Rain sewage treatment system based on MBBR (moving bed biofilm reactor) and magnetic coagulation of hydraulic load

Abstract

The invention provides an MBBR (moving bed biofilm reactor) and magnetic coagulation rain sewage treatment system based on hydraulic load, and belongs to the technical field of sewage treatment, the MBBR and magnetic coagulation rain sewage treatment system based on hydraulic load comprises a primary sewage treatment box; the magnetic coagulation sewage discharging mechanism comprises a magnetic sewage discharging groove, a floating foam adsorption cylinder, a magnetic adsorption plate, a lifting sliding groove, a lifting sliding plate, a lifting supporting spring, a cleaning indicating lamp, a contact sensor and a lifting push plate, the magnetic sewage discharging groove is formed in the upper end of the primary sewage treatment box, and the floating foam adsorption cylinder is slidably connected into the magnetic sewage discharging groove; by arranging a magnetic adsorption plate and floating foam adsorption cylinder structure and combining a magnetic coagulation process, floccules and floating foam in sewage can be quickly adsorbed and intensively collected.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically relating to a rainwater and wastewater treatment system based on hydraulic load MBBR and magnetic coagulation. Background Technology

[0002] In existing technologies, in the field of wastewater treatment, especially in the treatment of rainwater, urban sewage or industrial wastewater, the pretreatment and removal of scum and flocculent matter is an important step to ensure the stable operation of subsequent treatment processes.

[0003] Authorization notice number "CN106927605B" discloses a wastewater treatment device, including a flocculation mixing chamber, a flocculation sedimentation chamber, a purified water tank, a composite activated carbon treatment chamber, an amorphous alloy treatment chamber, and a greywater storage chamber. Through the design and improvement of various components, especially those in the flocculation sedimentation chamber, flocculation and sedimentation efficiency are enhanced. Furthermore, without increasing the treatment space, multiple steps of flocculation, sedimentation, and condensation are achieved simultaneously, making small- to medium-sized, high-efficiency wastewater treatment a reality.

[0004] The invention achieves multiple steps of flocculation, sedimentation and condensation simultaneously, making small- and medium-sized efficient wastewater treatment a reality. However, it still lacks a centralized collection and automatic cleaning mechanism for flocs and foam, which leads to the accumulation of foam and flocs during continuous operation and makes it difficult to remove them in time, affecting the stability and automation of the system. Summary of the Invention

[0005] The purpose of this invention is to provide a stormwater and sewage treatment system based on hydraulic load MBBR and magnetic coagulation, which aims to solve the problem that existing technologies still lack a centralized collection and automatic cleaning mechanism for flocculent matter and foam, resulting in the easy accumulation of foam and flocculent matter during continuous operation, which is difficult to remove in a timely manner and affects the stability and automation level of the system.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A stormwater and wastewater treatment system based on hydraulic loading-driven MBBR and magnetic coagulation includes:

[0008] Wastewater primary treatment tank;

[0009] A magnetic coagulation sewage discharge mechanism includes a magnetic discharge trough, a foam adsorption cylinder, a magnetic adsorption plate, a lifting chute, a lifting slide plate, a lifting support spring, a cleaning indicator light, a contact sensor, and a lifting push plate. The magnetic discharge trough is located at the upper end of the primary sewage treatment tank. The foam adsorption cylinder is slidably connected to the magnetic discharge trough. The magnetic adsorption plate is fixedly connected to the lower end of the foam adsorption cylinder and is made of permanent magnet material. The lifting chute is located at the upper end of the magnetic discharge trough. The lifting slide plate is slidably connected to the lifting chute. The lifting support spring is fixedly connected to the lower inner wall of the lifting chute and the lower end of the lifting slide plate. The cleaning indicator light is fixedly connected to one side of the magnetic discharge trough. The contact sensor is fixedly connected to the lower inner wall of the lifting chute and electrically connected to the cleaning indicator light. The lifting push plate is fixedly connected to one side of the foam adsorption cylinder and slides within the lifting chute.

[0010] The primary wastewater treatment tank is equipped with magnetically attracted metal gravel.

[0011] As a preferred embodiment of the present invention, a sliding limit block is provided on one inner wall of the lifting slide, and the upper end of the sliding limit block is parallel to the upper end of the contact sensor.

[0012] In a preferred embodiment of the present invention, the lower end of the magnetic adsorption plate is disposed inside the primary sewage treatment tank and is obliquely distributed, and a filter hole is provided on one side of the magnetic adsorption plate.

[0013] As a preferred embodiment of the present invention, the lower inner wall of the magnetic adsorption plate is provided with a storage groove, the storage groove is provided with a drainage hole, and the upper end of the foam adsorption cylinder is fixedly connected with a storage handle.

[0014] As a preferred embodiment of the present invention, a rotating sleeve is fixedly connected to one inner wall of the primary sewage treatment tank, a driving rod is rotatably connected inside the rotating sleeve, and a driving auger is fixedly connected to the circumferential surface of the driving rod.

[0015] As a preferred embodiment of the present invention, a motor sleeve is fixedly connected to one side of the primary sewage treatment tank, a drive motor is fixedly connected inside the motor sleeve, and the output end of the drive motor is fixed to the drive auger.

[0016] As a preferred embodiment of the present invention, a short-shaft auger is provided on one side of the driving auger, and water passage holes are provided on the inner circumferential walls of the driving auger and the short-shaft auger.

[0017] As a preferred embodiment of the present invention, the upper end of the primary sewage treatment tank is provided with a sewage inlet, the inner wall of the sewage inlet is provided with a sand inlet, and a magnetic sand output funnel is provided inside the sand inlet.

[0018] As a preferred embodiment of the present invention, a sewage outlet is provided on one inner wall of the primary sewage treatment tank, a connecting pipe is fixedly connected to one end of the sewage outlet, and a secondary treatment tank is fixedly connected to one end of the connecting pipe.

[0019] As a preferred embodiment of the present invention, the secondary treatment tank is provided with multiple sets of biofilm filter plates, each set of biofilm filter plates having filter holes, and a drainage connection flange is fixedly connected to one side of the primary wastewater treatment tank.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. By setting up a magnetic adsorption plate and a foam adsorption cylinder structure, combined with magnetic coagulation technology, it can quickly adsorb and collect flocculent matter and foam in sewage, significantly improving the efficiency of primary treatment and ensuring the stable operation of subsequent treatment units.

[0022] 2. Equipped with components such as lifting slides, contact sensors, and cleaning indicator lights, it enables real-time monitoring of the load status of the foam adsorption cylinder and automatically prompts when cleaning is required, reducing the frequency of manual inspections and improving the equipment's intelligence and continuous operation capabilities.

[0023] 3. The overall modular design integrates magnetic coagulation and MBBR processes, making it suitable for various scenarios such as rainwater treatment, urban initial rainwater storage, and industrial park pretreatment. It has a high space utilization rate and is particularly suitable for small and medium-sized wastewater treatment needs. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a three-dimensional structural view of the present invention;

[0026] Figure 2 This is a cross-sectional view of the structure in this invention;

[0027] Figure 3 This is an exploded cross-sectional view of the first structure in this invention;

[0028] Figure 4 This is an exploded cross-sectional view of the second structure in this invention;

[0029] Figure 5 This is an exploded cross-sectional view of the third structure in this invention;

[0030] Figure 6 For the present invention Figure 3 Enlarged view of point A in the middle;

[0031] Figure 7For the present invention Figure 3 Enlarged view of point B in the middle;

[0032] Figure 8 For the present invention Figure 4 Enlarged view of point C in the middle.

[0033] In the diagram: 1. Primary wastewater treatment tank; 2. Magnetic discharge trough; 3. Foam adsorption cylinder; 4. Magnetic adsorption plate; 5. Drive rod; 6. Lifting slide; 7. Lifting slide plate; 8. Lifting support spring; 9. Cleaning indicator light; 10. Contact sensor; 11. Lifting push plate; 12. Sliding limit block; 13. Filter hole; 14. Storage groove; 15. Storage handle; 16. Rotating sleeve; 17. Motor sleeve; 18. Drive motor; 19. Drive auger; 20. Short shaft auger; 21. Water passage hole; 22. Wastewater inlet; 23. Sand inlet; 24. Magnetic sand output funnel; 25. Wastewater outlet; 26. Connecting pipe; 27. Secondary treatment tank; 28. Biofilm filter plate; 29. ​​Filter hole; 30. Drainage connection flange. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1

[0036] Please see Figures 1-8 The present invention provides the following technical solutions:

[0037] A stormwater and wastewater treatment system based on hydraulic loading-driven MBBR and magnetic coagulation includes:

[0038] Wastewater primary treatment tank 1;

[0039] The magnetic coagulation sewage discharge mechanism includes a magnetic sewage discharge trough 2, a foam adsorption cylinder 3, a magnetic adsorption plate 4, a lifting chute 6, a lifting slide plate 7, a lifting support spring 8, a cleaning indicator light 9, a contact sensor 10, and a lifting push plate 11. The magnetic sewage discharge trough 2 is located at the upper end of the primary sewage treatment tank 1. The foam adsorption cylinder 3 is slidably connected to the magnetic sewage discharge trough 2. The magnetic adsorption plate 4 is fixedly connected to the lower inner part of the foam adsorption cylinder 3. The magnetic adsorption plate 4 is made of permanent magnet material. The lifting chute 6 is located at the upper end of the magnetic sewage discharge trough 2. The lifting slide plate 7 is slidably connected to the lifting chute 6. The lifting support spring 8 is fixedly connected to the lower inner wall of the lifting chute 6 and the lower end of the lifting slide plate 7. The cleaning indicator light 9 is fixedly connected to one side of the magnetic sewage discharge trough 2. The contact sensor 10 is fixedly connected to the lower inner wall of the lifting chute 6 and electrically connected to the cleaning indicator light 9. The lifting push plate 11 is fixedly connected to one side of the foam adsorption cylinder 3 and slides within the lifting chute 6.

[0040] The primary wastewater treatment tank 1 is equipped with magnetically attracted metal gravel.

[0041] In a specific embodiment of the present invention, a magnetic discharge trough 2 is provided at the upper end of the primary sewage treatment tank 1. A foam adsorption cylinder 3 can be installed and removed inside the magnetic discharge trough 3. The foam adsorption cylinder 3 is used to adsorb foam from the water surface and flocculent matter formed by magnetic coagulation. The magnetic adsorption plate 4 is made of permanent magnet material and can effectively adsorb pollutant flocs containing magnetic powder. When inserted into the primary sewage treatment tank 1, its lower end contacts the sewage. The lower end of the lifting slide plate 7 is fixedly connected to the lower inner wall of the lifting slide trough 6 through a lifting support spring 8, providing buffering and support. A cleaning indicator light 9 is fixedly connected to one side of the magnetic discharge trough 2 to prompt the operator to clean the foam adsorption cylinder 3. When the foam adsorption cylinder 3 sinks to a certain position due to excessive adsorption of pollutants, the contact sensor 10 is triggered, illuminating the cleaning indicator light 9. In actual operation, rainwater or sewage to be treated enters from the top of the primary sewage treatment tank 1. Magnetic sand is added simultaneously at the inlet, allowing the magnetic sand to interact with the pollutants in the sewage. Suspended particles and organic pollutants undergo a coagulation reaction, forming magnetic flocs. Due to the strong magnetism of the magnetic adsorption plate 4, these magnetic flocs are adsorbed into the foam adsorption cylinder 3. At the same time, some foam floating on the water surface is also adsorbed and aggregated. As the adsorption process continues, a large amount of pollutants gradually accumulate inside the foam adsorption cylinder 3, increasing its weight. This causes the foam adsorption cylinder 3 to move downward and compress the lifting support spring 8, causing it to contract. The downward movement of the foam adsorption cylinder 3 drives the lifting push plate 11 to move downward as well. When the lifting push plate 11 touches the contact sensor 10 located at the bottom of the lifting slide 6, the contact sensor 10 connects the circuit and illuminates the cleaning indicator light 9, reminding the staff to clean the pollutants in the foam adsorption cylinder 3 in time or to remove and replace the foam adsorption cylinder 3. The magnetic adsorption plate 4, in conjunction with the foam adsorption cylinder 3, can efficiently remove suspended solids and heavy metal ions. Through physical adsorption and chemical coagulation, the agglomeration effect of pollutants is enhanced, resulting in larger and heavier flocs that are easier to settle and separate.

[0042] Please refer to the details. Figures 1-8 A sliding limit block 12 is provided on one inner wall of the lifting slide 6, and the upper end of the sliding limit block 12 is parallel to the upper end of the contact sensor 10.

[0043] In this embodiment: to ensure the accuracy of the triggering action and the timeliness of the response, the upper surface of the sliding limit block 12 and the upper surface of the contact sensor 10 are kept at the same horizontal level and arranged in parallel to limit the downward sliding height of the foam adsorption cylinder 3.

[0044] Please refer to the details. Figures 1-8 The lower end of the magnetic adsorption plate 4 is located inside the primary sewage treatment tank 1 and is distributed at an angle. A filter hole 13 is opened on one side of the magnetic adsorption plate 4.

[0045] In this embodiment: the magnetic adsorption plate 4 is fixedly connected to the lower part of the foam adsorption cylinder 3, and its lower end extends into the interior of the primary sewage treatment tank 1 and is arranged at an angle. This inclined arrangement is conducive to increasing the contact area between the magnetic adsorption plate 4 and the magnetic flocculents in the sewage, improving the adsorption efficiency of pollutants, and at the same time, it is convenient for the adsorbed pollutants to slide down the inclined surface under the action of gravity and water flow, reducing the risk of accumulation and blockage. A filter hole 13 is provided on one side of the magnetic adsorption plate 4. The filter hole 13 penetrates the plate body of the magnetic adsorption plate 4 and is used to discharge the excess water accumulated inside the foam adsorption cylinder 3 during the adsorption process.

[0046] Please refer to the details. Figures 1-8 The magnetic adsorption plate 4 has a storage groove 14 on its lower inner wall, and a drain hole is provided in the storage groove 14. The upper end of the foam adsorption tube 3 is fixedly connected to a storage handle 15.

[0047] In this embodiment, a storage groove 14 is provided on the lower inner wall of the magnetic adsorption plate 4. This groove is used to collect magnetic flocculent pollutants that have been adsorbed and detached from the sewage, preventing them from being resuspended or blocking the water flow channel. A drain hole is provided inside the storage groove 14. This drain hole penetrates the bottom of the magnetic adsorption plate 4, allowing some of the sewage that has not been completely adsorbed to be discharged through this hole, keeping the water flow in the adsorption area unobstructed, while avoiding the accumulation of pollutants that may affect the adsorption efficiency.

[0048] Please refer to the details. Figures 1-8 A rotating sleeve 16 is fixedly connected to one inner wall of the primary sewage treatment tank 1. A drive rod 5 is rotatably connected inside the rotating sleeve 16. A drive auger 19 is fixedly connected to the circumferential surface of the drive rod 5.

[0049] In this embodiment: one end of the drive rod 5 is inserted into the rotating sleeve 16 and forms a rotatable engagement with it, while the other end extends to the outside of the primary sewage treatment tank 1 and is connected to the drive equipment. A drive auger 19 is fixedly connected to the circumferential surface of the drive rod 5. The drive auger 19 has a spiral structure and can rotate synchronously with the drive rod 5 to agitate the sewage. When the drive motor 18 drives the drive rod 5 to rotate, the drive auger 19 rotates accordingly, forming a vortex and shear force in the sewage, so that the added magnetic sand is fully mixed with the pollutants in the sewage, promoting the rapid progress of the magnetic coagulation reaction. During the rotation of the auger, the sewage diffuses outward due to centrifugal force, and the flocculent material containing magnetic sand is thrown towards the inner wall of the primary sewage treatment tank 1 and flows closely against the inner wall. At this time, the magnetic adsorption plate 4 arranged on the upper part of the primary sewage treatment tank 1 and near the inner wall has a strong adsorption effect on these magnetic flocculent pollutants, capturing and aggregating them, thereby completing efficient solid-liquid separation.

[0050] Please refer to the details. Figures 1-8A motor sleeve 17 is fixedly connected to one side of the primary sewage treatment tank 1. A drive motor 18 is fixedly connected inside the motor sleeve 17. The output end of the drive motor 18 is fixed to the drive auger 19.

[0051] In this embodiment: the drive motor 18 is fixedly connected inside the motor sleeve 17. The output shaft of the drive motor 18 is connected to one end of the drive rod 5 by direct insertion. When the drive motor 18 starts, it drives the drive auger 19 to rotate synchronously, generating swirling and centrifugal force in the sewage, causing the flocculent pollutants containing magnetic sand to move towards the inner wall of the sewage primary treatment tank 1 and adhere to the vicinity of the inner wall, which facilitates efficient adsorption and separation by the magnetic adsorption plate 4.

[0052] Please refer to the details. Figures 1-8 A short-shaft auger 20 is provided on one side of the drive auger 19, and water passage holes 21 are provided on the inner circumference of the drive auger 19 and the short-shaft auger 20.

[0053] In this embodiment: To enhance the stirring effect and avoid structural interference, a short-shaft auger 20 is further provided on one side of the driving auger 19. The short-shaft auger 20 serves as an auxiliary stirring component, forming a continuous but shorter spiral structure with the main auger. This helps improve the water circulation in the area near the inner wall of the primary sewage treatment tank 1, preventing dead zone deposition. The cross-sectional dimension of the short-shaft auger 20 is smaller than that of the driving auger 19, allowing it to effectively avoid contact or scraping with the magnetic adsorption plate 4 located on the upper part of the primary sewage treatment tank 1 during rotation, thereby ensuring the stability and safety of the equipment operation. Water passage holes 21 are provided on the inner circumference of both the driving auger 19 and the short-shaft auger 20. These water passage holes 21 penetrate the auger blades, allowing some sewage to pass smoothly during its rotation. This reduces water flow resistance and avoids water flow turbulence or blockage caused by excessive local pressure, ensuring that the entire stirring system operates smoothly and with low energy consumption.

[0054] Please refer to the details. Figures 1-8 The upper end of the primary sewage treatment tank 1 is provided with a sewage inlet 22, and the inner wall of the sewage inlet 22 is provided with a sand inlet 23. A magnetic sand output funnel 24 is provided inside the sand inlet 23.

[0055] In this embodiment: The upper end of the primary sewage treatment tank 1 is provided with a sewage inlet 22, which serves as the inlet for rainwater or sewage to enter the system. The inlet is located at the top of the tank and on the other side of the magnetic sewage discharge trough 2. The inner wall of the sewage inlet 22 is provided with a sand inlet 23. The sand inlet 23 is provided with a magnetic sand output funnel 24. The magnetic sand output funnel 24 releases magnetic sand synchronously, so that the magnetic sand and sewage are fully mixed to form magnetic flocculent material.

[0056] Please refer to the details. Figures 1-8A sewage outlet 25 is provided on one inner wall of the primary sewage treatment tank 1. A connecting pipe 26 is fixedly connected to one end of the sewage outlet 25, and a secondary treatment tank 27 is fixedly connected to one end of the connecting pipe 26.

[0057] In this embodiment: A sewage outlet 25 is provided on one inner wall of the primary sewage treatment tank 1. The outlet is located outside the rotating sleeve 16 in the tank body. One end of the connecting pipe 26 is sealed to the sewage outlet 25, and the other end extends into the secondary treatment tank 27 or is connected to its inlet. The secondary treatment tank 27 serves as a deep treatment unit and is equipped with structures such as a biofilm filter plate 28 inside, which are used to further remove residual organic pollutants and trace suspended solids in the sewage.

[0058] Please refer to the details. Figures 1-8 The secondary treatment tank 27 is equipped with multiple sets of biofilm filter plates 28, each of which has filter holes 29. A drainage connection flange 30 is fixedly connected to one side of the primary wastewater treatment tank 1.

[0059] In this embodiment: After primary treatment, wastewater enters the secondary treatment tank 27 through connecting pipe 26. This tank receives the intermediate effluent after the initial removal of suspended solids and magnetic flocculents, and further performs deep purification. The secondary treatment tank 27 contains several sets of biofilm filter plates 28. These filter plates are modularly arranged and vertically installed in the water flow channel. Each set of biofilm filter plates 28 has highly efficient microbial communities that degrade organic pollutants attached to its surface and interior, forming a stable biofilm layer. When wastewater flows through the filter plates, residual organic matter, ammonia nitrogen, and trace amounts of phosphorus are adsorbed and decomposed by the biofilm, thereby achieving improved water quality. To further purify the water, improve water flow efficiency, and ensure treatment effectiveness, multiple sets of biofilm filter plates 28 are equipped with filter holes 29. These filter holes 29 penetrate the main body of the filter plate and are evenly distributed or arranged in a multi-level gradient. This effectively intercepts fine particles without causing water flow blockage, while providing a good attachment environment and mass transfer conditions for the biofilm. A drainage connection flange 30 is also fixedly connected to one side of the primary wastewater treatment tank 1. This flange serves as the final outlet of the entire device and is used to connect to external drainage pipes or subsequent reuse systems. The treated water that meets the standards after primary and secondary treatment is stably discharged through this flange, enabling continuous operation.

[0060] The working principle and usage process of this invention: Rainwater or sewage to be treated enters from the top of the primary sewage treatment tank 1. Magnetic sand is added simultaneously at the inlet, causing the magnetic sand to react with suspended particles and organic pollutants in the sewage to form magnetic flocs. Due to the strong magnetism of the magnetic adsorption plate 4, these magnetic flocs are adsorbed into the foam adsorption cylinder 3. At the same time, some of the foam floating on the water surface is also adsorbed and aggregated. As the adsorption process continues, a large amount of pollutants gradually accumulates inside the foam adsorption cylinder 3, increasing its weight and causing the foam adsorption cylinder 3 to move downwards and squeeze out pollutants. When the lifting support spring 8 contracts, the downward movement of the foam adsorption cylinder 3 causes the lifting push plate 11 to move downward together. When the lifting push plate 11 touches the contact sensor 10 located at the bottom of the lifting slide 6, the contact sensor 10 connects the circuit and illuminates the cleaning indicator light 9, reminding the staff to clean the pollutants in the foam adsorption cylinder 3 in time or to remove and replace the foam adsorption cylinder 3. The magnetic adsorption plate 4, together with the foam adsorption cylinder 3, can efficiently remove suspended solids and heavy metal ions. Through physical adsorption and chemical coagulation, the coagulation effect of pollutants is enhanced, resulting in larger and heavier flocs that are easier to settle and separate.

[0061] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A stormwater and wastewater treatment system based on hydraulic load-driven MBBR and magnetic coagulation, characterized in that: include: Wastewater primary treatment tank (1); The magnetic coagulation sewage discharge mechanism includes a magnetic discharge trough (2), a foam adsorption cylinder (3), a magnetic adsorption plate (4), a lifting slide (6), a lifting slide plate (7), a lifting support spring (8), a cleaning indicator light (9), a contact sensor (10), and a lifting push plate (11). The magnetic discharge trough (2) is located at the upper end of the primary sewage treatment tank (1). The foam adsorption cylinder (3) is slidably connected to the magnetic discharge trough (2). The magnetic adsorption plate (4) is fixedly connected to the lower end of the foam adsorption cylinder (3). The magnetic adsorption plate (4) is made of permanent magnet material. The lifting chute (6) is located at the upper end of the magnetic sewage trough (2), the lifting slide plate (7) is slidably connected to the lifting chute (6), the lifting support spring (8) is fixedly connected to the lower inner wall of the lifting chute (6) and the lower end of the lifting slide plate (7), the cleaning indicator light (9) is fixedly connected to one side of the magnetic sewage trough (2), the contact sensor (10) is fixedly connected to the lower inner wall of the lifting chute (6) and electrically connected to the cleaning indicator light (9), and the lifting push plate (11) is fixedly connected to one side of the foam adsorption cylinder (3) and slides in the lifting chute (6). The primary wastewater treatment tank (1) is equipped with magnetically attracted metal gravel.

2. The rainwater and sewage treatment system based on hydraulic load and magnetic coagulation according to claim 1, characterized in that: A sliding limit block (12) is provided on one side of the inner wall of the lifting slide (6), and the upper end of the sliding limit block (12) is parallel to the upper end of the contact sensor (10).

3. A stormwater and sewage treatment system based on hydraulic load and magnetic coagulation according to claim 2, characterized in that: The lower end of the magnetic adsorption plate (4) is located inside the primary sewage treatment tank (1) and is distributed at an angle. A filter hole (13) is opened on one side of the magnetic adsorption plate (4).

4. A stormwater and sewage treatment system based on hydraulic load and magnetic coagulation according to claim 3, characterized in that: The magnetic adsorption plate (4) has a storage groove (14) on its lower inner wall, and a water drain hole is provided in the storage groove (14). The upper end of the foam adsorption cylinder (3) is fixedly connected to a storage handle (15).

5. A stormwater and sewage treatment system based on hydraulic load and magnetic coagulation according to claim 4, characterized in that: A rotating sleeve (16) is fixedly connected to one inner wall of the primary sewage treatment tank (1), and a driving rod (5) is rotatably connected inside the rotating sleeve (16). A driving auger (19) is fixedly connected to the circumferential surface of the driving rod (5).

6. A stormwater and sewage treatment system based on hydraulic load and magnetic coagulation according to claim 5, characterized in that: A motor sleeve (17) is fixedly connected to one side of the primary sewage treatment tank (1), and a drive motor (18) is fixedly connected inside the motor sleeve (17). The output end of the drive motor (18) is fixed to the drive auger (19).

7. A stormwater and sewage treatment system based on hydraulic load and magnetic coagulation according to claim 6, characterized in that: A short-shaft auger (20) is provided on one side of the drive auger (19), and water passage holes (21) are provided on the inner circumference of the drive auger (19) and the short-shaft auger (20).

8. A stormwater and sewage treatment system based on hydraulic load and magnetic coagulation according to claim 7, characterized in that: The upper end of the primary sewage treatment tank (1) is provided with a sewage inlet (22), and the inner wall of the sewage inlet (22) is provided with a sand inlet (23). A magnetic sand output funnel (24) is provided inside the sand inlet (23).

9. A stormwater and sewage treatment system based on hydraulic load and magnetic coagulation according to claim 8, characterized in that: The sewage primary treatment tank (1) has a sewage outlet (25) on one side of its inner wall. A connecting pipe (26) is fixedly connected to one side of the sewage outlet (25), and a secondary treatment tank (27) is fixedly connected to one side of the connecting pipe (26).

10. A stormwater and sewage treatment system based on hydraulic load-driven MBBR and magnetic coagulation according to claim 9, characterized in that: The secondary treatment tank (27) is equipped with multiple sets of biofilm filter plates (28), and each set of biofilm filter plates (28) has filter holes (29). A drainage connection flange (30) is fixedly connected to one side of the primary sewage treatment tank (1).

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