Controllable bioretention system

Abstract

The utility model relates to a controllable bioretention system. The utility model is suitable for the technical field of rainwater purification. According to the technical scheme, a water collecting tank is used for collecting rainwater; the water inlet end of the water distribution assembly is connected to the output end of the water collection tank, and the water distribution assembly is provided with a plurality of water outlet ends; the purification assembly is internally provided with a plurality of filtering functional areas, the filtering functional areas are correspondingly communicated with the water outlet ends respectively, and the filtering functional areas at least can conduct coarse filtering, fine filtering and drainage on the rainwater in sequence in the rainwater flowing direction; the water outlet tank is connected to the output end of the purification assembly and used for storing clean water obtained by purifying the rainwater through the purification assembly; the detection assembly is arranged in the water collecting tank and used for obtaining turbidity information and first water quality information of rainwater in the water collecting tank; and the control assembly is in communication connection with the water distribution assembly and the detection assembly, and the control assembly can send the rainwater in the water collection tank into the purification assembly through the corresponding water outlet end based on the water quality interval where the rainwater is located so as to adjust the filtering function area where the rainwater needs to flow through.

Description

TECHNICAL FIELD

[0001] The utility model relates to rainwater purification technical field especially a kind of adjustable biological retention system. BACKGROUND

[0002] With the acceleration of global climate change and urbanization, urban water bodies are facing higher water quality assessment requirements, but extreme weather events such as heavy rain and floods occur frequently, and urban stormwater management problems are increasingly prominent. Traditional urban stormwater drainage systems usually use simple collection and drainage methods to directly introduce rainwater into sewers or rivers without filtration and purification treatment. Due to the continuous expansion of impervious areas on urban surfaces, rainwater cannot quickly infiltrate the ground, resulting in a significant increase in stormwater runoff. This untreated stormwater runoff often carries a large amount of pollutants into water bodies, so stormwater runoff pollution becomes the main source of urban water pollution, which negatively affects the water environment, causing problems such as water eutrophication and heavy metal pollution, endangering the ecological environment and possibly threatening human health.

[0003] Traditional rainwater purification systems, such as storage tanks and wetlands, can slow down runoff, regulate water volume, and filter to some extent, but their treatment efficiency is low and their purification function is relatively single, and they cannot flexibly adjust the treatment process according to different rainwater quality. Urban stormwater carries a variety of pollutants, including suspended solids, heavy metals, organic pollutants, and nitrogen and phosphorus compounds, and a single treatment method cannot effectively remove these complex pollutants. Therefore, how to develop a rainwater treatment system that can quickly purify and flexibly adjust to improve the removal of stormwater pollutants and meet complex and changing water quality conditions and treatment needs is an important problem worth exploring. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a controllable biological retention system to address the above problems.

[0005] The technical solution adopted by the utility model is a controllable biological retention system, which includes:

[0006] A water collection tank for storing rainwater;

[0007] A water distribution assembly with multiple water outlets connected to the output end of the water collection tank;

[0008] A purification assembly with multiple filtration functional areas, multiple filtration functional areas and multiple water outlets are respectively connected in communication, and multiple filtration functional areas can at least sequentially perform coarse filtration, fine filtration, and drainage on rainwater along the direction of rainwater flow.

[0009] The water outlet tank is connected to the output end of the purification assembly and is used for storing clean water obtained by purifying rainwater through the purification assembly.

[0010] The detection assembly is arranged in the water collecting tank and is used for obtaining the turbidity information and the first water quality information of the rainwater in the water collecting tank.

[0011] The control assembly is in communication connection with the water distribution assembly and the detection assembly. The control assembly is internally preset with a turbidity information threshold and a plurality of water quality information thresholds. The control assembly can compare the turbidity information and the first water quality information with the internal thresholds respectively to obtain a water quality interval of the rainwater. Based on the water quality interval of the rainwater, the rainwater in the water collecting tank is sent into the purification assembly through the corresponding water outlet end to adjust the filtering function area through which the rainwater needs to flow.

[0012] Through the above technical means, the turbidity information and the first water quality information in the water collecting tank are detected by the detection assembly. The turbidity information and the first water quality information are compared with the internally preset plurality of thresholds to obtain the water quality interval of the rainwater in the water collecting tank. According to the different water quality intervals of the rainwater, the rainwater is sent into the corresponding filtering function area through the water distribution assembly, so as to flexibly adjust the filtering process of the rainwater in combination with the turbidity and water quality of the rainwater, improve the efficiency of rainwater purification, and improve the adjustable and controllable ability of the system.

[0013] In some embodiments, the purification assembly includes a plurality of retention cylinders and a mounting assembly. Each retention cylinder is internally provided with a corresponding filtering function area. The plurality of retention cylinders can be spliced according to the filtering process of the filtering function area. The assembled retention cylinder is mounted on the top of the water outlet tank through the mounting assembly. The filtering function areas in the assembled retention cylinder include a first function area, a second function area, a third function area, and a fourth function area in sequence along the flow direction of the rainwater. The first function area is used for removing large particle impurities in the rainwater to achieve preliminary filtration. The second function area is used for removing dissolved organic matter and heavy metal pollutants in the rainwater. The third function area is used for enhancing the water purification effect. The fourth function area is used for discharging the purified water into the water outlet tank and maintaining the stability of the upper function area structure.

[0014] In some embodiments, the filler of the first function area is soil, the upper layer of the soil is covered with vegetation, the filler of the second function area is biochar, soil, and river sand, the filler of the third function area is vermiculite, and the filler of the fourth function area is gravel.

[0015] In some embodiments, the retention cylinder is internally provided with a fan-shaped framework for distributing the filler. The bottom of the fan-shaped framework is detachably mounted with a circular support mesh. The fan-shaped framework, the support mesh, and the internal filler cooperate to form the filtering function area. The retention cylinders are connected through detachable waterproof belts.

[0016] In some embodiments, the installation assembly comprises a support column and connecting shafts, the top of the water outlet tank is provided with the support column, a plurality of connecting shafts are rotationally connected to the support column in a spaced arrangement, and the ends of the plurality of connecting shafts away from the support column are correspondingly connected to the retention cylinders.

[0017] In some embodiments, the water distribution assembly comprises a water inlet main pipe, a first water outlet valve, water inlet branch pipes, a first water inlet valve, a second water inlet valve and a third water inlet valve, the first water outlet valve, the first water inlet valve, the second water inlet valve and the third water inlet valve are connected to the control assembly, the first water outlet hole of the water collecting tank is connected to three water inlet branch pipes through the water inlet main pipe, the first water inlet branch pipe is connected to the first functional area, the first water inlet valve is installed on the first water inlet branch pipe, the second water inlet branch pipe is connected to the second functional area, the second water inlet valve is installed on the second water inlet branch pipe, the third water inlet branch pipe is connected to the third functional area, the third water inlet valve is installed on the third water inlet branch pipe, and the first water outlet valve is installed on the pipe section between the water inlet main pipe and the water inlet branch pipes.

[0018] In some embodiments, a water level monitoring probe is installed on the inner wall of the shaped retention cylinder, the water level monitoring probe is located above the first functional area, the water level monitoring probe is in communication connection with the control assembly, when the water level in the retention cylinder is higher than the water level monitoring probe, the water level monitoring probe sends water level information to the control assembly, and the control assembly controls the water distribution assembly to stop water supply to the shaped retention cylinder.

[0019] In some embodiments, the detection assembly comprises a first water quality detection probe and a turbidity detection probe, and the first water quality detection probe and the turbidity detection probe are installed on the inner wall of the water collecting tank.

[0020] In some embodiments, the biological retention system further comprises a water supply assembly and a second water quality detection probe, the second water quality detection probe is installed in the water outlet tank, the second water quality detection probe is in communication connection with the control assembly, the second water quality detection probe can obtain second water quality information of the water body in the water outlet tank, and the water collecting tank and the water outlet tank are connected through the water supply assembly, if the second water quality information does not meet the water quality information threshold value preset in the control assembly, the control assembly controls the water supply assembly to pump the water in the water outlet tank into the water collecting tank.

[0021] In some embodiments, the water supply assembly comprises a water conveying pipe, a circulating water pump and a check valve, the first water conveying hole of the water collecting tank and the second water conveying hole of the water outlet tank are connected in communication through the water conveying pipe, the circulating water pump is installed on the water conveying pipe, and the check valves are installed on the pipe sections at both ends of the circulating water pump on the water conveying pipe.

[0022] The biological retention system has the following beneficial effects:

[0023] 1. The turbidity information and water quality information of rainwater are obtained by the detection assembly, the water quality of rainwater and the corresponding water quality interval are obtained according to the turbidity information and water quality information, the rainwater is sent to the corresponding filtering function area through the outlet end of the water distribution assembly based on the water quality interval of the rainwater, and the filtering function area required by the rainwater is flexibly adjusted according to the water quality of the rainwater, so that the flexibility and controllability of the system in processing different water qualities are enhanced, the rainwater is purified in a short time, the rainwater purification rate is improved, and the rainwater purification cost is effectively reduced.

[0024] 2. In the rainwater storage and purification process, the synergistic purification mode of plants, soil, biochar, river sand and vermiculite is used to further optimize the permeation effect, purification rate and pollutant removal efficiency. The fillers in the first functional area are soil, which can preliminarily filter rainwater with high turbidity and containing many large-particle impurities. The fillers in the second functional area are biochar, soil and river sand, which can efficiently remove SS, COD, NH4 + -N, TN, TP and other pollutants in rainwater. The fillers in the third functional area are vermiculite, which can enhance the water purification effect. The fillers in the fourth functional area are gravel, which can ensure drainage and prevent the fillers in the upper functional area from sinking.

[0025] 3. In the purification assembly, a plurality of retention cylinders are assembled, and each retention cylinder is provided with a filtering function area. The fan-shaped distribution framework arranged in the retention cylinder is beneficial to the average distribution of the fillers. The support mesh at the bottom of the fan-shaped distribution framework can effectively prevent the fillers from sinking to the next retention cylinder. The retention cylinders are connected by waterproof belts, which can ensure the smooth flow of the internal water body without leakage and enhance the stability of the connection between the functional areas in the formed retention cylinder during the purification process. Meanwhile, the retention cylinder, the fan-shaped distribution framework, the support mesh and the waterproof belt are detachably connected. The overall structure of the purification assembly is convenient to disassemble and assemble. The upper three functional areas are respectively connected with connecting shafts, and the connecting shafts are rotatably connected with the support columns. This structure is convenient to disassemble and assemble and observe the state of the fillers, and can flexibly operate the replacement of the fillers. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 is a structural schematic diagram of the application.

[0027] Fig. 2 is a structural schematic diagram of the fan-shaped framework in the application.

[0028] BRIEF DESCRIPTION OF DRAWINGS:

[0029] 1, water collecting tank; 2-1, first water quality detection probe; 2-2, second water quality detection probe; 2-3, turbidity detection probe; 2-4, water level monitoring probe; 3, control assembly; 4, fan-shaped framework; 5-1, first water outlet valve; 5-2, second water outlet valve; 6-1, first water inlet valve; 6-2, second water inlet valve; 6-3, third water inlet valve; 6-4, check valve; 7, supporting screen; 8, supporting column; 9, connecting shaft; 10, waterproof belt; 11, circulating water pump; 12, retention cylinder; 13, water outlet tank; 14, water inlet main pipe; 15-1, first water outlet hole; 15-2, first water conveying hole; 15-3, water inlet hole; 15-4, second water conveying hole; 15-5, second water outlet hole; 16, water conveying and distributing pipe; 17, water inlet branch pipe.

[0030] This specification includes reference to“one embodiment” or“an embodiment.” Occurrences of the phrases“in one embodiment” or“in an embodiment” do not necessarily refer to the same embodiment. Particular features, structures, or characteristics can be combined in any suitable way in one or more embodiments of the disclosure.

[0031] “includes,” the term is open-ended. As used in the appended claims, this term does not exclude additional structures or steps. Thus, any structure or step not recited in the claims can be included in the claimed technology.

[0032] “first,”“second,” and the like. As used herein, these terms are merely labels applied to the various quantities or quantities, and are not intended to signify any type of ordering or ranking (e.g., spatial, temporal, logical, etc.).

[0033] “based on,” as used herein, this term is used to describe one or more factors that affect a determination. This term does not foreclose additional factors that can affect a determination. That is, a determination can be solely based on those factors or based, at least in part, on those factors. Consider the phrase“determine A based on B.” While in this case, B is a factor that affects the determination of A, such a phrase does not foreclose the determination of A from also being based on C. In other instances, a determination can be made based solely on B. DETAILED DESCRIPTION

[0034] In order to make the technical personnel in the technical field better understand the present application, the technical scheme of the present application will be further illustrated below in combination with specific embodiments.

[0035] In combination with Figs. 1-2As shown, the present embodiment is a controllable biological retention system, which comprises a water collecting tank 1, a water distribution assembly, a purification assembly, a water outlet tank 13, a detection assembly and a control assembly 3. The water collecting tank 1 is used for collecting rainwater. The output end of the water collecting tank 1 is connected with the water distribution assembly, and the water distribution assembly is connected with the purification assembly for purifying the rainwater in the water collecting tank 1. The output end of the purification assembly is connected with the water outlet tank 13 for storing the clean water obtained by purifying the rainwater in the purification assembly. The water inlet end of the water distribution assembly is in communication with the output end of the water collecting tank 1. The water distribution assembly has a plurality of water outlet ends, which are in communication with a plurality of filtering function areas provided in the purification assembly. The plurality of filtering function areas in the purification assembly can at least sequentially perform coarse filtration, fine filtration and drainage on the rainwater along the flow direction of the rainwater.

[0036] The water collecting tank 1 is provided with the detection assembly for obtaining the turbidity information and the first water quality information of the rainwater in the water collecting tank 1. The control assembly 3 is installed on the outer wall of the water collecting tank 1. The water distribution assembly and the detection assembly are in communication connection with the control assembly 3. The control assembly 3 is pre-provided with a turbidity information threshold value and a plurality of water quality information threshold values. The control assembly 3 can compare the turbidity information and the first water quality information with the internal threshold values respectively to obtain the water quality interval of the rainwater. Based on the water quality interval of the rainwater, the rainwater in the water collecting tank 1 is sent into the filtering function area of the purification assembly through the corresponding water outlet end, so as to adjust the filtering function area required by the rainwater to flow through.

[0037] In some embodiments, the purification assembly comprises a plurality of retention cylinders 12 and a mounting assembly. Each retention cylinder 12 is provided with a corresponding cylindrical filtering function area. The plurality of retention cylinders 12 can be spliced according to the filtering process of the filtering function area. The plurality of retention cylinders 12 are spliced to form a shaped retention cylinder. The completed shaped retention cylinder is mounted on the top of the water outlet tank 13 through the mounting assembly. In the present embodiment, the shaped retention cylinder is mainly composed of four retention cylinders 12. The filtering function areas in the shaped retention cylinder sequentially include a first function area, a second function area, a third function area and a fourth function area along the flow direction of the rainwater. The first function area is used for removing large particle impurities in the rainwater to achieve preliminary filtration. The second function area is used for removing dissolved organic matter and heavy metal pollutants in the rainwater. The third function area is used for enhancing the water purification effect. The retention cylinder 12 provided with the fourth function area is in communication with the water outlet tank 13. The fourth function area is used for discharging the purified water into the water outlet tank 13 and maintaining the stability of the upper function area structure.

[0038] Further, the retention cylinder 12 is provided with a fan-shaped framework 4 for distributing fillers. The bottom of the fan-shaped framework 4 is detachably mounted with a circular support mesh 7. The aperture size of the support mesh 7 is less than 0.01 cm. The fan-shaped framework 4, the support mesh 7 and the internal fillers cooperate to form the filtering function area. The retention cylinders 12 are connected through the detachable waterproof belt 10, which facilitates the replacement of the fillers in each function area and ensures the smooth flow of the internal water flow.

[0039] The fan-shaped framework 4 arranged in each retention cylinder 12 is beneficial to the average distribution of the filler, the support screen 7 arranged at the bottom of each retention cylinder 12 can effectively prevent the filler from collapsing into the next retention cylinder 12, and each retention cylinder 12 is connected through the waterproof belt 10, which enhances the stability of the connection of each functional area in the purification process, so as to ensure that the water flow between the internal functional areas is smooth and does not leak out.

[0040] Further, the filler of the first functional area is mainly composed of soil, and the upper layer of the soil is covered with vegetation; the filler of the second functional area is mainly composed of biochar, soil with a particle size of 0.45 cm, and river sand with a particle size of 0.01 cm to 0.03 cm; the filler of the third functional area is mainly composed of vermiculite with a particle size of 0.05 cm to 0.2 cm; and the filler of the fourth functional area is mainly composed of gravel to form a drainage layer.

[0041] Further, the water level monitoring probe 2-4 is installed on the inner wall of the shaped retention cylinder, the water level monitoring probe 2-4 is located at the top of the inner wall of the retention cylinder 12 provided with the first functional area, the water level monitoring probe 2-4 is in communication connection with the control assembly 3, when the water level in the shaped retention cylinder exceeds the water level monitoring probe 2-4, the water level monitoring probe 2-4 will send water level information to the control assembly 3, if the control assembly 3 receives the water level information sent by the water level monitoring probe 2-4, the control water distribution assembly will stop sending water into the shaped retention cylinder.

[0042] Further, the installation assembly includes support columns 8 and connecting shafts 9, the top of the water outlet tank 13 is fixedly installed with the support columns 8, the support columns 8 are rotatably connected with the plurality of spaced connecting shafts 9, and the ends of the plurality of connecting shafts 9 away from the support columns 8 are correspondingly connected with the retention cylinders 12. Specifically, the outer walls of the retention cylinders 12 provided with the first functional area, the second functional area and the third functional area are connected with the support columns 8 through the connecting shafts 9.

[0043] Each part of the retention cylinder 12 is fixed through the cooperation of the connecting shaft 9 and the support column 8, since the connecting shaft 9 can drive the corresponding retention cylinder 12 to rotate around the axis of the support column 8, it is convenient to load and unload the filler in the retention cylinder 12 and observe the state of the filler at different times, and the adjustability of each functional area is enhanced.

[0044] Further, the water distribution assembly includes the water inlet main pipe 14, the first water outlet valve 5-1, the water inlet branch pipe 17, the first water inlet valve 6-1, the second water inlet valve 6-2 and the third water inlet valve 6-3, the first water outlet valve 5-1, the first water inlet valve 6-1, the second water inlet valve 6-2 and the third water inlet valve 6-3 are connected with the control assembly 3, and the opening and closing of the first water outlet valve 5-1, the first water inlet valve 6-1, the second water inlet valve 6-2 and the third water inlet valve 6-3 are controlled by the control assembly 3. The side wall of the water collecting tank 1 is provided with the first water outlet hole 15-1, the water collecting tank 1 is connected with three water inlet branch pipes 17 through the first water outlet hole 15-1 and the water inlet main pipe 14, and the first water outlet valve 5-1 is installed on the pipe section between the water inlet main pipe 14 and the water inlet branch pipe 17. The side wall of the retention cylinder 12 where the first functional area, the second functional area and the third functional area are located is provided with the water inlet hole 15-3, the first water inlet branch pipe 17 communicates with the first functional area through the water inlet hole 15-3, the first water inlet valve 6-1 is installed on the first water inlet branch pipe 17, the second water inlet branch pipe 17 communicates with the second functional area through the water inlet hole 15-3, the second water inlet valve 6-2 is installed on the second water inlet branch pipe 17, and the third water inlet branch pipe 17 communicates with the third functional area through the water inlet hole 15-3. Specifically, the water inlet main pipe 14 and the water inlet branch pipe 17 in the embodiment are connected by flexible hoses to ensure the sealing performance of the pipes.

[0045] In some embodiments, the detection assembly includes the first water quality detection probe 2-1 and the turbidity detection probe 2-3, the first water quality detection probe 2-1 and the turbidity detection probe 2-3 are installed on the inner wall of the water collecting tank 1, the first water quality detection probe 2-1 can detect the first water quality information of the rainwater in the water collecting tank 1, and the turbidity detection probe 2-3 can detect the turbidity information of the rainwater in the water collecting tank 1.

[0046] In some embodiments, the bioretention system further includes a water delivery assembly and a second water quality detection probe 2-2, the second water quality detection probe 2-2 is installed in the water outlet tank 13, the second water quality detection probe 2-2 is in communication connection with the control assembly 3, the second water quality detection probe 2-2 can obtain the second water quality information of the water body in the water outlet tank 13, and the water collecting tank 1 and the water outlet tank 13 are connected with the water delivery assembly. If the second water quality information does not meet the water quality information threshold value preset in the control assembly 3, the control assembly 3 controls the water delivery assembly to pump the water in the water outlet tank 13 to the water collecting tank 1.

[0047] Further, the water delivery assembly includes the water delivery pipe 16, the circulating water pump 11 and the check valve 6-4, the first water delivery hole 15-2 of the water collecting tank 1 and the second water delivery hole 15-4 of the water outlet tank 13 are connected through the water delivery pipe 16, the circulating water pump 11 is installed on the water delivery pipe 16, and the check valve 6-4 is installed on the pipe sections at both ends of the circulating water pump 11.

[0048] Further, the side wall of the water outlet tank 13 is also provided with a second water outlet hole 15-5, and a water outlet pipe is connected to the second water outlet hole 15-5, and a second water outlet valve 5-2 is installed on the water outlet pipe.

[0049] In some embodiments, the turbidity threshold in the control assembly 3 in this embodiment is 1 NTU, and the multi-level water quality information threshold adopts the relevant standards of surface water in the Environmental Quality Standards for Surface Water GB3838-2002.

[0050] Specifically, the bioretention system includes a storage stage, a purification stage, and a water outlet stage.

[0051] Storage stage:

[0052] Rainwater enters the water collecting tank 1, and the first water quality detection probe 2-1 and the turbidity detection probe 2-3 on the inner wall of the water collecting tank 1 start detection, and the obtained first water quality information and turbidity information are fed back to the control assembly 3, and then the control assembly 3 controls the valves on the water inlet main pipe 14 and the water inlet branch pipe 17 based on the first water quality information and the turbidity information.

[0053] Purification stage:

[0054] If the turbidity information obtained by the turbidity detection probe 2-3 is ≥1 NTU, the control assembly 3 controls the first water outlet valve 5-1 on the water inlet main pipe 14 to open, the first water inlet valve 6-1 corresponding to the first functional area on the water inlet branch pipe 17 to open, the second water inlet valve 6-2 corresponding to the second functional area on the water inlet branch pipe 17 to close, and the third water inlet valve 6-3 corresponding to the third functional area on the water inlet branch pipe 17 to close, so that the rainwater enters the shaped retention cylinder and then flows through the first functional area, the second functional area, the third functional area, and the fourth functional area in turn.

[0055] The rainwater first penetrates through the soil layer of the first functional area to preliminarily intercept large-particle impurities, and then enters the second functional area for purification, wherein the second functional area is a purification layer composed of biochar, soil, and river sand, which can efficiently remove SS, COD, NH4 + -N, TN, TP, and other pollutants. After passing through the vermiculite layer in the third functional area, the purification effect is enhanced, and finally the rainwater enters the gravel drainage layer in the fourth functional area, and after purification is completed, it is further discharged into the water outlet tank 13.

[0056] If the turbidity information obtained by the turbidity detection probe 2-3 is less than or equal to 1 NTU, and the first water quality information obtained by the first water quality detection probe 2-1 does not reach the surface water IV standard in the Environmental Quality Standards for Surface Water GB3838-2002, the control component 3 controls the first water outlet valve 5-1 on the water inlet main pipe 14 to open, the second water inlet valve 6-2 corresponding to the second water inlet branch pipe 17 in the second functional area to open, and the first water inlet valve 6-1 corresponding to the first water inlet branch pipe 17 in the first functional area and the third water inlet valve 6-3 corresponding to the third water inlet branch pipe 17 in the third functional area to close. Rainwater enters the shaped retention cylinder and can flow through the second functional area, the third functional area and the fourth functional area in turn.

[0057] If the turbidity information obtained by the turbidity detection probe 2-3 is less than or equal to 1 NTU, and the first water quality information obtained by the first water quality detection probe 2-1 reaches the surface water IV standard in the Environmental Quality Standards for Surface Water GB3838-2002, the control component 3 controls the first water outlet valve 5-1 on the water inlet main pipe 14 to open, the third water inlet valve 6-3 corresponding to the third water inlet branch pipe 17 in the third functional area to open, and the first water inlet valve 6-1 corresponding to the first water inlet branch pipe 17 in the first functional area and the second water inlet valve 6-2 corresponding to the second water inlet branch pipe 17 in the second functional area to close. Rainwater enters the shaped retention cylinder and can flow through the third functional area and the fourth functional area in turn.

[0058] When the rainwater is in the shaped retention cylinder and the water level in the first functional area exceeds the inner wall top water level monitoring probe 2-4, the water level monitoring probe 2-4 feeds back the detection signal to the control component 3, and then the control component 3 closes the first water outlet valve 5-1 on the water inlet main pipe 14 of the water collecting tank 1. When the water level drops below the water level monitoring probe 2-4, the control component 3 controls the first water outlet valve 5-1 to open.

[0059] Water outlet stage:

[0060] After the rainwater is purified by the shaped retention cylinder, it directly enters the water outlet tank 13 from the fourth functional area.

[0061] The second water quality detection probe 2-2 at the bottom of the inner wall of the water outlet tank 13 detects the second water quality information. When the second water quality information reaches the surface water III standard in the Environmental Quality Standards for Surface Water GB3838-2002, the control component 3 controls the circulating water pump 11 and the front and rear check valves 6-4 to close, and controls the second water outlet valve 5-2 on the water outlet pipe of the water outlet tank 13 to open.

[0062] When the second water quality information does not reach the surface water III standard in the Environmental Quality Standards for Surface Water GB3838-2002, the control component 3 controls the circulating water pump 11 and the front and rear check valves 6-4 to open, and controls the second water outlet valve 5-2 on the water outlet pipe of the water outlet tank 13 to close, so that the water in the water outlet tank 13 is retransported to the water collecting tank 1 for secondary purification.

[0063] The implementation principle of the embodiment of the adjustable biological retention system is as follows:

[0064] By storing rainwater in the water collecting tank 1, the first water quality detection probe 2-1, the turbidity detection probe 2-3 and the water level monitoring probe 2-4 are used for joint monitoring, and the detection information is fed back to the control assembly 3, the control assembly 3 intelligently controls the opening and closing of the pipeline valve between the water collecting tank 1 and the retention cylinder 12 and the water outlet tank 13 and the water collecting tank 1 based on the detection information, so as to flexibly control the use of the functional area according to different water quality conditions.

[0065] The first functional area in the shaped retention cylinder uses physical means to intercept large particle substances and initial pollutants, the second functional area combines chemical adsorption and biological treatment to remove soluble organic matter and complex pollutants such as heavy metals, the third functional area focuses on removing specific types of pollutants such as ammonium ions through ion exchange mechanism and providing trace elements required by plants, and the fourth functional area ensures that the treated water can be smoothly discharged, while maintaining the structural integrity and long-term stability of the whole system.

[0066] The shaped retention cylinder in the application is assembled by a plurality of retention cylinders 12 provided with independent functional areas, each functional area can be filled with different medium materials according to needs to achieve a specific water treatment purpose. Through the standardized disassembly and assembly design, the retention cylinder 12 can be quickly assembled on the construction site, reducing the construction time and cost. At the same time, by changing the filler combination or order in each functional area, different types of pollutants can be optimized for treatment, thereby improving the applicability and processing efficiency of the system.

[0067] The above are preferred embodiments of the utility model, which do not limit the protection scope of the utility model, therefore: all equivalent changes made according to the structure, shape, principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A regulated bioretention system, characterized in that, The utility model relates to a rainwater collection system, comprising: a water collection tank (1) for collecting rainwater; a water distribution assembly connected to the output end of the water collection tank (1), the water distribution assembly having a plurality of water outlet ends; a purification assembly having a plurality of filtration functional zones, the plurality of filtration functional zones being respectively connected to the plurality of water outlet ends, and the plurality of filtration functional zones being capable of sequentially performing coarse filtration, fine filtration and water drainage on the rainwater along the direction of flow of the rainwater; a water outlet tank (13) connected to the output end of the purification assembly for storing clean water obtained by purifying the rainwater in the purification assembly; a detection assembly arranged in the water collection tank (1) for obtaining the turbidity information and the first water quality information of the rainwater in the water collection tank (1); a control assembly (3) in communication with the water distribution assembly and the detection assembly, the control assembly (3) being preconfigured with a turbidity information threshold value and a plurality of water quality information threshold values, the control assembly (3) being capable of comparing the turbidity information and the first water quality information with the internal threshold values respectively to obtain the water quality range of the rainwater, and based on the water quality range of the rainwater, the rainwater in the water collection tank (1) is sent into the purification assembly through the corresponding water outlet end to adjust the filtration functional zone through which the rainwater needs to flow.

2. The regulated bio-retention system of claim 1, wherein: The purification assembly comprises a plurality of retention cylinders (12) and a mounting assembly, each retention cylinder (12) being provided with a corresponding filtration functional zone, and the plurality of retention cylinders (12) being capable of being spliced according to the filtration procedures of the filtration functional zones, the assembled retention cylinders being mounted on the top of the water outlet tank (13) through the mounting assembly, the filtration functional zones in the assembled retention cylinders sequentially comprising a first functional zone, a second functional zone, a third functional zone and a fourth functional zone along the direction of flow of the rainwater, the first functional zone being used for removing large-particle impurities in the rainwater to achieve preliminary filtration, the second functional zone being used for removing dissolved organic matter and heavy metal pollutants in the rainwater, the third functional zone being used for enhancing the water purification effect, and the fourth functional zone being used for discharging the purified water into the water outlet tank (13) and maintaining the stability of the upper functional zone structure.

3. The regulated bio-retention system of claim 2, wherein: The filler of the first functional zone is soil, the upper layer of the soil is covered with vegetation, the filler of the second functional zone is biochar, soil and river sand, the filler of the third functional zone is vermiculite, and the filler of the fourth functional zone is gravel.

4. The regulated bio-retention system of claim 2, wherein: The retention cylinder (12) is provided with a fan-shaped framework (4) for distributing the filler, the bottom of the fan-shaped framework (4) is detachably provided with a circular support mesh (7), the fan-shaped framework (4), the support mesh (7) and the internal filler are matched to form the filtration functional zone, and the retention cylinders (12) are connected through detachable waterproof belts (10).

5. The regulated bio-retention system of claim 2, wherein: The mounting assembly comprises a support column (8) and a connecting shaft (9), the top of the water outlet tank (13) is provided with the support column (8), a plurality of spaced connecting shafts (9) are rotatably connected to the support column (8), and the ends of the plurality of connecting shafts (9) away from the support column (8) are respectively connected to the retention cylinders (12).

6. The regulated bio-retention system of claim 2, wherein: The water distribution assembly comprises a water inlet main pipe (14), a first water outlet valve (5-1), water inlet branch pipes (17), a first water inlet valve (6-1), a second water inlet valve (6-2) and a third water inlet valve (6-3), the first water outlet valve (5-1), the first water inlet valve (6-1), the second water inlet valve (6-2) and the third water inlet valve (6-3) are connected with the control assembly (3), the first water outlet hole (15-1) of the water collecting tank (1) is connected with three water inlet branch pipes (17) through the water inlet main pipe (14), the first water inlet branch pipe (17) is communicated with the first functional area, the first water inlet valve (6-1) is installed on the first water inlet branch pipe (17), the second water inlet branch pipe (17) is communicated with the second functional area, the second water inlet valve (6-2) is installed on the second water inlet branch pipe (17), the third water inlet branch pipe (17) is communicated with the third functional area, the third water inlet valve (6-3) is installed on the third water inlet branch pipe (17), and the first water outlet valve (5-1) is installed on the pipe section between the water inlet main pipe (14) and the water inlet branch pipe (17).

7. The regulated bio-retention system of claim 2, wherein: The inner wall of the shaped retention cylinder is provided with a water level monitoring probe (2-4), the water level monitoring probe (2-4) is located above the first functional area, the water level monitoring probe (2-4) is in communication connection with the control assembly (3), when the water level in the retention cylinder is higher than the water level monitoring probe (2-4), the water level monitoring probe (2-4) sends water level information to the control assembly (3), and the control assembly (3) controls the water distribution assembly to stop water supply to the shaped retention cylinder.

8. The regulated bio-retention system of claim 1, wherein: The detection assembly comprises a first water quality detection probe (2-1) and a turbidity detection probe (2-3), and the first water quality detection probe (2-1) and the turbidity detection probe (2-3) are installed on the inner wall of the water collecting tank (1).

9. The regulated bio-retention system of claim 1, wherein: The bio-retention system further comprises a water supply assembly and a second water quality detection probe (2-2), the second water quality detection probe (2-2) is installed in the water outlet tank (13), the second water quality detection probe (2-2) is in communication connection with the control assembly (3), the second water quality detection probe (2-2) can obtain second water quality information of the water body in the water outlet tank (13), the water collecting tank (1) and the water outlet tank (13) are connected with the water supply assembly, if the second water quality information does not meet the water quality information threshold value preset in the control assembly (3), the control assembly (3) controls the water supply assembly to pump the water in the water outlet tank (13) to the water collecting tank (1).

10. The regulated bio-retention system of claim 9, wherein: The water supply assembly comprises a water supply pipe (16), a circulating water pump (11) and a check valve (6-4), the first water inlet hole (15-2) of the water collecting tank (1) and the second water inlet hole (15-4) of the water outlet tank (13) are communicated through the water supply pipe (16), the circulating water pump (11) is installed on the water supply pipe (16), and the check valve (6-4) is installed on the pipe sections at both ends of the circulating water pump (11).

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