Post-denitrification anoxic tank

Abstract

The utility model discloses a post-denitrification anoxic tank which comprises an anoxic tank, a feeding pipe and a bubble generator, a cover plate is arranged at the top of the anoxic tank, supporting legs are connected to the top of the cover plate, and a feeding frame is arranged at the tops of the supporting legs; the feeding pipe is arranged at the bottom of the charging frame, and the bottom of the feeding pipe penetrates through the cover plate and then extends into the anoxic tank; the L-shaped plate is driven by the output end of the air cylinder to move in the feeding pipe, so that a chemical agent on the surface of the L-shaped plate flows downwards from the interior of the through hole, and the chemical agent flows to the interior of the anoxic tank; through retraction of an air cylinder, a through hole in the surface of an L-shaped plate and a feeding pipe are staggered, so that the chemical agent is prevented from flowing from the interior of the through hole, and the chemical agent is controlled; by starting the bubble generator, bubbles enter the anoxic tank and are matched with the motor, the rotating rod and the stirring rod to rotate, and the stirring rod stirs chemical agents and the bubbles in sewage, so that gas transmission and dissolution can be promoted.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a post-denitrification anoxic pool. Background Art

[0002] The post-nitrogen anoxic tank is an environmental engineering facility used to treat sewage, mainly used to remove nitrogen from sewage. It is usually used in the secondary biological treatment process of sewage treatment plants. During the denitrification process, the sewage first passes through a biochemical treatment unit (such as the activated sludge process) for the biodegradation of organic matter and the oxidation of nitrogen ammonia to form nitrite. After that, the sewage enters the post-nitrogen removal anoxic tank, which is a link for the denitrification process using nitrite as an electron acceptor. In the post-nitrogen removal anoxic tank, due to the control of oxygen supply conditions, there is usually less oxygen in the sewage, which can encourage bacteria to use nitrite as an electron acceptor instead of oxygen to degrade nitrate. This denitrification process converts nitrite into nitrogen gas, thereby achieving nitrogen removal.

[0003] In the related art, a scheme of a denitrification agent adding device for a sewage treatment tank (Announcement No.: CN216005432U) was found through searching. When in use, by adding chemical agents into the water reservoir, the chemical agents need to be placed in the agent box first. A conduit is connected to the bottom of the agent box. The rate at which the agent enters the water reservoir is adjusted by adjusting the valve arranged outside the conduit. The lower end of the conduit is mounted inside the rotating rod, and the conduit has no direct contact with the rotating rod. The chemical agent is injected into the rotating rod through the conduit. Due to the centrifugal force generated by the rotation of the rotating rod, the chemical agent retained in the rotating rod moves to the inside of the cross bar outside the rotating rod, and is evenly dispersed into the water reservoir through the openings arranged outside the cross bar. The rotating rod stirs the sewage in the water reservoir while evenly dispersing the chemical agent into the water reservoir, thereby increasing the chemical reaction rate in the water reservoir and thus improving the sewage treatment efficiency.

[0004] However, when the chemical agent flows downward, since the chemical agent is not controlled, the chemical agent may be blocked when it continues to flow downward, so that the chemical agent cannot enter the water tank. When the conduit is blocked, the staff needs to manually clear it, which is time-consuming and laborious, and increases the labor intensity of the staff. In view of this, we have introduced a post-denitrification anoxic tank. Utility Model Content

[0005] The purpose of the utility model is to provide a post-denitrification anoxic pool to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a post-denitrification anoxic tank, comprising: an anoxic tank, a feed pipe and a bubble generator;

[0007] A cover plate is provided on the top of the anoxic tank, a support leg is connected to the top of the cover plate, and a feeding frame is provided on the top of the support leg;

[0008] The feed pipe is arranged at the bottom of the feeding frame, the bottom of the feed pipe penetrates the cover plate and extends to the inside of the anoxic tank, the inner wall of the feed pipe is provided with a scraper plate, and the scraper plate and the feed pipe are welded;

[0009] The bubble generator is arranged on one side of the anoxic pool, one side of the bubble generator is connected with a pipe, the pipe extends to the inside of the anoxic pool, and air holes are opened at equal intervals on the surface of the pipe. When the bubble generator is working, the bubbles generated by the bubble generator are discharged into the inside of the anoxic pool through the pipe and the air holes;

[0010] A material control mechanism is arranged on one side of the feed pipe, and the cylinder of the material control mechanism drives the L-shaped plate to move so that the through holes on the surface of the L-shaped plate enter the interior of the feed pipe for material control.

[0011] Preferably, the material control mechanism includes a limit rod arranged on one side of the feed pipe, the limit rod and the feed pipe are welded, the L-shaped plate is slidably connected to the inside of the feed pipe, and the inside of the feed pipe is located at the upper and lower ends of the L-shaped plate and is connected with a sealing gasket, the sealing gasket can seal the gap between the feed pipe and the L-shaped plate, the through hole is opened on the surface of the L-shaped plate, the through hole facilitates the flow of chemicals, and the bottom of the scraper plate is connected to the surface of the L-shaped plate, the scraper plate can scrape the chemicals on the surface of the L-shaped plate, the limit rod passes through the L-shaped plate, the cylinder is connected to the top of the cover plate, the output end of the cylinder is connected to one side of the L-shaped plate, the cylinder can drive the L-shaped plate to move left and right to make the L-shaped plate reciprocate.

[0012] Preferably, a liquid inlet pipe is provided on one side of the anoxic tank, and the setting of the liquid inlet pipe allows external sewage to enter the interior of the anoxic tank. A liquid outlet pipe is provided on one side of the anoxic tank below the liquid inlet pipe, and the setting of the liquid outlet pipe can discharge the treated sewage inside the anoxic tank.

[0013] Preferably, a motor is connected to the other side of the anoxic tank, a rotating rod is connected to the output end of the motor, and stirring rods are connected to the surface of the rotating rod at equal intervals. When the motor is started, the motor will drive the rotating rod and the stirring rod to rotate, thereby stirring the sewage inside the anoxic tank.

[0014] Preferably, an observation window is connected to the surface of the anoxic pool, and the setting of the observation window can better observe the working status inside the anoxic pool.

[0015] Preferably, the limiting rod passes through the L-shaped plate and is connected to the limiting plate. The provision of the limiting plate can better prevent the L-shaped plate from being separated from the surface of the limiting rod.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] (1) The output end of the cylinder drives the L-shaped plate to move inside the feed pipe, so that the chemical agent on the surface of the L-shaped plate flows downward from the inside of the through hole, allowing the chemical agent to flow into the anoxic tank. At the same time, the scraper plate can scrape the chemical agent on the surface of the L-shaped plate, and the sealing gasket can be used to seal the movement of the L-shaped plate, thereby preventing the chemical agent from flowing out of the feed pipe.

[0018] (2) After a certain amount of chemical enters the feed pipe, the cylinder retracts, so that the through hole on the surface of the L-shaped plate is offset from the feed pipe, thereby preventing the chemical from continuing to flow from the inside of the through hole, controlling the chemical, and avoiding adding more chemical, thereby avoiding clogging the feed pipe;

[0019] (3) By starting the bubble generator, the bubble generator discharges bubbles into the anoxic pool through the pipe and the air hole, and the motor is started to control the rotation of the rotating rod and the stirring rod, so that the stirring rod can stir the chemical agents and bubbles in the sewage to promote gas transfer and dissolution, and increase the efficiency of the denitrification reaction, so as to better treat the sewage and make it more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the feed pipe of the utility model in side section;

[0022] Figure 3 This is a structural schematic diagram of the material control mechanism of the utility model;

[0023] Figure 4 It is a schematic structural diagram of the utility model in three-dimensional form.

[0024] In the figure: 1. anoxic tank; 2. motor; 3. bubble generator; 4. pipeline; 5. air hole; 6. rotating rod; 7. stirring rod; 8. cylinder; 9. supporting leg; 10. feeding frame; 11. feeding pipe; 12. liquid inlet pipe; 13. liquid outlet pipe; 14. scraper plate; 15. L-shaped plate; 16. limit plate; 17. limit rod; 19. through hole; 20. sealing gasket; 21. observation window; 22. cover plate. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figure 1-4 The utility model provides a technical solution: a post-denitrification anoxic tank, comprising: an anoxic tank 1, a cover plate 22 is arranged on the top of the anoxic tank 1, a support leg 9 is connected to the top of the cover plate 22, and a feeding frame 10 is arranged on the top of the support leg 9;

[0027] A feed pipe 11, the feed pipe 11 is arranged at the bottom of the feed frame 10, the bottom of the feed pipe 11 passes through the cover plate 22 and extends to the inside of the anoxic tank 1, the inner side wall of the feed pipe 11 is provided with a scraper plate 14, and the scraper plate 14 and the feed pipe 11 are welded;

[0028] A bubble generator 3 is provided on one side of the anoxic pool 1. A pipe 4 is connected to one side of the bubble generator 3. The pipe 4 extends to the inside of the anoxic pool 1. Air holes 5 are provided at equal intervals on the surface of the pipe 4. When the bubble generator 3 is working, the bubbles generated by the bubble generator 3 are discharged into the inside of the anoxic pool 1 through the pipe 4 and the air holes 5.

[0029] A material control mechanism is provided on one side of the feed pipe 11, and the cylinder 8 of the material control mechanism drives the L-shaped plate 15 to move so that the through hole 19 on the surface of the L-shaped plate 15 enters into the feed pipe 11 for material control.

[0030] The material control mechanism includes a limit rod 17 arranged on one side of the feed pipe 11, and the limit rod 17 and the feed pipe 11 are welded. The L-shaped plate 15 is slidably connected to the inside of the feed pipe 11, and the upper and lower ends of the L-shaped plate 15 inside the feed pipe 11 are connected with sealing gaskets 20. The setting of the sealing gasket 20 can seal the gap between the feed pipe 11 and the L-shaped plate 15. The through hole 19 is opened on the surface of the L-shaped plate 15, and the through hole 19 is convenient for the circulation of chemical agents. The bottom of the scraper plate 14 is connected to the surface of the L-shaped plate 15, and the setting of the scraper plate 14 can scrape the chemical agents on the surface of the L-shaped plate 15. The limit rod 17 passes through the L-shaped plate 15, and the cylinder 8 is connected to the top of the cover plate 22. The output end of the cylinder 8 is connected to one side of the L-shaped plate 15. The cylinder 8 can drive the L-shaped plate 15 to move left and right to make the L-shaped plate 15 reciprocate.

[0031] A liquid inlet pipe 12 is provided on one side of the anoxic tank 1. The setting of the liquid inlet pipe 12 allows external sewage to enter the interior of the anoxic tank 1. A liquid outlet pipe 13 is provided on one side of the anoxic tank 1 below the liquid inlet pipe 12. The setting of the liquid outlet pipe 13 can discharge the treated sewage inside the anoxic tank 1.

[0032] A motor 2 is connected to the other side of the anoxic pool 1, and a rotating rod 6 is connected to the output end of the motor 2. Stirring rods 7 are evenly spaced and connected to the surface of the rotating rod 6. When the motor 2 is started, the motor 2 will drive the rotating rod 6 and the stirring rod 7 to rotate, thereby stirring the sewage inside the anoxic pool 1.

[0033] An observation window 21 is connected to the surface of the anoxic pool 1 . The setting of the observation window 21 can better observe the working status inside the anoxic pool 1 .

[0034] The limiting rod 17 penetrates through the L-shaped plate 15 and is connected to the limiting plate 16 . The setting of the limiting plate 16 can better prevent the L-shaped plate 15 from being separated from the surface of the limiting rod 17 .

[0035] Specifically, when in use, the sewage is discharged into the anoxic tank 1 through the liquid inlet pipe 12, and the sewage is stored in the anoxic tank 1. At this time, the chemical agent in the feeding frame 10 will flow to the inside of the feeding pipe 11, and the chemical agent will accumulate on the top of the L-shaped plate 15, thereby storing a certain amount of chemical agents. Then, the cylinder 8 is started, and the output end of the cylinder 8 drives the L-shaped plate 15 to move inside the feeding pipe 11, so that the chemical agent on the surface of the L-shaped plate 15 flows downward from the inside of the through hole 19, and the chemical agent flows to the inside of the anoxic tank 1. At the same time, the scraper plate 14 can scrape the chemical agent on the surface of the L-shaped plate 15, and the sealing gasket 20 can be used to seal the movement of the L-shaped plate 15, thereby preventing the chemical agent from flowing out of the inside of the feeding pipe 11.

[0036] After a certain amount of chemical agent enters the inside of the feed pipe 11, the cylinder 8 retracts, allowing the output end of the cylinder 8 to drive the L-shaped plate 15 to move to the initial position, so that the through hole 19 on the surface of the L-shaped plate 15 is staggered with the feed pipe 11, thereby preventing the chemical agent from continuing to flow from the inside of the through hole 19, controlling the chemical agent, and preventing more chemical agent from being added. When the L-shaped plate 15 moves, since the limit rod 17 penetrates the L-shaped plate 15, the limit rod 17 will limit the movement of the L-shaped plate 15, so that the L-shaped plate 15 is always in a horizontal state.

[0037] After the chemical agent enters the anoxic tank 1, the bubble generator 3 is then started, and the bubble generator 3 discharges bubbles into the anoxic tank 1 through the pipe 4 and the air hole 5, and the motor 2 is started to control the rotating rod 6 and the stirring rod 7 to rotate, so that the stirring rod 7 stirs the chemical agent and the bubbles in the sewage to promote gas transfer and dissolution, and increase the efficiency of the denitrification reaction, so as to better treat the sewage, and then the treated sewage is discharged to the outside through the liquid outlet pipe 13, so that it is more convenient to use;

[0038] The treated sewage is then extracted and tested, so that the various indicators in the sewage, such as total nitrogen (N) ≤ 15mg / L, ammonia nitrogen (NH3-N) ≤ 5mg / L, total phosphorus (P) ≤ 0.5mg / L, chemical oxygen demand (COD) ≤ 60mg / L, biochemical oxygen demand (BOD5) ≤ 20mg / L, pH value (pH) within the range of 6 to 9, suspended solids (SS) ≤ 10mg / L, and oil ≤ 5mg / L, meet the specified discharge standards before it can be discharged.

[0039] 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 post-denitrification anoxic tank, characterized in that: include: An anoxic tank (1), wherein a cover plate (22) is arranged on the top of the anoxic tank (1), a support leg (9) is connected to the top of the cover plate (22), and a feed frame (10) is arranged on the top of the support leg (9); A feed pipe (11), the feed pipe (11) being arranged at the bottom of the feed frame (10), the bottom of the feed pipe (11) penetrating through the cover plate (22) and extending to the interior of the anoxic tank (1), and a scraper plate (14) being arranged on the inner side wall of the feed pipe (11); A bubble generator (3), the bubble generator (3) being arranged on one side of the anoxic pool (1), one side of the bubble generator (3) being connected to a pipe (4), the pipe (4) extending into the interior of the anoxic pool (1), and the surface of the pipe (4) being provided with air holes (5) at equal intervals; A material control mechanism is provided on one side of the feed pipe (11), and a cylinder (8) of the material control mechanism drives the L-shaped plate (15) to move so that a through hole (19) on the surface of the L-shaped plate (15) enters the interior of the feed pipe (11) to control the material.

2. A post-denitrification anoxic tank according to claim 1, characterized in that: The material control mechanism comprises a limit rod (17) arranged on one side of the feed pipe (11); the L-shaped plate (15) is slidably connected to the inside of the feed pipe (11); the inside of the feed pipe (11) is located at the upper and lower ends of the L-shaped plate (15) and is connected with a sealing gasket (20); the through hole (19) is opened on the surface of the L-shaped plate (15); the bottom of the scraper plate (14) is connected to the surface of the L-shaped plate (15); the limit rod (17) passes through the L-shaped plate (15); the cylinder (8) is connected to the top of the cover plate (22); and the output end of the cylinder (8) is connected to one side of the L-shaped plate (15).

3. A post-denitrification anoxic tank according to claim 1, characterized in that: A liquid inlet pipe (12) is provided on one side of the anoxic pool (1), and a liquid outlet pipe (13) is provided on one side of the anoxic pool (1) below the liquid inlet pipe (12).

4. A post-denitrification anoxic tank according to claim 1, characterized in that: The other side of the anoxic pool (1) is connected to a motor (2), the output end of the motor (2) is connected to a rotating rod (6), and stirring rods (7) are connected to the surface of the rotating rod (6) at equal intervals.

5. The post-denitrification anoxic tank according to claim 1, characterized in that: An observation window (21) is connected to the surface of the anoxic pool (1).

6. A post-denitrification anoxic tank according to claim 2, characterized in that: The limiting rod (17) passes through the L-shaped plate (15) and is then connected to the limiting plate (16).

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