CN219752060U - Arrangement structure of nitrifying liquid reflux hydraulic stirring and mixing denitrification region - Google Patents
Arrangement structure of nitrifying liquid reflux hydraulic stirring and mixing denitrification region Download PDFInfo
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- CN219752060U CN219752060U CN202321297876.8U CN202321297876U CN219752060U CN 219752060 U CN219752060 U CN 219752060U CN 202321297876 U CN202321297876 U CN 202321297876U CN 219752060 U CN219752060 U CN 219752060U
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- nitrifying liquid
- denitrification
- liquid reflux
- water distribution
- region
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- 239000007788 liquid Substances 0.000 title claims abstract description 98
- 230000001546 nitrifying effect Effects 0.000 title claims abstract description 90
- 238000010992 reflux Methods 0.000 title claims abstract description 54
- 238000003756 stirring Methods 0.000 title claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 92
- 239000010865 sewage Substances 0.000 claims abstract description 31
- 239000000945 filler Substances 0.000 claims description 22
- 229910052799 carbon Inorganic materials 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model provides an arrangement structure of a nitrifying liquid reflux hydraulic stirring and mixing denitrification region, which comprises a denitrification region, wherein a sewage water inlet, a sewage water outlet and a nitrifying liquid reflux inlet are arranged on the denitrification region, a water distribution stirring pipe for water distribution and hydraulic stirring is arranged at the bottom in the denitrification region, the water distribution stirring pipe is connected with the nitrifying liquid reflux inlet, a nitrifying liquid reflux pipeline is arranged outside the denitrification region, one end of the nitrifying liquid reflux pipeline is connected with the nitrifying liquid reflux inlet of the denitrification region, the other end of the nitrifying liquid reflux pipeline is connected with a nitrifying liquid reflux outlet at the tail end of an aerobic tank, and a nitrifying liquid reflux pump is arranged on the nitrifying liquid reflux pipeline. According to the utility model, the nitrifying liquid in the aerobic tank is returned to the water distribution stirring pipe at the bottom of the denitrification zone, the water distribution stirring pipe is used for carrying out water distribution of the returned nitrifying liquid and hydraulic mixing stirring on the denitrification zone, the surplus water head of the nitrifying liquid return pump can be fully utilized to replace a stirrer, the whole section of the denitrification zone is efficiently and uniformly mixed and stirred, and the denitrification effect is improved.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, and particularly relates to an arrangement structure of a nitrifying liquid reflux hydraulic stirring and mixing denitrification region.
Background
The sewage treatment has high requirement on nitrogen and phosphorus removal, and many sewage treatment plants in China face the problem that total nitrogen in effluent cannot reach the standard. To date, only biological denitrification has been the most cost effective method for sewage denitrification. The anoxic denitrification has better effect, and needs to have various proper conditions such as carbon sources, denitrifying bacteria groups, anoxic environment and the like required by denitrification, and simultaneously, the denitrification area is uniformly mixed to create good biochemical reaction conditions.
Therefore, in order to obtain a better denitrification effect, the anoxic zone needs to be sufficiently well mixed and stirred, and the anoxic tank is often stirred and mixed by a submersible stirrer and the like, but the uniform mixing of the cross section of the whole water tank is difficult to realize, so that the tank capacity cannot be sufficiently utilized, and meanwhile, the energy consumption is large and the like. For small-scale sewage treatment plant stations, the method has the characteristic of large fluctuation of water quality and water quantity, and requires a treatment process with strong impact resistance, the impact resistance is improved by adopting a mode of arranging fillers in a denitrification area, the fillers are arranged in the denitrification area, a submersible mixer is inconvenient to install, and the mixing and stirring are disadvantageous, so that the denitrification effect is influenced.
Disclosure of Invention
In view of the defects of the prior art, the utility model aims to provide an arrangement structure of a nitrifying liquid reflux hydraulic stirring mixing denitrification region, which can fully utilize a surplus water head of a nitrifying liquid reflux pump outlet to replace a stirrer, and has the advantages of energy conservation and improved denitrification effect.
To achieve the above object and other related objects, the present utility model provides the following technical solutions:
the arrangement structure of the nitrifying liquid reflux hydraulic stirring and mixing denitrification region comprises a denitrification region, wherein a sewage water inlet, a sewage water outlet and a nitrifying liquid reflux inlet are arranged on the denitrification region, water inflow of the denitrification region is connected with the sewage water inlet, water outflow of the denitrification region is connected with the sewage water outlet, a water distribution stirring pipe for water distribution and hydraulic stirring is arranged at the bottom in the denitrification region, and the water distribution stirring pipe is connected with the nitrifying liquid reflux inlet; the denitrification region is externally provided with a nitrifying liquid return pipeline, one end of the nitrifying liquid return pipeline is connected with a nitrifying liquid return inlet of the denitrification region, the other end of the nitrifying liquid return pipeline is connected with a nitrifying liquid return outlet at the tail end of the aerobic tank, and the nitrifying liquid return pipeline is provided with a nitrifying liquid return pump.
Optionally, a carbon source adding port is arranged on the denitrification region, and the carbon source adding port is connected with a dosing pipe of the carbon source adding device.
Optionally, the water distribution stirring pipe comprises a peripheral annular main pipe and a plurality of perforated pipes which are connected between two transverse main pipes of the annular main pipe and are uniformly distributed longitudinally.
Optionally, a plurality of water distribution holes are arranged on the perforated pipe at intervals along the length direction.
Optionally, the opening direction of the water distribution holes is inclined downwards, an included angle of 30-60 degrees is formed between the water distribution holes and the vertical direction, adjacent water distribution holes are positioned on different sides of the perforated pipe, and the water distribution holes are uniformly distributed in a staggered manner along the length direction of the perforated pipe.
Optionally, the aperture of the water distribution holes is 20-30 mm, and the distance between adjacent water distribution holes is 0.3-0.6 m.
Optionally, a nitrifying liquid reflux pump is arranged on the nitrifying liquid reflux pipeline, and a water inlet end and a water outlet end of the nitrifying liquid reflux pump are provided with control valves.
Optionally, suspended filler is arranged in the denitrification region and comprises fiber bundle filler, combined filler or elastic three-dimensional filler, the bottom of the suspended filler is 40 cm-70 cm away from the bottom of the denitrification region, and the top of the suspended filler is 30 cm-50 cm away from the highest liquid level.
As described above, the utility model has the beneficial effects that: according to the utility model, the nitrifying liquid in the aerobic tank is refluxed to the water distribution stirring pipe through the nitrifying liquid reflux pump and the nitrifying liquid reflux pipe, the nitrifying liquid refluxed by the water distribution stirring pipe is distributed and hydraulically mixed and stirred in the denitrification area, the surplus water head of the nitrifying liquid reflux pump can be fully utilized to replace a stirrer, and the efficient and uniform mixing and stirring of the whole section of the denitrification area are realized, so that the advantages of energy saving and denitrification effect improvement are realized.
Drawings
FIG. 1 is a schematic plan view of the present utility model;
FIG. 2 is view A-A of FIG. 1 (with the nitrified liquid return line and nitrified liquid return pump omitted);
FIG. 3 is a view B-B of the present FIG. 1;
FIG. 4 is a schematic structural view of a perforated pipe;
fig. 5 is a schematic diagram of the opening of the water distribution hole.
Description of the part reference numerals
The device comprises a 1-denitrification area, a 2-sewage water inlet, a 3-sewage water outlet, a 4-nitrifying liquid backflow inlet, a 5-carbon source feeding port, a 6-nitrifying liquid backflow pipeline, a 7-water distribution stirring pipe, an 8-water distribution main pipe, a 9-perforated pipe, 10-water distribution holes, an 11-nitrifying liquid backflow pump, a 12-control valve, a 13-carbon source feeding pipe and 14-filler.
Detailed Description
Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.
Examples
As shown in fig. 1 to 3, the arrangement structure of the denitrification region with the nitrifying liquid backflow hydraulic stirring and mixing comprises a denitrification region 1 (or a denitrification tank), wherein a sewage water inlet 2, a sewage water outlet 3 and a nitrifying liquid backflow inlet 4 are arranged on the denitrification region 1, and a carbon source adding port 5 can be arranged according to the carbon source adding requirement.
The bottom in the denitrification zone 1 is provided with a water distribution stirring pipe 7 for refluxing and stirring the nitrifying liquid, one end of a nitrifying liquid reflux inlet 4 is connected with the water distribution stirring pipe 7, the other end of the nitrifying liquid reflux inlet 4 is connected with a nitrifying liquid reflux outlet at the tail end of an aerobic tank (not shown) through a nitrifying liquid reflux pipeline 6, the water distribution stirring pipe 7 is used for stirring the refluxed nitrifying liquid water distribution and the denitrification zone, the water distribution stirring range basically covers the whole area of the denitrification zone 1, and the water distribution is uniform and fully mixed and stirred from the bottom of the tank to the whole section of the water surface.
The denitrification region 1 is provided with a nitrifying liquid return pipeline 6, the nitrifying liquid return pipeline 6 is provided with a nitrifying liquid return pump 11 and a control valve 12, the water inlet end of the nitrifying liquid return pump 11 is connected with a nitrifying liquid return outlet at the tail end of the aerobic tank through a pipeline, and the water outlet end of the nitrifying liquid return pump 11 is connected with a nitrifying liquid return inlet 4 through a pipeline. When the nitrifying liquid reflux pump 11 works, nitrifying liquid in the aerobic tank enters the nitrifying reflux pipe 6 through the nitrifying liquid reflux outlet, then enters the water distribution stirring pipe 7 through the nitrifying liquid reflux inlet 4, and enters the denitrification region 1 through the water distribution hole 10 by utilizing the surplus water head to carry out hydraulic mixing stirring.
In order to avoid that the nitrifying liquid reflux brings excessive oxygen to affect the anoxic environment required by denitrification and realize efficient and uniform mixing and stirring of the whole section, the flow of nitrifying liquid refluxed by the nitrifying liquid reflux pump is 300-400% of the designed water inflow average flow of the sewage water inlet 2.
The arrangement form is simultaneously suitable for the denitrification region 1 with or without the filler, the stirring effect is better than that of mechanical stirring, and when the mechanical stirring is inconvenient to install during the installation of the filler, the mixing problem of the nitrified liquid after the filler is installed in the anoxic region can be solved through the reflux hydraulic stirring of the nitrified liquid.
The carbon source adding port 5 is connected with an external carbon source medicine dissolving and adding device through a carbon source adding pipe 13, and adds carbon source to supplement carbon source required by denitrification when the carbon source in the denitrification area is insufficient.
Further, in this example, the sewage inlet 2 and the sewage outlet 3 are used for sewage inlet and outlet of the denitrification region treatment. The sewage water inlet 2 and the sewage water outlet 3 can be connected with the adjacent sewage treatment area through pipelines or a shared partition wall by adopting water holes.
The water distribution stirring pipe 7 comprises a peripheral annular main pipe 8 and a plurality of longitudinally and uniformly arranged perforated pipes 9, the annular main pipe 8 comprises two transverse main pipes and two longitudinal main pipes, the perforated pipes 9 are connected between the two transverse main pipes, as shown in fig. 4 and 5, a plurality of water distribution holes 10 for water distribution stirring are formed in the perforated pipes 9 along the length direction of the perforated pipes, the opening directions of the water distribution holes 10 are inclined downwards and form an included angle of 30-60 degrees with the vertical direction, in this example, the inclined downwards is 45 degrees, and two adjacent water distribution holes are located on different sides (namely one on the left side and the other on the right side) of the perforated pipes, namely, are staggered and uniformly arranged along the length direction of the perforated pipes 9, so that the uniformity and coverage range of water distribution stirring are improved. The aperture of the water distribution holes 9 is 20 mm-30 mm, and the distance between adjacent water distribution holes on the same perforated pipe 9 is 0.3 m-0.6 m; the water distribution stirring pipe 7 is arranged at the bottom of the denitrification zone 1;
in this case, the denitrification zone 1 may be provided therein with a packing 14 to improve impact load, extend biological chains and increase biomass. Wherein the filler 14 can be a fiber bundle filler, a combined filler or an elastic three-dimensional filler, and the like. The height of the bottom of the packing 14 is 40 cm-70 cm away from the bottom of the denitrification region 1, and the distance of the top of the packing 14 is 30 cm-50 cm away from the highest liquid level.
The sewage entering the denitrification zone 1 through the sewage inlet 2 is pretreated or anaerobically reacted sewage without toxic and harmful substances; the sewage outlet 3 is connected to the next stage of treatment unit; the denitrification region can be a pool with a reinforced concrete structure or integrated equipment.
In this example, control valves 12 are respectively disposed on the nitrifying liquid return pipeline 6 and the carbon source adding pipe 13, and a water inlet end and a water outlet end of the nitrifying reflux pump are provided with control valves 12 for adjusting nitrifying liquid return quantity and carbon source adding quantity.
The nitrifying liquid reflux pump 11 adopts a pump which is not easy to be blocked, such as a dry-type installation spiral centrifugal pump or a vertical pipeline centrifugal pump.
The treatment scale can be improved and parallel operation can be formed by arranging a plurality of denitrification areas in parallel.
According to the utility model, on one hand, the denitrification region 1 carries out nitrifying liquid reflux and denitrification region hydraulic mixing and stirring through the nitrifying liquid reflux pump 11, the nitrifying liquid reflux pipeline 6 and the water distribution stirring pipe 7, the residual water head of the nitrifying liquid reflux pump is fully utilized, and the denitrification biochemical treatment region is subjected to high-efficiency mixing and stirring of the whole section, so that a submersible stirrer can be saved, and the advantages of energy conservation and denitrification effect improvement are realized.
Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (9)
1. An arrangement structure of a nitrifying liquid reflux hydraulic stirring and mixing denitrification region is characterized in that: the denitrification device comprises a denitrification region, wherein a sewage water inlet, a sewage water outlet and a nitrifying liquid backflow inlet are arranged on the denitrification region, water inflow of the denitrification region is connected with the sewage water inlet, water outflow of the denitrification region is connected with the sewage water outlet, a water distribution stirring pipe for water distribution and hydraulic stirring is arranged at the bottom in the denitrification region, and the water distribution stirring pipe is connected with the nitrifying liquid backflow inlet; the denitrification region is externally provided with a nitrifying liquid return pipeline, one end of the nitrifying liquid return pipeline is connected with a nitrifying liquid return inlet of the denitrification region, the other end of the nitrifying liquid return pipeline is connected with a nitrifying liquid return outlet at the tail end of the aerobic tank, and the nitrifying liquid return pipeline is provided with a nitrifying liquid return pump.
2. The arrangement structure of the nitrifying liquid reflux hydraulic stirring mixed denitrification zone according to claim 1, which is characterized in that: the denitrification region is provided with a carbon source adding port, and the carbon source adding port is connected with a dosing pipe of the carbon source adding device.
3. The arrangement structure of the nitrifying liquid reflux hydraulic stirring mixed denitrification zone according to claim 1, which is characterized in that: the water distribution stirring pipe comprises a peripheral annular main pipe and a plurality of perforated pipes which are connected between two transverse main pipes of the annular main pipe and are longitudinally and uniformly arranged.
4. The arrangement structure of the nitrifying liquid reflux hydraulic stirring mixed denitrification zone according to claim 3, which is characterized in that: a plurality of water distribution holes are formed in the perforated pipe at intervals along the length direction.
5. The arrangement structure of the nitrifying liquid reflux hydraulic stirring mixed denitrification zone according to claim 4, which is characterized in that: the opening direction of the water distribution holes is inclined downwards and forms an included angle of 30-60 degrees with the vertical direction, the adjacent water distribution holes are positioned on different sides of the perforated pipe, and the water distribution holes are uniformly distributed in a staggered manner along the length direction of the perforated pipe.
6. The arrangement structure of the nitrifying liquid reflux hydraulic stirring mixed denitrification zone according to claim 4, which is characterized in that: the aperture of the water distribution holes is 20-30 mm, and the distance between adjacent water distribution holes is 0.3-0.6 m.
7. The arrangement structure of the nitrifying liquid reflux hydraulic stirring mixed denitrification zone according to any one of claims 1 to 6, which is characterized in that: the nitrifying liquid reflux pump is arranged on the nitrifying liquid reflux pipeline, and control valves are arranged at the water inlet end and the water outlet end of the nitrifying liquid reflux pump.
8. The arrangement structure of the nitrifying liquid reflux hydraulic stirring mixed denitrification zone according to any one of claims 1 to 6, which is characterized in that: the denitrification region is internally provided with suspended filler which comprises fiber bundle filler, combined filler or elastic three-dimensional filler, the bottom of the suspended filler is 40 cm-70 cm away from the bottom of the denitrification region, and the top of the suspended filler is 30 cm-50 cm away from the highest liquid level.
9. The arrangement structure of the nitrifying liquid reflux hydraulic stirring mixed denitrification zone according to claim 1, which is characterized in that: the flow rate of the nitrifying liquid returned by the nitrifying liquid return pump is 300% -400% of the designed average flow rate of the sewage water inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321297876.8U CN219752060U (en) | 2023-05-25 | 2023-05-25 | Arrangement structure of nitrifying liquid reflux hydraulic stirring and mixing denitrification region |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321297876.8U CN219752060U (en) | 2023-05-25 | 2023-05-25 | Arrangement structure of nitrifying liquid reflux hydraulic stirring and mixing denitrification region |
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| CN219752060U true CN219752060U (en) | 2023-09-26 |
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| CN202321297876.8U Active CN219752060U (en) | 2023-05-25 | 2023-05-25 | Arrangement structure of nitrifying liquid reflux hydraulic stirring and mixing denitrification region |
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| CN (1) | CN219752060U (en) |
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- 2023-05-25 CN CN202321297876.8U patent/CN219752060U/en active Active
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