Sewage air floatation treatment device

Abstract

The application discloses a sewage air floatation treatment device, and relates to the technical field of sewage air floatation treatment, comprising a plurality of central symmetrical air guide fins, the air guide fin comprises two mirror image fixed spliced fins, the fin comprises a first air guide groove, a second air guide groove, a third air guide groove, a fourth air guide groove and a communication groove arranged on the same side; when the sewage air floatation treatment is carried out, the bubbles can be filled in the container in the horizontal direction, and the effect of high-efficiency sewage treatment is realized; the air floatation impurity removal treatment can be carried out on the sewage area below the air guide fin, the prior art cannot directly carry out the air floatation impurity removal treatment on the sewage area around or below the coil, and must rely on water flow circulation, and the sewage impurity removal efficiency of the application is high and the effect is good. In the process of sewage overflow discharge, the drainage hole can guide and collect the sewage near the water surface area from the edge to the center, and the discharge efficiency of impurities can be improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater flotation treatment technology, specifically a wastewater flotation treatment device. Background Technology

[0002] Existing wastewater flotation treatment equipment employs a single aeration device to generate bubbles from the bottom of the container, thereby carrying impurities upwards. This approach suffers from limited bubble coverage and relies on the flow characteristics of water to circulate and clean impurities, resulting in low wastewater treatment efficiency. To address this issue, existing technologies utilize a method of laying vortex or serpentine coils across the bottom of the container, with dense bubble outlets on these coils. This allows bubbles to fully cover the horizontal cross-section of the container, effectively improving wastewater treatment efficiency.

[0003] Chinese utility model patent CN213595926U discloses a wastewater flotation device, which includes a flotation tank. This wastewater flotation device features a sludge-discharging hopper with an open top and a conical bottom to prevent sludge from obstructing its upward movement. One side is also open to prevent sludge from being blocked during discharging. When sludge removal is needed, a servo motor starts, driving a screw to rotate. The screw drives a transmission rod to rise, which in turn pushes the sludge-discharging hopper upward. When the sludge is inside the hopper, two hydraulic push rods activate, driving a rubber ball upward until it blocks the water pipe, preventing leakage at the bottom of the hopper. At this point, the left servo motor continues to operate while the right servo motor stops, causing the sludge-discharging hopper to tilt and directly dump the sludge. Because the length and width of the sludge-discharging hopper are the same as those of the flotation tank, it can collect and discharge most of the sludge from the top of the flotation tank, achieving a sludge scraping function.

[0004] The aforementioned patent, based on a wastewater flotation treatment scheme, employs a scum-pouring hopper structure and a drive component to innovate the scum removal method. However, it does not explore a solution to improve the cleanliness of the treated water by ensuring the cleanliness of the container used in the wastewater flotation treatment. In existing technologies, the bottom of the container holding wastewater is prone to clumps of impurities depositing. Due to the characteristics of the wastewater, microorganisms are more likely to adhere to the inner wall, thus adsorbing impurities and reducing the cleanliness of the purified wastewater. The treatment effect on impurities in the wastewater is poor, so the inner wall of the container needs to be cleaned regularly. While cleaning microorganisms on the side walls of the container is relatively easy, the deposited impurities or microorganisms at the bottom of the container are difficult to maintain and clean due to the dense coils blocking them. Furthermore, when the bubble outlets of the coils become blocked, because there are many outlets and bubbles will preferentially flow out of the unblocked outlets, it is difficult to clear the blockage by high-pressure bubble impact, resulting in high maintenance difficulty. Therefore, there is an urgent need in this field for a wastewater flotation treatment device to solve the problems existing in the prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a technical solution for a wastewater flotation treatment device to solve the technical problem of poor treatment effect of impurities in wastewater in existing wastewater flotation treatment equipment.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wastewater flotation treatment device, comprising a container having a container sidewall and a container bottomwall, and an air bubble supply component located inside the container sidewall and close to the container bottomwall. The air bubble supply component includes a plurality of centrally symmetrical air guide fins. Each air guide fin includes two fins fixedly spliced ​​together in mirror image. Each fin includes a first air guide groove, a second air guide groove, a third air guide groove, a fourth air guide groove, and a connecting groove disposed on the same side. The first air guide grooves on the two fins are spliced ​​to form a first cavity, the second air guide grooves on the two fins are spliced ​​to form a second cavity, the third air guide grooves on the two fins are spliced ​​to form a third cavity, the fourth air guide grooves on the two fins are spliced ​​to form a fourth cavity, and the connecting grooves on the two fins are spliced ​​to form a connecting cavity. The first cavity, the second cavity, the third cavity, and the fourth cavity are interconnected through the connecting cavity. The end of the connecting cavity away from the second cavity is limitedly connected to the inner sidewall of the container sidewall.

[0007] The wastewater flotation treatment device also includes a diversion component, which comprises a diversion pipe vertically fixed to the center of the container sidewall. The top of the diversion pipe is sealed, and the bottom of the diversion pipe is connected to the water pump inlet. The water pump outlet is connected to the interior of the container sidewall via a pipe fitting. Several diversion holes are horizontally and centrally symmetrically arranged at the bottom of the diversion pipe sidewall. Preferably, a support frame is fixed to the lower end of the container bottom wall, and the water pump is installed within the support frame.

[0008] Using the above technical solution, the air guide fins are arranged in a circumferential array on the inner wall of the container. Air bubbles can be ejected from the first, second, third, and fourth chambers, and the distances from the ejection positions of the bubbles to the axis of the drainage pipe are all different. This allows for comprehensive bubble coverage of the container's interior and exterior. There are no obstructions above the central area of ​​the container's bottom wall, facilitating the cleaning of deposited impurities and microorganisms on the upper surface of the container's bottom wall during device maintenance. This allows for rinsing with a water gun or scrubbing with tools, improving the wastewater purification effect. This also facilitates wastewater flotation. During the treatment process, a water pump is simultaneously activated. The pump draws water from inside the drainage pipe and circulates it to the middle height of the container's side wall. In this process, water continuously flows into the drainage pipe from the drainage hole, which disturbs the water flow inside the container's side wall. This causes the water flow in the area at the same height as the drainage hole to tend to flow from the periphery to the center. This guides the bubbles produced by the air guide fins towards the center of the container, making up for the gap in bubble density in the center of the container. As a result, when this solution treats wastewater by air flotation, the bubbles can completely fill the container laterally, achieving high-efficiency wastewater treatment.

[0009] As a preferred embodiment, a sealing ring is fixedly connected to the end of the connecting cavity away from the second air guide groove. Alternatively, one fin is fixedly connected to the sealing ring, and two fins are fixedly connected using bolts. An air inlet pipe is horizontally connected through the center of the sealing ring, with one end of the air inlet pipe connecting to the connecting cavity. A support pipe is rotatably fitted onto the outer wall of the air inlet pipe away from the second air guide groove. The end of the support pipe away from the sealing ring is fixedly connected to the inner wall of the container sidewall. The end of the air inlet pipe away from the connecting cavity passes through the sidewall of the container and connects to an external air pump. The extension direction of the second cavity is the same as that of the air inlet pipe. The axes are parallel, allowing the first, third, and fourth cavities to eject bubbles obliquely downwards by rotating the adjusting fins. As a preferred embodiment, the end of the air intake pipe away from the connecting cavity is connected to an external motor drive shaft. The air intake pipe is connected to an external air pump using at least two connecting pipe fittings that can rotate coaxially with each other, so that the air intake pipe can achieve the function of rotation while maintaining the function of effectively obtaining gas from the air pump. The existing connection technology of the fittings is used here and will not be described in detail. As a preferred embodiment, all air intake pipes are connected to the same external air pump.

[0010] Using the above technical solution, the fins can rotate around the air inlet pipe axis. When device maintenance is required, the orientation of the first, third, and fourth cavities can be dynamically changed by cyclically driving the fins to rotate. This allows the upper surface of the container bottom wall to be cyclically impacted by water flow guided by air bubbles, and the impact direction has a dynamic changing effect, which is beneficial to improving the rinsing effect of the upper surface of the container bottom wall. After a short period of use of the device, this solution can be used for automated cleaning of the upper surface of the container bottom wall. By using relatively frequent automated light cleaning, the cleanliness of the container interior can be maintained, which can effectively extend the maintenance cycle that requires thorough cleaning of the container and effectively reduce the container maintenance cost.

[0011] As a preferred option, from a top-down perspective, the bubble outlets of the first, second, third, and fourth cavities are all oriented in a horizontal or downward direction based on a clockwise direction.

[0012] Using the above technical solution, the bubbles ejected from the air guide fins can generate vortexes to guide the water at the height of the air guide fins, making it easier for the bubbles attracted by the drainage holes to move towards the drainage pipe. By using the vortex to guide the bubbles towards the center, the lateral distribution efficiency of the bubbles can be improved, which in turn helps to improve the efficiency of wastewater flotation treatment.

[0013] As a preferred embodiment, the top of the side wall of the drainage pipe is horizontally and centrally symmetrically provided with several drainage holes. A sludge collection box is fixedly installed at the top of the drainage pipe. The upper surface of the side wall of the sludge collection box is located on the same horizontal plane. A drain pipe is fixedly connected to the bottom of one side wall of the sludge collection box. The end of the drain pipe away from the sludge collection box passes through the side wall of the container and connects to the outside.

[0014] Using the above technical solution, when using this device for wastewater flotation treatment, wastewater is continuously and slowly supplied to the side wall of the container until the water level reaches the middle height area, while clean water after flotation treatment is continuously pumped out from the bottom of the water level. The efficiency of supplying wastewater to the side wall of the container is greater than the efficiency of pumping clean water out from the side wall of the container. Impurities in the wastewater are carried to the water surface by air bubbles. Since the water level can be continuously higher than the top of the sludge collection box, the impurities on the water surface can carry a small amount of wastewater to overflow into the sludge collection box and then be discharged to the outside through the drain pipe. During the process of wastewater overflow discharge, the drainage hole can guide the wastewater near the water surface area from the edge to the center and collect it, so that the impurities on the water surface can also continuously collect towards the sludge collection box, improving the discharge efficiency of impurities.

[0015] As a preferred embodiment, the height of the end of the drain pipe furthest from the sludge collection box is lower than the height of the end of the drain pipe closest to the sludge collection box, thereby improving the efficiency of impurity discharge.

[0016] As a preferred embodiment, the middle part of the sidewall of the drainage tube is provided with several drainage holes in a horizontal and centrally symmetrical manner, so that the middle part of the sidewall of the container can also form a vortex tendency, which can provide an auxiliary effect on the vortex on the water surface and bottom, making it easier to form vortices on the water surface and bottom, enhancing the efficiency of the lateral distribution of bubbles on the bottom, and enhancing the efficiency of the collection of suspended impurities on the water surface towards the center.

[0017] As a preferred embodiment, the bottom end of the drainage pipe is fixedly connected to a support pipe. The bottom end of the support pipe penetrates downward through the center of the bottom wall of the container and is connected to the water pump inlet using a fitting. The connection between the support pipe and the bottom wall of the container is sealed, and the area of ​​the bottom wall of the container that is penetrated is a mounting hole.

[0018] As a preferred embodiment, the axis of the drainage hole is offset from the axis of the drainage pipe, so that water in the vortex state can easily flow into the interior of the drainage pipe through the drainage hole.

[0019] As a preferred solution, the water pump outlet is connected to the middle height position inside the container side wall using a pipe fitting, so as to avoid interfering with the generation of vortices in the upper and lower parts of the container side wall.

[0020] As a preferred option, from a top-down perspective, the connecting channel is trapezoidal in shape, with the upper base of the trapezoid close to the air inlet pipe and the lower base far from the air inlet pipe. This allows the gas to flow radially within the connecting channel, and when the gas further flows into the air guide channel, the flow process does not have the defect of large flow resistance caused by large-angle bends, thus ensuring smooth flow.

[0021] As a preferred option, coagulants and / or flocculants are added to the wastewater to further improve the efficiency of wastewater flotation treatment.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. This invention features air guide fins capable of ejecting bubbles at varying distances from the drainage pipe. This design allows for comprehensive bubble coverage of the container's interior periphery, creating an unobstructed area above the central region of the container's bottom wall. This facilitates the cleaning of deposited impurities and microorganisms on the container's bottom surface during device maintenance, thereby improving wastewater purification efficiency. During wastewater flotation treatment, the continuous flow of water into the drainage pipe from the drainage holes disturbs the water flow within the container's sidewalls. This causes the water flow at the same height as the drainage holes to tend to flow from the periphery towards the center, guiding the bubbles produced by the air guide fins towards the center of the container. This compensates for the low bubble density in the central part of the container, ensuring that the bubbles can completely fill the container laterally during wastewater flotation treatment, achieving highly efficient wastewater treatment.

[0024] 2. When device maintenance is required, this invention can dynamically change the orientation of the first, third, and fourth cavities by cyclically driving the fins to rotate. This allows the upper surface of the container bottom wall to be cyclically impacted by water flow guided by densely ejected bubbles, and the impact direction has a dynamic changing effect, which is beneficial to improving the rinsing effect of the upper surface of the container bottom wall. After a short period of use of the device, this solution can be used for automated cleaning of the upper surface of the container bottom wall. By using more frequent automated light cleaning, the cleanliness of the container interior can be maintained, which can effectively extend the maintenance cycle that requires thorough cleaning of the container and effectively reduce the container maintenance cost.

[0025] 3. From a top-down perspective, all bubble outlets of this invention face either a horizontal or downward direction, based on a clockwise rotation. The bubbles ejected from the air guide fins create vortices that guide the water at the height of the air guide fins, making it easier for the bubbles attracted by the drainage holes to move towards the drainage pipe. Utilizing the central guiding effect of the vortex, the lateral coverage efficiency of the bubbles can be improved, thereby enhancing the efficiency of wastewater flotation treatment. Furthermore, the downward-facing bubble injection scheme can perform flotation to remove impurities from the wastewater area below the air guide fins. Existing technologies cannot directly perform flotation to remove impurities from the wastewater area around or below the coil and must rely on water circulation. This solution offers high efficiency and effectiveness in removing impurities from wastewater.

[0026] 4. During the sewage overflow discharge process, the drainage hole can guide the sewage near the water surface area from the edge to the center and collect it, so that impurities on the water surface can also continuously collect towards the collection box. There is no need to set up a scraper to collect impurities on the water surface, thus improving the discharge efficiency of impurities.

[0027] 5. In this invention, the gas flows radially within the connecting groove. When the gas further flows into the gas guide groove, the flow process does not have the defect of large flow resistance caused by large-angle bends, which can ensure smooth flow.

[0028] 6. When the air guide fin is damaged, this invention only requires replacing the damaged air guide fin, which is much cheaper than the existing technology that requires replacing the entire coil.

[0029] 7. When the air guide fin of this invention becomes blocked, the blockage can be cleared by increasing the internal air pressure of the air guide fin, or the blockage can be manually cleared by easily disassembling the fin, making it more practical. Attached Figure Description

[0030] Figure 1 This is a top oblique view of the overall structure of the wastewater flotation treatment device of the present invention;

[0031] Figure 2 This is a schematic front view of the overall structure of the wastewater flotation treatment device of the present invention;

[0032] Figure 3 This is a top-view oblique view of the overall structure of the wastewater flotation treatment device of the present invention;

[0033] Figure 4 This is a schematic diagram of the internal structure of the wastewater flotation treatment device of the present invention when the air guide fins are oriented horizontally.

[0034] Figure 5 This is a schematic diagram of the internal structure of the wastewater flotation treatment device of the present invention when the air guide fins are tilted downwards.

[0035] Figure 6 for Figure 4 Top view;

[0036] Figure 7 This is a top view of a horizontal cross-section near the drainage hole area of ​​the wastewater flotation treatment device of the present invention;

[0037] Figure 8 for Figure 7 Enlarged view of region A in the middle;

[0038] Figure 9 This is a schematic diagram of the air guide fin structure of the wastewater flotation treatment device of the present invention;

[0039] Figure 10 This is a schematic diagram of the exploded structure of the air guide fin of the wastewater flotation treatment device of the present invention.

[0040] Labels in the diagram: 101, Container sidewall; 102, Container bottomwall; 103, Support frame; 200, Air guide fin; 201, Fin; 202, Air inlet pipe; 203, Sealing ring; 204, Bearing pipe; 211, First air guide groove; 212, Second air guide groove; 213, Third air guide groove; 214, Fourth air guide groove; 215, Connecting groove; 221, First cavity; 222, Second cavity; 223, Third cavity; 224, Fourth cavity; 301, Drainage pipe; 302, Support pipe; 303, Mounting hole; 304, Drainage hole; 305, Water pump; 401, Sludge collection box; 402, Sludge discharge pipe. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Example: Figures 1-6 , Figures 9-10 As shown, the wastewater flotation treatment device of the present invention includes a container with a container sidewall 101 and a container bottom wall 102, and an air bubble supply component located inside the container sidewall 101 and close to the container bottom wall 102. The air bubble supply component includes a plurality of centrally symmetrical air guide fins 200. Each air guide fin 200 includes two fins 201 that are mirror-fixed and spliced ​​together. Each fin 201 includes a first air guide groove 211, a second air guide groove 212, a third air guide groove 213, a fourth air guide groove 214, and a connecting groove 215 disposed on the same side. The first air guide grooves 211 on the two fins 201 are spliced ​​together to form The first cavity 221 is formed by splicing the second air guide grooves 212 on the two fins 201, forming the second cavity 222; the third air guide grooves 213 on the two fins 201 are spliced ​​to form the third cavity 223; the fourth air guide grooves 214 on the two fins 201 are spliced ​​to form the fourth cavity 224; and the connecting grooves 215 on the two fins 201 are spliced ​​to form a connecting cavity. The first cavity 221, the second cavity 222, the third cavity 223, and the fourth cavity 224 can be interconnected through the connecting cavity. The end of the connecting cavity away from the second cavity 222 is limited and connected to the inner sidewall of the container sidewall 101.

[0043] The wastewater flotation treatment device also includes a diversion component, which includes a diversion pipe 301 vertically fixed to the center of the container side wall 101. The top of the diversion pipe 301 is sealed, and the bottom of the diversion pipe 301 is connected to the inlet of the water pump 305. The outlet of the water pump 305 is connected to the inside of the container side wall 101 via a pipe fitting. At the bottom of the side wall of the diversion pipe 301, several diversion holes 304 are horizontally and centrally symmetrically opened. A support frame 103 is fixedly connected to the lower end of the container bottom wall 102, and the water pump 305 is installed in the support frame 103.

[0044] Using the above technical solution, the air guide fins 200 are arranged in a circumferential array on the inner wall of the container sidewall 101. The first cavity 221, second cavity 222, third cavity 223, and fourth cavity 224 can all eject air bubbles, and the distances of the ejected bubbles from the axis of the drain pipe 301 are all different, enabling comprehensive bubble coverage of the container's interior and exterior. There are no obstructions above the central area of ​​the container bottom wall 102, facilitating the cleaning of deposited impurities and microorganisms on the upper surface of the container bottom wall 102 during device maintenance, thus improving the wastewater purification effect. During the wastewater flotation treatment process, simultaneously... When the water pump 305 is started, it draws water out of the inside of the diversion pipe 301 and circulates it to the middle height position inside the container side wall 101. During this process, water continuously enters the inside of the diversion pipe 301 from the diversion hole 304, which can disturb the water flow inside the container side wall 101. This causes the water flow in the same height area as the diversion hole 304 to have a tendency to flow from the periphery to the center. This guides the bubbles produced by the air guide fin 200 towards the center of the container, making up for the gap in the low bubble density in the middle of the container. This allows the bubbles to fill the container horizontally and completely when the wastewater is treated by air flotation, achieving high-efficiency wastewater treatment.

[0045] A sealing ring 203 is sealed and fixed to the end of the connecting cavity away from the second air guide groove 212. One fin 201 is fixed to the sealing ring 203, and two fins 201 are fixed together by bolts. An air inlet pipe 202 is horizontally fixed through the center of the sealing ring 203. One end of the air inlet pipe 202 is connected to the connecting cavity. A support pipe 204 is rotatably sleeved on the outer wall of the air inlet pipe 202 away from the second air guide groove 212. The end of the support pipe 204 away from the sealing ring 203 is fixed to the inner wall of the container side wall 101. The end of the air inlet pipe 202 away from the connecting cavity passes through the side wall of the container side wall 101 and is connected to an external air pump. The extension direction of the second cavity 222 is parallel to the axis of the air inlet pipe 202. This allows the first cavity 221, the third cavity 223, and the fourth cavity 224 to spray bubbles obliquely downward by rotating and adjusting the fin 201. An external motor drive shaft is connected to the end of the air inlet pipe 202 away from the connecting cavity.

[0046] Using the above technical solution, the fins 201 can rotate around the axis of the air inlet pipe 202. When device maintenance is required, the orientation of the first cavity 221, the third cavity 223, and the fourth cavity 224 can be dynamically changed by cyclically driving the fins 201 to rotate. This allows the upper surface of the container bottom wall 102 to be cyclically impacted by water flow guided by air bubbles, and the impact direction has a dynamic changing effect, which is beneficial to improving the rinsing effect of the upper surface of the container bottom wall 102. After a short period of use of the device, this solution can be used for automated cleaning of the upper surface of the container bottom wall 102. By using relatively frequent automated light cleaning, the cleanliness of the container interior can be maintained, which can effectively extend the maintenance cycle that requires thorough cleaning of the container and effectively reduce the container maintenance cost.

[0047] From a top-down perspective, the bubble outlets of the first cavity 221, the second cavity 222, the third cavity 223, and the fourth cavity 224 all face a downward direction based on a clockwise direction; in another embodiment, the bubble outlets of the first cavity 221, the second cavity 222, the third cavity 223, and the fourth cavity 224 all face a horizontal direction based on a clockwise direction.

[0048] Using the above technical solution, the bubbles ejected from the air guide fin 200 can generate vortex guidance for the water at the height of the air guide fin 200, making it easier for the bubbles attracted by the drainage hole 304 to move towards the drainage pipe 301. By using the vortex to guide the bubbles towards the center, the lateral coverage efficiency of the bubbles can be improved, which in turn helps to improve the efficiency of wastewater flotation treatment.

[0049] The top of the side wall of the drainage pipe 301 is horizontally and centrally symmetrically provided with several drainage holes 304. A sludge collection box 401 is fixedly installed at the top of the drainage pipe 301. The upper surface of the side wall of the sludge collection box 401 is located on the same horizontal plane. A drain pipe 402 is fixedly connected to the bottom of one side wall of the sludge collection box 401. The end of the drain pipe 402 away from the sludge collection box 401 passes through the side wall 101 of the container and connects to the outside.

[0050] Using the above technical solution, when using this device for air flotation treatment of sewage, sewage is continuously and slowly supplied into the container side wall 101 to the middle water level area, and clean water after air flotation treatment is continuously pumped out from the bottom of the water level. The efficiency of sewage supply into the container side wall 101 is greater than the efficiency of clean water pumped out from the container side wall 101. Impurities in the sewage are carried to the water surface by air bubbles. Since the water level can be continuously higher than the top of the sludge collection box 401, the impurities on the water surface can carry a small amount of sewage to overflow into the sludge collection box 401, and then be discharged to the outside through the sewage pipe 402. During the sewage overflow discharge process, the drainage hole 304 can guide the sewage near the water surface area from the edge to the center to collect, so that the impurities on the water surface can also continuously collect towards the sludge collection box 401, improving the discharge efficiency of impurities.

[0051] The height of the end of the drain pipe 402 away from the sludge collection box 401 is lower than the height of the end of the drain pipe 402 near the sludge collection box 401, thereby improving the efficiency of impurity discharge.

[0052] The bottom end of the drainage pipe 301 is fixedly connected to the support pipe 302. The bottom end of the support pipe 302 penetrates downward through the center of the bottom wall 102 of the container and is connected to the water inlet of the water pump 305 through the pipe fitting. The connection between the support pipe 302 and the bottom wall 102 of the container is sealed. The area of ​​the bottom wall 102 of the container that is penetrated is the mounting hole 303.

[0053] like Figures 7-8 As shown, the axis of the drainage hole 304 is offset from the axis of the drainage pipe 301, so that water in the vortex state can easily flow into the interior of the drainage pipe 301 through the drainage hole 304.

[0054] The outlet of the water pump 305 is connected to the middle height position inside the container side wall 101 by means of a pipe fitting, so as to avoid interfering with the generation of eddies in the upper and lower parts of the container side wall 101.

[0055] From a top-down perspective, the connecting groove 215 is trapezoidal in shape, with the upper base of the trapezoid close to the air inlet pipe 202 and the lower base far from the air inlet pipe 202. This allows the gas to flow radially within the connecting groove 215. When the gas further flows into the air guide groove, the flow process does not have the defect of large flow resistance caused by large-angle bends, which can ensure smooth flow.

[0056] In another embodiment of the present invention, a plurality of drainage holes 304 are horizontally and centrally symmetrically provided in the middle of the side wall of the drainage pipe 301, so that the middle height of the side wall 101 of the container can also form a vortex tendency, which can provide an auxiliary effect on the vortex of the water surface and the bottom, making it easier to form the vortex of the water surface and the bottom, enhancing the efficiency of the lateral distribution of bubbles at the bottom of the water, and enhancing the efficiency of the collection of suspended impurities on the water surface towards the center.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A wastewater flotation treatment device, comprising a container having a container sidewall (101) and a container bottom wall (102), and an air bubble supply component located inside the container sidewall (101) and close to the container bottom wall (102), characterized in that: The bubble supply component includes several centrally symmetrical air guide fins (200). Each air guide fin (200) includes two mirror-image fixedly spliced ​​fins (201). Each fin (201) includes a first air guide groove (211), a second air guide groove (212), a third air guide groove (213), a fourth air guide groove (214), and a connecting groove (215) located on the same side. The first air guide grooves (211) on the two fins (201) are spliced ​​to form a first cavity (221), and the second air guide grooves (212) on the two fins (201) are spliced ​​to form a second cavity (221). 2) The third air guide groove (213) on the two fins (201) are spliced ​​to form the third cavity (223), the fourth air guide groove (214) on the two fins (201) are spliced ​​to form the fourth cavity (224), and the connecting groove (215) on the two fins (201) are spliced ​​to form the connecting cavity. The first cavity (221), the second cavity (222), the third cavity (223), and the fourth cavity (224) can be interconnected through the connecting cavity. The end of the connecting cavity away from the second cavity (222) is limited and connected to the inner sidewall of the container sidewall (101). The wastewater flotation treatment device also includes a diversion component, which includes a diversion pipe (301) vertically fixed in the center of the container sidewall (101). The top of the diversion pipe (301) is sealed, and the bottom of the diversion pipe (301) is connected to the inlet of the water pump (305). The outlet of the water pump (305) is connected to the inside of the container sidewall (101) via a pipe fitting. At the bottom of the sidewall of the diversion pipe (301), several diversion holes (304) are horizontally and centrally symmetrically opened. A sealing ring (203) is sealed and fixed to the end of the connecting cavity away from the second air guide groove (212). An air inlet pipe (202) is horizontally fixed through the center of the sealing ring (203). One end is connected to the connecting cavity. The outer wall of the air inlet pipe (202) away from the second air guide groove (212) is rotatably fitted with a support pipe (204). The end of the support pipe (204) away from the sealing ring (203) is fixed to the inner wall of the container side wall (101). The end of the air inlet pipe (202) away from the connecting cavity passes through the side wall of the container side wall (101) and is connected to an external air pump. The channel extension direction of the second cavity (222) is parallel to the axis of the air inlet pipe (202). This allows the first cavity (221), the third cavity (223), and the fourth cavity (224) to have the function of spraying bubbles obliquely downward by rotating the adjustment fin (201).

2. The wastewater flotation treatment device according to claim 1, characterized in that: From a top-down perspective, the bubble outlets of the first cavity (221), the second cavity (222), the third cavity (223), and the fourth cavity (224) all face a horizontal or downward direction based on a clockwise direction.

3. The wastewater flotation treatment device according to claim 1, characterized in that: The top of the side wall of the drainage pipe (301) is horizontally and centrally symmetrically provided with several drainage holes (304). A sludge collection box (401) is fixedly installed at the top of the drainage pipe (301). The upper surface of the side wall of the sludge collection box (401) is located on the same horizontal plane. A drain pipe (402) is fixedly connected to the bottom of one side wall of the sludge collection box (401). The end of the drain pipe (402) away from the sludge collection box (401) passes through the side wall (101) of the container and connects to the outside.

4. The wastewater flotation treatment device according to claim 3, characterized in that: The height of the end of the drain pipe (402) away from the sludge collection box (401) is lower than the height of the end of the drain pipe (402) close to the sludge collection box (401).

5. The wastewater flotation treatment device according to claim 1, characterized in that: The middle part of the side wall of the drainage tube (301) has several drainage holes (304) that are horizontal and centrally symmetrical.

6. The wastewater flotation treatment device according to claim 1, characterized in that: The bottom end of the drainage pipe (301) is fixedly connected to the support pipe (302). The bottom end of the support pipe (302) passes through the center of the bottom wall (102) of the container and is connected to the water inlet of the water pump (305) by means of a fitting.

7. A wastewater flotation treatment device according to any one of claims 1, 3, and 5, characterized in that: The axis of the drainage hole (304) is offset from the axis of the drainage tube (301).

8. A wastewater flotation treatment device according to claim 1, characterized in that: The outlet of the water pump (305) is connected to the middle height position inside the side wall (101) of the container by means of a pipe fitting.

9. A wastewater flotation treatment device according to claim 1, characterized in that: From a top-down perspective, the connecting groove (215) is trapezoidal in shape, with the upper base of the trapezoid close to the air intake pipe (202) and the lower base far away from the air intake pipe (202).

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