Denitrification filtration-based equipment for wastewater treatment

Abstract

The invention discloses denitrification filtration-based equipment for wastewater treatment, and belongs to the technical field of denitrification, the denitrification filtration-based equipment comprises a filter tank, the top of one side of the filter tank is fixedly connected with a sedimentation tank, one side of the sedimentation tank is fixedly connected with a water inlet pipe, and the top of the inner surface of the filter tank is fixedly connected with a filter plate; and the front side of the filter tank is fixedly connected with a driving assembly. The driving motor can be started, the air distribution pipe is driven to do circulating reciprocating motion at the bottom of the second net plate through transmission among all the parts, the three-way pipe is connected with an external air pump, air enters the air distribution pipe through the three-way pipe and the air inlet pipe, airflow is sprayed out through the air outlet holes in the air distribution pipe, and the sprayed airflow is blown to quartz sand. And air backwashing is carried out on the quartz sand, the quartz sand is blown to drift away and collide in the filter box, suspended solids and biological membranes on the outer surface of the quartz sand are stripped by airflow, and the quartz sand is cleaned.

Description

Technical Field

[0001] This invention relates to the field of denitrification technology, and more specifically, to a denitrification-based filtration device for wastewater treatment. Background Technology

[0002] In the process of wastewater treatment, denitrification biological filter wastewater treatment equipment is usually used to remove nitrogen from the wastewater. Denitrification filter is a structure that uses quartz sand as the biofilm medium for denitrifying organisms to remove nitrate nitrogen and suspended solids. When in use, wastewater is allowed to enter the denitrification tank, and then denitrification is carried out through the internal filter layer components before the water is discharged.

[0003] The existing denitrification filter has certain drawbacks. After a period of use, the denitrification packing material tends to adsorb sludge, which affects the purification effect of the denitrification filter and fails to meet people's needs.

[0004] Chinese patent CN215712445U discloses a high-efficiency denitrification filter tank. Through a precision filtration mechanism, it purifies wastewater. The included support, placement box, and denitrification packing allow for rapid purification of the filtered wastewater, improving purification efficiency and extending the service life of the denitrification packing. Furthermore, the included mounting brackets and blocks enhance the efficiency of installation and disassembly of the placement box, improving worker productivity and user convenience. The entire device features a simple structure, is easy to operate, and increases the applicability of the denitrification filter tank. However, after long-term use, microorganisms on the surface of denitrification filter media will adhere to form a biofilm. If the biofilm becomes too thick or the suspended solids in the influent exceed the standard after long-term operation, it will cause the filter media pores to become clogged, requiring frequent backwashing. This not only wastes water and energy, but also interrupts the continuous treatment process. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of this invention is to provide a wastewater treatment device based on denitrification filtration.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A wastewater treatment device based on denitrification filtration includes a filter tank, a sedimentation tank fixedly connected to the top of one side of the filter tank, an inlet pipe fixedly connected to one side of the sedimentation tank, a filter plate fixedly connected to the top of the inner surface of the filter tank, a drive assembly fixedly connected to the front side of the filter tank, a sewage pipe and a clean water pipe fixedly connected to the top and bottom of one side of the filter tank respectively, a water distribution assembly provided on the inner surface of the filter tank near the sedimentation tank, and a filter assembly provided at the bottom of the inner surface of the filter tank.

[0008] The filtration assembly includes a filter box fixed to the inner surface of the filter tank and a support shaft rotatably connected to the bottom of the filter tank. A ring is fixedly connected to the top of the support shaft, and a ring-shaped rack is fixedly connected to the outer surface of the ring. A protrusion is fixedly connected to one side of the top of the ring. A first mesh plate is fixedly connected to the top of the filter box, and a second mesh plate is fixedly connected to the bottom of the inner surface of the filter box. Air distribution pipes are slidably connected to both sides of the bottom of the second mesh plate. Air outlets are evenly arranged at the top of the air distribution pipes, and a slide rail is fixedly connected to the bottom of the air distribution pipes. An air inlet pipe is fixedly connected to one side of the bottom of the air distribution pipes, and a T-shaped pipe is fixedly connected to the bottom of the air inlet pipes. A dispersing component is provided at the bottom of the first mesh plate.

[0009] Furthermore, the drive assembly includes a drive motor fixed to the top of one end of the back of the filter tank and two transmission shafts rotatably connected to one side of the inside of the filter plate. The output end of the drive motor and the outer surface of the transmission shaft are fixedly connected to a second gear. The outer surfaces of the three second gears are fitted with a second synchronous belt. The bottom of the transmission shaft is fixedly connected to a third gear.

[0010] Furthermore, an inlet pipe is fixedly connected to one side of the sedimentation tank, and a sewage pipe and a clean water pipe are fixedly connected to the top and bottom of one side of the filtration tank, respectively. The bottom of the drive shaft passes through the interior of the filter plate, the first screen plate, and the second screen plate in sequence. The third gear meshes with the ring rack. The top of the protrusion extends into the interior of the slide rail, and the protrusion and the slide rail slide and adapt to each other.

[0011] Furthermore, the filter box is provided with two sets, and the bottom of the two air inlet pipes are connected to a three-way pipe. The front end of the three-way pipe is provided with a telescopic flexible hose, and one end of the telescopic flexible hose extends out of the interior of the filter tank. Quartz sand particles are added inside the filter box.

[0012] Furthermore, the dispersing component includes a fourth gear rotating at the bottom of the first mesh plate and a first gear fixed on the outer surface of the drive shaft. The outer surfaces of the fourth gear and the first gear are fitted with a first synchronous belt, and a push plate is fixedly connected to the outer surface of the first synchronous belt.

[0013] Furthermore, a frame plate is provided inside the first mesh plate, and a connecting shaft is fixedly connected to the top of the fourth gear, with the top of the connecting shaft rotatably connected to the frame plate.

[0014] Furthermore, a limiting circular plate is provided at the bottom of the fourth gear, and the first synchronous belt is located above the limiting circular plate.

[0015] Furthermore, the water distribution assembly includes two connection ports located at the top of one side of the filter tank, with a water distribution trough fixedly connected inside the connection ports, and a filter screen frame installed inside the water distribution trough.

[0016] Furthermore, guide plates are evenly fixedly connected to both sides of the water distribution trough, the guide plates are parallel to the sides of the water distribution trough, and there is a gap between the guide plates and the water distribution trough.

[0017] Furthermore, the interior of the connection port is interconnected with the interior of the sedimentation tank, the interior of the water distribution trough is interconnected with the interior of the sedimentation tank, and the filter screen frame is adapted to the water distribution trough.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This solution incorporates a filter assembly. When the drive motor is activated, the transmission between the components causes the air distribution pipe to move back and forth at the bottom of the second mesh plate. The three-way pipe is connected to an external air pump, and gas enters the air distribution pipe through the three-way pipe and the air inlet pipe. The airflow is ejected from the inside of the air distribution pipe through a ring toothed rack. The ejected airflow blows towards the quartz sand, performing air backwashing on the quartz sand. The airflow causes the quartz sand to disperse and collide inside the filter box, allowing the airflow to peel off suspended solids and biofilm from the outer surface of the quartz sand, thus cleaning the quartz sand.

[0019] 2. This solution incorporates a dispersing component. The first gear drives multiple fourth gears to rotate via a first synchronous belt. As the first synchronous belt moves, it drives the push plate to move synchronously. The push plate agitates the scattered quartz sand, stirring the quartz sand at the edge of the filter box to make it come into contact with the air. This continuously agitates the upper and lower layers of quartz sand, ensuring that each grain of quartz sand is cleaned by the air, further improving the backwashing effect.

[0020] 3. This solution incorporates a water distribution component. Wastewater enters the interior of the filter screen frame, where large particles are effectively blocked and concentrated inside. Wastewater overflows from the distribution trough, and some of the overflowing water is blocked by the guide plate. It then flows along the surface of the guide plate and falls into the area below the distribution trough, increasing the area of ​​the filter plate for wastewater filtration and effectively improving the wastewater filtration rate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the filter tank structure of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the filter tank structure of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the filter assembly structure of the present invention; Figure 6 This is a cross-sectional view of the filter assembly of the present invention; Figure 7 This is a schematic diagram of the disintegration component structure of the present invention; Figure 8 This is a schematic diagram of the water distribution trough structure of the present invention. Figure 1 ; Figure 9 This is a schematic diagram of the water distribution trough structure of the present invention. Figure 2 .

[0022] Explanation of the labels in the diagram: 1. Filter tank; 2. Inlet pipe; 3. Sedimentation tank; 4. Filter plate; 5. Water distribution assembly; 51. Connection port; 52. Water distribution trough; 53. Filter screen frame; 54. Flow guide plate; 6. Filter assembly; 61. Filter box; 62. First screen plate; 63. Second screen plate; 64. Air distribution pipe; 65. Slide rail; 66. Support shaft; 67. Circular ring; 68. Disassembly assembly; 681. First gear; 682. First timing belt; 683. Fourth gear; 684. Push plate; 69. Tee; 610. Intake pipe; 611. Ring rack; 612. Protrusion; 613. Exhaust port; 7. Drive assembly; 71. Drive motor; 72. Second gear; 73. Drive shaft; 74. Second synchronous belt; 75. Third gear; 8. Water purification pipe; 9. Sewage discharge pipe. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] Please see Figures 1 to 9A wastewater treatment device based on denitrification filtration includes a filter tank 1, a sedimentation tank 3 fixedly connected to the top of one side of the filter tank 1, an inlet pipe 2 fixedly connected to one side of the sedimentation tank 3, a filter plate 4 fixedly connected to the top of the inner surface of the filter tank 1, a drive assembly 7 fixedly connected to the front side of the filter tank 1, a sewage pipe 9 and a clean water pipe 8 fixedly connected to the top and bottom of one side of the filter tank 1, respectively, a water distribution assembly 5 provided on the inner surface of the filter tank 1 near the sedimentation tank 3, and a filter assembly 6 provided at the bottom of the inner surface of the filter tank 1.

[0025] like Figure 5-7 As shown, the filter assembly 6 includes a filter box 61 fixed to the inner surface of the filter tank 1 and a support shaft 66 rotatably connected to the bottom of the filter tank 1. A ring 67 is fixedly connected to the top of the support shaft 66, and a ring rack 611 is fixedly connected to the outer surface of the ring 67. A protrusion 612 is fixedly connected to one side of the top of the ring 67. A first mesh plate 62 is fixedly connected to the top of the filter box 61. A second mesh plate 63 is fixedly connected to the bottom of the inner surface of the filter box 61. Air distribution pipes 64 are slidably connected to both sides of the bottom of the second mesh plate 63. Air outlet holes 613 are evenly arranged on the top of the air distribution pipes 64. A slide rail 65 is fixedly connected to the bottom of the air distribution pipes 64. An air inlet pipe 610 is fixedly connected to one side of the bottom of the air distribution pipes 64. A three-way pipe 69 is fixedly connected to the bottom of the air inlet pipe 610. A dispersing component 68 is provided at the bottom of the first mesh plate 62.

[0026] like Figure 2 As shown, the drive assembly 7 includes a drive motor 71 fixed to the top of one end of the back of the filter tank 1 and two drive shafts 73 rotatably connected to one side of the filter plate 4. The output end of the drive motor 71 and the outer surface of the drive shaft 73 are fixedly connected to a second gear 72. The outer surfaces of the three second gears 72 are fitted with a second synchronous belt 74. The bottom of the drive shaft 73 is fixedly connected to a third gear 75.

[0027] A water inlet pipe 2 is fixedly connected to one side of the sedimentation tank 3. A sewage pipe 9 and a clean water pipe 8 are fixedly connected to the top and bottom of one side of the filter tank 1, respectively. The bottom of the drive shaft 73 passes through the interior of the filter plate 4, the first screen plate 62 and the second screen plate 63 in sequence. The third gear 75 meshes with the ring rack 611. The top of the protrusion 612 extends into the interior of the slide rail 65. The protrusion 612 and the slide rail 65 slide and adapt to each other.

[0028] The filter box 61 is provided with two sets of air inlet pipes 610. The bottom of the two air inlet pipes 610 are connected to a three-way pipe 69. The front end of the three-way pipe 69 is provided with a telescopic hose, and one end of the telescopic hose extends out of the interior of the filter pool 1. Quartz sand particles are added inside the filter box 61.

[0029] When the wastewater is filtered, the wastewater passes through the water distribution component 5, which can effectively block large particles of impurities. The wastewater then passes through the filter plate 4, which can filter most of the small-diameter impurities. When the wastewater enters the interior of the filter box 61 and comes into contact with the quartz sand packing, the nitrate nitrogen in the wastewater is converted into nitrogen gas by the denitrifying bacteria on the surface of the quartz sand. The quartz sand adsorbs and filters the suspended solids in the wastewater. After filtration and purification by the quartz sand, the wastewater enters the bottom of the filter tank 1 and is then discharged through the clean water pipe 8. After a period of use, the surface of the quartz sand becomes filled with suspended matter, resulting in a decrease in filtration efficiency. At this time, the quartz sand needs to be cleaned. Connect the three-way pipe 69 to the external air pump. The gas enters the air distribution pipe 64 through the three-way pipe 69 and the air inlet pipe 610. The airflow is ejected from the air outlet 613 inside the air distribution pipe 64. The ejected airflow blows towards the quartz sand, performing air backwashing on the quartz sand. The airflow blows the quartz sand into the filter box 61, causing it to disperse and collide inside. This allows the airflow to peel off the suspended matter and biofilm on the outer surface of the quartz sand, cleaning the quartz sand. The suspended matter is washed out and suspended in the upper part of the water flow. The wastewater in the upper part is discharged to the outside through the drain pipe 9. While cleaning, the drive motor 71 is started to drive the second gear 72 to rotate. The second gear 72 drives another second gear 72 to rotate through the second synchronous belt 74, so that the two drive shafts 73 rotate synchronously. The drive shafts 73 drive the ring rack 611 to rotate through the third gear 75, so that the ring 67 drives the protrusion 612 to rotate in a circle. The protrusion 612 moves back and forth inside the slide rail 65, driving the slide rail 65 to move back and forth in a cycle. This drives the air distribution pipe 64 to move back and forth in a cycle at the bottom of the second mesh plate 63, thereby effectively increasing the area of ​​air backwashing, avoiding the inability to clean local quartz sand, and effectively improving the cleaning effect.

[0030] like Figure 7 As shown, the dispersing component 68 includes a fourth gear 683 that rotates at the bottom of the first mesh plate 62 and a first gear 681 that is fixed on the outer surface of the drive shaft 73. A first synchronous belt 682 is sleeved on the outer surface of the fourth gear 683 and the first gear 681. A push plate 684 is fixedly connected to the outer surface of the first synchronous belt 682.

[0031] The first mesh plate 62 has a frame plate inside, and the top of the fourth gear 683 is fixedly connected to a connecting shaft, and the top of the connecting shaft is rotatably connected to the frame plate.

[0032] The bottom of the fourth gear 683 is provided with a limiting circular plate, and the first synchronous belt 682 is located above the limiting circular plate.

[0033] During air backwashing of quartz sand, the quartz sand at the inner edge and top of the filter box 61 cannot come into contact with the air. When the top quartz sand comes into contact with the air, the impact force of the air is weakened, and the cleaning effect is worse. Therefore, during cleaning, the drive shaft 73 drives the first gear 681 to rotate synchronously. The first gear 681 drives multiple fourth gears 683 to rotate through the first synchronous belt 682. During the movement of the first synchronous belt 682, the push plate 684 moves synchronously. The push plate 684 agitates the scattered quartz sand, which can agitate the quartz sand at the edge of the filter box 61 to come into contact with the air, and continuously agitate the upper and lower layers of quartz sand, so that each grain of quartz sand can be cleaned by the air, further improving the backwashing effect.

[0034] like Figure 7-9 As shown, the water distribution assembly 5 includes two connection ports 51 located on the top of one side of the filter tank 1. A water distribution trough 52 is fixedly connected inside the connection port 51, and a filter screen frame 53 is installed inside the water distribution trough 52.

[0035] Guide plates 54 are evenly fixedly connected to both sides of the water distribution trough 52. The guide plates 54 are parallel to the sides of the water distribution trough 52, and there is a gap between the guide plates 54 and the water distribution trough 52.

[0036] The interior of the connection port 51 is connected to the interior of the sedimentation tank 3, the interior of the water distribution tank 52 is connected to the interior of the sedimentation tank 3, and the filter screen frame 53 is compatible with the water distribution tank 52.

[0037] When sewage enters the device, it enters the sedimentation tank 3 and then the distribution tank 52 through the connection port 51. The sewage then enters the filter screen frame 53, where large particles are effectively blocked and concentrated. Sewage overflows from the distribution tank 52, and some of the overflowing water is blocked by the guide plate 54. It flows along the surface of the guide plate 54 and falls into the area below the distribution tank 52, increasing the filtration area of ​​the filter plate 4 and effectively improving the filtration rate. The filter screen frame 53 can be manually removed from the distribution tank 52, and large particles can be shaken off by manually tapping it. The cleaned filter screen frame 53 can then be placed back into the distribution tank 52 to prevent large particles from clogging the filter holes of the filter plate 4.

[0038] Instructions for use: When sewage enters the device, it enters the sedimentation tank 3 and the distribution tank 52 through the connection port 51. The sewage then enters the filter screen frame 53, where large particles are effectively blocked and concentrated. Sewage overflows from the distribution tank 52, and some of the overflowing water is blocked by the guide plate 54. It flows along the surface of the guide plate 54 and falls into the area below the distribution tank 52, increasing the area of ​​the filter plate 4 for sewage filtration and effectively improving the sewage filtration rate. The filter screen frame 53 can be manually removed from the distribution tank 52. Large particles inside the filter screen frame 53 can be shaken off by manually tapping it. The cleaned filter screen frame 53 can then be placed back inside the distribution tank 52. The start-up drive motor 71 drives the second gear 72 to rotate. The second gear 72 drives another second gear 72 to rotate through the second synchronous belt 74, so that the two drive shafts 73 rotate synchronously. The drive shafts 73 drive the ring rack 611 to rotate through the third gear 75, so that the ring 67 drives the protrusion 612 to rotate in a circle. The protrusion 612 moves back and forth inside the slide rail 65, driving the slide rail 65 to move back and forth in a cycle, and driving the air distribution pipe 64 to move back and forth in a cycle at the bottom of the second mesh plate 63. Next, connect the three-way pipe 69 to the external air pump. The gas enters the air distribution pipe 64 through the three-way pipe 69 and the air inlet pipe 610. The airflow is ejected from the air outlet 613 inside the air distribution pipe 64. The ejected airflow blows towards the quartz sand, backwashing the quartz sand with air. The airflow blows the quartz sand into the filter box 61, causing it to disperse and collide. This causes the airflow to peel off the suspended matter and biofilm on the outer surface of the quartz sand, cleaning the quartz sand. The suspended matter is washed out and suspended in the upper part of the water flow. The wastewater in the upper part is discharged to the outside through the drain pipe 9. At the same time, the drive shaft 73 will drive the first gear 681 to rotate synchronously. The first gear 681 drives multiple fourth gears 683 to rotate through the first synchronous belt 682. During the movement of the first synchronous belt 682, the push plate 684 moves synchronously. The push plate 684 agitates the scattered quartz sand, which can agitate the quartz sand at the edge of the filter box 61 to come into contact with the air, and continuously agitate the upper and lower layers of quartz sand, so that each grain of quartz sand can be cleaned by the air, further improving the backwashing effect.

[0039] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A wastewater treatment device based on denitrification filtration, comprising a filter tank (1), a sedimentation tank (3) fixedly connected to the top of one side of the filter tank (1), a filter plate (4) fixedly connected to the top of the inner surface of the filter tank (1), and a drive assembly (7) fixedly connected to the front side of the filter tank (1). Its features are: A water distribution component (5) is provided on the inner surface of the filter tank (1) near the sedimentation tank (3), and a filter component (6) is provided at the bottom of the inner surface of the filter tank (1). The filter assembly (6) includes a filter box (61) fixed to the inner surface of the filter tank (1) and a support shaft (66) rotatably connected to the bottom of the filter tank (1). A ring (67) is fixedly connected to the top of the support shaft (66), and an annular rack (611) is fixedly connected to the outer surface of the ring (67). A protrusion (612) is fixedly connected to one side of the top of the ring (67). A first mesh plate (62) is fixedly connected to the top of the filter box (61). The bottom of the inner surface of the filter box (61) is... A second mesh plate (63) is fixedly connected to the first mesh plate (62). Air distribution pipes (64) are slidably connected to both sides of the bottom of the second mesh plate (63). Air outlet holes (613) are evenly arranged on the top of the air distribution pipes (64). A slide rail (65) is fixedly connected to the bottom of the air distribution pipes (64). An air inlet pipe (610) is fixedly connected to one side of the bottom of the air distribution pipes (64). A three-way pipe (69) is fixedly connected to the bottom of the air inlet pipe (610). A dispersing component (68) is provided at the bottom of the first mesh plate (62).

2. The wastewater treatment device based on denitrification filtration according to claim 1, characterized in that: The drive assembly (7) includes a drive motor (71) fixed to the top of one end of the back of the filter tank (1) and two drive shafts (73) rotatably connected to one side of the filter plate (4). The output end of the drive motor (71) and the outer surface of the drive shaft (73) are fixedly connected to a second gear (72). The outer surfaces of the three second gears (72) are fitted with a second synchronous belt (74). The bottom of the drive shaft (73) is fixedly connected to a third gear (75).

3. The wastewater treatment device based on denitrification filtration according to claim 2, characterized in that: The sedimentation tank (3) is fixedly connected to an inlet pipe (2) on one side. The top and bottom of the filter tank (1) are fixedly connected to a sewage pipe (9) and a clean water pipe (8) respectively. The bottom of the drive shaft (73) passes through the interior of the filter plate (4), the first screen plate (62) and the second screen plate (63) in sequence. The third gear (75) meshes with the ring rack (611). The top of the protrusion (612) extends into the interior of the slide rail (65). The protrusion (612) and the slide rail (65) slide and adapt to each other.

4. The wastewater treatment device based on denitrification filtration according to claim 3, characterized in that: The filter box (61) is provided with two sets, and the bottom of the two air inlet pipes (610) are connected to a three-way pipe (69). The front end of the three-way pipe (69) is provided with a telescopic hose, and one end of the telescopic hose extends out of the interior of the filter pool (1). Quartz sand particles are added inside the filter box (61).

5. The wastewater treatment device based on denitrification filtration according to claim 4, characterized in that: The dispersing component (68) includes a fourth gear (683) rotating at the bottom of the first mesh plate (62) and a first gear (681) fixed on the outer surface of the drive shaft (73). The outer surfaces of the fourth gear (683) and the first gear (681) are fitted with a first synchronous belt (682), and a push plate (684) is fixedly connected to the outer surface of the first synchronous belt (682).

6. A wastewater treatment device based on denitrification filtration according to claim 5, characterized in that: The first mesh plate (62) has a frame plate inside, and the top of the fourth gear (683) is fixedly connected to a connecting shaft, and the top of the connecting shaft is rotatably connected to the frame plate.

7. The wastewater treatment device based on denitrification filtration according to claim 6, characterized in that: The bottom of the fourth gear (683) is provided with a limiting circular plate, and the first synchronous belt (682) is located above the limiting circular plate.

8. The wastewater treatment device based on denitrification filtration according to claim 1, characterized in that: The water distribution assembly (5) includes two connection ports (51) opened on the top of one side of the filter tank (1). A water distribution trough (52) is fixedly connected inside the connection port (51), and a filter screen frame (53) is provided inside the water distribution trough (52).

9. A wastewater treatment device based on denitrification filtration according to claim 8, characterized in that: The water distribution trough (52) is uniformly fixedly connected to both sides of the water distribution trough (52). The water distribution trough (54) is parallel to the side of the water distribution trough (52), and there is a gap between the water distribution trough (54) and the water distribution trough (52).

10. A wastewater treatment device based on denitrification filtration according to claim 9, characterized in that: The interior of the connection port (51) is connected to the interior of the sedimentation tank (3), the interior of the water distribution trough (52) is connected to the interior of the sedimentation tank (3), and the filter screen frame (53) is adapted to the water distribution trough (52).

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