Denitrification filter tank
By introducing side spray hoods and bottom spray hood structures into the denitrification filter and utilizing swirl spray plates and inclined spray plates, the low efficiency problem of the traditional stirring method is solved, full contact between sewage and filler is achieved, and the denitrification treatment effect is improved.
Patent Information
- Application Number
- CN202422273164.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-09-18
AI Technical Summary
The stirring method of traditional denitrification filter leads to increased dissolved oxygen or low mechanical stirring efficiency, which makes it difficult to effectively promote sufficient contact between sewage and filler, affecting the denitrification treatment effect.
The side spray hood and bottom spray hood structure are adopted to drive the sewage to flow in the denitrification filter through the circulation pump. The swirl spray plate and inclined spray plate design are used to suppress vortex and promote full contact between sewage and filler.
It improves the contact efficiency between sewage and filler, enhances the denitrification treatment effect, inhibits the generation of vortex, and avoids the increase of dissolved oxygen.
Smart Images
Figure CN223357483U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sewage treatment devices, in particular to a denitrification filter. Background Art
[0002] Total nitrogen is a key indicator in the effluent from sewage treatment plants. It is a major cause of eutrophication. To reduce total nitrogen in effluent, the current mainstream approach is to remove nitrate and nitrite, the main components of total nitrogen in the effluent, through denitrification (e.g., heterotrophic denitrification and anaerobic ammonium oxidation).
[0003] In the actual process of denitrification treatment in a traditional denitrification filter, in order to ensure the denitrification treatment effect of the sewage, it is usually necessary to stir the sewage in the tank body to keep the sewage in the tank body in a flowing state, so that the sewage and the filler can fully contact. The existing stirring methods mainly use two types of bottom aeration and mechanical stirring. The bottom aeration method increases the dissolved oxygen in the sewage. On the one hand, the increase in dissolved oxygen will consume the organic matter in the sewage, and on the other hand, it will inhibit denitrification. Although the mechanical stirring method can avoid the increase of dissolved oxygen in the sewage, the filler has a strong obstruction to the disturbance of water flow, resulting in a relatively low efficiency of mechanical stirring, making it difficult to achieve satisfactory results. In response to the above problems, this invention provides a denitrification filter. Utility Model Content
[0004] The purpose of the utility model is to provide a denitrification filter.
[0005] The above technical objectives of the present invention are achieved through the following technical solutions:
[0006] A denitrification filter comprises a reaction tank, a cover plate, a sewage inlet pipe, an overflow port and a sewage outlet, wherein the cover plate is closed on the top of the reaction tank, an inlet pump is installed on the sewage inlet pipe, the sewage outlet is arranged on the bottom side wall of the reaction tank, a sewage outlet cover plate is provided on the sewage outlet, an overflow slide is provided outside the overflow port, a plurality of evenly distributed side spray covers are provided on the inner side wall of the reaction tank, a bottom spray cover is provided at the middle position of the bottom of the reaction tank, and a plurality of side spray covers and one bottom spray cover are each provided with a spray hole, a circulation pipe is inserted on the cover plate, the circulation pipe is inserted into the interior of the reaction tank, and the other end is connected to a circulation pump, a multi-way connector is installed on the liquid outlet pipe of the circulation pump, and different interfaces of the multi-way connector are connected to different side spray covers and bottom spray covers through different pipelines.
[0007] Furthermore, the side surface of the side spray hood is composed of a swirl spray plate, an oblique spray plate and a baffle. The upper and lower ends of the side spray hood are closed. The swirl spray plate and the oblique spray plate are both provided with evenly distributed spray holes. The swirl spray plate is arranged perpendicular to the tangent of the arc of the reaction pool at its installation position. The angle between the oblique spray plate and the swirl spray plate is 120°, and the angle between the baffle and the oblique spray plate is 90°. One side of the baffle is connected to the pool wall of the reaction pool.
[0008] Furthermore, the bottom spray cover is a truncated cone structure, and the spray holes are arranged on the conical surface and the top surface of the bottom spray cover. The bottom spray cover can effectively limit the formation of vortex in the middle liquid and accelerate the contact between the liquid and the filler.
[0009] Furthermore, the number of the side spray hoods is three, and the number can be set according to the diameter of the reaction tank. If the diameter is larger, more side spray hoods should be set accordingly.
[0010] Furthermore, a filter cover is installed on the liquid suction end of the circulation pipe located in the reaction tank, and the filter cover can effectively absorb the filler and larger impurities.
[0011] In summary, the utility model has the following beneficial effects: the utility model can stir the sewage in the reaction tank by setting the side spray cover and the bottom spray cover structure, and the stirring can effectively suppress the generation of vortexes, so that the sewage and the filler can fully contact, thereby improving the reaction efficiency and treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0013] Figure 2 It is a cross-sectional view of the utility model;
[0014] Figure 3 yes Figure 2 A partial enlarged view of .
[0015] In the figure, 1. reaction tank; 2. side spray hood; 3. bottom spray hood; 4. cover plate; 5. sewage inlet pipe; 6. overflow port; 7. overflow slide; 8. filter cover; 9. circulation pipe; 10. circulation pump; 11. multi-way connector; 12. sewage outlet; 13. sewage cover plate; 14. spray hole; 15. liquid inlet pump; 16. connector; 17. swirl spray plate; 18. oblique spray plate; 19. baffle. DETAILED DESCRIPTION
[0016] The following is a further detailed description of the present invention in conjunction with the accompanying drawings, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0017] like Figure 1-3 As shown, a denitrification filter comprises a reaction tank 1, a cover plate 4, a sewage inlet pipe 5, an overflow port 6 and a sewage outlet 12, wherein the cover plate 4 is covered on the top of the reaction tank 1, a liquid inlet pump 15 is installed on the sewage inlet pipe 5, the sewage outlet 12 is arranged on the bottom side wall of the reaction tank 1, a sewage outlet cover 13 is provided on the sewage outlet 12, an overflow slide 7 is provided outside the overflow port 6, a plurality of evenly distributed side spray covers 2 are provided on the inner side wall of the reaction tank 1, a bottom spray cover 3 is provided in the middle position of the bottom of the reaction tank 1, and a plurality of side spray covers 2 and one bottom spray cover 3 are each provided with a spray hole 14, a circulation pipe 9 is inserted on the cover plate 4, the circulation pipe 9 is inserted into the interior of the reaction tank 1, and the other end is connected to the circulation pump 10, and a multi-way connector 11 is installed on the liquid outlet pipe of the circulation pump 10, and different interfaces of the multi-way connector 11 are connected to different side spray covers 2 and bottom spray covers 3 through different pipes.
[0018] Further, such as Figure 3 As shown, the side surface of the side spray cover 2 is composed of a swirl spray plate 17, an oblique spray plate 18 and a baffle 19. The upper and lower ends of the side spray cover 2 are closed. The swirl spray plate 17 and the oblique spray plate 18 are each provided with a uniformly distributed spray hole 14. The swirl spray plate 17 is perpendicular to the tangent of the arc of the reaction pool 1 at its installation position. The angle between the oblique spray plate 18 and the swirl spray plate 17 is 120°, and the angle between the baffle 17 and the oblique spray plate 18 is 90°. One side of the baffle 17 is connected to the pool wall of the reaction pool 1. The swirl spray plate 17 can spray water tangent to the circumference of the reaction pool 1, thereby making the overall water flow flow. The water sprayed by the oblique spray plate 18 can effectively increase the exchange of liquid outside and inside the reaction pool 1, thereby improving the mixing efficiency. The baffle 19 can effectively suppress eddy currents, which collide with the rotating water flow.
[0019] Further, such as Figure 2 As shown, the bottom spray cover 3 is a truncated cone structure, and the spray holes 14 are arranged on the conical surface and the top surface of the bottom spray cover 3. The bottom spray cover 3 can effectively limit the formation of vortex in the middle liquid and accelerate the contact between the liquid and the filler.
[0020] Further, such as Figure 2 As shown, there are three side spray hoods 2, and the number can be set according to the diameter of the reaction tank 1. If the diameter is larger, more side spray hoods will be set accordingly.
[0021] Further, such as Figure 1 As shown, a filter cover 8 is installed on the liquid suction end of the circulation pipe 9 located in the reaction tank 1. The filter cover 8 can effectively absorb the filler and larger impurities.
[0022] Working principle: The sewage to be treated is pumped into the reaction tank 1 from the sewage inlet pipe 5 through the liquid inlet pump 15, and the circulation pump 10 sprays the sewage from the side spray cover 2 and the bottom spray cover 3 through the circulation pipe, providing power for the sewage to flow in the tank. The sewage flows in the tank and fully contacts and reacts with the filler. The supernatant flows away from the overflow port 6 and the overflow slide 7. The mud and dirt deposited at the bottom of the reaction tank 1 are regularly cleaned from the sewage outlet 12.
[0023] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.
Claims
1. A denitrification filter, comprising a reaction tank (1), a cover plate (4), a sewage inlet pipe (5), an overflow port (6) and a sewage outlet (12), wherein the cover plate (4) is covered on the top of the reaction tank (1), and a liquid inlet pump (15) is installed on the sewage inlet pipe (5), characterized in that: The sewage outlet (12) is arranged on the bottom side wall of the reaction tank (1), and a sewage outlet cover (13) is provided on the sewage outlet (12). An overflow slide (7) is provided outside the overflow port (6). The inner side wall of the reaction tank (1) is provided with a plurality of evenly distributed side spray covers (2). A bottom spray cover (3) is provided at the middle position of the bottom of the reaction tank (1). The plurality of side spray covers (2) and one bottom spray cover (3) are each provided with a spray hole (14). A circulation pipe (9) is inserted on the cover (4). The circulation pipe (9) is inserted into the interior of the reaction tank (1), and the other end is connected to the circulation pump (10). A multi-way connector (11) is installed on the liquid outlet pipe of the circulation pump (10), and different interfaces of the multi-way connector (11) are connected to different side spray covers (2) and bottom spray covers (3) through different pipes.
2. A denitrification filter according to claim 1, characterized in that: The side of the side spray cover (2) is composed of a swirl spray plate (17), an oblique spray plate (18) and a baffle (19). The upper and lower ends of the side spray cover (2) are closed. The swirl spray plate (17) and the oblique spray plate (18) are both provided with uniformly distributed spray holes (14). The swirl spray plate (17) is perpendicular to the tangent of the arc of the reaction pool (1) at its installation position. The angle between the oblique spray plate (18) and the swirl spray plate (17) is 120°, and the angle between the baffle (19) and the oblique spray plate (18) is 90°. One side of the baffle (19) is connected to the pool wall of the reaction pool (1).
3. A denitrification filter according to claim 2, characterized in that: The bottom spray cover (3) has a truncated cone-shaped structure, and the spray holes (14) are arranged on the conical surface and the top surface of the bottom spray cover (3).
4. A denitrification filter according to claim 3, characterized in that: The number of the side spray covers (2) is three.
5. A denitrification filter according to claim 4, characterized in that: The circulation pipe (9) is provided with a filter cover (8) on the liquid suction end located in the reaction tank (1).