High-efficiency aerator and aeration method

Abstract

The application provides a high-efficiency aerator and an aeration method, the high-efficiency aerator comprising an air inlet pipe, an aeration chamber and a submersible electric pump, the submersible electric pump being horizontally arranged, and the aeration chamber being arranged on the side of the submersible electric pump; the aeration chamber comprising an aeration disc provided with an aeration cavity; the aeration cavity being provided with a first impeller and a second impeller connected with the submersible electric pump; the aeration disc being provided with a plurality of flow channel units, each flow channel unit comprising a first flow channel, a second flow channel and a third flow channel; the inlet of the first flow channel and the inlet of the second flow channel being opposite to the first impeller, the inlet of the second flow channel being opposite to the second impeller, and the outlet of the third flow channel being communicated with the second flow channel; the axis of the second flow channel being perpendicular to the axis of the second impeller, and the first flow channel being arranged in an inclined manner along the direction from the aeration disc to the outside and the second impeller; the air inlet pipe being arranged above the aeration disc and communicated with the aeration cavity. The high-efficiency aerator and the aeration method provided by the application can effectively increase the air quantity entering the water body and balance the oxygen dissolving efficiency at different positions.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a high-efficiency aerator and aeration method. Background Technology

[0002] Submersible centrifugal aerators are widely used in wastewater treatment and water aeration in rivers and lakes. The high-speed rotating impeller creates negative pressure in the mixing disc, drawing air from the water surface into the disc to form an air-water mixture. This mixture is then sprayed out at high speed from the surrounding channels, oxygenating the water. However, existing submersible centrifugal aerators have the following limitations: 1. The amount of air drawn in by existing submersible centrifugal aerators is limited, restricting dissolved oxygen efficiency; 2. Existing submersible centrifugal aerators produce large and few water droplets and bubbles, limiting dissolved oxygen effects; 3. The horizontal channel design of existing submersible centrifugal aerators results in better aeration at the bottom of the tank, but uneven dissolved oxygen effects at different depths. Summary of the Invention

[0003] The purpose of this invention is to provide a high-efficiency aerator and aeration method that effectively increases the amount of air entering the water body and balances the dissolved oxygen efficiency at different locations, thereby solving the technical problems existing in the background art.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows:

[0005] In a first aspect, the present invention provides a high-efficiency aerator, comprising an air inlet pipe, an aeration chamber, a submersible pump, and a base. The submersible pump is horizontally mounted on the base, and the aeration chamber is disposed on the side of the submersible pump. The aeration chamber includes an aeration disc, which has an aeration cavity with an upper opening. A first impeller and a second impeller are horizontally spaced within the aeration cavity, both connected to the submersible pump, with the second impeller located between the first impeller and the submersible pump. The aeration disc also includes several flow channel units distributed circumferentially along the aeration cavity and communicating with it. Each flow channel unit includes components with axes aligned on the same side. The system comprises a first flow channel, a second flow channel, and a third flow channel in planar shape. The inlets of the first and second flow channels are both opposite to the first impeller, the inlet of the second flow channel is opposite to the second impeller, and the outlet of the third flow channel is connected to the second flow channel. The axis of the second flow channel is perpendicular to the axis of the second impeller. The first flow channel is inclined outward from the aeration disc towards the second impeller. The diameter of the first impeller is larger than the diameter of the second impeller. The diameter of the third flow channel is smaller than the diameters of the first and second flow channels. The air inlet pipe is positioned above the aeration disc, with its top end above the liquid surface and its bottom end connected to the aeration chamber.

[0006] As a further improvement of the present invention, the aeration chamber further includes a water jacket, which is disposed above the aeration disc; the water jacket is fitted outside the air inlet pipe, and its bottom end is located at the upper opening of the aeration chamber; the top end of the water jacket is located below the liquid surface.

[0007] As a further improvement of the present invention, the water jacket includes a water distribution plate and a sleeve, the water distribution plate being disposed at the top of the sleeve; the diameter of the sleeve gradually decreases from top to bottom; the air inlet pipe is located inside the sleeve and has an air outlet hole on the pipe wall.

[0008] As a further improvement of the present invention, the sleeve is eccentrically positioned relative to the air intake pipe.

[0009] As a further improvement of the present invention, the outer wall of the air intake pipe located inside the sleeve is provided with a first spiral cutting body, and the inner wall of the sleeve is provided with a second spiral cutting body.

[0010] As a further improvement of the present invention, the sleeve adopts a telescopic tube structure.

[0011] As a further improvement of the present invention, the first impeller includes an inner hub, an outer hub, and a plurality of first blades. The inner hub and the outer hub are coaxially connected by a plurality of stiffeners, and the plurality of first blades are arranged around the outer hub. The inner hub is connected to a submersible pump. The inner hub is frustum-shaped, and the end of the inner hub near the second impeller is the larger end. The first blades are mixed-flow blades.

[0012] As a further improvement of the present invention, the inner wall of the outer hub and the outer wall of the inner hub are both provided with a third spiral cutting body; the end face of the inner hub near the second impeller is provided with a plurality of concentrically arranged first annular cutting blades; the end face of the second hub of the second impeller near the first impeller is provided with a plurality of concentrically arranged second annular cutting blades.

[0013] Secondly, the present invention also provides an aeration method using the submersible aerator provided in the first aspect; the method includes:

[0014] The first and second impellers rotate synchronously in the aeration chamber, creating a vacuum in the aeration chamber; air above the liquid surface enters the aeration chamber of the aeration disc through the air inlet pipe, and water enters the aeration chamber, where they mix and merge to form a steam-water mixture, which is then sprayed into the water body under the action of the first and second impellers.

[0015] The process involves spraying the steam-water mixture into the water body under the action of the first and second impellers, specifically including:

[0016] A portion of the steam-water mixture forms the first aeration fluid under the action of the first impeller. Most of the first aeration fluid flows into the first channel to form the first steam-water mixture, while a small portion flows into the third channel to form the third steam-water mixture. Another portion of the steam-water mixture forms the second aeration fluid under the action of the second impeller. The second aeration fluid flows into the second channel to form the second steam-water mixture. The third steam-water mixture flows into the second channel and impacts the second steam-water mixture, causing water droplets and bubbles to collide and mix within the second channel, forming the fourth steam-water mixture. The first steam-water mixture flowing out of the first channel is sprayed obliquely towards the outside of the aeration disc and towards the second impeller. Multiple streams of the first steam-water mixture are sprayed out circumferentially along the aeration disc, achieving aeration in three-dimensional space. The fourth steam-water mixture flowing out of the second channel is sprayed in a direction perpendicular to the axis of the second impeller. Multiple streams of the fourth steam-water mixture are sprayed out circumferentially along the aeration disc, achieving aeration on the vertical plane. The first and fourth steam-water mixtures cut, collide, and mix with each other, making the water droplets and bubbles finer and enhancing the aeration effect in three-dimensional space.

[0017] As a further improvement of the present invention, air above the liquid surface enters the aeration chamber of the aeration disc through the air inlet pipe, and water enters the aeration chamber, specifically including:

[0018] Water near the liquid surface enters the casing through the water distribution plate, continuously drawing water from the surrounding area into the casing, forming a first pre-steam-water mixture. Air above the liquid surface enters the air inlet pipe through the top opening, and a small portion of the air in the air inlet pipe enters the space between the casing and the air inlet pipe through the air outlet on the pipe wall, mixing with the first pre-steam-water mixture to form a second pre-steam-water mixture. As the second pre-steam-water mixture flows downward, it continuously cuts and merges with the air entering the space between the casing and the air inlet pipe through the air outlet. Simultaneously, the first and second spiral cutters continuously cut the downward-moving second pre-steam-water mixture in the inner and outer circumferential directions, making the water droplets and bubbles smaller and denser, and continuously changing the circumferential and radial positions of the bubbles, thus continuously increasing the oxygen transfer efficiency. The oxygen content of the second pre-steam-water mixture continuously increases, eventually entering the aeration chamber. Most of the air in the air inlet pipe enters the aeration chamber through the bottom opening of the air inlet pipe.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] This invention provides a high-efficiency aerator and aeration method. Two impellers of different diameters are arranged in the aeration chamber, generating aeration fluids with different velocities and directions. Several groups of flow channels with three channels are arranged on the aeration disc. The first aeration fluid generated by the first impeller enters the first and third flow channels, forming a first and a third air-water mixture, respectively. The second aeration fluid generated by the second impeller enters the second flow channel, forming a second air-water mixture. Because the velocity of the third air-water mixture in the third flow channel is greater than that in the second flow channel, and the two fluids move in different directions, the third air-water mixture flowing out of the third flow channel tilts and impacts the second air-water mixture, causing water droplets and bubbles to collide and mix violently within the second flow channel. This results in smaller and denser water droplets and bubbles, continuously altering the air's movement path. The first channel sprays the first air-water mixture in the first channel, which is sprayed circumferentially around the aeration disc onto the surrounding water on a vertical plane perpendicular to the second impeller axis, transferring oxygen to the water and achieving aeration in the Y and Z directions. The second channel sprays the first air-water mixture circumferentially around the aeration disc and towards the second impeller, achieving aeration in the X, Y, and Z directions. Simultaneously, the inclined first air-water mixture and the vertically sprayed fourth air-water mixture cut, collide, and mix with each other, making the water droplets and bubbles in the entire space smaller and denser, thus enhancing and balancing the dissolved oxygen effect throughout the space. This overcomes the limitation of existing centrifugal aerators that can only perform circumferential aeration at a certain depth, realizing a three-dimensional aeration and dissolved oxygen process. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a high-efficiency aerator provided in an embodiment of the present invention;

[0022] Figure 2 for Figure 1 Schematic diagram of the middle water jacket;

[0023] Figure 3 for Figure 1 A schematic diagram of the eccentrically arranged intake manifold and sleeve;

[0024] Figure 4 for Figure 1 A schematic diagram of the structure of the first impeller in the middle;

[0025] Figure 5 for Figure 1 A schematic diagram of the structure of the second impeller.

[0026] The labels in the attached diagram are as follows: 1-Inlet pipe, 11-Outlet hole, 12-First spiral cutter, 2-Water jacket, 21-Water distribution plate, 22-Upper pipe, 23-Lower pipe, 24-Second spiral cutter, 3-Aeration plate, 31-First flow channel, 32-Second flow channel, 33-Third flow channel, 4-First impeller, 41-First shaft hole, 42-Inner hub, 43-Third spiral cutter, 44-Fourth flow channel, 45-First blade, 46-Outer hub, 47-First annular cutter, 5-Second impeller, 51-Second shaft hole, 52-Second hub, 53-Blade, 54-Second annular cutter, 6-Submersible pump, 7-Base. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] This invention provides a high-efficiency aerator, such as... Figure 1 As shown, the system includes an air inlet pipe 1, an aeration chamber, a submersible pump 6, and a base 7. The submersible pump 6 is horizontally mounted on the base 7, and the aeration chamber is located on the side of the submersible pump 6. The submersible pump 6 and the base 7 can be placed into the bottom of the pool by their own weight, or the submersible pump 6 together with the base can be fixed to the concrete structure at the bottom of the pool.

[0029] The aeration chamber includes an aeration disc 3, which has an aeration cavity with an opening at the top. An air inlet pipe is positioned above the aeration disc, with its top end above the liquid surface and its bottom end at the top opening of the aeration cavity, communicating with the aeration cavity. A first impeller 4 and a second impeller 5 are located within the aeration cavity, both connected to a submersible pump 6. The first impeller 4 and the second impeller 5 are arranged horizontally at intervals, with the second impeller 5 positioned between the first impeller 4 and the submersible pump 6. The aeration disc 3 also includes several flow channel units distributed circumferentially around the aeration cavity and communicating with it. Each flow channel unit includes a first flow channel 31, a second flow channel 32, and a third flow channel 33 with their axes aligned on the same plane. Figure 1 As shown, the inlet of the first flow channel 31 and the inlet of the third flow channel 33 are both opposite to the first impeller 4, the inlet of the second flow channel 32 is opposite to the second impeller 5, and the outlet of the third flow channel 33 is connected to the second flow channel 32. All flow channels are located on the same side of the air inlet pipe and are arranged adjacent to each other, with the first flow channel 31 closer to the air inlet pipe 1 and the second flow channel 32 farther away from the air inlet pipe 1. The axis of the second flow channel 32 is perpendicular to the axis of the second impeller. The first flow channel is inclined outwards from the aeration plate and towards the second impeller, that is, there is an angle between the axis of the first flow channel and the axis of the first impeller. The axis of the third flow channel has an angle between the axis of the first impeller and the axis of the second flow channel. The diameter of the first impeller is larger than the diameter of the second impeller. The diameter of the third flow channel is smaller than the diameter of the first flow channel and the diameter of the second flow channel.

[0030] The high-efficiency aerator in the above embodiment has two impellers of different diameters in the aeration chamber, which generate aeration fluids with different speeds and directions. The aeration disc has several flow channel units with three flow channels. The first aeration fluid generated by the first impeller enters the first and third flow channels, forming a first and a third air-water mixture, respectively. Because the diameter of the third flow channel is smaller than that of the first flow channel, most of the air-water mixture generated by the first impeller enters the first flow channel, and a small portion enters the second flow channel. The second aeration fluid generated by the second impeller enters the second flow channel, forming a second air-water mixture. Since the speed of the third air-water mixture in the third flow channel is greater than that in the second flow channel, and the two fluids move in different directions, the third air-water mixture flowing out of the third flow channel tilts and impacts the second air-water mixture, causing water droplets and bubbles to collide and mix violently within the second flow channel. This makes the water droplets and bubbles smaller and denser, continuously changing the movement path and direction of the air, transferring more oxygen to the water, forming a fourth air-water mixture. The fourth air-water mixture, sprayed from the second channel, is distributed circumferentially along the aeration disc on a vertical plane perpendicular to the second impeller axis, distributing oxygen to the surrounding water and achieving aeration in the Y and Z directions (the entire vertical plane). The first air-water mixture, sprayed from the first channel, is distributed circumferentially along the aeration disc and sprayed outwards towards the second impeller, achieving aeration in the X, Y, and Z directions (three-dimensional space). Simultaneously, on the plane containing the axis of each channel unit, the first air-water mixture sprayed inclined to the first impeller axis and the fourth air-water mixture sprayed perpendicular to the first impeller axis cut, collide, and mix with each other, making the water droplets and bubbles in the entire space smaller and denser, thus enhancing and balancing the dissolved oxygen effect throughout the space.

[0031] Preferably, the diameter of the second impeller is 0.7 to 0.9 times the diameter of the first impeller. The flow velocity of the steam-water mixture formed by the first impeller is greater than that of the steam-water mixture formed by the second impeller. Therefore, the steam-water mixture generated by the first impeller flows out through the third flow channel and impacts the steam-water mixture generated by the second impeller in the second flow channel.

[0032] Preferred, such as Figure 4As shown, the first impeller 4 includes an inner hub 42, an outer hub 46, and several first blades 45. The inner hub 42 and the outer hub 46 are coaxially connected by several ribs, and the several first blades 45 are arranged around the outer hub 46. The inner hub 42 has a first shaft hole 41 at its center, which is connected to the rotor shaft of the submersible pump 6. A fourth flow channel 44 is formed between the inner hub 42 and the outer hub 46 to ensure that the steam-water mixture flows to the second impeller 5, where it is then ejected at high speed under the action of the second impeller 5. The first blades are mixed-flow blades, generating fluid at a certain angle to the axis of the first impeller. The fluid flow direction is inclined in all directions and towards the second impeller, and is radial. Preferably, the inner hub 42 is frustum-shaped, with the end of the inner hub closer to the second impeller being the larger end. The outlet area of ​​the fourth flow channel 44 between the inner hub and the outer hub is smaller than the inlet area, increasing the velocity of the fluid flowing to the second impeller.

[0033] Preferably, both the inner wall of the outer hub and the outer wall of the inner hub are provided with a third spiral cutter 43. This cutter drives the air-water mixture in the aeration chamber to move rapidly through the fourth flow channel to the second impeller 5, simultaneously cutting the inner and outer rings of the air-water mixture in the fourth flow channel, making the water droplets and bubbles smaller and denser, thus increasing the dissolved oxygen efficiency. In the fourth flow channel 44, the air-water mixture, continuously transferring oxygen, constantly changes the radial position of the oxygen under the action of the inner and outer spiral cutters (the cross-sectional area of ​​the fourth flow channel gradually decreases), causing a further distribution of oxygen and filling the gaps in the air-water mixture with lower oxygen content. This continuous cutting and transfer further improves the dissolved oxygen efficiency.

[0034] like Figure 5 As shown, the second impeller 5 includes a second hub 52 and a second blade 53. The hub 52 has a second shaft hole 51 at its center, and the hub 52 is connected to the rotor shaft of the submersible pump 6 through the second shaft hole 51. The second blade 53 is a radial blade, which is arranged on the outer ring of the hub 52 to generate fluid perpendicular to the axis of the second impeller. The fluid is sprayed circumferentially along the second impeller.

[0035] Preferably, the inner hub of the first impeller has a plurality of concentrically arranged first annular cutting blades 47 on its end face near the second impeller 5. The second hub of the second impeller has a plurality of concentrically arranged second annular cutting blades 54 on its end face near the first impeller 4. When the first impeller 4 rotates, the first annular cutting blades 47 cut the water-air mixture on the right side of the first impeller, making the water droplets and bubbles smaller and denser, transferring more oxygen into the water to improve dissolved oxygen efficiency. When the second impeller rotates, the second annular cutting blades 54 cut the water-air mixture on the left side of the second impeller, making the water droplets and bubbles smaller and denser, transferring more oxygen into the water to improve dissolved oxygen efficiency.

[0036] As a preferred example, such as Figure 1As shown, the aeration chamber also includes a water jacket 2, which is positioned above the aeration disc 3. The water jacket 2 is fitted over the air inlet pipe 1, with its bottom end located at the upper opening of the aeration chamber. The top end of the water jacket 2 is below the liquid surface. As the first impeller 4 and the second impeller 5 rotate, water enters the cavity between the water jacket and the air inlet pipe through the top opening of the water jacket, and then flows downwards into the aeration chamber of the aeration disc. Preferably, the distance between the inner wall of the water jacket 2 and the outer wall of the air inlet pipe is 20–100 mm. The smaller cross-sectional area of ​​the cavity ensures a higher fluid velocity within the cavity, thereby creating a higher vacuum within the cavity, drawing more air into the cavity, and further increasing the amount of air entering the water.

[0037] Preferred, such as Figure 2 As shown, the water jacket includes a water distribution plate 21 and a sleeve, with the water distribution plate 21 positioned at the top of the sleeve. The water distribution plate 21 is a circular disc with a central opening, and its diameter D is 5 to 15 times the diameter of the air inlet pipe. The top surface of the water distribution plate 21 is 10 to 30 mm below the liquid surface height h. The larger water distribution plate and smaller distance h facilitate the entry of water near the liquid surface into the water jacket, increasing the amount of air-laden water flowing into the water jacket, thereby increasing the air intake. Furthermore, it prevents airless water below the water distribution plate from entering the water jacket, thus drawing more air from above the liquid surface into the clamping cavity to form a pre-steam-water mixture and increasing the air content in the pre-steam-water mixture, thereby increasing the aeration rate.

[0038] Preferably, the diameter of the sleeve gradually decreases from top to bottom, so that the cross-sectional area of ​​the cavity between the sleeve and the air inlet pipe gradually decreases from top to bottom, causing the flow rate of the pre-steam-water mixture in the cavity to gradually increase, continuously increasing the vacuum degree, and bringing more air into the pre-steam-water mixture in the cavity.

[0039] Preferably, the air inlet pipe has an air outlet 11 on its inner wall within the casing. When the first pre-steam-water mixture in the clamping cavity moves rapidly downwards, a partial vacuum is created, allowing air from the air inlet pipe to enter the clamping cavity through the air outlet 11, forming a second pre-steam-water mixture. As the fluid flows downwards, the flow velocity within the clamping cavity continuously increases, and the vacuum level increases further downwards, thereby continuously increasing the amount of air entering the clamping cavity through the air outlet, continuously increasing the air content of the second pre-steam-water mixture, and continuously improving the aeration effect. Within the clamping cavity, as the fluid flows downwards, the flow rate and velocity of air entering the clamping cavity from the air inlet pipe increase, and the direction of air entering the clamping cavity is perpendicular to the flow direction of the pre-steam-water mixture in the clamping cavity. The air continuously cuts and merges with the downward-flowing pre-steam-water mixture; the cutting force increases further downwards, making the water droplets and bubbles smaller and denser, continuously increasing the oxygen content of the second pre-steam-water mixture, and continuously improving the oxygen transfer efficiency.

[0040] Preferably, the outer wall of the air inlet pipe within the sleeve is provided with a first spiral cutter 12, and the inner wall of the sleeve is provided with a second spiral cutter 24. The second spiral cutter 24 continuously cuts the outer circumference of the downward-moving steam-water mixture, while the first spiral cutter 12 continuously cuts the inner circumference of the downward-moving pre-steam-water mixture, making the water droplets and bubbles smaller and denser, thus increasing the oxygen content in the pre-steam-water mixture and improving the dissolved oxygen efficiency. After being cut by the first spiral cutter 12 and the second spiral cutter 24, the pre-steam-water mixture continuously changes the position of oxygen in the circumference and radial direction, continuously increasing the oxygen transfer efficiency.

[0041] Preferred, such as Figure 3 As shown, the sleeve and the inlet pipe 1 are eccentrically positioned. The eccentricity e = 5~30mm. With the inlet pipe and sleeve configured as an eccentric structure, the gap between the inlet pipe and the sleeve varies at any cross-section at different heights, resulting in different downward flow velocities of the fluid and radial mixing. As the pre-steam-water mixture, after continuous spiral cutting and mixing, flows downwards, it further alters the circumferential and radial positions of oxygen in the mixture. Furthermore, the oxygen is continuously cut by the first and second spiral cutting bodies, achieving oxygen redistribution and cutting, thereby continuously improving oxygen transfer efficiency.

[0042] Preferably, the sleeve adopts a telescopic tube structure. The sleeve includes an upper tube 22 and a lower tube 23, with the lower part of the upper tube 22 sleeved over the upper part of the lower tube. The lower part of the upper tube 22 is provided with a vertically extending adjustment hole, and the upper part of the lower tube 23 is provided with several fixing holes spaced apart along the axial direction. The upper tube 22 can move up and down outside the lower tube 23. The telescopic adjustment of the sleeve is achieved by inserting fasteners into the adjustment holes and fixing holes for fixation. By using a telescopic sleeve, the distance between the top end face of the water distribution plate and the liquid surface can be adjusted, thereby ensuring that more air is brought into the water jacket and improving the overall aeration effect.

[0043] In the above embodiment, water enters the water jacket and then continuously flows into the aeration chamber. Under the action of the first and second impellers, it is sprayed into the water at high speed. A negative pressure is generated in the aeration chamber, drawing air in to mix with the fluid and form a steam-water mixture, which is then sprayed out at high speed, performing a centrifugal aeration process. Air enters the aeration chamber through two pathways. Firstly, as the water flows rapidly downwards through the water jacket, air near the liquid surface is drawn into the water jacket and mixes with the water to form a first pre-steam-water mixture. Secondly, air above the liquid surface enters the air inlet pipe through the top opening, and a small portion of the air enters the clamping cavity through the air outlet, mixing with the first pre-steam-water mixture to form a second pre-steam-water mixture. This second pre-steam-water mixture then enters the aeration chamber as the driving fluid for the first and second impellers. Most of the air enters the aeration chamber directly through the bottom opening of the air inlet pipe. In the aeration chamber, it mixes with the second pre-steam-water mixture to form a newer steam-water mixture, which is then sprayed into the water body under the action of the first and second impellers. This increases the pathway for air intake, effectively increasing the amount of air entering the water body and transferring more oxygen into the water, thus significantly improving dissolved oxygen efficiency.

[0044] The working process of the high-efficiency aerator in the above preferred embodiment is as follows:

[0045] Adjust the upper and lower pipes to adjust the distance between the top end face of the water distribution plate 11 and the liquid surface, ensuring that more air enters the jacket along with the surface water.

[0046] The first impeller 4 and the second impeller 5 rotate at high speed in the aeration chamber, spraying the fluid in the aeration chamber into the water body through the flow channel, forming a certain vacuum in the aeration chamber. The water body quickly enters the clamping chamber from the water distribution plate and then enters the aeration chamber. The air above the liquid surface enters the aeration chamber through the air inlet pipe 1.

[0047] As water flows rapidly downwards from the top opening of the water jacket, it draws air from near the liquid surface above the distribution plate into the clamping cavity, forming a first pre-steam-water mixture with the water. As the first pre-steam-water mixture moves rapidly downwards within the clamping cavity, a partial vacuum is created, allowing air from the air inlet pipe to enter the clamping cavity through the air outlet 11. This air dissolves in the first pre-steam-water mixture, forming a second pre-steam-water mixture. As the fluid flows downwards within the clamping cavity, the flow velocity and vacuum increase, leading to a greater flow rate and velocity of air entering the clamping cavity through the air outlet 11. The direction of air entry into the clamping cavity is perpendicular to the flow direction of the pre-steam-water mixture. The air continuously cuts and merges with the downward-flowing mixture. The cutting force increases as the mixture descends to the bottom of the air inlet pipe, resulting in smaller and denser water droplets and bubbles. This continuously increases the oxygen content of the second pre-steam-water mixture and improves oxygen transfer efficiency. The first helical cutter 12 and the second helical cutter 24 continuously cut the downward-moving steam-water mixture in the inner and outer circumferential directions, making the water droplets and bubbles smaller and denser. This results in the first and second pre-steam-water mixtures containing more oxygen, thus improving dissolved oxygen efficiency. After being helically cut by the first helical cutter 12 and the second helical cutter 24, the pre-steam-water mixture continuously changes the circumferential and radial positions of the oxygen, continuously increasing oxygen transfer efficiency. Furthermore, at any cross-section at different heights of the water jacket, the gap between the air inlet pipe and the jacket varies. As the pre-steam-water mixture flows downwards, it again changes the circumferential and radial positions of the oxygen, while simultaneously being continuously cut by the first and second helical cutters, achieving oxygen redistribution and cutting, continuously improving oxygen transfer efficiency.

[0048] The second pre-steam-water mixture enters the aeration chamber, serving as the driving fluid for the aerator and increasing the aeration rate. Most of the air in the intake pipe enters the aeration chamber directly through the bottom opening. The second pre-steam-water mixture and the air entering the aeration chamber through the bottom of the intake pipe mix and merge under the action of the first and second impellers, forming a new steam-water mixture, further improving oxygen transfer.

[0049] Under the action of the first impeller 4, a portion of the steam-water mixture forms a high-speed fluid. Most of it enters the first flow channel 31 to form the first steam-water mixture, while a small portion enters the third flow channel 33 to form the third steam-water mixture.

[0050] Part of the carbonated water mixture enters the fourth flow channel 44 of the first impeller. The third spiral cutter 43 on the inner wall of the outer hub 46 and the outer wall of the inner hub 42 drives the carbonated water mixture to move rapidly towards the second impeller 5, cutting the outer and inner rings of the mixture, making the water droplets and bubbles smaller and denser, thus increasing the dissolved oxygen efficiency. In the fourth flow channel 44, the carbonated water mixture, continuously transferring oxygen, constantly changes the radial position of the oxygen under the internal and external cutting action (the cross-sectional area of ​​the flow channel gradually decreases), causing a further distribution of oxygen and filling the gaps in the carbonated water mixture with lower oxygen content. This continuous cutting and transfer further improves the dissolved oxygen efficiency. The first annular cutter 47 and the second annular cutter 54 cut the carbonated water mixture between the first and second impellers, making the water droplets and bubbles smaller and denser, transferring more oxygen into the water to improve the dissolved oxygen efficiency.

[0051] The steam-water mixture generates a high-speed fluid under the action of the second impeller 5, which enters the second flow channel to form a second steam-water mixture.

[0052] The velocity of the third air-water mixture in the third channel is greater than that of the second air-water mixture in the second channel, and the two fluids move in different directions. Therefore, the third air-water mixture tilts and impacts the second air-water mixture in the second channel 32, causing water droplets and bubbles to collide and mix violently within the second channel, forming a fourth air-water mixture. This makes the water droplets and bubbles smaller and denser, continuously changing the movement path and direction of the air, transferring more oxygen to the water. The fourth air-water mixture sprayed from the second channel 32 is sprayed circumferentially along the aeration disc into the surrounding water in a vertical plane perpendicular to the horizontal axis, transferring oxygen to the water and achieving aeration in the Y and Z directions (the entire vertical plane). The first air-water mixture sprayed from the first channel is sprayed circumferentially outwards from the aeration disc and towards the second impeller, achieving aeration in the X, Y, and Z directions (three-dimensional space). At the same time, the first and fourth soda mixtures cut, collide and mix with each other, making the water droplets and bubbles in the entire space smaller and denser, thus enhancing and balancing the dissolved oxygen effect of the entire space.

[0053] This invention also provides an aeration method using the submersible aerator provided in the above embodiments. The aeration method includes:

[0054] The first and second impellers rotate synchronously in the aeration chamber, creating a vacuum. Air above the liquid surface enters the aeration chamber of the aeration disc through the air inlet pipe 1, and water enters the aeration chamber. The water and air mix and merge to form a steam-water mixture, which is then sprayed into the water body under the action of the first and second impellers.

[0055] Specifically, air above the liquid surface enters the aeration chamber of the aeration disc through air inlet pipe 1, and water enters the aeration chamber, including:

[0056] Water near the liquid surface enters the casing through the water distribution plate 21, continuously drawing water from the surrounding area into the casing, forming a first pre-steam-water mixture within the casing. Air above the liquid surface enters the air inlet pipe 1 through the opening at the top. A small portion of the air in the air inlet pipe enters the space between the casing and the air inlet pipe through the air outlet on the pipe wall, mixing with the first pre-steam-water mixture to form a second pre-steam-water mixture. As the second pre-steam-water mixture flows downwards, it continuously cuts and merges with the air entering the space between the casing and the air inlet pipe through the air outlet. Simultaneously, the first spiral cutter 12 and the second spiral cutter 24 continuously cut the downward-moving second pre-steam-water mixture in the inner and outer circumferential directions, making the water droplets and bubbles smaller and denser, and continuously changing the circumferential and radial positions of the bubbles, thus continuously increasing the oxygen transfer efficiency. The oxygen content of the second pre-steam-water mixture continuously increases, eventually entering the aeration chamber. Most of the air in the air intake pipe enters the aeration chamber through the opening at the bottom of the air intake pipe.

[0057] The carbonated water mixture is sprayed into the water body under the action of the first and second impellers, specifically including:

[0058] A portion of the air-water mixture forms the first aeration fluid under the action of the first impeller. Most of this first aeration fluid flows into the first channel to form the first air-water mixture, while a small portion flows into the third channel to form the third air-water mixture. Another portion of the air-water mixture forms the second aeration fluid under the action of the second impeller, flowing into the second channel to form the second air-water mixture. The third air-water mixture flows into the second channel and impacts the second air-water mixture, causing water droplets and bubbles to collide and mix within the second channel, forming the fourth air-water mixture. The first air-water mixture flowing out of the first channel is sprayed obliquely towards the aeration disc and the second impeller, with multiple streams of the first air-water mixture sprayed circumferentially along the aeration disc, achieving three-dimensional aeration. The fourth air-water mixture flowing out of the second channel is sprayed perpendicular to the axis of the second impeller, with multiple streams of the fourth air-water mixture sprayed circumferentially along the aeration disc, achieving vertical aeration. The first and fourth soda mixtures cut, collide, and mix with each other, making the water droplets and bubbles finer and enhancing the aeration effect in three dimensions.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the technical solution of the present invention, based on the technical essence of the present invention, shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A high efficiency aerator characterized by: The system includes an air inlet pipe (1), an aeration chamber, a submersible pump (6), and a base (7). The submersible pump (6) is horizontally mounted on the base (7), and the aeration chamber is located on the side of the submersible pump (6). The aeration chamber includes an aeration disc (3), which has an aeration cavity with an opening at the top. A first impeller (4) and a second impeller (5) are spaced horizontally within the aeration cavity. Both the first impeller (4) and the second impeller (5) are connected to the submersible pump (6), and the second impeller (5) is located between the first impeller (4) and the submersible pump (6). The aeration disc also has several flow channel units distributed along the circumference of the aeration cavity and communicating with the aeration cavity. Each flow channel unit includes a flow channel unit whose axis is located on the same side. A first flow channel (31), a second flow channel (32), and a third flow channel (33) are arranged in a plane; the inlet of the first flow channel and the inlet of the third flow channel are opposite to the first impeller (4), the inlet of the second flow channel is opposite to the second impeller (5), and the outlet of the third flow channel is connected to the second flow channel; the axis of the second flow channel is perpendicular to the axis of the second impeller, and there is an angle between the axis of the first flow channel and the axis of the first impeller; the diameter of the first impeller is larger than the diameter of the second impeller; the diameter of the third flow channel is smaller than the diameter of the first flow channel and the diameter of the second flow channel; the air inlet pipe (1) is arranged above the aeration plate, the top end of the air inlet pipe (1) is located above the liquid surface, and the bottom end of the air inlet pipe (1) is connected to the aeration chamber.

2. The high efficiency aerator of claim 1, wherein: The aeration chamber also includes a water jacket (2), which is positioned above the aeration disc (3); the water jacket (2) is fitted over the air inlet pipe (1), and its bottom end is located at the upper opening of the aeration chamber; the top end of the water jacket (2) is located below the liquid surface.

3. The high efficiency aerator of claim 2, wherein: The water jacket includes a water distribution plate (21) and a sleeve. The water distribution plate (21) is located at the top of the sleeve. The diameter of the sleeve gradually decreases from top to bottom. The air inlet pipe is located inside the sleeve and has an air outlet on the pipe wall.

4. The high efficiency aerator of claim 3, wherein: The sleeve and the air inlet pipe (1) are eccentrically positioned.

5. The high efficiency aerator of claim 3, wherein: The air intake pipe is provided with a first spiral cutter (12) on the outer wall inside the sleeve, and a second spiral cutter (24) is provided on the inner wall of the sleeve.

6. The high efficiency aerator of claim 3, wherein: The sleeve adopts a telescopic tube structure.

7. The high efficiency aerator of claim 1, wherein: The first impeller (4) includes an inner hub (42), an outer hub (46) and a plurality of first blades (45). The inner hub (42) and the outer hub (46) are coaxially connected by a plurality of ribs, and the plurality of first blades are arranged around the outer hub (46). The inner hub (42) is connected to the submersible pump (6). The inner hub (42) is frustum-shaped, and the end of the inner hub near the second impeller is the large end. The first blades are mixed-flow blades.

8. The high efficiency aerator of claim 7, wherein: The inner wall of the outer hub and the outer wall of the inner hub are both provided with a third spiral cutting body (43); the end face of the inner hub near the second impeller (5) is provided with a plurality of concentrically arranged first annular cutting blades (47); the end face of the second hub of the second impeller near the first impeller (4) is provided with a plurality of concentrically arranged second annular cutting blades (54).

9. An aeration method characterized by: The method employs the high-efficiency aerator described in any one of claims 1 to 8; the method includes: The first and second impellers rotate synchronously in the aeration chamber, forming a vacuum in the aeration chamber; the air above the liquid surface enters the aeration chamber of the aeration disc through the air inlet pipe (1), and the water enters the aeration chamber, where they mix and merge to form a steam-water mixture. The steam-water mixture is sprayed into the water body under the action of the first and second impellers. The process involves spraying the steam-water mixture into the water body under the action of the first and second impellers, specifically including: A portion of the steam-water mixture forms the first aeration fluid under the action of the first impeller. Most of the first aeration fluid flows into the first channel to form the first steam-water mixture, while a small portion flows into the third channel to form the third steam-water mixture. Another portion of the steam-water mixture forms the second aeration fluid under the action of the second impeller. The second aeration fluid flows into the second channel to form the second steam-water mixture. The third steam-water mixture flows into the second channel and impacts the second steam-water mixture, causing water droplets and bubbles to collide and mix within the second channel, forming the fourth steam-water mixture. The first steam-water mixture flowing out of the first channel is sprayed obliquely towards the outside of the aeration disc and towards the second impeller. Multiple streams of the first steam-water mixture are sprayed out circumferentially along the aeration disc, achieving aeration in three-dimensional space. The fourth steam-water mixture flowing out of the second channel is sprayed in a direction perpendicular to the axis of the second impeller. Multiple streams of the fourth steam-water mixture are sprayed out circumferentially along the aeration disc, achieving aeration on the vertical plane. The first and fourth steam-water mixtures cut, collide, and mix with each other, making the water droplets and bubbles finer and enhancing the aeration effect in three-dimensional space.

10. The aeration method according to claim 9, characterized in that: Air above the liquid surface enters the aeration chamber of the aeration disc through the air inlet pipe (1), and water enters the aeration chamber, specifically including: Water near the liquid surface enters the casing through the water distribution plate (21), driving air near the surrounding liquid surface to continuously enter the casing through the water distribution plate (21), forming a first pre-steam-water mixture inside the casing; air above the liquid surface enters the air inlet pipe (1) through the opening at the top of the air inlet pipe (1), and a small portion of the air inside the air inlet pipe enters the space between the casing and the air inlet pipe through the air outlet on the pipe wall, mixing with the first pre-steam-water mixture to form a second pre-steam-water mixture; as the second pre-steam-water mixture flows downward, it continuously mixes with the air entering the casing through the air outlet. The air between the air inlet pipes is cut and mixed together; at the same time, the first spiral cutter (12) and the second spiral cutter (24) continuously cut the second pre-steam water mixture moving downward in the inner and outer circumferential directions, making the water droplets and bubbles smaller and denser, and continuously changing the position of the bubbles in the circumference and radial direction, continuously increasing the oxygen transfer efficiency; the oxygen content of the second pre-steam water mixture continuously increases, and finally enters the aeration chamber; most of the air in the air inlet pipe enters the aeration chamber through the opening at the bottom of the air inlet pipe.

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