A flotation machine based on high-concentration wastewater treatment

Abstract

The invention relates to the technical field of sewage treatment, and discloses an air flotation machine based on high-concentration wastewater treatment. The conveying assembly is driven by a scraping roller to transport the suspended matter in the suspended layer in the treatment chamber to a scum tank. Since the bottom of the conveying assembly is located below the suspended layer, the suspended matter constituting the suspended layer can completely fall on the conveying surface of the conveying assembly as the suspended layer flows, and the conveying surface fully conveys the suspended matter to the inner side of the scum tank, thereby avoiding the suspended layer from being left behind due to insufficient cleaning. Furthermore, since the bottom of the conveying assembly is located below the suspended layer, when the suspended matter loses bubbles due to shaking and settles, it will also fall on the surface of the conveying assembly, thereby avoiding the suspended matter from settling to the bottom of the treatment chamber and being discharged through a water outlet. The invention solves the problem that the scraping mechanism of the conventional air flotation machine does not scrape the scum thoroughly and causes the suspended layer to shake during the scraping process, which easily causes the suspended matter in the lower layer to lose bubbles, resulting in an increase in density and sinking to the bottom.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to an air flotation machine based on high-concentration wastewater treatment. Background Art

[0002] The flotation machine based on wastewater treatment is a device that uses the principle of buoyancy to treat wastewater. It produces bubbles that attach to suspended particles in the wastewater to reduce their density and form buoyancy, so that these particles float to the water surface, thereby achieving wastewater treatment and purification. This device combines flotation technology and is usually used to remove suspended matter, grease and other pollutants in wastewater. In the flotation machine, there is a reaction chamber for adding flocculants and coagulants to react with sewage to generate suspended matter, and a treatment chamber for adding dissolved air water to make bubbles attach to the surface of suspended matter. On the upper side of the treatment chamber, there is usually a scraping mechanism, which includes a circulating scraper for scraping suspended matter floating on the water surface into a scum tank, thereby completing the solid-liquid separation in the wastewater.

[0003] A patent document with publication number CN218709354U discloses a wastewater treatment flotation machine, including a conveyor belt and a dust collecting box, both sides of the conveyor belt and the inner walls of both sides of the box body are rotatably connected, the top and bottom of the conveyor belt are fixedly connected with a plurality of scrapers, the scrapers and the conveyor belt are fixedly connected with a first spring, the top inner wall of the other end of the box body is fixedly connected with the outer wall of one end of the dust collecting box, and the top outer wall of the other end of the dust collecting box is fixedly connected with a first guide plate, so as to achieve the purpose of slag removal;

[0004] In the above scheme, since the thickness of the suspended matter depends on the concentration of the suspended matter, especially in high-concentration wastewater, the thickness distribution of the suspended matter is not uniform, and the lower side height of the existing scraper is fixed, which is not convenient to adapt to the thickness of the suspended matter. In actual use, there are two problems: First, the scraping of the suspended matter into the scum tank is not thorough enough, and it is easy to be left inside the treatment chamber; Second, in the process of hanging the scraper, it is easy to cause the suspended layer floating on the water surface to shake. For the suspended matter at the bottom of the suspended layer, the shaking is easy to cause the bubbles on its surface to detach, which is easy to cause the suspended matter to lose bubbles and become denser, and sink to the bottom. The position where it sinks to the bottom is the outlet, which leads to poor sewage treatment.

[0005] To this end, the present invention provides an air flotation machine based on high-concentration wastewater treatment. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: an air flotation machine based on high-concentration wastewater treatment, comprising an air flotation machine body, the air flotation machine body comprising a box body, the box body is provided with a scum groove for collecting suspended matter, and a treatment chamber for bubbles to adhere to the surface of the suspended matter, the treatment chamber is adjacent to the scum groove, and a scum removal mechanism is provided above the box body;

[0008] The slag removal mechanism includes a conveying component, which conveys from bottom to top in an inclined surface. The bottom of the conveying component is located inside the processing chamber and below the suspension layer. The top of the conveying component is located above the slag trough. The transmission width of the conveying component is consistent with the width of the processing chamber. The outer surface of the box is provided with a driving mechanism for driving the slag removal mechanism.

[0009] Preferably, the conveying assembly includes a conveying roller B rotatably mounted on the inner wall of the processing chamber, a conveying roller A rotatably mounted above the scum trough, and a conveyor belt sleeved on the surfaces of the conveying roller A and the conveying roller B, wherein the outer surface of the conveying belt is provided with a plurality of protrusions.

[0010] Preferably, a rotatable scraping roller is attached to the upper part of the scum trough and the lower surface of the conveyor belt. The scraping roller is driven by a driving mechanism. The rotation speed of the outer surface of the scraping roller is greater than the moving speed of the conveyor belt, and the scraping roller moves in opposite directions to the conveyor belt at the attached position.

[0011] Preferably, a cleaning mechanism is provided in the middle of the lower surface of the conveyor belt, and the cleaning mechanism includes a water storage tank arranged below the conveyor belt, and two guide rollers A are symmetrically arranged on both sides of the upper surface of the water storage tank along the length direction, and a guide roller C and a cleaning roller B are rotatably arranged at the bottom of the water storage tank. The two guide rollers A and the cleaning roller B and guide roller C are parallel to each other, and the conveyor belt passes around the guide roller A, guide roller C and another guide roller A in sequence.

[0012] Preferably, clean water is provided in the water storage tank and submerges the lower surface of the conveyor belt wrapped around the lower side of the guide roller C. The cleaning roller B is arranged in the clean water and is close to the surface of the conveyor belt near the side where the scraper roller is located. The cleaning roller B is driven by a driving mechanism. The rotation speed of the outer surface of the cleaning roller B is greater than the moving speed of the conveyor belt and is opposite to the moving direction of the conveyor belt contact position.

[0013] Preferably, the two sides of the conveyor belt are movably fitted with the inner walls of the water storage tank on both sides, and the upper surface of the clean water in the water storage tank is separated by the conveyor belt.

[0014] Preferably, a water outlet trough and a water inlet trough are provided on the side surface of the box body, the water outlet trough is connected to the water storage tank, the water inlet trough is connected to the treatment chamber, the water inlet trough is provided on the side of the inner wall of the treatment chamber away from the slag removal mechanism, the vertical height of the water inlet trough is lower than the water outlet trough and higher than the height of the suspended layer in the box body, and a water channel is connected between the outer surface of the box body, the water outlet trough and the water inlet trough.

[0015] Preferably, a partition is provided in the water outlet trough, and a flooding port is provided on the surface of the partition above the cleaning roller B. A water inlet pipe is provided on the surface of the box body away from the water channel, and both ends of the water inlet pipe are respectively connected to the bottom of the box body and the inner side of the water storage tank, and a liquid pump is connected to the surface of the water inlet pipe.

[0016] Preferably, the driving mechanism includes a motor fixedly arranged on the outside of the box, and pulley A, pulley B, pulley C and pulley D rotatably arranged on the outer surface of the box, the pulley A is fixedly connected to the rotating shaft of the conveying roller A, the pulley B and pulley C are fixedly connected to the rotating shaft of the scraping roller, the pulley D is fixedly connected to the rotating shaft of the cleaning roller B, the output end of the motor is transmission connected to the pulley A and pulley B through a belt, the pulley C is transmission connected to the pulley D, and the diameter of the pulley A is larger than the diameters of the pulleys B, C and D.

[0017] Preferably, both ends of the rotating shaft of the conveying roller B are respectively connected to an adjusting mechanism, and an arc-shaped groove for movably installing the adjusting mechanism is opened inside the box body, and the arc of the arc-shaped groove is the movable area in which the conveying roller B can tighten the conveyor belt. The adjusting mechanism includes a connecting piece embedded and slidably arranged on the inner side of the water inlet groove, and mounting rings are respectively arranged at both ends of the connecting piece. The rotating shaft of the conveying roller B is rotatably installed in the upper mounting ring, and a pushing column is rotatably arranged in the other mounting ring. A hydraulic rod is fixedly connected to the surface of one side of the pushing column, and one end of the hydraulic rod is fixedly connected to a support seat. The support seat is rotatably installed on the inner wall of the box body and is on the same inclined plane at both ends of the arc-shaped groove. A baffle is fixedly arranged on the inner side of the conveyor belt and above the guide roller A close to the conveying roller B.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The flotation machine based on high-concentration wastewater treatment described in the present invention drives the conveying component to work through a scraper roller to transport the suspended matter in the suspended layer in the treatment chamber to the scum tank. Since the bottom of the conveying component is located below the suspended layer, the suspended matter constituting the suspended layer can completely fall on the conveying surface of the conveying component as the suspended layer flows, and the conveying surface fully conveys the suspended matter to the inner side of the scum tank, thereby avoiding residue caused by insufficient cleaning of the suspended layer. Moreover, since the bottom of the conveying component is located below the suspended layer, when there is suspended matter that loses bubbles due to shaking and settles, it will also fall on the surface of the conveying component, thereby avoiding its settling to the bottom of the treatment chamber and being discharged through the water outlet.

[0020] 2. The flotation machine based on high-concentration wastewater treatment described in the present invention is responsible for cleaning the suspended matter adhering to the surface of the conveyor belt to the inside of the scum tank through the rotation of the scraper roller, thereby cleaning the surface of the conveyor belt and avoiding the movement of the conveyor belt. The two sides of the conveyor belt are fitted with the inner walls of the two sides of the water storage tank to separate the surface of the clean water, so that the suspended matter cleaned by the cleaning roller B is concentrated on the clean water surface on one side, avoiding it from moving to the clean water surface on the side of the conveyor belt where the clean water is discharged, causing the conveyor belt to carry the floating suspended matter back to the treatment room during the water discharge process.

[0021] 3. The flotation machine based on high-concentration wastewater treatment described in the present invention adjusts the position of the connecting piece on the inner side of the arc groove by extending and retracting the hydraulic rod, so as to adjust the height of the conveying roller B. Therefore, when the concentration of suspended matter in the wastewater in the box changes, causing the lower side of the suspension layer to become lower, the height of the conveying roller B can be appropriately adjusted so that the height of the conveying roller B can always be kept below the suspension layer. The baffle is set to prevent the conveyor belt on the upper surface of the guide roller A close to the conveying roller B from contacting itself above when adjusting the height of the conveying roller B, causing excessive wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the front anatomical structure of the box body of the present invention;

[0024] Figure 3 It is a schematic diagram of the anatomical structure of the back side of the box body of the present invention;

[0025] Figure 4 It is a schematic diagram of the slag removal mechanism and the suspension layer position structure of the present invention;

[0026] Figure 5 It is a schematic diagram of the connection structure between the cleaning mechanism and the water conduit of the present invention;

[0027] Figure 6It is a perspective structural diagram of the partition of the present invention;

[0028] Figure 7 It is a schematic diagram of the water level structure in the water storage tank of the present invention;

[0029] Figure 8 It is a schematic diagram of the connection structure between the adjustment mechanism and the arc groove of the present invention.

[0030] In the figure: 1. box body; 11. water outlet trough; 12. water inlet trough; 13. arc trough; 2. slag removal mechanism; 21. conveyor belt; 22. conveyor roller A; 23. conveyor roller B; 3. scraper roller; 4. cleaning mechanism; 41. guide roller A; 42. cleaning roller B; 43. guide roller C; 44. water storage tank; 45. partition; 46. flooding port; 5. water inlet pipe; 51. liquid pump; 61. motor; 62. pulley A; 63. pulley B; 64. pulley C; 65. pulley D; 7. adjustment mechanism; 71. connecting piece; 72. push column; 73. hydraulic rod; 74. support seat; 8. baffle; 9. water channel. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods. Embodiment 1

[0032] like Figure 1-Figure 4 As shown, an air flotation machine based on high-concentration wastewater treatment includes an air flotation machine body, the air flotation machine body includes a box body 1, a scum tank for collecting suspended matter is provided in the box body 1, and a treatment chamber for bubbles to adhere to the surface of the suspended matter, the treatment chamber is adjacent to the scum tank, and a slag removal mechanism 2 is provided above the box body 1;

[0033] The slag removal mechanism 2 includes a conveying component, which conveys from bottom to top in an inclined surface. The bottom of the conveying component is located inside the processing chamber and below the suspension layer. The top of the conveying component is located above the slag trough. The transmission width of the conveying component is consistent with the width of the processing chamber. The outer surface of the box body 1 is provided with a driving mechanism for driving the slag removal mechanism 2.

[0034] Specifically, the conveying component is driven by the scraper roller 3 to transport the suspended matter in the suspended layer in the treatment chamber to the scum tank. Since the bottom of the conveying component is located below the suspended layer, the suspended matter constituting the suspended layer can completely fall on the conveying surface of the conveying component as the suspended layer flows, and the conveying surface fully conveys the suspended matter to the inner side of the scum tank to avoid residue caused by insufficient cleaning of the suspended layer. Because the bottom of the conveying component is located below the suspended layer, when the suspended matter is shaken and loses bubbles and settles, it will also fall on the surface of the conveying component to avoid settling to the bottom of the treatment chamber and being discharged through the water outlet.

[0035] like Figure 1-Figure 4 As shown, the conveying assembly includes a conveying roller B23 rotatably mounted on the inner wall of the processing chamber, a conveying roller A22 rotatably mounted above the scum trough, and a conveying belt 21 sleeved on the surface of the conveying roller A22 and the conveying roller B23, and the outer surface of the conveying belt 21 is provided with multiple protrusions.

[0036] Specifically, the conveyor belt 21 is moved by the rotation of the conveyor roller A22 and the conveyor roller B23, and is responsible for discharging the suspended matter constituting the suspended layer in the processing chamber. The raised surface of the conveyor belt 21 facilitates improving the effect of hanging catkins on the surface of the conveyor belt 21.

[0037] like Figure 2-Figure 3 As shown, a rotatable scraper roller 3 is attached to the upper side of the scum trough and the lower surface of the conveyor belt 21. The scraper roller 3 is driven by a driving mechanism. The rotation speed of the outer surface of the scraper roller 3 is greater than the moving speed of the conveyor belt 21, and the moving directions of the scraper roller 3 and the conveyor belt 21 are opposite.

[0038] Specifically, the scraper roller 3 rotates to clean the suspended matter adhering to the surface of the conveyor belt 21 into the scum tank, thereby cleaning the surface of the conveyor belt 21 and preventing it from returning to the processing chamber along with the movement of the conveyor belt 21 .

[0039] like Figure 2-Figure 7 As shown, a cleaning mechanism 4 is provided at the middle of the lower surface of the conveyor belt 21, and the cleaning mechanism 4 includes a water storage tank 44 provided below the conveyor belt 21, two guide rollers A41 are symmetrically provided on both sides of the upper surface of the water storage tank 44 along the length direction, and a guide roller C43 and a cleaning roller B42 are rotatably provided at the bottom of the water storage tank 44, the two guide rollers A41 and the cleaning roller B42 and the guide roller C43 are parallel to each other, and the conveyor belt 21 passes around the guide roller A41, the guide roller C43 and another guide roller A41 in sequence;

[0040] Clean water is provided in the water storage tank 44 and submerges the lower surface of the conveyor belt 21 wound around the lower side of the guide roller C43. The cleaning roller B42 is set in the clean water and is close to the surface of the conveyor belt 21 near the side where the scraper roller 3 is located. The cleaning roller B42 is driven by a driving mechanism. The rotation speed of the outer surface of the cleaning roller B42 is greater than the moving speed of the conveyor belt 21, and is opposite to the moving direction of the contact position of the conveyor belt 21.

[0041] Specifically, by using the clean water in the water tank 44 and the cleaning roller B42 to clean the surface of the conveyor belt 21 in the clean water, smaller suspended matter can be further prevented from adhering to the surface of the conveyor belt 21 and returning to the processing chamber with the movement of the conveyor belt 21.

[0042] like Figure 5-Figure 7As shown, the two sides of the conveyor belt 21 are movably fitted with the inner walls of the water storage tank 44 on both sides, and the upper surface of the clean water in the water storage tank 44 is separated by the conveyor belt 21.

[0043] Specifically, the two sides of the conveyor belt 21 are fitted with the inner walls of the water storage tank 44, and the upper surface of the clean water is separated, so that the suspended matter cleaned by the cleaning roller B42 is concentrated and floats on the clean water surface on one side, and it is prevented from moving to the clean water surface on the side where the clean water is discharged from the conveyor belt 21, resulting in the floating suspended matter being carried away by the conveyor belt 21 during the water discharge process and returned to the processing room with the movement of the conveyor belt 21.

[0044] like Figure 2-Figure 3 , Figure 5-Figure 7 As shown, a water outlet trough 11 and a water inlet trough 12 are provided on the side surface of the box body 1, the water outlet trough 11 is connected to the water storage tank 44, the water inlet trough 12 is connected to the processing chamber, the water inlet trough 12 is provided on the inner wall of the processing chamber away from the slag removal mechanism 2, the vertical height of the water inlet trough 12 is lower than the water outlet trough 11, and higher than the height of the suspended layer in the box body 1, and a water conduit 9 is connected between the outer surface of the box body 1, the water outlet trough 11 and the water inlet trough 12;

[0045] A partition 45 is arranged in the water outlet trough 11, and a flooding port 46 is provided on the surface of the partition 45 above the cleaning roller B42. A water inlet pipe 5 is arranged on the surface of the box body 1 away from the water channel 9. The two ends of the water inlet pipe 5 are respectively connected to the bottom of the box body 1 and the inner side of the water storage tank 44, and a liquid pump 51 is connected to the surface of the water inlet pipe 5.

[0046] Specifically, by setting the partition 45, the water level of the clean water in the water tank 44 has a height that satisfies the lower surface of the submerged conveyor belt 21 inside the water tank 44, and by the operation of the liquid pump 51, the water inlet pipe 5 draws the water at the bottom of the box body 1 to the inside of the water tank 44, so that the water inside the water tank 44 flows in the direction of the partition 45, and then flows into the water channel 9 through the flooding port 46, and then the water is guided by the water channel 9 to the treatment chamber of the box body 1, so that the suspended matter cleaned in the water tank 44 is transferred to the treatment chamber through the flow of water so as to be collected and treated.

[0047] like Figure 3As shown, the driving mechanism includes a motor 61 fixedly arranged on the outside of the box body 1, and a pulley A62, a pulley B63, a pulley C64 and a pulley D65 rotatably arranged on the outer surface of the box body 1, the pulley A62 is fixedly connected to the rotating shaft of the conveying roller A22, the pulley B63 and the pulley C64 are fixedly connected to the rotating shaft of the scraping roller 3, the pulley D65 is fixedly connected to the rotating shaft of the cleaning roller B42, the output end of the motor 61 is connected to the pulley A62 and the pulley B63 through a belt, the pulley C64 is connected to the pulley D65 through a belt, and the diameter of the pulley A62 is larger than the diameters of the pulleys B63, C64 and D65.

[0048] Specifically, the motor 61 synchronously drives the conveying roller A22, the scraping roller 3 and the cleaning roller B42 to rotate through a transmission connection relationship, and the diameter of the pulley A62 is larger than the diameters of the pulleys B63, C64 and D65, so that the rotation speeds of the pulleys B63, C64 and D65 are greater than that of the pulley A62, thereby causing the speeds of the scraping roller 3 and the cleaning roller B42 to be greater than the rotation speed of the conveying roller A22. Embodiment 2

[0049] like Figure 4 , Figure 8 As shown, compared with Example 1, another embodiment of the present invention is: an adjusting mechanism 7 is respectively connected to the two ends of the rotating shaft of the conveying roller B23, an arc groove 13 for movably installing the adjusting mechanism 7 is opened inside the box 1, and the arc of the arc groove 13 is the movable area of ​​the conveying roller B23 to tighten the conveyor belt 21, the adjusting mechanism 7 includes a connecting member 71 embedded and slidably arranged on the inner side of the water inlet groove 12, and mounting rings are respectively arranged at both ends of the connecting member 71, the rotating shaft of the conveying roller B23 is rotatably installed in the upper mounting ring, and a pushing column 72 is rotatably arranged in the other mounting ring, and a hydraulic rod 73 is fixedly connected to a surface of one side of the pushing column 72, and one end of the hydraulic rod 73 is fixedly connected to a support seat 74, and the support seat 74 is rotatably installed on the inner wall of the box 1, and is on the same inclined plane at both ends of the arc groove 13, and a baffle 8 is fixedly arranged on the inner side of the conveyor belt 21 and above the guide roller A41 on the side close to the conveying roller B23.

[0050] Specifically, the position of the connecting member 71 inside the arc groove 13 is adjusted by extending and retracting the hydraulic rod 73, so as to adjust the height of the conveying roller B23. Therefore, when the concentration of suspended matter in the wastewater in the box 1 changes, causing the lower side of the suspension layer to become lower, the height of the conveying roller B23 can be appropriately adjusted so that the height of the conveying roller B23 can always be kept below the suspension layer.

[0051] The baffle 8 is provided to prevent the conveyor belt 21 on the upper surface of the guide roller A41 close to the conveyor roller B23 from contacting itself above when adjusting the height of the conveyor roller B23, thereby preventing excessive wear.

[0052] Working principle: First, adjust the position of the connecting member 71 on the inner side of the arc groove 13 by extending and retracting the hydraulic rod 73, so that the height of the conveying roller B23 is adjusted below the suspension layer, and then start the motor 61, and synchronously drive the conveying roller A22, the scraping roller 3 and the cleaning roller B42 to rotate through the transmission connection relationship. The conveying belt 21 is moved by the rotation of the conveying roller A22 and the conveying roller B23. The conveying belt 21 is responsible for discharging the suspended matter constituting the suspension layer in the processing chamber, and the rotation of the scraping roller 3 is responsible for cleaning the suspended matter adhering to the surface of the conveying belt 21. Inside the scum tank, the clean water in the water tank 44 and the rotating cleaning roller B42 clean the surface of the conveyor belt 21 in the clean water to clean the smaller suspended matter adhering to the surface of the conveyor belt 21, and then start the liquid pump 51 to make the water inlet pipe 5 pump the water at the bottom of the box body 1 to the inside of the water tank 44, so that the water inside the water tank 44 flows in the direction of the partition 45, and then flows through the flooding port 46 to the water channel 9, and then the water is guided by the water channel 9 to the processing chamber of the box body 1, and the suspended matter cleaned in the water tank 44 is transferred to the processing chamber.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air flotation machine for treating high-concentration wastewater, comprising an air flotation machine body, the air flotation machine body comprising a housing (1), the housing (1) being provided with a scum tank for collecting suspended matter, and a treatment chamber for bubbles to adhere to the surface of the suspended matter, the treatment chamber being adjacent to the scum tank, characterized in that: A slag removal mechanism (2) is provided above the box body (1); The slag removal mechanism (2) comprises a conveying assembly, the conveying assembly is inclined and performs conveying from bottom to top, the bottom of the conveying assembly is located inside the processing chamber and below the suspension layer, the top of the conveying assembly is located above the slag trough, the transmission width of the conveying assembly is consistent with the width of the processing chamber, and the outer surface of the box body (1) is provided with a driving mechanism for driving the slag removal mechanism (2); The conveying assembly comprises a conveying roller B (23) rotatably mounted on the inner wall of the processing chamber, a conveying roller A (22) rotatably mounted above the scum tank, and a conveying belt (21) sleeved on the surfaces of the conveying roller A (22) and the conveying roller B (23), wherein the outer surface of the conveying belt (21) is provided with a plurality of protrusions; A rotatably arranged scraping roller (3) is attached to the upper side of the scum trough and the lower surface of the conveyor belt (21); the scraping roller (3) is driven by a driving mechanism; the rotation speed of the outer surface of the scraping roller (3) is greater than the moving speed of the conveyor belt (21); and the scraping roller (3) and the conveyor belt (21) move in opposite directions at the attached position; A cleaning mechanism (4) is provided in the middle of the lower surface of the conveyor belt (21), the cleaning mechanism (4) comprising a water storage tank (44) provided below the conveyor belt (21), two guide rollers A (41) being symmetrically provided on both sides of the upper surface of the water storage tank (44) along the length direction, a guide roller C (43) and a cleaning roller B (42) being rotatably provided at the bottom of the water storage tank (44), the two guide rollers A (41) and the cleaning roller B (42) and the guide roller C (43) being parallel to each other, and the conveyor belt (21) sequentially passes around the guide roller A (41), the guide roller C (43) and the other guide roller A (41); Clean water is provided in the water storage tank (44) and submerges the lower surface of the conveyor belt (21) wound around the lower side of the guide roller C (43); the cleaning roller B (42) is provided in the clean water and is close to the surface of the conveyor belt (21) on the side where the scraping roller (3) is located; the cleaning roller B (42) is driven by a driving mechanism; the outer surface of the cleaning roller B (42) rotates faster than the moving speed of the conveyor belt (21) and moves in a direction opposite to the moving direction of the conveyor belt (21) at the contact position; The two sides of the conveyor belt (21) are movably fitted to the inner walls of the two sides of the water storage tank (44), and the upper surface of the clean water in the water storage tank (44) is separated by the conveyor belt (21); A water outlet trough (11) and a water inlet trough (12) are provided on the side surface of the box body (1); the water outlet trough (11) is connected to the water storage trough (44); the water inlet trough (12) is connected to the treatment chamber; the water inlet trough (12) is provided on a side of the inner wall of the treatment chamber away from the slag removal mechanism (2); the vertical height of the water inlet trough (12) is lower than the water outlet trough (11) and higher than the height of the suspended layer in the box body (1); a water conduit (9) is connected between the outer surface of the box body (1), the water outlet trough (11) and the water inlet trough (12); A partition (45) is provided in the water outlet trough (11), and a flooding port (46) is provided on the surface of the partition (45) above the cleaning roller B (42). A water inlet pipe (5) is provided on the surface of the box body (1) away from the water conduit (9), and the two ends of the water inlet pipe (5) are respectively connected to the bottom of the box body (1) and the inner side of the water storage trough (44), and a liquid pump (51) is connected to the surface of the water inlet pipe (5).

2. The air flotation machine based on high-concentration wastewater treatment according to claim 1, characterized in that: The driving mechanism comprises a motor (61) fixedly arranged on the outside of a housing (1), and a pulley A (62), a pulley B (63), a pulley C (64) and a pulley D (65) rotatably arranged on the outer surface of the housing (1), the pulley A (62) being fixedly connected to the rotating shaft of a conveying roller A (22), the pulley B (63) and the pulley C (64) being fixedly connected to the rotating shaft of a scraping roller (3), and the pulley D (65) being fixedly connected to the rotating shaft of a cleaning roller B (42), the output end of the motor (61) being transmission-connected to the pulley A (62) and the pulley B (63) through a belt, and the pulley C (64) being transmission-connected to the pulley D (65), and the diameter of the pulley A (62) being larger than the diameters of the pulleys B (63), C (64) and D (65).

3. The air flotation machine based on high-concentration wastewater treatment according to claim 1 is characterized in that: The two ends of the rotating shaft of the conveying roller B (23) are respectively connected to an adjusting mechanism (7); an arc groove (13) for movably mounting the adjusting mechanism (7) is provided inside the box (1); the arc of the arc groove (13) is the movable area of ​​the conveying roller B (23) tightening the conveyor belt (21); the adjusting mechanism (7) comprises a connecting member (71) embedded and slidably arranged inside the water inlet groove (12); the two ends of the connecting member (71) are respectively provided with mounting rings; the rotating shaft of the conveying roller B (23) is rotatably mounted on the conveying roller B (23); A push column (72) is rotatably mounted in the other of the mounting rings and is installed in the upper mounting ring. A hydraulic rod (73) is fixedly connected to a surface of one side of the push column (72). One end of the hydraulic rod (73) is fixedly connected to a support seat (74). The support seat (74) is rotatably mounted on the inner wall of the box body (1) and is located on the same inclined plane at both ends of the arc groove (13). A baffle (8) is fixedly installed on the inner side of the conveyor belt (21) and above the guide roller A (41) on the side close to the conveying roller B (23).

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