A sewage multi-stage treatment and discharge device and process based on safe coal mining

Abstract

The present application relates to the technical field of multi-stage sewage treatment, and discloses a sewage multi-stage treatment and discharge device and process based on safe coal mining, wherein the sewage multi-stage treatment and discharge device based on safe coal mining comprises a treatment box, further comprises a filter pipe rotatably connected in the treatment box, a hollow rocker is concentric with the rotation fulcrum of the filter pipe, and the end is fixedly connected with a resistance disc, a circular shaft is located in the hollow rocker, a bottom arc piece is located in the filter pipe and is attached, the filter pipe forms a sealed space through the resistance disc and a top shell, and the area of the filter pipe in the sealed space is cleaned by a spray rod. The outer wall of the filter pipe is washed reciprocatingly by the spray rod in the sealed space, fine coal slurry particles and crystalline minerals can be removed in the filter hole, at the same time, the scraping strip of the resistance disc synchronously cleans the pollutants attached to the inner wall, the continuous operation of the sewage treatment is ensured, the treatment efficiency and environmental safety are improved, the overall cleaning is realized, and the number of equipment downtime maintenance caused by blockage is significantly reduced.

Description

Technical Field

[0001] This invention relates to the technical field of multi-stage wastewater treatment, and in particular to a multi-stage wastewater treatment and discharge device and process based on safe coal mining. Background Technology

[0002] To ensure that wastewater discharge meets environmental standards, multi-stage wastewater treatment is necessary. This process involves several consecutive treatment stages. Wastewater first flows into a pretreatment zone, where screens are installed to intercept larger floating and suspended solids. The wastewater then enters a sedimentation and filtration zone, where gravity settling further settles suspended solids to the bottom of the treatment tank. The wastewater then passes through a filter screen to remove residual fine particles, and finally undergoes biological treatment and membrane filtration to gradually remove different types of pollutants to meet discharge standards.

[0003] However, in existing technologies, due to the large water consumption during coal mining operations and the large volume of wastewater requiring filtration in the filtration zone, filter element clogging is highly likely. Currently, the main methods for cleaning filter elements in coal mining wastewater treatment tanks are manual cleaning or backwashing. Manual cleaning has significant drawbacks, requiring considerable time for disassembly and reassembly, and due to human factors, timely maintenance is difficult to guarantee, negatively impacting the stability and lifespan of the equipment and directly reducing its reliable operating time. In practical use, it cannot meet the demands for efficient and stable treatment. Therefore, a scraper is used for real-time maintenance and cleaning of the filter element surface. This method continuously removes impurities from the filter element surface during operation. However, this method only contacts the outer surface of the filter element; fine coal sludge particles and crystalline minerals in the wastewater will seep into the inner pores with the water flow. While the scraper can remove loose impurities from the outer surface, it cannot remove particles and crystals embedded in the inner layers. When these impurities accumulate over time, they gradually clog the inner channels. In practical applications, it is difficult to effectively clean them using only a scraper. Therefore, most existing devices use automated backwashing technology. This technology effectively cleans the filter element by stripping and discharging the impurities accumulated on the inner surface of the filter element through reverse water flow. However, the water production and filtration function must be paused during backwashing, resulting in interruption of sewage filtration. Another method is to control the flusher to move continuously to comprehensively treat the filter screen. However, when the filter screen is continuously filtering, sewage keeps flowing through and trapping impurities. At this time, although the water flow sprayed by the moving flusher can wash some areas, the newly flowing sewage will immediately bring the impurities that have not been completely flushed back to the filter screen, forming secondary trapping. This causes the filtration area to always be in a semi-blocked state. Over time, uneven blockage areas will form on the surface of the filter screen, with extremely poor local permeability and uneven filtration pressure distribution, which can easily cause local damage to the filter screen, further reducing filtration efficiency and equipment stability. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-stage wastewater treatment and discharge device and process based on safe coal mining, which solves the problem of incomplete filter cleaning effect.

[0005] This invention proposes a multi-stage wastewater treatment and discharge device based on safe coal mining, comprising a treatment tank, a filter tube rotatably connected inside the treatment tank, a top shell fixedly connected inside the treatment tank, a baffle plate rotatably connected inside the treatment tank, a spray bar slidably connected inside the top shell, a hollow rocker arm rotatably connected outside the treatment tank, a telescopic device and a flushing device fixedly connected outside the treatment tank, a round shaft rotatably connected to the output end of the telescopic device, a bottom arc plate fixedly connected inside the treatment tank, and a torsion spring plate rotatably connected to the top shell. The rotation fulcrum of the hollow rocker arm is concentric with that of the filter tube. One end of the hollow rocker arm is fixedly connected to and communicates with the spray bar, and this end is fixedly connected to the baffle plate. The round shaft is located inside the hollow rocker arm, and the bottom arc plate is located inside the filter tube and fits against it. The filter tube forms a sealed space through the baffle plate and the top shell, and the area of ​​the filter tube in the sealed space is cleaned by the spray bar.

[0006] Furthermore, the processing box is provided with a protective shell and a stepper driver on the outside. The output end of the stepper driver is fixedly connected to the filter tube. The processing box is provided with a baffle plate inside. A sliding plate is slidably connected to the top of the baffle plate. Multiple springs are connected between the sliding plate and the baffle plate. An arc-shaped slot is provided on the processing box.

[0007] Furthermore, a protruding tube is fixedly connected to one end of the hollow rocker arm, the protruding tube passes through the arc-shaped slot and is fixedly connected to the spray bar, a straight groove is opened on the hollow rocker arm, the round shaft is located inside the straight groove, a sleeve is fixedly connected to the other end of the hollow rocker arm, and this end is rotatably connected to the treatment box, the sleeve is rotatably connected to the flusher and communicates with it.

[0008] Furthermore, the top shell includes two connecting plates that are fixedly connected to the processing box, an upper arc plate and a lower arc plate connected between the two connecting plates, the lower arc plate being located directly below the upper arc plate, the spray bar being located between the upper arc plate and the lower arc plate, and both the upper arc plate and the lower arc plate being concentric with the filter tube.

[0009] Furthermore, the filter tube is provided with multiple semi-circular strips at equal angles on its outer side, and an inner shaft is fixedly connected to the middle of the filter tube. The semi-circular strips are tangent to the lower arc plate, the sliding plate is in contact with the outer wall of the filter tube, and one side of the top of the sliding plate is set as an arc surface, while the other side is treated with high friction.

[0010] Furthermore, the baffle includes a disc rotatably connected inside the processing box, a sleeve shaft fixedly connected to the disc, and two scrapers fixedly connected to the sleeve shaft. The scrapers are in contact with the inner wall of the filter tube and do not contact the bottom arc plate. The sleeve shaft is located outside the inner shaft.

[0011] Furthermore, the disc has an arc-shaped groove, the bottom arc plate passes through the arc-shaped groove, the bottom arc plate and the arc-shaped groove are concentric with the filter tube, the arc length of the arc-shaped groove is twice that of the bottom arc plate, the bottom arc plate is located directly below the lower arc plate, the disc is in contact with the inner wall of the processing box, and the arc-shaped groove and the arc-shaped groove are staggered.

[0012] Furthermore, the lower arc plate is provided with multiple through slots at equal intervals, the output end of the spray bar is located inside the through slot, the lower arc plate does not contact the outer wall of the filter tube, and the bottom arc plate is located directly below the lower arc plate.

[0013] Another aspect of the present invention provides a multi-stage wastewater treatment and discharge process based on safe coal mining, employing a multi-stage wastewater treatment and discharge device based on safe coal mining, comprising the following steps:

[0014] Pretreatment: Larger suspended impurities in the wastewater are intercepted by a screen, and then the wastewater enters the treatment tank to equalize the water volume.

[0015] Sedimentation filtration: Natural sedimentation is used to coagulate and settle fine suspended solids and colloidal particles in the water, and the wastewater above is filtered through the filter pipe.

[0016] Filter self-cleaning: The filter tube is driven to rotate intermittently by a stepper driver, and the spray bar is driven to rotate back and forth through a hollow rocker arm to clean the surface of the filter tube.

[0017] Multi-stage treatment: Wastewater passes through filter pipes and undergoes aerobic and anaerobic treatment to remove soluble organic matter and substances such as nitrogen and phosphorus.

[0018] Advanced treatment: Membrane filtration further removes residual pollutants from the water, improving water clarity.

[0019] Disinfection and testing: Ultraviolet disinfection is used, and the indicators of the treated wastewater are monitored in real time to ensure that the effluent meets the hygiene standards.

[0020] The beneficial effects of this invention are:

[0021] 1. The spray bar reciprocates within the sealed space to flush the outer wall of the filter tube, which can penetrate deep into the filter pores to remove fine coal slurry particles and crystalline minerals. At the same time, the high-friction surface of the slide plate scrapes off loose impurities on the outer wall as the filter tube rotates, while the scraper of the baffle plate cleans the pollutants attached to the inner wall simultaneously. This ensures continuous operation of the sewage treatment, improves treatment efficiency and environmental safety, achieves comprehensive cleaning, and significantly reduces the number of equipment downtime maintenance caused by blockage.

[0022] 2. By driving the filter tube to rotate intermittently, when a certain area of ​​the filter tube enters the sealed space for cleaning, the other areas continue to filter normally, ensuring that the sewage treatment process is uninterrupted and without siltation. This effectively prevents environmental risks caused by sewage overflow, meets the requirements for continuous and stable environmental discharge, reduces equipment wear and labor costs, and improves operational economy.

[0023] 3. Impurities scraped off by the sliding plate are carried back to the sedimentation and filtration area as the filter tube rotates. Impurities generated during rinsing in the sealed space are carried away to the sedimentation area by the semi-circular strip, preventing sewage overflow and the spread of impurities. The entire impurity treatment process forms a closed loop, reducing secondary pollution caused by impurity leakage and further improving environmental performance. In addition, by making the filter tube and the lower arc plate non-contact and the scraper and the bottom arc plate avoid each other, frictional wear between components is reduced, extending the service life of the filter tube. Attached Figure Description

[0024] Figure 1 A three-dimensional structural diagram of the emission equipment from a first-person perspective;

[0025] Figure 2 This is a top view of the emission treatment tank.

[0026] Figure 3 For emission equipment Figure 2 Sectional view at point AA;

[0027] Figure 4 For emission equipment Figure 3 Enlarged view of point B in the middle;

[0028] Figure 5 This is a schematic diagram of the structure of the emission equipment treatment box;

[0029] Figure 6 For emission equipment Figure 5 Enlarged view of point C in the middle;

[0030] Figure 7 This is a schematic diagram of the structure of the bottom arc plate of the emission equipment;

[0031] Figure 8 This is a schematic diagram of the structure of the discharge device's baffle.

[0032] Figure 9 A schematic diagram of the hollow rocker arm in the emission device;

[0033] Figure 10 This is a schematic diagram of the top shell of the emission equipment.

[0034] In the picture:

[0035] 1. Processing box; 101. Protective shell; 102. Stepper driver; 103. Baffle plate; 104. Arc-shaped groove; 2. Filter tube; 21. Semicircular bar; 22. Inner shaft; 3. Top shell; 31. Connecting plate; 32. Upper arc plate; 33. Lower arc plate; 331. Through groove; 4. Baffle plate; 41. Disc; 411. Arc groove; 42. Sleeve shaft; 43. Scraper; 5. Spray bar; 6. Hollow rocker arm; 61. Straight groove; 62. Sleeve; 601. Protruding tube; 7. Expansion joint; 8. Washer; 9. Round shaft; 10. Bottom arc plate; 11. Torsion spring plate; 12. Slide plate; 13. Spring. Detailed Implementation

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] Example 1, refer to Figures 1-10 This first embodiment of the invention provides a multi-stage wastewater treatment and discharge device and process based on safe coal mining. It includes a treatment tank 1, a filter pipe 2 rotatably connected inside the treatment tank 1, a top shell 3 fixedly connected inside the treatment tank 1, a baffle plate 4 rotatably connected inside the treatment tank 1, a spray bar 5 slidably connected inside the top shell 3, a hollow rocker arm 6 rotatably connected outside the treatment tank 1, a telescopic device 7 and a flushing device 8 fixedly connected outside the treatment tank 1, a round shaft 9 rotatably connected to the output end of the telescopic device 7, a bottom arc plate 10 fixedly connected inside the treatment tank 1, and a component rotatably connected to the top shell 3. The torsion spring plate 11, the hollow rocker arm 6 and the rotation fulcrum of the filter tube 2 are concentric. One end of the hollow rocker arm 6 is fixedly connected to and communicates with the spray bar 5, and this end is fixedly connected to the baffle plate 4. The round shaft 9 is located inside the hollow rocker arm 6, and the bottom arc plate 10 is located inside the filter tube 2 and fits against it. The bottom arc plate 10 seals the bottom of the filter tube 2. The filter tube 2 forms a sealed space through the baffle plate 4 and the top shell 3. The area of ​​the filter tube 2 in the sealed space is cleaned by the spray bar 5, so that it is not affected by the outside. When the filter tube 2 is driven, it rotates intermittently. Therefore, the area of ​​the filter tube 2 in the sealed space is continuously cleaned by the spray bar 5 during the period when the filter tube 2 is stationary.

[0038] Specifically, the telescopic device 7 drives the circular shaft 9, which is located inside the hollow rocker arm 6, thereby causing the hollow rocker arm 6 to rotate. One end of the hollow rocker arm 6 is fixedly connected to and communicates with the spray bar 5. This achieves coordinated action between the spray bar 5 and the filter tube 2. The entire cleaning process requires no manual intervention or disassembly of the device, realizing automated continuous cleaning, eliminating reliance on manual labor, avoiding interference from the harsh environment of coal mining sites, ensuring the stability of the cleaning cycle, ensuring that the filter tube 2 is always in good filtration condition, and effectively extending the reliable operating time of the equipment. The filter tube 2 passes through... The baffle plate 4 and the top shell 3 form a sealed space. The area of ​​the filter tube 2 located in the sealed space is cleaned by the spray bar 5, thus avoiding external influences. At the same time, when the filter tube 2 is stationary, the spray bar 5 can continuously and intensively flush the area of ​​the filter tube 2 in the sealed space, ensuring the long-term stability of the water permeability of the filter tube 2. The filter tube 2 rotates intermittently after being driven. When a certain area enters the sealed space formed by the baffle plate 4 and the top shell 3 and is cleaned by the spray bar 5, other areas are still performing normal filtration operations, so that the large amount of wastewater generated by coal mining can be continuously treated, avoiding the environmental risks caused by wastewater siltation.

[0039] Reference Figures 1-6 The processing box 1 is equipped with a protective shell 101 and a stepper driver 102. The output end of the stepper driver 102 is fixedly connected to the filter tube 2. The stepper driver 102 intermittently drives the filter tube 2, causing the filter tube 2 to rotate 120 degrees at a time, so that different areas of the filter tube 2 intermittently enter the sealed space for cleaning. The processing box 1 is equipped with a baffle plate 103. A slide plate 12 is slidably connected to the top of the baffle plate 103. Multiple springs 13 are connected between the slide plate 12 and the baffle plate 103. The processing box 1 has an arc-shaped slot 104. The sedimentation area is separated by the baffle plate 103 and the slide plate 12. The driving time of the stepper driver 102 can be set.

[0040] Reference Figures 3-9 One end of the hollow rocker arm 6 is fixedly connected to a protruding tube 601, which passes through the arc-shaped slot 104 and is fixedly connected to the spray bar 5. A straight groove 61 is opened on the hollow rocker arm 6, and the round shaft 9 is located inside the straight groove 61. The other end of the hollow rocker arm 6 is fixedly connected to a sleeve 62, and this end is rotatably connected to the treatment box 1. The sleeve 62 is rotatably connected to the flusher 8 and communicates with it. The flusher 8 draws water through the sleeve 62 into the hollow rocker arm 6. After the water flows through the hollow rocker arm 6 and the protruding tube 601, it enters the spray bar 5 and cleans the filter tube 2 through the spray bar 5. When the baffle plate 4 can close the arc-shaped slot 104.

[0041] Specifically, when the telescopic device 7 extends, the circular shaft 9 moves synchronously. Since the circular shaft 9 passes through the straight groove 61 to form a sliding fit, the circular shaft 9 will be squeezed in the straight groove 61, causing the hollow rocker arm 6 to rotate around the fulcrum. When the hollow rocker arm 6 rotates, the spray rod 5 connected to it will rotate synchronously. When the telescopic device 7 retracts, the circular shaft 9 moves synchronously back, causing the hollow rocker arm 6 to rotate, thereby causing the spray rod 5 to rotate. Thus, when the telescopic device 7 extends and retracts, the spray rod 5 will reciprocate to clean the filter tube 2. In addition, the other end of the hollow rocker arm 6 is fixedly connected to the sleeve 62, and this end is rotatably connected to the treatment box 1 through a bearing. Next, to ensure that the hollow rocker arm 6 can rotate flexibly, the end of the sleeve 62 away from the hollow rocker arm 6 is rotatably connected to the flusher 8 and internally interconnected, forming a closed water flow channel and ensuring that the hollow rocker arm 6 can rotate flexibly. The water flow drawn by the flusher 8 enters the internal cavity of the hollow rocker arm 6 through the sleeve 62, flows into the spray bar 5 through the convex tube 601, and is finally sprayed onto the surface of the filter tube 2 by the nozzle at the end of the spray bar 5 to complete the cleaning operation. At the same time, the baffle plate 4 is fixedly connected to the end of the hollow rocker arm 6 near the convex tube 601. When the hollow rocker arm 6 drives the spray bar 5 and the baffle plate 4 to rotate synchronously, the baffle plate 4 always closes the arc-shaped groove 104.

[0042] Reference Figures 2-10 The top shell 3 includes two connecting plates 31 that are fixedly connected to the processing box 1, an upper arc plate 32 and a lower arc plate 33 connected between the two connecting plates 31, the lower arc plate 33 being located directly below the upper arc plate 32, and the spray bar 5 being located between the upper arc plate 32 and the lower arc plate 33. The upper arc plate 32 and the lower arc plate 33 limit the spray bar 5. Both the upper arc plate 32 and the lower arc plate 33 are concentric with the filter tube 2.

[0043] Specifically, the two connecting plates 31 are symmetrically distributed about the axis of the filter tube 2 and are fixedly connected to the treatment box 1, providing stable support for the upper arc plate 32 and the lower arc plate 33. The upper arc plate 32 and the lower arc plate 33 are both arc-shaped, and the lower arc plate 33 is located directly below the upper arc plate 32, forming an arc-shaped channel between them. The spray bar 5 is located in this arc-shaped channel. The upper arc plate 32 and the lower arc plate 33 limit the spray bar 5 from both the upper and lower directions, ensuring that the spray bar 5 moves stably along the arc-shaped channel when it rotates with the hollow rocker arm 6, without any deviation. Its distance from the surface of the filter tube 2 remains consistent. No matter where the spray bar 5 rotates to, it can flush and clean the filter tube 2 at the same distance, ensuring uniform cleaning intensity in each area and further improving the cleaning effect.

[0044] Reference Figures 2-8Multiple semicircular strips 21 are set at equal angles on the outside of the filter tube 2. An inner shaft 22 is fixedly connected to the middle of the filter tube 2. The semicircular strips 21 are tangent to the lower arc plate 33. The slide plate 12 is in contact with the outer wall of the filter tube 2. One side of the top of the slide plate 12 is set as an arc surface and the other side is treated with high friction. When the filter tube 2 rotates, the semicircular strips 21 rotate synchronously. The semicircular strips 21 will squeeze the arc surface of the slide plate 12, causing the slide plate 12 to move down. When the slide plate 12 moves down, it squeezes the spring 13. When the semicircular strips 21 are not in contact with the slide plate 12, the slide plate 12 is pushed back by the spring 13, and then the other side of the slide plate 12 is in contact with the outer wall of the filter tube 2, thereby using the slide plate 12 to treat the outer wall.

[0045] Specifically, multiple semicircular strips 21 are arranged at equal angles on the outside of the filter tube 2. Combined with its rotation angle and sealing requirements, two adjacent semicircular strips 21 can seal both ends of the lower arc plate 33, forming a stable sealing space together with the upper arc plate 32 and the bottom arc plate 10, providing reliable protection for cleaning operations. In addition, the device also includes a sliding plate 12 and a spring 13. The sliding plate 12 is in contact with the outer wall of the filter tube 2, with one side of its top edge being an arc surface and the other side undergoing high-friction treatment. When the filter tube 2 rotates intermittently under the drive of the stepper driver 102, the rotation angle is precisely controlled to 120 degrees each time. At this time, the semicircular strips 21 on the outside of the filter tube 2 rotate synchronously with the filter tube 2. When the semicircular strip 21 rotates to contact the arc surface of the sliding plate 12, it will squeeze the arc surface, causing the sliding plate 12 to move downwards. During the downward movement of the sliding plate 12, it will compress the spring 13, and the spring 13 will accumulate elastic potential energy. When the semicircular strip 21 rotates away... When the curved surface of the slide plate 12 is no longer in contact with the slide plate 12, the slide plate 12 moves upward under the rebound force of the spring 13. At this time, the side of the slide plate 12 that has undergone high friction treatment is once again tightly attached to the outer wall of the filter tube 2. Through this process, the slide plate 12 can effectively treat the outer wall of the filter tube 2, scraping off the impurities attached to the surface of the filter tube 2, and further improving the cleanliness of the filter tube 2. During the intermittent rotation of the filter tube 2, each semicircular strip 21 will sequentially attach to the lower arc plate 33 to ensure the continuity and stability of the sealed space. When the two semicircular strips 21 leave the sealed space with the rotation of the filter tube 2, the impurities located between the two semicircular strips 21 will be carried out of the sealed space with the rotation of the filter tube 2. Since the rotation direction of the filter tube 2 is matched with the sewage flow direction, these impurities will be smoothly sent back to the sedimentation and filtration area, avoiding the accumulation of impurities in the sealed space and ensuring the continuous and efficient cleaning operation.

[0046] Reference Figures 3-8 The baffle 4 includes a disc 41 rotatably connected inside the processing box 1, a sleeve shaft 42 fixedly connected to the disc 41, and two scraper strips 43 fixedly connected to the sleeve shaft 42. The scraper strips 43 are in contact with the inner wall of the filter tube 2 and do not contact the bottom arc plate 10. The sleeve shaft 42 is located outside the inner shaft 22.

[0047] Specifically, the disc 41 is made of wear-resistant material, and its edge fits tightly with the inner wall of the processing box 1. The sleeve shaft 42 is hollow cylindrical, with one end fixedly connected to the center of the disc 41 and extending into the interior of the filter tube 2. The sleeve shaft 42 is located outside the inner shaft 22 to ensure stability. Two scraper blades 43 are symmetrically distributed on the outside of the sleeve shaft 42 and fixedly connected to the sleeve shaft 42. The scraper blades 43 are in contact with the inner wall of the filter tube 2. When the disc 41 rotates with the hollow rocker arm 6, the scraper blades 43 will rotate with the sleeve shaft 42 to scrape and clean the inner wall of the filter tube 2, preventing impurities from accumulating on the inner wall of the filter tube 2 for a long time and causing blockage.

[0048] Reference Figures 2-8 The disc 41 has an arc groove 411, and the bottom arc plate 10 passes through the arc groove 411. The bottom arc plate 10, the arc groove 411 and the filter tube 2 are concentric. The arc length of the arc groove 411 is twice that of the bottom arc plate 10. The bottom arc plate 10 is located directly below the lower arc plate 33. The disc 41 is in contact with the inner wall of the treatment box 1. The arc groove 411 and the arc groove 104 are staggered to prevent sewage from overflowing.

[0049] Reference Figures 1-10 Multiple through slots 331 are equidistantly opened on the lower arc plate 33. The output end of the spray rod 5 is located inside the through slot 331, so that the output end of the spray rod 5 can better contact the filter tube 2. The lower arc plate 33 does not contact the outer wall of the filter tube 2 to avoid friction and collision. The bottom arc plate 10 is located directly below the lower arc plate 33.

[0050] The working principle of this invention is as follows: When two adjacent semicircular strips 21 contact the lower arc plate 33, they will seal both ends of the lower arc plate 33, forming a closed cleaning space together with the upper arc plate 32 and the bottom arc plate 10. The filter tube 2 rotates intermittently under the drive of the stepper driver 102, rotating precisely 120 degrees each time, so that different areas of the filter tube 2 enter the sealed space in sequence, while the areas that do not enter the sealed space continue to perform filtration, ensuring the continuity of sewage treatment. When the semicircular strips 21 rotate, they will squeeze the arc-shaped surface of the slide plate 12, causing the slide plate 12 to move down and compress the spring 13. When the semicircular strips 21 leave, the slide plate 12 returns to its original position under the rebound action of the spring 13, and its high-friction surface adheres to the outer wall of the filter tube 2, scraping off the impurities attached to the surface. The impurities are carried back to the sedimentation and filtration area as the filter tube 2 rotates. During the period when the filter tube 2 is stationary, the cleaning operation in the sealed space starts synchronously. The telescopic device 7 drives the circular shaft 9 to telescopically extend and retract. The circular shaft 9 slides in the straight groove 61 of the hollow rocker arm 6, causing the hollow rocker arm 6 to reciprocate around the fulcrum concentric with the filter tube 2. The hollow rocker arm 6 drives the spray bar 5 through the convex tube 601, moving synchronously in the arc-shaped channel formed by the upper arc plate 32 and the lower arc plate 33. At the same time, the clean water drawn by the flushing device 8 enters the hollow rocker arm 6 through the sleeve 62, and is then transported to the spray bar 5 through the convex tube 601. Finally, it is sprayed out by the nozzle of the spray bar 5 to perform high-pressure flushing on the outer wall of the filter tube 2 in the sealed space. Since the disc 41 rotates synchronously with the hollow rocker arm 6, the disc 41 always seals the arc-shaped groove 104 of the treatment box 1. At the same time, when the sleeve shaft 42 rotates with the disc 41, the two scraper strips 43 on its outer side also rotate synchronously against the inner wall of the filter tube 2 to scrape off the impurities attached to the inner wall. The scraper strips 43 do not contact the bottom arc plate 10 to avoid friction damage.

[0051] Example 2, refer to Figures 1-10 This is the second embodiment of the present invention, a multi-stage wastewater treatment and discharge process based on safe coal mining, employing a multi-stage wastewater treatment and discharge device based on safe coal mining, including the following steps:

[0052] Pretreatment: Larger suspended impurities in the wastewater are intercepted by a screen, and then the wastewater enters the treatment tank 1 to equalize the water volume.

[0053] Sedimentation filtration: Natural sedimentation is used to coagulate and settle fine suspended solids and colloidal particles in the water. The wastewater above passes through filter pipe 2 for filtration, reducing the turbidity and some organic matter in the wastewater.

[0054] Filter self-cleaning: The filter tube 2 is driven by the stepper driver 102 to rotate intermittently, and the spray bar 5 is driven to rotate back and forth through the hollow rocker 6 to clean the surface of the filter tube 2.

[0055] Multi-stage treatment: Wastewater passes through filter pipe 2 and utilizes aerobic and anaerobic treatment to remove soluble organic matter and substances such as nitrogen and phosphorus.

[0056] Advanced treatment: Membrane filtration further removes residual microparticles, pigments, odors, and some recalcitrant pollutants from the water, improving water clarity.

[0057] Disinfection and testing: The wastewater is disinfected using ultraviolet light and chlorine dioxide. The pH, suspended solids, COD, heavy metals and other indicators of the treated wastewater are monitored in real time to ensure that the effluent meets the standards.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A multi-stage wastewater treatment and discharge device based on safe coal mining, comprising a treatment tank (1), characterized in that: It also includes a filter tube (2) rotatably connected inside the processing box (1), a top shell (3) fixedly connected inside the processing box (1), a baffle (4) rotatably connected inside the processing box (1), a spray bar (5) slidably connected inside the top shell (3), a hollow rocker (6) rotatably connected outside the processing box (1), a telescopic device (7) and a flusher (8) fixedly connected outside the processing box (1), a round shaft (9) rotatably connected to the output end of the telescopic device (7), and a bottom arc plate (10) fixedly connected inside the processing box (1). A torsion spring plate (11) is rotatably connected to the top shell (3). The rotation fulcrum of the hollow rocker (6) and the filter tube (2) is concentric. One end of the hollow rocker (6) is fixedly connected to the spray bar (5) and communicates with it. This end is also fixedly connected to the baffle plate (4). The round shaft (9) is located inside the hollow rocker (6). The bottom arc plate (10) is located inside the filter tube (2) and fits against it. The filter tube (2) forms a sealed space through the baffle plate (4) and the top shell (3). The area of ​​the filter tube (2) located in the sealed space is cleaned by the spray bar (5). The processing box (1) is provided with a protective shell (101) and a stepper driver (102) on the outside. The output end of the stepper driver (102) is fixedly connected to the filter tube (2). The processing box (1) is provided with a baffle plate (103) inside. A sliding plate (12) is slidably connected to the top of the baffle plate (103). Multiple springs (13) are connected between the sliding plate (12) and the baffle plate (103). An arc-shaped slot (104) is opened on the processing box (1). One end of the hollow rocker arm (6) is fixedly connected to a convex tube (601), the convex tube (601) passes through the arc-shaped slot (104) and is fixedly connected to the spray bar (5). A straight groove (61) is opened on the hollow rocker arm (6), and the round shaft (9) is located inside the straight groove (61). The other end of the hollow rocker arm (6) is fixedly connected to a sleeve (62), and this end is rotatably connected to the treatment box (1). The sleeve (62) is rotatably connected to the flusher (8) and communicates with it. The top shell (3) includes two connecting plates (31) that are fixedly connected to the processing box (1), an upper arc plate (32) and a lower arc plate (33) connected between the two connecting plates (31), the lower arc plate (33) being located directly below the upper arc plate (32), the spray bar (5) being located between the upper arc plate (32) and the lower arc plate (33), and both the upper arc plate (32) and the lower arc plate (33) being concentric with the filter tube (2); The filter tube (2) is provided with multiple semi-circular strips (21) at equal angles on its outside. The filter tube (2) is fixedly connected to an inner shaft (22). The semi-circular strips (21) are tangent to the lower arc plate (33). The sliding plate (12) is attached to the outer wall of the filter tube (2). One side of the top of the sliding plate (12) is set as an arc surface, and the other side is treated with high friction. The blocking disc (4) includes a disc (41) rotatably connected inside the processing box (1), a sleeve shaft (42) fixedly connected to the disc (41), and two scraper strips (43) fixedly connected to the sleeve shaft (42). The scraper strips (43) are in contact with the inner wall of the filter tube (2) and do not contact the bottom arc plate (10). The sleeve shaft (42) is located outside the inner shaft (22).

2. The multi-stage wastewater treatment and discharge device based on safe coal mining as described in claim 1, characterized in that: The disc (41) has an arc groove (411) and the bottom arc plate (10) passes through the arc groove (411). The bottom arc plate (10), the arc groove (411) and the filter tube (2) are concentric. The arc length of the arc groove (411) is twice that of the bottom arc plate (10). The bottom arc plate (10) is located directly below the lower arc plate (33). The disc (41) is in contact with the inner wall of the processing box (1). The arc groove (411) and the arc groove (104) are staggered.

3. The multi-stage wastewater treatment and discharge device based on safe coal mining according to claim 1, characterized in that: The lower arc plate (33) has multiple through slots (331) evenly spaced on it. The output end of the spray bar (5) is located inside the through slot (331). The lower arc plate (33) does not contact the outer wall of the filter tube (2). The bottom arc plate (10) is located directly below the lower arc plate (33).

4. A multi-stage wastewater treatment and discharge process based on safe coal mining, employing the multi-stage wastewater treatment and discharge device based on safe coal mining as described in claim 1, characterized in that... Includes the following steps: Pretreatment: Suspended impurities in the wastewater are intercepted by a screen and then enter the treatment tank (1) to equalize the water volume; Sedimentation filtration: Natural sedimentation is used to coagulate and settle fine suspended solids and colloidal particles in the water, and the sewage above is filtered through the filter pipe (2); Filter self-cleaning: The filter tube (2) is driven to rotate intermittently by the stepper driver (102), and the spray bar (5) is driven to rotate back and forth through the hollow rocker arm (6) to clean the surface of the filter tube (2).

5. The multi-stage wastewater treatment and discharge process based on safe coal mining according to claim 4, characterized in that, Includes the following steps: Multi-stage treatment: Wastewater passes through filter pipes (2) and utilizes aerobic and anaerobic treatment to remove soluble organic matter and nitrogen and phosphorus; Advanced treatment: Membrane filtration further removes residual pollutants from the water, improving water clarity; Disinfection and testing: Ultraviolet disinfection is used, and the indicators of the treated wastewater are monitored in real time to ensure that the effluent meets the hygiene standards.

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