CN107434299A - A kind of synchronous nitration and denitrification filter tank - Google Patents

A kind of synchronous nitration and denitrification filter tank Download PDF

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Publication number
CN107434299A
CN107434299A CN201710403501.8A CN201710403501A CN107434299A CN 107434299 A CN107434299 A CN 107434299A CN 201710403501 A CN201710403501 A CN 201710403501A CN 107434299 A CN107434299 A CN 107434299A
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CN
China
Prior art keywords
pond
sand
water inlet
filtrate
pipe
Prior art date
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Pending
Application number
CN201710403501.8A
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Chinese (zh)
Inventor
陈传艳
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XIAMEN BEST CLEAN ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
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XIAMEN BEST CLEAN ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
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Filing date
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Priority to CN201710403501.8A priority Critical patent/CN107434299A/en
Publication of CN107434299A publication Critical patent/CN107434299A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/301Aerobic and anaerobic treatment in the same reactor
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/302Nitrification and denitrification treatment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/14Maintenance of water treatment installations
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/16Regeneration of sorbents, filters

Abstract

The invention discloses a kind of synchronous nitration and denitrification filter tank, including pond body;At the top of filtrate bed under liquid level in pond body;Water inlet system is provided with venturi ejector;Scrubbing system includes some sand-washing devices, and sand-washing device is extending at least partially into pond body under liquid level and on filtrate bed;Air lift system is located at outside pond body, and its upper and lower ends connects with scrubbing system and pond body bottom respectively;Sewage carries out denitrification, nitrification and filtering after entering filtrate bed;Constantly moved down during filtrate processing sewage until being cleaned behind pond body bottom by air lift system improving to scrubbing system, drop down onto down again at the top of filtrate bed and then moved down again in pond body and sewage is handled, with the constant processing of this circular regeneration and sewage of realizing filtrate.Manufacturing cost of the present invention is low, and effluent quality is good, is easy to repair and safeguards.

Description

A kind of synchronous nitration and denitrification filter tank
Technical field
The invention belongs to the filter tank technical field of filtering in sewage disposal, and in particular to a kind of synchronous nitration and denitrification filter Pond.
Background technology
Usual filter tank can be divided into pressure filter and Gravity filter.Gravity filter can be divided into two kinds of shapes of fixed bed and moving bed Formula, fixed bed filter tank are a kind of shallow-layer filtering filter tanks, and applicating history is longer, and it has point of slow filter and rapid filter;Slow filter Pond is superseded;Rapid filter is divided into water and rinses rapid filter and air water joint flushing filter tank, such as:Four valve filter tanks, double-valve filter pool, valveless Filter tank, siphon filter, movable Hood Filter, filter block filter tank, V-type filter tank, shutter filter, U-tube filter tank etc..These old-fashioned filter tanks The defects of maximum is:The backwashing system of bulky complex be present, the problems such as floor space is big.Moving bed in-depth filtration filter tank is relative The filtering of fixed bed shallow-layer is a kind of new development trend for filter tank.
The content of the invention
It is an object of the invention in place of overcome the deficiencies in the prior art, there is provided a kind of synchronous nitration and denitrification filter tank, Manufacturing cost is low, and effluent quality is good, is easy to repair and safeguards.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of synchronous nitration and denitrification filter tank, including:
Pond body, the pond body top water outlet;
Filtrate bed, is located in pond body, at the top of filtrate bed under liquid level in pond body;
Water inlet system, including be interconnected first water inlet outer tube and water inlet injection well downhole flow regulator, it is described first water inlet outer tube on set There is venturi ejector, the water inlet injection well downhole flow regulator is located in filtrate bed;
Scrubbing system, above pond body, include the sand-washing device of some circumferential uniform intervals arrangements, at least portion of sand-washing device Divide and stretch into pond body under liquid level and on filtrate bed;
For the air lift system being promoted to the filtrate of pond body bottom in scrubbing system, including sand extraction tube and sand pump is carried, carried Sandpipe is located at outside pond body, and sand extraction tube lower end connects with pond body bottom, and sand extraction tube upper end connects with scrubbing system;Sand pump is carried to be arranged on On sand extraction tube;
Nitrification liquid return-flow system, including the second water inlet outer tube, backflow outer tube and the backflow injection well downhole flow regulator being interconnected;Described time Flow liquid level and backflow injection well downhole flow regulator on filtrate bed in outer tube connection pond body;The backflow injection well downhole flow regulator is located in filtrate bed and is located at Under water inlet injection well downhole flow regulator;Check valve is additionally provided with the backflow outer tube;
About 90% sewage and about 100% water outlet (equivalent to one sewage quantity) are mixed into filtrate through triangular-notch weir recirculation water Bed bottom section carries out denitrification and filtering, and filtrate bed nitrification region is flowed up into by the mixed liquor of denitrification and filtering Nitrified and filtered;About 10% sewage enters filtrate bed nitrification zone through venturi ejector and air are fused by water inlet system Release band pressure solution gas and nitrified behind domain with the denitrification liquid flowed from the bottom to top and filter process, after nitrification and filtering Water up to standard along pond body rise through triangle effluent weir flow out;After filtrate processing sewage and it is displaced downwardly to behind pond body bottom by air lift system Dropped down onto under being promoted to after scrubbing system cleans at the top of filtrate bed and then moved down again in pond body and sewage is handled, with this Realize the circular regeneration of filtrate.
In one embodiment:The washed-out sand passage of fold-line-shaped, washed-out sand passage upper end and the sand extraction tube are provided with the sand-washing device Connection, washed-out sand passage lower end are stretched into pond body under liquid level and on filtrate bed;The scrubbing system also includes blow-off pipe, The blow-off pipe connects with washed-out sand channel upper.
In one embodiment:The sand-washing device is four.
In one embodiment:The water inlet injection well downhole flow regulator includes the center water inlet pipe arranged vertically and some horizontally disposed water inlets Sparge pipe, the center water inlet pipe connect with the first water inlet outer tube;Sparge pipe is radial is arranged in filtrate bed for some water inlets Interior and connected with center water inlet pipe, water inlet sparge pipe top uniformly offers some apopores.
In one embodiment:If the backflow injection well downhole flow regulator includes the central backflow pipe and dry refluxing sparge pipe arranged vertically, should Central backflow pipe connects with backflow outer tube;If the dry refluxing sparge pipe connects with central backflow pipe, opened up on the sparge pipe that flows back There are some fluid holes.
In one embodiment:Effluent weir is provided with the top of the pond body, the effluent weir is triangular-notch weir.
In one embodiment:The pond body bottom is in back taper, and the angle of pond body bottom sidewall and horizontal plane is 50 °~60 °.
In one embodiment:The filtrate is sand.
In one embodiment:1~3mm of particle diameter of the filtrate, level proportioning K80≤1.4.
In one embodiment:Rectification body is additionally provided with the filtrate bed, the rectification body is under water inlet injection well downhole flow regulator.
Compared with background technology, it has the following advantages that the technical program:
(1) filtering velocity is high, reachable 12~15m/h, is 2~3 times of conventional fixed bed shallow-layer filter tank filtering velocity;
(2) filter tank floor space is few, is the half of fixed bed shallow-layer filter tank floor space to 1/3rd;
(3) for filtrate bed all the time in mobile fluidized state, filtrate is not hardened and occurs without channeling;
(4) filter tank is continuously filtered, continuous effluent, filtrate integral filter, so holding filth capacity is big, about 8~10kg/m3, Flushing cycle is grown, and filtrate bed filter efficiency is high, and effluent quality is good and stably, and without initial filter water;
(5) the achievable power-free back washing of the present invention, so filtering environment is good, equipment and collecting-tank are washed in both non-recoils, again Eliminate huge pond water pump and blower system and arrange complicated air water pipe network system;
(6) sewage forms the mixing wastewater with air liquid of high speed after venturi ejector, can realize water distribution and aeration simultaneously, Improve dissolution rate and utilization rate of the oxygen in sewage;
(7) sand-washing device is simple in construction, compact, and manufacturing cost is low;Multiple sand-washing devices are provided separately so that filtrate bed thickness phase To uniform, pond height is relatively low;Multiple sand-washing device relative loads are low, so washed-out sand is thoroughly clean and race sand is few;
(8) molten gas aeration nitrification is carried out on filtrate bed top, the utilization rate of oxygen is high;Part water backflow after the processing of filtrate bed Denitrification is carried out to filtrate bed bottom, for sewage after nitrification and denitrification is handled, ammonia therein is changed into nitrogen discharge, purification Effect is good, and the total values of nitrogen might of water outlet is low, and water quality is good;
(9) washed-out sand draining can be digital control by magnetic valve, and itself and effluent quality parameter interlock, can be right by effluent quality Washed-out sand draining is regulated and controled.
(10) air lift system is located at outside pond body, is easy to repair and is safeguarded.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the synchronous nitration and denitrification filter tank overall structure diagram of the present invention.
The synchronous nitration and denitrification filter tank that Fig. 2 is the present invention actually uses schematic diagram.
Fig. 3 is A direction views in Fig. 1.
Fig. 4 is B direction views in Fig. 1.
Fig. 5 is the effluent weir schematic diagram of the present invention.
Fig. 6 is the sand-washing device structural representation of the present invention.
Reference:
Pond body 10;Effluent weir 11;Water reserve 12;Rectification body 13;
Filtrate bed 20;
Water inlet system 30;First water inlet outer tube 31, venturi ejector 311;Center water inlet pipe 32;Water inlet sparge pipe 33, Apopore 331;
Air lift system 40;Sand extraction tube 41;Carry sand pump 42;
Scrubbing system 50;Sand-washing device 51, washed-out sand passage 511;Blow-off pipe 52;
Nitrification liquid return-flow system 60;Flow back outer tube 61, check valve 611;Central backflow pipe 62;Flow back sparge pipe 63;Second Water inlet outer tube 64.
Embodiment
Present disclosure is illustrated below by embodiment:
It refer to Fig. 1 to Fig. 5, a kind of synchronous nitration and denitrification filter tank, including:
Pond body 10, the top of pond body 10 are provided with effluent weir 11, the 11 preferred triangular-notch weir of effluent weir, the water outlet of effluent weir 11 by Digital Valve controlling;The bottom of pond body 10 is in back taper, and the bottom sidewall of pond body 10 has certain angle, preferably 55 ° with horizontal plane;
Filtrate bed 20, filtrate are, for example, sand;Filtrate bed 20 is located in pond body 10, and the top of filtrate bed 20 is positioned at liquid in pond body 10 Under face;
Water inlet system 30, including the first water inlet outer tube 31 and water inlet injection well downhole flow regulator being interconnected;The first water inlet outer tube 31 connect sewage source, and the first water inlet outer tube 31 is provided with venturi ejector 311, and venturi ejector 311 separately connects air pump; The water inlet injection well downhole flow regulator is fixed in pond body 10 by support, including the center water inlet pipe 32 arranged vertically and some horizontally disposed Water inlet sparge pipe 33, the center water inlet pipe 32 connection the first water inlet outer tube 31, the center of filtrate bed 20 in pond body 10;It is if described Dry water inlet sparge pipe 33 connects center water inlet pipe 32, and is evenly arranged in filtrate bed 20 around center water inlet pipe 32, such as in Ring-type radiation mesh arrangement, intake sparge pipe 33 on uniformly offer some apopores 331;
Air lift system 40, including sand extraction tube 41 and carry sand pump 42, sand extraction tube 41 is located at outside pond body 10, the lower end of sand extraction tube 41 with The bottom of pond body 10 connects, and the upper end of sand extraction tube 42 connects with scrubbing system 50;Sand pump 42 is carried to be arranged on sand extraction tube 41;By carrying sand The filtrate of the bottom of pond body 10 is transported in the scrubbing system 50 of the top of pond body 10 by pump 42 through sand extraction tube 41;
Scrubbing system 50, above pond body 10, include the sand-washing device 51 and blow-off pipe of four circumferential uniform intervals arrangements 52;The washed-out sand passage 511 of fold-line-shaped is provided with the sand-washing device 51, there is good hydraulic characteristic(s) and washed-out sand part throttle characteristics;Four The upper end of washed-out sand passage 511 of individual sand-washing device 51 connects with sand extraction tube 41, the lower end of washed-out sand passage 511 stretch into pond body 10 liquid level it Descend and be located on filtrate bed 20;The blow-off pipe 52 connects with the top of washed-out sand passage 511;Blow-off pipe 52 is also by digital valve Control, and can be linked with effluent quality at effluent weir 11;
Nitrification liquid return-flow system 60, the nitrification liquid return-flow system 60 include the second water inlet outer tube 64, backflow outer tube 61 and returned Flow injection well downhole flow regulator;The second water inlet outer tube 64 also connects sewage source;The center that the backflow injection well downhole flow regulator includes arranging vertically is returned If flow tube 62 and dry refluxing sparge pipe 63, it is central that the central backflow pipe 62 be located at filtrate bed 20 in pond body 10, can with it is described in Heart water inlet pipe 32 is arranged in socket with one heart;If the dry refluxing sparge pipe 63 connects with central backflow pipe 62, flow back sparge pipe 63 On offer some fluid holes.Flow back outer tube 61 lower end connection central backflow pipe 62, in upper end connection pond body 10 filtrate bed 20 it On liquid level, be additionally provided with water pump on the outer tube 61 that flows back and water can be allowed unidirectionally to flow into the check valve 611 of filtrate bed 20.
Be additionally provided with rectification body 13 in the pond body 10, rectification body 13 be located at the center of filtrate bed 20 and positioned at water inlet injection well downhole flow regulator it Under;The outer wall of rectification body 13 forms an angle with the inwall shape of pond body 10, is easy to Uniform Flow and distribution of the filtrate in pond body 10.
Onsite application mode of the present invention is as follows:
About 90% sewage is entered by the second water inlet outer tube 64, the effluent weir 11 of about 100% (equivalent to one sewage quantity) Water outlet is flowed back by nitrification liquid return-flow system 60, and the sewage that the water of backflow is come in the second water inlet outer tube 64 mixes, outer via backflow Pipe 61, central backflow pipe 62, backflow sparge pipe 63 flow back into the bottom of filtrate bed 20, under water inlet sparge pipe 33, pond body 10 The denitrification zone region of filtrate bed 20 on bottom carries out denitrification and filtering, and the denitrification liquid by denitrification and filtering is upward The nitrification region flowed on denitrification region is nitrified and filtered;About 10% sewage is entered by the first water inlet outer tube 31 Enter, in the presence of venturi ejector 311 and air fuses the mixing wastewater with air liquid for forming high speed, improves dissolution rate of oxygen and profit With rate, mixing wastewater with air liquid reaches water inlet sparge pipe 33 via center water inlet pipe 32, then by the apopore 331 on water inlet sparge pipe 33 Into in the nitrification region of filtrate bed 20, release band pressure solution gas, and mix with the denitrification liquid flowed from the bottom to top nitrified and Filter process, the water up to standard after nitrification and filtering rise along pond body 10 and finally flowed out from the effluent weir 11 of top.It is this The mode of nitration denitrification is carried out simultaneously, after stable, can significantly reduce the total nitrogen of water outlet at effluent weir 11.
Gradually absorption pollution suspension reaches saturation, the bottom of pond body 10 to filtrate in filtrate bed 20 during sewage is purified The saturation filtrate in portion and the mixture (M) of water air compressor machine drive carry sand pump 42 in the presence of, moved upwards through sand extraction tube 41, Strong rushing is produced in motion process, inside mixture (M) and touches rubbing action, promotes filtrate to be separated with pollution suspension;Mixing After thing (M) reaches sand-washing device 51, Fig. 6 is refer to, suspension is polluted and water is discharged by the blow-off pipe 52 on the top of washed-out sand passage 511 (S);Filtrate enters in the washed-out sand passage 511 of sand-washing device 51, is precipitated by the gravity of filtrate in the washed-out sand passage 511 of fold-line-shaped Collision is fallen, while the water (W) in water reserve 12 is most filtered at last also along the up filtrate phase separation with falling of washed-out sand passage 511 Material cleans up, and also discharges (S) by blow-off pipe 52 after up water purification cleaning filtrate, the filtrate (F) cleaned up leads to from washed-out sand The lower end of road 511 drops down onto the top of filtrate bed 20.In water reserve 12 water purification along the up power of washed-out sand passage 511 by liquid in sand-washing device 51 The driving of the difference of position and the liquid level in pond body 10 is produced, and the difference of the liquid level is adjusted by the digital Valve controlling of effluent weir 11 and blow-off pipe 52 Section.So, the bottom filtrate of pond body 10 drops down onto filtrate bed 20 under being constantly promoted to after scrubbing system 50 cleans by air lift system 40 and pushed up Portion, it is then slowly mobile gradually downward and sewage is handled, filtrate saturation and after moving down into up to the bottom of pond body 10 again by Air lift system 40 is promoted to scrubbing system 50 and cleaned, and the cleaning filtrate after cleaning works into filtrate bed 20 once more, with this reality The circular regeneration of existing filtrate, go round and begin again work, and purified water continually flows out.
Among the present invention, venturi ejector 311 is provided with water inlet system 30, sewage and gas can be sufficiently mixed And accelerate, the mixing wastewater with air liquid of high speed is formed, is easy to the processing of follow-up filtrate bed 20.
Among the present invention, there is provided the sand-washing device 51 of four circumferential uniform intervals arrangements, the filtrate after cleaning is washed by four The top of filtrate bed 20 is dropped down onto under in sand device 51, forms four small spikes, it is more scattered, after the more single sand-washing device 51 of height is handled Filtrate bed height is low, advantageously reduces the height of pond body 10, and the thickness of filtrate bed 20 and distribution are also more uniformly distributed;It is meanwhile multiple Sand-washing device 51 works simultaneously, and relative load is low, and washed-out sand is thoroughly clean and race sand is few.
Among the present invention, air lift system 40 is located at outside pond body, is easy to safeguard and is overhauled;Carry sand pump 42 and be based on aerodynamics Principle, lifting filtrate amount depend on the amount for entering the compressed air for carrying sand pump 42.
The synchronous nitration and denitrification filter tank of the present invention belongs to moving bed in-depth filtration filter tank, is mainly used in sewage disposal, There is special efficacy to dephosphorization denitrogenation, suspension, organic matter removal.Therefore, the filtrate in filtrate bed 20 requires that effective grain size is 1~3mm, Level proportioning K80≤1.4;The sand grains more than 5mm will must not be had by conscientiously carefully screening by being fitted into filtrate in pond body 10 in filter sand Fallen into debris, such as:Plastic, cement block, rope, welding rod, the leftover of bolt of cloth, wood chip, fiber etc..Filtrate cycle period is about 12h.Carry Sand pump 42 requires that air compressor machine supply is clean, no dust, exclusion, without elaioleucite.
The pond body 10 in the synchronous nitration and denitrification filter tank of the present invention may be designed to circular, square or rectangle, processing water rule Mould size, from 1000m3/ d to 1.0 × 104m3/d、2.0×104m3/d、5.0×104m3/d、10×104m3/ d etc., Design and use.Pond body 10 may be designed to cylinder or square body during small-scale water;Pond body 10 can design during extensive water Integral formula underground or the square pond of semi-underground type or rectangle form pool.
The synchronous nitration and denitrification filter tank most common failure of the present invention may have:
Carry sand pump 42 and do not carry sand, mainly there is the reason for three aspects --- first, it is one of factor that filtrate is hardened, ascertain the reason Eliminate hardened;Flocculation aid PAM is forbidden to add;Carrying has big block foreign matter in sand pump 42, removed.Second, sand extraction tube 41 There is foreign matters from being blocked, sand pump 42 will be carried and lift removing foreign matter.Third, putting forward the air pressure of sand pump 42 or tolerance deficiency, check that air supply system is protected Testimony gas source of the gas is stable, safety;Sand-washing device 51 shakes out not smooth, and possible sand-washing device 51 has a clogging, checks that sand-washing device 51 is clear Impurity removing carries sand pump 42 to put forward sand amount too many, should reduce carry sand pump 42 carry sand amount prevent sand-washing device 51 block shake out it is not smooth.
The water outlet of pond body 10 is not up to standard, first checks for whether influent quality meets design requirement;Next carries whether sand pump 42 carries Sand amount is too big, causes filtrate cleaning not thorough;The liquid level of sand-washing device 51 and the liquid level size of the difference of pond body 10 are checked in addition, if are influenceed Washed-out sand water;The digital valve of sand-washing device 51 and effluent weir 11 should be adjusted in time to ensure that washed-out sand water supplies.
It is described above, only present pre-ferred embodiments, therefore the scope that the present invention is implemented can not be limited according to this, i.e., according to The equivalent changes and modifications that the scope of the claims of the present invention and description are made, all should still it belong in the range of the present invention covers.

Claims (10)

  1. A kind of 1. synchronous nitration and denitrification filter tank, it is characterised in that:Including:
    Pond body, the pond body top water outlet;
    Filtrate bed, is located in pond body, at the top of filtrate bed under liquid level in pond body;
    Water inlet system, including the first water inlet outer tube and water inlet injection well downhole flow regulator being interconnected, the first water inlet outer tube are provided with text Ejector in mound, the water inlet injection well downhole flow regulator are located in filtrate bed;
    Scrubbing system, above pond body, include the sand-washing device of some circumferential uniform intervals arrangements, at least part of sand-washing device is stretched Enter in pond body under liquid level and on filtrate bed;
    For the air lift system filtrate of pond body bottom being promoted in scrubbing system, including sand extraction tube and carry sand pump, sand extraction tube It is located at outside pond body, sand extraction tube lower end connects with pond body bottom, and sand extraction tube upper end connects with scrubbing system;Carry sand pump and be arranged on and carry sand Guan Shang;
    Nitrification liquid return-flow system, including the second water inlet outer tube, backflow outer tube and the backflow injection well downhole flow regulator being interconnected;Outside the backflow Liquid level and backflow injection well downhole flow regulator in pipe connection pond body on filtrate bed;The backflow injection well downhole flow regulator is located in filtrate bed and positioned at water inlet Under injection well downhole flow regulator;Check valve is additionally provided with the backflow outer tube.
  2. 2. synchronous nitration and denitrification filter tank according to claim 1, it is characterised in that:Fold-line-shaped is provided with the sand-washing device Washed-out sand passage, washed-out sand passage upper end connects with the sand extraction tube, and washed-out sand passage lower end is stretched into pond body under liquid level and is located at On filtrate bed;The scrubbing system also includes blow-off pipe, and the blow-off pipe connects with washed-out sand channel upper.
  3. 3. synchronous nitration and denitrification filter tank according to claim 1, it is characterised in that:The sand-washing device is four.
  4. 4. synchronous nitration and denitrification filter tank according to claim 1, it is characterised in that:It is vertical that the water inlet injection well downhole flow regulator includes The center water inlet pipe of arrangement and some horizontally disposed water inlet sparge pipes, the center water inlet pipe connect with the first water inlet outer tube;Institute State that some water inlet sparge pipes are radial to be arranged in filtrate bed and connect with center water inlet pipe, the sparge pipe top that intakes uniformly is opened Provided with some apopores.
  5. 5. synchronous nitration and denitrification filter tank according to claim 1, it is characterised in that:It is vertical that the backflow injection well downhole flow regulator includes If the central backflow pipe of arrangement and dry refluxing sparge pipe, the central backflow pipe connects with backflow outer tube;If the dry refluxing water distribution Pipe is connected with central backflow pipe, and some fluid holes are offered on the sparge pipe that flows back.
  6. 6. synchronous nitration and denitrification filter tank according to claim 1, it is characterised in that:Water outlet is provided with the top of the pond body Weir, the effluent weir are triangular-notch weir.
  7. 7. synchronous nitration and denitrification filter tank according to claim 1, it is characterised in that:The pond body bottom is in back taper, The angle of pond body bottom sidewall and horizontal plane is 50 °~60 °.
  8. 8. synchronous nitration and denitrification filter tank according to claim 1, it is characterised in that:The filtrate is sand.
  9. 9. synchronous nitration and denitrification filter tank according to claim 1, it is characterised in that:1~3mm of particle diameter of the filtrate, Level proportioning K80≤1.4.
  10. 10. synchronous nitration and denitrification filter tank according to claim 1, it is characterised in that:It is additionally provided with the filtrate bed whole Fluid, the rectification body is under water inlet injection well downhole flow regulator.
CN201710403501.8A 2017-06-01 2017-06-01 A kind of synchronous nitration and denitrification filter tank Pending CN107434299A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710403501.8A CN107434299A (en) 2017-06-01 2017-06-01 A kind of synchronous nitration and denitrification filter tank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710403501.8A CN107434299A (en) 2017-06-01 2017-06-01 A kind of synchronous nitration and denitrification filter tank

Publications (1)

Publication Number Publication Date
CN107434299A true CN107434299A (en) 2017-12-05

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CN201710403501.8A Pending CN107434299A (en) 2017-06-01 2017-06-01 A kind of synchronous nitration and denitrification filter tank

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019221663A1 (en) * 2018-05-18 2019-11-21 Nordic Water Products Ab Continuous sand filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019221663A1 (en) * 2018-05-18 2019-11-21 Nordic Water Products Ab Continuous sand filter

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