CN212425578U - Denitrification biological filter for secondary treatment of dredged residual water and filtering system - Google Patents
Denitrification biological filter for secondary treatment of dredged residual water and filtering system Download PDFInfo
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- CN212425578U CN212425578U CN202020325962.5U CN202020325962U CN212425578U CN 212425578 U CN212425578 U CN 212425578U CN 202020325962 U CN202020325962 U CN 202020325962U CN 212425578 U CN212425578 U CN 212425578U
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Abstract
The utility model discloses a denitrification biological filter and a filtering system for the secondary treatment of dredged residual water, wherein an overflow weir, a suspended packing layer, a filter material layer, a supporting layer and a water and gas distribution area are arranged in a tank body from top to bottom, a water outlet is arranged at one side close to the top of the tank body, and a water inlet and an aeration inlet are arranged at the lower part of the tank body; the suspended filler layer is filled with suspended fillers; the filter material layer is filled with high-quality silica sand; the supporting layer is formed by paving upper, middle and lower layers of cobblestones and is used for supporting the filter material layer, and the particle sizes of the upper, middle and lower layers of cobblestones are gradually increased; the supporting layer is supported by a supporting plate, a plurality of through holes convenient for dredging residual water to pass through are formed on the supporting plate, a plurality of aeration heads are arranged on the supporting plate, and the aeration heads are connected with a fan through a pipeline and an aeration inlet; the space between the supporting plate and the pool bottom forms a water and gas distribution area; the water inlet is connected with a water inlet pipeline. The device has the advantages of small occupied area, large treatment scale, high efficiency, stability and low operation cost.
Description
Technical Field
The utility model relates to a dredge surplus water secondary treatment field, especially relate to a denitrification biological filter and filtration system for dredging surplus water secondary treatment.
Background
The denitrification biofilter treatment process is used for deep filtration in sewage treatment and originated in the United states in the 70 s of the 20 th century. The treatment process has centralized functions and flexible operation, and can simultaneously play a role in physically filtering and intercepting suspended matters (SS), chemically micro-flocculating to remove Total Phosphorus (TP) and biologically denitrifying to remove Total Nitrogen (TN).
The existing denitrification biological filter needs to be stopped for backwashing after running for a period of time, and backwashing is generally divided into three stages: air flushing, water flushing and water flushing, and also needs to perform back purging on the gas collection system, so that the process is complicated, the treatment efficiency is low, and the operation cost is high.
Disclosure of Invention
For solving the deficiencies existing in the prior art, the utility model aims to provide a denitrification biological filter for the secondary treatment of dredged residual water, which has the advantages of simple operation, higher treatment efficiency and stable operation.
The utility model discloses another aim at provide a denitrification biological filtration system for dredging surplus water secondary treatment.
Therefore, the technical scheme of the utility model is as follows:
the utility model provides a denitrification biological filter for dredging surplus water secondary treatment, top-down is provided with overflow weir, suspended packing layer, filter material layer, supporting layer and water distribution gas distribution district in the cell body, is close to cell body top one side and is provided with the delivery port, and the cell body lower part is provided with water inlet and aeration entry, wherein: the overflow weir is used for enabling the clean water in the tank body after the secondary treatment higher than the overflow weir to flow out of the water outlet; the suspended filler layer is filled with suspended fillers which are used as active carriers of microorganisms; the filter material layer is filled with high-quality silica sand, the silica content is at least 95%, and the filter material layer is used for adsorbing harmful ions in a water body; the supporting layer is formed by paving upper, middle and lower layers of cobblestones and is used for supporting the filter material layer, and the particle sizes of the upper, middle and lower layers of cobblestones are gradually increased; the supporting layer is supported by a supporting plate, a plurality of through holes convenient for dredging residual water to pass through are formed in the supporting plate, a plurality of aeration heads are mounted on the supporting plate, and the aeration heads are connected with a fan through pipelines and an aeration inlet and are used for conveying air into the tank body and blowing away nitrogen generated by nitration reaction; the space between the supporting plate and the pool bottom forms the water and gas distribution area; the water inlet is connected with a water inlet pipeline and is used for inputting the dredged residual water after primary treatment, a carbon source or clean water after secondary treatment into the tank body.
Preferably, in the supporting layer, the thickness of the upper layer is 60-100 mm, the thickness of the middle layer is 90-150 mm, the thickness of the bottom layer is 50-200 mm, the cobblestones with the thickness of 25.0mm multiplied by 16.0mm are paved on the lower layer, the cobblestones with the thickness of 16.0mm multiplied by 8.0mm are paved on the middle layer, and the cobblestones with the thickness of 8.0mm multiplied by 4.0mm are paved on the upper layer. In one embodiment of the present invention, the thickness of the supporting layer is 200 mm.
Preferably, the thickness of the suspended filler layer is 200-300 mm, the thickness of the filter material layer is 300-500 mm, the thickness of the water and gas distribution area is 500-600 mm, and the distance from the top of the suspended filler layer to the top of the nitrification filter tank is 300-400 mm.
The tank body is of a reinforced concrete or steel structure and is cuboid or cylindrical in shape. In an embodiment of the present invention, the tank body is a cylinder with an outer diameter of 800 mm.
The overflow weir extends inwards from the circumferential direction of the inner wall of the tank body and then extends upwards.
The utility model provides a dredge denitrification biological filtration system of surplus water secondary treatment, includes foretell denitrification biological filter and the elevator pump of intaking, carbon source dosing bucket, clean water basin and fan that are used for dredging surplus water secondary treatment, wherein: the water inlet lifting pump is connected with a water inlet at the bottom of the denitrification filter tank through the water inlet pipeline and is used for conveying dredged residual water after primary treatment; the carbon source dosing barrel is used for storing a carbon source for denitrification and is connected with the water inlet pipeline through a pipeline; the clean water tank is used for storing the clean water treated by the denitrification filter; the fan is used for blowing air into the tank body.
Preferably, the system further comprises a backwashing pipeline for backwashing the denitrification biological filter and a backwashing pump installed on the backwashing pipeline, wherein one end of the backwashing pipeline is connected with the water inlet pipeline, and the other end of the backwashing pipeline is connected with the bottom of the clean water tank. The backwashing pump is used for cleaning the tank body after long-time operation.
In addition, control valves are arranged on the carbon source conveying pipeline, the water inlet pipeline and the backwashing pipeline. In one embodiment of the present invention, the carbon source used is sodium acetate with a purity of 60%.
The utility model discloses a dredge depth treatment that residual water secondary treatment's denitrification biological filter and filtration system were used for dredging residual water, it has following beneficial effect:
1. the operation and control are simple, the treatment capacity is strong under the condition of adapting to the changing process, the treatment effect is stable, and backwashing is generally not needed.
2. The denitrification biological filter tank has the advantages of small floor area, large treatment scale, three-dimensional structure, compact structure, no accessory device, no building and the like, and large treatment capacity which can reach 20 ten thousand tons per day.
3. The denitrification biological filter has high treatment efficiency, higher inlet water concentration and purer outlet water effect, can effectively remove TN, BOD, ammonia nitrogen and suspended solids, and the treated water reaches the ground surface 5-class water standard; the denitrification efficiency is high, and the aim of denitrification can be effectively fulfilled by supplementing a carbon source.
4. High efficiency and stability: because the filtered sand can be cleaned and self-cleaned rapidly in continuous circulation, the sand filtration can obtain continuous and stable high efficiency, the continuity and stability of the effluent quality are ensured, and simultaneously, higher load of inflow suspended matters can be born.
5. The maintenance is few, and the suitability is strong: because the whole sand filter has no running part, the requirement of maintenance is less, and the applicability is strong. The system runs continuously without stopping machine for inspection and back washing at ordinary times, and the process is suitable for physical and chemical treatment or biological treatment.
Drawings
FIG. 1 is a schematic diagram of the composition of the denitrification biofiltration system of the present invention;
FIG. 2 is a schematic plan view of an embodiment of a denitrification biofiltration system using the present invention;
wherein:
1. a water inlet valve 2, a carbon source dosing barrel 3, a fan 4, an aeration valve 5 and a bearing layer
6. Filter material layer 7, suspended filler layer 8, overflow weir 9, clean water tank 10 and backwashing pump
11. A backwashing water valve 12, a denitrification biological filter 13, a water distribution and distribution chamber 14, a water outlet 15 and a supporting plate
16. Aeration head
Detailed Description
The denitrification biofilter and the denitrification biofilter system of the present invention will be described in detail with reference to fig. 1 and 2 and examples.
Referring to the drawings, the utility model discloses a denitrification biological filter for dredging surplus water secondary treatment, top-down is provided with overflow weir 8, suspended packing layer 7, filtering material layer 6, supporting layer 5 and water distribution gas distribution district 13 in the cell body, is close to cell body top one side and is provided with delivery port 14, and the cell body lower part is provided with water inlet (not shown in the figure) and aeration entry (not shown in the figure), wherein:
the overflow weir 8 is formed by extending inwards from the circumferential direction of the inner wall of the tank body below the water outlet 14 and then extending upwards, and is used for enabling the clean water in the tank body after the secondary treatment higher than the overflow weir to flow out from the water outlet.
The suspended filler layer 7 is filled with suspended fillers which are used as active carriers of microorganisms, so that the microorganisms are enriched on the surface of the suspended fillers, and the dredged residual water is purified under the action of the microorganisms.
The filter material layer 6 is filled with high-quality silica sand, the silica content is at least 95%, and the filter material layer is used for adsorbing harmful ions in water.
The supporting layer 5 is formed by paving upper, middle and lower layers of cobblestones and is used for supporting the filter material layer, and the particle sizes of the upper, middle and lower layers of cobblestones are gradually increased. Wherein the thickness of the upper layer is 60-100 mm, the thickness of the middle layer is 90-150 mm, and the thickness of the bottom layer is 50-200 mm.
In one embodiment of the utility model, the lower layer is paved with cobblestones of 25.0mm × 16.0mm, the middle layer is paved with cobblestones of 16.0mm × 8.0mm, and the upper layer is paved with cobblestones of 8.0mm × 4.0 mm; the thickness of the supporting layer is 200 mm.
The supporting layer is supported by a supporting plate 15, a plurality of through holes (not shown) convenient for dredging residual water to pass through are formed in the supporting plate 15, a plurality of aeration heads 16 are installed on the supporting plate 15, and the aeration heads 16 are connected with a fan 3 through pipelines and aeration inlets and are used for conveying air into the tank body and blowing away nitrogen generated by nitration reaction.
The space between the supporting plate 15 and the bottom of the tank forms a water and gas distribution area 13. The water inlet is connected with a water inlet pipeline and is used for inputting the dredged residual water after primary treatment, a carbon source or clean water after secondary treatment into the tank body.
The thickness of the suspended filler layer 7 is generally 200-300 mm, the thickness of the filter material layer 6 is 300-500 mm, the thickness of the water and gas distribution area is 500-600 mm, and the distance from the top of the suspended filler layer 7 to the top of the nitrification filter tank is 300-400 mm.
The denitrification biological filter 12 can be of a reinforced concrete or steel structure and is rectangular or cylindrical in appearance. In an embodiment of the present invention, the tank body is a cylinder with an outer diameter of 800 mm.
The utility model discloses a dredge residual water secondary treatment's denitrification biofiltration system, including foretell denitrification biofilter 12 and intake elevator pump (not shown in the figure), carbon source dosing barrel 2, clean water basin 9 and fan 3. Wherein: the water inlet lifting pump is connected with a water inlet at the bottom of the denitrification filter tank through the water inlet pipeline and is used for conveying dredged residual water after primary treatment; the carbon source dosing barrel 2 is used for storing a carbon source for denitrification and is connected with the water inlet pipeline through a pipeline; the clean water tank 9 is used for storing the clean water treated by the denitrification filter; and the fan 3 is used for blowing air into the tank body.
In addition, the system also comprises a backwashing pipeline for backwashing the denitrification biological filter and a backwashing pump 10 arranged on the backwashing pipeline, wherein one end of the backwashing pipeline is connected with the water inlet pipeline, and the other end of the backwashing pipeline is connected with the bottom of the clean water tank 9. The backwashing pump is used for cleaning the tank body after long-time operation.
And control valves are arranged on the carbon source conveying pipeline, the water inlet pipeline and the backwashing pipeline. In one embodiment of the present invention, the carbon source used is sodium acetate, which is stored in the carbon source dosing tank 2 in the form of a solution.
Claims (9)
1. A denitrification biological filter for secondary treatment of dredged residual water is characterized in that: an overflow weir, a suspended packing layer, a filter material layer, a bearing layer and a water and gas distribution area are arranged from top to bottom in the tank body, a water outlet is arranged on one side close to the top of the tank body, and a water inlet and an aeration inlet are arranged on the lower part of the tank body, wherein:
the overflow weir is used for enabling the clean water in the tank body after the secondary treatment higher than the overflow weir to flow out of the water outlet;
the suspended filler layer is filled with suspended fillers which are used as active carriers of microorganisms;
the filter material layer is filled with high-quality silica sand and is used for adsorbing harmful ions in a water body;
the supporting layer is formed by paving upper, middle and lower layers of cobblestones and is used for supporting the filter material layer, and the particle sizes of the upper, middle and lower layers of cobblestones are gradually increased;
the supporting layer is supported by a supporting plate, a plurality of through holes convenient for dredging residual water to pass through are formed in the supporting plate, a plurality of aeration heads are mounted on the supporting plate, and the aeration heads are connected with a fan through pipelines and an aeration inlet and are used for conveying air into the tank body and blowing away nitrogen generated by nitration reaction;
the space between the supporting plate and the pool bottom forms the water and gas distribution area;
the water inlet is connected with a water inlet pipeline and is used for inputting dredged residual water after dredging and dewatering treatment, a carbon source or clean water after secondary treatment into the tank body.
2. The denitrification biofilter for secondary treatment of dredged residual water according to claim 1, characterized in that: in the supporting layer, the thickness of the upper layer is 60-100 mm, the thickness of the middle layer is 90-150 mm, the thickness of the bottom layer is 50-200 mm, the cobblestones with the thickness of 25.0mm multiplied by 16.0mm are laid on the lower layer, the cobblestones with the thickness of 16.0mm multiplied by 8.0mm are laid on the middle layer, and the cobblestones with the thickness of 8.0mm multiplied by 4.0mm are laid on the upper layer.
3. The denitrification biofilter for secondary treatment of dredged residual water according to claim 2, characterized in that: the thickness of the supporting layer is 200 mm.
4. The denitrification biofilter for secondary treatment of dredged residual water according to claim 1, characterized in that: the thickness of the suspended filler layer is 200-300 mm, the thickness of the filter material layer is 300-500 mm, the thickness of the water and gas distribution area is 500-600 mm, and the distance from the top of the suspended filler layer to the top of the nitrification filter tank is 300-400 mm.
5. The denitrification biofilter for secondary treatment of dredged residual water according to claim 1, characterized in that: the tank body is of a reinforced concrete or steel structure and is cuboid or cylindrical in shape.
6. The denitrification biofilter for secondary treatment of dredged residual water according to claim 1, characterized in that: the overflow weir extends inwards from the circumferential direction of the inner wall of the tank body and then extends upwards.
7. A denitrification biological filtration system for secondary treatment of dredged residual water is characterized in that: comprising the denitrification biofilter for the secondary treatment of the dredged residual water according to any one of claims 1 to 5, and a feed water lift pump, a carbon source dosing tank, a clean water tank and a blower, wherein:
the water inlet lifting pump is connected with a water inlet at the bottom of the denitrification filter tank through the water inlet pipeline and is used for conveying dredged residual water after primary treatment;
the carbon source dosing barrel is used for storing a carbon source for denitrification and is connected with the water inlet pipeline through a pipeline;
the clean water tank is used for storing the clean water treated by the denitrification filter;
the fan is used for blowing air into the tank body.
8. The denitrification biofiltration system for the secondary treatment of dredged residual water as claimed in claim 7, wherein: the device is characterized by further comprising a backwashing pipeline and a backwashing pump, wherein the backwashing pipeline is used for backwashing the denitrification biological filter, one end of the backwashing pipeline is connected with the water inlet pipeline, and the other end of the backwashing pipeline is connected with the bottom of the clean water tank.
9. The denitrification biofiltration system for the secondary treatment of dredged residual water as claimed in claim 8, wherein: and control valves are arranged on the water inlet pipeline and the backwashing pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020325962.5U CN212425578U (en) | 2020-03-16 | 2020-03-16 | Denitrification biological filter for secondary treatment of dredged residual water and filtering system |
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| CN202020325962.5U CN212425578U (en) | 2020-03-16 | 2020-03-16 | Denitrification biological filter for secondary treatment of dredged residual water and filtering system |
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| CN212425578U true CN212425578U (en) | 2021-01-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115093094A (en) * | 2022-08-01 | 2022-09-23 | 交通运输部天津水运工程科学研究所 | Dredged soil mud collecting pond based on waterway regulation and control and using method thereof |
| CN115286098A (en) * | 2022-07-04 | 2022-11-04 | 常州市深水江边污水处理有限公司 | Denitrification filter tank system |
-
2020
- 2020-03-16 CN CN202020325962.5U patent/CN212425578U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115286098A (en) * | 2022-07-04 | 2022-11-04 | 常州市深水江边污水处理有限公司 | Denitrification filter tank system |
| CN115093094A (en) * | 2022-08-01 | 2022-09-23 | 交通运输部天津水运工程科学研究所 | Dredged soil mud collecting pond based on waterway regulation and control and using method thereof |
| CN115093094B (en) * | 2022-08-01 | 2023-10-31 | 交通运输部天津水运工程科学研究所 | Dredged soil and mud receiving pond based on waterway regulation and control and using method thereof |
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