High-efficiency dissolved air flotation machine

Abstract

The utility model relates to sewage treatment technical field, and disclose a kind of high-efficiency dissolved air flotation machine, including main body structure, the main body structure includes filter box, first motor, stirring shaft, conveyer belt, slagging-off plate and second motor, the first motor and stirring shaft are both provided with two groups, the slagging-off plate is provided with multiple groups.The utility model can be transported gas to floating gas release device by gas pipe by starting dissolved air tank, and gas bubble is sprayed outward by floating gas release device, floating gas release device can be protected by filter screen cylinder, avoid the contact of impurity in water and floating gas release device, third motor can drive connecting shaft, top cleaning brush and two groups of side edge cleaning brush synchronous rotation, top cleaning brush and two groups of side edge cleaning brush can clean the impurity on the outer surface of filter screen cylinder and inside mesh when rotating, so as to effectively avoid the situation that floating gas release device is blocked.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and more specifically, to a high-efficiency dissolved air flotation machine. Background Technology

[0002] With the increasing severity of water pollution, people are paying more and more attention to the purification and treatment of wastewater. Among various water pollution treatment equipment, common ones include centrifuges, aerators, sludge dewatering machines, and dissolved air flotation (DAF) machines. DAF machines are a type of water treatment equipment that achieves solid-liquid separation through a specific principle. Its specific working principle is as follows: First, a large number of microbubbles are generated in the wastewater using a dissolved air system, allowing air to adhere to the surface of suspended particles in the form of highly dispersed microbubbles. This process makes the density of the suspended particles with attached bubbles less than that of water. Then, using the principle of buoyancy, these particles float to the surface of the water, ultimately achieving the purpose of solid-liquid separation.

[0003] In the prior art, the flotation release device of some devices is easily clogged by impurities in the water during use, which may result in uneven bubbles and thus affect the dissolved air efficiency. In addition, it is not convenient to clean the scraper surface of some devices during use. After the scraper sweeps away the scum, some scum will remain on the scraper surface, which may affect the working efficiency of the scraper. Therefore, this utility model provides a high-efficiency dissolved air flotation machine to solve the above problems. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a high-efficiency dissolved air flotation machine with the advantages of anti-clogging and automatic cleaning of scraper.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency dissolved air flotation machine, comprising: a main structure, the main structure including a filter box, a first motor, a stirring shaft, a conveyor belt, a slag scraper and a second motor, the first motor and the stirring shaft each having two sets, the slag scraper having multiple sets, the filter box having a partition inside, and the partition having two sets, and the filter box having a slag collection box inside the other end; The air flotation structure includes a dissolved air tank, an air release device, a filter screen cylinder, a third motor, a top cleaning brush and a side cleaning brush, and two sets of side cleaning brushes are provided. The dissolved air tank is fixedly connected to the outer surface of one side of the filter box. An air supply pipe is connected inside the dissolved air tank, and one end of the air supply pipe is connected to the inside of the lower surface of the air release device. The cleaning structure includes a fixed seat, a limiting rod, a pressure spring, a threaded rod, and a scraper. The fixed seat, the limiting rod, and the pressure spring are each provided in two sets, and the two sets of fixed seats are respectively fixedly connected to the other end of the upper surface of the filter box.

[0006] As a preferred embodiment of this utility model, the two sets of first motors are respectively installed at one end of the upper surface of the filter box, the two sets of stirring shafts are respectively fixedly connected to the output shafts of the two sets of first motors, and the two sets of stirring shafts are disposed inside one end of the filter box.

[0007] As a preferred embodiment of this utility model, the conveyor belt is installed on the upper surface of the filter box, multiple sets of scraper blades are fixedly connected to the outer surface of the conveyor belt, the second motor is installed on the upper surface of the filter box, and the output shaft of the second motor is fixedly connected to the drive wheel inside the conveyor belt.

[0008] As a preferred technical solution of this utility model, the interior of one side surface of the filter box is connected to a slag discharge tank and a drain pipe, and the drain pipe is located at the lower end of the slag discharge tank. The interior of the slag discharge tank is connected to the interior of the slag collection box, and valves are installed inside both the slag discharge tank and the drain pipe.

[0009] As a preferred embodiment of this utility model, the air release device and the filter screen cylinder are both fixedly connected to the lower surface inside the filter box, the air release device is located inside the filter screen cylinder, and the third motor is installed on the surface of one side of a set of partitions.

[0010] As a preferred technical solution of this utility model, a connecting shaft is fixedly connected to the output shaft of the third motor, and a limiting seat is connected to the outer surface of the middle position of the connecting shaft by a bearing. The two ends of the limiting seat are fixedly connected to the surfaces of the two sets of partitions on opposite sides. The top cleaning brush is fixedly connected to the lower end of the connecting shaft. The two sets of side cleaning brushes are respectively fixedly connected to the lower surfaces of the two ends of the top cleaning brush. The lower surface of the top cleaning brush is attached to the upper surface of the filter cylinder, and the surfaces of the two sets of side cleaning brushes on opposite sides are attached to the outer ring surface of the filter cylinder.

[0011] As a preferred embodiment of this utility model, the two sets of limiting rods are respectively fixedly connected to the inside of the two sets of fixed seats, the two sets of pressure springs are respectively sleeved on the outer surface of the two sets of limiting rods, the upper end of the two sets of fixed seats is fixedly connected to a fixed plate, and the threaded rod is threadedly connected to the inside of the middle position of the fixed plate.

[0012] As a preferred technical solution of this utility model, a connecting plate is slidably connected to the outer surface of the two sets of limiting rods, and the lower surfaces of both ends of the connecting plate are respectively attached to the upper ends of the two sets of pressure springs. The upper end of the scraper is fixedly connected to the lower surface of the fixing plate, and the position of the lower end of the scraper is adapted to the position of the multiple sets of slag scraping plates.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model enables the dissolved air tank to deliver gas to the flotation air releaser through the gas supply pipe, and the flotation air releaser sprays bubbles outward. The filter screen protects the flotation air releaser, preventing impurities in the water from contacting it. Starting the third motor drives the connecting shaft, the top cleaning brush, and the two sets of side cleaning brushes to rotate synchronously. When rotating, the top cleaning brush and the two sets of side cleaning brushes can clean impurities on the outer surface of the filter screen and inside the mesh, thereby effectively preventing the flotation air releaser from clogging.

[0014] 2. This utility model can drive the connecting plate and scraper to move longitudinally by rotating the threaded rod, and can adjust the distance between the scraper and multiple sets of scraper plates. When the conveyor belt is in motion, it can drive multiple sets of scraper plates to move and scrape off impurities on the water surface. When the lower end of the scraper is attached to the outer surface of the scraper plate, it can scrape off the impurities attached to the outer surface, thereby avoiding the impurities from affecting the scraping process of multiple sets of scraper plates. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional schematic diagram of the present invention; Figure 3 This is a partial cross-sectional schematic diagram of the air flotation structure of this utility model; Figure 4 This is a schematic cross-sectional view of the air flotation structure of this utility model; Figure 5 This is a schematic diagram of the cleaning structure of this utility model; Figure 6 This is a schematic diagram of the cleaning structure of this utility model in use.

[0016] In the diagram: 1. Main structure; 11. Filter box; 12. First motor; 13. Stirring shaft; 14. Conveyor belt; 15. Slag scraper; 16. Second motor; 17. Slag discharge tank; 18. Drainage pipe; 2. Air flotation structure; 21. Dissolved air tank; 22. Air supply pipe; 23. Float release device; 24. Filter screen cylinder; 25. Third motor; 26. Connecting shaft; 27. Limiting seat; 28. Top cleaning brush; 29. ​​Side cleaning brush; 3. Cleaning structure; 31. Fixed seat; 32. Limiting rod; 33. Pressure spring; 34. Fixed plate; 35. Threaded rod; 36. Connecting plate; 37. Scraper. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1 to 6 As shown, this utility model provides a high-efficiency dissolved air flotation machine, including... The main structure 1 includes a filter box 11, a first motor 12, a stirring shaft 13, a conveyor belt 14, a slag scraper 15 and a second motor 16. The first motor 12 and the stirring shaft 13 are each provided with two sets. The slag scraper 15 is provided with multiple sets. The filter box 11 is provided with a partition, and there are two sets of partitions. The filter box 11 is provided with a slag collection box at the other end. The air flotation structure 2 includes a dissolved air tank 21, an air release device 23, a filter screen cylinder 24, a third motor 25, a top cleaning brush 28 and a side cleaning brush 29, and two sets of side cleaning brushes 29 are provided. The dissolved air tank 21 is fixedly connected to the outer surface of one side of the filter box 11. The interior of the dissolved air tank 21 is connected to an air supply pipe 22, and one end of the air supply pipe 22 is connected to the interior of the lower surface of the air release device 23. Cleaning structure 3 includes a fixed seat 31, a limiting rod 32, a pressure spring 33, a threaded rod 35, and a scraper 37. The fixed seat 31, the limiting rod 32, and the pressure spring 33 are each provided in two sets. The two sets of fixed seats 31 are respectively fixedly connected to the other end of the upper surface of the filter box 11.

[0019] Two sets of first motors 12 are respectively installed at one end of the upper surface of the filter box 11, and two sets of stirring shafts 13 are respectively fixedly connected to the output shafts of the two sets of first motors 12. The two sets of stirring shafts 13 are located inside one end of the filter box 11.

[0020] By starting the two sets of first motors 12, the two sets of stirring shafts 13 can be driven to rotate inside one end of the filter box 11. Before starting the two sets of first motors 12, the sewage and chemical agents are added to the end of the filter box 11 near the first motors 12 at a volume ratio of 100:1 to 100:5. The rotation of the two sets of stirring shafts 13 makes the sewage and chemical agents inside the filter box 11 mix more evenly.

[0021] The conveyor belt 14 is installed on the upper surface of the filter box 11, multiple sets of scraper blades 15 are fixedly connected to the outer surface of the conveyor belt 14, the second motor 16 is installed on the upper surface of the filter box 11, and the output shaft of the second motor 16 is fixedly connected to the drive wheel inside the conveyor belt 14.

[0022] By starting the second motor 16, the conveyor belt 14 can be driven to move, and the conveyor belt 14 can drive multiple sets of scraper blades 15 to move synchronously. The multiple sets of scraper blades 15 can scrape the floating scum generated on the upper surface of the filter box 11 into the inside of the scum collection box during the movement.

[0023] The filter box 11 has a slag discharge tank 17 and a drain pipe 18 connected to the interior of one side surface. The drain pipe 18 is located at the lower end of the slag discharge tank 17. The slag discharge tank 17 is connected to the interior of the slag collection box. Valves are installed inside both the slag discharge tank 17 and the drain pipe 18.

[0024] By opening the valve inside the slag discharge tank 17, impurities inside the slag collection box can be discharged to the outside, and by opening the valve inside the drain pipe 18, filtered wastewater can be discharged to the outside.

[0025] The air release device 23 and the filter screen cylinder 24 are both fixedly connected to the lower surface inside the filter box 11. The air release device 23 is located inside the filter screen cylinder 24, and the third motor 25 is installed on the surface of one side of a set of partitions.

[0026] By activating the dissolved air tank 21, gas can be supplied to the flotation air releaser 23 through the gas supply pipe 22, and bubbles can be ejected outward through the flotation air releaser 23. The flotation air releaser 23 is made of porous ceramic material with a release hole diameter of 50-100μm. After the bubbles come into contact with impurities in the sewage, they will form scum with a density less than water. Then, the scum will rise to the water surface under the action of buoyancy. The flotation air releaser 23 can be protected by the filter screen cylinder 24. The filter screen cylinder 24 is made of 304 stainless steel with a cylinder wall thickness of 2-5mm and a filter mesh count of 100-200 mesh, corresponding to a hole diameter of 150-75μm. The height of the cylinder is the same as that of the flotation air releaser 23 to prevent impurities in the water from coming into contact with the flotation air releaser 23, thereby effectively preventing the flotation air releaser 23 from clogging.

[0027] Among them, the output shaft of the third motor 25 is fixedly connected to the connecting shaft 26, and the outer surface of the connecting shaft 26 at the middle position is connected to the bearing of the limiting seat 27. The two ends of the limiting seat 27 are fixedly connected to the surfaces of the two sets of partitions on opposite sides. The top cleaning brush 28 is fixedly connected to the lower end of the connecting shaft 26. The two sets of side cleaning brushes 29 are respectively fixedly connected to the lower surfaces of the two ends of the top cleaning brush 28. The lower surface of the top cleaning brush 28 is attached to the upper surface of the filter cylinder 24, and the surfaces of the two sets of side cleaning brushes 29 on opposite sides are attached to the outer ring surface of the filter cylinder 24.

[0028] By starting the third motor 25, the connecting shaft 26, the top cleaning brush 28, and the two sets of side cleaning brushes 29 can be rotated synchronously. The setting of the limit seat 27 can improve the stability of the connecting shaft 26 during rotation and prevent the connecting shaft 26 from swinging during rotation. When the top cleaning brush 28 and the two sets of side cleaning brushes 29 rotate, they can clean the impurities on the outer surface of the filter cylinder 24 and inside the mesh, thereby effectively preventing the mesh of the filter cylinder 24 from being blocked by impurities, so that the bubbles generated by the air releaser 23 can be discharged normally through the filter cylinder 24.

[0029] Two sets of limiting rods 32 are fixedly connected to the inside of two sets of fixed seats 31, two sets of pressure springs 33 are respectively sleeved on the outer surface of the two sets of limiting rods 32, and fixed plates 34 are fixedly connected to the upper ends of the two sets of fixed seats 31. Threaded rods 35 are threadedly connected to the inside of the middle position of the fixed plates 34.

[0030] The threaded rod 35 can be moved longitudinally inside the fixed plate 34 by rotating it, and a handwheel is provided at the upper end of the threaded rod 35, making it easier for the operator to rotate the threaded rod 35.

[0031] Among them, a connecting plate 36 is slidably connected to the outer surface of the two sets of limiting rods 32, and the lower surfaces of the two ends of the connecting plate 36 are respectively attached to the upper ends of the two sets of pressure springs 33. The upper end of the scraper 37 is fixedly connected to the lower surface of the fixing plate 34, and the position of the lower end of the scraper 37 is adapted to the position of the multiple sets of slag scraping plates 15.

[0032] The movement of the threaded rod 35 drives the connecting plate 36 and the scraper 37 to move longitudinally synchronously. The two sets of limiting rods 32 improve the stability of the connecting plate 36 during movement. When the connecting plate 36 moves, it can abut against the two sets of pressure springs 33 to retract. At this time, the two sets of pressure springs 33 can exert an upward force on the connecting plate 36 through their own elasticity, thereby preventing the connecting plate 36 and the scraper 37 from moving downward. The pressure springs 33 are made of stainless steel and coated with polytetrafluoroethylene (PTFE). The PTFE coating has the characteristics of acid resistance, alkali resistance, and organic solvent resistance, which can prevent the pressure springs 33 from being corroded by sewage and improve their service life. When multiple sets of scraper plates 15 are driven, the scraper 37 can scrape off the impurities on its outer surface. The scraper 37 is made of deformable and bendable nitrile rubber material to ensure that the scraper 37 can be bent and deformed, while having a certain supporting force. The overall thickness of the scraper 37 is 8-12mm, and the width of the scraper 37 is the same as the width of the scraper plate 15.

[0033] The working principle and usage process of this utility model are as follows: First, wastewater and chemical agents are added to the interior of one end of the filter box 11. Then, two sets of first motors 12 are started to drive two sets of stirring shafts 13 to rotate, so as to fully mix the wastewater and chemical agents. Then, the dissolved gas tank 21 is started to transport gas to the interior of the flotation release device 23. Then, bubbles are sprayed outward through the flotation release device 23. Then, the third motor 25 is started to drive the connecting shaft 26, the top cleaning brush 28 and the two sets of side cleaning brushes 29 to rotate and clean the outer surface of the filter screen cylinder 24. Then, after the bubbles come into contact with the impurities in the wastewater, they will form scum with a density less than water. Then, the scum will rise to the water surface under the action of buoyancy. Then, the second motor 16 is started to drive the conveyor belt 14 and multiple sets of scraper blades 15 to drive. When the multiple sets of scraper blades 15 are driven, they can scrape the scum on the surface of the water into the interior of the scum collection box. Then, when the lower end of the scraper 37 is in contact with the outer surface of the multiple sets of scraper blades 15, it can scrape off the impurities on the outer surface.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency dissolved air flotation machine, characterized in that, include: The main structure (1) includes a filter box (11), a first motor (12), a stirring shaft (13), a conveyor belt (14), a slag scraper (15) and a second motor (16). The first motor (12) and the stirring shaft (13) are each provided with two sets. The slag scraper (15) is provided with multiple sets. The filter box (11) is provided with a partition, and the partition is provided with two sets. The filter box (11) is provided with a slag collection box at the other end. The air flotation structure (2) includes a dissolved air tank (21), an air release device (23), a filter screen cylinder (24), a third motor (25), a top cleaning brush (28) and a side cleaning brush (29), and the side cleaning brush (29) is provided in two sets. The dissolved air tank (21) is fixedly connected to the outer surface of one side of the filter box (11). The interior of the dissolved air tank (21) is connected to an air supply pipe (22), and one end of the air supply pipe (22) is connected to the interior of the lower surface of the air release device (23). The cleaning structure (3) includes a fixed seat (31), a limiting rod (32), a pressure spring (33), a threaded rod (35), and a scraper (37). The fixed seat (31), the limiting rod (32), and the pressure spring (33) are provided in two sets. The two sets of fixed seats (31) are respectively fixedly connected to the other end of the upper surface of the filter box (11).

2. The high-efficiency dissolved air flotation machine according to claim 1, characterized in that: Two sets of the first motors (12) are respectively installed at one end of the upper surface of the filter box (11), and two sets of stirring shafts (13) are respectively fixedly connected to the output shafts of the two sets of first motors (12). The two sets of stirring shafts (13) are located inside one end of the filter box (11).

3. The high-efficiency dissolved air flotation machine according to claim 1, characterized in that: The conveyor belt (14) is installed on the upper surface of the filter box (11), and multiple sets of scraper blades (15) are fixedly connected to the outer surface of the conveyor belt (14). The second motor (16) is installed on the upper surface of the filter box (11), and the output shaft of the second motor (16) is fixedly connected to the drive wheel inside the conveyor belt (14).

4. The high-efficiency dissolved air flotation machine according to claim 1, characterized in that: The filter box (11) has a slag discharge tank (17) and a drain pipe (18) connected to the interior of one side surface, and the drain pipe (18) is located at the lower end of the slag discharge tank (17). The slag discharge tank (17) is connected to the interior of the slag collection box. Valves are installed inside both the slag discharge tank (17) and the drain pipe (18).

5. The high-efficiency dissolved air flotation machine according to claim 1, characterized in that: The air release device (23) and the filter cylinder (24) are both fixedly connected to the lower surface inside the filter box (11). The air release device (23) is located inside the filter cylinder (24). The third motor (25) is installed on the surface of one side of a set of partitions.

6. The high-efficiency dissolved air flotation machine according to claim 1, characterized in that: A connecting shaft (26) is fixedly connected to the output shaft of the third motor (25), and a bearing seat (27) is connected to the outer surface of the middle position of the connecting shaft (26). The two ends of the bearing seat (27) are fixedly connected to the surfaces of the two sets of partitions on opposite sides. The top cleaning brush (28) is fixedly connected to the lower end of the connecting shaft (26). The two sets of side cleaning brushes (29) are fixedly connected to the lower surfaces of the two ends of the top cleaning brush (28). The lower surface of the top cleaning brush (28) is attached to the upper surface of the filter cylinder (24). The surfaces of the two sets of side cleaning brushes (29) on opposite sides are attached to the outer ring surface of the filter cylinder (24).

7. The high-efficiency dissolved air flotation machine according to claim 1, characterized in that: The two sets of limiting rods (32) are fixedly connected to the inside of the two sets of fixed seats (31), the two sets of pressure springs (33) are respectively sleeved on the outer surface of the two sets of limiting rods (32), the upper end of the two sets of fixed seats (31) is fixedly connected to a fixed plate (34), and the threaded rod (35) is threadedly connected to the inside of the middle position of the fixed plate (34).

8. The high-efficiency dissolved air flotation machine according to claim 1, characterized in that: A connecting plate (36) is slidably connected to the outer surface of the two sets of limiting rods (32), and the lower surfaces of the two ends of the connecting plate (36) are respectively attached to the upper ends of the two sets of pressure springs (33). The upper end of the scraper (37) is fixedly connected to the lower surface of the fixing plate (34), and the position of the lower end of the scraper (37) is adapted to the position of the multiple sets of slag scraping plates (15).

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