Air floating type oily sewage treatment equipment and treatment method

Abstract

The invention discloses air floating type oily sewage treatment equipment and a treatment method. The equipment comprises a base, a treatment barrel, an aeration disc, a conversion assembly, a stirring assembly and an oil removal assembly, the aeration disc is arranged in the treatment cylinder; the conversion assembly comprises a rotating seat clamped on the base, a guide vertical pipe arranged on the rotating seat, a mounting platform clamped on the guide vertical pipe and a lifting motor for providing power for the mounting platform; the stirring assembly comprises a first motor arranged on the mounting platform, a rotary gland and a stirring net plate arranged on the lower bottom surface of the rotary gland; the oil removing assembly comprises a second motor arranged on the mounting platform, a collecting barrel and a shifting disc clamped in the collecting barrel; the equipment is reasonable in structural design, the oil-containing sewage is continuously stirred by the stirring assembly in the oil-containing sewage air flotation process, so that bubbles are more uniformly distributed in the oil-containing sewage, and the treatment efficiency and effect of the oil-containing sewage are improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to an air-floating type oily sewage treatment device and a treatment method. Background Art

[0002] Flotation oil removal is a commonly used industrial treatment technology for removing oil from water or other liquids. It is based on the principle of flotation and uses the buoyancy of bubbles to separate oil from liquid. The working principle of flotation oil removal is to introduce the liquid containing oil into a device, add air or other gases to generate bubbles, and make the bubbles combine with the oil particles to form a floating body. Due to the buoyancy of the bubbles, the floating body will float to the surface of the liquid to form a floating oil layer. Then, the floating oil layer is separated from the liquid through different separation methods, such as scraper separation or centrifugal separation.

[0003] Most companies now use flotation to remove oil from oily wastewater. However, in existing flotation oil removal devices, the bubbles are not evenly distributed in the wastewater, and the oily wastewater cannot be effectively flotated. A large amount of grease still remains in the treated wastewater, limiting the secondary utilization efficiency of the oily wastewater. At the same time, the existing flotation oil removal device has a long wastewater treatment cycle and low treatment efficiency. Summary of the invention

[0004] In view of the above-mentioned technical problems, the present invention provides an air-floatation type oily wastewater treatment device and a treatment method.

[0005] The technical solution of the present invention is: an air-floating oily wastewater treatment device, comprising a base, a treatment cylinder, an aeration plate, a conversion component, a stirring component and an oil removal component; the treatment cylinder is arranged on the base;

[0006] The aeration plate is arranged inside the treatment tube, and an aeration fan connected to the aeration plate is arranged on the base;

[0007] The conversion assembly includes a rotating seat rotatably connected to the base, a guide vertical pipe arranged on the rotating seat, a mounting platform connected to the guide vertical pipe, and a lifting motor arranged inside the rotating seat and providing power for the mounting platform;

[0008] The mixing and stirring assembly comprises a first motor arranged on the mounting platform, a rotating pressure cover arranged below the mounting platform, and a mixing mesh plate arranged on the lower bottom surface of the rotating pressure cover;

[0009] The oil removal assembly includes a second motor arranged on the mounting platform, a collecting cylinder arranged on the bottom surface of the mounting platform and a toggle plate rotatably clamped inside the collecting cylinder; an inner sleeve is arranged inside the collecting cylinder, a collecting groove is arranged on the side wall of the inner sleeve, and an oil-absorbing felt plate is arranged inside the collecting cylinder.

[0010] Furthermore, a gear ring is sleeved on the rotating seat; a rack meshing with the gear ring is slidably clamped on the upper end surface of the base; a first electric rod connected with the rack is arranged on the upper end surface of the base;

[0011] Note: When the rotating seat needs to be rotated, the first driving rod is used to push the rack to move on the upper end surface of the base. At this time, the rotating seat rotates under the meshing action of the gear ring and the rack, which is beneficial to improve the convenience of adjusting the rotating seat.

[0012] Furthermore, the stirring mesh plate is hollow inside and is movably connected to the bottom surface of the rotating gland; a plurality of closed doors opening to the inside of the stirring mesh plate are movably hinged on the side wall of the stirring mesh plate, and a reset torsion spring is provided at the hinge between each closed door and the stirring mesh plate;

[0013] Note: During the rotation of the stirring mesh plate, the closed door opens under the impact of the water flow. At this time, the suspended pollutants in the oily wastewater enter the stirring mesh plate for collection, which is beneficial to improve the thoroughness of the oily wastewater treatment.

[0014] Furthermore, each stirring mesh plate is slidably connected with an extrusion plate at the top; a first operating frame is provided below the stirring mesh plate, which penetrates each stirring mesh plate and is connected to each extrusion plate; an extrusion plate is provided inside the collecting cylinder and outside the inner sleeve; a second operating frame is provided below the collecting cylinder, which penetrates the collecting cylinder and is connected to the extrusion plate;

[0015] Description: By arranging a squeezing plate inside the stirring mesh plate and pulling the first operating frame, the pollutants collected inside the stirring mesh plate can be squeezed and dehydrated; by arranging a squeezing plate inside the collecting cylinder and pulling the second operating frame, the water adsorbed inside the oil-absorbing felt plate can be squeezed and dehydrated, which effectively reduces the water content of pollutants in the oily wastewater and reduces the loss of wastewater.

[0016] Furthermore, the lower bottom surfaces of the first operating frame and the second operating frame are both provided with threaded clamps; the upper end surface of the base is provided with a second electric rod; the second electric rod is provided with a threaded sleeve that can be connected to the threaded clamp;

[0017] Note: By setting up the second electric rod, it is beneficial to improve the convenience when the first operating frame and the second operating frame are pulled down, and the efficiency of oily wastewater treatment is improved.

[0018] The present invention also provides an air flotation oily wastewater treatment method, based on the above-mentioned air flotation oily wastewater treatment equipment, comprising the following steps:

[0019] S1. Pass the oily wastewater into the treatment cylinder;

[0020] S2. Use an aeration fan to inject external air into the oily wastewater through an aeration plate;

[0021] S3, rotating the rotating seat so that the stirring assembly is located directly above the treatment barrel; then using the lifting motor to drive the installation platform to move downward along the guide riser, and make the rotating gland clamped at the opening at the upper end of the treatment barrel, at this time, the stirring mesh plate extends into the treatment barrel; using a motor to drive the rotating gland and the stirring mesh plate to rotate simultaneously, so that the bubbles sprayed from the aeration disk are evenly dispersed in the oily wastewater under the action of the stirring mesh plate;

[0022] S4. The oil particles in the oily wastewater combine with the bubbles to form a floating body, and float to the surface of the oily wastewater under the action of buoyancy, and finally form a floating oil layer; the rotating seat is rotated again so that the oil removal component is located directly above the treatment cylinder; then the lifting motor is used to drive the installation platform to move downward along the guide riser, so that the collection cylinder extends into the treatment cylinder, and the toggle plate contacts the floating oil layer on the surface of the wastewater; finally, the second motor is used to drive the toggle plate to rotate, and the oil on the surface of the wastewater is scraped into the collection cylinder by the toggle plate, and the oil is adsorbed and fixed by the oil absorption felt plate;

[0023] S5. The treated oily wastewater is discharged from the treatment cylinder and the oil absorption felt plate is replaced.

[0024] Compared with the prior art, the beneficial effects of the present invention are embodied in the following aspects:

[0025] First, the treatment equipment of the present invention has a reasonable structural design. During the flotation process of oily wastewater, the stirring component is used to continuously stir the oily wastewater, so that the distribution of bubbles in the oily wastewater is more uniform, thereby improving the treatment efficiency and effect of the oily wastewater;

[0026] Second, the present invention can not only stir the oily wastewater, but also collect and clean the suspended pollutants in the oily wastewater by setting the internal hollow stirring mesh plate, so that the function of the equipment is further expanded, and at the same time, the treatment cycle of the oily wastewater is shortened, and the energy consumption of the equipment is reduced;

[0027] Third, the present invention scrapes the floating oil on the sewage surface into the collection tube through the rotating toggle disk, and uses the oil absorption felt plate to absorb and fix the floating oil, thereby preventing the floating oil from entering the sewage again during the rotation of the toggle disk, thereby improving the treatment effect of the oily sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a longitudinal sectional view of the processing apparatus of the present invention;

[0029] Figure 2 is a front view of the processing device of the present invention;

[0030] Figure 3 It is a distribution diagram of the processing cylinder, the rotating seat and the collecting box on the base of the present invention;

[0031] Figure 4 is a distribution diagram of the stirring mesh plate of the present invention inside the treatment cylinder;

[0032] Figure 5 It is a schematic diagram of the connection between the closed door and the stirring mesh plate of the present invention;

[0033] Figure 6 The present invention Figure 1 A local enlarged schematic diagram of the middle A;

[0034] Figure 7 It is a schematic diagram of the connection between the dial plate and the collecting cylinder of the present invention;

[0035] Figure 8 It is a schematic diagram of the connection between the extrusion disk, the collecting cylinder and the inner sleeve of the present invention;

[0036] Among them, 1-base, 2-treatment cylinder, 20-water inlet pipe, 21-drain pipe, 3-aeration plate, 30-aeration nozzle, 31-aeration fan, 4-conversion component, 40-rotating seat, 400-gear ring, 401-rack, 41-guide riser, 42-installation platform, 420-sliding sleeve, 421-auxiliary rotating frame, 43-lifting motor, 430-lifting screw, 44-first electric rod, 5-stirring component, 50-first motor, 51-rotating cover, 52-stirring mesh plate, 520-enclosed door, 53-scraping plate, 530-sliding rod, 531-damping spring, 54-squeezing plate, 540-first operating frame, 55-cutting strip, 6-oil removal assembly, 60-second motor, 61-collecting cylinder, 610-filter mesh ring, 62-sliding plate, 63-inner sleeve, 630-collecting trough, 631-limiting frame, 64-oil absorbing felt plate, 65-squeezing plate, 650-second operating frame, 7-second electric rod, 8-collecting box. DETAILED DESCRIPTION

[0037] Example 1

[0038] like Figure 1 The flotation type oily wastewater treatment equipment shown in the figure comprises a base 1, a treatment tube 2 arranged on the upper end surface of the base 1, an aeration plate 3 arranged inside the treatment tube 2, a conversion assembly 4 arranged on the base 1, and a stirring assembly 5 and an oil removal assembly 6 arranged on the conversion assembly 4 and capable of being movably connected with the treatment tube 2 respectively;

[0039] like Figure 2 As shown, a water inlet pipe 20 and a drain pipe 21 are sequentially arranged on the outer wall of the treatment tube 2 from top to bottom;

[0040] like Figure 1 , 3 As shown, a plurality of aeration nozzles 30 are evenly distributed on the aeration plate 3, and an aeration fan 31 connected to the aeration plate 3 through a conduit is provided on the upper end surface of the base 1;

[0041] like Figure 1 As shown, the conversion assembly 4 includes a rotating seat 40 which is rotatably clamped on the base 1 and is hollow inside, a guide standpipe 41 vertically arranged on the rotating seat 40, a mounting platform 42 which is slidably clamped on the guide standpipe 41, and a lifting motor 43 which is arranged inside the rotating seat 40 and provides lifting power for the mounting platform 42; a connector is slidably clamped inside the guide standpipe 41, and the mounting platform 42 is slidably clamped on the guide standpipe 41 through a sliding sleeve 420, and the sliding sleeve 420 is fixedly connected to the connector; the output end of the lifting motor 43 is connected to a lifting screw 430 which penetrates the rotating seat 40 and extends into the guide standpipe 41; the lifting screw 430 is threadedly connected to the connector;

[0042] like Figure 1 , 4 As shown, the mixing assembly 5 includes a first motor 50 disposed on one side of the upper end surface of the mounting platform 42, a rotating pressure cover 51 disposed below the mounting platform 42 and connected to the output end of the first motor 50, and four mixing mesh plates 52 equidistantly distributed on the lower bottom surface of the rotating pressure cover 51;

[0043] like Figure 1 , 7 As shown in Figures 8 and 9, the oil removal assembly 6 includes a second motor 60 arranged on the other side of the upper end surface of the mounting platform 42, a collecting barrel 61 fixedly arranged on the lower bottom surface of the mounting platform 42 and corresponding to the position of the second motor 60, and a toggle plate 62 rotatably engaged inside the collecting barrel 61 and connected to the output end of the second motor 60; an inner sleeve 63 is sleeved inside the collecting barrel 61, and the bottom end of the inner sleeve 63 passes through the collecting barrel 61; a collecting groove 630 is penetrated on the side wall of the inner sleeve 63, and a limiting frame 631 is arranged inside the inner sleeve 63; a filter mesh ring 610 is arranged at the bottom of the collecting barrel 61, and an oil-absorbing felt plate 64 is arranged inside the collecting barrel 61 and above the filter mesh ring 610; the toggle plate 62 is rotatably engaged with the limiting frame 631, and the height of the toggle plate 62 corresponds to the height of the collecting groove 630.

[0044] Example 2

[0045] This embodiment describes an air flotation oily wastewater treatment method, based on an air flotation oily wastewater treatment device of embodiment 1, comprising the following steps:

[0046] S1, passing the oily wastewater into the treatment tube 2 through the water inlet pipe 20;

[0047] S2, using the aeration fan 31 to pass external air into the aeration plate 3 through the conduit, the external air forms bubbles under the action of the aeration nozzle 31 and is injected into the oily wastewater;

[0048] S3, rotating the rotating seat 40, so that the stirring assembly 5 is located directly above the treatment tube 2; then the lifting motor 43 is used to drive the lifting screw 430 to rotate, at this time, the sliding sleeve 420 drives the installation platform 42 to move downward along the guide riser 41 under the action of the connector, and the rotating gland 51 is clamped at the upper opening of the treatment tube 2, and the stirring mesh plate 52 is extended into the treatment tube 2; a motor 50 is used to drive the rotating gland 51 and the stirring mesh plate 52 to rotate simultaneously, so that the bubbles sprayed by the aeration nozzle 31 are evenly dispersed in the oily wastewater under the action of the stirring mesh plate 52;

[0049] S4. The oil particles in the oily wastewater combine with the bubbles to form a floating body, and float to the surface of the oily wastewater under the action of buoyancy, and finally form a floating oil layer; the rotating seat 40 is rotated again, so that the oil removal component 6 is located directly above the treatment tube 2; then the lifting motor 43 is used to drive the installation platform 42 to move downward along the guide riser 41, so that the collection tube 61 extends into the treatment tube 2, and the toggle plate 62 contacts the floating oil layer on the sewage surface; finally, the second motor 60 is used to drive the toggle plate 62 to rotate, and the oil on the surface of the sewage is scraped into the collection tube 61 through the collection groove 630 on the inner sleeve 63 by the toggle plate 62, and the oil absorption felt plate 64 is used to adsorb and fix the oil, and the sewage entering the collection tube 61 enters the treatment tube 2 again through the filter mesh ring 610;

[0050] S5. The treated oily wastewater is discharged from the treatment tube 2 through the drain pipe 21, and the oil absorption felt plate 64 is replaced.

[0051] Example 3

[0052] The difference between this embodiment and embodiment 1 is that:

[0053] like Figure 3 As shown, a gear ring 400 is sleeved on the rotating seat 40; a rack 401 meshingly connected to the gear ring 400 is slidably clamped on the upper end surface of the base 1; a first electric rod 44 connected to the rack 401 is provided on the upper end surface of the base 1; when the rotating seat 40 needs to be rotated, the first driving rod 44 is used to push the rack 401 to move on the upper end surface of the base 1. At this time, the rotating seat 40 rotates under the meshing action of the gear ring 400 and the rack 401, which is beneficial to improve the convenience of adjusting the rotating seat 40.

[0054] Example 4

[0055] This embodiment describes an air flotation oily wastewater treatment method, which is an air flotation oily wastewater treatment device based on Embodiment 3, and differs from Embodiment 2 in that:

[0056] In steps S3 and S4 , when the rotating seat 40 is rotated, the first driving rod 44 is used to push the rack 401 to move on the upper end surface of the base 1 . At this time, the rotating seat 40 rotates under the meshing action of the gear ring 400 and the rack 401 .

[0057] Example 5

[0058] The difference between this embodiment and embodiment 3 is that:

[0059] like Figure 5 As shown, the stirring mesh plate 52 is hollow inside and is movably connected to the bottom surface of the rotating pressure cover 51; three closed doors 520 that open to the inside of the stirring mesh plate 52 are movably hinged on the side wall of the stirring mesh plate 52, and a reset torsion spring is provided at the hinge between each closed door 520 and the stirring mesh plate 52; a cutting strip 55 is provided on the outer wall of the stirring mesh plate 52; the setting of the internally hollow stirring mesh plate 52 facilitates the collection of suspended pollutants in the oily wastewater.

[0060] Example 6

[0061] This embodiment describes an air flotation oily wastewater treatment method, which is based on an air flotation oily wastewater treatment device of embodiment 5, and differs from embodiment 4 in that:

[0062] In step S3, during the rotation of the stirring mesh plate 52, the cutting bar 55 can be used to cut and crush the large particle pollutants in the oily wastewater; at the same time, the closed door 520 is opened under the impact of the water flow, and the suspended pollutants in the oily wastewater enter the stirring mesh plate 52 for collection.

[0063] Example 7

[0064] The difference between this embodiment and embodiment 5 is that:

[0065] like Figure 4 , 6 As shown, the lower surface of the rotating pressure cover 51 is slidably clamped with four scraper plates 53 that respectively abut against the inner wall of the treatment cylinder 2 through a sliding rod 530; the side of each sliding rod 530 that is close to each other is sleeved with a damping spring 531 that abuts against the scraper plate 53 at the corresponding position; the scraper plate 53 can be used to clean the pollutants adhering to the inner wall of the treatment cylinder 2.

[0066] Example 8

[0067] This embodiment describes an air flotation oily wastewater treatment method, which is an air flotation oily wastewater treatment device based on Embodiment 7, and differs from Embodiment 6 in that:

[0068] In step S3 , the rotary cover 51 rotates and drives the scraper plate 53 to rotate, so as to clean the pollutants adhered to the inner wall of the treatment tube 2 ; meanwhile, the scraper plate 53 is always close to the inner wall of the treatment tube 2 under the action of the damping spring 531 .

[0069] Example 9

[0070] The difference between this embodiment and embodiment 7 is that:

[0071] like Figure 1 , 4 As shown in , 8, each stirring mesh plate 52 has an extrusion plate 54 slidably clamped on the top; a first operating frame 540 is provided below the stirring mesh plate 52, which passes through each stirring mesh plate 52 and is connected to each extrusion plate 54; an extrusion disk 65 is provided inside the collecting cylinder 61 and outside the inner sleeve 63; a second operating frame 650 is provided below the collecting cylinder 61, which passes through the collecting cylinder 61 and is connected to the extrusion disk 65; threaded clamps are provided on the lower bottom surfaces of the first operating frame 540 and the second operating frame 650; a second electric rod 7 is provided on the upper end surface of the base 1; a threaded sleeve that can be connected to the threaded clamp is provided on the second electric rod 7.

[0072] Example 10

[0073] This embodiment describes an air flotation oily wastewater treatment method, which is an air flotation oily wastewater treatment device based on Embodiment 9, and differs from Embodiment 8 in that:

[0074] After step S3 is completed, the threaded clamp on the first operating frame 540 is movably connected to the threaded sleeve on the second electric rod 7, and the first operating frame 540 is pulled downward by the second electric rod 7, and the pollutants collected inside the stirring mesh plate 52 are squeezed and dehydrated by the squeezing plate 54;

[0075] After step S4 is completed, the threaded clamp on the second operating frame 650 is movably connected to the threaded sleeve on the second electric rod 7, and the second operating frame 650 is pulled downward by the second electric rod 7, and the water adsorbed inside the oil-absorbing felt plate 64 is squeezed and dehydrated by the squeezing plate 65.

[0076] Embodiment 11

[0077] The difference between this embodiment and embodiment 9 is that:

[0078] like Figure 1 As shown, a collection box 8 which is sleeved on the outside of the second electric rod 7 is provided on the upper end surface of the base 1 .

[0079] Example 12

[0080] This embodiment describes an air flotation oily wastewater treatment method, which is an air flotation oily wastewater treatment device based on embodiment 11, and differs from embodiment 10 in that:

[0081] In step S3 and step S4, the sewage squeezed out from the stirring mesh plate 52 and the oil absorption felt plate 64 enters the collecting box 8 for collection.

[0082] Example 13

[0083] like Figure 2 As shown, an auxiliary rotating frame 421 is provided on the lower bottom surface of the mounting platform 42 and is rotatably engaged with the rotating pressure cover 51. By providing the auxiliary rotating frame 421, it is avoided that when the rotating pressure cover 51 is connected to the output end of the first motor 50, the output end of the first motor 50 is worn due to the gravity of the rotating pressure cover 51.

[0084] It should be noted that the aeration nozzle 30, aeration fan 31, lifting motor 43, first electric rod 44, first motor 50, second motor 60 and second electric rod 7 used in the present invention all adopt existing technologies, and are not specifically limited here. The corresponding products can be selected according to actual needs.

Claims

1. An air flotation oily wastewater treatment equipment, characterized in that: It comprises a base (1), a treatment cylinder (2), an aeration plate (3), a conversion component (4), a stirring component (5) and an oil removal component (6); the treatment cylinder (2) is arranged on the base (1); The aeration plate (3) is arranged inside the treatment tube (2), and an aeration fan (31) connected to the aeration plate (3) is arranged on the base (1); The conversion assembly (4) comprises a rotating seat (40) rotatably clamped on the base (1), a guide vertical pipe (41) arranged on the rotating seat (40), a mounting platform (42) clamped on the guide vertical pipe (41), and a lifting motor (43) arranged inside the rotating seat (40) and providing power for the mounting platform (42); The mixing and stirring assembly (5) comprises a first motor (50) arranged on the mounting platform (42), a rotating pressure cover (51) arranged below the mounting platform (42), and a mixing mesh plate (52) arranged on the bottom surface of the rotating pressure cover (51); The oil removal assembly (6) comprises a second motor (60) arranged on the mounting platform (42), a collecting cylinder (61) arranged on the bottom surface of the mounting platform (42), and a dial (62) rotatably engaged inside the collecting cylinder (61); an inner sleeve (63) is arranged inside the collecting cylinder (61), a collecting groove (630) is arranged on the side wall of the inner sleeve (63), and an oil absorption felt plate (64) is arranged inside the collecting cylinder (61).

2. The air flotation oily wastewater treatment equipment according to claim 1 is characterized in that: The rotating seat (40) is sleeved with a gear ring (400); the upper end surface of the base (1) is slidably engaged with a rack (401) meshingly connected to the gear ring (400); and the upper end surface of the base (1) is provided with a first electric rod (44) connected to the rack (401).

3. The air flotation oily wastewater treatment equipment according to claim 1 is characterized in that: The stirring mesh plate (52) is hollow inside and is movably connected to the bottom surface of the rotating pressure cover (51); a plurality of closed doors (520) that open toward the inside of the stirring mesh plate (52) are movably hinged on the side wall of the stirring mesh plate (52), and a return torsion spring is provided at the hinge between each of the closed doors (520) and the stirring mesh plate (52).

4. The air flotation oily wastewater treatment equipment according to claim 1 is characterized in that: Each stirring mesh plate (52) is slidably engaged with an extrusion plate (54) at the top thereof; a first operating frame (540) is provided below the stirring mesh plate (52) and penetrates each stirring mesh plate (52) and is connected to each extrusion plate (54); an extrusion disk (65) is provided inside the collecting tube (61) and is located outside the inner sleeve (63); and a second operating frame (650) is provided below the collecting tube (61) and penetrates the collecting tube (61) and is connected to the extrusion disk (65).

5. The air flotation oily wastewater treatment equipment according to claim 4 is characterized in that: The lower bottom surfaces of the first operating frame (540) and the second operating frame (650) are both provided with threaded clamps; the upper end surface of the base (1) is provided with a second electric rod (7); and the second electric rod (7) is provided with a threaded sleeve that can be connected to the threaded clamp.

6. A flotation oily wastewater treatment method, based on the flotation oily wastewater treatment equipment according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, passing the oily wastewater into the treatment cylinder (2); S2, using an aeration fan (31) to inject external air into the oily wastewater through the aeration plate (3); S3, rotating the rotating seat (40) so that the stirring assembly (5) is located directly above the treatment barrel (2); then using the lifting motor (43) to drive the installation platform (42) to move downward along the guide riser (41), and making the rotating gland (51) snap into the upper opening of the treatment barrel (2), at which time the stirring mesh plate (52) extends into the treatment barrel (2); using a motor (50) to drive the rotating gland (51) and the stirring mesh plate (52) to rotate simultaneously, so that the bubbles ejected from the aeration disk (3) are evenly dispersed in the oily wastewater under the action of the stirring mesh plate (52); S4, the oil particles in the oily wastewater combine with the bubbles to form a floating body, and float to the surface of the oily wastewater under the action of buoyancy, and finally form a floating oil layer; the rotating seat (40) is rotated again, so that the oil removal component (6) is located directly above the treatment cylinder (2); then the lifting motor (43) is used to drive the installation platform (42) to move downward along the guide riser (41), so that the collection cylinder (61) extends into the interior of the treatment cylinder (2), and the toggle plate (62) contacts the floating oil layer on the surface of the wastewater; finally, the second motor (60) is used to drive the toggle plate (62) to rotate, and the oil on the surface of the wastewater is scraped into the interior of the collection cylinder (61) by the toggle plate (62), and the oil absorption felt plate (64) is used to absorb and fix the oil; S5. The treated oily wastewater is discharged from the treatment barrel (2), and the oil absorption felt plate (64) is replaced.

7. The air flotation oily wastewater treatment equipment according to claim 6 is characterized in that: A plurality of closed doors (520) are movably hinged on the side wall of the stirring mesh plate (52).

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