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

Abstract

The invention 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, and the sewage multi-stage treatment and discharge device based on safe coal mining comprises a treatment box and further comprises a filter pipe rotationally connected to the interior of the treatment box, the hollow rocker is concentric with a rotating fulcrum of the filter tube, the end of the hollow rocker is fixedly connected with the blocking disc, the circular shaft is located in the hollow rocker, the bottom arc piece is located in the filter tube and attached to the filter tube, the filter tube and the top shell form a sealed space through the blocking disc, and the area, located in the sealed space, of the filter tube is cleaned through the spraying rod. The spray rod flushes the outer wall of the filter pipe back and forth in the sealed space, fine coal slime particles and crystal minerals can be removed by penetrating into the filter holes, meanwhile, the scraping strips of the blocking disc synchronously clean pollutants attached to the inner wall, continuous operation of sewage treatment is guaranteed, the treatment efficiency and the environmental protection safety are improved, comprehensive cleaning is achieved, and the service life of the filter pipe is prolonged. And the shutdown maintenance frequency of the equipment caused by blockage is obviously reduced.

Description

Technical Field

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

[0002] In order to ensure the environmental protection indicators of sewage discharge, multi-stage sewage treatment is required first. Multi-stage sewage treatment is through multiple continuous treatment stages. The sewage first flows into the pretreatment area, where a grid is installed to intercept larger floating objects and suspended matter in the sewage. Then the sewage enters the sedimentation and filtration area. This area uses the principle of gravity sedimentation to allow the suspended solids in the sewage to further settle to the bottom of the treatment tank. The sewage then passes through the filter to filter out the fine particulate matter remaining in the sewage, and then through biological treatment and membrane filtration, different types of pollutants in the sewage are gradually removed to meet the emission standards.

[0003] However, in the existing technology, due to the large amount of water consumed during coal mining, the amount of sewage that needs to be filtered in the filtration area is large, which can easily lead to filter clogging. The current methods of cleaning the filter elements of coal mining sewage treatment boxes are mainly manual or backwashing. Manual cleaning has obvious disadvantages and requires a lot of time to disassemble and reassemble the device. Due to human factors, it is difficult to ensure timely maintenance, which has a negative impact on the stability and service life of the device, directly reducing the reliable operation time of the equipment. In actual use, it cannot meet the requirements of efficient and stable treatment. In view of this, a scraper is used to perform real-time maintenance and cleaning on the surface of the filter element. This method can continuously remove impurities on the surface of the filter element during the operation of the device, but can only contact the outer surface of the filter element. The fine coal slime particles and crystallized minerals in the sewage will penetrate into the inner pores with the water flow. When the scraper is running, it can only scrape the loose impurities on the outer surface, but cannot remove the particles and crystals embedded in the inner layer. The long-term accumulation of these impurities will gradually clog the inner channel. In actual applications, it is difficult to effectively clean them using a scraper alone. Therefore, most existing devices use backwashing automation technology, which can effectively clean 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 filtration function must be suspended during the backwashing process, resulting in interruption of sewage filtration. Another method is to control the flusher to move continuously and comprehensively treat the filter screen. However, when the filter screen continues to filter, sewage continues to flow through and intercept impurities. At this time, although the water flow sprayed by the mobile flusher can flush part of the area, the newly flowing sewage will immediately bring the impurities that have not been completely washed away back to the filter screen, forming a secondary interception, causing 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, the local water permeability will be extremely poor, and the filtration pressure distribution will be uneven, which can easily cause local damage to the filter screen, further reducing the filtration efficiency and equipment stability. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-stage sewage treatment and discharge device and process based on safe coal mining, so as to solve the problem of incomplete filter element cleaning effect.

[0005] The hopper is connected to the filter housing, and the filter housing is connected to the filter housing, and the filter housing is connected to the filter housing.

[0006] Furthermore, a protective shell and a stepper driver are provided on the outside of the processing box, the output end of the stepper driver is fixedly connected to the filter tube, a baffle plate is provided inside the processing box, a slide plate is slidably connected to the top of the baffle plate, a plurality of springs are connected between the slide plate and the baffle plate, and an arc-shaped slot is opened on the processing box.

[0007] Furthermore, one end of the hollow rocker is fixedly connected to a convex tube, which passes through the arc-shaped slot and is fixedly connected to the spray rod. A straight groove is provided on the hollow rocker, and the circular shaft is located inside the straight groove. The other end of the hollow rocker is fixedly connected to a sleeve, and this end is rotatably connected to the processing box. The sleeve is rotatably connected to the flusher and is interconnected.

[0008] Furthermore, the top shell includes two connecting plates 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 is located directly below the upper arc plate, the spray rod is located between the upper arc plate and the lower arc plate, and the upper arc plate and the lower arc plate are both concentric with the filter tube.

[0009] Furthermore, a plurality of semicircular bars are provided at equal angles on the outside of the filter tube, an inner shaft is fixedly connected to the middle of the filter tube, the semicircular bars are tangent to the lower arc plate, the slide plate is fitted with the outer wall of the filter tube, one side of the top of the slide plate is set as an arc surface, and the other side is treated with high friction.

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

[0011] Furthermore, a circular arc slot is provided on the disc, the bottom arc piece passes through the circular arc slot, the bottom arc piece, the circular arc slot and the filter tube are concentric, the arc length of the circular arc slot is twice that of the bottom arc piece, the bottom arc piece is located directly below the lower arc plate, the disc is fitted with the inner wall of the processing box, and the circular arc slot and the arc-shaped slot are staggered.

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

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

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

[0015] Sedimentation and filtration: natural sedimentation is used to make the fine suspended matter and colloidal particles in the water coagulate and precipitate, and the sewage above is filtered through the filter tube.

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

[0017] Multi-stage treatment: Sewage passes through filter pipes and is treated aerobically and anaerobically to remove soluble organic matter and substances such as nitrogen and phosphorus.

[0018] Advanced treatment: Membrane filtration further removes residual pollutants in the water and improves water clarity.

[0019] Disinfection and testing: Disinfection is carried out through ultraviolet rays, and the indicators of treated sewage are monitored in real time to ensure that the effluent hygiene indicators meet the standards.

[0020] Beneficial effects of the present invention:

[0021] 1. The spray rod flushes the outer wall of the filter tube back and forth in a sealed space, which can penetrate deep into the filter pores to remove fine coal slime particles and crystallized minerals. At the same time, the high-friction surface of the slide plate scrapes away loose impurities on the outer wall as the filter tube rotates, and the scraping strips of the baffle plate simultaneously clean the pollutants attached to the inner wall, ensuring the continuous operation of sewage treatment, improving treatment efficiency and environmental safety, achieving comprehensive cleaning, and significantly reducing the number of equipment shutdowns and maintenance due to blockages.

[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 rest of the area is still filtered normally, ensuring that there is no interruption or accumulation in the sewage treatment process, which can effectively prevent environmental risks caused by sewage overflow, meet the requirements of continuous and stable environmental emissions, reduce equipment loss and labor costs, and improve operating economy.

[0023] 3. The impurities scraped off by the slide are brought back to the sedimentation and filtration area as the filter tube rotates. The impurities generated by flushing in the sealed space are taken away to the sedimentation area by the semicircular strips, avoiding the spread of impurities carried by sewage overflow. The entire impurity treatment process forms a closed loop, reducing secondary pollution caused by impurity leakage, further improving environmental protection performance. In addition, by making the filter tube non-contact with the lower arc plate and the scraping strip and the bottom arc plate avoidance structure, the friction loss between components is reduced and the service life of the filter tube is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the discharge equipment from the first perspective;

[0025] Figure 2 It is a top view of the treatment box of the emission equipment;

[0026] Figure 3 For emission equipment Figure 2 Cross-sectional view at AA in the middle;

[0027] Figure 4 For emission equipment Figure 3 A magnified schematic diagram of point B in the middle;

[0028] Figure 5 It is a structural diagram of the treatment box of the emission equipment;

[0029] Figure 6 For emission equipment Figure 5 The enlarged schematic diagram of point C in the middle;

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

[0031] Figure 8 This is a structural diagram of the baffle of the discharge equipment;

[0032] Figure 9 It is a structural diagram of the hollow rocker of the discharge equipment;

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

[0034] In the picture:

[0035] 1. Processing box; 101. Protective shell; 102. Stepper driver; 103. Blocking plate; 104. Arc notch; 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 notch; 4. Blocking plate; 41. Circular disk; 411. Circular notch; 42. Sleeve shaft; 43. Scraper; 5. Spray rod; 6. Hollow rocker; 61. Straight groove; 62. Sleeve; 601. Convex pipe; 7. Telescope; 8. Flusher; 9. Circular shaft; 10. Bottom arc plate; 11. Torsion spring plate; 12. Slide plate; 13. Spring. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] Example 1, refer to Figures 1-10 , which is the first embodiment of the present invention, provides a multi-stage sewage treatment and discharge device and process based on safe coal mining, including a treatment box 1, a filter tube 2 rotatably connected to the inside of the treatment box 1, a top shell 3 fixedly connected to the inside of the treatment box 1, a baffle 4 rotatably connected to the inside of the treatment box 1, a spray rod 5 slidably connected to the inside of the top shell 3, a hollow rocker 6 rotatably connected to the outside of the treatment box 1, a telescoping device 7 and a flushing device 8 fixedly connected to the outside of the treatment box 1, a circular shaft 9 rotatably connected to the output end of the telescoping device 7, a bottom arc piece 10 fixedly connected to the inside of the treatment box 1, and a bottom arc piece 10 rotatably connected to the top shell 3. The torsion spring plate 11, the hollow rocker 6 is concentric with the rotation fulcrum of the filter tube 2, one end of the hollow rocker 6 is fixedly connected to the spray rod 5 and communicates with each other, and the end is fixedly connected to the baffle plate 4, the circular shaft 9 is located inside the hollow rocker 6, the bottom arc piece 10 is located inside the filter tube 2 and fits, and the bottom of the filter tube 2 is closed by the bottom arc piece 10, the filter tube 2 forms a sealed space through the baffle plate 4 and the top shell 3, the area where the filter tube 2 is located in the sealed space is cleaned by the spray rod 5, so that it is not affected by the outside, and the filter tube 2 rotates intermittently after being driven, and then the filter tube 2 is located in the area of ​​the sealed space, and is continuously cleaned by the spray rod 5 during the stagnation of the filter tube 2.

[0038] Specifically, the circular shaft 9 is driven by the telescopic device 7, and the circular shaft 9 is located inside the hollow rocker 6, which in turn drives the hollow rocker 6 to rotate. One end of the hollow rocker 6 is fixedly connected to the spray rod 5 and is interconnected, thus realizing the coordinated action of the spray rod 5 and the filter tube 2. The entire cleaning process does not require manual intervention or disassembly of the device, thus realizing automatic continuous cleaning, getting rid of manual dependence, avoiding interference of manual operation by the harsh environment of the coal mining site, ensuring the stability of the cleaning cycle, ensuring that the filter tube 2 is always in a good filtering state, effectively extending the reliable operation time of the equipment, and the filter tube 2 passing through The baffle plate 4 and the top shell 3 form a sealed space, and the area where the filter tube 2 is located in the sealed space is cleaned by the spray rod 5, so that it is not affected by the outside. At the same time, when the filter tube 2 is stagnant, the spray rod 5 can continuously and centrally flush the filter tube 2 area in the sealed space to ensure that the water permeability of the filter tube 2 is stable for a long time. After being driven, the filter tube 2 rotates intermittently. 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 rod 5, other areas are still performing normal filtering operations, so that a large amount of sewage generated by coal mining can be continuously treated, avoiding environmental risks caused by sewage accumulation.

[0039] Reference Figures 1-6 The outside of the processing box 1 is provided 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 filter tube 2 is intermittently driven by the stepper driver 102, so that the filter tube 2 is rotated one hundred and twenty degrees at a time, so that different areas of the filter tube 2 intermittently enter the sealed space and are cleaned. A baffle plate 103 is provided inside the processing box 1. The top of the baffle plate 103 is slidably connected to a slide plate 12. A plurality of springs 13 are connected between the slide plate 12 and the baffle plate 103. An arc-shaped notch 104 is opened on the processing box 1. 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 Figure 3-Figure 9 One end of the hollow rocker 6 is fixedly connected to a convex tube 601, which passes through the arc-shaped slot 104 and is fixedly connected to the spray rod 5. A straight slot 61 is provided on the hollow rocker 6, and the circular shaft 9 is located inside the straight slot 61. The other end of the hollow rocker 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 is interconnected. The flusher 8 draws water through the sleeve 62 into the hollow rocker 6. The water flows through the hollow rocker 6 and the convex tube 601 and then enters the spray rod 5. The filter tube 2 is cleaned through the spray rod 5. When the blocking plate 4 can close the arc-shaped slot 104,

[0041] Specifically, when the telescopic device 7 is extended, 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, so that the hollow rocker 6 rotates with a fulcrum. When the hollow rocker 6 rotates, the spray rod 5 connected thereto will rotate synchronously. When the telescopic device 7 is retracted, the circular shaft 9 moves back synchronously, so that the hollow rocker 6 rotates, thereby rotating the spray rod 5. When the telescopic device 7 is extended or retracted, the spray rod 5 is rotated back and forth to clean the filter tube 2. In addition, the other end of the hollow rocker 6 is fixedly connected to the sleeve 62, and this end is connected to the treatment box 1 for rotation through a bearing. The water flow extracted by the washer 8 enters the internal cavity of the hollow rocker 6 through the sleeve 62, flows into the spray rod 5 through the convex pipe 601, and is finally sprayed onto the surface of the filter tube 2 by the nozzle at the end of the spray rod 5 to complete the cleaning operation. At the same time, the baffle plate 4 is fixedly connected to the end of the hollow rocker 6 close to the convex pipe 601. When the hollow rocker 6 drives the spray rod 5 and the baffle plate 4 to rotate synchronously, the baffle plate 4 always closes the arc-shaped slot 104.

[0042] Reference Figure 2-Figure 10 The top shell 3 includes two connecting plates 31 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 is located directly below the upper arc plate 32, and the spray rod 5 is located between the upper arc plate 32 and the lower arc plate 33. The spray rod 5 is limited by the upper arc plate 32 and the lower arc plate 33. The upper arc plate 32 and the lower arc plate 33 are both 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 processing box 1 to provide 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 structures, and the lower arc plate 33 is located directly below the upper arc plate 32, forming an arc channel between the two. The spray rod 5 is located in the arc channel. The upper arc plate 32 and the lower arc plate 33 limit the spray rod 5 from the upper and lower directions to ensure that the spray rod 5 always moves stably along the arc channel when rotating with the hollow rocker 6 without deviation, and its distance from the surface of the filter tube 2 is always consistent. No matter which position the spray rod 5 rotates to, the filter tube 2 can be flushed and cleaned at the same distance, ensuring uniform cleaning intensity in each area and further improving the cleaning effect.

[0044] Reference Figure 2-Figure 8, a plurality of semicircular bars 21 are provided 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 bars 21 are tangent to the lower arc plate 33, and the slide plate 12 fits the outer wall of the filter tube 2. One side of the top of the slide plate 12 is set as a curved surface and the other side is treated with high friction. When the filter tube 2 rotates, the semicircular bars 21 rotate synchronously, and the semicircular bars 21 will squeeze the curved surface of the slide plate 12, causing the slide plate 12 to move downward. When the slide plate 12 moves downward, it squeezes the spring 13. When the semicircular bars 21 are not in contact with the slide plate 12, the slide plate 12 is pushed back by the rebound force of the spring 13, and then the other side of the slide plate 12 fits the outer wall of the filter tube 2, thereby using the slide plate 12 to process the outer wall.

[0045] Specifically, a plurality of semicircular bars 21 are provided at equal angles on the outside of the filter tube 2. In combination with the rotation angle and sealing requirements, two adjacent semicircular bars 21 can close the two ends of the lower arc plate 33, and together with the upper arc plate 32 and the bottom arc plate 10, form a stable sealing space, providing reliable protection for the cleaning operation. In addition, the device is also provided with a slide plate 12 and a spring 13. The slide plate 12 fits the outer wall of the filter tube 2, and one side of its top is an arc surface, and the other side is treated with high friction. When the filter tube 2 rotates intermittently under the drive of the stepper driver 102, each rotation angle is accurately controlled to be one hundred and twenty degrees. At this time, the semicircular bars 21 on the outside of the filter tube 2 rotate synchronously with the filter tube 2. When the semicircular bars 21 rotate to contact the arc surface of the slide plate 12, the arc surface will be squeezed to make the slide plate 12 move downward. During the downward movement of the slide plate 12, the spring 13 is squeezed, and the spring 13 accumulates elastic potential energy. When the semicircular bars 21 rotate 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 back upward under the rebound thrust of the spring 13. At this time, the side of the slide plate 12 that has been treated with high friction is tightly fitted with the outer wall of the filter tube 2 again. Through this process, the slide plate 12 can effectively treat the outer wall of the filter tube 2, scrape off the impurities attached to the surface of the filter tube 2, and further improve the cleanliness of the filter tube 2. During the intermittent rotation of the filter tube 2, each semicircular bar 21 will fit with the lower arc plate 33 in turn to ensure the continuity and stability of the sealed space. When the two semicircular bars 21 rotate with the filter tube 2 to leave the sealed space, the impurities between the two semicircular bars 21 will be brought out of the sealed space as the filter tube 2 rotates. 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, ensuring the continuous and efficient cleaning operation.

[0046] Reference Figure 3-Figure 8 The resistance plate 4 includes a disc 41 rotatably connected to the inside of the processing box 1, a sleeve shaft 42 fixedly connected to the disc 41, and two scraping strips 43 fixedly connected to the sleeve shaft 42. The scraping strips 43 are in contact with the inner wall of the filter tube 2. The scraping strips 43 do not contact the bottom arc piece 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 42 is hollow cylindrical, one end of which is fixedly connected to the center of the disc 41 and extends to the inside of the filter tube 2. The sleeve 42 is located outside the inner shaft 22 to ensure stability. The two scrapers 43 are symmetrically distributed on the outside of the sleeve 42 and are fixedly connected to the sleeve 42. The scrapers 43 fit the inner wall of the filter tube 2. When the disc 41 rotates with the hollow rocker 6, the scraper 43 will rotate with the sleeve 42 to scrape and clean the inner wall of the filter tube 2 to avoid long-term accumulation of impurities on the inner wall of the filter tube 2 and cause blockage.

[0048] Reference Figure 2-Figure 8 A circular arc slot 411 is opened on the disc 41, and the bottom arc piece 10 passes through the circular arc slot 411. The bottom arc piece 10, the circular arc slot 411 and the filter tube 2 are concentric. The arc length of the circular arc slot 411 is twice that of the bottom arc piece 10. The bottom arc piece 10 is located directly below the lower arc plate 33. The disc 41 fits against the inner wall of the treatment box 1. The circular arc slot 411 and the arc slot 104 are staggered to prevent sewage from overflowing.

[0049] Reference Figures 1-10 A plurality of through slots 331 are equidistantly provided 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 piece 10 is located directly below the lower arc plate 33.

[0050] The working principle of the present invention is as follows: when two adjacent semicircular bars 21 come into contact with the lower arc plate 33, the two ends of the lower arc plate 33 will be closed, and together with the upper arc plate 32 and the bottom arc plate 10, a closed cleaning space will be formed. The filter tube 2 is driven by the stepping driver 102 to rotate intermittently, and each time it rotates precisely one hundred and twenty degrees, so that different areas of the filter tube 2 enter the sealed space in turn, while the areas that have not entered the sealed space continue to filter, ensuring the continuity of sewage treatment. When the semicircular bar 21 rotates, it squeezes the curved surface of the slide plate 12, causing the slide plate 12 to move downward and compress the spring 13. When the semicircular bar 21 leaves, the slide plate 12 is reset under the rebound action of the spring 13, and its high friction surface fits the outer wall of the filter tube 2 to scrape off impurities attached to the surface. The impurities are brought back to the sedimentation and filtration area as the filter tube 2 rotates. During the stagnation of the filter tube 2, the cleaning operation in the sealed space is started synchronously. , the telescopic device 7 drives the circular shaft 9 to do telescopic movement, and the circular shaft 9 slides in the straight groove 61 of the hollow rocker 6, driving the hollow rocker 6 to rotate back and forth with a fulcrum concentric with the filter tube 2. The hollow rocker 6 drives the spray rod 5 through the convex tube 601 and moves synchronously in the arc channel formed by the upper arc plate 32 and the lower arc plate 33. At the same time, the clean water extracted by the washer 8 enters the hollow rocker 6 through the sleeve 62, and is then transported to the spray rod 5 through the convex tube 601, and finally sprayed out by the nozzle of the spray rod 5, performing high-pressure washing on the outer wall of the filter tube 2 in the sealed space. Since the disc 41 rotates synchronously with the hollow rocker 6, its disc 41 always closes the arc notch 104 of the processing box 1. At the same time, when the sleeve shaft 42 rotates with the disc 41, the two scraping strips 43 on its outer side rotate synchronously against the inner wall of the filter tube 2 to scrape off impurities attached to the inner wall, and the scraping strips 43 do not contact the bottom arc piece 10 to avoid friction damage.

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

[0052] Pretreatment: Larger suspended impurities in the sewage are intercepted by the screen, and then enter the treatment box 1 to balance the water volume.

[0053] Sedimentation and filtration: natural sedimentation is used to make the fine suspended matter and colloidal particles in the water condense and precipitate. The sewage above is filtered through the filter pipe 2 to reduce the turbidity of the sewage and some organic matter.

[0054] Self-cleaning of the filter screen: The filter tube 2 is driven by the stepping driver 102 to rotate intermittently, and the hollow rocker 6 drives the spray rod 5 to rotate back and forth to clean the surface of the filter tube 2.

[0055] Multi-stage treatment: The sewage passes through the filter pipe 2 and is treated by aerobic and anaerobic methods to remove soluble organic matter and nitrogen, phosphorus and other substances.

[0056] Deep treatment: Membrane filtration further removes residual tiny particles, pigments, odors and some difficult-to-degrade pollutants in the water to improve water clarity.

[0057] Disinfection and testing: Disinfection is carried out using ultraviolet light and chlorine dioxide, and the pH value, suspended solids, COD, heavy metals and other indicators of the treated sewage are monitored in real time to ensure that the effluent indicators meet 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 the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A multi-stage sewage treatment and discharge device based on safe coal mining, comprising a treatment box (1), characterized in that: The invention also includes a filter tube (2) rotatably connected to the inside of the treatment box (1), a top shell (3) fixedly connected to the inside of the treatment box (1), a baffle (4) rotatably connected to the inside of the treatment box (1), a spray rod (5) slidably connected to the inside of the top shell (3), a hollow rocker (6) rotatably connected to the outside of the treatment box (1), a telescopic device (7) and a flusher (8) fixedly connected to the outside of the treatment box (1), a circular shaft (9) rotatably connected to the output end of the telescopic device (7), a bottom arc piece (10) fixedly connected to the inside of the treatment box (1), and The torsion spring plate (11) is rotatably connected to the top shell (3), the hollow rocker (6) is concentric with the rotation fulcrum of the filter tube (2), one end of the hollow rocker (6) is fixedly connected to the spray rod (5) and is interconnected, and the end is fixedly connected to the baffle plate (4), the circular shaft (9) is located inside the hollow rocker (6), the bottom arc plate (10) is located inside the filter tube (2) and is in contact with the baffle plate (4), the filter tube (2) forms a sealed space through the baffle plate (4) and the top shell (3), and the area of ​​the filter tube (2) located in the sealed space is cleaned by the spray rod (5).

2. The multi-stage sewage treatment and discharge device based on safe coal mining according to claim 1 is characterized in that: The outside of the processing box (1) is provided with a protective shell (101) and a stepping driver (102); the output end of the stepping driver (102) is fixedly connected to the filter tube (2); the inside of the processing box (1) is provided with a baffle plate (103); the top of the baffle plate (103) is slidably connected to a slide plate (12); a plurality of springs (13) are connected between the slide plate (12) and the baffle plate (103); and an arc-shaped notch (104) is provided on the processing box (1).

3. The multi-stage sewage treatment and discharge device based on safe coal mining according to claim 2 is characterized in that: One end of the hollow rocker (6) is fixedly connected to a convex tube (601), and the convex tube (601) passes through the arc-shaped notch (104) and is fixedly connected to the spray rod (5). A straight groove (61) is provided on the hollow rocker (6), and the circular shaft (9) is located inside the straight groove (61). The other end of the hollow rocker (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 is interconnected.

4. The multi-stage sewage treatment and discharge device based on safe coal mining according to claim 2 is characterized in that: The top shell (3) comprises two connecting plates (31) 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 the upper arc plate (32) and the lower arc plate (33) being concentric with the filter tube (2).

5. The multi-stage sewage treatment and discharge device based on safe coal mining according to claim 4 is characterized in that: The outside of the filter tube (2) is provided with a plurality of semicircular strips (21) at equal angles, the middle of the filter tube (2) is fixedly connected with an inner shaft (22), the semicircular strips (21) are tangent to the lower arc plate (33), the slide plate (12) is fitted with the outer wall of the filter tube (2), one side of the top of the slide plate (12) is provided with an arc surface, and the other side is subjected to high friction treatment.

6. The multi-stage sewage treatment and discharge device based on safe coal mining according to claim 2 is characterized in that: The blocking disc (4) comprises a disc (41) rotatably connected to the interior of the treatment box (1), a sleeve shaft (42) fixedly connected to the disc (41), and two scraping strips (43) fixedly connected to the sleeve shaft (42), wherein the scraping strips (43) are in contact with the inner wall of the filter tube (2) and do not contact the bottom arc sheet (10), and the sleeve shaft (42) is located outside the inner shaft (22).

7. The multi-stage sewage treatment and discharge device based on safe coal mining according to claim 6 is characterized in that: The circular disc (41) is provided with an arc notch (411), the bottom arc piece (10) passes through the arc notch (411), the bottom arc piece (10), the arc notch (411) and the filter tube (2) are concentric, the arc length of the arc notch (411) is twice that of the bottom arc piece (10), the bottom arc piece (10) is located directly below the lower arc plate (33), the circular disc (41) is in contact with the inner wall of the processing box (1), and the arc notch (411) and the arc-shaped notch (104) are arranged in an alternating manner.

8. The multi-stage sewage treatment and discharge device based on safe coal mining according to claim 4 is characterized in that: The lower arc plate (33) is provided with a plurality of through slots (331) at equal intervals, the output end of the spray rod (5) is located inside the through slots (331), the lower arc plate (33) does not contact the outer wall of the filter tube (2), and the bottom arc plate (10) is located directly below the lower arc plate (33).

9. A multi-stage sewage treatment and discharge process based on safe coal mining, using the multi-stage sewage treatment and discharge device based on safe coal mining according to claim 2, characterized in that: The following steps are involved: Pretreatment: The larger suspended impurities in the sewage are intercepted by the screen, and then the water enters the treatment box (1) to balance the water volume; Sedimentation filtration: natural sedimentation is used to make the fine suspended matter and colloidal particles in the water condense and settle, and the sewage above passes through the filter pipe (2) for filtration; Self-cleaning of the filter screen: the filter tube (2) is driven by the stepping driver (102) to rotate intermittently, and the hollow rocker (6) drives the spray rod (5) to rotate back and forth to clean the surface of the filter tube (2).

10. The multi-stage sewage treatment and discharge process based on safe coal mining according to claim 9 is characterized in that: The following steps are involved: Multi-stage treatment: sewage passes through filter tubes (2) and uses aerobic and anaerobic treatment to remove soluble organic matter and nitrogen, phosphorus and other substances; Deep treatment: Membrane filtration further removes residual pollutants in the water and improves water clarity; Disinfection and testing: Disinfection is carried out through ultraviolet rays, and the indicators of treated sewage are monitored in real time to ensure that the effluent hygiene indicators meet the standards.

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