Solid-liquid separation device for wastewater treatment

Abstract

The utility model discloses a solid -liquid separation device for wastewater treatment relates to sewage treatment technical field. The solid -liquid separation device for wastewater treatment, including frame, the frame front fixedly connected with the raw wastewater feed inlet, the frame is fixedly connected with second rotating shaft, the second rotating shaft is fixedly connected with the belt conveyor of hole. The solid -liquid separation device for wastewater treatment, through the belt conveyor of hole and the crushing conveyor belt are set up and form the gradual change formula extrusion space of angle, compared with traditional plane extrusion structure, can carry out the extrusion effect of gradually enhancing to wastewater, the solid -liquid separation efficiency is improved significantly, especially applicable to high concentration solid -containing wastewater treatment, adopts the transmission structure of first pulley, second pulley and double -motor cooperation, ensures that the belt conveyor of hole and the crushing conveyor belt synchronous operation, avoided the extrusion uneven problem of traditional transmission mode because of the inharmonious of rotating speed, improved equipment operation stability.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a solid-liquid separation device for wastewater treatment. Background Technology

[0002] Existing solid-liquid separation devices for wastewater treatment have many shortcomings. Some devices use a planar extrusion structure to separate solids and liquids from wastewater. The extrusion force is uniform but cannot achieve a gradually increasing extrusion effect. For high-concentration solid wastewater, it is difficult to fully extrude the water from the solids, resulting in low solid-liquid separation efficiency. An unreasonable transmission system design can lead to inconsistent conveyor belt speeds, resulting in uneven compression, affecting equipment stability, and increasing the probability of malfunctions. Furthermore, the lack of effective guidance and isolation structures in the solid-liquid collection stage allows for secondary mixing of solids and liquids, causing cross-contamination and reducing separation purity. Screens or screen cylinders used for secondary filtration are prone to clogging due to the accumulation of impurities. Moreover, most filter components are cumbersome to disassemble, and cleaning and maintenance are time-consuming and labor-intensive, affecting the continuous operation time of the equipment. At the same time, many devices only have a single separation function and need to be used in conjunction with other filtration equipment to complete a more thorough treatment. The equipment has low integration, large footprint, and high system integration cost. Utility Model Content

[0003] The purpose of this invention is to solve at least one of the technical problems existing in the prior art, and to provide a solid-liquid separation device for wastewater treatment that can solve the above-mentioned problem.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a solid-liquid separation device for wastewater treatment, comprising a frame, a raw wastewater inlet fixedly connected to the front end of the frame, a second rotating shaft fixedly connected to the frame, a perforated conveyor belt fixedly connected to the second rotating shaft, a first rotating shaft fixedly connected to the frame above the perforated conveyor belt, a compaction conveyor belt fixedly connected to the first rotating shaft, and the perforated conveyor belt and the compaction conveyor belt forming a certain angle; One end of the first rotating shaft is fixedly connected to a first pulley, a belt is fixedly connected to the first pulley, the other end of the belt is fixedly connected to a second pulley, one end of the second pulley is fixedly connected to a second rotating shaft, and the other end is fixedly connected to a second motor; A guide plate is fixedly connected to the bottom of the perforated conveyor belt at the tail of the frame, and a solid collection box is provided below the guide plate. A wastewater baffle is fixedly connected to the bottom of the frame, and a wastewater collection tank is installed below the wastewater baffle. A wastewater pipe is fixedly connected to the wastewater collection tank, a water pump is fixedly connected to the wastewater pipe, a wastewater inlet is fixedly connected to the other end of the wastewater pipe, a treatment tank is fixedly connected to the wastewater inlet, a tank cover is fixedly connected to the top of the treatment tank, a first motor is fixedly connected to the tank cover, a rotating shaft is fixedly connected to the output end of the first motor, and a cleaning brush is fixedly connected to the rotating shaft. A support is fixedly connected to the bottom of the processing tank; A fine sieve cylinder is fixedly connected inside the processing tank, and a handle is fixedly connected to the fine sieve cylinder. A water outlet pipe is fixedly connected to the bottom of the treatment tank, and a ball valve is fixedly connected to the water outlet pipe.

[0005] Preferably, the angle between the perforated conveyor belt and the compaction conveyor belt is an acute angle.

[0006] Preferably, the guide plate is inclined, with its high end located below the end of the perforated conveyor belt and its low end extending to the upper opening of the solid collection box.

[0007] Preferably, the wastewater baffle is an inclined plate structure, with its receiving surface covering the area below the perforated conveyor belt and guiding the wastewater to the wastewater collection tank.

[0008] Preferably, the aperture of the fine screen cylinder is smaller than the aperture of the perforated conveyor belt.

[0009] Preferably, the bristles of the cleaning brush are in contact with the inner wall of the fine sieve cylinder.

[0010] Preferably, both the first motor and the second motor are servo motors, and their speeds can be adjusted by an external controller.

[0011] Preferably, the ball valve is a manual ball valve, and its nominal diameter matches the diameter of the outlet pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are: (1) The solid-liquid separation device for wastewater treatment forms a gradually increasing extrusion space by setting the perforated conveyor belt and the rolling conveyor belt at an angle. Compared with the traditional planar extrusion structure, it can gradually increase the extrusion effect on the wastewater, significantly improving the solid-liquid separation efficiency. It is especially suitable for the treatment of high-concentration solid wastewater. The transmission structure of the first pulley, the second pulley and the dual motors is adopted to ensure that the perforated conveyor belt and the rolling conveyor belt operate synchronously, avoiding the problem of uneven extrusion caused by inconsistent speed in the traditional transmission method, and improving the stability of equipment operation.

[0013] (2) The solid-liquid separation device for wastewater treatment accurately guides the solids into the solid collection box through the guide plate, and the liquid is collected into the wastewater collection box through the wastewater baffle. After solid-liquid separation, they are collected separately, which effectively avoids secondary mixing and pollution and solves the problem of easy cross-contamination of solid-liquid collection in the existing device.

[0014] (3) The solid-liquid separation device for wastewater treatment has a fine screen cylinder and a cleaning brush in the treatment tank. While performing secondary filtration, the cleaning brush cleans the screen holes in real time to prevent clogging. Compared with the traditional device that only has a screen, it extends the continuous operation time and reduces the frequency of shutdown for cleaning. The fine screen cylinder is equipped with a handle for quick disassembly and cleaning, which reduces the maintenance difficulty and solves the problem of cumbersome and time-consuming disassembly of existing filter components, thus improving the convenience of equipment maintenance. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of a solid-liquid separation device for wastewater treatment according to the present invention; Figure 2 This is a schematic diagram of a solid-liquid separation device for wastewater treatment according to the present invention; Figure 3 This is a schematic diagram of the pressing module of a solid-liquid separation device for wastewater treatment according to this utility model; Figure 4 This is a cross-sectional schematic diagram of the fine screening device of a solid-liquid separation device for wastewater treatment according to this utility model.

[0016] Reference numerals: 1. Support frame; 2. Processing tank; 3. Tank cover; 4. First motor; 5. Wastewater inlet; 6. Wastewater pipe; 7. Water pump; 8. Wastewater collection tank; 9. Wastewater baffle; 10. Frame; 11. Raw wastewater inlet; 12. Perforated conveyor belt; 13. Compactor conveyor belt; 14. First pulley; 15. Belt; 16. Second pulley; 17. Second motor; 18. Guide plate; 19. Solid collection tank; 20. Fine screen cylinder; 21. Handle; 22. Cleaning brush; 23. Rotating shaft; 24. Ball valve; 25. Water outlet pipe; 26. First rotating shaft; 27. Second rotating shaft. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0020] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0021] Please see Figure 1-4 This utility model provides a technical solution: a solid-liquid separation device for wastewater treatment, including a frame 10, a raw wastewater inlet 11 fixedly connected to the front end of the frame 10, a second rotating shaft 27 fixedly connected to the frame 10, a perforated conveyor belt 12 fixedly connected to the second rotating shaft 27, a first rotating shaft 26 fixedly connected to the frame 10 above the perforated conveyor belt 12, and a crushing conveyor belt 13 fixedly connected to the first rotating shaft 26. The raw wastewater enters the device through the raw wastewater inlet 11 fixedly connected to the front end of the frame 10 and falls onto the perforated conveyor belt 12 fixedly connected to the frame 10 via the second rotating shaft 27. The first rotating shaft 26 is fixedly connected to the frame 10 above the perforated conveyor belt 12, and the crushing conveyor belt 13 is fixedly connected to the first rotating shaft 26. The perforated conveyor belt 12 and the crushing conveyor belt 13 form a certain angle between them, creating a gradually changing extrusion space. One end of the first rotating shaft 26 is fixedly connected to a first pulley 14, and a belt 15 is fixedly connected to the first pulley 14. The other end of the belt 15 is fixedly connected to a second pulley 16. One end of the second pulley 16 is fixedly connected to a second rotating shaft 27, and the other end is fixedly connected to a second motor 17. When the second motor 17 starts, it sequentially drives the second pulley 16, which in turn drives the first pulley 14 to rotate via the belt 15. This, in turn, drives the first rotating shaft 26 and the second rotating shaft 27 to rotate, causing the compaction conveyor belt 13 and the perforated conveyor belt 12, which are set at an angle, to operate synchronously. After the wastewater enters the angled area between the two conveyor belts, it is gradually squeezed as the conveyor belts rotate. Under pressure, the liquid part seeps downward through the holes of the perforated conveyor belt 12. The angled structure can enhance the compaction effect and improve the solid-liquid separation efficiency. A guide plate 18 is fixedly connected to the lower part of the perforated conveyor belt 12 at the tail of the frame 10. A solid collection box 19 is set below the guide plate 18. A wastewater baffle 9 is fixedly connected to the lower part of the frame 10. A wastewater collection box 8 is set below the wastewater baffle 9. The leaked liquid is blocked by the wastewater baffle 9 fixedly connected to the lower part of the frame 10 and guided to the wastewater collection box 8 set below it. The solids remaining after crushing are transported to the tail of the frame 10 along the perforated conveyor belt 12 and fall into the solid collection box 19 set below it through the guide plate 18 fixedly connected to the lower part of the perforated conveyor belt 12. Wastewater collection tank 8 is fixedly connected to a wastewater pipe 6, a water pump 7 is fixedly connected to the wastewater pipe 6, and a wastewater inlet 5 is fixedly connected to the other end of the wastewater pipe 6. A treatment tank 2 is fixedly connected to the wastewater inlet 5, a tank cover 3 is fixedly connected to the top of the treatment tank 2, a first motor 4 is fixedly connected to the tank cover 3, a rotating shaft 23 is fixedly connected to the output end of the first motor 4, and a cleaning brush 22 is fixedly connected to the rotating shaft 23. The wastewater collected in the wastewater collection tank 8 is transported to the wastewater inlet 5 fixedly connected to the other end of the wastewater pipe 6 by the water pump 7 fixedly connected to the pipe, and then enters the treatment tank 2 fixedly connected to the wastewater inlet 5. After the first motor 4 fixedly connected to the tank cover 3 is started, the rotating shaft 23 fixedly connected to its output end rotates, driving the cleaning brush 22 fixedly connected to the rotating shaft 23 to rotate. The fine screen cylinder 20 fixedly connected inside the treatment tank 2 filters the incoming wastewater again, and the cleaning brush 22 cleans the fine screen cylinder 20 to prevent blockage. A bracket 1 is fixedly connected to the bottom of the processing tank 2, and the bracket 1 provides support and fixation. A fine sieve cylinder 20 is fixedly connected inside the processing tank 2. A handle 21 is fixedly connected to the fine sieve cylinder 20. The handle 21 fixedly connected to the fine sieve cylinder 20 is easy to disassemble and clean. A water outlet pipe 25 is fixedly connected to the bottom of the treatment tank 2, and a ball valve 24 is fixedly connected to the water outlet pipe 25. Wastewater is collected at the bottom of the treatment tank 2 and discharged through the water outlet pipe 25 fixedly connected to the bottom of the treatment tank 2. The ball valve 24 fixedly connected to the water outlet pipe 25 can control the opening and closing of the drainage.

[0022] Working principle: Raw wastewater enters the device through the raw wastewater inlet 11 fixedly connected to the front end of the frame 10, and falls onto the perforated conveyor belt 12 fixedly connected to the frame 10 via the second rotating shaft 27. A first rotating shaft 26 is fixedly connected above the perforated conveyor belt 12 on the frame 10, and a rolling conveyor belt 13 is fixedly connected to the first rotating shaft 26. The perforated conveyor belt 12 and the rolling conveyor belt 13 form a certain angle, creating a gradually changing extrusion space. The first pulley 14 is fixedly connected to one end of the first rotating shaft 26, and its other end is fixedly connected to the second pulley 16. One end of the second pulley 16 is fixedly connected to the second rotating shaft 27, and the other end is fixedly connected to the second motor 17. When the second motor 17 starts, it sequentially drives the second pulley 16, and the second pulley 16 drives the first pulley 14 to rotate through the belt 15, thereby driving the first rotating shaft 26 and the second rotating shaft 27 to rotate, so that the crushing conveyor belt 13 and the perforated conveyor belt 12, which are set at an angle, operate synchronously. After the wastewater enters the angled area between the two conveyor belts, it is gradually squeezed as the conveyor belts rotate. Under the pressure, the liquid part seeps downward through the holes of the perforated conveyor belt 12. The angled structure can enhance the crushing effect and improve the solid-liquid separation efficiency. The leaked liquid is blocked by the wastewater baffle 9 fixedly connected below the frame 10 and guided to the wastewater collection tank 8 set below it. The solid residue after crushing is transported to the tail of the frame 10 along the perforated conveyor belt 12 and falls into the solid collection tank 19 set below it through the guide plate 18 fixedly connected below the perforated conveyor belt 12. Wastewater collected in wastewater collection tank 8 is transported to wastewater inlet 5, which is fixedly connected to the wastewater pipe 6, through the action of water pump 7, which is fixedly connected to the pipe. Then, it enters treatment tank 2, which is fixedly connected to wastewater inlet 5. A tank cover 3 is fixedly connected to the top of treatment tank 2. After the first motor 4, which is fixedly connected to the tank cover 3, is started, the rotating shaft 23, which is fixedly connected to its output end, rotates, driving the cleaning brush 22, which is fixedly connected to the rotating shaft 23, to rotate. The fine screen cylinder 20, which is fixedly connected inside treatment tank 2, filters the incoming wastewater again. The cleaning brush 22 cleans the fine screen cylinder 20 to prevent blockage. The handle 21 fixedly connected to the fine screen cylinder 20 is easy to disassemble and clean. The wastewater filtered by the fine screen cylinder 20 is collected at the bottom of the treatment tank 2 and discharged through the outlet pipe 25 fixedly connected to the bottom of the treatment tank 2. The ball valve 24 fixedly connected to the outlet pipe 25 can control the opening and closing of the drainage. The treatment tank 2 is supported and fixed by the bracket 1 fixedly connected below it. Structural Description: Support 1: Support 1 is fixedly connected to the bottom of treatment tank 2 to support treatment tank 2, raise the tank to a suitable height, facilitate the connection of water outlet pipe 25 and wastewater discharge, avoid corrosion or temperature effects caused by treatment tank 2 directly contacting the ground, and improve the service life of the equipment.

[0023] Treatment tank 2: Treatment tank 2 is fixedly connected to the bracket 1, with the tank cover 3 connected to the top, the wastewater inlet 5 connected to the side, and the water outlet pipe 25 connected to the bottom. The fine screen cylinder 20 is fixed inside, serving as the core container for secondary filtration of wastewater. It provides a closed space for the fine screen cylinder 20 and the cleaning brush 22. The tank structure can withstand a certain pressure to ensure the stability of the filtration process. At the same time, it integrates the inlet and outlet water paths to form a complete treatment process.

[0024] Tank lid 3: The tank lid 3 is fixedly connected to the top of the treatment tank 2 and the first motor 4 is fixedly connected to it. It is used to seal the top of the treatment tank 2 to prevent external impurities from entering and polluting the wastewater. At the same time, it provides a mounting carrier for the first motor 4 so that the rotating shaft 23 can be precisely aligned with the fine screen cylinder 20 to ensure the cleaning effect of the cleaning brush 22.

[0025] First motor 4: The first motor 4 is fixedly connected to the can lid 3, and its output end is connected to the rotating shaft 23 to provide rotational power for the sweeping brush 22. The sweeping intensity can be controlled by adjusting the speed to adapt to the degree of clogging of the fine screen cylinder 20. The motor is centered to ensure that the rotating shaft 23 is evenly stressed and to reduce shaking.

[0026] Wastewater inlet 5: One end of wastewater inlet 5 is connected to wastewater pipe 6, and the other end is fixedly connected to treatment tank 2. It is used to guide wastewater into the fine screen cylinder 20 inside the treatment tank 2. The inlet direction is directly opposite the opening of the fine screen cylinder 20, which can reduce splashing caused by wastewater impacting the tank wall and ensure that all wastewater enters the filtration area.

[0027] Wastewater pipe 6: One end of wastewater pipe 6 is fixedly connected to wastewater collection tank 8, and the other end is connected to wastewater inlet 5. A water pump 7 is connected in series in the middle to transport the pre-separated wastewater to treatment tank 2. The sealed pipeline design can prevent liquid leakage and secondary pollution. The pipeline route fits the equipment layout, reduces space occupation, and facilitates equipment integration.

[0028] Pump 7: Pump 7 is fixedly connected to the wastewater pipe 6 to provide power for wastewater transportation. It can adjust the flow rate to control the amount of wastewater entering the treatment tank 2, avoid overloading the treatment tank 2, and improve the transportation efficiency compared to natural diversion. It can adapt to different liquid level difference scenarios.

[0029] Wastewater collection tank 8: Wastewater collection tank 8 is located below wastewater baffle 9 and connected to wastewater pipe 6. It is used to temporarily store the liquid after initial separation and provide a buffer for subsequent treatment. The tank volume design can be adapted to the liquid leakage speed of the conveyor belt to avoid liquid overflow, while providing a stable water source for water pump 7.

[0030] Wastewater baffle 9: Wastewater baffle 9 is fixedly connected to the bottom of the frame 10, covering the area under the perforated conveyor belt 12. Its edge is inclined toward the wastewater collection tank 8 to block and guide the liquid leaking from the perforated conveyor belt 12, preventing the liquid from splashing around and contaminating the equipment or the ground. The inclined design can accelerate the flow of liquid to the wastewater collection tank 8, reduce residue, and improve liquid collection efficiency.

[0031] Frame 10: Frame 10 is the basic support structure of the device. The front end is fixedly connected to the original wastewater inlet 11, and the second rotating shaft 27 and the first rotating shaft 26 are fixedly connected to it. The rear end is provided with a guide plate 18 below the perforated conveyor belt 12, and the wastewater baffle 9 is fixedly connected below it. As the installation carrier of the overall structure, it integrates the components of feeding, separation, and collection into one, ensuring that the relative positions of each component are accurate. It provides stable support for the synchronous operation of the perforated conveyor belt 12 and the rolling conveyor belt 13, as well as solid-liquid separation and collection, avoiding the problem of poor coordination caused by the scattered installation of each component, and improving the overall structural strength and operational stability of the device.

[0032] Raw wastewater inlet 11: The raw wastewater inlet 11 is fixedly connected to the front end of the frame 10, with the opening facing the top of the perforated conveyor belt 12. It is used to guide the raw wastewater into the device in a directional manner. The tilt angle and position design of the inlet can guide the wastewater to fall accurately at the starting end of the perforated conveyor belt 12, avoiding wastewater splashing or leakage. Compared with the non-directional feeding structure, it can reduce initial waste, ensure that all wastewater enters the extrusion separation area, and improve separation efficiency.

[0033] Perforated conveyor belt 12: The perforated conveyor belt 12 is fixedly connected to the second rotating shaft 27, and the rolling conveyor belt 13 is set above it. The surface of the belt body is evenly distributed with through holes. As the core component for wastewater carrying and initial separation, the through holes can allow the squeezed liquid to seep out quickly, realizing the initial separation of solid and liquid. The angle between the perforated conveyor belt 12 and the rolling conveyor belt 13 forms a gradual extrusion space. As the conveyor belt runs, the extrusion pressure gradually increases, solving the problem of insufficient extrusion of traditional flat conveyor belts.

[0034] Compactor conveyor belt 13: The compactor conveyor belt 13 is fixedly connected to the first rotating shaft 26 and is set at a certain angle with the perforated conveyor belt 12. The relative movement with the perforated conveyor belt 12 applies extrusion pressure to the wastewater. The angled structure causes the wastewater to be subjected to gradually increasing pressure after entering, which fully squeezes out the water in the solids. Compared with the parallel conveyor belt, it can significantly improve the separation efficiency of wastewater with high solid content and reduce the residual water in the solids.

[0035] First pulley 14 and second pulley 16: First pulley 14 is fixedly connected to one end of first rotating shaft 26 and connected to second pulley 16 via belt. One end of second pulley 16 is connected to second rotating shaft 27 and the other end is connected to second motor 17, forming a transmission system that synchronously transmits the power of second motor 17 to first rotating shaft 26 and second rotating shaft 27, ensuring that the two conveyor belts rotate at the same speed. Belt drive has a buffering and shock absorption effect, reducing the impact on the shaft when the motor starts and extending the service life of the equipment.

[0036] The belt 15 is a closed annular transmission component, made of high-strength wear-resistant rubber or polyurethane. The inner side is provided with toothed patterns or smooth working surfaces that are adapted to the grooves of the first pulley 14 and the second pulley 16. It is tightly fitted into the grooves of the first pulley 14 and the second pulley 16 to form a closed transmission connection. The annular structure of the belt 15 can flexibly adapt to the installation distance between the first pulley 14 and the second pulley 16, eliminating the need for a complex gear meshing structure, simplifying the layout of the transmission system on the frame 10, and reducing the difficulty of equipment assembly and manufacturing costs.

[0037] Second motor 17: The second motor 17 is fixedly connected to one side of the frame 10, and its output end is connected to the second pulley 16. It provides power to the perforated conveyor belt 12 and the rolling conveyor belt 13. The speed of the conveyor belt can be controlled by adjusting the rotation speed to adapt to the treatment needs of wastewater with different concentrations. It directly drives the pulley structure, which is efficient in power transmission and facilitates the start and stop control of the equipment.

[0038] Guide plate 18: The guide plate 18 is fixedly connected to the bottom of the perforated conveyor belt 12 at the tail of the frame 10, and is inclined towards the solid collection box 19. It is used to guide the solid conveyed by the perforated conveyor belt 12 to the collection box. The inclined angle design can use gravity to make the solid slide down quickly and avoid residue. Compared with no guide structure, it can prevent the solid from scattering when it falls and reduce the amount of secondary cleaning work.

[0039] Solid collection box 19: The solid collection box 19 is located below the guide plate 18 and is used to collect the separated solids. As a centralized storage component for solids, it is positioned directly opposite the outlet of the guide plate 18. It can efficiently receive solids. The box can be removed independently, which is convenient for subsequent solid processing or transportation and improves the ease of operation.

[0040] Fine screen cylinder 20: The fine screen cylinder 20 is fixedly connected inside the treatment tank 2, and a handle 21 is fixedly connected to the top. It is used for secondary fine filtration of the initially separated wastewater to remove residual fine solids. The screen cylinder structure is detachable, and with the handle 21, it is easy to remove it for cleaning or replacement regularly to ensure stable filtration accuracy.

[0041] Handle 21: The handle 21 is fixedly connected to the top of the fine screen cylinder 20 for easy disassembly of the fine screen cylinder 20. Compared with the handle-less structure, it can reduce disassembly time and operation difficulty, and improve maintenance efficiency.

[0042] Cleaning brush 22: The cleaning brush 22 is fixedly connected to the rotating shaft 23. The bristles are in contact with the inner wall of the fine screen cylinder 20. It is used to clean the screen holes of the fine screen cylinder 20 in real time, prevent impurities from clogging, and ensure continuous and efficient filtration. Compared with manual cleaning, it can reduce downtime and improve the continuous operation capability of the equipment.

[0043] Rotating shaft 23: The top end of the rotating shaft 23 is connected to the first motor 4, and the bottom end is fixedly connected to the cleaning brush 22. It extends through the can cover 3 and into the processing tank 2 to transmit the power of the first motor 4 to the cleaning brush 22. The shaft length is adapted to the height of the processing tank 2 to ensure that the cleaning brush 22 completely covers the inner wall of the fine screen cylinder 20. The rigid structure can withstand the reaction force during cleaning and avoid deformation.

[0044] Ball valve 24: Ball valve 24 is fixedly connected to the outlet pipe 25 and is used to control the discharge of treated wastewater. It is easy to switch on and off and has good sealing performance. The timing of discharge can be flexibly adjusted according to the subsequent treatment needs to avoid leakage of wastewater in the non-treated state and ensure operational safety.

[0045] Water outlet pipe 25: Water outlet pipe 25 is fixedly connected to the bottom of treatment tank 2, and one end is connected to ball valve 24 for discharging wastewater filtered by fine screen cylinder 20. The bottom is equipped with gravity to accelerate drainage and reduce residue in the tank. The pipe diameter is adapted to the treatment capacity of treatment tank 2 to avoid poor drainage.

[0046] First rotating shaft 26: The first rotating shaft 26 is fixedly connected to the frame 10 and located above the perforated conveyor belt 12. The crushing conveyor belt 13 is fixedly connected to the shaft body, and the first pulley 14 is fixedly connected to one end. It is used to support the crushing conveyor belt 13 and transmit power. The first pulley 14 is linked with the second rotating shaft 27 to ensure that the crushing conveyor belt 13 and the perforated conveyor belt 12 rotate at the same speed. The shaft body is accurately positioned to ensure that the included angle between the crushing conveyor belt 13 and the perforated conveyor belt 12 is stable, and to avoid fluctuations in the extrusion gap from affecting the separation effect.

[0047] Second rotating shaft 27: The second rotating shaft 27 is fixedly connected to the frame 10. A perforated conveyor belt 12 is fixedly connected to the shaft body. One end is connected to the first rotating shaft 26 and the second motor 17 via the second pulley 16. It serves as a support and power transmission component for the perforated conveyor belt 12. Through synchronous rotation with the first rotating shaft 26, it drives the perforated conveyor belt 12 to operate stably. The rigid connection between the shaft body and the frame 10 can withstand the extrusion reaction force of the crushing conveyor belt 13, preventing the conveyor belt from shifting and ensuring the stability of the separation process. The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A solid-liquid separation device for wastewater treatment, comprising a frame (10), characterized in that: The frame (10) is fixedly connected to the front end of the original wastewater inlet (11), the frame (10) is fixedly connected to the second rotating shaft (27), the second rotating shaft (27) is fixedly connected to the perforated conveyor belt (12), the frame (10) above the perforated conveyor belt (12) is fixedly connected to the first rotating shaft (26), the first rotating shaft (26) is fixedly connected to the rolling conveyor belt (13), and the perforated conveyor belt (12) and the rolling conveyor belt (13) are at a certain angle. One end of the first rotating shaft (26) is fixedly connected to a first pulley (14), a belt (15) is fixedly connected to the first pulley (14), the other end of the belt (15) is fixedly connected to a second pulley (16), one end of the second pulley (16) is fixedly connected to a second rotating shaft (27), and the other end is fixedly connected to a second motor (17). A guide plate (18) is fixedly connected to the bottom of the perforated conveyor belt (12) at the tail of the frame (10), and a solid collection box (19) is provided below the guide plate (18). A wastewater baffle (9) is fixedly connected to the bottom of the frame (10), and a wastewater collection tank (8) is provided below the wastewater baffle (9). Wastewater collection tank (8) is fixedly connected to wastewater pipe (6), wastewater pipe (6) is fixedly connected to water pump (7), wastewater pipe (6) is fixedly connected to wastewater inlet (5) at the other end, wastewater inlet (5) is fixedly connected to treatment tank (2), treatment tank (2) is fixedly connected to the top of treatment tank (2), first motor (4) is fixedly connected to tank cover (3), first motor (4) is fixedly connected to the output end of first motor (4), and cleaning brush (22) is fixedly connected to the rotating shaft (23).

2. The solid-liquid separation device for wastewater treatment according to claim 1, characterized in that: The angle between the perforated conveyor belt (12) and the rolling conveyor belt (13) is an acute angle; A bracket (1) is fixedly connected to the bottom of the processing tank (2); The processing tank (2) is fixedly connected to a fine sieve cylinder (20), and a handle (21) is fixedly connected to the fine sieve cylinder (20). The bottom of the treatment tank (2) is fixedly connected to a water outlet pipe (25), and a ball valve (24) is fixedly connected to the water outlet pipe (25).

3. The solid-liquid separation device for wastewater treatment according to claim 2, characterized in that: The guide plate (18) is inclined, with its high end located below the tail of the perforated conveyor belt (12) and its low end extending to the upper opening of the solid collection box (19).

4. The solid-liquid separation device for wastewater treatment according to claim 3, characterized in that: The wastewater baffle (9) is an inclined plate structure, and its bearing surface covers the area below the perforated conveyor belt (12) and guides the wastewater to the wastewater collection tank (8).

5. A solid-liquid separation device for wastewater treatment according to claim 4, characterized in that: The aperture of the fine screen cylinder (20) is smaller than the aperture of the perforated conveyor belt (12).

6. A solid-liquid separation device for wastewater treatment according to claim 5, characterized in that: The bristles of the cleaning brush (22) are in contact with the inner wall of the fine sieve cylinder (20).

7. A solid-liquid separation device for wastewater treatment according to claim 6, characterized in that: Both the first motor (4) and the second motor (17) are servo motors, and their speeds can be adjusted by an external controller.

8. A solid-liquid separation device for wastewater treatment according to claim 7, characterized in that: The ball valve (24) is a manual ball valve, and its nominal diameter is matched with the diameter of the outlet pipe (25).

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