A multi-stage treatment device for environmentally friendly wastewater treatment

Abstract

This utility model relates to a multi-stage treatment device for environmental wastewater treatment, including a pretreatment unit, a biochemical treatment unit, a deep treatment unit, and a controller connected in series. The deep treatment unit includes a filter assembly and a disinfection assembly connected in series. The outlet of the disinfection assembly is connected to a main outlet pipe, and an electric three-way valve is installed on the main outlet pipe. This multi-stage treatment device for environmental wastewater treatment can monitor the effluent quality after deep treatment in real time by installing a water quality sensor on the main outlet pipe. Simultaneously, through the electrical connection between the controller and the water quality sensor and the electric three-way valve, when the water quality sensor detects that the water quality meets the standards, the controller can control the electric three-way valve to guide the water to the first branch pipe and into the qualified recycled water tank, ensuring that the recycled water meets the requirements and avoiding affecting the operation of the recycling equipment. When the water quality does not meet the standards, the controller controls the electric three-way valve to guide the water back to the pretreatment unit for reprocessing via the second branch pipe and the return pipe.

Description

Technical Field

[0001] This utility model relates to the field of environmental wastewater treatment technology, specifically a multi-stage treatment device for environmental wastewater treatment. Background Technology

[0002] With increasingly stringent environmental protection requirements, wastewater treatment has become a key aspect of industrial production and urban life. Wastewater treatment equipment can effectively remove pollutants from wastewater, enabling the effluent to meet discharge standards or reuse requirements.

[0003] Many wastewater treatment plants lack real-time monitoring and flexible control mechanisms for the final effluent quality, and the treated water is usually discharged directly or reused.

[0004] If the water quality does not meet the standards, it will directly cause environmental pollution or affect the normal operation of the reuse equipment, making it difficult to guarantee the stability and reliability of the effluent quality. Therefore, a multi-stage treatment device for environmental wastewater treatment is proposed to solve the above problems. Summary of the Invention

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage treatment device for environmentally friendly wastewater treatment, comprising a pretreatment unit, a biochemical treatment unit, a deep treatment unit, and a controller connected in series; the deep treatment unit includes a filter assembly and a disinfection assembly connected in series, the outlet of the disinfection assembly is connected to a main outlet pipe, the main outlet pipe is equipped with an electric three-way valve, one outlet of the electric three-way valve is provided with a first branch pipe, the electric three-way valve is connected to a qualified recycled water tank through the first branch pipe, the other outlet of the electric three-way valve is provided with a second branch pipe, the electric three-way valve is connected to a return pipe through the second branch pipe, the end of the return pipe away from the second branch pipe is connected to the inlet of the pretreatment unit; a water quality sensor is provided on the main outlet pipe and located between the disinfection assembly and the electric three-way valve, the water quality sensor is electrically connected to the controller, and the electric three-way valve is electrically connected to the controller.

[0006] Furthermore, the pretreatment unit includes a bar screen and a sedimentation tank. The effluent outlet of the bar screen is connected to the influent outlet of the sedimentation tank, and a first connecting pipe is provided between the effluent outlet of the sedimentation tank and the influent outlet of the biochemical treatment unit.

[0007] Furthermore, the biochemical treatment unit includes an anaerobic tank and an aerobic tank. The inlet of the anaerobic tank is connected to the end of the first connecting pipe away from the sedimentation tank. A second connecting pipe is provided between the outlet of the anaerobic tank and the inlet of the aerobic tank. A third connecting pipe is connected between the outlet of the aerobic tank and the inlet of the deep treatment unit. An aerator connecting pipe is provided on the right side of the aerobic tank.

[0008] Furthermore, the deep treatment unit includes a filtration component and a disinfection component. The inlet of the filtration component is connected to the end of the third connecting pipe away from the aerobic tank. A fourth connecting pipe is provided between the outlet of the filtration component and the inlet of the disinfection component. The outlet of the disinfection component is connected to one end of the main outlet pipe. The filtration component is an ultrafiltration membrane filter, and the disinfection component is an ultraviolet sterilizer.

[0009] Furthermore, the inlet of the electric three-way valve is connected to the end of the main water outlet pipe away from the disinfection component, one of the outlets is connected to one end of the first branch pipe, and the other outlet is connected to one end of the second branch pipe.

[0010] Furthermore, the return pipe is located between the second branch pipe and the pretreatment unit, and the first branch pipe is located between the outlet of the electric three-way valve and the qualified recycled water tank.

[0011] Furthermore, the water quality sensor is a turbidity sensor, and its detection end penetrates the wall of the main water outlet pipe and extends into the pipe.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] This multi-stage wastewater treatment device uses a water quality sensor installed on the main effluent pipe to monitor the effluent quality after deep treatment in real time. Simultaneously, through the electrical connection between the controller, the water quality sensor, and the electric three-way valve, when the water quality sensor detects that the water quality meets the standards, the controller can control the electric three-way valve to guide the water to the first branch pipe and into the compliant recycled water tank, ensuring that the recycled water meets the requirements and avoiding impact on the operation of the recycling equipment. When the water quality does not meet the standards, the controller controls the electric three-way valve to guide the water back to the pretreatment unit for reprocessing via the second branch pipe and the return pipe. This effectively solves the problem of environmental pollution caused by direct discharge of substandard effluent from traditional devices, improving the stability and reliability of the effluent quality. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the pre-processing unit of this utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of the biochemical treatment unit of this utility model;

[0017] Figure 4 This is a three-dimensional structural diagram of the depth processing unit of this utility model;

[0018] Figure 5 This is a schematic diagram of the internal three-dimensional structure of the main outlet pipe of this utility model.

[0019] In the diagram: 1. Pretreatment unit; 2. Biochemical treatment unit; 3. Advanced treatment unit; 4. Controller; 5. Main effluent pipe; 6. Electric three-way valve; 7. First branch pipe; 8. Standard-compliant reclaimed water tank; 9. Second branch pipe; 10. Return pipe; 11. Water quality sensor; 12. Bar screen; 13. Sedimentation tank; 14. First connecting pipe; 21. Anaerobic tank; 22. Aerobic tank; 221. Aerator connecting pipe; 23. Second connecting pipe; 24. Third connecting pipe; 31. Filter assembly; 32. Disinfection assembly; 33. Fourth connecting pipe. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-5 This embodiment of an environmentally friendly wastewater treatment multi-stage treatment device includes a pretreatment unit 1, a biochemical treatment unit 2, a deep treatment unit 3, and a controller 4 connected in series. The deep treatment unit 3 includes a filter assembly 31 and a disinfection assembly 32 connected in series. The outlet of the disinfection assembly 32 is connected to a main outlet pipe 5. An electric three-way valve 6 is provided on the main outlet pipe 5. One outlet of the electric three-way valve 6 is provided with a first branch pipe 7. The electric three-way valve 6 is connected to a qualified recycled water tank 8 through the first branch pipe 7. The other outlet of the electric three-way valve 6 is provided with a second branch pipe 9. The electric three-way valve 6 is connected to a return pipe 10 through the second branch pipe 9. The end of the return pipe 10 away from the second branch pipe 9 is connected to the inlet of the pretreatment unit 1. A water quality sensor 11 is provided on the main outlet pipe 5 and located between the disinfection assembly 32 and the electric three-way valve 6. The water quality sensor 11 is electrically connected to the controller 4. The electric three-way valve 6 is electrically connected to the controller 4.

[0022] The pretreatment unit 1 includes a bar screen 12 and a sedimentation tank 13. The bar screen 12 can perform preliminary filtration on the wastewater entering the device, intercepting larger solid impurities such as branches and plastic pieces, and preventing these impurities from entering the subsequent treatment units and causing blockages or damage to the equipment. The sedimentation tank 13 uses gravity to allow the denser suspended particles in the wastewater to settle naturally, further purifying the wastewater. The wastewater treated by the pretreatment unit 1 enters the biological treatment unit 2 through the first connecting pipe 14, providing more suitable water quality conditions for subsequent biological treatment.

[0023] The biochemical treatment unit 2 consists of an anaerobic tank 21 and an aerobic tank 22. In the anaerobic tank 21, under an anaerobic environment, anaerobic microorganisms decompose the organic matter in the wastewater into methane, carbon dioxide, etc., reducing the organic matter content of the wastewater. The wastewater treated in the anaerobic tank 21 enters the aerobic tank 22 through the second connecting pipe 23. Air is introduced through the aerator connecting pipe 221 on the right side of the aerobic tank 22 to provide sufficient oxygen for the aerobic microorganisms. Under aerobic conditions, the aerobic microorganisms further decompose the organic matter in the wastewater, making the wastewater more deeply purified. The treated wastewater enters the deep treatment unit 3 through the third connecting pipe 24.

[0024] The filtration component 31 of the deep treatment unit 3 adopts an ultrafiltration membrane filter, which can effectively remove residual fine suspended particles, colloidal substances and other substances in the wastewater, further improving the clarity of the wastewater. The filtered wastewater enters the disinfection component 32 through the fourth connecting pipe 33. The disinfection component 32 is an ultraviolet sterilizer, which uses the bactericidal effect of ultraviolet light to kill bacteria, viruses and other microorganisms in the wastewater, ensuring the hygiene and safety of the wastewater.

[0025] The disinfected wastewater enters the main outlet pipe 5. The water quality sensor 11 on the main outlet pipe 5 is a turbidity sensor. Its detection end extends into the pipe to monitor the turbidity of the wastewater in real time, thereby determining whether the wastewater quality meets the standards. The water quality sensor 11 transmits the monitoring data to the controller 4. The controller 4 analyzes the data according to the preset water quality standards. If the water quality meets the standards, the controller 4 controls the electric three-way valve 6 to switch to connect with the first branch pipe 7. The wastewater enters the qualified recycled water tank 8 through the first branch pipe 7 and can be used for subsequent reuse, ensuring the normal operation of the reuse equipment. If the water quality does not meet the standards, the controller 4 controls the electric three-way valve 6 to switch to connect with the second branch pipe 9. The wastewater enters the return pipe 10 through the second branch pipe 9 and flows back to the inlet of the pretreatment unit 1 through the return pipe 10 for re-treatment.

[0026] In summary, this multi-stage wastewater treatment device for environmental protection can monitor the effluent quality after treatment by the deep treatment unit 3 in real time by installing a water quality sensor 11 on the main effluent pipe 5. Simultaneously, through the electrical connection between the controller 4 and the water quality sensor 11 and the electric three-way valve 6, when the water quality sensor 11 detects that the water quality meets the standards, the controller 4 can control the electric three-way valve 6 to guide the water to the first branch pipe 7 and into the compliant recycled water tank 8, ensuring that the recycled water meets the requirements and avoiding impact on the operation of the recycling equipment. When the water quality does not meet the standards, the controller 4 controls the electric three-way valve 6 to guide the water back to the pretreatment unit 1 through the second branch pipe 9 and the return pipe 10 for reprocessing. This effectively solves the problem of environmental pollution caused by direct discharge of substandard effluent from traditional devices, improving the stability and reliability of the effluent quality.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage treatment device for environmental wastewater treatment, comprising a pretreatment unit (1), a biochemical treatment unit (2), a deep treatment unit (3), and a controller (4) connected in series; characterized in that: The deep treatment unit (3) includes a filter assembly (31) and a disinfection assembly (32) connected together. The outlet of the disinfection assembly (32) is connected to a main outlet pipe (5). An electric three-way valve (6) is provided on the main outlet pipe (5). One outlet of the electric three-way valve (6) is provided with a first branch pipe (7). The electric three-way valve (6) is connected to a qualified recycled water tank (8) through the first branch pipe (7). The other outlet of the electric three-way valve (6) is provided with a second branch pipe (9). The electric three-way valve (6) is connected to a return pipe (10) through the second branch pipe (9). The end of the return pipe (10) away from the second branch pipe (9) is connected to the inlet of the pretreatment unit (1). A water quality sensor (11) is provided on the main outlet pipe (5) and between the disinfection assembly (32) and the electric three-way valve (6). The water quality sensor (11) is electrically connected to the controller (4). The electric three-way valve (6) is electrically connected to the controller (4).

2. The multi-stage treatment device for environmental wastewater treatment according to claim 1, characterized in that: The pretreatment unit (1) includes a bar screen (12) and a sedimentation tank (13). The outlet of the bar screen (12) is connected to the inlet of the sedimentation tank (13). A first connecting pipe (14) is provided between the outlet of the sedimentation tank (13) and the inlet of the biochemical treatment unit (2).

3. The multi-stage treatment device for environmental wastewater treatment according to claim 2, characterized in that: The biochemical treatment unit (2) includes an anaerobic tank (21) and an aerobic tank (22). The inlet of the anaerobic tank (21) is connected to the end of the first connecting pipe (14) away from the sedimentation tank (13). A second connecting pipe (23) is provided between the outlet of the anaerobic tank (21) and the inlet of the aerobic tank (22). A third connecting pipe (24) is connected between the outlet of the aerobic tank (22) and the inlet of the deep treatment unit (3). An aerator connecting pipe (221) is provided on the right side of the aerobic tank (22).

4. The multi-stage treatment device for environmental wastewater treatment according to claim 1, characterized in that: The deep treatment unit (3) includes a filtration component (31) and a disinfection component (32). The inlet of the filtration component (31) is connected to the end of the third connecting pipe (24) away from the aerobic tank (22). A fourth connecting pipe (33) is provided between the outlet of the filtration component (31) and the inlet of the disinfection component (32). The outlet of the disinfection component (32) is connected to one end of the main outlet pipe (5). The filtration component (31) is an ultrafiltration membrane filter, and the disinfection component (32) is an ultraviolet sterilizer.

5. The multi-stage treatment device for environmental wastewater treatment according to claim 1, characterized in that: The inlet of the electric three-way valve (6) is connected to the end of the main water outlet pipe (5) away from the disinfection component (32), one of the outlets is connected to one end of the first branch pipe (7), and the other outlet is connected to one end of the second branch pipe (9).

6. The multi-stage treatment device for environmental wastewater treatment according to claim 1, characterized in that: The return pipe (10) is located between the second branch pipe (9) and the pretreatment unit (1), and the first branch pipe (7) is located between the outlet of the electric three-way valve (6) and the qualified recycled water tank (8).

7. A multi-stage treatment device for environmental wastewater treatment according to claim 1, characterized in that: The water quality sensor (11) is a turbidity sensor, and its detection end penetrates the wall of the main water outlet pipe (5) and extends into the pipe.

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