CN106064849B - Double-nozzle jet aeration device and aeration method thereof - Google Patents
Double-nozzle jet aeration device and aeration method thereof Download PDFInfo
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- CN106064849B CN106064849B CN201610541259.6A CN201610541259A CN106064849B CN 106064849 B CN106064849 B CN 106064849B CN 201610541259 A CN201610541259 A CN 201610541259A CN 106064849 B CN106064849 B CN 106064849B
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- 238000005273 aeration Methods 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005520 cutting process Methods 0.000 claims abstract description 81
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000001301 oxygen Substances 0.000 claims abstract description 30
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 30
- 239000010865 sewage Substances 0.000 claims abstract description 26
- 239000012530 fluid Substances 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 230000001174 ascending effect Effects 0.000 claims abstract description 5
- 235000001674 Agaricus brunnescens Nutrition 0.000 claims description 67
- 230000009977 dual effect Effects 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 12
- 238000003475 lamination Methods 0.000 claims description 6
- 239000002173 cutting fluid Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000011148 porous material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000006213 oxygenation reaction Methods 0.000 description 2
- 238000005276 aerator Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
An aeration device comprises an outer cylinder, a cover, a base and a bubble cutting device capable of sufficiently cutting bubbles. The inside of the base is provided with two nozzle structures which are 180 degrees and symmetrically distributed and can form spiral ascending fluid, and the spiral ascending fluid is subjected to full mixing cutting through the bubble cutting device. According to the invention, the oxygen content in the sewage can be rapidly and effectively increased, so that the air bubbles in the sewage pool are more uniformly distributed, a vertical spiral circulation is formed to rise, and the internal cutting module is used for stirring and mixing the fluid more fully and uniformly to obtain more uniform and smaller air bubbles; the outflow scattering angle of the fluid is increased, the reaction contact area is increased, and the oxygen utilization rate is ensured. The aeration device has small bubbles, high oxygen utilization rate and high power efficiency, and can ensure stable and high-efficiency operation of the sewage treatment process.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a double-nozzle jet aeration device and an aeration method thereof, wherein the double-nozzle jet aeration device and the aeration method thereof can form spiral ascending fluid, and the double-nozzle jet aeration device is an aeration device with good working stability, high power efficiency, large dissolved oxygen and no blockage.
Background
Aeration refers to the process of forcing a gas into a liquid, the purpose of which is to obtain a sufficient amount of dissolved oxygen. In the biochemical treatment process of industrial sewage and urban domestic sewage of textile, printing and dyeing, papermaking, chemical industry and the like, the biochemical sewage treatment needs dissolved oxygen, and an aeration device is a necessary device for realizing aeration and providing the dissolved oxygen. At present, aeration devices at home and abroad are various, but basically generate large bubbles of more than 50 microns. And the larger the bubbles, the smaller the specific surface area, the lower the gas utilization rate, and the higher the aeration cost. At present, the technology of micro-pore diffusion method is adopted for generating fine bubbles in China, and smaller bubbles are generated when air is discharged into water body through micro-pores, but the micro-pore diffusion method has the defects that:
1. the resistance is overlarge in the aeration process;
2. the pores are easy to be blocked; 3.
the method has insufficient durability and reliability of the aeration device.
Disclosure of Invention
Aiming at the problems and the actual demands of the prior art, the invention aims to provide a double-nozzle jet aeration device and an aeration method thereof, wherein the double-nozzle jet aeration device and the aeration method thereof can form spiral line ascending fluid, and the double-nozzle jet aeration device is an aeration device with good working stability, high power efficiency, large dissolved oxygen and no blockage.
In order to solve the problems, the technical scheme of the double-nozzle jet aeration device is as follows:
an aeration device is used for cutting bubbles and generating small bubbles in the aeration process during biochemical treatment of sewage and comprises a cover 1, an outer cylinder 2, a base 4, an air inlet pipeline and a nozzle which are arranged on the base 4, and is characterized in that,
a bubble cutting device 3 for cutting bubbles is coaxially arranged in the outer cylinder 2,
the bubble cutting device 3 is cylindrical, and includes: a large mushroom head shaped cutting assembly 301 and a small mushroom head shaped cutting assembly 302 for cutting fluid, reducing drag along the way during fluid up cutting;
the big mushroom head-shaped cutting assembly 301 is in a circular ring shape with inner and outer cylindrical surfaces, the inner cylindrical surface of the big mushroom head-shaped cutting assembly is provided with a big mushroom head-shaped protruding structure 3012 for cutting bubbles, the small mushroom head-shaped cutting assembly 302 is in a circular ring shape with inner and outer cylindrical surfaces, and the inner cylindrical surface of the small mushroom head-shaped cutting assembly is provided with a small mushroom head-shaped protruding structure 3022 for cutting bubbles, which protrudes inwards in the radial direction.
The double-nozzle jet aeration device is characterized in that,
the big mushroom head-shaped raised structures 3012 arranged on the inner cylindrical surface of the big mushroom head-shaped cutting assembly 301 and the small mushroom head-shaped raised structures 3022 arranged on the inner cylindrical surface of the small mushroom head-shaped cutting assembly 302 and used for cutting bubbles are respectively selected from polyhedral structures with edges and corners, and the size of the small mushroom head-shaped raised structures 3022 is smaller than that of the big mushroom head-shaped raised structures 3012.
The double-nozzle jet aeration device is characterized in that,
the polyhedral structure with the edges and corners is selected from a cylinder, a cone and a sphere.
The double-nozzle jet aeration device is characterized in that,
the big mushroom head-shaped raised structures 3012 arranged on the inner cylindrical surface of the big mushroom head-shaped cutting assembly 301 and the small mushroom head-shaped raised structures 3022 arranged on the inner cylindrical surface of the small mushroom head-shaped cutting assembly 302 and used for cutting bubbles are respectively selected from cylindrical, conical or spherical structures with edges and corners, and the size of the small mushroom head-shaped raised structures 3022 is smaller than that of the big mushroom head-shaped raised structures 3012.
The double-nozzle jet aeration device is characterized in that,
the small mushroom head shaped cutting assembly is connected in series with 2-4 small mushroom head shaped raised structures 3022.
The double-nozzle jet aeration device is characterized in that,
small mushroom head-shaped cutting assembly 302 the outer cylindrical surface of the large mushroom head-shaped cutting assembly 301 is provided with a protruding structure 3011 for contact fit with the outer cylinder groove 202;
the outer cylindrical surface of the small mushroom head serial cutting device 302 is provided with a protruding structure 3021 for being in contact fit with the outer cylinder groove 202.
The double-nozzle jet aeration device is characterized in that,
the big mushroom head-shaped cutting assembly 301 and the small mushroom head-shaped cutting assembly 302 which are connected in series are horizontally arranged in a staggered mode, and the total number of layers of the staggered lamination is 6-10.
The double-nozzle jet aeration device is characterized in that,
the base is a hollow cone with a small diameter and a large diameter at the upper part, the upper opening is communicated with the bubble cutting device 3, two nozzles are symmetrically arranged at the lower part of the base at 180 degrees, and the two nozzles are communicated with an air inlet pipeline arranged at the lower part of the base 4 and are connected with a blown air source.
The double-nozzle jet aeration device is characterized in that,
the hollow base inner surface 402 is a tapered caliber structure designed according to a streamline shape, and the axes of the outlet ends of the two nozzles of the base are upward tangent with the base inner surface 402 at an angle of 15-60 degrees with the horizontal plane.
The double-nozzle jet aeration device is characterized in that,
the diameters of the two nozzles of the base are gradually reduced to increase the gas outflow speed, the inner diameter of the outlet is 14-18mm, and the diameter of the inlet close to the inlet end of the gas inlet pipeline is 20-24mm.
The diameter reducing size of the two nozzles of the base is selected according to the air inflow of the air source, and preferably, the inner diameter of the outlet is 16mm, and the diameter of the inlet close to the air inlet pipeline end is about 22 mm.
In addition, according to the dual nozzle jet aeration device of the present invention, preferably, the lower part of the hollow cone base is provided with a supporting device 5, the supporting device 5 comprises a conical supporting connection structure 407, and the axial line of the supporting connection structure 407 coincides with the axial line of the base.
According to a dual nozzle jet aeration device of the present invention, it is preferable that the lower end cylindrical surface of the support connection structure has a standard screw structure for connection.
According to a dual nozzle jet aeration device of the present invention, preferably, the base flange 405 is used for connecting with a gas source, the inner surface of the flange is provided with an internal thread of an external threaded pipe, and the flange can be connected with the gas source through a flange structure or a threaded pipe.
According to a dual nozzle jet aeration device of the present invention, preferably,
in order to fix the air inlet pipeline at the lower part of the hollow cone base, a beam structure perpendicular to the air inlet pipeline is arranged. The air inlet pipe 406 of the base is fixed with the cylindrical structure at the lower end of the base through two beams, and the cross section of the beams is square or cylindrical.
According to a dual nozzle jet aeration device of the present invention, preferably,
the outer cylinder 2 is connected to the cylindrical structure at the upper end of the base through threads.
According to a dual nozzle jet aeration device of the present invention, preferably,
the lower end of the supporting device 5 is provided with a gradual expansion caliber structure for ensuring stability.
According to a dual nozzle jet aeration device of the present invention, preferably,
the outer cylinder 2 is in threaded connection with the upper end of the base 4, a fixed hanging ring structure 203 is arranged on the outer wall surface of the outer cylinder, the cover 1 is in threaded connection with the outlet end 201 of the outer cylinder, and a fixed hanging ring structure is also arranged on the outer wall surface of the cover.
The two hanging ring structures are used for connecting and fixing the aeration device with the bottom of the pool by using ropes, and the other hanging ring structure is fixedly connected with an air source air inlet pipe extending into the pool, so that the aerator is prevented from shaking.
The invention also provides a double-nozzle jet aeration method which is characterized in that,
a double-nozzle jet aeration method is used for cutting bubbles and generating small bubbles in the aeration process during biochemical treatment of sewage, and is characterized in that the bubble cutting device 3 is used,
the blower device 11 is opened, air source air enters the hollow base through the air inlet pipeline, upward forms an angle of 15-60 degrees with the horizontal plane from the outlet ends of the two nozzles of the base, is tangentially sprayed with the inner surface 402 of the base, spirally upward flows into the bubble cutting device 3,
at bubble cutting device 3, crisscross lamination level sets up big mushroom head form cutting element 301 and little mushroom head form cutting element 302 that concatenates are right, and to the fluid carry out abundant even stirring mix, cut the bubble, obtain more even little bubble, simultaneously, the fluid outflow scattering angle increases, has increased reaction area of contact, guarantees oxygen utilization ratio.
The double-nozzle jet aeration method is characterized in that,
the diameters of the two nozzles of the base are gradually reduced to increase the gas outflow speed, the inner diameter of the outlet is 14-18mm, and the diameter of the inlet close to the inlet end of the gas inlet pipeline is 20-24mm.
According to the invention, the spiral circulation scattering out at the outlet end of the outer cylinder can be observed, and the water tank is filled with small bubbles.
Meanwhile, the oxygen content change trend of the dissolved oxygen meter 7 is observed, after 2 minutes, the oxygen content in the water tank reaches 8.5mg/L, the reading of the barometer 10 is 61000Pa, and the actual gas quantity is 32m3/h after the flowmeter reads.
The change trend of the oxygen content in the sewage along with time is obtained through multiple tests, and after the data are calculated, the resistance loss of the aeration device is 1000Pa, the oxygenation capacity is 1.55kg/h, the oxygen utilization rate is 23%, and the theoretical power efficiency is 5.5 kg/kw.h.
According to the invention, the oxygen content in the sewage can be rapidly and effectively increased, so that the air bubbles in the sewage pool are more uniformly distributed, a vertical spiral circulation is formed to rise, and the internal cutting assembly sufficiently and uniformly stirs and mixes the fluid to obtain more uniform and smaller air bubbles. Meanwhile, the outflow scattering angle of the fluid is increased, the reaction contact area is increased, and the oxygen utilization rate is ensured.
The double-nozzle jet aeration method is characterized in that,
the big mushroom head-shaped raised structures 3012 arranged on the inner cylindrical surface of the big mushroom head-shaped cutting assembly 301 and the small mushroom head-shaped raised structures 3022 arranged on the inner cylindrical surface of the small mushroom head-shaped cutting assembly 302 and used for cutting bubbles are respectively selected from cylindrical, conical or spherical structures with edges and corners, and the size of the small mushroom head-shaped raised structures 3022 is smaller than that of the big mushroom head-shaped raised structures 3012.
The double-nozzle jet aeration method is characterized in that,
the small mushroom head shaped cutting assembly is connected in series with 2-4 small mushroom head shaped raised structures 3022.
The double-nozzle jet aeration method is characterized in that,
the big mushroom head-shaped cutting assembly 301 and the small mushroom head-shaped cutting assembly 302 which are connected in series are horizontally arranged in a staggered mode, and the total number of layers of the staggered lamination is 6-10.
The double-nozzle jet aeration method is characterized in that,
the base is a hollow cone with a small diameter and a large diameter at the upper part, the upper opening is communicated with the bubble cutting device 3, two nozzles are symmetrically arranged at the lower part of the base at 180 degrees, and the two nozzles are communicated with an air inlet pipeline arranged at the lower part of the base 4 and are connected with a blown air source.
According to the double-nozzle jet aeration method, the supporting device is in standard threaded connection with the base, and a user can select whether the middle is threaded to increase the supporting distance according to the requirement.
According to the double-nozzle jet aeration method, the air inlet of the air inlet pipeline is of a flange structure with standard threads on the inner surface, and a user can select to connect an air source through the flange or connect the air source through the threaded connection pipeline.
According to the double-nozzle jet aeration device and the method, the oxygen content in sewage can be quickly and effectively increased, so that bubbles in a sewage tank are distributed more uniformly, vertical spiral circulation is formed to rise, and an internal cutting assembly sufficiently and uniformly stirs and mixes fluid to obtain more uniform and smaller bubbles. Meanwhile, the outflow scattering angle of the fluid is increased, the reaction contact area is increased, and the oxygen utilization rate is ensured. The invention has high power efficiency and can ensure the stable and high-efficiency operation of the sewage treatment process.
Drawings
FIG. 1 is a schematic view of an aeration apparatus;
FIG. 2 is a schematic view of the base of the aeration device;
FIG. 3A is a perspective view of the outer cylinder of the aeration device according to the present invention;
FIG. 3B is a cross-sectional view of the outer cylinder of the aeration device of FIG. 3A according to the present invention;
FIG. 4 is a schematic structural view of a large mushroom head cutting device of the aeration device;
FIG. 5 is a schematic diagram of a small mushroom head serial cutting device of the aeration device;
fig. 6 is a schematic view illustrating an installation of the aeration device applied to the sewage tank.
In the figure, 1-cover; 2-an outer cylinder; 3-a bubble cutting device; 4, a base; 5-a supporting device; 6, a sewage pool; 7-an oxygen dissolving instrument; 8, an aeration device; 9-ball valve; 10-barometer; 11-a blower device; 12-a pipeline; 201-outer barrel outlet end threads; 202-an outer barrel groove; 203, an outer cylinder hanging ring; 204-thread at the inlet end of the outer cylinder; 301-a large mushroom head cutting device; 302-small mushroom head series connection cutting device; 401-nozzle 1;402—the inner surface of the base; 403-screw thread at the upper end of the base; 404-nozzle 2; 405-flange; 406-an air inlet pipeline; 407-support connection structure; 3011-the outer cylindrical surface of the big mushroom head is convex; 3012-a large mushroom head cutting structure; 3021-projecting the outer cylindrical surface of the small mushroom head; 3022-a small mushroom head tandem cutting structure;
Detailed Description
The invention will now be described in further detail with reference to the drawings and to specific examples.
Detection device embodiment:
the aeration device is arranged at the bottom of the sewage tank, and is assembled according to the schematic diagram shown in figure 1.
As shown in fig. 6, the aeration device 8 of the present embodiment is applied to the sewage tank 6, and the tank height is 6m.
When the air blowing device 11 is in a closed state, the ball valve 9 of the control valve is closed, and at the moment, the oxygen content in the water measured by the oxygen dissolving instrument 7 in the sewage tank 6 is zero, and the reading of the barometer 10 is 0Pa.
The blower 11 is turned on to start air charging, and it can be observed that the spiral circulation at the outlet end of the outer cylinder scatters out, and the water tank is filled with small bubbles.
Meanwhile, the oxygen content change trend of the dissolved oxygen meter 7 is observed, after 2 minutes, the oxygen content in the water tank reaches 8.5mg/L, the reading of the barometer 10 is 61000Pa, and the actual gas quantity is 32m3/h after the flowmeter reads.
The change trend of the oxygen content in the sewage along with time is obtained through multiple tests, and after the data are calculated, the resistance loss of the aeration device is 1000Pa, the oxygenation capacity is 1.55kg/h, the oxygen utilization rate is 23%, and the theoretical power efficiency is 5.5 kg/kw.h.
According to the invention, the oxygen content in the sewage can be rapidly and effectively increased, so that the air bubbles in the sewage pool are more uniformly distributed, a vertical spiral circulation is formed to rise, and the internal cutting assembly sufficiently and uniformly stirs and mixes the fluid to obtain more uniform and smaller air bubbles. Meanwhile, the outflow scattering angle of the fluid is increased, the reaction contact area is increased, and the oxygen utilization rate is ensured.
The aeration device has small bubbles, high oxygen utilization rate and high power efficiency, and can ensure the stable and high-efficiency operation of the sewage treatment process.
Claims (9)
1. The double-nozzle jet aeration device is used for cutting bubbles and generating small bubbles in the aeration process during biochemical treatment of sewage and comprises a cover (1), an outer cylinder (2), a base (4), and an air inlet pipeline and a nozzle which are arranged on the base (4),
a bubble cutting device (3) for cutting bubbles is coaxially arranged in the outer cylinder (2),
the bubble cutting device (3) is cylindrical, and comprises: a large mushroom head cutting assembly (301) and a small mushroom head cutting assembly (302) for cutting fluid and reducing resistance along the way during the fluid ascending cutting process;
the big mushroom head-shaped cutting assembly (301) is provided with an annular shape with inner and outer cylindrical surfaces, the inner cylindrical surface of the big mushroom head-shaped cutting assembly is provided with a big mushroom head-shaped protruding structure (3012) which is used for cutting bubbles and protrudes inwards in the radial direction, the small mushroom head-shaped cutting assembly (302) is provided with an annular shape with the inner and outer cylindrical surfaces, and the inner cylindrical surface of the small mushroom head-shaped cutting assembly is provided with a small mushroom head-shaped protruding structure (3022) which is used for cutting bubbles and protrudes inwards in the radial direction;
the base is a hollow cone with a small diameter and a large diameter at the upper part, the upper opening is communicated with the bubble cutting device (3), two nozzles are symmetrically arranged at the lower part of the base at 180 degrees, and the two nozzles are communicated with an air inlet pipeline arranged at the lower part of the base (4) and connected with a blown air source.
2. A dual nozzle jet aeration device as claimed in claim 1 wherein,
the big mushroom head-shaped raised structures (3012) which are arranged on the inner cylindrical surface of the big mushroom head-shaped cutting assembly (301) and used for cutting bubbles are respectively selected from polyhedral structures with edges and corners, and the size of each small mushroom head-shaped raised structure (3022) is smaller than that of each big mushroom head-shaped raised structure (3012).
3. A dual nozzle jet aeration device as claimed in claim 2 wherein,
the polyhedral structure with the edges and corners is selected from a cylinder, a cone and a sphere.
4. A dual nozzle jet aeration device as claimed in claim 1 wherein,
the small mushroom head shaped cutting assembly is connected with 2-4 small mushroom head shaped protruding structures (3022) in series.
5. A dual nozzle jet aeration device as claimed in claim 1 wherein,
the outer cylindrical surface of the big mushroom head-shaped cutting assembly (301) is provided with a protruding structure for being in contact fit with the outer cylinder groove (202);
the outer cylindrical surface of the small mushroom head-shaped cutting assembly (302) is provided with a protruding structure for being in contact fit with the outer cylinder groove (202).
6. A dual nozzle jet aeration device as claimed in claim 1 wherein,
the big mushroom head-shaped cutting assembly (301) and the small mushroom head-shaped cutting assembly (302) which are connected in series are horizontally arranged in a staggered lamination mode, and the total number of layers of the staggered lamination is 6-10.
7. A dual nozzle jet aeration device as claimed in claim 1 wherein,
the inner surface (402) of the hollow base is of a tapered caliber structure designed according to a streamline shape, and the axes of the outlet ends of the two nozzles of the base are upwards tangent to the inner surface (402) of the base at an angle of 15-60 degrees with the horizontal plane.
8. A dual nozzle jet aeration device as claimed in claim 1 wherein,
the diameters of the two nozzles of the base are gradually reduced to increase the gas outflow speed, the inner diameter of the outlet is 14-18mm, and the diameter of the inlet close to the inlet end of the gas inlet pipeline is 20-24mm.
9. A double-nozzle jet aeration method is characterized in that,
a double-nozzle jet aeration method is used for cutting bubbles and generating small bubbles in the aeration process during biochemical treatment of sewage, and is characterized in that a bubble cutting device (3) is used,
opening a blast device (11), enabling air source air to enter the hollow base through an air inlet pipeline, enabling the air source air to upwards form an angle of 15-60 degrees with a horizontal plane from the outlet ends of two nozzles of the base, tangentially spraying the air source air with the inner surface (402) of the base, enabling the air source air to upwards flow into the bubble cutting device (3) in a spiral mode,
at bubble cutting device (3), big mushroom head form cutting element (301) and little mushroom head form cutting element (302) of concatenating that the level of staggered lamination set up, when carrying out abundant even stirring and mixing to the fluid, cut the bubble, obtain more even little bubble, simultaneously, the fluid outflow scattering angle increases, increases reaction area of contact, guarantees oxygen utilization ratio.
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| CN112520895B (en) * | 2020-12-03 | 2022-12-27 | 北京京润环保科技股份有限公司 | Gasification grey water aeration hardness removal device and treatment method and application thereof |
| CN113998790A (en) * | 2021-10-25 | 2022-02-01 | 吉林大学 | Submersible aerator and control method thereof |
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