A flotation treatment device for rural livestock breeding wastewater

Abstract

This invention relates to the technical field of wastewater treatment, and in particular to a flotation treatment device for rural livestock breeding wastewater. The device includes a flotation tank, an inlet pipe, an aeration valve, an overflow pipe, and a sludge discharge structure. The flotation tank has a horizontal axis and an arc-shaped vertical cross-section perpendicular to its own axis. The opening of the flotation tank faces upwards. The flotation tank is used to store wastewater. The inlet pipe, aeration valve, overflow pipe, and sludge discharge structure are all installed on the flotation tank. The inlet pipe supplies water to the flotation tank. By transporting air bubbles, the bubbles are repeatedly moved to the bottom of the water and subjected to flotation treatment, allowing for multiple uses of the bubbles. This facilitates multiple adsorption treatments of impurities in the wastewater by the bubbles, increasing the amount of impurities adsorbed by each bubble and ensuring full utilization of the bubbles. This allows for efficient flotation of wastewater with reduced bubble volume, reducing energy consumption and operating costs.

Description

Technical Field

[0001] This invention relates to the technical field of wastewater treatment, and in particular to a flotation treatment device for wastewater from rural livestock farming. Background Technology

[0002] With the development of animal husbandry, especially the popularization of intensive farming, rural areas are facing increasingly serious environmental pollution problems. Among them, wastewater from livestock and poultry farming has become one of the main sources of pollution due to its high concentration of organic matter, nitrogen, phosphorus and other pollutants. This untreated sewage is directly discharged into the environment, which not only pollutes surface water and groundwater, but also has a negative impact on soil quality and may affect human health through the food chain.

[0003] To address this issue, it is particularly important to develop efficient and cost-effective wastewater treatment technologies, especially in rural areas where traditional wastewater treatment methods often fail to meet actual needs due to limited funding and technical resources. Therefore, it is necessary to explore new wastewater treatment technologies suitable for local conditions.

[0004] Air flotation is an effective water treatment method, particularly suitable for removing suspended solids, grease, and other light pollutants from water. Its basic principle is to generate a large number of tiny bubbles in the water. These bubbles can attach to pollutant particles, thereby reducing their density and causing them to float to the surface for collection and removal. Traditional air flotation methods require laying a large number of aeration valves, exhaust pipes, and other structures at the bottom of the air flotation tank to generate a large number of bubbles. This method not only increases the complexity of the structure and the pressure and volume of bubbles during transport, thus increasing costs, but also reduces the effective adsorption capacity of the bubbles, meaning that the amount of impurities adsorbed by a single bubble or in a unit area is less, resulting in a low utilization rate of the bubbles. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a flotation treatment device for rural livestock breeding wastewater, the specific technical solution of which is as follows:

[0006] A flotation treatment device for rural livestock breeding wastewater includes a flotation box, an inlet pipe, an aeration valve, an overflow pipe, and a sludge discharge structure. The flotation box has a horizontal axis and an arc-shaped vertical cross-section perpendicular to its own axis. The opening of the flotation box faces upward. The flotation box is used to store wastewater. The inlet pipe, aeration valve, overflow pipe, and sludge discharge structure are all installed on the flotation box. The inlet pipe is used to supply water to the flotation box, the aeration valve is used to discharge air bubbles into the flotation box, the overflow pipe is used to discharge the water after flotation treatment, and the sludge discharge structure is used to discharge impurities that have floated on the water surface.

[0007] The air flotation box has two rotating rings rotatably arranged inside, with the two rotating rings located at opposite ends of the air flotation box. A support plate is arranged between the two rotating rings, and multiple storage hoppers are arranged on the support plate.

[0008] Furthermore, an annular groove is provided on the end face of the air flotation box on the inner side of the rotating ring, the top of the annular groove is set as a horizontal part, and two guide columns are slidably arranged in the annular groove, both of which are fixedly connected to the support plate.

[0009] The annular groove is coaxial with the air flotation box.

[0010] Furthermore, the bottom of the annular groove is configured as an arc-shaped portion, with the height gradually decreasing from one end of the arc-shaped portion to the other end, and the center of the arc-shaped portion and its lowest point are on the same vertical line.

[0011] Furthermore, a connecting shaft is rotatably provided on the rotating ring, and a sliding plate is fixedly connected to the connecting shaft. The sliding plate is along the radial direction of the connecting shaft, and the support plate is slidably mounted on the sliding plate.

[0012] Furthermore, a connecting rod is connected between the two sliding plates. The connecting rod consists of an arc surface and an inclined surface, and the arc surface of the connecting rod is tangent to the outer circumference of the rotating ring.

[0013] Furthermore, a vertical barrel is connected to the bottom of the air flotation tank, and an aeration valve is installed inside the vertical barrel.

[0014] Furthermore, the slag discharge structure includes a collection trough installed on the arc-shaped outer wall of the flotation tank, the collection trough being connected to the interior of the flotation tank, a discharge trough being provided on the outer wall of the collection trough, a first motor rolling on the collection trough, a first rotating shaft being provided at the output end of the first motor, and multiple scooping nets being provided on the first rotating shaft, and a slag-removing plate being laterally slidably provided on the discharge trough, the slag-removing plate being connected to the discharge trough by a spring.

[0015] Furthermore, the air flotation box is rotatably provided with a second rotating shaft, and the second rotating shaft is provided with two transmission wheels, which are respectively connected to two rotating rings. The air flotation box is provided with a second motor for providing power to the second rotating shaft.

[0016] The advantages of this invention are:

[0017] By transporting the air bubbles and repeatedly moving them to the bottom for flotation treatment, the bubbles can be reused multiple times. This allows for repeated adsorption of impurities in the wastewater, increasing the amount of impurities adsorbed by each bubble and maximizing their utilization. This achieves thorough flotation of wastewater with reduced bubble volume, decreasing energy consumption and operating costs. Compared to traditional flotation equipment, this solution reduces complex aeration valve arrangements and exhaust pipes, making the equipment simpler and lowering overall costs. The use of a collection bucket to capture and re-release bubbles increases the opportunity for bubbles to contact impurities, improving adsorption efficiency. The conical design facilitates more effective bubble capture and release, enhancing the bubbles' adsorption capacity for impurities. The equipment is simple in structure, easy to operate, and has low operating costs, making it more suitable for rural wastewater treatment. In conclusion, this rural livestock wastewater flotation treatment equipment, through optimized design, achieves more efficient, economical, and environmentally friendly wastewater treatment goals, making it highly suitable for rural applications. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of the air-floating box;

[0021] Figure 3 yes Figure 1 Enlarged schematic diagram of the central annular groove;

[0022] Figure 4 yes Figure 2 Enlarged structural diagram of the middle support plate and connecting rod;

[0023] Figure 5 yes Figure 4 Enlarged cross-sectional view of the central connecting rod;

[0024] Figure 6 yes Figure 1 Enlarged schematic diagram of the central slag discharge structure;

[0025] Reference numerals in the attached drawings: 1. Flotation tank; 2. Inlet pipe; 3. Aeration valve; 4. Overflow pipe; 5. Slag discharge structure; 6. Rotating ring; 7. Support plate; 8. Collection hopper; 9. Annular trough; 10. Horizontal section; 11. Guide column; 12. Arc-shaped section; 13. Connecting shaft; 14. Slide plate; 15. Connecting rod; 16. Vertical bucket; 17. Collection trough; 18. Discharge trough; 19. First motor; 20. First rotating shaft; 21. Salvage net plate; 22. Slag removal plate; 23. Spring; 24. Second rotating shaft; 25. Transmission wheel; 26. Second motor. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] In the description of this invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. This embodiment is written in a progressive manner.

[0029] like Figures 1 to 6 As shown, the present invention provides a flotation treatment device for rural livestock breeding wastewater, comprising a flotation box 1, an inlet pipe 2, an aeration valve 3, an overflow pipe 4, and a slag discharge structure 5. The flotation box 1 has a horizontal axis and an arc-shaped vertical cross-section perpendicular to its own axis. The opening of the flotation box 1 faces upward. The flotation box 1 is used to store wastewater. The inlet pipe 2, the aeration valve 3, the overflow pipe 4, and the slag discharge structure 5 are all installed on the flotation box 1. The inlet pipe 2 is used to supply water into the flotation box 1, the aeration valve 3 is used to discharge air bubbles into the flotation box 1, the overflow pipe 4 is used to discharge the water after flotation treatment, and the slag discharge structure 5 is used to discharge impurities that have been flotated on the water surface.

[0030] The air flotation box 1 is equipped with two rotating rings 6, which are located at both ends of the air flotation box 1. A support plate 7 is provided between the two rotating rings 6, and multiple storage hoppers 8 are provided on the support plate 7.

[0031] In detail, the flotation tank 1 is cylindrical with a horizontal axis and an open top. The inlet pipe 2 and overflow pipe 4 are located at opposite ends of the flotation tank 1. Wastewater enters the flotation tank 1 through the inlet pipe 2 and flows laterally along the axis of the flotation tank 1. When the wastewater reaches the overflow pipe 4, it can be discharged through the overflow pipe 4. The aeration valve 3 is used to introduce air bubbles into the flotation tank 1, thereby using the air bubbles to perform flotation and impurity removal treatment on the wastewater in the flotation tank 1. The sludge removal structure 5 is installed on the side of the flotation tank 1 near the overflow pipe 4. Due to the water flow in the flotation tank 1 and the ripple effect on the water surface caused by the sewage discharged into the flotation tank 1 through the inlet pipe 2, the impurities of the horizontal flotation move laterally and are discharged through the slag discharge structure 5. Both rotating rings 6 are coaxial with the flotation tank 1. The two rotating rings 6 are respectively rotatably installed on the two end faces inside the flotation tank 1, and the two rotating rings 6 are used to support the support plate 7 and multiple collection hoppers 8 on it. The opening shape of the collection hopper 8 is conical, and there is a gap between two adjacent collection hoppers 8 for water to pass through.

[0032] During operation, wastewater is introduced into the flotation tank 1 through the inlet pipe 2. The wastewater level in the flotation tank 1 is maintained at a specified position by the overflow pipe 4. The aeration valve 3 is located on the side near the inlet pipe 2 and discharges air bubbles into the water, thereby using the air bubbles to treat impurities in the water through flotation. Rotating the two rotating rings 6 causes them to move in a circular motion around the axis of the flotation tank 1. The rotating rings 6 drive the support plate 7 and multiple collection hoppers 8 to move synchronously. When the collection hoppers 8 move to the water surface, they collect the horizontal air bubbles. As the collection hoppers 8 move, they cause the air bubbles to move back to the bottom position in the flotation tank 1. The bubbles are released and rise back to the surface from the bottom, thus performing flotation again. As the rotating ring 6 continues to rotate, multiple collection hoppers 8 repeatedly carry the bubbles to the bottom and back to the surface, allowing the bubbles to be reused multiple times without needing to generate a large number of bubbles to achieve flotation. Since the water in the flotation tank 1 flows from the inlet pipe 2 to the overflow pipe 4, the bubbles and the impurities they adsorb can move laterally within the flotation tank 1. This allows the flotation impurities to gather towards the slag discharge structure 5 during repeated flotation, and the slag discharge structure 5 can then discharge the impurities. The water treated by flotation can overflow through the overflow pipe 4, thus achieving the flotation process.

[0033] By transporting the air bubbles, they are repeatedly moved to the bottom of the water for flotation treatment, allowing for multiple uses of the bubbles. This facilitates repeated adsorption of impurities in the wastewater by the bubbles, increasing the amount of impurities adsorbed by each bubble and ensuring full utilization of the bubbles. This allows for efficient flotation of wastewater with reduced bubble volume, decreasing energy consumption and operating costs. Compared to traditional flotation equipment, this solution reduces complex aeration valve arrangements and exhaust pipes, making the equipment simpler and lowering overall costs. The use of a collection hopper (8) to capture and release bubbles increases the opportunity for bubbles to contact impurities, improving adsorption efficiency. The conical design helps to more effectively capture and release bubbles, enhancing their adsorption capacity for impurities. The equipment is simple in structure, easy to operate, and has low operating costs, making it more suitable for rural wastewater treatment. In conclusion, this rural livestock wastewater flotation treatment equipment, through optimized design, achieves more efficient, economical, and environmentally friendly wastewater treatment goals, making it highly suitable for application in rural areas.

[0034] Furthermore, an annular groove 9 is provided on the end face of the air flotation box 1 inside the rotating ring 6, the top of the annular groove 9 is set as a horizontal part 10, and two guide posts 11 are slidably arranged in the annular groove 9, both guide posts 11 are fixedly connected to the support plate 7.

[0035] The annular groove 9 is coaxial with the air flotation box 1.

[0036] In detail, when the rotating ring 6 drives the support plate 7 to move, the support plate 7 will slide within the annular groove 9 by driving the two guide posts 11 on it. The two guide posts 11 can guide the support plate 7. When the guide posts 11 slide within the horizontal part 10, the two guide posts 11 move horizontally. At this time, the support plate 7 and multiple collection buckets 8 move horizontally, so that the multiple collection buckets 8 horizontally gather the bubbles on the liquid surface. This avoids the situation where the collection buckets 8 need to occupy part of the water surface area when moving out of the water and into the water when they follow the rotating ring 6 to make arc movements on the liquid surface. In this way, the collection area of ​​the collection buckets 8 for gathering bubbles on the water surface is smaller and the collection time is shorter.

[0037] Furthermore, the bottom of the annular groove 9 is configured as an arc-shaped portion 12, the height of which gradually decreases from one end to the other end, and the center of the arc-shaped portion 12 and its lowest point are on the same vertical line.

[0038] In detail, when the two guide columns 11 slide within the arc-shaped portion 12, the opening of the receiving bucket 8 tilts downwards, and as the guide columns 11 move towards the lowest point of the arc-shaped portion 12, the receiving bucket 8 gradually flips upwards until its opening direction is horizontal. During this process, as the tilt angle of the receiving bucket 8 gradually changes, the receiving bucket 8 can gradually release the air bubbles it has gathered, thereby allowing the receiving bucket 8 to evenly spread the air bubbles on the bottom of the air flotation box 1, facilitating the large-area diffusion of the air bubbles.

[0039] Furthermore, a connecting shaft 13 is rotatably provided on the rotating ring 6, and a sliding plate 14 is fixedly connected to the connecting shaft 13. The sliding plate 14 is along the radial direction of the connecting shaft 13, and the support plate 7 is slidably installed on the sliding plate 14.

[0040] In detail, since the support plate 7 needs to move along the trajectory of the annular groove 9, and the two guide posts 11 in the annular groove 9 play a guiding role for the support plate 7, the support plate 7 needs to be rotatably connected to the rotating ring 6 through the connecting shaft 13, and the support plate 7 slides on the sliding plate 14, thereby realizing the connection between the rotating ring 6 and the support plate 7.

[0041] Furthermore, a connecting rod 15 is connected between the two sliding plates 14. The connecting rod 15 is composed of an arc surface and an inclined surface, and the arc surface of the connecting rod 15 is tangent to the outer circumference of the rotating ring 6.

[0042] In detail, due to the movement of multiple collecting buckets 8, some air bubbles on the water surface will be driven to the inner wall of the flotation tank 1. The air bubbles at this position cannot be captured by the collecting buckets 8. Through the setting of the connecting rod 15, the connecting rod 15 can be easily pressed down into the water. The air bubbles can float to the horizontal level through the gap between the connecting rod 15 and the support plate 7 using the inclined surface on the connecting rod 15. At this time, the air bubbles are far away from the inner wall of the flotation tank 1, thus making it convenient to capture these air bubbles using the collecting buckets 8.

[0043] Since the direction of the support plate 7 is determined by the two guide posts 11, the arc surface of the connecting rod 15 can ensure that when the connecting shaft 13 rotates, the arc surface of the connecting rod 15 can contact the inner wall of the air flotation box 1. Thus, when the slide plate 14 and the support plate 7 are at any angle, the connecting rod 15 can press down the air bubbles on the inner wall of the air flotation box 1 through the arc surface, and the inclined surface of the connecting rod 15 can guide the air bubbles.

[0044] Furthermore, a vertical barrel 16 is connected to the bottom of the air flotation box 1, and an aeration valve 3 is installed inside the vertical barrel 16.

[0045] In detail, by setting the vertical barrel 16, the aeration valve 3 can be easily hidden inside, so that the aeration valve 3 will not interfere with the movement of the connecting rod 15.

[0046] Furthermore, the slag discharge structure 5 includes a collection trough 17 installed on the arc-shaped outer wall of the flotation tank 1. The collection trough 17 is connected to the interior of the flotation tank 1. A discharge trough 18 is provided on the outer wall of the collection trough 17. A first motor 19 is rolled on the collection trough 17. A first rotating shaft 20 is provided at the output end of the first motor 19. Multiple scooping nets 21 are provided on the first rotating shaft 20. A slag-removing plate 22 is slidably arranged on the discharge trough 18. The slag-removing plate 22 is connected to the discharge trough 18 through a spring piece 23.

[0047] In detail, the collection tank 17 is located on the side of the receiving bucket 8 that enters the water, and the collection tank 17 is close to the overflow pipe 4. In this way, as the receiving bucket 8 moves laterally on the water surface, the receiving bucket 8 can push the air-flotated impurities into the collection tank 17. Since the collection tank 17 is close to the overflow pipe 4, the air bubbles at this position have completed multiple air-flotation operations and have fully adsorbed a sufficient amount of impurities.

[0048] The first motor 19 can drive multiple scooping net plates 21 to rotate via the first rotating shaft 20. The scooping net plates 21 can push impurities in the collection trough 17 into the discharge trough 18. The slag-scraping plate 22 is located vertically below the first rotating shaft 20. When the scooping net plates 21 carry the impurities in the collection trough 17 out, the tilted scooping net plates 21 will contact the slag-scraping plate 22. Since the rotation axis of the scooping net plates 21 is higher than the scooping net plates 21, the scooping net plates 21 can generate a tilting thrust on the slag-scraping plate 22. The slag-scraping plate 22 moves away from the first rotating shaft 20, and the spring 23 undergoes elastic deformation. The slag-scraping plate 22 can scrape the impurities scooped from the scooping net plates 21 into the discharge trough 18, thereby realizing the collection of impurities. The impurities in the discharge trough 18 can be discharged naturally.

[0049] Furthermore, a second rotating shaft 24 is rotatably provided on the air flotation box 1, and two transmission wheels 25 are provided on the second rotating shaft 24. The two transmission wheels 25 are respectively connected to two rotating rings 6. A second motor 26 is provided on the air flotation box 1 to provide power to the second rotating shaft 24.

[0050] In detail, the second motor 26 is fixed on the air flotation box 1. The second motor 26 can provide power to the two transmission wheels 25 through the second rotating shaft 24. The two transmission wheels 25 can drive the two rotating rings 6 to rotate synchronously, thereby providing power for the movement of multiple storage buckets 8.

[0051] The above description is only a preferred embodiment of the present invention. 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 invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A rural livestock breeding sewage air flotation treatment device, characterized in that, The air float tank (1), the water inlet pipe (2), the aeration valve (3), the overflow pipe (4) and the residue discharge structure (5), the air float tank (1) axis is horizontal, the air float tank (1) along the vertical section shape of its own axis is arc, the air float tank (1) opening faces upward, the air float tank (1) is used to store sewage, the water inlet pipe (2), the aeration valve (3), the overflow pipe (4) and the residue discharge structure (5) are all installed on the air float tank (1), the water inlet pipe (2) is used to supply water to the air float tank (1), the aeration valve (3) is used to discharge air bubble to the air float tank (1), the overflow pipe (4) is used to discharge the water after air float treatment, the residue discharge structure (5) is used to discharge the impurities air floated on the water surface; Two rotating rings (6) are rotatably arranged in the air float tank (1), the two rotating rings (6) are separately arranged at two ends of the air float tank (1), a supporting plate (7) is arranged between the two rotating rings (6), and a plurality of receiving hoppers (8) are arranged on the supporting plate (7). An annular groove (9) is formed in the end face of the air float tank (1) on the inner side of the rotating ring (6), the top of the annular groove (9) is provided with a horizontal part (10), two guide columns (11) are slidably arranged in the annular groove (9), and the two guide columns (11) are fixedly connected with the supporting plate (7). The annular groove (9) is coaxial with the air float tank (1). The bottom of the annular groove (9) is provided with an arc part (12), the height position gradually decreases from one end of the arc part (12) to the other end, and the center of the arc part (12) and the lowest point are on the same vertical line.

2. The rural livestock breeding wastewater air flotation treatment equipment of claim 1, characterized in that, A connecting shaft (13) is rotatably arranged on the rotating ring (6), a sliding groove plate (14) is fixedly connected to the connecting shaft (13), the supporting plate (7) is slidably arranged on the sliding groove plate (14) in the radial direction of the connecting shaft (13).

3. The rural livestock breeding wastewater air flotation treatment equipment of claim 2, characterized in that, A connecting rod (15) is connected between the two sliding groove plates (14), the connecting rod (15) is composed of an arc surface and an inclined surface, and the arc surface of the connecting rod (15) is tangent to the circumferential outer wall of the rotating ring (6).

4. The rural livestock breeding wastewater air flotation treatment equipment of claim 3, characterized in that, A vertical barrel (16) is communicated with the bottom of the air float tank (1), and the aeration valve (3) is arranged in the vertical barrel (16).

5. The rural livestock breeding wastewater air flotation treatment equipment of claim 4, characterized in that, The residue discharge structure (5) comprises a collecting groove (17) arranged on the arc outer wall of the air float tank (1), the collecting groove (17) is communicated with the inside of the air float tank (1), a discharge groove (18) is arranged on the outer side wall of the collecting groove (17), a first motor (19) is arranged on the collecting groove (17) to roll, a first rotating shaft (20) is arranged on the output end of the first motor (19), a plurality of fishing net plates (21) are arranged on the first rotating shaft (20), and a residue scraping plate (22) is transversely and slidably arranged on the discharge groove (18), and the residue scraping plate (22) is connected with the discharge groove (18) through a spring (23).

6. The rural livestock breeding wastewater air flotation treatment device according to claim 5, characterized in that, A second rotating shaft (24) is rotatably arranged on the air float tank (1), two transmission wheels (25) are arranged on the second rotating shaft (24), the two transmission wheels (25) are respectively in transmission connection with the two rotating rings (6), and a second motor (26) is arranged on the air float tank (1) to provide power for the second rotating shaft (24).

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