Biological denitrification reactor

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a biological denitrification reactor which comprises a reaction box, a water inlet pipe, a water outlet pipe and a mixing assembly, the side wall of the reaction box is respectively connected with the water inlet pipe and the water outlet pipe, the water inlet pipe and the water outlet pipe are both connected with electromagnetic valves, and the mixing assembly is connected in the reaction box. The mixing assembly comprises a stirring assembly and an auxiliary assembly, the stirring assembly is connected into the reaction box, and the auxiliary assembly is connected to the stirring assembly. In the utility model, the stirring assembly rotates to drive the water body to rotate to accelerate the internal reaction speed of the water body; the auxiliary assembly is connected to the stirring assembly, the auxiliary assembly and the stirring assembly synchronously and reversely rotate, and the rotating water body is disordered through the reverse rotation of the auxiliary assembly and the stirring assembly, so that the situation that the mixing effect is affected due to the swirling phenomenon during rotation of the water body is avoided; meanwhile, the auxiliary assembly and the stirring assembly are staggered during rotation and cannot collide with each other.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and particularly relates to a biological denitrification reactor. Background Art

[0002] Biological denitrification refers to the process in which organic nitrogen and ammonia nitrogen in sewage are finally converted into nitrogen gas through ammonification, nitrification, and denitrification under the combined action of microorganisms. It has the advantages of economy, effectiveness, easy operation, and no secondary pollution, so it is widely used in sewage treatment nowadays.

[0003] After retrieval, Chinese Patent Publication No. CN211847626U discloses a biological denitrification reactor, including a main body mechanism, the inner cavity of which is provided with a stirring mechanism for stirring sewage, and the inner cavity of the main body mechanism is also provided with an aerator for improving the reaction efficiency of aerobic microorganisms and chemical enzymes; the main body mechanism includes a reaction cylinder, the top of the reaction cylinder is provided with a cover plate, and a partition is fixedly connected to the inner cavity of the reaction cylinder. The partition divides the inner cavity of the reaction cylinder into three equal chambers, and each chamber is provided with a stirring mechanism; the stirring mechanism is composed of a first stirring member, a second stirring member, and a linkage member. When the driving mechanism drives the first stirring member to rotate, the linkage member and the second stirring member can be driven to rotate synchronously, and the first stirring member rotates in the vertical direction, and the second stirring member swings up and down in the horizontal direction, so as to slow down and reduce the swirling phenomenon generated by the stirring mechanism during stirring, which helps to improve the mixing effect between sewage and oxygen, and between sewage and anaerobic bacteria, and further improves the mixing efficiency.

[0004] However, in the above technical solution, the Z-shaped linkage member drives the second stirring member to stir while the first stirring member rotates and stirs. When the first stirring member rotates, it will continuously collide with the linkage members on both sides of it. When the first stirring member rotates too fast, it will accelerate the damage of the first stirring member and the linkage member. When the speed of the first stirring member is slow, although the damage to the first stirring member and the linkage member is reduced, the effect that its stirring can provide decreases. Summary of the Utility Model

[0005] The purpose of the utility model is to propose a biological denitrification reactor aiming at the problems existing in the background art.

[0006] The technical solution of the utility model: A biological denitrification reactor includes a reaction tank, which is provided with a water inlet pipe and a water outlet pipe, and electromagnetic valves are connected to both the water inlet pipe and the water outlet pipe; a mixing assembly, which is connected inside the reaction tank, and the mixing assembly includes a stirring assembly and an auxiliary assembly, and the stirring assembly is connected inside the reaction tank; in the working state of the stirring assembly, the stirring assembly rotates to drive the water body to rotate and accelerate the reaction speed; the auxiliary assembly is connected to the stirring assembly; in the working state of the auxiliary assembly, the auxiliary assembly rotates in the opposite direction to the stirring assembly synchronously.

[0007] Preferably, three partition plates are provided inside the reaction tank to divide the inside of the reaction tank into an ammonification reaction chamber, a nitrification reaction chamber, and a denitrification reaction chamber; the ammonification reaction chamber, the nitrification reaction chamber, and the denitrification reaction chamber are sequentially connected through pipelines; a one-way solenoid valve is provided on each pipeline; an air inlet pipe and an air outlet pipe are provided on the reaction tank for the ammonification reaction chamber, the nitrification reaction chamber, and the denitrification reaction chamber; the water inlet pipe is connected to the ammonification reaction chamber; the water outlet pipe is connected to the denitrification reaction chamber.

[0008] Preferably, three sets of stirring components and auxiliary components are provided in one-to-one correspondence and are respectively installed in the ammonification reaction chamber, the nitrification reaction chamber, and the denitrification reaction chamber.

[0009] Preferably, the stirring component includes a driving device, which is connected to the reaction tank;

[0010] a stirring shaft, which is rotatably installed in the ammonification reaction chamber, the nitrification reaction chamber, or the denitrification reaction chamber and is in transmission connection with the driving device; a plurality of stirring plates, which are all installed on the stirring shaft.

[0011] Preferably, the auxiliary component includes a driving gear, which is connected to the stirring shaft; a plurality of transmission gears, which are evenly distributed in a circle with the central axis of the driving gear as the center, and a fixing rod is connected to each transmission gear. The fixing rod is rotatably connected to the inner wall of the ammonification reaction chamber, the nitrification reaction chamber, or the denitrification reaction chamber. The plurality of transmission gears are meshed with the driving gear; a gear ring, which is sleeved outside the transmission gears, and the gear ring is meshed with the plurality of transmission gears. The gear ring is rotatably connected to the inner wall of the ammonification reaction chamber, the nitrification reaction chamber, or the denitrification reaction chamber; a plurality of connecting rods, which are all connected to the gear ring; a plurality of stirring rods, which are evenly distributed along the height direction of the connecting rods and are all connected to the plurality of connecting rods.

[0012] Preferably, a plurality of notches are formed on the stirring plates, and bumps are connected to the stirring rods; the stirring plates and the stirring rods are in one-to-one correspondence; when the stirring plates and the stirring rods are in a rotating state, the bumps penetrate through the notches.

[0013] Preferably, a plurality of auxiliary stirring members are connected to the connecting rods, and the auxiliary stirring members are all inclined.

[0014] Compared with the prior art, the above technical solutions of the present utility model have the following beneficial technical effects:

[0015] In the present utility model, when the stirring component operates, it rotates to drive the water body to rotate to accelerate the internal reaction speed of the water body in the reaction tank. When the auxiliary component and the stirring component rotate, they rotate in the opposite direction synchronously. By rotating the auxiliary component and the stirring component in the opposite direction, the rotating water body is disrupted to avoid the phenomenon of water swirling during rotation, which affects the mixing effect. At the same time, when the auxiliary component and the stirring component rotate, they do not collide with each other. Description of the Drawings

[0016] Figure 1 is a perspective view of the present utility model;

[0017] Figure 2 is a schematic structural view of the reaction tank;

[0018] Figure 3 is a schematic structural view of the mixing assembly;

[0019] Figure 4 is Figure 3 an enlarged view of the structure at position A of

[0020] Reference numerals: 1, reaction tank; 2, water inlet pipe; 3, water outlet pipe; 4, partition board; 5, ammonification reaction chamber; 6, nitrification reaction chamber; 7, denitrification reaction chamber; 8, air inlet pipe; 9, air outlet pipe; 10, driving device; 11, stirring shaft; 12, stirring plate; 13, driving gear; 14, transmission gear; 15, fixed rod; 16, gear ring; 17, connecting rod; 18, stirring rod; 19, auxiliary stirring member. Detailed implementation manners

[0021] Embodiment 1

[0022] As Figures 1-4 shown, a biological denitrification reactor proposed by the present utility model includes a reaction tank 1, a water inlet pipe 2, a water outlet pipe 3 and a mixing assembly. The top and bottom of the side wall of the reaction tank 1 are connected with the water inlet pipe 2 and the water outlet pipe 3. Solenoid valves are connected to both the water inlet pipe 2 and the water outlet pipe 3. The mixing assembly is connected inside the reaction tank 1. The mixing assembly includes a stirring assembly and an auxiliary assembly. The stirring assembly is connected inside the reaction tank 1. In the working state of the stirring assembly, the stirring assembly rotates to drive the water body to rotate, accelerating the internal reaction speed of the water body. The auxiliary assembly is connected to the stirring assembly. In the working state of the auxiliary assembly, the auxiliary assembly rotates in the opposite direction synchronously with the stirring assembly. By the reverse rotation of the auxiliary assembly and the stirring assembly, the rotating water body is disrupted to prevent the water body from swirling during rotation, which affects the mixing effect. At the same time, when the auxiliary assembly and the stirring assembly rotate, they intersect with each other and do not collide with each other.

[0023] In an optional embodiment, a plurality of partition boards 4 are connected inside the reaction tank 1. The plurality of partition boards 4 are evenly distributed in a circle centered on the central axis of the reaction tank 1. One end of each of the plurality of partition boards 4 is connected to the inner wall of the reaction tank 1, and the other end of each of the plurality of partition boards 4 is connected together at the central axis of the reaction tank 1 to divide the reaction tank 1 into a plurality of fan-shaped chambers. A one-way solenoid valve is connected to each partition board 4. After the space inside the reaction tank 1 is divided by the partition boards 4, various processes can be carried out in a relatively small space. Among them, the number of partition boards 4 is selected but not limited to three to divide the reaction tank 1 into three chambers.

[0024] In an alternative embodiment, the three chambers are, in sequence, an ammonification reaction chamber 5, a nitrification reaction chamber 6, and a denitrification reaction chamber 7. An intake pipe 8 and an outlet pipe 9 are connected to the tops of all three chambers. That is, there are three sets of intake pipes 8 and outlet pipes 9 respectively corresponding to the ammonification reaction chamber 5, the nitrification reaction chamber 6, and the denitrification reaction chamber 7. The water inlet pipe 2 is connected to the ammonification reaction chamber 5. The water outlet pipe 3 is connected to the denitrification reaction chamber 7. The ammonification reaction chamber 5, the nitrification reaction chamber 6, and the denitrification reaction chamber 7 are connected in sequence through pipes, and the above-mentioned pipes are correspondingly installed on the partition 4. One-way solenoid valves are correspondingly installed on the pipes. A water pump is connected to the pipes to convey water from low to high. The water pump can be, but is not limited to, a centrifugal pump. The liquid treated in the ammonification reaction chamber 5 flows into the nitrification reaction chamber 6 through the one-way solenoid valve on the partition 4 between the ammonification reaction chamber 5 and the nitrification reaction chamber 6. The liquid in the nitrification reaction chamber 6 flows into the denitrification reaction chamber 7 through the one-way solenoid valve on the partition 4 between the nitrification reaction chamber 6 and the denitrification reaction chamber 7.

[0025] The intake pipe 8 and the outlet pipe 9 are used to connect to external gas supply equipment to provide oxygen or inert gas to the chamber to keep the sewage in an anaerobic or aerobic environment during different treatment processes, ensuring the smooth progress of the denitrification reaction.

[0026] Embodiment Two

[0027] As Figures 3-4 shown, a biological denitrification reactor proposed by the present utility model, compared with Embodiment One, details of the stirring assembly and the auxiliary assembly are described in this embodiment. The number of stirring assemblies is the same as the number of chambers, and the stirring assemblies and the auxiliary assemblies correspond one by one. That is, there are three stirring assemblies and three auxiliary assemblies respectively installed in the ammonification reaction chamber 5, the nitrification reaction chamber 6, and the denitrification reaction chamber 7.

[0028] The stirring assembly includes a driving device 10, a stirring shaft 11, and stirring plates 12. The driving device 10 is installed on the reaction tank 1. The driving device 10 is selected as an electric motor. The stirring shaft 11 is rotatably installed in the chamber. The stirring shaft 11 is drivingly connected to a driving device 10. Among them, one end of the stirring shaft 11 is rotatably connected to the reaction tank 1 through a bearing and extends out of the reaction tank 1 to be drivingly connected to the driving device 10. That is, one end of the stirring shaft 11 is rotatably connected to the reaction tank 1 through a bearing and extends out of the ammonification reaction chamber 5 or the nitrification reaction chamber 6 or the denitrification reaction chamber 7 to be drivingly connected to the driving device 10. The stirring shaft 11 can be, but is not limited to, connected to the output shaft of the driving device 10 through a speed reducer. A plurality of stirring plates 12 are evenly distributed at equal intervals along the length direction of the central axis of the stirring shaft 11 and are evenly distributed in a circular shape centered on the central axis direction of the stirring shaft 11. A plurality of stirring plates 12 are all connected to the stirring shaft 11.

[0029] The auxiliary components include a driving gear 13, a transmission gear 14, a fixed rod 15, a gear ring 16, a connecting rod 17 and a stirring rod 18. The driving gear 13 is connected to the stirring shaft 11. There are multiple transmission gears 14, and the number of the transmission gears 14 is selected to be but not limited to three. The multiple transmission gears 14 are evenly distributed in a circle centered on the central axis of the driving gear 13. The transmission gears 14 and the fixed rods 15 are in one-to-one correspondence. The transmission gear 14 is connected to the fixed rod 15, and the fixed rod 15 is rotatably connected to the inner wall of the chamber through a bearing. The multiple transmission gears 14 are all meshed with the driving gear 13. The gear ring 16 is sleeved outside the multiple transmission gears 14, and the gear ring 16 is rotatably connected to the inner wall of the ammoniation reaction chamber 5 or the nitrification reaction chamber 6 or the denitrification reaction chamber 7. The gear ring 16 is meshed with the multiple transmission gears 14. There are multiple connecting rods 17. The multiple connecting rods 17 are evenly distributed in a circle centered on the central axis of the gear ring 16. The connecting rod 17 is connected to the gear ring 16. The shape of the connecting rod 17 is an inverted L shape or a 7 shape. Multiple stirring rods 18 are evenly distributed at equal intervals along the height direction of the connecting rod 17, and the stirring rod 18 is connected to the connecting rod 17.

[0030] In an alternative embodiment, a plurality of notches are formed in the stirring plate 12, and a plurality of bumps are provided on the stirring rod 18. The stirring plate 12 and the stirring rod 18 are in one-to-one correspondence. When the stirring plate 12 and the stirring rod 18 are in a rotating state, the bumps penetrate through the notches.

[0031] In an alternative embodiment, a plurality of auxiliary stirring members 19 are connected to the connecting rod 17, and the auxiliary stirring members 19 are all inclined. The included angle between the auxiliary stirring member 19 and the bottom surface of the reaction tank 1 is 45 degrees.

[0032] In summary, when the utility model is in use, the staff discharges the sewage to be treated into the ammonification reaction chamber 5 in the reaction tank 1 through the water inlet pipe 2, and oxygen or inert gas can be added thereto through the air inlet pipe 8 and the air outlet pipe 9 at the top of the reaction tank 1. At the same time, the staff starts the driving device 10 to drive the stirring shaft 11 to rotate. The stirring plates 12 on the stirring shaft 11 rotate to mix the sewage to accelerate its reaction efficiency. While the stirring shaft 11 rotates, the driving gear 13 at the top thereof rotates synchronously. The driving gear 13 drives the transmission gear 14 and the gear ring 16 to rotate. The rotation direction of the gear ring 16 is opposite to that of the driving gear 13, so as to drive the connecting rod 17 and the stirring rod 18 to rotate in the opposite direction to the stirring plate 12, avoiding the phenomenon of water swirling. When the connecting rod 17 rotates, the multiple auxiliary stirring members 19 connected thereto also rotate synchronously to improve the stirring effect. After the sewage undergoes ammonification reaction in the ammonification reaction chamber 5, it is pumped and conveyed into the nitrification reaction chamber 6 through the one-way solenoid valve and the water pump, and oxygen is conveyed into its interior through the air inlet pipe 8 and the air outlet pipe 9 to keep it in an aerobic state. After nitrification reaction, it is pumped and conveyed to the denitrification reaction chamber 7 through the one-way solenoid valve and the water pump. The oxygen is discharged through the air outlet pipe 9, and inert gas is conveyed through the air inlet pipe 8 to keep it in an anoxic or anaerobic state. After the reaction is completed, it is discharged through the water outlet pipe 3.

[0033] The above has described in detail the embodiments of the present utility model in conjunction with the accompanying drawings. However, the present utility model is not limited thereto. Various changes can be made without departing from the gist of the present utility model within the scope of knowledge possessed by those skilled in the art to which the present utility model pertains.

Claims

1. A biological nitrogen removal reactor, characterized in that, include A reaction box (1) is provided with a water inlet pipe (2) and a water outlet pipe (3), and both the water inlet pipe (2) and the water outlet pipe (3) are connected to a solenoid valve; A mixing assembly is connected to a reaction box (1), comprising a stirring assembly and an auxiliary assembly. The stirring assembly is connected to the reaction box (1); when the stirring assembly is in use, the stirring assembly rotates to drive the water body to rotate and accelerate the reaction speed; the auxiliary assembly is connected to the stirring assembly; when the auxiliary assembly is in use, the auxiliary assembly and the stirring assembly rotate synchronously in opposite directions.

2. The biological denitrification reactor according to claim 1, wherein, Three partitions (4) are provided in the reaction box (1) to divide the interior of the reaction box (1) into an ammoniation reaction chamber (5), a nitrification reaction chamber (6), and a denitrification reaction chamber (7); the ammoniation reaction chamber (5), the nitrification reaction chamber (6), and the denitrification reaction chamber (7) are sequentially connected through pipelines; each pipeline is provided with a one-way solenoid valve; the ammoniation reaction chamber (5), the nitrification reaction chamber (6), and the denitrification reaction chamber (7) are all provided with an air inlet pipe (8) and an air outlet pipe (9) on the reaction box (1); the water inlet pipe (2) is connected to the ammoniation reaction chamber (5); and the water outlet pipe (3) is connected to the denitrification reaction chamber (7).

3. The biological denitrification reactor according to claim 2, characterized in that, Three groups of stirring components and auxiliary components are provided in a one-to-one correspondence and are installed in the ammoniation reaction chamber (5), the nitrification reaction chamber (6) and the denitrification reaction chamber (7) respectively.

4. The biological denitrification reactor according to claim 3, characterized in that, The stirring assembly includes A driving device (10) connected to the reaction box (1); A stirring shaft (11) is rotatably mounted in the ammoniation reaction chamber (5) or the nitrification reaction chamber (6) or the denitrification reaction chamber (7) and is transmission-connected to the driving device (10); There are multiple stirring plates (12), and the multiple stirring plates (12) are all installed on the stirring shaft (11).

5. A biological denitrification reactor according to claim 4, characterized in that, Auxiliary components include A driving gear (13) connected to the stirring shaft (11); A plurality of transmission gears (14) are provided and are evenly distributed around the central axis of the driving gear (13). Each transmission gear (14) is connected to a fixed rod (15). The fixed rod (15) is rotatably connected to the inner wall of the ammoniation reaction chamber (5), the nitrification reaction chamber (6), or the denitrification reaction chamber (7). The plurality of transmission gears (14) are meshed with the driving gear (13). A gear ring (16) is sleeved on the outside of the transmission gear (14), the gear ring (16) is meshed with the plurality of transmission gears (14), and the gear ring (16) is rotatably connected to the inner wall of the ammoniation reaction chamber (5), the nitrification reaction chamber (6), or the denitrification reaction chamber (7); A plurality of connecting rods (17) are provided, and the plurality of connecting rods (17) are all connected to the gear ring (16); A plurality of stirring rods (18) are provided, and the plurality of stirring rods (18) are evenly distributed along the height direction of the connecting rods (17) and are all connected to the plurality of connecting rods (17).

6. A biological denitrification reactor according to claim 4, characterized in that, A plurality of notches are formed on the stirring plate (12), and a protrusion is connected to the stirring rod (18); the stirring plate (12) and the stirring rod (18) correspond to each other one by one; when the stirring plate (12) and the stirring rod (18) are in a rotating state, the protrusion passes through the notches.

7. A biological denitrification reactor according to claim 5, characterized in that, A plurality of auxiliary stirring members (19) are connected to the connecting rod (17), and the auxiliary stirring members (19) are all arranged at an angle.

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