CN112678956A - Oxygen deficiency-good oxygen MBBR integrated device based on electric drive rotary aeration - Google Patents
Oxygen deficiency-good oxygen MBBR integrated device based on electric drive rotary aeration Download PDFInfo
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- CN112678956A CN112678956A CN202011545328.3A CN202011545328A CN112678956A CN 112678956 A CN112678956 A CN 112678956A CN 202011545328 A CN202011545328 A CN 202011545328A CN 112678956 A CN112678956 A CN 112678956A
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- 238000005273 aeration Methods 0.000 title claims abstract description 42
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims description 10
- 239000001301 oxygen Substances 0.000 title claims description 10
- 229910052760 oxygen Inorganic materials 0.000 title claims description 10
- 206010021143 Hypoxia Diseases 0.000 title claims description 3
- AHEWZZJEDQVLOP-UHFFFAOYSA-N monobromobimane Chemical compound BrCC1=C(C)C(=O)N2N1C(C)=C(C)C2=O AHEWZZJEDQVLOP-UHFFFAOYSA-N 0.000 title claims 10
- 239000000945 filler Substances 0.000 claims abstract description 28
- 238000005452 bending Methods 0.000 claims description 5
- 239000010802 sludge Substances 0.000 abstract description 15
- 238000005243 fluidization Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 30
- 239000010865 sewage Substances 0.000 description 28
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910052698 phosphorus Inorganic materials 0.000 description 5
- 239000011574 phosphorus Substances 0.000 description 5
- 238000010992 reflux Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
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Abstract
The invention provides an anoxic-aerobic MBBR (moving bed biofilm reactor) integrated device based on electrically-driven rotary aeration, which comprises a shell, a middle cylinder and an inner cylinder, wherein a bearing support is arranged at the top end of the middle cylinder; the bearing support is provided with a speed reduction motor. The invention can realize the uniform aeration of the aerobic zone and the good fluidization of the filler, and the gravity backflow of the sludge and the mixed liquid to the anoxic zone. Filling inclined plate filler in the settling zone to stabilize the effluent quality.
Description
Technical Field
The invention relates to the technical field of biological sewage treatment, in particular to an anoxic-aerobic MBBR (moving bed biofilm reactor) integrated device based on electrically-driven rotary aeration.
Background
At present, in the practice of decentralized sewage treatment in rural residences, farmhouse workers and the like, a sewage treatment station or treatment equipment of the sewage treatment station or the treatment equipment is usually reduced from a municipal sewage plant, and the use amount of equipment such as a water inlet pump, an adjusting pump, a reflux pump, a blower, a dosing pump, a flowmeter and the like is large. The method not only increases the construction and operation cost, but also puts higher requirements on operation management and protection. How to simplify the equipment configuration and have good treatment effect is a problem to be solved by distributed sewage treatment.
The domestic sewage of rural residences, farmhouse happiness and the like has large water quantity and water quality fluctuation and has higher requirement on the impact load resistance of the treatment process. The biomembrane process has rich biological phase and great biomass, and thus has excellent adaptability to the fluctuation of water quality and water quantity. Moving Bed Biofilm Reactors (MBBR) are increasingly widely used due to the advantages of being not easy to block, large in biomass and the like.
Fluidization of the filler in the MBBR is a key link. The aeration tank of a sewage treatment plant (station) adopting the MBBR technology often has the phenomenon of local filler accumulation caused by uneven air inlet distribution in the whole tank, and the treatment effect is influenced. The problem is caused by that the aeration of the reactor is usually carried out by perforated pipe aeration, the perforated pipes of the aeration tank are fixedly arranged, the distance between the parallel perforated pipes, the horizontal degree of the arranged perforated pipes are not enough, and the pipeline of the aeration system is blocked, so that the aeration is not uniform on the plane. In order to solve this problem, it is common to increase the installation density of the aeration apparatus, and even to specially provide a stirrer. In a small-sized sewage treatment facility using a moving bed biofilm reactor, since the number of perforated pipes is small, the packing accumulation due to non-uniform aeration is more serious. Another problem is that sludge may be accumulated in the aeration tank for medium and small sewage treatment, which is a result of uneven aeration.
In order to realize good denitrification, an anoxic unit is usually arranged in the biological treatment process of the domestic sewage and is arranged in front of an aerobic aeration unit; a reflux pump is needed to be arranged for refluxing the mixed liquid discharged from the aerobic unit, and a reflux pump is needed to be arranged for refluxing part of sludge in the sedimentation tank.
Disclosure of Invention
The invention provides an anoxic-aerobic MBBR (moving bed biofilm reactor) integrated device based on electrically-driven rotary aeration, which solves the problems of poor aeration effect and low treatment efficiency of the conventional device.
The technical scheme for realizing the invention is as follows:
an anoxic-aerobic MBBR integrated device based on electrically-driven rotary aeration comprises a shell, a middle barrel and an inner barrel, wherein a bearing support is arranged at the top end of the middle barrel, a rotating shaft is arranged at the center of the bottom of the inner barrel, an air vertical pipe is arranged above the rotating shaft, an air inlet pipe is arranged at the upper end of the air vertical pipe, a rotary horizontal pipe is arranged on the air vertical pipe, and an aeration hole is formed in the rotary horizontal pipe; the bearing support is provided with a speed reduction motor.
The shell is provided with an upper shell barrel and a lower shell barrel, the upper shell barrel is connected with the lower shell barrel through an inclined connecting section, and the diameter of the upper shell barrel is larger than that of the lower shell barrel.
The lower end of the middle cylinder and the lower cylinder of the shell are arranged in a vertically corresponding mode, and the inner diameter of the middle cylinder is the same as that of the lower cylinder of the shell.
The distance between the lower end of the middle cylinder and the top end of the lower cylinder of the outer shell is 50-500 mm, and the top of the middle cylinder is 200-500mm higher than that of the inner cylinder.
The bearing support center is equipped with area seat bearing I, and the air riser passes area seat bearing I setting, and the air riser passes through rotary joint and links to each other with the intake pipe. Wherein the air inlet pipe is fixedly connected with an upper connector of the rotary joint, the air vertical pipe is movably connected with a lower connector of the rotary joint, and the air vertical pipe is superposed with a central shaft of the rotary joint.
The air vertical pipe is provided with an air vertical pipe fixing rotating part, and the air vertical pipe fixing rotating part is connected with the speed reducing motor through a connecting accessory.
And a filler is arranged above the inner cylinder and is arranged above the transverse rotating pipe.
The aeration hole upwards sets up, and the pivot is located the rotatory horizontal pipe below, and the pivot is connected with the bottom bearing that sets up including the bobbin base portion, is equipped with the screw in the pivot.
The distance between the bottom end of the inner cylinder and the bottom of the shell is 100-500 mm.
A pipeline is arranged between the middle cylinder and the inner cylinder, a bending section is arranged at the bottom of the pipeline, and the bending section is located at the bottom of the inner cylinder.
The invention has the beneficial effects that: the invention adopts an electrically-driven rotary aeration, concentric cylinder design and a vertical partition anoxic-aerobic moving bed biofilm reactor, and particularly utilizes the electrically-driven rotary aeration to promote uniform gas distribution, promote uniform fluidization of fillers, prevent the phenomena of filler accumulation or dead balls and the like, and drive a bottom propeller to rotate to prevent sludge sedimentation. The invention adopts concentric cylinder design and vertical partition design, and realizes the backflow of sludge and mixed liquid to the anoxic section on the premise of not arranging a backflow pump. Therefore, the invention can realize the uniform aeration of the aerobic zone and the good fluidization of the filler, and the gravity backflow of the sludge and the mixed liquid to the anoxic zone. Filling inclined plate filler in the settling zone to stabilize the effluent quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
As shown in figure 1, the anoxic-aerobic MBBR integrated device based on electrically-driven rotary aeration comprises a shell 1, a middle cylinder 2 and an inner cylinder 3, wherein the inner cylinder 3 and the middle cylinder 2 are fixedly connected with the shell 1 in the modes of lacing wires and the like. The top end of the middle barrel 2 is provided with a bearing support 7, the center of the bottom of the inner barrel 3 is provided with a rotating shaft 12, an air vertical pipe 6 is arranged above the rotating shaft 12, the upper end of the air vertical pipe 6 is provided with an air inlet pipe 4, the air vertical pipe 6 is provided with a rotary transverse pipe 10, and the rotary transverse pipe 10 is provided with an aeration hole 10-1; the lower ends of the shell 1 and the middle cylinder 2 are provided with a gap 19, the height of the gap 19 is 50mm-500mm, a settling zone is arranged between the upper part of the shell 1 and the middle cylinder 2, an inclined plate filler 23 is fixedly arranged between the shell 1 and the middle cylinder 2, and the bearing support 7 is provided with a speed reduction motor 9.
The shell 1 is provided with an upper shell barrel 1-1 and a lower shell barrel 1-2, the upper shell barrel 1-1 is connected with the lower shell barrel 1-2 through an inclined connecting section 20, and the connecting section 20 at the upper part and the lower part of the upper shell barrel 1-1 descends along the centripetal direction to form the bottom of a sedimentation region between the upper shell barrel 1-1 and the middle shell barrel 2. The diameter of the upper cylinder 1-1 of the shell is larger than that of the lower cylinder 1-2 of the shell. The housing 1 is an open container with a thicker upper part and a thinner lower part. The bottom of the housing 1 is lowered in the centripetal direction with the lowest center. The top end of the shell 1 is consistent with the top end of the middle cylinder 2 in elevation; the lower end of the middle cylinder 2 is vertically and correspondingly arranged with the lower cylinder 1-2 of the outer shell, the inner diameter of the middle cylinder 2 is the same as that of the lower cylinder 1-2 of the outer shell, and the inner diameter of the inner cylinder 3 is smaller than that of the middle cylinder 2; a gap 15 exists between the inner cylinder 3 and the bottom of the shell 1, and the distance between the bottom end of the inner cylinder 3 and the bottom of the shell 1 is 100-500 mm.
Preferably, the central axes of the outer shell 1 and the middle cylinder 2 are coincided with the central axis of the inner cylinder 3, the inner diameter of the inner cylinder 3 is 300mm-5000mm, and the inner diameter of the middle cylinder 2 is 500mm-5500 mm; the inner diameter of the upper shell barrel 1-1 is 800mm-7000mm, the horizontal distance between the upper shell barrel 1-1 and the middle barrel 2 is 100mm-1500mm, and the horizontal distance between the inner barrel 3 and the lower part of the lower shell barrel 1-2 and the middle barrel 2 is 100mm-500 mm; the distance between the lower end of the middle cylinder 2 and the top end of the lower cylinder 1-2 of the outer shell is 50mm-500mm, the top of the middle cylinder 2 is 200 mm-500mm higher than the top of the inner cylinder 3, in order to ensure that the top of the inner cylinder 3 overflows uniformly, the top of the inner cylinder 3 is horizontal, and the top of the inner cylinder 3 can also be made into a tooth-shaped weir.
Preferably, the air inlet pipe 4 is connected and communicated with an air vertical pipe 6 through a rotary joint 5, a bearing support 7 is fixedly arranged at the top of the middle cylinder 2, and the air vertical pipe 6 is supported by a bearing with a seat 8 fixedly arranged on the bearing support 7. The air vertical pipe 6 is connected and communicated with the rotary transverse pipe 10, and the upper end of the rotating shaft 12 is fixedly connected with the rotary transverse pipe 10. The propeller 13 is fixedly mounted on the rotating shaft 12. The bottom end of the rotating shaft 12 is supported by a bottom bearing 14, and the centers of the rotating joint 5, the air vertical pipe 6 and the rotating shaft 12 are coaxial and coincide with the central axes of the shell 1, the middle cylinder 2 and the inner cylinder 3.
The speed-adjustable speed-reducing motor 9 is fixedly arranged on the bearing support 7, transmits power through a connecting fitting 21 and drives the air vertical pipe fixing rotating part 22 to rotate, the air vertical pipe 6 penetrates through the air vertical pipe fixing rotating part 22 and is fixedly connected with the air vertical pipe fixing rotating part 22, and the air vertical pipe 6 is driven to synchronously rotate by the rotation of the air vertical pipe fixing rotating part 22.
The working process of the reactor is as follows: raw water enters from a pipeline 16, outlet water flows out from a water outlet 17, and a certain amount of filler 18 is added into the inner barrel 3. Compressed air enters the air vertical pipe 6 from the air inlet pipe 4 through the rotary joint 5 and then enters the rotary transverse pipe 10. Compressed air flows out from aeration holes 10-1 on the transverse rotating pipe 10 to form continuous bubbles to float upwards. The reducing motor 9 outputs power to drive the air vertical pipe 6 to rotate. Because the lower half part of the rotary joint 5, the air vertical pipe 6, the rotary horizontal pipe 10, the fixed connecting piece 11, the shaft 12 and the propeller 13 are fixedly connected, when the air vertical pipe 6 rotates, the rotary horizontal pipe 10 and the propeller 13 are driven to rotate synchronously. The horizontal rotary pipe 10 rotates to make the continuously flowing air bubbles distributed in the space above the horizontal air pipe 10 in the inner cylinder 3, thereby forming rotary aeration. The horizontal rotating pipe 10 continuously rotates and simultaneously releases bubbles to contact with the filler 18 in the floating process, so that the filler 18 is stirred. Because the aeration can cover the whole packing layer, all the fillers are stirred, the phenomena of filler agglomeration, filler accumulation and 'dead balls' do not exist, and the aeration effect is good. The water above the horizontal rotating pipe 10 is in an aerobic state, and the water below the horizontal rotating pipe 10 to the bottom is in an anoxic state.
The raw water continuously flows in from the pipeline 16 and flows out from the outlet of the bending section 16-1 close to the center of the bottom of the shell 1. Due to the comprehensive effects of water inlet pressure, the rotating action of the propeller 13 and the inclined blades, steam stripping caused by bubbles escaping from the transverse rotating pipe 10 and the like, water in the inner barrel 3 continuously flows upwards from the bottom, overflows from the top of the inner barrel 3 and enters a gap between the inner barrel 3 and the middle barrel 2; part of water flows downwards to the bottom along the gap, enters the inner cylinder 3 from the gap 15 between the inner cylinder 3 and the bottom of the shell 1 and rises again; part of water overflowing from the inner cylinder 3 flows upwards along a gap 19 between the middle cylinder 2 and the lower cylinder 1-2 of the outer shell when passing through the gap, enters a settling zone, passes through the inclined plate filler 23, flows out of a supernatant from the water outlet 17, settles sludge, and flows back downwards along the gap 19 into the inner cylinder 3.
In the sewage treatment process, the inner cylinder 3 and the rotary transverse pipe 10 are in an aerobic state. In the process that water between the inner cylinder 3 and the middle cylinder 2 and between the lower parts of the outer shells 1 flows downwards, dissolved oxygen is continuously consumed, so that the content of the dissolved oxygen in the water and the sludge which return from the gaps 15 is low, and the lower part of the rotary transverse pipe 10 in the inner cylinder 3 is in an anoxic state. The integral reactor forms an anoxic-aerobic moving bed biomembrane process based on rotary aeration stirring.
The process has small sludge discharge amount, can intermittently discharge sludge, and when sludge is required to be discharged, the inflow of water from the pipeline 16 and the inflow of compressed air of the air inlet pipe 4 are suspended at the same time, and after sludge is settled, the bottom sludge is sucked out by the pipeline 16 in a suction mode.
The filler 18 is arranged above the inner barrel 3, the filler 18 is arranged above the transverse rotary pipe 10, in order to prevent the filler 18 from losing, a silk screen can be fixed at the top of the inner barrel 3 to intercept the filler 18, and the aperture of the silk screen is smaller than the diameter of the filler.
The number of the rotary transverse pipes 10 can be 1 or more, and more than 2 are beneficial to balance.
The diameters of the air inlet pipe 4, the rotary joint 5, the air vertical pipe 6 and the rotary transverse pipe 10 can be 5mm-500 mm.
Holes are formed in the pipe wall of the transverse rotating pipe 10, and the positions of the holes can be any positions on the pipe wall. The diameter of the holes may be 1mm to 20 mm.
In order to reduce the rotation resistance or prevent the sludge from settling, the cross section of the horizontal rotating pipe 10 can be made into a round shape, a streamline shape or other shapes; flow directing or wake fittings may also be added to the rotating cross tube 10.
The length of the blades of the propeller 13 is 50mm-2400mm, and the inclination direction of the blades is consistent with that of the inclined blades, so that the lower water and suspended sludge can be lifted upwards when the blades rotate.
Various modes of driving the air vertical pipe 6 to rotate by the speed-adjustable speed-reducing motor 9 exist, for example, the connecting fitting 21 is a combination of a coupler and a worm, the air vertical pipe fixing rotating part 22 is a worm wheel, the speed-adjustable speed-reducing motor 9 outputs power, the worm is driven to rotate through the coupler, the worm wheel is driven to rotate, and finally the air vertical pipe 6 is driven to rotate; or other modes such as belt drive and the like can realize that the speed-adjustable speed-reducing motor 9 drives the air vertical pipe 6 to rotate.
The device of the invention is used for treating domestic sewage, and the results are as follows:
(1) high concentration domestic sewage
The Chemical Oxygen Demand (COD) concentration of the sewage is 400-1200mg/L, the average inlet water concentration is 1041.59mg/L, the highest removal rate is 96.04%, the lowest removal rate is 81.35%, the average outlet water concentration is 114.05mg/L, and the average sewage removal rate is 89.05%. Looking at the whole trend, the effluent concentration continuously decreases along with the rising trend of the influent concentration. From the 9 th day to the 12 th day of the experiment, the Chemical Oxygen Demand (COD) concentration of the inlet sewage is increased from 978mg/L to 1200mg/L, but the outlet water of the sewage is stabilized below 100mg/L, and the removal rate of the Chemical Oxygen Demand (COD) is stabilized at 91%, which indicates that the fluidized state has certain capacity of resisting impact load of sewage.
The influent concentration of sewage ammonia nitrogen is 41.72-67.49mg/L, the average influent concentration is 58.21mg/L, the effluent ammonia nitrogen concentration is 5.52-12.87mg/L, and the average effluent concentration is 8.49 mg/L; the highest removal rate of the fluidized state to ammonia nitrogen is 91.82%, the lowest removal rate is 80.80%, and the average removal rate is 85.41%.
The total nitrogen inflow interval of the sewage is 62.31-76.50mg/L, the average inflow concentration is 71.04mg/L, the outflow concentration is 11.59-20.92mg/L, and the average outflow concentration is 16.91 mg/L. The removal rate of the total nitrogen by the packing in the fluidized state is up to 83.13 percent and the removal rate is as low as 71.16 percent, and the average removal rate is 76.20 percent.
The sewage total phosphorus inflow interval is 4.18-5.86 mg/L, the average inflow concentration is 5.12mg/L, the effluent concentration interval is 1.35-2.48 mg/L, and the average effluent concentration is 2.16 mg/L. The highest removal of total phosphorus by the filler in this state was 67.61%, the lowest removal was 45.24%, and the average removal was 57.81%. During the experiment, the influent concentration of the sewage fluctuates, but the effluent concentration is basically stable, which shows that the filler fluidization state has certain stability for the total phosphorus treatment.
(2) General domestic sewage
The Chemical Oxygen Demand (COD) concentration of the sewage is 200-350mg/L, the average inlet water concentration is 286.67mg/L, the outlet water concentration is within 45mg/L, and the average outlet water concentration is 41.06 mg/L. Wherein the removal rate of Chemical Oxygen Demand (COD) is 91.27% at most and 76.21% at least, and the average removal rate of sewage is 85.68%.
The influent concentration of the sewage ammonia nitrogen is 23.81-32.56mg/L, the average influent concentration is 28.25mg/L, the effluent ammonia nitrogen concentration is 3.42-4.74mg/L, and the average effluent concentration is 4.29 mg/L. The removal rate of the ammonia nitrogen in the fluidized state is 87.89 percent at most and 82.09 percent at least, and the average removal rate is 84.81 percent.
The total nitrogen water inlet interval is 30.76-39.70mg/L, the average water inlet concentration is 35.65mg/L, the water outlet concentration is 7.45-12.23mg/L, and the average water outlet concentration is 9.78 mg/L. The removal rate of the total nitrogen by the packing in a fluidized state is 80.34 percent at most and 65.24 percent at least, and the average removal rate is 72.57 percent.
The sewage total phosphorus inflow interval is 2.60-3.57 mg/L, the average inflow concentration is 3.24mg/L, the effluent concentration interval is 0.58-0.81mg/L, and the average effluent concentration is 0.77 mg/L. The highest removal of total phosphorus by the filler in this state was 80.75%, the lowest removal was 68.85%, and the average removal was 76.23%.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides an oxygen deficiency-good oxygen MBBR integrated device based on electric drive rotary aeration which characterized in that: the device comprises a shell (1), a middle barrel (2) and an inner barrel (3), wherein a bearing support (7) is arranged at the top end of the middle barrel (2), a rotating shaft (12) is arranged at the center of the bottom of the inner barrel (3), an air vertical pipe (6) is arranged above the rotating shaft (12), an air inlet pipe (4) is arranged at the upper end of the air vertical pipe (6), a rotary transverse pipe (10) is arranged on the air vertical pipe (6), and an aeration hole (10-1) is arranged on the rotary transverse pipe (10); the lower ends of the shell (1) and the middle cylinder (2) are provided with a gap (19), an inclined plate filler (23) is arranged between the shell (1) and the middle cylinder (2), and the bearing support (7) is provided with a speed reducing motor (9).
2. The anoxic-aerobic MBBR integrated device based on electrically driven rotary aeration according to claim 1, which is characterized in that: the shell (1) is provided with an upper shell barrel (1-1) and a lower shell barrel (1-2), the upper shell barrel (1-1) and the lower shell barrel (1-2) are connected through an inclined connecting section (20), and the diameter of the upper shell barrel (1-1) is larger than that of the lower shell barrel (1-2).
3. The anoxic-aerobic MBBR integrated device based on electrically driven rotary aeration according to claim 2, characterized in that: the lower end of the middle cylinder (2) is vertically and correspondingly arranged with the lower cylinder (1-2) of the shell, and the inner diameter of the middle cylinder (2) is the same as that of the lower cylinder (1-2) of the shell.
4. The anoxic-aerobic MBBR integrated device based on electrically driven rotary aeration according to claim 3, characterized in that: the distance between the lower end of the middle cylinder (2) and the top end of the lower cylinder (1-2) of the outer shell is 50-500 mm, and the top of the middle cylinder (2) is 200-500mm higher than that of the inner cylinder (3).
5. The anoxic-aerobic MBBR integrated device based on electrically driven rotary aeration according to claim 2, characterized in that: the bearing bracket (7) center is equipped with area seat bearing I (8), and air riser (6) pass area seat bearing I (8) and set up, and air riser (6) pass through rotary joint (5) and link to each other with intake pipe (4).
6. The anoxic-aerobic MBBR integrated device based on electrically driven rotary aeration according to claim 2, characterized in that: an air vertical pipe fixing rotating piece (22) is arranged on the air vertical pipe (6), and the air vertical pipe fixing rotating piece (22) is connected with the speed reducing motor (9) through a connecting fitting (11).
7. The anoxic-aerobic MBBR integrated device based on electrically driven rotary aeration according to claim 2, characterized in that: and a filler (18) is arranged above the inner cylinder (3), and the filler (18) is arranged above the transverse rotating pipe (10).
8. The anoxic-aerobic MBBR integrated device based on electrically driven rotary aeration according to claim 2, characterized in that: the aeration holes (23) are arranged upwards, the rotating shaft (12) is positioned below the transverse rotating pipe (10), the rotating shaft (12) is connected with a bottom bearing (14) arranged at the bottom of the inner barrel (3), and the rotating shaft (12) is provided with a propeller (13).
9. The anoxic-aerobic MBBR integrated device based on electrically driven rotary aeration according to claim 8, characterized in that: the distance between the bottom end of the inner cylinder (3) and the bottom of the shell (1) is 100-500 mm.
10. The apparatus of any one of claims 1-9, wherein: a pipeline (16) is arranged between the middle barrel (2) and the inner barrel (3), a bending section (16-1) is arranged at the bottom of the pipeline (16), and the bending section (16-1) is positioned at the bottom of the inner barrel (3).
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