Dissolved air flotation machine for treating sewage

Abstract

The utility model relates to the technical field of dissolved air flotation machines, in particular to a dissolved air flotation machine for sewage treatment, which is provided with a collecting device, uses a hopper-shaped filter screen to filter and collect scum, reduces the influence of mechanical vibration on the filter screen, improves the sewage cleaning effect, and is provided with a flushing device to flush the filter screen, so that the sewage treatment efficiency is improved. The cleaning effect on the filter screen is improved, and the cleaning effect on sewage is improved; comprising a body; the dissolved air flotation device, the collecting device, the flushing device, the filtering device and the slag pushing device are all mounted on the machine body; the machine body is used for containing sewage, the dissolved air flotation device is used for carrying out dissolved air flotation on the sewage, the collecting device is used for collecting scum, the flushing device is used for flushing the collecting device, the filtering device is used for filtering the scum, and the scum pushing device is used for reducing the possibility that the scum is brought into treated water.

Description

Technical Field

[0001] This utility model relates to the technical field of dissolved air flotation machines, and in particular to a dissolved air flotation machine for treating wastewater. Background Technology

[0002] Dissolved air flotation (DAF) is an important piece of equipment in the field of wastewater treatment. It utilizes the characteristic that water has different solubility under different pressures to effectively remove suspended solids from wastewater through steps such as dissolved air flotation and solid-liquid separation.

[0003] Existing dissolved air flotation (DAF) machines, such as the Chinese utility model patent CN222250130U (a DAF sludge removal device), represent a class of prior art. Their main structure includes a dissolved air releaser, a strip filter, and a rubber hammer. The dissolved air releaser provides dissolved air water to perform flotation treatment on the scum in the wastewater. The strip filter filters and collects the scum on the top of the wastewater. The rubber hammer strikes the strip filter, causing it to vibrate and detach the scum from the strip filter.

[0004] However, existing technology and equipment still have the following problems when in use: belt filters are greatly affected by vibration when filtering scum, resulting in poor cleaning effect on sewage. Furthermore, cleaning the filter screen by vibration is ineffective, leading to poor sewage cleaning effect. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a dissolved air flotation machine for treating sewage. It uses a collection device to filter and collect scum using a bucket-shaped filter screen, reducing the impact of mechanical vibration on the filter screen and improving the cleaning effect on sewage. Furthermore, it uses a rinsing device to rinse the filter screen, thereby improving the cleaning effect on the filter screen and the overall sewage treatment.

[0006] This utility model discloses a dissolved air flotation (DAF) machine for treating wastewater, comprising a machine body; and further comprising a DAF device, a collection device, a flushing device, a filtration device, and a scum pushing device, all of which are mounted on the machine body; the machine body holds the wastewater, the DAF device performs dissolved air flotation on the wastewater, the collection device collects the scum, the flushing device flushes the collection device, the filtration device filters the scum, and the scum pushing device reduces the possibility of scum being carried into the treated water.

[0007] Preferably, the machine body includes multiple support bases, a flotation tank, two supports (one, two, three, and four), the flotation tank is installed on the top of the multiple support bases, the front end of the flotation tank is provided with a drain outlet and a water inlet, the right end of the flotation tank is provided with a feed inlet and a discharge outlet, and the feed inlet is located in front of the discharge outlet. The two supports (one and three) are both installed on the top of the flotation tank, the two supports (two) are installed on the side of the flotation tank, and the four supports (four) are installed on the side of the front support (three). The flotation tank is used to hold sewage.

[0008] Preferably, the dissolved air flotation device includes a gear pump, a reducer, a motor, a pipeline, a dissolved air tank, a pipeline, an air compressor, and a pipeline. The gear pump is connected and installed at the front end of the drain outlet of the flotation tank. The reducer is fixedly installed at the top of the gear pump. The motor is fixedly installed at the top of the reducer and provides power to the gear pump through the reducer. The dissolved air tank is fixedly installed at the front end of the inlet of the flotation tank. Pipeline 1 is installed on the gear pump and the dissolved air tank. The air compressor is fixedly installed at the front end of the flotation tank. Pipeline 2 is installed in the dissolved air tank. Pipeline 3 is connected to the rear end of the dissolved air tank and fixedly installed in the inlet of the flotation tank. Pipeline 3 slopes downward from front to back. Motor 1 provides power to drive gear pump 1 to pump the sewage inside the flotation tank into the dissolved air tank. At the same time, the air compressor provides power to pump air into the dissolved air tank. Inside the dissolved air tank, the air is dissolved into the sewage under pressure. Then, the dissolved air water is discharged into the flotation tank through pipe 3. The dissolved air water releases gas due to decompression, and the flotation effect causes the scum in the sewage to move to the surface of the sewage.

[0009] Preferably, the collection device includes a second reducer, a second motor, a sprocket shaft, two sets of sprockets, two chains, and multiple filter buckets. The second reducer is fixedly installed on one side of a bracket. The sprocket shaft is rotatably installed on two first brackets, and the sprocket shaft passes through a first bracket and is rotatably connected to the second reducer. The second motor provides power to the sprocket shaft through the second reducer. The two sets of sprockets are rotatably installed on the two first brackets respectively, and both sets of sprockets are located between the two first brackets. Two chains are installed on the sprocket shaft and the two sets of sprockets. Multiple filter buckets are evenly spaced on the two chains. The second motor provides power, which is transmitted through the second reducer, the sprocket shaft, the sprockets, and the chains to drive the filter buckets to move. The movement of the filter buckets collects the scum on the surface of the sewage.

[0010] Preferably, the rinsing device includes a guide plate, a gear pump II, a reducer III, a motor III, a pipe IV, and multiple nozzles. The guide plate is fixedly mounted on two supports I. The gear pump II is fixedly mounted on the top of the supports II. The side end of the gear pump II is connected to the interior of the flotation tank via a hose. The reducer III is fixedly mounted on the top of the gear pump II. The motor III is fixedly mounted on the top of the reducer III, and the motor III provides power to the gear pump II through the reducer III. The pipe IV is installed on the side end of the gear pump II and is fixedly mounted on the supports IV. Multiple nozzles are provided at the top of the pipe IV, and multiple nozzles are respectively installed at the bottom of the multiple nozzles. The motor III provides power to drive the gear pump II to pump the sewage in the flotation tank into the pipe IV. The sewage in the pipe IV is sprayed out through the nozzles to rinse the filter bucket, reducing the scum adhering to the surface of the filter bucket. The guide plate guides the scum that falls from the filter bucket.

[0011] Preferably, the filtration device includes two rubber pads, a bracket five, a filter plate, and a vibration motor. The two rubber pads are respectively installed on two brackets three, and both rubber pads are located between the two brackets three. The bracket five is installed on the two rubber pads. The filter plate is installed obliquely inside the bracket five. The vibration motor is fixedly installed on the side of the bracket five. The filter plate filters the collected scum, reducing the water content in the scum. The vibration motor provides vibration, increasing the speed of water and scum separation, and simultaneously causing the scum to be discharged from the machine along the oblique filter plate.

[0012] Preferably, the scum pushing device includes a speed reducer, a motor, and a fan blade. The speed reducer is fixedly installed at the rear end of the flotation tank, the motor is fixedly installed at the rear end of the speed reducer, and the fan blade is rotatably installed inside the flotation tank. The fan blade passes through the flotation tank and is rotatably connected to the speed reducer. The motor provides power to the fan blade through the speed reducer. The motor provides power to drive the fan blade to rotate. The rotation of the fan blade pushes the scum on the surface of the sewage forward, reducing the possibility that the scum entering the discharge port of the flotation tank will be carried into the treated water.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: by using a funnel-shaped filter screen to filter and collect scum, the influence of mechanical vibration on the filter screen can be reduced, resulting in a better cleaning effect on sewage; and by cleaning the filter screen through rinsing, the cleaning effect on the filter screen and the cleaning effect on sewage are both better. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0015] Figure 2 This is an isometric structural diagram of the fuselage;

[0016] Figure 3 This is an isometric structural diagram of the fuselage;

[0017] Figure 4This is an isometric structural diagram of a dissolved air flotation device;

[0018] Figure 5 This is a top view of the dissolved air flotation device.

[0019] Figure 6 This is a schematic diagram of the isometric cross-sectional structure of the collection device;

[0020] Figure 7 This is an isometric structural diagram of the flushing device;

[0021] Figure 8 This is an isometric structural diagram of the filtration device;

[0022] Figure 9 This is a schematic diagram of the isometric structure of the slag pushing device.

[0023] The attached diagram is labeled as follows: 01. Body; 11. Support base; 12. Flotation tank; 13. Frame 1; 14. Frame 2; 15. Frame 3; 16. Frame 4; 02. Dissolved air flotation device; 21. Gear pump 1; 22. Reducer 1; 23. Motor 1; 24. Pipeline 1; 25. Dissolved air tank; 26. Pipeline 2; 27. Air compressor; 28. Pipeline 3; 03. Collection device; 31. Reducer 2; 32. Electric... Machine 2; 33. Sprocket shaft; 34. Sprocket; 35. Chain; 36. Filter hopper; 04. Washing device; 41. Guide plate; 42. Gear pump 2; 43. Reducer 3; 44. Motor 3; 45. Pipeline 4; 46. Nozzle; 05. Filter device; 51. Rubber pad; 52. Support 5; 53. Filter plate; 54. Vibrating motor; 06. Slag pushing device; 61. Reducer 4; 62. Motor 4; 63. Fan blade. Detailed Implementation

[0024] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example 1

[0025] like Figure 1 As shown, the system includes a body 01; it also includes a dissolved air flotation device 02, a collection device 03, a rinsing device 04, a filtering device 05, and a scum pushing device 06. The dissolved air flotation device 02, the collection device 03, the rinsing device 04, the filtering device 05, and the scum pushing device 06 are all installed on the body 01. The body 01 holds the wastewater, the dissolved air flotation device 02 performs dissolved air flotation on the wastewater, the collection device 03 collects the scum, the rinsing device 04 rinses the collection device 03, the filtering device 05 filters the scum, and the scum pushing device 06 reduces the possibility of scum being carried into the treated water.

[0026] like Figure 2 and Figure 3 As shown, the body 01 includes multiple support bases 11, an air flotation tank 12, two brackets 13, 14, 15, and 16. The air flotation tank 12 is installed on the top of the multiple support bases 11. The front end of the air flotation tank 12 is provided with a drain outlet and a water inlet. The right end of the air flotation tank 12 is provided with a feed inlet and a discharge outlet, and the feed inlet is located in front of the discharge outlet. The two brackets 13 and the two brackets 35 are installed on the top of the air flotation tank 12. The bracket 2 14 is installed on the side of the air flotation tank 12. The bracket 4 16 is installed on the side of the front bracket 3 15.

[0027] like Figure 4 and Figure 5 As shown, the dissolved air flotation device 02 includes a gear pump 21, a reducer 22, a motor 23, a pipe 24, a dissolved air tank 25, a second pipe 26, an air compressor 27, and a third pipe 28. The gear pump 21 is connected and installed at the front end of the drain outlet of the flotation tank 12. The reducer 22 is fixedly installed at the top of the gear pump 21. The motor 23 is fixedly installed at the top of the reducer 22, and the motor 23 provides power to the gear pump 21 through the reducer 22. The dissolved air tank 25 is fixedly installed at the front end of the inlet of the flotation tank 12. The pipe 24 is installed on the gear pump 21 and the dissolved air tank 25. The air compressor 27 is fixedly installed at the front end of the flotation tank 12. The second pipe 26 is installed on the dissolved air tank 25 and the air compressor 27. The third pipe 28 is connected and installed at the rear end of the dissolved air tank 25, and the third pipe 28 is fixedly installed in the inlet of the flotation tank 12. The third pipe 28 slopes downward from front to back.

[0028] like Figure 6 As shown, the collection device 03 includes a second reducer 31, a second motor 32, a sprocket shaft 33, two sets of sprockets 34, two chains 35, and multiple filter hoppers 36. The second reducer 31 is fixedly installed on the side of a first bracket 13. The sprocket shaft 33 is rotatably installed on two first brackets 13, and the sprocket shaft 33 passes through a first bracket 13 and is rotatably connected to the second reducer 31. The second motor 32 provides power to the sprocket shaft 33 through the second reducer 31. The two sets of sprockets 34 are rotatably installed on the two first brackets 13 respectively, and the two sets of sprockets 34 are located between the two first brackets 13. The two chains 35 are installed on the sprocket shaft 33 and the two sets of sprockets 34. The multiple filter hoppers 36 are evenly spaced on the two chains 35.

[0029] like Figure 7As shown, the flushing device 04 includes a guide plate 41, a gear pump 42, a reducer 43, a motor 44, a pipe 45, and multiple nozzles 46. The guide plate 41 is fixedly installed on two supports 13. The gear pump 42 is fixedly installed on the top of the support 14. The side end of the gear pump 42 is connected to the inside of the flotation tank 12 through a hose. The reducer 43 is fixedly installed on the top of the gear pump 42. The motor 44 is fixedly installed on the top of the reducer 43, and the motor 44 provides power to the gear pump 42 through the reducer 43. The pipe 45 is installed on the side of the gear pump 42 and is fixedly installed on the support 16. Multiple nozzles are provided on the top of the pipe 45, and multiple nozzles 46 are respectively installed at the bottom of the multiple nozzles.

[0030] like Figure 8 As shown, the filtration device 05 includes two rubber pads 51, a bracket 52, a filter plate 53, and a vibration motor 54. The two rubber pads 51 are respectively installed on two brackets 15, and both rubber pads 51 are located between the two brackets 15. The bracket 52 is installed on the two rubber pads 51. The filter plate 53 is installed obliquely inside the bracket 52. The vibration motor 54 is fixedly installed on the side of the bracket 52.

[0031] First, the wastewater to be treated is introduced into the flotation tank 12. Then, motor 23 and air compressor 27 are turned on. Motor 23 provides power to drive gear pump 21 to pump the wastewater from the flotation tank 12 into dissolved air tank 25. At the same time, air compressor 27 provides power to pump air into dissolved air tank 25. Inside dissolved air tank 25, the air dissolves into the wastewater under pressure. Then, the dissolved air water is discharged into the flotation tank 12 through pipe 28. The dissolved air water releases gas due to decompression, and the flotation effect causes the scum in the wastewater to move to the surface of the wastewater. Then, motor 32 is turned on, providing power. The power passes through reducer 31, sprocket shaft 33, and sprocket 3. 4 and chain 35 transmit power to drive the filter bucket 36 to move. The movement of the filter bucket 36 collects the scum on the surface of the sewage. Then, motor 3 44 and vibrating motor 54 are turned on. Motor 3 44 provides power to drive gear pump 2 42 to pump the sewage in the flotation tank 12 into pipe 4 45. The sewage in pipe 4 45 is sprayed out through nozzle 46 to wash the filter bucket 36 and reduce the scum attached to the surface of the filter bucket 36. The guide plate 41 guides the scum that falls on the filter bucket 36. The filter plate 53 filters the collected scum and reduces the water in the scum. Vibrating motor 54 provides vibration to increase the speed of water and scum separation and at the same time causes the scum to be discharged from the machine along the inclined filter plate 53. Example 2

[0032] In addition to Example 1, it also includes:

[0033] like Figure 9As shown, the slag pushing device 06 includes a reducer 61, a motor 62, and a fan blade 63. The reducer 61 is fixedly installed at the rear end of the flotation tank 12, the motor 62 is fixedly installed at the rear end of the reducer 61, and the fan blade 63 is rotatably installed inside the flotation tank 12. The fan blade 63 passes through the flotation tank 12 and is rotatably connected to the reducer 61. The motor 62 provides power to the fan blade 63 through the reducer 61.

[0034] First, the wastewater to be treated is introduced into the flotation tank 12. Then, motor 23 and air compressor 27 are turned on. Motor 23 provides power to drive gear pump 21 to pump the wastewater from the flotation tank 12 into dissolved air tank 25. At the same time, air compressor 27 provides power to pump air into dissolved air tank 25. Inside dissolved air tank 25, the air dissolves into the wastewater under pressure. Then, the dissolved air water is discharged into the flotation tank 12 through pipe 28. The dissolved air water releases gas due to decompression, and the flotation effect causes the scum in the wastewater to move to the surface of the wastewater. Then, motor 32 is turned on. Motor 32 provides power, which is transmitted through reducer 31, sprocket shaft 33, sprocket 34 and chain 35 to drive filter hopper 36 to move. The movement of filter hopper 36 collects the scum on the surface of the wastewater. Then, motor 3 44 and vibration motor 54 are turned on. Motor 3 44 provides power to drive gear pump 2 42 to pump the sewage in flotation tank 12 into pipe 4 45. The sewage in pipe 4 45 is sprayed out through nozzle 46 to rinse filter hopper 36, reducing the scum attached to the surface of filter hopper 36. Guide plate 41 guides the scum that falls on filter hopper 36. Filter plate 53 filters the collected scum, reducing the water content in the scum. Vibration motor 54 provides vibration to increase the speed of water and scum separation, and at the same time, the scum is discharged from the machine along the inclined filter plate 53. At the same time, motor 4 62 is turned on, which provides power to drive fan blade 63 to rotate. The rotation of fan blade 63 pushes the scum on the surface of sewage forward, reducing the possibility of scum entering the discharge port of flotation tank 12 and being carried into the treated water.

[0035] like Figures 1 to 9As shown, this utility model discloses a dissolved air flotation (DAF) machine for treating wastewater. During operation, wastewater to be treated is first introduced into the flotation tank 12. Then, motor 23 and air compressor 27 are turned on. Motor 23 provides power to drive gear pump 21, drawing the wastewater from the flotation tank 12 into the dissolved air tank 25. Simultaneously, air compressor 27 provides power to pump air into the dissolved air tank 25. Inside the dissolved air tank 25, the air dissolves into the wastewater under pressure. The dissolved air water is then discharged into the flotation tank 12 through pipe 28. Due to decompression, the dissolved air water releases gas, causing the scum in the wastewater to move to the surface through flotation. Then, motor 32 is turned on, providing power. This power is transmitted through reducer 31, sprocket shaft 33, sprocket 34, and chain 35, driving the filter hopper 36 to move. The movement collects scum from the surface of the sewage. Then, motor 3 44 and vibrating motor 54 are turned on. Motor 3 44 provides power to drive gear pump 2 42 to pump the sewage in the flotation tank 12 into pipe 45. The sewage in pipe 45 is sprayed out through nozzle 46 to wash the filter hopper 36, reducing the scum adhering to the surface of the filter hopper 36. The guide plate 41 guides the scum falling from the filter hopper 36. The filter plate 53 filters the collected scum, reducing the water content in the scum. Vibrating motor 54 provides vibration to increase the speed of water and scum separation, and at the same time, the scum is discharged from the machine along the inclined filter plate 53. Simultaneously, motor 4 62 is turned on, providing power to drive fan blade 63 to rotate. The fan blade 63 rotates and pushes the scum on the surface of the sewage forward, reducing the possibility of scum entering the discharge port of the flotation tank 12 and being carried into the treated water.

[0036] The gear pump 21, motor 23, dissolved gas tank 25, air compressor 27, motor 32, sprocket shaft 33, two sets of sprockets 34, two chains 35, gear pump 42, motor 44, multiple nozzles 46, two rubber pads 51, vibration motor 54, and motor 62 of this utility model are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0037] The main functions achieved by this utility model are as follows: by setting up a collection device 03, a bucket-shaped filter screen is used to filter and collect scum, reducing the impact of mechanical vibration on the filter screen and improving the cleaning effect on sewage. Furthermore, by setting up a rinsing device 04, the filter screen is rinsed, further improving the cleaning effect on the filter screen and the sewage cleaning effect. This solves the existing technical problems that belt filters are greatly affected by vibration when filtering scum, resulting in poor sewage cleaning effect, and that cleaning the filter screen by vibration is also ineffective, leading to poor sewage cleaning effect.

[0038] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A dissolved air flotation machine for treating sewage, comprising a machine body (01); characterized in that, Also include dissolved air flotation device (02), collection device (03), flushing device (04), filter device (05) and push slag device (06), dissolved air flotation device (02), collection device (03), flushing device (04), filter device (05) and push slag device (06) are installed on the fuselage (01); The fuselage (01) holds sewage, the dissolved air flotation device (02) is dissolved air flotation to sewage, the collection device (03) collects the dregs, the flushing device (04) flushes the collection device (03), the filter device (05) filters the dregs, and the push slag device (06) reduces the possibility of dregs being brought into the treated water.

2. The dissolved air flotation machine for treating sewage according to claim 1, wherein The fuselage (01) includes a plurality of support seats (11), a flotation tank (12), two brackets one (13), a bracket two (14), two brackets three (15) and a bracket four (16), the flotation tank (12) is installed at the top end of the plurality of support seats (11), the flotation tank (12) is provided with a water outlet and a water inlet at the front end, the flotation tank (12) is provided with a feed inlet and a discharge outlet at the right end, and the feed inlet is located in front of the discharge outlet, the two brackets one (13) and the two brackets three (15) are installed at the top end of the flotation tank (12), the bracket two (14) is installed at the side end of the flotation tank (12), and the bracket four (16) is installed at the side end of the front bracket three (15).

3. The dissolved air flotation machine for treating sewage as claimed in claim 2, wherein, The dissolved air flotation device (02) includes a gear pump one (21), a reducer one (22), a motor one (23), a pipeline one (24), a dissolved air tank (25), a pipeline two (26), an air compressor (27) and a pipeline three (28), the gear pump one (21) is communicatedly installed at the front end of the water outlet of the flotation tank (12), the reducer one (22) is fixedly installed at the top end of the gear pump one (21), the motor one (23) is fixedly installed at the top end of the reducer one (22), and the motor one (23) provides power to the gear pump one (21) through the reducer one (22), the dissolved air tank (25) is fixedly installed at the front end of the water inlet of the flotation tank (12), the pipeline one (24) is installed on the gear pump one (21) and the dissolved air tank (25), the air compressor (27) is fixedly installed at the front end of the flotation tank (12), the pipeline two (26) is installed on the dissolved air tank (25) and the air compressor (27), the pipeline three (28) is communicatedly installed at the rear end of the dissolved air tank (25), and the pipeline three (28) is fixedly installed in the water inlet of the flotation tank (12), the pipeline three (28) is inclined downward from front to back.

4. The dissolved air flotation machine for treating sewage as claimed in claim 2, wherein, The collecting device (03) comprises a reducer two (31), a motor two (32), a chain wheel shaft (33), two groups of chain wheels (34), two chains (35) and a plurality of filter hoppers (36), the reducer two (31) is fixedly installed at the side end of a support one (13), the chain wheel shaft (33) is rotatably installed on the two support one (13), and the chain wheel shaft (33) is rotatably connected between a support one (13) and the reducer two (31), the motor two (32) provides power to the chain wheel shaft (33) through the reducer two (31), the two groups of chain wheels (34) are rotatably installed on the two support one (13), and the two groups of chain wheels (34) are located between the two support one (13), the two chains (35) are installed on the chain wheel shaft (33) and the two groups of chain wheels (34), and the plurality of filter hoppers (36) are uniformly and interval installed on the two chains (35).

5. The dissolved air flotation machine for treating sewage as claimed in claim 2, wherein, The flushing device (04) comprises a material guide plate (41), a gear pump two (42), a reducer three (43), a motor three (44), a pipeline four (45) and a plurality of spray heads (46), the material guide plate (41) is fixedly installed on the two support one (13), the gear pump two (42) is fixedly installed at the top end of the support two (14), the side end of the gear pump two (42) is communicated with the inside of the air flotation tank (12) through a hose, the reducer three (43) is fixedly installed at the top end of the gear pump two (42), the motor three (44) is fixedly installed at the top end of the reducer three (43), and the motor three (44) provides power to the gear pump two (42) through the reducer three (43), the pipeline four (45) is installed at the side end of the gear pump two (42), and the pipeline four (45) is fixedly installed on the support four (16), a plurality of spray ports are arranged at the top of the pipeline four (45), and the plurality of spray heads (46) are installed at the bottom ends of the plurality of spray ports.

6. The dissolved air flotation machine for treating sewage as claimed in claim 2, wherein, The filtering device (05) comprises two rubber pads (51), a support five (52), a filter plate (53) and a vibration motor (54), the two rubber pads (51) are installed on the two support three (15), and the two rubber pads (51) are located between the two support three (15), the support five (52) is installed on the two rubber pads (51), the filter plate (53) is installed in the support five (52) in an inclined manner, and the vibration motor (54) is fixedly installed at the side end of the support five (52).

7. The dissolved air flotation machine for treating sewage as claimed in claim 2, wherein, The slag pushing device (06) comprises a reducer four (61), a motor four (62) and a fan blade (63), the reducer four (61) is fixedly installed at the rear end of the air flotation tank (12), the motor four (62) is fixedly installed at the rear end of the reducer four (61), the fan blade (63) is rotatably installed in the air flotation tank (12), and the fan blade (63) is rotatably connected between the air flotation tank (12) and the reducer four (61), the motor four (62) provides power to the fan blade (63) through the reducer four (61).

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