Sewage treatment and purification equipment with multi-stage filtering structure

Abstract

The utility model belongs to purification equipment technical field especially has sewage treatment purification equipment with multistage filtration structure, including primary sedimentation tank, one end of primary sedimentation tank is equipped with sewage feed pipe, the inside of primary sedimentation tank is equipped with first filter screen, the other end of primary sedimentation tank is connected with first connecting pipe, the other end of first connecting pipe is connected with secondary sedimentation tank, the inside of secondary sedimentation tank is equipped with second filter screen, one end of secondary sedimentation tank is connected with second connecting pipe, one end of second connecting pipe is connected with purification treatment pond, both sides side plate of primary sedimentation tank, secondary sedimentation tank all are fixedly installed and are penetrated with baffle mechanism, the bottom of primary sedimentation tank, secondary sedimentation tank is equipped with sedimentation tank, one end of sedimentation tank is connected with blowdown mechanism, and the device is through the setting of baffle mechanism, and the dredging work of primary sedimentation tank and secondary sedimentation tank can be completed without stopping.

Description

Technical Field

[0001] This utility model belongs to the field of purification equipment technology, specifically relating to a sewage treatment and purification equipment with a multi-stage filtration structure. Background Technology

[0002] In wastewater treatment in industries, municipalities, and agriculture, multi-stage sedimentation and filtration is the core process for removing solid impurities of different particle sizes (such as silt and suspended particles) from wastewater. Existing wastewater treatment and purification equipment mostly achieves multi-stage filtration through a combination of "sedimentation tank + filter screen", laying the foundation for subsequent deep purification.

[0003] However, the existing equipment has obvious defects in practical applications: sludge removal requires shutdown. The existing sedimentation tank sludge removal relies on manual or semi-automatic sludge discharge. Manual cleaning requires emptying the tank water and interrupting the process. Semi-automatic sludge discharge also requires closing the inlet and outlet valves to prevent sewage from mixing in, which leads to the interruption of the sewage treatment process. It is especially unsuitable for continuous operation requirements. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a wastewater treatment and purification device with a multi-stage filtration structure, which can complete the sludge removal work of the primary sedimentation tank and the secondary sedimentation tank without stopping the machine.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sewage treatment and purification device with a multi-stage filtration structure, comprising a primary sedimentation tank, a sewage inlet pipe at one end of the primary sedimentation tank, a first filter screen inside the primary sedimentation tank, a first connecting pipe at the other end of the primary sedimentation tank, a secondary sedimentation tank at the other end of the first connecting pipe, a second filter screen inside the secondary sedimentation tank, a second connecting pipe at one end of the secondary sedimentation tank, and a purification treatment tank at one end of the second connecting pipe; baffle mechanisms are installed through and fixedly on both side plates of the primary and secondary sedimentation tanks; sedimentation tanks are provided at the bottom of the primary and secondary sedimentation tanks, a sewage discharge mechanism is connected at one end of the sedimentation tank; a second motor is provided at one end of both the primary and secondary sedimentation tanks, the output end of the second motor is connected to a spiral conveyor shaft rotatably installed inside the sedimentation tank; a reagent storage tank is provided on one side of the purification treatment tank; and a drainage control valve is provided at one end of the purification treatment tank.

[0006] The beneficial effects of this utility model are as follows: When it is necessary to clean the deposited sludge, the dual-head motor is controlled to drive the second rotating shaft and the pulley at the end of the second rotating shaft to rotate. Through the transmission between the pulley and the belt, each first rotating shaft along with the flaps rotates, so that each flap is flattened. The flaps, which are parallelogram-shaped in the side view, cooperate with each other. The flap at the very end is supported by a support rod to improve stability. The parts of the primary sedimentation tank and the secondary sedimentation tank located above and below the flaps are divided, so that the sewage in the primary sedimentation tank and the secondary sedimentation tank cannot enter the area below the flaps. After opening the sewage discharge valve, the second motor and the suction pump can be controlled to run. The second motor drives the screw conveyor shaft to rotate, and the sludge in the sedimentation tank is transported towards the sewage discharge pipe through the screw conveyor shaft. At the same time, the suction pump runs and sucks out the sludge sent into the sewage discharge pipe and discharges it. While automatically cleaning the sludge, the transportation and filtration of sewage in the primary sedimentation tank and the secondary sedimentation tank can be maintained simultaneously. The sediment in this stage can temporarily accumulate above the flaps, so the cleaning work of the primary sedimentation tank and the secondary sedimentation tank can be completed without stopping the machine.

[0007] To facilitate heat transfer from the power module:

[0008] As a further improvement to the above technical solution: the first filter screen is located above the sewage inlet pipe and below the connection between the primary sedimentation tank and the first connecting pipe, and the second filter screen is located above the connection between the secondary sedimentation tank and the first connecting pipe and below the connection between the secondary sedimentation tank and the second connecting pipe.

[0009] The beneficial effects of this improvement are as follows: Since the first filter screen is located above the sewage inlet pipe and below the connection between the primary sedimentation tank and the first connecting pipe, solid impurities in the sewage flowing into the primary sedimentation tank settle downwards due to gravity, while floating impurities with a particle size larger than the mesh size of the first filter screen that cannot settle in time can also be trapped below the first filter screen, reducing the amount of impurities entering the first connecting pipe. Similarly, since the second filter screen in the sewage inlet pipe is located above the connection between the secondary sedimentation tank and the first connecting pipe and below the connection between the secondary sedimentation tank and the second connecting pipe, the sewage that has undergone sedimentation and filtration in the primary sedimentation tank enters the sewage inlet pipe and is also trapped by the second filter screen to remove residual impurities.

[0010] To cool the second heat-conducting plate:

[0011] As a further improvement to the above technical solution: the baffle mechanism includes a flap mounting base, which is rotatably connected to a first rotating shaft. The first rotating shaft is fixedly connected to the flap. A motor mounting frame is connected between the primary sedimentation tank and the secondary sedimentation tank. A double-headed motor is provided on the top of the motor mounting frame. The output shafts at both ends of the double-headed motor are connected to a second rotating shaft. One end of the first rotating shaft and one end of the second rotating shaft on the flap mounting base of the two sets of baffle mechanisms that are close to each other are provided with pulleys. The second rotating shaft is connected to the closest first rotating shaft and the two adjacent sets of first rotating shafts are all driven by belts connected to pulleys.

[0012] The beneficial effects of this improvement are as follows: When it is necessary to clean the deposited sludge, the dual-head motor is controlled to drive the second rotating shaft and the pulley at the end of the second rotating shaft to rotate. Through the transmission between the pulley and the belt, each first rotating shaft along with the flaps rotates, so that each flap is flattened. The flaps, which are parallelogram-shaped in the side view, cooperate with each other. The flap at the very end is supported by a support rod to improve stability. The parts of the primary sedimentation tank and the secondary sedimentation tank located above and below the flaps are separated, so that the sewage in the primary sedimentation tank and the secondary sedimentation tank cannot enter the area below the flaps. Thus, this device can clean sludge without stopping the machine.

[0013] For air circulation and further sealing of the power module:

[0014] As a further improvement to the above technical solution: a support rod is connected between the two sets of flap mounting seats located in the same set of baffle mechanisms, and the side view shape of the flap is a parallelogram.

[0015] The beneficial effects of this improvement are as follows: the side view of the flap is a parallelogram shape, which can cooperate with each other when all are flat. The flap located at the rear can support the flap located at its front, and the support rod is used to support the rear end of the flap at the rearmost side, thereby reinforcing all flaps.

[0016] For the control of this device:

[0017] As a further improvement to the above technical solution: the sewage discharge mechanism includes a sewage discharge pipe connected to the primary sedimentation tank and the secondary sedimentation tank, one end of the sewage discharge pipe is connected to a sewage discharge valve, and one end of the sewage discharge valve is connected to a suction pump.

[0018] The beneficial effects of this improvement are: after opening the drain valve and the suction pump, the suction pump can suck out the sludge sent into the drain pipe and discharge it.

[0019] For the placement and charging of the charging gun:

[0020] As a further improvement to the above technical solution: a stirring motor mounting bracket is installed on the top of the purification treatment tank, and a stirring motor is provided on the top of the stirring motor mounting bracket. The output end of the stirring motor is connected to the stirring paddle.

[0021] The beneficial effects of this improvement are: by controlling the operation of the stirring motor, the stirring paddle can be driven to stir and fully mix the sewage and reagents in the purification treatment tank.

[0022] To transport cooling water:

[0023] As a further improvement to the above technical solution: a dosing pump is connected to the bottom of the drug storage tank, one end of the dosing pump is connected to a dosing pipe, and the dosing pipe is connected to the top of the purification treatment tank.

[0024] The beneficial effect of this improvement is that the agent in the agent storage tank can be pumped into the purification treatment tank through the injection pipe by the dosing pump.

[0025] In summary, the beneficial effects of this case are as follows:

[0026] When it is necessary to clean the deposited sludge, the dual-head motor is controlled to drive the second rotating shaft and the pulley at the end of the second rotating shaft to rotate. Through the transmission between the pulley and the belt, the first rotating shaft and the flaps are driven to rotate, so that the flaps are flattened. The flaps, which are parallelogram-shaped in the side view, cooperate with each other. The flap at the end is supported by a support rod to improve stability. The sections of the primary sedimentation tank and the secondary sedimentation tank located above and below the flaps are divided, so that the sewage in the primary sedimentation tank and the secondary sedimentation tank cannot enter the area below the flaps. After opening the sewage discharge valve, the second motor and the suction pump can be controlled to run. The second motor drives the screw conveyor shaft to rotate, and the sludge in the sedimentation tank is transported towards the sewage discharge pipe through the screw conveyor shaft. At the same time, the suction pump runs and sucks out the sludge sent into the sewage discharge pipe and discharges it. While automatically cleaning the sludge, the transportation and filtration of sewage in the primary sedimentation tank and the secondary sedimentation tank can be maintained simultaneously. The sediment in this stage can temporarily accumulate above the flaps, so the cleaning of the primary sedimentation tank and the secondary sedimentation tank can be completed without stopping the machine.

[0027] When this device is in use, wastewater is pumped into the primary sedimentation tank through a wastewater inlet pump. Since the first filter screen is located above the wastewater inlet pipe and below the connection between the primary sedimentation tank and the first connecting pipe, solid impurities in the wastewater flowing into the primary sedimentation tank settle downwards due to gravity. Floating impurities with a particle size larger than the mesh size of the first filter screen that do not settle in time are also trapped below the first filter screen, reducing the amount of impurities entering the first connecting pipe. Similarly, since the second filter screen in the wastewater inlet pipe is located above the connection between the secondary sedimentation tank and the first connecting pipe and below the connection between the secondary sedimentation tank and the second connecting pipe, the wastewater, after undergoing sedimentation and filtration in the primary sedimentation tank, enters the wastewater inlet pipe and again passes through the second filter screen to trap residual impurities. Through these two sedimentation and filtration processes, most impurities in the wastewater are retained in the primary and secondary sedimentation tanks, reducing the difficulty of subsequent wastewater treatment.

[0028] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0030] Figure 2 This is an isometric view of the rear side of this utility model;

[0031] Figure 3 This is a partial cross-sectional view of the present invention;

[0032] Figure 4 This is a cross-sectional schematic diagram of the primary sedimentation tank in this utility model (with the flaps erected).

[0033] Figure 5 This is a top view of the primary sedimentation tank and the secondary sedimentation tank in this utility model (the filter screen is not shown).

[0034] Figure 6 This is a cross-sectional schematic diagram of the primary sedimentation tank in this utility model;

[0035] In the diagram: 1. Primary sedimentation tank; 2. Wastewater inlet pipe; 3. First filter screen; 4. First connecting pipe; 5. Secondary sedimentation tank; 6. Second filter screen; 7. Second connecting pipe; 8. Purification treatment tank; 9. Flip plate mounting base; 10. First rotating shaft; 11. Flip plate; 12. Motor mounting bracket; 13. Dual-head motor; 14. Second rotating shaft; 15. Pulley; 16. Belt; 17. Support rod; 18. Sedimentation tank; 19. Sewage pipe; 20. Sewage valve; 21. Suction pump; 22. Second motor; 23. Screw conveyor shaft; 24. Agitator motor mounting bracket; 25. Agitator motor; 26. Agitator paddle; 27. Chemical storage tank; 28. Dosing pump; 29. ​​Injection pipe; 30. Drainage control valve. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0037] like Figure 1-6 As shown, a wastewater treatment and purification device with a multi-stage filtration structure includes a primary sedimentation tank 1, a wastewater inlet pipe 2 at one end of the primary sedimentation tank 1, a first filter screen 3 inside the primary sedimentation tank 1, a first connecting pipe 4 connected to the other end of the primary sedimentation tank 1, a secondary sedimentation tank 5 connected to the other end of the first connecting pipe 4, a second filter screen 6 inside the secondary sedimentation tank 5, a second connecting pipe 7 connected to one end of the secondary sedimentation tank 5, and a purification treatment tank 8 connected to one end of the second connecting pipe 7. Baffle mechanisms are installed through and fixedly on both side plates of the primary sedimentation tank 1 and the secondary sedimentation tank 5. A sedimentation tank 18 is provided at the bottom of the primary sedimentation tank 1 and the secondary sedimentation tank 5. A sewage discharge mechanism is connected to one end of the sedimentation tank 18. A second motor 22 is provided at one end of both the primary sedimentation tank 1 and the secondary sedimentation tank 5. The output end of the second motor 22 is connected to a spiral conveying shaft 23 rotatably installed inside the sedimentation tank 18. A chemical storage tank 27 is provided on one side of the purification treatment tank 8, and a drainage control valve 30 is provided at one end of the purification treatment tank 8.

[0038] When it is necessary to clean the deposited sludge, the dual-head motor 13 is controlled to operate, driving the second rotating shaft 14 and the pulley 15 at the end of the second rotating shaft 14 to rotate. Through the transmission between the pulley 15 and the belt 16, the first rotating shafts 10 and the flaps 11 are driven to rotate, so that the flaps 11 are flattened. The flaps 11, which are parallelogram-shaped in the side view, cooperate with each other. The flap at the very end 11 is supported by the support rod 17 to improve stability. This divides the parts of the primary sedimentation tank 1 and the secondary sedimentation tank 5 located above and below the flaps 11, preventing sewage from the primary sedimentation tank 1 and the secondary sedimentation tank 5 from entering the flaps 11. Below, after opening the sewage discharge valve 20, the second motor 22 and suction pump 21 can be controlled to run. The second motor 22 drives the screw conveyor shaft 23 to rotate, and the screw conveyor shaft 23 transports the sludge in the sedimentation tank 18 toward the sewage discharge pipe 19. At the same time, the suction pump 21 runs and sucks out the sludge sent into the sewage discharge pipe 19 and discharges it. While performing automatic sludge removal, the sewage can be transported and filtered in the primary sedimentation tank 1 and the secondary sedimentation tank 5 simultaneously. The sediment in this stage can temporarily accumulate above the flap 11, so the sludge removal work of the primary sedimentation tank 1 and the secondary sedimentation tank 5 can be completed without stopping the machine.

[0039] The first filter screen 3 is located above the sewage inlet pipe 2 and below the connection between the primary sedimentation tank 1 and the first connecting pipe 4. The second filter screen 6 is located above the connection between the secondary sedimentation tank 5 and the first connecting pipe 4 and below the connection between the secondary sedimentation tank 5 and the second connecting pipe 7.

[0040] Since the first filter screen 3 is located above the sewage inlet pipe 2 and below the connection between the primary sedimentation tank 1 and the first connecting pipe 4, solid impurities in the sewage flowing into the primary sedimentation tank 1 settle downwards due to gravity, while floating impurities with a particle size larger than the mesh size of the first filter screen 3 that do not have time to settle can also be trapped below the first filter screen 3, reducing the amount of impurities entering the first connecting pipe 4. Similarly, since the second filter screen 6 in the sewage inlet pipe 2 is located above the connection between the secondary sedimentation tank 5 and the first connecting pipe 4 and below the connection between the secondary sedimentation tank 5 and the second connecting pipe 7, the sewage that has undergone sedimentation and filtration in the primary sedimentation tank 1 enters the sewage inlet pipe 2 and is also trapped by the second filter screen 6.

[0041] The baffle mechanism includes a flap mounting base 9, which is rotatably connected to a first rotating shaft 10. The first rotating shaft 10 is fixedly connected to a flap 11. A motor mounting frame 12 connects the primary sedimentation tank 1 and the secondary sedimentation tank 5. A double-headed motor 13 is provided on the top of the motor mounting frame 12. Both output shafts of the double-headed motor 13 are connected to a second rotating shaft 14. One end of the first rotating shaft 10 and one end of the second rotating shaft 14 on the flap mounting base 9 of the two sets of baffle mechanisms that are close to each other are provided with pulleys 15. The second rotating shaft 14 and the closest first rotating shaft 10, as well as the two adjacent sets of first rotating shafts 10, are all connected to the pulleys 15 by belts 16 for transmission.

[0042] When it is necessary to clean the deposited sludge, the dual-head motor 13 is controlled to run, driving the second rotating shaft 14 and the pulley 15 at the end of the second rotating shaft 14 to rotate. Through the transmission between the pulley 15 and the belt 16, the first rotating shafts 10 and the flaps 11 are driven to rotate, so that the flaps 11 are flattened. The flaps 11, which are parallelogram-shaped in the side view, cooperate with each other. The flap at the end 11 is supported by the support rod 17 to improve stability. The parts of the primary sedimentation tank 1 and the secondary sedimentation tank 5 located above and below the flaps 11 are divided, so that the sewage in the primary sedimentation tank 1 and the secondary sedimentation tank 5 cannot enter the area below the flaps 11, thus enabling the device to clean sludge without stopping the machine.

[0043] A support rod 17 is connected between two sets of flap mounting seats 9 located in the same set of baffle mechanisms. The side view shape of the flap 11 is a parallelogram.

[0044] The side view of the flap 11 is a parallelogram shape. When all flaps are laid flat, they can cooperate with each other. The flap 11 located at the rear can support the flap 11 located at its front. The support rod 17 is used to support the rear end of the flap 11 at the rearmost side, thereby reinforcing all flaps 11.

[0045] The sewage discharge mechanism includes a sewage discharge pipe 19 that is connected to the primary sedimentation tank 1 and the secondary sedimentation tank 5. One end of the sewage discharge pipe 19 is connected to a sewage discharge valve 20, and one end of the sewage discharge valve 20 is connected to a suction pump 21.

[0046] After opening the drain valve 20 and the suction pump 21, the suction pump 21 can suck out the sludge sent into the drain pipe 19 and discharge it.

[0047] The top of the purification treatment tank 8 is equipped with a stirring motor mounting bracket 24, and the top of the stirring motor mounting bracket 24 is equipped with a stirring motor 25. The output end of the stirring motor 25 is connected to the stirring paddle 26.

[0048] By controlling the operation of the stirring motor 25, the stirring paddle 26 can be driven to stir and fully mix the sewage and reagents in the purification treatment tank 8.

[0049] The bottom of the drug storage tank 27 is connected to a dosing pump 28, one end of which is connected to a dosing pipe 29, which is connected to the top of the purification treatment tank 8.

[0050] The dosing pump 28 can pump the chemicals from the chemical storage tank 27 into the purification treatment tank 8 through the dosing pipe 29.

[0051] The working principle and usage process of this utility model are as follows: When using this device, wastewater is pumped into the primary sedimentation tank 1 through wastewater inlet pipe 2. Since the first filter screen 3 is located above the wastewater inlet pipe 2 and below the connection between the primary sedimentation tank 1 and the first connecting pipe 4, solid impurities in the wastewater flowing into the primary sedimentation tank 1 settle downwards due to gravity. Simultaneously, floating impurities with a particle size larger than the mesh size of the first filter screen 3 that cannot settle in time are also trapped below the first filter screen 3, reducing the amount of impurities entering the first connecting pipe 4. Similarly, since the second filter screen 6 in the wastewater inlet pipe 2 is located above the connection between the secondary sedimentation tank 5 and the first connecting pipe 4, and below the connection between the secondary sedimentation tank 5 and the second connecting pipe 7, after one... After sedimentation and filtration in the primary sedimentation tank 1, the wastewater enters the wastewater feed pipe 2 and passes through the second filter screen 6 to trap residual impurities. Through these two sedimentation and filtration processes, most impurities in the wastewater are retained in the primary sedimentation tank 1 and the secondary sedimentation tank 5, reducing the difficulty of subsequent wastewater treatment. The settled impurities accumulate in the sedimentation tanks 18 at the bottom of the primary and secondary sedimentation tanks 1 and 5. When it is necessary to clean the deposited sludge, the dual-head motor 13 is activated, driving the second rotating shaft 14 and the pulley 15 at the end of the second rotating shaft 14 to rotate. Through the transmission between the pulley 15 and the belt 16, the first rotating shafts 10, along with the flaps 11, rotate, causing the flaps 11 to be leveled. The flaps 11, which are parallelogram-shaped in the side view, cooperate with each other. The final flap 11, supported by the support rod 17, enhances stability and divides the primary sedimentation tank 1 and the secondary sedimentation tank 5 above and below the flap 11, preventing wastewater from entering below the flap 11. Opening the drain valve 20 controls the operation of the second motor 22 and the suction pump 21. The second motor 22 drives the screw conveyor shaft 23 to rotate, transporting the sludge in the sedimentation tank 18 towards the drain pipe 19. Simultaneously, the suction pump 21 sucks out the sludge sent into the drain pipe 19 and discharges it. While automatically cleaning the sludge, the system simultaneously maintains the transport and filtration of wastewater in the primary sedimentation tank 1 and the secondary sedimentation tank 5. The sediment in this stage can... The sediment temporarily accumulates above the flap 11, allowing the primary sedimentation tank 1 and secondary sedimentation tank 5 to be cleaned without stopping the machine. After cleaning, the drain valve 20 is closed again, and the suction pump 21 and the second motor 22 are stopped. The dual-head motor 13 is reversed, causing the flap 11 to rotate to a vertical position, allowing the sediment in the sewage to fall back into the sedimentation tank 18. The sewage that has been settled and filtered is then transported to the interior of the purification treatment tank 8 through the second connecting pipe 7. The chemical dosing pump 28 pumps the chemical from the chemical storage tank 27 into the purification treatment tank 8 through the dosing pipe 29. The stirring motor 25 drives the stirring paddle 26 to stir and fully mix the sewage and chemical in the purification treatment tank 8. After this process, the drain control valve 30 is opened.The purified wastewater is then discharged.

[0052] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this application does not involve any improvement to the software and methods.

[0053] It should be noted that, in this document, 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 process, method, article, or apparatus.

[0054] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A wastewater treatment and purification device with a multi-stage filtration structure, characterized in that: The system includes a primary sedimentation tank (1), one end of which is equipped with a sewage inlet pipe (2). The primary sedimentation tank (1) has a first filter screen (3) inside. The other end of the primary sedimentation tank (1) is connected to a first connecting pipe (4), and the other end of the first connecting pipe (4) is connected to a secondary sedimentation tank (5). The secondary sedimentation tank (5) has a second filter screen (6) inside. One end of the secondary sedimentation tank (5) is connected to a second connecting pipe (7), and one end of the second connecting pipe (7) is connected to a purification treatment tank (8). The primary sedimentation tank (1) and the secondary sedimentation tank... (5) Both sides of the side plate are connected and fixedly installed with baffle mechanism. The bottom of the primary sedimentation tank (1) and the secondary sedimentation tank (5) is provided with sedimentation tank (18). One end of the sedimentation tank (18) is connected to the sewage discharge mechanism. One end of the primary sedimentation tank (1) and the secondary sedimentation tank (5) is provided with a second motor (22). The output end of the second motor (22) is connected to the spiral conveying shaft (23) which is rotatably installed inside the sedimentation tank (18). One side of the purification treatment tank (8) is provided with a reagent storage tank (27). One end of the purification treatment tank (8) is provided with a drainage control valve (30).

2. The wastewater treatment and purification equipment with a multi-stage filtration structure according to claim 1, characterized in that: The first filter screen (3) is located above the sewage inlet pipe (2) and below the connection between the primary sedimentation tank (1) and the first connecting pipe (4). The second filter screen (6) is located above the connection between the secondary sedimentation tank (5) and the first connecting pipe (4) and below the connection between the secondary sedimentation tank (5) and the second connecting pipe (7).

3. The wastewater treatment and purification equipment with a multi-stage filtration structure according to claim 1, characterized in that: The baffle mechanism includes a flap mounting base (9), which is rotatably connected to a first rotating shaft (10). The first rotating shaft (10) is fixedly connected to a flap (11). A motor mounting frame (12) is connected between the primary sedimentation tank (1) and the secondary sedimentation tank (5). A double-headed motor (13) is provided on the top of the motor mounting frame (12). The output shafts at both ends of the double-headed motor (13) are connected to the second rotating shaft (14). One end of the first rotating shaft (10) and one end of the second rotating shaft (14) on the flap mounting base (9) of the two sets of baffle mechanisms that are close to each other are provided with pulleys (15). The second rotating shaft (14) and the closest first rotating shaft (10) and the two adjacent sets of first rotating shafts (10) are all connected to the pulleys (15) by belts (16) for transmission.

4. A wastewater treatment and purification device with a multi-stage filtration structure according to claim 3, characterized in that: A support rod (17) is connected between two sets of flap mounting seats (9) located in the same set of baffle mechanism. The side view shape of the flap (11) is a parallelogram.

5. A wastewater treatment and purification device with a multi-stage filtration structure according to claim 1, characterized in that: The sewage discharge mechanism includes a sewage discharge pipe (19) connected to the primary sedimentation tank (1) and the secondary sedimentation tank (5). One end of the sewage discharge pipe (19) is connected to a sewage discharge valve (20), and one end of the sewage discharge valve (20) is connected to a suction pump (21).

6. A wastewater treatment and purification device with a multi-stage filtration structure according to claim 1, characterized in that: The top of the purification treatment tank (8) is equipped with a stirring motor mounting bracket (24), and the top of the stirring motor mounting bracket (24) is equipped with a stirring motor (25). The output end of the stirring motor (25) is connected to the stirring paddle (26).

7. A wastewater treatment and purification device with a multi-stage filtration structure according to claim 1, characterized in that: The bottom of the drug storage tank (27) is connected to a dosing pump (28), one end of which is connected to a dosing pipe (29), which is connected to the top of the purification treatment tank (8).

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