A new type of sewage treatment air flotation equipment and method thereof

Abstract

The application relates to the field of air flotation equipment, and discloses a novel sewage treatment air flotation equipment and a method thereof. The novel sewage treatment air flotation equipment comprises an air flotation machine main body, the air flotation machine main body is sequentially provided with an aeration area, an air flotation area and a discharge treatment area from one side to the other side, a slag scraper is arranged at the air flotation area, a right-angle plate is installed at the discharge treatment area, the right-angle plate and one side of the discharge treatment area form a filtering area, and an inclined plate which is arranged in an inclined mode is installed in the filtering area. The floating action mechanism with the same magnetic part and the one-way scraping mechanism are arranged, the magnetic repulsion force is automatically scraped to remove impurities on the filter cloth by using the liquid surface rising, the cleaning is triggered before each filtration, the problem of flux decline caused by filter cloth blockage is relieved, the recovery member and multiple sets of blocking mechanisms are arranged, the scraper is deflected to pass over the impurities and vibrates to be self-cleaned when returning, and the impurities are avoided from being reversely taken; in addition, the magnetic field can change the crystallization form of calcium and magnesium ions, reduce the internal precipitation of the equipment, and prolong the cleaning period.

Description

Technical Field

[0001] This invention relates to the field of flotation equipment technology, and more specifically, to a novel flotation equipment and method for wastewater treatment. Background Technology

[0002] Wastewater treatment flotation equipment is a solid-liquid separation device that utilizes microbubbles to adhere suspended solids, grease, colloids, and other impurities in water. These impurities are then buoyed to the surface to form a scum layer, which is then removed by a scraping system. Its core technology lies in generating 10-100 μm microbubbles through dissolved air release, vortex aeration, or electrolytic gas generation, significantly reducing the apparent density of pollutants and achieving efficient separation. This technology is widely used in the pretreatment or advanced treatment of oily wastewater, papermaking and dyeing wastewater, and municipal sewage. It features fast separation speed, small footprint, low sludge moisture content, and strong adaptability, making it an important physical treatment method besides gravity sedimentation.

[0003] Existing wastewater treatment flotation equipment typically uses multiple layers of filter cloth for final filtration after flotation separation, with the filtered clean water being discharged. However, during long-term operation, impurities continuously trap and accumulate on the water-facing filter surface of the filter cloth. Large particles of impurities gradually form a clogging layer, leading to increased water resistance (the mesh on the water-facing surface is blocked, affecting the passage of subsequent water) and decreased flow rate. Ultimately, this causes a continuous decline in filtration efficiency, requiring frequent cleaning or replacement of the filter cloth to maintain treatment efficiency. Summary of the Invention

[0004] This invention provides a novel air flotation device and method for wastewater treatment, solving the technical problem in related technologies where clogging of the water-facing filter surface affects subsequent filtration.

[0005] This invention provides a novel wastewater treatment flotation device, including a flotation machine body. The flotation machine body is provided with an aeration area, a flotation area and a discharge treatment area from one side to the other. A sludge scraper is provided in the flotation area and a right-angle plate is installed in the discharge treatment area. The right-angle plate and one side of the discharge treatment area form a filtration area. An inclined plate is installed in the filtration area, and multiple layers of filter cloth are laid on the inclined plate, with the pore size of each layer of filter cloth gradually decreasing from top to bottom; The filtration area is also equipped with a one-way scraping mechanism for scraping off impurities from the inclined plate; A floating mechanism is provided on the right-angle plate; Both the floating mechanism and the unidirectional scraping mechanism have magnetic parts, and the two magnetic parts have the same magnetism; The floating mechanism is configured to rotate and rise when the liquid level rises, so that its magnetic part corresponds to the magnetic part of the one-way scraping mechanism. The magnetic repulsion force drives the one-way scraping mechanism to slide along the inclined direction of the inclined plate to clean the filter cloth before filtration.

[0006] As a further optimization of the present invention, a guide component is also provided in the filtering area. The guide component includes a guide rod arranged parallel to the inclined plate, a sliding frame slidably sleeved on the guide rod, and a return spring movably sleeved on the guide rod. One end of the return spring is fixedly connected to the sliding frame, and the other end is fixedly connected to the guide rod. The one-way scraping mechanism is connected to the sliding frame. When the one-way scraping mechanism moves along the guide rod, the return spring is compressed by the sliding frame.

[0007] As a further optimization of the present invention, the one-way scraping mechanism includes a connecting plate, a scraper, and a magnetic component as a magnetic part. The connecting plate is fixedly installed at the bottom of the slide frame, and the magnetic component is embedded in the connecting plate. The scraper is rotatably connected to the connecting plate via a hinge. The one-way scraping mechanism also includes a return component disposed on the moving side of the scraper. The return component includes an arc-shaped tube, a return spring, and an arc-shaped rod. One end of the arc-shaped tube is fixedly installed on the connecting plate, and the other end is slidably inserted into the arc-shaped rod. The return spring is disposed inside the arc-shaped tube, with one end connected to the connecting plate and the other end connected to the arc-shaped rod. The end of the arc-shaped rod away from the arc-shaped tube is fixedly connected to the scraper, so that the scraper can be deflected by compressing the return spring when it moves back.

[0008] As a further optimization of the present invention, the floating mechanism includes a float, a rotating rod, and a second magnetic component as a magnetic part. The float is a float box structure and is rotatably connected to a right-angle plate through the rotating rod and a damping shaft. The second magnetic component is fixedly installed on the float and is used to be positioned opposite to and magnetically correspond to the first magnetic component when the float rotates and rises to a set position as the liquid level rises.

[0009] As a further optimization of the present invention, the guide rod is also provided with a positioning element, and the top of the slide frame is provided with an opening to accommodate sliding on the guide rod without being blocked by the positioning element; in the initial state, the output end of the positioning element passes through the guide rod, the slide frame and the connecting plate, and extends into the interior of the scraper to prevent the scraper from moving and deflecting; when the magnetic part of the floating mechanism corresponds magnetically with the magnetic element, the output end of the positioning element exits the scraper, the slide frame and the guide rod, releasing the limitation on the position of the scraper.

[0010] As a further optimization of the present invention, a filter screen is provided at the end area of ​​the inclined plate for receiving impurities scraped by the one-way scraping mechanism. The main body of the air flotation machine is provided with a discharge valve that communicates with the filtration area. The inlet of the discharge valve is located below the inclined plate for discharging the clean water filtered by the filter cloth.

[0011] As a further optimization of the present invention, multiple sets of blocking mechanisms are provided along the moving path of the unidirectional scraping mechanism in the discharge treatment area. The blocking mechanism includes a T-shaped rod and a return spring. The insertion end of the T-shaped rod slides through the air flotation machine body and extends into the filtration area. The return spring connects the T-shaped rod and the air flotation machine body. The insertion end of the T-shaped rod is V-shaped, which is used to apply force to the scraper when the scraper moves back, so that it rotates around the hinge and compresses the return component. At the same time, the scraper vibrates due to the sequential contact of multiple sets of blocking mechanisms, so as to perform self-cleaning of the scraper.

[0012] As a further optimization of the present invention, both magnetic component one and magnetic component two are permanent magnets, and they are arranged with the same pole facing each other to generate a repulsive magnetic force.

[0013] As a further optimization of the present invention, the filter cloth is laid in three or more layers, and the pore size of each layer of filter cloth decreases from top to bottom.

[0014] A novel wastewater treatment flotation method, employing the aforementioned novel wastewater treatment flotation equipment, includes the following steps: The wastewater to be treated is sequentially fed into the aeration zone and the flotation zone for flotation separation. The water after air flotation separation enters the filtration area of ​​the discharge treatment zone, where it is filtered layer by layer through multiple layers of filter cloth on the inclined plate. The filtered clean water is then discharged through the discharge valve. As filtration proceeds, impurities gradually accumulate on the filter cloth, and the liquid level in the discharge treatment area gradually rises. The liquid level pushes the float to drive the rotating rod and magnetic component two to rotate and rise. When the second magnetic component rotates to a position opposite to the first magnetic component on the one-way scraping mechanism and with the same pole, the output end of the positioning component retracts, releasing the limit. At the same time, the magnetic repulsion force drives the one-way scraping mechanism to slide along the guide rod and the inclined plate, and the scraper scrapes off and pushes the impurities accumulated on the filter cloth. As the scraper unlocks and scrapes, the liquid to be filtered gradually follows the scraper to the filter cloth for filtration. As filtration continues, the liquid level drops at the discharge treatment area, causing the float to fall back and drive the magnetic component two away from its corresponding position. The one-way scraping mechanism slides back to its original position under the restoring force of the return spring. During the reset process, the V-shaped insertion end of the blocking mechanism acts on the scraper in sequence, causing the scraper to deflect around the hinge as an axis, preventing impurities from being scraped back. At the same time, vibration is generated to clean the scraper itself.

[0015] The beneficial effects of this invention are as follows: 1. The novel wastewater treatment flotation device of the present invention is equipped with a floating mechanism and a one-way scraping mechanism, both of which have magnetic parts with the same magnetism. The floating mechanism is driven to rotate by the rise of the liquid level, so that the two magnetic parts correspond and generate magnetic repulsion. This automatically drives the one-way scraping mechanism to slide along the inclined plate to scrape and clean the impurities accumulated on the filter cloth. The cleaning action is triggered before each filtration, which reduces the problem of decreased filtration throughput caused by filter cloth blockage.

[0016] 2. The novel wastewater treatment flotation device of the present invention, by setting a return component and setting multiple sets of blocking mechanisms in the discharge treatment area, allows the scraper to deflect under the action of the V-shaped insertion end during the return movement of the unidirectional scraping mechanism after the magnetic repulsion disappears, thereby passing over the impurities and avoiding the backflow of impurities that have been scraped to the filter screen back into the filtration area. At the same time, the sequential contact of multiple sets of blocking mechanisms causes the scraper to vibrate multiple times, effectively shaking off the residual impurities attached to the scraper, realizing the self-cleaning function of the scraper and improving the long-term stable operation of the equipment.

[0017] 3. In the novel wastewater treatment flotation equipment described in this invention, the magnetic components one and two generate a magnetic field that can affect the crystallization behavior of scale-forming ions such as calcium and magnesium in the water, causing calcium carbonate to change from a hard, easily adhered calcite form to a softer, less adhered aragonite form, thereby reducing sedimentation at the inclined plate and in the area above the discharge treatment zone. This is beneficial for subsequent filtration and equipment maintenance, and extends the equipment cleaning cycle. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a novel wastewater treatment flotation device proposed in this invention.

[0019] Figure 2 This is a partial structural schematic diagram of a novel wastewater treatment flotation device proposed in this invention.

[0020] Figure 3 This is a schematic diagram of the filtration area in a novel wastewater treatment flotation device proposed in this invention.

[0021] Figure 4 This is a schematic diagram of the scraper structure in a novel wastewater treatment flotation device proposed in this invention.

[0022] Figure 5 This is a schematic diagram of the discharge treatment area in a novel wastewater treatment flotation device proposed in this invention.

[0023] Figure 6 for Figure 1 A magnified structural diagram at point A in the diagram.

[0024] In the picture: 1. Main body of the dissolved air flotation unit; 101. Aeration zone; 102. Discharge and treatment zone; 103. Discharge and treatment zone; 2. Right angle plate; 3. Inclined plate; 31. Filter cloth; 32. Filter screen; 4. Guide component; 41. Guide rod; 42. Slide frame; 43. Return spring; 5. One-way scraping mechanism; 51. Connecting plate; 52. Scraper; 53. Magnetic component one; 54. Arc-shaped tube; 55. Return spring; 56. Arc-shaped rod; 6. Floating mechanism; 61. Float; 62. Rotating rod; 63. Magnetic component two; 7. Positioning components; 8. Blocking mechanism; 81. T-shaped rod; 82. Return spring; 9. Discharge valve. Detailed Implementation

[0025] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0026] Example 1 like Figures 1 to 6 As shown in the figure, this embodiment of the invention provides a novel wastewater treatment flotation device, including a flotation machine body 1. The flotation machine body 1 is provided with an aeration zone 101, a flotation zone 102, and a discharge treatment zone 103 sequentially from one side to the other. A scum scraper is provided in the flotation zone 102 for scraping off the scum layer generated by flotation.

[0027] In one specific implementation, a right-angle plate 2 is installed at the discharge treatment area 103, and the right-angle plate 2 and one side wall of the discharge treatment area 103 together form a filtration area. This filtration area is used for the final filtration of water after air flotation treatment.

[0028] In a preferred embodiment, an inclined plate 3 is installed in the filtration area. The inclination angle of the inclined plate 3 can be adjusted according to the actual water quality and treatment capacity, for example, set to 15° to 45°. Multiple layers of filter cloth 31 are laid on the inclined plate 3, and the pore size of each layer of filter cloth gradually decreases from top to bottom. For example, the top layer of filter cloth can be a 100-mesh filter cloth, the middle layer can be a 200-mesh filter cloth, and the bottom layer can be a 300-mesh filter cloth to achieve progressive fine filtration. A filter screen 32 is provided at the end area of ​​the inclined plate 3 (i.e., at the lower end of the inclination) to collect the scraped impurities.

[0029] In a more preferred embodiment, the filter cloth 31 is laid in three or more layers, and the pore size of each layer of filter cloth decreases from top to bottom to ensure filtration accuracy and prevent excessive clogging.

[0030] like Figure 4 and Figure 5 As shown, a one-way scraping mechanism 5 for scraping impurities on the inclined plate 3 is also provided in the filtration area. The one-way scraping mechanism 5 is configured to scrape impurities on the surface of the filter cloth 31 only in one direction of movement (i.e., the forward scraping direction), while avoiding bringing the scraped impurities back in the return direction.

[0031] As a specific implementation method, such as Figures 1 to 5 As shown, a guide 4 is also provided in the filtering area to guide the movement trajectory of the one-way scraping mechanism 5. The guide 4 includes a guide rod 41 arranged parallel to the inclined plate 3, a sliding frame 42 slidably sleeved on the guide rod 41, and a return spring 43 movably sleeved on the guide rod 41. One end of the return spring 43 is fixedly connected to the sliding frame 42, and the other end is fixedly connected to the guide rod 41. The one-way scraping mechanism 5 is fixedly connected to the sliding frame 42, so that when the one-way scraping mechanism 5 moves along the guide rod 41, the sliding frame 42 will correspondingly compress the return spring 43, storing elastic potential energy for subsequent reset.

[0032] As a preferred embodiment, such as Figures 4 to 6 As shown, the unidirectional scraping mechanism 5 includes a connecting plate 51, a scraper 52, and a magnetic component 53. The connecting plate 51 is fixedly installed at the bottom of the slide frame 42. The magnetic component 53, serving as the magnetic part of the mechanism, is preferably a permanent magnet and is embedded or fixedly installed on the connecting plate 51. The scraper 52 is rotatably connected to the connecting plate 51 via a hinge, allowing the scraper 52 to deflect upwards relative to the connecting plate 51 within a certain angle range.

[0033] Furthermore, in order to automatically deflect and lift when the scraper 52 returns, the one-way scraping mechanism 5 also includes a return member disposed on the moving side of the scraper 52. As a specific implementation, such as... Figure 4As shown, the return mechanism includes an arc-shaped tube 54, a return spring 55, and an arc-shaped rod 56. One end of the arc-shaped tube 54 is fixedly mounted on the connecting plate 51, and its inner cavity is arc-shaped. One end of the arc-shaped rod 56 slides into the arc-shaped tube 54, and the other end is fixedly connected to the scraper 52. The return spring 55 is located inside the arc-shaped tube 54, with one end connected to the connecting plate 51 and the other end connected to the arc-shaped rod 56. When the scraper 52 is forced to deflect by an external force, the arc-shaped rod 56 will compress the return spring 55; after the external force disappears, the return spring 55 drives the scraper 52 to return to its working angle.

[0034] like Figure 2 and Figure 5 As shown, a floating mechanism 6 is provided on the right-angle plate 2. The floating mechanism 6 serves as the trigger element for the entire automatic cleaning process. Both the floating mechanism 6 and the unidirectional scraping mechanism 5 have magnetic parts, and the two magnetic parts have the same magnetism (for example, both are N poles or both are S poles), thereby generating mutually repulsive magnetic forces.

[0035] In one specific implementation, the floating mechanism 6 includes a float 61, a rotating rod 62, and a second magnetic component 63. The float 61 is preferably a float box structure, and it is rotatably connected to the right-angle plate 2 via the rotating rod 62 and a damping shaft. The second magnetic component 63, serving as the magnetic part of the mechanism, preferably uses a permanent magnet of the same type as the first magnetic component 53, and is fixedly installed on the float 61. As the liquid level in the filtration area gradually rises, the float 61 is subjected to buoyancy and floats upward, causing the rotating rod 62 and the second magnetic component 63 to rotate and rise around the damping shaft.

[0036] In a more preferred embodiment, when the float 61 rises to a set position as the liquid level rises, the second magnetic element 63 is exactly opposite to the first magnetic element 53 and has the same pole, so as to drive the unidirectional scraping mechanism 5 to move.

[0037] To prevent the unidirectional scraping mechanism 5 from moving unexpectedly when not in operation or the scraper 52 from deflecting unexpectedly, this embodiment also includes a positioning element 7. As a specific implementation method, such as... Figure 5 As shown, the positioning element 7 is mounted on the guide rod 41, and it can be one of a hydraulic cylinder, a pneumatic cylinder, or an electric push rod. An opening is provided at the top of the sliding frame 42 so that the sliding frame 42 can slide on the guide rod 41 without being obstructed by the positioning element 7. In the initial state (i.e., before cleaning is triggered), the output end of the positioning element 7 passes sequentially through the guide rod 41, the sliding frame 42, and the pre-set through holes on the connecting plate 51, and finally extends into the interior of the scraper 52, thereby locking the scraper 52 in the initial position, preventing it from moving along the guide rod 41 and preventing it from deflecting around the hinge. When the liquid level rises to the correct position and the magnetic element 63 and magnetic element 53 are magnetically aligned, the output end of the positioning element 7 retracts, releasing all constraints on the scraper 52. At this point, the magnetic repulsion force can push the scraper 52 forward to clean.

[0038] like Figure 5 and Figure 6 As shown, to prevent the scraper 52 from carrying back impurities scraped onto the filter screen 32 to the filtration area when it returns, multiple blocking mechanisms 8 are provided along the moving path of the unidirectional scraping mechanism 5 in the discharge processing area 103. In one specific embodiment, the blocking mechanism 8 includes a T-shaped rod 81 and a return spring 82. The insertion end of the T-shaped rod 81 slides through the side wall of the air flotation machine body 1 and extends into the filtration area. The return spring 82 is connected between the rod head of the T-shaped rod 81 and the outer wall of the air flotation machine body 1 to provide a restoring force. The insertion end of the T-shaped rod 81 is configured with a V-shaped structure.

[0039] When the liquid level drops and the magnetic repulsion disappears, the scraper 52 slides back to its original position along the guide rod 41 under the tension of the return spring 43. During the reset process, the scraper 52 passes through multiple sets of blocking mechanisms 8 in sequence. The V-shaped insertion end of each blocking mechanism 8 abuts against the back of the scraper 52 (i.e., the non-scraping working surface), forcing the scraper 52 to rotate upwards around the hinge axis, while simultaneously compressing the return spring 55 in the reset component. At this time, the scraper 52 lifts up, thus passing over the impurities without scraping them back. When the scraper 52 continues to move past the V-shaped insertion end, it returns to its working angle under the action of the return spring 55. The sequential action of multiple sets of blocking mechanisms 8 not only ensures the realization of the unidirectional scraping function but also causes the scraper 52 to vibrate multiple times, which helps to shake off the small amount of residual impurities adhering to the scraper 52, achieving self-cleaning of the scraper 52.

[0040] like Figure 3 As shown, the main body 1 of the air flotation unit is equipped with a discharge valve 9 that communicates with the filtration area. The inlet of the discharge valve 9 is located below the inclined plate 3 and is used to discharge the clean water filtered by the filter cloth 31. The discharge valve 9 can be configured as a solenoid valve or a manual ball valve for convenient control of the water output.

[0041] As an extended implementation, the magnetic components 53 and 63 in this embodiment can generate additional beneficial effects on the water when in use. Specifically, the magnetic field can affect the crystallization behavior of scale-forming ions such as calcium and magnesium in the water, causing calcium carbonate (CaCO3) to change from a hard, easily adherent calcite form to a softer, less adherent aragonite form, thereby reducing sedimentation at the inclined plate 3 and in the area above the discharge treatment zone 103, which is beneficial for subsequent filtration and equipment maintenance.

[0042] Example 2 This embodiment, based on Embodiment 1, provides a wastewater treatment method using the novel wastewater flotation equipment described above.

[0043] The method specifically includes the following steps: Air flotation separation: The wastewater to be treated is sequentially fed into aeration zone 101 and air flotation zone 102. A large number of tiny bubbles are generated in aeration zone 101, and in air flotation zone 102, the bubbles attach to the surface of suspended solids, grease and other impurities, causing them to float to the water surface and form a scum layer, which is then scraped off by a scum scraper.

[0044] Cleaning and filtration: As the liquid level rises in the discharge treatment area 103, the liquid flows to the inclined plate 3 and is blocked by the scraper 52. As the liquid level continues to rise, it pushes the float 61 to float upward. The float 61 drives the rotating rod 62 and the magnetic component 63 fixed thereon to rotate and rise around the damping axis. When the magnetic component 63 rotates to the position opposite to the magnetic component 53 on the one-way scraping mechanism 5 and the same pole corresponds, the output end of the positioning component 7 exits the scraper 52, the sliding frame 42 and the guide rod 41, releasing the limitation on the scraper 52. At this time, the magnetic repulsion force generated by the opposite poles drives the magnetic component 53 and the connecting plate 51, the sliding frame 42 and the scraper 52 fixed thereto to slide forward along the inclined direction of the guide rod 41 and the inclined plate 3. During the movement, the scraper 52 scrapes off the impurities accumulated on the filter cloth 31 and pushes them to the filter screen 32 at the end of the inclined plate 3 for collection.

[0045] The water after air flotation separation enters the filtration area of ​​the discharge treatment zone 103. The water flows down the inclined plate 3 and passes through multiple layers of filter cloth 31 with decreasing pore size from top to bottom for filtration. The filtered clean water passes through the area below the filter cloth 31 and is finally discharged through the discharge valve 9.

[0046] Liquid level drop and reset: Float 61 falls back with the liquid level, causing magnetic component 63 to move away from the position corresponding to magnetic component 53, and the magnetic repulsion disappears. At this time, under the restoring force of the return spring 43 of guide component 4, slide frame 42 and the unidirectional scraping mechanism 5 connected to it slide back to reset along guide rod 41.

[0047] Deflection and self-cleaning during the return process: During the reverse sliding reset of the unidirectional scraping mechanism 5, the scraper 52 passes through multiple sets of blocking mechanisms 8 in sequence. The V-shaped insertion end of each blocking mechanism 8 abuts against the back of the scraper 52, forcing the scraper 52 to rotate upward about the hinge axis, while simultaneously compressing the reset spring 55 in the return component. This deflection allows the scraper 52 to pass over the filter cloth 31 and impurities, preventing the impurities already pushed to the filter screen 32 from being scraped back. After the scraper 52 passes the V-shaped insertion end, the reset spring 55 drives the scraper 52 to return to its working angle. The sequential contact of multiple sets of blocking mechanisms 8 causes the scraper 52 to vibrate multiple times, thereby shaking off the residual impurities attached to the scraper 52, achieving self-cleaning of the scraper 52.

[0048] Cycle: After the reset is completed, the scraper 52 returns to the initial position, the output end of the positioning element 7 re-extends into the scraper 52 to lock it, and the equipment enters the next filtration and cleaning cycle.

[0049] It should be noted that, in the above method, the filter cloth 31 and filter screen 32 can also be backwashed periodically according to the water quality. The specific operation is as follows: temporarily close the discharge valve 9 to make the liquid level inside the filtration area rise and submerge the inclined plate 3. Then, use a pump to back-suction on the filter surface side of the filter cloth 31 (i.e., the top surface of the filter cloth 31) to make the water flow back to flush the filter cloth 31 and filter screen 32, flush out the deep blockages, and further enhance the cleaning effect.

[0050] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A novel wastewater treatment flotation device, comprising a flotation machine body (1), wherein the flotation machine body (1) is provided with an aeration zone (101), a flotation zone (102) and a discharge treatment zone (103) sequentially from one side to the other, and a sludge scraper is provided at the flotation zone (102), characterized in that: A right-angle plate (2) is installed at the discharge treatment area (103), and the right-angle plate (2) and one side of the discharge treatment area (103) form a filtration area; An inclined plate (3) is installed in the filtration area, and multiple layers of filter cloth (31) are laid on the inclined plate (3), with the pore size of each layer of filter cloth gradually decreasing from top to bottom; The filtration area is also equipped with a one-way scraping mechanism (5) for scraping off impurities on the inclined plate (3); A floating mechanism (6) is provided on the right-angle plate (2); Both the floating mechanism (6) and the unidirectional scraping mechanism (5) have magnetic parts, and the two magnetic parts have the same magnetism. The floating mechanism (6) is configured to rotate and rise when the liquid level rises, so that its magnetic part corresponds to the magnetic part of the one-way scraping mechanism (5). The one-way scraping mechanism (5) is driven by magnetic repulsion to slide along the inclined setting direction of the inclined plate (3) to clean the filter cloth (31) before filtration.

2. The novel wastewater treatment flotation device according to claim 1, characterized in that: The filter area is also provided with a guide (4), which includes a guide rod (41) arranged parallel to the inclined plate (3), a sliding frame (42) slidably sleeved on the guide rod (41), and a return spring (43) movably sleeved on the guide rod (41). One end of the return spring (43) is fixedly connected to the sliding frame (42), and the other end is fixedly connected to the guide rod (41). The one-way scraping mechanism (5) is connected to the sliding frame (42).

3. The novel wastewater treatment flotation equipment according to claim 2, characterized in that: The one-way scraping mechanism (5) includes a connecting plate (51), a scraper (52), and a magnetic component (53) as a magnetic part. The connecting plate (51) is fixedly installed at the bottom of the slide frame (42). The magnetic component (53) is embedded in the connecting plate (51). The scraper (52) is rotatably connected to the connecting plate (51) via a hinge. The one-way scraping mechanism (5) also includes a return component provided on the moving side of the scraper (52). The return component includes an arc tube (54), a reset spring (55), and an arc rod (56). One end of the arc tube (54) is fixedly installed on the connecting plate (51), and the other end is slidably inserted into the arc rod (56). The reset spring (55) is provided inside the arc tube (54), with one end connected to the connecting plate (51) and the other end connected to the arc rod (56). The end of the arc rod (56) away from the arc tube (54) is fixedly connected to the scraper (52).

4. The novel wastewater treatment flotation device according to claim 3, characterized in that: The floating mechanism (6) includes a float (61), a rotating rod (62), and a magnetic component two (63) as a magnetic part. The float (61) is rotatably connected to the right-angle plate (2) through the rotating rod (62) and the damping shaft. The magnetic component two (63) is fixedly installed on the float (61) and is used to be opposite to the magnetic component one (53) and magnetically corresponding when the float (61) rotates and rises to the set position as the liquid level rises.

5. A novel wastewater treatment flotation device according to claim 3, characterized in that: The guide rod (41) is also provided with a positioning element (7), and the top of the slide frame (42) is provided with an opening. The output end of the positioning element (7) passes through the guide rod (41), the slide frame (42) and the connecting plate (51), and extends into the interior of the scraper (52).

6. A novel wastewater treatment flotation device according to claim 1, characterized in that: The end area of ​​the inclined plate (3) is provided with a filter screen (32) for receiving impurities scraped by the one-way scraping mechanism (5). The main body (1) of the air flotation machine is provided with a discharge valve (9) that communicates with the filtration area. The inlet of the discharge valve (9) is located below the inclined plate (3) for discharging the clean water filtered by the filter cloth (31).

7. A novel wastewater treatment flotation device according to claim 3, characterized in that: Multiple blocking mechanisms (8) are provided along the moving path of the one-way scraping mechanism (5) in the discharge treatment area (103). The blocking mechanism (8) includes a T-shaped rod (81) and a return spring (82). The insertion end of the T-shaped rod (81) slides through the air flotation machine body (1) and extends into the filtration area. The return spring (82) connects the T-shaped rod (81) and the air flotation machine body (1). The insertion end of the T-shaped rod (81) is set in a V shape.

8. A novel wastewater treatment flotation device according to claim 1, characterized in that: Both magnetic component one (53) and magnetic component two (63) are permanent magnets, and they are arranged with the same pole facing each other to generate a repulsive magnetic force.

9. A novel wastewater treatment flotation device according to claim 1, characterized in that: The filter cloth (31) is laid in three or more layers, and the pore size of each layer of filter cloth decreases from top to bottom.

10. A novel wastewater treatment flotation method, employing a novel wastewater treatment flotation device as described in any one of claims 1-9, characterized in that: Includes the following steps: The wastewater to be treated is sequentially fed into the aeration zone (101) and the flotation zone (102) for flotation separation; The water after air flotation separation enters the filtration area of ​​the discharge treatment area (103), and is filtered layer by layer through the multi-layer filter cloth (31) on the inclined plate (3). The filtered water is discharged through the discharge valve (9). As filtration proceeds, impurities gradually accumulate on the filter cloth (31), and the liquid level in the discharge treatment area (103) gradually rises. The liquid level pushes the float (61) to drive the rotating rod (62) and the magnetic component (63) to rotate and rise. When the magnetic component 2 (63) rotates to the position opposite to the magnetic component 1 (53) on the one-way scraping mechanism (5) and the same pole corresponds, the output end of the positioning component (7) exits and the limit is released. At the same time, the magnetic repulsion drives the one-way scraping mechanism (5) to slide along the guide rod (41) and the inclined plate (3). The scraper (52) scrapes off and pushes the impurities accumulated on the filter cloth (31). As the scraper (52) is unlocked and scrapes, the liquid to be filtered gradually follows the scraper (52) to the filter cloth (31) for filtration. As filtration continues, the liquid level at the discharge treatment area (103) drops, and the float (61) falls back, causing the magnetic component (63) to leave the corresponding position. The one-way scraping mechanism (5) slides back and resets along the guide rod (41) under the restoring force of the return spring (43). During the reset process, the V-shaped insertion end of the blocking mechanism (8) acts on the scraper (52) in sequence, causing the scraper (52) to deflect around the hinge as the axis, avoiding scraping impurities back in the opposite direction, and generating vibration to clean the scraper (52) itself.

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