CN111498982B - Three-section type high-efficiency BAF sewage treatment device - Google Patents
Three-section type high-efficiency BAF sewage treatment device Download PDFInfo
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- CN111498982B CN111498982B CN202010376097.1A CN202010376097A CN111498982B CN 111498982 B CN111498982 B CN 111498982B CN 202010376097 A CN202010376097 A CN 202010376097A CN 111498982 B CN111498982 B CN 111498982B
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- 239000010865 sewage Substances 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 207
- 239000002699 waste material Substances 0.000 claims abstract description 32
- 238000012856 packing Methods 0.000 claims description 81
- 239000002245 particle Substances 0.000 claims description 21
- 238000005273 aeration Methods 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 10
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000000945 filler Substances 0.000 description 39
- 239000007789 gas Substances 0.000 description 25
- 238000011001 backwashing Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 239000002351 wastewater Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000012765 fibrous filler Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 2
- 238000010170 biological method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- -1 and meanwhile Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000011197 physicochemical method Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- 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
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- 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
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- 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
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- Biodiversity & Conservation Biology (AREA)
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- 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 three-section type efficient BAF sewage treatment device which comprises a treatment tank body, wherein the treatment tank body is sequentially divided into a water distribution and air distribution area, a first filling area, a second filling area, a third filling area and a water outlet area from bottom to top, a filter plate is bridged between two opposite inner walls of the treatment tank body, the filter plate is formed by a plurality of obliquely arranged first plate bodies and a plurality of obliquely arranged second plate bodies which are reversely connected with the first plate bodies at intervals, a bubble homogenizer is further arranged between the first filling area and the second filling area, a first waste outlet is arranged on the treatment tank body above the bubble homogenizer, and a second water intake and a second waste outlet are arranged on the treatment tank body above the second filling area. The invention can realize uniform water and gas distribution, avoid effective volume reduction caused by dead zone formation in a filling area, improve treatment efficiency, realize long-time stable water and gas distribution and further ensure the quality and stability of effluent.
Description
Technical Field
The invention relates to a three-section type efficient BAF sewage treatment device, and belongs to the technical field of sewage treatment.
Background
In the field of sewage treatment, biological methods are widely used because of their good treatment effect and low running cost, compared with chemical methods and physicochemical methods. At present, the common biological methods mainly comprise an activated sludge method and a biological membrane method, the biological membrane method has various forms, including a BAF biological filter, a biological rotating disc, biological contact oxidation, a biological fluidized bed and the like, and the BAF biological filter has the advantages of simple operation, various biological phases, low residual sludge yield and the like, and is widely applied to urban and industrial wastewater treatment.
However, the current BAF biofilter process remains to be improved. The traditional BAF biological filter is difficult to bear high-load water inlet impact, meanwhile, the internal water and gas distribution non-uniformity is easily caused by a water and gas distribution mode of the long-handle filter head, the air-water mixture preferentially passes through the area with smaller resistance, the resistance is further increased in other areas due to the reduction of the flow velocity, and the dead area and the effective volume are increased due to malignant circulation. In addition, the micro bubbles generated by the aeration disc gradually gather into large bubbles in the process of passing through the filling area, so that the oxygen transfer effect is reduced, and the aeration quantity and the operation energy consumption are increased.
The effluent of the traditional BAF biological filter contains large and easily precipitated falling biological films and more fine suspended biological fragments, so that the effluent is turbid, and even a secondary sedimentation tank is needed to reduce the concentration of suspended matters in the final discharged water. In addition, the biomass is reduced after the traditional BAF biological filter is backwashed, the effluent quality needs to be recovered for a long time, and more inconvenience is brought to actual running operation and sewage treatment.
Disclosure of Invention
The invention aims to solve the technical problem of providing the three-section type efficient BAF sewage treatment device which can realize uniform water and gas distribution, avoid effective volume reduction caused by dead zones formed in a filling area, improve the treatment efficiency, effectively avoid filter plate blockage, realize long-time stable water and gas distribution and further ensure the quality and stability of effluent.
In order to solve the technical problems, the invention adopts the following technical scheme: the three-section type efficient BAF sewage treatment device comprises a treatment tank body, wherein the treatment tank body is sequentially divided into a water distribution and air distribution area, a first filler area, a second filler area and a water outlet area from bottom to top, filter plates, pebble layers stacked above the filter plates and particle fillers filled above the pebble layers are arranged in the first filler area and the second filler area, the particle fillers in the first filler area are high-load fillers, the particle fillers in the second filler area are low-load fillers, and a water distribution pipe and an air distribution pipe positioned above the water distribution pipe are arranged in the water distribution and air distribution area;
the filter plate is bridged between two opposite inner walls of the treatment tank body, the filter plate positioned in the first filling area is formed by connecting a plurality of first plate bodies which are obliquely arranged and a plurality of second plate bodies which are reversely inclined with the first plate bodies at intervals, so that an upward convex upper included angle area or a downward concave lower included angle area is formed between the adjacent first plate bodies and the second plate bodies, the upper parts of the first plate bodies and the second plate bodies are respectively provided with a filter through hole, water distribution holes are spaced on water distribution pipes positioned below the filter plate, and the water distribution holes are respectively arranged under the upper included angle areas;
the air bubble homogenizing device is characterized in that an air bubble homogenizing region surrounded by a cylindrical shell is further arranged between the first packing region and the second packing region, the upper end and the lower end of the air bubble homogenizing region are respectively communicated with the second packing region and the first packing region, a plurality of cutting pieces which are arranged at intervals along the circumferential direction are connected to the inner wall of the cylindrical shell, a water inlet pipe communicated with the air bubble homogenizing region is connected to the outer wall of the lower part of the cylindrical shell, the water inlet pipe is arranged along the tangential direction of the circumference of the shell, one end of the water inlet pipe opposite to the air bubble homogenizing region is communicated with the water outlet end of a circulating pump through a valve, and a water intake is arranged in the center of the upper part of the air bubble homogenizing region and is communicated with the water inlet end of the circulating pump through a water intake pipe.
The further improved scheme in the technical scheme is as follows:
1. in the above scheme, a third filler region is arranged between the second filler region and the water outlet region, and the third filler region is filled with fibrous filler.
2. In the above scheme, a three-phase separator is arranged between the second filling area and the third filling area, a gas collecting pipe of the three-phase separator is communicated with an exhaust pipe through an exhaust port on the treatment tank body, and an exhaust valve is arranged on the exhaust pipe.
3. In the scheme, the water distribution holes of the water distribution pipe are connected with the aeration disc.
4. In the above scheme, the water distribution pipe is communicated with a water inlet pump through a water inlet arranged at the lower end of the treatment tank body, a water inlet valve is connected to a water inlet pipe between the water inlet pump and the treatment tank body, the water distribution pipe is communicated with a fan through an air inlet arranged at the lower end of the treatment tank body, and an air inlet valve is connected to an air inlet pipe between the fan and the treatment tank body.
5. In the above scheme, be provided with a first waste gate on the treatment tank body of bubble homogenization district top, be provided with a second inlet scoop and a second waste gate on the treatment tank body of second packing district top, the second inlet scoop with the water inlet end intercommunication of circulating pump, the water outlet end of circulating pump communicates with the water inlet of treatment tank body lower extreme through a valve, be provided with first valve between inlet scoop and the circulating pump, be provided with the second valve between second inlet scoop and the circulating pump, be provided with third valve, fourth valve on the exhaust pipe that first waste gate, second waste gate are connected respectively.
6. In the above scheme, the water inlet valve, the air inlet valve, the first valve, the second valve, the third valve, the fourth valve and the exhaust valve are all electromagnetic valves electrically connected with the PLC.
7. In the above scheme, the filtering through holes are strip-shaped holes arranged at intervals, and the upper ends of the strip-shaped holes extend to the tail ends of the upper parts of the first plate body or the second plate body, so that the strip-shaped holes on the adjacent first plate body and second plate body are communicated.
8. In the scheme, the filtering through holes are round through holes which are uniformly and densely distributed.
9. In the above scheme, the water intake is in a horn shape with an upward opening. .
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the three-section type efficient BAF sewage treatment device is characterized in that the two filling areas arranged from bottom to top are respectively filled with high-load filling materials and low-load filling materials, so that the sewage is treated in a grading manner, the sewage treatment effect is enhanced, the blockage of the filling areas can be avoided, and the quality and the stability of effluent are improved; further, a third packing area is arranged between the second packing area and the water outlet area, the third packing area is filled with fibrous packing, and fine suspended matters in water can be further adsorbed and trapped by the arrangement of the third packing area, so that the quality of the water outlet is ensured.
2. The invention relates to a three-section type efficient BAF sewage treatment device, wherein a filter plate positioned in a first filling area is formed by connecting a plurality of first plate bodies which are obliquely arranged and a plurality of second plate bodies which are reversely inclined with the first plate bodies at intervals, so that an upward convex upper included angle area or a downward concave lower included angle area is formed between the adjacent first plate bodies and the second plate bodies, the upper parts of the first plate bodies and the second plate bodies are respectively provided with a filtering through hole, water distribution holes are spaced on a water distribution pipe positioned below the filter plate and are respectively arranged right below the upper included angle area, through the arrangement of a filter plate structure, the uniform water distribution and gas distribution can be realized, the effective volume reduction caused by dead areas formed in the filling area is avoided, the treatment efficiency is improved, the filter plate blockage can be effectively avoided, the long-time stable water distribution and gas distribution can be realized, and the quality and stability of water outlet can be further ensured; further, a bubble homogenizing area surrounded by a cylindrical shell is arranged between the first filling area and the second filling area, the upper end and the lower end of the bubble homogenizing area are respectively communicated with the second filling area and the first filling area, a plurality of cutting sheets which are arranged at intervals along the circumferential direction are connected to the inner wall of the cylindrical shell, a water inlet pipe communicated with the bubble homogenizing area is connected to the outer wall of the lower part of the cylindrical shell, the water inlet pipe is arranged along the tangential direction of the circumference of the shell, one end of the water inlet pipe opposite to the bubble homogenizing area is communicated with the water outlet end of a circulating pump through a valve, the center of the upper part of the bubble homogenizing area is provided with a water inlet, the water inlet is communicated with the water inlet end of the circulating pump through a water inlet pipe, and the collected bubbles passing through the first filling area are cut and homogenized in the bubble homogenizing area, so that the uniformity of water distribution and gas distribution inside the whole device is further ensured, the mass transfer rate is further improved, the aeration rate is reduced, and the running energy consumption is reduced.
3. The invention relates to a three-section type efficient BAF sewage treatment device, a first valve is arranged between a water intake and a circulating pump, a second valve is arranged between a second water intake and the circulating pump, a third valve and a fourth valve are arranged on waste discharge pipes respectively connected with a first waste discharge port and a second waste discharge port, a three-phase separator is arranged between a second packing area and a third packing area, a gas collecting pipe of the three-phase separator is communicated with an exhaust pipe through an exhaust port on a treatment tank body, an exhaust valve is arranged on the exhaust pipe, and through switching of a plurality of valves, independent backwashing of three packing areas in different time periods can be realized, so that the sewage treatment effect of each packing area can be ensured, the recovery time of the system can be effectively reduced, the water outlet stability can be ensured, the backwashing frequency can be reduced, and the balance stability of dominant bacteria in each packing area can be maintained.
Drawings
FIG. 1 is a schematic diagram of a three-stage efficient BAF sewage treatment device according to the present invention;
FIG. 2 is a schematic diagram of a bubble homogenizer in the sewage advanced treatment apparatus of the present invention;
fig. 3 is an enlarged view of a part of the structure of fig. 1.
In the above figures: 1. a treatment pool body; 2. the water and gas distribution area; 3. a first packing region; 4. a second packing region; 5. a third packing region; 6. a water outlet area; 7. a filter plate; 71. a first plate body; 72. a second plate body; 73. an upper included angle region; 74. a lower included angle region; 75. a filtering through hole; 8. a cobble layer; 9. a water distribution pipe; 91. a water inlet pump; 92. a water inlet valve; 93. a water flow meter; 94. a water inlet hole; 95. an aeration disc; 10. an air distribution pipe; 101. a blower; 102. an air inlet valve; 103. an intake air flow meter; 104. a check valve; 11. a three-phase separator; 111. an exhaust valve; 122. a first waste outlet; 123. a first valve; 124. a third valve; 131. a second water intake; 132. a second waste outlet; 133. a second valve; 134. a fourth valve; 14. a circulation pump; 15. a valve; 161. a housing; 162. a bubble homogenization zone; 163. a water inlet pipe; 164. cutting the sheet; 165. and a water intake.
Detailed Description
In the description of this patent, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element in question must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in this patent will be understood by those of ordinary skill in the art in a specific context.
Example 1: the three-section type efficient BAF sewage treatment device comprises a treatment tank body 1, wherein the treatment tank body 1 is sequentially divided into a water distribution and air distribution area 2, a first packing area 3, a second packing area 4, a third packing area 5 and a water outlet area 6 from bottom to top, filter plates 7, pebble layers 8 stacked above the filter plates 7 and particle packing filled above the pebble layers 8 are arranged in the first packing area 3 and the second packing area 4, the particle packing in the first packing area 3 is high-load packing with larger particle size, so that the uniformity of air and water in the packing area is ensured, meanwhile, the blocking of the packing area caused by thicker biomembrane under the high-load condition is avoided, the particle packing in the second packing area 4 is low-load packing with smaller particle size, the sewage can be further deeply treated, meanwhile, the biomembrane with smaller particle size can be effectively intercepted by packing, the fibrous packing is filled in the third packing area 5, the fibrous packing has strong adsorption capacity and adsorption capacity to fine suspended matters, and the water outlet quality can be effectively improved;
the water distribution and air distribution area 2 is internally provided with a water distribution pipe 9 and an air distribution pipe 10 positioned above the water distribution pipe 9, which are respectively used for injecting sewage to be treated and oxygen into the treatment tank, the water distribution pipe 9 is communicated with a water inlet pump 91 through a water inlet arranged at the lower end of the treatment tank body 1, a water inlet valve 92 is connected on a water inlet pipe between the water inlet pump 91 and the treatment tank body 1, the air distribution pipe 10 is communicated with a fan 101 through an air inlet arranged at the lower end of the treatment tank body 1, and an air inlet valve 102 is connected on an air inlet pipe between the fan 101 and the treatment tank body 1;
the filter plate 7 is bridged between two opposite inner walls of the treatment tank body 1, the filter plate 7 is formed by a plurality of first plate bodies 71 which are obliquely arranged and a plurality of second plate bodies 72 which are reversely inclined with the first plate bodies 71 in a spaced connection mode, so that an upward protruding upper included angle area 73 or a downward recessed lower included angle area 74 is formed between the adjacent first plate bodies 71 and the second plate bodies 72, the upper parts of the first plate bodies 71 and the second plate bodies 72 are respectively provided with a filtering through hole 75, a plurality of aeration discs 95 are connected to the water distribution pipe 9 below the filter plate 7 in a spaced connection mode, the aeration discs 95 are respectively arranged under the upper included angle area 73, the upper parts of the filter plates distribute water and air, the lower parts guide the air, the uniform air distribution in all areas at the bottom of the device is ensured, dead areas in the device are avoided due to the increase of local resistance, and the long-term stable and uniform water distribution and air distribution of the device can be realized;
a bubble homogenizer 16 is further arranged between the first packing region 3 and the second packing region 4, the bubble homogenizer 16 comprises a bubble homogenizing region 162 surrounded by a cylindrical shell 161, a water inlet pipe 163 communicated with the lower part of the bubble homogenizing region 162 and a plurality of cutting blades 164 positioned in the bubble homogenizing region 162, the upper end and the lower end of the bubble homogenizing region 162 are respectively communicated with the second packing region 4 and the first packing region 3, the cutting blades 164 are arranged at intervals along the circumferential direction of the cylindrical shell 161 and fixedly connected with the inner wall of the shell 161, the water inlet pipe 163 is arranged along the tangential direction of the circumference of the shell 161, one end of the water inlet pipe 163 is connected with the outer wall of the shell 161, the other end of the water inlet pipe 163 is communicated with the water outlet end of a circulating pump 14 through a valve, a water intake 165 is arranged in the center of the upper part of the bubble homogenizing zone 162, the water intake 165 is communicated with the water inlet end of the circulating pump 14 through a water intake pipeline, so that circulation is formed among the water intake, the circulating pump and the water inlet pipe, gas passes through an aeration disc to form a micro-bubble entering device, and is gathered into large bubbles after passing through a first filling zone in the vertical direction, and then enters a micro-bubble homogenizing zone in a micro-bubble homogenizer, the large bubbles are driven to pass through a cyclone cutting piece by the backflow of the circulating pump 27 and are formed into a cyclone through a tangential water inlet mode, the large bubbles are reformed into micro-bubbles under the cutting action of the cyclone cutting piece, the oxygen transmission rate is improved, the water quality is homogenized, and the uniform water distribution and the water distribution of a second filling zone are ensured;
a first waste outlet 122 is arranged on the treatment tank body 1 above the bubble homogenizer 16, a second water intake 131 and a second waste outlet 132 are arranged on the treatment tank body 1 above the second filling area 4, the second water intake 131 is communicated with the water inlet end of the circulating pump 14, the water outlet end of the circulating pump 14 is communicated with the water inlet at the lower end of the treatment tank body 1 through a valve 15, a first valve 123 is arranged between the water intake 165 and the circulating pump 14, a second valve 133 is arranged between the second water intake 131 and the circulating pump 14, and a third valve 124 and a fourth valve 134 are arranged on waste pipes respectively connected with the first waste outlet 122 and the second waste outlet 132;
a three-phase separator 11 is arranged between the second filling area 4 and the third filling area 5, a gas collecting pipe of the three-phase separator 11 is communicated with an exhaust pipe through an exhaust port on the treatment tank body 1, an exhaust valve 111 is arranged on the exhaust pipe, independent backwashing of each filling area can be realized by controlling the opening and closing of different valves and exhaust ports, independent backwashing of each filling area at different periods can effectively reduce the recovery time of the system, the stability of water outlet is ensured, and the occurrence of larger fluctuation of the water quality of the discharged water caused by the reduction of biomass of the system after backwashing is avoided; meanwhile, the independent backwashing of each filling area can greatly prolong the backwashing period of the second filling area, ensure longer sludge age in the second filling area and facilitate the removal of refractory organic matters.
The filtering holes 75 are bar-shaped holes arranged at intervals, and the upper ends of the bar-shaped holes extend to the upper tail ends of the first plate 71 or the second plate 72, so that the adjacent bar-shaped holes on the first plate 71 and the second plate 72 are communicated;
the height of the first packing region 3 is 1.0mm, the height of the second packing region 4 is 1.0mm, and the height of the third packing region 5 is 0.5mm; the high-load filler in the first filler zone 3 is volcanic filler with the particle size of 1 cm; the low-load filler in the second filler zone 4 is volcanic filler with the particle size of 5mm; the fibrous filler in the third filler zone 5 is soft fiber biological rope filler with the diameter of 40 mm;
a water inlet flow meter 93 is also connected to the water inlet pipe between the water inlet pump 91 and the treatment tank body 1; an air inlet flow meter 103 and a check valve 104 are connected to an air inlet pipe between the fan 101 and the treatment tank body 1; the water distribution pipe 9 is provided with a plurality of water inlets 94 at intervals.
Example 2: the three-section type efficient BAF sewage treatment device comprises a treatment tank body 1, wherein the treatment tank body 1 is sequentially divided into a water distribution and air distribution area 2, a first packing area 3, a second packing area 4, a third packing area 5 and a water outlet area 6 from bottom to top, filter plates 7, pebble layers 8 stacked above the filter plates 7 and particle packing filled above the pebble layers 8 are arranged in the first packing area 3 and the second packing area 4, the particle packing in the first packing area 3 is high-load packing, the particle packing in the second packing area 4 is low-load packing, and fiber packing is filled in the third packing area 5;
the water distribution and air distribution area 2 is internally provided with a water distribution pipe 9 and an air distribution pipe 10 positioned above the water distribution pipe 9, which are respectively used for injecting sewage to be treated and oxygen into the treatment tank, the water distribution pipe 9 is communicated with a water inlet pump 91 through a water inlet arranged at the lower end of the treatment tank body 1, a water inlet valve 92 is connected on a water inlet pipe between the water inlet pump 91 and the treatment tank body 1, the air distribution pipe 10 is communicated with a fan 101 through an air inlet arranged at the lower end of the treatment tank body 1, and an air inlet valve 102 is connected on an air inlet pipe between the fan 101 and the treatment tank body 1;
the filter plate 7 is bridged between two opposite inner walls of the treatment tank body 1, the filter plate 7 is formed by a plurality of first plate bodies 71 which are obliquely arranged and a plurality of second plate bodies 72 which are reversely inclined with the first plate bodies 71 in a spaced connection mode, an upward protruding upper included angle area 73 or a downward recessed lower included angle area 74 is formed between the adjacent first plate bodies 71 and the second plate bodies 72, the upper parts of the first plate bodies 71 and the second plate bodies 72 are respectively provided with a filter through hole 75, a plurality of aeration discs 95 are connected on the water distribution pipe 9 below the filter plate 7 in a spaced connection mode, and the aeration discs 95 are respectively arranged under the upper included angle areas 73;
a bubble homogenizer 16 is further arranged between the first filling area 3 and the second filling area 4, the bubble homogenizer 16 comprises a bubble homogenizing area 162 surrounded by a cylindrical shell 161, a water inlet pipe 163 communicated with the lower part of the bubble homogenizing area 162 and a plurality of cutting blades 164 positioned in the bubble homogenizing area 162, the upper end and the lower end of the bubble homogenizing area 162 are respectively communicated with the second filling area 4 and the first filling area 3, the cutting blades 164 are arranged at intervals along the circumferential direction of the cylindrical shell 161 and fixedly connected with the inner wall of the shell 161, the water inlet pipe 163 is arranged along the tangential direction of the circumference of the shell 161, one end of the water inlet pipe 163 is connected with the outer wall of the shell 161, the other end of the water inlet pipe is communicated with the water outlet end of a circulating pump 14 through a valve, the water inlet 165 is arranged in the center of the upper part of the bubble homogenizing area 162 and is communicated with the water inlet end of the circulating pump 14 through a water inlet pipe, so that circulation is formed among the water inlet, the circulating pump and the water inlet pipe;
a first waste outlet 122 is arranged on the treatment tank body 1 above the bubble homogenizer 16, a second water intake 131 and a second waste outlet 132 are arranged on the treatment tank body 1 above the second filling area 4, the second water intake 131 is communicated with the water inlet end of the circulating pump 14, the water outlet end of the circulating pump 14 is communicated with the water inlet at the lower end of the treatment tank body 1 through a valve 15, a first valve 123 is arranged between the water intake 165 and the circulating pump 14, a second valve 133 is arranged between the second water intake 131 and the circulating pump 14, and a third valve 124 and a fourth valve 134 are arranged on waste pipes respectively connected with the first waste outlet 122 and the second waste outlet 132;
a three-phase separator 11 is arranged between the second packing region 4 and the third packing region 5, a gas collecting tube of the three-phase separator 11 is communicated with a gas exhaust tube through a gas exhaust port on the treatment tank body 1, and a gas exhaust valve 111 is arranged on the gas exhaust tube.
The wastewater enters a water distribution pipe through a water inlet pump to uniformly distribute water, and meanwhile, air enters the water distribution pipe through an air pump and uniformly distributes air through an aeration disc; the air-water mixture enters the upper part of the filter plate and the cobble layer to uniformly distribute water and air after being guided by the lower part of the filter plate;
the wastewater passes through the first filler area, most pollutants are removed or converted under the action of a biological film on the surface of the filler, and microbubbles are gradually aggregated into large bubbles in the process of passing through the first filler area; the wastewater and the large bubbles pass through a bubble homogenizing area upwards, the large bubbles are cut into micro bubbles again under the action of a bubble homogenizer, and the water quality of the wastewater is homogenized; the homogenized gas-water mixture passes through the filter plate and the cobble layer upwards, is uniformly distributed with water and gas again, and then enters a second filling area, and in the second filling area, the residual pollutants in the wastewater are continuously degraded and converted, so that the wastewater is deeply treated.
The upper part of the second filling area is provided with a transition area for homogenizing water quality, the upper part of the transition area is provided with a three-phase separator, three-phase separation can be carried out on gas and liquid, gas is discharged through an exhaust port of a gas collecting pipe of the three-phase separator, solids are intercepted by the three-phase separator, treated wastewater enters a third filling area through the three-phase separator, fine suspended matters in the wastewater are adsorbed by soft fiber biological rope filling materials in the process of passing through the third filling area, and the wastewater is further deeply treated; the wastewater is discharged through the water outlet region and the water outlet after passing through the third filling region.
Further, a backwashing system capable of realizing independent backwashing of each filling area is arranged, and the backwashing system is opened at regular time according to the effluent quality change and the running period of the device, so that the stable running of the long-term device is ensured:
the independent backwash process for the first packing region is as follows: the water and air distribution unit is normally opened, a valve between the circulating pump and the water inlet pipe of the bubble homogenizer and a valve 133 are closed, a valve 124, a valve 123 and a valve 15 are opened, the circulating pump 14 is opened, and backwash waste liquid is discharged through the first waste discharge port 122;
the independent backwash process for the second packing region is as follows: the water and air distribution unit is normally opened, the valve 15 and the valve 123 are closed, the valve 133, the valve 134 between the circulating pump and the water inlet pipe of the bubble homogenizer are opened, the circulating pump 14 is opened, and the backwash waste liquid is discharged through the second waste discharge port 132;
the independent backwash process for the third packing region is as follows: the water inlet pump 91 and the circulating pump 14 are closed, the air pump 101 is normally opened, the electromagnetic valve 111 is closed, gas enters the third filling area through the three-phase separator, fine suspended matters adsorbed by the soft fiber biological rope filling material fall off under the gas scouring action and are deposited to a transition area above the second filling area through the three-phase separator, the valve 134 is opened, and backwash waste liquid containing the fine suspended matters is discharged through the second waste discharge port 132.
The filtering holes 75 are uniformly and densely distributed round holes; the diameter of the filtering through holes 75 is smaller than the particle diameter of the particle filler in the first filler zone 3;
the edge of the cutting blade 164 is arc-shaped; the intake 165 is flared with an upward opening; the water inlet valve 92, the air inlet valve 102, the valve 15, the first valve 123, the second valve 133, the third valve 124, the fourth valve 134 and the air outlet valve 111 are all electromagnetic valves electrically connected with a PLC controller;
the height of the first filler zone 3 is 2.0m, the height of the second filler zone 4 is 1.5m, and the height of the third filler zone 5 is 0.8m; the high-load filler in the first filler zone 3 is volcanic filler with the particle size of 3 cm; the low-load filler in the second filler zone 4 is volcanic filler with the particle size of 8 mm; the fibrous filler in the third filler zone 5 is a soft fibrous biological rope filler with the diameter of 80 mm.
When the three-section type efficient BAF sewage treatment device is adopted, the sewage is treated in a grading manner, so that the sewage treatment effect is enhanced, the blockage of a filler area can be avoided, the quality and stability of water outlet are improved, fine suspended matters in the water can be further adsorbed and trapped, and the quality of the water outlet is ensured.
In addition, through the arrangement of the filter plate structure, uniform water and gas distribution can be realized, the effective volume reduction caused by dead zones formed in a filling area is avoided, the treatment efficiency is improved, the filter plate blockage can be effectively avoided, long-time stable water and gas distribution is realized, and the quality and stability of the discharged water are further ensured;
further, cutting and homogenizing the air bubbles aggregated after passing through the first filling area in the air bubble homogenizing area, so that the uniformity of water distribution and air distribution in the whole device is further ensured, the mass transfer rate is ensured, the treatment efficiency is further improved, and meanwhile, the aeration rate and the operation energy consumption are reduced;
in addition, the three-way sewage treatment device can realize independent backwashing of three filling areas in different time periods through switching of the valves, can ensure the sewage treatment effect of each filling area, can effectively reduce the recovery time of the system, ensure stable water outlet, can reduce backwashing frequency, and can maintain the balance and stability of dominant bacteria in each filling area.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (10)
1. The utility model provides a high-efficient BAF sewage treatment plant of syllogic which characterized in that: the water distribution and gas distribution device comprises a treatment tank body (1), wherein the treatment tank body (1) is sequentially divided into a water distribution and gas distribution area (2), a first packing area (3), a second packing area (4) and a water outlet area (6) from bottom to top, filter plates (7), pebble layers (8) stacked above the filter plates (7) and particle packing filled above the pebble layers (8) are arranged in the first packing area (3) respectively, the particle packing in the first packing area (3) is high-load packing, the particle packing in the second packing area (4) is low-load packing, and a water distribution pipe (9) and a gas distribution pipe (10) arranged above the water distribution pipe (9) are arranged in the water distribution and gas distribution area (2);
the filter plate (7) is bridged between two opposite inner walls of the treatment tank body (1), the filter plate (7) positioned in the first filling area (3) is formed by a plurality of first plate bodies (71) which are obliquely arranged and a plurality of second plate bodies (72) which are reversely inclined with the first plate bodies (71) in a spacing manner, so that an upward-protruding upper included angle area (73) or a downward-recessed lower included angle area (74) is formed between the adjacent first plate bodies (71) and the second plate bodies (72), the upper parts of the first plate bodies (71) and the second plate bodies (72) are respectively provided with a filter through hole (75), and water distribution holes are formed in the water distribution pipes (9) positioned below the filter plate (7) in a spacing manner and are respectively arranged under the upper included angle area (73);
the air bubble homogenizing device is characterized in that an air bubble homogenizing area (162) surrounded by a cylindrical shell (161) is further arranged between the first packing area (3) and the second packing area (4), the upper end and the lower end of the air bubble homogenizing area (162) are communicated with the second packing area (4) and the first packing area (3) respectively, a plurality of cutting pieces (164) which are arranged at intervals along the circumferential direction are connected to the inner wall of the cylindrical shell (161), a water inlet pipe (163) communicated with the air bubble homogenizing area (162) is connected to the outer wall of the lower portion of the cylindrical shell (161), the water inlet pipe (163) is arranged along the tangential direction of the circumference of the shell (161), one end of the water inlet pipe (163) opposite to the air bubble homogenizing area (162) is communicated with the water outlet end of a circulating pump (14) through a valve, and a water intake (165) is arranged in the center of the upper portion of the air bubble homogenizing area (162), and the water intake (165) is communicated with the water inlet end of the circulating pump (14) through a water intake pipe.
2. The three-stage efficient BAF sewage treatment apparatus according to claim 1, wherein: a third packing region (5) is arranged between the second packing region (4) and the water outlet region (6), and the third packing region (5) is filled with fibrous packing.
3. The three-stage efficient BAF sewage treatment apparatus according to claim 2, wherein: a three-phase separator (11) is arranged between the second filling area (4) and the third filling area (5), a gas collecting tube of the three-phase separator (11) is communicated with an exhaust pipe through an exhaust port on the treatment tank body (1), and an exhaust valve (111) is arranged on the exhaust pipe.
4. The three-stage efficient BAF sewage treatment apparatus according to claim 1 or 2, wherein: the water distribution holes of the water distribution pipes (9) are connected with aeration discs (95).
5. The three-stage efficient BAF sewage treatment apparatus according to claim 1 or 2, wherein: the water distribution pipe (9) is communicated with a water inlet pump (91) through a water inlet arranged at the lower end of the treatment tank body (1), a water inlet valve (92) is connected to a water inlet pipe between the water inlet pump (91) and the treatment tank body (1), the air distribution pipe (10) is communicated with a fan (101) through an air inlet arranged at the lower end of the treatment tank body (1), and an air inlet valve (102) is connected to an air inlet pipe between the fan (101) and the treatment tank body (1).
6. The three-stage efficient BAF sewage treatment apparatus according to claim 5, wherein: the air bubble homogenizing device is characterized in that a first waste outlet (122) is formed in the treatment tank body (1) above the air bubble homogenizing zone (162), a second water intake (131) and a second waste outlet (132) are formed in the treatment tank body (1) above the second packing zone (4), the second water intake (131) is communicated with the water inlet end of the circulating pump (14), the water outlet end of the circulating pump (14) is communicated with the water inlet at the lower end of the treatment tank body (1) through a valve (15), a first valve (123) is arranged between the water intake (165) and the circulating pump (14), a second valve (133) is arranged between the second water intake (131) and the circulating pump (14), and a third valve (124) and a fourth valve (134) are arranged on waste pipes respectively connected with the first waste outlet (122) and the second waste outlet (132).
7. The three-stage efficient BAF sewage treatment apparatus according to claim 6, wherein: the water inlet valve (92), the air inlet valve (102), the valve (15), the first valve (123), the second valve (133), the third valve (124) and the fourth valve (134) are all electromagnetic valves electrically connected with the PLC.
8. The three-stage efficient BAF sewage treatment apparatus according to claim 1 or 2, wherein: the filtering through holes (75) are strip-shaped holes arranged at intervals, and the upper ends of the strip-shaped holes extend to the tail ends of the upper parts of the first plate body (71) or the second plate body (72), so that the strip-shaped holes on the adjacent first plate body (71) and second plate body (72) are communicated.
9. The three-stage efficient BAF sewage treatment apparatus according to claim 1 or 2, wherein: the filtering through holes (75) are round through holes which are uniformly and densely distributed.
10. The three-stage efficient BAF sewage treatment apparatus according to claim 1 or 2, wherein: the water intake (165) is in a horn shape with an upward opening.
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| CN205773630U (en) * | 2016-05-18 | 2016-12-07 | 长春市佳辰环保设备有限公司 | Detest, aerobic integratedization BAF |
| CN107055771A (en) * | 2017-06-02 | 2017-08-18 | 上海同济环境工程科技有限公司 | A kind of water and air distributing system and its backwash technique |
| CN108751623A (en) * | 2018-08-13 | 2018-11-06 | 武汉森泰环保股份有限公司 | A kind of multifunction double-layer filter tank |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101143277A (en) * | 2007-08-08 | 2008-03-19 | 翁长春 | Filtering board |
| CN101732902A (en) * | 2010-02-08 | 2010-06-16 | 张杰波 | Strip combined filter plate and filter chamber using same |
| CN202962013U (en) * | 2012-09-04 | 2013-06-05 | 杨志江 | Air water backflushing multi-chamber filtration device |
| CN103936141A (en) * | 2014-04-15 | 2014-07-23 | 中持（北京）水务运营有限公司 | Biological aerated filter |
| CN104609537A (en) * | 2015-01-29 | 2015-05-13 | 江苏菲力环保工程有限公司 | Efficient aerating device for water treatment |
| CN205773630U (en) * | 2016-05-18 | 2016-12-07 | 长春市佳辰环保设备有限公司 | Detest, aerobic integratedization BAF |
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| CN111498982A (en) | 2020-08-07 |
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