A wastewater recycling, purification and secondary utilization system

Abstract

This utility model relates to the field of wastewater recycling and purification technology, specifically a wastewater recycling and purification secondary utilization system. It includes a sink faucet, a toilet, and a recycling and purification mechanism. The sink faucet is connected to the recycling and purification mechanism for wastewater purification and recycling. The recycling and purification mechanism includes a filtration and purification component and a recycling component. The inlet of the filtration and purification component is connected to the outlet of the sink faucet, the inlet of the recycling component is connected to the outlet of the filtration and purification component, and the outlet of the recycling component is connected to the inlet of the toilet. This utility model employs a three-stage progressive treatment process: preliminary sedimentation in a wastewater filtration and sedimentation tank, filter cotton interception in a first filtration and sedimentation tank, and activated carbon adsorption in a second filtration and sedimentation tank. This ensures that the recycled water quality always meets the requirements for non-potable water such as toilet flushing, preventing pipe blockage and odor problems at the source. Compared to existing fixed purification processes, its adaptability and treatment stability are improved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater recycling and purification technology, specifically a wastewater recycling, purification, and secondary utilization system. Background Technology

[0002] With the increasing contradiction between water supply and demand, wastewater recycling, purification, and secondary utilization have become core technologies for water conservation and resource generation, especially in the construction and municipal sectors, where the demand for resource utilization of domestic wastewater and low-pollution industrial wastewater is becoming increasingly urgent. Various wastewater recycling and treatment systems have emerged in the existing technology. Among them, Chinese patent CN209941780U discloses an integrated, self-controlled greywater recycling device and system. This device divides the tank into sequentially connected sedimentation, flocculation, and filtration chambers through a central partition. Combined with a dosing component and a float-type liquid level control unit, it achieves graded treatment and basic automated operation of wastewater, solving the problems of low integration and frequent manual intervention required by traditional household wastewater reuse devices.

[0003] However, the aforementioned existing technologies still have significant limitations in practical applications: Firstly, the purification path of this system relies solely on a fixed process of "sedimentation-flocculation-filtration" and does not have an adaptive adjustment mechanism for fluctuations in wastewater quality (such as sudden changes in turbidity or differences in oil content). As a result, the treatment effect on wastewater with high suspended solids or oily wastewater is not stable enough, which can easily lead to an increased frequency of clogging of the filter components and requires regular shutdown for maintenance.

[0004] Secondly, its automatic control system only focuses on liquid level monitoring and water replenishment control, lacking real-time feedback and closed-loop control of the purification unit's operating status. For example, it cannot automatically adjust the dosage of chemicals or start the backwashing program based on the turbidity of the effluent from the filter chamber, resulting in the water quality compliance rate being greatly affected by human experience.

[0005] Third, the module connections of this device adopt a fixed partition design. When a certain processing chamber (such as the flocculation chamber) malfunctions and needs to be repaired, the operation of the entire system needs to be suspended. The compatibility and ease of maintenance need to be improved.

[0006] Furthermore, existing wastewater recycling systems (such as construction wastewater recycling devices and rural greywater treatment systems) are mostly designed for specific scenarios, resulting in narrow applicability and difficulty in adapting to diverse wastewater recycling needs. Therefore, optimizing the adaptability of the purification process and improving the system's automatic control accuracy and maintenance flexibility based on existing integration technologies has become a key direction for further improving wastewater recycling, purification, and secondary utilization technologies. Utility Model Content

[0007] The purpose of this invention is to provide a wastewater recycling, purification, and secondary utilization system to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a wastewater recycling, purification, and secondary utilization system, comprising a sink faucet, a toilet, and a recycling and purification mechanism. The sink faucet is connected to the recycling and purification mechanism for wastewater purification and recycling. The recycling and purification mechanism includes a filtration and purification component and a recycling component. The inlet of the filtration and purification component is connected to the outlet of the sink faucet, the inlet of the recycling component is connected to the outlet of the filtration and purification component, and the outlet of the recycling component is connected to the inlet of the toilet.

[0009] Furthermore, the filtration and purification assembly includes a wastewater filtration and sedimentation tank, a filtration and storage assembly, and an elevated water tank; the inlet of the wastewater filtration and sedimentation tank is connected to the outlet of the sink faucet via a wastewater recovery pipe, the inlet of the filtration and storage assembly is connected to the outlet of the wastewater filtration and sedimentation tank via a first conveying pipe, and the inlet of the elevated water tank is connected to the outlet of the filtration and storage assembly via a second conveying pipe.

[0010] Furthermore, the filtration and storage assembly includes a first filtration sedimentation tank, a second filtration sedimentation tank, and a water storage tank connected in sequence via a third conveying pipe; the first filtration sedimentation tank is equipped with filter cotton, and the second filtration sedimentation tank is equipped with activated carbon.

[0011] Furthermore, the recycling component includes a water supply pipe, a water supply pump, and a water outlet pipe; the inlet end of the water supply pipe is connected to the outlet end of the water storage tank, the outlet end of the water supply pipe is connected to the inlet end of the elevated water tank, the water supply pump is installed on the water supply pipe and located between the elevated water tank and the water storage tank, the inlet end of the water outlet pipe is connected to the outlet end of the elevated water tank, and the outlet end of the water outlet pipe is connected to the inlet end of the toilet bowl.

[0012] Furthermore, the inlet of the elevated water tank is connected to a tap water pipe, which is connected to the inlet of the sink faucet via a diverter.

[0013] Furthermore, the outlet of the elevated water tank is connected to a drain pipe, and the outlet of the toilet is connected to the drain pipe.

[0014] Furthermore, solenoid valves are installed on the first conveying pipe, the second conveying pipe, the first filtration sedimentation tank, the second filtration sedimentation tank, and the third conveying pipe, the outlet pipe, the tap water pipe, and the drain pipe between the water storage tank.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. Addressing the problems of poor adaptability, unstable handling of water quality fluctuations (such as changes in suspended solids content and odor residue), and susceptibility to pipe blockage in existing wastewater recycling systems, this invention employs a three-stage progressive treatment process: preliminary sedimentation in a wastewater filtration sedimentation tank, filter cotton retention in a first filtration sedimentation tank, and activated carbon adsorption in a second filtration sedimentation tank. This forms a targeted purification path. Preliminary sedimentation removes large particulate impurities, filter cotton precisely retains suspended solids and hair, and activated carbon deeply adsorbs organic matter, pigments, and odors. This process can stably handle fluctuations in the water quality characteristics of washing wastewater (handwashing and face washing water), ensuring that the recycled water quality always meets the requirements for non-potable water such as toilet flushing. It fundamentally avoids pipe blockage and odor problems, improving adaptability and treatment stability compared to existing fixed purification processes.

[0016] 2. Addressing the shortcomings of existing systems in the background technology, such as low self-control accuracy, lack of operational status feedback and emergency support, and susceptibility to water supply interruptions due to insufficient water volume or equipment failure, this utility model constructs a closed-loop self-control system through the collaborative design of liquid level sensors, PLC controllers, solenoid valves, and backup tap water pipes in elevated water tanks. Liquid level sensors in each water tank (sewage filtration sedimentation tank, first / second filtration sedimentation tank, water storage tank, and elevated water tank) monitor water volume in real time, and the PLC controller, in conjunction with the solenoid valves in each pipeline, precisely regulates water flow. When the water level in the elevated water tank falls below a threshold, the solenoid valve in the tap water pipe is automatically triggered to open and replenish water, requiring no manual intervention. Simultaneously, the water pump stably delivers purified water to the elevated water tank, ensuring a continuous and stable water supply for toilet flushing and completely resolving the hygiene hazards caused by insufficient self-control in existing systems.

[0017] 3. Addressing the issues of low modularity and the need for system shutdown for repair in existing systems where a single processing unit malfunctions, this invention designs the filtration and storage components as independent structures consisting of a first filtration sedimentation tank, a second filtration sedimentation tank, and a water storage tank. Each unit is independently connected to a solenoid valve via a third delivery pipe. When it is necessary to replace the filter cotton in the first filtration sedimentation tank or clean the activated carbon in the second filtration sedimentation tank, only the solenoid valve of the corresponding unit needs to be closed, and the wastewater in that tank needs to be drained. There is no need to stop the entire system's wastewater recovery and water supply processes. Furthermore, the filter media (filter cotton and activated carbon) are detachable, allowing for replacement without specialized tools, significantly reducing manual maintenance costs. This is particularly suitable for the regular maintenance needs of densely populated areas such as schools and office buildings, resolving the inconvenience of maintenance in existing systems.

[0018] 4. Addressing the limitations of existing systems in the background art, which have narrow applicability and limited water-saving benefits, this utility model is specifically designed for the high-frequency water usage scenario of washing wastewater (handwashing and facewashing water) – toilet flushing. It precisely collects washing wastewater discharged from the sink faucet via a wastewater recycling pipe, purifies it, and then directs it to the toilet bowl, forming a closed-loop system of recycling, purification, and reuse. Compared to directly using tap water for toilet flushing, it reduces tap water consumption, lowers water costs, and effectively alleviates water shortage pressure. Its water-saving benefits and scenario compatibility are superior to existing general-purpose wastewater recycling systems. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the present utility model.

[0020] In the picture: 1. Washbasin faucet; 2. Toilet and urinal; 3. Wastewater recovery pipe; 4. Sewage filtration and sedimentation tank; 5. Elevated water tank; 6. First conveying pipe; 7. Second conveying pipe; 8. Third conveying pipe; 9. First filtration and sedimentation tank; 10. Second filtration and sedimentation tank; 11. Water storage tank; 12. Water supply pipe; 13. Water supply pump; 14. Water outlet pipe; 15. Tap water pipe; 16. Drain pipe; 17. Solenoid valve. Detailed Implementation

[0021] Please see Figure 1 A wastewater recycling and purification system is disclosed, comprising a sink faucet 1, a toilet / urinal 2, and a recycling and purification mechanism. The recycling and purification mechanism consists of a filtration and purification component and a recycling component. The inlet of the filtration and purification component is connected to the outlet of the sink faucet 1, the inlet of the recycling component is connected to the outlet of the filtration and purification component, and the outlet of the recycling component is connected to the inlet of the toilet / urinal 2. This system purifies the washing wastewater generated by the sink faucet 1 (or wastewater generated by showerheads or other equipment) and then uses it for flushing the toilet / urinal 2, thus achieving wastewater reuse.

[0022] Specifically, The filtration and purification assembly consists of a wastewater filtration and sedimentation tank 4, a filtration and storage component, and an elevated water tank 5. The inlet of the wastewater filtration and sedimentation tank 4 is connected to the outlet of the washing sink faucet 1 via a wastewater recovery pipe 3, allowing for preliminary sedimentation of the generated washing wastewater. The filtration and storage component consists of a first filtration and sedimentation tank 9, a second filtration and sedimentation tank 10, and a storage tank 11, connected sequentially via a third conveying pipe 8. The first filtration and sedimentation tank 9 is equipped with filter cotton to trap large particles, while the second filtration and sedimentation tank 10 is filled with activated carbon to adsorb small molecule pollutants such as pigments and odors. The outlet of the wastewater filtration and sedimentation tank 4 is connected to the inlet of the first filtration and sedimentation tank 9 via a first conveying pipe 6. The inlet of the elevated water tank 5 is connected to the outlet of the storage tank 11 in the filtration and storage assembly via a second conveying pipe 7.

[0023] The recycling assembly consists of a water supply pipe 12, a water supply pump 13, and an outlet pipe 14. The inlet of the water supply pipe 12 is connected to the outlet of the water storage tank 11, and the outlet of the water supply pipe 12 is connected to the inlet of the elevated water tank 5. The inlet of the elevated water tank 5 is also connected to a tap water pipe 15, which is equipped with a backflow preventer and a solenoid valve 17. When the water level in the elevated water tank 5 is insufficient, tap water is automatically added. The tap water pipe 15 is also connected to the inlet of the sink faucet 1 through a diverter for use in washing. The outlet of the elevated water tank 5 is also connected to a drain pipe 16, and the outlet of the toilet 2 is connected to the drain pipe 16. The drain pipe 16 is connected to the sewage treatment pipe to drain excess water from flushing the toilet and the elevated water tank 5. The sewage filtration and sedimentation tank 4 is also connected to the drain pipe 16 to drain the corresponding wastewater. A water supply pump 13 is installed on the water supply pipe 12 and located between the elevated water tank 5 and the water storage tank 11, and is used to lift water to the elevated water tank 5. The inlet end of the outlet pipe 14 is connected to the outlet end of the elevated water tank 5, and the outlet end of the outlet pipe 14 is connected to the inlet end of the toilet 2, so as to deliver the water from the elevated water tank 5 to the toilet 2 for flushing.

[0024] Solenoid valves 17 are installed on key pipelines including wastewater recovery pipe 3, first conveying pipe 6, second conveying pipe 7, third conveying pipe 8, outlet pipe 14, tap water pipe 15, and drain pipe 16. Liquid level sensors are installed in the wastewater filtration sedimentation tank 4, first filtration sedimentation tank 9, second filtration sedimentation tank 10, water storage tank 11, and elevated water tank 5. The solenoid valve 17 on wastewater recovery pipe 3 is interlocked with the liquid level sensor in wastewater filtration sedimentation tank 4 via a PLC controller to control the amount of water entering wastewater filtration sedimentation tank 4. The solenoid valve 17 on first conveying pipe 6 is interlocked with the liquid level sensor in first filtration sedimentation tank 9 via a PLC controller to control the amount of water entering first filtration sedimentation tank 9. The solenoid valve 17 on third conveying pipe 8, connected to the outlet of first filtration sedimentation tank 9, is interlocked with the liquid level sensor in second filtration sedimentation tank 10 to control the amount of water entering second filtration sedimentation tank 10. The solenoid valve 17 on the third delivery pipe 8 connected to the outlet of the second filtration sedimentation tank 10 is interlocked with the liquid level sensor in the water storage tank 11 via a PLC controller to control the amount of water entering the water storage tank 11. The solenoid valves 17 on the outlet pipe 14, the tap water pipe 15, and the drain pipe 16 are all interlocked with the liquid level sensor in the high-level water tank 5 via a PLC controller, and switch between adding tap water and discharging water according to the liquid level in the high-level water tank 5.

[0025] Working principle of this utility model: 1. Wastewater recycling and filtration process Preliminary sedimentation: Washing wastewater discharged from the faucet 1 of the washing pool or the shower spray equipment flows by gravity into the sewage filtration sedimentation tank 4 through the wastewater recovery pipe 3. After a period of sedimentation, larger particles of impurities settle to the bottom of the tank, while the upper wastewater flows into the first filtration sedimentation tank 9 through the first conveying pipe 6.

[0026] Multi-stage filtration: The filter cotton in the first filtration sedimentation tank 9 further traps suspended solids, hair and other impurities, and the wastewater flows into the second filtration sedimentation tank 10 through the third conveying pipe 8.

[0027] The activated carbon in the second filtration sedimentation tank 10 removes organic matter, pigments and odors from the wastewater through adsorption, and the purified water flows to the storage tank 11 for storage.

[0028] Water supply and backup mechanisms: Wastewater in the water storage tank 11 is lifted to the high-level water tank 5 through the water supply pipe 12 and the water supply pump 13. The high-level water tank provides flushing water for the toilet urinals 2 through the water outlet pipe 14.

[0029] When the water level in the high-level water tank 5 is lower than the set threshold, the liquid level sensor triggers the solenoid valve on the tap water pipe 15 to open, automatically replenishing tap water and preventing interruption of toilet flushing; when the water level returns to normal, the solenoid valve closes and stops replenishing water.

[0030] 2. Maintenance Process During summer and winter vacations or regular maintenance, close all solenoid valves 17, drain the wastewater from the system, replace the filter cotton in the first filtration sedimentation tank 9 in sequence, and clean the dirt in each water tank and pipe to ensure long-term stable operation of the system.

Claims

1. A wastewater recycling purification secondary utilization system, comprising a wash basin faucet (1), a toilet (2), and a recycling purification mechanism, the wash basin faucet (1) being connected with the recycling purification mechanism for sewage purification and recycling utilization, characterized in that, The recycling and purification mechanism includes a filtration and purification component and a recycling component; the inlet of the filtration and purification component is connected to the drain of the sink faucet (1), the inlet of the recycling component is connected to the outlet of the filtration and purification component, and the outlet of the recycling component is connected to the inlet of the toilet (2).

2. The secondary utilization system as described in claim 1, characterized in that, The filtration and purification assembly includes a sewage filtration sedimentation tank (4), a filtration storage assembly, and a high-level water tank (5). The inlet of the sewage filtration sedimentation tank (4) is connected to the outlet of the sink faucet (1) via a wastewater recovery pipe (3). The inlet of the filtration storage assembly is connected to the outlet of the sewage filtration sedimentation tank (4) via a first conveying pipe (6). The inlet of the high-level water tank (5) is connected to the outlet of the filtration storage assembly via a second conveying pipe (7).

3. The secondary utilization system as described in claim 2, characterized in that, The filtration and storage assembly includes a first filtration sedimentation tank (9), a second filtration sedimentation tank (10), and a water storage tank (11) connected in sequence through a third conveying pipe (8); the first filtration sedimentation tank (9) is provided with filter cotton, and the second filtration sedimentation tank (10) is provided with activated carbon.

4. The secondary utilization system as described in claim 3, characterized in that, The recycling components include a water supply pipe (12), a water supply pump (13), and an outlet pipe (14); the inlet end of the water supply pipe (12) is connected to the outlet end of the water storage tank (11), the outlet end of the water supply pipe (12) is connected to the inlet end of the high-level water tank (5), the water supply pump (13) is installed on the water supply pipe (12) and located between the high-level water tank (5) and the water storage tank (11), the inlet end of the outlet pipe (14) is connected to the outlet end of the high-level water tank (5), and the outlet end of the outlet pipe (14) is connected to the inlet end of the toilet urinal (2).

5. The secondary utilization system as described in claim 3, characterized in that, The water inlet of the high-level water tank (5) is connected to a tap water pipe (15), and the tap water pipe (15) is connected to the water inlet of the sink faucet (1) through a diverter.

6. The secondary utilization system as described in claim 3, characterized in that, The outlet of the high-level water tank (5) is connected to a drain pipe (16), and the outlet of the toilet (2) is connected to the drain pipe (16).

7. The secondary utilization system as described in claim 3, characterized in that, Solenoid valves (17) are provided on the third conveying pipe (8), water outlet pipe (14), tap water pipe (15), and drain pipe (16) between the first conveying pipe (6), the second conveying pipe (7), the first filtration sedimentation tank (9), the second filtration sedimentation tank (10), and the water storage tank (11).

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