CN110117062B - Novel biological filter backwash gas distribution pipeline system and biological aerated filter - Google Patents
Novel biological filter backwash gas distribution pipeline system and biological aerated filter Download PDFInfo
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- CN110117062B CN110117062B CN201910420397.2A CN201910420397A CN110117062B CN 110117062 B CN110117062 B CN 110117062B CN 201910420397 A CN201910420397 A CN 201910420397A CN 110117062 B CN110117062 B CN 110117062B
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- backwashing
- backwash
- main pipe
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- 238000009826 distribution Methods 0.000 title claims abstract description 112
- 238000011001 backwashing Methods 0.000 claims abstract description 71
- 238000005273 aeration Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000012856 packing Methods 0.000 claims description 3
- 239000010865 sewage Substances 0.000 description 10
- 238000001914 filtration Methods 0.000 description 9
- 239000000945 filler Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
- B01D24/4631—Counter-current flushing, e.g. by air
- B01D24/4636—Counter-current flushing, e.g. by air with backwash shoes; with nozzles
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/06—Aerobic processes using submerged filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a novel biological filter backwashing gas distribution pipeline system and an aeration biological filter, wherein the backwashing gas distribution pipeline system comprises a backwashing gas distribution main pipe and a plurality of T-shaped backwashing gas distribution branch pipes communicated with the backwashing gas distribution main pipe, one end of the backwashing gas distribution main pipe is an air inlet, and the other end of the backwashing gas distribution main pipe is closed; t shape backwash gas distribution branch pipe is followed backwash gas distribution is responsible for axial interval evenly distributed, T shape backwash gas distribution branch pipe includes violently pipe and standpipe, the standpipe perpendicular to backwash gas distribution is responsible for, violently manage through the standpipe with backwash gas distribution is responsible for the intercommunication, violently manage the axial with backwash gas distribution is responsible for axial one-tenth contained angle, violently manage the end and seal, violently manage and be equipped with a plurality of gas pockets along its length direction. The system carries out two-stage flow division on the air supply, and can effectively lighten the impact force of backwash air on the pipeline, thereby prolonging the service life of the pipeline and effectively ensuring the air supply uniformity, stability and safety of the backwash air distribution pipeline system.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a novel biological filter backwashing gas distribution pipeline system and a biological aerated filter with the same.
Background
The Biological aerated filter (Biological AERATED FILTER, BAF) is a novel Biological treatment technology with rapid development, has the advantages of small occupied area, high effluent quality, investment saving, flexible and convenient operation, easy management, strong impact load resistance and the like, integrates Biological sewage treatment and deep filtration, and fully reflects the trend of the modern water treatment technology towards compound and integrated development.
After the aeration biological filter is operated for a period of time, a large amount of suspended matters in sewage can be adhered to the surface of the filter material due to the strong interception effect of the aeration biological filter, meanwhile, the growth of microorganisms is inhibited due to the thickening of the growth of the biological film, and the two reasons can lead to the reduction of the treatment efficiency of the filter and the deterioration of the water quality of effluent. Therefore, the filter tank needs to be backwashed, and the main effect of backwashed is to recover the activity of the biological membrane and discharge the suspended matters and the aged and shed biological membrane out of the tank along with backwashed water.
The existing backwashing gas distribution device is difficult to realize uniform gas distribution, so that backwashing effect is low, and water treatment efficiency is affected.
Disclosure of Invention
In order to solve the defects in the prior art, on one hand, a biofilter backwashing gas distribution pipeline system with uniform gas supply is provided, and the biofilter backwashing gas distribution pipeline system comprises a backwashing gas distribution main pipe and a plurality of T-shaped backwashing gas distribution branch pipes which are arranged on the backwashing gas distribution main pipe and are uniformly distributed along the axial direction of the backwashing gas distribution main pipe at intervals;
One end of the backwashing gas distribution main pipe is a gas inlet, and the other end of the backwashing gas distribution main pipe is closed;
The T-shaped backwashing gas distribution branch pipe comprises a transverse pipe and a vertical pipe, the vertical pipe is perpendicular to the backwashing gas distribution main pipe, the transverse pipe is communicated with the backwashing gas distribution main pipe through the vertical pipe, an included angle is formed between the axial direction of the transverse pipe and the axial direction of the backwashing gas distribution main pipe, the tail end of the transverse pipe is sealed, and a plurality of air holes are formed in the transverse pipe along the length direction of the transverse pipe.
Preferably, the air holes are uniformly formed in two sides below the transverse tube. Further, the air holes are positioned at 45 degrees on two sides below the transverse tube, more preferably are uniformly staggered on two sides below the transverse tube, in the specific embodiment, the size of the openings isThe holes are spaced 250mm apart.
Preferably, the axial direction of the transverse pipe is perpendicular to the axial direction of the backwashing gas distribution main pipe.
Preferably, the transverse pipe and the vertical pipe are connected by a tee joint.
Preferably, one end of the vertical pipe extends into the backwashing gas distribution main pipe, and the extending depth is not more than 3/4 of the pipe diameter of the backwashing gas distribution main pipe.
Preferably, the T-shaped backwashing gas distribution branch pipes are distributed at intervals of 1-1.2 m.
On the other hand, the aeration biological filter provided with the backwashing gas distribution pipeline system is also provided.
Preferably, the biological aerated filter comprises a tank body, wherein a clear water area, a packing layer, a supporting layer, a filter plate and a water distribution area are sequentially arranged in the tank body from top to bottom, a backwash gas distribution pipeline system is arranged in the water distribution area, the backwash gas distribution main pipe is horizontally arranged at the bottom of the tank body, and T-shaped backwash gas distribution branch pipes are uniformly arranged on the backwash gas distribution main pipe, so that transverse pipes are uniformly distributed below the filter plate.
Preferably, a plurality of back flushing filter heads are arranged on the filter plate.
Preferably, the interval distance between the upper end of the transverse pipe and the filter plate is 0.05-0.1m.
Preferably, the backwashing gas distribution main pipe is fixed at the bottom of the tank body through a bracket.
Preferably, a pipe clamp for fixing the transverse pipe is arranged below the filter plate.
The beneficial effects of one embodiment of the invention are as follows:
The branch pipes with the T-shaped structures are used for carrying out two-stage flow distribution on the air supply, so that the impact force of backwash air on the pipeline can be effectively reduced, the service life of the pipeline is prolonged, and the stability and the safety of a backwash air distribution pipeline system are effectively ensured.
Branch pipes are uniformly distributed and perforated, the tail ends of the main pipes and the tail ends of the branch pipes are sealed, the uniform and stable air supply is ensured, and the problems of nonuniform air supply and insufficient air supply of backwashing gas in the prior art are effectively solved. The result shows that the biological aerated filter using the backwashing gas distribution pipeline system has obviously improved backwashing strength, operation period and filtering and dirt-intercepting capacity of a filtering layer, and the water consumption for backwashing is obviously reduced.
Drawings
FIG. 1 is a schematic diagram of a backwash gas distribution pipeline system according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a section B-B of FIG. 1;
FIG. 4 is a schematic view of the cross tube aperture orientation of an embodiment of the present invention;
fig. 5 is a schematic structural view of a biological aerated filter according to an embodiment of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
The biofilter backwashing gas distribution pipeline system shown in the figures 1-3 comprises a backwashing gas distribution main pipe 1 which is horizontally arranged and a plurality of T-shaped backwashing gas distribution branch pipes 2 which are arranged on the backwashing gas distribution main pipe 1 and uniformly distributed along the axial direction of the backwashing gas distribution main pipe 1 at intervals.
One end of the backwashing gas distribution main pipe 1 is a gas inlet 11, the other end of the backwashing gas distribution main pipe is sealed by a plug, gas leakage is prevented, impact force of backwashing gas to a pipeline can be effectively lightened, gas supply from the main pipe to the branch pipe is uniform and stable, and service life of the pipeline is prolonged.
T shape backwash gas distribution branch pipe 2 includes violently pipe 22 and standpipe 21, standpipe 21 perpendicular to backwash gas distribution is responsible for 1, standpipe 21 lower extreme with backwash gas distribution is responsible for 1 intercommunication, and the upper end is provided with tee bend 23, violently pipe 22 pass through tee bend 23 with standpipe 21 intercommunication, be convenient for pipeline installation and change. The vertical pipe and the horizontal pipe can carry out secondary flow distribution on the air supply, so that the impact force of backwash air on the pipeline is effectively reduced, the service life of the pipeline is prolonged, and the stability and the safety of a backwash air distribution pipeline system are effectively ensured. In practical application, the lower end of the standpipe 21 can be extended to a certain distance in the main pipe, preferably 3/4 or less of the pipe diameter of the backwash gas distribution main pipe 1, which is favorable for slowing down the impact of air flow on the pipeline, in this embodiment, one end of the standpipe 21 extends into the backwash gas distribution main pipe 1, and the extending depth is 3/4 of the pipe diameter of the backwash gas distribution main pipe 1.
The axial direction of the transverse pipe 22 forms an included angle with the axial direction of the backwashing gas distribution main pipe 1, preferably 90 degrees, namely is perpendicular to the backwashing gas distribution main pipe 1. The end of the transverse tube 22 is sealed by a plug, and a plurality of air holes 221 are formed in the transverse tube 22 along the length direction of the transverse tube 22 to improve the air supply uniformity, preferably, holes are formed in two sides of the lower part of the transverse tube 22 at 45 degrees, as shown in fig. 4, more preferably, the air holes 221 are uniformly arranged in a staggered manner in two sides of the lower part of the transverse tube 22. The uniform distribution and the open pore of the branch pipe can effectively solve the problems of uneven air supply, insufficient air supply and the like of backwash air. In the embodiment, the interval of the T-shaped backwashing gas distribution branch pipes 2 is 1-1.2 m, and the quantity of the branch pipes and the gas supply uniformity are both considered.
The backwashing gas distribution pipeline system is applied to the biological aerated filter, as shown in fig. 5, 1 and 2. The aeration biological filter comprises a tank body 3 in a raw column shape, wherein a clear water area 4, a packing layer 5, a supporting layer 6, a filter plate 7 and a water distribution area 8 are sequentially arranged in the tank body 3 from top to bottom, and a backwashing gas distribution pipeline system is arranged in the water distribution area 8.
Specifically, the backwash gas distribution main pipe 1 is located at the bottom of the tank body 3, is horizontally arranged along the radial direction of the section of the tank body 3, and the gas inlet 11 of the backwash gas distribution main pipe extends out of the tank body 3 and is used for being communicated with the air pipe. The T-shaped backwashing gas distribution branch pipes 2 are uniformly arranged on the backwashing gas distribution main pipe 1, so that the transverse pipes 22 are uniformly distributed below the filter plates 7 and are perpendicular to the backwashing gas distribution main pipe 1.
The distance between the upper end of the transverse tube 22 and the filter plate 7 is preferably 0.05-0.1m, and a tube clamp can be arranged below the filter plate 7 for fixing the transverse tube 22. The filter plate 7 is provided with a plurality of back flush filter heads 71, and the transverse pipes 22 and the back flush filter heads 71 are staggered. The backwash gas distribution main pipe 1 is fixed at the bottom of the tank body 3 through the bracket 9, so that the stability and the safety of the backwash gas distribution pipeline system can be effectively ensured.
In the traditional aeration biological filter structure, a backwashing gas distribution system and a filler are not layered in a specific limit, and the backwashing gas distribution system is positioned at the bottom of the filler and can cause blockage of a backwashing gas distribution pipeline due to the difference and fluctuation influence of water quality of inflow, so that the pipeline is required to be frequently maintained or replaced due to corrosion, strong water and gas impact force and the like. The filter tank pipeline is quite difficult to repair and replace, the pipeline is required to be repaired or replaced after the filler is cleaned, and the operation of the filter tank pipeline has certain difficulty and potential safety hazard. The embodiment carries out reasonable layering setting on the filter tank, and backwash gas distribution pipeline system is arranged at the bottom and is separated from the filler, so that the service life of the pipeline can be prolonged, the link of cleaning the filler when maintaining the pipeline is removed, and the maintenance rate of the pipeline is reduced.
An example of the biological aerated filter is as follows:
The diameter of the filter tank is 6m, the backwashing gas distribution main pipe 1 is fixed at the bottom of the tank body 3 through a bracket 9, the pipe diameter is 400mm, and the backwashing gas distribution main pipe is horizontally arranged along the radial direction of the tank body 3. The 5T-shaped backwash gas distribution branch pipes 2 are uniformly arranged on the main pipe, so that all the transverse pipes 22 are vertical to the backwash gas distribution main pipe 1 and horizontally and uniformly distributed at the bottom of the tank body 3, the design height of the transverse pipes 22 is about 0.05-0.1m away from the filter plate 7, angle steel can be welded below the filter plate 7, and the transverse pipes 22 are fixed on the angle steel below the filter plate 7 through pipe clamps. The T-shaped backwashing gas distribution branch pipes 2 have a pipe diameter of 100mm and are distributed at intervals of 1.2m, wherein the height of the vertical pipes 21 is 900mm, the lower ends of the vertical pipes extend into 3/4 of the pipe diameter of the main pipe, the upper ends of the vertical pipes are provided with three-way pipes 23, the transverse pipes 22 are symmetrically arranged at two sides of the vertical pipes 21 through the three-way pipes 23, 45-degree crossed openings are formed at two sides below the transverse pipes 22, and the opening sizes are as follows The hole spacing is 250mm, and the two ends of the transverse tube 22 are closed by plugs.
The utilization rate of backwash gas in the scheme reaches more than 90%, the flow velocity through the air holes 221 reaches 30-40m/s, the backwash of the filter material is complete, the agglomeration phenomenon is reduced, the filtration and interception capability of the filter material can continuously reach more than 90%, and compared with the traditional biological filter (the backwash gas distribution pipeline system is not separated from the filler and the backwash gas inlet pipe is used for direct gas supply), the maintenance rate of the pipeline is reduced by 60-80%.
The biological aerated filter is used for treating sewage with different concentrations, and has the following implementation effects:
Compared with the traditional biological filter, the optimized backwash strength of the biological filter of the backwash air distribution system is improved by 30-40%, the backwash water requirement is reduced by 1 time, the running period is improved by 80%, and the filtration and sewage interception capability of a filter layer is improved by 80% for low-concentration domestic sewage (COD is less than 150 mg/L).
Compared with the traditional biological filter, the optimized biological filter for backwashing gas distribution system has the advantages that the backwashing strength of the biological filter for medium-concentration domestic sewage (COD is less than or equal to 150mg/L and less than 500 mg/L) is improved by 30-40%, the water consumption for backwashing is reduced by 80%, the running period is improved by 50%, and the filtering and dirt-intercepting capacity of a filtering layer is improved by 75%.
Compared with the traditional biological filter, the optimized backwash strength of the biological filter of the backwash gas distribution system is improved by 50%, the water required by backwash is reduced by 80%, the running period is improved by 50%, and the filtration and sewage interception capability of a filter layer is improved by 80% for high-concentration sewage (COD is less than or equal to 500mg/L and less than 1000 mg/L).
Therefore, the aeration biological filter can be well suitable for sewage treatment with different concentrations, the backwashing strength, the running period and the filtering and soil interception capacity of the filter layer are obviously improved compared with those of the traditional biological filter, the water required by backwashing is obviously reduced, and the aeration biological filter has strong practicability.
The above examples are illustrative of the present invention, but the present invention is not limited to the specific details in the above embodiments, and various equivalent or simple modifications made by those skilled in the art within the technical spirit of the present invention should fall within the scope of the present invention.
Claims (7)
1. An application of a biological filter backwashing gas distribution pipeline system in a biological aerated filter is characterized in that,
The backwashing gas distribution pipeline system comprises a backwashing gas distribution main pipe and a plurality of T-shaped backwashing gas distribution branch pipes which are arranged on the backwashing gas distribution main pipe and are uniformly distributed along the axial direction of the backwashing gas distribution main pipe at intervals;
One end of the backwashing gas distribution main pipe is a gas inlet, and the other end of the backwashing gas distribution main pipe is closed;
the T-shaped backwashing gas distribution branch pipe comprises a transverse pipe and a vertical pipe, the vertical pipe is perpendicular to the backwashing gas distribution main pipe, the transverse pipe is communicated with the backwashing gas distribution main pipe through the vertical pipe, an included angle is formed between the axial direction of the transverse pipe and the axial direction of the backwashing gas distribution main pipe, the tail end of the transverse pipe is sealed, a plurality of air holes are formed in the transverse pipe along the length direction of the transverse pipe, and the air holes are positioned at 45-degree positions on two sides below the transverse pipe;
the aeration biological filter comprises a tank body, wherein a clear water area, a packing layer, a supporting layer, a filter plate and a water distribution area are sequentially arranged in the tank body from top to bottom, a backwash gas distribution pipeline system is arranged in the water distribution area, the backwash gas distribution main pipe is horizontally arranged at the bottom of the tank body, and T-shaped backwash gas distribution branch pipes are vertically and uniformly arranged on the backwash gas distribution main pipe, so that transverse pipes are uniformly distributed below the filter plate.
2. The use according to claim 1, wherein the air holes are uniformly formed on both sides below the transverse tube.
3. The use of claim 1, wherein the cross tube axis is perpendicular to the backwash gas distribution main axis.
4. The use of claim 1, wherein one end of the standpipe extends into the backwash gas distribution main pipe to a depth of no more than 3/4 of the pipe diameter of the backwash gas distribution main pipe.
5. The use of any one of claims 1-4, wherein a three-way connection is used between the cross pipe and the standpipe.
6. The use according to any one of claims 1-4, wherein the T-shaped backwash gas distribution branches are distributed at intervals of 1-1.2 m.
7. The use according to any one of claims 1-4, wherein the backwash gas distribution main pipe is fixed to the bottom of the tank body by a bracket.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910420397.2A CN110117062B (en) | 2019-05-20 | 2019-05-20 | Novel biological filter backwash gas distribution pipeline system and biological aerated filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910420397.2A CN110117062B (en) | 2019-05-20 | 2019-05-20 | Novel biological filter backwash gas distribution pipeline system and biological aerated filter |
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| CN110117062A CN110117062A (en) | 2019-08-13 |
| CN110117062B true CN110117062B (en) | 2024-05-14 |
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| CN112777728A (en) * | 2020-12-18 | 2021-05-11 | 武汉艾科滤膜技术有限公司 | Membrane biological aerated filter |
| CN116511642B (en) * | 2023-07-04 | 2024-02-20 | 西科沃克瑞泰克热处理设备制造(天津)有限公司 | Adjustable nitrogen conveying pipe of brazing furnace |
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| CN110117062A (en) | 2019-08-13 |
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