Nanoscale microbubble type air floatation sewage treatment device

Abstract

The invention relates to the technical field of sewage treatment, and discloses a nanoscale microbubble type air floatation sewage treatment device which comprises an air floatation tank and a guide groove plate mounted on the air floatation tank, a transmission assembly is mounted on one side of the air floatation tank, a U-shaped sliding sleeve is mounted on the guide groove plate in a sliding manner, the transmission assembly is connected with the U-shaped sliding sleeve through a transmission rod, and a slag scraping assembly is mounted in the U-shaped sliding sleeve. The transmission assembly drives the scum scraping assembly to move towards the scum discharging opening, at the moment, the guide block is matched with the inclined sliding groove, the sliding block moves downwards along the sliding groove in the U-shaped sliding sleeve along with the gradual movement of the scraping plate towards the scum discharging opening, the scraping plate extends into the liquid level, the inclined hole plate presses scum floating on the liquid level, and the scum is pressed into the bottom of the liquid level; at the moment, the demulsified emulsified oil penetrates through filter holes in an inclined pore plate to float on the liquid level due to the characteristic of small density of the demulsified emulsified oil, so that the emulsified oil is promoted to float upwards, and the emulsified oil is prevented from being extruded by the scum, returning to the water again and causing the oil content of the water to exceed the standard.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a nanoscale microbubble flotation wastewater treatment device. Background Technology

[0002] Air flotation wastewater treatment equipment is a physical-chemical water treatment device based on bubble buoyancy separation. It is specifically designed to remove suspended solids, emulsified oil, colloids, algae and other pollutants in water that have a specific gravity close to that of water and are difficult to remove by sedimentation. It achieves efficient solid-liquid separation and is widely used in municipal and industrial wastewater treatment and water supply pretreatment.

[0003] A large number of nanoscale microbubbles (20–50 μm) are generated through pressurized dissolved air, vortex impeller shearing, electrolysis and other methods. The bubbles and pollutant particles form a composite with an overall density less than that of water. The scum is scraped off by a scum scraper or scraper, as in the patent with publication number CN114229942B.

[0004] The existing air flotation equipment has the following technical problems in use: First, after the emulsified oil breaks down, it has high viscosity and low density. When the scraper is scraping the sludge, more and more sludge accumulates on the scraper, which easily pushes the oil downwards, causing it to sink into the water and escape the scraper's cleaning range. The oil then returns to the water, becoming emulsified oil again, resulting in excessive oil content in the water.

[0005] Secondly, in order to prevent the oil from leaving the cleaning range of the scraper, it is generally necessary to adjust the position of the scraper so that it extends into the liquid surface. As the scraper extends into the liquid surface, the amount of water scraped off is prone to exceed the standard, that is, most of the scraped-off water is water, which leads to an increase in the water content of the sludge tank and increases the difficulty of subsequent sludge pressing and oil removal in the sludge tank. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a nanoscale microbubble-type air flotation wastewater treatment device.

[0007] The objective of this invention can be achieved through the following technical solutions: A nanoscale microbubble-type dissolved air flotation (DAF) wastewater treatment device includes a DAF tank and a guide plate mounted on the DAF tank. A transmission assembly is installed on one side of the DAF tank, and a U-shaped sleeve is slidably mounted on the guide plate. The transmission assembly is connected to the U-shaped sleeve via a transmission rod, and a scraper assembly is installed inside the U-shaped sleeve. The DAF tank includes a reaction tank body and an inlet and an outlet installed at the bottom of the reaction tank body. The inlet is connected to a dissolved air cylinder, and a sludge discharge port is opened on one side of the top of the reaction tank body. A liquid-blocking assembly is installed on the sludge discharge port. The scraper assembly includes a slider slidably mounted inside the U-shaped sleeve, a scraper is installed at the bottom of the slider, and an inclined perforated plate is installed on the scraper. The guide plate includes a side plate and a flat groove and an inclined sliding groove opened on the side plate. The flat groove and the inclined sliding groove are connected, and the slider is connected to the inclined sliding groove via a guide block.

[0008] As a further aspect of the present invention: a spring is installed on the slider, and the slider is connected to the inner wall of the U-shaped sleeve through the spring.

[0009] As a further embodiment of the present invention: the liquid-blocking assembly includes a baffle, a guide sleeve is installed on the side wall of the flotation tank, a telescopic guide rod is slidably installed inside the guide sleeve, and the telescopic guide rod is connected to the baffle.

[0010] As a further aspect of the present invention: a second strip magnet is installed on the baffle, and a first strip magnet is built into the scraper, with the first strip magnet and the second strip magnet repelling each other.

[0011] As a further aspect of the present invention: a second block magnet is installed on the top of the guide block, and a first block magnet is installed at the end of the flat groove. The first block magnet and the second block magnet repel each other.

[0012] As a further aspect of the present invention: the transmission assembly includes a motor installed on the side wall of the reaction tank, the output end of the motor is connected to a lead screw, and the lead screw is connected to a transmission rod for transmission.

[0013] As a further embodiment of the present invention: a bottom sealing gasket is installed at the bottom of the scraper, and a side sealing gasket is installed on the side wall of the scraper.

[0014] The beneficial effects of this invention are: (1) In this invention, the slag scraping assembly is driven by the transmission assembly to move towards the slag discharge port. At this time, the guide block cooperates with the inclined slide groove. As the scraper gradually moves towards the slag discharge port, the slider moves down along the slide groove on the U-shaped slide sleeve. The scraper extends into the liquid surface, and the inclined perforated plate presses down the slag floating on the liquid surface, so that the slag is pressed into the bottom of the liquid surface. At this time, the emulsified oil after demulsification floats on the liquid surface through the filter holes on the inclined perforated plate due to its low density, which promotes the emulsified oil to float up and prevents the emulsified oil from being squeezed by the slag, causing the emulsified oil to return to the water again, resulting in the oil content of the water exceeding the standard.

[0015] (2) In this invention, the scraper moves closer to the slag discharge port, and the slag pushed by the scraper increases. The baffle blocks the slag discharge port, reducing the water output and preventing the water output from exceeding the standard. When the scraper approaches the second bar magnet, the first bar magnet inside the scraper repels the second bar magnet, thereby causing the baffle to move away from the slag discharge port, and pushing the demulsified emulsified oil and slag out of the reaction tank from the slag discharge port in sequence.

[0016] (3) When the guide block of the present invention moves to the end of the inclined trough, the scraper moves down, and the first and second strip magnets built into the first strip magnet are not flush. The repulsive force between the first and second strip magnets is relatively small, and the opening of the slag discharge port is small, which causes the emulsified oil to be discharged from the slag discharge port first. As the scraper continues to move, the scraper moves down to the bottom. At this time, the guide block slides to the flat trough, and the scraper drives the scum pressed by the inclined perforated plate to rise and leave the liquid surface. At the same time, when the guide block cooperates with the flat trough, the first and second strip magnets built into the scraper are flush. The repulsive force between the first and second strip magnets is the greatest, and the opening of the slag discharge port is the largest, which causes the scum on the scraper to be discharged through the slag discharge port in one go.

[0017] Existing technology discharges oil and sludge together into a sludge tank through a sludge discharge port, and the sludge tank requires subsequent oil removal treatment. This invention separates oil and sludge by first discharging emulsified oil and then discharging floating sludge, eliminating the need for subsequent oil removal in the sludge tank and reducing post-processing steps. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the connection structure between the U-shaped sliding sleeve and the guide plate; Figure 4 This is a schematic diagram of the connection structure between the U-shaped sliding sleeve and the slag scraper assembly; Figure 5 This is a cross-sectional view of the scraper structure; Figure 6 This is a schematic diagram of the liquid-blocking assembly structure; Figure 7 This is a schematic diagram of the connection structure between the guide sleeve and the telescopic guide rod; Figure 8 This is a schematic diagram of the overall structure of the liquid-blocking assembly; Figure 9 This is a schematic diagram of the slag scraping status of the slag scraping component; Figure 10 This is a schematic diagram of the structure of block magnet one and block magnet two.

[0020] In the diagram: 1. Flotation tank; 101. Reaction tank body; 102. Liquid inlet; 103. Liquid outlet; 104. Slag outlet; 2. Base; 3. Transmission assembly; 301. Motor; 302. Lead screw; 4. Dissolved air cylinder; 5. Guide trough plate; 501. Side plate; 502. Flat trough; 503. Inclined sliding trough; 504. Block magnet one; 6. Transmission rod; 7. U-shaped sliding sleeve; 8. Slag scraping assembly; 801. Scraper; 802. Side sealing gasket; 803. Bottom sealing gasket; 804. Inclined perforated plate; 805. Strip magnet one; 806. Guide block; 807. Block magnet two; 808. Sliding block; 809. Spring; 9. Liquid blocking assembly; 901. Baffle; 902. Guide sleeve; 903. Telescopic guide rod; 904. Strip magnet two. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-10 As shown, this invention is a nanoscale microbubble-type dissolved air flotation wastewater treatment device, which includes a dissolved air flotation tank 1 and a guide plate 5 installed on the dissolved air flotation tank 1. A transmission assembly 3 is installed on one side of the dissolved air flotation tank 1, and a U-shaped sliding sleeve 7 is slidably installed on the guide plate 5. The transmission assembly 3 is connected to the U-shaped sliding sleeve 7 through a transmission rod 6, and a scraping assembly 8 is installed inside the U-shaped sliding sleeve 7. The dissolved air flotation tank 1 includes a reaction tank body 101 and an inlet 102 and an outlet 103 installed at the bottom of the reaction tank body 101. The inlet 102 is connected to a dissolved air cylinder 4, and the reaction... A slag discharge port 104 is provided on one side of the top of the pool body 101, and a liquid-blocking component 9 is installed on the slag discharge port 104; the slag scraping component 8 includes a slider 808 slidably installed inside the U-shaped sliding sleeve 7, a scraper 801 is installed at the bottom of the slider 808, and an inclined perforated plate 804 is installed on the scraper 801; the guide plate 5 includes a side plate 501 and a flat groove 502 and an inclined sliding groove 503 opened on the side plate 501, the flat groove 502 and the inclined sliding groove 503 are connected, and the slider 808 is connected to the inclined sliding groove 503 through a guide block 806.

[0023] Specifically, a spring 809 is installed on the slider 808, and the slider 808 is connected to the inner wall of the U-shaped sleeve 7 through the spring 809. Specifically, a second block magnet 807 is installed on the top of the guide block 806, and a first block magnet 504 is installed at the end of the flat groove 502; the first block magnet 504 and the second block magnet 807 repel each other. Specifically, the transmission assembly 3 includes a motor 301 installed on the side wall of the reaction tank body 101; the output end of the motor 301 is connected to a lead screw 302, and the lead screw 302 is connected to the transmission rod 6. A base 2 is installed at the bottom of the flotation tank 1, which supports the flotation tank 1 for easy transportation.

[0024] It should be noted that when treating wastewater, flocculants (PAC / PAM + demulsifier) ​​need to be added to the wastewater to form flocs from suspended solids and break up emulsified oils to float to the surface, thereby improving the flotation efficiency. A base 2 is installed at the bottom of the flotation tank 1, which supports the flotation tank 1 for easy transportation.

[0025] In use, the dissolved air cylinder 4 has a built-in microbubble generator, and a water pump is connected to the top of the dissolved air cylinder 4. The water pump sends sewage into the dissolved air cylinder 4, causing the bubbles generated by the microbubble generator to dissolve in the sewage. The flocculants and oil in the sewage mix with the microbubbles in the shortest possible time. Then, the dissolved air mixed water is discharged into the reaction tank 101 through the liquid inlet 102. After the dissolved air mixed water enters the reaction tank 101, the microbubbles adhere to the flocculants and float to the surface under the action of the bubbles, forming scum.

[0026] When motor 301 starts, it drives lead screw 302 to rotate. Lead screw 302 drives U-shaped sliding sleeve 7 and slag scraping assembly 8 on it to move towards slag discharge port 104 through transmission rod 6. At this time, guide blocks 806 on both sides of slider 808 slide in cooperation with inclined slide groove 503, and scrape off the floating slag on the liquid surface through the movement of scraper 801.

[0027] Specifically, as the scraper 801 moves, the scum on the scraper 801 gradually increases, and the demulsified oil is easily squeezed downwards, leaving the cleaning range of the scraper 801. Based on this, the present invention, on the one hand, uses the guide block 806 in cooperation with the inclined slide groove 503. As the scraper 801 gradually moves towards the scum discharge port 104, the slider 808 moves downwards along the slide groove on the U-shaped sliding sleeve 7, and the scraper 801 extends into the liquid surface, increasing the cleaning range of the scraper 801.

[0028] On the other hand, as the scraper 801 continues to move and descend, the inclined perforated plate 804 presses down the scum floating on the liquid surface, causing the scum to be pressed into the bottom of the liquid. At this time, the demulsified oil floats to the liquid surface through the filter holes of the inclined perforated plate 804 due to its low density, which promotes the emulsified oil to float and prevents the emulsified oil from being squeezed by the scum, causing the emulsified oil to return to the water and resulting in the oil content of the water exceeding the standard.

[0029] It should be noted that the amount of water entering through the inlet 102 and exiting through the outlet 103 is controlled to be equal, thereby maintaining the liquid level balance in the reaction tank 101.

[0030] See Figures 6-10 The liquid-blocking assembly 9 includes a baffle 901, a guide sleeve 902 installed on the side wall of the flotation tank 1, and a telescopic guide rod 903 slidably installed inside the guide sleeve 902. The telescopic guide rod 903 is connected to the baffle 901. Specifically, a second strip magnet 904 is installed on the baffle 901, and a first strip magnet 805 is built into the scraper 801. The first strip magnet 805 and the second strip magnet 904 repel each other.

[0031] It should be noted that as the scraper 801 moves downward, it gradually extends into the liquid surface, increasing the amount of water scraped out. This can easily lead to the scraping out exceeding the standard, meaning that most of what is scraped out is water. This increases the moisture content of the slag tank, making subsequent sludge pressing and oil removal more difficult.

[0032] It should be noted that when the guide block 806 is engaged with the flat groove 502, the first strip magnet 805 and the second strip magnet 904 inside the scraper 801 are flush.

[0033] In use, the present invention uses a scraper 801 to move closer to the slag discharge port 104. The scraper 801 pushes up more slag, which is then blocked by the baffle 901, reducing the water output. When the scraper 801 approaches the second bar magnet 904, the first bar magnet 805 inside the scraper 801 repels the second bar magnet 904, thereby causing the baffle 901 to disengage from the slag discharge port 104, and pushing the demulsified emulsified oil and slag out of the reaction tank 101 from the slag discharge port 104 in sequence.

[0034] Specifically, when the guide block 806 on the scraper 801 moves to the tail end of the inclined chute 503, the scraper 801 moves downward. The bar magnet 805 and the bar magnet 904 inside the bar magnet 805 are not flush. The repulsive force between the bar magnet 805 and the bar magnet 904 is relatively small, and the opening of the slag discharge port 104 is small. As the scraper 801 moves downward, the inclined perforated plate 804 presses the scum into the bottom of the liquid surface. At this time, the emulsified oil after demulsification floats on the liquid surface, realizing the stratification of oil and scum, and prompting the emulsified oil to be discharged from the slag discharge port 104 first.

[0035] This invention controls the layering of oil and sludge by using an inclined perforated plate 804, and effectively reduces oil residue when scraping sludge by a scraper 801. Compared with the existing scraping method where oil is at the bottom and sludge is at the top, this invention can effectively prevent the problem of oil being easily washed away by air bubbles at the bottom of the sludge.

[0036] As scraper 801 continues to move, it descends to the bottom, where the bottom sealing gasket 803 adheres to the inner wall of the reaction tank 101. At this time, under the action of spring 809, guide block 806 slides through the vertical groove between inclined slide groove 503 and horizontal groove 502 to horizontal groove 502, and scraper 801 moves accordingly. As scraper 801 moves upward, it causes the scum pressed by inclined perforated plate 804 to rise and detach from the liquid surface. Simultaneously, when guide block 806 engages with horizontal groove 502, the bar magnet 805 and bar magnet 904 inside scraper 801 are flush, and the repulsive force between bar magnet 805 and bar magnet 904 is at its maximum. The scum discharge port 104 opens to its maximum, causing the scum on scraper 801 to be discharged through the scum discharge port 104 in one go.

[0037] The existing technology discharges oil and sludge together into the sludge tank through the sludge discharge port 104, and the sludge tank needs to be degreased afterward. The present invention separates oil and sludge by first discharging the emulsified oil and then the floating sludge, eliminating the need for subsequent oil removal in the sludge tank and reducing post-processing steps.

[0038] When the guide block 806 engages with the flat groove 502, the transmission assembly 3 drives the scraper assembly 8 to reset. When the guide block 806 moves to the initial position, the first block magnet 504 and the second block magnet 807 on the guide block 806 repel each other. The first block magnet 504 pushes the guide block 806 to move to the inclined slide groove 503, completing the switching of the guide block 806 between the flat groove 502 and the inclined slide groove 503.

[0039] It should be noted that if there is a lot of scum in the sewage, the scum discharge port 104 is in the normally open state.

[0040] See Figures 3-4 The bottom of the scraper 801 is equipped with a bottom sealing gasket 803, and the side sealing gasket 802 is installed on the side wall of the scraper 801.

[0041] It should be noted that during the slag scraping process, the side sealing gaskets 802 on both sides of the scraper 801 are attached to the inner wall of the reaction tank body 101. At the same time, the V-shaped groove at the bottom of the scraper 801 is designed to gather the oil and slag towards the center of the scraper 801, preventing the oil from overflowing from both sides of the scraper 801, thus forming two oil strips on the liquid surface.

[0042] Working principle of the invention: Sludge removal process: The dissolved air cylinder 4 has a built-in microbubble generator, and a water pump is connected to the top of the dissolved air cylinder 4. The water pump sends sewage into the dissolved air cylinder 4, so that the bubbles generated by the microbubble generator dissolve in the sewage. The flocculents and oil in the sewage mix with the microbubbles in the shortest possible time. Then, the dissolved air mixed water is discharged into the reaction tank 101 through the liquid inlet 102. After the dissolved air mixed water enters the reaction tank 101, the microbubbles adhere to the flocculents and float to the surface under the action of the bubbles to form sludge. The transmission component 3 drives the U-shaped sliding sleeve 7 and the sludge removal component 8 on it to move towards the sludge discharge port 104 through the transmission rod 6. At this time, the guide blocks 806 on both sides of the slider 808 slide in cooperation with the inclined sliding groove 503, and the sludge on the liquid surface is scraped off by the movement of the scraper 801.

[0043] Specifically, as the scraper 801 moves, the scum on the scraper 801 gradually increases, and the demulsified oil is easily squeezed downwards, leaving the cleaning range of the scraper 801. Based on this, the present invention, on the one hand, uses the guide block 806 in cooperation with the inclined slide groove 503. As the scraper 801 gradually moves towards the scum discharge port 104, the slider 808 moves downwards along the slide groove on the U-shaped sliding sleeve 7, and the scraper 801 extends into the liquid surface, increasing the cleaning range of the scraper 801.

[0044] On the other hand, as the scraper 801 continues to move and descend, the inclined perforated plate 804 presses down the scum floating on the liquid surface, causing the scum to be pressed into the bottom of the liquid. At this time, the demulsified oil floats to the liquid surface through the filter holes of the inclined perforated plate 804 due to its low density, which promotes the emulsified oil to float and prevents the emulsified oil from being squeezed by the scum, causing the emulsified oil to return to the water and resulting in the oil content of the water exceeding the standard.

[0045] Slag removal process: In this invention, the scraper 801 moves closer to the slag discharge port 104, increasing the amount of slag pushed by the scraper 801. This slag is then blocked by the baffle 901, reducing the water output. When the scraper 801 approaches the second bar magnet 904, the first bar magnet 805 inside the scraper 801 repels the second bar magnet 904, thereby causing the baffle 901 to disengage from the slag discharge port 104. This allows the demulsified emulsified oil and slag to be sequentially pushed out of the slag discharge port 104 from the reaction tank 101.

[0046] Specifically, when the guide block 806 on the scraper 801 moves to the tail end of the inclined chute 503, the scraper 801 moves downward. The bar magnet 805 and the bar magnet 904 inside the bar magnet 805 are not flush. The repulsive force between the bar magnet 805 and the bar magnet 904 is relatively small, and the opening of the slag discharge port 104 is small. As the scraper 801 moves downward, the inclined perforated plate 804 presses the scum into the bottom of the liquid surface. At this time, the emulsified oil after demulsification floats on the liquid surface, realizing the stratification of oil and scum, and prompting the emulsified oil to be discharged from the slag discharge port 104 first.

[0047] This invention controls the layering of oil and sludge by using an inclined perforated plate 804, and effectively reduces oil residue when scraping sludge by a scraper 801. Compared with the existing scraping method where oil is at the bottom and sludge is at the top, this invention can effectively prevent the problem of oil being easily washed away by air bubbles at the bottom of the sludge.

[0048] As scraper 801 continues to move, it descends to the bottom, where the bottom sealing gasket 803 adheres to the inner wall of the reaction tank 101. At this time, under the action of spring 809, guide block 806 slides through the vertical groove between inclined slide groove 503 and horizontal groove 502 to horizontal groove 502, and scraper 801 moves accordingly. As scraper 801 moves upward, it causes the scum pressed by inclined perforated plate 804 to rise and detach from the liquid surface. Simultaneously, when guide block 806 engages with horizontal groove 502, the bar magnet 805 and bar magnet 904 inside scraper 801 are flush, and the repulsive force between bar magnet 805 and bar magnet 904 is at its maximum. The scum discharge port 104 opens to its maximum, causing the scum on scraper 801 to be discharged through the scum discharge port 104 in one go.

[0049] The existing technology discharges oil and sludge together into the sludge tank through the sludge discharge port 104, and the sludge tank needs to be degreased afterward. The present invention separates oil and sludge by first discharging the emulsified oil and then the floating sludge, eliminating the need for subsequent oil removal in the sludge tank and reducing post-processing steps.

[0050] When the guide block 806 engages with the flat groove 502, the transmission assembly 3 drives the scraper assembly 8 to reset. When the guide block 806 moves to the initial position, the first block magnet 504 and the second block magnet 807 on the guide block 806 repel each other. The first block magnet 504 pushes the guide block 806 to move to the inclined slide groove 503, completing the switching of the guide block 806 between the flat groove 502 and the inclined slide groove 503.

Claims

1. A nanoscale microbubble-based air flotation wastewater treatment device, characterized in that, Includes an air flotation tank (1) and a guide plate (5) installed on the air flotation tank (1). A transmission assembly (3) is installed on one side of the air flotation tank (1). A U-shaped sleeve (7) is slidably installed on the guide plate (5). The transmission assembly (3) is connected to the U-shaped sleeve (7) through a transmission rod (6). A slag scraping assembly (8) is installed inside the U-shaped sleeve (7). The flotation tank (1) includes a reaction tank body (101) and an inlet (102) and a outlet (103) installed at the bottom of the reaction tank body (101). The inlet (102) is connected to the dissolved air cylinder (4). A slag discharge port (104) is opened on one side of the top of the reaction tank body (101). A liquid-blocking component (9) is installed on the slag discharge port (104). The slag scraping assembly (8) includes a slider (808) slidably installed inside a U-shaped sleeve (7), a scraper (801) is installed at the bottom of the slider (808), and an inclined perforated plate (804) is installed on the scraper (801). The guide plate (5) includes a side plate (501) and a flat groove (502) and an inclined groove (503) opened on the side plate (501). The flat groove (502) and the inclined groove (503) are connected. The slider (808) is connected to the inclined groove (503) through a guide block (806).

2. The nanoscale microbubble-type air flotation wastewater treatment device according to claim 1, characterized in that, A spring (809) is installed on the slider (808), and the slider (808) is connected to the inner wall of the U-shaped sleeve (7) through the spring (809).

3. The nanoscale microbubble-type air flotation wastewater treatment device according to claim 1, characterized in that, The liquid-blocking assembly (9) includes a baffle (901), a guide sleeve (902) is installed on the side wall of the flotation tank (1), a telescopic guide rod (903) is slidably installed inside the guide sleeve (902), and the telescopic guide rod (903) is connected to the baffle (901).

4. The nanoscale microbubble-type air flotation wastewater treatment device according to claim 3, characterized in that, A second strip magnet (904) is installed on the baffle (901), and a first strip magnet (805) is built into the scraper (801). The first strip magnet (805) and the second strip magnet (904) repel each other.

5. The nanoscale microbubble-type air flotation wastewater treatment device according to claim 1, characterized in that, The top of the guide block (806) is equipped with a second block magnet (807), and the end of the flat groove (502) is equipped with a first block magnet (504). The first block magnet (504) and the second block magnet (807) repel each other.

6. The nanoscale microbubble-type air flotation wastewater treatment device according to claim 1, characterized in that, The transmission assembly (3) includes a motor (301) installed on the side wall of the reaction tank body (101), the output end of the motor (301) is connected to a lead screw (302), and the lead screw (302) is connected to the transmission rod (6) for transmission.

7. The nanoscale microbubble-type air flotation wastewater treatment device according to claim 1, characterized in that, The bottom of the scraper (801) is fitted with a bottom sealing gasket (803), and the side sealing gasket (802) is fitted on the side wall of the scraper (801).

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