A wastewater treatment method based on biodegradation of ammonia nitrogen

Abstract

The present invention discloses a wastewater treatment method based on biodegradation of ammonia nitrogen, and the present invention relates to the technical field of chemical wastewater treatment. The wastewater treatment based on biodegradation of ammonia nitrogen is completed by the cooperation of a treatment table, a multi-stage fractional filtration integrated mechanism, a reciprocating swing part and an intermittent feeding mechanism. The multi-stage fractional filtration integrated mechanism includes two second arc-shaped frames fixedly connected to the lower parts of the opposite sides of the supporting plates through lower fixing blocks. A first screen cylinder is rotatably connected in the two first arc-shaped frames. The pore diameter of the first screen cylinder is larger than the pore diameter of the second screen cylinder. The present invention can sequentially filter impurity particles of different sizes step by step, reduce the possibility of blockage, reduce the load of a single filter screen, improve the efficiency of each filtration stage, and separately treating large particles and small particles can more effectively remove suspended solids, thereby improving the quality of the filtered wastewater. Moreover, the hierarchical filtration integrated filtration method can more efficiently remove various suspended solids, thereby optimizing the filtration effect.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical wastewater treatment, and specifically to a wastewater treatment method based on biodegradation of ammonia nitrogen. Background Technique

[0002] The chemical wastewater biodegradation ammonia nitrogen treatment method is a very effective wastewater treatment technology, which mainly uses the life activities of microorganisms to degrade and transform ammonia nitrogen in wastewater, mainly including the anoxic / aerobic method, biofilm method, activated sludge method, plant wetland method and membrane bioreactor. Among them, the anoxic / aerobic method is the most commonly used treatment method, abbreviated as the A / O method, including an anoxic stage and an aerobic stage. In the anoxic stage, chemical wastewater enters the anoxic reactor, where the dissolved oxygen content is relatively low. Under anoxic conditions, denitrifying bacteria in the activated sludge on the anoxic reactor can use the organic matter in the wastewater as an electron donor to reduce nitrate to nitrogen gas, thereby achieving nitrogen removal. The aerobic stage is that the chemical wastewater after anoxic treatment enters the aerobic reactor, where sufficient dissolved oxygen is provided. Nitrifying bacteria in the activated sludge on the aerobic reactor oxidize ammonia nitrogen in the wastewater to nitrite and nitrate. At the same time, the aerobic stage also helps to remove organic matter in the wastewater. Before treatment by the A / O method, suspended solids and large particle impurities must be removed first.

[0003] The existing chemical wastewater filtration methods usually only use a single type of filter screen or filtration equipment to treat particulate impurities of different sizes. However, the impurity particles in chemical wastewater vary in size. Due to the single pore size of the filter screen, large particle substances are likely to block the filter screen, resulting in a decrease in filtration efficiency. When large particle substances block the filter screen, small particle impurities are also difficult to effectively filter. The mixture of large and small particle substances is likely to form an uneven filter cake layer on the filter screen, which not only reduces the filtration speed but also affects the effluent quality and reduces the overall filtration effect.

[0004] In addition, the existing filtration equipment is not convenient for timely transferring the filtered impurity particles, resulting in the accumulation of impurity particles on the filter screen, which will further reduce the filtration speed of the filter screen. Summary of the Invention

[0005] The present invention provides a wastewater treatment method based on biodegradation of ammonia nitrogen, which solves the technical problems that the existing chemical wastewater filtration methods mostly use a single filter screen to treat impurities of different sizes, resulting in large particle substances being easy to block the filter screen, reducing the filtration efficiency. After the large particles block the filter screen, small particles are difficult to filter, the mixture forms an uneven filter cake layer, affecting the effluent quality and speed, and the filtered impurity particles are difficult to transfer in time, resulting in accumulation and further reducing the filter screen efficiency.

[0006] The wastewater treatment method based on biodegradation of ammonia nitrogen provided by the present invention specifically has the following steps for the wastewater treatment method based on biodegradation of ammonia nitrogen:

[0007] S1. Pretreatment of wastewater: The chemical wastewater is first subjected to pretreatment operations through a multi-stage filtration integrated mechanism to remove suspended solids and large particulate matter.

[0008] S2. Anoxic treatment: The chemical wastewater after pretreatment operations enters an anoxic reactor for anoxic treatment. During this process, denitrifying bacteria in the activated sludge on the anoxic reactor reduce nitrate to nitrogen gas.

[0009] S3. Aerobic treatment: The chemical wastewater after anoxic treatment enters an aerobic reactor for aerobic treatment. During this process, nitrifying bacteria in the activated sludge on the aerobic reactor oxidize ammonia nitrogen to nitrite and nitrate.

[0010] S4. Sludge-water sedimentation treatment: The chemical wastewater after aerobic treatment enters a sedimentation tank to perform sludge-water sedimentation treatment on the activated sludge contained in the chemical wastewater.

[0011] S5. Disinfection treatment: The water after sludge-water sedimentation treatment is discharged up to standard after disinfection treatment.

[0012] The steps of the wastewater treatment method based on biodegradation of ammonia nitrogen in the above S1 - S5 steps need to be completed by the cooperation of a treatment table, a multi-stage filtration integrated mechanism, a reciprocating swing part and an intermittent feeding mechanism.

[0013] A multi-stage filtration integrated mechanism for multi-stage classification and filtration of impurity particles with different particle sizes in the wastewater is installed on the upper end surface of the treatment table. A reciprocating swing part for driving the multi-stage filtration integrated mechanism to operate is arranged on the right part of the upper end surface of the treatment table. An intermittent feeding mechanism for intermittently pushing away the impurity particles filtered out by the multi-stage filtration integrated mechanism is jointly arranged between the upper part of the treatment table and the reciprocating swing part. The multi-stage filtration integrated mechanism includes two support plates symmetrically and fixedly connected to the upper end surface of the treatment table on the left and right, two first arc-shaped frames fixedly connected to the upper parts of the opposite sides of the support plates through upper fixing blocks, and two second arc-shaped frames fixedly connected to the lower parts of the opposite sides of the support plates through lower fixing blocks. A first screen cylinder is rotatably connected in the two first arc-shaped frames, and a second screen cylinder sleeved outside the first screen cylinder is rotatably connected in the two second arc-shaped frames. Feeding through grooves are respectively arranged on the upper parts of the first screen cylinder and the second screen cylinder. Touch wall components that abut against the inner wall of the second screen cylinder are symmetrically arranged on the left and right outside the first screen cylinder. The pore diameter of the mesh of the first screen cylinder is larger than the pore diameter of the mesh of the second screen cylinder.

[0014] In a possible implementation, the reciprocating swing part includes a reciprocating motor fixedly connected to the upper end surface of the processing table through a fixed rod. A shaft rod is fixedly connected to the left end of the output shaft of the reciprocating motor. A plurality of first arc-shaped racks are fixedly connected to the outer circumference of the shaft rod at equal intervals through fixed columns. A second arc-shaped rack that cooperates with the first arc-shaped racks is fixedly connected to the lower part of the outer wall of the second screen cylinder. A return spring is fixedly connected between the second arc-shaped frame and the second screen cylinder.

[0015] In a possible implementation, the intermittent feeding mechanism includes a mounting plate fixedly connected to the right part of the upper end surface of the processing table. An upper part of the front end surface of the mounting plate is fixedly connected with a sliding rod. A sliding frame is slidably connected to the outside of the sliding rod. A push rod is slidably connected to the lower end surface of the sliding frame through a connecting telescopic column. A first arc-shaped elastic scraper placed in the first screen cylinder is fixedly connected to the lower end surface of the push rod through a connecting column. A second arc-shaped elastic scraper placed in the second screen cylinder is fixedly connected to the lower end surface of the push rod through a folding rod. A longitudinal movement component for driving the push rod to move longitudinally in a fine-tuning manner is arranged at the front part of the mounting plate. A transverse reciprocating unit for driving the push rod to move horizontally and reciprocally is jointly arranged between the shaft rod and the longitudinal movement component.

[0016] In a possible implementation, the longitudinal movement component includes a chute opened on the front end surface of the mounting plate. A sliding plate is slidably connected in the chute. Two wedge-shaped plates are fixedly connected to the upper end surface of the sliding plate. The two wedge-shaped plates are arranged in a rotationally symmetric manner. A pressure-receiving column for cooperating with the wedge-shaped plates is fixedly connected to the lower end surface of the push rod through a vertical plate.

[0017] In a possible implementation, the transverse reciprocating unit includes a spiral-shaped bar fixedly connected to the outside of the shaft rod. An inverted Y-shaped rod that is slidably connected to the outside of the spiral-shaped bar is fixedly connected to the lower end surface of the sliding plate.

[0018] In a possible implementation, the wall-touching component includes a plurality of notch grooves opened on the outer circumference of the first screen cylinder at equal intervals. A top spring is fixedly connected to the groove wall on one side of the notch groove close to the center of the first screen cylinder. An arc-shaped top plate that touches the inner wall of the second screen cylinder is fixedly connected to the end of the top spring far from the center of the first screen cylinder.

[0019] In a possible implementation, a baffle part is arranged at the end of the first screen cylinder. The baffle part includes a fixed arc-shaped baffle fixedly connected to the right end wall of the first screen cylinder. A movable arc-shaped baffle is hinged to the left end wall of the first screen cylinder through a lug and a torsion spring. A baffle part is also arranged at the end of the second screen cylinder.

[0020] In a possible implementation, a guide plate is fixedly connected to the left part of the upper end surface of the processing table through a support column. The guide plate is arranged longitudinally and is respectively located directly below the left ends of the first screen cylinder and the second screen cylinder. A number of V-shaped material guiding plates are fixedly connected to the circumferential inner walls of the first screen cylinder and the second screen cylinder at equal intervals along the arc direction. A number of rows of the V-shaped material guiding plates are arranged at equal intervals transversely.

[0021] It can be seen from the above technical solutions that the present invention has the following advantages:

[0022] In the present invention, the first screen cylinder and the second screen cylinder, which are sleeved together and have different pore diameters, are combined with each other to classify and filter impurity particles from large to small in sequence. By first filtering out large particle substances, the load of subsequent fine particle filtration can be reduced, the possibility of blockage can be lowered, the load of a single filter screen can be decreased, the efficiency of each filtration stage can be improved, and separately treating large particles and small particles can also more effectively remove suspended substances, thereby improving the quality of the filtered wastewater.

[0023] In the present invention, the integrated filtration method in which classification filtration is carried out simultaneously can more efficiently remove various suspended substances, thereby optimizing the filtration effect, reducing the residence time of water in the treatment system, and being able to process a large amount of wastewater faster.

[0024] In the present invention, during the filtration of wastewater, the intermittent material pushing mechanism operates synchronously, intermittently pushing out the filtered impurities, and timely transferring the filtered particulate matters, which can prevent them from accumulating on the first screen cylinder and the second screen cylinder, reduce the risk of blockage, thereby keeping the filtration system unobstructed, ensuring the water permeability of the surfaces of the first screen cylinder and the second screen cylinder, preventing the filtration efficiency from decreasing, and ensuring the continuous and efficient operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0026] Figure 1 It is a diagram of the wastewater treatment method based on biodegradable ammonia nitrogen provided by the present invention.

[0027] Figure 2 It is a schematic diagram of the overall structure provided by the present invention.

[0028] Figure 3 It is a schematic diagram of the structure of the multi-stage fractional filtration integrated mechanism from the left view angle provided by the present invention.

[0029] Figure 4Schematic diagram of the right view angle structure of the multi-stage fractional filtration integrated mechanism provided by the present invention.

[0030] Figure 5 Schematic diagram of the sectional structure of the multi-stage fractional filtration integrated mechanism provided by the present invention.

[0031] Figure 6 Schematic diagram of the installation structure of the wall-touching component provided by the present invention.

[0032] Figure 7 Schematic diagram of the intermittent feeding mechanism provided by the present invention.

[0033] Figure 8 provided by the present invention Figure 7 Schematic diagram of the enlarged structure of part A in

[0034] Among them, the above-mentioned drawings include the following reference numerals:

[0035] 1. Processing table; 2. Multi-stage fractional filtration integrated mechanism; 21. Support plate; 22. First arc-shaped frame; 23. Second arc-shaped frame; 24. First screen cylinder; 25. Second screen cylinder; 26. Feeding through groove; 27. Wall-touching component; 271. Notch groove; 272. Top spring; 273. Arc-shaped top plate; 3. Reciprocating swing part; 31. Reciprocating motor; 32. Shaft rod; 33. First arc-shaped rack; 34. Second arc-shaped rack; 35. Return spring; 4. Intermittent feeding mechanism; 41. Installation plate; 42. Slide rod; 43. Slide frame; 44. Connecting telescopic column; 45. Push rod; 46. First arc-shaped elastic scraper; 47. Second arc-shaped elastic scraper; 48. Longitudinal movement component; 481. Chute; 482. Slide plate; 483. Wedge plate; 484. Compressed column; 49. Transverse reciprocating unit; 491. Inverted Y-shaped rod; 492. Spiral-shaped dialing strip; 5. Edge blocking part; 51. Fixed arc-shaped baffle; 52. Movable arc-shaped baffle; 6. Guide plate; 7. V-shaped dialing plate. Detailed implementation manners

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention in conjunction with the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0037] Please refer to Figure 1 and Figure 2 , the present invention provides a technical solution: a wastewater treatment method based on biodegradation of ammonia nitrogen. The specific steps of the wastewater treatment method based on biodegradation of ammonia nitrogen are as follows:

[0038] S1. Pretreatment of wastewater: The chemical wastewater is first subjected to pretreatment operations through a multi-stage filtration integrated mechanism 2 to remove suspended solids and large particulate matter.

[0039] S2. Anoxic treatment: The chemical wastewater after pretreatment operations enters an anoxic reactor for anoxic treatment. During this process, denitrifying bacteria in the activated sludge on the anoxic reactor reduce nitrate to nitrogen gas.

[0040] S3. Aerobic treatment: The chemical wastewater after anoxic treatment enters an aerobic reactor for aerobic treatment. During this process, nitrifying bacteria in the activated sludge on the aerobic reactor oxidize ammonia nitrogen to nitrite and nitrate.

[0041] S4. Mud and water sedimentation treatment: The chemical wastewater after aerobic treatment enters a sedimentation tank to perform mud and water sedimentation treatment on the activated sludge contained in the chemical wastewater.

[0042] S5. Disinfection treatment: The water after mud and water sedimentation treatment is discharged up to standard after disinfection treatment.

[0043] The steps of the wastewater treatment method based on biodegradation of ammonia nitrogen in the above S1 - S5 steps need to be completed by the cooperation of a treatment table 1, a multi-stage filtration integrated mechanism 2, a reciprocating swing part 3 and an intermittent feeding mechanism 4.

[0044] On the upper end surface of the treatment table 1, a multi-stage filtration integrated mechanism 2 for multi-stage classification and filtration of impurity particles with different particle sizes in the wastewater is installed. On the right part of the upper end surface of the treatment table 1, a reciprocating swing part 3 for driving the multi-stage filtration integrated mechanism 2 to operate is arranged. Between the upper part of the treatment table 1 and the reciprocating swing part 3, an intermittent feeding mechanism 4 for intermittently pushing away the impurity particles filtered out by the multi-stage filtration integrated mechanism 2 is jointly arranged.

[0045] Please refer to Figure 2 、 Figure 3 、 Figure 4 and Figure 5 In this embodiment, the multi-stage filtration integrated mechanism 2 includes two support plates 21 symmetrically and fixedly connected to the upper end surface of the treatment table 1 on the left and right, two first arc-shaped frames 22 fixedly connected to the upper parts of the opposite sides of the support plates 21 through upper fixing blocks, and two second arc-shaped frames 23 fixedly connected to the lower parts of the opposite sides of the support plates 21 through lower fixing blocks. A first screen cylinder 24 is jointly rotatably connected in the two first arc-shaped frames 22. A second screen cylinder 25 sleeved outside the first screen cylinder 24 is jointly rotatably connected in the two second arc-shaped frames 23. Feeding through grooves 26 are respectively arranged on the upper parts of the first screen cylinder 24 and the second screen cylinder 25. Touch wall components 27 are symmetrically arranged on the left and right outside the first screen cylinder 24 and abut against the inner wall of the second screen cylinder 25. The pore diameter of the first screen cylinder 24 is larger than the pore diameter of the second screen cylinder 25.

[0046] Please refer toFigure 3 , Figure 4 and Figure 5 , on the left part of the upper end face of the processing table 1, a material guiding plate 6 arranged longitudinally and respectively located directly below the left ends of the first screen cylinder 24 and the second screen cylinder 25 is fixedly connected through a support column. A number of V-shaped material guiding plates 7 are fixedly connected to the inner circumferential wall of the first screen cylinder 24 and the second screen cylinder 25 at equal intervals along the arc direction, and a number of rows of V-shaped material guiding plates 7 are arranged at equal intervals transversely.

[0047] Please refer to Figure 4 and Figure 6 , the wall contact assembly 27 includes a number of notch grooves 271 equally spaced on the outer circumferential wall of the first screen cylinder 24. A top spring 272 is fixedly connected to the side wall of the notch groove 271 close to the center of the first screen cylinder 24. One end of the top spring 272 away from the center of the first screen cylinder 24 is fixedly connected to an arc-shaped top plate 273 that abuts against the inner wall of the second screen cylinder 25. The arc-shaped top plate 273 is pushed by the top spring 272 to tightly abut against the inner wall of the second screen cylinder 25 to increase the friction between the first screen cylinder 24 and the second screen cylinder 25, so as to facilitate driving the first screen cylinder 24 to rotate synchronously when the second screen cylinder 25 rotates, and prevent the situation of sliding misalignment between the second screen cylinder 25 and the first screen cylinder 24.

[0048] Please refer to Figure 2 , Figure 4 and Figure 5 , a retaining edge part 5 is arranged at the end of the first screen cylinder 24. The retaining edge part 5 includes a fixed arc-shaped baffle 51 fixedly connected to the right end wall of the first screen cylinder 24. A movable arc-shaped baffle 52 is hinged to the left end wall of the first screen cylinder 24 through a lug and a torsion spring. A retaining edge part 5 is also arranged at the end of the second screen cylinder 25. The fixed arc-shaped baffle 51 and the movable arc-shaped baffle 52 respectively placed on the sides of the first screen cylinder 24 and the second screen cylinder 25 play a role in blocking the filtered impurity particles, and prevent the filtered impurities from flowing out from the sides of the first screen cylinder 24 and the second screen cylinder 25.

[0049] The chemical industrial wastewater is introduced into the feed trough 26. Then, the reciprocating swing part 3 is controlled to operate, driving the second screen cylinder 25 to swing reciprocally. Subsequently, the second screen cylinder 25 drives the first screen cylinder 24 to swing reciprocally through the arc-shaped top plate 273 that touches its inner wall. The chemical industrial wastewater entering the first screen cylinder 24 is filtered to remove large-particle impurities. The small-particle impurities filtered out then pass through the first screen cylinder 24 along with the wastewater and enter the second screen cylinder 25. Then, the second screen cylinder 25 further filters the wastewater to filter out the small-particle impurities, and the filtered small-particle impurities will stay on the inner wall of the second screen cylinder 25. While the first screen cylinder 24 and the second screen cylinder 25 swing reciprocally, they also drive the V-shaped material deflectors 7 installed on their respective inner walls to swing synchronously. The reciprocally swinging V-shaped material deflectors 7 are used to deflect the filtered impurity particles to reciprocally gather and disperse in the horizontal direction, so as to evenly spread the impurity particles on the inner walls of the first screen cylinder 24 and the second screen cylinder 25, avoiding the accumulation of impurity particles in some areas being too thick and affecting the normal filtration speed, and ensuring the normal filtration capacity of each area of the first screen cylinder 24 and the second screen cylinder 25. The filtered wastewater then flows out from the second screen cylinder 25, thus respectively completing the filtration of large-particle impurities and small-particle impurities.

[0050] Particles of different sizes are separately processed in the hierarchical filtration, which can reduce the load on a single filter screen and improve the efficiency of each filtration stage. The large and small particles are successively filtered out, making the filtration of fine particles more efficient. The hierarchical treatment can more effectively remove various suspended solids, making the effluent clearer and meeting higher water quality standards. The hierarchical integrated filtration method can more efficiently remove various suspended substances, thus optimizing the filtration effect.

[0051] Please refer to Figure 2 and Figure 4 In this embodiment, the reciprocating swing part 3 includes a reciprocating motor 31 fixedly connected to the upper end surface of the treatment table 1 through a fixed rod. The left end of the output shaft of the reciprocating motor 31 is fixedly connected with a shaft rod 32. A plurality of first arc-shaped racks 33 are equidistantly fixedly connected to the circumferential outer wall of the shaft rod 32 through fixed columns. A second arc-shaped rack 34 that cooperates with the first arc-shaped racks 33 is fixedly connected to the lower part of the outer surface wall of the second screen cylinder 25. A return spring 35 is fixedly connected between the second arc-shaped frame 23 and the second screen cylinder 25.

[0052] The reciprocating motor 31 is controlled to operate to drive the shaft 32 to rotate reciprocally. The shaft 32 then drives the first arc-shaped rack 33 to rotate. When the first arc-shaped rack 33 meshes with the second arc-shaped rack 34 during rotation, it drives the second screen cylinder 25 to rotate. After the second screen cylinder 25 rotates, it drives the return spring 35 to deform. When the first arc-shaped rack 33 that meshes with the second arc-shaped rack 34 rotates to separate from the second arc-shaped rack 34, the return spring 35 resets and drives the second screen cylinder 25 to rotate in the reverse direction. When the first arc-shaped rack 33 and the second arc-shaped rack 34 mesh again, the second screen cylinder 25 will be driven to rotate in the other direction again. By continuously repeating the steps of meshing and separating between the circumferentially arranged first arc-shaped rack 33 and the second arc-shaped rack 34, the second screen cylinder 25 rotates reciprocally, and then the second screen cylinder 25 drives the first screen cylinder 24 to swing reciprocally.

[0053] Please refer to Figure 2 and Figure 7 In this embodiment, the intermittent feeding mechanism 4 includes a mounting plate 41 fixedly connected to the right part of the upper end surface of the processing table 1. The upper part of the front end surface of the mounting plate 41 is fixedly connected with a slide bar 42. A slide frame 43 is slidably connected to the outside of the slide bar 42, and the slide frame 43 and the slide bar 42 are in sliding friction fit (that is, there is a certain frictional resistance between the slide bar 42 and the slide frame 43, but relative movement is still allowed). The lower end surface of the slide frame 43 is slidably connected with a push rod 45 through a connecting telescopic column 44. The lower end surface of the push rod 45 is fixedly connected with a first arc-shaped elastic scraper 46 placed in the first screen cylinder 24 through a connecting column. The lower end surface of the push rod 45 is fixedly connected with a second arc-shaped elastic scraper 47 placed in the second screen cylinder 25 through a folding rod. A longitudinal movement component 48 for driving the push rod 45 to move longitudinally in a fine-tuning manner is arranged at the front part of the mounting plate 41. A transverse reciprocating unit 49 for driving the push rod 45 to move transversely and reciprocally is jointly arranged between the shaft 32 and the longitudinal movement component 48.

[0054] Please refer to Figure 7 and Figure 8 As shown in and, the longitudinal movement component 48 includes a chute 481 opened on the front end surface of the mounting plate 41. A slide plate 482 is slidably connected in the chute 481. Two wedge-shaped plates 483 are fixedly connected to the upper end surface of the slide plate 482. The two wedge-shaped plates 483 are arranged in a rotationally symmetric manner. The lower end surface of the push rod 45 is fixedly connected with a pressure-receiving column 484 for cooperating with the wedge-shaped plates 483 through a vertical plate. The transverse reciprocating unit 49 includes a spiral strip 492 fixedly connected to the outside of the shaft 32. The lower end surface of the slide plate 482 is fixedly connected with an inverted Y-shaped rod 491 slidably connected to the outside of the spiral strip 492.

[0055] While the shaft rod 32 is rotating, it also drives the intermittent feeding mechanism 4 to operate. When the shaft rod 32 rotates in one direction: the spiral strip 492 is driven to rotate synchronously. The rotation of the spiral strip 492 drives the inverted Y-shaped rod 491 to move to the right. The inverted Y-shaped rod 491 then drives the slide plate 482 to move to the right. The slide plate 482 then drives the wedge-shaped plate 483 to move to the right. The wedge-shaped plate 483 located on the left is driven to move to the right and contact the pressure-receiving column 484. The inclined surface of the wedge-shaped plate 483 on the left squeezes the pressure-receiving column 484, causing the pressure-receiving column 484 to move upward. The pressure-receiving column 484 then drives the push rod 45 to move upward through the vertical plate. The push rod 45 then drives the first arc-shaped elastic scraper 46 and the second arc-shaped elastic scraper 47 to move upward through the connecting column and the folded rod until the push rod 45 moves upward and pushes the connecting telescopic column 44 to be compressed to the shortest length, and the push rod 45 also moves to the highest position. At this time, the first arc-shaped elastic scraper 46 and the second arc-shaped elastic scraper 47 are respectively directly above the bottom of the lower cavity of the first screen cylinder 24 and the second screen cylinder 25. Then, the wedge-shaped plate 483 located on the left drives the push rod 45 to move to the right by touching the pressure-receiving column 484. The push rod 45 then drives the first arc-shaped elastic scraper 46 and the second arc-shaped elastic scraper 47 to move to the right synchronously until the first arc-shaped elastic scraper 46 is driven to move to a position close to the right port of the first screen cylinder 24 and then stops moving to the right.

[0056] Then, when the shaft rod 32 starts to change its orientation and rotate in the other direction: the spiral strip 492 is driven to rotate synchronously in the opposite direction to the above. The rotation of the spiral strip 492 drives the inverted Y-shaped rod 491 to start moving to the left. The inverted Y-shaped rod 491 then drives the slide plate 482 to move to the left. During the leftward movement of the slide plate 482, it will also drive the wedge-shaped plate 483 located on the right to move to the left and contact the pressure-receiving column 484. Then, during the leftward movement of the wedge-shaped plate 483 located on the right, its inclined surface will squeeze the pressure-receiving column 484, causing the pressure-receiving column 484 to move downward. The pressure-receiving column 484 then drives the push rod 45 to move downward through the vertical plate. The push rod 45 then drives the first arc-shaped elastic scraper 46 and the second arc-shaped elastic scraper 47 to move downward through the connecting column and the folded plate until the first arc-shaped elastic scraper 46 and the second arc-shaped elastic scraper 47 move downward to respectively contact the inner walls of the first screen cylinder 24 and the second screen cylinder 25. At this time, the push rod 45 moves downward and pulls the connecting telescopic column 44 to extend to the longest length.

[0057] Subsequently, the wedge-shaped plate 483 located on the right presses against the pressure-bearing column 484 and moves it to the left. The pressure-bearing column 484 then drives the push rod 45 to move to the left. The push rod 45 then drives the first arc-shaped elastic scraper 46 and the second arc-shaped elastic scraper 47 to move to the left. During the leftward movement of the first arc-shaped elastic scraper 46 and the second arc-shaped elastic scraper 47, the large-particle impurities in the inner cavity of the first screen cylinder 24 and the small-particle impurities in the second screen cylinder 25 that are scraped to the left flow. The scraped impurities then respectively push the moving arc-shaped baffles 52 located on the left of the first screen cylinder 24 and the second screen cylinder 25 to rotate, and push the filtered impurities into the guide plate 6. The impurities then flow downward along the inclined surface of the guide plate 6.

[0058] After the impurity particles in the first screen cylinder 24 and the second screen cylinder 25 are completely pushed out, the shaft rod 32 reverses again and indirectly drives the push rod 45 to move to the right. The two moving arc-shaped baffles 52 then start to reset and rotate respectively against the left end walls of the first screen cylinder 24 and the second screen cylinder 25. Then, the first arc-shaped elastic scraper 46 and the second arc-shaped elastic scraper 47 start to repeat the previous steps again. After moving up a certain distance first, they start to move horizontally to the right. Thus, the filtered impurity particles can be automatically pushed out intermittently, and the filtered particulate matter can be removed in time, which can prevent them from accumulating on the first screen cylinder 24 and the second screen cylinder 25, reduce the risk of filter clogging, thereby maintaining the smoothness of the filtration system, ensuring the water permeability of the filter screen surface, preventing the filtration efficiency from decreasing, and ensuring that the system can operate continuously and efficiently.

[0059] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0060] In addition, the terms "first", "second", "first one", "second one" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "first one", "second one" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0061] In the present invention, unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A wastewater treatment method based on biodegradable ammonia nitrogen, characterized in that: The steps are as follows: S1. Pretreatment of wastewater: The chemical wastewater is first subjected to pretreatment operations through a multi-stage filtration integrated mechanism to remove suspended solids; S2. Anoxic treatment: The chemical wastewater after the pretreatment operation enters an anoxic reactor for anoxic treatment. During this process, denitrifying bacteria in the activated sludge on the anoxic reactor reduce nitrate to nitrogen; S3. Aerobic treatment: The chemical wastewater after the anoxic treatment enters an aerobic reactor for aerobic treatment. During this process, nitrifying bacteria in the activated sludge on the aerobic reactor oxidize ammonia nitrogen to nitrite and nitrate; S4. Sludge-water sedimentation treatment: The chemical wastewater after the aerobic treatment enters a sedimentation tank to perform sludge-water sedimentation treatment on the activated sludge contained in the chemical wastewater; S5. Disinfection treatment: The water after the sludge-water sedimentation treatment is discharged up to standard after disinfection treatment; The wastewater treatment method based on biodegradation of ammonia nitrogen is completed by the cooperation of a treatment table, a multi-stage filtration integrated mechanism, a reciprocating swing part and an intermittent feeding mechanism; among them: a multi-stage filtration integrated mechanism for performing multi-stage classification filtration on impurity particles of different particle sizes in the wastewater is installed on the upper end surface of the treatment table, a reciprocating swing part for driving the multi-stage filtration integrated mechanism to operate is arranged on the right part of the upper end surface of the treatment table, and an intermittent feeding mechanism for intermittently pushing away the impurity particles filtered out by the multi-stage filtration integrated mechanism is jointly arranged between the upper part of the treatment table and the reciprocating swing part; The multi-stage filtration integrated mechanism includes: two support plates symmetrically and fixedly connected to the upper end surface of the treatment table on the left and right, two first arc-shaped frames fixedly connected to the upper parts of the opposite sides of the support plates through upper fixing blocks, and two second arc-shaped frames fixedly connected to the lower parts of the opposite sides of the support plates through lower fixing blocks. A first screen cylinder is rotatably connected in the two first arc-shaped frames, a second screen cylinder sleeved outside the first screen cylinder is rotatably connected in the two second arc-shaped frames, and feeding through grooves are respectively arranged on the upper parts of the first screen cylinder and the second screen cylinder; Touch wall components are symmetrically arranged on the left and right outside the first screen cylinder and are in contact with the inner wall of the second screen cylinder. The pore diameter of the mesh of the first screen cylinder is larger than the pore diameter of the mesh of the second screen cylinder; The touch wall component includes a plurality of notch grooves equidistantly arranged on the circumferential outer wall of the first screen cylinder. A top spring is fixedly connected to the groove wall on one side of the notch groove close to the center of the first screen cylinder, and an arc-shaped top plate in contact with the inner wall of the second screen cylinder is fixedly connected to the end of the top spring far from the center of the first screen cylinder; A baffle part is arranged at the end of the first screen cylinder. The baffle part includes a fixed arc-shaped baffle fixedly connected to the right end wall of the first screen cylinder. The left end wall of the first screen cylinder is hinged with a movable arc-shaped baffle through a lug and a torsion spring. A baffle part is also arranged at the end of the second screen cylinder; A guide plate arranged longitudinally and respectively located directly below the left ends of the first screen cylinder and the second screen cylinder is fixedly connected to the left part of the upper end surface of the treatment table through a support column. A plurality of V-shaped feeding plates are fixedly connected to the circumferential inner walls of the first screen cylinder and the second screen cylinder at equal intervals along the arc direction. There are several rows of V-shaped feeding plates arranged at equal intervals; The reciprocating swing part includes a reciprocating motor fixedly connected to the upper end surface of the treatment table through a fixing rod.

2. The wastewater treatment method based on biodegradable ammonia nitrogen according to claim 1, characterized in that: The left end of the output shaft of the reciprocating motor is fixedly connected with a shaft rod. A plurality of first arc-shaped racks are equidistantly fixedly connected to the circumferential outer wall of the shaft rod through fixing columns. A second arc-shaped rack that cooperates with the first arc-shaped rack is fixedly connected to the lower part of the outer surface of the second screen cylinder. A return spring is fixedly connected between the second arc-shaped frame and the second screen cylinder.

3. A wastewater treatment method based on biodegradable ammonia nitrogen according to claim 2, characterized in that: The intermittent feeding mechanism includes a mounting plate fixedly connected to the right part of the upper end surface of the processing table. The upper part of the front end surface of the mounting plate is fixedly connected with a sliding rod. A sliding frame is slidably connected to the outside of the sliding rod. The lower end surface of the sliding frame is slidably connected with a push rod through a connecting telescopic column. The lower end surface of the push rod is fixedly connected with a first arc-shaped elastic scraper placed in the first screen cylinder through a connecting column. The lower end surface of the push rod is fixedly connected with a second arc-shaped elastic scraper placed in the second screen cylinder through a folded rod. A longitudinal movement component for driving the push rod to move longitudinally in a fine-tuning manner is arranged at the front part of the mounting plate. A transverse reciprocating unit for driving the push rod to move horizontally back and forth is arranged between the shaft rod and the longitudinal movement component.

4. A wastewater treatment method based on biodegradable ammonia nitrogen according to claim 3, characterized in that: The longitudinal movement component includes a chute opened on the front end surface of the mounting plate. A sliding plate is slidably connected in the chute. The upper end surface of the sliding plate is fixedly connected with two wedge-shaped plates. The two wedge-shaped plates are arranged in a rotationally symmetric manner. The lower end surface of the push rod is fixedly connected with a pressure-receiving column for cooperating with the wedge-shaped plates through a vertical plate.

5. The wastewater treatment method based on biodegradable ammonia nitrogen according to claim 4, characterized in that: The transverse reciprocating unit includes a spiral-shaped dial strip fixedly connected to the outside of the shaft rod. The lower end surface of the sliding plate is fixedly connected with an inverted Y-shaped rod slidably connected to the outside of the spiral-shaped dial strip.

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