Nitrogen driving device for denitrification filter tank

Abstract

The utility model discloses a denitrification filter nitrogen driving device, and particularly relates to the technical field of denitrification filter nitrogen driving, the denitrification filter nitrogen driving device comprises a denitrification deep-bed filter, a quartz sand filter material, a filter material supporting layer and a gas-water distributor are sequentially arranged in the denitrification deep-bed filter from top to bottom, a supporting assembly is arranged on the outer side of the filter material supporting layer, and the gas-water distributor is arranged in the denitrification deep-bed filter. The supporting assembly comprises a first filter screen cylinder, second filter screen cylinders are arranged at the two ends of the first filter screen cylinder, the second filter screen cylinders and the first filter screen cylinder are integrally formed, and the first filter screen cylinder and the second filter screen cylinder are filled with the quartz sand filter materials. Meanwhile, the filter screen cylinder prevents the quartz sand filter material from diffusing and floating outwards, so that the quartz sand filter material is prevented from being washed out, and the filtering effect of the quartz sand filter material is ensured.

Description

Technical Field

[0001] This utility model relates to the field of denitrification filter technology, and more specifically to a nitrogen removal device for denitrification filters. Background Technology

[0002] Deep bed denitrification filters, also known as deep bed denitrification filters, are an important technology in advanced wastewater treatment. These filters are multifunctional, flexible in operation, and versatile, simultaneously performing biological denitrification to remove total nitrogen, chemical micro-flocculation to remove total phosphorus, and filtering suspended solids. During denitrification operation, nitrogen accumulation occurs, causing a rapid rise in the filter water level. Nitrogen removal technology effectively releases the nitrogen adhering to the biofilm, extending the filter's filtration cycle and reducing backwash water volume.

[0003] For example, the existing technology disclosure number CN220012331U describes an automatic nitrogen removal system for a denitrification deep bed filter. This system uses air-water co-fluid backwashing to cause the quartz sand layers in the denitrification deep bed filter to rub against each other, creating a washing-like effect. At the same time, the vortex blade assembly agitates the quartz sand during air-water backwashing in the denitrification deep bed filter, washing away dirt and waste gases such as nitrogen, thus restoring the filter's filtration function.

[0004] However, in actual use, the existing technology makes it easy for the quartz sand to spread and float outwards during stirring. The floating quartz sand is easily washed away, thus reducing the subsequent filtration effect of the quartz sand. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, this utility model provides a nitrogen removal device for denitrification filter. The device uses the rotation of the filter screen cylinder to drive the quartz sand filter media to discharge dirt and nitrogen through friction. At the same time, the filter screen cylinder prevents the quartz sand filter media from spreading and floating outward, thus preventing the quartz sand filter media from being washed away and ensuring the filtration effect of the quartz sand filter media.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a denitrification filter nitrogen removal device, comprising a denitrification deep bed filter, wherein the denitrification deep bed filter is provided with quartz sand filter media, a filter media support layer and an air-water distributor arranged sequentially from top to bottom inside the filter media support layer, and a support assembly is provided on the outside of the filter media support layer, the support assembly including a filter screen cylinder one, and filter screen cylinder two provided at both ends of the filter screen cylinder one, and the filter screen cylinder two is integrally formed with the filter screen cylinder one, wherein the quartz sand filter media is filled inside the filter screen cylinder one and the filter screen cylinder two;

[0007] Filter cylinder one and filter cylinder two can rotate to drive the quartz sand filter media to rotate, so that the quartz sand filter media collide and rub against each other to discharge dirt and nitrogen. At the same time, filter cylinder one and filter cylinder two prevent the quartz sand filter media from spreading and floating outward, preventing the quartz sand filter media from being washed away, thus ensuring the filtration effect of the quartz sand filter media.

[0008] Preferably, each of the two filter cylinders has multiple blades fixed to its outer wall, and the ends of the two filter cylinders away from the filter cylinder are respectively connected to the inner side walls of the denitrification deep bed filter through a rotating shaft.

[0009] Preferably, a plurality of material distribution blocks are fixed on the inner wall of the filter cylinder. The cross-section of the material distribution blocks is set as a triangle. When the quartz sand filter media rotates, the accumulated quartz sand filter media can be distributed outward along the inclined surface of the material distribution blocks, which facilitates the discharge of dirt and nitrogen attached inside the quartz sand filter media.

[0010] Preferably, the outer wall of the filter cylinder has an opening, and a filter cover plate is provided in the opening. One side of the filter cover plate is hinged to one side wall of the opening, and the other side of the filter cover plate is fixed to the other side wall of the opening by a buckle, which facilitates the filling and discharge of quartz sand filter media in the filter cylinder.

[0011] Preferably, the input end of the denitrification deep bed filter is provided with a mixing tank, and the output end of the denitrification deep bed filter is connected to a clear water tank, and the clear water after the sewage is treated by the denitrification deep bed filter is discharged into the clear water tank.

[0012] Preferably, a water backwashing pipeline is provided between the denitrification deep bed filter and the clear water tank. The backwashing water pump on the water backwashing pipeline inputs water from the clear water tank into the denitrification deep bed filter. The input end of the denitrification deep bed filter is also provided with an air backwashing pipeline. The blower on the air backwashing pipeline transports gas into the denitrification deep bed filter. Water and gas enter the denitrification deep bed filter for backwashing after passing through an air-water distributor.

[0013] Preferably, the denitrification deep bed filter is also provided with a wastewater tank at the output end, into which the backwashed sludge is discharged.

[0014] Preferably, the water flow from the water backwashing pipeline and the air flow from the air backwashing pipeline drive the blades on the two filter cylinders to rotate, so as to drive the filter cylinders to rotate during backwashing.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] 1. During nitrogen removal, the rotation of the filter screen cylinder causes the quartz sand filter media to collide and rub against each other. At the same time, the accumulated quartz sand filter media is distributed outward along the inclined surface of the distribution block, which facilitates the discharge of dirt and nitrogen attached inside the quartz sand filter media. This can effectively extend the filtration cycle of the quartz sand filter media, reduce the amount of backwash water, and save energy and reduce consumption.

[0017] 2. During the nitrogen removal process, filter screen cylinder one and filter screen cylinder two can prevent the quartz sand filter media from spreading and floating outward, thus preventing the quartz sand filter media from being washed away and ensuring the filtration effect of the quartz sand filter media. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the present invention;

[0019] Figure 2 This is a diagram showing the internal structure of the denitrification deep bed filter of this utility model;

[0020] Figure 3 This is an internal cross-sectional view of the denitrification deep bed filter of this utility model;

[0021] Figure 4 This is a structural diagram of the support component of this utility model;

[0022] Figure 5 This is a cross-sectional view of the support component of this utility model.

[0023] The attached diagram is labeled as follows: 1. Denitrification deep bed filter, 2. Mixing tank, 3. Clear water tank, 4. Wastewater tank, 5. Water backwashing pipeline, 6. Backwash water pump, 7. Air backwashing pipeline, 8. Blower;

[0024] 11 Quartz sand filter media, 12 Filter media support layer, 13 Air-water distributor;

[0025] 14 Support assembly, 141 Filter screen cylinder one, 142 Filter screen cylinder two, 143 Rotating shaft, 144 Blades, 145 Filter screen cover plate, 146 Material distribution block. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Refer to the instruction manual appendix Figure 1 This utility model provides a nitrogen removal device for a denitrification filter, including a denitrification deep bed filter 1 with a depth of approximately 1.83 meters. The input end of the denitrification deep bed filter 1 is equipped with a mixing tank 2. In the denitrification mode, a carbon source needs to be added to the mixing tank 2. An intelligent carbon source addition system is adopted to control the amount of carbon source added at a reasonable level.

[0028] The output end of the denitrification deep bed filter 1 is connected to a clear water tank 3. The clear water after the sewage is treated by the denitrification deep bed filter 1 is discharged into the clear water tank 3. A water backwashing pipeline 5 is provided between the denitrification deep bed filter 1 and the clear water tank 3. An air backwashing pipeline 7 is also provided at the input end of the denitrification deep bed filter 1. The backwashing water source and air source are provided by the backwashing water pump 6 and the blower 8. A wastewater tank 4 is also provided at the output end of the denitrification deep bed filter 1. The backwashing sludge is discharged into the wastewater tank 4 and finally discharged into the sewage well.

[0029] Next, as Figure 2-3 As shown, inside the denitrification deep bed filter 1, from top to bottom, are arranged quartz sand filter media 11, a filter media support layer 12, and an air-water distributor 13. The quartz sand filter media 11 has a thickness of 2-3 mm, and the filter media support layer 12 is composed of gravel and pebbles of different specifications with a thickness of approximately 300-500 mm, arranged in alternating layers. During backwashing, water and gas enter the denitrification deep bed filter 1 through the air-water distributor 13 for backwashing. The air-water distributor 13 is a device used to mix or separate gases and liquids, commonly found in various industrial applications such as wastewater treatment, chemical industry, and air conditioning systems. Its main function is to ensure that gases and liquids can be fully mixed or separated under specific conditions to achieve the best reaction or treatment effect.

[0030] During the denitrification deep bed filter 1's operation in nitrogen removal mode, nitrogen accumulation occurs, causing a rapid rise in the filter water level. At this time, it is necessary to release the nitrogen adhering to the quartz sand filter media 11. To prevent the quartz sand filter media 11 from spreading and floating outwards during nitrogen removal, such as... Figure 2-5 As shown, a support assembly 14 is provided on the outside of the filter media support layer 12. The support assembly 14 includes a filter screen cylinder 141 and filter screen cylinders 142 at both ends of the filter screen cylinder 141. The filter screen cylinders 142 are integrally formed with the filter screen cylinder 141. The quartz sand filter media 11 is filled inside the filter screen cylinders 141 and 142. The filter screen cylinders 141 and 142 can filter the sewage in the denitrification deep bed filter tank 1 and improve the sewage treatment effect.

[0031] Next, the ends of the two filter cylinders 142 furthest from the filter cylinder 141 are rotatably connected to the inner side walls of the denitrification deep bed filter tank 1 via shafts 143. Multiple blades 144 are fixed to the outer walls of both filter cylinders 142. In practice, to save on the cost of adding motors and other equipment, a pipe can be drawn from both the water backwash pipe 5 and the air backwash pipe 7, respectively, and directed towards the blades 144 on the two filter cylinders 142. During backwashing, the water flow from the water backwash pipe 5 and the air flow from the air backwash pipe 7 drive the blades 144 on the two filter cylinders 142 to rotate, thereby driving the rotation of filter cylinders 141 and 142, which in turn rotates the quartz sand filter media 11, allowing the quartz sand to pass through. The filter media 11 collide and rub against each other to discharge the dirt and nitrogen attached inside. At the same time, multiple triangular material distribution blocks 146 are fixed on the inner wall of the filter screen cylinder 141. When the quartz sand filter media 11 rotates inside the filter screen cylinder 141, the accumulated quartz sand filter media 11 can be distributed outward along the inclined surface of the material distribution blocks 146, which also facilitates the discharge of dirt and nitrogen attached inside the quartz sand filter media 11. This can effectively extend the filtration cycle of the quartz sand filter media 11, reduce the backwash water volume, and save energy and reduce consumption.

[0032] During the nitrogen removal process, filter screen cylinder 141 and filter screen cylinder 142 can prevent the quartz sand filter media 11 from spreading and floating outward, thus preventing the quartz sand filter media 11 from being washed away and ensuring the filtration effect of the quartz sand filter media 11.

[0033] In addition, an opening is provided on the outer wall of the filter cylinder 141, and a filter cover plate 145 is provided inside the opening. Figure 4-5 (The filter cylinder and filter cover plate 145 are not drawn in a mesh shape for the sake of clear structural illustration.) One side of the filter cover plate 145 is hinged to the side wall of the opening, and the other side of the filter cover plate 145 is fixed to the other side wall of the opening by a buckle. The filter cover plate 145 also has a sewage filtration function, and opening the filter cover plate 145 facilitates the filling and discharging of the quartz sand filter media 11 in the filter cylinder 141.

[0034] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A nitrogen removal device for a denitrification filter, comprising a denitrification deep bed filter (1), wherein the denitrification deep bed filter (1) is provided with, from top to bottom, a quartz sand filter media (11), a filter media support layer (12), and an air-water distributor (13), characterized in that: The filter material support layer (12) is provided with a support component (14) on its outer side; The support component (14) includes a filter cylinder one (141), and filter cylinder two (142) is provided at both ends of the filter cylinder one (141). The filter cylinder two (142) is integrally formed with the filter cylinder one (141). The quartz sand filter material (11) is filled inside the filter cylinder one (141) and the filter cylinder two (142).

2. The nitrogen removal device for a denitrification filter according to claim 1, characterized in that: Multiple blades (144) are fixed on the outer walls of the two filter cylinders (142). The ends of the two filter cylinders (142) away from the filter cylinder (141) are rotatably connected to the inner side walls of the denitrification deep bed filter (1) through the rotating shaft (143).

3. The nitrogen removal device for a denitrification filter according to claim 1, characterized in that: The inner wall of the filter cylinder (141) is fixed with a plurality of material distribution blocks (146), and the cross section of the material distribution blocks (146) is set as a triangle.

4. The nitrogen removal device for a denitrification filter according to claim 1, characterized in that: The outer wall of the filter cylinder (141) has an opening, and a filter cover plate (145) is provided in the opening. One side of the filter cover plate (145) is hinged to one side wall of the opening, and the other side of the filter cover plate (145) is fixed to the other side wall of the opening by a buckle, which facilitates the filling and discharge of quartz sand filter material (11) in the filter cylinder (141).

5. The nitrogen removal device for a denitrification filter according to claim 1, characterized in that: The input end of the denitrification deep bed filter (1) is equipped with a mixing tank (2), and the output end of the denitrification deep bed filter (1) is connected to a clear water tank (3). The clear water after the sewage is treated by the denitrification deep bed filter (1) is discharged into the clear water tank (3).

6. The nitrogen removal device for a denitrification filter according to claim 5, characterized in that: A water backwashing pipeline (5) is provided between the denitrification deep bed filter (1) and the clear water tank (3). The backwashing water pump (6) on the water backwashing pipeline (5) inputs the water in the clear water tank (3) into the denitrification deep bed filter (1). The input end of the denitrification deep bed filter (1) is also provided with an air backwashing pipeline (7). The blower (8) on the air backwashing pipeline (7) transports the gas into the denitrification deep bed filter (1). The water and gas enter the denitrification deep bed filter (1) for backwashing after passing through the air-water distributor (13).

7. A nitrogen removal device for a denitrification filter according to claim 6, characterized in that: The denitrification deep bed filter (1) is also equipped with a wastewater tank (4) at the output end, and the backwashed sludge is discharged into the wastewater tank (4).

8. A nitrogen removal device for a denitrification filter according to claim 6, characterized in that: The water jet from the water backwash pipe (5) and the air jet from the air backwash pipe (7) drive the blades (144) on the two filter cylinders (142) to rotate, so as to drive the filter cylinders (141) and (142) to rotate during backwashing.

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