CN115340174B - Filter material loss prevention device of biological filter - Google Patents
Filter material loss prevention device of biological filter Download PDFInfo
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- CN115340174B CN115340174B CN202210928948.8A CN202210928948A CN115340174B CN 115340174 B CN115340174 B CN 115340174B CN 202210928948 A CN202210928948 A CN 202210928948A CN 115340174 B CN115340174 B CN 115340174B
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- interception
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- 239000000463 material Substances 0.000 title claims abstract description 108
- 230000002265 prevention Effects 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 84
- 239000002351 wastewater Substances 0.000 claims abstract description 77
- 238000011144 upstream manufacturing Methods 0.000 claims description 13
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 238000011010 flushing procedure Methods 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 11
- 239000010865 sewage Substances 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- 238000001914 filtration Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000005273 aeration Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000001546 nitrifying effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- 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
- C02F3/10—Packings; Fillings; Grids
-
- 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
-
- 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)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a filter material loss prevention device of a biological filter, which solves the problem of filter material loss in the back flushing process of the biological filter, and the technical scheme is as follows: the loss prevention device includes: the wastewater drainage canal is arranged on the side surface of the filter tank and is close to the water outlet weir of the filter tank, and wastewater enters the wastewater drainage canal after being discharged from the filter tank; the water outlet interception net is arranged at the top of a water outlet weir of the filter tank, and the top of the water outlet interception net is inclined towards the direction of the wastewater drainage channel; the filter material interception grating frame is arranged at the bottom of the wastewater drainage canal, the wastewater drainage canal is provided with a drain pipe, the drain pipe is positioned at the bottom of the filter material interception grating frame, and the drain pipe is provided with a valve. Through the function of the filter material interception device, the purpose of effectively preventing the filter material from losing during back flushing is achieved.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a filter material loss prevention device of a biological filter.
Background
The aeration biological filter (Biological Aerated Filter, BAF for short) is a common structure unit of a deep treatment unit of a sewage treatment plant, and can solve the problems of nitrification, denitrification and the like after secondary treatment of the sewage treatment plant. The aeration biological filter is generally divided into two-stage biological filters, namely a nitrifying biological filter (CN tank) and a denitrifying biological filter (DN tank). The BFA system comprises a bottom space, a water and gas distribution system, a filter plate, a supporting layer, a filter material layer and a water outlet system from bottom to top. The filter materials in BAF are main microorganism carriers, generally particle fillers with higher specific surface area, and common filter materials are as follows: zeolite, haydite, volcanic rock, activated carbon, etc. The sewage generally flows through the filtering material layer from top to bottom, aeration is arranged at the bottom of the nitrifying biological filter, and pollutants in the sewage fully contact with microorganisms on the surface of the filtering material in the process of water flowing through the filtering material layer, so that the pollutants are biochemically degraded, and the aim of purifying the sewage is fulfilled. In addition, gaps among the filter materials are smaller, so that part of suspended pollutants can be intercepted. When the biological filter is operated for a period of time, the pressure of the filter is increased due to the pollution blockage of pollutants and biological membranes, and back flushing is needed to remove the pollutants and the growing biological membranes on the surface of the filter material. The back flushing process of the BAF is mainly divided into three stages of air flushing, air-water combined flushing and water flushing, and the time and the times of the air flushing and the air-water flushing can be increased according to actual conditions to achieve the enhanced back flushing effect.
In the running process of the biological filter, the time interval of back flushing is generally 12-48h according to the running condition, the filter material layer can be expanded by air washing in the back flushing process, pollutants and redundant biological films on the surface of the filter material layer can be flushed and dropped by the air-water combined back flushing by utilizing the friction of air and water flow, and the flushed pollutants can be taken out of the system by water washing.
However, in the back flushing process, because the flow rates of the back flushing water pump and the blower are large, part of filter materials can be driven by air flow and water flow to be discharged along with the flushed waste water, so that the filter materials are lost after the biological filter is operated for a period of time, the height of the filter material layer is reduced, and the like. The effective biomass of the biological filter is reduced, the discharged filter material can be deposited at the bottom of the wastewater drainage tank, the safe operation of the wastewater drainage pump is influenced, and if the wastewater with the filter material returns to the production system of the sewage treatment plant, the filter material can also influence various equipment of the sewage treatment plant, so that the filter material loss of the biological filter is of great significance.
Disclosure of Invention
The invention aims to provide a filter material loss prevention device capable of effectively blocking filter materials in the back flushing process of a biological filter.
In order to achieve the above object, the present invention provides a device for preventing filter materials in a biological filter from being lost, the device comprising:
the wastewater drainage canal is arranged on the side surface of the filter tank and is close to the water outlet weir of the filter tank, and wastewater enters the wastewater drainage canal after being discharged from the filter tank;
the water outlet interception net is arranged at the top of a water outlet weir of the filter tank, and the top of the water outlet interception net is inclined towards the direction of the wastewater drainage channel;
the filter material interception grating frame is arranged at the bottom of the wastewater drainage canal, the wastewater drainage canal is provided with a drain pipe, the drain pipe is positioned at the bottom of the filter material interception grating frame, and the drain pipe is provided with a valve.
Preferably, the filter material interception grid frame is a triangular grid frame, and the filter material interception grid frame is arranged at one side of the bottom of the wastewater drainage channel, which is far away from the filter tank.
Preferably, the filter material interception grid frame comprises a bottom bracket and a back surface, a water facing surface and two side surfaces which are connected with the bottom bracket, the bottom bracket is rectangular, the back surface is vertically arranged and attached to the side wall of the wastewater drainage channel, which is far away from the water outlet weir, the water facing surface is arranged towards the water outlet weir in an inclined manner, and the side surfaces are triangular.
Preferably, the back surface, the upstream surface and the side surface all comprise a plurality of bars arranged in parallel, the bars are cylindrical, the upstream surface further comprises inclined support bars for connecting the bars, and the side surface further comprises side support bars for connecting the bars;
the gaps between adjacent grid bars are 2.1-5.0mm, and the diameters of the grid bars are 4-7mm.
Preferably, the length a of the bottom bracket is 1.0-1.5m, the width b is 1.4-1.8m, and the height h1 is 8-15cm.
Preferably, a connecting frame is arranged at the top of the filter material interception grating frame, and the cross section of the connecting frame is triangular; the height h3 of the connecting frame is 10-30cm.
Preferably, the water outlet interception net comprises a plurality of stainless steel cylindrical strips which are arranged in parallel, the gap between every two adjacent cylindrical strips is 2.1-5.0mm, and the diameter of each cylindrical strip is 4-7mm;
the stainless steel cylinder strip is the broken line type, including along the first cylinder strip of vertical direction setting and towards the second cylinder strip of waste water drainage canal direction slope, the inclination of second cylinder strip for the vertical direction is 30-60 degrees.
Preferably, a bottom space is arranged below the filter tank, a water inlet pipe is arranged in the bottom space, and the top of the bottom space is communicated with the filter tank through a filter head filter rod assembly.
Preferably, the bottom of the filter tank is provided with a supporting layer, and the filter material is arranged above the supporting layer.
Preferably, a water outlet channel is arranged on one side, far away from the filter tank, of the wastewater drainage channel, and the top of the wastewater drainage channel is communicated with the water outlet channel.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the water outlet interception net is added at the water outlet of the filter tank, so that the filter material with larger particle size in the filter tank can be blocked in the back flushing process, the filter material is prevented from flowing out of the filter tank in a large quantity, and meanwhile, the filter material can be prevented from entering the water outlet channel to influence the subsequent treatment of wastewater.
The waste water drainage canal collects waste water generated in the back flushing process and small particle filter materials mixed in the waste water drainage canal, the filter material interception grid frame is arranged at the top of a drain pipe of the waste water drainage canal, fine particle filter materials carried out in the back flushing process can be filtered for the second time, and after the waste water drainage canal is emptied, the filter materials can be deposited at the bottom of the waste water drainage canal, and through manual observation, when the filter materials are accumulated to a certain degree, the filter materials are cleaned and returned to the filter tank, so that the filter materials can be recycled.
Meanwhile, the water outlet interception net is obliquely arranged, so that the filter material can return to the filter tank along the inclined plane of the water outlet interception net while the filter material is blocked, and the filter material is prevented from accumulating at the water outlet interception net to influence the filtering effect.
Further, the filter material interception grating frame adopts the inclined plane as the upstream surface, and can utilize water flow to carry out self-cleaning, so as to prevent filter materials and algae from accumulating on the surface of the filter material interception grating frame.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular descriptions of exemplary embodiments of the invention as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the invention.
Fig. 1 shows a schematic structure of the present invention.
Fig. 2 shows a schematic view of the structure of the filter material interception grating frame of the present invention.
In the figure: 1. a water inlet pipe; 2. a filter head and filter rod assembly; 3. a bottom space; 4. a support layer; 5. a filter material; 6. a water outlet interception net; 7. a waste water drainage channel; 8. a water outlet channel; 9. a filter material interception grating frame; 10. a drain pipe; 11. a valve; 12. a connecting frame; 13. a bottom bracket; 14. a grid bar; 15. an inclined support bar; 16. and a lateral support bar.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the preferred embodiments of the present invention are described below, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The embodiment provides a biological filter material prevents loss device, prevent loss device includes:
the wastewater drainage canal 7 is arranged on the side surface of the filter tank, is close to the water outlet weir of the filter tank, and enters the wastewater drainage canal 7 after being discharged from the filter tank;
a water outlet interception net 6, wherein the water outlet interception net 6 is arranged at the top of a water outlet weir of the filter tank, and the top of the water outlet interception net 6 is inclined towards the direction of the wastewater drainage channel 7;
the filter material interception grating frame 9, the filter material interception grating frame 9 set up in waste water drainage canal 7 bottom, waste water drainage canal 7 is provided with drain pipe 10, drain pipe 10 is located filter material interception grating frame 9 bottom, drain pipe 10 is provided with valve 11.
Specifically, the wastewater discharged in the back flushing process is discharged from an effluent weir at the top of the filter tank to a wastewater drainage channel 7, the particle size of a filter material in the biological filter tank is 3-6mm, a water outlet interception net 6 can separate the filter material driven by back flushing water flow, the inclination angle of the water outlet interception net 6 is 30-60 degrees, the water outlet interception net 6 is obliquely arranged, the filter material can return to the filter tank along the inclined surface of the water outlet interception net 6 while blocking the filter material, accumulation is prevented, a valve 11 of a wastewater drain pipe 10 is closed during normal back flushing operation, filter tank water flows into the wastewater drainage channel 7 from the effluent weir, after the wastewater drainage channel 7 is full of water, flows into the water outlet channel 8 from a weir wall between the wastewater drainage channel 7 and the water outlet channel 8 for treatment, after back flushing is finished, a valve 11 is opened, accumulated water in the wastewater drainage channel 7 is discharged, accumulated water is discharged into the wastewater drainage tank, small particles are deposited at the bottom of the wastewater drainage channel 7 by an interception grid frame 9, and can be manually filled back into the filter material after being deposited to a certain degree.
Preferably, the filter material interception grid frame 9 is a triangular grid frame, and the filter material interception grid frame 9 is arranged at one side of the bottom of the wastewater drainage channel 7 away from the filter tank.
Specifically, waste water drainage canal 7 cross-section is the rectangle, and filter material interception grid frame 9 cross-section is right triangle-shaped, and in this embodiment, filter material interception grid frame 9 frame is the angle steel, angle steel thickness 5mm.
Preferably, the filter material interception grid frame 9 comprises a bottom bracket 13 and a back surface, an upstream surface and two side surfaces which are connected with the bottom bracket 13, the bottom bracket 13 is rectangular, the back surface is vertically arranged and attached to the side wall of the wastewater drainage channel 7, which is far away from the water outlet weir, the upstream surface is arranged towards the water outlet weir in an inclined manner, and the side surfaces are triangular. The length a of the bottom bracket is 1.0-1.5m, the width b is 1.4-1.8m, and the height h1 is 8-15cm.
Specifically, the back is attached to the side wall of the wastewater drainage channel 7, so that support can be provided for the filter material interception grid frame 9, the upstream surface of the filter material interception grid frame 9 is obliquely arranged, the maximum upstream surface can be obtained, and the inclined surface and the side edge and the bottom edge of the wastewater drainage channel 7 form a triangular structure, so that the structure is more firm, and the filter material interception grid frame 9 and the wall of the wastewater drainage channel 7 are also more firm after being fixed; the bottom support 13 is a rectangular angle iron frame, and the bottom edge of the angle iron frame is attached to the bottom surface of the wastewater drainage channel 7 to prevent the filter material from passing through the bottom of the bottom support 13.
The triangular interception grating wraps the inlet of the drain pipe 10 inside the grating, and all water entering the waste water drainage channel 7 can enter the drain pipe 10 after flowing through the grating, so that filter materials in the water discharged from the waste water drainage channel 7 are intercepted in the waste water drainage channel 7, and the subsequent uniform cleaning and backfilling are convenient.
Preferably, the back surface, the upstream surface and the side surface each comprise a plurality of bars 14 arranged in parallel, the bars 14 are cylindrical, the upstream surface further comprises inclined support bars 15 for connecting the bars 14, and the side surface further comprises side support bars 16 for connecting the bars 14; the gaps between adjacent grid bars are 2.1-5.0mm, and the diameters of the grid bars are 4-7mm.
Specifically, the diameter of the cylindrical bars is 6mm, the gaps of the cylindrical bars are 2mm gaps, the gaps among the grid bars are smaller than the lowest diameter of the filter material of the biological filter tank by 3mm, and the filter material carried in the backwash wastewater can be completely intercepted in the wastewater drainage channel.
Preferably, a connecting frame 12 is arranged at the top of the filter material interception grating frame 9, and the cross section of the connecting frame 12 is triangular; the height h3 of the connecting frame 12 is 10-30cm.
Specifically, the connecting frame 12 can be connected with the side wall of the wastewater drainage channel 7 through bolts to fix the filter material interception grid frame 9, so that the filter material interception grid frame 9 is prevented from moving due to the impact of water flow.
Preferably, the water outlet interception net 6 comprises a plurality of stainless steel cylindrical strips which are arranged in parallel, the gap between every two adjacent cylindrical strips is 2.1-5.0mm, and the diameter of each cylindrical strip is 4-7mm; the cylindrical strip has smooth appearance and is beneficial to the passage of water flow.
The stainless steel cylinder strip is the broken line type, including along the first cylinder strip of vertical direction setting and towards the second cylinder strip of waste water drainage canal 7 direction slope, the inclination of second cylinder strip for the vertical direction is 30-60 degrees.
Specifically, the diameter of the grid 14 is 6mm, the gap between the adjacent grid 14 in this embodiment is 2.0mm, and the shape of the cylindrical grid 14 is smoother, which is beneficial to the water flow. The cylindrical shape is more uniform than other shapes and does not cause variation in the spacing of the bars 14 due to rotation. The cylindrical shape is more stable than other shapes, the resistance is smaller when water flows through, and the cylindrical shape is less prone to being impacted and deformed by the water flow. The proper diameter is 6mm, so that the strength of the grid bar is ensured not to be deformed due to water flow impact, and the grid bars 14 with larger diameters are not selected so as to reduce the occupied area of the grid bars 14 as much as possible, increase the total area of the gaps of the grid bars 14 and increase the water passing area, thereby being beneficial to the passing of water flow.
Preferably, a bottom space 3 is arranged below the filter, a water inlet pipe 1 is arranged at the bottom of the bottom space 3, and the top of the bottom space 3 is communicated with the filter through a filter head filter rod assembly 2. The bottom of the filter tank is provided with a supporting layer 4, and a filter material 5 is arranged above the supporting layer 4. The waste water drainage canal 7 is far away from one side of the filter tank and is provided with a water outlet canal 8, and the top of the waste water drainage canal 7 is communicated with the water outlet canal 8.
Specifically, the supporting layer 4 is a cobble layer, backwash water enters the bottom space 3 from the water inlet pipe 1, backwash is carried out on the filter head filter rod assembly 2 and the supporting layer 4, suspended matters which are flushed by the backwash are discharged from the top of the filter tank, and then enter the water outlet channel 8 through the wastewater drainage channel 7 for subsequent treatment.
The device for reducing filter material loss has good operation effect, certain filter materials can be intercepted in the wastewater drainage channel 7, and the filter materials intercepted in the wastewater drainage channel 7 of a single biological filter are about 0.3-0.5m in the use time of 6 months 3 The accumulated filter materials in the wastewater drainage pool for collecting wastewater are not obviously increased. The filter materials in the wastewater drainage channel 7 are often flushed by backwash water, so that suspended matters and other substances are less, the filter materials are relatively clean and relatively convenient to clean, and the filter materials can be directly collected and then poured into the corresponding biological filter for recycling.
Meanwhile, the device can be applied to all the filters of the whole filtering system, each filter is provided with the wastewater drainage channel 7, and when the filter material is backfilled, the filter material in the corresponding wastewater drainage channel 7 is directly backfilled into the corresponding filter, so that the condition of uneven backfilling of the filter material of the biological filter can be prevented.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.
Claims (9)
1. The utility model provides a biological filter material prevents loss device which characterized in that, prevent loss device includes:
the wastewater drainage channel (7) is arranged on the side surface of the filter tank, is close to the water outlet weir of the filter tank, and enters the wastewater drainage channel (7) after being discharged from the filter tank;
a water outlet interception net (6), wherein the water outlet interception net (6) is arranged at the top of a water outlet weir of the filter tank, and the top of the water outlet interception net (6) is inclined towards the direction of the wastewater drainage channel (7);
the filter material interception grating frame (9), the filter material interception grating frame (9) is arranged at the bottom of the wastewater drainage canal (7), the wastewater drainage canal (7) is provided with a drain pipe (10), the drain pipe (10) is positioned at the bottom of the filter material interception grating frame (9), and the drain pipe (10) is provided with a valve (11);
the filter material interception grid frame (9) comprises a bottom bracket (13) and a back surface, an upstream surface and two side surfaces which are connected with the bottom bracket (13), the bottom bracket (13) is rectangular, the back surface is vertically arranged and attached to the side wall of the wastewater drainage channel (7) at one side far away from the water outlet weir, the upstream surface is obliquely arranged towards the water outlet weir, and the side surfaces are triangular;
the back surface, the upstream surface and the side surface all comprise a plurality of grid bars (14) which are arranged in parallel, the grid bars (14) are cylindrical, gaps between adjacent grid bars are 2.1-5.0mm, and the diameter of each grid bar is 4-7mm;
the filter material interception grid frame (9) wraps the inlet of the drain pipe (10) in the grid.
2. The filter material loss prevention device of the biological filter according to claim 1, wherein the filter material interception grid frame (9) is a triangular grid frame, and the filter material interception grid frame (9) is arranged at one side of the bottom of the wastewater drainage channel (7) far away from the filter.
3. The device for preventing loss of filter material in a biological filter according to claim 1, wherein the upstream surface further comprises a diagonal support bar (15) for connecting a plurality of the bars (14), and the side surface further comprises a side support bar (16) for connecting a plurality of the bars (14).
4. The device for preventing filter materials in a biological filter according to claim 1, wherein the length a of the bottom bracket is 1.0-1.5m, the width b is 1.4-1.8m, and the height h1 is 8-15cm.
5. The filter material loss prevention device of the biological filter according to claim 2, wherein a connecting frame (12) is arranged at the top of the filter material interception grid frame (9), and the cross section of the connecting frame (12) is triangular; the height h3 of the connecting frame (12) is 10-30cm.
6. The device for preventing loss of filter materials in a biological filter according to claim 1, wherein the water outlet interception net (6) comprises a plurality of stainless steel cylindrical strips which are arranged in parallel, the gap between every two adjacent cylindrical strips is 2.1-5.0mm, and the diameter of each cylindrical strip is 4-7mm;
the stainless steel cylinder strip is a broken line type, and comprises a first cylinder strip arranged along the vertical direction and a second cylinder strip inclined towards the direction of the wastewater drainage channel (7), wherein the inclination angle of the second cylinder strip relative to the vertical direction is 30-60 degrees.
7. The biological filter material loss prevention device according to claim 1, wherein a bottom space (3) is arranged below the filter, the bottom space (3) is provided with a water inlet pipe (1), and the top of the bottom space (3) is communicated with the filter through a filter head filter rod assembly (2).
8. The filter material loss prevention device for the biological filter according to claim 7, wherein a supporting layer (4) is arranged at the bottom of the filter, and the filter material (5) is arranged above the supporting layer (4).
9. The filter material loss prevention device of the biological filter according to claim 1, wherein a water outlet channel (8) is arranged on one side of the wastewater drainage channel (7) away from the filter, and the top of the wastewater drainage channel (7) is communicated with the water outlet channel (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210928948.8A CN115340174B (en) | 2022-08-03 | 2022-08-03 | Filter material loss prevention device of biological filter |
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| CN202210928948.8A CN115340174B (en) | 2022-08-03 | 2022-08-03 | Filter material loss prevention device of biological filter |
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| CN115340174A CN115340174A (en) | 2022-11-15 |
| CN115340174B true CN115340174B (en) | 2024-04-12 |
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| CN117959798A (en) * | 2024-04-01 | 2024-05-03 | 山东泰亚环保科技有限公司 | Active carbon interception device for active carbon adsorption filtration system |
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| CN214763534U (en) * | 2020-12-29 | 2021-11-19 | 江苏江南水务股份有限公司 | Backwashing drainage filter material intercepting device for filter tank of water plant |
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