Sewage treatment aeration device

Abstract

The utility model relates to a sewage treatment aeration device. The bottom of the aeration tank is provided with a conical bottom, the top of the aeration tank is provided with a conical top, a drain opening is formed in the bottom of the conical bottom, an exhaust opening is formed in the top of the conical top, and an air inlet is formed in the bottom of the side wall of the aeration tank; a flow mixing assembly is mounted at the top of an inner cavity of the aeration tank and comprises an outer frame which is fixedly connected with the aeration tank through a bracket, a plurality of spoilers are mounted in the outer frame in parallel, a water spraying pipe is mounted at the upper part of a space between the adjacent spoilers, and a gas spraying pipe is mounted at the lower part of the space; a central stand column is installed in the center of an inner cavity of the aeration tank, an upper mixer is installed on the upper portion of the central stand column, a middle mixer is installed in the middle of the central stand column, a lower mixer is installed on the lower portion of the central stand column, and an air inlet pipe for conveying air to the flow mixing assembly and a water inlet pipe for conveying sewage to the flow mixing assembly and all the mixers are installed on the side wall of the aeration tank; an air supply assembly and a water supply assembly are further included. According to the utility model, disturbance is applied to sewage, so that the contact flow mixing effect between the sewage and air is improved, and a better aeration effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment facilities, and in particular relates to a sewage treatment aeration device. Background Art

[0002] Aeration in sewage treatment refers to the use of certain methods and equipment to force air into the sewage, so that the sewage in the pool contacts the air and is oxygenated, and the sewage is fully stirred, accelerating the transfer of oxygen in the air to the sewage, strengthening the contact between organic matter in the pool and microorganisms and dissolved oxygen, and oxidizing and decomposing organic matter in the sewage. This process of forced oxygenation in sewage, sewage aeration is one of the important measures in sewage treatment.

[0003] Existing sewage aeration systems are typically based on sewage tanks. Aeration lines are laid at the bottom of the tank and aeration nozzles are installed in an array. During operation, the nozzles release air into the sewage water above to achieve aeration. However, the sewage applied by this aeration method is usually static, meaning the sewage is in a static state or slowly flowing within the tank, resulting in less than ideal aeration results. Therefore, it is necessary to develop and design new aeration facilities for sewage treatment. Utility Model Content

[0004] The purpose of the utility model is to provide a sewage treatment aeration device, which exerts a disturbing effect on sewage, improves the contact and mixing effect between sewage and air, and achieves a better aeration effect.

[0005] The technical solution adopted by the utility model is as follows: a sewage treatment aeration device, comprising an aeration tank with a conical bottom and a conical top, a drain port being provided at the bottom of the conical bottom, an exhaust port being provided at the top of the conical top, and an air inlet being provided at the bottom of the side wall of the aeration tank; a mixed flow component being installed at the top of the inner cavity of the aeration tank, the mixed flow component comprising an outer frame fixedly connected to the aeration tank by a bracket, a plurality of spoilers being installed in parallel within the outer frame, a water spray pipe being installed at the upper part of the space between adjacent spoilers, and an air jet pipe being installed at the lower part of the space; a central column being installed at the center of the inner cavity of the aeration tank, an upper mixer being installed at the upper part of the central column, a middle mixer being installed at the middle part, and a lower mixer being installed at the lower part of the central column; an air inlet pipe for conveying air to the mixed flow component and a water inlet pipe for conveying sewage to the mixed flow component and each mixer being installed on the side wall of the aeration tank; and an air supply component and a water supply component are also included.

[0006] Preferably, a water spray hole is provided at the bottom of the pipe wall of the water spray pipe, and an air jet hole is provided at the top of the pipe wall of the air jet pipe. Multiple water spray pipes are connected to a water spray main pipe, and multiple air jet pipes are connected to an air jet main pipe, and the air jet main pipe is connected to the air intake pipe.

[0007] Preferably, the upper mixer includes an upper outer cylinder with a sealed bottom, an upper inner cylinder with a side wall having a water outlet provided in the middle of the upper outer cylinder, and an upper outer frame, with upper swirl blades installed between the upper outer cylinder and the upper outer frame.

[0008] Preferably, the central mixer includes a central outer cylinder with a sealed bottom, a central inner cylinder with a side wall having a water outlet provided in the middle of the central outer cylinder, and a central outer frame, with central swirl blades installed between the central outer cylinder and the central outer frame.

[0009] Preferably, the lower mixer includes a lower outer cylinder with a sealed bottom, a lower inner cylinder with a side wall having a water outlet provided in the middle of the lower outer cylinder, and a lower outer frame, with lower swirl blades installed between the lower outer cylinder and the lower outer frame.

[0010] Preferably, the central column is a three-section column, the upper section is located between the upper outer tube and the middle outer tube, the middle section is located between the middle outer tube and the lower outer tube, and the lower section is located between the lower outer tube and the conical bottom, and multiple connecting plates are installed between the lower end of the central column and the conical bottom.

[0011] Preferably, the water inlet pipe includes an upper water inlet pipe, a middle water inlet pipe and a lower water inlet pipe, the upper water inlet pipe is connected to the water spray main pipe, the middle water inlet pipe is connected to the upper inner cylinder, and the lower water inlet pipe is connected to the middle inner cylinder.

[0012] Preferably, the air supply component includes an air compressor and a blower, the air compressor is connected to the air inlet pipe through a pipeline, and the outlet of the blower is connected to the air inlet; the water supply component includes a sewage pump and a water diversion valve, the water diversion valve has multiple outlets and each outlet is connected to the upper water inlet pipe, the middle water inlet pipe and the lower water inlet pipe through a pipeline.

[0013] Preferably, it also includes a sewage tank with a filter baffle inside, the bottom of the aeration tank is fixedly connected to the top wall of the sewage tank and the conical bottom is located inside the tank, on one side of the filter baffle, and the water inlet pipe of the sewage pump is located inside the tank, on the other side of the filter baffle.

[0014] The advantages and positive effects of the utility model are:

[0015] The present invention provides a sewage treatment aeration device. Compared to existing aeration devices, the present invention introduces sewage and air into an aeration tank. At the location of the mixing assembly, the injected sewage and air achieve a better mixing effect. At the locations of the upper, middle, and lower mixers, the sewage and air undergo a swirling mixing effect. Thus, the present invention's sewage treatment aeration device enhances the contact and mixing effect between the sewage and air within the aeration tank by applying a turbulent effect to the sewage and airflow, achieving a superior aeration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0019] Figure 4 yes Figure 2 Schematic diagram of the three-dimensional structure of the components in the bottom;

[0020] Figure 5 yes Figure 2 Schematic diagram of the top view of the mixed flow component;

[0021] Figure 6 yes Figure 2 Schematic diagram of the cross-sectional structure of the mixed flow component.

[0022] In the picture:

[0023] 1. Air compressor; 2. Air inlet; 3. Conical bottom; 4. Drain port; 5. Filter baffle; 6. Sewage tank; 7. Sewage pump; 8. Aeration tank; 8-1. Lower tank body; 8-2. Middle tank body; 8-3. Upper tank body; 9. Water diversion valve; 10. Lower water inlet pipe; 11. Middle water inlet pipe; 12. Upper water inlet pipe; 13. Inspection port; 14. Air inlet pipe; 15. Conical top; 16. Exhaust port; 17. Mixing flow assembly; 17-1. Outer frame; 17-2. Spoiler; 17-3. Spray pipe; 17-4. Jet pipe; 18. Bracket; 19. Upper Upper mixer; 19-1, upper inner tube; 19-2, upper swirl blades; 19-3, upper outer frame; 19-4, upper outer tube; 19-5, upper support rod; 20, middle mixer; 20-1, middle inner tube; 20-2, middle swirl blades; 20-3, middle outer frame; 20-4, middle outer tube; 20-5, middle support rod; 21, lower mixer; 21-1, lower inner tube; 21-2, lower swirl blades; 21-3, lower outer frame; 21-4, lower outer tube; 21-5, connecting hole; 22, center column; 23, connecting plate. DETAILED DESCRIPTION

[0024] In order to further understand the content, features and effects of the present invention, the following embodiments are given to illustrate in detail.

[0025] See Figure 1 and Figure 2The sewage treatment aeration device of the present invention includes an aeration tank 8 with a conical bottom 3 and a conical top 15. A drain port 4 is provided at the bottom of the conical bottom 3, an exhaust port 16 is provided at the top of the conical top 15, and an air inlet 2 is provided at the bottom of the side wall of the aeration tank 8.

[0026] As shown in the figure, the main body of the aeration tank 8 is cylindrical and can be assembled from a lower tank body 8-1, a middle tank body 8-2, and an upper tank body 8-3. The drain port 4 is used to drain the wastewater from the bottom of the tank, while the conical bottom 3 allows the wastewater to converge in the middle. The air inlet 2 is used to introduce large amounts of air into the tank, and the exhaust port 16 is used to discharge the airflow in the tank upward. The conical top 15 allows the airflow to converge in the middle.

[0027] In order to facilitate internal inspection and cleaning of the aeration tank 8 , in this embodiment, multiple inspection ports 13 are provided on the tank body (lower tank body 8 - 1 , middle tank body 8 - 2 and upper tank body 8 - 3 ) and the conical top 15 of the aeration tank 8 .

[0028] A mixing assembly 17 is installed on the top of the inner cavity of the aeration tank 8. The mixing assembly 17 allows a portion of the sewage to mix with the air. Figure 5 and Figure 6 , it can be seen that the mixed flow assembly 17 includes an outer frame 17-1 fixedly connected to the aeration tank 8 by a bracket 18, a plurality of spoilers 17-2 are installed in parallel within the outer frame 17-1, a water spray pipe 17-3 is installed in the upper part of the space between adjacent spoilers 17-2, and an air jet pipe 17-4 is installed in the lower part of the space. In this embodiment, a water spray hole is provided at the bottom of the pipe wall of the water spray pipe 17-3, and an air jet hole is provided at the top of the pipe wall of the air jet pipe 17-4. The multiple water spray pipes 17-3 are connected to a water spray main pipe, and the multiple air jet pipes 17-4 are connected to an air jet main pipe.

[0029] The working principle is as follows: sewage is sprayed downwards, and air is sprayed upwards. In the space between adjacent spoilers 17-2, sewage and air flow generate mixed flow, fully contact each other and achieve aeration effect.

[0030] like Figure 5 and Figure 6 As shown in the figure, the outer frame 17-1 of the mixing assembly 17 is rectangular and vertically continuous. The outer periphery of the bracket 18 is fixedly connected to the inner wall of the aeration tank 8, and a rectangular window is provided in the center, into which the mixing assembly 17 is mounted. The spoilers 17-2 are S-shaped, which increases the length of the mixing channel formed between adjacent spoilers 17-2. Backflow baffles can also be provided on the sides of the spoilers 17-2. The backflow baffles block the sewage ejected into the mixing channel, causing it to collect and drip downward rather than being moved upward by the airflow.

[0031] A central column 22 is mounted at the center of the aeration tank 8's interior. An upper mixer 19 is mounted above, a middle mixer 20 is mounted in the middle, and a lower mixer 21 is mounted below. An air inlet pipe 14, which delivers air to the mixing assembly 17, and water inlet pipes, which deliver wastewater to the mixing assembly 17 and the mixers, are mounted on the sidewalls of the aeration tank 8. The mixing assembly 17's jet manifold is connected to the air inlet pipe 14, transferring airflow to the mixing assembly 17 via the air inlet pipe 14.

[0032] See Figure 2 、 Figure 3 and Figure 4 , we can see that:

[0033] The upper mixer 19 comprises an upper outer cylinder 19-4 with a sealed bottom. An upper inner cylinder 19-1 with a water outlet on its sidewall is located in the middle of the upper outer cylinder 19-4. It also comprises an upper outer frame 19-3, with upper swirl blades 19-2 mounted between the upper outer cylinder 19-4 and the upper outer frame 19-3. Sewage is injected into the upper inner cylinder 19-1 and discharged through the outlet into the upper outer cylinder 19-4. The height of the upper outer cylinder 19-4 is significantly smaller than that of the upper inner cylinder 19-1, allowing the sewage to overflow outside the upper outer cylinder 19-4. Inclined swirl channels are located between adjacent upper swirl blades 19-2, creating a swirl effect as the airflow from bottom to top passes through the upper swirl blades 19-2.

[0034] The central mixer 20 comprises a sealed central outer cylinder 20-4. A central inner cylinder 20-1 with a water outlet on its sidewall is located in the center of the central outer cylinder 20-4. It also includes a central outer frame 20-3, with central swirl blades 20-2 mounted between the central outer cylinder 20-4 and the central outer frame 20-3. Sewage is injected into the central inner cylinder 20-1 and discharged into the central outer cylinder 20-4 through the outlet. The height of the central outer cylinder 20-4 is significantly smaller than that of the central inner cylinder 20-1, allowing the sewage to overflow outside the central outer cylinder 20-4. Inclined swirl channels are located between adjacent central swirl blades 20-2, creating a swirling effect as airflow from bottom to top passes through the central swirl blades 20-2.

[0035] The lower mixer 21 comprises a sealed lower outer cylinder 21-4. A lower inner cylinder 21-1 with a water outlet on its sidewall is located in the middle of the lower outer cylinder 21-4. The lower outer frame 21-3 also includes lower swirl blades 21-2 mounted between the lower outer cylinder 21-4 and the lower outer frame 21-3. Sewage is injected into the lower inner cylinder 21-1 and discharged into the lower outer cylinder 21-4 through the water outlet. The height of the lower outer cylinder 21-4 is significantly smaller than that of the lower inner cylinder 21-1, allowing the sewage to overflow outside the lower outer cylinder 21-4. Adjacent lower swirl blades 21-2 have inclined swirl channels between them, creating a swirl effect when airflow passes through the lower swirl blades 21-2 from bottom to top.

[0036] In order to further enhance the swirl effect on the airflow in the tank and promote the aeration effect, the swirl directions between adjacent swirl blades, that is, between the upper swirl blade 19-2 and the middle swirl blade 20-2, and between the middle swirl blade 20-2 and the lower swirl blade 21-2, can be made opposite.

[0037] like Figure 2 and Figure 3 As shown in , to enhance the structural strength of the internal components, a plurality of upper support rods 19-5 are installed between the upper outer frame 19-3 of the upper mixer 19 and the upper portion of the middle inner tube 20-1 of the middle mixer 20. A plurality of middle support rods 20-5 are installed between the middle outer frame 20-3 of the middle mixer 20 and the upper portion of the lower inner tube 21-1 of the lower mixer 21. Furthermore, an annular wing plate is mounted on the inner wall of the aeration tank 8. Connecting holes 21-5 are provided in the annular wing plate and the lower outer frame 21-3 of the lower mixer 21. Bolts securely connect the annular wing plate to the lower outer frame 21-3.

[0038] In this embodiment, the center column 22 is a three-section column. The upper section is located between the upper outer tube 19-4 and the middle outer tube 20-4, the middle section is located between the middle outer tube 20-4 and the lower outer tube 21-4, and the lower section is located between the lower outer tube 21-4 and the conical bottom 3. A plurality of connecting plates 23 are installed between the lower end of the center column 22 and the conical bottom 3. The connecting plates 23 are used to fix the lower end of the center column 22 to the conical bottom 3 as a whole and to keep the lower end of the center column 22 away from the drain port 4 to prevent it from affecting the downward discharge of sewage from the drain port 4.

[0039] In this embodiment, the water inlet pipe includes an upper water inlet pipe 12, a middle water inlet pipe 11 and a lower water inlet pipe 10. The upper water inlet pipe 12 is connected to the water spray main pipe of the mixed flow component 17, the middle water inlet pipe 11 is connected to the upper inner tube 19-1, and the lower water inlet pipe 10 is connected to the middle inner tube 20-1.

[0040] Of course, it is conceivable that a bottom water inlet pipe can also be provided to connect the bottom water inlet pipe to the lower inner cylinder 21-1. However, since no other mixer is provided below the lower mixer 21, the airflow below does not have a swirl effect, and thus it is also possible not to configure the lower mixer 21 with a bottom water inlet pipe.

[0041] It also includes an air supply component and a water supply component. The air supply component is used to supply air to the mixing component 17 and transport air into the tank through the air inlet 2. The water supply component is used to supply sewage to the mixing component 17, the upper mixer 19 and the middle mixer 20.

[0042] In this embodiment, the air supply assembly includes an air compressor 1 and a blower. The air compressor 1 is connected to the air inlet pipe 14 via a pipeline, and the blower's outlet is connected to the air inlet 2. As a result, the mixed flow assembly 17 receives compressed air in a high-pressure state, thereby achieving a jet mixed flow effect. The main airflow required for aeration is provided by the blower. The water supply assembly includes a sewage pump 7 and a water diversion valve 9. The water diversion valve 9 has multiple outlets, each of which is connected to the upper water inlet pipe 12, the middle water inlet pipe 11, and the lower water inlet pipe 10 via a pipeline. Under the action of the sewage pump 7, a portion of the sewage is supplied to the mixed flow assembly 17 in a pressurized manner from the upper water inlet pipe 12, a portion of the sewage is injected into the upper inner tube 19-1 in a pressurized manner, and another portion of the sewage is injected into the middle inner tube 20-1 in a pressurized manner.

[0043] It also includes a sewage tank 6 with a filter baffle 5 inside, the bottom of the aeration tank 8 is fixedly connected to the top wall of the sewage tank 6, and the conical bottom 3 is located inside the tank, on one side of the filter baffle 5, and the water inlet pipe of the sewage pump 7 is located inside the tank, on the other side of the filter baffle 5. Figure 1 As shown in Figure 1, sewage pump 7 draws sewage from the right side of filter baffle 5. The aerated sewage is discharged through drain port 4 to the left side of filter baffle 5. The sewage in the tank is filtered as it flows through filter baffle 5, trapping particulate matter. Sewage tank 6 should have a sewage inlet and a sewage outlet. Sewage is fed into the tank through the inlet and discharged through the outlet after completing the aeration cycle.

[0044] It is conceivable that, in order to facilitate maintenance and cleaning of the interior of the sewage tank 6, an openable door can be installed on the top, and the door can be opened when necessary.

[0045] Operation process:

[0046] The sewage that has been pre-filtered and has had particulate matter removed is injected into the sewage tank 6, and the sewage pump 7 is started. The sewage pump 7 conveys the sewage in the tank to the mixed flow component 17, the upper mixer 19, and the middle mixer 20 in a pressurized manner. The air compressor 1 and the blower are started. The air compressor conveys compressed air to the mixed flow component 17, and the blower conveys air into the tank through the air inlet 2.

[0047] In the mixing assembly 17, the downwardly ejected sewage and the upwardly ejected air generate a mixing flow, and this part of the sewage eventually converges and drips downward; a portion of the sewage is injected into the upper inner cylinder 19-1 of the upper mixer 19, and then overflows to the outside of the upper outer cylinder 19-4; the other portion of the sewage is injected into the middle inner cylinder 20-1 of the middle mixer 20, and then overflows to the outside of the middle outer cylinder 20-4; the upward airflow passes through the three sets of swirl blades of the lower mixer 21, the middle mixer 20, and the upper mixer 19, respectively generating a swirl effect. The swirl airflow acts on the sewage at various positions in the tank, thereby generating a good disturbance effect on the sewage, improving the contact and mixing effect between the sewage and the air, and achieving a better aeration effect;

[0048] Finally, the air flow in the tank is discharged upward through the exhaust port 16, and the sewage in the tank is discharged downward through the drain port 4 into the sewage tank 6. Under the action of the sewage pump 7, the sewage forms a cycle between the sewage tank 6 and the aeration tank 8. After the aeration treatment process time is reached, the sewage is discharged from the sewage tank 6 and enters the next treatment facility (such as a sedimentation tank, etc.).

Claims

1. A sewage treatment aeration device, characterized by: The invention relates to an aeration tank (8) having a conical bottom (3) at the bottom and a conical top (15) at the top, a drain port (4) at the bottom of the conical bottom (3), an exhaust port (16) at the top of the conical top (15), and an air inlet (2) at the bottom of the side wall of the aeration tank (8); a mixed flow component (17) is installed at the top of the inner cavity of the aeration tank (8), and the mixed flow component (17) includes an outer frame (17-1) fixedly connected to the aeration tank (8) by a bracket (18); a plurality of spoilers (17-2) are installed in parallel in the outer frame (17-1), and adjacent spoilers (17-2) are installed in parallel. 7-2) is installed at the upper part of the space between the aeration tank (8) and the aeration tank (8). A water spray pipe (17-3) is installed at the lower part of the space. A jet pipe (17-4) is installed at the lower part of the space. A central column (22) is installed at the center of the inner cavity of the aeration tank (8). An upper mixer (19) is installed at the upper part of the central column (22), a middle mixer (20) is installed at the middle part, and a lower mixer (21) is installed at the lower part. An air inlet pipe (14) for conveying air to the mixed flow component (17) and a water inlet pipe for conveying sewage to the mixed flow component (17) and each mixer are installed on the side wall of the aeration tank (8). The aeration tank (8) also includes an air supply component and a water supply component.

2. The sewage treatment aeration device according to claim 1, wherein: The bottom of the water spray pipe (17-3) is provided with a water spray hole, and the top of the air jet pipe (17-4) is provided with an air jet hole. A plurality of water spray pipes (17-3) are connected to a water spray main pipe, and a plurality of air jet pipes (17-4) are connected to an air jet main pipe, and the air jet main pipe is connected to the air intake pipe (14).

3. The sewage treatment aeration device according to claim 2, characterized in that: The upper mixer (19) comprises an upper outer cylinder (19-4) with a sealed bottom, an upper inner cylinder (19-1) with a side wall having a water outlet provided in the middle of the upper outer cylinder (19-4), and an upper outer frame (19-3). An upper swirl blade (19-2) is installed between the upper outer cylinder (19-4) and the upper outer frame (19-3).

4. The sewage treatment aeration device according to claim 3, wherein: The middle mixer (20) comprises a middle outer cylinder (20-4) with a sealed bottom, a middle inner cylinder (20-1) with a side wall having a water outlet provided in the middle of the middle outer cylinder (20-4), and a middle outer frame (20-3). Middle swirl blades (20-2) are installed between the middle outer cylinder (20-4) and the middle outer frame (20-3).

5. The sewage treatment aeration device according to claim 4, characterized in that: The lower mixer (21) comprises a lower outer cylinder (21-4) with a sealed bottom, a lower inner cylinder (21-1) with a side wall having a water outlet provided in the middle of the lower outer cylinder (21-4), and a lower outer frame (21-3). A lower swirl blade (21-2) is installed between the lower outer cylinder (21-4) and the lower outer frame (21-3).

6. The sewage treatment aeration device according to claim 5, characterized in that: The central column (22) is a three-section column, wherein the upper section is located between the upper outer cylinder (19-4) and the middle outer cylinder (20-4), the middle section is located between the middle outer cylinder (20-4) and the lower outer cylinder (21-4), and the lower section is located between the lower outer cylinder (21-4) and the conical bottom (3). A plurality of connecting plates (23) are installed between the lower end of the central column (22) and the conical bottom (3).

7. The sewage treatment aeration device according to claim 6, characterized in that: The water inlet pipe comprises an upper water inlet pipe (12), a middle water inlet pipe (11) and a lower water inlet pipe (10); the upper water inlet pipe (12) is connected to the water spray main pipe, the middle water inlet pipe (11) is connected to the upper inner tube (19-1), and the lower water inlet pipe (10) is connected to the middle inner tube (20-1).

8. The sewage treatment aeration device according to any one of claims 1 to 7, characterized in that: The air supply assembly comprises an air compressor (1) and a blower, wherein the air compressor is connected to an air inlet pipe (14) via a pipeline, and the outlet of the blower is connected to an air inlet (2); the water supply assembly comprises a sewage pump (7) and a water diversion valve (9), wherein the water diversion valve (9) has a plurality of outlets, and each outlet is respectively connected to an upper water inlet pipe (12), a middle water inlet pipe (11), and a lower water inlet pipe (10) via a pipeline.

9. The sewage treatment aeration device according to claim 8, characterized in that: The invention also comprises a sewage tank (6) with a filter baffle (5) inside, the bottom of the aeration tank (8) is fixedly connected to the top wall of the sewage tank (6), and the conical bottom (3) is located inside the tank, on one side of the filter baffle (5), and the water inlet pipe of the sewage pump (7) is located inside the tank, on the other side of the filter baffle (5).

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