Sulfur-iron composite double-layer filter material denitrification filter tank

Abstract

The utility model discloses a sulfur-iron composite double-layer filter material denitrification filter tank, relates to the technical field of sewage treatment, and aims to solve the problems of pipeline blockage and filter material blockage and abrasion in the subsequent treatment process due to the existence of large particles in sewage in the conventional denitrification filter tank. The sulfur-iron denitrification filter tank comprises a filter tank body, a sulfur autotrophic denitrification structure, a middle water layer structure, an iron autotrophic denitrification structure, a pebble supporting layer and a sewage pretreatment filter tank, the sewage pretreatment filter tank comprises a pretreatment filter group and a limiting mounting structure, and the limiting mounting structure is fixedly connected to the interior of the filter tank body; the wrapping iron net structures are fixed at the upper ends and the lower ends of the sulfur autotrophic denitrification structure, the middle water layer structure, the iron autotrophic denitrification structure and the pebble supporting layer; the reverse cleaning water outlet pipeline is connected to the inner wall of the filter tank body through a flange; the sewage discharge pipeline is in flange connection with one end of the backwashing water outlet pipeline; the cleaning water inlet pipe and the flange are connected to the left side of the filter tank body.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sulfide-iron composite double-layer filter material denitrification filter tank. Background Art

[0002] The development of efficient and environmentally friendly nitrogen removal technology has become a research focus in the field of water treatment. Although traditional denitrification technology can remove nitrates from water, it is necessary to continuously add carbon sources to the wastewater when treating low carbon-nitrogen ratio (C / N) wastewater, resulting in high operating costs. At the same time, the amount of sludge produced in the traditional denitrification process is also large, which increases the difficulty and cost of treatment. In response to the above problems, researchers began to explore new denitrification technologies. The sulfur-iron composite double-layer filter media denitrification filter came into being in this context. This filter combines the advantages of sulfur autotrophic denitrification and iron autotrophic denitrification, and uses specific filter media and microbial populations to achieve efficient nitrogen removal in anoxic or micro-oxic environments.

[0003] However, the existing denitrification filter tanks, due to the presence of large particles in the sewage, cause pipe blockage during the subsequent treatment process, and also cause filter material blockage and wear; therefore, they do not meet existing needs. In this regard, we propose a sulfur-iron composite double-layer filter material denitrification filter tank. Utility Model Content

[0004] The utility model aims to provide a sulfide-iron composite double-layer filter media denitrification filter to solve the problem of existing denitrification filter proposed in the above background technology, which causes pipeline blockage and filter media blockage and wear during subsequent treatment due to the presence of large particles in sewage.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a sulfur-iron composite double-layer filter material denitrification filter, including a sulfur-iron denitrification filter, the sulfur-iron denitrification filter includes a filter body, a sulfur autotrophic denitrification structure, an intermediate water layer structure, an iron autotrophic denitrification structure, a pebble support layer, and a sewage pretreatment filter, and the sewage pretreatment filter includes a pretreatment filter group,

[0006] Also included:

[0007] A position limiting installation structure, fixedly connected to the interior of the filter tank body;

[0008] A fastening threaded structure, penetrating and connected to the position limiting mounting structure;

[0009] Wrapping the iron mesh structure, fixing it on the upper and lower ends of the sulfur autotrophic denitrification structure, the middle water layer structure, the iron autotrophic denitrification structure, and the pebble supporting layer to wrap them;

[0010] A backwash outlet pipe, flange-connected to the inner wall of the filter tank body;

[0011] A sewage discharge pipe, flange-connected to one end of the backwash outlet pipe;

[0012] A cleaning water inlet pipe, flange-connected to the left side of the filter tank body;

[0013] The support frame is fixedly connected to the lower end of the sewage pretreatment filter tank.

[0014] Preferably, a coarse grid is provided in the pretreatment filter group, and the coarse grid is fixedly connected to the pretreatment filter group, a fine grid is provided next to the coarse grid, and the fine grid is fixedly connected to the pretreatment filter group, a sand settling structure is provided next to the fine grid, and the sand settling structure is fixedly connected to the pretreatment filter group, a sand filter structure is provided next to the sand settling structure, and the sand filter structure is fixedly connected to the pretreatment filter group, an activated carbon filter is provided next to the sand filter structure, and the activated carbon filter is fixedly connected to the pretreatment filter group.

[0015] Preferably, a lifting ring structure is provided at the upper end of the pre-treatment filter group, and the lifting ring structure is fixedly connected to the upper end of the pre-treatment filter group.

[0016] Preferably, a partition wall is provided in the sewage pretreatment filter tank, and the partition wall is fixedly connected to the sewage pretreatment filter tank, a sewage inlet pipe is provided on one side of the partition wall, and the sewage inlet pipe is flange-connected to one side of the partition wall.

[0017] Preferably, a buffering flow-discharging structure is provided on the inner wall of the sewage pretreatment filter tank, and the buffering flow-discharging structure is fixedly connected to the inner wall of the sewage pretreatment filter tank.

[0018] Preferably, a sewage outlet pipe is provided on the other side of the sewage pretreatment filter tank, and the sewage outlet pipe is flange-connected to the other side of the sewage pretreatment filter tank, an electromagnetic flow valve is provided on the sewage outlet pipe, and the electromagnetic flow valve is flange-connected to the sewage outlet pipe, a drainage pump is provided at one end of the sewage outlet pipe, and the drainage pump is flange-connected to one end of the sewage outlet pipe, a drainage pipe is provided on the drainage pump, and the drainage pipe is flange-connected to the drainage pump.

[0019] Preferably, a primary unloading component is provided on the filter tank body, and the primary unloading component is fixedly connected to the filter tank body, a fixing bolt is provided on the primary unloading component, and the fixing bolt is connected through the primary unloading component, a unloading slope is provided on the primary unloading component, and the unloading slope and the primary unloading component are integrally formed.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The utility model provides a sewage pretreatment filter tank, a pretreatment filter group, a coarse grid, a fine grid, a sand settling structure, a sand filter structure, and an activated carbon filter, and the pretreatment filter group plays a vital role. The coarse grid and the fine grid are the primary links of pretreatment, and they jointly remove coarse suspended matter and fine particles in the incoming water, effectively reducing the risk of blockage in the subsequent treatment units and improving the stability of the entire system. The sand settling structure and the sand filter structure further remove sand and suspended matter in the water, ensuring that the water entering the denitrification filter tank is clear, reducing filter tank blockage, and extending the service life. The activated carbon filter utilizes the adsorption properties of activated carbon to remove harmful substances such as organic matter, odor, and heavy metals in the water, and also improves the biodegradability of the denitrification filter tank and promotes the denitrification reaction. The joint cooperation of the pretreatment components provides a strong guarantee for the efficient operation of the denitrification filter tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the iron-sulfur denitrification filter tank of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the sewage pretreatment filter tank of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the pre-treatment filter group of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the primary force-releasing component of the utility model;

[0026] In the figure: 1. Sulfur-iron denitrification filter tank; 2. Filter tank body; 3. Position-limiting installation structure; 4. Fastening thread structure; 5. Sulfur autotrophic denitrification structure; 6. Intermediate water layer structure; 7. Iron autotrophic denitrification structure; 8. Pebble supporting layer; 9. Wrapped iron mesh structure; 10. Backwash outlet pipe; 11. Sewage discharge pipe; 12. Washing water inlet pipe; 13. Sewage pretreatment filter tank; 14. Support frame; 15. Partition wall; 16. Pretreatment filter group; 17. Sewage inlet pipe; 18. Buffer unloading structure; 19. Drainage pipe; 20. Drainage pump; 21. Sewage outlet pipe; 22. Electromagnetic flow valve; 23. Lifting ring structure; 24. Coarse grid; 25. Fine grid; 26. Sand settling structure; 27. Sand filter structure; 28. Activated carbon filter; 29. ​​Primary unloading component; 291. Unloading slope; 292. Fixing bolts. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] See also Figure 1-4The utility model provides an embodiment: a sulfur-iron composite double-layer filter material denitrification filter, including a sulfur-iron denitrification filter 1, the sulfur-iron denitrification filter 1 includes a filter body 2, a sulfur autotrophic denitrification structure 5, an intermediate water layer structure 6, an iron autotrophic denitrification structure 7, a pebble support layer 8, a sewage pretreatment filter 13, and the sewage pretreatment filter 13 includes a pretreatment filter group 16,

[0029] Also included:

[0030] The limiting installation structure 3 is fixedly connected to the inside of the filter tank body 2;

[0031] The fastening thread structure 4 is connected through the position limiting installation structure 3;

[0032] Wrap the iron mesh structure 9 and fix it on the upper and lower ends of the sulfur autotrophic denitrification structure 5, the intermediate water layer structure 6, the iron autotrophic denitrification structure 7, and the pebble supporting layer 8 to wrap them;

[0033] The backwash outlet pipe 10 is flange-connected to the inner wall of the filter tank body 2;

[0034] A sewage discharge pipe 11 is flange-connected to one end of the backwash outlet pipe 10;

[0035] The cleaning water inlet pipe 12 is flange-connected to the left side of the filter tank body 2;

[0036] The support frame 14 is fixedly connected to the lower end of the sewage pretreatment filter tank 13 .

[0037] See also Figure 3 The pretreatment filter group 16 is provided with a coarse grid 24, and the coarse grid 24 is fixedly connected to the pretreatment filter group 16. A fine grid 25 is provided beside the coarse grid 24, and the fine grid 25 is fixedly connected to the pretreatment filter group 16. A sand settling structure 26 is provided beside the fine grid 25, and the sand settling structure 26 is fixedly connected to the pretreatment filter group 16. A sand filter structure 27 is provided beside the sand settling structure 26, and the sand filter structure 27 is fixedly connected to the pretreatment filter group 16. An activated carbon filter 28 is provided beside the sand filter structure 27, and the activated carbon filter 28 is fixedly connected to the pretreatment filter group 16. The setting of the coarse grid 24 and the fine grid 25 can effectively remove the coarse suspended matter and impurities in the incoming water, and prevent these substances from affecting the subsequent treatment process. The sand settling structure 26 and the sand filter structure 27 can further remove the sand and suspended matter in the water, ensuring that the water quality entering the denitrification filter tank meets the requirements. The activated carbon filter 28 can absorb organic matter and certain soluble impurities in the water, improve the biodegradability of the incoming water, and facilitate the denitrification reaction.

[0038] See also Figure 3A lifting ring structure 23 is provided at the upper end of the pre-treatment filter group 16, and the lifting ring structure 23 is fixedly connected to the upper end of the pre-treatment filter group 16, and the lifting ring structure 23 facilitates the pre-treatment filter group 16 to be lifted, replaced or repaired.

[0039] See also Figure 2 A partition wall 15 is provided in the sewage pretreatment filter tank 13, and the partition wall 15 is fixedly connected to the sewage pretreatment filter tank 13. A sewage inlet pipe 17 is provided on one side of the partition wall 15, and the sewage inlet pipe 17 is flange-connected to one side of the partition wall 15. The partition wall 15 plays a role of separation, and the sewage inlet pipe 17 facilitates the entry of sewage.

[0040] See also Figure 2 A buffer unloading structure 18 is provided on the inner wall of the sewage pretreatment filter 13, and the buffer unloading structure 18 is fixedly connected to the inner wall of the sewage pretreatment filter 13. The buffer unloading structure 18 can reduce the impact of water flow on the filter and protect the filter structure from being damaged.

[0041] See also Figure 2 A sewage outlet pipe 21 is arranged on the other side of the sewage pretreatment filter tank 13, and the sewage outlet pipe 21 is flange-connected to the other side of the sewage pretreatment filter tank 13; an electromagnetic flow valve 22 is arranged on the sewage outlet pipe 21, and the electromagnetic flow valve 22 is flange-connected to the sewage outlet pipe 21; a drainage pump 20 is arranged at one end of the sewage outlet pipe 21, and the drainage pump 20 is flange-connected to one end of the sewage outlet pipe 21; a drainage pipe 19 is arranged on the drainage pump 20, and the drainage pipe 19 is flange-connected to the drainage pump 20; the reasonable layout of the sewage inlet pipe 17 and the sewage outlet pipe 21 ensures the smooth inflow and outflow of water; the setting of the electromagnetic flow valve 22 can accurately control the water output; the drainage pump 20 and the drainage pipe 19 are responsible for discharging the treated water.

[0042] See also Figure 1 The filter tank body 2 is provided with a primary unloading member 29, and the primary unloading member 29 is fixedly connected to the filter tank body 2. The primary unloading member 29 is provided with a fixing bolt 292, and the fixing bolt 292 is connected through the primary unloading member 29. The primary unloading member 29 is provided with an unloading slope 291, and the unloading slope 291 and the primary unloading member 29 are integrally formed. The design of the primary unloading member 29 on the filter tank body 2 enhances the overall stability and safety of the filter tank. The fixing bolt 292 ensures the firm connection between the primary unloading member 29 and the filter tank body 2, and the unloading slope 291 can play a buffering role when subjected to external force impact, reducing damage to the filter tank structure.

[0043] Working principle: When in use, first, the sewage enters the sewage pretreatment filter 13 through the sewage inlet pipe 17, and then the sewage flows through the buffer discharge structure 18, which reduces the impact of the sewage flow on the sewage pretreatment filter 13 and protects the internal structure of the sewage pretreatment filter 13 from being damaged. Then the sewage passes through the coarse grid 24 and the fine grid 25 of the pretreatment filter group 16. These grids effectively remove coarse suspended matter and impurities to prevent them from entering the subsequent treatment process. Subsequently, the sewage passes through the sand settling structure 26 and the sand filter structure 27 to further remove sand and suspended matter to ensure that the water quality meets the requirements of the denitrification filter. The activated carbon filter 28 adsorbs organic matter and certain soluble impurities in the water, improves the biodegradability of the incoming water, and creates a more favorable environment for the denitrification reaction. The pretreated water enters the sulfide iron denitrification filter 1 through the drainage pump 20, the drainage pipe 19, and the sewage outlet pipe 21. Inside the filter tank, the sulfur autotrophic denitrification structure 5, the intermediate water layer structure 6, the iron autotrophic denitrification structure 7, and the pebble support layer 8 are passed in sequence. The sulfur autotrophic denitrification structure 5 and the iron autotrophic denitrification structure 7 use sulfur and iron as electron donors respectively to reduce nitrate to nitrogen gas under anoxic conditions. The sulfur autotrophic denitrifying bacteria use the electrons generated by sulfur oxidation to reduce nitrate and produce sulfate at the same time; while the iron autotrophic denitrifying bacteria use the iron oxidation process to provide electrons for denitrification reaction. The double-layer nitrification of the sulfur autotrophic denitrification structure 5 and the iron autotrophic denitrification structure 7 improves the denitrification efficiency and reduces the cost. The limited installation structure 3 and the fastening threaded structure 4 ensure the stability and reliability of the sulfur autotrophic denitrification structure 5, the intermediate water layer structure 6, the iron autotrophic denitrification structure 7, and the pebble support layer 8 inside the filter tank. The treated sewage is discharged through the sewage discharge pipe 11. After the filter tank has been running for a period of time, it needs to be cleaned to remove the accumulated impurities and restore the filtration performance. The cleaning water is introduced through the backwash outlet pipe 10, and the cleaning water source is provided by the cleaning water inlet pipe 12. The cleaning water flows in the reverse direction inside the sulfur-iron denitrification filter 1, and the accumulated impurities are washed away through the sulfur autotrophic denitrification structure 5, the intermediate water layer structure 6 and the iron autotrophic denitrification structure 7. The cleaned water is discharged from the filter through the sewage discharge pipe 11. During the entire operation process, the primary unloading component 29 on the filter body 2 plays a role in enhancing stability and safety. The unloading slope 291 plays a buffering role when impacted by external force, reducing damage to the filter structure.

[0044] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0045] The electrical components appearing in this article are all electrically connected to the external main controller and 220V AC power, and the main controller can be a conventional known device that controls servo motors, contact sensors, processors, alarm modules and drive modules. The standard parts used in this application document can all be purchased from the market, and the specific connection methods of each part are connected by conventional means such as mature bolts, rivets, welding, etc. in the prior art. In addition, the machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, so no specific description will be made here.

Claims

1. A sulfur-iron composite double-layer filter material denitrification filter, comprising a sulfur-iron denitrification filter (1), wherein the sulfur-iron denitrification filter (1) comprises a filter body (2), a sulfur autotrophic denitrification structure (5), an intermediate water layer structure (6), an iron autotrophic denitrification structure (7), a pebble support layer (8), and a sewage pretreatment filter (13), wherein the sewage pretreatment filter (13) comprises a pretreatment filter group (16), Features: Also included: A position limiting installation structure (3) fixedly connected inside the filter tank body (2); A fastening threaded structure (4) penetrating and connected to the position limiting mounting structure (3); The iron mesh structure (9) is wrapped and fixed to the upper and lower ends of the sulfur autotrophic denitrification structure (5), the intermediate water layer structure (6), the iron autotrophic denitrification structure (7), and the pebble supporting layer (8) to wrap them; A backwash outlet pipe (10) having a flange connected to the inner wall of the filter tank body (2); A sewage discharge pipe (11) having a flange connected to one end of the backwash outlet pipe (10); A cleaning water inlet pipe (12) flange-connected to the left side of the filter tank body (2); A support frame (14) is fixedly connected to the lower end of the sewage pretreatment filter tank (13).

2. The ferrous-sulfur composite double-layer filter material denitrification filter according to claim 1, characterized in that: The pretreatment filter group (16) is provided with a coarse grid (24), and the coarse grid (24) is fixedly connected to the pretreatment filter group (16); a fine grid (25) is provided next to the coarse grid (24), and the fine grid (25) is fixedly connected to the pretreatment filter group (16); a sand settling structure (26) is provided next to the fine grid (25), and the sand settling structure (26) is fixedly connected to the pretreatment filter group (16); a sand filter structure (27) is provided next to the sand settling structure (26), and the sand filter structure (27) is fixedly connected to the pretreatment filter group (16); an activated carbon filter (28) is provided next to the sand filter structure (27), and the activated carbon filter (28) is fixedly connected to the pretreatment filter group (16).

3. The ferrous-sulfur composite double-layer filter material denitrification filter according to claim 1, characterized in that: A lifting ring structure (23) is provided at the upper end of the pre-treatment filter group (16), and the lifting ring structure (23) is fixedly connected to the upper end of the pre-treatment filter group (16).

4. The ferrous-sulfur composite double-layer filter material denitrification filter according to claim 1, characterized in that: A partition wall (15) is provided in the sewage pretreatment filter tank (13), and the partition wall (15) is fixedly connected to the sewage pretreatment filter tank (13); a sewage inlet pipe (17) is provided on one side of the partition wall (15), and the sewage inlet pipe (17) is flange-connected to one side of the partition wall (15).

5. The ferrous-sulfur composite double-layer filter material denitrification filter according to claim 1, characterized in that: A buffer flow unloading structure (18) is provided on the inner wall of the sewage pretreatment filter tank (13), and the buffer flow unloading structure (18) is fixedly connected to the inner wall of the sewage pretreatment filter tank (13).

6. The ferrous-sulfur composite double-layer filter material denitrification filter according to claim 1, characterized in that: A sewage outlet pipe (21) is provided on the other side of the sewage pretreatment filter tank (13), and the sewage outlet pipe (21) is flange-connected to the other side of the sewage pretreatment filter tank (13); an electromagnetic flow valve (22) is provided on the sewage outlet pipe (21), and the electromagnetic flow valve (22) is flange-connected to the sewage outlet pipe (21); a drainage pump (20) is provided at one end of the sewage outlet pipe (21), and the drainage pump (20) is flange-connected to one end of the sewage outlet pipe (21); a drainage pipe (19) is provided on the drainage pump (20), and the drainage pipe (19) is flange-connected to the drainage pump (20).

7. The ferrous-sulfur composite double-layer filter material denitrification filter according to claim 1, characterized in that: A primary unloading component (29) is provided on the filter tank body (2), and the primary unloading component (29) is fixedly connected to the filter tank body (2); a fixing bolt (292) is provided on the primary unloading component (29), and the fixing bolt (292) is connected through the primary unloading component (29); a unloading slope (291) is provided on the primary unloading component (29), and the unloading slope (291) and the primary unloading component (29) are integrally formed.

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