Sewage treatment device

Abstract

The utility model relates to the technical field of sewage treatment, and provides a sewage treatment device which is characterized in that sewage is sequentially introduced into a grit chamber, an adjusting tank, an anaerobic tank, an aerobic tank, a sludge tank, a sedimentation tank, a disinfection tank and a clean water tank so as to realize the purification of the sewage. As the inclined plane and the deposition tank are sequentially distributed in the tank body along the flowing direction of the water flow, the cleaning frame is accommodated in the deposition tank in the sewage treatment process, when the water flow enters the regulating tank, sediments in the water flow are deposited on the inclined plane, and the sediments are separated from the cleaning frame under the guide of the inclined plane and the flowing effect of the water flow. And the sediments can be gathered in the cleaning frame in the deposition tank. When the interior of the adjusting tank needs to be cleaned, the cleaning frame can be driven to ascend in the height direction through the lifting assembly, so that the cleaning frame is lifted out of the tank body. Therefore, an operator does not need to enter the pre-exhaust regulating tank or the tank body, the convenience of cleaning the regulating tank is greatly improved, time and labor are saved, the cleaning operation is simplified, and the sewage treatment effect is favorably improved.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, and in particular relates to a wastewater treatment device. Background Technology

[0002] With rapid urban development and accelerating urbanization, the discharge of domestic sewage is constantly increasing. Simultaneously, the growing population and its increasing demand for food production are driving up the demand for agricultural irrigation water resources. Therefore, how to utilize domestic sewage in a resource-efficient manner and improve the irrigation efficiency of limited water resources is a key measure to promote the modernization of agriculture and rural areas in my country. Actively exploring resource-efficient utilization pathways for domestic sewage, and using advanced treatment technologies to transform it into water resources usable for agricultural irrigation, can not only reduce dependence on natural water resources but also improve water resource utilization efficiency, providing a strong guarantee for the sustainable development of agriculture in my country.

[0003] In wastewater treatment, wastewater is typically purified using specialized equipment. This involves processes such as grit removal, equalization, anaerobic digestion, aerobic digestion, sedimentation, and disinfection to effectively purify the wastewater. Equalization tanks, structures that regulate influent and effluent flow rates, primarily regulate water quantity and quality, as well as pH and temperature. After a period of treatment, a large amount of sediment accumulates in the equalization tank. To ensure its proper functioning, it needs regular cleaning, typically involving emptying the tank and then manually cleaning the bottom. However, this cleaning method is not only time-consuming and labor-intensive but also reduces wastewater treatment efficiency. Utility Model Content

[0004] Based on the above background, the purpose of this utility model is to provide a sewage treatment device that saves time and effort, simplifies cleaning operations, and at the same time, facilitates the improvement of sewage treatment efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A wastewater treatment device includes: a grit chamber, an equalization tank, an anaerobic tank, an aerobic tank, a sludge tank, a sedimentation tank, a disinfection tank, and a clear water tank connected in sequence; wherein, the equalization tank includes a tank body, a cleaning frame, and a lifting assembly; the bottom of the tank body includes an inclined surface and a sedimentation trough distributed sequentially along the water flow direction; the end of the inclined surface away from the sedimentation trough is higher than the end of the inclined surface near the sedimentation trough, and the end of the inclined surface near the sedimentation trough is higher than or flush with the opening of the sedimentation trough; the cleaning frame is housed in the sedimentation trough; and the lifting assembly is used to drive the cleaning frame to move up and down along the height direction of the tank body.

[0007] Furthermore, the regulating tank also includes a cover plate and a lifting assembly. An outlet is provided on an inner wall of the tank body near the sedimentation tank. The cover plate is rotatably connected to the cleaning frame and is used to cover the opening of the cleaning frame. A sealing plug is provided on a surface of the cover plate facing away from the cleaning frame. When the cleaning frame is housed in the sedimentation tank, the lifting assembly is used to drive the cover plate away from the cleaning frame and fit against the inner wall of the tank body, and the sealing plug is located in the outlet.

[0008] Furthermore, the lifting assembly includes a first driver and a first pull rope, one end of the first pull rope being connected to the cover plate and the other end being connected to the driving end of the first driver, the first driver being used to wind up the first pull rope.

[0009] Furthermore, the top of the pool body is provided with a first fixed pulley, the first pull rope is wound around the first fixed pulley and connected between the first driver and the cover plate.

[0010] Furthermore, the outlet includes a first hole section and a second hole section that are interconnected. The first hole section is closer to the interior of the pool body than the second hole section. The inner diameter of the first hole section is larger than the inner diameter of the second hole section. The sealing plug includes a first plug part and a second plug part disposed on the first plug part. The first plug part is disposed on the cover plate. The second plug part is inserted into the second hole section, and the first plug part is inserted into the first hole section.

[0011] Furthermore, the cleaning frame is provided with a first hook, and one end of the cover plate is provided with a second hook. When the cover plate is placed over the opening of the cleaning frame, the second hook is engaged with the first hook.

[0012] Furthermore, the inner wall of the pool body near the sedimentation tank is provided with a guide groove, the guide groove extends along the height direction of the pool body, and the cleaning frame is provided with a limiting block that cooperates with the guide groove.

[0013] Furthermore, the lifting assembly includes a second driver and a second pull rope. One end of the second pull rope is connected to the cleaning frame, and the other end is connected to the drive end of the second driver. The second driver is used to wind up the second pull rope.

[0014] Furthermore, a first buckle is provided on one wall of the sedimentation tank near the inclined surface, and a second buckle is provided on the cleaning frame to cooperate with the first buckle.

[0015] Furthermore, the bottom of the cleaning frame is provided with several spaced through holes.

[0016] This utility model has the following beneficial effects:

[0017] (1) In the wastewater treatment process, wastewater is sequentially fed into a grit chamber, equalization tank, anaerobic tank, aerobic tank, sludge tank, sedimentation tank, disinfection tank, and clear water tank to purify the wastewater. Since inclined surfaces and sedimentation troughs are sequentially distributed within the tanks along the water flow direction, the cleaning frame is housed within the sedimentation trough during wastewater treatment. When water flows into the equalization tank, sediment in the water is deposited on the inclined surfaces, and guided by the inclined surfaces and the water flow, the sediment collects within the cleaning frame in the sedimentation trough. When cleaning is required in the equalization tank, the cleaning frame can be lifted vertically using a lifting assembly, thus removing the cleaning frame from the tank. This eliminates the need for operators to enter the pre-emptied equalization tank or enter the tank itself, greatly improving the convenience of cleaning the equalization tank, saving time and effort, simplifying cleaning operations, and contributing to improved wastewater treatment efficiency.

[0018] (2) When the equalization tank is running normally, the cover plate is driven away from the cleaning frame by the lifting component. This not only makes it easier for the sediment in the equalization tank to collect in the cleaning frame, but also allows the opened cover plate to adhere to the inner wall of the tank, so that the seal is inserted into the outlet, thus stabilizing the water flow in the equalization tank. At the same time, when the cleaning frame is lifted, the cover plate can be used to close the opening of the cleaning frame, preventing the sediment in the cleaning frame from being mixed back into the equalization tank during the lifting process.

[0019] (3) The first pull rope is wound around the first drive and shortened so that the cover plate is rotated and opened from the cleaning frame, thereby realizing that the opening of the cleaning frame is stably opened.

[0020] (4) A guide groove is provided on the inner wall of the pool and the guide groove extends along the height direction. Therefore, during the lifting and lowering process, the cleaning frame can be moved smoothly along the height direction by the limit block and the guide groove, so that the cleaning in the adjustment pool is more convenient and stable. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the wastewater treatment device described in one embodiment;

[0023] Figure 2 This is a schematic diagram of the regulating pool after the cover is opened, as described in one embodiment;

[0024] Figure 3 for Figure 2Enlarged schematic diagram of the structure at point A in the middle circle;

[0025] Figure 4 This is a schematic diagram of the regulating pool after the cover plate is closed, as described in one embodiment;

[0026] Figure 5 This is a schematic diagram of the structure of the regulating pool after the cleaning frame is lifted, as described in one embodiment;

[0027] Figure 6 This is a top view of the regulating tank described in one embodiment.

[0028] Explanation of icon numbers:

[0029] 100. Wastewater treatment device; 10. Grit chamber; 11. Inlet; 12. Bar screen; 20. Equalization tank; 21. Tank body; 211. Inclined surface; 212. Sedimentation tank; 213. First buckle; 22. Guide channel; 23. Cleaning frame; 231. Second buckle; 232. First hook; 233. Limiting block; 234. Through hole; 24. Cover plate; 241. Second hook; 25. Outlet; 251. First hole section; 252. The... Two-hole section; 26. Sealing plug; 261. First plug section; 262. Second plug section; 27. Lifting assembly; 271. Second actuator; 272. Second pull rope; 273. Second fixed pulley; 28. Lifting assembly; 281. First actuator; 282. First pull rope; 283. First fixed pulley; 30. Anaerobic tank; 40. Aerobic tank; 50. Sludge tank; 60. Sedimentation tank; 70. Disinfection tank; 80. Clear water tank; 81. Drainage outlet.

[0030] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] 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.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0034] In one embodiment, please refer to Figures 1 to 6 This application provides a wastewater treatment device 100, which includes: a grit chamber 10, an equalization tank 20, an anaerobic tank 30, an aerobic tank 40, a sludge tank 50, a sedimentation tank 60, a disinfection tank 70, and a clear water tank 80 connected in sequence; wherein, the equalization tank 20 includes a tank body 21, a cleaning frame 23, and a lifting assembly 27, the bottom of the tank body 21 includes an inclined surface 211 and a sedimentation trough 212 distributed in sequence along the water flow direction, the end of the inclined surface 211 away from the sedimentation trough 212 is higher than the end of the inclined surface 211 near the sedimentation trough 212, and the end of the inclined surface 211 near the sedimentation trough 212 is higher than or level with the opening of the sedimentation trough 212, the cleaning frame 23 is housed in the sedimentation trough 212, and the lifting assembly 27 is used to drive the cleaning frame 23 to move up and down along the height direction of the tank body 21.

[0035] The aforementioned wastewater treatment device 100, during the wastewater treatment process, sequentially feeds wastewater into a grit chamber 10, an equalization tank 20, an anaerobic tank 30, an aerobic tank 40, a sludge tank 50, a sedimentation tank 60, a disinfection tank 70, and a clear water tank 80 to purify the wastewater. Since inclined surfaces 211 and sedimentation troughs 212 are sequentially distributed along the water flow direction within the tank body 21, during wastewater treatment, the cleaning frame 23 is housed within the sedimentation trough 212. When water flows into the equalization tank 20, sediment in the water is deposited on the inclined surfaces 211, and under the guidance of the inclined surfaces 211 and the action of the water flow, the sediment accumulates in the cleaning frame 23 within the sedimentation trough 212. When cleaning is required in the equalization tank 20, the cleaning frame 23 can be lifted vertically using the lifting assembly 27, thus removing the cleaning frame 23 from the tank body 21. This eliminates the need for operators to enter the pre-emptied equalization tank 20 or the tank body 21, greatly improving the convenience of cleaning the equalization tank 20, saving time and effort, simplifying cleaning operations, and helping to improve the sewage treatment effect.

[0036] It should be explained that in the wastewater treatment process, wastewater sequentially passes through a grit chamber 10, an equalization tank 20, an anaerobic tank 30, an aerobic tank 40, a sludge tank 50, a sedimentation tank 60, a disinfection tank 70, and a clear water tank 80. The grit chamber 10 removes inorganic sand particles. The equalization tank 20 balances water quality and quantity, regulating water volume and quality, as well as the pH and temperature of the wastewater. The anaerobic tank 30 performs anaerobic treatment, and the aerobic tank 40 uses a membrane bioreactor (MBR) for treatment; the aerobic tank 40 includes a membrane bioreactor and its internal aeration device. The sedimentation tank 60 separates sludge; it includes a sludge return pump station and a sludge dewatering device to allow sludge to return to the anaerobic tank 30 and for dewatering. The disinfection tank 70 sterilizes the wastewater; it includes a chlorine dioxide disinfection device. The clear water tank 80 stores treated water that meets standards, and the sludge tank 50 treats excess sludge. In addition, an inlet 11 and a screen 12 can be installed on the sedimentation tank 10 to intercept large suspended solids such as tree branches and plastic bags. An outlet 81 can be installed on the clear water tank 80.

[0037] It should also be explained that the inclined surface 211 and the sedimentation tank 212 are distributed sequentially along the direction of water flow. This means that when water enters the regulating tank 20, it flows towards the sedimentation tank 212, causing sediment deposited at the bottom to be carried by the water flow and collected in the cleaning frame 23 within the sedimentation tank 212. Simultaneously, the end of the inclined surface 211 furthest from the sedimentation tank 212 is higher than the other end. Therefore, even sediment deposited on the inclined surface 211 will slide down into the cleaning frame 23 within the sedimentation tank 212 under its own weight, achieving self-cleaning.

[0038] In addition, the lifting assembly 27 can be a device that drives the cleaning frame 23 to lift or lower, such as, but not limited to, a cylinder, a hydraulic cylinder, or a combination structure of a motor and a gear and rack, or a combination structure of a motor and a lead screw mechanism.

[0039] Further, please refer to Figure 3 and Figure 4The regulating tank 20 also includes a cover plate 24 and a lifting assembly 28. An outlet 25 is provided on an inner wall of the tank body 21 near the sedimentation tank 212. The cover plate 24 is rotatably connected to the cleaning frame 23 and is used to cover the opening of the cleaning frame 23. A sealing plug 26 is provided on a surface of the cover plate 24 facing away from the cleaning frame 23. When the cleaning frame 23 is housed in the sedimentation tank 212, the lifting assembly 28 is used to drive the cover plate 24 away from the cleaning frame 23 and fit it against the inner wall of the tank body 21, and the sealing plug 26 is located in the outlet 25. It can be seen that when the equalization tank 20 is operating normally, the lifting component 28 drives the cover plate 24 to move away from the cleaning frame 23. This not only facilitates the collection of sediment in the equalization tank 20 into the cleaning frame 23, but also allows the opened cover plate 24 to adhere to the inner wall of the tank body 21, so that the sealing plug 26 can be inserted into the outlet 25, thereby stabilizing the water flow in the equalization tank 20. At the same time, when the cleaning frame 23 is lifted, the cover plate 24 can be used to close the opening of the cleaning frame 23, preventing the sediment in the cleaning frame 23 from being mixed back into the equalization tank 20 during the lifting process.

[0040] It should be explained that the lifting assembly 28 refers to the device that drives the cover 24 to rotate on the cleaning frame 23. When the cover 24 rotates away from the opening of the cleaning frame 23, the cleaning frame 23 is opened, allowing sediment to enter. When the cover 24 rotates to cover the opening of the cleaning frame 23, the cleaning frame 23 is closed, preventing sediment from re-entering the pool body 21 from the cleaning frame 23 when it rises. The lifting assembly 28 can have various structural designs; for example, it can be, but is not limited to, a motor, or a combination of a motor and a pull rope.

[0041] In one embodiment, please refer to Figure 2 and Figure 6 The lifting assembly 28 includes a first driver 281 and a first pull rope 282. One end of the first pull rope 282 is connected to the cover plate 24, and the other end is connected to the drive end of the first driver 281. The first driver 281 is used to wind up the first pull rope 282. It can be seen that by winding the first pull rope 282 with the first driver 281, the first pull rope 282 is shortened, causing the cover plate 24 to rotate and open from the cleaning frame 23, thereby achieving a stable opening of the cleaning frame 23. The first driver 281 is a motor.

[0042] Furthermore, a first fixed pulley 283 is provided at the top of the pool body 21, and a first pull rope 282 is wound around the first fixed pulley 283 and connected between the first driver 281 and the cover plate 24. In this way, the first fixed pulley 283 makes the stretching of the first pull rope 282 more stable; at the same time, it also reduces the wear of the first stretching.

[0043] In one embodiment, the outlet 25 includes a first orifice 251 and a second orifice 252 that are interconnected. The first orifice 251 is closer to the interior of the tank body 21 than the second orifice 252. The inner diameter of the first orifice 251 is larger than the inner diameter of the second orifice 252. The sealing plug 26 includes a first plug portion 261 and a second plug portion 262 disposed on the first plug portion 261. The first plug portion 261 is disposed on the cover plate 24. The second plug portion 262 is inserted into the second orifice 252, and the first plug portion 261 is inserted into the first orifice 251. It can be seen that the first plug portion 261 cooperates with the first orifice 251, and the second plug portion 262 cooperates with the second orifice 252 to achieve a double-layer seal and improve the sealing performance of the regulating tank 20.

[0044] The first plug part 261 and the second plug part 262 are an integrated structure.

[0045] In one embodiment, please refer to Figure 3 The cleaning frame 23 is provided with a first hook 232, and one end of the cover plate 24 is provided with a second hook 241. When the cover plate 24 is placed over the opening of the cleaning frame 23, the second hook 241 overlaps the first hook 232. It can be seen that the first hook 232 and the second hook 241 cooperate to make the cover plate 24 stably overlap the cleaning frame 23, ensuring that the cover plate 24 is stably covered on the cleaning frame 23.

[0046] The first hook 232 and the second hook 241 can be designed in various shapes, such as L-shaped or semi-circular.

[0047] In one embodiment, please refer to Figure 2 and Figure 6 The inner wall of the pool body 21 near the sedimentation tank 212 is provided with a guide channel 22, which extends along the height direction of the pool body 21. The cleaning frame 23 is provided with a limiting block 233 that cooperates with the guide channel 22. It can be seen that the guide channel 22 is provided on the inner wall of the pool body 21 and extends along the height direction. Therefore, during the lifting and lowering process, the cleaning frame 23 can move smoothly along the height direction through the cooperation of the limiting block 233 and the guide channel 22, thereby making the cleaning in the regulating pool 20 more convenient and stable.

[0048] It should be explained that there can be multiple guide channels 22. For example, there can be two guide channels 22, which are placed side by side and spaced apart. At the same time, the two guide channels 22 are located on opposite sides of the outlet 25.

[0049] In one embodiment, please refer to Figure 6The lifting assembly 27 includes a second driver 271 and a second pull rope 272. One end of the second pull rope 272 is connected to the cleaning frame 23, and the other end is connected to the drive end of the second driver 271. The second driver 271 is used to wind up the second pull rope 272. It can be seen that by winding the second pull rope 272 with the second driver 271, the second pull rope 272 is shortened, and the cleaning frame 23 is raised, which facilitates rapid cleaning.

[0050] The second actuator 271 is a motor. Additionally, a second fixed pulley 273 is provided at the top of the pool body 21, and a second pull rope 272 is wound around the second fixed pulley 273 and connected between the second actuator 271 and the cleaning frame 23. Thus, the second fixed pulley 273 ensures smoother tensioning of the second pull rope 272, while also reducing wear and tear on the second pull.

[0051] In one embodiment, a first buckle 213 is provided on a wall of the sedimentation tank 212 near the inclined surface 211, and a second buckle 231 is provided on the cleaning frame 23 to cooperate with the first buckle 213, so that the cleaning frame 23 can be quickly fixed in the sedimentation tank 212.

[0052] The first buckle 213 and the second buckle 231 can be designed in various shapes, such as L-shaped or semi-circular.

[0053] In one embodiment, please refer to Figure 3 The bottom of the cleaning frame 23 is provided with several spaced through holes 234. It can be seen that when the cleaning frame 23 is lifted, the water inside the cleaning frame 23 can leak out through each through hole 234.

[0054] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A wastewater treatment device, characterized in that, The wastewater treatment device includes: a grit chamber (10), an equalization tank (20), an anaerobic tank (30), an aerobic tank (40), a sludge tank (50), a sedimentation tank (60), a disinfection tank (70), and a clear water tank (80) connected in sequence. The regulating pool (20) includes a pool body (21), a cleaning frame (23), and a lifting assembly (27). The bottom of the pool body (21) includes an inclined surface (211) and a sedimentation tank (212) distributed sequentially along the water flow direction. The end of the inclined surface (211) away from the sedimentation tank (212) is higher than the end of the inclined surface (211) close to the sedimentation tank (212), and the end of the inclined surface (211) close to the sedimentation tank (212) is higher than or level with the opening of the sedimentation tank (212). The cleaning frame (23) is housed in the sedimentation tank (212). The lifting assembly (27) is used to drive the cleaning frame (23) to move up and down along the height direction of the pool body (21).

2. The wastewater treatment device according to claim 1, characterized in that, The regulating tank (20) also includes a cover plate (24) and a lifting assembly (28). The tank body (21) has an outlet (25) on an inner wall near the sedimentation tank (212). The cover plate (24) is rotatably connected to the cleaning frame (23) and is used to cover the opening of the cleaning frame (23). A sealing plug (26) is provided on a surface of the cover plate (24) facing away from the cleaning frame (23). When the cleaning frame (23) is housed in the sedimentation tank (212), the lifting assembly (28) is used to drive the cover plate (24) away from the cleaning frame (23) and fit against the inner wall of the tank body (21). The sealing plug (26) is located in the outlet (25).

3. The wastewater treatment device according to claim 2, characterized in that, The lifting assembly (28) includes a first driver (281) and a first pull rope (282). One end of the first pull rope (282) is connected to the cover plate (24), and the other end is connected to the drive end of the first driver (281). The first driver (281) is used to wind up the first pull rope (282).

4. A wastewater treatment device according to claim 3, characterized in that, The top of the pool body (21) is provided with a first fixed pulley (283), the first pull rope (282) is wound around the first fixed pulley (283) and connected between the first driver (281) and the cover plate (24).

5. A wastewater treatment device according to claim 2, characterized in that, The outlet (25) includes a first hole section (251) and a second hole section (252) that are interconnected. The first hole section (251) is closer to the interior of the pool body (21) than the second hole section (252). The inner diameter of the first hole section (251) is larger than the inner diameter of the second hole section (252). The sealing plug (26) includes a first plug part (261) and a second plug part (262) disposed on the first plug part (261). The first plug part (261) is disposed on the cover plate (24). The second plug part (262) is inserted into the second hole section (252), and the first plug part (261) is inserted into the first hole section (251).

6. A wastewater treatment device according to claim 2, characterized in that, The cleaning frame (23) is provided with a first hook (232), and one end of the cover plate (24) is provided with a second hook (241). When the cover plate (24) covers the opening of the cleaning frame (23), the second hook (241) overlaps the first hook (232).

7. A wastewater treatment device according to claim 2, characterized in that, The pool body (21) has a guide groove (22) on its inner wall near the sedimentation tank (212). The guide groove (22) extends along the height direction of the pool body (21). The cleaning frame (23) has a limiting block (233) that cooperates with the guide groove (22).

8. A wastewater treatment device according to any one of claims 1-7, characterized in that, The lifting assembly (27) includes a second driver (271) and a second pull rope (272). One end of the second pull rope (272) is connected to the cleaning frame (23), and the other end is connected to the drive end of the second driver (271). The second driver (271) is used to wind up the second pull rope (272).

9. A wastewater treatment device according to any one of claims 1-7, characterized in that, The sedimentation tank (212) has a first buckle (213) on one of its walls near the inclined surface (211), and the cleaning frame (23) has a second buckle (231) that cooperates with the first buckle (213).

10. A wastewater treatment apparatus according to any one of claims 1-7, characterized in that, The bottom of the cleaning frame (23) is provided with several spaced through holes (234).

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