Vertical dissolved air flotation machine

Abstract

The utility model relates to the technical field of sewage treatment equipment, and discloses a vertical dissolved air flotation machine which comprises an air flotation machine main body and a scraping plate movably connected inside the air flotation machine main body through a chain, and a water storage tank is arranged inside the scraping plate. By arranging the water storage tank, when the scraper blade is soaked in water and moves, water below a scum layer can be collected in the water storage tank, then when the scraper blade rotates clockwise, water in the water storage tank can be sprayed out through the water outlet tank, the surface of the scraper blade is automatically flushed through flow guide of the flow guide plate, attached scum can be removed in time, and the service life of the scraper blade is prolonged. The scraping plate is kept clean, the stable slag scraping efficiency is maintained, normal operation of the air flotation machine main body is guaranteed, the scraping plate continuously and efficiently works, the probability of falling back to an air flotation tank is reduced, the water quality purification effect is guaranteed, separated scum is prevented from being mixed into liquid again, and the follow-up treatment difficulty and cost are reduced.

Description

Technical Field

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

[0002] Vertical dissolved air flotation (DAF) machines are core equipment for solid-liquid separation in wastewater desulfurization treatment. Through a dissolved air release system, dissolved air water is depressurized to release a large number of microbubbles. These bubbles adhere to suspended particles such as gypsum particles and unreacted desulfurizing agents produced during desulfurization, forming a gas-solid (liquid) composite with a specific gravity less than water. Under buoyancy, this composite floats to the water surface to form a scum layer, thus completing the separation of water and impurities. After the scum is formed, it needs to be treated by a scum scraping device consisting of a scraper and a drive mechanism. The operating speed and scraping effect are adjusted according to the properties and amount of scum. Normally, the scraper is immersed to a depth of about 15 cm to effectively collect the scum. However, traditional scum scraping devices have obvious defects. Scum easily adheres to the scraper during operation, resulting in a reduced effective scraping area and affecting the scum cleaning efficiency. Moreover, the adhered scum is easy to fall back into the flotation tank, causing secondary pollution and increasing the difficulty and cost of treatment.

[0003] However, the scrapers of traditional scum removal devices have drawbacks during operation. Although they can remove scum from the liquid, scum easily adheres to the scraper surface. Over time, the scum gradually accumulates, encroaching on the contact space between the scraper and the new scum, reducing the effective scraping area of ​​the scraper. The more scum adheres, the lower the scraper's ability to remove new scum, resulting in the scum not being cleaned in time and accumulating more and more on the surface of the flotation tank, affecting the normal operation and processing efficiency of the flotation machine. In addition, when the scraper is running, some of the scum will fall back into the flotation tank due to vibration, water flow impact, etc., and re-mix into the liquid being treated, causing secondary pollution. This causes the separated scum to mix with the liquid again, affecting the water purification effect and increasing the difficulty and cost of subsequent treatment.

[0004] According to the announcement number CN222574376U, a new type of high-efficiency vertical dissolved air flotation machine is disclosed, including an air flotation tank. A conveyor belt driven by a drive component is installed in the air flotation tank. Multiple openings are opened through the conveyor belt. Multiple annular scraper plates are fixedly connected at equal intervals on the conveyor belt. The side walls of the multiple annular scraper plates can be detachably connected to a water filter component.

[0005] Although the patent includes a flushing structure to clean the scraper plate, this cleaning structure requires the installation of water pumps, nozzles, and pipes, increasing equipment maintenance costs and difficulty. The operation of the water pumps consumes electricity, increasing the overall energy consumption of the flotation unit. For some wastewater treatment scenarios with strict energy consumption requirements, this can lead to a significant increase in operating costs. Furthermore, the installation and arrangement of components such as water pumps and pipes require a certain amount of space, which can affect the overall layout of the flotation unit, especially for wastewater treatment facilities with limited space, causing space constraints. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a vertical dissolved air flotation machine to solve the problems existing in the background art.

[0007] This utility model provides the following technical solution: a vertical dissolved air flotation machine, comprising a flotation machine body and a scraper movably connected inside the flotation machine body via a chain. The scraper has a water storage tank inside, and a water passage and an outlet channel are formed at the end face of the water storage tank inside the scraper. A guide plate is fixedly connected to the surface of the scraper. A sealing component is installed inside the water passage. A metal rod is slidably connected inside the water storage tank. An air inlet channel is formed at the end of the scraper away from the water passage. A sealing steel ball is slidably connected inside the air inlet channel. A metal mesh plate is fixedly connected to the inner wall of the air inlet channel. A liquid inlet channel is formed inside the scraper. A protrusion is fixedly connected to the bottom end of the liquid inlet channel. A water-blocking plate is rotatably connected inside the liquid inlet channel.

[0008] Furthermore, the sealing assembly includes a fixed plate fixedly connected to the inner wall of the water tank. The surface of the fixed plate has a water inlet hole. A sliding plate is slidably connected inside the fixed plate. A connecting rod is fixedly connected to the top of the sliding plate. A spring is movably installed on the outer surface of the connecting rod. A rubber sealing plate is fixedly connected to the top of the connecting rod. A water outlet hole is opened on the surface of the rubber sealing plate. Under normal conditions, when the tip of the scraper is facing down, the surface of the water blocking plate is in contact with the surface of the protrusion.

[0009] Furthermore, the interior of the water storage tank is connected to the interior of the water inlet, the interior of the water outlet is connected to the interior of the water passage, the interior of the water passage is connected to the interior of the water outlet, and the end face of the water outlet away from the water passage extends to the outer surface of the scraper.

[0010] Furthermore, the top diameter of the air intake groove is larger than the end diameter, and the outer surface of the sealing steel ball is attached to the inner wall of the small-diameter section of the air intake groove.

[0011] Furthermore, under normal conditions, the elasticity of the spring causes the sliding plate to drive the connecting rod to slide away from the water outlet tank, and the surface of the rubber sealing plate is attached to the surface of the fixed plate.

[0012] Furthermore, the length from the top of the liquid inlet tank to the tip of the scraper is 10cm, and the guide plate is arc-shaped.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. This utility model, by setting up a water storage tank and a metal rod, allows water below the scum layer to be collected inside the water storage tank when the scraper moves while submerged in water. Then, when the scraper rotates clockwise, the water inside the water storage tank is sprayed out through the outlet channel and automatically rinsed on the surface of the scraper by the guide plate. This can promptly remove attached scum, keep the scraper clean, maintain stable scum scraping efficiency, ensure the normal operation of the main body of the flotation machine, allow the scraper to work continuously and efficiently, reduce the probability of falling back into the flotation tank, ensure water purification effect, prevent separated scum from being mixed back into the liquid, and reduce the difficulty and cost of subsequent treatment.

[0015] 2. By setting a sealing component, the water inside the water tank will not gush out directly when the scraper is rotated clockwise and tilted slightly. Instead, the water will gush out completely when the scraper is rotated to a certain angle and the metal rod can slide towards the sealing component, thereby improving the cleanliness of the scraper surface. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram showing the connection between the scraper and the guide plate in this utility model;

[0018] Figure 3 This is a cross-sectional view of the scraper in this utility model;

[0019] Figure 4 This is a schematic diagram of the sealing assembly in this utility model;

[0020] Figure 5 for Figure 3 Enlarged view of point A in the middle;

[0021] Figure 6 for Figure 3 Enlarged view of point B in the middle.

[0022] The attached diagram is labeled as follows: 1. Main body of the air flotation machine; 2. Scraper; 3. Water storage tank; 4. Water passage tank; 5. Water outlet tank; 6. Guide plate; 7. Sealing assembly; 71. Fixing plate; 72. Water inlet hole; 73. Sliding plate; 74. Connecting rod; 75. Spring; 76. Rubber sealing plate; 77. Water outlet hole; 8. Metal rod; 9. Air inlet groove; 10. Sealing steel ball; 11. Metal mesh plate; 12. Liquid inlet groove; 13. Protrusion; 14. Water blocking plate. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0024] Figures 1-6 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-6 The present invention will be further described below.

[0025] Specifically, a vertical dissolved air flotation machine includes a flotation machine body 1 and a scraper 2 movably connected inside the flotation machine body 1 by a chain. The scraper 2 has a water storage tank 3 inside, and a water passage 4 and a water outlet 5 are opened at the end face of the water storage tank 3 inside the scraper 2. A guide plate 6 is fixedly connected to the surface of the scraper 2. A sealing component 7 is installed inside the water passage 4. A metal rod 8 is slidably connected inside the water storage tank 3. An air inlet 9 is opened at the end of the scraper 2 away from the water passage 4. A sealing steel ball 10 is slidably connected inside the air inlet 9. A metal mesh plate 11 is fixedly connected to the inner wall of the air inlet 9. A liquid inlet 12 is opened inside the scraper 2. A protrusion 13 is fixedly connected to the bottom of the liquid inlet 12. A water blocking plate 14 is rotatably connected inside the liquid inlet 12.

[0026] When scraper 2 is flipped over with its tip facing upward, scraper 2 is still located above the slag discharge trough. This is to ensure that the cleaned-up sewage and debris can smoothly enter the slag discharge trough.

[0027] In this implementation scheme, when the scraper 2 moves while submerged in water, the water below the scum layer is collected inside the water storage tank 3. When the scraper 2 rotates clockwise, the water inside the water storage tank 3 is sprayed out through the water outlet 5 and guided by the guide plate 6 to automatically wash the surface of the scraper 2. This can remove the attached scum in time, keep the scraper 2 clean, maintain stable scum scraping efficiency, ensure the normal operation of the main body 1 of the flotation machine, allow the scraper 2 to work continuously and efficiently, reduce the probability of falling back into the flotation tank, ensure the water purification effect, prevent the separated scum from being mixed back into the liquid, and reduce the difficulty and cost of subsequent treatment.

[0028] The sealing assembly 7 includes a fixed plate 71 fixedly connected to the inner wall of the water tank 4. The surface of the fixed plate 71 is provided with a water inlet hole 72. A sliding plate 73 is slidably connected inside the fixed plate 71. A connecting rod 74 is fixedly connected to the top of the sliding plate 73. A spring 75 is movably installed on the outer surface of the connecting rod 74. A rubber sealing plate 76 is fixedly connected to the top of the connecting rod 74. A water outlet hole 77 is provided on the surface of the rubber sealing plate 76.

[0029] In this embodiment, a complete sealing structure is formed by the connection and cooperation of components such as the fixed plate 71, the sliding plate 73, and the connecting rod 74, providing a foundation for subsequent sealing and water flow control. Under normal conditions, the spring 75 causes the sliding plate 73 to drive the connecting rod 74 to slide, and the rubber sealing plate 76 adheres to the fixed plate 71 to prevent water in the water storage tank 3 from flowing out before the rinsing conditions are met. When the scraper 2 rotates to a certain angle, the metal rod 8 squeezes the water in the water storage tank 3, increasing the pressure. The water breaks the seal between the rubber sealing plate 76 and the fixed plate 71 and sprays out through the water outlet 77, the water passage 4, and the water outlet 5, thus rinsing the scraper 2. This self-rinsing structural design allows the air flotation machine to automatically complete rinsing during the rotation of the scraper 2 without manual intervention, improving work efficiency, ensuring the cleanliness of the scraper 2, and thus maintaining the stable operation of the entire air flotation machine.

[0030] Specifically, under normal conditions, when the tip of the scraper 2 is pointing downwards, the surface of the water-blocking plate 14 is attached to the surface of the protrusion 13.

[0031] In this embodiment, under normal conditions, when the tip of the scraper 2 is facing down, the water blocking plate 14 and the protrusion 13 are in contact, which can prevent the water in the water storage tank 3 from flowing out through the liquid inlet tank 12, and avoid water loss when the scraper 2 is not rotated to the appropriate angle. This ensures that there is enough water in the water storage tank 3 to rinse the scum on the surface of the scraper 2 during the subsequent rotation of the scraper 2.

[0032] Specifically, the interior of the water storage tank 3 is connected to the interior of the water inlet 72, the interior of the water outlet 77 is connected to the interior of the water passage 4, the interior of the water passage 4 is connected to the interior of the water outlet 5, and the end face of the water outlet 5 away from the water passage 4 extends to the outer surface of the scraper 2.

[0033] In this embodiment, the interior of the water storage tank 3 is connected to the interior of the water inlet 72, allowing water in the water storage tank 3 to flow into the water inlet 72. The interior of the water outlet 77 is connected to the interior of the water passage 4, and the interior of the water passage 4 is connected to the interior of the water outlet 5. The end face of the water outlet 5 away from the water passage 4 extends to the outer surface of the scraper 2. This interconnected structure ensures that water in the water storage tank 3 can be smoothly sprayed out from the water outlet 5, realizing the rinsing function of the scraper 2 surface.

[0034] Specifically, the top diameter of the air intake groove 9 is larger than the end diameter, and the outer surface of the sealing steel ball 10 is attached to the inner wall of the small diameter section of the air intake groove 9.

[0035] In this embodiment, the top diameter of the air inlet groove 9 is larger than the end diameter. The outer surface of the sealing steel ball 10 is attached to the inner wall of the small diameter section of the air inlet groove 9. Under normal conditions, it can prevent outside air or other impurities from entering the water storage tank 3, ensuring that the water in the water storage tank 3 is in a relatively stable state. When the scraper 2 rotates to a certain angle, the sealing steel ball 10 slides, the air inlet groove 9 opens, allowing outside air to enter, pushing the metal rod 8 to squeeze the water in the water storage tank 3, thereby realizing the water spraying and rinsing function.

[0036] Specifically, under normal conditions, the elasticity of the spring 75 causes the sliding plate 73 to drive the connecting rod 74 to slide away from the water outlet 5, and the surface of the rubber sealing plate 76 is attached to the surface of the fixed plate 71.

[0037] In this embodiment, under normal conditions, the elasticity of the spring 75 causes the sliding plate 73 to slide the connecting rod 74 away from the water outlet 5. The surface of the rubber sealing plate 76 is attached to the surface of the fixed plate 71. This prevents the water in the water storage tank 3 from flowing out of the water passage 4 and the water outlet 5 before the rinsing conditions are met. It ensures that when the scraper 2 rotates to the appropriate angle and the metal rod 8 squeezes the water to increase the pressure, the water will break through the seal between the rubber sealing plate 76 and the fixed plate 71 and spray out through the water outlet 5 for rinsing.

[0038] Specifically, the length from the top of the liquid inlet tank 12 to the tip of the scraper 2 is 10cm, and the guide plate 6 is arc-shaped.

[0039] In this embodiment, the length from the top of the liquid inlet tank 12 to the tip of the scraper 2 is 10cm. This size design ensures that when the scraper 2 is immersed in water, and there are few impurities underwater, the water can smoothly enter the liquid inlet tank 12 and flow into the water storage tank 3. During the rotation of the scraper 2, the water blocking plate 14 can play a good role. The guide plate 6 is arc-shaped, which can guide the water sprayed from the water outlet tank 5 to evenly cover the surface of the scraper 2, improve the rinsing effect, and at the same time, it can make the flushed sewage flow smoothly back into the guide plate 6 along the arc-shaped guide plate 6, and flow into the slag discharge tank through both ends of the guide plate 6.

[0040] The working principle and usage process of this utility model are as follows: During use, the scraper 2 is driven to rotate by the chain on the main body 1 of the air flotation machine. When the scraper 2 is immersed in water, the water pressure will drive the water-blocking plate 14 to rotate. Water enters the water storage tank 3 through the inlet groove 12. When the scraper 2 rotates clockwise and is not perpendicular to the water surface, the water-blocking plate 14 will rotate counterclockwise due to gravity, and its end face will abut against the inside of the protrusion 13. At this time, the water in the water storage tank 3 will not flow out through the inlet groove 12. As the scraper 2 continues to rotate, the water in the water storage tank 3 will slowly flow to the end of the water storage tank 3 near the water passage 4. At the same time, the elasticity of the spring 75 will make the surface of the rubber sealing plate 76 tightly adhere to the surface of the fixing plate 71. When the scraper 2 continues to rotate to a certain angle, the sealing steel ball 10 slides towards the metal rod 8. At this time, the scraper 2 The exterior of the air inlet trough 9 is connected to the interior of the water storage tank 3. The metal rod 8 will slide quickly towards the water passage 4 and squeeze the water inside the water storage tank 3. At this time, the pressure inside the water storage tank 3 increases, and the rubber sealing plate 76 is forced to slide away from the water inlet 72. The stored water passes through the water inlet 72 and the water outlet 77 and is sprayed out through the water outlet trough 5. The water is automatically rinsed on the surface of the scraper 2 by the guide plate 6. The rinsed sewage flows back into the guide plate 6 and then flows into the sludge discharge trough through both ends of the guide plate 6. This can remove the attached sludge in time, keep the scraper 2 clean, maintain stable sludge scraping efficiency, ensure the normal operation of the main body 1 of the air flotation machine, allow the scraper 2 to work continuously and efficiently, reduce the probability of falling back into the air flotation tank, ensure the water purification effect, avoid the separated sludge from mixing back into the liquid, and reduce the difficulty and cost of subsequent treatment.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A vertical dissolved air flotation machine, comprising a flotation machine body (1) and a scraper (2) movably connected inside the flotation machine body (1) via a chain, characterized in that: The scraper (2) has a water storage tank (3) inside. The scraper (2) has a water passage (4) and a water outlet (5) at the end face of the water storage tank (3). A guide plate (6) is fixedly connected to the surface of the scraper (2). A sealing component (7) is installed inside the water passage (4). A metal rod (8) is slidably connected inside the water storage tank (3). An air inlet groove (9) is opened at the end of the scraper (2) away from the water passage (4). A sealing steel ball (10) is slidably connected inside the air inlet groove (9). A metal mesh plate (11) is fixedly connected to the inner wall of the air inlet groove (9). A liquid inlet groove (12) is opened inside the scraper (2). A protrusion (13) is fixedly connected to the bottom of the liquid inlet groove (12). A water blocking plate (14) is rotatably connected inside the liquid inlet groove (12).

2. A vertical dissolved air flotation machine according to claim 1, characterized in that: The sealing assembly (7) includes a fixed plate (71) fixedly connected to the inner wall of the water tank (4). The surface of the fixed plate (71) is provided with a water inlet hole (72). The inside of the fixed plate (71) is slidably connected with a sliding plate (73). The top of the sliding plate (73) is fixedly connected with a connecting rod (74). A spring (75) is movably installed on the outer surface of the connecting rod (74). The top of the connecting rod (74) is fixedly connected with a rubber sealing plate (76). The surface of the rubber sealing plate (76) is provided with a water outlet hole (77). Under normal conditions, when the tip of the scraper (2) is pointing downwards, the surface of the water blocking plate (14) is attached to the surface of the protrusion (13).

3. A vertical dissolved air flotation machine according to claim 2, characterized in that: The interior of the water storage tank (3) is connected to the interior of the water inlet (72), the interior of the water outlet (77) is connected to the interior of the water passage (4), the interior of the water passage (4) is connected to the interior of the water outlet (5), and the end face of the water outlet (5) away from the water passage (4) extends to the outer surface of the scraper (2).

4. A vertical dissolved air flotation machine according to claim 1, characterized in that: The top diameter of the air inlet groove (9) is larger than the end diameter, and the outer surface of the sealing steel ball (10) is attached to the inner wall of the small diameter section of the air inlet groove (9).

5. A vertical dissolved air flotation machine according to claim 2, characterized in that: Under normal conditions, the elasticity of the spring (75) causes the sliding plate (73) to drive the connecting rod (74) to slide away from the water outlet (5), and the surface of the rubber sealing plate (76) is attached to the surface of the fixing plate (71).

6. A vertical dissolved air flotation machine according to claim 1, characterized in that: The length from the top of the liquid inlet tank (12) to the tip of the scraper (2) is 10cm, and the guide plate (6) is arc-shaped.

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