A slag scraping mechanism for a dissolved air flotation device

Abstract

This utility model belongs to the field of dissolved air flotation (DAF) devices, specifically a scum scraping mechanism for a DAF device. It addresses the problems of existing scum scraping devices where the scraping depth is not adjustable, making it difficult to adjust the scraping depth according to the actual accumulation of scum, thus failing to completely remove scum and affecting effluent quality. Furthermore, if the scraping depth cannot be precisely controlled, the scum layer is easily disturbed excessively, causing some scum to re-mix into the water, reducing the flotation treatment effect. The proposed solution includes a DAF device body with a top frame welded to its top side, and a scum storage chamber inside the body. In use, this utility model allows the scraper plate to move up and down for adjustment, facilitating the adjustment of the scraping depth according to the actual accumulation of scum, thereby thoroughly removing scum. It also enables precise adjustment of the scraper plate, preventing excessive disturbance of the scum layer and the re-mixing of scum into the water.

Description

Technical Field

[0001] This utility model relates to the technical field of dissolved air flotation devices, and in particular to a slag scraping mechanism for a dissolved air flotation device. Background Technology

[0002] The scum scraping mechanism of the dissolved air flotation unit is a key component of the flotation treatment system. It is mainly used to remove the scum layer formed on the surface of the flotation tank. This mechanism continuously or intermittently scrapes off the solid pollutants (scum) suspended on the water surface by mechanical means to ensure the normal operation and treatment effect of the flotation system.

[0003] The existing methods are not adjustable in terms of the scraping depth of most scum scrapers, which makes it difficult to adjust the scraping depth according to the actual accumulation of scum. As a result, the scum cannot be completely removed, which affects the quality of the effluent. Furthermore, if the scraping depth cannot be precisely controlled during the scraping process, the scum layer is easily disturbed excessively, causing some scum to re-mix into the water and reducing the effectiveness of the flotation treatment.

[0004] To address the aforementioned problems, this utility model document proposes a slag scraping mechanism for a dissolved air flotation device. Utility Model Content

[0005] This utility model provides a scum scraping mechanism for a dissolved air flotation device, which solves the problems of existing technologies where the scraping depth of most scum scrapers is not adjustable, making it difficult to adjust the scraping depth according to the actual accumulation of scum, thus failing to completely remove scum and affecting the quality of the effluent. Furthermore, if the scraping depth cannot be precisely controlled during scraping, the scum layer is easily disturbed excessively, causing some scum to re-mix into the water, reducing the flotation treatment effect.

[0006] This utility model provides the following technical solution:

[0007] A sludge scraping mechanism for a dissolved air flotation device includes:

[0008] The dissolved air flotation device body has a top frame welded to its top side, a slag storage chamber opened inside the dissolved air flotation device body, a baffle welded to the inner wall of the dissolved air flotation device body, and a clear water chamber and a drainage chamber separated inside the dissolved air flotation device body by the baffle, with a discharge port opened on one side of the baffle.

[0009] The slag scraping mechanism is installed on the top frame during the operation of the dissolved air flotation device to scrape off the slag layer formed in the dissolved air flotation device.

[0010] A water control mechanism is installed on the dissolved air flotation device body to control the discharge of unclean water.

[0011] In one possible design, the slag scraping mechanism includes rotating rods, sprockets, chains, motors, mounting brackets, slots, locking nuts, slides, sliding plates, and scraper plates. The two rotating rods are rotatably connected between the inner walls of the two sides of the top frame via bearings. The four sprockets are respectively fixedly mounted on the outer walls of the two rotating rods. The four sprockets are divided into two groups, and each chain is drivenly connected to each group of sprockets. The motor is fixedly mounted on one side of the top frame, and the output end of the motor is fixedly connected to one end of one of the rotating rods via a coupling.

[0012] In one possible design, two screws are fixedly installed on one side of each chain, and a limit ring is fixedly installed on the outer wall of each screw. The four screws are divided into two groups, and each mounting bracket is disposed between each group of screws. The slot is opened on the bottom side of the mounting bracket for limiting and engaging with the outer wall of the screw. Each locking nut is threaded onto the outer wall of the screw for locking and fixing the mounting bracket.

[0013] In one possible design, the chute is formed inside the mounting frame, the slide plate slides within the chute, the scraper is fixedly installed on the top side of the slide plate for scraping off the scum layer formed in the dissolved air flotation device, each mounting frame has a locking nut threaded to one side for locking the slide plate, each slide plate has a limit strip welded to both sides, the inner wall of the chute has a limit groove for the limit strip to slide, and each limit strip has a dimension line on one side.

[0014] In one possible design, the water control mechanism includes a fixed frame, a lead screw, an adjusting handwheel, a water control plate, and a telescopic rod. The fixed frame is welded to the top side of the dissolved air flotation device body. The lead screw is rotatably connected to the inside of the fixed frame via a bearing. The adjusting handwheel is fixedly installed on the top outer wall of the lead screw and is used to drive the lead screw to rotate.

[0015] In one possible design, the water control plate is threaded to the outer wall of the screw that is used in conjunction with it, for controlling the discharge port on the baffle. Both telescopic rods are fixedly installed between the bottom side of the water control plate and the bottom inner wall of the clear water chamber, for limiting the up and down movement of the water control plate.

[0016] In this application, during use, the scum scraping mechanism of the dissolved air flotation device is first used to scrape off the scum layer formed in the dissolved air flotation device, so as to facilitate the subsequent discharge of clean water and unclean water. When the dissolved air water in the dissolved air flotation device is released into the scum scraping area, two rotating rods are rotatably connected between the inner walls of the two sides of the top frame through bearings. Four sprockets are respectively fixed on the outer walls of the two rotating rods and connected by chain drive, forming two sets of chain drive systems. The motor serves as the power source, driving one of the rotating rods to rotate. Through the transmission of the sprockets and chains, it drives the other rotating rod to rotate synchronously. Thus, the chain drive system drives the scraper plate to move back and forth on the top surface of the dissolved air flotation device to facilitate the scraping of dissolved air. The scum layer formed on the water surface achieves scum removal treatment. The mounting frame is fixed to the screw on the chain by the slot and locking nut, which facilitates the installation and disassembly of the mounting frame and improves convenience. At the same time, the slide plate can slide within the trough and drive the scraper to move up and down for adjustment. This allows for adjustment of the scraping depth according to the actual accumulation of scum, thereby thoroughly removing scum and avoiding affecting the quality of the effluent. The locking nut is used to lock and fix the slide plate to prevent it from sliding during the scraping process. The cooperation of the limiting strip and the limiting groove ensures the stable sliding of the slide plate within the trough. The dimension line is used to indicate the sliding position of the slide plate, enabling precise adjustment of the scraper and preventing excessive disturbance of the scum layer, which would cause some scum to re-mix into the water and reduce the air flotation treatment effect.

[0017] After the scum layer on the dissolved air flotation (DAF) water is scraped off, the scraped scum falls into the scum storage chamber and is discharged through the scum discharge pipe connected to one side of the DAF device body for scum treatment. Clean water remains at the bottom of the clear water chamber and is discharged to the clear water area through the clear water pipe connected to the bottom of the DAF device body for use as circulating water. During this process, rotating the adjusting handwheel drives the lead screw to rotate through the bearing in the fixed frame. The lead screw is connected to the thread inside the water control plate, which allows the position of the water control plate to be adjusted, facilitating its raising and lowering. This helps control the opening and closing of the discharge port on the baffle, controlling the discharge of unclean water, which enters the drainage chamber for discharge. At the same time, the telescopic rod is fixed between the bottom side of the water control plate and the bottom inner wall of the clear water chamber, which helps limit and guide the raising and lowering of the water control plate, ensuring its stable raising and lowering and improving its applicability.

[0018] In this utility model, the slag scraping mechanism of the dissolved air flotation device can drive the scraper plate to move back and forth on the top surface of the dissolved air flotation device, so as to scrape off the slag layer formed on the surface of the dissolved air water, thereby achieving slag removal treatment. It is beneficial to adjust the scraping depth according to the actual accumulation of slag, so as to completely remove the slag.

[0019] In this utility model, the sludge scraping mechanism of the dissolved air flotation device can adjust the position of the water control plate through the water control mechanism, which facilitates the raising and lowering of the water control plate, thereby helping to control the opening and closing degree of the discharge port on the baffle and realize the controlled discharge of unclean water.

[0020] In this invention, the scraper plate can be moved up and down for adjustment, which is beneficial to adjust the scraping depth according to the actual accumulation of scum, thereby thoroughly removing scum and avoiding affecting the quality of the effluent. It also enables precise adjustment of the scraper plate, which helps to prevent excessive disturbance of the scum layer, causing some scum to re-mix into the water and reduce the air flotation treatment effect. Attached Figure Description

[0021] Figure 1 This is a front view structural schematic diagram of the slag scraping mechanism of a dissolved air flotation device provided in an embodiment of the present utility model;

[0022] Figure 2 A schematic diagram of the slag scraping mechanism of a dissolved air flotation device provided in this embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the disassembled state structure of the scraper plate of the scraper mechanism of a dissolved air flotation device provided in an embodiment of this utility model.

[0024] Figure 4 A schematic diagram of the water control mechanism of the sludge scraping mechanism of a dissolved air flotation device provided in an embodiment of this utility model;

[0025] Figure 5 This is a schematic diagram of the main body structure of a dissolved air flotation device, which is a slag scraping mechanism provided in an embodiment of the present invention.

[0026] Figure label:

[0027] 1. Dissolved air flotation device body; 2. Top frame; 3. Rotating rod; 4. Sprocket; 5. Chain; 6. Motor; 7. Screw; 8. Limiting ring; 9. Mounting frame; 10. Slot; 11. Locking nut; 12. Slide groove; 13. Slide plate; 14. Slag scraper; 15. Limiting strip; 16. Limiting groove; 17. Dimension line; 18. Locking screw; 19. Fixing frame; 20. Lead screw; 21. Adjusting handwheel; 22. Water control plate; 23. Telescopic rod; 24. Slag storage chamber. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0029] The problem in the field of existing dissolved air flotation devices is that the scraping depth of most scrapers is not adjustable, which makes it difficult to adjust the scraping depth according to the actual accumulation of scum. As a result, the scum cannot be completely removed, affecting the quality of the effluent. Furthermore, if the scraping depth cannot be precisely controlled during scraping, the scum layer is easily disturbed excessively, causing some scum to re-mix into the water and reducing the flotation treatment effect. To address this problem, this solution designs a scraping mechanism.

[0030] Please refer to Figures 1-5 A slag scraping mechanism, comprising:

[0031] The dissolved air flotation (DAF) device body 1 has a top frame 2 welded to its top side. A scum storage chamber 24 is provided inside the body 1. Scum scraped off falls into the scum storage chamber 24 and is discharged through a scum discharge pipe connected to one side of the body 1 for scum treatment. A baffle is welded to the inner wall of the body 1, separating a clear water chamber and a drain chamber. A discharge port is provided on one side of the baffle. Clean water remains at the bottom of the clear water chamber and is discharged to the clear water zone through a clear water pipe connected to the bottom of the body 1 for use as circulating water. Impure water enters the drain chamber for discharge.

[0032] The slag scraping mechanism in the dissolved air flotation unit is installed on the top frame 2 to scrape off the slag layer formed in the dissolved air flotation unit. The slag scraping mechanism includes rotating rods 3, sprockets 4, chains 5, motors 6, mounting brackets 9, slots 10, locking nuts 11, sliding grooves 12, sliding plates 13, and scraper plates 14. The two rotating rods 3 are rotatably connected between the inner walls of the two sides of the top frame 2 through bearings. The four sprockets 4 are fixedly installed on the outer walls of the two rotating rods 3, and the four sprockets 4 are divided into two groups. Each chain 5 is driven and connected to each set of sprockets 4. The motor 6 is fixedly installed on one side of the top frame 2. The output end of the motor 6 is fixedly connected to one end of one of the rotating rods 3 through a coupling. The motor 6 serves as a power source, driving one of the rotating rods 3 to rotate. Through the transmission of the sprockets 4 and the chain 5, it drives the other rotating rod 3 to rotate synchronously. Thus, through the chain transmission system, the scraper plate 14 can be driven to move back and forth on the top surface of the dissolved air flotation device to scrape off the scum layer formed on the surface of the dissolved air water, thereby achieving scum removal treatment.

[0033] Two screws 7 are fixedly installed on one side of each chain 5. A limit ring 8 is fixedly installed on the outer wall of each screw 7. The four screws 7 are divided into two groups. Each mounting bracket 9 is set between each group of screws 7. A slot 10 is opened on the bottom side of the mounting bracket 9 for limiting and engaging with the outer wall of the screw 7. Each locking nut 11 is threaded to the outer wall of the screw 7 for locking and fixing the mounting bracket 9. The mounting bracket 9 is fixed to the screw 7 on the chain 5 through the slot 10 and the locking nut 11, so as to facilitate the installation and disassembly of the mounting bracket 9 and improve convenience.

[0034] The chute 12 is located inside the mounting frame 9. The slide plate 13 is limited to slide inside the chute 12. The scraper plate 14 is fixedly installed on the top side of the slide plate 13 and is used to scrape off the scum layer formed in the dissolved air flotation device. Each mounting frame 9 has a locking screw 18 threaded on one side to lock and fix the slide plate 13. The slide plate 13 can slide within the chute 12 and drive the scraper plate 14 to move up and down for adjustment. This is beneficial to adjust the scraping depth according to the actual accumulation of scum, so as to thoroughly remove scum and avoid affecting the quality of the effluent. The locking screw 18 is used to lock and fix the slide plate 13 to prevent it from sliding during the scraping process. Each slide plate 13 has a limit strip 15 welded on both sides. The inner wall of the slide groove 12 is provided with a limit groove 16 for the limit strip 15 to slide. Each limit strip 15 has a dimension line 17 on one side. The cooperation between the limit strip 15 and the limit groove 16 ensures the stable sliding of the slide plate 13 in the slide groove 12. The dimension line 17 is used to indicate the sliding position of the slide plate 13, so as to realize the precise adjustment of the slag scraper 14. This helps to prevent excessive disturbance of the slag layer, causing some slag to be remixed into the water and reducing the air flotation treatment effect.

[0035] This application can be used in the field of dissolved air flotation devices, or in other fields applicable to this application. Example

[0036] refer to Figures 1-4 An improvement based on Example 1: a slag scraping mechanism for a dissolved air flotation device, which is applied to the field of dissolved air flotation devices;

[0037] A water control mechanism, installed on the dissolved air flotation device body 1, is used to control the discharge of unclean water. The water control mechanism includes a fixed frame 19, a lead screw 20, an adjusting handwheel 21, a water control plate 22, and telescopic rods 23. The fixed frame 19 is welded to the top side of the dissolved air flotation device body 1. The lead screw 20 is rotatably connected to the inside of the fixed frame 19 via bearings. The adjusting handwheel 21 is fixedly installed on the top outer wall of the lead screw 20 and is used to drive the lead screw 20 to rotate. The water control plate 22 is threadedly connected to the outer wall of the matching lead screw 20 and is used to control the discharge port on the baffle. Two telescopic rods 23 are fixedly installed between the bottom side of the water control plate 22 and the bottom inner wall of the clear water chamber, and are used to limit the vertical movement of the water control plate 22.

[0038] By rotating the adjustment handwheel 21, the lead screw 20 can be driven to rotate within the fixed frame 19 via the bearing. The lead screw 20 is connected to the internal thread of the water control plate 22, which allows the position of the water control plate 22 to be adjusted. This facilitates the raising and lowering of the water control plate 22, thereby controlling the opening and closing of the discharge port on the baffle and controlling the discharge of unclean water. At the same time, the telescopic rod 23 is fixed between the bottom side of the water control plate 22 and the bottom inner wall of the clean water chamber, which helps to limit and guide the up and down movement of the water control plate 22, ensuring its stable raising and lowering and improving its applicability.

[0039] However, as is well known to those skilled in the art, the working principles and wiring methods of the dissolved air flotation device body 1 and the motor 6 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0040] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations, but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0041] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A slag scraping mechanism for a dissolved air flotation device, characterized in that, include: The dissolved air flotation device body (1) has a top frame (2) welded to its top side. The dissolved air flotation device body (1) has a slag storage chamber (24) inside. The inner wall of the dissolved air flotation device body (1) has a baffle welded to it. The interior of the dissolved air flotation device body (1) is divided into a clear water chamber and a drainage chamber by the baffle. A discharge port is opened on one side of the baffle. The slag scraping mechanism in the dissolved air flotation device is set on the top frame (2) to scrape off the slag layer formed in the dissolved air flotation device. A water control mechanism is installed on the dissolved air flotation device body (1) to control the discharge of unclean water.

2. The slag scraping mechanism of the dissolved air flotation device according to claim 1, characterized in that, The slag scraping mechanism includes a rotating rod (3), a sprocket (4), a chain (5), a motor (6), a mounting bracket (9), a slot (10), a locking nut (11), a slide (12), a sliding plate (13), and a slag scraper (14). The two rotating rods (3) are rotatably connected between the inner walls of the two sides of the top frame (2) through bearings. The four sprockets (4) are respectively fixed on the outer walls of the two rotating rods (3). The four sprockets (4) are divided into two groups. Each chain (5) is driven and connected to each group of sprockets (4). The motor (6) is fixedly installed on one side of the top frame (2). The output end of the motor (6) is fixedly connected to one end of one of the rotating rods (3) through a coupling.

3. The slag scraping mechanism of the dissolved air flotation device according to claim 2, characterized in that, Two screws (7) are fixedly provided on one side of each chain (5). A limit ring (8) is fixedly provided on the outer wall of each screw (7). The four screws (7) are divided into two groups. Each mounting bracket (9) is provided between each group of screws (7). The slot (10) is opened on the bottom side of the mounting bracket (9) for limiting and engaging with the outer wall of the screw (7). Each locking nut (11) is threaded to the outer wall of the screw (7) for locking and fixing the mounting bracket (9).

4. The slag scraping mechanism of the dissolved air flotation device according to claim 3, characterized in that, The chute (12) is opened inside the mounting frame (9), the slide plate (13) slides within the chute (12), the scraper plate (14) is fixedly installed on the top side of the slide plate (13) for scraping off the scum layer formed in the dissolved air flotation device, a locking screw (18) is threaded on one side of each mounting frame (9) for locking the slide plate (13), a limit strip (15) is welded on both sides of each slide plate (13), a limit groove (16) is opened on the inner wall of the chute (12) for the limit strip (15) to slide, and a dimension line (17) is provided on one side of each limit strip (15).

5. The slag scraping mechanism of a dissolved air flotation device according to claim 1, characterized in that, The water control mechanism includes a fixed frame (19), a lead screw (20), an adjusting handwheel (21), a water control plate (22), and a telescopic rod (23). The fixed frame (19) is welded to the top side of the dissolved air flotation device body (1). The lead screw (20) is rotatably connected to the inside of the fixed frame (19) through a bearing. The adjusting handwheel (21) is fixedly installed on the top outer wall of the lead screw (20) and is used to drive the lead screw (20) to rotate.

6. The slag scraping mechanism of a dissolved air flotation device according to claim 5, characterized in that, The water control plate (22) is threaded to the outer wall of the screw (20) used in conjunction with it, and is used to control the discharge port on the baffle. The two telescopic rods (23) are fixedly set between the bottom side of the water control plate (22) and the bottom inner wall of the clear water chamber, and are used to limit the up and down movement of the water control plate (22).

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