CN1689985A - Aeration biological filter tank and arraying method of aeration filtering head - Google Patents
Aeration biological filter tank and arraying method of aeration filtering head Download PDFInfo
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- CN1689985A CN1689985A CNA2004100339407A CN200410033940A CN1689985A CN 1689985 A CN1689985 A CN 1689985A CN A2004100339407 A CNA2004100339407 A CN A2004100339407A CN 200410033940 A CN200410033940 A CN 200410033940A CN 1689985 A CN1689985 A CN 1689985A
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- 238000001914 filtration Methods 0.000 title claims abstract description 108
- 238000005273 aeration Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 53
- 238000011010 flushing procedure Methods 0.000 claims description 19
- 239000000706 filtrate Substances 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims 1
- 239000010865 sewage Substances 0.000 abstract description 13
- 238000013461 design Methods 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 238000006731 degradation reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000009827 uniform distribution Methods 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 230000000813 microbial effect Effects 0.000 description 4
- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- 238000011001 backwashing Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 239000011343 solid material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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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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- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The present invention relates to sewage treating apparatus, and is especially the arrangement method of aerating biofiltering pond and aerating head with different kinds of filtering head. The filtering heads in the aerating biofiltering pond includes base flow filtering head and high flow filtering head, and the base flow filtering head has aeration inlet hole in the pipe wall in relatively high position compared with that of the high flow filtering head.
Description
Technical field
The present invention relates to waste disposal plant, particularly have the BAF of dissimilar filtering heads and the aligning method of aeration filter head.
Background of invention
BAF (BAF) worldwide is widely used in the processing to municipal wastewater or trade effluent.It combines high treatment efficiency and many other advantages, and for example effluent quality height and reliability are high.As shown in Figure 1, BAF mainly comprise filtrate, support filtrate the pond body, be equiped be used to supply water and the filtering head of air feed and support the filter layer of filtrate and be positioned at filter layer below for introducing sewage, technology aeration, backwashing water and necessary all devices of back flushing air and structure.
In BAF, remove pollutent and mainly be based on two kinds of mechanism, promptly by filtering and biological degradation.When filtering, the suspended solid material in the sewage is removed and is entered from pending water in the hole in the filtrate; During by biological degradation, will remove dissolved substances from water, and the suspended solid material that will before filter out from water degrades, wherein the dissolved substances kind can be the organic molecule as sugar or lipid acid etc., or as the inorganics of ammonia etc.
Biological degradation is to have only the microbial film of hundreds of micron thickness to realize by one deck that the filtrate outside surface is born in natural birth, and microbial film is the uniform texture that one deck is made up of different bacterium, protozoon and suspended substance, and has very high activity.
The biological degradation of carrying out in BAF is based on the oxidation of the pollutent that contains in the sewage and carries out.In degradation process, pollutent is as energy source and electronics is provided, and produces carbonic acid gas by electronics and the oxygen reaction that pollutent discharged.
For biodegrade under aeration (also claiming band oxygen) environment, must provide oxygen to microbial film.This can be achieved by technology aeration and pending sewage are introduced filtering head simultaneously.Sewage and technology aeration one are same as to be introduced below the filter layer.
Except the technology aeration is provided, needs that also air is introduced BAF and be used for back flushing.Back flushing need regularly be carried out, and carries out once in for example per 24 hours, removes in order to will stay the suspended solid material of resistance in filtrate, and makes microbial film be returned to original thickness.If there is not regular back flushing, then the biological filter finally can accumulate the too high pressure-losses (pressure loss) because of the stifled match in the space between filtering material particle.Introduce can coexist with the backwashing water one of the cleaning below of filter layer of back flushing air, but also can introduce separately under the situation of not adding water.
Correct the providing of technology aeration and back flushing air, it is the important factor that influences the BAF overall performance, therefore, the design with BAF of optimization design must be satisfied following requirement: promptly, (1) makes the mixing of sewage and technology aeration reach optimization; (2) (surface-area is equal to or greater than 120m on surface, whole filter tank
2), uniform distribution sewage and technology aeration; (3) when injecting sewage or technology aeration independently, also can satisfy two conditions of above-mentioned (1) and (2); (4) at whole filter tank surface uniform distribution back flushing air and backwashing water.The basic technological design that reaches above-mentioned target comprises: water is gentle to flow upward (upward flow filtration) abreast, and uses the filter layer, to support filtrate and the filtering head that task is optimized usefulness is set.The benefit of upward flow filtration is a lot of, as splendid mass transfer, prevent to stop up (in direction mobile situation) etc. by air.And use the filter layer that filtering head is set, also be consistent engineering common method.
Except these basic technology parameters, concrete design and their arrangements on the filter layer with optimizing of filtering head are also very important.
Fig. 2 is the existing synoptic diagram that is used for the filtering head of BAF.Wherein, filtering head 1 is installed on the filter layer 2.Each independently filtering head 1 all form by shower nozzle 3 that has relief outlet and tail pipe 4; Tail pipe 4 is 5 openings in the lower end, so that water is entered.Technology aeration and back flushing air enter hole 6 by an emptying gas and enter tail pipe 4.Air is before entering tail pipe, and accumulation forms one deck air cushion layer 7 earlier below the filter layer.Thereby below filter layer 2, there is an air/water interface 8.
Usually, the thickness of air cushion layer 7 (position of air/water interface) is the function of size and the complexity of these parameters of arranging of the airport of the diameter of flow velocity, tail pipe of flow velocity, the air of water and length and tail pipe.Generally speaking, the thickness of air cushion layer 7 depends on the hydraulics in the filtering head, and when air velocity rises, because the pressure-losses (pressureloss) by air admission hole 6, the thickness of air cushion layer 7 will increase, when water flow velocity rises, because the pressure-losses of water of increase has caused the pressure-losses (pressure of air cushion layer deducts the pressure in the tail pipe of hole eminence) by the higher airflow in air admission hole 6 tail pipe 4 in, therefore, the thickness of air cushion layer 7 will reduce.The thickness of air cushion layer 7 will determine again that conversely which air admission hole 6 is effectively active, can accept air.
Fig. 5 shown existing when using one type filtering head in BAF, under different air/water ratios, and the relation between air/water interface and the technology solarization air cap position.As shown in Figure 5, when the air/water ratio increased, the air/water interface was down passed, and the thickness of air cushion layer increases.Therefore, under the situation of low air/water ratio, this air/water interface is in close proximity to technology aeration hand-hole.And when under this low air/water ratio, carrying out actually operating, because civil engineering can not be constructed to level fully usually, the following situation of air/water interface appears being positioned in the technology aeration hand-hole that is difficult to avoid regional area occurring, thereby causes whole technology aeration to produce irregular equal distribution.
And, because invalid filtering head is not the surface that is evenly distributed in whole biological filter, but produce in the horizontal direction departing from random with respect to the filter layer, to form sheet " patch " under many circumstances, this patch can spread all over several square metres the zone on BAF surface, on these zones, can't accept oxygen supply, therefore do not participate in biodegradation process.This can produce serious influence to the treatment effect in filter tank usually.
Therefore, just require when the parts of design filtering head tail pipe, fully take into account the hydraulics in each stage (normal filtration and back flushing) in the BAF operation, optimize its design as far as possible, make under the operating environment of different BAF, for example inferior in the different condition of the flow velocity of empty G﹠W and/or air/water ratio, water and air all can obtain the uniform distribution of technology aeration by filtering head.
Summary of the invention
The present inventor by a large amount of work and deep research after, a kind of BAF that satisfies above-mentioned design requirements has been proposed, by using two kinds of dissimilar filtering heads therein, can be implemented under the operating environment of different BAF, empty G﹠W can be distributed in filtrate uniformly by filtering head.In two kinds of dissimilar filtering heads that in BAF of the present invention, use, all the higher horizontal position at its tail pipe has the technology aeration hand-hole that enters for the technology aeration, and has the back flushing gas inlet for the back flushing air admission at the lower position place of its tail pipe.In two types filtering head, the level attitude of technology aeration hand-hole is different with size, and the length of back flushing air hand-hole, tail pipe is all identical with diameter and shower nozzle.The present inventor finds this filtering head of two types according to certain rules or when being installed on the filter layer with the ratio that changes, just can under different hydraulics, realize alternating expression air feed (SPAS, StaggeredProcess Air Supply), make the technology aeration after by filtering head, be implemented in uniform distribution in the filtrate.Under the air/water flow rate condition of different ratios, the thickness of air cushion layer is with different, causing being in the above technology aeration hand-hole of air/water interface can provide the technology aeration, and the technology aeration hand-hole that is in below the air/water interface can not provide the technology aeration.Because the locational difference of the technology aeration hand-hole on the dissimilar filtering head among the present invention makes that under different hydraulics the technology aeration will be provided equably by the filtering head of different quantities, produces aforesaid alternating expression air feed effect.
All use the situation of the filtering head of same type with respect to the everywhere in BAF, in same BAF, use dissimilar filtering heads can be implemented under the different hydraulics by of the present invention, carry out the alternating expression air feed, thereby can on whole filtering layer surface, obtain handiness and reliability that even air distributes.
Description of drawings
Fig. 1 is the BAF synoptic diagram.
Fig. 2 is the existing synoptic diagram that is used for the filtering head of BAF.
Fig. 3 is the synoptic diagram of two types filtering head using in the BAF of the present invention.
Fig. 4 is for showing base flow filtering head of the present invention and the high synoptic diagram that flows through a kind of arrangement of filter.
Fig. 5 has shown existing when using one type filtering head in BAF, under different air/water ratios, and the relation between air/water interface and the technology solarization air cap position.
Fig. 6 has shown of the present invention when using two types filtering head in same BAF, under different air/water ratios, and the relation between air/water interface and the technology solarization air cap position.
Fig. 7 has shown the technology aeration supply ratio of dissimilar filtering heads among the present invention.
Fig. 8 has shown the different aligning methods of filtering heads dissimilar among the present invention.
Embodiment
Below the present invention is described in detail in conjunction with the drawings, but the present invention is not limited to following content.
Fig. 3 has shown filtering head of the present invention two types, is called as base flow filtering head 9 and height respectively and flows through filter 10.Flow through at base flow filtering head 9 and height and all to have technology aeration hand-hole 11 on the filter 10.Wherein, the technology aeration inlet 11 on base flow filtering head 9 is positioned at higher level attitude (near shower nozzle), no matter is the operational phase that is in which biological filter, and this air inlet port all is positioned at air cushion layer, enlivens with effective so base flow filtering head 9 remains.In addition, the technology aeration inlet 11 that height flows through on the filter 10 is positioned at relatively low level attitude, when the ratio of technology aeration flow and/or air flow quantity/discharge hour, air cushion layer will not reach the position of this air inlet port, so in these cases, these filtering heads will be invalid, when the ratio when technology aeration flow and/or air flow quantity/discharge increases, the thickness of air cushion layer increases, and these air inlet ports can come to life and be effective.
In order to handle the sewage under various flows and the pollution load condition effectively, BAF must be able to adapt to large-scale air flow quantity and air/water ratio.
As shown in Figure 6, in the present invention, two kinds of dissimilar filtering heads (base flow filtering head and height flow through filter) have been installed in identical filter tank, under the condition of carrying out the alternating expression air feed, at the initial stage of carrying out gas, water supply with low-down air/water flow rate ratio, air cushion layer is thinner, and the air inlet port that is positioned at the higher level position of base flow filtering head is immersed in air cushion layer fully, the sustainable aeration that stably provides.And,, can not produce any influence to the supply of the basic air of biological filter even there is error in the horizontal direction in the filter layer yet.
Under the air/water flow rate ratio of medium level, the thickness of air cushion layer increases to some extent, but because therefore the air/water interface in air cushion layer becomes invalid at the technology aeration hand-hole that is in the lower level position that height flows through in the filter because of failing to be immersed at limited region memory very near advancing technology aeration hand-hole in the regional area that civil engineering causes.But,, still less by the influence that their produce to the uneven distribution of air because these filtering heads only provide 5～25% the air that accounts for total air flow quantity in this intermediary operation stage.
In Fig. 7, demonstrated under different air/water flow rate ratios, by base flow filtering head and the high percentage that flows through the technology aeration flow that filter provides.As can be seen, in low air/discharge ratio stage, almost completely provide the technology aeration by the base flow filtering head; In the medium air/water flow rate ratio stage, the technology aeration flow that is flow through filter and provided by height rises to some extent, and higher air/after the discharge ratio stage, all filtering heads all can provide air distribution fully uniformly when entering.Therefore, by two types filtering head (base flow filtering head and height flow through filter) is installed simultaneously, no matter under any operating environment, all can realize the distributing fully uniformly of technology aeration of major portion.Thereby the filtering layer that has guaranteed whole BAF at any time, any position, all can obtain uniformly basic oxygen supply.And when higher oxygen supply demand, extra oxygen flows through filter and carries through becoming effective height partially, thereby the total thickness of air cushion layer can be limited in below the maximum ga(u)ge of design.
In the present invention, though will be according to concrete hydraulics and difference to some extent to being provided with of the distance between base flow filtering head and the high technology aeration hand-hole that flows through on the filter, the vertical range difference between preferred base flow filtering head and the high technology aeration hand-hole that flows through on the filter is 10～40mm.And the distance between the technology aeration hand-hole of base flow filtering head and back flushing air hand-hole is preferably 40～80mm.
In addition, in order to optimize the processing property of BAF on the whole, except above-mentioned filtering head has the technology aeration hand-hole and size thereof of different positions, also must be to filtering head and other features relevant with its installation, be optimized selection as the packing density of filtering head on the length of the size of back flushing air inlet port and position, filtering head tail pipe and internal diameter, the filter layer, base flow filtering head and features such as high ratio that flows through filter and arrangement mode.
Have no particular limits for the quantity and the arrangement mode that are installed on two kinds of dissimilar filtering heads on the filter layer, it can be according to the relating operation condition of determining when building BAF factory, for example flow velocity and air/water ratio etc., and carry out meticulous adjusted design, and be installed in the filter layer with elastic arrangement mode.Wherein, the sum of the filtering head on every square metre filter layer is preferably 50～65, and the number of base flow filtering head is no less than 50% of total filtering head number, and height flows through 50% of the no more than total filter number of filter number.For example, in the situation as shown in Figure 4, in per 4 filtering heads, have 3 to be as the base flow filtering head, that is, in the filtering head of this BAF, have 75% for the base flow filtering head, 25% flows through filter for height.Three kinds of differences and for example in Fig. 8, have been represented and feasible arrangement mode.In Fig. 8 a, the base flow filtering head is 5: 1 with the high ratio that flows through filter, and arranges in an orderly manner according to illustrated arrangement mode; Among Fig. 8 b, the base flow filtering head is 3: 1 with the high ratio that flows through filter, and arranges in an orderly manner according to illustrated arrangement mode; Among Fig. 8 c, the base flow filtering head is 2: 1 with the high ratio that flows through filter, and arranges in an orderly manner according to illustrated arrangement mode.
Diameter for technology aeration hand-hole has no particular limits, but for the maximum height (corresponding to the pressure-losses) that limits air cushion layer at the air hand-hole, technology aeration hand-hole must have enough big diameter, for example, be 2mm, like this, when air flow quantity after a little while, cause by the pressure-losses of this air inlet port very low.Therefore, for corresponding with maximum load, base flow filtering head and the high diameter that flows through the technology aeration hand-hole on the filter are preferably 1.5～3.0mm.
In addition, because civil engineering can not reach very high tolerance range, large-scale filter layer can not be constructed to level fully, even for build for the extraordinary filter layer, also need to consider mostly to be most the lateral error of 0.5mm to 10mm usually.Therefore, under the situation of actually operating, if effectively the quantity of air inlet port all is equal for all flows, just can bring problem to carrying out uniform air distribution on surface, whole filter tank.For this reason, the distance of the interface of air/water and technology aeration hand-hole can not be less than 10mm, otherwise that the filtering head that those out of true because of civil engineering are installed lowly excessively just can become is invalid.
In addition, the diameter of back flushing air hand-hole is preferably 3～5mm, and the length of tail pipe (length from the technology aeration hand-hole of base flow filtering head to the bottom) is preferably 100～300mm, and the internal diameter of tail pipe is preferably 10～30mm.
In addition, surpass under the situation about departing from of common horizontal direction, can also further carry out the adjustment of vertical direction to the air inlet port position of the filtering head of above-mentioned arrangement by setting device when existing at the filter layer.For example, described setting device can be the horizontal adjustment ring that is clipped in filter layer top and shower nozzle lower edge.
The present invention will be further described by embodiment more below.
Embodiment 1
With a water yield is 10,000m
3The sanitary sewage disposal factory of/d is an example, adopts back nitration treatment technology, and average influent ammonium concentration is 10mg/l, and changes during with peak flow or low flow.Treatment plant contains two groups of Up-flow Biological Aerated Filter, and every packet size is 5 meters * 3 meters, is 7.2 meters highly, and being filled with highly is 4 meters swelling clay filtrate, and filtrate top and pond apex distance are from being 2 meters.The filter layer has been installed 820 filtering heads of the present invention altogether, wherein 270 (33%) for height flows through filter, 550 (67%) are the base flow filtering head.
When the gas-water ratio in average when water inlet was 1 to 1, when only adopting the filtering head of same type, air distribution can't be average, but adopted the homogeneity that can improve air distribution behind 67% the base flow filtering head greatly.Gas-water ratio be 1 to 1 or＜1 to 1 the time, has only the generation effect of base flow filtering head and air is evenly distributed, and when peak flow, height flows through filter generation effect, and introduce required air simultaneously.
Embodiment 2
With another water yield is 10,000m
3/ d, the sanitary sewage disposal factory that average influent ammonium concentration is 10mg/l is an example, the nitrated two-stage Up-flow Biological Aerated Filter treatment process of denitrogenation and back before adopting, back level nitrated biological filter water outlet (containing a large amount of nitrate) with internal reflux to the prime denitrogenation biological filter, in the two-stage biofilter, prime can't aeration then level can aeration, the both is equipped with filtering head.The flow velocity that the nitrate internal reflux will cause the biological filter increases, but because ammonia nitrogen concentration is constant, worker's cloth art aeration requires constant, this moment, general flow velocity reached 10～14m/h, gas-water ratio was 1 to 1.3 (containing internal reflux), and this uses 50% base flow filtering head and 50% height to flow through filter, can uniform distribution to guarantee air.
Embodiment 3
With a water yield is 4000m
3The sanitary sewage disposal factory of/d is an example, be of a size of 5 meters * 3 meters, highly be in 6 meters the Up-flow Biological Aerated Filter, being filled with highly is 4 meters swelling clay filtrate, filtrate top and pond apex distance are from being 2 meters, the filter layer has been installed 897 filtering heads of the present invention, wherein 299 (33.3%) for height flows through filter, 598 (66.7%) are the base flow filtering head.
When the BOD volumetric loading is 1.22kg/m
3D, ammonia nitrogen volumetric loading are 0.2kg/m
3D, nitrate recurrence rate be 180%, when gas-water ratio is 1 to 3, during with pre-denitrogenation and nitrated two-stage biofilter, the BOD clearance reaches 95%, ammonia nitrogen removal frank reaches 96%, nitrogen removal rate reaches 72%.
Claims (9)
1. BAF, it is made up of water inlet distribution device, technology aerating apparatus, back flushing distribution device, pond, filter material layer, filter layer, middle part water-freeing arrangement and water outlet; Described filter layer is used to support filtrate; Described filtering head is installed on the described filter layer, and it is made up of shower nozzle and tail pipe, has opening water supply in the lower end at tail pipe and enters, and has technology aeration hand-hole and back flushing air hand-hole on tube wall; Water and air is introduced into below the filter layer, and flows upward abreast by granule filter material by described filtering head, it is characterized in that,
Described filtering head comprises that base flow filtering head and height flow through filter, is positioned at higher level attitude at the technology aeration hand-hole on the tube wall of this base flow filtering head with respect to the technology aeration hand-hole on the tube wall that flows through at this height on the filter.
2. BAF according to claim 1 is characterized in that, the vertical range difference between described base flow filtering head and the high technology aeration hand-hole that flows through on the filter is 10～40mm.
3. BAF according to claim 1 and 2 is characterized in that, the distance between the technology aeration hand-hole of described base flow filtering head and back flushing air hand-hole is 40～80mm.
4. BAF according to claim 1 and 2 is characterized in that, describedly is installed in the base flow filtering head and the high size that flows through the technology aeration hand-hole of filter can be different.
5. BAF according to claim 1 is characterized in that, also has extra inlet mouth at described filtering head afterbody.
6. BAF according to claim 1 is characterized in that, described filtering head also has the setting device of the air inlet port position that is used for the vertical adjusting filtering head, and this setting device is the horizontal adjustment ring that is clipped in filter layer top and shower nozzle lower edge.
7. BAF according to claim 1 is characterized in that the number of base flow filtering head is no less than 50% of total filtering head number, and height flows through 50% of the no more than total filter number of filter number.
8. BAF according to claim 1, it is characterized in that, the diameter of the technology aeration hand-hole on the base flow filtering head is 1.5～3.0mm, the diameter that height flows through the technology aeration hand-hole on the filter is 1.5～3.0mm, the diameter of back flushing air hand-hole is 3～5mm, the length of tail pipe is 100～300mm, and the internal diameter of tail pipe is 10～30mm.
9. the aligning method of aeration filter head in the BAF of claim 1, it is characterized in that, select the base flow filtering head and highly flow through the mode that filter is installed in the filter layer of BAF according to the expose to the sun flow of G﹠W of the different technology that flows into BAF, arrange with the ratio or the certain rule that change.
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| CNB2004100339407A CN100425549C (en) | 2004-04-19 | 2004-04-19 | Aeration biological filter tank and arraying method of aeration filtering head |
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| CNB2004100339407A CN100425549C (en) | 2004-04-19 | 2004-04-19 | Aeration biological filter tank and arraying method of aeration filtering head |
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| CN100425549C CN100425549C (en) | 2008-10-15 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102151426A (en) * | 2011-02-22 | 2011-08-17 | 中国水电顾问集团中南勘测设计研究院 | Homogeneous particle filter material reverse granularity rapid filter |
| CN104003507A (en) * | 2014-05-23 | 2014-08-27 | 广州市金龙峰环保设备工程有限公司 | Quick biological filtration water treatment reactor and construction method thereof |
| CN108635919A (en) * | 2018-05-24 | 2018-10-12 | 深圳市清泉水业股份有限公司 | A kind of Aerated gas-water back-impacting washing method without backwash water pump and backwash pond |
| CN110563125A (en) * | 2019-09-23 | 2019-12-13 | 浙江联池水务设备股份有限公司 | Sewage treatment equipment |
| CN110589961A (en) * | 2019-09-23 | 2019-12-20 | 浙江联池水务设备股份有限公司 | Biological contact oxidation filter |
| CN110606544A (en) * | 2019-09-25 | 2019-12-24 | 浙江联池水务设备股份有限公司 | Biological aerated filter with small floor area |
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| FR2557558B1 (en) * | 1984-01-02 | 1986-05-23 | Degremont Sa | UNDERWATER FILTER FILLED WITH GRANULAR MATERIAL |
| JP2000185293A (en) * | 1998-12-22 | 2000-07-04 | Sumitomo Heavy Ind Ltd | Biological filter apparatus |
| CN2357002Y (en) * | 1998-12-28 | 2000-01-05 | 胡天军 | Aerating biological filter |
| ATE273245T1 (en) * | 2000-05-12 | 2004-08-15 | Delphin Umwelttechnik Gmbh | METHOD AND REACTOR FOR THE BIOLOGICAL AND/OR PHYSICAL ELIMINATION OF UNDESIRABLE WATER CONTENTS FROM WATER |
| CN2595797Y (en) * | 2003-08-04 | 2003-12-31 | 郑俊 | Long Handle filter head special for aeration biological filter pool |
-
2004
- 2004-04-19 CN CNB2004100339407A patent/CN100425549C/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102151426A (en) * | 2011-02-22 | 2011-08-17 | 中国水电顾问集团中南勘测设计研究院 | Homogeneous particle filter material reverse granularity rapid filter |
| CN104003507A (en) * | 2014-05-23 | 2014-08-27 | 广州市金龙峰环保设备工程有限公司 | Quick biological filtration water treatment reactor and construction method thereof |
| CN104003507B (en) * | 2014-05-23 | 2016-05-25 | 广州市金龙峰环保设备工程有限公司 | Quick bio filtered water treatment reactor and construction method thereof |
| CN108635919A (en) * | 2018-05-24 | 2018-10-12 | 深圳市清泉水业股份有限公司 | A kind of Aerated gas-water back-impacting washing method without backwash water pump and backwash pond |
| CN110563125A (en) * | 2019-09-23 | 2019-12-13 | 浙江联池水务设备股份有限公司 | Sewage treatment equipment |
| CN110589961A (en) * | 2019-09-23 | 2019-12-20 | 浙江联池水务设备股份有限公司 | Biological contact oxidation filter |
| CN110589961B (en) * | 2019-09-23 | 2022-08-12 | 浙江联池水务设备股份有限公司 | Biological contact oxidation filter |
| CN110606544A (en) * | 2019-09-25 | 2019-12-24 | 浙江联池水务设备股份有限公司 | Biological aerated filter with small floor area |
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| Publication number | Publication date |
|---|---|
| CN100425549C (en) | 2008-10-15 |
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