A pool aeration system

Abstract

The application provides a pool aeration system, which comprises an aeration tank, an aeration fan, an air distribution pipeline, a circulating mechanism, a micro-nano bubble generator and an aeration loop pipeline. The air distribution pipeline is used for air inlet and is installed at the outlet of the aeration fan, and the bottom of the air distribution pipeline is located at 1.5 m-2 m below the water level of the water body. The circulating mechanism is arranged on the aeration tank and is used for pumping away the mixed liquid composed of air and the water body between the bottom of the air distribution pipeline and the water level of the water body. The micro-nano bubble generator is used for making micro-nano bubbles, is installed outside the aeration tank, and is communicated with the circulating mechanism through a liquid inlet. The aeration loop pipeline is laid on the bottom of the aeration tank and is communicated with the micro-nano bubble generator, and an aeration branch pipe is arranged on the aeration loop pipeline. The aeration fan has zero load start, low cost and long service life, and the maintenance of the aeration disc is avoided in long-term operation, so that the maintenance cost is greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, in particular to a pool aeration system. BACKGROUND

[0002] Aeration is an essential process in the process of sewage treatment, especially for industrial wastewater with high pollutant content. Aeration is to forcibly add air to the sewage, so that the sewage in the pool contacts with the air to be oxygenated, and the water body is stirred to accelerate the transfer of oxygen in the air to the water body, prevent the sinking of suspended solids in the pool, and strengthen the contact between organic matter and microorganisms and dissolved oxygen in the pool to oxidize and decompose organic matter in the sewage.

[0003] At present, the widely used sewage aeration method in China is basically the bottom aeration method, which mainly transmits air to the aeration pipeline at the bottom of the pool by a fan (such as an aeration fan, a Roots blower, a rotary blower, etc.), and then uses the aeration holes on the aeration pipeline (such as setting a microporous aeration disc on the aeration pipeline or directly perforating the aeration pipeline, etc.) to make small air bubbles, which uniformly disperse the air into the water body, thereby realizing water body oxygenation and using the oxygen in the air to decompose harmful substances in the water body to achieve the purpose of sewage treatment.

[0004] The Chinese invention patent with the application number CN202111074472.8, "Sewage treatment aeration tank system", its technical solution is to use the air blown by the aeration fan to drive the lifting mechanism to slide along the elongation direction of the main aeration pipeline, to lift the activated sludge at the bottom of the aeration tank body, thereby preventing the sinking of suspended solids in the sewage; the Chinese invention patent with the application number CN202011627912.3, "BAF aeration pipe and BAF denitrification and COD removal method", its technical solution is to set two rows of aeration holes above the aeration branch pipe to improve the aeration amount and aeration uniformity, thereby improving the effect of sewage treatment; the Chinese utility model patent with the application number CN201721749329.3, "Novel aerator", its technical solution is to install aeration discs on the upper side and the lower side of the aeration pipe, and the aeration discs simultaneously aerate upward and downward after the fan blows air into the aeration pipe, thereby increasing the aeration effect.

[0005] The existing related technologies have the following technical defects:

[0006] 1. Because the tank contains activated sludge, when the aeration tank system is shut down, the activated sludge will settle to the bottom of the aeration tank and bury the aeration holes, thereby blocking the aeration holes. When the aeration tank is reactivated, sufficient compressed air is required to blow up the sludge covering the aeration holes and evenly suspend them in the water. When the fan is started, if air is supplied directly to the underwater, the starting load is relatively large. Moreover, before the air is discharged from the aeration head, the air flow at the fan outlet is updated slowly, and the temperature rise is higher, which can easily cause the compression performance of the fan to decrease or damage the fan. In addition, as the depth of the aeration tank increases, the fan outlet pressure also increases. When the aeration tank is deep (depth over 6 meters), a high-power high-pressure fan is required to provide sufficient pressure. The cost, operation cost, and maintenance cost of the high-pressure fan are all high, making the overall cost higher. At the same time, as the depth of the aeration tank increases, the starting load of the fan will be greater when it is started next time after the system is shut down. It is easy for the fan pressure to be unable to flush out the sludge blocking the aeration holes, resulting in uneven aeration in this part.

[0007] 2. Aeration discs commonly have the problem of air membrane tearing, membrane failure or blockage. Aeration discs may be damaged or cracked due to factors such as sludge blockage and their own materials. First, the possibility of sludge blockage is further increased. Second, their maintenance and replacement are extremely cumbersome. The current main maintenance method is to drain the sewage in the aeration tank to 5-10 cm from the bottom of the aeration disc, and then repair and replace the aeration disc. This maintenance method greatly affects the normal operation of the overall process and may even stop it from running. Summary of the Invention

[0008] In response to the deficiencies in the prior art, the present invention provides a water pool aeration system, which solves the problems in the prior art such as high fan cost, large starting load, difficulty in flushing out sludge blocked in the aeration holes by the fan pressure as the depth of the pool increases, and extremely cumbersome maintenance and replacement of the aeration disc, which affects the normal operation of the overall process.

[0009] According to an embodiment of the present invention, a water pond aeration system includes an aeration tank having a rectangular cross-section and an open top, and further includes:

[0010] An aeration fan, the outlet of which is equipped with an air distribution pipe extending into the water body of the aeration tank, the air distribution pipe is used to introduce air, and the bottom of the air distribution pipe is located 1.5m-2m below the water level;

[0011] A circulation mechanism is provided on the aeration tank and is used to extract the mixture of air and water between the bottom of the air distribution pipe and the water level line;

[0012] The micro-nano bubble generator is used for making micro-nano bubbles from the mixed liquid drawn by the circulating mechanism, is installed outside the aeration tank, and is communicated with the circulating mechanism through a liquid inlet;

[0013] An aeration loop pipeline is laid at the bottom of the aeration tank, is communicated with the liquid outlet of the micro-nano bubble generator, and is provided with aeration branch pipes communicated with the aeration tank.

[0014] Further, the aeration pipeline comprises an aeration loop pipeline and aeration branch pipes, the aeration loop pipeline is in a rectangular frame structure and is horizontally arranged, the aeration loop pipeline is communicated with the outlet of the aeration fan, the aeration branch pipes are evenly distributed at the bottom of the aeration loop pipeline, and each aeration branch pipe is perpendicular to the aeration loop pipeline, one end of the aeration branch pipe is communicated with the aeration loop pipeline, and the other end of the aeration branch pipe is communicated with the aeration tank.

[0015] Further, the circulating mechanism comprises a circulating water pump and a circulating water distribution pipeline, the circulating water distribution pipeline is in a rectangular frame structure and is horizontally arranged at the bottom of the aeration branch pipe, a plurality of water distribution branch pipes are evenly arranged on the circulating water distribution pipeline, the water distribution branch pipes correspond to the aeration branch pipes one by one, the water distribution branch pipes are vertically fixed at the top of the circulating water distribution pipeline, one end of the water distribution branch pipe is communicated with the aeration tank, and the other end of the water distribution branch pipe is communicated with the circulating water distribution pipeline, the circulating water pump is located outside the aeration tank, the water inlet of the circulating water pump is communicated with the circulating water distribution pipeline, and the water outlet of the circulating water pump is communicated with the liquid inlet of the micro-nano bubble generator.

[0016] Further, the water distribution branch pipes are arranged at intervals from the corresponding aeration branch pipes, and the top end of the water distribution branch pipe is located above the bottom end of the aeration branch pipe.

[0017] Further, the side wall of the aeration tank is provided with a first support table and a second support table, the first support table is located above the second support table, and both are located on the same side of the aeration tank, the circulating water pump is arranged on the first support table, and the micro-nano bubble generator is arranged on the second support table.

[0018] Further, the top of the aeration tank is provided with a third support table, and the aeration fan is arranged on the third support table.

[0019] The technical principle of the present application is that the aeration fan is used to aerate the water body 1.5-2 m below the water level line of the aeration tank, so that the part of the water body is oxygenated, at the same time, the circulating mechanism is used to deliver the oxygenated water body to the micro-nano bubble generator, so as to generate micro-nano bubbles, the micro-nano bubbles are delivered to the aeration loop pipeline at the bottom of the tank under the joint action of the circulating mechanism and the micro-nano bubble generator, and the whole water body is oxygenated.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The air distribution pipe extends into the shallow water level position in the aeration tank, which greatly reduces the outlet pressure of the aeration fan, allowing the aeration fan to start at zero load and use a low-power aeration fan, thereby significantly saving the energy consumption and cost of the aeration fan and extending the service life of the aeration fan;

[0022] 2. A micro-nano bubble generator is used to replace the existing aeration holes to produce small bubbles. Under the action of the circulation mechanism and the micro-nano bubble generator, the mixture of micro-nano bubbles and water is sufficient to flush away the sludge settled on the aeration loop pipe, and the aeration loop pipe will not be blocked, making the aeration tank aeration more uniform and optimizing the system operation effect. At the same time, there is no need to install an aeration plate on the aeration loop pipe, so that this aeration system does not need to repair the aeration plate during long-term operation, greatly reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] In the above drawings: 1. aeration tank; 2. water body; 21. water level line; 3. aeration fan; 4. air distribution loop pipe; 5. air distribution branch pipe; 6. circulating water distribution pipe; 7. water distribution branch pipe; 8. circulating water pump; 9. micro-nano bubble generator; 10. aeration loop pipe; 11. aeration branch pipe; 12. first support platform; 13. second support platform; 14. third support platform; 15. first water pipe; 16. second water pipe; 17. third water pipe; 18. air pipe. DETAILED DESCRIPTION

[0025] The technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 As shown, an embodiment of the present invention provides a water pond aeration system, including an aeration tank 1, wherein the aeration tank 1 has a rectangular cross-section and an open top, and further includes:

[0027] The aeration fan 3 has an outlet equipped with an air distribution pipe extending into the water body 2 of the aeration tank 1. The air distribution pipe is used to introduce air, and the bottom of the air distribution pipe is located 1.5m-2m below the water level 21 of the water body 2;

[0028] A circulation mechanism is provided on the aeration tank 1 and is used to extract the mixed liquid consisting of air and water body 2 between the bottom of the air distribution pipe and the water level 21 of the water body 2;

[0029] A micro-nano bubble generator 9 is arranged outside the aeration tank 1 and is connected to the circulating mechanism for generating micro-nano bubbles from the mixed liquid drawn by the circulating mechanism.

[0030] An aeration loop pipeline 10 is arranged at the bottom of the aeration tank 1 and is connected to the micro-nano bubble generator 9, and the aeration loop pipeline 10 is provided with aeration branch pipes 11 connected to the aeration tank 1.

[0031] In the embodiment, the aeration fan 3 can be a vortex fan, a rotary fan or a Roots fan. The aeration fan 3 is used to aerate the water body 2 at a position 1.5-2 m below the water level line 21 of the aeration tank 1, so that the water body 2 is oxygenated. Meanwhile, the oxygenated water body 2 is delivered to the micro-nano bubble generator 9 by the circulating mechanism, so that micro-nano bubbles are generated. The micro-nano bubbles are delivered to the aeration loop pipeline 10 at the bottom of the tank body under the joint action of the circulating mechanism and the micro-nano bubble generator 9, so that the whole water body 2 is oxygenated. The air distribution pipe is arranged in the water body 2 at a shallow liquid level position in the aeration tank 1, which greatly reduces the outlet pressure of the aeration fan 3, so that the aeration fan 3 can be started at zero load and a small-power aeration fan 3 can be used, thereby greatly saving the energy consumption and cost of the aeration fan 3 and prolonging the service life of the aeration fan 3. The micro-nano bubble generator 9 is used to replace the existing aeration hole to generate small bubbles. Under the action of the circulating mechanism and the micro-nano bubble generator 9, the mixed liquid of the generated micro-nano bubbles and water is sufficient to flush away the sludge deposited on the aeration loop pipeline 10, so that the aeration loop pipeline 10 is not blocked, the aeration of the aeration tank 1 is more uniform, the system operation effect is optimized, and the aeration disc does not need to be arranged on the aeration loop pipeline 10, so that the aeration system is free from the maintenance of the aeration disc in long-term operation, thereby greatly reducing the maintenance cost.

[0032] As shown in Figure 1 , the air distribution pipeline includes an air distribution loop pipe 4 and air distribution branch pipes 5. The air distribution loop pipe 4 is arranged in a rectangular frame structure and horizontally. The air distribution loop pipe 4 is connected to the outlet of the aeration fan 3 through a vertically arranged air guide pipe. The air distribution branch pipes 5 are evenly distributed at the bottom of the air distribution loop pipe 4 and are perpendicular to the air distribution loop pipe 4, so that the air outlet of each air distribution branch pipe 5 is uniform. One end of the air distribution branch pipe 5 is connected to the air distribution loop pipe 4, and the other end is connected to the aeration tank 1. In the embodiment, the air distribution loop pipe 4 is arranged above the water level line 21, and the air distribution branch pipe 5 extends into the water level line 21 by 1.5-2 m. The air distribution pipeline can be fixed by angle steel or channel steel. The angle steel or channel steel is arranged as a support beam at the top of the aeration tank 1, and the air distribution pipeline is fixed by a clamp or a U-shaped clamp.

[0033] As Figure 1 shown in the figure, the circulating mechanism comprises a circulating water pump 8 and a circulating water distribution pipe 6, the circulating water distribution pipe 6 is in a rectangular frame structure and is horizontally installed at the bottom of the air distribution branch pipe 5, a plurality of water distribution branch pipes 7 are evenly arranged on the circulating water distribution pipe 6, the water distribution branch pipes 7 correspond to the air distribution branch pipes 5 one by one, the water distribution branch pipes 7 are vertically fixed at the top of the circulating water distribution pipe 6, one end of the water distribution branch pipes 7 is in communication with the aeration tank 1, and the other end of the water distribution branch pipes 7 is in communication with the circulating water distribution pipe 6, the circulating water pump 8 is located outside the aeration tank 1, the water inlet of the circulating water pump 8 is in communication with the circulating water distribution pipe 6, and the water outlet of the circulating water pump 8 is in communication with the liquid inlet of the micro-nano bubble generator 9. In this embodiment, a circulating water pump 8 with large flow and high head is used, the air distribution loop pipe 4 is connected and fixed at the bottom of the air distribution branch pipe 5 by a hoop or a U-shaped clamp, the circulating water pump 8 and the air distribution loop pipe 4 are in communication through a first water guide pipe 15, the first water guide pipe 15 is horizontally arranged and penetrates the side wall of the aeration tank 1, the two ends of the water guide pipe are in communication with one side of the circulating water distribution pipe 6 and the water inlet of the circulating water pump 8 respectively, the circulating water pump 8 and the micro-nano bubble generator 9 are in communication through a second water guide pipe 16, and the two ends of the second water guide pipe 16 are in communication with the water outlet of the circulating water pump 8 and the liquid outlet of the micro-nano bubble generator 9 respectively.

[0034] As Figure 1 shown in the figure, the water distribution branch pipes 7 are arranged at intervals with the corresponding air distribution branch pipes 5, and the top end of the water distribution branch pipes 7 is located above the bottom end of the air distribution branch pipes 5. In this embodiment, the horizontal distance between the water distribution branch pipes 7 and the corresponding air distribution branch pipes 5 is 50 cm, and the vertical distance between the top end of the water distribution branch pipes 7 and the bottom end of the air distribution branch pipes 5 is 50 cm.

[0035] As Figure 1 shown in the figure, the side wall surface of the aeration tank 1 is provided with a first support table 12 and a second support table 13, the first support table 12 is located above the second support table 13, and both are located on the same side of the aeration tank 1, the circulating water pump 8 is installed on the first support table 12, and the micro-nano bubble generator 9 is installed on the second support table 13.

[0036] As Figure 1As shown, the aeration loop pipeline 10 is in a rectangular frame structure and is horizontally arranged, the aeration branch pipes 11 are several, the several aeration branch pipes 11 are uniformly distributed on the top of the aeration loop pipeline 10, and each aeration branch pipe 11 is perpendicular to the aeration loop pipeline 10, the aeration branch pipe 11 corresponds to the water distribution branch pipe 7 one by one, so that the aeration branch pipe 11 is uniformly aerated. In the embodiment, the aeration loop pipeline 10 and the micro-bubble generator are communicated through the third water guide pipe 17, one end of the third water guide pipe 17 is communicated with the liquid outlet of the micro-bubble generator, the other end of the third water guide pipe 17 penetrates through the side wall of the aeration tank 1 and is communicated with one side of the aeration loop pipeline 10. Similarly, angle steels or channel steels can be arranged at the bottom of the aeration tank 1 as support beams, and the aeration loop pipeline 10 is installed and fixed by a clamp or a U-shaped clamp.

[0037] As shown in the figure, Figure 1 The aeration tank 1 is provided with a third support table 14 at the top, the two ends of the third support table 14 are supported on the top surfaces of the two side walls of the aeration tank 1 respectively, and the aeration fan 3 is installed on the third support table 14. No machine room needs to be built for the aeration fan 3, which can reduce the land occupation area of the aeration system.

[0038] In the above embodiment, when the system is running, the aeration tank 1 discharges treated wastewater on one side and introduces untreated wastewater on the other side, so that the water body 2 in the aeration tank 1 maintains balance, and the water level line 21 remains unchanged. When the aeration tank 1 is long, multiple aeration fans 3 can be used to aerate the aeration tank 1, and the specific number is determined according to actual needs. The multiple aeration fans 3 are distributed at equal intervals along the length direction of the aeration tank 1. Similarly, the circulating water pump 8 and the micro-nano bubble generator 9 also correspond to the aeration fan 3 one by one, and multiple aeration fans 3 can also be arranged at equal intervals along the length direction of the aeration tank 1. The aeration tank 1 is fully aerated in a parallel manner, and the aeration is uniform.

[0039] In operation, the aeration fan 3 uniformly introduces air into the water body 2 at a depth of 1.5-2 m through the air distribution pipeline, and the large air bubbles generated diffuse and rise. The large air bubbles are drawn away by the circulating water pump 8 through the circulating water distribution pipeline 6 during the rising process, and then the mixture of the large air bubbles and the water body 2 is introduced into the micro-nano bubble generator 9 to generate fine air bubbles. The fine air bubbles are introduced into the bottom of the aeration tank 1 through the aeration loop pipeline 10 under the action of the circulating water pump 8 and the micro-nano bubble generator 9, thereby realizing overall oxygenation of the water body 2. When the system is shut down, the water body 2 self-irrigates from the top to the bottom to fill the entire pipeline, including the circulating water distribution pipeline 6, the water distribution branch pipeline 7, the first water guide pipeline 15, the second water guide pipeline 16, the third water guide pipeline 17, the aeration loop pipeline 10, and the aeration branch pipeline 11. At this time, the activated sludge is submerged in the aeration branch pipeline 11, thereby entering the aeration branch pipeline 11 and blocking the aeration branch pipeline 11. When the system is started again, under the pressure of the high-flow circulating water pump 8, the sludge blocked in the aeration loop pipeline 10 can be easily flushed away, and the aeration loop pipeline 10 will not be blocked by sludge, so that the aeration of the aeration tank 1 is more uniform, and the system operation effect is optimized. At the same time, the aeration loop pipeline 10 and the aeration branch pipeline 11 are made of stainless steel, and basically do not need to be maintained.

[0040] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A water pond aeration system, comprising an aeration tank (1), wherein the aeration tank (1) has a rectangular cross section and an open top, and is characterized in that: Also includes: An aeration fan (3) is provided at its outlet with an air distribution pipe extending into the water body (2) of the aeration tank (1), the air distribution pipe being used to introduce air, the bottom of the air distribution pipe being located 1.5m-2m below the water level (21) of the water body (2); A circulation mechanism is provided on the aeration tank (1) and is used to extract a mixed liquid consisting of air and water (2) between the bottom of the air distribution pipe and the water level (21) of the water (2); A micro-nano bubble generator (9) is used to generate micro-nano bubbles from the mixed liquid drawn by the circulation mechanism, wherein the micro-nano bubble generator (9) is installed outside the aeration tank (1), and the liquid inlet of the micro-nano bubble generator (9) is connected to the circulation mechanism; and an aeration loop pipe (10) laid at the bottom of the aeration tank (1), the aeration loop pipe (10) being in communication with the liquid outlet of the micro-nano bubble generator (9), and the aeration loop pipe (10) being provided with an aeration branch pipe (11) in communication with the aeration tank (1); The air distribution pipeline comprises an air distribution loop pipe (4) and an air distribution branch pipe (5), the air distribution loop pipe (4) is a rectangular frame structure and is arranged horizontally, the air distribution loop pipe (4) is connected to the outlet of the aeration fan (3), there are a plurality of air distribution branch pipes (5), the plurality of air distribution branch pipes (5) are evenly distributed at the bottom of the air distribution loop pipe (4), and each air distribution branch pipe (5) is perpendicular to the air distribution loop pipe (4), one end of the air distribution branch pipe (5) is connected to the air distribution loop pipe (4), and the other end of the air distribution branch pipe (5) is connected to the aeration tank (1); the circulation mechanism comprises a circulating water pump (8) and a circulating water distribution pipe (6), the circulating water distribution pipe (6) The invention has a rectangular frame structure and is horizontally installed at the bottom of the air distribution branch pipe (5). A plurality of water distribution branch pipes (7) are evenly distributed on the circulating water distribution pipe (6). The water distribution branch pipes (7) correspond to the air distribution branch pipes (5) one by one. The water distribution branch pipes (7) are vertically fixed to the top of the circulating water distribution pipe (6). One end of the water distribution branch pipe (7) is connected to the aeration tank (1), and the other end of the water distribution branch pipe (7) is connected to the circulating water distribution pipe (6). The circulating water pump (8) is located outside the aeration tank (1), and the water inlet of the circulating water pump (8) is connected to the circulating water distribution pipe (6), and the water outlet of the circulating water pump (8) is connected to the liquid inlet of the micro-nano bubble generator (9).

2. A pond aeration system according to claim 1, characterized in that: The water distribution branch pipe (7) is spaced apart from the corresponding air distribution branch pipe (5), and the top end of the water distribution branch pipe (7) is located above the bottom end of the air distribution branch pipe (5).

3. A pond aeration system according to claim 1, characterized in that: A first support platform (12) and a second support platform (13) are provided on the side wall surface of the aeration tank (1); the first support platform (12) is located above the second support platform (13), and the two are located on the same side of the aeration tank (1); the circulating water pump (8) is installed on the first support platform (12), and the micro-nano bubble generator (9) is installed on the second support platform (13).

4. A pond aeration system according to claim 1, characterized in that: The aeration loop pipe (10) is in a rectangular frame structure and is arranged horizontally. There are a plurality of aeration branch pipes (11), which are evenly distributed on the top of the aeration loop pipe (10). Each aeration branch pipe (11) is perpendicular to the aeration loop pipe (10), and the aeration branch pipes (11) correspond one to one with the water distribution branch pipes (7).

5. A pond aeration system according to claim 1, characterized in that: A third support platform (14) is provided on the top of the aeration tank (1), and the aeration fan (3) is installed on the third support platform (14).

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