Water and gas distribution system of aerobic tank

Abstract

The invention provides an aerobic tank water and gas distribution system which comprises an aerobic tank, a water distribution pipeline and a gas distribution pipeline, the aerobic tank comprises a water and gas distribution area, a light filler area located above the water and gas distribution area and a water outlet area located above the light filler area; the water distribution pipeline comprises a water inlet pipe and a water distribution pipe with water distribution holes in the surface, and the water distribution pipe is laid in the water and gas distribution area and connected with the water inlet pipe; the gas distribution pipeline comprises an aerator which is positioned in the water distribution pipe. According to the invention, the aerators are arranged in the water distribution pipeline to combine the aeration pipeline and the gas distribution pipeline, so that the structural design reduces the design of pipelines in the tank, increases the effective working space in the tank, and can effectively reduce the impact of aerated gas on the light filler in the tank under the condition of ensuring that the aeration rate is unchanged; the abrasion of aeration scrubbing to the light filler is reduced. And the blocking probability of the aeration membrane in the aerator can be effectively reduced by the water flow flowing in the water distribution pipe.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to an aerobic pool water and gas distribution system. Background Art

[0002] The biofilm method is a widely used biological sewage treatment method. By adding lightweight fillers, microorganisms are enriched and grown on the lightweight fillers, thus enabling them to remove organic matter and ammonia nitrogen from the water.

[0003] In the existing water and air distribution system, aeration uniformity is usually increased by adding external equipment. However, this method has problems such as excessive aeration air pressure causing great wear on lightweight fillers, and inconvenient system pipeline installation and maintenance. Summary of the invention

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

[0005] The present invention provides an aerobic pool water and air distribution system, comprising: an aerobic pool, and a water distribution pipeline and an air distribution pipeline, wherein:

[0006] The aerobic pool includes a water and gas distribution area, a light filler area located above the water and gas distribution area, and a water outlet area located above the light filler area;

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

[0008] The air distribution pipeline includes an aerator, and the aerator is located in the water distribution pipe.

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

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

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

[0012] Preferably, a pipe joint is installed at the air inlet end of the aerator, and the pipe joint is detachably installed on the outer wall of the aerobic tank.

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

[0014] Preferably, the aerobic tank is a box structure.

[0015] Preferably, the side wall on one side of the water inlet pipe constitutes a part of the outer wall of the aerobic tank, and the pipe joint is detachably mounted on the water inlet pipe.

[0016] Preferably, the aerator is a tubular aerator or a hose aerator, a pipe joint is installed at one end of the tubular aerator or the hose aerator, and the other end of the tubular aerator or the hose aerator extends from the water inlet pipe into the water distribution pipe.

[0017] Preferably, two water inlet pipes are provided and arranged separately, and the side surfaces of the two water inlet pipes that are far away from each other respectively constitute a part of the outer wall of the aerobic pool; there are multiple water distribution pipes, all of which are located between the two water inlet pipes and are arranged at intervals along the length direction of the water inlet pipes, and the two water inlet pipes are fixed and connected at both ends of each water distribution pipe, and each water distribution pipe is equipped with an aerator corresponding to it.

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

[0019] Preferably, the aerator may also be a single-pore membrane aerator.

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

[0021] In the present invention, the aerator is arranged in the water distribution pipeline to merge the aeration pipeline with the gas distribution pipeline. This structural design reduces the pipeline design in the pool, increases the effective working space in the pool, and can effectively reduce the impact of the aerated gas on the lightweight filler in the pool while ensuring that the aeration volume remains unchanged, and reduce the wear of the lightweight filler by aeration scrubbing. In addition, the water flow in the water distribution pipe can effectively reduce the probability of clogging of the aeration membrane in the aerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front view of an aerobic pool water and air distribution system proposed by the present invention;

[0023] Figure 2 A side view of a water and air distribution system for an aerobic pool proposed by the present invention;

[0024] Figure 3 A schematic diagram of the assembly of the water distribution pipe, the water inlet pipe and the aerator in the aerobic pool water and air distribution system proposed by the present invention;

[0025] Figure 4 for Figure 3 A partial enlarged view of

[0026] Figure 5 This is a schematic diagram of a state where the aerator in the aerobic pool water and air distribution system proposed by the present invention is removed from the water distribution pipe. DETAILED DESCRIPTION

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

[0028] The aerobic pool 1 comprises a water and gas distribution area, a light filler area located above the water and gas distribution area, and a water outlet area located above the light filler area. The water outlet area is provided with a water outlet channel 8 and a water outlet weir 9.

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

[0030] During operation, sewage enters the water distribution pipe 4 through the water inlet pipe 3, and enters the lower part of the light filler area through the water distribution holes 41 on the water distribution pipe 4, while the aeration gas enters the aerator 5 through the aeration pipe, enters the water distribution pipe 4 through the aerator 5, and is then discharged from the water distribution holes 41 together with the sewage. When the aeration gas is discharged through the water distribution pipe 4 and its water distribution holes 41, its air volume remains the same, while the aeration air pressure is reduced. This aeration method reduces the friction loss of aeration on the light filler 2 while ensuring sufficient oxygen supply for aeration.

[0031] As can be seen from the above, the present invention sets the aerator 5 in the water distribution pipe 4 to merge the aeration pipeline with the gas distribution pipeline, which can effectively reduce the impact of the aerated gas on the lightweight filler 2 in the pool and reduce the wear of the aeration scrubbing on the lightweight filler 2. 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.

[0032] In addition, the water distribution holes 41 in this embodiment are arranged 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 reducing 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 end, a second water outlet end, and a connecting channel connecting the first water outlet end and the second water outlet end. The first water outlet end and the second water outlet end are both located on the upper surface of the water distribution pipe 4 and are separated on both sides of the center line of the water distribution pipe 4. The connecting channel is located between the first water outlet end and the second water outlet end. The design of the two water outlet ends and the connecting channel connecting the two water outlet ends can effectively ensure that the air has sufficient caliber to discharge from the water distribution pipe 4.

[0034] Furthermore, the water distribution pipe 4 in this embodiment adopts a square pipe to ensure that there is enough area on its top surface to design the water distribution hole 41 to prevent the formation of an air cavity in the pipe.

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

[0036] Furthermore, the aerator 5 may also be a single-pore membrane aerator.

[0037] Furthermore, in this embodiment, two water inlet pipes 3 are provided and are separately provided, and the side surfaces of the two water inlet pipes 3 that are far from each other respectively constitute a part of the outer wall of the aerobic pool 1; there are multiple water distribution pipes 4, all of which are located between the two water inlet pipes 3 and are arranged at intervals along the length direction of the water inlet pipes 3, and the two water inlet pipes 3 are fixed and connected at both ends of each water distribution pipe 4, and an aerator 5 corresponding to it is installed in each water distribution pipe 4. The design of this structure allows water to enter both ends of the water distribution pipe 4 at the same time, so that the end pipe diameter of the water inlet main pipe can be reduced while ensuring the same water delivery volume, which is conducive to reducing the occupation of the height space in the pool.

[0038] In addition, the water distribution pipeline in this embodiment also includes a delivery pipe 7 connected to the water inlet pipe 3 to deliver sewage into the water inlet pipe 3. During operation, the treated water enters the water inlet pipe 3 from the delivery pipe 7, enters the water distribution pipe 4 from the water 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 delivery pipe 7 is fixed to and communicated with the water inlet pipe 3 , and the other end of the delivery pipe 7 passes through the light filler area and the water outlet area in sequence and extends to the outside of the aerobic pool 1 .

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

[0041] 1. The aerator 5 is arranged in the water distribution pipe 4 to merge the aeration pipeline with the gas distribution pipeline, which can effectively reduce the impact of the aerated gas on the lightweight filler 2 in the pool and reduce the wear of the lightweight filler 2 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. Reduce the pipeline design in the pool and increase the effective working space in the pool.

[0043] 3. By designing the position and structure of the water distribution hole 41, the smoothness of gas discharge can be effectively guaranteed, 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 providing a pipe joint 6 at the end of the aerator 5 and making the pipe joint 6 detachably mounted on the outer wall of the aerobic tank 1, this structural design allows the aeration pipe to be directly arranged outside the aerobic tank 1 and to form a detachable connection with the aerator 5, and at the same time, the aerator 5 can also be directly withdrawn from the outside of the aerobic tank 1, which can avoid the cumbersome steps of removing the lightweight filler when inspecting the aeration pipe or the aerator 5. The maintenance workload and maintenance cost of the equipment are greatly reduced.

[0045] Example 1

[0046] In this embodiment, the type of sewage to be treated is sewage from a river, and the main parameters of the influent water quality are ammonia nitrogen, COD, BOD, total phosphorus, etc. The designed influent volume of the river water is 5000m3 / d, and the designed influent water quality standard is ammonia nitrogen ≤8mg / L, COD ≤110mg / L, BOD ≤45mg / L, and total phosphorus ≤1.3mg / L. The designed effluent water quality standard is surface quasi-IV water, that is, ammonia nitrogen ≤1.5mg / L, COD ≤30mg / L, BOD ≤6mg / L, and total phosphorus ≤0.3mg / L.

[0047] After pretreatment, the sewage enters the water distribution pipe 4 through the water inlet pipe 3 in the aerobic pool water and air distribution system, and then enters the aerobic pool 1 through the water distribution holes 41 on the water distribution pipe 4. The aerated gas enters the water distribution pipe 4 through the aerator 5, and then enters the pool through the water distribution holes 41 on the water distribution pipe 4.

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

[0049] Example 2

[0050] After about one year of operation, the volume of the lightweight fillers 2 in multiple aerobic pools 1 in the aerobic pool water and air distribution system was tested. It was found that the loss rate of the lightweight fillers 2 in the aerobic pool 1 in the aerobic pool water and air distribution system was about 2.7-6.8%, and the average loss rate was 4.7%.

[0051] The lightweight filler 2 is then added back to each system. After half a year of operation, the volume of the lightweight filler 2 of the system is tested again. The test shows that the loss rate of the lightweight filler 2 is about 3.8-8.5%, with an average loss rate of 6.1%.

[0052] From the above two tests, it can be seen that when the aerobic pool water and air distribution system proposed by the present 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 loss rate of lightweight filler in the traditional perforated pipe water and air distribution method is about 5.9-11.3% in one year, and the average loss rate is 9.6%; the loss rate of lightweight filler in one and a half years is about 8.3-16.8%, and the average loss rate is 13.2%.

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

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An aerobic pool water and air distribution system, characterized in that: include: an aerobic pool (1), and a water distribution pipeline and an air distribution pipeline, wherein: The aerobic pool (1) comprises a water and gas distribution area, a light filler area located above the water and gas distribution area, and a water outlet area located above the light filler area; The water distribution pipeline comprises a water inlet pipe (3) and a water distribution pipe (4) having water distribution holes (41) on its surface; the water distribution pipe (4) is laid in the water and gas distribution area and connected to the water inlet pipe (3); The air distribution pipeline comprises an aerator (5), and the aerator (5) is located in the water distribution pipe (4).

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

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

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 pool water and air distribution system according to claim 1, characterized in that: A pipe joint (6) is installed at the air inlet end of the aerator (5), and the pipe joint (6) is detachably installed on the outer wall of the aerobic tank (1); Preferably, the gas distribution pipeline also includes an aeration pipe for conveying gas to the aerator (5), the aeration pipe is located outside the aerobic tank (1) and connected to the pipe joint (6) to form a connection with the aerator (5); Preferably, the aerobic tank (1) is a box structure.

6. The aerobic pool water and air distribution system according to claim 5, characterized in that: The side wall on one side of the water inlet pipe (3) constitutes a part of the outer wall of the aerobic pool (1), and the pipe joint (6) is detachably mounted on the water inlet pipe (3).

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

8. The aerobic pool water and air distribution system according to claim 1, characterized in that: Two water inlet pipes (3) are provided and are arranged separately, and the side surfaces of the two water inlet pipes (3) that are away from each other respectively constitute a part of the outer wall of the aerobic pool (1); a plurality of water distribution pipes (4) are provided, and all water distribution pipes (4) are located between the two water inlet pipes (3) and are arranged at intervals along the length direction of the water inlet pipes (3), and the two water inlet pipes (3) are fixed and connected at both ends of each water distribution pipe (4), and each water distribution pipe (4) is equipped with an aerator (5) corresponding to it.

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

10. An aerobic pool water and gas distribution system according to any one of claims 1 to 6, characterized in that: The aerator (5) adopts a single-hole membrane aerator; Preferably, the water outlet area is provided with a water outlet channel (8) and a water outlet weir (9).

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