A sulfur autotrophic denitrification filter

Abstract

The application discloses a sulfur autotrophic denitrification filter tank, which comprises a tank body, a sulfur autotrophic denitrification biological filler layer, a filler supporting layer, a supporting layer assembly, a backwashing water distribution assembly and a backwashing gas distribution assembly. The sulfur autotrophic denitrification biological filler layer, the filler supporting layer and the supporting layer assembly are sequentially arranged in the tank body from top to bottom, and the backwashing water distribution assembly and the backwashing gas distribution assembly are symmetrically arranged on the two sides of the tank body. The backwashing water distribution assembly and the backwashing gas distribution assembly are arranged on the two sides of the supporting layer assembly. The application has the beneficial effects that the supporting filter plate is used in cooperation with the backwashing water distribution assembly and the backwashing gas distribution assembly to perform backwashing, and the service life of the supporting filter plate is long.

Description

Technical Field

[0001] This utility model belongs to the field of denitrification filter, and in particular relates to a sulfur autotrophic denitrification filter. Background Technology

[0002] The self-trophic filter media is a synthetic material, primarily composed of elemental sulfur, supplemented with substances that provide alkalinity and trace elements required by microorganisms. It is synthesized from components such as inorganic electron donors, electron conductors, bio-promoters, and activity stabilizers, replacing organic carbon sources to efficiently drive the biological denitrification process. No sludge / bacterial inoculum needs to be added during commissioning. Raw materials are controllable during production, with no release of heavy metals or organic matter, ensuring the safety of downstream river water use.

[0003] In sulfur autotrophic denitrification filters, the filter media is consumable and needs to be replenished. Furthermore, the support plate at the bottom of the support layer is usually a filter plate, which is also a consumable part with a short service life. Utility Model Content

[0004] In view of this, the present invention aims to provide a sulfur autotrophic denitrification filter to solve at least one technical problem in the background art.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A sulfur autotrophic denitrification filter includes a tank body, a sulfur autotrophic denitrification biological packing layer, a packing support layer, a support layer assembly, a backwash water distribution assembly, and a backwash air distribution assembly.

[0007] The sulfur autotrophic denitrification biological packing layer, packing support layer, and support layer are arranged sequentially from top to bottom in the tank body, while the backwash water distribution component and backwash air distribution component are symmetrically arranged on both sides of the tank body.

[0008] Furthermore, the backwash water assembly and the backwash air assembly are located on both sides of the support layer assembly.

[0009] Furthermore, the upper part of the pool is symmetrically provided with water inlet troughs on both sides, and the bottom of the water inlet troughs is provided with several evenly distributed water outlet holes.

[0010] Wastewater inlet pipes are installed on both sides of the inlet tank, and wastewater inlet valves are installed on the wastewater inlet pipes.

[0011] Furthermore, a water collection ditch is provided at the bottom of the pool, a support net is provided on the water collection ditch, the water collection ditch is connected to the water outlet pipe, and a water outlet valve is provided on the water outlet pipe;

[0012] Support columns are provided on both sides of the bottom of the pool.

[0013] Furthermore, the support layer assembly includes several support filter bricks placed sequentially, and the bottom of the support filter bricks is provided with several evenly distributed filter brick plates.

[0014] Furthermore, the filter bricks are provided with several first through holes;

[0015] The filter brick plate has several second through holes, and the number of filter brick plates is at least two.

[0016] Furthermore, the height of the sulfur autotrophic denitrification biological packing layer is 1.8~3m.

[0017] Furthermore, the thickness of the filler support layer is 400-550mm.

[0018] Furthermore, the backwashing water assembly includes a backwash water pipe, which is connected to a water source via a first connecting pipe, and a first valve is provided on the first connecting pipe;

[0019] The backwash pipe has several evenly distributed water distribution holes on the side away from the pool body.

[0020] Furthermore, the backwash air assembly includes a backwash air pipe, which is connected to an air source via a second connecting pipe, and a second valve is provided on the second connecting pipe;

[0021] The backflush pipe has several evenly distributed air distribution holes on the side away from the pool.

[0022] Compared with existing technologies, the sulfur autotrophic denitrification filter of this invention has the following advantages:

[0023] This utility model provides a support layer assembly within the filtration tank. The support layer assembly consists of several support filter plates. These support filter plates work in conjunction with the backwash water distribution assembly and the backwash air distribution assembly for backwashing. The support filter plates have a long service life and good filtration effect. Furthermore, the bottom is equipped with filter bricks, which provide support and have a good support effect. If the filter bricks become clogged or damaged and need to be replaced, only one filter brick needs to be replaced, saving costs.

[0024] This invention combines a backwashing cloth water assembly and a backwashing cloth air assembly for backwashing, resulting in a good backwashing effect.

[0025] This application allows water to enter through an inlet pipe and exit through an outlet, filtering out large particles of impurities and performing preliminary treatment of wastewater. Attached Figure Description

[0026] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0027] Figure 1 This is a schematic diagram of a sulfur autotrophic denitrification filter according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the supporting filter brick and filter brick plate according to an embodiment of the present utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Inlet tank; 2. Outlet hole; 3. Wastewater inlet pipe; 4. Wastewater inlet valve; 5. Collection ditch; 6. Support net; 7. Outlet pipe; 8. Outlet valve; 9. Support filter bricks; 10. Sulfate autotrophic denitrification biological packing layer; 11. Packing support layer; 12. Backwash water pipe; 13. First connecting pipe; 14. First valve; 15. Water distribution hole; 16. Backwash air pipe; 17. Second connecting pipe; 18. Second valve; 19. Air distribution hole; 20. Support column; 21. Tank body; 22. First through hole; 23. Filter brick plate; 24. Second through hole. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] like Figures 1 to 2 As shown, a sulfur autotrophic denitrification filter includes a tank body 21, a sulfur autotrophic denitrification biological packing layer 10, a packing support layer 11, a support layer assembly, a backwash water distribution assembly, and a backwash air distribution assembly. The sulfur autotrophic denitrification biological packing layer 10, the packing support layer 11, and the support layer assembly are arranged sequentially from top to bottom within the tank body 21. The backwash water distribution assembly and the backwash air distribution assembly are symmetrically arranged on both sides of the tank body 21. The backwash water distribution assembly and the backwash air distribution assembly are arranged on both sides of the support layer assembly.

[0036] The upper part of the pool body 21 is symmetrically provided with water inlet troughs 1 on both sides, and the bottom of the water inlet troughs 1 is provided with several evenly distributed water outlet holes 2; both sides of the water inlet troughs 1 are provided with wastewater inlet pipes 3, and wastewater inlet valves 4 are provided on the wastewater inlet pipes 3.

[0037] The bottom of the pool body 21 is provided with a water collection ditch 5, and a support net 6 is provided on the water collection ditch 5. The water collection ditch 5 is connected to the water outlet pipe 7, and a water outlet valve 8 is provided on the water outlet pipe 7. Support columns 20 are provided on both sides of the bottom of the pool body 21.

[0038] The support layer assembly includes several sequentially placed support filter bricks 9, and several evenly distributed filter brick plates 23 are provided at the bottom of the support filter bricks 9. Several first through holes 22 are provided on the support filter bricks 9; several second through holes 24 are provided on the filter brick plates 23, and the number of filter brick plates 23 is at least two.

[0039] The height of the sulfur autotrophic denitrification biological packing layer 10 is 1.8~3m.

[0040] The thickness of the filler support layer 11 is 400-550mm.

[0041] The backwash water distribution assembly includes a backwash water pipe 12, which is connected to a water source via a first connecting pipe 13. A first valve 14 is provided on the first connecting pipe 13. Several evenly distributed water distribution holes 15 are provided on the side of the backwash water pipe 12 away from the pool body 21. The water distribution holes 15 are inclined upwards at an angle of 45°.

[0042] The backwash air distribution assembly includes a backwash air pipe 16, which is connected to an air source via a second connecting pipe 17. A second valve 18 is provided on the second connecting pipe 17. Several evenly distributed air distribution holes 19 are provided on the side of the backwash air pipe 16 away from the tank body 21. The water distribution holes 15 are inclined upward at an angle of 45°.

[0043] In practical implementation, sulfur-based self-trophic carrier filter media typically has a filter bed height of 1.8-3m, an effective particle size of 1-6mm, a porosity of 41.4%, and a specific surface area of ​​0.87m². 2 / g, compressive strength of cylinder: not less than 6MPa, bulk density: approximately 1.2t / m³ 3 Acid solubility: not exceeding 0.5%.

[0044] The filter media support layer 11 includes a layer of pebbles and quartz sand. The pebbles have a diameter of 3-38 mm and are graded in five stages. A 2-4 mm quartz sand layer is added to prevent filter media loss. The backwash water pipe 12 and backwash air pipe 16 are rectangular and fit with the support layer assembly. The position of the second through hole 24 corresponds to the positions of the backwash water hole and the backwash air hole.

[0045] In practice, NaHCO3 is added to a sulfur autotrophic denitrification filter to maintain the pH of the influent between 8 and 9. Adjusting the pH with NaHCO3 helps maintain a suitable pH in the water, providing good buffering capacity and offering an inorganic carbon source for bacteria, thus promoting biofilm formation.

[0046] In practical use, the wastewater inlet valve 4 is opened, and wastewater begins to enter through the wastewater inlet pipe 3. The wastewater enters the tank 21 through the outlet hole 2, which performs preliminary filtration. The wastewater undergoes denitrification with the sulfur autotrophic denitrification biological packing layer 10, thereby reducing the sulfur and nitrogen content in the wastewater. After passing through the support layer and filter bricks 9, it enters the collection ditch 5. The treated wastewater is discharged through the outlet pipe 7, at which point the outlet valve 8 is opened. Backwashing is divided into water washing, air washing, and combined water-air backwashing. During water washing, the first valve 14 is open and the second valve 18 is closed; during air washing, the second valve 18 is open and the first valve 14 is closed; during combined water-air backwashing, the first valve 14 and the second valve 18 are opened simultaneously. First, air wash for 2-3 minutes, then combined water-air backwashing for 10-15 minutes, and finally water washing for 3-5 minutes. The backwashing time can be adjusted according to the degree of filter clogging.

[0047] 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 sulfur-autotrophic denitrification filter, characterized in that: This includes the tank body, the sulfur autotrophic denitrification biological packing layer, the packing support layer, the support layer assembly, the backwash water distribution assembly, and the backwash air distribution assembly; The sulfur autotrophic denitrification biological packing layer, packing support layer, and support layer components are arranged sequentially from top to bottom in the tank, and the backwash water distribution component and backwash air distribution component are arranged on both sides of the support layer component. The bottom of the pool is equipped with a water collection ditch, and a support net is installed on the water collection ditch. The water collection ditch is connected to the water outlet pipe, and the water outlet pipe is equipped with a water outlet valve. Support columns are provided on both sides of the bottom of the pool. The support layer assembly includes several support filter bricks placed in sequence, and several evenly distributed filter brick plates are provided at the bottom of the support filter bricks; The filter bricks are provided with several first through holes; The filter brick plate has several second through holes, and the number of filter brick plates is at least two; The backwashing water assembly includes a backwash water pipe, which is connected to a water source via a first connecting pipe, and a first valve is provided on the first connecting pipe. The backwash pipe has several evenly distributed water distribution holes on the side away from the pool body; The backwash air assembly includes a backwash air pipe, which is connected to an air source via a second connecting pipe, and a second valve is provided on the second connecting pipe. The backflush pipe has several evenly distributed air distribution holes on the side away from the pool.

2. The sulfur autotrophic denitrification filter according to claim 1, characterized in that: The upper part of the pool is symmetrically equipped with water inlet troughs on both sides, and the bottom of the water inlet troughs is equipped with several evenly distributed water outlet holes. Wastewater inlet pipes are installed on both sides of the inlet tank, and wastewater inlet valves are installed on the wastewater inlet pipes.

3. The sulfur autotrophic denitrification filter according to claim 1, characterized in that: The height of the sulfur autotrophic denitrification biological packing layer is 1.8~3m.

4. The sulfur autotrophic denitrification filter according to claim 1, characterized in that: The thickness of the filler support layer is 400-550mm.

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