Air floatation device for sewage treatment

Abstract

The utility model relates to the field of sewage treatment equipment, and discloses an air flotation device for sewage treatment, which comprises an air flotation machine, two chains are arranged above the air flotation machine, a partition plate is fixedly connected to the bottom end in the air flotation machine, the air flotation machine is divided into two cavities by the partition plate, an air flotation cavity is arranged on the right side, and a slag discharge cavity is arranged on the left side. The device further comprises a dirt scraping mechanism and a guide mechanism, the dirt scraping mechanism is arranged between the two chains and used for scraping impurities produced by the air flotation cavity and impurities attached to the inner wall of the air flotation cavity, an air bag is conveniently extruded to the inner wall of the air flotation cavity through a supporting spring, the sealing performance of a mounting groove is guaranteed through a diaphragm, the impurities are prevented from flowing into the mounting groove, and the service life of the air flotation cavity is prolonged. Therefore, when the chain drives the scraping plate to scrape the impurity suspension layer, the scraping plate drives the air bag to move along the inner wall of the air floatation cavity, so that impurities attached to the inner wall of the air floatation cavity are scraped, and the situation that the impurities flow out of a gap between the scraping plate and the inner wall of the air floatation cavity, and the scraping efficiency is reduced is avoided.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment equipment, specifically a flotation device for wastewater treatment. Background Technology

[0002] An air flotation (AF) machine is a commonly used water treatment device. It primarily utilizes the formation and buoyancy of air bubbles to achieve solid-liquid separation. Its working principle involves injecting a large number of tiny air bubbles into the liquid to be treated, causing solid particles in the liquid to adhere to the bubbles and float to the surface, forming a foam layer. By scraping away this foam layer, solid impurities are removed.

[0003] Chinese utility model patent CN216472349U discloses a high-efficiency dissolved air flotation device for sewage treatment, which can reduce the hydraulic loss of influent and reduce energy consumption. It can generate a swirling effect in the inner cavity of the dissolved air tank, and the adjacent sludge discharge pipes can discharge sludge synchronously, thereby enhancing the sludge removal efficiency of the high-efficiency dissolved air flotation device for sewage treatment.

[0004] However, when the patented method uses a scraper to scrape away the suspended impurity layer, in order to ensure that the scraper can move inside the flotation machine, the length of the scraper is usually less than the length of the inner wall of the flotation machine. Due to the lack of a mechanism to increase the length of the scraper, when the scraper moves, impurities on one side are easy to flow out from the gap between the scraper and the inner wall of the flotation machine, resulting in a reduction in the amount of impurities scraped and a decrease in scraping efficiency. Based on this, we propose a flotation device for wastewater treatment. Utility Model Content

[0005] The purpose of this invention is to provide an air flotation device for wastewater treatment to solve the problems existing in the background art.

[0006] The technical solution of this utility model is: a flotation device for sewage treatment, including a flotation machine, two chains are arranged above the flotation machine, a partition is fixedly connected to the bottom of the flotation machine, and the flotation machine is divided into two chambers by the partition, the right side is the flotation chamber and the left side is the sludge discharge chamber, and also includes a scraping mechanism and a guiding mechanism. The scraping mechanism is arranged between the two chains and is used to scrape off the impurities produced in the flotation chamber and the impurities attached to its inner wall. The guiding mechanism is arranged on the inner wall of the flotation chamber and is used to scrape off the impurities attached to both sides of the scraping mechanism.

[0007] Preferably, the top surface of the partition is configured as an arc-shaped surface that bulges upward and to the left of the air flotation cavity.

[0008] Preferably, a motor is mounted on one side of the air flotation machine via an external plate, and a synchronous belt pulley transmission device is mounted on the output shaft end of the motor. Several bearing seats are fixedly connected to the top of the air flotation machine, and the bearing seats are arranged in a rectangular array. A first rotating rod is rotatably connected between two bearing seats on the right side of the air flotation machine. One end of the first rotating rod is fixedly connected to one side of the synchronous belt pulley transmission device. Both sides of the outer wall of the first rotating rod are fixedly connected to driving gears. A second rotating rod is rotatably connected between two bearing seats on the left side of the air flotation machine. Both sides of the outer wall of the second rotating rod are fixedly connected to driven gears. The driving gear and driven gear on the front side of the air flotation machine and the driving gear and driven gear on the rear side of the air flotation machine are each a group. Two chains are respectively sleeved on each group of driving gears and driven gears.

[0009] Preferably, the scraping mechanism includes two scrapers, and two mounting plates are fixedly connected between the two chains. The two mounting plates are arranged along the periphery of the chains. One side of each scraper is fixedly connected to one side of each of the two mounting plates. Each scraper has a mounting groove at both ends. A plurality of support springs are fixedly connected to the inner wall of the mounting groove. The plurality of support springs are arranged linearly and equidistantly. One end of each set of support springs is fixedly connected to the same moving plate. A connecting plate is fixedly connected to one side of the moving plate. An airbag is fixedly connected to one side of the connecting plate. A diaphragm is sleeved on the outside of the moving plate. One side of each of the two diaphragms is fixedly connected to one end of each scraper, and the other side is fixedly connected to one side of each of the two connecting plates.

[0010] Preferably, the guiding mechanism includes two guide plates, one side of which is fixedly connected to the top of both sides of the air flotation cavity, and a guide groove is provided on the right side of each guide plate.

[0011] Preferably, the top surfaces of both guide plates are configured as arc-shaped surfaces that bulge outwards from the air flotation machine.

[0012] This utility model provides an improved air flotation device for wastewater treatment, which has the following improvements and advantages compared with the prior art:

[0013] 1. This utility model uses a support spring to facilitate the compression of the airbag against the inner wall of the air flotation cavity, and a diaphragm to ensure the sealing of the installation groove, preventing impurities from flowing into the installation groove. Thus, when the chain drives the scraper to scrape off the suspended impurity layer, the scraper drives the airbag to move along the inner wall of the air flotation cavity, thereby scraping off the impurities attached to the inner wall of the air flotation cavity, preventing impurities from flowing out from the gap between the scraper and the inner wall of the air flotation cavity, thus reducing the scraping efficiency.

[0014] 2. This utility model uses a guide plate so that when the scraper located above is about to circulate into the air flotation cavity under the action of the chain, the scraper drives the outer side of the air bag to contact one side of the guide plate, causing the air bag to be squeezed. The squeezed air bag moves along one side of the guide plate, and due to the cooperation of the guide plate and the guide groove, the impurities attached to the outer surface of the air bag are scraped back into the air flotation cavity. This ensures that after the air bag passes the guide plate, it can fit tightly against the inner wall of the air flotation cavity, completing the subsequent cleaning work of the inner wall of the air flotation cavity. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This utility model Figure 1 Schematic diagram of the structure of region A in the middle;

[0017] Figure 3 This is a schematic diagram of the chain structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the airbag structure of this utility model;

[0019] Figure 5 This is a right view of a scraper of this utility model;

[0020] Figure 6 This is a partial cross-sectional view of the scraper of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Air flotation machine; 2. Motor; 3. Synchronous belt pulley transmission device; 4. Bearing housing; 5. First rotating rod; 6. Driving gear; 7. Second rotating rod; 8. Driven gear; 9. Chain; 10. Mounting plate; 11. Scraper; 12. Mounting groove; 13. Support spring; 14. Moving plate; 15. Connecting plate; 16. Airbag; 17. Diaphragm; 18. Guide plate; 19. Partition plate; 20. Guide groove. 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] See attached document Figures 1-6A flotation device for wastewater treatment includes a flotation machine 1, with two chains 9 mounted on top of the flotation machine 1. A partition 19 is fixedly connected to the bottom of the flotation machine 1, dividing the flotation machine 1 into two chambers: a flotation chamber on the right and a sludge discharge chamber on the left. The device also includes a scraping mechanism and a guiding mechanism. The scraping mechanism is located between the two chains 9 and is used to scrape off impurities produced in the flotation chamber and impurities attached to its inner wall. The guiding mechanism is located on the inner wall of the flotation chamber and is used to scrape off impurities attached to the sides of the scraping mechanism, thus completing the subsequent scraping work on the inner wall of the flotation chamber.

[0026] In this implementation scheme, the scraping mechanism facilitates the removal of the suspended layer of impurities in the flotation chamber and also removes impurities adhering to the inner wall of the flotation chamber. This prevents impurities from flowing out through the gap between the scraping mechanism and the inner wall of the flotation chamber, thus reducing scraping efficiency. Furthermore, through the guiding mechanism, when the upper scraping mechanism is about to circulate into the flotation chamber, it can scrape off the impurities adhering to both sides of the scraping mechanism. At the same time, the two sides of the scraping mechanism are reintroduced into the inner wall of the flotation chamber and fit tightly against the inner wall, completing the subsequent scraping work on the inner wall of the flotation chamber.

[0027] Specifically, the top surface of the partition 19 is configured as an arc-shaped surface that protrudes to the upper left of the air flotation cavity.

[0028] In this embodiment, sludge is conveniently guided out of the sludge chamber along the raised arc surface of the partition 19.

[0029] Specifically, a motor 2 is mounted on one side of the air flotation machine 1 via an external plate. A synchronous belt pulley transmission device 3 is mounted on the output shaft end of the motor 2. Several bearing seats 4 are fixedly connected to the top of the air flotation machine 1. The bearing seats 4 are arranged in a rectangular array. A first rotating rod 5 is rotatably connected between two bearing seats 4 on the right side of the air flotation machine 1. One end of the first rotating rod 5 is fixedly connected to one side of the synchronous belt pulley transmission device 3. Both sides of the outer wall of the first rotating rod 5 are fixedly connected to driving gears 6. A second rotating rod 7 is rotatably connected between two bearing seats 4 on the left side of the air flotation machine 1. Both sides of the outer wall of the second rotating rod 7 are fixedly connected to driven gears 8. The driving gears 6 and driven gears 8 located on the front side of the air flotation machine 1 and the driving gears 6 and driven gears 8 located on the rear side of the air flotation machine 1 are each a group. Two chains 9 are respectively sleeved on each group of driving gears 6 and driven gears 8.

[0030] In this embodiment, the chain 9 meshes with the driving gear 6 and the driven gear 8, and the synchronous belt pulley transmission device 3 consists of two gears and a gear track.

[0031] Specifically, the scraping mechanism includes two scrapers 11, and two mounting plates 10 are fixedly connected between the two chains 9. The two mounting plates 10 are arranged around the circumference of the chains 9. One side of each of the two scrapers 11 is fixedly connected to one side of each of the two mounting plates 10. Both ends of the scrapers 11 are provided with mounting grooves 12. Several support springs 13 are fixedly connected to the inner wall of the mounting grooves 12. The support springs 13 are arranged linearly and equidistantly. One end of each set of support springs 13 is fixedly connected to the same moving plate 14. One side of the moving plate 14 is fixedly connected to a connecting plate 15. One side of the connecting plate 15 is fixedly connected to an airbag 16. A diaphragm 17 is sleeved on the outside of the moving plate 14. One side of each of the two diaphragms 17 is fixedly connected to both ends of the scrapers 11, and the other side is fixedly connected to one side of each of the two connecting plates 15.

[0032] In this embodiment, due to the function of the diaphragm 17, impurities are prevented from flowing into the mounting groove 12, and the width of the diaphragm 17 is greater than the width of the moving plate 14. The material of the diaphragm 17 is polyvinylidene fluoride.

[0033] Specifically, the guiding mechanism includes two guide plates 18, one side of which is fixedly connected to the top of both sides of the air flotation cavity, and the right side of each guide plate 18 is provided with a guide groove 20.

[0034] In this embodiment, the guide plate 18 and the guide groove 20 work together to scrape and guide the impurities attached to the outside of the airbag 16.

[0035] Specifically, the top surfaces of both guide plates 18 are configured as arc-shaped surfaces that bulge outwards from the air flotation machine 1.

[0036] In this embodiment, when the scraper 11 located above is about to circulate into the air flotation cavity under the action of the chain 9, the guide plate 18 can squeeze and guide the airbag 16.

[0037] The working principle and usage process of this utility model are as follows: When in use, firstly, start the motor 2, so that the motor 2 drives the first rotating rod 5 to rotate on the bearing seat 4 through the synchronous belt pulley transmission device 3. Due to the action of the chain 9, the first rotating rod 5 drives the driving gear 6 to rotate, and the driving gear 6 drives the chain 9 and the driven gear 8 to rotate. Then the driven gear 8 drives the second rotating rod 7 to rotate on the bearing seat 4. In this way, the chain 9 drives the two scrapers 11 to perform cyclical motion.

[0038] Secondly, when the scraper 11 moves cyclically into the flotation chamber, the force of the two sets of support springs 13 drives the moving plate 14 and the connecting plate 15 to move towards both sides of the inner wall of the flotation chamber. As a result, the connecting plate 15 drives the airbag 16 to press against the inner wall of the flotation chamber, and the diaphragm 17 ensures the sealing of the installation groove 12, preventing impurities from flowing into the installation groove 12. Thus, when the chain 9 drives the scraper 11 to scrape off the suspended impurity layer in the flotation chamber, the scraper 11 drives the airbag 16 to move along the inner wall of the flotation chamber, thereby scraping off the impurities attached to the inner wall of the flotation chamber, preventing impurities from flowing out from the gap between the scraper 11 and the inner wall of the flotation chamber, thus reducing the scraping efficiency. The scraper 11 drives the impurities on one side to move along the flotation chamber from right to left. When passing the diaphragm 19, the impurities are pushed into the slag discharge chamber for subsequent processing.

[0039] Additionally, when the scraper 11 located above is about to circulate into the air flotation cavity under the action of the chain 9, the scraper 11 drives the outer side of the airbag 16 to contact one side of the guide plate 18, causing the airbag 16 to be squeezed. The squeezed airbag 16 moves along one side of the guide plate 18, thereby causing the airbag 16 to drive the connecting plate 15 and the moving plate 14 to move into the mounting groove 12, causing the support spring 13 to be compressed. Due to the reaction force of the support spring 13, the airbag 16 is squeezed against one side of the guide plate 18. In conjunction with the guide groove 20, the impurities attached to the outer surface of the airbag 16 are scraped back into the air flotation cavity. This ensures that after the airbag 16 passes the guide plate 18, it is once again squeezed against the inner wall of the air flotation cavity by the reaction force of the support spring 13, thus completing the subsequent cleaning work on the inner wall of the air flotation cavity.

[0040] 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 above-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 flotation device for wastewater treatment, characterized in that: The system includes an air flotation machine (1), with two chains (9) on top of the air flotation machine (1). A partition (19) is fixedly connected to the bottom of the air flotation machine (1), and the air flotation machine (1) is divided into two chambers by the partition (19). The right side is the air flotation chamber, and the left side is the slag discharge chamber. The system also includes a scraping mechanism and a guiding mechanism. The scraping mechanism is located between the two chains (9) and is used to scrape off the impurities produced by the air flotation chamber and the impurities attached to its inner wall. The guiding mechanism is located on the inner wall of the air flotation chamber and is used to scrape off the impurities attached to both sides of the scraping mechanism.

2. The air flotation device for wastewater treatment according to claim 1, characterized in that: The top surface of the partition (19) is configured as an arc-shaped surface that protrudes to the upper left of the air flotation cavity.

3. The air flotation device for wastewater treatment according to claim 1, characterized in that: A motor (2) is mounted on one side of the air flotation machine (1) via an external plate. A synchronous belt pulley transmission device (3) is mounted on the output shaft end of the motor (2). Several bearing seats (4) are fixedly connected to the top of the air flotation machine (1). The bearing seats (4) are arranged in a rectangular array. A first rotating rod (5) is rotatably connected between two bearing seats (4) located on the right side of the air flotation machine (1). One end of the first rotating rod (5) is fixedly connected to one side of the synchronous belt pulley transmission device (3). The outer wall of the first rotating rod (5) has two... A drive gear (6) is fixedly connected to each side. A second rotating rod (7) is rotatably connected between the two bearing seats (4) on the left side of the air flotation machine (1). Driven gears (8) are fixedly connected to both sides of the outer wall of the second rotating rod (7). The drive gear (6) and driven gear (8) on the front side of the air flotation machine (1) and the drive gear (6) and driven gear (8) on the rear side of the air flotation machine (1) are each a group. The two chains (9) are respectively sleeved on each group of drive gears (6) and driven gears (8).

4. The air flotation device for wastewater treatment according to claim 1, characterized in that: The scraping mechanism includes two scrapers (11), and two mounting plates (10) are fixedly connected between the two chains (9). The two mounting plates (10) are arranged around the chain (9). One side of each scraper (11) is fixedly connected to one side of each mounting plate (10). Both ends of the scraper (11) are provided with mounting grooves (12). Several support springs (13) are fixedly connected to the inner wall of the mounting grooves (12). The several support springs (13) are arranged linearly and equidistantly. One end of each set of support springs (13) is fixedly connected to the same moving plate (14). One side of the moving plate (14) is fixedly connected to a connecting plate (15). One side of the connecting plate (15) is fixedly connected to an airbag (16). A diaphragm (17) is sleeved on the outside of the moving plate (14). One side of each of the two diaphragms (17) is fixedly connected to both ends of the scraper (11), and the other side is fixedly connected to one side of each of the two connecting plates (15).

5. The air flotation device for wastewater treatment according to claim 1, characterized in that: The guiding mechanism includes two guide plates (18), one side of which is fixedly connected to the top of both sides of the air flotation cavity, and the right side of each guide plate (18) is provided with a guide groove (20).

6. The air flotation device for wastewater treatment according to claim 5, characterized in that: The top surfaces of both guide plates (18) are configured as arc-shaped surfaces that bulge outward from the air flotation machine (1).

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