Fabric production wastewater purification device with lint separation

Abstract

The present application relates to the technical field of fabric production wastewater purification, and particularly relates to a fabric production wastewater purification device with lint separation, which comprises a separation and purification box, a rotationally installed central shaft, a filter plate fixed to the shaft body of the central shaft, and an external driving mechanism in transmission connection with the central shaft through a torsional spring; the filter plate is symmetrically provided with a negative pressure suction disc and a water spraying disc which are longitudinally slidable, a negative pressure pump intermittently outputs negative pressure, the negative pressure suction disc and the water spraying disc slide towards each other to clamp and lock the filter plate when the negative pressure acts, the torsional spring continuously outputs torsional energy storage along with the driving mechanism, the torsional spring releases potential energy after the negative pressure disappears, and drives the filter plate to stepwise rotate, thereby completing the cleaning of the filter plate in combination with the backwashing water flow and the negative pressure suction. The device adopts the torsional spring transmission in combination with the intermittent negative pressure mechanism, and can realize the stepwise locking of the filter plate only by the on-off of the negative pressure, thereby simplifying the transmission structure and reducing the equipment loss; the upper and lower parts are cooperatively backwashed and negatively suctioned, the embedded lint is deeply stripped, and the cleaning is more thorough.

Description

Technical Field

[0001] This invention relates to the field of wastewater purification technology in textile production, and specifically to a wastewater purification device for textile production with lint separation function. Background Technology

[0002] In the textile and dyeing production process, opening, carding, weaving, and finishing processes generate a large amount of shed fiber lint. This lint is discharged along with the production wastewater and is one of the main solid pollutants in textile production wastewater. Fiber lint is lightweight and easily tangles and clumps together. If it enters the subsequent wastewater treatment unit directly, it can easily cause blockages in pipes, pumps, and biochemical fillers. Therefore, lint separation and filtration in the wastewater pretreatment stage is an essential step.

[0003] Currently, conventional lint separation methods mostly use fixed filter plates, grids, or filter screens for filtration. These devices have a simple structure, but during operation, lint continuously accumulates on the surface of the filter media and embeds itself inside the filter pores, causing a rapid increase in filtration resistance and a decrease in throughput. In actual production, frequent shutdowns are often required, with manual disassembly and cleaning of the filter plates. This is not only cumbersome and costly in terms of manual maintenance, but it also disrupts production continuity and affects overall processing efficiency.

[0004] To address the issue of downtime for cleaning, some existing technologies employ self-cleaning filtration devices, such as high-pressure water backwashing to reverse-flushing the filter plates. However, backwashing alone has limited effectiveness in removing fine lint embedded deep within the filter pores, often requiring high water pressure and large flushing volumes, resulting in high energy consumption. Furthermore, the wastewater generated during backwashing requires additional treatment. Therefore, there is an urgent need for a simple, reliable, thorough, and continuously operating online wastewater lint separation and purification device for textile production to solve the aforementioned problems in existing technologies. Summary of the Invention

[0005] To address the aforementioned shortcomings and problems, such as the fixed filter plates being easily clogged by lint, requiring frequent shutdowns for manual cleaning and disrupting production continuity, and the limited effectiveness of conventional self-cleaning devices in removing deep lint from filter pores through simple backwashing, this invention provides a textile production wastewater purification device with lint separation capabilities. It employs a torsion spring drive combined with an intermittent negative pressure mechanism, achieving step-by-step locking of the filter plates simply by switching the negative pressure on and off, simplifying the transmission structure and reducing equipment wear. The coordinated backwashing from top to bottom and the negative pressure suction deeply remove embedded lint, resulting in a more thorough cleaning.

[0006] The solution adopted by this invention to solve its technical problem is: a wastewater purification device for fabric production with lint separation, comprising a separation and purification box and a filter plate. The top of the separation and purification box is connected to an inlet pipe, and the bottom is connected to a drain pipe. A central shaft is rotatably mounted inside the separation and purification box. The filter plate is horizontally fixed to the shaft of the central shaft. A drive mechanism is provided outside the separation and purification box. The output end of the drive mechanism is connected to the central shaft via a torsion spring, used to output rotational torque and drive the central shaft and filter plate to rotate through the torsion spring. A cleaning mechanism corresponding to and cooperating with the filter plate is provided inside the separation and purification box. The cleaning mechanism includes a negative pressure suction cup and a water spray plate. Both the negative pressure suction cup and the water spray plate are slidably installed longitudinally inside the separation and purification box, and are arranged symmetrically with the filter plate as the symmetrical plane, without contact. The top of the negative pressure suction cup is connected to a negative pressure pipe, which extends out of the separation and purification box and is connected to the input end of an external negative pressure pump. The output end of the negative pressure pump is connected to a drain pipe. The bottom of the water spray plate is connected to a clean water pipe, which extends out of the separation and purification box and is connected to the output end of an external liquid pump. The input end of the liquid pump is connected to a drain pipe through a return pipe, which is used to extract purified water to backwash the filter plate.

[0007] The negative pressure pump intermittently outputs negative pressure. When the negative pressure is applied, it drives the negative pressure suction cup and the water spray plate to slide towards each other longitudinally and clamp the filter plate, keeping the filter plate stationary with the cleaning mechanism. At the same time, the torsion spring stores energy as the drive mechanism continues to output. After the negative pressure disappears, the torsion spring releases potential energy, driving the central shaft and the filter plate to rotate step by step.

[0008] Furthermore, each of the filter plates and the cleaning mechanism is provided with at least two sets, with each set of filter plates arranged sequentially along the longitudinal direction, and the pore diameter of each filter plate gradually decreasing along the flow direction of the sewage from top to bottom. The cleaning mechanism is provided in a one-to-one correspondence with the filter plates.

[0009] Furthermore, the drive mechanism includes a drive motor fixedly installed on the top of the separation and purification box, a drive shaft rotatably installed at the top center of the separation and purification box, the drive shaft being coaxial with the central shaft, the two ends of the torsion spring being fixedly connected to the lower end of the drive shaft and the upper end of the central shaft respectively, and the output shaft of the drive motor being connected to the drive shaft through a gear set.

[0010] Furthermore, a central hood is fixedly installed inside the negative pressure suction cup, with the opening of the central hood facing the filter plate; a multi-hole spray plate is horizontally fixedly installed inside the spray plate, and a sealed spray cavity is formed between the surface of the multi-hole spray plate and the bottom inner wall of the spray plate, and the outlet end of the clean water pipe is connected to the spray cavity.

[0011] Furthermore, both sides of the negative pressure suction cup and the water spray plate are symmetrically and integrally formed with ear seats. A telescopic column is slidably installed in the ear seat along the longitudinal direction. The inner end of the telescopic column is connected to the inner wall of the ear seat through a top spring, and a universal roller is rotatably installed on the outer end. The wheel surface of the universal roller is in rolling contact with the corresponding surface of the filter plate.

[0012] Furthermore, the inner ends of the negative pressure suction cup and the water spray plate are integrally formed with ring sleeves, which are movably fitted onto the shaft of the central shaft; the outer ends of the negative pressure suction cup and the water spray plate are fixedly provided with sliders, and the inner wall of the separation purification box is provided with a longitudinal groove, and the slider is slidably fitted and installed in the groove.

[0013] Furthermore, sealing strips are embedded at the outer edges of the opposite end faces of the negative pressure suction cup and the water spray plate. The positions of the two sets of sealing strips correspond one-to-one, and they abut against each other to form a sealed cavity when the negative pressure suction cup and the water spray plate clamp the filter plate.

[0014] The beneficial effects of this invention are:

[0015] The device provided by this invention can perform online self-cleaning of filter plates without interrupting the filtration process, eliminating the need for manual disassembly and removal of lint. It is suitable for wastewater treatment needs in continuous production lines, effectively reducing the workload of manual maintenance. The drive mechanism transmits torque to the filter plates via torsion springs, and the locking and step rotation of the filter plates are achieved solely by controlling the on / off state of negative pressure. The drive motor maintains a constant speed and continuous operation, reducing equipment wear caused by frequent start-stop cycles. The overall transmission chain is simple, with few potential failure points, and can operate stably for extended periods even in high-humidity, corrosive wastewater conditions. During the cleaning process, the backwash water flow below flushes away the lint deeply embedded in the filter pores, while the directional suction from above draws out the loosened lint. Compared to a single cleaning method, this method is more thorough in cleaning fine fiber lint and can quickly restore the filtration flux of the filter plates. The backwash water source is the purified water filtered by the device itself, which is recycled and reused through a return pipeline, eliminating the need for an external clean water source. This reduces water consumption and avoids generating large amounts of additional cleaning wastewater. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0018] Figure 3 This is a frontal cross-sectional view of the present invention.

[0019] Figure 4 This is a top view cross-sectional structural diagram of the present invention;

[0020] Figure 5This is a schematic diagram of the cooperation structure between the filter plate and the cleaning mechanism of the present invention;

[0021] Figure 6 This is a partially enlarged structural diagram of the filter plate and cleaning mechanism of the present invention;

[0022] Figure 7 This is a schematic cross-sectional view of the negative pressure suction disc and water spray disc of the present invention;

[0023] Figure 8 This is a schematic diagram of the cleaning mechanism of the present invention;

[0024] Figure 9 This is a schematic diagram of the structure of Embodiment 3 of the present invention.

[0025] In the diagram: 1. Separation and purification box; 2. Filter plate; 3. Central shaft; 4. Drive motor; 5. Drive shaft; 6. Gear set; 7. Torsion spring; 8. Negative pressure suction cup; 9. Spray plate; 10. Ring; 11. Concentrated hood; 12. Negative pressure pipe; 13. Multi-hole spray plate; 14. Clean water pipe; 15. Negative pressure pump; 16. Liquid pump; 17. Drain pipe; 18. Return pipe; 19. Inlet pipe; 20. Ear seat; 21. Telescopic column; 22. Top spring; 23. Universal roller; 24. Slider; 25. Scraper; 26. Return spring; 27. Trapezoidal protrusion. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Please see Figure 1-9 This invention provides a technical solution for a textile production wastewater purification device with lint separation function:

[0028] Example 1:

[0029] The textile production wastewater purification device with lint separation provided in this embodiment is mainly used for the purification and treatment of lint-containing wastewater generated in textile weaving and dyeing processes. Through a combination of filtration and self-cleaning, the device maintains continuous and stable filtration efficiency. Figure 1 and Figure 2 As shown, the main body of the device includes a separation and purification box 1, which is a vertical closed cavity structure. The top of the box is connected to a water inlet pipe 19, and the bottom side wall is connected to a drain pipe 17. The wastewater to be treated is input into the device through the water inlet pipe 19, and after being filtered from top to bottom, it is discharged through the drain pipe 17.

[0030] A central shaft 3 is located at the center of the internal cavity of the separation and purification chamber 1. The upper and lower ends of the central shaft 3 are rotatably mounted on the top and bottom plates of the separation and purification chamber 1 respectively via bearing assemblies, allowing free rotation around its own axis. Filter plates 2 are horizontally fixedly mounted on the shaft of the central shaft 3, with a rotational gap between their outer edges and the inner wall of the separation and purification chamber 1. Filter plates 2 rotate synchronously with the central shaft 3, forming the core filtration unit of the device. A drive mechanism is located on the top outer side of the separation and purification chamber 1. The output end of the drive mechanism is connected to the upper end of the central shaft 3 via a torsion spring 7. The rotational torque output by the drive mechanism is transmitted to the central shaft 3 through the torsion spring 7, driving the filter plates 2 to rotate. When the filter plates 2 are subjected to external resistance and cannot rotate synchronously with the drive mechanism, the torsion spring 7 can undergo elastic torsion and store elastic potential energy. After the resistance is released, the potential energy is released to quickly drive the filter plates 2 to rotate.

[0031] In this embodiment, the drive mechanism includes a drive motor 4 and a gear set 6. The drive motor 4 is fixedly installed on the top outer wall of the separation purification box 1. A drive shaft 5 is rotatably installed at the center of the top plate of the separation purification box 1. The drive shaft 5 and the central shaft 3 are arranged coaxially and vertically. The upper end of the torsion spring 7 is fixedly connected to the lower end face of the drive shaft 5, and the lower end of the torsion spring 7 is fixedly connected to the upper end face of the central shaft 3. The gear set 6 includes a driving gear and a driven gear that mesh with each other. The driving gear is fixedly mounted on the output shaft end of the drive motor 4, and the driven gear is fixedly mounted on the upper shaft body of the drive shaft 5. When the drive motor 4 is running, it drives the drive shaft 5 to rotate at a constant speed through the reduction transmission of the gear set 6, and then drives the central shaft 3 and the filter plate 2 to rotate through the torsion spring 7.

[0032] The interior of the separation and purification chamber 1 is equipped with a cleaning mechanism corresponding to the position of the filter plate 2, such as... Figure 3 , Figure 4 and Figure 5As shown, the cleaning mechanism consists of a negative pressure suction cup 8 and a water spray plate 9. The negative pressure suction cup 8 is located above the filter plate 2, and the water spray plate 9 is located below the filter plate 2. Both are slidably installed longitudinally inside the separation and purification chamber 1. In the initial state, they maintain a gap without contact with the upper and lower surfaces of the filter plate 2, so as not to interfere with the normal rotation of the filter plate 2. A negative pressure pipe 12 is connected to the top center of the negative pressure suction cup 8. The negative pressure pipe 12 extends out of the top plate of the separation and purification chamber 1 and is connected to the input end of an externally installed negative pressure pump 15. The output end of the negative pressure pump 15 is connected to a drain pipe, and the lint mixture generated by suction can be discharged from the device through the drain pipe. A clean water pipe 14 is connected to the center of the bottom of the spray plate 9. The clean water pipe 14 extends out of the side wall of the separation and purification box 1 and is connected to the output end of an externally installed liquid pump 16. The input end of the liquid pump 16 is connected to the drain pipe 17 through the return pipe 18, which can extract purified water filtered by the filter plate 2 for backwashing, realizing the recycling of water resources without the need for an additional clean water source. The ends of the negative pressure pipe 12 and the clean water pipe 14 near the plate are designed as telescopic structures to accommodate the up and down movement of the negative pressure suction cup and the spray plate.

[0033] A concentrator 11 is fixedly installed inside the negative pressure suction cup 8. The opening of the concentrator 11 faces the upper surface of the filter plate 2, which can concentrate the negative pressure generated by the negative pressure pump 15 to the target cleaning area of ​​the filter plate 2, and collect the sucked-up lint to the inlet of the negative pressure pipe, thereby increasing the local suction intensity and enhancing the removal effect on deep-seated lint. A perforated spray plate 13 is horizontally fixed inside the spray plate 9. Spray holes are evenly distributed on the surface of the perforated spray plate 13. A closed spray chamber is formed between the lower surface of the perforated spray plate 13 and the bottom inner wall of the spray plate 9. The outlet of the clean water pipe 14 is connected to the spray chamber. After the backwash water enters the spray chamber, it is evenly sprayed upward through the spray holes of the perforated spray plate 13, ensuring that all parts of the filter plate in the cleaning area can be fully rinsed and avoiding cleaning dead corners.

[0034] The device operates in two modes: normal filtration and self-cleaning. In normal filtration, both the negative pressure pump 15 and the liquid pump 16 are stopped. The negative pressure suction cup 8 and the water spray plate 9 remain in their initial positions, maintaining a stable gap with the filter plate 2. The drive motor 4 operates continuously, driving the central shaft 3 and filter plate 2 to rotate at low speed via the gear set 6, drive shaft 5, and torsion spring 7. Wastewater from textile production containing lint enters the separation and purification tank 1 through the inlet pipe 19 and passes downwards through the filter plate 2 under gravity. The lint in the wastewater is trapped on the upper surface and inside the filter holes of the filter plate 2. The purified water flows into the bottom cavity of the separation and purification tank 1 and is discharged through the drain pipe 17. The low-speed rotation of the filter plate ensures that the wastewater is evenly distributed on the filter plate surface, preventing excessive accumulation of lint in localized areas and extending the interval between cleaning cycles.

[0035] When the lint accumulated on filter plate 2 reaches a certain level and the filtration resistance increases significantly, the device switches to self-cleaning mode. At this time, drive motor 4 continues to run, drive shaft 5 continuously outputs torque, and negative pressure pump 15 operates in an intermittent start-stop manner. When negative pressure pump 15 starts, a negative pressure environment is quickly formed inside negative pressure suction cup 8. Under the action of atmospheric pressure difference, negative pressure suction cup 8 slides longitudinally toward the upper surface of filter plate 2; at the same time, the negative pressure force is transmitted downward through the filter holes of filter plate 2, driving the water spray plate 9 below to overcome its own gravity and slide toward the lower surface of filter plate 2. Finally, negative pressure suction cup 8 and water spray plate 9 clamp filter plate 2 from the upper and lower sides respectively, relying on the friction force generated by the contact surface to lock filter plate 2, so that filter plate 2 temporarily stops rotating. Since drive shaft 5 continues to rotate under the drive of drive motor 4, the upper and lower ends of torsion spring 7 generate relative torsion, and elastic potential energy gradually accumulates as the torsion angle increases.

[0036] While filter plate 2 is locked, the liquid pump 16 starts simultaneously, transporting the purified water from drain pipe 17 through return pipe 18 and clean water pipe 14 to the spray chamber of spray plate 9. The water is evenly sprayed upwards through multi-hole spray plate 13, backwashing the filter holes of filter plate 2 and washing away the lint embedded in the filter holes. Combined with the negative pressure suction of the upper negative pressure suction cup 8, the washed-away lint enters the negative pressure suction cup 8 with the airflow, is collected by the collection hood 11, and then transported to the outside of the device through negative pressure pipe 12. Finally, it is collected and treated through the sewage pipe, completing the cleaning operation of the current filter plate area. This cleaning method, which combines backwashing and negative pressure suction, has a stronger cleaning ability for fine lint deeply clogging the filter holes compared to backwashing or negative pressure suction alone. It achieves a higher degree of thoroughness and can effectively restore the filtration flux of the filter plate.

[0037] When the negative pressure pump 15 stops running, the negative pressure environment inside the negative pressure suction cup 8 disappears, and the clamping and locking force on the filter plate 2 is released. At this time, the elastic potential energy stored in the torsion spring 7 is released instantaneously, causing the central shaft 3 and the filter plate 2 to rotate quickly through a certain angle, so that the next area to be cleaned on the filter plate 2 rotates to the corresponding position of the cleaning mechanism. Then the negative pressure pump 15 restarts, repeating the above cycle of clamping and locking, cleaning and impurity removal, torsion spring energy storage, and release step-by-step cleaning, and the entire filter plate 2 is thoroughly cleaned. This step-by-step cleaning method does not require additional complex indexing mechanisms and motor start-stop control systems. It only uses the on and off of negative pressure in conjunction with the elastic energy storage of the torsion spring to achieve intermittent rotation of the filter plate and area-by-area cleaning. The overall structure is simple and reliable, with few points of failure, and is suitable for long-term stable operation under sewage conditions.

[0038] Example 2:

[0039] As another optimized implementation method, based on the above implementation method, a multi-stage filtration structure and a guide and reset structure for the cleaning mechanism are further provided to further improve the filtration performance and operational stability of the device.

[0040] In this embodiment, at least two sets of filter plates 2 and their corresponding cleaning mechanisms are provided. Multiple sets of filter plates 2 are arranged longitudinally from top to bottom on the shaft of the central shaft 3, and the pore size of each layer of filter plates 2 gradually decreases along the direction of wastewater flow. After wastewater enters the device, it passes through multiple layers of filter plates 2 sequentially. Larger lint is trapped by the upper filter plates, while smaller, finer lint is gradually trapped by the lower filter plates, forming a graded filtration effect. This effectively improves the quality of the effluent while dispersing the lint trapping load, preventing rapid clogging of single-layer filter plates, and extending the overall cleaning cycle of the device. Each layer of filter plate is equipped with an independent cleaning mechanism, which can clean each layer of filter plate online, ensuring that each level of filtration unit maintains stable filtration efficiency.

[0041] To ensure the smooth longitudinal sliding of the negative pressure suction cup 8 and the water spray plate 9, both the negative pressure suction cup 8 and the water spray plate 9 have an integrally formed ring 10 on their inner ends. The ring 10 is movably fitted onto the shaft of the central shaft 3 and can slide freely along the axial direction of the central shaft 3, providing an inner sliding guide for the cleaning mechanism. Both the negative pressure suction cup 8 and the water spray plate 9 have a slider 24 fixedly installed on their outer ends. A corresponding longitudinal groove is formed on the inner wall of the separation purification box 1, and the slider 24 is slidably fitted into the groove, providing an outer sliding guide for the cleaning mechanism. Through this double-sided guiding structure, the horizontal displacement of the cleaning mechanism can be effectively limited, ensuring that it always slides smoothly along the longitudinal direction, avoiding positional deviation during cleaning, and ensuring the alignment accuracy of the cleaning area.

[0042] Meanwhile, the negative pressure suction cup 8 and the water spray plate 9 are symmetrically and integrally formed with ear seats 20 on both side walls, such as Figure 6As shown, the ear seat 20 has a longitudinally extending sliding cavity inside, and a telescopic column 21 is slidably installed inside the sliding cavity. The inner end of the telescopic column 21 is connected to the inner wall of the ear seat 20 through a top spring 22, and a universal roller 23 is rotatably installed on the outer end of the telescopic column 21. The wheel surface of the universal roller 23 rolls in contact with the corresponding surface of the filter plate 2. The top spring 22 is in a pre-compressed state, and its initial elastic force is greater than the total weight of the negative pressure suction cup 8 and the water spray plate 9. In the initial state without negative pressure, the elastic force of the top spring 22 pushes the telescopic column 21 to extend to one side of the filter plate 2, so that the universal roller 23 abuts against the surface of the filter plate 2, separating the negative pressure suction cup 8, the water spray plate 9 and the surface of the filter plate 2, maintaining a stable non-contact gap, avoiding sliding friction between the filter plate 2 and the cleaning mechanism when the filter plate 2 rotates, reducing operating wear and energy consumption, and preventing lint on the filter plate from being blocked outside the cleaning area of ​​the cleaning mechanism and unable to enter the cleaning area. When negative pressure is generated, the negative pressure suction cup 8 and the water spray plate 9 slide against each other against the elastic force of the top spring 22. The universal roller 23 always maintains rolling contact with the surface of the filter plate 2, which not only provides support and guidance but also does not hinder the stepping rotation of the filter plate 2. When the negative pressure disappears, the elastic force of the top spring 22 can push the telescopic column 21 to reset in the opposite direction, causing the negative pressure suction cup 8 and the water spray plate 9 to quickly return to their initial gap position, ensuring that the filter plate 2 returns to its free rotation state.

[0043] Furthermore, sealing strips are embedded at the outer edges of the opposite end faces of the negative pressure suction cup 8 and the water spray plate 9, with the positions of the upper and lower sets of sealing strips corresponding one-to-one. When the negative pressure suction cup 8 and the water spray plate 9 clamp the filter plate 2, the sealing strips on the upper and lower sides abut against the upper and lower surfaces of the filter plate 2, forming a closed chamber structure around the cleaning area. This effectively reduces negative pressure leakage and backwash water overflow, concentrating the suction and backwashing forces within the target cleaning area, further improving cleaning efficiency and reducing the energy consumption of the negative pressure pump and the liquid pump.

[0044] Example 3:

[0045] Based on Embodiments 1 and 2, this embodiment further improves and optimizes the structure of the negative pressure suction cup 8 to solve the problem that the negative pressure effect is weak in the edge area of ​​the filter plate 2 near the central shaft 3 and the inner wall of the separation and purification box 1, and that the lint is difficult to clean thoroughly.

[0046] like Figure 9As shown, on the side of the negative pressure suction cup 8 facing the filter plate 2, inclined scrapers 25 are hinged to the inner edge near the central axis 3 and the outer edge near the inner wall of the separation purification box 1, respectively. The outline of the scraper 25 is adapted to the shape of the corresponding side of the negative pressure suction cup 8. The upper end of the scraper 25 is hinged to the inner wall of the negative pressure suction cup 8, and the lower end is a free end that extends inclinedly towards the surface of the filter plate 2. A return spring 26 is provided between the front part of the scraper 25 and the inner wall of the negative pressure suction cup 8, and the two ends of the return spring 26 are fixedly connected to the two respectively. A trapezoidal protrusion 27 is integrally formed on the inner wall of the negative pressure suction cup 8 corresponding to the back of the scraper 25. The side of the trapezoidal protrusion 27 facing the scraper 25 is an inclined slope, which abuts against the back surface of the scraper 25 to guide and limit the swing amplitude of the scraper 25.

[0047] When the negative pressure pump 15 starts, the negative pressure suction cup 8 moves towards the upper surface of the filter plate 2 under negative pressure. The free end of the inclined scraper 25 contacts the surface of the filter plate 2 first. As the negative pressure suction cup 8 continues to move towards the filter plate 2, the scraper 25 is supported by the filter plate 2 and deflects around the central area of ​​the negative pressure suction cup 8 around the upper hinge axis. The return spring 26 is compressed accordingly. The lower end of the scraper 25 slides inward along the surface of the filter plate 2, scraping the lint accumulated at the inner and outer edges of the filter plate 2 towards the central area of ​​the negative pressure suction cup 8. When the negative pressure pump 15 stops running and the negative pressure suction cup 8 returns to its original position away from the filter plate 2, the supporting force between the scraper 25 and the filter plate 2 disappears. The return spring 26 releases its elastic potential energy, pushing the scraper 25 to swing in the opposite direction around the hinge axis until it rests against the slope of the trapezoidal protrusion 27 and returns to its initial position. By adding an inclined scraper 25 that can automatically scrape away lint as the suction cup moves, the deficiency of insufficient negative pressure intensity in the edge area of ​​the negative pressure suction cup 8 can be compensated. The lint that is easy to accumulate at the inner and outer edges of the filter plate 2 is collected into the effective range of negative pressure suction. Combined with the subsequent negative pressure suction and the backwashing below, the entire surface of the filter plate 2 can be cleaned, eliminating the risk of local blockage and improving the cleaning effect.

[0048] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wastewater purification device for textile production with lint separation, comprising a separation and purification tank (1) and a filter plate (2), wherein the top of the separation and purification tank (1) is connected to an inlet pipe (19) and the bottom is connected to an outlet pipe (17), characterized in that, The separation and purification box (1) is equipped with a rotating central shaft (3). The filter plate (2) is horizontally fixed to the shaft of the central shaft (3). The separation and purification box (1) is equipped with a drive mechanism. The output end of the drive mechanism is connected to the central shaft (3) through a torsion spring (7) to output rotational torque and drive the central shaft (3) and filter plate (2) to rotate through the torsion spring (7). The separation and purification box (1) is equipped with a cleaning mechanism that corresponds to and cooperates with the filter plate (2). The cleaning mechanism includes a negative pressure suction cup (8) and a water spray plate (9). The negative pressure suction cup (8) and the water spray plate (9) are both slidably installed in the separation and purification box (1) along the longitudinal direction. The filter plate (2) is arranged symmetrically with no contact between the top and bottom. The top of the negative pressure suction cup (8) is connected to the negative pressure pipe (12). The negative pressure pipe (12) extends out of the separation purification box (1) and is connected to the input end of the external negative pressure pump (15). The output end of the negative pressure pump (15) is connected to the sewage pipe. The bottom of the spray plate (9) is connected to the clean water pipe (14). The clean water pipe (14) extends out of the separation purification box (1) and is connected to the output end of the external liquid pump (16). The input end of the liquid pump (16) is connected to the drain pipe (17) through the return pipe (18) and is used to extract purified water to backwash the filter plate (2). The negative pressure pump (15) outputs negative pressure intermittently. When the negative pressure is applied, it drives the negative pressure suction cup (8) and the water spray plate (9) to slide towards each other in the longitudinal direction and clamp the filter plate (2), so that the filter plate (2) remains stationary with the cleaning mechanism. At the same time, the torsion spring (7) stores energy as the driving mechanism continues to output. After the negative pressure disappears, the torsion spring (7) releases potential energy and drives the central shaft (3) and the filter plate (2) to rotate step by step.

2. The wastewater purification device for textile production according to claim 1, characterized in that, The filter plate (2) and the cleaning mechanism are each provided in at least two sets. Each set of filter plates (2) is arranged in sequence along the longitudinal direction, and the pore size of each filter plate (2) gradually decreases along the flow direction of sewage from top to bottom. The cleaning mechanism is provided in a one-to-one correspondence with the filter plate (2).

3. The wastewater purification device for textile production according to claim 1, characterized in that, The drive mechanism includes a drive motor (4) fixedly installed on the top of the separation purification box (1), a drive shaft (5) is rotatably installed at the top center of the separation purification box (1), the drive shaft (5) is coaxially arranged with the central shaft (3), the two ends of the torsion spring (7) are respectively fixedly connected to the lower end of the drive shaft (5) and the upper end of the central shaft (3), and the output shaft of the drive motor (4) is connected to the drive shaft (5) through a gear set (6).

4. The wastewater purification device for textile production according to claim 1, characterized in that, The negative pressure suction cup (8) is fixedly equipped with a central cover (11), and the opening of the central cover (11) is set towards the filter plate (2); the spray plate (9) is horizontally fixedly installed with a perforated spray plate (13), and a closed spray cavity is formed between the plate surface of the perforated spray plate (13) and the bottom inner wall of the spray plate (9); the water outlet of the water purification pipe (14) is connected to the spray cavity.

5. The wastewater purification device for textile production according to claim 1, characterized in that, Both sides of the negative pressure suction cup (8) and the water spray plate (9) are symmetrically integrally formed with ear seats (20). A telescopic column (21) is slidably installed in the ear seat (20) along the longitudinal direction. The inner end of the telescopic column (21) is connected to the inner wall of the ear seat (20) through a top spring (22), and the outer end is rotatably installed with a universal roller (23). The wheel surface of the universal roller (23) is in rolling contact with the corresponding surface of the filter plate (2).

6. The wastewater purification device for textile production according to claim 1, characterized in that, The inner ends of the negative pressure suction cup (8) and the water spray plate (9) are integrally formed with a ring sleeve (10), and the ring sleeve (10) is movably fitted onto the shaft of the central shaft (3); the outer ends of the negative pressure suction cup (8) and the water spray plate (9) are fixedly provided with sliders (24), and the inner side wall of the separation purification box (1) is provided with a groove along the longitudinal direction, and the slider (24) is slidably fitted and installed in the groove.

7. The wastewater purification device for textile production according to claim 1, characterized in that, Sealing strips are embedded at the outer edges of the opposite end faces of the negative pressure suction cup (8) and the water spray plate (9). The positions of the two sets of sealing strips correspond one to one, and they abut against each other to form a sealed cavity when the negative pressure suction cup (8) and the water spray plate (9) clamp the filter plate (2).

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