Gas stripping and backflow integrated treatment device

Abstract

The utility model discloses a gas stripping and backflow integrated treatment device, and relates to the field of sewage treatment. The gas stripping and backflow integrated treatment device comprises a treatment shell, an anoxic zone, an aerobic zone and a secondary sedimentation zone are arranged in the treatment shell, an aeration pipe is arranged in the aerobic zone, and a water distribution unit and a backflow unit are arranged between the anoxic zone and the aerobic zone; the water distribution unit comprises a water distributor and a water distribution pipe, and the top end of the water distribution pipe is connected with the water distributor; and the backflow unit comprises a gas stripping backflow cover and a gas stripping backflow pipe. According to the gas stripping and backflow integrated treatment device, the gas stripping backflow pipe is used for lifting a mud-water mixture in the aerobic zone to the water distributor, the density difference of liquid inside and outside the gas stripping backflow pipe is used as lifting power until the mud-water mixture is lifted to the water distributor, the gas stripping power disappears, and the mud-water mixture and incoming water enter the anoxic zone under the action of gravity; a sludge reflux pump is omitted, mixed liquid flows back, and the aeration rate is fully utilized.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment equipment, in particular to an air-lift and reflux integrated treatment device. Background Technique

[0002] Aeration in sewage treatment is a key process. It mainly transfers oxygen in the air to the sewage through aeration equipment to meet the oxygen demand for the metabolism of aerobic microorganisms and promote the full mixing of sewage and activated sludge, so as to achieve the purpose of biological treatment.

[0003] During the aeration process of existing equipment, generally, a water pump is used to circulate the mixed liquid. After aeration, the remaining aeration volume is directly discharged and cannot be utilized. At the same time, when using a sludge reflux pump, the power consumption of the mixed liquid reflux pump is large, the utilization of the aeration volume is insufficient, and the power consumption of the fan is large. Therefore, this application proposes an air-lift and reflux integrated treatment device. Content of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model provides an air-lift and reflux integrated treatment device, which solves the problems that in the process of aeration of existing equipment, generally, a water pump is used to circulate the mixed liquid, the remaining aeration volume after aeration is directly discharged and cannot be utilized, at the same time, when using a sludge reflux pump, the power consumption of the mixed liquid reflux pump is large, the utilization of the aeration volume is insufficient, and the power consumption of the fan is large.

[0005] To achieve the above purposes, the utility model is realized through the following technical solutions: an air-lift and reflux integrated treatment device, including a treatment housing, an anoxic zone, an aerobic zone and a secondary sedimentation zone are arranged inside the treatment housing, an aeration pipe is arranged inside the aerobic zone, and a water distribution unit and a reflux unit are arranged between the anoxic zone and the aerobic zone;

[0006] The water distribution unit includes a water distributor and a water distribution pipe. The water distributor is fixedly installed at the top of the anoxic zone. The top end of the water distribution pipe is connected to the water distributor, and the bottom end of the water distribution pipe extends towards the bottom of the anoxic zone;

[0007] The reflux unit includes an air-lift reflux hood and an air-lift reflux pipe. The air-lift reflux hood is arranged inside the aerobic zone. The two ends of the air-lift reflux pipe are respectively connected to the water distribution pipe and the top of the air-lift reflux hood.

[0008] Preferably, the aeration pipe includes an air inlet pipe and a horizontal pipe. The top end of the air inlet pipe passes through the treatment housing and extends outwards and is connected to a fan. The bottom end of the air inlet pipe is connected to the horizontal pipe, and a plurality of aeration heads are arranged on the outer side of the horizontal pipe.

[0009] Preferably, a water outlet pipe is arranged on the outer side of the treatment housing, and the water outlet pipe is connected to the secondary sedimentation zone.

[0010] Preferably, a first partition plate and a second partition plate are installed inside the treatment housing, and the air-lift reflux hood is fixedly connected to the second partition plate.

[0011] Preferably, a water inlet pipe is arranged outside the water distributor, and the end of the water inlet pipe passes through the outside of the treatment housing and extends outward.

[0012] The utility model discloses an integrated air-lift reflux treatment device, and the beneficial effects thereof are as follows:

[0013] During the use of the integrated air-lift reflux treatment device, sewage enters the water distributor and is distributed to the bottom of the anoxic zone through the water distribution pipe. The water flow rises and enters the aerobic zone, then rises through the bottom of the secondary sedimentation zone and is discharged. At the same time, the sludge enters the secondary sedimentation zone after passing through the bottom of the secondary sedimentation zone. Since there is no aeration in the secondary sedimentation zone, the sludge has sedimentation properties, and the sludge and water will be separated during the upward movement in the secondary sedimentation zone. The sludge slides back into the aerobic zone through the bottom hopper of the secondary sedimentation zone. Since there is aeration in the aerobic zone, the fallen sludge quickly mixes with the sewage to form a sludge-water mixture. At this time, after aeration in the aerobic zone, the sludge-water mixture rises mixed with bubbles. When passing through the air-lift reflux hood, the air-lift reflux pipe is used to lift the sludge-water mixture in the aerobic zone to the water distributor. The density difference between the inside and outside of the air-lift reflux pipe is used as the lifting power. Until it reaches the water distributor, the air-lift power disappears, and under the action of gravity, it enters the anoxic zone together with the incoming water. By using the air-lift reflux principle, the sludge return pump and the mixed liquor return are omitted, and the aeration volume is fully utilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0015] Figure 1 It is a schematic structural diagram of the present utility model;

[0016] Figure 2 It is a schematic structural diagram of the reflux unit and the second partition plate of the present utility model;

[0017] Figure 3 It is a schematic structural diagram of the aeration pipe of the present utility model.

[0018] In the figure: 1. Treatment housing; 11. Anoxic zone; 12. Aerobic zone; 13. Secondary sedimentation zone; 14. Aeration pipe; 141. Air inlet pipe; 142. Horizontal pipe; 15. Outlet pipe; 16. First partition board; 17. Second partition board; 2. Water distribution unit; 21. Water distributor; 22. Water distribution pipe; 23. Inlet pipe; 3. Return unit; 31. Air-lift return hood; 32. Air-lift return pipe. Specific embodiments

[0019] To better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0020] An embodiment of the present utility model discloses an air-lift return integrated treatment device. According to the attached Figures 1-3 shown, it includes a treatment housing 1. An anoxic zone 11, an aerobic zone 12, and a secondary sedimentation zone 13 are arranged inside the treatment housing 1. An aeration pipe 14 is arranged inside the aerobic zone 12, and a water distribution unit 2 and a return unit 3 are arranged between the anoxic zone 11 and the aerobic zone 12;

[0021] The water distribution unit 2 includes a water distributor 21 and a water distribution pipe 22. The water distributor 21 is fixedly installed at the top of the anoxic zone 11. The top end of the water distribution pipe 22 is connected to the water distributor 21, and the bottom end of the water distribution pipe 22 extends towards the bottom of the anoxic zone 11;

[0022] The return unit 3 includes an air-lift return hood 31 and an air-lift return pipe 32. The air-lift return hood 31 is arranged inside the aerobic zone 12. The two ends of the air-lift return pipe 32 are respectively connected to the water distribution pipe 22 and the top of the air-lift return hood 31.

[0023] During the use process, sewage enters the water distributor 2 and is distributed to the bottom of the anoxic zone 11 through the water distribution pipe 22. The water flow rises into the aerobic zone 12 and then rises through the bottom of the secondary sedimentation zone 13 and is discharged. At the same time, the sludge enters the secondary sedimentation zone 13 after passing through the bottom of the secondary sedimentation zone 13. Since there is no aeration in the secondary sedimentation zone 13, the sludge has sedimentation properties, and the mud and water will be separated during the rising process in the secondary sedimentation zone 13. The sludge slides back into the aerobic zone 12 through the bottom hopper of the secondary sedimentation zone 13. Since there is aeration in the aerobic zone 12, the falling sludge quickly mixes with the sewage to form a mud-water mixture. At this time, after aeration in the aerobic zone 12, the mud-water mixture and the bubbles mix and rise. When passing through the air-lift return hood 31, the mud-water mixture in the aerobic zone 12 is lifted to the water distributor 2 by using the air-lift return pipe 32. The density difference between the inside and outside of the air-lift return pipe 32 is used as the lifting power. Until it reaches the water distributor 2, the air-lift power disappears, and under the action of gravity, it enters the anoxic zone 11 together with the incoming water. By using the air-lift return principle, the sludge return pump and the mixed liquor return are omitted, and the aeration volume is fully utilized.

[0024] Specifically disclosed, the aeration pipe 14 includes an air inlet pipe 141 and a horizontal pipe 142. The top end of the air inlet pipe 141 extends outward through the treatment housing 1 and is connected to a blower. The bottom end of the air inlet pipe 141 is connected to the horizontal pipe 142, and a plurality of aeration heads are provided on the outer side of the horizontal pipe 142.

[0025] When the external blower is working, it can input the external air into the air inlet pipe 141 and enter the horizontal pipe 142, and the plurality of aeration heads provided on the outer side of the horizontal pipe 142 perform the aeration work.

[0026] Further, a water outlet pipe 15 is provided on the outer side of the treatment housing 1, and the water outlet pipe 15 is connected to the secondary sedimentation area 13.

[0027] By providing the water outlet pipe 15, it is convenient to discharge the treated water outward.

[0028] Further, a first partition plate 16 and a second partition plate 17 are installed inside the treatment housing 1, and the air-lift reflux hood 31 is fixedly connected to the second partition plate 17.

[0029] By providing the first partition plate 16 and the second partition plate 17, the interior of the treatment housing 1 can be divided into an anoxic zone 11, an aerobic zone 12, and a secondary sedimentation area 13.

[0030] Further, a water inlet pipe 23 is provided on the outer side of the water distributor 21, and the end of the water inlet pipe 23 passes through the outer side of the treatment housing 1 and extends outward.

[0031] During the use process, the sewage enters the water distributor 21 through the water inlet pipe 23 and is distributed to the bottom of the anoxic zone 11 through the water distribution pipe 22. The water flow rises and enters the aerobic zone 12, then rises through the bottom of the secondary sedimentation area 13 and is discharged. At the same time, the sludge enters the secondary sedimentation area 13 after passing through the bottom of the secondary sedimentation area 13. Since there is no aeration in the secondary sedimentation area 13, the sludge has sedimentation properties, and the mud and water will be separated during the rising process in the secondary sedimentation area 13. The water flows out through the water outlet pipe 15, while the sludge slides back into the aerobic zone 12 through the bottom hopper of the secondary sedimentation area 13. Since there is aeration in the aerobic zone 12, the fallen sludge quickly mixes with the sewage to form a mud-water mixture;

[0032] At this time, after the aerobic zone 12 is aerated, the mud-water mixture rises mixed with the bubbles. When passing through the air-lift reflux hood 31, the mud-water mixture in the aerobic zone 12 is lifted to the water distributor 21 by using the air-lift reflux pipe 32. The density difference between the inner and outer liquids of the air-lift reflux pipe 32 is used as the lifting power. Until it reaches the water distributor 21, the air-lift power disappears, and under the action of gravity, it enters the anoxic zone 11 together with the incoming water. By using the air-lift reflux principle, the sludge reflux pump and the mixed liquid reflux are omitted, and the aeration volume is fully utilized.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above-mentioned embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An air-lift reflux integrated treatment device, comprising a treatment housing (1), characterized in that, The interior of the treatment housing (1) is provided with an anoxic zone (11), an aerobic zone (12), and a secondary sedimentation zone (13). An air diffuser pipe (14) is arranged inside the aerobic zone (12). A water distribution unit (2) and a reflux unit (3) are arranged between the anoxic zone (11) and the aerobic zone (12); The water distribution unit (2) includes a water distributor (21) and a water distribution pipe (22). The water distributor (21) is fixedly installed at the top of the anoxic zone (11). The top end of the water distribution pipe (22) is connected to the water distributor (21), and the bottom end of the water distribution pipe (22) extends towards the bottom of the anoxic zone (11); The reflux unit (3) includes an air-lift reflux hood (31) and an air-lift reflux pipe (32). The air-lift reflux hood (31) is arranged inside the aerobic zone (12). The two ends of the air-lift reflux pipe (32) are respectively connected to the water distribution pipe (22) and the top of the air-lift reflux hood (31).

2. The integrated air-lift reflux treatment device according to claim 1, characterized in that, The air diffuser pipe (14) includes an air inlet pipe (141) and a horizontal pipe (142). The top end of the air inlet pipe (141) passes through the treatment housing (1) and extends outwards and is connected to a blower. The bottom end of the air inlet pipe (141) is connected to the horizontal pipe (142), and a plurality of aeration nozzles are arranged on the outer side of the horizontal pipe (142).

3. The integrated air stripping and reflux treatment device according to claim 1, characterized in that, An outlet pipe (15) is arranged on the outer side of the treatment housing (1), and the outlet pipe (15) is connected to the secondary sedimentation zone (13).

4. The integrated air stripping and reflux treatment device according to claim 1, wherein A first partition plate (16) and a second partition plate (17) are installed inside the treatment housing (1), and the air-lift reflux hood (31) is fixedly connected to the second partition plate (17).

5. The integrated air stripping and reflux treatment device according to claim 1, characterized in that, A water inlet pipe (23) is arranged on the outer side of the water distributor (21), and the end of the water inlet pipe (23) passes through the outer side of the treatment housing (1) and extends outwards.

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