Highly energy-saving oxygen supply device for biochemical sewage treatment

Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a highly energy-saving biochemical sewage treatment oxygen supply device which comprises a shell, a shell cover is detachably mounted at the top of the shell, a water inlet pipe and an air inlet pipe are fixedly mounted at the top of the shell cover, and an air and liquid entraining pipe is fixedly mounted at the bottom of the shell. The water inlet pipe is communicated with the gas-liquid entraining pipe through the shell and the shell cover, an aeration mechanism is arranged between the shell and the shell cover, the gas inlet pipe is communicated with the gas-liquid entraining pipe through the aeration mechanism, gas enters the aeration mechanism through the gas inlet pipe to be aerated, and bubbles are generated. Bubbles formed after sewage enters the shell through the water inlet pipe to be mixed and aerated are discharged from the gas and liquid entrainment pipe. According to the invention, sewage at the upper layer of the aeration tank is firstly mixed with bubbles generated by the aeration mechanism, the sewage at the upper layer is firstly mixed with oxygen in the bubbles to obtain supplied oxygen, then the bubbles are discharged to the bottom of the aeration tank to be mixed with sewage at the bottom to obtain supplied oxygen, and the process optimizes a traditional oxygen supply mode.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to an oxygen supply device for highly energy-saving biochemical sewage treatment. Background Art

[0002] Urban sewage treatment plants are large energy consumers, with electricity costs accounting for more than half of the treatment costs of sewage treatment plants. The aerobic treatment process is one of the important processes for treating sewage using biochemical treatment methods, and the aeration tank uses the activated sludge method to treat sewage. The tank provides a certain sewage retention time to meet the oxygen required by aerobic microorganisms and the mixing conditions for full contact between sewage and activated sludge. This process is usually achieved through multiple parallel air supply pipes fixed in the aeration tank and an aerator connected to the end of the air supply pipe. The gas in the air supply pipe enters the sewage through the aeration holes of the aerator, forming small floating bubbles. The bubbles are in full contact with the aerobic bacteria in the aeration tank, and the sewage is decomposed and purified through biochemical reactions.

[0003] However, since the conventional aeration device is installed at the bottom of the water, the oxygen content at the bottom of the water is extremely high, while the oxygen content on the water surface is low. Therefore, a highly energy-saving oxygen supply device for biochemical sewage treatment is proposed. Summary of the invention

[0004] In order to solve the shortcomings in the prior art, the present invention proposes a highly energy-saving oxygen supply device for biochemical sewage treatment.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a highly energy-saving oxygen supply device for biochemical sewage treatment, comprising a shell, a shell cover is detachably installed on the top of the shell, a water inlet pipe and an air inlet pipe are fixedly installed on the top of the shell cover, and an air-carrying liquid pipe is fixedly installed on the bottom of the shell, the water inlet pipe and the air-carrying liquid pipe are connected through the shell and the shell cover, an aeration mechanism is installed between the shell and the shell cover, the air inlet pipe is connected with the air-carrying liquid pipe through the aeration mechanism, gas enters the aeration mechanism through the air inlet pipe for aeration and generates bubbles, and the sewage enters the shell through the water inlet pipe, and the bubbles formed after mixing and aeration are discharged from the air-carrying liquid pipe.

[0006] Preferably, the aeration mechanism includes an annular frame, a gathering hood is fixedly installed on the top of the annular frame, a connecting pipe is provided on the top of the gathering hood, the top of the connecting pipe abuts against the bottom of the shell cover, and the connecting pipe is coaxially arranged with the air inlet pipe and connected to each other, a plurality of columns distributed in a circular array are fixedly installed on the bottom of the annular frame, the bottom ends of the plurality of columns abut against the bottom inner wall of the shell, and an aeration disk is installed in the annular frame.

[0007] Preferably, a water pump is fixedly installed in the air-entraining liquid pipe, and a plurality of spiral blades distributed in a circular array are also fixedly installed in the air-entraining liquid pipe, the plurality of spiral blades are located below the aeration mechanism, and the water pump is located below the plurality of spiral blades. During aeration, the water pump is used to pump sewage so that the sewage flows from the water inlet pipe to the air-entraining liquid pipe.

[0008] Preferably, the multiple spiral blades are distributed in a spiral shape, and the top surface of the spiral blades is provided with multiple cutting blades distributed at equal intervals. When the sewage mixed with bubbles passes through the multiple spirally arranged spiral blades, the multiple cutting blades thereon will cut the bubbles into smaller bubbles.

[0009] Preferably, a filter plate is fixedly installed in the air-carrying liquid pipe, and the filter plate is located below the water pump. The filter holes on the filter plate will cut the small bubbles in the sewage again after being cut by multiple cutting blades.

[0010] Preferably, a filtering mechanism is provided in the water inlet pipe, and the filtering mechanism includes a hollow frame fixedly installed in the water inlet pipe and a conical filter cartridge slidably installed in the water inlet pipe. The conical filter cartridge is arranged in a conical shape, and a telescopic rod is fixedly installed at the top center of the hollow frame, and the top end of the piston rod of the telescopic rod is fixedly connected to the conical filter cartridge.

[0011] Preferably, the filtering mechanism also includes an annular cylinder slidably installed in the water inlet pipe, the top of the annular cylinder is fixedly connected to the bottom of the conical filter cylinder, and the inner wall of the water inlet pipe is provided with a plurality of sewage outlets distributed in a circular array. When the telescopic rod is in an extended state, the annular cylinder will block the plurality of sewage outlets, and when the telescopic rod is in a contracted state, the inside and outside of the water inlet pipe will be connected through the plurality of sewage outlets.

[0012] Preferably, the shell and the shell cover are detachably connected by a plurality of bolts distributed in a circumferential array, and a sealing ring is provided between the shell and the shell cover.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention first mixes the upper sewage in the aeration tank with the bubbles generated by the aeration mechanism, so that the upper sewage is first mixed with the oxygen in the bubbles to obtain oxygen supply, and then the bubbles are discharged to the bottom of the aeration tank to mix with the bottom sewage to obtain oxygen supply. This process optimizes the traditional oxygen supply method; 2. The bubbles generated by the aeration mechanism can be cut again through multiple spiral blades, water pumps and filter plates, making the bubbles smaller and thus mixing more fully with the sewage; 3. The sewage entering the shell can be filtered through the filtering mechanism and the filter plate. By changing the rotation direction of the water pump, the bubbles generated by the aeration mechanism can impact the filter plate and the conical filter cartridge. The energy generated during the impact process can dredge the filter plate and the conical filter cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a highly energy-saving oxygen supply device for biochemical sewage treatment proposed by the present invention; Figure 2 An exploded view of a highly energy-saving oxygen supply device for biochemical sewage treatment proposed by the present invention; Figure 3 A side cross-sectional view of a highly energy-saving oxygen supply device for biochemical sewage treatment proposed by the present invention; Figure 4 A side cross-sectional view of an aeration mechanism in an oxygen supply device for biochemical sewage treatment with high energy saving proposed by the present invention; Figure 5 A schematic diagram of the structure of a shell and a plurality of spiral blades in an oxygen supply device for biochemical sewage treatment with high energy saving proposed by the present invention and a partial enlarged diagram; Figure 6 A partial side sectional view of a highly energy-saving oxygen supply device for biochemical sewage treatment proposed by the present invention.

[0015] In the figure: 1. shell; 2. shell cover; 21. bolt; 3. water inlet pipe; 31. sewage outlet; 4. air-carrying liquid pipe; 5. air inlet pipe; 6. aeration mechanism; 61. annular frame; 62. gathering hood; 63. connecting pipe; 64. aeration plate; 65. column; 7. spiral blade; 71. cutting edge; 8. filtering mechanism; 81. hollow frame; 82. telescopic rod; 83. annular cylinder; 84. conical filter cartridge; 9. filter plate; 10. water pump. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Please refer to Figure 1-Figure 6 The present invention provides a technical solution: an oxygen supply device for highly energy-saving biochemical sewage treatment, comprising a shell 1, a shell cover 2 is detachably installed on the top of the shell 1, a water inlet pipe 3 and an air inlet pipe 5 are fixedly installed on the top of the shell cover 2, an air-carrying liquid pipe 4 is fixedly installed on the bottom of the shell 1, the water inlet pipe 3 and the air-carrying liquid pipe 4 are connected through the shell 1 and the shell cover 2, an aeration mechanism 6 is installed between the shell 1 and the shell cover 2, the air inlet pipe 5 is connected with the air-carrying liquid pipe 4 through the aeration mechanism 6, the gas enters the aeration mechanism 6 through the air inlet pipe 5 for aeration and generates bubbles, the sewage enters the shell 1 through the water inlet pipe 3, the bubbles formed after mixing and aeration are discharged from the air-carrying liquid pipe 4.

[0018] The aeration mechanism 6 includes an annular frame 61, a gathering hood 62 is fixedly installed on the top of the annular frame 61, a connecting pipe 63 is provided on the top of the gathering hood 62, the top end of the connecting pipe 63 abuts against the bottom of the shell cover 2, and the connecting pipe 63 is coaxially arranged with the air inlet pipe 5 and connected with each other, a plurality of columns 65 distributed in a circular array are fixedly installed on the bottom of the annular frame 61, the bottom ends of the plurality of columns 65 abut against the bottom inner wall of the shell 1, and an aeration plate 64 is installed in the annular frame 61.

[0019] A water pump 10 is fixedly installed in the air-entraining liquid pipe 4. A plurality of spiral blades 7 distributed in a circular array are also fixedly installed in the air-entraining liquid pipe 4. The plurality of spiral blades 7 are located below the aeration mechanism 6. The water pump 10 is located below the plurality of spiral blades 7. During aeration, the water pump 10 is used to pump sewage so that the sewage flows from the water inlet pipe 3 to the air-entraining liquid pipe 4.

[0020] The multiple spiral blades 7 are distributed in a spiral shape, and the top surface of the spiral blades 7 is provided with multiple cutting blades 71 distributed at equal intervals. When the sewage mixed with bubbles passes through the multiple spirally arranged spiral blades 7, the multiple cutting blades 71 thereon will cut the bubbles into smaller bubbles.

[0021] A filter plate 9 is fixedly installed in the air-carrying liquid pipe 4 . The filter plate 9 is located below the water pump 10 . The filter holes on the filter plate 9 will cut the small bubbles in the sewage again after being cut by multiple cutting blades 71 .

[0022] A filtering mechanism 8 is provided in the water inlet pipe 3, and the filtering mechanism 8 includes a hollow frame 81 fixedly installed in the water inlet pipe 3 and a conical filter cartridge 84 slidably installed in the water inlet pipe 3. The conical filter cartridge 84 is arranged in a conical shape, and a telescopic rod 82 is fixedly installed at the top center of the hollow frame 81, and the top end of the piston rod of the telescopic rod 82 is fixedly connected to the conical filter cartridge 84.

[0023] The filtering mechanism 8 also includes an annular cylinder 83 slidably installed in the water inlet pipe 3, the top of the annular cylinder 83 is fixedly connected to the bottom of the conical filter cylinder 84, and a plurality of sewage outlets 31 distributed in a circular array are opened on the inner wall of the water inlet pipe 3. When the telescopic rod 82 is in an extended state, the annular cylinder 83 will block the plurality of sewage outlets 31, and when the telescopic rod 82 is in a contracted state, the inside and outside of the water inlet pipe 3 will be connected through the plurality of sewage outlets 31.

[0024] The housing 1 and the housing cover 2 are detachably connected via a plurality of bolts 21 distributed in a circumferential array, and a sealing ring is provided between the housing 1 and the housing cover 2.

[0025] In this embodiment: during installation, the device is fixed 10 cm below the water surface of the aeration tank by means of a mounting bracket, and then connected to the air supply pipe through the air inlet pipe 5, and a branch pipe is installed at the bottom end of the air-carrying liquid pipe 4, and the bottom end of the branch pipe is extended to the bottom of the aeration tank; When working, the water pump 10 is started to rotate forward, and the sewage on the surface of the aeration tank will enter the shell 1 through the water inlet pipe 3 and pass through multiple columns 65 to finally enter the air-carrying liquid pipe 4. The air in the air supply pipe enters the gathering hood 62 through the air inlet pipe 5. When the air passes through the aeration disk 64, abundant bubbles will be formed, and the bubbles will mix with the sewage entering the air-carrying liquid pipe 4 from the water inlet pipe 3. When the sewage mixed with bubbles flows from the housing 1 into the air-carrying liquid pipe 4 and passes through the multiple spirally arranged spiral blades 7, the multiple cutting edges 71 thereon will cut the bubbles into smaller bubbles, so that the bubbles and sewage are mixed more fully. After that, when the sewage mixed with bubbles flows through the water pump 10 and the filter plate 9, the blades on the water pump 10 and the filter holes on the filter plate 9 will cut the bubbles in the sewage again, so that the bubbles and sewage are mixed more fully. In the above process, the sewage on the upper layer of the aeration tank is first mixed with the bubbles to dissolve oxygen, and then the upper sewage carries the bubbles to the bottom of the aeration tank, so that the sewage at the bottom of the aeration tank can also be fused with the oxygen in the bubbles. During the above operation, the telescopic rod 82 is in an extended state, the annular cylinder 83 blocks all the sewage outlets 31, and the sewage flowing through the water inlet pipe 3 can be filtered through the conical filter cartridge 84. At this time, most of the dirt is accumulated on the top conical surface of the conical filter cartridge 84. When cleaning the dirt on the conical filter cartridge 84, the telescopic rod 82 is first controlled to shorten, and the annular cylinder 83 no longer blocks multiple sewage outlets 31. At this time, the sewage flowing through the top surface of the conical filter cartridge 84 will flush the conical filter cartridge 84. In this process, the dirt accumulated on the top conical surface of the conical filter cartridge 84 will be flushed from top to bottom by the sewage, and most of the dirt will be discharged from multiple sewage outlets 31. Then, the water pump 10 is controlled to reverse and pump water from the bottom of the aeration tank. The sewage at the bottom of the aeration tank enters the air-carrying liquid pipe 4 through the branch pipe and is then filtered by the filter plate 9. The sewage then flows upward with the bubbles generated by the aeration mechanism 6. The bubbles flowing upward will burst when passing through the conical filter cartridge 84. The bursting bubbles will impact the conical filter cartridge 84, thereby clearing some blocked holes on the conical filter cartridge 84.

[0026] 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. A highly energy-saving oxygen supply device for biochemical sewage treatment, comprising a housing (1), characterized in that: The shell (1) is detachably mounted with a shell cover (2) on the top, a water inlet pipe (3) and an air inlet pipe (5) are fixedly mounted on the top of the shell cover (2), and an air-entraining liquid pipe (4) is fixedly mounted on the bottom of the shell (1), the water inlet pipe (3) and the air-entraining liquid pipe (4) are connected through the shell (1) and the shell cover (2), an aeration mechanism (6) is mounted between the shell (1) and the shell cover (2), the air inlet pipe (5) is connected with the air-entraining liquid pipe (4) through the aeration mechanism (6), gas enters the aeration mechanism (6) through the air inlet pipe (5) to be aerated and generate bubbles, sewage enters the shell (1) through the water inlet pipe (3), is mixed and aerated, and the bubbles formed are discharged from the air-entraining liquid pipe (4).

2. The highly energy-saving oxygen supply device for biochemical sewage treatment according to claim 1 is characterized in that: The aeration mechanism (6) comprises an annular frame (61), a gathering hood (62) is fixedly mounted on the top of the annular frame (61), a connecting pipe (63) is provided on the top of the gathering hood (62), the top end of the connecting pipe (63) is in contact with the bottom of the shell cover (2), and the connecting pipe (63) and the air inlet pipe (5) are coaxially arranged and communicate with each other, a plurality of columns (65) distributed in a circumferential array are fixedly mounted on the bottom of the annular frame (61), the bottom ends of the plurality of columns (65) are in contact with the bottom inner wall of the shell (1), and an aeration disc (64) is installed in the annular frame (61).

3. The highly energy-saving oxygen supply device for biochemical sewage treatment according to claim 1 is characterized in that: A water pump (10) is fixedly installed in the air-entraining liquid pipe (4). A plurality of spiral blades (7) distributed in a circumferential array are also fixedly installed in the air-entraining liquid pipe (4). The plurality of spiral blades (7) are located below the aeration mechanism (6). The water pump (10) is located below the plurality of spiral blades (7). During aeration, the water pump (10) is used to pump sewage so that the sewage flows from the water inlet pipe (3) to the air-entraining liquid pipe (4).

4. The highly energy-saving oxygen supply device for biochemical sewage treatment according to claim 1 is characterized in that: The plurality of spiral blades (7) are distributed in a spiral shape, and the top surface of the spiral blade (7) is provided with a plurality of cutting blades (71) distributed at equal intervals. When sewage mixed with bubbles passes through the plurality of spirally arranged spiral blades (7), the plurality of cutting blades (71) thereon will cut the bubbles into smaller bubbles.

5. The highly energy-saving oxygen supply device for biochemical sewage treatment according to claim 1 is characterized in that: A filter plate (9) is fixedly installed in the gas-carrying liquid pipe (4), and the filter plate (9) is located below the water pump (10). The filter holes on the filter plate (9) will cut the small bubbles in the sewage again after being cut by the multiple cutting blades (71).

6. The highly energy-saving oxygen supply device for biochemical sewage treatment according to claim 1 is characterized in that: A filter mechanism (8) is provided in the water inlet pipe (3), the filter mechanism (8) comprising a hollow frame (81) fixedly mounted in the water inlet pipe (3) and a conical filter cartridge (84) slidably mounted in the water inlet pipe (3), the conical filter cartridge (84) being arranged in a conical shape, a telescopic rod (82) being fixedly mounted at the center of the top of the hollow frame (81), the top end of the piston rod of the telescopic rod (82) being fixedly connected to the conical filter cartridge (84).

7. The highly energy-saving oxygen supply device for biochemical sewage treatment according to claim 6, characterized in that: The filtering mechanism (8) further comprises an annular cylinder (83) slidably mounted in the water inlet pipe (3); the top of the annular cylinder (83) is fixedly connected to the bottom of the conical filter cylinder (84); a plurality of sewage outlets (31) distributed in a circular array are provided on the inner wall of the water inlet pipe (3); when the telescopic rod (82) is in an extended state, the annular cylinder (83) blocks the plurality of sewage outlets (31); when the telescopic rod (82) is in a retracted state, the inside and outside of the water inlet pipe (3) are connected via the plurality of sewage outlets (31).

8. The highly energy-saving oxygen supply device for biochemical sewage treatment according to claim 1 is characterized by: The housing (1) and the housing cover (2) are detachably connected via a plurality of bolts (21) distributed in a circumferential array, and a sealing ring is provided between the housing (1) and the housing cover (2).

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