Intermittent aeration energy-saving AAO biochemical pool

Abstract

The utility model discloses an intermittent aeration energy-saving AAO (anaerobic-anoxic-oxic) biochemical pool which comprises an anaerobic pool, an anoxic pool and an aerobic pool which are connected in sequence, an intermittent aeration device is arranged in the aerobic tank; the aerobic tank comprises an aerobic tank I, an aerobic tank II, an aerobic tank III and an aerobic tank IV in sequence; the intermittent aeration device comprises an aeration main pipe, an aeration branch pipe I, an aeration branch pipe II, an aeration branch pipe III and an aeration branch pipe IV; the aeration main pipe is connected with the aeration branch pipe I, the aeration branch pipe II, the aeration branch pipe III and the aeration branch pipe IV; the aeration branch pipe I, the aeration branch pipe II, the aeration branch pipe III and the aeration branch pipe IV are respectively arranged in the aerobic tank I, the aerobic tank II, the aerobic tank III and the aerobic tank IV; the aeration branch pipe I, the aeration branch pipe II, the aeration branch pipe III and the aeration branch pipe IV are respectively provided with an aeration head and a valve II; a valve I is arranged on the aeration main pipe. According to the utility model, the aeration rate is increased, the denitrification reaction environment is better, and the denitrification efficiency is obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an intermittently aerated energy-saving AAO biochemical pool. Background Art

[0002] The core treatment unit of a sewage treatment plant is biochemical treatment, and the most widely used method is activated sludge. Activated sludge undergoes different reactions under different conditions, and secondary treatment mostly uses the AAO (biological denitrification and phosphorus removal) process and its improved derivative processes. During the operation of a sewage plant, aerobic tanks usually use intermittent aeration to better achieve TN removal effects while reducing energy consumption.

[0003] At present, the traditional intermittent aeration system has the problem of insufficient aeration volume, which leads to a decrease in the sewage treatment effect. Moreover, after the aeration head of the existing intermittent aeration system is used for a long time, impurities in the sewage are easy to flow into the inside of the aeration hole, causing blockage. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an energy-saving AAO biochemical pool with intermittent aeration, which increases the aeration volume, improves the denitrification reaction environment, and significantly improves the denitrification efficiency.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: an intermittently aerated energy-saving AAO biochemical pool, comprising an anaerobic pool, an anoxic pool and an aerobic pool connected in sequence, wherein an intermittent aeration device is arranged in the aerobic pool; the aerobic pool comprises an aerobic pool 1, an aerobic pool 2, an aerobic pool 3 and an aerobic pool 4 in sequence; the intermittent aeration device comprises an aeration main pipe, an aeration branch pipe 1, an aeration branch pipe 2, an aeration branch pipe 3 and an aeration branch pipe 4; the aeration main pipe and the aeration branch pipe are connected in sequence; the aerobic pool comprises an aerobic pool 1, an aerobic pool 2, an aerobic pool 3 and an aerobic pool 4 in sequence ... aeration branch pipe 1, aeration branch pipe 2, aeration branch pipe 3 and aeration branch pipe 4 are connected; the aeration branch pipe 1, aeration branch pipe 2, aeration branch pipe 3 and aeration branch pipe 4 are respectively arranged in aerobic pool 1, aerobic pool 2, aerobic pool 3 and aerobic pool 4, and aeration branch pipe 1, aeration branch pipe 2, aeration branch pipe 3 and aeration branch pipe 4 are all provided with aeration heads; the aeration main pipe is provided with valve 1; the aeration branch pipe 1, aeration branch pipe 2, aeration branch pipe 3 and aeration branch pipe 4 are all provided with valve 2.

[0006] Furthermore, a plurality of aeration pipes are arranged at equal intervals on each aeration branch pipe.

[0007] Furthermore, the aeration pipe comprises a horizontal pipe and a vertical pipe; and aeration heads are arranged on both the horizontal pipe and the vertical pipe.

[0008] Furthermore, the aeration head includes an outer shell and a microporous filter membrane; the outer shell includes an inner shell and an outer shell; a microporous filter membrane is arranged between the inner shell and the outer shell; the inner shell is a hollow semicircular structure, and a pipe connected to the semicircular structure is arranged below the inner shell; a plurality of air holes 1 are arranged on the semicircular structure; and air holes 2 are arranged on the outer shell.

[0009] Furthermore, a protective shell is arranged on the outside of the outer shell; a third air hole is arranged on the protective shell; a sliding sleeve is arranged on the pipeline; the sliding sleeve is fixedly connected to the protective shell; a telescopic spring is arranged between the sliding sleeve and the inner shell; a protrusion matching the second air hole is arranged on the outside of the outer shell.

[0010] Furthermore, a gas outlet is provided on the aeration branch pipe; and the air inlet pipe is threadedly connected to the gas outlet.

[0011] The beneficial effects of the utility model are:

[0012] 1) The intermittent aeration device provided in the utility model performs intermittent aeration on each aerobic pool by controlling valve 2, thereby increasing the aeration volume, providing a better denitrification reaction environment for intermittent aeration, and significantly improving the denitrification efficiency.

[0013] 2) The utility model can reduce the clogging of aeration holes by setting the aeration head structure, and prevent the clogging of microporous filter membrane, thereby increasing the service life of the microporous filter membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a structural schematic diagram of embodiment 1 of the utility model.

[0016] Figure 2 A schematic diagram of the aeration head structure.

[0017] Figure 3 This is a schematic diagram of the structure of Example 2 of the utility model.

[0018] Figure 4 Schematic diagram of aeration pipe. DETAILED DESCRIPTION

[0019] The technical solution of the utility model will be clearly and completely described below through specific implementation methods.

[0020] refer to Figure 1 and Figure 2 , which is an intermittently aerated energy-saving AAO biochemical pool of the utility model, comprises an anaerobic pool 1, an anoxic pool 2 and an aerobic pool connected in sequence, and an intermittent aeration device is arranged in the aerobic pool.

[0021] The aerobic pools of this embodiment include an aerobic pool 1 31, an aerobic pool 2 32, an aerobic pool 3 33 and an aerobic pool 4 34 in sequence.

[0022] The intermittent aeration device of this embodiment includes an aeration main pipe 41 , an aeration branch pipe 1 42 , an aeration branch pipe 2 43 , an aeration branch pipe 3 44 and an aeration branch pipe 4 45 .

[0023] The aeration main pipe 41 is connected with the aeration branch pipe 1 42, the aeration branch pipe 2 43, the aeration branch pipe 3 44 and the aeration branch pipe 4 45, and the aeration branch pipe 1 42, the aeration branch pipe 2 43, the aeration branch pipe 3 44 and the aeration branch pipe 4 45 are respectively arranged in the aerobic pool 1 31, the aerobic pool 2 32, the aerobic pool 3 33 and the aerobic pool 4 34, and the aeration branch pipe 1 42, the aeration branch pipe 2 43, the aeration branch pipe 3 44 and the aeration branch pipe 4 45 are all provided with aeration heads; the aeration main pipe 41 is provided with a valve 1 46; the aeration branch pipe 1 42, the aeration branch pipe 2 43, the aeration branch pipe 3 44 and the aeration branch pipe 4 45 are all provided with valve 2 47.

[0024] In this embodiment, the operation time and intermittent time of the aeration device in each aerobic tank are individually controlled by opening and closing the valve 2 47 provided on the aeration branch pipe; intermittent aeration provides a better denitrification reaction environment and significantly improves the denitrification efficiency.

[0025] The aeration head of this embodiment includes an outer shell and a microporous filter membrane 52; the outer shell includes an inner shell 511 and an outer shell 512; the microporous filter membrane 52 is arranged between the inner shell 511 and the outer shell 512; the inner shell 511 is a hollow semicircular structure, and a pipe 513 connected to the semicircular structure is arranged below the inner shell 511; a plurality of air holes 514 are arranged on the semicircular structure; and air holes 515 are arranged on the outer shell 512.

[0026] In this embodiment, a protective shell 6 is arranged on the outside of the outer shell 512; an air hole 3 517 is arranged on the protective shell 6; a sliding sleeve 518 is arranged on the pipe 513; the sliding sleeve 518 is fixedly connected to the protective shell 6; a telescopic spring 519 is arranged between the sliding sleeve 518 and the inner shell 511; a protrusion 520 matching the air hole 2 515 is arranged on the outside of the outer shell 512. Example

[0027] like Figure 3 and 4 As shown, in this embodiment, a plurality of aeration pipes 48 are evenly spaced on each aeration branch pipe. The aeration pipes include a horizontal pipe 481 and a vertical pipe 482; an aeration head 5 is disposed on both the horizontal pipe and the vertical pipe.

[0028] In this embodiment, a plurality of aeration pipes 48 are provided to further optimize the nitrification reaction environment and improve the ammonia nitrogen removal effect.

[0029] Preferably, in this embodiment, a gas outlet is provided on the aeration branch pipe; the air inlet pipe is threadedly connected to the gas outlet, so as to facilitate replacement of the aeration head.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the protection scope of the technical solution of the present invention.

Claims

1. An intermittently aerated energy-saving AAO biochemical pool, comprising an anaerobic pool (1), an anoxic pool (2) and an aerobic pool connected in sequence, characterized in that: An intermittent aeration device is arranged in the aerobic pool; the aerobic pool comprises an aerobic pool 1 (31), an aerobic pool 2 (32), an aerobic pool 3 (33) and an aerobic pool 4 (34) which are connected in sequence; the intermittent aeration device comprises an aeration main pipe (41), an aeration branch pipe 1 (42), an aeration branch pipe 2 (43), an aeration branch pipe 3 (44) and an aeration branch pipe 4 (45); the aeration main pipe (41) is connected to the aeration branch pipe 1 (42), the aeration branch pipe 2 (43), the aeration branch pipe 3 (44) and the aeration branch pipe 4 (45); the aeration branch pipe 1 (42), the aeration branch pipe 2 (43), the aeration branch pipe 3 (44) and the aeration branch pipe 4 (45); The second aeration pipe (43), the third aeration branch pipe (44) and the fourth aeration branch pipe (45) are respectively arranged in the first aerobic pool (31), the second aerobic pool (32), the third aerobic pool (33) and the fourth aerobic pool (34), and the first aeration branch pipe (42), the second aeration branch pipe (43), the third aeration branch pipe (44) and the fourth aeration branch pipe (45) are all provided with aeration heads; the aeration main pipe (41) is provided with a valve first (46); the first aeration branch pipe (42), the second aeration branch pipe (43), the third aeration branch pipe (44) and the fourth aeration branch pipe (45) are all provided with valve second (47).

2. The intermittently aerated energy-saving AAO biochemical pool according to claim 1, characterized in that: A plurality of aeration pipes (48) are arranged at equal intervals on each aeration branch pipe.

3. The intermittently aerated energy-saving AAO biochemical pool according to claim 2, characterized in that: The aeration pipe comprises a horizontal pipe (481) and a vertical pipe (482); an aeration head (5) is provided on both the horizontal pipe and the vertical pipe.

4. The intermittently aerated energy-saving AAO biochemical pool according to claim 3, characterized in that: The aeration head (5) comprises an outer shell and a microporous filter membrane (52); the outer shell comprises an inner shell (511) and an outer shell (512); a microporous filter membrane (52) is arranged between the inner shell (511) and the outer shell (512); the inner shell (511) is a hollow semicircular structure, and a pipe (513) connected to the semicircular structure is arranged below the inner shell (511); a plurality of air holes (514) are arranged on the semicircular structure; and air holes (515) are arranged on the outer shell (512).

5. The intermittently aerated energy-saving AAO biochemical pool according to claim 4, characterized in that: A protective shell (516) is arranged outside the outer shell (512); a third air hole (517) is arranged on the protective shell (516); a sliding sleeve (518) is arranged on the pipeline (513); the sliding sleeve (518) is fixedly connected to the protective shell (516); a telescopic spring (519) is arranged between the sliding sleeve (518) and the inner shell (511); and a protrusion (520) matching the second air hole (515) is arranged on the outer side of the outer shell (512).

6. The intermittently aerated energy-saving AAO biochemical pool according to claim 2, characterized in that: A gas outlet is arranged on the aeration branch pipe; the air inlet pipe is screwed to the gas outlet.

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