Sedimentation tank for sewage treatment

Abstract

The utility model discloses a sedimentation tank for sewage treatment, and relates to the technical field of sewage treatment. Comprising a sedimentation tank main body, a first-stage sedimentation tank and a second-stage sedimentation tank are sequentially arranged in the sedimentation tank main body, a horizontal flow opening is formed between the first-stage sedimentation tank and the second-stage sedimentation tank, a sewage suction pipe is laid at the horizontal flow opening, and sewage outlets are formed in the bottoms of the first-stage sedimentation tank and the second-stage sedimentation tank. According to the sedimentation tank for sewage treatment, the conical dome is arranged at the bottom end of the primary sedimentation tank and the bottom end of the secondary sedimentation tank, the silt discharge ports are distributed in the edges of the conical dome, the sludge scraping paddles at the bottoms of the tanks are driven to scrape deposited silt at a low speed through driving of the variable frequency motor, and the silt sinks to the sewage discharge port in the bottom of the sedimentation tank to be collected and pumped out through the silt suction pipe; the suspended matter cleaning paddle on the upper layer rotates at a low speed to push suspended matters on the water surface to approach the sewage suction pipe in the middle, and the suspended matters are sucked and discharged by the sewage suction pipe, so that the suction effect on sediments is enhanced, and the sewage treatment effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sedimentation tank for treating sewage. Background Art

[0002] The sedimentation reaction tank is an indispensable infrastructure in the sewage treatment process. It uses the effect of gravity to automatically settle the suspended matter in the water, thereby removing the suspended matter in the water. However, after long-term use, a large amount of dirt will remain at the bottom of the sedimentation reaction tank, and silt will accumulate. In order to keep the sedimentation reaction tank clean and the water treatment quality, the inside of the sedimentation reaction tank needs to be cleaned regularly.

[0003] Since the floating and sinking objects in the sewage are evenly dispersed in the sewage and deposited, when there is a lot of sludge, these floating and sinking objects sink to various areas scattered at the bottom of the pool, and the sludge discharge pipe often only extracts the sludge in local positions. Therefore, when discharging the sludge, there will still be some sludge remaining, which requires secondary extraction, which is time-consuming and labor-intensive. Utility Model Content

[0004] The utility model provides a sedimentation tank for treating sewage to solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sedimentation tank for treating sewage, comprising a sedimentation tank main body, wherein a primary sedimentation tank and a secondary sedimentation tank are sequentially arranged in the sedimentation tank main body, and a horizontal flow port is arranged between the primary sedimentation tank and the secondary sedimentation tank, a sewage suction pipe is laid at the horizontal flow port, a sewage outlet is arranged at the bottom of the primary sedimentation tank and the secondary sedimentation tank, and a sludge suction pipe is connected through the sewage outlet, a conical dome is arranged at the inner bottom end of the primary sedimentation tank and the secondary sedimentation tank, and a silt discharge port is arranged at the edge of the conical dome, a stirring shaft is installed in the primary sedimentation tank and the secondary sedimentation tank through a bearing, and a mud scraper paddle is arranged at the bottom of the stirring shaft, and a suspended matter cleaning paddle is arranged at the upper end thereof, a variable frequency motor is mounted on the top of the sedimentation tank main body, and the output shaft end of the variable frequency motor is connected to a transmission shaft through a coupling, and the transmission shaft is respectively connected to the stirring shafts in the primary sedimentation tank and the secondary sedimentation tank through a synchronous toothed belt.

[0006] Furthermore, a water inlet is provided on the side wall of the primary sedimentation tank, and a water outlet is provided on the side wall of the secondary sedimentation tank.

[0007] Furthermore, the sewage outlet is connected to the mud suction pipe flange, and a butterfly valve is installed at the sewage outlet.

[0008] Furthermore, the sewage suction pipe is located between two of the suspended matter cleaning paddles, and one end of the sewage suction pipe extends outward from the sedimentation tank body.

[0009] Furthermore, the scraper blade is adapted to the cross-sectional shape of the conical dome and is in contact with the conical dome.

[0010] Furthermore, a support is installed on the top of the sedimentation tank body, and the variable frequency motor is fixed on the support.

[0011] Compared with the prior art, the utility model provides a sedimentation tank for treating sewage, which has the following

[0012] Beneficial effects:

[0013] The sedimentation tank for treating sewage is provided with a conical dome at the bottom end of the primary sedimentation tank and the secondary sedimentation tank, and silt discharge ports are distributed at the edges. The sludge scraper at the bottom of the tank is driven by a variable frequency motor to slowly scrape off the deposited sludge, so that the sludge sinks to the discharge port at the bottom of the sedimentation tank and is collected and pumped out through the sludge suction pipe. At the same time, the suspended matter cleaning paddle on the upper layer rotates slowly, pushing the suspended matter on the water surface to approach the sewage suction pipe in the middle, and is sucked out through the sewage suction pipe, thereby enhancing the sediment extraction effect and improving the sewage treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a top view of the utility model;

[0016] Figure 3 It is a partial top view of the utility model.

[0017] In the figure: 1. Sedimentation tank body; 2. Primary sedimentation tank; 3. Secondary sedimentation tank; 4. Horizontal flow port; 5. Sewage suction pipe; 6. Sewage outlet; 7. Mud suction pipe; 8. Conical dome; 9. Silt outlet; 10. Agitator shaft; 11. Mud scraper paddle; 12. Suspended matter cleaning paddle; 13. Variable frequency motor; 14. Drive shaft; 15. Water inlet; 16. Water outlet; 17. Butterfly valve; 18. Support. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-Figure 3The utility model discloses a sedimentation tank for treating sewage, including a sedimentation tank body 1, wherein a primary sedimentation tank 2 and a secondary sedimentation tank 3 are sequentially arranged in the sedimentation tank body 1, and an advection port 4 is arranged between the primary sedimentation tank 2 and the secondary sedimentation tank 3, a sewage suction pipe 5 is laid at the advection port 4, a sewage discharge port 6 is arranged at the bottom of the primary sedimentation tank 2 and the secondary sedimentation tank 3, and a sludge suction pipe 7 is connected through the sewage discharge port 6, a conical dome 8 is arranged at the inner bottom end of the primary sedimentation tank 2 and the secondary sedimentation tank 3, and a sludge discharge port 9 is arranged at the edge of the conical dome 8, a stirring shaft 10 is installed in the primary sedimentation tank 2 and the secondary sedimentation tank 3 through a bearing, and a mud scraping paddle 11 is arranged at the bottom end of the stirring shaft 10, and a suspended matter cleaning paddle 12 is arranged at the upper end thereof, and a mud scraping paddle 11 is arranged at the bottom end of the stirring shaft 10, and a suspended matter cleaning paddle 12 is arranged at the upper end thereof, and a mud scraping paddle 11 is arranged at the bottom end of the stirring shaft 10, and a mud scraping paddle 11 is arranged at the upper end thereof, and a mud scraping paddle 12 is arranged at the upper end thereof ... A conical dome 8 is provided at the bottom end of the first-stage sedimentation tank 3, and a silt discharge port 9 is distributed at its edge. The scraper paddle 11 at the bottom of the tank is driven by a variable frequency motor 13 to slowly scrape off the deposited silt, so that the silt sinks to the sewage discharge port 6 at the bottom of the sedimentation tank and is collected and pumped out through the sludge suction pipe 7. At the same time, the upper suspended matter cleaning paddle 12 rotates slowly to push the suspended matter on the water surface to approach the sewage suction pipe 5 in the middle, and is sucked out through the sewage suction pipe 5, thereby enhancing the extraction effect of the sediment and improving the sewage treatment effect. A variable frequency motor 13 is mounted on the top of the sedimentation tank body 1, and the output shaft end of the variable frequency motor 13 is connected to a transmission shaft 14 through a coupling. The transmission shaft 14 is respectively connected to the stirring shaft 10 in the first-stage sedimentation tank 2 and the second-stage sedimentation tank 3 through a synchronous toothed belt.

[0020] Specifically, a water inlet 15 is provided on the side wall of the primary sedimentation tank 2 , and a water outlet 16 is provided on the side wall of the secondary sedimentation tank 3 .

[0021] In this embodiment, sewage is introduced from the water inlet 15, and after sedimentation treatment, it is discharged from the water outlet 16 to proceed to the next treatment process.

[0022] Specifically, the sewage outlet 6 is flange-connected to the mud suction pipe 7 , and a butterfly valve 17 is installed at the sewage outlet 6 .

[0023] In this embodiment, the butterfly valve 17 is a regulating valve with a simple structure, which is mainly used for the on-off control of low-pressure pipeline media. The closing member of the butterfly valve 17 is in the shape of a disc and rotates around the valve axis to achieve the purpose of opening or closing.

[0024] Specifically, the sewage suction pipe 5 is located between two of the suspended matter cleaning paddles 12 , and one end of the sewage suction pipe 5 extends outward from the sedimentation tank body 1 .

[0025] In this embodiment, the suspended matter cleaning paddle 12 at the upper layer rotates slowly to push the suspended matter on the water surface toward the sewage suction pipe 5 in the middle, and is sucked out through the sewage suction pipe 5.

[0026] Specifically, the scraper paddle 11 is adapted to the cross-sectional shape of the conical dome 8 and is in contact with the conical dome 8 .

[0027] In this embodiment, the variable frequency motor 13 is driven to drive the scraper paddle 11 at the bottom of the tank to slowly scrape away the deposited sludge, so that the sludge sinks to the sewage outlet 6 at the bottom of the sedimentation tank and is collected.

[0028] Specifically, a support 18 is installed on the top of the sedimentation tank body 1 , and the variable frequency motor 13 is fixed on the support 18 .

[0029] In this embodiment, the support 18 is a supporting structure used for installing and fixing the variable frequency motor 13 .

[0030] When in use, a conical dome 8 is provided at the bottom end of the primary sedimentation tank 2 and the secondary sedimentation tank 3, and silt discharge ports 9 are distributed at the edges thereof. The frequency conversion motor 13 drives the scraper paddle 11 at the bottom of the tank to slowly scrape away the deposited silt, so that the silt sinks to the sewage discharge port 6 at the bottom of the sedimentation tank and is collected and pumped out through the sludge suction pipe 7. At the same time, the upper suspended matter cleaning paddle 12 rotates slowly to push the suspended matter on the water surface to approach the sewage suction pipe 5 in the middle, and is sucked out through the sewage suction pipe 5, thereby enhancing the sediment extraction effect and improving the sewage treatment effect.

[0031] In summary, the sedimentation tank for treating sewage is provided with a conical dome 8 at the bottom end of the primary sedimentation tank 2 and the secondary sedimentation tank 3, and silt discharge ports 9 are distributed at the edges thereof. The frequency conversion motor 13 drives the scraper paddle 11 at the bottom of the tank to slowly scrape away the deposited silt, so that the silt sinks to the sewage discharge port 6 at the bottom of the sedimentation tank and is collected and pumped out through the sludge suction pipe 7. At the same time, the upper suspended matter cleaning paddle 12 rotates slowly to push the suspended matter on the water surface to approach the sewage suction pipe 5 in the middle, and is sucked out through the sewage suction pipe 5, thereby enhancing the sediment extraction effect and improving the sewage treatment effect.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sedimentation tank for treating sewage, comprising a sedimentation tank body (1), characterized in that: The sedimentation tank body (1) is provided with a primary sedimentation tank (2) and a secondary sedimentation tank (3) in sequence, and an advection port (4) is provided between the primary sedimentation tank (2) and the secondary sedimentation tank (3), a sewage suction pipe (5) is laid at the advection port (4), a sewage discharge port (6) is provided at the bottom of the primary sedimentation tank (2) and the secondary sedimentation tank (3), and a sludge suction pipe (7) is connected through the sewage discharge port (6), and a conical dome (8) is provided at the inner bottom end of the primary sedimentation tank (2) and the secondary sedimentation tank (3), and a sludge discharge port is provided at the edge of the conical dome (8). (9), a stirring shaft (10) is installed in the primary sedimentation tank (2) and the secondary sedimentation tank (3) through bearings, and a mud scraper (11) is arranged at the bottom end of the stirring shaft (10), and a suspended matter cleaning paddle (12) is arranged at the upper end thereof, and a variable frequency motor (13) is mounted on the top of the sedimentation tank body (1), and the output shaft end of the variable frequency motor (13) is connected to a transmission shaft (14) through a coupling, and the transmission shaft (14) is respectively connected to the stirring shaft (10) in the primary sedimentation tank (2) and the secondary sedimentation tank (3) through a synchronous toothed belt.

2. A sedimentation tank for treating sewage according to claim 1, characterized in that: A water inlet (15) is provided on the side wall of the primary sedimentation tank (2), and a water outlet (16) is provided on the side wall of the secondary sedimentation tank (3).

3. A sedimentation tank for treating sewage according to claim 1, characterized in that: The sewage outlet (6) is flange-connected to the mud suction pipe (7), and a butterfly valve (17) is installed at the sewage outlet (6).

4. A sedimentation tank for treating sewage according to claim 1, characterized in that: The sewage suction pipe (5) is located between two of the suspended matter cleaning paddles (12), and one end of the sewage suction pipe (5) extends outward from the sedimentation tank body (1).

5. A sedimentation tank for treating sewage according to claim 1, characterized in that: The scraper blade (11) is adapted to the cross-sectional shape of the conical dome (8) and is in contact with the conical dome (8).

6. A sedimentation tank for treating sewage according to claim 1, characterized in that: A support (18) is installed on the top of the sedimentation tank body (1), and the variable frequency motor (13) is fixed on the support (18).

Images