CN113754087B - Aeration device - Google Patents
Aeration device Download PDFInfo
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- CN113754087B CN113754087B CN202111043497.1A CN202111043497A CN113754087B CN 113754087 B CN113754087 B CN 113754087B CN 202111043497 A CN202111043497 A CN 202111043497A CN 113754087 B CN113754087 B CN 113754087B
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- aeration
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- aeration cover
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- 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
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- 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
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- 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
Abstract
The invention discloses an aeration device, which comprises an aeration body, wherein the aeration body comprises a submersible electric pump, an impeller, a flow guide cylinder, an aeration cover I and an aeration cover II, and the submersible electric pump is arranged in the flow guide cylinder and is connected with the flow guide cylinder; the impeller is connected with the submersible electric pump and is positioned above the submersible electric pump; the first aeration cover is arranged at the top end of the guide cylinder, and the impeller is positioned in an inner cavity of the first aeration cover; the second aeration cover is arranged above the impeller and is connected with the first aeration cover; a first flow channel is formed in the inner cavity of the first aeration cover, and a second flow channel is formed in the gap between the first aeration cover and the second aeration cover; the upper part of the second aeration cover is in an inverted bell mouth shape; the radius of the top end of the second exposure cover is smaller than that of the top end of the first exposure cover. The aeration device provided by the invention can expand the spraying range of the water body, increase the mixing effect of the water body and air, and effectively improve the self-purification capacity of the water body.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to an aeration device.
Background
In recent years, the water quality of rivers and lakes is continuously deteriorated, an aerator is generally adopted to aerate and oxygenate a severely anoxic water body, the self-purification capacity of the water body is improved, and the existing surface aerator has some defects in oxygenation of the water body:
the air guide sleeve at the outlet section of the impeller of the aerator is a hollow cylinder, so that the air guide sleeve limits the diffusion of fluid to the periphery and reduces the service range of the sprayed fluid; on the other hand, the fluid rotates upwards in the air guide sleeve, the lift of the fluid is reduced, and the spraying height is reduced. The two aspects reduce the mixing effect of the liquid sprayed by the aerator and the air, and limit the dissolved oxygen in the water body.
Disclosure of Invention
In order to solve the technical problems, embodiments of the present invention provide an aeration apparatus, which can expand the spraying range of a water body, increase the mixing effect of the water body and air, and effectively improve the self-purification capability of the water body.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
the embodiment of the invention provides an aeration device, which comprises an aeration body, wherein the aeration body comprises a submersible electric pump, an impeller, a flow guide cylinder, a first aeration cover and a second aeration cover; the impeller is connected with the submersible electric pump and is positioned above the submersible electric pump; the first aeration cover is arranged at the top end of the guide cylinder, and the impeller is positioned in an inner cavity of the first aeration cover; the second aeration cover is arranged above the impeller and is connected with the first aeration cover; a first flow channel is formed in the inner cavity of the first aeration cover, and a second flow channel is formed in the gap between the first aeration cover and the second aeration cover; the upper part of the second aeration cover is in an inverted bell mouth shape; and the radius of the top end of the second aeration cover is smaller than that of the top end of the first aeration cover.
As a further improvement of the embodiment of the invention, the difference value between the radius of the top end of the second aeration cover and the radius of the top end of the first aeration cover is L, and the L is 10-50 mm.
As a further improvement of the embodiment of the invention, the second aeration cover is positioned above the first aeration cover.
As a further improvement of the embodiment of the invention, the upper part of the first aeration cover is in a straight mouth shape.
As a further improvement of the embodiment of the invention, a first guide plate is arranged on the inner wall of the first aeration cover, and a connecting hole is formed in the first guide plate; a second guide plate corresponding to the first guide plate is arranged on the outer wall of the second aeration cover, and a longitudinal adjusting hole is formed in the second guide plate; and fasteners are arranged in the connecting holes of the first guide plate and the longitudinal adjusting holes of the second guide plate.
As a further improvement of the embodiment of the present invention, the number of the first guide plates and the number of the second guide plates are 2 to 4, and the first guide plates correspond to the second guide plates one to one.
As a further improvement of the embodiment of the invention, a convex ring is arranged on the circumference of the inner wall of the top end of the second aeration cover, and the convex ring is an arc-shaped bulge.
As a further improvement of the embodiment of the invention, the distance from the top end of the first aeration cover to the outside water surface is H, and the H is 0-200 mm.
As a further improvement of the embodiment of the invention, the inner wall of the guide cylinder is provided with a guide plate, and the submersible electric pump is connected with the guide cylinder through the guide plate.
As a further improvement of the embodiment of the invention, the aeration device also comprises a buoy and a floating body, wherein the buoy and the aeration body are both connected with the floating body; the oxygen concentration sensor is arranged below the floating body; the submersible electric pump is a variable-frequency submersible electric pump.
According to the aeration device provided by the embodiment of the invention, the aeration body is provided with the first aeration cover and the second aeration cover, the inner cavity of the second aeration cover forms the first flow channel, the gap between the first aeration cover and the second aeration cover forms the second flow channel, the section of the outlet end of the second flow channel is smaller than that of the inlet end, and water flows out of the first flow channel and the second flow channel under the action of the impeller and falls after being respectively contacted with air. Through setting up two runners to increase the area of contact of rivers and outside air, improved the mixed effect of water and air. The upper part of the second aeration cover is in an inverted bell mouth shape, so that water flow in the first flow channel is obliquely and upwards sprayed under the guiding action of the bell mouth, the water flow spraying range of the first flow channel is expanded, the contact area of the water flow and air is increased, and the oxygen dissolving effect of a water body is improved. The radius of the top end of the second aeration cover is smaller than that of the top end of the first aeration cover, so that water in the second flow channel is obliquely and upwards sprayed to the periphery, the water flow spraying range of the second flow channel is expanded, the contact area of the water flow and air is increased, and the dissolved oxygen effect of the water body is improved; simultaneously, the water flow jetted by the first flow channel is located above the water flow jetted by the second flow channel, the water flow jetted by the second flow channel and obliquely upwards mixed with air impact the water flow jetted by the first flow channel and containing air, and the air-water mixed liquid of the two flow channels is divided into finer water drops, so that more air is absorbed, the contact area of the water body and the air is further increased, the aeration effect is improved, and the dissolved oxygen amount of the water body is increased.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used 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 it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic plan view of an aeration apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an aeration body according to an embodiment of the present invention;
FIG. 3 is a schematic view of the aeration effect of FIG. 2;
fig. 4 is a schematic structural view of an aeration body according to another embodiment of the present invention.
The figure shows that: the device comprises a buoy 1, a floating body 2, an aeration body 3, a submersible electric pump 31, an impeller 32, a first aeration cover 33, a convex ring 34, a second aeration cover 35, an oxygen concentration sensor 4, a first guide plate 36-1, a second guide plate 36-2, a fastener 37, a guide cylinder 38, a guide plate 39, a difference value between the radius of the top end of the second aeration cover and the radius of the top end of the first aeration cover is shown by L, and the distance between the outside water surface and the top end of the first aeration cover 33 is shown by H.
Detailed Description
The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.
An embodiment of the present invention provides an aeration apparatus, as shown in fig. 1 and 2, including an aeration body 3. The aeration body 3 comprises a submersible electric pump 31, an impeller 32, a guide cylinder 38, a first aeration cover 33 and a second aeration cover 35, wherein the submersible electric pump 31 is arranged in the guide cylinder 38 and is connected with the guide cylinder 38. The impeller 32 is connected to the submersible electric pump 31 and is located above the submersible electric pump 31. The first aeration cover 33 is arranged at the top end of the guide shell 38, and the impeller 32 is positioned in the inner cavity of the first aeration cover 33. The second aeration cover 35 is arranged above the impeller 32 and is connected with the first aeration cover 33. The inner cavity of the second aeration cover 35 forms a first flow passage, and a gap between the first aeration cover 33 and the second aeration cover 35 forms a second flow passage. The upper part of the second aeration cover 35 is in an inverted bell mouth shape. The radius of the top end of the second exposure cover 35 is smaller than that of the top end of the first exposure cover 33. Preferably, the guide cylinder 38 and the aeration cover 33 are integrated.
In the aeration device of the above embodiment, the aeration body 3 has two flow channels, one of which is a first flow channel formed by the inner cavity of the second aeration cover 35, and the other is a second flow channel formed by the gap between the first aeration cover 33 and the second aeration cover 35. The flow of water is forced by the impeller 32 to exit the first and second flow channels, with the outlet gap of the second flow channel being smaller than the inlet gap and the axial flow velocity of the fluid increasing with increasing radius across the cross-section in front of the impeller. Therefore, the fluid pressure of the second flow passage is greater than that of the first flow passage, and the fluid of the two flow passages falls after contacting with the air.
In this embodiment, through setting up two runners to increase the area of contact of rivers and outside air, improved the mixed effect of water and air. When water flows out of the first flow channel, the upper horn mouth of the second aeration cover 35 plays a guiding role, so that the water flow in the first flow channel is upwards sprayed in an inclined mode towards the periphery, the water flow spraying range of the first flow channel is expanded, the contact area of the water flow and air is increased, and the dissolved oxygen effect of a water body is improved. The radius of the top end of the second aeration cover 35 is smaller than that of the top end of the first aeration cover 33, so that water in the second flow channel is obliquely and upwards sprayed to the periphery, the water flow spraying range of the second flow channel is expanded, the contact area of water flow and air is increased, and the oxygen dissolving effect of the water body is improved. The upper part of the second aeration cover 35 is in an inverted bell mouth shape, the radius of the top end of the second aeration cover 35 is smaller than that of the first aeration cover 33, meanwhile, the water flow sprayed by the first flow channel is positioned above the water flow sprayed by the second flow channel, the air-water mixed liquid sprayed by the first flow channel is impacted by the air-water mixed liquid sprayed by the second flow channel, and the air-water mixed liquid in the two flow channels is divided into finer water drops, so that the contact area between the water drops and air is increased, more air is absorbed, the aeration effect is further improved, and the dissolved oxygen amount of the water is increased.
In this embodiment, the upper portion of the first aeration cover 33 may be in an inverted bell mouth shape, or may be in a straight mouth shape.
In the first scheme, as shown in fig. 2 and 3, the upper parts of the first aeration cover 33 and the second aeration cover 35 are in inverted bell mouth shapes, and water in the second flow channel is obliquely and upwards sprayed towards the periphery.
In the second scheme, as shown in fig. 4, the upper part of the first aeration cover 33 is in a straight mouth shape, so that the water flow sprayed by the second flow channel is sprayed upwards in an inclined manner, and the included angle between the spraying direction and the vertical line is less than 45 degrees. Under the action of the combined fluid of the inclined upward direction and the vertical upward direction, the outlet water flow direction of the water flow is closer to the plumb line, so that the spraying height is increased. The intensity of the water flow which is approximately vertical and upwards sprayed and impacts the water flow sprayed by the first flow channel is high, so that the effect of cutting the gas-water mixed liquid of the two flow channels into finer water drops is better, more air is absorbed, and the mixing effect is improved.
Preferably, the difference value between the radius of the top end of the second aeration cover 35 and the radius of the top end of the first aeration cover 33 is L, and L is 10 mm-50 mm. The arrangement is favorable for spraying the water in the second flow channel to the periphery, so that the spraying range is expanded; meanwhile, partial water flow of the second flow channel can be sprayed upwards, the water flow spraying height is increased, the mixing area of the water body and the air is increased, and the mixing effect is improved.
As a preferable example, the inner wall of the first aeration cover 33 is provided with a first guide plate 36-1, and the first guide plate 36-1 is provided with a connecting hole. The outer wall of the second aeration cover 35 is provided with a second guide plate 36-2 corresponding to the first guide plate 36-1, and the second guide plate 36-2 is provided with a longitudinal adjusting hole. The connecting holes are matched with the longitudinal adjusting holes, and the connecting holes of the first guide plate 36-1 and the longitudinal adjusting holes of the second guide plate 36-2 are internally provided with fasteners 37.
In the above embodiment, the second aeration cover 35 can move up and down relative to the first aeration cover 33 and is fixed by the fastener 37 to adjust the gap between the first aeration cover 33 and the second aeration cover 35, so as to further adjust the water flow pressure of the two aeration covers, and realize different spraying diameters and different spraying heights of the second flow channel, so as to achieve different aeration effects.
For example: the first aeration cover 33 is fixed, the second aeration cover 35 moves downwards and then is fixed by the fastener 37, at the moment, the gap between the first aeration cover 33 and the second aeration cover 35 is reduced, meanwhile, the tangential angle of the outer wall outlet of the second aeration cover 35 is reduced, the fluid pressure is increased when fluid with a certain flow passes through the outlet of the second flow passage under the combined action of the first aeration cover 33 and the second aeration cover, and the spraying range is larger.
The first aeration cover 33 is fixed, the second aeration cover 35 moves upwards and then is fixed by the fastener 37, at the moment, the gap between the first aeration cover 33 and the second aeration cover 35 is enlarged, meanwhile, the tangential angle of the outer wall outlet of the second aeration cover 35 is increased, the combined action of the first aeration cover 33 and the second aeration cover reduces the pressure of the fluid outlet when fluid with a certain flow passes through the second flow channel, and the spraying range is reduced.
According to the flow distribution of the two flow channels and the adjustment of the size of the gap of the second flow channel, the spraying range of the first flow channel can be set to be equal to that of the second flow channel, and the spraying range of the first flow channel can also be set to be larger than or smaller than that of the second flow channel.
The first guide plate 36-1 and the second guide plate 36-2 in the above embodiments are used to adjust the gap between the two aeration covers and connect the two aeration covers, and to improve the turbulence effect between the two aeration covers, i.e., the second flow channel, so as to prevent the water flow from rotating and affecting the water flow spraying range of the second flow channel.
Preferably, the number of the first diversion plates 36-1 and the second diversion plates 36-2 is 2-4, and the first diversion plates 36-1 correspond to the second diversion plates 36-2 one by one.
Preferably, the second exposure mask 35 is located above the first exposure mask 33, so that the fluid ejected from the first flow channel is located above the fluid ejected from the second flow channel, as shown in fig. 3. Meanwhile, the falling paths of the sprayed fluid of the first flow channel and the second flow channel are increased, the contact area of the fluid and air is further increased, and the mixing effect is improved.
Preferably, a convex ring 34 is arranged on the circumference of the inner wall of the top end of the second aeration cover 35, and the convex ring 34 is an arc-shaped bulge. The collar 34 serves two purposes: firstly, when the fluid arrived the protruding ring 34 at the end of the second 35 of the aeration cover, the water flow was slightly lifted, and the water flow changed direction after passing through the protruding ring 34, and to the diffusion blowout all around, increased spray area once more, improved the mixed effect of fluid and air. Secondly, after the fluid passes through the convex ring 34, the water flow around the convex ring 34 moves to the center of the second aeration cover 35 to play a turbulent flow effect, so that the rotating motion of the water flow of the second aeration cover 35 is reduced, the spraying height of the fluid in the second aeration cover 35 is increased, the contact area of the water flow and the air is increased, and the mixing effect of the fluid and the air is further improved.
As a preferred example, the aeration cover I33 is submerged by the external water surface, the distance from the top end of the aeration cover I33 to the external water surface is H, and H is 0 mm-200 mm.
Preferably, the guide plate 39 is disposed on the inner wall of the guide cylinder 38, and the submersible electric pump 31 is connected to the guide cylinder 38 through the guide plate 39. The guide plate 39 is used to fix the submersible electric pump 31 in the guide cylinder 38, and to improve the turbulence effect of the guide cylinder 38, so as to prevent the water flow from rotating and moving linearly from bottom to top.
As a preferable example, the aeration device of the embodiment of the invention further comprises a floating body 1 and a floating body 2, and the floating body 1 and the aeration body 3 are both connected with the floating body 2. The float 1 is installed on the floating body 2, and the aeration body 3 is assembled on the floating body 2. When the aeration device works, the floating barrel 1 plays a role in changing the buoyancy of the whole device and adjusting the submerging depth of the aeration device, the floating body 2 floats on the water surface, and the aeration body 3 moves along with the floating body 2. Preferably, the number of the floating barrels 1 is 3-4, the floating barrels are uniformly distributed below the floating body 2 to form an equilateral triangle or a square, and the aeration device can stably float in the water body.
The aeration device of the embodiment of the invention also comprises an oxygen concentration sensor 4, wherein the oxygen concentration sensor 4 is arranged below the floating body 2 and is connected with the control system. The submersible electric pump 31 is a variable frequency submersible electric pump. The oxygen concentration sensor 4 may employ an oxygen sensor KE-25 of fegarro, japan. When the concentration of oxygen in water is lower than a first set value, the control system increases the rotating speed of the variable-frequency submersible electric pump; when the oxygen content in the water reaches a second set value, the normal frequency aeration is resumed; when the oxygen content in the water is higher than a third set value, the control system reduces the frequency of the variable-frequency submersible electric pump; and when the oxygen content in the water reaches a second set value, the normal frequency aeration is resumed. The third set value is larger than the second set value, and the second set value is larger than the first set value.
The working process of the aeration device of the embodiment is as follows:
and (3) putting the assembled aeration device into water, and adjusting the weight of the liquid in the buoy 1 to enable the liquid level to be higher than the top end of the aeration cover I33 by a proper distance. The aeration body 3 is started, and the impeller 32 drives the water flow to move upwards at high speed. The fluid is distributed into two streams as it passes through aeration hood one 33 and aeration hood two 35. The outer ring water flow gushes out from the gap (namely the second flow passage) between the first aeration cover 33 and the second aeration cover 35 at a high speed, and the fluid outlet pressure of the second flow passage is higher. In the first scheme, the radius of the top end of the second aeration cover 35 is smaller than that of the top end of the first aeration cover 33, high-pressure water flows obliquely upwards to be sprayed out to the periphery, the area of the spraying range is increased, in the second scheme, the high-pressure water flows approach to vertical upwards spraying, the spraying height is increased, and splashed water splash and air around the liquid level are mixed and then fall into the water surface. The inner ring water flow gushes out from the inner cavity (namely the first flow channel) of the second aeration cover 35, when the fluid reaches the convex ring 34 at the tail end of the second aeration cover 35, the water flow is slightly lifted, the water flow changes the direction after passing through the convex ring 34 and is also sprayed out in a diffused mode all around, the spraying area is increased, and the mixing effect of the fluid and the air is improved. Meanwhile, after the fluid passes through the convex ring 34, the fluid moves towards the center of the second aeration cover 35 along the water flow around the convex ring 34, so that a turbulent flow effect is achieved, the rotating motion of the water flow of the second aeration cover 35 is reduced, the jet height of the fluid in the second aeration cover 35 is increased, and the mixing effect of the fluid and air is improved.
And the fluid sprayed by the first flow channel and the second flow channel simultaneously is mixed with air, and the air is mixed into the water body. The gas-water mixed liquid sprayed by the first flow channel is arranged above the gas-water mixed liquid sprayed by the second flow channel, the outlet pressure of the second flow channel is higher than the pressure of the first flow channel, the gas-water mixed liquid continuously sprayed by the second flow channel and obliquely upwards or approximately vertically upwards continuously impacts the gas-water mixed liquid sprayed by the first flow channel, and the gas-water mixed liquid of the two flow channels is divided into finer water drops, so that more air is absorbed, and finally the water drops into the water body, and the dissolved oxygen amount of the water body is increased.
According to the different demands of aeration rate, through adjusting the clearance size between aeration cover one 33 and the aeration cover two 35, realize different operating pressure between two aeration covers, realize different injection diameter scope, reach different aeration effects.
When the concentration of oxygen in water is lower than a first set value, the control system increases the rotating speed of the variable-frequency submersible electric pump; when the oxygen content in the water reaches a second set value, the normal frequency aeration is resumed; when the oxygen content in the water is higher than a third set value, the control system reduces the frequency of the variable-frequency submersible electric pump; and when the oxygen content in the water is recovered to the second set value, the normal frequency aeration is recovered.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The aeration device is characterized by comprising an aeration body (3), wherein the aeration body (3) comprises a submersible electric pump (31), an impeller (32), a guide cylinder (38), a first aeration cover (33) and a second aeration cover (35), and the submersible electric pump (31) is arranged in the guide cylinder (38) and is connected with the guide cylinder (38); the impeller (32) is connected with the submersible electric pump (31) and is positioned above the submersible electric pump (31); the first aeration cover (33) is arranged at the top end of the guide shell (38), and the impeller (32) is positioned in an inner cavity of the first aeration cover (33); the second aeration cover (35) is arranged above the impeller (32) and is connected with the first aeration cover (33); the inner cavity of the second aeration cover (35) forms a first flow channel, and a gap between the first aeration cover (33) and the second aeration cover (35) forms a second flow channel; the upper part of the second aeration cover (35) is in an inverted bell mouth shape; the radius of the top end of the second aeration cover (35) is smaller than that of the top end of the first aeration cover (33); a convex ring (34) is arranged on the circumference of the inner wall of the top end of the second aeration cover (35), and the convex ring (34) is an arc-shaped protrusion; the upper portion of the first aeration cover (33) is straight mouth-shaped, the second flow channel approaches to the strength of the water flow jetted upwards vertically and impacting the first flow channel, so that the effect of cutting the gas-water mixed liquid of the two flow channels into finer water drops is better, more air is absorbed, and the mixing effect is improved.
2. An aeration device according to claim 1, wherein the difference between the radius of the top end of the second aeration cover (35) and the radius of the top end of the first aeration cover (33) is L, and the L is 10mm to 50 mm.
3. An aeration device according to claim 1, wherein the second aeration hood (35) is positioned above the first aeration hood (33).
4. An aeration device according to claim 1, wherein the inner wall of the aeration cover I (33) is provided with a first guide plate (36-1), and the first guide plate (36-1) is provided with a connecting hole; a second guide plate (36-2) corresponding to the first guide plate (36-1) is arranged on the outer wall of the second aeration cover (35), and a longitudinal adjusting hole is formed in the second guide plate (36-2); and fastening pieces (37) are arranged in the connecting holes of the first guide plate (36-1) and the longitudinal adjusting holes of the second guide plate (36-2).
5. An aeration device according to claim 4, characterized in that the number of the first guide plate (36-1) and the second guide plate (36-2) is 2-4, and the first guide plate (36-1) and the second guide plate (36-2) are in one-to-one correspondence.
6. An aeration device according to claim 1, wherein the distance between the top end of the aeration cover I (33) and the external water surface is H, and the H is 0 mm-200 mm.
7. An aeration device according to claim 1, wherein the inner wall of the guide cylinder (38) is provided with a guide plate (39), and the submersible electric pump (31) is connected with the guide cylinder (38) through the guide plate (39).
8. An aeration device according to claim 1, characterized in that it further comprises a float (1) and a float body (2), wherein the float (1) and the aeration body (3) are both connected with the float body (2); the oxygen concentration sensor (4) is arranged below the floating body (2); the submersible electric pump (31) is a variable-frequency submersible electric pump.
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|---|---|---|---|---|
| US4468358A (en) * | 1980-07-08 | 1984-08-28 | Haegeman Johny H | Apparatus for mixing air and liquid |
| CN204981364U (en) * | 2015-09-24 | 2016-01-20 | 上海欧保环境科技有限公司 | Spring type aeration purifier |
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