Sewage treatment air flotation system
By introducing sewage pipeline reflux and overflow partition filtration into the sewage treatment flotation system, the problems of sedimentation and overflow blockage are solved, automatic separation and efficient water purification are achieved, and the system's operating stability and water quality are improved.
Patent Information
- Application Number
- CN202422537722.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-10-21
AI Technical Summary
In existing sewage treatment flotation systems, sediment needs to be manually cleaned after settling at the bottom of the pool, and the overflow method has problems of blockage and rising water levels.
A sewage treatment flotation system was designed, including a flotation tank, a pressure dissolved air tank, a pressure pump and a chemical pipeline. A scraper mechanism, a slope and an overflow partition were set up. The sediment was returned through the sewage pipeline and separated by pressure filtration. The overflow partition was used for filtration to form a flotation area, an intermediate tank and a clean water area, realizing automatic separation of sediment and efficient filtration of clean water.
It effectively prevents sediment from settling at the bottom of the pool, improves water purification efficiency, reduces the frequency of manual cleaning, avoids clogging of overflow baffles, and improves water quality and drainage volume.
Smart Images
Figure CN223397503U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sewage treatment equipment, in particular to a sewage treatment flotation system and a sewage treatment pool. Background Art
[0002] Flotation machine is a water treatment equipment that produces a large number of fine bubbles in the water by the dissolved air system, so that the air is attached to the suspended particles in the form of highly dispersed tiny bubbles, resulting in a state with a density lower than that of water. The buoyancy principle is used to make the air float on the water surface, thereby achieving solid-liquid separation. Flotation machine is divided into super-efficient shallow flotation machine, vortex flotation machine, and horizontal flow flotation machine. It is used in water supply, industrial wastewater and municipal sewage treatment. The advantage of flotation machine is that it is a solid-liquid separation equipment with low investment, extremely small floor space, high degree of automation, and easy operation and management.
[0003] During the sewage treatment process, lightweight solids float up under the action of bubbles, while some solids with a weight greater than the buoyancy will settle. After sedimentation occurs at the bottom of the pool, manual cleaning is required on a regular basis to discharge the sediment. At the same time, the current flotation pool usually overflows into a clean water reservoir after flotation separation. This method still has room for improvement. For this reason, this application is proposed to further improve the existing flotation system for sewage treatment. Utility Model Content
[0004] The purpose of the present utility model is to provide a sewage treatment flotation system to solve the problems raised in the above background technology.
[0005] To achieve the above purpose, the present invention provides the following technical solutions:
[0006] A sewage treatment flotation system includes a flotation tank, a pressure dissolved air tank, a pressure pump, and a reagent pipeline. A scraper mechanism is provided on the top of the flotation tank. The pressure dissolved air tank is connected to the flotation tank through a sewage input pipeline. The reagent pipeline and the sewage raw water pipeline are connected to the pressure dissolved air tank through a pressure pump and a delivery pipeline. The delivery pipeline is also connected to a high-pressure gas source pipeline.
[0007] The bottom of the flotation tank is connected to the filter press through a sewage pipeline. The solid material of the filter press is sent out for treatment through the discharge pipe, and the sewage is sent back to the sewage raw water pipeline for circulation treatment through the return pipeline.
[0008] As a further solution of the present invention: a slope and an overflow baffle are provided in the flotation tank. The flotation tank is divided into three areas by the slope and the overflow baffle, namely the flotation area, the intermediate tank and the clean water area. The sewage output from the sewage input pipeline enters the intermediate tank through the flotation area and finally overflows into the clean water area.
[0009] As a further solution of the present invention: the slope located on one side of the middle pool is a slope with a slope of more than 40%. The bottom of the slope is close to the overflow baffle to form a sediment collection area, and the sewage pipeline is connected to the sediment collection area.
[0010] As a further solution of the present invention: the overflow partition is a wall with the function of infiltration and filtration of sewage.
[0011] As a further solution of the present invention: a slag trough is provided in the flotation tank, and the slag trough is located at the end of the scraper mechanism.
[0012] As a further solution of the present invention: the water purification area is connected to a drainage pipeline and is provided with a valve body to control drainage.
[0013] As a further solution of the present invention: the return line is further provided with a branch pipe connected to the bottom of the flotation zone.
[0014] Compared with the prior art, the beneficial effects of the present invention are:
[0015] 1. The sewage treatment flotation system accelerates the water flow in the lower part of the flotation pool through the sewage pipeline backflow, prevents the sediment from settling, and sends it out for filter press to separate the sediment and sewage. The sewage is returned and the sediment is sent for treatment, thereby reducing the sedimentation in the lower part of the pool.
[0016] 2. The sewage treatment flotation system improves the water purification efficiency by filtering through the overflow baffle. At the same time, the overflow meets the drainage volume, achieving 60%-70% through filtration and 40%-30% overflow, avoiding the overflow baffle clogging affecting the drainage volume and causing the water level to rise, while improving the water quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a structural diagram of a sewage treatment flotation system.
[0018] In the figure: 1. Flotation tank; 2. Pressure dissolved air tank; 3. Pressure pump; 4. Sewage raw water pipeline; 5. Chemical pipeline; 6. High-pressure gas source pipeline; 7. Delivery pipeline; 8. Pressure relief pipeline; 9. Sewage input pipeline; 10. Flotation area; 11. Scraper mechanism; 12. Slope; 13. Slag trough; 14. Overflow baffle; 15. Water purification area; 16. Drainage pipeline; 17. Filter press; 18. Sewage pipeline; 19. Discharge pipe; 20. Circulation pump; 21. Return pipeline. DETAILED DESCRIPTION
[0019] See also Figure 1In an embodiment of the present invention, a sewage treatment flotation system includes a flotation tank, a pressure dissolved air tank, a pressure pump, and a reagent pipeline. A pressure relief pipeline 8 is provided on the top of the pressure dissolved air tank 2 to appropriately release the pressure in the tank when the internal air pressure is too high. A scraper mechanism 11 is provided on the top of the flotation tank 1. The pressure dissolved air tank 2 is connected to the flotation tank 1 through a sewage input pipeline 9. The reagent pipeline 5 and the sewage raw water pipeline 4 are connected to the pressure dissolved air tank 2 through a pressure pump 3 and a delivery pipeline 7. The delivery pipeline 7 is also connected to a high-pressure gas source pipeline 6.
[0020] The bottom of the flotation tank 1 is connected to the filter press 17 through a sewage pipe 18. The solid material of the filter press 17 is sent out for treatment through the discharge pipe 19, and the sewage is sent back to the sewage raw water pipeline 4 for circulation treatment through the return pipe 21. The sewage in the return pipe 21 is circulated by the circulation pump 21. The water purification area 15 is connected to the drainage pipe 16 and is provided with a valve body to control drainage. In the past, water circulation was achieved by connecting a pipe outside the drainage pipe 16 to the sewage raw water pipeline 4 for circulation. The recycled sewage was oxygenated and pumped into the flotation tank 1 for flotation. Through technical improvements, the sewage pipe 18 used for circulation is connected to the bottom of the flotation tank 1, so that a large amount of sediment at the bottom of the flotation tank 1 flows into the sewage pipe 18 together with the sewage before it is completely settled, thereby preventing the sediment from settling at the bottom of the tank. After recovery, the sewage containing a large amount of sediment will be filtered through the filter press 17 to separate the sediment and process it. The wastewater is returned for use through the return pipe 21, thereby solving the problem of sedimentation at the bottom of the tank.
[0021] In a preferred embodiment, a slope 12 and an overflow baffle 14 are provided in the flotation tank 1. The flotation tank 1 is divided into three areas by the slope 12 and the overflow baffle 14, namely, a flotation area 10, an intermediate tank and a clean water area 15. The sewage output from the sewage input pipeline 9 enters the intermediate tank through the flotation area 10 and finally overflows into the clean water area 15.
[0022] In a preferred embodiment, the slope 12 is located on one side of the middle pool and is a slope with a slope of more than 40%. The bottom of the slope 12 is close to the overflow baffle 14 to form a sediment collection area, and the sewage pipeline 18 is connected to the sediment collection area. The existence of the slope 12 is to better promote the accumulation of impurities in the water flow and reduce precipitation on the slope surface when the water flows at the bottom.
[0023] In a preferred embodiment, the overflow baffle 14 is a wall with a sewage filtration function. The overflow baffle 14 can be formed by pulling two layers of fine mesh and matching the stainless steel column. The interlayer between the fine mesh is filled with quartz sand and fine sand for filtration treatment. Impurities in the sewage are blocked by filtration, achieving a purification effect and improving the pass rate. The filtration efficiency of the overflow baffle 14 is lower than the efficiency of the sewage input pipeline 9 in transporting sewage to the flotation tank 1, avoiding the water level being too low and the scraper mechanism 11 being ineffective. The sewage input pipeline 9 stops supplying water, the sewage pipeline 18 continues to pump water, the water level in the intermediate pool is lowered, and the clean water in the clean water area 15 flows back, reverse osmosis is performed from the overflow baffle 14, the filtered material is cleaned, and the filtered material is discharged from the sewage pipeline 18 by pressure filtration, thereby cleaning the overflow baffle 14.
[0024] In a preferred embodiment, a slag trough 13 is provided in the flotation tank 1 , and the slag trough 13 is located at the end of the scraper mechanism 11 .
[0025] In a preferred embodiment, the return line 21 is further provided with a branch pipe connected to the bottom of the flotation zone 10. The return flow has two modes of utilization: one is to return to the sewage raw water pipeline 4, and to start flotation sewage treatment through dissolved air at the source of the process; the other is to control the water circulation into the flotation zone 10 to realize internal circulation and reduce the operating pressure of the dissolved air equipment by adjusting the valve on the pipeline.
[0026] It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has its own focus. For any details not described in individual embodiments, reference may be made to the description in other embodiments.
[0027] The above-described embodiments merely represent implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.
Claims
1. A sewage treatment flotation system, comprising a flotation tank (1), a pressure-dissolving gas tank (2), a pressure pump (3), and a reagent pipeline (5), wherein a scraper mechanism (11) is provided on the top of the flotation tank (1), and the pressure-dissolving gas tank (2) is connected to the flotation tank (1) via a sewage input pipeline (9), characterized in that: The pharmaceutical pipeline (5) and the sewage raw water pipeline (4) are connected to the pressure dissolved gas tank (2) via a pressure pump (3) and a delivery pipeline (7), and the delivery pipeline (7) is also connected to a high-pressure gas source pipeline (6); The bottom of the flotation tank (1) is connected to the filter press (17) through a sewage discharge pipeline (18). The solid material of the filter press (17) is sent out for treatment through a discharge pipe (19), and the sewage is sent back to the sewage raw water pipeline (4) through a return pipeline (21) for circulation treatment.
2. A sewage treatment flotation system according to claim 1, characterized in that: The flotation tank (1) is provided with a slope (12) and an overflow baffle (14). The flotation tank (1) is divided into three areas by the slope (12) and the overflow baffle (14), namely, the flotation area (10), the intermediate tank and the clean water area (15). The sewage output from the sewage input pipeline (9) enters the intermediate tank through the flotation area (10) and finally overflows into the clean water area (15).
3. A sewage treatment flotation system according to claim 2, characterized in that: The slope (12) is located on one side of the middle pool and is a slope with a slope of more than 40%. The bottom of the slope (12) is close to the overflow baffle (14) to form a sediment collection area, and the sewage pipeline (18) is connected to the sediment collection area.
4. A sewage treatment flotation system according to claim 2 or 3, characterized in that: The overflow partition (14) is a wall having a sewage permeation and filtering function.
5. The sewage treatment flotation system according to claim 1, characterized in that: A slag trough (13) is provided in the flotation tank (1), and the slag trough (13) is located at the end of the scraper mechanism (11).
6. A sewage treatment flotation system according to claim 2, characterized in that: The water purification area (15) is connected to a drainage pipeline (16) and is provided with a valve body to control drainage.
7. A sewage treatment flotation system according to claim 2, characterized in that: The return line (21) is further provided with a branch pipe connected to the bottom of the flotation zone (10).