Downward flow integrated denitrification biofilter device applied to domestic sewage

Abstract

The utility model provides a downward flow integrated denitrification biofilter device applied to domestic sewage, and relates to the technical field of denitrification deep bed filters, the downward flow integrated denitrification biofilter device comprises a filter main body box body and a pipe gallery room, support columns are arranged on the outer side of the filter main body box body, and the pipe gallery room is reserved between the support columns and the filter main body box body; the filter tank main body box body is sequentially provided with an ultrahigh area, a water distribution tank, a filter water head area, a filter bed, a supporting layer and filter bricks from top to bottom. When pipeline backwashing is carried out, water flow is reversely injected into the filter bricks, the supporting layer, the filter bed and the filter head area through the backwashing water inlet pipe flange opening, high-pressure air is injected into the backwashing water inlet pipe flange opening to stir water and enhance the washing efficiency, and finally washing wastewater is discharged through the backwashing water outlet pipe flange opening. In addition, a plurality of through holes are formed in the inner wall between the first-stage distribution cavity and the second-stage compensation cavity, so that blind areas in the backwashing process are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of denitrification deep bed filter, in particular to a downward flow integrated denitrification biological filter device applied to domestic sewage. Background Art

[0002] With the continuous development of society and the increasing efforts to protect the ecological environment, my country's water quality requirements for various regions, especially key lakes and river basins, are also constantly increasing. Under the background that various discharge water quality indicators of sewage treatment are required to meet the standards continuously and stably and industry supervision is becoming increasingly strict, the total nitrogen in sewage has become an indicator that is difficult to control at this stage. The denitrification filter is a stable and reliable denitrification process technology in the field of deep treatment of urban domestic sewage.

[0003] In the prior art, the traditional denitrification deep bed filter adopts an upward flow filtration method, which is not only complex in structure but also has blind spots in backwashing. In addition, the upward flow design is prone to clogging the water and air distribution system and has higher requirements for backwashing. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art. The traditional denitrification deep bed filter adopts an upward flow filtration design, which is easy to clog the water and air distribution system, has higher requirements for backwashing, and is inconvenient and impractical.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a downward flow integrated denitrification biological filter device applied to domestic sewage, comprising a filter main body box and a pipe gallery, a support column is provided on the outside of the filter main body box, a pipe gallery is reserved between the support column and the filter main body box, the filter main body box is divided into an ultra-high area, a water distribution trough, a filtration head area, a filter bed, a supporting layer and a filter brick from top to bottom, a water distribution trough is provided with a plurality of equidistantly distributed water inlet pipe flange openings and a backwash drain pipe flange opening on one side of the water distribution trough close to the pipe gallery, and a plurality of equidistantly distributed backwash air inlet pipe flange openings and a backwash water inlet pipe flange openings are provided on the side of the filter brick close to the pipe gallery.

[0006] Optionally, the filter brick is a rectangular double-layer water and air distribution system, which includes a primary distribution chamber and a secondary compensation chamber. A backwash air inlet branch and a backwash water inlet branch are provided inside the primary distribution chamber. The backwash air inlet branch and the backwash water inlet branch are respectively connected to the outer backwash air inlet pipe flange and the backwash water inlet pipe flange.

[0007] Optionally, the gaps between the filter bricks, the filter tank main body box and the filter brick structure are all filled with C plain concrete.

[0008] Optionally, the flange opening of the backwash air inlet pipe and the flange opening of the backwash water inlet pipe are located in the same plane, and the backwash air inlet branch pipe and the backwash water inlet branch pipe are aligned vertically.

[0009] Optionally, the outer side plate of the super-high area is provided with an overflow pipe flange.

[0010] Optionally, the water inlet end of the water distribution tank is located on one side of the water inlet pipe flange and the backwash drain pipe flange, and the overflow end at the back is provided with an adjustable weir plate.

[0011] Optionally, a steel plate barrier is provided between every two grids of the super-high area, water distribution trough, filtration head area, filter bed, supporting layer and filter bricks.

[0012] Optionally, a crossbeam is provided between the support column and the filter tank main body box.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] In the utility model, when backwashing the pipeline, water is injected into the filter bricks, the supporting layer, the filter bed and the filter head area through the flange of the backwash inlet pipe in the reverse direction, and high-pressure air is injected into the flange of the backwash inlet pipe to stir the water body, thereby enhancing the cleaning efficiency, and finally the cleaned waste water is discharged through the flange of the backwash drain pipe. In addition, by arranging a plurality of through holes on the inner wall between the primary distribution chamber and the secondary compensation chamber, the blind area during the backwashing process is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a left view of a downward flow integrated denitrification biofilter device for domestic sewage provided by the utility model;

[0016] Figure 2 It is a right view of the filter tank main body box structure of a downward flow integrated denitrification biological filter tank device applied to domestic sewage provided by the utility model;

[0017] Figure 3 The utility model provides a cross-sectional structural schematic diagram of a filter brick structure of a downward flow integrated denitrification biological filter device for domestic sewage.

[0018] Legend:

[0019] 1. Filter tank body; 2. Pipe gallery; 3. Super height area; 4. Water distribution trough; 5. Filter head area; 6. Filter bed; 7. Supporting layer; 8. Filter bricks; 9. Adjustable weir plate; 10. Water inlet pipe flange; 11. Backwash drain pipe flange; 12. Backwash air inlet pipe flange; 13. Backwash water inlet pipe flange; 14. Overflow pipe flange; 15. Crossbeam; 16. Backwash air inlet branch pipe; 17. Backwash water inlet branch pipe; 18. Secondary compensation chamber; 19. Primary distribution chamber; 20. Plain concrete. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, the utility model provides a technical solution: a downward flow integrated denitrification biological filter device for domestic sewage, including a filter tank main body box 1 and a pipe gallery 2, a support column is arranged outside the filter tank main body box 1, and a pipe gallery 2 is reserved between the support column and the filter tank main body box 1. The filter tank main body box 1 is divided into an ultra-high area 3, a water distribution trough 4, a filtration head area 5, a filter bed 6, a supporting layer 7 and a filter brick 8 from top to bottom, and a plurality of equally spaced water inlet pipe flange ports 1 are arranged on one side of the water distribution trough 4 close to the pipe gallery 2. 0 and backwash drainage pipe flange 11, the filter brick 8 is provided with a plurality of equally distributed backwash air inlet pipe flanges 12 and backwash water inlet pipe flanges 13 on one side close to the pipe gallery 2, the filter brick 8 is a rectangular double-layer water and air distribution system, which includes a primary distribution chamber 19 and a secondary compensation chamber 18, and a backwash air inlet branch pipe 16 and a backwash water inlet branch pipe 17 are provided inside the primary distribution chamber 19, and the backwash air inlet branch pipe 16 and the backwash water inlet branch pipe 17 are respectively connected to the outer backwash air inlet pipe flange 12 and the backwash water inlet pipe flange 13.

[0023] In this embodiment, domestic sewage enters the water distribution tank 4 through the flange port 10 of the water inlet pipe, then goes down through the multi-layer filtration system of the filter head area 5, the filter bed 6, the support layer 7 and the filter brick 8, and is discharged through the flange port 13 of the backwash water inlet pipe, effectively removing impurities in the sewage. This downward flow filtration structure is simple and easy to maintain and repair. When backwashing the pipeline, water is injected into the filter brick 8, the support layer 7, the filter bed 6 and the filter head area 5 in the reverse direction through the flange port 13 of the backwash water inlet pipe, and high-pressure air is injected into the flange port 12 of the backwash air inlet pipe to stir the water body and enhance the cleaning efficiency. Finally, the cleaned wastewater is discharged through the flange port 11 of the backwash drain pipe. In addition, by setting a plurality of through holes on the inner wall between the primary distribution chamber 19 and the secondary compensation chamber 18, the blind area during the backwashing process is reduced.

[0024] In this embodiment, the downward flow integrated denitrification biofilter equipment has a single filter unit that processes 500 to 1000 m 3 / d, and its filtration area is 5~15m 2The water distribution tank 4 is located at the water inlet end, and the overflow side adopts an adjustable weir plate 9. The width of the filter tank is controlled at 2.5-3m to ensure uniform water distribution within the filtration area. The height of the filter bed 6 is 1.8-2.5m, and the particle size is 1.7-3.35mm, and the specific gravity is ≥2.6g / cm 3 , uniformity coefficient (K60) ≤ 1.35, sphericity ≥ 0.8, Mohs hardness > 6, acid solubility ≤ 3% of high-quality silica sand filter material, the supporting layer 7 is 0.3m ~ 0.35m high, and is composed of pebbles with a particle size range of 3.2 ~ 19.1mm.

[0025] The gaps between the filter brick 8 and the filter tank main body 1 and the filter brick 8 structure are filled with C30 plain concrete 20, the backwash air inlet pipe flange 12 and the backwash water inlet pipe flange 13 are located in the same plane, the backwash air inlet branch pipe 16 and the backwash water inlet branch pipe 17 are aligned up and down, and the external side panel of the super-high area 3 is provided with an overflow pipe flange 14.

[0026] In this embodiment, when too much domestic sewage is added to the water inlet pipe flange 10 , it can overflow from the overflow pipe flange 14 .

[0027] The water inlet end of the water distribution trough 4 is located on one side of the water inlet pipe flange 10 and the backwash drain pipe flange 11, and the overflow end on the back is provided with an adjustable weir plate 9, and steel plate barriers are provided between every two grids of the super-high area 3, the water distribution trough 4, the filtration head area 5, the filter bed 6, the supporting layer 7 and the filter bricks 8, and a crossbeam 15 is provided between the support column and the filter tank main body box 1.

[0028] In this embodiment, the cross beam 15 plays a reinforcing role.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A downward flow integrated denitrification biological filter device for domestic sewage, comprising a filter tank main body box (1) and a pipe gallery (2), wherein a support column is provided outside the filter tank main body box (1), and a pipe gallery (2) is reserved between the support column and the filter tank main body box (1), characterized in that: The filter tank main body box (1) comprises, from top to bottom, an ultra-high area (3), a water distribution trough (4), a filtering head area (5), a filter bed (6), a supporting layer (7) and a filter brick (8); the water distribution trough (4) is provided with a plurality of equally spaced water inlet pipe flange openings (10) and backwash drain pipe flange openings (11) on one side close to the pipe gallery (2); and the filter brick (8) is provided with a plurality of equally spaced backwash air inlet pipe flange openings (12) and backwash water inlet pipe flange openings (13) on one side close to the pipe gallery (2).

2. The downward flow integrated denitrification biofilter device for domestic sewage according to claim 1, characterized in that: The filter brick (8) is a rectangular double-layer water and air distribution system, which contains a primary distribution chamber (19) and a secondary compensation chamber (18). A backwash air inlet branch pipe (16) and a backwash water inlet branch pipe (17) are arranged inside the primary distribution chamber (19). The backwash air inlet branch pipe (16) and the backwash water inlet branch pipe (17) are respectively connected to the outer backwash air inlet pipe flange port (12) and the outer backwash water inlet pipe flange port (13).

3. The downward flow integrated denitrification biofilter device for domestic sewage according to claim 1, characterized in that: The gaps between the filter brick (8) and the filter tank main body box (1) as well as the filter brick (8) structure are filled with C30 plain concrete (20).

4. The downward flow integrated denitrification biofilter device for domestic sewage according to claim 2, characterized in that: The backwash air inlet pipe flange opening (12) and the backwash water inlet pipe flange opening (13) are located in the same plane, and the backwash air inlet branch pipe (16) and the backwash water inlet branch pipe (17) are aligned vertically.

5. The downward flow integrated denitrification biofilter device for domestic sewage according to claim 1, characterized in that: The outer side plate of the super-high area (3) is provided with an overflow pipe flange opening (14).

6. The downward flow integrated denitrification biofilter device for domestic sewage according to claim 1, characterized in that: The water inlet end of the water distribution tank (4) is located on one side of the water inlet pipe flange opening (10) and the backwash drain pipe flange opening (11), and an adjustable weir plate (9) is provided at the overflow end at the back.

7. The downward flow integrated denitrification biofilter device for domestic sewage according to claim 1, characterized in that: Steel plates are provided between each of the super-high area (3), the water distribution tank (4), the filtering head area (5), the filter bed (6), the supporting layer (7) and the filter bricks (8).

8. The downward flow integrated denitrification biofilter device for domestic sewage according to claim 1, characterized in that: A crossbeam (15) is provided between the support column and the filter tank main body box (1).

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