A deep bed denitrification filter for water treatment

Abstract

The present application provides a water treatment deep bed denitrification filter tank, which relates to the field of sewage treatment, including a tank body, wherein a quick mixing zone, a magnetic flocculation zone and a sedimentation zone are arranged inside the tank body, and further including: a mixing and stirring mechanism, which is arranged in the quick mixing zone for quickly mixing the water quality in the quick mixing zone; a flocculation stirring mechanism, which is arranged in the magnetic flocculation zone for mixing the water quality and flocculant in the magnetic flocculation zone; and a flow guide structure, which is arranged at the bottom of the magnetic flocculation zone and arranged around the flocculation stirring mechanism. The mixing and stirring mechanism of the present application can preliminarily mix the water quality, so as to facilitate better mixing with the water quality when the flocculant is added. After the flocculant is added, the second motor drives the second stirring shaft to move, thereby driving the impeller to move. The impeller stirs the water flow to form suction, thereby promoting the water flow to move upward along the flow guide structure, first aggregating toward the center in the flow guide structure and then diffusing toward the periphery. This flow mode can effectively promote more complete mixing of the flocculant and the water quality.

Description

Technical Field

[0001] The invention relates to the field of sewage treatment, and in particular to a deep bed denitrification filter tank for water treatment. Background Art

[0002] The high-efficiency sedimentation tank system is a high-efficiency external reflux solid particle contact sedimentation tank. By adding coagulants to the water, the colloids and suspended matter in the raw water are destabilized to form flocs, and then under appropriate hydraulic conditions, the high-molecular coagulant and crystal nuclei (return sludge, micro-sand or magnetic powder) work together to form dense and easy-to-sediment flocs. The flocs settle quickly in the sedimentation area, and the supernatant captures fine particles through the inclined tube area to produce high-quality effluent. Compared with traditional processes, high-efficiency sedimentation tanks have higher sedimentation efficiency, better effluent water quality, and smaller footprint.

[0003] However, in actual use, it is found that when adding flocculants to traditional sedimentation tanks, due to the lack of diversion structure, the flocculants are difficult to fully mix with the water, or a long period of stirring is required to achieve the mixing degree of the flocculants and the water, which will affect the sedimentation efficiency of the entire water quality. For this reason, we provide a deep bed denitrification filter for water treatment. Summary of the invention

[0004] The purpose of the present invention is to provide a water treatment deep bed denitrification filter tank, which can more quickly and efficiently mix water to complete the precipitation of water and the cleaning of precipitated sludge.

[0005] The specific application is as follows:

[0006] The invention comprises a tank body, wherein a quick mixing zone, a magnetic flocculation zone and a sedimentation zone are arranged inside the tank body, and further comprises:

[0007] A mixing and stirring mechanism is arranged in the fast mixing zone and is used to quickly mix the water in the fast mixing zone;

[0008] A flocculation stirring mechanism is arranged in the magnetic flocculation area and is used to mix the water and flocculant in the magnetic flocculation area;

[0009] A flow guiding structure, arranged at the bottom of the magnetic flocculation zone and around the flocculation stirring mechanism, for circulating water in the magnetic flocculation zone;

[0010] A sludge scraping mechanism is arranged in the sedimentation area and is used to scrape away the sludge deposited in the sedimentation area;

[0011] A drainage pipe is fixedly connected to the water outlet of the sedimentation area and is used to discharge the water filtered in the sedimentation area;

[0012] The honeycomb filter plate is connected to the upper part of the inner wall of the sedimentation zone and arranged below the water outlet;

[0013] The gas explosion component is connected to the outside of the pool body, and its output end is respectively connected to the mixing and stirring mechanism and the mud scraping mechanism.

[0014] As a preferred technical solution of the present application, the mixing and stirring mechanism includes a motor 1, the output end of the motor 1 is connected to a stirring shaft 1 through a gear box, the outer wall of the stirring shaft 1 is fixedly connected to a stirring blade 1, and the stirring shaft 1 is a hollow shaft.

[0015] As a preferred technical solution of the present application, the gas explosion component includes an air pump fixedly connected to the pool body through a bracket, the output end of the air pump is connected to a diverter valve through a connecting pipe, the outer wall of the diverter valve is connected to two hoses, one end of the hose is fixedly connected to a sleeve, and the sleeve is connected to a stirring shaft through a sealed bearing.

[0016] As a preferred technical solution of the present application, the flocculation and stirring mechanism includes a motor 2, the output end of the motor 2 is connected to a stirring shaft 2 through a gear box, the bottom end of the stirring shaft 2 is fixedly connected to an impeller, and the impeller is used to generate suction to make the water flow move along a predetermined trajectory of the guide structure.

[0017] As a preferred technical solution of the present application, the flow guide structure includes a flow guide cover fixedly connected to the bottom wall of the magnetic flocculation area, a through groove is provided at the bottom of the side wall of the flow guide cover, the middle part of the flow guide cover is funnel-shaped, and a diverter plate is provided on the top of the flow guide cover, and the diverter plate divides the top of the flow guide cover into a plurality of identical water flow channels;

[0018] The diverter plate is a curved plate, and when water flows in the diverter plate, the flow direction will change and flow from the center to the periphery.

[0019] As a preferred technical solution of the present application, a sludge pump is provided on the side wall of the tank body, the input end of the sludge pump is connected to the bottom of the sedimentation zone, the longitudinal section of the sedimentation zone is U-shaped, and the fast mixing zone, magnetic flocculation zone and sedimentation zone can be connected by a water pump.

[0020] As a preferred technical solution of the present application, the scraping mechanism includes a motor three, the output end of the motor three is fixedly connected to a stirring shaft three, the bottom of the stirring shaft three is connected to a support rod, the bottom of the support rod is connected to a scraping rod, the outer wall of the scraping rod is hinged with a scraping assembly, and an elastic structure is arranged between the scraping assembly and the scraping rod.

[0021] As a preferred technical solution of the present application, the scraper assembly includes an arc-shaped retaining frame, which is slidably installed at the bottom of the scraper rod. The two ends of the arc-shaped retaining frame are detachably connected with scraper one and scraper two by bolt one, and scraper one is connected to the scraper rod through a hose.

[0022] As a preferred technical solution of the present application, the middle part of the scraper blade 1 is a hollow structure and a plurality of aeration holes are provided on the outer wall of the scraper blade 1. The aeration holes are arranged on the scraper blade 1 with openings tilted downward. When the scraper rod rotates clockwise, the height of the scraper blade 1 is less than the height of the scraper blade 2. When the scraper rod rotates counterclockwise, the height of the scraper blade 1 is greater than the height of the scraper blade 2.

[0023] Wherein, the height when the scraper plate 1 is located at the bottom is smaller than the height when the scraper plate 2 is located at the bottom.

[0024] As a preferred technical solution of the present application, the elastic structure is a U-shaped mild steel bracket, the top of the arc-shaped retaining frame is hinged to the mud scraper rod through a connecting rod, and the hinge point of the connecting rod and the center of the arc-shaped retaining frame are the same axis core.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] In the scheme of this application:

[0027] 1. Through the arrangement of the mixing and stirring mechanism, the gas explosion component, the flocculation and stirring mechanism and the guide structure, the mixing and stirring mechanism can preliminarily mix the water quality, so as to facilitate better mixing with the water quality when the flocculant is added. After the flocculant is added, the second motor drives the stirring shaft second to move, thereby driving the impeller to move. The impeller stirs the water flow to form suction, thereby promoting the water flow to move upward along the guide structure, first aggregate toward the center in the guide structure and then diffuse toward the peripheral side. This flow mode can effectively promote more complete mixing of the flocculant and the water quality;

[0028] 2. Through the arrangement of the scraping mechanism and the gas explosion component, after sedimentation, the motor three can be started to drive the stirring shaft three and the support rod to move. The scraping assembly at the bottom of the support rod can scrape the sludge in the sedimentation area. When the motor three rotates counterclockwise, the scraper one scrapes the upper layer of the sludge. At the same time, the air flow can be input through the gas explosion component to break up the lower layer of sludge for easy scraping. When the motor three rotates clockwise, the scraper two is subjected to resistance and approaches the scraping rod. At this time, the scraper one is lifted, and the scraper two scrapes the lower layer of sludge. Whether it rotates clockwise or counterclockwise, the other scraper will not be affected, thereby achieving the purpose of layered scraping and effectively reducing the resistance of scraping. It is not only easier to remove the sludge but also reduces the damage to parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the three-dimensional structure of a deep-bed denitrification filter tank for water treatment provided in this application;

[0030] Figure 2 A schematic diagram of the structure of a deep bed denitrification filter for water treatment provided in this application from a second perspective;

[0031] Figure 3A schematic diagram of the structure of a mixing and stirring mechanism of a deep bed denitrification filter for water treatment provided in this application;

[0032] Figure 4 A schematic diagram of the structure of a flocculation and stirring mechanism of a deep-bed denitrification filter tank for water treatment provided in this application;

[0033] Figure 5 A schematic diagram of a flow diversion structure in a deep bed denitrification filter tank for water treatment provided in this application;

[0034] Figure 6 A schematic diagram of the structure of a sludge scraping mechanism in a deep bed denitrification filter tank for water treatment provided in this application;

[0035] Figure 7 A water treatment deep bed denitrification filter provided in this application Figure 6 Schematic diagram of the main structure;

[0036] Figure 8 A schematic diagram of the structure of a sludge scraping assembly in a deep bed denitrification filter tank for water treatment provided in this application;

[0037] Fig. 9 A schematic diagram of the movement state of a sludge scraping assembly in a deep bed denitrification filter tank for water treatment provided in this application;

[0038] Fig.10 A schematic diagram of the assembly structure of a shaft sleeve and a stirring shaft in a deep-bed denitrification filter for water treatment provided in the present application.

[0039] Indicated in the figure:

[0040] 1. Tank body; 11. Fast mixing zone; 12. Magnetic flocculation zone; 13. Sedimentation zone; 14. Water outlet; 15. Sludge pump;

[0041] 2. Mixing and stirring mechanism; 21. Motor one; 22. Stirring shaft one; 23. Stirring blade one;

[0042] 3. Flocculation stirring mechanism; 31. Motor 2; 32. Stirring shaft 2; 33. Impeller;

[0043] 4. flow guide structure; 41. flow guide cover; 42. through slot; 43. flow divider plate;

[0044] 5. Mud scraping mechanism; 51. Motor three; 52. Stirring shaft three; 53. Support rod; 54. Mud scraping rod; 55. Arc retainer; 56. Bolt one; 57. Scraper one; 58. Scraper two; 59. Aeration hole; 510. Connecting rod;

[0045] 6. Drain pipe;

[0046] 7. Honeycomb filter plate;

[0047] 8. Gas explosion components; 81. Air pump; 82. Diverter valve; 83. Hose; 84. Bushing. DETAILED DESCRIPTION

[0048] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0049] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0050] See also Figures 1 to 10 The present invention provides a technical solution: a water treatment deep bed denitrification filter, comprising a tank body 1, wherein the interior of the tank body 1 is provided with a fast mixing zone 11, a magnetic flocculation zone 12 and a sedimentation zone 13, and further comprising:

[0051] The mixing and stirring mechanism 2 is arranged in the fast mixing zone 11 and is used for quickly mixing the water in the fast mixing zone 11;

[0052] The flocculation stirring mechanism 3 is arranged in the magnetic flocculation area 12 and is used for mixing the water and the flocculant in the magnetic flocculation area 12;

[0053] The flow guiding structure 4 is arranged at the bottom of the magnetic flocculation area 12 and around the flocculation stirring mechanism 3, and is used for the circulation of water in the magnetic flocculation area 12;

[0054] The sludge scraping mechanism 5 is arranged in the sedimentation area 13 and is used to scrape away the sludge deposited in the sedimentation area 13;

[0055] The drain pipe 6 is fixedly connected to the water outlet 14 of the sedimentation area 13 and is used to discharge the water filtered by the sedimentation area 13. There are three drain pipes 6, and an opening and closing valve is provided at the end of each drain pipe 6 to open and close the drain pipe 6;

[0056] The honeycomb filter plate 7 is connected to the upper part of the inner wall of the sedimentation area 13 and arranged below the water outlet 14. There are multiple honeycomb filter plates 7, and the multiple honeycomb filter plates 7 are tightly arranged in the sedimentation area 13. The sewage is filtered below the honeycomb filter plate 7, and the filtered pure water flows to the top of the honeycomb filter plate 7.

[0057] The gas explosion component 8 is connected to the outside of the tank body 1, and its output end is connected to the mixing and stirring mechanism 2 and the mud scraping mechanism 5 respectively.

[0058] As a preferred embodiment, on the basis of the above method, further, the mixing and stirring mechanism 2 includes a motor 21, the output end of the motor 21 is connected to a stirring shaft 22 through a gear box, the outer wall of the stirring shaft 22 is fixedly connected to a stirring blade 23, the stirring shaft 22 is a hollow shaft, and the motor 21 is started, the motor 21 drives the gear box and then drives the stirring shaft 22 to move, and when the stirring shaft 22 moves, it drives the stirring blade 23 to move, and the stirring blade 23 stirs the water so that impurities in the water are evenly dispersed in the water.

[0059] As a preferred embodiment, on the basis of the above-mentioned method, further, the flocculation stirring mechanism 3 includes a motor 2 31, the output end of the motor 2 31 is connected to the stirring shaft 2 32 through a gear box, the bottom end of the stirring shaft 2 32 is fixedly connected to the impeller 33, the impeller 33 is used to generate suction to make the water flow move along the predetermined trajectory of the guide structure 4, start the motor 2 31, the motor 2 31 works to drive the stirring shaft 2 32 to work, the stirring shaft 2 32 drives the impeller 33 to rotate, thereby driving the water to flow.

[0060] The flow guide structure 4 includes a flow guide cover 41 fixedly connected to the bottom wall of the magnetic flocculation area 12, a through groove 42 is provided at the bottom of the side wall of the flow guide cover 41, the middle part of the flow guide cover 41 is funnel-shaped, and a diverter plate 43 is provided on the top of the flow guide cover 41, and the diverter plate 43 divides the top of the flow guide cover 41 into a plurality of identical water flow channels;

[0061] The diverter plate 43 is a curved plate. When water flows in the diverter plate 43 , the flow direction will change and flow from the center to the periphery.

[0062] As a preferred embodiment, on the basis of the above-mentioned method, further, the scraper mechanism 5 includes a motor 3 51, the output end of the motor 3 51 is fixedly connected to the stirring shaft 3 52, the bottom of the stirring shaft 3 52 is connected to the support rod 53, the bottom of the support rod 53 is connected to the scraper rod 54, the outer wall of the scraper rod 54 is hinged with a scraper assembly, and an elastic structure is arranged between the scraper assembly and the scraper rod 54. When the motor 3 51 is driven to work, the stirring shaft 3 52 can be driven to rotate, and the stirring shaft 3 52 drives the support rod 53 to move, thereby driving the scraper rod 54 and the scraper assembly to scrape the sludge deposited in the sedimentation area 13, and the number of the scraper rods 54 is several.

[0063] The scraper assembly includes an arc-shaped retaining frame 55, which is slidably installed at the bottom of the scraper rod 54. The two ends of the arc-shaped retaining frame 55 are detachably connected with a scraper 1 57 and a scraper 2 58 by bolts 1 56. Scraper 1 57 is connected to the scraper rod 54 through a hose, and scraper 1 57 and scraper 2 58 are connected by bolts 1 56, so as to facilitate the disassembly and replacement of scraper 1 57 and scraper 2 58.

[0064] The middle part of the scraper 1 57 is a hollow structure and a plurality of aeration holes 59 are provided on the outer wall of the scraper 1 57. The aeration holes 59 are arranged on the scraper 1 57 with the openings tilted downward. When the scraper rod 54 rotates clockwise, the height of the scraper 1 57 is less than the height of the scraper 2 58. When the scraper rod 54 rotates counterclockwise, the height of the scraper 1 57 is greater than the height of the scraper 2 58.

[0065] Among them, when the scraper 1 57 is at the bottom, the height is smaller than the height when the scraper 2 58 is at the bottom. By supplying high-pressure gas to the scraper 1 57, the gas is discharged through the aeration hole 59 to flush the sludge, thereby facilitating the scraping of the sludge in the later stage. When rotating counterclockwise, the upper layer of sludge can be scraped off first, and when rotating clockwise, the lower layer of sludge can be scraped off. The advantage of layered scraping is that it can reduce resistance, which is not only easy to scrape but also will not damage the scraper and other components.

[0066] The elastic structure is a U-shaped mild steel bracket. The top of the arc-shaped retainer 55 is hinged to the mud scraper rod 54 through a connecting rod 510. The hinge point of the connecting rod 510 and the center of the arc-shaped retainer 55 are the same axis.

[0067] As a preferred embodiment, on the basis of the above-mentioned method, further, the gas explosion component 8 includes an air pump 81 fixedly connected to the pool body 1 through a bracket, the output end of the air pump 81 is connected to the diverter valve 82 through a connecting pipe, the outer wall of the diverter valve 82 is connected to two hoses 83, one end of the hose 83 is fixedly connected to a sleeve 84, the sleeve 84 is connected to the stirring shaft 22 through a sealed bearing, the air pump 81 inhales gas when it works, and transports it to the two hoses 83 through the diverter valve 82, and then injects it into the sleeve 84, and further injects it into the stirring shaft 22. The number of the sleeves 84 is two, one of which is connected to the stirring shaft 22, and the other is connected to the stirring shaft 3 52.

[0068] A sludge pump 15 is provided on the side wall of the tank body 1, and the input end of the sludge pump 15 is connected to the bottom of the sedimentation zone 13. The longitudinal section of the sedimentation zone 13 is U-shaped. The fast mixing zone 11, the magnetic flocculation zone 12 and the sedimentation zone 13 can be connected by a water pump. The water quality can be converted in each zone by using the water pump connection. The sedimentation zone 13 is U-shaped as a whole, which makes it convenient to gather the sludge in the center and then pump out the sludge through the sludge pump 15.

[0069] Specifically, when the deep bed denitrification filter tank for water treatment is working / in use: the motor 21 is started, the motor 21 drives the gear box and then drives the stirring shaft 22 to move, and the stirring shaft 22 moves, which drives the stirring blade 23 to move, and the stirring blade 23 stirs the water quality, so that the impurities in the water quality are evenly dispersed in the water, so as to facilitate better mixing with the water quality when the flocculant is added. After the flocculant is added, the motor 231 drives the stirring shaft 232 to move, thereby driving the impeller 33 to move, and the impeller 33 stirs the water flow to form suction, thereby promoting the water flow to move upward along the guide structure 4, first aggregate toward the center in the guide structure 4 and then diffuse toward the surrounding side. This flow mode can effectively promote the mixing of the flocculant and the water quality more fully, and in the sedimentation After sedimentation, the motor three 51 can be started to drive the stirring shaft three 52 and the support rod 53 to move. The sludge scraper assembly at the bottom of the support rod 53 can scrape the sludge in the sedimentation area. When the motor three 51 rotates counterclockwise, the scraper one 57 scrapes the upper layer of the sludge. At the same time, the air flow can be input through the gas explosion component 8 to break up the lower layer of sludge for easy scraping. When the motor three 51 rotates clockwise, the scraper two 58 is resisted and approaches the scraper rod 54. At this time, the scraper one 57 is lifted, and the scraper two 58 scrapes the lower layer of sludge. Whether it rotates clockwise or counterclockwise, the other scraper will not be affected, thereby achieving the purpose of layered scraping and effectively reducing the resistance of scraping. It is not only easier to remove the sludge but also reduces the damage to components.

[0070] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A water treatment deep bed denitrification filter, characterized in that: The invention comprises a tank body (1), wherein a quick mixing zone (11), a magnetic flocculation zone (12) and a sedimentation zone (13) are arranged inside the tank body (1), a sludge pump (15) is arranged on the side wall of the tank body (1), an input end of the sludge pump (15) is connected to the bottom of the sedimentation zone (13), the longitudinal section of the sedimentation zone (13) is U-shaped, and the quick mixing zone (11), the magnetic flocculation zone (12) and the sedimentation zone (13) are connected via a water pump, and further comprises: A mixing and stirring mechanism (2) is arranged in the fast mixing zone (11) and is used to quickly mix the water in the fast mixing zone (11); A flocculation stirring mechanism (3) is arranged in the magnetic flocculation area (12) and is used to mix the water and flocculant in the magnetic flocculation area (12); A flow guiding structure (4), arranged at the bottom of the magnetic flocculation area (12) and arranged around the flocculation stirring mechanism (3), and used for circulating water in the magnetic flocculation area (12); A sludge scraping mechanism (5) is arranged in the sedimentation area (13) and is used to scrape away sludge deposited in the sedimentation area (13); A drainage pipe (6) is fixedly connected to the water outlet (14) of the sedimentation area (13) and is used to discharge the water filtered by the sedimentation area (13); A honeycomb filter plate (7) connected to an upper position of the inner wall of the sedimentation area (13) and arranged below the water outlet (14); A gas explosion component (8) is connected to the outside of the tank body (1), and its output end is respectively connected to the mixing and stirring mechanism (2) and the mud scraping mechanism (5); The mixing and stirring mechanism (2) comprises a motor 1 (21), the output end of the motor 1 (21) is connected to a stirring shaft 1 (22) via a gear box, the outer wall of the stirring shaft 1 (22) is fixedly connected to a stirring blade 1 (23), and the stirring shaft 1 (22) is a hollow shaft; The gas explosion component (8) comprises an air pump (81) fixedly connected to the tank body (1) via a bracket, the output end of the air pump (81) is connected to a diverter valve (82) via a connecting pipe, the outer wall of the diverter valve (82) is connected to two hoses (83), one end of the hose (83) is fixedly connected to a shaft sleeve (84), and the shaft sleeve (84) is connected to the stirring shaft (22) via a sealing bearing; The flocculation stirring mechanism (3) comprises a second motor (31), the output end of the second motor (31) is connected to a second stirring shaft (32) via a gear box, the bottom end of the second stirring shaft (32) is fixedly connected to an impeller (33), and the impeller (33) is used to generate suction to cause the water flow to move along a predetermined trajectory of the guide structure (4).

2. A water treatment deep bed denitrification filter according to claim 1, characterized in that: The flow guide structure (4) comprises a flow guide cover (41) fixedly connected to the inner bottom wall of the magnetic flocculation zone (12); a through groove (42) is provided at the bottom of the side wall of the flow guide cover (41); the middle part of the flow guide cover (41) is funnel-shaped; a flow divider plate (43) is provided at the top of the flow guide cover (41); the flow divider plate (43) divides the top of the flow guide cover (41) into a plurality of identical water flow channels; The diverter plate (43) is a curved plate, and when water flows in the diverter plate (43), the flow direction changes and flows from the center to the periphery.

3. A water treatment deep bed denitrification filter according to claim 1, characterized in that: The scraping mechanism (5) comprises a motor three (51), the output end of the motor three (51) is fixedly connected to a stirring shaft three (52), the bottom of the stirring shaft three (52) is connected to a support rod (53), the bottom of the support rod (53) is connected to a scraping rod (54), the outer wall of the scraping rod (54) is hinged with a scraping assembly, and an elastic structure is arranged between the scraping assembly and the scraping rod (54).

4. A water treatment deep bed denitrification filter according to claim 3, characterized in that: The scraper assembly comprises an arc-shaped retaining frame (55), the arc-shaped retaining frame (55) being slidably mounted on the bottom of the scraper rod (54), and the two ends of the arc-shaped retaining frame (55) being detachably connected to a scraper blade 1 (57) and a scraper blade 2 (58) via a bolt 1 (56), respectively, and the scraper blade 1 (57) is connected to the scraper rod (54) via a hose.

5. A water treatment deep bed denitrification filter according to claim 4, characterized in that: The middle portion of the scraper blade 1 (57) is a hollow structure and the outer wall of the scraper blade 1 (57) is provided with a plurality of aeration holes (59), the aeration holes (59) are arranged on the scraper blade 1 (57) with openings tilted downward, when the scraper rod (54) rotates clockwise, the height of the scraper blade 1 (57) is smaller than the height of the scraper blade 2 (58), and when the scraper rod (54) rotates counterclockwise, the height of the scraper blade 1 (57) is greater than the height of the scraper blade 2 (58); Wherein, when the scraper plate 1 (57) is located at the bottom, the height is smaller than when the scraper plate 2 (58) is located at the bottom.

6. A water treatment deep bed denitrification filter according to claim 5, characterized in that: The elastic structure is a U-shaped mild steel bracket, the top of the arc-shaped retaining frame (55) is hinged to the mud scraping rod (54) via a connecting rod (510), and the hinge point of the connecting rod (510) and the center of the arc-shaped retaining frame (55) are coaxial.

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