An aeration head, aeration equipment and aeration method for generating enhanced microbubbles

Abstract

The present invention provides an aeration head for generating enhanced microbubbles. The aeration head includes an aeration branch pipe for admitting external gas, an air-water separation pipe for admitting air-dissolved water, an aeration diaphragm, an inner microbubble generation chamber, an outer aeration chamber, and an adjustment mechanism. The inner microbubble generation chamber is configured to receive the air-dissolved water from the air-water separation pipe and generate microbubbles from the air-dissolved water by the method of air-dissolved gas release, and the microbubbles are discharged through the aeration diaphragm. The outer aeration chamber is configured to receive the gas from the aeration branch pipe and discharge the gas through the aeration diaphragm. The adjustment mechanism is configured to adjust the amount of gas flowing from the outer aeration chamber to the inner microbubble generation chamber. By combining dissolved gas release with direct aeration, the present invention can generate a sufficient amount of microbubbles, solving the problems of small aeration volume during the current dissolved gas release process and large bubbles generated by direct aeration, resulting in poor bubble mass transfer and poor dissolved oxygen effect.

Description

Technical Field

[0001] The present invention relates to the field of wastewater treatment, and particularly to an aeration head, an aeration device and an aeration method for generating enhanced microbubbles. Background Art

[0002] The biological method has the advantages of being environmentally friendly, having high removal efficiency, and strong ability to remove refractory pollutants, and is currently often used in the treatment of domestic sewage and various industrial wastewaters. The biological method includes aerobic method, anaerobic method, biological enzyme method, etc. Among them, the aerobic method is applied to the treatment of various water bodies due to its high treatment efficiency, few restrictions and wide application. The core of the aerobic method is aeration. By aeration, the dissolved oxygen content in the wastewater is increased, and then the activity of microorganisms in the water is improved, providing conditions for decomposing organic matter. The aeration process can also play a disturbing role, so that the organic matter, microorganisms and dissolved oxygen are fully mixed to improve the removal efficiency. Existing traditional aeration devices generally aerate by a single direct air-blowing method, and control the aeration volume and bubble size by controlling the pore size and the power of the blower. Prolonged aeration is likely to cause partial blockage of some aeration holes, and pollutants deposit inside the pipe, resulting in uneven aeration volume and relatively large generated bubbles, which in turn lead to low mass transfer efficiency, low dissolved oxygen content, high energy consumption and low efficiency in the aeration process, and poor removal effect. After long-term use, the aeration device is prone to aging and blockage, and the equipment use cost is relatively high.

[0003] Compared with ordinary bubbles generated by air-blowing aeration, the microbubbles generated by the air dissolution and gas release method have the advantages of large specific surface area, long residence time, high mass transfer efficiency, uniform aeration, and being rich in strongly oxidizing free radicals. However, the amount of microbubbles generated by a single air dissolution and gas release method is small, and it is not possible to efficiently generate a sufficient amount of microbubbles.

[0004] On the other hand, the existing aeration devices have a low degree of intelligence. The aeration process requires manual monitoring and operation to control the aeration device to adjust the aeration volume, which consumes a large amount of manpower. Summary of the Invention

[0005] Object of the Invention: The technical problem to be solved by the present invention is to provide an aeration head for generating enhanced microbubbles in view of the deficiencies of the prior art.

[0006] To solve the above technical problems, the present invention provides an aeration head for generating enhanced microbubbles, which includes an aeration branch pipe for introducing external gas, an air-water separation pipe for introducing air-dissolved water, an aeration membrane, an inner microbubble generation chamber, an outer aeration chamber, and an adjustment mechanism. The inner microbubble generation chamber is configured to receive the air-dissolved water from the air-water separation pipe and generate microbubbles from the air-dissolved water by the method of air-dissolved gas release, and the microbubbles are discharged through the aeration membrane. The outer aeration chamber is configured to receive the gas from the aeration branch pipe and discharge the gas through the aeration membrane. The adjustment mechanism is configured to adjust the amount of gas flowing from the outer aeration chamber to the inner microbubble generation chamber.

[0007] In some embodiments, the aeration head includes an internal support member and a mixed aeration pipe. The internal support member is fixedly installed inside the aeration head. The mixed aeration pipe penetrates through the internal support member. The internal support member and the mixed aeration pipe divide the interior of the aeration head into an inner microbubble generation chamber and an outer aeration chamber. A communication port for communicating the inner microbubble generation chamber and the outer aeration chamber is formed on the side wall of the mixed aeration pipe. The adjustment mechanism includes a movable outer pipe movably sleeved outside the mixed aeration pipe for blocking the communication port, and the movable outer pipe can reciprocate along the mixed aeration pipe to adjust the area of the lower part of the movable outer pipe blocking the communication port.

[0008] In some embodiments, the adjustment mechanism further includes a baffle and a return spring. The baffle is installed at the lower part of the movable outer pipe, and the gas output from the aeration branch pipe faces the lower part of the baffle. The return spring is located between the mixed aeration pipe and the internal support member, and the movable outer pipe is connected to the internal support member through the return spring. When the amount of gas output from the aeration branch pipe is increased, the pressure exerted by the gas output from the aeration branch pipe on the baffle increases, and the movable outer pipe moves along the mixed aeration pipe towards the aeration membrane under the action of the gas pressure and compresses the return spring. When the amount of gas output from the aeration branch pipe is decreased, the pressure exerted by the gas output from the aeration branch pipe on the baffle decreases, and the movable outer pipe moves in the direction away from the aeration membrane under the resilience of the return spring. When the pressure exerted by the gas output from the aeration branch pipe on the baffle is balanced with the resilience exerted by the return spring on the movable outer pipe, the movable outer pipe is in a stable position.

[0009] Thus, by continuously adjusting the amount of gas output from the aeration branch pipe in the present application, the area of the lower part of the movable outer pipe blocking the communication port can be continuously adjusted.

[0010] In some embodiments, the aeration head further includes a backwashing pipeline. One end of the backwashing pipeline passes through the outer aeration chamber and the internal support and extends to the outer sidewall of the movable outer pipe. The sidewall of the movable outer pipe is provided with outer pipe backwashing holes, and the sidewall of the mixed aeration pipeline is provided with inner pipe backwashing holes. When the gas volume output by the aeration branch pipe reaches the maximum value, the movable outer pipe moves upward to the position where the return spring is completely compressed, and the inner pipe backwashing holes, the outer pipe backwashing holes, and the backwashing pipeline are sequentially communicated.

[0011] In some embodiments, the aeration diaphragm is a double-layer aeration diaphragm, and the micropore positions on the two layers of the double-layer aeration diaphragm are staggered with each other.

[0012] In some embodiments, the mixed aeration pipeline is communicated with the gas-water branch pipe through a decompression hole, and the gas-dissolved water from the gas-water branch pipe releases microbubbles to the mixed aeration pipeline through the decompression hole; the decompression hole is located below the circulation port.

[0013] The present invention also provides an aeration device for generating enhanced microbubbles. The aeration device includes the above-mentioned aeration head for generating enhanced microbubbles, a double-suction pump, a dissolved air tank, an air pump, a water distribution pipe, an air distribution pipe, a dissolved oxygen meter, and a controller. The one or more aeration heads are located at the bottom of the water body in the aeration tank. The double-suction pump is provided with a first water inlet, a second water inlet, and a water outlet. The double-suction pump is used to pump external gas from the first water inlet of the double-suction pump to the water outlet of the double-suction pump and pump the upper pool water in the aeration tank from the second water inlet of the double-suction pump to the water outlet of the double-suction pump, so as to form gas-water effluent in this way. The input end of the dissolved air tank is communicated with the water outlet of the double-suction pump and is used to receive the gas-water effluent. The output end of the dissolved air tank is communicated with the gas-water branch pipes of each aeration head through a water distribution pipe and is used to transport the gas-dissolved water from the output end of the dissolved air tank to each aeration head. The air pump is used to pump external gas from the air inlet of the air pump to the air outlet of the air pump, and the air outlet of the air pump is communicated with the aeration branch pipes of each aeration head through an air distribution pipe. The dissolved oxygen meter is located in the water body of the aeration tank and is used to monitor the dissolved oxygen content in the water body of the aeration tank. The double-suction pump, the air pump, and the dissolved oxygen meter are respectively electrically connected to the controller, and the controller controls the start and stop of the double-suction pump, the start and stop of the air pump, and the air intake of the air pump based on the measured value from the dissolved oxygen meter.

[0014] In some embodiments, the aeration device further includes a filter and a first pipeline. The filter is located in the upper part of the water body in the aeration tank, and the second water inlet of the double-suction pump is communicated with the filter through the first pipeline.

[0015] In some embodiments, the aeration device further includes a first air inlet pipe, a second air inlet pipe, and a check valve. The first water inlet of the double-suction pump is communicated with external gas through the first air inlet pipe. The air inlet of the air pump is communicated with external gas through the second air inlet pipe. The first check valve is located on the first pipeline.

[0016] The present invention provides an aeration method for generating enhanced microbubbles. This method is implemented by using the above-mentioned aeration device for generating enhanced microbubbles and includes the following steps:

[0017] Start the double-suction pump, and the external gas and the upper pool water in the aeration tank form air-water effluent through the double-suction pump. The air-water effluent forms air-dissolved water through the dissolved air tank. The air-water branch pipe of the aeration head receives the air-dissolved water, and the air-dissolved water forms microbubbles through the pressure-reducing holes of the aeration head. The microbubbles sequentially pass through the inner microbubble generation chamber and the aeration diaphragm and enter the water body in the aeration tank to increase the dissolved oxygen content in the water body.

[0018] Start the air pump, and the external gas is pumped to the aeration branch pipe of the aeration head. The gas output from the aeration branch pipe of the aeration head is directed towards the lower part of the baffle. By adjusting the air intake of the air pump, the area of the lower part of the movable outer pipe blocking the flow port is adjusted, so as to adjust the amount of gas flowing from the outer aeration chamber to the inner microbubble generation chamber, including: when increasing the air intake of the air pump, the gas output from the aeration branch pipe drives the movable outer pipe to move upward along the mixed aeration pipeline by means of the baffle, reducing the area of the lower part of the movable outer pipe blocking the flow port, and being used to increase the amount of gas flowing from the outer aeration chamber to the inner microbubble generation chamber. When reducing the air intake of the air pump, the gas output from the aeration branch pipe drives the movable outer pipe to move downward along the mixed aeration pipeline by means of the baffle, increasing the area of the lower part of the movable outer pipe blocking the flow port, and being used to reduce the amount of gas flowing from the outer aeration chamber to the inner microbubble generation chamber. The gas flowing from the outer aeration chamber to the inner microbubble generation chamber agitates the inner microbubble generation chamber to generate more microbubbles, and the amount of microbubbles in the inner microbubble generation chamber is adjusted by adjusting the air intake of the air pump.

[0019] Furthermore, an aeration method for generating enhanced microbubbles provided by the present invention further includes the following steps:

[0020] The double-suction pump and the air pump are turned on and the air intake of the air pump is adjusted to the maximum value. The movable outer tube moves upward to the position where the return spring is fully compressed. The inner tube backwash hole, the outer tube backwash hole and the backwash pipeline are connected in sequence. The double-suction pump is controlled to switch between the on state and the off state. The microbubbles sprayed from the pressure reducing hole of the aeration head and the gas flowing from the outer aeration cavity to the inner microbubble generating cavity are mixed and impact the inner wall of the inner microbubble generating cavity. The gas-water mixture containing the pollutants on the inner wall of the inner microbubble generating cavity is discharged from the backwash pipeline.

[0021] Beneficial effects:

[0022] (1) The aeration head of the present invention allows the outer aeration chamber to be directly aerated by providing an outer aeration chamber to connect the aeration branch pipe and the aeration membrane; allows the inner microbubble generating chamber to be aerated by the gas-dissolution gas release method by providing an air-water branch pipe to connect the inner microbubble generating chamber and the aeration membrane; and adjusts the amount of gas flowing from the outer aeration chamber to the inner microbubble generating chamber by providing an adjusting mechanism. When the outer aeration chamber is connected to the inner microbubble generating chamber, the gas flowing from the aeration branch pipe to the inner microbubble generating chamber disturbs the inner microbubble generating chamber, thereby generating more microbubbles in the inner microbubble generating chamber and increasing the gas-water ratio of the gas-water mixture in the inner microbubble generating chamber. Compared with a single dissolved gas release method, the aeration head of the present application generates more microbubbles; compared with a single direct aeration method, the aeration head of the present application generates a sufficient amount of microbubbles, which solves the problem that the current dissolved gas release process has a small aeration volume and the direct aeration method generates larger bubbles, resulting in poor bubble mass transfer and poor dissolved oxygen effect.

[0023] (2) In some embodiments of the present application, an inner support member and a mixing aeration pipe are used to separate the interior of an aeration head into an inner microbubble generating chamber and an outer aeration chamber, and a flow port for connecting the inner microbubble generating chamber and the outer aeration chamber is opened on the side wall of the mixing aeration pipe. A movable outer tube is movably sleeved on the outside of the mixing aeration pipe for blocking the flow port. The movable outer tube can move back and forth along the mixing aeration pipe to adjust the area of ​​the flow port blocked by the lower part of the movable outer tube, thereby adjusting the amount of gas flowing from the outer aeration chamber to the inner microbubble generating chamber, thereby allowing the amount of microbubbles generated in the inner microbubble generating chamber to be adjusted.

[0024] (3) Some embodiments of the present application drive the movable outer tube to move along the mixing aeration pipe by arranging a baffle at the lower part of the movable outer tube and making the gas output from the aeration branch pipe face the lower part of the baffle, so as to drive the movable outer tube to move along the mixing aeration pipe by means of the pressure of the gas output from the aeration branch pipe on the baffle; by arranging a return spring between the mixing aeration pipe and the internal support member, the return spring connecting the movable outer tube and the internal support member; when the gas output from the aeration branch pipe increases, the pressure of the gas output from the aeration branch pipe applied to the baffle increases, and the movable outer tube moves along the mixing aeration pipe towards the aeration diaphragm under the action of the gas pressure and compresses the return spring; when the gas output from the aeration branch pipe decreases, the pressure of the gas output from the aeration branch pipe applied to the baffle decreases, and the movable outer tube moves in the direction away from the aeration diaphragm under the resilience of the return spring; when the force applied by the gas output from the aeration branch pipe on the baffle is balanced with the force applied by the return spring on the movable outer tube, the position of the movable outer tube is stable. The adjustment mechanism of this embodiment controls the displacement of the movable outer tube along the mixing aeration pipe by means of the gas output from the aeration branch pipe, that is, controls the area of the lower part of the movable outer tube covering the flow port, so as to adjust the amount of the gas output from the aeration branch pipe flowing into the inner microbubble generation chamber, and further adjust the generation amount of microbubbles in the inner microbubble generation chamber.

[0025] (4) The aeration diaphragm of some embodiments of the present application adopts a double-layer aeration diaphragm, and the micropore positions on the two diaphragms of the double-layer aeration diaphragm are staggered; when the aeration head is in a non-working state, the two diaphragms of the double-layer aeration diaphragm are attached to each other by their own elasticity, so that external sewage, sludge and other impurities cannot enter the inside of the aeration head; when the aeration head is in a working state, the two diaphragms of the double-layer aeration diaphragm are separated, so that the substances inside the aeration head can be discharged from the micropores.

[0026] (5) In some embodiments of the present application, by providing a backwashing pipeline penetrating through the outer aeration chamber and the internal support member, an outer pipe backwashing hole opened on the side wall of the movable outer pipe, and an inner pipe backwashing hole opened on the side wall of the mixed aeration pipeline, when the gas volume output by the aeration branch pipe is increased to the maximum value, the return spring is in a fully compressed position, and the inner pipe backwashing hole, the outer pipe backwashing hole, and the backwashing pipeline are sequentially connected; a large amount of gas flowing from the aeration branch pipe into the inner microbubble generation chamber is mixed with the gas-water mixture in the inner microbubble generation chamber and then impacts the inner wall of the inner microbubble generation chamber and entangles attachments such as sludge and microorganisms from the inner wall of the inner microbubble generation chamber; when the gas volume output by the aeration branch pipe reaches the maximum output value, the internal pressure in the inner microbubble generation chamber is greater than the external water pressure, and at the same time, due to the resistance of the aeration diaphragm to the discharge of the gas-water mixture, under the action of the internal pressure, the gas-water mixture entraining attachments such as sludge and microorganisms is discharged sequentially through the inner pipe backwashing hole, the outer pipe backwashing hole, and the backwashing pipeline; by intermittently supplying aerated water to the gas-water branch pipe to form a disturbance inside the inner microbubble generation chamber, so that attachments such as sludge and microorganisms are more easily discharged into the water body along with the gas-water mixture. Through the above process, the aeration head of the present application realizes the reverse flushing and cleaning function.

[0027] (6) The present application can adjust the aeration mode of the aeration head of the present application by controlling whether the gas-water branch pipe inputs aerated water into the inner microbubble generation chamber, whether the aeration branch pipe transports external gas to the outer aeration chamber, and adjusting the amount of external gas transported to the outer aeration chamber; when the gas-water branch pipe inputs aerated water into the inner microbubble generation chamber and the aeration branch pipe does not transport external gas to the outer aeration chamber, the aeration head is in the aerated water releasing mode; when the gas-water branch pipe does not input aerated water into the inner microbubble generation chamber and the aeration branch pipe transports external gas to the outer aeration chamber, the aeration head is in the direct aeration mode; when the gas-water branch pipe inputs aerated water into the inner microbubble generation chamber and the aeration branch pipe transports external gas to the outer aeration chamber but does not transport the maximum gas volume, the aeration head is in the mixed aeration mode; when the aeration branch pipe transports external gas to the outer aeration chamber and outputs the maximum gas volume, and the gas-water branch pipe intermittently inputs aerated water into the inner microbubble generation chamber, the aeration head is in the reverse flushing mode.

[0028] (7) The aeration equipment provided by this application can control the start and stop of the double-suction pump, the start and stop of the air pump, and the air intake of the air pump based on the measurement value from the dissolved oxygen meter by the controller, and then adjust the aeration mode of the aeration equipment: when the controller controls the double-suction pump to start and the air pump to stop, the aeration equipment is in the air dissolution and gas release mode; when the controller controls the double-suction pump to stop, the air pump to start and not output the maximum gas volume, the aeration equipment is in the direct aeration mode; when the controller controls the double-suction pump to start, the air pump to start and not output the maximum gas volume, the aeration equipment is in the mixed aeration mode; when the controller controls the air pump to start and output the maximum gas volume, and the double-suction pump switches between start and stop, the aeration equipment is in the reverse flushing mode; on the one hand, the aeration equipment of this application can increase the aeration volume of microbubbles and make up for the possible shortage of microbubble aeration volume in the dissolved air flotation method; on the other hand, it can change the aeration mode according to the change of dissolved oxygen content in the aeration tank, optimize the aeration process, and save energy consumption.

[0029] (8) The aeration equipment of this application controls the start and stop of the double-suction pump, the start and stop of the air pump, and the air intake of the air pump based on the measurement value from the dissolved oxygen meter by setting the controller, reducing manual operation, and at the same time, the dissolved oxygen situation in the water can be monitored in real time through the dissolved oxygen meter.

[0030] (9) The aeration equipment of this application pumps the external gas from the first water inlet of the double-suction pump to the water outlet of the double-suction pump and pumps the upper pool water in the aeration tank from the second water inlet of the double-suction pump to the water outlet of the double-suction pump. In this way, gas-water effluent is formed, and the gas-water effluent returns to the bottom of the aeration tank through the dissolved air flotation process, thereby realizing sewage reflux, forming an external circulation process, and prolonging the residence time of the water treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The following further describes the present invention in detail with reference to the drawings and specific embodiments, and the above and / or other advantages of the present invention will become clearer.

[0032] Figure 1 Stereo schematic of an aeration head for generating enhanced microbubbles provided for an embodiment of the present invention Figure 1 ;

[0033] Figure 2 For Figure 1 Top view of the aeration head shown;

[0034] Figure 3 For Figure 1 Stereo schematic of the aeration head shown Figure 2 ;

[0035] Figure 4 For Figure 1 Cross-sectional view of the aeration head shown;

[0036] Figure 5 is Figure 1 a schematic structural view of the inside of the aeration head shown;

[0037] Figure 6 is an aeration device using Figure 1 a schematic structural view of the aeration head shown. Specific embodiments

[0038] The reference numerals of the present invention are as follows:

[0039] Aeration tank 000, aeration head 100, aeration branch pipe 110, gas-water separation pipe 120, aeration membrane 130, aeration head housing 140, internal support member 150, backwash pipe 151, mixed aeration pipe 160, decompression hole 161, circulation port 162, inner pipe backwash hole 163, internal chamber 170, inner layer microbubble generation chamber 171, outer layer aeration chamber 172, outer pipe backwash hole 183, adjustment mechanism 190, baffle 191, return spring 192, movable outer pipe 193, double suction pump 200, first water inlet 210, second water inlet 220, water outlet 230, first air inlet pipe 240, dissolved air tank 300, input end 310, output end 320, air pump 400, air inlet 410, air outlet 420, second air inlet pipe 430, water distribution pipe 500, air distribution pipe 600, dissolved oxygen meter 700, controller 800, filter 900, first pipeline 910, first check valve 920.

[0040] The technical solutions of the present application will be described in detail below with reference to the accompanying drawings.

[0041] The single direct air-blowing method controls the amount of aeration and the size of bubbles by controlling the aperture size and the power of the blower. Due to the influence of the aperture size, the bubbles generated by the single direct air-blowing method are relatively large, and after long-term aeration, some holes are easily blocked, and the gas cannot cover the entire top of the aeration head, resulting in uneven aeration volume, and further leading to problems such as low mass transfer efficiency, low dissolved oxygen content, high energy consumption and low efficiency in the aeration process, and poor removal effect. Compared with the ordinary bubbles generated by air-blowing aeration, the microbubbles generated by the air dissolution and gas release method have the advantages of large specific surface area, long residence time, high mass transfer efficiency, uniform aeration, and rich in strongly oxidizing free radicals. However, because the air dissolution and gas release method requires pressurization to dissolve the gas in water, the whole process is discontinuous, resulting in a small amount of microbubbles generated by a single air dissolution and gas release method, and it is impossible to efficiently generate a sufficient amount of microbubbles.

[0042] As Figures 1 to 4As shown in the figure, the present application provides an aeration head for generating enhanced microbubbles. The aeration head 100 can be installed at the bottom of the water body in the aeration tank 000. The aeration head 100 is generally in the shape of a shower head, and the outer wall radian is 90° to 145°. The aeration head 100 includes an aeration branch pipe 110 for introducing external gas, an air-water branch pipe 120 for introducing air-dissolved water, an aeration diaphragm 130, an inner microbubble generation chamber 171, an outer aeration chamber 172, and an adjustment mechanism 190. The inner microbubble generation chamber 171 is used to receive the air-dissolved water from the air-water branch pipe 120 and generate microbubbles from the air-dissolved water by the air-dissolved gas release method. The microbubbles are discharged through the aeration diaphragm 130. The outer aeration chamber 172 is used to receive the gas from the aeration branch pipe 110 and discharge the gas through the aeration diaphragm 130. The adjustment mechanism 190 is used to adjust the amount of gas flowing from the outer aeration chamber 172 to the inner microbubble generation chamber 171. In the present application, the external gas can be external air.

[0043] The aeration head of the present invention allows the outer aeration chamber 172 to perform direct aeration by providing the outer aeration chamber 172 to connect the aeration branch pipe 110 and the aeration diaphragm 130. By providing the air-water branch pipe 120 to connect the inner microbubble generation chamber 171 and the aeration diaphragm 130, the inner microbubble generation chamber 171 is allowed to perform air-dissolved gas release method aeration. By providing the adjustment mechanism 190 to adjust the amount of gas flowing from the outer aeration chamber 172 to the inner microbubble generation chamber 171, when the outer aeration chamber 172 is connected to the inner microbubble generation chamber 171, the gas flowing from the aeration branch pipe 110 to the inner microbubble generation chamber 171 disturbs the inner microbubble generation chamber 171, so that more microbubbles are generated in the inner microbubble generation chamber 171, and the gas-water ratio of the gas-water mixture in the inner microbubble generation chamber 171 is increased. Compared with the single dissolved gas release method, the aeration head 100 of the present application generates more microbubbles. Compared with the single direct aeration method, the aeration head 100 of the present application generates a sufficient amount of microbubbles, solving the problems of small aeration volume in the current dissolved gas release process and large bubbles generated by the direct aeration method, resulting in poor bubble mass transfer and poor dissolved oxygen effect.

[0044] In some embodiments, as Figure 4 shown, the mixed aeration pipeline 160 is connected to the air-water branch pipe 120 through a pressure reducing hole 161. The air-dissolved water from the air-water branch pipe 120 releases microbubbles to the mixed aeration pipeline 160 through the pressure reducing hole 161. The pressure reducing hole 161 is located below the flow port 162. In some examples, the value range of the aperture of the pressure reducing hole 161 is 500-1500 μm. The size range of the microbubbles generated by the dissolved gas water passing through the pressure reducing hole 161 is 0.5-2 mm.

[0045] In some embodiments, the aeration head 100 includes an internal support member 150 and a mixed aeration pipe 160. The internal support member 150 is fixedly installed inside the aeration head 100. The mixed aeration pipe 160 penetrates through the internal support member 150. The internal support member 150 and the mixed aeration pipe 160 divide the interior of the aeration head 100 into an inner microbubble generation chamber 171 and an outer aeration chamber 172. A communication port 162 for communicating the inner microbubble generation chamber 171 and the outer aeration chamber 172 is formed on the side wall of the mixed aeration pipe 160. The adjustment mechanism 190 includes a movable outer pipe 193 that is movably sleeved outside the mixed aeration pipe 160 for blocking the communication port 162. The movable outer pipe 193 can reciprocate along the mixed aeration pipe 160 to adjust the area of the lower part of the movable outer pipe 193 that blocks the communication port 162.

[0046] When the movable outer pipe 193 blocks the communication port 162, by inputting dissolved air water into the gas-water manifold 120, the dissolved air water releases microbubbles through the pressure relief holes 161, and the microbubbles are discharged after passing through the inner microbubble generation chamber 171 and the aeration diaphragm 130, that is, aeration is completed by the dissolved air release method in the inner microbubble generation chamber 171.

[0047] When the aeration branch pipe 110 outputs gas and the movable outer pipe 193 moves upward along the mixed aeration pipe 160 to expose the communication port 162, the outer aeration chamber 172 communicates with the inner microbubble generation chamber 171, and the gas flowing from the aeration branch pipe 110 to the inner microbubble generation chamber 171 disturbs the inner microbubble generation chamber 171, thereby generating more microbubbles in the inner microbubble generation chamber 171 and increasing the gas-water ratio of the gas-water mixture in the inner microbubble generation chamber 171. Compared with the single aeration completed by the dissolved air release method, the above process combines the direct aeration method and the dissolved air release method, generating more microbubbles. At the same time, in the present application, by adjusting the amount of gas output by the aeration branch pipe 110 or adjusting the displacement of the movable outer pipe 193 along the mixed aeration pipe 160, that is, controlling the area of the lower part of the movable outer pipe 193 that blocks the communication port 162, the amount of gas flowing from the aeration branch pipe 110 to the inner microbubble generation chamber 171 can be adjusted, and thus the generation amount of microbubbles in the inner microbubble generation chamber 171 can be controlled.

[0048] In some examples, the communication port 162 is an elliptical hole, the length of the major axis of the elliptical hole is 0.5 cm, and the length of the minor axis is 0.2 cm. In some examples, the number of the communication ports 162 ranges from 3 to 5, and these communication ports 162 are evenly distributed along the circumferential direction of the mixed aeration pipe 160.

[0049] Specifically, as Figure 4As shown, the aeration diaphragm 130 is located at the top of the aeration head 100. The aeration diaphragm 130 is connected to the aeration head housing 140 of the aeration head 100 to form the internal chamber 170 of the aeration head 100. The internal support member 150 is fixedly installed inside the internal chamber 170, and the outer peripheral edge of the internal support member 150 is connected to the aeration diaphragm 130. The internal support member 150 and the mixed aeration pipe 160 divide the internal chamber 170 of the aeration head 100 to form an inner microbubble generation chamber 171 and an outer aeration chamber 172. The inner surface of the inner microbubble generation chamber 171 includes the outer surface of the top of the internal support member 150, the inner surface of the aeration diaphragm 130, and the inner wall surface of the mixed aeration pipe 160. The inner wall of the outer aeration chamber 172 includes the outer surface of the side wall of the internal support member 150, the inner surface of the aeration diaphragm 130, the inner wall surface of the aeration head housing 140, and a part of the outer wall surface of the mixed aeration pipe 160.

[0050] In some embodiments, as Figure 4 and Figure 5 shown, the adjustment mechanism 190 further includes a baffle 191 and a return spring 192. The baffle 191 is installed at the lower part of the movable outer tube 193, and the gas output from the aeration branch pipe 110 faces the lower part of the baffle 191. The return spring 192 is located between the mixed aeration pipe 160 and the internal support member 150, and the movable outer tube 193 is connected to the internal support member 150 through the return spring 192. When the gas volume output from the aeration branch pipe 110 increases, the pressure exerted by the gas output from the aeration branch pipe 110 on the baffle 191 increases, and the movable outer tube 193 moves along the mixed aeration pipe 160 towards the aeration diaphragm 130 under the action of the gas pressure and compresses the return spring 192. When the gas volume output from the aeration branch pipe 110 decreases, the pressure exerted by the gas output from the aeration branch pipe 110 on the baffle 191 decreases, and the movable outer tube 193 moves in the direction away from the aeration diaphragm 130 under the action of the return spring 192. When the force exerted by the gas output from the aeration branch pipe 110 on the baffle 191 is balanced with the force exerted by the return spring 192 on the movable outer tube 193, the position of the movable outer tube 193 is stable, so that the amount of microbubbles output by the aeration head 100 is kept stable, and further allows the aeration head 100 provided in this embodiment to continuously adjust the amount of microbubbles output by the aeration head 100 by continuously adjusting the amount of gas output from the aeration branch pipe 110.

[0051] In this embodiment, the adjustment mechanism 190 controls the displacement amount of the movable outer tube 193 along the mixed aeration pipe 160 by means of the gas output from the aeration branch pipe 110, that is, controls the area size of the lower part of the movable outer tube 193 covering the flow port 162, so as to adjust the amount of gas output from the aeration branch pipe 110 flowing into the inner microbubble generation chamber 171, and further adjust the generation amount of microbubbles in the inner microbubble generation chamber 171.

[0052] In some examples, the baffle 191 and the movable outer pipe 193 can be made of PP plastic. The return spring 192 is made of corrosion-resistant stainless steel material. In some examples, a limiting portion for supporting the movable outer pipe 193 is provided at the lower part of the outer wall of the mixed aeration pipe 160. When the aeration branch pipe 110 does not output gas, the return spring 192 is in a natural state, and the limiting portion is in contact connection with the bottom of the movable outer pipe 193.

[0053] In some embodiments, as Figures 3 to 5 shown, the aeration diaphragm 130 can be a double-layer aeration diaphragm. The micropore positions on the two layers of the aeration diaphragm 130 are staggered. When the aeration head is in a non-working state, the two layers of the aeration diaphragm 130 are attached to each other by their own elasticity, so that external sewage, sludge and other impurities cannot enter the inner microbubble generation chamber 171 and the outer aeration chamber 172. When the aeration head is in a working state, the two layers of the aeration diaphragm 130 are separated, so that the gas-water mixture containing microbubbles in the inner microbubble generation chamber 171 and the gas in the outer aeration chamber 172 can be discharged from the micropores. In some examples, the value range of the micropore diameter on the two layers of the diaphragm is 0.5-2 mm.

[0054] In some embodiments, the aeration head further includes a backwashing pipe 151. One end of the backwashing pipe 151 passes through the outer aeration chamber 172 and the internal support 150 and extends to the outer side wall of the movable outer pipe 193. An outer pipe backwashing hole 183 is formed in the side wall of the movable outer pipe 193, and an inner pipe backwashing hole 163 is formed in the side wall of the mixed aeration pipe 160. When the double-suction pump 200 and the air pump 400 are turned on and the gas volume output by the aeration branch pipe 110 is increased to the maximum output value, the force exerted by the gas output by the aeration branch pipe 110 on the baffle 191 is increased to the maximum, so that the movable outer pipe 193 moves upward to the position where the return spring 192 is completely compressed, and the inner pipe backwashing hole 163, the outer pipe backwashing hole 183 and the backwashing pipe 151 are communicated in sequence.

[0055] At this time, a large amount of gas flows from the aeration branch pipe 110 into the inner microbubble generation chamber 171, mixes with the gas-water mixture in the inner microbubble generation chamber 171, impacts the inner wall of the inner microbubble generation chamber 171, and entrains attachments such as sludge and microorganisms from the inner wall of the inner microbubble generation chamber 171. Since the gas output from the aeration branch pipe 110 reaches the maximum output value, the internal pressure in the inner microbubble generation chamber 171 is greater than the external water pressure. At the same time, due to the resistance of the aeration diaphragm 130 to the discharge of the gas-water mixture, under the action of the internal pressure, the gas-water mixture entraining attachments such as sludge and microorganisms is discharged successively through the inner pipe backwash holes 163, the outer pipe backwash holes 183, and the backwash pipeline 151. Then, the aerated water is regularly supplied to and stopped from the gas-water branch pipe 120 to form a disturbance inside the inner microbubble generation chamber 171, so that attachments such as sludge and microorganisms are more easily discharged into the water body along with the gas-water mixture. Through the above process, the aeration head 100 of this embodiment realizes the reverse flushing and cleaning of itself.

[0056] When the aeration effect of the aeration head 100 becomes poor after long-term use, the aeration head 100 can be self-cleaned through the above process, thereby extending the service life of the aeration head 100. The poor aeration effect means that the increase in the dissolved oxygen content in the water is slow or the amount of bubbles generated decreases.

[0057] In some examples, the inner pipe backwash holes 163, the outer pipe backwash holes 183, and the backwash pipeline 151 have the same inner hole diameter, and the value range of the inner hole diameter is 0.3 - 0.4 mm.

[0058] In some examples, the dimension of the flow port 162 along the direction of the mixed aeration pipeline 160 is greater than or equal to the stroke of the movable outer pipe 193, so that when the gas output from the aeration branch pipe 110 is increased to the maximum output value, the area of the flow port 162 not blocked by the lower part of the movable outer pipe 193 reaches the maximum, so that more gas output from the aeration branch pipe 110 flows into the inner microbubble generation chamber 171, so as to make full use of the gas output from the aeration branch pipe 110 and further improve the reverse flushing and cleaning ability of the aeration head 100.

[0059] As Figure 6As shown in the figure, the present invention also provides an aeration device for generating enhanced microbubbles. The aeration device includes an aeration head 100 for generating enhanced microbubbles, a double-suction pump 200, a dissolved air tank 300, an air pump 400, a water distribution pipe 500, an air distribution pipe 600, a dissolved oxygen meter 700, and a controller 800 as described above. One or more aeration heads 100 are located at the bottom of the water body in the aeration tank 000, and the aeration diaphragm 130 of the aeration head 100 faces the water surface of the aeration tank 000. The double-suction pump 200 is provided with a first water inlet 210, a second water inlet 220, and a water outlet 230. The double-suction pump 200 is used to pump external gas from the first water inlet 210 of the double-suction pump 200 to the water outlet 230 of the double-suction pump 200 and pump the upper pool water in the aeration tank 000 from the second water inlet 220 of the double-suction pump 200 to the water outlet 230 of the double-suction pump 200, so as to form gas-water effluent in this way.

[0060] The input end 310 of the dissolved air tank 300 is communicated with the water outlet 230 of the double-suction pump 200 for receiving gas-water effluent. The output end 320 of the dissolved air tank 300 is communicated with the gas-water distribution pipe 120 of each aeration head 100 through the water distribution pipe 500. When the dissolved air tank 300 reaches a preset pressure value, the output end 320 of the dissolved air tank 300 outputs dissolved air water and transports it to each aeration head 100.

[0061] The air pump 400 is used to pump external gas from the air inlet 410 of the air pump 400 to the air outlet 420 of the air pump 400. The air outlet 420 of the air pump 400 is communicated with the aeration distribution pipe 110 of each aeration head 100 through the air distribution pipe 600. The dissolved oxygen meter 700 is located in the water body of the aeration tank 000 for monitoring the dissolved oxygen content in the water body of the aeration tank 000. The double-suction pump 200, the air pump 400, and the dissolved oxygen meter 700 are respectively electrically connected to the controller 800. The controller 800 controls the start and stop of the double-suction pump 200, the start and stop of the air pump 400, and the air intake of the air pump 400 based on the measured value from the dissolved oxygen meter 700.

[0062] The present invention adjusts the aeration mode of the aeration device by setting the controller 800 to control the start and stop of the double-suction pump 200, the start and stop of the air pump 400, and the air intake of the air pump 400 based on the measured value from the dissolved oxygen meter 700. When the controller 800 controls the double-suction pump 200 to start and the air pump 400 to stop, the aeration device is in the dissolved air release mode. When the controller 800 controls the double-suction pump 200 to stop, the air pump 400 to start and not output the maximum gas volume, the aeration device is in the direct aeration mode. When the controller 800 controls the double-suction pump 200 to start, the air pump 400 to start and not output the maximum gas volume, the aeration device is in the mixed aeration mode. When the controller 800 controls the air pump 400 to start and output the maximum gas volume, and the double-suction pump 200 switches between start and stop, the aeration device is in the reverse flushing mode.

[0063] In some embodiments, the controller 800 can also control the power of the double-suction pump 200 based on the measurement values from the dissolved oxygen meter 700, so as to adjust the air intake volume of the first water inlet 210 of the double-suction pump 200 and the water intake volume of the second water inlet 220, and further adjust the aeration volume of the aeration head 100.

[0064] In some examples, the air-water ratio of the double-suction pump 200 ranges from 1:8 to 1:11. In some examples, the dissolved air tank 300 is made of pressure-resistant materials, such as carbon steel or stainless steel. A pressure sensor can be provided on the dissolved air tank 300. In some examples, the preset pressure range of the dissolved air tank 300 is 0.4 - 0.6 MPa. When the pressure sensed by the sensor reaches the preset pressure range, the output end 320 of the dissolved air tank 300 outputs air-dissolved water.

[0065] In some examples, the air distribution pipe 600 is made of PVC or PE materials. The water distribution pipe 500 is made of PPR or PE materials.

[0066] In some embodiments, the aeration device further includes a filter 900 and a first pipeline 910. The filter 900 is located above the water body in the aeration tank 000, and the second water inlet 220 of the double-suction pump 200 is connected to the filter 900 through the first pipeline 910. The first pipeline 910 can be made of corrosion-resistant materials, such as PVC, ABS or PP.

[0067] In this embodiment, a filter is provided to filter out impurities such as water sludge existing above the water body in the aeration tank 000.

[0068] In some embodiments, the aeration device further includes a first air inlet pipe 240 and a second air inlet pipe 430. The first water inlet 210 of the double-suction pump 200 is connected to the external gas through the first air inlet pipe 240. The air inlet 410 of the air pump 400 is connected to the external gas through the second air inlet pipe 430.

[0069] In some embodiments, the aeration device further includes a first check valve 920, and the first check valve 920 is located on the first pipeline 910.

[0070] In some embodiments, the aeration device further includes a second check valve and a third check valve. The second check valve is located on the first air inlet pipe 240, and the third check valve is located on the second air inlet pipe 430, which is used to prevent water and air from flowing back due to the shutdown of the air pump 400 and the double-suction pump 200, thereby causing the drive motors of the air pump 400 and the double-suction pump 200 to reverse.

[0071] The present invention also provides an aeration method for generating enhanced microbubbles. The implementation of this aeration method uses an aeration device for generating enhanced microbubbles provided in this application, including the following steps:

[0072] Turn on the double-suction pump 200. The external gas and the upper pool water in the aeration tank 000 form gas-water effluent through the double-suction pump 200. The gas-water effluent forms gas-dissolved water through the dissolved air tank 300. The gas-water branch pipe 120 of the aeration head 100 receives the gas-dissolved water, and the gas-dissolved water forms microbubbles through the pressure-reducing holes 161 of the aeration head 100. The microbubbles sequentially enter the water body in the aeration tank 000 through the inner microbubble generation chamber 171 and the aeration diaphragm 130, so as to increase the dissolved oxygen content in the water body.

[0073] Turn on the air pump 400. The external gas is pumped to the aeration branch pipe 110 of the aeration head 100, and the gas output from the aeration branch pipe 110 of the aeration head 100 is directed towards the lower part of the baffle 191. By adjusting the air intake of the air pump 400, the area of the lower part of the movable outer pipe 193 blocking the flow port 162 is adjusted, so as to adjust the amount of gas flowing from the outer aeration chamber 172 to the inner microbubble generation chamber 171, including: when increasing the air intake of the air pump 400, the gas output from the aeration branch pipe 110 drives the movable outer pipe 193 to move upward along the mixed aeration pipeline 160 by means of the baffle 191, thereby reducing the area of the lower part of the movable outer pipe 193 blocking the flow port 162, and is used to increase the amount of gas flowing from the outer aeration chamber 172 to the inner microbubble generation chamber 171. When reducing the air intake of the air pump 400, the gas output from the aeration branch pipe 110 drives the movable outer pipe 193 to move downward along the mixed aeration pipeline 160 by means of the baffle 191, thereby increasing the area of the lower part of the movable outer pipe 193 blocking the flow port 162, and is used to reduce the amount of gas flowing from the outer aeration chamber 172 to the inner microbubble generation chamber 171. The gas flowing from the outer aeration chamber 172 to the inner microbubble generation chamber 171 stirs the inner microbubble generation chamber 171 to generate more microbubbles, and the amount of microbubbles in the inner microbubble generation chamber 171 is adjusted by adjusting the air intake of the air pump 400.

[0074] A method for aeration to generate enhanced microbubbles provided by the present application further includes the following steps:

[0075] Turn on the double-suction pump 200 and the air pump 400 and adjust the air intake of the air pump 400 to the maximum value. The movable outer pipe 193 moves upward to the position where the return spring 192 is completely compressed, and the inner pipe backwashing hole 163, the outer pipe backwashing hole 183, and the backwashing pipeline 151 are sequentially connected. Control the double-suction pump 200 to switch between the on state and the off state. The gas-water mixture containing microbubbles discharged from the pressure-reducing holes 161 of the aeration head 100 is mixed with the gas flowing from the outer aeration chamber 172 to the inner microbubble generation chamber 171 and then impacts the inner wall of the inner microbubble generation chamber 171. The gas-water mixture carrying the attachments on the inner wall of the inner microbubble generation chamber 171 is discharged through the inner pipe backwashing hole 163, the outer pipe backwashing hole 183, and the backwashing pipeline 151 in sequence.

[0076] Use ordinary aeration equipment that uses the aerosol gas release method for aeration, a single microporous aeration equipment that uses the blower aeration method for aeration, and the aeration equipment provided by the present invention to treat the wastewater in the aeration tank respectively. The performance parameters such as the COD (Chemical Oxygen Demand) removal rate, oxygen utilization rate, service life, energy consumption, and degree of intelligence of each equipment are shown in the following table. It can be seen from Table 1 below that the aeration equipment provided by the present invention combines the advantages of the aerosol gas release method and the direct aeration method. Compared with the other two types of equipment, it has the advantages of high oxygen utilization rate, high COD removal rate, long service life, high degree of intelligence, and low energy consumption, and can meet the aerobic aeration process.

[0077] Table 1 Comparison of various equipment

[0078]

[0079] The present invention provides an idea and method for an aeration head, an aeration equipment, and an aeration method that generate enhanced microbubbles. There are many methods and ways to specifically implement this technical solution. The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. Each component not clearly defined in this embodiment can be implemented by the prior art.

Claims

1. An aeration head for generating enhanced microbubbles, characterized in that, the aeration head (100) includes an aeration branch pipe (110) for introducing external gas, an air-water separation pipe (120) for introducing air-dissolved water, an aeration membrane (130), an inner microbubble generation chamber (171), an outer aeration chamber (172), and an adjustment mechanism (190); The inner microbubble generation chamber (171) is used to receive the air-dissolved water from the air-water separation pipe (120) and generate microbubbles from the air-dissolved water by the air-dissolved gas release method, and the microbubbles are discharged through the aeration membrane (130); The outer aeration chamber (172) is used to receive the gas from the aeration branch pipe (110) and discharge the gas through the aeration membrane (130); The adjustment mechanism (190) is used to adjust the amount of gas flowing from the outer aeration chamber (172) to the inner microbubble generation chamber (171); It includes an internal support (150) and a mixed aeration pipe (160); the internal support (150) is fixedly installed inside the aeration head (100); the mixed aeration pipe (160) penetrates through the internal support (150); the internal support (150) and the mixed aeration pipe (160) divide the inside of the aeration head (100) into an inner microbubble generation chamber (171) and an outer aeration chamber (172); a communication port (162) for communicating the inner microbubble generation chamber (171) and the outer aeration chamber (172) is opened on the side wall of the mixed aeration pipe (160).

2. The aeration head for generating enhanced microbubbles according to claim 1, characterized in that, the adjustment mechanism (190) includes a movable outer pipe (193) movably sleeved outside the mixed aeration pipe (160) for blocking the communication port (162), and the movable outer pipe (193) can reciprocate along the mixed aeration pipe (160) to adjust the area of the lower part of the movable outer pipe (193) covering the communication port (162).

3. The aeration head for generating enhanced microbubbles according to claim 2, characterized in that, The adjusting mechanism (190) further includes a baffle (191) and a return spring (192). The baffle (191) is installed at the lower part of the movable outer tube (193), and the gas output from the aeration branch pipe (110) faces the lower part of the baffle (191). The return spring (192) is located between the mixed aeration pipe (160) and the internal support (150), and the movable outer tube (193) is connected to the internal support (150) through the return spring (192). When the gas volume output from the aeration branch pipe (110) increases, the pressure exerted by the gas output from the aeration branch pipe (110) on the baffle (191) increases, and the movable outer tube (193) moves along the mixed aeration pipe (160) towards the aeration diaphragm (130) under the action of the gas pressure and compresses the return spring (192). When the gas volume output from the aeration branch pipe (110) decreases, the pressure exerted by the gas output from the aeration branch pipe (110) on the baffle (191) decreases, and the movable outer tube (193) moves away from the aeration diaphragm (130) under the action of the return spring (192).

4. An aeration head for generating enhanced microbubbles according to claim 3, wherein, the aeration head (100) further includes a backwashing pipe (151). One end of the backwashing pipe (151) passes through the outer aeration chamber (172) and the internal support (150) and extends to the outer side wall of the movable outer tube (193). An outer tube backwashing hole (183) is formed on the side wall of the movable outer tube (193), and an inner tube backwashing hole (163) is formed on the side wall of the mixed aeration pipe (160). When the gas volume output from the aeration branch pipe (110) reaches the maximum value, the movable outer tube (193) moves upward to the position where the return spring (192) is completely compressed, and the inner tube backwashing hole (163), the outer tube backwashing hole (183), and the backwashing pipe (151) are sequentially communicated.

5. An aeration head for generating enhanced microbubbles according to claim 4, wherein, the aeration diaphragm (130) is a double-layer aeration diaphragm, and the micropore positions on the two layers of the double-layer aeration diaphragm are staggered with each other.

6. An aeration head for generating enhanced microbubbles according to claim 5, wherein, the mixed aeration pipe (160) is communicated with the gas-water separation pipe (120) through a pressure reducing hole (161), and the gas-dissolved water from the gas-water separation pipe (120) releases microbubbles to the mixed aeration pipe (160) through the pressure reducing hole (161). The pressure reducing hole (161) is located below the circulation port (162).

7. An aeration device for generating enhanced microbubbles, wherein, Comprising more than one aeration head (100) for generating enhanced microbubbles as described in claim 6, a double-suction pump (200), a dissolved air tank (300), an air pump (400), a water distribution pipe (500), an air distribution pipe (600), a dissolved oxygen meter (700), and a controller (800). More than one of the aeration heads (100) are located at the bottom of the water body in the aeration tank (000). The double-suction pump (200) is provided with a first water inlet (210), a second water inlet (220), and a water outlet (230). The double-suction pump (200) is used to pump external gas from the first water inlet (210) of the double-suction pump (200) to the water outlet (230) of the double-suction pump (200), and to pump the upper pool water in the aeration tank (000) from the second water inlet (220) of the double-suction pump (200) to the water outlet (230) of the double-suction pump (200), thereby forming air-water effluent in this way. The input end (310) of the dissolved air tank (300) is communicated with the water outlet (230) of the double-suction pump (200) for receiving the air-water effluent. The output end (320) of the dissolved air tank (300) is communicated with the air-water distribution pipe (120) of each aeration head (100) through the water distribution pipe (500) for transporting the air-dissolved water from the output end (320) of the dissolved air tank (300) to each aeration head (100). The air pump (400) is used to pump external gas from the air inlet (410) of the air pump (400) to the air outlet (420) of the air pump (400). The air outlet (420) of the air pump (400) is communicated with the aeration distribution pipe (110) of each aeration head (100) through the air distribution pipe (600). The dissolved oxygen meter (700) is located in the water body of the aeration tank (000) for monitoring the dissolved oxygen content in the water body of the aeration tank (000). The double-suction pump (200), the air pump (400), and the dissolved oxygen meter (700) are respectively electrically connected to the controller (800). The controller (800) controls the start and stop of the double-suction pump (200), the start and stop of the air pump (400), and the air intake of the air pump (400) based on the measured value from the dissolved oxygen meter (700).

8. An aeration device for generating enhanced microbubbles according to claim 7, characterized in that, it further comprises a filter (900) and a first pipeline (910). The filter (900) is located in the upper part of the water body in the aeration tank (000). The second water inlet (220) of the double-suction pump (200) is communicated with the filter (900) through the first pipeline (910). It further comprises a first air inlet pipe (240), a second air inlet pipe (430), and a first check valve (920). The first water inlet (210) of the double-suction pump (200) is communicated with external gas through the first air inlet pipe (240). The air inlet (410) of the air pump (400) is communicated with external gas through the second air inlet pipe (430). The first check valve (920) is located on the first pipeline (910).

9. An aeration method for generating enhanced microbubbles, characterized in that, using an aeration device for generating enhanced microbubbles according to any one of claims 7 to 8, comprising the following steps: Turn on the double-suction pump (200), and the external gas and the upper pool water in the aeration tank (000) form gas-water effluent through the double-suction pump (200); the gas-water effluent forms gas-dissolved water through the dissolved air tank (300); the gas-water branch pipe (120) of the aeration head (100) receives the gas-dissolved water, and the gas-dissolved water forms microbubbles through the pressure-reducing holes (161) of the aeration head (100), and the microbubbles enter the water body in the aeration tank (000) through the inner microbubble generation cavity (171) and the double-layer aeration diaphragm, so as to increase the dissolved oxygen content in the water body in the aeration tank (000); Turn on the air pump (400), the external gas is pumped to the aeration branch pipe (110) of the aeration head (100), and the gas output by the aeration branch pipe (110) faces the lower part of the baffle (191); by adjusting the air intake of the air pump (400), the area of the lower part of the movable outer pipe (193) blocking the flow port (162) is adjusted, so as to adjust the gas volume flowing from the outer aeration cavity (172) to the inner microbubble generation cavity (171), including: When increasing the air intake of the air pump (400), the gas output by the aeration branch pipe (110) drives the movable outer pipe (193) to move upward along the mixed aeration pipeline (160) by means of the baffle (191), reducing the area of the lower part of the movable outer pipe (193) blocking the flow port (162), for increasing the gas volume flowing from the outer aeration cavity (172) to the inner microbubble generation cavity (171); when reducing the air intake of the air pump (400), the gas output by the aeration branch pipe (110) drives the movable outer pipe (193) to move downward along the mixed aeration pipeline (160) by means of the baffle (191), increasing the area of the lower part of the movable outer pipe (193) blocking the flow port (162), for reducing the gas volume flowing from the outer aeration cavity (172) to the inner microbubble generation cavity (171); the gas flowing from the outer aeration cavity (172) to the inner microbubble generation cavity (171) agitates the inner microbubble generation cavity (171) to generate more microbubbles, and the amount of microbubbles in the inner microbubble generation cavity (171) is adjusted by adjusting the air intake of the air pump (400).

10. An aeration method for generating enhanced microbubbles according to claim 9, characterized in that, further comprising the following steps: Turn on the double-suction pump (200) and the air pump (400), and adjust the air intake of the air pump (400) to the maximum value. The movable outer tube (193) moves upward to the position where the return spring (192) is completely compressed. The inner tube backwashing hole (163), the outer tube backwashing hole (183), and the backwashing pipeline (151) are communicated in sequence. Control the double-suction pump (200) to switch between the on state and the off state. The gas-water mixture containing microbubbles discharged from the pressure-reducing hole (161) of the aeration head (100) is mixed with the gas flowing from the outer aeration chamber (172) to the inner microbubble generation chamber (171), and then impacts the inner wall of the inner microbubble generation chamber (171). The gas-water mixture carrying the attachments on the inner wall of the inner microbubble generation chamber (171) is discharged from the backwashing pipeline (151).

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