CN117142671B - Submersible aerator - Google Patents
Submersible aerator Download PDFInfo
- Publication number
- CN117142671B CN117142671B CN202311349993.9A CN202311349993A CN117142671B CN 117142671 B CN117142671 B CN 117142671B CN 202311349993 A CN202311349993 A CN 202311349993A CN 117142671 B CN117142671 B CN 117142671B
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- CN
- China
- Prior art keywords
- cover plate
- aeration chamber
- water
- submersible
- aeration
- Prior art date
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- 238000005276 aerator Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 170
- 238000005273 aeration Methods 0.000 claims abstract description 126
- 239000007788 liquid Substances 0.000 claims description 108
- 238000009792 diffusion process Methods 0.000 claims description 48
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 29
- 239000001301 oxygen Substances 0.000 abstract description 29
- 229910052760 oxygen Inorganic materials 0.000 abstract description 29
- 230000000694 effects Effects 0.000 abstract description 23
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 18
- 239000011259 mixed solution Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 230000007423 decrease Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000003584 silencer Effects 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
-
- 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)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The invention provides a submersible aerator, which comprises a base, a submersible electric pump, an aeration chamber and an air inlet pipe from bottom to top, wherein the submersible electric pump is arranged on the base, and the bottom end of the air inlet pipe is positioned in the aeration chamber; the impeller is connected with the submerged electric pump and is positioned in the aeration chamber; the aeration chamber comprises an upper cover plate, a lower cover plate and a plurality of guide blades, and openings are formed in the centers of the upper cover plate and the lower cover plate; the upper cover plate and the lower cover plate are distributed at intervals up and down and are connected through a plurality of guide vane plates, and an aeration cavity with an upper opening, a lower opening and a circumferential opening is formed between the upper cover plate and the lower cover plate. The submersible aerator provided by the invention improves the dissolved oxygen of the water body and improves the aeration effect.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a submersible aerator.
Background
The submersible centrifugal aerator is widely applied to sewage treatment and aeration oxygenation of water bodies in rivers and lakes, and the impeller rotating at high speed forms negative pressure in the mixing disc, so that air on the water surface sequentially passes through the air inlet pipe and the air inlet disc and then enters the mixing disc to form steam-water mixed liquid, and the steam-water mixed liquid is sprayed out from the peripheral flow channels at high speed to oxygenate the water bodies. However, the existing submersible centrifugal aerator is subject to the following limitations: 1. the vapor-water mixed solution can not generate very small water drops and bubbles, and has poor dissolved oxygen effect. 2. The aerator is generally provided with 6 to 8 flow channels, a larger interval is arranged between adjacent flow channels, and the aeration effect between the flow channels is lower than that in the outlet direction of the flow channels. 3. After the vapor-water mixed liquid is sprayed out of the flow channel, the vapor-water mixed liquid moves upwards due to the small density of the vapor-water mixed liquid, and the oxygen dissolving effect of the sludge at the bottom of the tank is affected.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the diving aerator is provided, which improves the dissolved oxygen of the water body and improves the aeration effect.
In order to solve the technical problems, the embodiment of the invention provides a submersible aerator, which comprises a base, a submersible electric pump, an aeration chamber and an air inlet pipe from bottom to top, wherein the submersible electric pump is arranged on the base, and the bottom end of the air inlet pipe is positioned in the aeration chamber; the impeller is connected with the submerged electric pump and is positioned in the aeration chamber; the aeration chamber comprises an upper cover plate, a lower cover plate and a plurality of guide blades, and openings are formed in the centers of the upper cover plate and the lower cover plate; the upper cover plate and the lower cover plate are distributed at intervals up and down and are connected through a plurality of guide vane plates, and an aeration cavity with a water inlet positioned at the top end and a liquid outlet positioned around the circumference is formed between the upper cover plate and the lower cover plate.
As a further improvement of the embodiment of the invention, a plurality of guide vanes are uniformly arranged between the upper cover plate and the lower cover plate at intervals along the circumferential direction of the impeller, and each guide vane is parallel to the tangent line of the impeller.
As a further improvement of the embodiment of the invention, the two side surfaces of the guide blade plate are provided with first cutting grooves which are vertically distributed.
As a further improvement of the embodiment of the invention, the aeration chamber further comprises an annular adjusting ring, and the adjusting ring is arranged outside the guide vane plate; the upper end face of the adjusting ring extends upwards from inside to outside, and the lower end face of the adjusting ring extends downwards from inside to outside.
As a further improvement of the embodiment of the invention, the included angle alpha between the upper end surface of the adjusting ring and the horizontal plane is 1-5 degrees, and the included angle beta between the lower end surface of the adjusting ring and the horizontal plane is 1-5 degrees.
As a further improvement of the embodiment of the invention, the upper end face and the lower end face of the adjusting ring are respectively provided with a second cutting groove which is distributed in an annular mode.
As a further improvement of the embodiment of the invention, the impeller comprises a hub and first blades, wherein the hub is cylindrical, and the first blades are arranged at the top end of the hub; the center of the bottom end of the hub is provided with a shaft hole for connecting with a motor shaft of the submerged motor pump, and the center of the top end of the hub is provided with a gas storage groove; the shaft hole is communicated with the air storage groove, and a motor shaft of the submerged electric pump penetrates through the shaft hole and stretches into the air storage groove to be connected with a second blade positioned in the air storage groove; the hub is internally provided with a diffusion flow passage, an inlet of the diffusion flow passage is communicated with the gas storage groove, and an outlet of the diffusion flow passage is positioned on the outer wall of the hub and is communicated with the aeration chamber.
As a further improvement of the embodiment of the invention, the lower part of the air inlet pipe is positioned in the air storage groove, the air inlet pipe and the air storage groove are coaxially arranged, and the difference between the outer diameter of the air inlet pipe and the inner diameter of the air storage groove is 4-16 mm.
As a further improvement of the embodiment of the invention, the diffusion flow passage is a conical through hole, and the axis of the diffusion flow passage is parallel to the horizontal line; the inlet of the diffusion flow passage is larger than the outlet; 3-6 diffusion channels are uniformly distributed on the same cross section of the hub; the diameter of the outlet of the diffusion flow passage is 5-30 mm, and the taper of the diffusion flow passage is 1:3-1:8.
As a further improvement of the embodiment of the invention, the pipe wall of the air inlet pipe positioned in the aeration chamber is provided with an air outlet hole.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: the invention provides a submersible aerator, wherein an upper cover plate and a lower cover plate are connected by a guide blade in an aeration chamber, and an aeration cavity with a water inlet and a liquid outlet positioned at a circle of circumference is formed between the upper cover plate and the lower cover plate. Under the action of the impeller, external water enters the aeration chamber from the water inlet at the top end of the aeration chamber, is premixed with air entering the aeration chamber, and the premixed steam-water mixed liquid containing a certain amount of air is used as a new medium to perform a centrifugal aeration process, so that the air quantity entering the aeration chamber is increased, the defect that water enters the aeration chamber from the bottom to enter the upper part to directly perform aeration without being premixed with the air in the prior art is overcome, and the aeration quantity is increased. Meanwhile, the plurality of guide blades divide the aeration chamber along the circumferential direction of the impeller to form a plurality of flow passages which are connected in sequence, the interval between the outlets of the adjacent flow passages is very small, and the circumferential aeration balance outside the aeration chamber is fully ensured. When the steam-water mixed liquid in the aeration cavity flows out from the circumferential opening at a high speed, the guide vane plates cut the steam-water mixed liquid to form finer water drops and bubbles, so that more oxygen is dissolved in water, the dissolved oxygen of the water body is improved, and the aeration effect is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
FIG. 1 is a schematic view of a submersible aerator according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of the aeration cell in FIG. 1;
FIG. 3 is a schematic view of the adjusting ring of FIG. 2;
FIG. 4 is a schematic view of the impeller of FIG. 1;
fig. 5 is a schematic view showing an assembled structure of the aeration chamber, the air inlet pipe and the impeller in fig. 1.
The drawings are as follows: the submersible electric pump 2, the aeration chamber 3, the impeller 4, the air inlet pipe 5, the upper cover plate 31, the lower cover plate 32, the guide vane plate 33, the adjusting ring 34, the water inlet 35, the liquid outlet 36, the upper end surface 341, the lower end surface 342, the second cutting groove 343, the hub 41, the first vane 42, the shaft hole 43, the air storage groove 44, the diffusion flow passage 45, the second vane 46, the air outlet 51 and the silencer 6.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings.
The embodiment of the invention provides a submersible aerator, which comprises a base 1, a submersible electric pump 2, an aeration chamber 3 and an air inlet pipe 5 from bottom to top as shown in fig. 1, wherein the submersible electric pump 2 is arranged on the base 1. The submerged motor pump 2 and the base 1 can be placed into the bottom of the pool by the self weight, and the submerged motor pump 2 and the base 1 can be fixed on the concrete foundation of the bottom of the pool. An impeller 4 is arranged in the aeration chamber 3, and the impeller 4 is connected with the submersible electric pump 2. One end of the air inlet pipe 5 is provided with a silencer 6 and is positioned above the liquid level of the water body, and the other end of the air inlet pipe extends into the aeration chamber 3 and is positioned above the impeller 4.
The aeration chamber 3 in this embodiment includes an upper cover plate 31, a lower cover plate 32, and a plurality of guide vanes 33, as shown in fig. 2. The upper cover plate 31 and the lower cover plate 32 are hollow revolution bodies with horn mouths formed by rotating concave curves around a central shaft, and openings are formed in the centers of the upper cover plate 31 and the lower cover plate 32. The opening of the upper cover plate 31 is larger than the opening of the lower cover plate 32, and the opening of the lower cover plate 32 is matched with the output shaft of the submersible electric pump so as to enable the output shaft of the submersible electric pump to pass through. The upper cover plate 31 and the lower cover plate 32 are arranged at intervals up and down and are connected through a plurality of guide blades 33, and an aeration cavity with a water inlet 35 positioned at the top end and a liquid outlet 36 positioned at a circle of circumference is formed between the upper cover plate 31 and the lower cover plate 32. The output shaft of the submersible pump extends into the aeration chamber through the opening of the lower cover plate 32 and is connected with the impeller 4. The lower cover plate 32 is fixed to the casing of the submersible pump. The air inlet pipe 5 is fixedly connected with the upper cover plate 31.
In the submersible aerator of the above embodiment, the aeration chamber 3 connects the upper cover plate 31 and the lower cover plate 32 by using the guide vane 33, and the opening of the aeration chamber formed between the upper cover plate 31 and the lower cover plate 32 is located at a circle. Under the action of the impeller, external water continuously enters the aeration chamber from the water inlet at the top end of the aeration chamber 3, the impeller rotating at high speed generates negative pressure in the aeration chamber, and air enters the aeration chamber through the air inlet pipe under the action of atmospheric pressure. The water and air entering from the water inlet at the top end of the aeration chamber are premixed, the mixed steam-water solution containing a certain amount of air formed by premixing flows in the direction of the impeller in the aeration chamber as a new medium, and then the centrifugal aeration process is carried out, so that the air quantity entering the aeration chamber is effectively improved. The flow of the steam-water mixed liquid is guided by the guide vane plates to flow to the liquid outlet 36, so that the steam-water mixed liquid is prevented from continuously rotating to flow to lose power, the sufficient power is ensured to flow to the outside of the aeration chamber, the moving path of the steam-water mixed liquid in the external water body is prolonged, and the aeration effect is improved. Meanwhile, the plurality of guide blades 33 divide the aeration chamber along the circumferential direction of the impeller to form a plurality of flow passages which are connected in sequence to split the steam-water mixed liquid, the interval between the outlets of the adjacent flow passages is small, the steam-water mixed liquid is sprayed out from one circle of the circumferential direction of the aeration chamber, and the uniformity of one circle of aeration outside the aeration chamber can be fully ensured. When the vapor-water mixed liquid in the aeration chamber flows out from the liquid outlet at a high speed, the guide blade plate 33 cuts the vapor-water mixed liquid to form finer water drops and bubbles, so that more oxygen is dissolved in the water, and the dissolved oxygen efficiency is improved.
Preferably, a plurality of guide vanes 33 are disposed between the upper cover plate 31 and the lower cover plate 32 at uniform intervals along the circumference of the impeller 4, and each guide vane 33 is parallel to the impeller tangential line. The steam-water mixed liquid in the aeration cavity tangentially flows along the circumference of the impeller under the action of the impeller, flows towards the liquid outlet along the direction of the guide vane plate 33, is tangentially sprayed into external water bodies from the circumference of the aeration chamber, and the guide vane plate 33 is parallel to the tangent line of the impeller, so that the influence on the flow speed of the steam-water mixed liquid is reduced, the moving path of the steam-water mixed liquid after being sprayed into the external water bodies is ensured, and the aeration effect is improved.
As a preferred example, both side surfaces of the guide vane 33 are provided with first cutting grooves vertically arranged. The first cutting groove is a V-shaped groove with a certain depth, and the V-shaped groove is vertically arranged from the top end to the bottom end of the guide vane plate. When the steam-water mixed liquid generated by the impeller rotating at high speed flows outwards at high speed and is guided by the guide vane plate in a split flow manner, the steam-water mixed liquid and the static guide vane plate do relative motion, and as the steam-water mixed liquid is in tangential motion, the first cutting grooves on the two sides of the guide vane plate respectively cut the adjacent steam-water mixed liquid flowing outwards, so that the steam-water mixed liquid is cut into finer and finer water drops and bubbles, the contact area of the bubbles and the water drops is enlarged, and more oxygen is dissolved in water. Because the first cutting groove is vertically arranged, the first cutting groove cuts the steam-water mixed liquid at different heights in the circumferential direction, the oxygen dissolving effect in the inner circumference and the height direction of the aeration chamber 3 is improved, the condition is created for improving the oxygen dissolving effect of the external water body in the circumferential direction and the height direction after the steam-water mixed liquid flows out, and the oxygen dissolving effect of the whole water body space can be improved. Preferably, the number of the first cutting grooves is 2-8, and the plurality of first cutting grooves are arranged at intervals.
As a preferred example, the aeration chamber 3 further includes an annular adjusting ring 34, the adjusting ring 34 is annular, and the adjusting ring 34 is disposed outside the guide vane 33. The inner wall of the adjusting ring 34 is fixedly connected with the outer side surface of the guide blade plate 33, and the outer diameter of the adjusting ring is smaller than or equal to the outer diameter of the aeration chamber 3. The width of the adjusting ring is equal to 20-100 mm, namely, the difference between the outer diameter and the inner diameter of the adjusting ring is 40-200 mm. As shown in fig. 3, the upper end surface 341 of the adjusting ring 34 extends obliquely upward from inside to outside, and the lower end surface 342 of the adjusting ring 34 extends obliquely downward from inside to outside, i.e., both the upper end surface and the lower end surface of the adjusting ring 34 are tapered surfaces. Preferably, the included angle α between the upper end surface of the adjusting ring 34 and the horizontal plane is 1 to 5 °, and the included angle β between the lower end surface of the adjusting ring 34 and the horizontal plane is 1 to 5 °. The inclination angles of the upper end face and the lower end face of the adjusting ring are determined according to the water depth and the dissolved oxygen requirement of the pool bottom.
In this embodiment, the adjusting ring 34 has an upper end face and a lower end face with a certain inclination angle, so that the steam-water mixture is sprayed upwards and downwards in an inclined manner, so as to enhance the oxygen dissolving effect of the upper part of the external water body and the pool bottom. Because the density of the soda water mixed solution is smaller, the main flowing direction is upward, the inclined upper end face strengthens the upward flowing of the soda water mixed solution, and the soda water mixed solution is suitable for occasions with larger water depth, and the inclined lower end face enables a part of soda water mixed solution to move obliquely downwards, so that the oxygen dissolving effect of activated sludge at the bottom of a tank is strengthened under the inertia effect.
As a preferred example, the upper end surface 341 and the lower end surface 342 of the adjusting ring 34 are each provided with a second cutting groove 343 which is annularly arranged. The steam-water mixed liquid is split and guided to flow outwards at high speed through the guide vane plates, and moves relatively to the stationary adjusting ring. Because the upper end surface and the lower end surface of the adjusting ring are gradually inclined upwards and downwards from inside to outside respectively, the second cutting groove 343 in an inclined state strengthens the cutting of the outwards flowing steam-water mixed liquid while guiding the upward and downward movement of the steam-water mixed liquid, the steam-water mixed liquid is cut into finer and finer water drops and bubbles, the contact area of air and the water drops is enlarged, and more oxygen is dissolved in water. Since the second cutting grooves 343 are provided at the upper and lower end surfaces of the adjusting ring, that is, the steam-water mixture after circumferential cutting is cut again in the circumferential direction of the upper and lower end surfaces of the adjusting ring in the horizontal direction (approximately), so as to enhance the oxygen dissolving effect of the adjusting ring in the circumferential direction, thereby cutting water droplets and air bubbles in multiple directions to form a larger, finer and finer water droplets and air bubbles. Under the guidance of the conical surface, the vapor-water mixed liquid with higher dissolved oxygen moves upwards in an inclined way or downwards in an inclined way, so that the moving path is increased, and the dissolved oxygen effect of the water body is improved.
Preferably, the number of the second cutting grooves 343 is 2-8, the second cutting grooves can be arranged at intervals or can be arranged continuously, all the second cutting grooves are concentric circles, the same cutting effect of one circle of the circumference is ensured, the same peripheral dissolved oxygen effect is ensured, and conditions are created for efficient operation of water treatment.
As a preferred example, the impeller 4 in the present embodiment includes a hub 41 and first blades 42, as shown in fig. 4, the hub 41 has a cylindrical shape, and 3 to 5 first blades 42 are provided at the tip of the hub 41 to form a centrifugal impeller. The center of the bottom end of the hub 41 is provided with a shaft hole 43 for connecting with the submersible electric pump 2, and the center of the top end of the hub 41 is provided with a gas storage groove 44. The air storage groove 44 has a diameter equal to or larger than the diameter of the shaft hole 43 and smaller than the inner diameter of the first vane 42. As shown in fig. 5. The shaft hole 43 is communicated with the air storage groove 44, and a motor shaft of the submersible electric pump 2 penetrates through the shaft hole 43 and stretches into the air storage groove 44 to be connected with the second blade 46 positioned in the air storage groove 44. The submersible electric pump 2 operates to drive the hub 41 and the second blades 46 to rotate synchronously. The hub 41 is provided with a diffusion flow passage 45, an inlet of the diffusion flow passage 45 is communicated with the air storage groove 44, and an outlet of the diffusion flow passage 45 is positioned on the outer wall of the hub 41 and is communicated with the aeration chamber 3.
The impeller 4 rotates at a high speed in the aeration chamber 3, so that negative pressure is generated in the aeration chamber 3, external water continuously enters the aeration chamber 3 through the water inlet 35, and air above the liquid level of the external water is sucked into the air inlet pipe 5. The water entering from the top end of the aeration chamber is premixed with the air entering the aeration chamber through the air inlet pipe in the downward flowing process to form premixed steam-water mixed liquid so as to improve the aeration rate. Then the first vane rotating at high speed continuously drives the premixed steam-water mixed solution to flow at high speed, so that air continuously enters the aeration chamber through the air inlet pipe to form a first steam-water mixed solution, and the first steam-water mixed solution is sprayed into a water body from a liquid outlet of the aeration chamber at high speed to perform a centrifugal aeration process. At the same time, the second vane 46 rotates at a high speed in the air storage groove, brings the premixed soda liquid mixture flowing into the air storage groove 44 into the diffusion flow passage, and injects the premixed soda liquid mixture from the outlet of the diffusion flow passage 45 into the aeration chamber 3 at a high speed. The premixed soda mixed liquid ejected from the diffusion flow passage 45 collides with the first soda mixed liquid in the aeration chamber 3, is cut and mutually fused to form finer and finer water drops and bubbles, so that oxygen in the first soda mixed liquid and the premixed soda mixed liquid is better dissolved in water to form a third soda mixed liquid, and is sprayed into a water body from a liquid outlet of the aeration chamber at a high speed.
Preferably, the outer diameter of the air inlet pipe 5 is smaller than the inner diameter of the air storage groove 44. The lower part of the air inlet pipe 5 is positioned in the air storage groove 44, and the air inlet pipe is arranged coaxially with the air storage groove. The difference between the outer diameter of the air intake pipe 5 and the inner diameter of the air storage groove 44 is 4 to 16mm, i.e., the gap width between the air intake pipe and the air storage groove 44 in the radial direction is 2 to 8mm.
The impeller 4 rotates at a high speed in the aeration chamber 3, negative pressure is generated in the aeration chamber 3, external water continuously enters the aeration chamber 3 through the water inlet 35, and air above the liquid level of the external water is sucked into the air inlet pipe 5. The water entering from the top end of the aeration chamber is premixed with the air entering the aeration chamber through the air inlet pipe in the downward flowing process to form premixed steam-water mixed liquid so as to improve the aeration rate. Then the first vane rotating at high speed continuously drives the premixed steam-water mixed liquid to fly out at high speed, so that air continuously enters the aeration chamber through the air inlet pipe to form the first steam-water mixed liquid, and the first steam-water mixed liquid is sprayed into the water body from the liquid outlet of the aeration chamber at high speed, so that the centrifugal aeration process is realized. Simultaneously, the second vane 46 rotates at a high speed, negative pressure is generated in the air storage groove 44, so that part of air in the air inlet pipe flows into the air storage groove 44, the air entering into the aeration chamber is increased (the aeration quantity is increased), the air content in the premixed soda mixed liquid in the air storage groove is improved, then the premixed soda mixed liquid flows into the diffusion flow channel 45 under the action of the second vane to form a second soda mixed liquid, and the second soda mixed liquid is injected into the aeration chamber 3 from the outlet of the diffusion flow channel 45. The second vapor-water mixed liquid ejected from the diffusion flow passage 45 collides with the first vapor-water mixed liquid in the aeration chamber 3, is cut and mutually fused to form finer and finer water drops and bubbles, so that oxygen in the first vapor-water mixed liquid and the second vapor-water mixed liquid is better dissolved in water to form fourth vapor-water mixed liquid, and is sprayed into water at a high speed from a liquid outlet of the aeration chamber.
According to the submersible aerator, inflow water at the top end of the aeration chamber is premixed with air, part of the formed premixed steam-water mixed liquid is centrifugally aerated in the aeration chamber to generate a first steam-water mixed liquid, part of the formed premixed steam-water mixed liquid enters the air storage groove, the air content in the premixed steam-water mixed liquid is increased, the premixed steam-water mixed liquid generates a second steam-water mixed liquid in the diffusion flow channel, the aeration chamber is subjected to repeated aeration mixing, more oxygen can be absorbed into water and dissolved in water, and the second steam-water mixed liquid interacts with the first steam-water mixed liquid to improve the aeration effect and the dissolved oxygen efficiency.
As a preferred example, the diffusion flow path 45 is a conical through hole, and the axis of the diffusion flow path 45 is parallel to the horizontal line. Preferably, the inlet of the diffusion flow passage 45 is larger than the outlet, i.e. the large diameter port of the conical through hole is positioned at the gas storage groove 44, the small diameter port of the conical through hole is positioned at the outer wall of the hub, and the diameter of the diffusion flow passage gradually decreases from inside to outside.
In this embodiment, after the vapor-water mixed liquid in the diffusion flow channel 45 is ejected tangentially from the outlet of the diffusion flow channel at a high speed, the diameter of the diffusion flow channel gradually decreases from inside to outside, so as to increase the ejection speed of the outlet of the diffusion flow channel and the pressure of the second vapor-water mixed liquid, further increase the impact strength of the second vapor-water mixed liquid and the first vapor-water mixed liquid in the aeration chamber, and improve the aeration effect.
More preferably, the outlet diameter of the diffusion channel 45 is 5-30 mm, and the taper is 1:3-1:8. The outlet flow velocity of the diffusion flow channel is improved, the interaction between the second steam-water mixed liquid and the first steam-water mixed liquid is enhanced, and the aeration effect is improved.
Preferably, the number of the diffusion channels 45 is 3 to 6, and the diffusion channels are uniformly distributed on the same cross section of the hub 41. A plurality of diffusion flow channels are uniformly arranged in the hub, each diffusion flow channel is respectively subjected to jet aeration, the outlet of each diffusion flow channel is used for spraying the steam-water mixed liquid at a high speed, and the hub rotates, so that the steam-water mixed liquid sprayed at a high speed by the diffusion flow channels is sprayed into the aeration chamber at a high speed in a tangential manner, and the aeration effect is improved.
Preferably, the pipe wall of the air inlet pipe 5 in the aeration chamber 3 is provided with a plurality of air outlet holes 51. Part of air in the air inlet pipe 5 can enter the aeration chamber 3 through the air outlet hole 51 positioned above the air storage groove and is premixed with water entering from the water inlet 35 at the top end of the aeration chamber 3, so as to improve aeration rate, and then the first vane 42 rotating at high speed continuously drives the steam-water mixed liquid to fly out at high speed to form negative pressure, so that the air continuously enters the aeration chamber through the air inlet pipe to form first steam-water mixed liquid. The second vane 46 rotating at high speed drives the premixed gas-water mixed liquid in the gas storage tank to rotate at high speed to form negative pressure, so that a part of air enters the gas storage tank through the bottom end outlet of the air inlet pipe 5 and the air outlet hole 51 positioned in the gas storage tank, and enters the diffusion flow passage under the drive of the premixed gas-water mixed liquid, so that the oxygen content in the premixed gas-water mixed liquid is increased, and a second gas-water mixed liquid is formed.
Preferably, the lower surface of the upper cover plate 31 and the upper surface of the lower cover plate 32 are respectively provided with a third cutting groove, and the third cutting grooves are circular and are used for cutting the mixed liquid in the aeration chamber, so that finer and finer water drops and bubbles are further formed, more oxygen is dissolved in water, and the aeration effect is improved.
The working flow of the submersible aerator of the above preferred embodiment is as follows:
the submersible electric pump 2 is started, the impeller 4 rotates, negative pressure is generated in the aeration chamber 3, external water continuously enters the aeration chamber 3 from the water inlet at the top end, and air above the liquid level of the external water is also sucked into the air inlet pipe 5. In the downward flowing process of water entering from the top end, the water is premixed with air entering the aeration chamber 3 through the air outlet hole 51 positioned above the air storage groove of the air inlet pipe to improve aeration quantity, and then the first vane 42 rotating at high speed continuously drives the steam-water mixed liquid to fly out at high speed to form negative pressure, so that the air continuously enters into the aeration chamber through the air inlet pipe to form first steam-water mixed liquid.
Simultaneously, the second vane 46 rotates at a high speed, negative pressure is generated in the air storage groove 44, so that part of air in the air inlet pipe flows into the air storage groove 44 through the air outlet hole 51 positioned in the air storage groove and the bottom opening of the air inlet pipe, the air content in the premixed vapor-water mixed liquid in the air storage groove is improved, then the premixed vapor-water mixed liquid flows into the diffusion flow channel 45 under the action of the second vane, and a second vapor-water mixed liquid is formed, and the second vapor-water mixed liquid is injected into the aeration chamber 3 from the outlet of the diffusion flow channel 45.
The second vapor-water mixture ejected from the diffusion flow path 45 collides with the first vapor-water mixture in the aeration chamber 3, and is cut and mixed to form a fourth vapor-water mixture having fine and dense water droplets and bubbles.
The fourth vapor-water mixed liquid tangentially flows along the circumference of the impeller under the action of the impeller, and the third cutting grooves on the lower surface of the upper cover plate 31 and the upper surface of the lower cover plate 32 respectively cut the mixed liquid in the aeration chamber up and down to further form finer and finer water drops and bubbles, so that more oxygen is dissolved in water.
The fourth steam-water mixed liquid flows to the liquid outlet along the guide vane plate 33 under the action of the impeller. Simultaneously, the first cutting grooves on the two side surfaces of the guide vane plate respectively cut the steam-water mixed liquid of the two adjacent flow channels, and the steam-water mixed liquid is cut into finer and finer water drops and bubbles again, so that the contact area of the bubbles and the water drops is enlarged, and more oxygen is dissolved in water.
The fourth soda water mixed liquid continues to flow to the liquid outlet of the aeration cavity, part of the soda water mixed liquid flows upwards and outwards in an inclined way along the upper end face of the adjusting ring 34, and part of the soda water mixed liquid flows downwards and outwards in an inclined way along the lower end face of the adjusting ring 34. The second cutting grooves 343 of the upper end surface and the lower end surface of the adjusting ring respectively cut the aerated water mixed liquid flowing obliquely upwards and outwards and obliquely downwards and outwards in different directions again, cut the aerated water mixed liquid into finer and finer water drops and bubbles, enlarge the contact area of air and water drops, and enable more oxygen to be dissolved in water.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention.
Claims (9)
1. The submersible aerator is characterized by comprising a base (1), a submersible electric pump (2), an aeration chamber (3) and an air inlet pipe (5) from bottom to top, wherein the submersible electric pump (2) is arranged on the base (1), and the bottom end of the air inlet pipe (5) is positioned in the aeration chamber (3); the submersible electric pump also comprises an impeller (4), wherein the impeller (4) is connected with the submersible electric pump (2) and is positioned in the aeration chamber (3); the aeration chamber (3) comprises an upper cover plate (31), a lower cover plate (32) and a plurality of guide blades (33), and openings are formed in the centers of the upper cover plate (31) and the lower cover plate (32); the upper cover plate (31) and the lower cover plate (32) are arranged at intervals up and down and are connected through a plurality of guide blades (33), and an aeration cavity with a water inlet positioned at the top end and a liquid outlet positioned at a circle of circumference is formed between the upper cover plate (31) and the lower cover plate (32);
the impeller (4) comprises a hub (41) and first blades (42), the hub (41) is cylindrical, and the first blades (42) are arranged at the top end of the hub (41); the center of the bottom end of the hub (41) is provided with a shaft hole (43) for connecting with a motor shaft of the submersible electric pump (2), and the center of the top end of the hub (41) is provided with a gas storage groove (44); the shaft hole (43) is communicated with the air storage groove (44), and a motor shaft of the submersible electric pump (2) penetrates through the shaft hole (43) and stretches into the air storage groove (44) to be connected with a second blade (46) positioned in the air storage groove (44); the inside of the hub (41) is provided with a diffusion flow passage (45), the inlet of the diffusion flow passage is communicated with the gas storage groove, and the outlet is positioned on the outer wall of the hub (41) and is communicated with the aeration chamber (3).
2. Submersible aerator according to claim 1, characterized in that several guide vanes (33) are arranged between the upper cover plate (31) and the lower cover plate (32) at even intervals along the circumference of the impeller (4), and each guide vane (33) is parallel to the impeller tangent.
3. Submersible aerator according to claim 1, characterized in that both sides of the guide vane plates (33) are provided with vertically arranged first cutting grooves.
4. Submersible aerator according to claim 1, characterized in that the aeration chamber (3) further comprises an annular adjusting ring (34), the adjusting ring (34) being arranged outside the guide vane plate (33); the upper end surface (341) of the adjusting ring (34) extends obliquely upward from inside to outside, and the lower end surface (342) of the adjusting ring (34) extends obliquely downward from inside to outside.
5. The submersible aerator according to claim 4, wherein the angle α between the upper end surface of the adjusting ring (34) and the horizontal plane is 1-5 °, and the angle β between the lower end surface of the adjusting ring (34) and the horizontal plane is 1-5 °.
6. Submersible aerator according to claim 5, characterized in that the upper end face (341) and the lower end face (342) of the adjusting ring (34) are each provided with annularly arranged second cutting grooves (343).
7. The submersible aerator according to claim 1, wherein the lower part of the air inlet pipe (5) is positioned in the air storage groove (44), the air inlet pipe and the air storage groove are coaxially arranged, and the difference between the outer diameter of the air inlet pipe (5) and the inner diameter of the air storage groove (44) is 4-16 mm.
8. A submersible aerator according to claim 1, characterized in that the diffusion flow channels (45) are conical through holes, and the axis of the diffusion flow channels (45) is parallel to the horizontal line; the inlet of the diffusion flow channel (45) is larger than the outlet; 3-6 diffusion channels (45) are uniformly distributed on the same cross section of the hub (41); the diameter of the outlet of the diffusion flow channel (45) is 5-30 mm, and the taper of the diffusion flow channel (45) is 1:3-1:8.
9. Submersible aerator according to claim 1, characterized in that the wall of the air inlet pipe (5) located in the aeration chamber (3) is provided with air outlet holes (51).
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| CN202311095361 | 2023-08-29 | ||
| CN2023110953614 | 2023-08-29 |
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| CN102659240A (en) * | 2012-05-29 | 2012-09-12 | 南京蓝深制泵(集团)股份有限公司 | Vertical submersible aeration stirrer |
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| CN110510762A (en) * | 2019-08-29 | 2019-11-29 | 南京蓝奥环境科技有限公司 | A kind of centrifugal submersible aerator |
| CN114656047A (en) * | 2022-03-24 | 2022-06-24 | 南京科技职业学院 | High-efficient dive aeration machine |
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|---|---|---|---|---|
| CN102659240A (en) * | 2012-05-29 | 2012-09-12 | 南京蓝深制泵(集团)股份有限公司 | Vertical submersible aeration stirrer |
| CN106542660A (en) * | 2015-09-21 | 2017-03-29 | 扬州绿都环境工程设备有限公司 | A kind of Biloded wheel aeration machine under water oxygenation control device |
| CN109354223A (en) * | 2018-11-14 | 2019-02-19 | 南京合工智能环保研究院有限公司 | A kind of submersible agitating aerator |
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