Air floatation sewage treatment device for sewage treatment

Abstract

The invention belongs to the technical field of sewage treatment, and discloses an air floatation sewage treatment device for sewage treatment, which comprises a shell, and also comprises: a support assembly mounted inside the shell; and the processing assembly is mounted at the bottom of the supporting assembly. According to the invention, sewage is stored in the two sewage treatment cavities for air floatation treatment, so that foam generated in the sewage treatment cavity between the first annular cover and the second annular cover is pushed into the sewage treatment cavity formed by the third annular cover and the second annular cover; foam in a sewage treatment cavity between a third annular cover and a second annular cover flows into a shell along a guide ring and can be discharged for unified collection and treatment, water is continuously injected into a storage tank along with a water injection pipe, the water sequentially overflows the two sewage treatment cavities to take away the foam on the surface, and the purpose of rapidly removing the foam is achieved. Meanwhile, the foam accumulation phenomenon can be avoided through water flow, and the foam removing efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, in particular to an air flotation sewage treatment device for sewage treatment. Background Art

[0002] The flotation sewage treatment device is a device that uses the adsorption of bubbles to achieve solid particles or oil-water separation, and is widely used in sewage treatment, industrial wastewater treatment, food processing and other fields; the working principle of the flotation sewage treatment device is mainly to inject gas (usually air or oxygen) into the sewage to form tiny bubbles, which will adhere to the suspended matter in the water when rising in the water, and bring them to the water surface together to form a foam layer; then, the foam layer is removed by a scraper or other equipment, so as to achieve the purpose of purifying the water quality. In this process, the size, number and distribution of the bubbles have an important influence on the flotation effect. The smaller the bubble, the larger the surface area, and the larger the contact area with the pollutant, so that the pollutant is more likely to float up; at present, the foam is scraped off by a rotating scraper in the flotation sewage treatment process, but due to the large volume of the scraper and the limited rotation speed, the scraper takes a long time to rotate around the sewage pool, so it is difficult to quickly and effectively clean the foam floating on the sewage. As the scraper continues to rotate, the accumulated foam gradually increases, and the foam volume increases and is squeezed and ruptured. Therefore, a flotation sewage treatment device for sewage treatment is proposed. Summary of the invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides a flotation sewage treatment device for sewage treatment. The existing scraper continuously rotates and the accumulated foam gradually increases, and the foam volume increases and is squeezed and broken.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an air flotation sewage treatment device for sewage treatment, comprising a housing, and further comprising:

[0005] A support assembly, the support assembly being installed inside the housing;

[0006] a processing assembly, the processing assembly being mounted on the bottom of the supporting assembly;

[0007] an aeration component, the aeration component being disposed inside the shell and inside the processing component;

[0008] A pushing component, wherein the pushing component is installed at the bottom of the shell;

[0009] The pushing assembly includes a driving motor installed at the bottom of the housing, a cam mounted at the output end of the driving motor, a second guide rod fixedly mounted at the bottom of the housing, and a transmission plate is provided on the outer movable sleeve of the second guide rod;

[0010] The processing assembly includes a storage tank fixedly mounted inside the housing, a push rod is provided in a movable sleeve inside the storage tank, and the bottom of the push rod is fixedly connected to the transmission plate;

[0011] The bottom of the shell is provided with a first annular cover, a second annular cover and a third annular cover in sequence from the inside to the outside, the outer movable sleeve of the storage tank is provided with a second support ring, and the top of the first annular cover is connected to the second support ring;

[0012] The tops of the third annular cover and the second annular cover are both fixed with a first support ring, and the first support ring and the second support ring are connected to the bottom of the support assembly;

[0013] A water injection pipe is fixedly installed in the middle of the support assembly, and the water injection pipe is located inside the storage tank;

[0014] Two sewage treatment chambers are formed between the first annular cover, the second annular cover and the third annular cover, and the heights of the tops of the first annular cover, the second annular cover and the third annular cover decrease from the inside to the outside.

[0015] Preferably, a guide ring is fixedly mounted on the upper end of the outer portion of the third annular cover;

[0016] Clean water flows through the water injection pipe over the top of the storage tank and enters the two sewage treatment chambers in turn. The water flow pushes the floating foam in the two sewage treatment chambers to be discharged into the shell along the guide ring.

[0017] Preferably, the top angle of the inner wall of the first support ring is in an arc shape, and the cross sections of the first annular cover, the second annular cover and the third annular cover are in a sawtooth shape, so that the cross sections of the two sewage treatment chambers are in a sawtooth shape;

[0018] The inclination angles of the top ends of the third annular cover, the second annular cover and the first annular cover are consistent.

[0019] Preferably, the support assembly includes a fixed plate fixed to the inner wall of the top end of the shell, two first guide rods are movably sleeved on the fixed plate, two threaded rods are threadedly sleeved on the fixed plate, and the two threaded rods are diagonally arranged with the two first guide rods.

[0020] Preferably, a docking plate is movably mounted on the bottom of the threaded rod, the water injection pipe is fixedly mounted on the docking plate, and the bottom of the docking plate is connected to the first support ring via a docking rod.

[0021] Preferably, the processing assembly further comprises a first stabilizing block fixedly mounted on the inner wall of the first annular cover, and a vertical slide groove for sliding of the first stabilizing block is provided on the outside of the storage tank.

[0022] Preferably, the aeration assembly includes an aeration tube fixed to the bottom of the shell through a second stabilizing block annular array, and two adjacent aeration tubes are connected by a butt joint so that the aeration tube and the butt joint form a closed ring, and the ring is located inside the two sewage treatment chambers.

[0023] Preferably, aeration holes are provided at the tops of the butt joint pipe and the aeration pipe, and air is injected into the ring through an air injection pipe.

[0024] Preferably, the pushing assembly includes a through slot opened at the bottom of the housing, and the through slot corresponds to the butt joint pipe;

[0025] A connecting frame is fixedly mounted on the bottom of the butt joint pipe, and the connecting frame passes through the interior of the through slot. A protective cover for sealing the through slot is arranged between the butt joint pipe and the shell.

[0026] Preferably, a support frame is fixedly mounted on the top of the transmission plate, a transmission rod is mounted on the support frame, and a rectangular through groove for the transmission rod to slide is formed at the lower end of the connecting frame.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention stores sewage in two sewage treatment chambers for flotation treatment, and injects clean water into the storage tank through a water injection pipe. The water overflows the top of the storage tank and enters the sewage treatment chamber between the second annular cover and the first annular cover along the surface of the second support ring. Since the sewage in the sewage treatment chamber is in a saturated state, as the clean water enters the sewage treatment chamber, the foam generated in the sewage treatment chamber between the first annular cover and the second annular cover is pushed into the sewage treatment chamber formed by the third annular cover and the second annular cover, and the foam in the sewage treatment chamber between the third annular cover and the second annular cover will flow into the interior of the shell along the guide ring, and can be discharged and uniformly collected and treated. As the water injection pipe continues to inject water into the storage tank, it overflows the two sewage treatment chambers in turn and takes away the foam on the surface, thereby achieving the purpose of quickly removing the foam. At the same time, the water flow can avoid the phenomenon of foam accumulation, thereby improving the efficiency of foam removal.

[0029] The present invention pushes the docking plate, the docking rod, the first annular cover, the second annular cover and the third annular cover downward by rotating the threaded rod, so that the first annular cover, the second annular cover and the third annular cover are gradually compressed, and the angle of the cross section of the two sewage treatment chambers is reduced, thereby increasing the time that the bubbles generated by the aeration component stay in the sewage treatment chamber, ensuring that the bubbles are fully in contact with the suspended matter, and improving the sewage treatment effect;

[0030] The present invention drives a cam to rotate by a driving motor, pushes a transmission plate, a support frame and a transmission rod upward, pushes a connecting frame and a butt joint pipe to rotate at a hinge with an aeration pipe, and injects gas into the aeration pipe through an injection pipe, and the gas is discharged into two sewage treatment chambers through aeration holes. During the rotation of the butt joint pipe, the direction of gas injection in the aeration holes is changed, so that bubbles are more evenly dispersed in the two sewage treatment chambers, thereby improving the sewage treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0033] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0034] Figure 4 This is a schematic diagram of the coordination structure of the processing component and the supporting component of the present invention;

[0035] Figure 5 This is a schematic diagram of the coordination structure of the push component, the treatment component and the aeration component of the present invention;

[0036] Figure 6 This is a schematic diagram of the appearance structure of the push component and the aeration component of the present invention;

[0037] Figure 7 It is a schematic diagram of the cross-sectional structure of the driving component and the processing component of the present invention;

[0038] Figure 8 For the present invention Figure 7 The enlarged structural diagram at B in the middle;

[0039] Fig. 9 This is a schematic diagram of the disassembled structure of the aeration assembly of the present invention;

[0040] Fig.10 It is a schematic diagram of the cross-sectional structure of the aeration assembly of the present invention.

[0041] In the figure: 1. shell; 2. support assembly; 21. fixing plate; 22. first guide rod; 23. docking plate; 24. threaded rod; 3. pushing assembly; 31. transmission plate; 32. support frame; 33. transmission rod; 34. connecting frame; 35. through groove; 36. second guide rod; 37. protective cover; 38. cam; 4. processing assembly; 41. storage tank; 411. first annular cover; 412. third annular cover; 413. second annular cover; 414. guide ring; 42. pushing rod; 43. vertical slide groove; 44. first stabilizing block; 45. docking rod; 46. first supporting ring; 47. second supporting ring; 48. water injection pipe; 5. aeration assembly; 51. second stabilizing block; 52. aeration pipe; 53. docking pipe; 54. aeration hole; 55. air injection pipe. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in 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 creative work are within the scope of protection of the present invention.

[0043] like Figures 1 to 10 As shown, the present invention provides an air flotation sewage treatment device for sewage treatment, comprising a housing 1, and further comprising:

[0044] A support assembly 2, the support assembly 2 is installed inside the housing 1;

[0045] A processing assembly 4, the processing assembly 4 is installed at the bottom of the supporting assembly 2;

[0046] An aeration component 5, which is disposed inside the housing 1 and inside the treatment component 4;

[0047] A pushing component 3, wherein the pushing component 3 is installed at the bottom of the housing 1;

[0048] The push assembly 3 includes a drive motor installed at the bottom of the housing 1, a cam 38 mounted at the output end of the drive motor, a second guide rod 36 is fixedly mounted at the bottom of the housing 1, and a transmission plate 31 is movably sleeved outside the second guide rod 36;

[0049] The processing assembly 4 includes a storage tank 41 fixedly mounted inside the housing 1, and a push rod 42 is provided in a movable sleeve inside the storage tank 41, and the bottom of the push rod 42 is fixedly connected to the transmission plate 31;

[0050] The bottom of the shell 1 is provided with a first annular cover 411, a second annular cover 413 and a third annular cover 412 in sequence from the inside to the outside. The outer movable sleeve of the storage tank 41 is provided with a second support ring 47. The top of the first annular cover 411 is connected to the second support ring 47.

[0051] The tops of the third annular cover 412 and the second annular cover 413 are both fixed with a first support ring 46 , and the first support ring 46 and the second support ring 47 are connected to the bottom of the support assembly 2 ;

[0052] A water injection pipe 48 is fixedly installed in the middle of the support assembly 2, and the water injection pipe 48 is located inside the storage tank 41;

[0053] Two sewage treatment chambers are formed between the first annular cover 411, the second annular cover 413 and the third annular cover 412, and the heights of the tops of the first annular cover 411, the second annular cover 413 and the third annular cover 412 decrease from the inside to the outside;

[0054] A guide ring 414 is fixedly mounted on the upper end of the third annular cover 412;

[0055] Clean water flows through the water injection pipe 48 over the top of the storage tank 41 and into the two sewage treatment chambers in turn. The water flow pushes the floating foam in the two sewage treatment chambers in turn along the guide ring 414 and is discharged into the shell 1.

[0056] Sewage is injected into the storage tank 41 through the support component 2, and the sewage flows over the top of the storage tank 41 into the treatment chamber between the first annular cover 411 and the second annular cover 413, and at the same time flows over the top of the second annular cover 413 into the treatment chamber between the third annular cover 412 and the second annular cover 413. As the sewage in the two treatment chambers is in a saturated state, air is injected into the two treatment chambers through the aeration component 5, and the suspended matter in the sewage is carried by the bubbles floating up, and the generated foam floats in the two sewage treatment chambers. At this time, the water injection equipment is connected to the water injection pipe 48, and clean water is injected into the storage tank 41 through the water injection pipe 48. The water flows over the top of the storage tank 41 and enters the second annular cover 413 and the first annular cover along the surface of the second support ring 47. In the sewage treatment chamber between 411, since the sewage in the sewage treatment chamber is in a saturated state, as clean water enters the sewage treatment chamber, the foam generated in the sewage treatment chamber between the first annular cover 411 and the second annular cover 413 will be pushed into the sewage treatment chamber formed by the third annular cover 412 and the second annular cover 413, and the foam in the sewage treatment chamber between the third annular cover 412 and the second annular cover 413 will flow into the interior of the shell 1 along the guide ring 414, and can be discharged for unified collection and treatment. As the water injection pipe 48 continues to inject water into the storage tank 41, it will overflow the two sewage treatment chambers in turn to take away the foam on the surface, thereby achieving the purpose of rapid foam removal. At the same time, the water flow can avoid the accumulation of foam, thereby improving the efficiency of foam removal.

[0057] like Figure 2-Figure 4 As shown, the top angle of the inner wall of the first support ring 46 is in an arc shape, and the cross-sections of the first annular cover 411, the second annular cover 413 and the third annular cover 412 are in a sawtooth shape, so that the cross-sections of the two sewage treatment chambers are in a sawtooth shape;

[0058] The inclination angles of the top ends of the third annular cover 412 , the second annular cover 413 and the first annular cover 411 are consistent.

[0059] The water injection equipment injects clean water into the storage tank 41 through the water injection pipe 48. The water overflows the storage tank 41 and flows along the outer edge of the second support ring 47 and the top of the first annular cover 411 into the sewage treatment chamber formed by the first annular cover 411 and the second annular cover 413, and carries the foam over the first support ring 46 into the sewage treatment chamber formed by the third annular cover 412 and the second annular cover 413. The inclined design of the top of the first annular cover 411, the second annular cover 413 and the third annular cover 412 can reduce the impact force of the water flow on the foam, thereby avoiding the foam from bursting.

[0060] like Figure 2-Figure 4 As shown, the support assembly 2 includes a fixed plate 21 fixed to the inner wall of the top end of the housing 1, two first guide rods 22 are movably sleeved on the fixed plate 21, two threaded rods 24 are threadedly sleeved on the fixed plate 21, and the two threaded rods 24 are diagonally arranged with the two first guide rods 22;

[0061] A docking plate 23 is movably mounted at the bottom of the threaded rod 24, a water injection pipe 48 is fixedly mounted on the docking plate 23, and the bottom of the docking plate 23 is connected to the first support ring 46 via a docking rod 45;

[0062] The processing assembly 4 further includes a first stabilizing block 44 fixed to the inner wall of the first annular cover 411 , and a vertical slide groove 43 for the first stabilizing block 44 to slide is provided on the outside of the storage tank 41 .

[0063] By rotating the threaded rod 24, the docking plate 23, the docking rod 45, the first annular cover 411, the second annular cover 413 and the third annular cover 412 are pushed downward, so that the first annular cover 411, the second annular cover 413 and the third annular cover 412 are gradually compressed, and the angle of the cross-section of the two sewage treatment chambers is reduced, thereby increasing the residence time of the bubbles generated by the aeration assembly 5 in the sewage treatment chamber, ensuring that the bubbles are in full contact with the suspended matter, and improving the sewage treatment effect.

[0064] like Figure 5-Figure 10 As shown, the aeration assembly 5 includes an aeration tube 52 fixed to the bottom of the shell 1 in an annular array through a second stabilizing block 51, and two adjacent aeration tubes 52 are connected by a butt joint 53, so that the aeration tube 52 and the butt joint 53 form a closed ring, and the ring is located inside the two sewage treatment chambers;

[0065] Aeration holes 54 are provided at the top of the butt joint 53 and the aeration pipe 52, and air is injected into the ring through the air injection pipe 55;

[0066] The pushing assembly 3 includes a through slot 35 formed at the bottom of the housing 1, and the through slot 35 corresponds to the butt joint 53;

[0067] A connecting frame 34 is fixedly mounted at the bottom of the butt-joint pipe 53, and the connecting frame 34 passes through the interior of the through slot 35. A protective cover 37 is provided between the butt-joint pipe 53 and the housing 1 to block the through slot 35.

[0068] A support frame 32 is fixedly mounted on the top of the transmission plate 31 , a transmission rod 33 is mounted on the support frame 32 , and a rectangular through groove for the transmission rod 33 to slide is formed at the lower end of the connecting frame 34 .

[0069] The cam 38 is driven to rotate by the driving motor, and the transmission plate 31, the support frame 32 and the transmission rod 33 are pushed upward, and the connecting frame 34 and the butt joint 53 are pushed to rotate at the hinge with the aeration pipe 52. At the same time, gas is injected into the aeration pipe 52 through the gas injection pipe 55, and the gas is discharged from the two sewage treatment chambers through the aeration holes 54. During the rotation of the butt joint 53, the direction of the gas injection in the aeration holes 54 is changed, and at the same time, the protruding part of the cam 38 is separated from the contact with the transmission plate 31. At this time, the transmission plate 31 moves downward to drive the connecting frame 34 and the butt joint 53 to rotate in the opposite direction, and the bubbles are dispersed more evenly in the two sewage treatment chambers in sequence, thereby improving the sewage treatment effect;

[0070] At the same time, the transmission plate 31 moves upward to push the push rod 42 to move upward to discharge the water stored in the storage tank 41 through the top and enter the two sewage treatment chambers in turn to achieve the purpose of foam discharge.

[0071] The working principle and use process of the present invention:

[0072] Sewage is injected into the storage tank 41 through the support assembly 2, and the sewage flows over the top of the storage tank 41 into the treatment chamber between the first annular cover 411 and the second annular cover 413, and at the same time flows over the top of the second annular cover 413 into the treatment chamber between the third annular cover 412 and the second annular cover 413. As the sewage in the two treatment chambers is in a saturated state, the cam 38 is driven by the driving motor to rotate, and the transmission plate 31, the support frame 32 and the transmission rod 33 are pushed upward, and the connecting frame 34 and the butt joint 53 are pushed to rotate at the hinge with the aeration pipe 52. At the same time, gas is injected into the aeration pipe 52 through the gas injection pipe 55, and the gas is discharged from the two sewage treatment chambers through the aeration holes 54. During the rotation of the butt joint 53, the direction of gas injection of the aeration holes 54 is changed, and at the same time, the protruding part of the cam 38 is separated from the contact with the transmission plate 31. At this time, the transmission plate 31 moves downward to drive the connecting frame 34 and the butt joint 53 to rotate in the opposite direction, and the bubbles are dispersed more evenly in the two sewage treatment chambers in sequence, thereby improving the sewage treatment effect;

[0073] At the same time, the water injection device is connected to the water injection pipe 48, and clean water is injected into the storage tank 41 through the water injection pipe 48. The transmission plate 31 moves up to push the push rod 42 to move up to discharge the water stored in the storage tank 41 through the top. The water overflows the top of the storage tank 41 and enters the sewage treatment chamber between the second annular cover 413 and the first annular cover 411 along the surface of the second support ring 47. Since the sewage in the sewage treatment chamber is in a saturated state, as the clean water enters the sewage treatment chamber, it will push the foam generated in the sewage treatment chamber between the first annular cover 411 and the second annular cover 413 into the sewage treatment chamber composed of the third annular cover 412 and the second annular cover 413, and the foam in the sewage treatment chamber between the third annular cover 412 and the second annular cover 413 will flow into the interior of the shell 1 along the guide ring 414, and can be discharged and collected uniformly. As the water injection pipe 48 continues to inject water into the storage tank 41, it overflows the two sewage treatment chambers in turn to take away the foam on the surface, thereby achieving the purpose of rapid foam removal. At the same time, the water flow can avoid the phenomenon of foam accumulation, thereby improving the efficiency of foam removal;

[0074] Water flows over the storage tank 41 along the outer edge of the second support ring 47 and the top of the first annular cover 411 into the sewage treatment chamber formed by the first annular cover 411 and the second annular cover 413, and carries foam over the first support ring 46 into the sewage treatment chamber formed by the third annular cover 412 and the second annular cover 413. The inclined design of the tops of the first annular cover 411, the second annular cover 413 and the third annular cover 412 can reduce the impact of water flow on the foam, thereby avoiding the phenomenon of foam bursting.

[0075] At the same time, by rotating the threaded rod 24, the docking plate 23, the docking rod 45, the first annular cover 411, the second annular cover 413 and the third annular cover 412 are pushed downward, so that the first annular cover 411, the second annular cover 413 and the third annular cover 412 are gradually compressed, and the angle of the cross-section of the two sewage treatment chambers is reduced, thereby increasing the residence time of the bubbles generated by the aeration assembly 5 in the sewage treatment chamber, ensuring that the bubbles are in full contact with the suspended matter, and improving the sewage treatment effect.

[0076] 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.

[0077] 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. A flotation sewage treatment device for sewage treatment, comprising a housing (1), characterized in that: Also includes: A support assembly (2), the support assembly (2) being installed inside the housing (1); A processing assembly (4), wherein the processing assembly (4) is mounted on the bottom of the supporting assembly (2); an aeration component (5), the aeration component (5) being arranged inside the shell (1) and located inside the processing component (4); A pushing component (3), wherein the pushing component (3) is installed at the bottom of the housing (1); The pushing assembly (3) comprises a driving motor installed at the bottom of the housing (1), a cam (38) mounted on the output end of the driving motor, a second guide rod (36) fixedly mounted at the bottom of the housing (1), and a transmission plate (31) movably sleeved outside the second guide rod (36); The processing assembly (4) comprises a storage tank (41) fixedly mounted inside the housing (1), a push rod (42) being movably sleeved inside the storage tank (41), and a bottom of the push rod (42) being fixedly connected to the transmission plate (31); The bottom of the shell (1) is provided with a first annular cover (411), a second annular cover (413) and a third annular cover (412) in sequence from the inside to the outside, the outer movable sleeve of the storage tank (41) is provided with a second support ring (47), and the top of the first annular cover (411) is connected to the second support ring (47); The tops of the third annular cover (412) and the second annular cover (413) are both fixedly mounted with a first support ring (46), and the first support ring (46) and the second support ring (47) are connected to the bottom of the support assembly (2); A water injection pipe (48) is fixedly mounted in the middle of the support assembly (2), and the water injection pipe (48) is located inside the storage tank (41); Two sewage treatment chambers are formed between the first annular cover (411), the second annular cover (413) and the third annular cover (412), and the heights of the tops of the first annular cover (411), the second annular cover (413) and the third annular cover (412) decrease from the inside to the outside.

2. The flotation sewage treatment device for sewage treatment according to claim 1 is characterized in that: A guide ring (414) is fixedly mounted on the upper end of the outer portion of the third annular cover (412); Clean water flows through the water injection pipe (48) over the top of the storage tank (41) and into the two sewage treatment chambers in turn, and the water flow pushes the floating foam in the two sewage treatment chambers in turn along the guide ring (414) and discharges it into the shell (1).

3. The flotation sewage treatment device for sewage treatment according to claim 2 is characterized in that: The top angle of the inner wall of the first support ring (46) is in an arc shape, and the cross-sections of the first annular cover (411), the second annular cover (413) and the third annular cover (412) are in a sawtooth shape, so that the cross-sections of the two sewage treatment chambers are in a sawtooth shape; The inclination angles of the top ends of the third annular cover (412), the second annular cover (413) and the first annular cover (411) are consistent.

4. The flotation sewage treatment device for sewage treatment according to claim 3 is characterized in that: The support assembly (2) comprises a fixing plate (21) fixedly mounted on the inner wall of the top end of the shell (1), two first guide rods (22) being movably sleeved on the fixing plate (21), two threaded rods (24) being threadedly sleeved on the fixing plate (21), and the two threaded rods (24) being arranged diagonally to the two first guide rods (22).

5. The flotation sewage treatment device for sewage treatment according to claim 4 is characterized in that: A docking plate (23) is movably mounted at the bottom of the threaded rod (24), the water injection pipe (48) is fixedly mounted on the docking plate (23), and the bottom of the docking plate (23) is connected to the first support ring (46) via a docking rod (45).

6. The flotation sewage treatment device for sewage treatment according to claim 5 is characterized in that: The processing assembly (4) further comprises a first stabilizing block (44) fixedly mounted on the inner wall of the first annular cover (411), and a vertical sliding groove (43) for the first stabilizing block (44) to slide is provided on the outside of the storage tank (41).

7. The flotation sewage treatment device for sewage treatment according to claim 1 is characterized by: The aeration assembly (5) comprises an aeration pipe (52) fixed to the inner bottom of the shell (1) in an annular array via a second stabilizing block (51), and two adjacent aeration pipes (52) are connected via a butt joint (53), so that the aeration pipe (52) and the butt joint (53) form a closed circular ring, and the circular ring is located inside two sewage treatment chambers.

8. The flotation sewage treatment device for sewage treatment according to claim 7 is characterized by: Aeration holes (54) are provided at the tops of the butt joint pipe (53) and the aeration pipe (52), and air is injected into the ring through an air injection pipe (55).

9. The flotation sewage treatment device for sewage treatment according to claim 8, characterized in that: The pushing assembly (3) comprises a through groove (35) formed at the bottom of the housing (1), and the through groove (35) corresponds to the butt joint (53); A connecting frame (34) is fixedly mounted on the bottom of the butt-joint pipe (53), and the connecting frame (34) passes through the interior of the through slot (35). A protective cover (37) for sealing the through slot (35) is provided between the butt-joint pipe (53) and the housing (1).

10. The flotation sewage treatment device for sewage treatment according to claim 9, characterized in that: A support frame (32) is fixedly mounted on the top of the transmission plate (31), a transmission rod (33) is mounted on the support frame (32), and a rectangular through groove for the transmission rod (33) to slide is formed at the lower end of the connecting frame (34).

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