Rainwater recycling device

Abstract

The utility model discloses a rainwater recycling device which comprises a rainwater collecting and distributing assembly, a rainwater driving assembly, a rainwater processing assembly, a clear water storage tank, a municipal water supplementing assembly, a recycling assembly and a rainwater recycling pipeline. The rainwater collecting and distributing assembly, the rainwater treatment assembly, the clear water storage tank and the recycling assembly are sequentially communicated through a rainwater recycling pipeline, and the rainwater driving assembly is arranged on the rainwater recycling pipeline between the rainwater collecting and distributing assembly and the rainwater treatment assembly; the rainwater treatment assembly comprises a mixing device and a dosing tank, the mixing device is communicated with the tops of the rainwater collecting and distributing assembly and the clear water storage tank through rainwater recycling pipelines, and the bottom of the dosing tank is communicated with the mixing device; the municipal water replenishing assembly is communicated with the top of the clear water storage tank and the top of the dosing tank through a water replenishing pipeline, and the municipal water replenishing assembly is communicated with a municipal water supply pipe network through a water replenishing pipeline. The rainwater recycling system can be used for efficiently and stably collecting, treating and recycling rainwater in an energy-saving manner.

Description

Technical Field

[0001] This utility model belongs to the field of rainwater harvesting and treatment technology, and specifically relates to a rainwater reuse device. Background Technology

[0002] Rainwater runsoff is rapid during rainfall, easily causing urban flooding. Rainwater runoff also carries pollutants, causing surface and water pollution. However, existing rainwater treatment technologies are not mature enough. The various processes in the entire rainwater treatment and reuse system are relatively dispersed, resulting in low rainwater collection and treatment efficiency, unstable treatment effects, and inconvenient daily management and maintenance.

[0003] Invention CN111691526A discloses a rainwater treatment and reuse system. The system includes a safety diversion well, a rainwater diverter well, an underground integrated purification unit, and a rainwater storage tank. A rainwater diverter is installed inside the rainwater diversion well. One end of the rainwater diverter well is connected to the rainwater collection pipe of the safety diversion well, and the other end receives a collection pipe. The collection pipe connects to a connecting pipe on the upper side of one side of the underground integrated purification unit, and a connecting pipe on the lower side of the other side of the underground integrated purification unit connects to the rainwater storage tank. A PP water storage module is installed in the middle of the rainwater storage tank. A sludge pump and a reuse pump are installed in the rainwater storage tank on both sides of the PP water storage module. Rainwater is collected and diverted through the safety diversion well, then flows into the rainwater diverter to intercept large suspended particles, and then enters the underground integrated purification unit for further treatment of the diverted and initially filtered rainwater. However, the system lacks a clear water tank, which means it lacks the necessary buffering and regulation capabilities when encountering emergencies such as heavy rain or continuous rainfall. Its rainwater absorption capacity is poor, which may lead to the rainwater treatment equipment operating under overload, reducing the utilization efficiency of rainwater resources and failing to fully realize the potential advantages of the rainwater collection, treatment and reuse system in alleviating urban flooding and replenishing water resources.

[0004] Utility model CN217780903U discloses a rainwater treatment and reuse device, comprising: a first filtration section, a sedimentation section, a second filtration section, a chemical dosing section, a clear water section, a rainwater collection pipe, and a rainwater reuse pipe. The lower end of the first filtration section extends into the sedimentation section and is connected to it. The sedimentation section and the second filtration section are connected via an overflow connection. The lower end of the second filtration section is connected to the lower end of the chemical dosing section via a water outlet. The upper end of the clear water section is connected to the upper end of the chemical dosing section via an overflow connection. The rainwater collection pipe is connected to the first filtration section, and the rainwater reuse pipe is connected to the clear water section. By applying this utility model, a rainwater treatment and reuse device integrating rainwater collection, interception, diversion, sedimentation, filtration, and disinfection functions is provided, and the rainwater meets the water quality standards for reuse through sedimentation, filtration, and disinfection. However, this utility model adopts an integrated cavity design, integrating multiple functional modules such as rainwater collection, treatment, and storage into one cavity. The internal structure is complex, with dense pipelines and components, making daily troubleshooting and maintenance inconvenient and unable to locate faults in a timely manner, affecting the efficiency and timeliness of maintenance. Moreover, the risk of cascading failures is high. For example, if the filter device is damaged or the water pump fails, it will quickly affect other modules, causing the entire system to malfunction. Furthermore, the integrated design has poor construction flexibility, making it difficult to make flexible adjustments according to specific site conditions and needs. It also has high space requirements and cannot be well adapted to rainwater collection and reuse scenarios. Utility Model Content

[0005] In view of the deficiencies in the existing technology, the present invention provides a rainwater recycling device that can efficiently, energy-savingly and stably collect, treat and reuse rainwater.

[0006] This utility model provides a rainwater reuse device, including a rainwater collection and diversion component, a rainwater driving component, a rainwater treatment component, a clean water storage tank, a municipal water supply component, a reuse component, and a rainwater reuse pipeline;

[0007] The rainwater harvesting and diversion assembly, rainwater treatment assembly, clean water storage tank and reuse assembly are connected in sequence through a rainwater reuse pipeline, and the rainwater drive assembly is located on the rainwater reuse pipeline between the rainwater harvesting and diversion assembly and the rainwater treatment assembly.

[0008] The rainwater treatment components include a mixing device and a dosing tank. The mixing device is connected to the top of the rainwater collection and diversion component and the clean water storage tank via rainwater reuse pipelines. The bottom of the dosing tank is connected to the mixing device.

[0009] The municipal water supply component is connected to the top of the clean water storage tank and the top of the chemical dosing tank through a water supply pipeline, and is also connected to the municipal water supply network through a water supply pipeline.

[0010] Furthermore, the rainwater harvesting and diversion assembly includes a rainwater harvesting and diversion device and a rainwater collection tank. The first outlet of the rainwater harvesting and diversion device is connected to the top of the rainwater collection tank through a rainwater reuse pipeline. The second outlet of the rainwater harvesting and diversion device is connected to the municipal rainwater pipe network through a diversion pipeline. The bottom of the rainwater collection tank is connected to a mixing device through a rainwater reuse pipeline.

[0011] Furthermore, the dosing tanks include a coagulant dosing tank and a disinfectant dosing tank. The bottom of the coagulant dosing tank is connected to the mixing equipment, and the bottom of the disinfectant dosing tank is connected to the rainwater reuse pipeline between the mixing equipment and the clean water storage tank. The tops of both the coagulant dosing tank and the disinfectant dosing tank are connected to the municipal water supply components through water supply pipelines.

[0012] Furthermore, the rainwater treatment components also include a multi-stage filtration system connected to the top of the mixing equipment and the clean water storage tank.

[0013] Furthermore, the multi-stage filtration equipment includes a quartz sand filter and an activated carbon filter connected through a rainwater reuse pipeline. The quartz sand filter is connected to a mixing device through the rainwater reuse pipeline, and the activated carbon filter is connected to a clean water storage tank through the rainwater reuse pipeline.

[0014] Furthermore, the clean water storage tank is connected to the quartz sand filter via a backwashing pipeline, which is equipped with a backwashing pump.

[0015] Furthermore, the diameter of the backwashing pipeline is larger than the diameter of the rainwater reuse pipeline.

[0016] Furthermore, the rainwater reuse device also includes a collection well, which is connected to the municipal sewage network through a sewage pipe. The rainwater collection and diversion component, dosing tank, multi-stage filtration equipment and clean water storage tank are respectively connected to the top of the collection well through sewage pipes.

[0017] Furthermore, the reuse components include a variable frequency pump set and a pressure tank. The variable frequency pump set is connected to the clean water storage tank and transports the rainwater in the clean water storage tank to the reuse location through the output pipeline. The pressure tank is located on the output pipeline.

[0018] Furthermore, the difference between the height of the outlet connecting the water supply pipeline to the top of the clean water storage tank and the maximum liquid level height of the clean water storage tank is greater than a times the diameter of the water supply pipeline, where a ≥ 2.5.

[0019] The rainwater recycling device provided by this utility model has at least the following beneficial effects:

[0020] (1) The rainwater collection and diversion component enables the collection and diversion of rainwater, providing a foundation for subsequent rainwater treatment and reuse. The rainwater drive component propels the rainwater into the rainwater treatment component for processing, and the treated rainwater is stored in a clean water storage tank. This provides buffering and regulation between rainwater treatment and reuse, improving rainwater absorption capacity. It also prevents the rainwater treatment component from overloading due to the need for timely processing. Furthermore, the municipal water supply component effectively controls the water level in the clean water storage tank, allowing the rainwater reuse device to be applied to different scenarios and avoiding weather-related limitations that prevent or hinder reuse. In short, this invention effectively improves water quality compliance rates and enhances rainwater purification and reuse efficiency through step-by-step, graded treatment.

[0021] (2) The decentralized setup of each treatment stage can effectively cope with the rainwater absorption capacity under extreme conditions such as continuous rainfall, while improving the reliability and stability of the entire device.

[0022] (3) The installation of municipal water replenishment components and water replenishment pipelines can collect rainwater during the rainy season, and after treatment and storage, it can be reused, which helps to achieve a virtuous cycle of water ecology. Water replenishment is carried out during the non-rainy season to ensure the continuity of reuse. Attached Figure Description

[0023] Figure 1 A schematic diagram of a rainwater recycling device provided by this utility model;

[0024] Figure 2 A partial structural schematic diagram of a rainwater recycling device provided in a certain embodiment of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of a rainwater recycling device provided in a certain embodiment of the present invention.

[0026] Explanation of reference numerals in the attached drawings: 1-Rainwater harvesting and diversion assembly, 11-Rainwater harvesting and diversion equipment, 12-Rainwater harvesting tank, 2-Rainwater drive assembly, 3-Rainwater treatment assembly, 31-Mixing equipment, 32-Coagulant dosing tank, 33-Disinfectant dosing tank, 34-Quartz sand filter, 35-Activated carbon filter, 4-Clean water storage tank, 5-Reuse assembly, 51-Variable frequency pump set, 52-Pressure tank, 6-Municipal water supply assembly, 7-Collection well, 8-Backwash pump. Detailed Implementation

[0027] To better understand the above technical solutions, a detailed description of the solutions will be provided below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] The terminology used in the embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. The singular forms “a,” “the,” and “the” used in the embodiments of this utility model and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0029] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0030] like Figure 1 and Figure 2 As shown, this utility model provides a rainwater reuse device, which may include a municipal water supply component 6, and rainwater collection and diversion component 1, rainwater driving component 2, rainwater treatment component 3, clean water storage tank 4, reuse component 5 and rainwater reuse pipeline connected in sequence.

[0031] The rainwater harvesting and diversion component 1, rainwater treatment component 3, clean water storage tank 4, and reuse component 5 are connected sequentially through a rainwater reuse pipeline. The rainwater drive component 2 is located on the rainwater reuse pipeline between the rainwater harvesting and diversion component 1 and the rainwater treatment component 3. The rainwater treatment component 3 includes a mixing device 31 and a dosing tank. The mixing device 31 is connected to the top of the rainwater harvesting and diversion component 1 and the clean water storage tank 4 through the rainwater reuse pipeline, and the bottom of the dosing tank is connected to the mixing device 31. The municipal water supply component 6 is connected to the top of the clean water storage tank 4 and the top of the dosing tank through a water supply pipeline, and the municipal water supply component 6 is connected to the municipal water supply network through a water supply pipeline.

[0032] In practical applications, the rainwater harvesting and diversion component 1 is used to collect and store rainwater from different roofs and sites, as well as to physically treat the stored rainwater. Further, the rainwater harvesting and diversion component 1 may include a connected rainwater harvesting and diversion device 11 and a rainwater collection tank 12. The first outlet of the rainwater harvesting and diversion device 11 is connected to the top of the rainwater collection tank 12 via a rainwater reuse pipeline. The second outlet of the rainwater harvesting and diversion device 11 is connected to the municipal rainwater network via a diversion pipeline. The bottom of the rainwater collection tank 12 is connected to a mixing device 31 via a rainwater reuse pipeline. The rainwater harvesting and diversion device 11 is used to collect rainwater and to divert, divert, and filter the rainwater. The rainwater collection tank 12 is used to settle and store the rainwater treated by the rainwater harvesting and diversion device 11.

[0033] Rainwater from different roofs and sites enters the rainwater collection and diversion equipment 11 through the rainwater pipe network. The rainwater collection and diversion equipment 11 can be installed on the ground or underground, and combines physical treatment (such as filter screens) to remove large particulate impurities, reducing the load on subsequent treatment. The amount of rainwater runoff to be diverted can be determined based on the concentration of pollutants such as CODcr, SS, and color. The initial diversion frequency and water quality are controlled based on the diversion index, which is energy-saving and environmentally friendly. Preferably, the rainwater collection and diversion equipment 11 can be equipped with multiple chambers and multiple channels to realize the functions of diversion, diversion, and filtration. It can also separate and filter rainwater from pollutants through cyclone sand removal and solid-liquid separation to improve the water quality of rainwater. Furthermore, the rainwater collection and diversion equipment 11 adopts a multi-chamber, multi-channel structure, which can integrate the functions of diversion, diversion, cyclone sand removal, and filtration into one unit. The rainwater harvesting and diversion device 11 can also be equipped with a built-in safety overflow port to prevent overload and ensure the drainage safety of the rainwater reuse device. The diversion function can be implemented by judging and removing runoff thickness of 3mm. Specifically, when the rainwater runoff reaches 3mm, it is automatically discarded and does not enter the subsequent storage or utilization stage. This can remove pollutants (such as leaves, dust, oil, microorganisms, etc.) carried by the initial rainwater, thereby improving the quality of the collected rainwater. In addition, sensors can be installed on the underlying surface of the rainwater harvesting and diversion device 11 to measure the concentration of pollutants in the collected rainwater to adjust the diversion flow rate of the initial runoff, control the frequency of diversion and the quality of the influent, such as increasing the diversion frequency and extending the initial diversion time when the pollutant concentration is high, ensuring the quality of the influent and improving the efficiency of the initial water purification.

[0034] After being treated by the rainwater collection and diversion device 11, rainwater enters the rainwater collection tank 12. The rainwater collection tank 12 also has a sedimentation function, with its inlet angled upwards or horizontally, adopting a submerged water intake. Additionally, an energy-dissipating and flow-dispersing trough can be installed at the inlet of the rainwater collection tank 12 to reduce the impact force of the water flow and prevent the stirring of bottom sediment. A sludge discharge device can be installed at the bottom of the rainwater collection tank 12 to discharge sludge and prevent excessive sedimentation. Correspondingly, an overflow pipe can be installed at a high position on the rainwater collection tank 12 to discharge rainwater exceeding the height limit to the outdoor municipal stormwater drainage network when rainfall is excessive, preventing rainwater overflow and impacting the area around the rainwater collection tank 12.

[0035] The rainwater harvesting and diversion component 1 performs preliminary treatment on the collected rainwater, which can remove larger particulate impurities from the rainwater, reducing the burden on the subsequent rainwater treatment component 3 for deep water purification, thereby extending the life of the filter media and achieving the effects of cost saving and reduced maintenance frequency.

[0036] The rainwater drive assembly 2 consists of one or more water pumps, which can be flexibly configured according to actual needs. For example, the rainwater drive assembly 2 may include multiple booster pumps installed in the rainwater collection tank 12. Multiple booster pumps operate independently, with one as a standby pump, and the remaining booster pumps are selected for operation according to actual needs. Alternatively, the booster pumps can be installed outside the rainwater collection tank 12 and directly connected to it via pipelines. The pipelines with the booster pumps are connected in parallel and converge at the outlet to form a single pipeline connecting to the rainwater treatment assembly 3.

[0037] The mixing device 31 can be a spiral mixer, vortex mixer, etc., which only needs to be able to mix the chemicals and rainwater. The specific selection is determined according to actual needs or application scenarios. Preferably, the mixing device 31 in this embodiment adopts a spiral mixer with a specification of DN50. The dosing tank can include a coagulant dosing tank 32 and a disinfectant dosing tank 33. The bottom of the coagulant dosing tank 32 is connected to the mixing device, and the bottom of the disinfectant dosing tank 33 is connected to the rainwater reuse pipeline between the mixing device 31 and the clean water storage tank 4. The tops of both the coagulant dosing tank 32 and the disinfectant dosing tank 33 are connected to the municipal water supply component 6 through water supply pipelines. Specifically, the mixing device 31 mixes the coagulant in the coagulant dosing tank 32 with the rainwater driven by the rainwater drive component 2. Through charge neutralization or adsorption bridging, suspended particles (silt, clay) and colloidal substances (algal secretions, organic debris) in the rainwater are agglomerated into larger flocs (lumps), facilitating subsequent sedimentation or filtration removal. Simultaneously, it reduces the "encapsulation" effect of suspended solids on subsequently added disinfectants, improving the contact efficiency between disinfectants and microorganisms, and enhancing the rainwater treatment effect of the rainwater reuse device. In practical applications, the initial flow rate of the dosing tank is set at 10L / h, and the flow rate is adjusted according to the coagulation effect until the optimal coagulation effect is achieved. The coagulant can be basic aluminum chloride, specifically prepared by mixing 25%–35% basic aluminum chloride with water at a mass ratio of (30–35)(1900–2100).

[0038] The capacities of the coagulant dosing tank 32 and the disinfectant dosing tank 33 in the rainwater reuse device can be selected and configured according to the actual rainwater treatment volume. For example, for areas with large and / or frequent rainfall, larger capacity coagulant dosing tanks 32 and 33 can be selected; conversely, smaller capacity coagulant dosing tanks 32 can be selected. This can effectively ensure rainwater treatment without the problem of low rainwater treatment efficiency and effect caused by frequent addition of chemical raw materials. At the same time, it can also avoid the problems of prolonged storage of chemicals in coagulant dosing tanks 32 and 33 with large solvents, which would affect the efficacy of the chemicals and occupy a large space. In this embodiment, the volume of both the coagulant dosing tank 32 and the disinfectant dosing tank 33 is at least 200L.

[0039] A multi-stage filtration system is also installed corresponding to the dosing tank, which can work in conjunction with the coagulant dosing tank 32 to settle or filter suspended particles and flocs in rainwater. Specifically, the multi-stage filtration system is located between the mixing equipment 31 and the clear water storage tank 4, and is connected to both the mixing equipment 31 and the clear water storage tank 4. The multi-stage filtration system may include a quartz sand filter 34 and an activated carbon filter 35 connected via a rainwater reuse pipeline. The quartz sand filter 34 is connected to the mixing equipment 31 via the rainwater reuse pipeline, and the activated carbon filter 35 is connected to the clear water storage tank 4 via the rainwater reuse pipeline. The quartz sand filter 34 can intercept large particulate impurities such as suspended solids, particulate matter, and flocs in the rainwater, thereby significantly reducing the turbidity of the rainwater and making it clearer. The activated carbon filter 35 can adsorb organic matter (such as pesticide residues and humic acid), residual chlorine, odors, pigments, and some heavy metal ions, thereby achieving the purpose of removing the "chlorine smell" or other odors from the rainwater. In addition, the quartz sand filter 34 and the activated carbon filter 35 can work synergistically. For example, the preliminary filtration of the quartz sand filter 34 reduces the load pressure on the activated carbon filter 35, avoids the problem of decreased adsorption efficiency due to particulate matter clogging, and makes the removal of pollutants more comprehensive.

[0040] In this embodiment, the overall process of rainwater treatment component 3 treating rainwater is as follows: Rainwater treated by rainwater collection and diversion component 1 is driven by rainwater drive component 2 and enters the pipe connected to rainwater treatment component 3; coagulant added by coagulant dosing tank 32 also enters the pipe connected to rainwater treatment component 3 and mixes with the rainwater; the rainwater mixed with coagulant enters the quartz sand filter 34 in rainwater treatment component 3, and the rainwater filtered by quartz sand filter 34 enters the activated carbon filter 35 for secondary filtration, and after mixing with disinfectant added by disinfectant dosing tank 33, it enters the clean water storage tank 4. Rainwater treatment component 3 performs dual filtration of rainwater through quartz sand filter 34 and activated carbon filter 35, and disinfection by disinfectant added by disinfectant dosing tank 33. The treated rainwater quality can meet the requirements of non-potable water scenarios such as greening irrigation and road washing.

[0041] In addition, such as Figure 3As shown, to ensure the filtration capacity and service life of the quartz sand filter 34 and the activated carbon filter 35, a backwashing pipeline connects the clean water storage tank 4 to both filters. The diameter of the backwashing pipeline connected to the quartz sand filter 34 is larger than that connected to the activated carbon filter 35, and the diameter of the backwashing pipeline connected to the quartz sand filter 34 is larger than that of the rainwater reuse pipeline. A backwashing pump 8 is installed on the backwashing pipeline. When impurities accumulate in the filter media layer of the quartz sand filter 34, the backwashing pump 8 provides water flow power to backwash the filter media layer, restoring the filtration performance of the quartz sand filter 34, improving the filtration effect and water quality, while extending the service life of the filter media, reducing the frequency of filter media replacement, and lowering operating costs. The same effect can be achieved for the activated carbon filter 35, and it can also expand the rainwater reuse scenarios and improve resource utilization. The flow rate of the backwashing pump 8 can be set to 14–20 T / h, preferably 16 T / h.

[0042] After rainwater is treated by the rainwater treatment component 3, the treated rainwater can be stored for subsequent application in different water use scenarios. Specifically, the clean water storage tank 4 is a clean water container for holding the treated rainwater. At least one ultraviolet sterilizer can be installed on the top, bottom, or around the clean water storage tank 4 to combine with a disinfectant to complete disinfection, reduce operating costs, and further improve water quality. The capacity of the clean water storage tank 4 can be selected according to the rainfall conditions (rainfall amount, rainfall frequency) and / or water use conditions (water consumption, water use frequency) of the actual application area; at the same time, an appropriate overflow level needs to be set. In practical application scenarios, the design water level of the clean water storage tank 4 can be 3-3.5m, the overflow level can be 2.85-3.35m, and the volume can be 10-20m³. 3 Preferably, the design water level of the clean water storage tank 4 is 3.3m, the overflow water level is 3.15m, and the volume is 15m³. 3 .

[0043] When using the clean water storage tank 4 for water storage, in addition to using built-in sterilizers such as ultraviolet sterilizers, external sterilizers can also be installed to achieve disinfection before use. For built-in sterilizers, multiple sterilizers can be evenly installed at the bottom according to the shape and size of the clean water storage tank 4, thereby expanding the disinfection range and improving the disinfection effect. For external sterilizers, the sterilizer is connected to the clean water storage tank 4, and the distance between them does not exceed 5 meters.

[0044] After the treated rainwater (clean water) is stored in the clean water storage tank 4, it can be reused through the reuse component 5. The reuse component 5 can be configured with appropriate structures or components according to actual needs. In practical applications, the reuse component 5 may include a variable frequency pump set 51 and a pressure tank 52. The variable frequency pump set 51 is connected to the clean water storage tank 4 and transports the rainwater in the clean water storage tank 4 to the reuse location through an output pipeline. The pressure tank 52 is located on the output pipeline. The variable frequency pump set 51 can automatically adjust its speed according to actual water demand, avoiding the variable frequency pump set 51 from operating at its rated power for a long time, reducing energy waste and achieving energy-saving operation. The pressure tank 52 can meet the water demand for small or zero flow to a certain extent, so that the variable frequency pump set 51 does not need to be started frequently, thereby reducing energy consumption, extending the service life of the variable frequency pump set 51, and reducing maintenance intensity.

[0045] In this embodiment, the rainwater reuse device replenishes water to the clean water storage tank 4 and the chemical dosing tank via a municipal water replenishment component 6. Specifically, the municipal water replenishment component 6 connects to the top of the clean water storage tank 4 and the top of the chemical dosing tank via a water replenishment pipeline. The water replenishment pipeline is connected to the municipal water supply network. The difference between the height of the outlet of the water replenishment pipeline connected to the top of the clean water storage tank 4 and the maximum liquid level of the clean water storage tank 4 is greater than *a* times the diameter of the water replenishment pipeline, where *a* ≥ 2.5. Water can be replenished by the municipal water replenishment component 6 during non-rainy seasons or when the water level in the clean water storage tank 4 is low, ensuring the continuity of rainwater reuse. The placement of the outlet of the water replenishment pipeline relative to the maximum liquid level of the clean water storage tank 4 reduces the impact of water level fluctuations and prevents backflow contamination. In addition, for rainwater recycling devices, there will be a certain amount of pollutants / excess water discharged during the collection, filtration, and storage processes. To ensure the discharge effect and safety, a collection well 7 connected to the municipal sewage network can be installed to centrally store / treat the pollutants / excess water before discharge. Specifically, the bottom of the collection well 7 can be connected to the municipal sewage network through a sewage pipe, and a pump set can be installed on the sewage pipe between the collection well 7 and the municipal sewage network for sewage discharge. In practical applications, the rainwater collection tank 12, the chemical dosing tank, the multi-stage filtration equipment, and the clean water storage tank 4 are all connected to the top of the collection well 7 through sewage pipes. Specifically, the collection well 7 centrally stores the filtered and settled pollutants and excess water before discharging them into the municipal sewage network, which can avoid the accumulation of pollutants causing pollution and difficulties in transportation. At the same time, it can also improve the rainwater absorption capacity of the entire rainwater recycling device and ensure the stability and reliability of the device.

[0046] The rainwater reuse device in this embodiment can also be equipped with a control system to achieve overall or partial control. For example, for the automatic control of the diversion in the rainwater collection and diversion component, a multi-point signal series monitoring PLC control system is adopted to ensure the quality of the effluent after rainwater treatment. The main functions of the system are: (1) determining the diversion time based on rainfall and catchment area; (2) determining the diversion time based on rainwater quality and rainfall frequency; (3) controlling the rainwater collection time based on the water level of the clean water storage tank; (4) integrating functions or equipment such as diversion, safe diversion, water level control, and rainwater treatment components for intelligent integrated operation; (5) automatic joint control of the water level of the rainwater collection tank, the water level of the clean water storage tank, and the rainwater treatment components: when the water level of the clean water storage tank is too low, the water supply valve on the corresponding water supply pipeline of the municipal water supply network is opened to replenish the backup water; rainwater collection sensing, diversion, safe diversion, water level control, and treatment are automatically integrated. The municipal water supply network, municipal sewage network, and municipal rainwater network in this rainwater reuse device are all part of the existing municipal network. The connection between the rainwater reuse device and the municipal network can be determined according to the actual situation. For example, the rainwater collection tank connected to the municipal rainwater network can also be directly connected to the municipal sewage network.

[0047] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if such modifications and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include such modifications and modifications.

Claims

1. A rainwater recycling device, characterized in that, Includes rainwater harvesting and diversion components, rainwater drive components, rainwater treatment components, clean water storage tanks, municipal water supply components, reuse components, and rainwater reuse pipelines; The rainwater harvesting and diversion assembly, rainwater treatment assembly, clean water storage tank and reuse assembly are connected in sequence through a rainwater reuse pipeline, and the rainwater drive assembly is located on the rainwater reuse pipeline between the rainwater harvesting and diversion assembly and the rainwater treatment assembly. The rainwater treatment components include a mixing device and a dosing tank. The mixing device is connected to the top of the rainwater collection and diversion component and the clean water storage tank via rainwater reuse pipelines. The bottom of the dosing tank is connected to the mixing device. The municipal water supply component is connected to the top of the clean water storage tank and the top of the chemical dosing tank through a water supply pipeline, and is also connected to the municipal water supply network through a water supply pipeline.

2. The rainwater reuse device as described in claim 1, characterized in that, The rainwater harvesting and diversion assembly includes a rainwater harvesting and diversion device and a rainwater collection tank. The first outlet of the rainwater harvesting and diversion device is connected to the top of the rainwater collection tank through a rainwater reuse pipeline. The second outlet of the rainwater harvesting and diversion device is connected to the municipal rainwater pipe network through a diversion pipeline. The bottom of the rainwater collection tank is connected to a mixing device through a rainwater reuse pipeline.

3. The rainwater reuse device as described in claim 1, characterized in that, The dosing tanks include a coagulant dosing tank and a disinfectant dosing tank. The bottom of the coagulant dosing tank is connected to the mixing equipment, and the bottom of the disinfectant dosing tank is connected to the rainwater reuse pipeline between the mixing equipment and the clean water storage tank. The tops of both the coagulant dosing tank and the disinfectant dosing tank are connected to the municipal water supply components through water supply pipelines.

4. The rainwater reuse device as described in claim 3, characterized in that, The rainwater treatment assembly also includes a multi-stage filtration system connected to the top of the mixing unit and the clean water storage tank.

5. The rainwater reuse device as described in claim 4, characterized in that, The multi-stage filtration system includes a quartz sand filter and an activated carbon filter connected via a rainwater reuse pipeline. The quartz sand filter is connected to a mixing device via the rainwater reuse pipeline, and the activated carbon filter is connected to a clean water storage tank via the rainwater reuse pipeline.

6. The rainwater reuse device as described in claim 5, characterized in that, The clean water storage tank is connected to the quartz sand filter via a backwashing pipeline, which is equipped with a backwashing pump.

7. The rainwater reuse device as described in claim 6, characterized in that, The diameter of the backwashing pipe is larger than the diameter of the rainwater reuse pipe.

8. The rainwater reuse device as described in any one of claims 4-7, characterized in that, The rainwater reuse system also includes a collection well, which is connected to the municipal sewage network via a sewage pipe. The rainwater collection and diversion components, dosing tank, multi-stage filtration equipment, and clean water storage tank are all connected to the top of the collection well via sewage pipes.

9. The rainwater reuse device as described in claim 1, characterized in that, The reuse component includes a variable frequency pump set and a pressure tank. The variable frequency pump set is connected to the clean water storage tank and transports the rainwater in the clean water storage tank to the reuse location through the output pipeline. The pressure tank is located on the output pipeline.

10. The rainwater reuse device as described in claim 1, characterized in that, The difference between the height of the outlet connecting the water supply pipeline to the top of the clean water storage tank and the maximum liquid level height of the clean water storage tank is greater than a times the diameter of the water supply pipeline, where a ≥ 2.5.

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