Aerobic tank water and air distribution system

Abstract

The aerobic tank water distribution and air distribution system comprises an aerobic tank and water distribution pipelines and air distribution pipelines, wherein the aerobic tank comprises a water distribution and air distribution area, a light filler area above the water distribution and air distribution area, and a water outlet area above the light filler area; the water distribution pipelines comprise a water inlet pipe and a water distribution pipe with water distribution holes on the surface, the water distribution pipe being laid in the water distribution and air distribution area and connected with the water inlet pipe; the air distribution pipelines comprise aerators, which are arranged in the water distribution pipe. The aerators are arranged in the water distribution pipelines to combine the aeration pipelines and the air distribution pipelines, which reduces the pipeline design in the tank, increases the effective working space in the tank, effectively reduces the impact of the aeration gas on the light filler in the tank under the condition of constant aeration amount, and reduces the abrasion of the light filler caused by aeration scrubbing. The water flow in the water distribution pipe can effectively reduce the blockage probability of the aeration membrane in the aerator.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to an aerobic tank water and air distribution system. Background Technology

[0002] Biofilm technology is a widely used biological wastewater treatment method. It involves adding lightweight packing material to allow microorganisms to accumulate and grow on the material, thereby enabling the removal of organic matter and ammonia nitrogen from the water.

[0003] In existing water and air distribution systems, the uniformity of aeration is usually increased by adding external equipment. However, this method has problems such as excessive aeration pressure causing significant wear on lightweight packing materials, and inconvenience in system pipeline installation and maintenance. Summary of the Invention

[0004] In order to solve the technical problems existing in the background art, the present invention proposes an aerobic pool water and air distribution system.

[0005] This invention proposes an aerobic tank water and air distribution system, comprising: an aerobic tank, and water distribution pipes and air distribution pipes, wherein:

[0006] The aerobic tank includes a water and air distribution zone, a lightweight filler zone above the water and air distribution zone, and an effluent zone above the lightweight filler zone.

[0007] The water distribution pipeline includes an inlet pipe and a water distribution pipe with water distribution holes on its surface. The water distribution pipe is laid in the water and air distribution area and connected to the inlet pipe.

[0008] The air distribution pipeline includes an aerator, which is located inside the water distribution pipeline.

[0009] Preferably, the water distribution holes are located on the upper surface of the water distribution pipe.

[0010] Preferably, the water distribution hole includes a first water outlet, a second water outlet, and a connecting channel connecting the first water outlet and the second water outlet. The first water outlet and the second water outlet are both located on the upper surface of the water distribution pipe and are respectively located on both sides of the center line of the water distribution pipe. The connecting channel is located between the first water outlet and the second water outlet.

[0011] Preferably, the water distribution pipe is a square pipe.

[0012] Preferably, the air inlet end of the aerator is equipped with a pipe joint, which can be detachably installed on the outer wall of the aerobic tank.

[0013] Preferably, the gas distribution pipeline also includes an aeration pipe for supplying gas to the aerator, the aeration pipe being located outside the aerobic tank and connected to a pipe joint to form a connection with the aerator.

[0014] Preferably, the aerobic tank has a box-like structure.

[0015] Preferably, the side wall of the inlet pipe forms part of the outer wall of the aerobic tank, and the pipe joint can be detachably installed on the inlet pipe.

[0016] Preferably, the aerator is a tubular aerator or a flexible aerator, with the pipe joint installed at one end of the tubular aerator or flexible aerator, and the other end of the tubular aerator or flexible aerator extending into the water distribution pipe through the water inlet pipe.

[0017] Preferably, there are two inlet pipes, which are set separately, and the sides of the two pipes that are far apart from each other constitute part of the outer wall of the aerobic tank; there are multiple distribution pipes, all of which are located between the two inlet pipes and are spaced apart along the length of the inlet pipes, and the two ends of each distribution pipe are fixed to and connected to the two inlet pipes respectively, and each distribution pipe is equipped with a corresponding aerator.

[0018] Preferably, the water distribution pipeline also includes a delivery pipe connected to the inlet pipe to deliver sewage into the inlet pipe.

[0019] Preferably, a single-hole membrane aerator can also be used.

[0020] Preferably, the outlet area is provided with an outlet channel and an outlet weir.

[0021] In this invention, the aerator is installed within the water distribution pipeline, merging the aeration and air distribution pipelines. This structural design reduces the amount of piping required within the tank, increases the effective working space, and effectively reduces the impact of aeration gas on the lightweight packing material while maintaining a constant aeration volume, thus reducing wear on the lightweight packing material caused by aeration scrubbing. Furthermore, the water flow within the water distribution pipeline effectively reduces the probability of clogging of the aeration membrane in the aerator. Attached Figure Description

[0022] Figure 1 This is a front view of an aerobic tank water and air distribution system proposed in this invention;

[0023] Figure 2 This is a side view of an aerobic tank water and air distribution system proposed in this invention;

[0024] Figure 3 This invention provides an assembly diagram of the water distribution pipe, water inlet pipe, and aerator in an aerobic tank water and air distribution system.

[0025] Figure 4 for Figure 3 A magnified view of a portion of the image;

[0026] Figure 5 This is a schematic diagram of the aerator being withdrawn from the water distribution pipe in an aerobic pool water and air distribution system proposed in this invention. Detailed Implementation

[0027] Reference Figure 1-4 The present invention proposes an aerobic tank water and air distribution system, comprising: an aerobic tank 1, and 4 water distribution pipes and 4 air distribution pipes, wherein:

[0028] The aerobic tank 1 includes a water and air distribution zone, a lightweight filler zone above the water and air distribution zone, and an outlet zone above the lightweight filler zone. The outlet zone is equipped with an outlet channel 8 and an outlet weir 9.

[0029] The water distribution pipe 4 includes an inlet pipe 3 and a water distribution pipe 4 with water distribution holes 41 on its surface. The water distribution pipe 4 is laid in the water and air distribution area and is connected to the inlet pipe 3. The air distribution pipe includes an aeration pipe and an aerator 5. The aerator 5 is located inside the water distribution pipe 4 and is connected to the aeration pipe.

[0030] During operation, wastewater enters the distribution pipe 4 through the inlet pipe 3, and then enters the area below the lightweight packing material through the distribution holes 41 on the distribution pipe 4. Meanwhile, the aeration gas enters the aerator 5 through the aerator pipe, and then enters the distribution pipe 4 through the aerator 5. Finally, it is discharged through the distribution holes 41 along with the wastewater. Since the aeration gas maintains its original air volume while being discharged through the distribution pipe 4 and its distribution holes 41, the aeration pressure is reduced. This aeration method ensures sufficient oxygen supply while reducing frictional wear on the lightweight packing material 2.

[0031] As can be seen from the above, by placing the aerator 5 in the water distribution pipe 4, the aeration pipe and the air distribution pipe are combined, which can effectively reduce the impact of the aeration gas on the lightweight packing material 2 in the tank and reduce the wear of the lightweight packing material 2 caused by aeration scrubbing. Furthermore, the water flow in the water distribution pipe 4 can effectively reduce the probability of clogging of the aeration membrane in the aerator 5.

[0032] In addition, in this embodiment, the water distribution hole 41 is provided on the upper surface of the water distribution pipe 4 to prevent the gas generated by aeration from accumulating in the water distribution pipe 4 and forming an air cavity in the water distribution pipe 4, thereby avoiding the reduction of the water flow area of ​​the water distribution pipe 4 due to the formation of the air cavity.

[0033] Furthermore, the water distribution hole 41 includes a first water outlet, a second water outlet, and a connecting channel connecting the first water outlet and the second water outlet. The first water outlet and the second water outlet are both located on the upper surface of the water distribution pipe 4 and are respectively located on both sides of the center line of the water distribution pipe 4. The connecting channel is located between the first water outlet and the second water outlet. The design of the two water outlets and the connecting channel connecting the two water outlets can effectively ensure that air has a sufficient diameter to be discharged from the water distribution pipe 4.

[0034] Furthermore, in this embodiment, the water distribution pipe 4 is a square pipe to ensure that its top surface has sufficient area for designing water distribution holes 41, so as to prevent the formation of air cavities inside the pipe.

[0035] Reference Figure 5In addition, in this embodiment, a pipe connector 6 is installed at the air inlet end of the aerator 5. The pipe connector 6 is detachably installed on the outer wall of the aerobic tank 1. The aeration pipe is located outside the aerobic tank 1 and connected to the aerator 5 through the pipe connector 6. The specific structural design is as follows: the aerobic tank 1 adopts a box structure, and the side wall of the inlet pipe 3 forms part of the outer wall of the aerobic tank 1. The aerator 5 adopts a tubular aerator or a flexible aerator. First, the pipe connector 6 is installed at one end of the tubular aerator or the flexible aerator, and then the pipe connector 6 is detachably installed on the inlet pipe 3, so that the other end of the tubular aerator or the flexible aerator extends from the inlet pipe 3 into the distribution pipe 4. When the aeration pipe is blocked or damaged, it can be directly removed from the outside of the aerobic tank 1. When the aerator 5 is blocked or damaged, the pipe connector 6 is first removed from the outer wall of the aerobic tank 1, and then the aerator 5 is pulled out from the distribution pipe 4 from the outside of the aerobic tank 1.

[0036] Furthermore, aerator 5 can also be a single-hole membrane aerator.

[0037] Furthermore, in this embodiment, two inlet pipes 3 are provided and installed separately, with their opposite sides forming part of the outer wall of the aerobic tank 1. Multiple distribution pipes 4 are provided, all located between two inlet pipes 3 and spaced apart along the length of the inlet pipes 3. Each distribution pipe 4 has two inlet pipes 3 fixed to and connected at both ends, and each distribution pipe 4 is equipped with a corresponding aerator 5. This design allows water to enter from both ends of the distribution pipes 4 simultaneously, thereby reducing the diameter of the main inlet pipe while ensuring the same water delivery volume, which helps to reduce the occupation of vertical space within the tank.

[0038] In addition, the water distribution pipeline in this embodiment also includes a conveying pipe 7 connected to the inlet pipe 3 to convey sewage into the inlet pipe 3. During operation, the water to be treated enters the inlet pipe 3 from the conveying pipe 7, enters the water distribution pipe 4 from the inlet pipe 3, and is finally evenly distributed into the aerobic tank 1 through the water distribution holes 41.

[0039] Furthermore, one end of the conveying pipe 7 is fixed and connected to the inlet pipe 3, and the other end of the conveying pipe 7 passes through the light packing area and the outlet area in sequence to extend to the outside of the aerobic tank 1.

[0040] In summary, the present invention has at least the following advantages compared with the prior art:

[0041] 1. By placing the aerator 5 in the water distribution pipe 4, the aeration pipe and the air distribution pipe are combined, which can effectively reduce the impact of the aeration gas on the lightweight packing material 2 in the tank and reduce the wear of the lightweight packing material 2 caused by aeration scrubbing. In addition, the water flow in the water distribution pipe 4 can effectively reduce the probability of clogging of the aeration membrane in the aerator 5.

[0042] 2. The design of pipelines inside the pool has been reduced, increasing the effective working space inside the pool.

[0043] 3. By designing the position and structure of the water distribution hole 41, the smoothness of gas discharge can be effectively ensured, and the gas generated by aeration can be prevented from accumulating in the water distribution pipe 4 and forming an air cavity inside the air distribution pipe.

[0044] 4. By installing a pipe connector 6 at the end of the aerator 5 and detachably installing the pipe connector 6 on the outer wall of the aerobic tank 1, this structural design allows the aeration pipe to be directly arranged to the outside of the aerobic tank 1 and form a detachable connection with the aerator 5. Simultaneously, it allows the aerator 5 to be directly pulled out from the outside of the aerobic tank 1, avoiding the cumbersome steps of removing lightweight packing material when maintaining the aeration pipe or aerator 5. This significantly reduces the workload and cost of equipment maintenance.

[0045] Example 1

[0046] In this embodiment, the wastewater to be treated is from a river. The main influent water quality parameters include ammonia nitrogen, COD, BOD, and total phosphorus. The designed influent flow rate of the river is 5000 m³ / d, and the designed influent water quality standards are ammonia nitrogen ≤ 8 mg / L, COD ≤ 110 mg / L, BOD ≤ 45 mg / L, and total phosphorus ≤ 1.3 mg / L. The designed effluent water quality standard is Class IV surface water, i.e., ammonia nitrogen ≤ 1.5 mg / L, COD ≤ 30 mg / L, BOD ≤ 6 mg / L, and total phosphorus ≤ 0.3 mg / L.

[0047] After pretreatment, the wastewater enters the distribution pipe 4 through the inlet pipe 3 of the aerobic tank's water and air distribution system, and then enters the aerobic tank 1 through the distribution holes 41 on the distribution pipe 4. The aeration gas enters the distribution pipe 4 through the aerator 5, and then enters the tank through the distribution holes 41 on the distribution pipe 4.

[0048] By monitoring various parameters in the system during operation, the dissolved oxygen concentration of the system is 3-4 mg / L, with an average of 3.7 mg / L; the oxygen utilization rate can reach over 30%, with an average utilization rate of 29.3%. The aerobic tank water and air distribution system can achieve economical and efficient operating conditions.

[0049] Example 2

[0050] After about a year of operation, the volume of the lightweight packing material 2 in multiple aerobic tanks 1 of the aerobic tank water and air distribution system was measured. It was found that the loss rate of the lightweight packing material 2 in aerobic tank 1 of the aerobic tank water and air distribution system was about 2.7-6.8%, with an average loss rate of 4.7%.

[0051] Then, the lightweight packing material 2 was replenished back into each system. After a six-month operation period, the volume of the lightweight packing material 2 in the system was tested again. The test showed that the loss rate of the lightweight packing material 2 was about 3.8-8.5%, and the average loss rate was 6.1%.

[0052] The above two tests show that when the aerobic water and air distribution system proposed in this invention is used for sewage treatment, the loss rate of the lightweight filler 2 is reduced, and the lightweight filler 2 does not need to be replenished for at least 1.5 years.

[0053] The traditional perforated pipe water and air distribution method has a lightweight filler loss rate of approximately 5.9-11.3% over one year, with an average loss rate of 9.6%; and an average loss rate of approximately 8.3-16.8% over one and a half years, with an average loss rate of 13.2%.

[0054] In summary, compared with the traditional perforated pipe water and air distribution method, the aerobic tank water and air distribution system proposed in this invention can greatly reduce the loss of lightweight packing materials.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An aerobic tank water and air distribution system, characterized in that, include: The aerobic tank (1), as well as the water distribution pipeline and the air distribution pipeline, wherein: The aerobic tank (1) includes a water and air distribution zone, a light filler zone located above the water and air distribution zone, and an outlet zone located above the light filler zone. The water distribution pipeline includes an inlet pipe (3) and a water distribution pipe (4) with water distribution holes (41) on its surface. The water distribution pipe (4) is laid in the water and air distribution area and connected to the inlet pipe (3). The air distribution pipeline includes an aerator (5), which is located inside the water distribution pipe (4); There are two inlet pipes (3), which are set separately, and the two sides that are far apart from each other constitute part of the outer wall of the aerobic tank (1); there are multiple distribution pipes (4), all of which are located between the two inlet pipes (3) and are spaced apart along the length of the inlet pipes (3), and both ends of each distribution pipe (4) are fixed and connected to the two inlet pipes (3), and each distribution pipe (4) is equipped with a corresponding aerator (5). The air inlet end of the aerator (5) is equipped with a pipe joint (6), which can be detachably installed on the outer wall of the aerobic tank (1).

2. The aerobic pool water and air distribution system according to claim 1, characterized in that, Water distribution hole (41) is located on the upper surface of water distribution pipe (4).

3. The aerobic pool water and air distribution system according to claim 2, characterized in that, The water distribution hole (41) includes a first water outlet, a second water outlet, and a connecting channel connecting the first water outlet and the second water outlet. The first water outlet and the second water outlet are both located on the upper surface of the water distribution pipe (4) and are located on both sides of the center line of the water distribution pipe (4). The connecting channel is located between the first water outlet and the second water outlet.

4. The aerobic pool water and air distribution system according to claim 1, characterized in that, The water distribution pipe (4) is a square pipe.

5. The aerobic tank water and air distribution system according to claim 1, characterized in that, The gas distribution pipeline also includes an aeration pipe for supplying gas to the aerator (5), which is located outside the aerobic tank (1) and connected to a pipe joint (6) to form a connection with the aerator (5).

6. The aerobic pool water and air distribution system according to claim 1, characterized in that, The aerobic tank (1) is a box structure.

7. The aerobic pool water and air distribution system according to claim 6, characterized in that, The side wall of the inlet pipe (3) forms part of the outer wall of the aerobic tank (1), and the pipe joint (6) is detachably installed on the inlet pipe (3).

8. The aerobic pool water and air distribution system according to claim 7, characterized in that, The aerator (5) is a tubular aerator or a flexible aerator. The pipe joint (6) is installed at one end of the tubular aerator or the flexible aerator, and the other end of the tubular aerator or the flexible aerator extends into the water distribution pipe (4) through the water inlet pipe (3).

9. The aerobic pool water and air distribution system according to claim 1, characterized in that, The water distribution pipeline also includes a delivery pipe (7) connected to the inlet pipe (3) to deliver sewage into the inlet pipe (3).

10. An aerobic pool water and air distribution system according to any one of claims 1-9, characterized in that, The aerator (5) adopts a single-hole membrane aerator.

11. An aerobic pool water and air distribution system according to any one of claims 1-9, characterized in that, The outlet area is equipped with an outlet channel (8) and an outlet weir (9).

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