.

[0056] Description of the drawings: artificial wetland treatment pool 1; stabilization pond 2; vegetation layer 3; plant fixing layer 4; composite matrix layer 5; dam body assembly 6; low-level regulating dam 7; high-level regulating dam 8; buffer filter pool 9; water level regulating valve 10; vertical valve body 11; strip valve core 12; connecting group 13; separation limit ring 14; connecting channel 15; blocking side 16; conducting side 17; rotating handle 18; water inlet 19; water outlet 20; outer extension 21; aeration backwash pipe network 22; air guide nozzle 23; air supply pipe network 24; jet plane 25; air inlet 26; closure 27; floating island 28; floating body 29; buckle 30; hanging buckle 31; accommodating chamber 32; guide drain outlet 33; telescopic guide pipe 34; closing door 35; locking bracket 36; purification channel 37; purification unit 38; snap structure 39; handle 40; installation position 41; quick-install filter module 42. DETAILED DESCRIPTION

[0057] The accompanying drawings are for illustrative purposes only and are not to be construed as limiting the present invention. To better illustrate the following embodiments, some components in the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will appreciate that some well-known structures and their descriptions may be omitted from the accompanying drawings.

[0058] Example 1

[0059] like Figure 1 As shown, this embodiment provides an assembled dam for artificial wetland sewage treatment, the dam comprising:

[0060] Artificial wetland treatment pool 1, at least two;

[0061] The stabilization pond 2 is connected in series with the artificial wetland treatment pool 1 in the same filtering waterway, and the stabilization pond 2 is arranged at the end of the entire water treatment process;

[0062] The artificial wetland treatment pool 1 includes an exposed top water inlet, a vegetation layer 3, a plant fixing layer 4 and a composite matrix layer 5;

[0063] A dam assembly 6 for adjusting the filtration path is provided between two adjacent artificial wetland treatment pools 1;

[0064] The dam assembly 6 includes a low-position regulating dam 7 close to the water outlet end and a high-position regulating dam 8 far from the water outlet end, with a buffer filter pool 9 provided between the two dams.

[0065] In the present application, multiple artificial wetland treatment pools 1 are connected in series and separated by dams, so that different artificial wetland treatment pools 1 can be managed separately, simplifying the complexity of pipeline construction and facilitating maintenance. In addition, the operating water level height and water flow direction of the artificial wetland treatment pool 1 can be set using the dam body combination 6 according to actual needs, so as to convert the artificial wetland type of this section of artificial wetland treatment pool separately, so that the dam can specifically exert its optimal sewage purification capacity, ensure the stability of water quality, improve redundant processing capacity, and also facilitate the continuous operation of the system. If maintenance is required on this section of plants, or during the winter freezing period, the wetland type can be switched from a composite type to a horizontal subsurface type to enable uninterrupted operation.

[0066] Preferably, the composite matrix layer 5 comprises at least two base layers with different pores, and the pores of the base layers gradually increase from top to bottom; Figure 1 It can be seen that the side walls of the buffer filtration pool 9 and the stabilization pond 2 are set to be inclined so that the substances precipitated in the water body can be concentrated at the bottom of the pool for easy cleaning, and the stabilization pond 2 can be rebuilt from a natural lake, and its natural organisms can be used for purification.

[0067] By providing a base layer with different pore sizes within the composite matrix layer 5, different filter matrices can be provided based on the size of the pores. This allows for customized designs for specific pollutants or water quality issues, enhancing the purification unit's processing capacity and adapting to the purification needs of different water qualities. Furthermore, providing multiple layers of filter base layers can share the purification load of each layer, reducing the pressure on a single purification layer, thereby extending the service life of the purification equipment and reducing maintenance costs. Furthermore, to further enhance purification capacity, a buffer filter pool 9 and a stabilization pond 2 are provided to further precipitate substances in the water. The buffer filter pool 9 can be filled with a porous matrix, such as coal slag, graded gravel, or other commonly used matrix materials. This essentially replaces the traditional artificial wetland matrix with a vertical one, partially resolving the problem of difficult wetland matrix replacement. In addition to filtering upstream water, the pool also regulates downstream water flow, making it more balanced and achieving optimal treatment results. The stabilization pond 2 relies on natural biological purification to continue purification. This can be combined with landscape design, using artificial floating islands planted with highly efficient purification plants to further improve water quality.

[0068] Preferably, if Figure 3 As shown, Figure 3 The schematic diagram of the dam body combination structure provided in this embodiment shows that installation positions penetrating both sides of the dam body are provided in the high-position regulating dam body 8 and the low-position regulating dam body 7, and multi-section layered valve body units are provided in the installation positions. The multi-section layered valve body units are provided with a plurality of water level regulating valves 10 in a side-by-side combination.

[0069] Therefore, the water flow rate can be controlled by setting the number of communication groups in the water level regulating valve 10 in the dam body, thereby controlling the water level, effectively solving the problem of unstable water level control caused by unstable water inflow or even large fluctuations.

[0070] Preferably, if Figure 4 As shown, Figure 4 This is a schematic structural diagram of a water level regulating valve provided in this embodiment. The water level regulating valve 10 comprises a hollow vertical valve body 11 and a strip-shaped valve core 12, wherein the strip-shaped valve core 12 is rotatably mounted in the vertical valve body 11;

[0071] like Figure 5 As shown, Figure 5 A schematic diagram of the strip valve core structure provided in this embodiment, wherein the strip valve core 12 is provided with a plurality of vertically distributed connecting groups 13, and a separating limit ring 14 is provided between any two connecting groups 13, and the separating limit ring 14 is used to limit the strip valve core 12 in the vertical valve body 11 and separate different connecting groups 13; compared with the strip valve core 12 being limited in the vertical valve body 11 by itself, the use of the separating limit ring 14 can reduce the volume of the strip valve core 12, thereby saving materials and reducing production costs; at the same time, due to the provision of the separating limit ring 14, friction between the side of the strip valve core 12 and the inner wall of the vertical valve body 11 is avoided, thereby reducing wear, extending its service life, and reducing repair and maintenance costs.

[0072] In this embodiment, if Figure 5 As shown, the strip valve core 12 is set as a cylinder, and three connecting groups 13 are set. Each connecting group 13 includes three connecting channels 15. The outlets of the connecting channels 15 are set on the cylindrical wall of the strip valve core 12 for water to flow through. Its shape includes but is not limited to being circular, and the orientation and height of the connecting channels 15 in different connecting groups 13 are different. The provision of multiple connecting channels 15 can improve water flow efficiency and prevent blockage. At the same time, compared with the provision of a single connecting channel 15, multiple connecting channels 15 can divert water flow, reduce the impact of water flow on the valve body, and facilitate valve body maintenance. The horizontal arrangement of the connecting channels 15 facilitates its height control and improves the accuracy of height control. The distance between two adjacent connecting copper strips is equal, so that the flow of water is evenly distributed when flowing through the connecting group 13, further reducing the impact of water on the valve body, especially when the valve body is open. Different connecting channels 15 are distributed in the vertical direction, so that different heights of the purification flow layer can be connected, thereby making the water body evenly distributed in the purification flow layer; the connecting channels 15 in the same connecting group 13 are oriented in the same direction, so that the connecting channels 15 in the same connecting group 13 can be opened synchronously, increasing the connection speed.

[0073] like Figure 6 As shown, Figure 6The two vertical valve body structures provided in this embodiment are schematically shown in FIG. Figure 4-5 In this embodiment, the outer wall of the vertical valve body 11 is configured to be square or circular, and is provided with a blocking side 16 and a conducting side 17, as well as a removable rotary handle 18 on the top. The blocking side 16 is provided with an outer extension 21. The provision of the outer extension 21 and its extension facilitates the fixing of the strip valve core 12 to the dam body assembly 6, improving its stability and preventing loosening under long-term water flow impact, thereby improving its reliability. Furthermore, the outer extension 21 is provided with a mounting hole, and the dam body is also provided with a circular hole corresponding to the mounting hole. Fasteners pass through the mounting hole and the corresponding circular hole to fix the vertical valve body 11 to the dam body.

[0074] And by rotating the handle 18, the strip valve core 12 is rotated. When the connecting channel 15 on the valve core corresponds to the water inlet 19 and the water outlet 20 of the vertical valve body 11, the corresponding connecting group 13 is connected. When the connecting channel 15 is completely staggered with the water inlet 19 and the water outlet 20 of the vertical valve body 11, the corresponding connecting group 13 is closed. In this way, by adopting the form of one valve with multiple water outlets at different heights, the stability of multi-water level control is automatically achieved, the operation is simple, and the mutual conversion of different artificial wetland types is realized, and the extended functions of artificial wetlands such as sewage treatment, flood storage, water storage, and landscaping can be further exerted.

[0075] In existing conventional water pools, water levels are generally controlled by controlling valve flow. However, when the inlet flow changes dynamically, this conventional method of controlling the outlet valve flow is relatively complicated and the feedback action is delayed. In the present application, the water level regulating valve uses channels of different heights in the same valve body to set the water level overflow height by using a deviation angle method, thereby controlling the water level. By setting a separation limit ring on the strip valve core, each connection group is set at a different level, and the orientation of each connection group 13 is also set differently. By controlling different connection groups 13 to be turned on at different times, selective on-off control of purification flow layers at different heights can be achieved to convert different wetland types. The structure is simple, the operation is convenient, the control is reliable, and after setting, unmanned operation can be achieved.

[0076] Preferably, if Figure 7 As shown, Figure 7 This is a schematic diagram of the aeration backwash pipe network structure provided in this embodiment. An aeration backwash pipe network 22 is also provided at the bottom of the artificial wetland treatment pool 1. The aeration backwash pipe network 22 consists of a plurality of air guide nozzles 23 and an air supply pipe network 24.

[0077] In this application, aeration is achieved through the provision of an aeration backwash network 22, which is a two-in-one aeration and backwash device. Aeration accelerates water purification while simultaneously utilizing the upward buoyancy of bubbles to flush out blockages in the interstices of the substrate layer, effectively resolving the problem of substrate blockage in existing artificial wetland systems. In conventional sewage treatment systems, aeration devices are typically only provided in aeration tanks or regulating tanks, and are not provided in artificial wetland treatment tanks. Currently, patents indicate that backwashers are provided within the substrate layer of wetland treatment tanks, with water being the flushing medium. However, experiments have shown that this method can cause problems such as excessive water flow, which can disperse the substrate and knock down plants; and excessive water flow, which can cause the flushing water to flow laterally with the main water body, resulting in poor flushing effectiveness. The present invention, however, utilizes bubble flushing, which increases the oxygen content of the water body and promotes the growth of aerobic microorganisms. It also utilizes the upward buoyancy of water bubbles to lift flocs blocked in the interstices of the substrate upward, resulting in a relatively slow but sustained and effective flushing method that avoids the drawbacks of water flushing.

[0078] Preferably, if Figure 8 As shown, Figure 8 This is a schematic diagram of the structure of the air guide nozzle provided in this embodiment. The air guide nozzle 23 is funnel-shaped and includes an air injection plane 25 provided at the wide mouth and containing a plurality of air injection holes, and an air inlet 26 provided at the narrow mouth;

[0079] The jet plane 25 is arranged horizontally and upward and is buried in the lowest substrate layer; the air inlet 26 is connected to the air supply network 24 for transmitting the air source; the air flow impact on the jet plane 25 can generate a strong scouring force, which can not only achieve the basic function of aeration, but also prevent the aeration backwash network 22 from being blocked;

[0080] A movable closure 27 for controlling the on-off connection between the jet hole and the air inlet 26 is also provided between the jet plane 25 and the air inlet 26. The closure 27 controls the on-off connection between the air outlet and the air inlet 26 by self-sealing due to gravity, thereby preventing backflow and blockage. At the same time, the jet holes of the jet plane 25 have small pores, making it difficult for suspended matter, mud, and other impurity particles to enter. Even if impurity particles enter the air outlet, they will move upward with the air flow during aeration, and will be blocked by the counterweight closure block after the aeration is completed, thereby effectively preventing the blockage of pipes or equipment in the long term. The protective net at the top of the nozzle not only protects the nozzle, but also separates the ejected gas into several tiny bubbles, accelerating the dissolved oxygen in the water, and facilitating the bubbles to enter the gaps in the matrix to help blockages float up. This design reduces maintenance costs and improves the operating efficiency and stability of the entire system.

[0081] Optionally, the closure member 27 provided in this embodiment has an arc surface on at least one side facing the jet plane 25. When air is supplied, the closure member is suspended between the jet plane 25 and the air inlet 26. The arc surface structure of the closure member 27 is conducive to guiding part of the airflow from the inner wall below the air guide nozzle 23 near the air inlet 26 to the axis center, ensuring that the airflow passes evenly through the multiple jet holes on the jet plane 25, thereby responding quickly after the air supply starts, allowing the jet holes to quickly release a large flow of airflow to prevent blockage.

[0082] In this embodiment, the closure member 27 comprises a flexible rubber coating and a steel counterweight core disposed within the flexible coating. The rubber layer serves both corrosion protection and sealing functions. The flexible coating prevents the closure member 27 from colliding with and damaging the jet plane 25 or the air guide cavity, while also enhancing the sealing effect. Furthermore, the height of the closure member 27 is set to be less than or equal to the distance between the wide and narrow openings of the air guide nozzle 23. By limiting the height of the closure member 27, its movement trajectory is effectively controlled, ensuring that it remains suspended between the jet plane 25 and the air inlet 26 during aeration. This optimizes on / off switching, improves response speed, and prevents backflow.

[0083] Optionally, in this embodiment, the air guide nozzle 23 is set to be funnel-shaped, the air jet plane 25 for air outlet is set at the wide mouth, and the air inlet is set at the narrow mouth, so that the cross-section of the air guide nozzle 23 gradually increases from bottom to top, so that the air jet plane 25 is guided and expanded, which is conducive to ensuring that the gas can gradually diffuse during the flow process, forming a uniform air flow distribution, and improving the operating efficiency of the device. In addition, the air jet holes with a circular cross-section and a diameter of 3 mm are evenly distributed on the air jet plane 25, which can prevent deposition and blockage, and at the same time enhance the scouring force, ensuring that the gas can be smoothly ejected through the air jet holes, and forming a number of fine bubbles at the same time, which is conducive to dissolved oxygen and also conducive to the bubbles entering the matrix gap.

[0084] Optionally, the sealing member 27 is configured to be spherical, and the air inlet 26 is configured to be truncated cone-shaped. When the sealing member 27 and the air inlet 26 are mated, the height of the sealing member 27 within the air inlet 26 is within a range of one-quarter to one-sixth of the height of the sealing member 27. This design ensures a good sealing effect when the sealing member 27 is mated with the air inlet 26, while reducing manufacturing difficulty and cost.

[0085] Preferably, if Figure 9 As shown, Figure 9This is a schematic diagram of a single floating island structure provided in this embodiment. The constructed wetland treatment pool 1 is provided with a floating island 28, and the vegetation layer 3 and the fixed plant layer 4 are disposed within the floating island 28. The provision of the floating island 28 maintains vegetation at the topmost layer of the constructed wetland treatment pool 1, purifying the surface water and keeping it clean.

[0086] More preferably, Figure 10 As shown, Figure 10 The structural diagram of several floating islands provided in this embodiment is combined with the attached Figure 9 It can be seen that the floating island 28 includes:

[0087] A floating body 29 is provided at the bottom of the floating island 28 and has a buckle 30 on its side. A hook 31 is used to connect to the buckle 30, thereby connecting several floating islands 28 to form a sheet covering the artificial wetland treatment pool 1. A surrounding ridge is also provided on the edge of the top surface of the floating body 1. The surrounding ridge and the top surface of the floating body 1 form a receiving cavity 32. The side of the surrounding ridge is provided with a guide drain outlet 33. The guide drain outlets 33 of different floating islands 28 are connected by a telescopic guide pipe 34, so that the receiving cavities 32 of different floating islands 28 are connected, and the purified water can be quickly distributed to prevent it from overflowing. It can also resist the vibration or impact of external water waves, reduce the impact of vibration and impact on the purification device, protect the equipment and extend its service life.

[0088] Optionally, in this embodiment, the floating body 29 can be made of plastics such as polyethylene (PE) and polypropylene (PP). These materials have minimal impact on the aquatic environment and are durable. Plastics are also lightweight, corrosion-resistant, inexpensive, and easily processed into various shapes and sizes. However, the material is not limited to plastic; it can also be made of natural materials or other materials that provide buoyancy. When designing the floating island 28, the desired materials can be selected and combined based on specific requirements and environmental conditions, ensuring that the floating body 29 can support the entire floating island 28, allowing it to float on the water surface and filter and purify various overhead drainage or rainfall.

[0089] like Figure 11 As shown, Figure 11 The telescopic guide tube structure diagram provided in this embodiment is combined with the attached Figure 9-10 As shown, closed doors 35 are provided at both ends of the telescopic guide tube 34. Locking brackets 36 are provided on the closed doors 35 to control the opening and closing of the closed doors 35. The locking brackets 36 control the opening and closing of the closed doors 35, allowing for quick disconnection and connection between different floating islands 28. This allows for rapid distribution of water within the accommodating chamber 32, preventing overflow of the purified water. This provides for a wide range of applications and facilitates maintenance.

[0090] like Figure 12 As shown, Figure 12 The schematic diagram of the purification unit structure provided in this embodiment shows that a purification channel 37 is provided in the floating island 28. The purification channel 37 is vertically arranged on the floating body 29 and runs through both ends of the floating body 29. The purification channel 37 gradually decreases from top to bottom. The purification unit 38 is adapted to the purification channel 37 and is assembled on the purification channel 37. The vegetation layer 3 and the plant fixing layer 4 are provided in the purification unit 38 to purify the sewage input into the artificial wetland treatment tank 1. Optionally, in the purification unit 38, the filling material in the plant fixing layer 4 can be set as crushed stone or charcoal slag, so that under the action of gravity, it can stabilize the roots of the plants planted in the vegetation layer and improve the stability of the device.

[0091] A snap-fit ​​structure 39 is also provided on the upper portion of each purification unit 38. The purification unit 38 engages with the float body 29, and the snap-fit ​​structure 39 abuts the top surface of the float body 29. The snap-fit ​​structure 39 also has a mounting position 41 for engaging with a handle 40. In this embodiment, the snap-fit ​​structure 39 abuts the top surface of the float body 29, allowing each purification unit 38 mounted on the float body 29 to operate independently and without interfering with each other. This also allows the purification unit 38 to be flexibly connected to the float body 29, facilitating maintenance. The snap-fit ​​structure 39 also has a mounting position 41 for engaging with a handle 40. When maintenance is required on a purification unit 38, the entire unit 38 can be directly removed from the purification system using the handle 40 for replacement or maintenance. This ensures the continued stable operation of the purification system, reduces operating costs, and improves economic efficiency. Plants planted in the purification units can also be quickly replaced and their plant combinations adjusted to suit the landscape needs of different festivals or seasons, achieving diverse and continuously beautifying landscapes.

[0092] Preferably, if Figure 13 As shown, Figure 13 The schematic diagram of the quick-install filter module structure provided in this embodiment shows that a quick-install filter module 42 is provided at the water outlet of the buffer filter tank 9 and the stabilization pond 2. The quick-install filter module can be quickly installed and disassembled, and high-efficiency matrices (such as carbon residue, activated carbon, etc.) can be replaced to meet the purification needs brought about by changes in sewage, such as sudden pesticide pollution, grease pollution and other emergency purification needs, and can also further improve the sewage purification effect and efficiency.

[0093] Example 2

[0094] This embodiment also provides a sewage treatment method based on the artificial wetland sewage treatment assembled dam body described in Example 1, such as Figure 2 As shown in the provided structure, the method includes:

[0095] Step S1: Sewage enters the artificial wetland treatment pool 1 from the exposed top water inlet and is purified by passing through the vegetation layer 3, the plant fixed layer 4 and the composite matrix layer 5 in sequence;

[0096] Step S2: monitoring the pollution concentration and water volume of the artificial wetland treatment pool 1: when the monitoring result shows that the concentration is low and the water volume is small, the high-level channel of the water level regulating valve can be opened to switch to the surface flow artificial wetland type; when the monitoring result shows that the pollution is moderate and the water volume is medium, the middle-level channel of the water level regulating valve can be opened to switch the wetland type to the subsurface flow type; when the monitoring result shows that the pollution is heavy and the water volume is large, the low-level channel of the water level regulating valve can be opened to switch to the composite wetland;

[0097] Step S3: The water enters the buffer filter tank 9 from the channel set in step S2 for temporary storage, and then enters the next level artificial wetland treatment tank 1 to repeat the operations of steps S1-S2;

[0098] Step S4: After the sewage has passed through all artificial wetland treatment links, it flows into the stabilization pond 2 and continues to be purified by natural biological purification function. The stabilization pond 2 can also be rebuilt using a natural lake. When the water body reaches a certain storage volume, the water body flows out from the outlet of the stabilization pond 2 to obtain the final purified water body.

[0099] Therefore, in this embodiment, by monitoring the pollution concentration and water volume of the artificial wetland treatment pool 1, the number of water level regulating valves 10 opened and the conduction of different levels of connection groups on the water level regulating valve 10 are controlled according to the required artificial wetland type and the monitoring results, so as to realize the control of water flow and the selective on and off control of different purification flow layers, thereby realizing different types of conversions of the same section of artificial wetland and changing the direction of water flow, which will greatly reduce the blockage rate of the matrix layer, stabilize the water treatment capacity of this section of wetland, meet the different needs of operations in actual artificial wetlands, enable artificial wetlands to give full play to their greatest advantages, and greatly improve the water purification effect.

[0100] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific implementation methods of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. An artificial wetland sewage treatment assembled dam, characterized in that: The dam includes: At least two artificial wetland treatment pools shall be set up; A stabilization pond is connected in series with the artificial wetland treatment pool in the same filtration channel, and the stabilization pond is set at the end of the entire water treatment process; The artificial wetland treatment pool includes an exposed top water inlet, a vegetation layer, a plant fixing layer and a composite matrix layer; A dam assembly for regulating the filtration path is provided between two adjacent artificial wetland treatment pools; The dam body assembly includes: a low-position regulating dam close to the water outlet end and a high-position regulating dam far from the water outlet end, with a buffer filter pool provided between the two dams; The high-position regulating dam body and the low-position regulating dam body are both provided with installation positions penetrating both sides of the dam body, and the installation positions are provided with multi-section layered valve body units, and the multi-section layered valve body units are provided with a plurality of water level regulating valves in a side-by-side combination manner; The water level regulating valve comprises a hollow vertical valve body and a strip-shaped valve core, wherein the strip-shaped valve core is rotatably mounted in the vertical valve body; The strip valve core is provided with a plurality of vertically distributed communication groups, and a separation limit ring is provided between any two communication groups to divide different communication groups into different levels. Each communication group includes a plurality of communication channels, and the directions and heights of the communication channels in different communication groups are different. The vertical valve body is provided with a blocking side and a conducting side and a detachable rotating handle on the top, and the blocking side and the conducting side are respectively provided with a water inlet and a water outlet corresponding to the connecting channel. By rotating the rotating handle, the connecting channel in the connecting group can be controlled to correspond to the water inlet and the water outlet, so that different connecting groups can be used to control the flow direction and flow rate of water in different height purification flow layers.

2. The artificial wetland sewage treatment assembled dam according to claim 1, characterized in that: The composite matrix layer comprises at least two base layers with different pores, and the pores of the base layers gradually increase from top to bottom.

3. The artificial wetland sewage treatment assembled dam according to claim 2, characterized in that: An aeration backwash pipe network is also provided at the bottom of the artificial wetland treatment pool. The aeration backwash pipe network is composed of a number of air guide nozzles and an air supply pipe network.

4. The artificial wetland sewage treatment assembled dam according to claim 3, characterized in that: The air guide nozzle is funnel-shaped and includes an air jet plane provided at a wide opening and containing a plurality of air jet holes, and an air inlet provided at a narrow opening; The jet plane is arranged horizontally upward and corresponds one-to-one with the pores arranged at the bottom of the base layer; the air inlet is connected to the air supply network for transmitting the air source; A movable closing member for controlling the connection between the jet hole and the air inlet is also provided between the jet plane and the air inlet; the closing member is composed of a flexible wrapping layer and a counterweight core provided in the flexible wrapping layer, and the height of the closing member is less than or equal to the distance between the wide opening and the narrow opening of the air guide nozzle.

5. The artificial wetland sewage treatment assembled dam according to claim 1, characterized in that: A floating island is provided in the artificial wetland treatment pool, and the vegetation layer and the plant fixed layer are arranged in the floating island.

6. The artificial wetland sewage treatment assembled dam according to claim 5, characterized in that: The floating island comprises: The floating body is arranged at the bottom of the floating island and has buckles on its side. The buckles are connected to the buckles by using fasteners to connect several floating islands to form a sheet covering the artificial wetland treatment pool. a purification channel vertically arranged on the floating body and passing through the upper and lower ends of the floating body, wherein the purification channel gradually decreases from top to bottom; The purification unit is assembled and arranged on the purification channel. The vegetation layer and the plant fixed layer are arranged in the purification unit and are used to purify the sewage input into the artificial wetland treatment pool.

7. The artificial wetland sewage treatment assembled dam according to claim 1, characterized in that: The water outlets of the buffer filtration pool and the stabilization pond are provided with quick-install filtration modules.

8. A sewage treatment method based on the artificial wetland sewage treatment assembled dam according to any one of claims 1 to 7, characterized in that: The method comprises: S1: Sewage enters the artificial wetland treatment pool from the exposed top water inlet and is purified by passing through the vegetation layer, plant fixed layer and composite matrix layer in sequence; S2: Monitor the pollution concentration and water volume of the artificial wetland treatment pool: When the monitoring results show low concentration and small water volume, the high-level channel of the water level regulating valve can be opened to switch to the surface flow artificial wetland type; when the monitoring results show moderate pollution and medium water volume, the middle-level channel of the water level regulating valve can be opened to switch the wetland type to the subsurface flow type; when the monitoring results show heavy pollution and large water volume, the low-level channel of the water level regulating valve can be opened to switch to the composite wetland; S3: The water enters the buffer filtration pool from the channel set in step S2 for temporary storage, and then enters the next level artificial wetland treatment pool to repeat the operations of steps S1-S2; S4: After the sewage passes through all artificial wetland treatment links, it flows into the stabilization pond and continues to be purified by natural biological purification function. When the water body reaches a certain storage volume, the water body flows out from the outlet of the stabilization pond to obtain the final purified water body.

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