CN203999136U - External loop airlift vortex enhanced biological nitrogen removal reactor - Google Patents
External loop airlift vortex enhanced biological nitrogen removal reactor Download PDFInfo
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- CN203999136U CN203999136U CN201420373170.XU CN201420373170U CN203999136U CN 203999136 U CN203999136 U CN 203999136U CN 201420373170 U CN201420373170 U CN 201420373170U CN 203999136 U CN203999136 U CN 203999136U
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Abstract
The utility model discloses a kind of external loop airlift vortex enhanced biological nitrogen removal reactor, it is characterized in that, comprise water distribution section, conversion zone and segregation section, described water distribution section comprises lower short cylinder, in cylinder, be provided with water distributor, microporous aeration disc, water distributor is communicated with water inlet pipe, and microporous aeration disc is communicated with inlet pipe; Conversion zone comprises long cylinder, is provided with multistage Venturi tube in long cylinder, between the two ends of multistage Venturi tube and the port of long cylinder, forms respectively shunting zone, mixing zone, and is communicated with and is formed circulation by left and right circulation tube; Segregation section comprises short cylinder, is provided with the water outlet system of giving vent to anger in cylinder.The utility model, by the setting of microporous aeration disc, mixing zone and multistage Venturi tube, forms vortex flow field in multistage Venturi tube, has effectively strengthened mass transfer usefulness between gas-liquid-solid three-phase; In addition, said structure is combined with shunting zone and left and right circulation tube and is formed outer circulation, forms aerobic-anaerobic alternate environment, makes this reactor have nitration denitrification biological denitrificaion function.
Description
Technical field
The utility model relates to a kind of wastewater treatment biological denitrification reactor, relates in particular to a kind of external loop airlift vortex enhanced biological nitrogen removal reactor.
Background technology
China's water pollution problems is very serious, nitrogen continues to enter water body with sewage, can cause body eutrophication, causes waterplant and algae excessive growth, and deriving thus a series of adverse consequencess such as " wawter bloom ", " red tide ", the financial loss that China causes every year is thus up to over ten billion Yuan.Visible, exploitation efficient denitrification bio-reactor is imperative.
Biological denitrificaion is generally divided into two stages, i.e. nitrated stage and denitrification stage.Under aerobic condition, the ammonia oxidizing bacteria in nitrobacteria and the effect of nitrite-oxidizing bacteria generation biological nitration, ammonia oxidizing bacteria is by the NH in waste water
3-N is oxidized to NO
2 -, nitrite-oxidizing bacteria is by NO
2 -be oxidized to NO
3 -; Under anoxia condition, denitrifying bacterium is by NO
3 -be reduced to N
2, N
2from liquid phase, overflow, realize biological denitrificaion.
In biochemical industry and field of waste water treatment, emerged in large numbers and take the three-phase fluidized-bed bioreactor that internal airlift loop denitrification reactor is representative in recent years, such reactor be take gas, and as power makes, liquid is fully mixed to be incorporated in inside reactor and to circulate, can form aerobic zone and oxygen-starved area, the usefulness with certain denitrogenation, but traditional internal airlift loop reactor flow field is often tending towards complete mixing flow, for bio-reactor, aspect processing waste water usefulness, horizontal sliding fluidised form is more efficient compared with complete mixing flow state.
Utility model content
To be solved in the utility model is that existing internal airlift loop reactor flow field is tending towards complete mixing flow, the technical problem that efficiency is lower.
In order to solve the problems of the technologies described above, the utility model provides a kind of external loop airlift vortex enhanced biological nitrogen removal reactor, it is characterized in that, comprise water distribution section, conversion zone and segregation section from bottom to up, described water distribution section comprises the lower short cylinder of being located on base plate, the lowest part in lower short cylinder outside is provided with and empties mouth, in lower short cylinder, be provided with water distributor, microporous aeration disc, water distributor is communicated with the water inlet pipe of being located at lower short cylinder outside, and microporous aeration disc is communicated with the inlet pipe of being located at lower short cylinder outside; Described conversion zone comprises long cylinder, in long cylinder, be provided with multistage Venturi tube, the two ends up and down of multistage Venturi tube and long cylinder between two ports, form respectively shunting zone, mixing zone up and down, the left and right sides of shunting zone, mixing zone is communicated with and is formed circulation by left circulation tube, right circulation tube respectively; The two ends of multistage Venturi tube are fixed in long cylinder by upper annulus baffle plate, lower annulus baffle plate respectively; Described segregation section comprises short cylinder, is provided with the water outlet system of giving vent to anger in upper short cylinder.
Preferably, described microporous aeration disc and inlet pipe are located in same level, and water inlet pipe and water distributor are located in same level, and microporous aeration disc, inlet pipe arrange higher than water inlet pipe, water distributor, and water inlet pipe, water distributor mouthful are arranged higher than emptying.
Preferably, the lower end of described long cylinder is connected with lower short cylinder by lower flange, and upper end is connected with upper short cylinder by upper flange.
Further, in described lower flange, be provided with lower screen cloth, in upper flange, be provided with upper screen cloth.
Preferably, the described water outlet system of giving vent to anger comprises large mouth taper gas skirt down, and taper gas skirt is communicated with atmosphere by gas cylinder, and expose from upper short cylinder upside the upper end of gas cylinder, gas cylinder is fixed in upper short cylinder by annular overflow weir, and annular overflow weir top is provided with rising pipe.
Further, in described gas cylinder, be provided with wire mesh demister, its height in gas cylinder accounts for 1/5～1/4 of gas cylinder height, can bury in oblivion the foam that aeration process is taken out of.
Preferably, the aspect ratio of described water distribution section, conversion zone, segregation section is 1.0: (3.5～5.5): 1.5; Lower short cylinder, upper short cylinder are identical with the diameter of long cylinder, and aspect ratio is 5.5～7.0.
Preferably, described mixing zone height accounts for 1/8～1/7 of long cylinder height.
Preferably, described multistage Venturi tube is connected to form successively by half Venturi tube and two middle identical Venturi tubes of specification at two ends, between half and half Venturi tube, each Venturi tube and the barrel of long cylinder, form respectively independently heat preservation zone, the lower of heat preservation zone one side is provided with insulation water inlet, and the higher position of opposite side is provided with insulation water out.
Preferably, the height of described multistage Venturi tube accounts for 5/7～3/4 of long cylinder height, and its minimum diameter and long cylinder diameter ratio are: 1; In multistage Venturi tube, the bus of single Venturi tube and the angle between horizontal plane are 50 °～70 °.
Preferably, described shunting zone height accounts for 1/8～1/7 of long cylinder height.
Preferably, described left circulation tube, right circulation tube are symmetrical tri linear shape, and knuckle is 100 °～120 °, and its diameter and long cylinder diameter ratio are 0.45～0.65: 1.
Mixing zone, its both sides are connected with left and right circulation tube lower end respectively, and this region can be diluted input concentration and tentatively be realized gas-liquid-solid three-phase and mix; Shunting zone, both sides are connected with left and right circulation tube upper end respectively, and mixed solution is distinguished stream at this.Circulation tube, this structure is oxygen-starved area, and biological denitrification reaction occurs.The structure of multistage Venturi tube is aerobic zone, biological nitration reaction occurs, and in it, have eddy current field, can effectively strengthen interphase mass transfer.Heat preservation zone can realization response device increased winter temperature rising.Upper and lower screen cloth is fixed by upper and lower flange respectively, can hold back biofilm carrier, prevents that biofilm carrier from washing out.Wire mesh demister can be buried in oblivion the foam that aeration process is taken out of.
The present invention is a kind of biofilm reactor, inside there is a certain amount of filler, in reactor, there is aerobic zone and oxygen-starved area, can realize biological nitrification and denitrification denitrogenation, its agent structure is multistage Venturi tube, this structure is equivalent to the series connection in a plurality of complete mixing flows region, has formed the fluidised form of " inter-stage complete mixing flow, interstage plug flow " in fluidised form.Theoretical according to bio-reactor, the removal efficiency of horizontal sliding fluidised form will be higher than complete mixing flow, and the volume that reaches same treatment efficiency horizontal sliding fluidised form reactor will be less than complete mixing flow.In addition, through Fluent software simulation and fortune test card, have symmetrical vortex flow field in multistage Venturi tube, vortex flow field can effectively reduce resistance to mass transfer, strengthens mass transfer usefulness between gas-liquid-solid three-phase.Therefore, compare traditional internal airlift loop denitrification reactor, the present invention has better nitric efficiency and volume usefulness.
Owing to having adopted above-mentioned technical scheme, the present invention compared with prior art, has following advantage and positively effect:
1) arranging of mixing zone can make water inlet air inlet acutely mix with circulation tube phegma, fully mass transfer, has the effect of dilution water inlet, makes reactor have good capacity of resisting impact load, and because water distributor structure can be suitably simplified in the setting of this structure, can save capital cost;
2) a series of structure settings such as microporous aeration disc, multistage Venturi tube and left and right circulation tube, make in the multistage Venturi tube of reactor in good oxygen condition, in left and right circulation tube, in anoxic condition, make this reactor there is synchronous nitration and denitrification biological denitrificaion function;
3) multistage Venturi tube is equivalent to the structure series connection of a plurality of shrinkage expansions, realize inter-stage complete mixing flow, the fluidised form of interstage plug flow, can form eddy current field in the part of pipe, vortex flow field internal memory is in strong shearing force, can cut down thickness of liquid film in mass transfer process, reduce resistance to mass transfer, effectively strengthen three alternate mass transfer effects;
4) setting of heat preservation zone and recirculated water import and export, can be when reactor assembly temperature be lower (15 ℃ of <) pass into hot water or steam is that reactor heats, guarantee nitration denitrification effect nitric efficiency (temperature is normally carried out in nitration denitrification reaction generally to be needed more than 15 ℃);
5) shunting zone utilizes density variation and upper screen cloth can realize preliminary three phase separation, for after two being separated and making good place mat of the circulation of solidliquid mixture and taper gas skirt;
6) lower screen cloth can prevent that filler from falling into water distribution section, and upper screen cloth can prevent that filler from being taken out of reactor by gas-liquid flow, and upper screen cloth can allow flco mud or the microbial film that comes off passes through, can realization response device in the succession of the old by the new of flora;
7) setting of wire mesh demister on escape pipe, can bury in oblivion a large amount of foams that aeration process is taken out of, guarantees environmental health, the steady running of safeguards system;
8) main body is cylindric, upper and lower ends equal diameters, and compact construction, mechanical strength is good, and reactor aspect ratio is large, and small accommodation area effectively reduces initial cost.
9) be applicable to the processing of nitrogenous organic waste water.Through the examination of laboratory simulation influent waste water fortune, under normal temperature, its volumetric loading can reach 8.5kgCOD/m
3d, total nitrogen volumetric loading is 0.56kg/m
3d.
Accompanying drawing explanation
The structural representation of a kind of external loop airlift vortex enhanced biological nitrogen removal reactor that Fig. 1 provides for the utility model;
Fig. 2 is the sectional view of A-A face in Fig. 1.
Embodiment
For the utility model is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing to be described in detail below.
Embodiment
As shown in Figure 1-2, the structural representation of the external loop airlift vortex enhanced biological nitrogen removal reactor providing for the utility model, comprise water distribution section I, conversion zone II and segregation section III from bottom to up, described water distribution section I comprises the lower short cylinder 3 of being located on base plate 1, the lowest part in lower short cylinder 3 outsides is provided with and empties mouth 28, in lower short cylinder 3, be provided with water distributor 26, microporous aeration disc 25, water distributor 26 is communicated with the water inlet pipe 2 of being located at lower short cylinder 3 outsides, and microporous aeration disc 25 is communicated with the inlet pipe 27 that is arranged on lower short cylinder 3 outsides.Microporous aeration disc 25 is located in same level with inlet pipe 27, and water inlet pipe 2 is located in same level with water distributor 26, and microporous aeration disc 25, inlet pipe 27 arrange higher than water inlet pipe 2, water distributor 26, and water inlet pipe 2, water distributor 26 are arranged higher than emptying mouthfuls 28.In gas cylinder 18, be provided with wire mesh demister 19, its height in gas cylinder 18 accounts for 1/5～1/4 of gas cylinder 18 height, can bury in oblivion the foam that aeration process is taken out of.
Described conversion zone II comprises long cylinder 8, in long cylinder 8, be provided with multistage Venturi tube 10, the two ends up and down of multistage Venturi tube 10 and long cylinder 8 between two ports, form respectively up and down shunting zone 13, mixing zone 6,13Yu mixing zone, shunting zone 6 highly all accounts for 1/8～1/7 of long cylinder 8 height, and the left and right sides of shunting zone 13, mixing zone 6 is communicated with and is formed circulation by left circulation tube 11, right circulation tube 23 respectively; Left circulation tube 11, right circulation tube 23 are symmetrical tri linear shape, and knuckle α is 100 °～120 °, and its diameter d 2 is 0.45～0.65: 1 with the ratio of long cylinder 8 diameter D.The two ends of multistage Venturi tube 10 are fixed in long cylinder 8 by upper annulus baffle plate 12, lower annulus baffle plate 24 respectively.The lower end of long cylinder 8 is connected with lower short cylinder 3 by lower flange 4, and upper end is connected with upper short cylinder 15 by upper flange 14.In lower flange 4, be provided with lower screen cloth 5, in upper flange 14, be provided with upper screen cloth 21.Mixing zone 6 highly accounts for 1/8～1/7 of long cylinder 8 height; Shunting zone 13 highly accounts for 1/8～1/7 of long cylinder 8 height.Described multistage Venturi tube 10 is connected to form successively by half Venturi tube and 2 middle identical Venturi tubes of specification at two ends, between the barrel of half and half Venturi tube, each Venturi tube and long cylinder 8, form respectively independently heat preservation zone 9, the lower of heat preservation zone 9 one sides is provided with insulation water inlet 7, and the higher position of opposite side is provided with insulation water out 22.The height of multistage Venturi tube 10 accounts for 5/7～3/4 of long cylinder 8 height, and its minimum diameter d1 is 0.4～0.6: 1 with the ratio of long cylinder 8 diameter D; In multistage Venturi tube 10, the bus of single Venturi tube and the angle β between horizontal plane are 50 °～70 °.
Described segregation section III comprises short cylinder 15, is provided with the water outlet system of giving vent to anger in upper short cylinder 15.The water outlet system of giving vent to anger comprises large mouth taper gas skirt 16 down, taper gas skirt 16 is communicated with atmosphere by gas cylinder 18, expose from upper short cylinder 15 upsides the upper end of gas cylinder 18, gas cylinder 18 is fixed in upper short cylinder 15 by annular overflow weir 17, and annular overflow weir 17 tops are provided with rising pipe 20.In gas cylinder 18, be provided with wire mesh demister 19, its height in gas cylinder 18 accounts for 1/5～1/4 of gas cylinder 18 height, can bury in oblivion the foam that aeration process is taken out of.
The aspect ratio of water distribution section I, conversion zone II, segregation section III is 1.0: (3.5～5.5): 1.5; Lower short cylinder 3, upper short cylinder 15 are identical with the diameter D of long cylinder 8, and aspect ratio is 5.5～7.0.
The utility model can adopt PVC plate or steel plate to make, and its working process is as follows:
Between upper screen cloth 21, lower screen cloth 5, be filled with a certain amount of filler, microorganism is attached on filler with biomembranous form.Nitrogenous organic waste water enters water distributor 26 water distribution uniformities by water inlet pipe 2, after by interior the produced micro-bubble of microporous aeration disc 25, brought in the mixing zone 6 of conversion zone II, in mixing zone, 6 interior waste water and left circulation tube 11, right circulation tube 23 backflow mixed liquor mix, then under the drive of upstream, enter multistage Venturi tube 10.The symmetrical vortex of the interior existence of multistage Venturi tube 10 flow field, gas-liquid-solid three-phase, in the interior abundant contact of multistage Venturi tube 10, obtains good mass transfer effect, in multistage Venturi tube 10, is aerobic zone, and there is the denitrification step in biological denitrification process in this district, by NH
3-N is converted into NO
3 -, mixed solution enters shunting zone 13 afterwards, and partially liq enters segregation section III, partially liq and all microbial film particles enter left circulation tube 11, right circulation tube 23 reflux cycle, in left circulation tube 11, right circulation tube 23, be oxygen-starved area, the denitrification step in biological denitrification process occur, by NO
3 -be converted into N
2, taper gas skirt 16 is collected most of gas (comprising the nitrogen that air and denitrification produce), and gas is by gas cylinder 18 loss to air, and the waste water after processing is discharged by annular overflow weir 17 and rising pipe 20.Gas cylinder 18 liquid levels produce a large amount of foams, by wire mesh demister 19 physics foam removals.So far, complete the whole process of reaction.Through the examination of laboratory simulation influent waste water fortune, under normal temperature, its volumetric loading can reach 8.5kgCOD/m
3d, total nitrogen volumetric loading is 0.56kg/m
3d.
Claims (12)
1. an external loop airlift vortex enhanced biological nitrogen removal reactor, it is characterized in that, comprise water distribution section (I) from bottom to up, conversion zone (II) and segregation section (III), described water distribution section (I) comprises the lower short cylinder (3) of being located on base plate (1), the lowest part in lower short cylinder (3) outside is provided with and empties mouthful (28), in lower short cylinder (3), be provided with water distributor (26), microporous aeration disc (25), water distributor (26) is communicated with the water inlet pipe (2) of being located at lower short cylinder (3) outside, microporous aeration disc (25) is communicated with the inlet pipe (27) of being located at lower short cylinder (3) outside, described conversion zone (II) comprises long cylinder (8), in long cylinder (8), be provided with multistage Venturi tube (10), the two ends up and down of multistage Venturi tube (10) and long cylinder (8) between two ports, form respectively up and down shunting zone (13), mixing zone (6), the left and right sides of shunting zone (13), mixing zone (6) is communicated with and is formed circulation by left circulation tube (11), right circulation tube (23) respectively, the two ends of multistage Venturi tube (10) are fixed in long cylinder (8) by upper annulus baffle plate (12), lower annulus baffle plate (24) respectively, described segregation section (III) comprises short cylinder (15), is provided with the water outlet system of giving vent to anger in upper short cylinder (15).
2. external loop airlift vortex enhanced biological nitrogen removal reactor as claimed in claim 1, it is characterized in that, described microporous aeration disc (25) is located in same level with inlet pipe (27), water inlet pipe (2) is located in same level with water distributor (26), and microporous aeration disc (25), inlet pipe (27) are higher than water inlet pipe (2), water distributor (26) layout, and water inlet pipe (2), water distributor (26) are arranged higher than emptying mouthful (28).
3. external loop airlift vortex enhanced biological nitrogen removal reactor as claimed in claim 1, it is characterized in that, the lower end of described long cylinder (8) is connected with lower short cylinder (3) by lower flange (4), and upper end is connected with upper short cylinder (15) by upper flange (14).
4. external loop airlift vortex enhanced biological nitrogen removal reactor as claimed in claim 3, is characterized in that, is provided with lower screen cloth (5) in described lower flange (4), is provided with upper screen cloth (21) in upper flange (14).
5. external loop airlift vortex enhanced biological nitrogen removal reactor as claimed in claim 1, it is characterized in that, the described water outlet system of giving vent to anger comprises large mouth taper gas skirt (16) down, taper gas skirt (16) is communicated with atmosphere by gas cylinder (18), expose from upper short cylinder (15) upside the upper end of gas cylinder (18), gas cylinder (18) is fixed in upper short cylinder (15) by annular overflow weir (17), and annular overflow weir (17) top is provided with rising pipe (20).
6. external loop airlift vortex enhanced biological nitrogen removal reactor as claimed in claim 5, it is characterized in that, in described gas cylinder (18), be provided with wire mesh demister (19), its height in gas cylinder (18) accounts for 1/5～1/4 of gas cylinder (18) height, can bury in oblivion the foam that aeration process is taken out of.
7. external loop airlift vortex enhanced biological nitrogen removal reactor as claimed in claim 1, is characterized in that, the aspect ratio of described water distribution section (I), conversion zone (II), segregation section (III) is 1.0: (3.5～5.5): 1.5; Lower short cylinder (3), upper short cylinder (15) are identical with the diameter (D) of long cylinder (8), and aspect ratio is 5.5～7.0.
8. external loop airlift vortex enhanced biological nitrogen removal reactor as claimed in claim 1, is characterized in that, described mixing zone (6) highly account for 1/8～1/7 of long cylinder (8) height.
9. external loop airlift vortex enhanced biological nitrogen removal reactor as claimed in claim 1, it is characterized in that, described multistage Venturi tube (10) is connected to form successively by half Venturi tube and two middle identical Venturi tubes of specification at two ends, between the barrel of half and half Venturi tube, each Venturi tube and long cylinder (8), form respectively independently heat preservation zone (9), the lower of heat preservation zone (9) one sides is provided with insulation water inlet (7), and the higher position of opposite side is provided with insulation water out (22).
10. the external loop airlift vortex enhanced biological nitrogen removal reactor as described in claim 1 or 9, it is characterized in that, the height of described multistage Venturi tube (10) accounts for 5/7～3/4 of long cylinder (8) height, and its minimum diameter (d1) is (0.4～0.6) with the ratio of long cylinder (8) diameter (D): 1; In multistage Venturi tube (10), the bus of single Venturi tube and the angle between horizontal plane (β) are 50 °～70 °.
11. external loop airlift vortex enhanced biological nitrogen removal reactors as claimed in claim 1, is characterized in that, described shunting zone (13) highly account for 1/8～1/7 of long cylinder (8) height.
12. external loop airlift vortex enhanced biological nitrogen removal reactors as claimed in claim 1, it is characterized in that, described left circulation tube (11), right circulation tube (23) are symmetrical tri linear shape, knuckle (α) is 100 °～120 °, and its diameter (d2) is 0.45～0.65: 1 with the ratio of long cylinder (8) diameter (D).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420373170.XU CN203999136U (en) | 2014-07-07 | 2014-07-07 | External loop airlift vortex enhanced biological nitrogen removal reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420373170.XU CN203999136U (en) | 2014-07-07 | 2014-07-07 | External loop airlift vortex enhanced biological nitrogen removal reactor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085986A (en) * | 2014-07-07 | 2014-10-08 | 东华大学 | Air-lifting type external-circulation vortex enhanced biological nitrogen-removal reactor |
| CN104495879A (en) * | 2015-01-12 | 2015-04-08 | 武汉大学 | Integrated contact oxidation/nitrogen and phosphorus removal-filtering separation bioreactor |
| CN104817231A (en) * | 2015-04-17 | 2015-08-05 | 南京元凯生物能源环保工程有限公司 | Aerobic organism primary wastewater treatment system |
| CN115536131A (en) * | 2022-08-02 | 2022-12-30 | 中国石油化工股份有限公司 | Up-flow multi-stage internal circulation low-oxygen aeration bioreactor |
-
2014
- 2014-07-07 CN CN201420373170.XU patent/CN203999136U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085986A (en) * | 2014-07-07 | 2014-10-08 | 东华大学 | Air-lifting type external-circulation vortex enhanced biological nitrogen-removal reactor |
| CN104085986B (en) * | 2014-07-07 | 2016-03-30 | 东华大学 | A kind of external loop airlift vortex enhanced biological nitrogen removal reactor |
| CN104495879A (en) * | 2015-01-12 | 2015-04-08 | 武汉大学 | Integrated contact oxidation/nitrogen and phosphorus removal-filtering separation bioreactor |
| CN104817231A (en) * | 2015-04-17 | 2015-08-05 | 南京元凯生物能源环保工程有限公司 | Aerobic organism primary wastewater treatment system |
| CN115536131A (en) * | 2022-08-02 | 2022-12-30 | 中国石油化工股份有限公司 | Up-flow multi-stage internal circulation low-oxygen aeration bioreactor |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20141210 Effective date of abandoning: 20160330 |
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