Device for treating wastewater by micro-nano bubble aeration

Abstract

The invention provides a device for treating wastewater by micro-nano bubble aeration, and relates to the technical field of wastewater treatment.The device comprises a mounting rack, floating plates are fixedly mounted on the two sides of the mounting rack respectively, a protection box is fixedly mounted on the upper surface of the mounting rack, and an air inlet cover is arranged at the upper end of the protection box; an air supplementing assembly used for supplementing air is fixedly mounted in the protection box, a connecting sleeve rod is fixedly mounted at the lower end of the mounting frame, and an aeration assembly used for aeration is fixedly connected to the bottom of the connecting sleeve rod; the control panel continuously moves up and down, so that spaced exhaust aeration operation is realized, and compared with an existing device which continuously aerates one part, the interval of single aeration is increased, so that the oxygen delivery rate cannot be too high, resource waste is avoided, repeated aeration of wastewater after aeration is also avoided, and the aeration efficiency is improved. And the oxygen utilization rate is increased.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a device for treating wastewater by utilizing micro-nano bubble aeration. Background Art

[0002] The aeration device is an important device for supplying oxygen to the aeration tank during the wastewater activated sludge process. For example, the patent announcement number is CN210855484U, which is an aeration device for mine wastewater treatment. In order to solve the problem of poor aeration effect of existing water treatment, a water outlet pipe is arranged on the lower side of the aeration box, and a mud outlet door is arranged at the lower position of the front side of the aeration box. A water inlet pipe is arranged on the upper side of the aeration box, and an aeration device that runs through the aeration box is arranged at the center position of the upper surface of the aeration box. The utility model is provided with aeration blades that can rotate and stir, so that air can enter the wastewater evenly, and through the principle of stirring, the air can be better combined with the wastewater, so that ferrous ions are reduced. A heating strip is arranged on the aeration blade. By heating the wastewater, the problem of slow chemical reaction in a low temperature environment can be solved, and the aeration rate can be increased. The scraper can scrape off the debris on the inner wall of the aeration box, which can facilitate cleaning.

[0003] Existing aeration devices are generally used for continuous aeration when in use. During the continuous aeration process, the fluidity of the wastewater is not high, so the oxygen delivery rate of the wastewater at the current position is too fast. However, the oxygen required by the wastewater is limited, resulting in excessive gas displacement in the above process, which not only causes a waste of additional resources, but also reduces the oxygen utilization rate. For this reason, the present application designs a device for treating wastewater using micro-nano bubble aeration. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a device for treating wastewater using micro-nano bubble aeration, which solves the problem that the existing aeration device is continuous aeration, so that the oxygen delivery rate to the wastewater at the current location is too fast, which leads to a decrease in oxygen utilization rate.

[0005] To achieve the above object, the technical solution adopted by the present invention is: A device for treating wastewater by using micro-nano bubble aeration, comprising a mounting frame, floating plates are fixedly mounted on both sides of the mounting frame, a protection box is fixedly mounted on the upper surface of the mounting frame, an air intake hood is arranged on the upper end of the protection box, and a gas replenishing component for replenishing gas is fixedly mounted inside the protection box; A connecting sleeve rod is fixedly installed at the lower end of the mounting frame, an aeration assembly for aeration is fixedly connected to the bottom of the connecting sleeve rod, and the aeration assembly is connected to the air supply assembly.

[0006] Preferably, the air supply component includes a fixing frame, which is fixedly mounted on the upper surface of the mounting frame, a hollow shaft motor is fixedly mounted on the upper end of the mounting frame, an exhaust impeller is fixedly mounted on the upper output shaft of the hollow shaft motor, and the exhaust impeller is located in the air intake hood.

[0007] Preferably, a hollow shaft is fixedly mounted on the output shaft at the lower end of the hollow shaft motor, the hollow shaft is sleeved inside the connecting sleeve rod, an air supply channel is opened inside the hollow shaft, and the exhaust port of the exhaust impeller is communicated with the air supply channel.

[0008] Preferably, the aeration assembly comprises a housing, a connecting frame is fixedly mounted on the upper end of the housing, and the connecting frame is fixedly connected to the connecting sleeve rod; The inside of the shell is provided with an interactive groove, a pre-storage groove and a connection groove in sequence from bottom to top, a rotating chassis is arranged below the shell, and a filter screen is arranged between the rotating chassis and the shell.

[0009] Preferably, the inner wall of the interaction groove is fixedly provided with a guide thread for guiding the liquid to flow upward, the hollow shaft is located in the interaction groove and is fixedly provided with a plurality of stirring blades for strengthening the contact between the liquid and the gas, and the hollow shaft is fixedly provided with a group of air outlets at the lower end of the stirring blades, and the air outlets are communicated with the air supply channel.

[0010] Preferably, the middle portion of the rotating chassis is fixedly connected to the hollow rotating shaft, a plurality of cleaning brushes are fixedly mounted on the outer side of the rotating chassis, and a pumping impeller is fixedly mounted on the upper surface of the rotating chassis.

[0011] Preferably, a limit slide groove is provided on the inner wall of the pre-storage groove, a control disk is connected to the inner wall of the limit slide groove, a limit slide rod is provided on the outer periphery of the control disk, and the limit slide rod is slidably connected to the limit slide groove; A threaded hole is provided in the middle of the control disk, and a reciprocating thread is provided on the shaft body of the hollow shaft located at the pre-storage groove, and the reciprocating thread is threadably matched with the threaded hole.

[0012] Preferably, a plurality of connecting through holes are opened through the surface of the control panel, a movable sliding rod is movably installed inside each of the connecting through holes, a sealing cover plate is fixedly installed on the upper end of the movable sliding rod, a top plate is fixedly installed on the lower end of the movable sliding rod, an auxiliary spring is arranged between the top plate and the bottom of the control panel, and the auxiliary spring is sleeved on the rod body of the movable sliding rod.

[0013] Preferably, a matching cover is slidably installed inside the connecting groove, a sealing ring is provided on the outside of the matching cover and the sealing ring is in contact with the inner wall of the connecting groove, a plurality of discharge grooves are opened on the outside of the matching cover, a diaphragm is installed inside each of the discharge grooves, and a plurality of discharge holes are opened on the surface of each diaphragm.

[0014] Preferably, a movable groove is provided on the outer side of the connecting sleeve rod, a connecting slip ring is fixedly installed on the inner wall of the matching cover, the connecting slip ring is slidably connected to the movable groove, and a supporting spring is fixedly installed between the connecting slip ring and the movable groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. By starting the hollow shaft motor, the exhaust impeller and the hollow shaft can be driven to rotate at the same time. When the exhaust impeller rotates, the exhaust impeller is located in the air intake hood, so that the outside air is drawn into the hollow shaft, and enters the aeration component through the air supply channel, thereby realizing continuous air replenishment to cooperate with the wastewater below for aeration. No additional wiring is required for air supply, and independent aeration treatment is achieved with the floating plate; Through the continuous discharge of gas, the gas will enter the gas outlet tube along the gas supply channel. The rotation of the hollow shaft also causes the gas outlet tube to rotate, and the gas discharged from the gas outlet tube is distributed to any position, avoiding uneven gas distribution.

[0016] 2. By starting the hollow shaft motor, the hollow shaft can be driven to rotate. When the hollow shaft rotates, the hollow shaft is fixedly connected to the rotating chassis, so that the rotating chassis rotates accordingly. When the rotating chassis rotates, the pumping impeller can be used to pump the waste water from the periphery into the interactive tank. At the same time, several cleaning brushes will also rotate to clean the outside of the filter to avoid the accumulation of impurities on the outside of the filter. In this application, the filter can prevent impurities from entering the interactive tank to avoid affecting the subsequent aeration and discharge effects.

[0017] 3. In order to enhance the aeration effect, a stirring blade is arranged on the hollow shaft body, so that the stirring blade can stir the current wastewater and gas, further enhancing the reaction effect. The hollow shaft rotates, so that the reciprocating thread on the hollow shaft body cooperates with the thread of the threaded hole, and the limiting slide rod and the limiting slide groove are slidably connected, so that the control panel can move up and down within a certain range. When the control panel rises, the auxiliary spring is expanded by liquid pressure, so that the sealing cover plate moves down and seals in the connecting through hole, and then the liquid is pushed upward to gradually increase the internal pressure, and the discharge operation is carried out in cooperation with the matching cover to avoid a decrease in single exhaust volume due to insufficient pressure, so as to complete the aeration treatment; When the control panel descends, the supplemented liquid below is used to press and contract the auxiliary spring, so that the liquid below will pass through the connecting hole and move up to the top of the control panel, thereby realizing the pre-storage operation, and then the reciprocating thread is used to guide the control panel to move up and down to realize the continuous discharge operation. The above structure can realize intermittent exhaust aeration operation. Compared with the existing device that continuously aerates one place, the present application increases the interval of a single aeration, so that the oxygen supply rate will not be too fast, thereby avoiding waste of resources, and also avoiding repeated aeration of the wastewater after aeration, so that the present application increases the oxygen utilization rate.

[0018] 4. The connecting slip ring can be pushed downward by the support spring, so that the default position of the matching cover is the lower end, and there will be no gas leakage problem. Then, the control panel is moved upward, and the support spring will shrink under its pressure, and the matching cover will be pushed upward. During the ejection process, the internal pressure is gradually increased, so that the current gas and liquid are discharged from the corresponding discharge holes respectively. In this application, the diaphragm has a certain elasticity. When the current pressure is insufficient, the discharge hole will be closed so that there will be no leakage in the discharge hole, and when the pressure is sufficient, it will be launched to achieve continuous discharge aeration operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the top view of the structure of the present invention; Figure 3 yes Figure 2 Schematic diagram of the three-dimensional structure of the cross section at AA in the middle; Figure 4 It is a three-dimensional structural schematic diagram of the gas replenishment component; Figure 5 It is a schematic diagram of the structure of the air supply component when viewed from above; Figure 6 yes Figure 5 Schematic diagram of the three-dimensional structure of the cross section at BB; Figure 7 It is a schematic diagram of the three-dimensional structure of the aeration component; Figure 8 It is a schematic diagram of the top view of the aeration assembly; Fig. 9 yes Figure 8 Schematic diagram of the three-dimensional structure of the cross section at CC; Fig.10 yes Figure 8 Schematic diagram of the three-dimensional structure of the cross section at DD; Fig.11 yes Fig. 9 A is an enlarged schematic diagram of the structure; Fig.12 yes Fig. 9 The enlarged structural diagram at point b in the middle.

[0020] In the figure: 1, mounting frame; 2, protection box; 201, air intake cover; 3, air supply assembly; 301, fixing frame; 302, hollow shaft motor; 303, exhaust impeller; 304, hollow shaft; 3041, reciprocating thread; 3042, stirring blade; 3043, air outlet; 305, air supply channel; 4, floating plate; 5, aeration assembly; 501, housing; 5011, connecting frame; 502, interactive groove; 5021, guide thread; 503, pre-storage groove; 5031, limit slide; 504, rotating chassis; 50 41. Cleaning brush; 5042. Pumping impeller; 5043. Filter; 505. Connecting groove; 5051. Matching cover; 5052. Connecting slip ring; 5053. Discharge groove; 5054. Diaphragm; 5055. Discharge hole; 506. Control panel; 5061. Threaded hole; 5062. Connecting through hole; 5063. Movable slide rod; 5064. Sealing cover plate; 5065. Top plate; 5066. Auxiliary spring; 5067. Limiting slide rod; 6. Connecting sleeve rod; 601. Movable groove; 602. Support spring. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] like Figures 1 to 12 As shown, a device for treating wastewater by using micro-nano bubble aeration comprises a mounting frame 1, floating plates 4 are fixedly mounted on both sides of the mounting frame 1, a protection box 2 is fixedly mounted on the upper surface of the mounting frame 1, an air intake hood 201 is arranged on the upper end of the protection box 2, and a gas replenishing component 3 for replenishing gas is fixedly mounted inside the protection box 2; A connecting sleeve rod 6 is fixedly installed at the lower end of the mounting frame 1 , and an aeration assembly 5 for aeration is fixedly connected to the bottom of the connecting sleeve rod 6 , and the aeration assembly 5 is connected to the air supply assembly 3 .

[0023] Before use, the floating plate 4 can float on the water surface, so that the present invention can be freely transferred to the desired wastewater treatment location.

[0024] In this embodiment, the air supply component 3 includes a fixing frame 301, the fixing frame 301 is fixedly mounted on the upper surface of the mounting frame 1, a hollow shaft motor 302 is fixedly mounted on the upper end of the mounting frame 1, an exhaust impeller 303 is fixedly mounted on the output shaft of the upper end of the hollow shaft motor 302, and the exhaust impeller 303 is located in the air intake cover 201; A hollow shaft 304 is fixedly mounted on the output shaft at the lower end of the hollow shaft motor 302 . The hollow shaft 304 is sleeved inside the connecting sleeve rod 6 . An air supply channel 305 is opened inside the hollow shaft 304 . The exhaust part of the exhaust impeller 303 is communicated with the air supply channel 305 .

[0025] By starting the hollow shaft motor 302, the exhaust impeller 303 and the hollow shaft 304 can be driven to rotate at the same time. When the exhaust impeller 303 rotates, the exhaust impeller 303 is located in the air inlet hood 201, so that the outside air is drawn into the hollow shaft 304, and enters the aeration component 5 along the air supply channel 305, thereby realizing continuous air replenishment to cooperate with the aeration of the wastewater below. No additional wiring is required for air supply, and independent aeration treatment is achieved in cooperation with the floating plate 4.

[0026] It should be noted that the aeration assembly 5 includes a housing 501, a connecting frame 5011 is fixedly installed on the upper end of the housing 501, and the connecting frame 5011 is fixedly connected to the connecting sleeve rod 6; The shell 501 is provided with an interactive slot 502 , a pre-storage slot 503 and a connection slot 505 in sequence from bottom to top. A rotating chassis 504 is provided below the shell 501 , and a filter screen 5043 is provided between the rotating chassis 504 and the shell 501 .

[0027] Among them, a guide thread 5021 for guiding the liquid to flow upward is fixedly set on the inner wall of the interactive groove 502, a plurality of stirring blades 3042 for strengthening the contact between the liquid and the gas are fixedly installed on the shaft body of the hollow rotating shaft 304 located at the interactive groove 502, and a group of air outlets 3043 are fixedly installed on the shaft body of the hollow rotating shaft 304 and at the lower end of the stirring blades 3042, and the air outlets 3043 are interconnected with the air supply channel 305.

[0028] With the continuous discharge of gas, the gas will enter the gas outlet tube 3043 along the gas supply channel 305. The rotation of the hollow shaft 304 also rotates the gas outlet tube 3043, and the gas discharged from the gas outlet tube 3043 is distributed to any position to avoid uneven gas distribution.

[0029] In the specific configuration, the middle of the rotating chassis 504 is fixedly connected to the hollow rotating shaft 304 , a plurality of cleaning brushes 5041 are fixedly installed on the outer side of the rotating chassis 504 , and a pumping impeller 5042 is fixedly installed on the upper surface of the rotating chassis 504 .

[0030] By starting the hollow shaft motor 302, the hollow shaft 304 can be driven to rotate. When the hollow shaft 304 rotates, the hollow shaft 304 is fixedly connected to the rotating chassis 504, so that the rotating chassis 504 rotates accordingly. When the rotating chassis 504 rotates, the pumping impeller 5042 can be used to pump the waste water from the periphery into the interactive tank 502. At the same time, a number of cleaning brushes 5041 will also rotate accordingly to clean the outside of the filter 5043 to avoid the accumulation of impurities on the outside of the filter 5043. In the present application, the filter 5043 can prevent impurities from entering the interactive tank 502 to avoid affecting the subsequent aeration and discharge effects. In order to enhance the aeration effect, the stirring blades 3042 are arranged on the shaft body of the hollow rotating shaft 304, so that the stirring blades 3042 can stir the current wastewater and gas, further enhancing the reaction effect.

[0031] In the present application, a limit slide groove 5031 is provided on the inner wall of the pre-storage groove 503, a control panel 506 is connected to the inner wall of the limit slide groove 5031, a limit slide rod 5067 is provided on the outer periphery of the control panel 506, and the limit slide rod 5067 is slidably connected to the limit slide groove 5031; A threaded hole 5061 is provided in the middle of the control plate 506, and a reciprocating thread 3041 is provided on the shaft body of the hollow shaft 304 located at the pre-storage groove 503, and the reciprocating thread 3041 is threadedly matched with the threaded hole 5061; A plurality of connecting through holes 5062 are formed through the surface of the control panel 506, and a movable slide rod 5063 is movably installed inside each connecting through hole 5062. A sealing cover plate 5064 is fixedly installed on the upper end of the movable slide rod 5063, and a top plate 5065 is fixedly installed on the lower end of the movable slide rod 5063. An auxiliary spring 5066 is provided between the top plate 5065 and the bottom of the control panel 506, and the auxiliary spring 5066 is sleeved on the rod body of the movable slide rod 5063.

[0032] The hollow shaft 304 is rotated so that the reciprocating thread 3041 on the shaft of the hollow shaft 304 is threadedly matched with the threaded hole 5061, wherein the limiting slide rod 5067 is slidably connected with the limiting slide groove 5031, so that the control disk 506 can move up and down within a certain range, wherein when the control disk 506 rises, the auxiliary spring 5066 is expanded by the liquid pressure, so that the sealing cover plate 5064 moves down and is sealed in the connecting through hole 5062, and then the liquid is pushed upward to gradually increase the internal pressure, and the exhaust operation is carried out in cooperation with the matching cover 5051, so as to avoid the single exhaust volume reduction caused by insufficient pressure, and realize the completion of aeration treatment; When the control disk 506 descends, the supplemented liquid below is used to press and contract the auxiliary spring 5066, so that the liquid below will pass through the connecting hole 5062 and move up to the top of the control disk 506, thereby realizing the pre-storage operation, and then the reciprocating thread 3041 is used to guide the control disk 506 to move up and down to realize continuous discharge operation. The above structure can realize intermittent exhaust aeration operation. Compared with the existing device that continuously aerates one place, the present application increases the interval between single aerations, so that the oxygen supply rate will not be too fast, thereby avoiding waste of resources, and also avoiding repeated aeration of the wastewater after aeration, so that the present application increases the oxygen utilization rate.

[0033] In the present application, a matching cover 5051 is slidably installed inside the connecting groove 505, a sealing ring is arranged on the outside of the matching cover 5051 and the sealing ring is in contact with the inner wall of the connecting groove 505, a plurality of discharge grooves 5053 are provided on the outside of the matching cover 5051, a diaphragm 5054 is installed inside each of the discharge grooves 5053, and a plurality of discharge holes 5055 are provided on the surface of each diaphragm 5054.

[0034] A movable groove 601 is formed on the outer side of the connecting sleeve rod 6 , and a connecting slip ring 5052 is fixedly installed on the inner wall of the matching cover 5051 . The connecting slip ring 5052 is slidably connected to the movable groove 601 , and a supporting spring 602 is fixedly installed between the connecting slip ring 5052 and the movable groove 601 .

[0035] The connecting slip ring 5052 can be pushed downward by the supporting spring 602, so that the default position of the matching cover 5051 is the lower end, and there will be no gas leakage problem. Then, the control plate 506 is moved upward, and the supporting spring 602 will shrink under its pressure, and the matching cover 5051 will be pushed upward. During the ejection process, the internal pressure is gradually increased, so that the current gas and liquid are discharged from the corresponding discharge holes 5055 respectively; In the present application, the diaphragm 5054 has a certain elasticity. When the current pressure is insufficient, the discharge hole 5055 will be closed so that the discharge hole 5055 will not leak. When the pressure is sufficient, the diaphragm 5054 will be opened to realize continuous discharge aeration operation.

[0036] The working principle of the device for treating wastewater by micro-nano bubble aeration: When in use, first place the application at the desired wastewater treatment location as required, use the floating plate 4 to float the air supply component 3 on the water surface and extend the aeration component 5 into the wastewater; After the preparation work is completed, the hollow shaft motor 302 is started to drive the exhaust impeller 303 and the hollow shaft 304 to rotate at the same time. When the exhaust impeller 303 rotates, the exhaust impeller 303 is located in the air inlet cover 201, so that the outside air is sucked into the hollow shaft 304, and enters the aeration component 5 through the air supply channel 305, thereby realizing the continuous replenishment of air to cooperate with the wastewater below for aeration; During the driving process of the hollow shaft motor 302, the hollow shaft 304 rotates and is fixedly connected to the rotating chassis 504, so that the rotating chassis 504 rotates accordingly. When the rotating chassis 504 rotates, the pumping impeller 5042 can be used to pump waste water from the periphery into the interactive tank 502. At the same time, a plurality of cleaning brushes 5041 will also rotate accordingly to clean the outside of the filter 5043 to prevent impurities from accumulating on the outside of the filter 5043. Through the continuous discharge of gas, the gas will enter the gas outlet 3043 along the gas supply channel 305, and the gas outlet 3043 will also rotate by rotating the hollow shaft 304, so that the gas discharged from the gas outlet 3043 can be distributed to any position, avoiding uneven gas distribution; When the gas contacts the wastewater, the stirring blade 3042 is arranged on the shaft body of the hollow shaft 304, so that the stirring blade 3042 will stir the current wastewater and gas, further enhancing the reaction effect, and then the pre-treated liquid will gradually rise under the guidance of the guide thread 5021; When the wastewater below contacts oxygen, it will continue to move up and down through the control disk 506. When the control disk 506 rises, the auxiliary spring 5066 will be expanded by the liquid pressure, so that the sealing cover plate 5064 moves down and seals in the connecting through hole 5062, and then the liquid will be pushed upward to gradually increase the internal pressure, and cooperate with the cover 5051 to perform the discharge operation; After the discharge, the control disk 506 descends, and the supplemented liquid below is used to press the auxiliary spring 5066 and shrink it, so that the liquid below moves upward to the top of the control disk 506 through the connecting through hole 5062, thereby realizing the pre-storage operation to facilitate the next operation; When the treated liquid is discharged, since it still contains oxygen, it will be formed into micro-nano bubbles when discharged from the discharge hole 5055 and then aerated with the surrounding wastewater.

[0037] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A device for treating wastewater using micro-nano bubble aeration, comprising a mounting frame (1), characterized in that: Floating plates (4) are fixedly mounted on both sides of the mounting frame (1), a protective box (2) is fixedly mounted on the upper surface of the mounting frame (1), an air intake cover (201) is arranged at the upper end of the protective box (2), and a gas replenishing component (3) for replenishing gas is fixedly mounted inside the protective box (2); A connecting sleeve rod (6) is fixedly mounted on the lower end of the mounting frame (1), an aeration assembly (5) for aeration is fixedly connected to the bottom of the connecting sleeve rod (6), and the aeration assembly (5) is connected to the air supply assembly (3).

2. The device for treating wastewater by using micro-nano bubble aeration according to claim 1, characterized in that: The air supply component (3) comprises a fixing frame (301), the fixing frame (301) being fixedly mounted on the upper surface of the mounting frame (1), a hollow shaft motor (302) being fixedly mounted on the upper end of the mounting frame (1), an exhaust impeller (303) being fixedly mounted on the output shaft at the upper end of the hollow shaft motor (302), and the exhaust impeller (303) being located in the air intake cover (201).

3. The device for treating wastewater by using micro-nano bubble aeration according to claim 2, characterized in that: A hollow rotating shaft (304) is fixedly mounted on the output shaft at the lower end of the hollow shaft motor (302); the hollow rotating shaft (304) is sleeved inside the connecting sleeve rod (6); an air supply channel (305) is provided inside the hollow rotating shaft (304); and an air exhaust port of the exhaust impeller (303) is in communication with the air supply channel (305).

4. The device for treating wastewater by using micro-nano bubble aeration according to claim 3, characterized in that: The aeration assembly (5) comprises a housing (501), a connecting frame (5011) is fixedly mounted on the upper end of the housing (501), and the connecting frame (5011) is fixedly connected to the connecting sleeve rod (6); The shell (501) is provided with an interactive groove (502), a pre-storage groove (503) and a connection groove (505) in sequence from bottom to top. A rotating chassis (504) is provided below the shell (501), and a filter screen (5043) is provided between the rotating chassis (504) and the shell (501).

5. The device for treating wastewater by using micro-nano bubble aeration according to claim 4, characterized in that: The inner wall of the interactive groove (502) is fixedly provided with a guide thread (5021) for guiding the liquid to flow upward; the hollow rotating shaft (304) is located in the interactive groove (502) and is fixedly provided with a plurality of stirring blades (3042) for enhancing the contact between the liquid and the gas; the hollow rotating shaft (304) is located in the lower end of the stirring blades (3042) and is fixedly provided with a group of air outlets (3043); the air outlets (3043) are communicated with the air supply channel (305).

6. The device for treating wastewater by using micro-nano bubble aeration according to claim 4, characterized in that: The middle portion of the rotating chassis (504) is fixedly connected to the hollow rotating shaft (304), a plurality of cleaning brushes (5041) are fixedly mounted on the outer side of the rotating chassis (504), and a pumping impeller (5042) is fixedly mounted on the upper surface of the rotating chassis (504).

7. The device for treating wastewater by using micro-nano bubble aeration according to claim 4, characterized in that: The inner wall of the pre-storage groove (503) is provided with a limit slide groove (5031), the inner wall of the limit slide groove (5031) is connected to a control disk (506), a limit slide rod (5067) is provided on the outer periphery of the control disk (506), and the limit slide rod (5067) is slidably connected to the limit slide groove (5031); A threaded hole (5061) is provided in the middle of the control disk (506), and a reciprocating thread (3041) is provided on the shaft body of the hollow rotating shaft (304) located at the pre-storage groove (503), and the reciprocating thread (3041) is threadably matched with the threaded hole (5061).

8. The device for treating wastewater by using micro-nano bubble aeration according to claim 7, characterized in that: A plurality of connecting through holes (5062) are formed through the surface of the control panel (506), and a movable slide rod (5063) is movably installed inside each of the connecting through holes (5062). A sealing cover plate (5064) is fixedly installed on the upper end of the movable slide rod (5063), and a top plate (5065) is fixedly installed on the lower end of the movable slide rod (5063). An auxiliary spring (5066) is provided between the top plate (5065) and the bottom of the control panel (506), and the auxiliary spring (5066) is sleeved on the rod body of the movable slide rod (5063).

9. The device for treating wastewater by using micro-nano bubble aeration according to claim 4, characterized in that: A matching cover (5051) is slidably mounted inside the connecting groove (505), a sealing ring is arranged on the outside of the matching cover (5051) and the sealing ring is in contact with the inner wall of the connecting groove (505), a plurality of discharge grooves (5053) are opened on the outside of the matching cover (5051), a diaphragm (5054) is installed inside each of the discharge grooves (5053), and a plurality of discharge holes (5055) are opened on the surface of each of the diaphragms (5054).

10. The device for treating wastewater by using micro-nano bubble aeration according to claim 9, characterized in that: A movable groove (601) is formed on the outer side of the connecting sleeve rod (6), a connecting slip ring (5052) is fixedly installed on the inner wall of the matching cover (5051), the connecting slip ring (5052) is slidably connected to the movable groove (601), and a supporting spring (602) is fixedly installed between the connecting slip ring (5052) and the movable groove (601).

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