Circulation aerobic granular sludge device
By designing a circulation aerobic sludge device and a sludge return controller in the sewage treatment system, the problem of sludge return reliance on pump body drive in the prior art is solved, and energy saving and environmental protection of sludge return and system maintenance are achieved.
Patent Information
- Application Number
- CN202421217903.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-05-30
AI Technical Summary
When the concentration of pollutants in incoming water fluctuates, the existing sewage treatment system relies on the pump body drive and pipeline to achieve sludge return, resulting in energy saving and environmental protection issues and increased system maintenance burden.
A circulating aerobic granular sludge device is designed, and a sludge return controller is used to adjust the relative position of the second sludge return port and the first sludge return port to realize the return or elimination of the sludge, avoiding the need for pump body driving.
Without increasing the system maintenance burden, the device achieves the energy-saving and environmental protection goal of sludge return and improves the adaptability and efficiency of the sewage treatment system.
Smart Images
Figure CN222556718U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sewage treatment, in particular to a circulating aerobic granular sludge device. Background Art
[0002] The existing aerobic reaction device mainly includes an anoxic zone, an aerobic zone and a sedimentation zone which are arranged in sequence along the flow path of the sewage. After the raw water of the sewage enters the anoxic zone, it is diluted and mixed with the microorganisms inside it to undergo anoxic reaction. After that, the sewage enters the aerobic zone for aerobic reaction to further remove pollutants in the sewage. After that, the sewage enters the sedimentation zone for sedimentation separation. However, in the sewage treatment process, the concentration of pollutants in the sewage has a certain volatility. When the pollutants in the incoming water are high, more organisms are needed to remove the pollutants. Therefore, the sludge originally discharged from the sedimentation zone will be returned to the anoxic zone. The existing technology mainly relies on the pump body to drive, control and cooperate with the pipeline to achieve the reflux of the sludge. However, such a design is not conducive to energy saving and environmental protection and will increase the burden of system maintenance. Utility Model Content
[0003] Therefore, the technical problem to be solved by the utility model is that when adapting to the fluctuation of pollutant concentration in the incoming water, the prior art mainly relies on the pump body to drive, control and cooperate with the pipeline to achieve the reflux of sludge. However, such a design is not conducive to energy saving and environmental protection and will increase the burden of system maintenance, so a circulating aerobic granular sludge device is provided.
[0004] In order to solve the above technical problems, the technical solution of the utility model is as follows:
[0005] The utility model provides a circulating aerobic granular sludge device, comprising: a body, wherein the interior of the body is provided with an anoxic zone, an aerobic zone and a sedimentation zone arranged along the flow path of the water body; a water body acceleration device, comprising a water inlet ejector and a throat pipe, wherein one end of the water inlet ejector is used to communicate with an external sewage source, and the other end extends into the throat pipe; the throat pipe is arranged in the anoxic zone, and the water entering the throat pipe is released into the anoxic zone at the top end of the throat pipe; a light sludge collecting bucket is arranged in the sedimentation zone, a first sludge return port is arranged on the bucket wall of the light sludge collecting bucket, and a sludge discharge pipe extending to the outside of the body is arranged at the bottom of the light sludge collecting bucket; a sludge return pipe, one end of which is connected to the first sludge return port The main body is connected to the main body at one end, and the other end is connected to the throat; a sludge return controller, one end of which is located outside the main body, and the other end is arranged in the light sludge collecting bucket, and the sludge return controller is located in the light sludge collecting bucket. One end is provided with a second sludge return port adapted to the first sludge return port; wherein, when the first sludge return port and the second sludge return port are aligned with each other, under the action of negative pressure, the sludge in the light sludge collecting bucket enters into the throat through the sludge return controller, the second sludge return port, the first sludge return port and the sludge return pipe; when the first sludge return port and the second sludge return port are staggered with each other, the sludge in the light sludge collecting bucket is discharged through the sludge discharge pipe.
[0006] Furthermore, the sludge return controller includes a handle, a control head and a connecting rod for connecting the two; the handle is located outside the main body; the control head is arranged in the light sludge collection bucket, and the outer peripheral wall of the control head is in contact with the inner peripheral wall of the light sludge collection bucket, the interior of the control head is a hollow cavity, and the top of the control head is an open structure; the second sludge return port is arranged on the outer peripheral wall of the control head, and the second sludge return port is connected to the cavity; wherein, the handle is rotated to align the first sludge return port and the second sludge return port with each other or staggered with each other.
[0007] Furthermore, a diversion channel is provided in the body, located between the anoxic zone and the aerobic zone, for connecting the anoxic zone and the aerobic zone; the diversion channel has an ascending flow channel for making the water body move upward and a descending flow channel for making the water body move downward.
[0008] Furthermore, an aerobic degassing channel is provided in the body, which is provided between the aerobic zone and the sedimentation zone, and the inlet of the aerobic degassing channel is connected with the aerobic zone; the outlet of the aerobic degassing channel is divided into a first branch and a second branch, a part of the water in the aerobic degassing channel enters the anoxic zone through the first branch, and another part of the water in the aerobic degassing channel enters the sedimentation zone through the second branch.
[0009] Furthermore, an aeration device is provided in the aerobic zone, and the aeration device includes: an aerator, which is arranged in the aerobic zone; a premixing hood, which is arranged at the air outlet end of the aerator, and the space between the premixing hood and the aerator forms a first premixing zone; a gap is left between the premixing hood and the aerator to form a first water return port, and the first water return port connects the first premixing zone with the space outside the first premixing zone; wherein the flow area of the release port of the premixing hood is smaller than the flow area of the water inlet of the premixing hood, so as to increase the pressure in the first premixing zone under the aeration state.
[0010] Furthermore, the circulating aerobic granular sludge device also includes a fairing, which is arranged at the release port of the premixing hood, and the end of the fairing away from the premixing hood is a sealing structure, and the inner diameter of the fairing gradually decreases in the direction away from the premixing hood; the space between the fairing and the premixing hood forms a second premixing zone; a gap is left between the fairing and the premixing hood to form a diversion port, and the diversion port connects the second premixing zone with the space outside the second premixing zone.
[0011] Furthermore, a plurality of tooth-shaped openings are arranged at the edge of the fairing opening, and the plurality of tooth-shaped openings are distributed along the circumference of the fairing.
[0012] Furthermore, the circulating aerobic granular sludge device also includes a speed-keeping component, which is arranged between the premixing cover and the fairing, and one end of the speed-keeping component away from the fairing is connected to the release port of the premixing cover.
[0013] Furthermore, a gap is left between the bottom end of the throat pipe and the bottom of the body to form a second water return port, and a portion of the water in the anoxic zone enters the throat pipe through the second water return port.
[0014] Furthermore, an inclined tube separation device and a water outlet trough are provided in the sedimentation area; the inclined tube separation device is arranged downstream of the light sludge collection bucket, and is used for sedimentation separation of the water body; the water outlet trough is arranged downstream of the inclined tube separation device, and is used for collecting the water body after sedimentation separation.
[0015] The technical solution of the utility model has the following advantages:
[0016] The circulating aerobic granular sludge device provided by the utility model is provided with a sludge return controller, which can control whether to perform sludge return by changing the relative position relationship between the second sludge return port on the sludge return controller and the first sludge return port on the light sludge collection bucket. That is, when the first sludge return port and the second sludge return port are aligned with each other, sludge return is performed, and under the action of negative pressure, the sludge in the light sludge collection bucket enters the throat pipe through the sludge return controller, the second sludge return port, the first sludge return port and the sludge return pipe; when the first sludge return port and the second sludge return port are staggered with each other, sludge return is not performed, and the sludge in the light sludge collection bucket is discharged through the sludge discharge pipe. Compared with the prior art, such a setting can realize sludge return without the need for a pump body to provide drive and control, which is more energy-saving and environmentally friendly and does not increase the burden of system maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 It is a schematic diagram of a circulating aerobic granular sludge device in an embodiment of the utility model;
[0019] Figure 2 It is a schematic diagram of a sludge return controller in a circulating aerobic granular sludge device in an embodiment of the utility model;
[0020] Figure 3 It is a schematic diagram of a circulating aerobic granular sludge device in an embodiment of the utility model when used in combination;
[0021] Figure 4 for Figure 3 A schematic diagram of one of the layout methods when the circulating aerobic granular sludge device is used in combination;
[0022] Figure 5 It is a schematic diagram of an aeration device in one embodiment of the utility model;
[0023] Figure 6 is a schematic diagram of an aeration device in another embodiment of the utility model;
[0024] Figure 7 is a schematic diagram of an aeration device in another embodiment of the utility model;
[0025] Figure 8 is a schematic diagram of an aeration device in another embodiment of the utility model;
[0026] Fig. 9 is a schematic diagram of an aeration device in another embodiment of the utility model;
[0027] Fig.10 The figure is a schematic diagram of the placement of the aerator in one embodiment of the utility model.
[0028] Description of reference numerals:
[0029] 1. Main body; 2. Anoxic zone; 3. Aerobic zone; 4. Sedimentation zone; 5. Aerobic degassing channel; 6. Diversion channel; 7. Sludge return controller; 8. Second sludge return port; 9. Control head; 10. Connecting rod; 11. Handle; 12. Sludge return pipe; 13. Light sludge collection bucket; 14. Sludge discharge pipe; 15. Water inlet ejector; 16. Throat; 17. First annular member; 18. Second annular member; 19. Third annular member; 20. Fourth annular member; 21. Fifth annular member; 22. First notch; 23. The second notch; 24, the third notch; 25, the fourth notch; 26, the fifth notch; 27, the sixth notch; 28, the aerator; 29, the premixing hood; 30, the fairing; 31, the speed-retaining part; 32, the first premixing zone; 33, the second premixing zone; 34, the first return water outlet; 35, the second return water outlet; 36, the inclined tube separation device; 37, the water outlet trough; 38, the water outlet pipe; 39, the diversion outlet; 40, the drain pipe; 41, the sewage treatment tank; 42, the main water inlet pipe; 43, the water inlet branch pipe; 44, the baffle; 45, the toothed mouth. DETAILED DESCRIPTION
[0030] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0034] like Figure 1 , Figure 2 As shown, this embodiment provides a circulating aerobic granular sludge device, comprising: a body 1, wherein an anoxic zone 2, an aerobic zone 3 and a sedimentation zone 4 are arranged along the water flow path; a water acceleration device, comprising a water inlet ejector 15 and a throat 16, wherein one end of the water inlet ejector 15 is used to communicate with an external sewage source, and the other end extends into the throat 16; the throat 16 is arranged in the anoxic zone 2, and the water entering the throat 16 is released into the anoxic zone 2 at the top of the throat 16; a light sludge collecting hopper 13 is arranged in the sedimentation zone 4, a first sludge return port is arranged on the bucket wall of the light sludge collecting hopper 13, and a sludge discharge pipe 14 extending to the outside of the body 1 is arranged at the bottom of the light sludge collecting hopper 13; a sludge return pipe 12, a One end of the sludge return port is connected to the first sludge return port, and the other end is connected to the throat 16; the sludge return controller 7 has one end located outside the body 1 and the other end arranged in the light sludge collecting bucket 13, and the sludge return controller 7 is located in the light sludge collecting bucket 13. One end is provided with a second sludge return port 8 adapted to the first sludge return port; wherein, when the first sludge return port and the second sludge return port 8 are aligned with each other, under the action of negative pressure, the sludge in the light sludge collecting bucket 13 enters the throat 16 through the sludge return controller 7, the second sludge return port 8, the first sludge return port and the sludge return pipe 12; when the first sludge return port and the second sludge return port 8 are staggered with each other, the sludge in the light sludge collecting bucket 13 is discharged through the sludge discharge pipe 14. Among them, the relative position relationship between the first sludge return port 8 can be adjusted by rotating one end of the sludge return device inserted into the light sludge collection bucket 13, and the relative position relationship between the first sludge return port 8 can also be adjusted by pulling one end of the sludge return device inserted into the light sludge collection bucket 13.
[0035] The circulating aerobic granular sludge device provided in this embodiment is provided with a sludge return controller 7, which can control whether to return sludge by changing the relative position relationship between the second sludge return port 8 on the sludge return controller 7 and the first sludge return port on the light sludge collection bucket 13. That is, when the first sludge return port and the second sludge return port 8 are aligned with each other, sludge return is performed, and under the action of negative pressure, the sludge in the light sludge collection bucket 13 enters the throat 16 through the sludge return controller 7, the second sludge return port 8, the first sludge return port and the sludge return pipe 12; when the first sludge return port and the second sludge return port 8 are staggered with each other, sludge return is not performed, and the sludge in the light sludge collection bucket 13 is discharged through the sludge discharge pipe 14. Compared with the prior art, such a setting can realize sludge return without the need for a pump body to provide drive and control, which is more energy-saving and environmentally friendly and does not increase the burden of system maintenance.
[0036] Specifically, for example, the body 1 may be a vertical round tank structure. A first annular member 17 is disposed in the body 1, and the first annular member 17 may be disposed concentrically with the body 1. The area inside the first annular member 17 forms an anoxic zone 2, and the area between the outer wall of the first annular member 17 and the inner wall of the body 1 forms an aerobic zone 3, and an aeration device is disposed in the aerobic zone 3. The cross-sectional shape of the body 1 is not limited to a circle, and may also be a square, a hexagon or other polygon.
[0037] Among them, the body 1 is also provided with a light sludge collection bucket 13, a second ring member 18 and a third ring member 19, which are all located in the first ring member 17 and in the upper half of the body 1. The light sludge collection bucket 13, the second ring member 18 and the third ring member 19 are all arranged concentrically with the first ring member 17, and from the inside to the outside are the light sludge collection bucket 13, the second ring member 18 and the third ring member 19 respectively. The inner side wall of the upper half of the first ring member 17, the outer side wall of the third ring member 19 and the outer side wall of the lower half of the second ring member 18 together form an aerobic degassing channel 5, and the inner side wall of the third ring member 19, the outer side wall of the upper half of the second ring member 18 and the outer side wall of the light sludge collection together form a sedimentation area 4, and the formed sedimentation area 4 is located above the anoxic area 2.
[0038] Among them, a first gap 22 is left between the bottom end of the first annular member 17 and the bottom of the body 1, and the first gap 22 is used to connect the anoxic zone 2 with the aerobic zone 3. A second gap 23 is left between the top end of the first annular member 17 and the top of the body 1, and the second gap 23 is used to connect the aerobic zone 3 with the aerobic degassing channel 5. A third gap 24 is left between the end of the lower half of the second annular member 18 and the first annular member 17, and the third gap 24 is used to connect the aerobic degassing channel 5 with the anoxic zone 2. A fourth gap 25 is left between the end of the upper half of the second annular member 18 away from the light sludge collection bucket 13 and the third annular member 19, and the fourth gap 25 is used to connect the aerobic degassing channel 5 with the sedimentation zone 4.
[0039] Among them, the body 1 is also provided with a fourth annular member 20 and a fifth annular member 21, the bottom end of the fourth annular member 20 is connected to the bottom of the body 1, and a fifth notch 26 is left between the top end of the fourth annular member 20 and the outer wall of the first annular member 17. The top end of the fifth annular member 21 is connected to the outer wall of the first annular member 17, and a sixth notch 27 is left between the bottom end of the fifth annular member 21 and the bottom of the body 1. The first annular member 17, the fifth annular member 21 and the sixth annular member together form a diversion channel 6, which is used to connect the anoxic zone 2 and the aerobic zone 3, and the diversion channel 6 includes an upward rising channel and a downward falling channel. When in use, the formation of granular sludge can be promoted by the return of the upper and lower flows, because the rising process is the process of granular sludge rolling and enlarging, and the descending process is the compression and polymerization process of granular sludge.
[0040] Among them, a water inlet ejector 15 and a throat 16 are also provided in the anoxic zone 2. One end of the water inlet ejector 15 is connected to an external sewage source through the water inlet pipe, and the other end extends into the throat 16. The throat 16 is concentrically arranged with the main body 1 in the anoxic zone 2. The top end of the throat 16 extends toward the bottom of the light sludge collection bucket 13 but does not contact it. A gap is left between the bottom end of the throat 16 and the bottom of the main body 1 to form a second water return port 35.
[0041] When in use, the external sewage is accelerated by the water inlet ejector 15 and enters the throat pipe 16. After the water is released at the top of the throat pipe 16, it naturally falls in the anoxic zone 2. Then, a part of the water in the anoxic zone 2 flows back to the throat pipe 16 through the second water return port 35, and another part of the water in the anoxic zone 2 enters the diversion channel 6 through the first gap 22. After the water rises along the diversion channel 6, it passes through the fifth gap 26 and then turns. After the water continues to move downward along the diversion channel 6, it is released to the aerobic zone through the sixth gap 27. 3, under the action of the aeration device and the hydraulic flow, the water in the aerobic zone 3 enters the aerobic degassing channel 5 through the second gap 23, and then the water moves downward along the aerobic degassing channel 5. At the bottom of the aerobic degassing channel 5, the water is divided into a first branch and a second branch. The water in the first branch flows downward through the third gap 24 back to the anoxic zone 2, and the nitrified liquid in this water can be denitrified in the anoxic zone 2. The water in the second branch flows upward through the fourth gap 25 and enters the sedimentation zone 4.
[0042] Among them, a sludge return pipe 12 is also provided in the body 1, a first sludge return port is provided on the bucket wall of the light sludge collecting bucket 13, one end of the sludge return pipe 12 is connected to the first sludge return port, and the other end is connected to the throat pipe 16. For example, the interface between the sludge return pipe 12 and the throat pipe 16 can be provided near the bottom end of the throat pipe 16.
[0043] The main body 1 is also provided with a sludge return controller 7, including a handle 11, a control head 9 and a connecting rod 10 connecting the two. The overall shape of the control head 9 is adapted to the shape of the light sludge collection bucket 13, so that the control head 9 can be inserted into the light sludge collection bucket 13 and the side wall of the control head 9 is kept in contact with the inner wall of the light sludge collection bucket 13. For example, the interior of the control head 9 is a hollow cavity, and the top of the control head 9 is an open structure, and the sludge in the light sludge collection bucket 13 can enter the cavity inside the control head 9 from the top opening of the control head 9. The side wall of the control head 9 is provided with a second sludge return port 8 adapted to the first sludge return port. When the control head 9 rotates along its own axis, the first sludge return port and the second sludge return port 8 can be aligned with each other or staggered relative to each other. When the first sludge return port and the second sludge return port 8 are aligned, the sludge in the light sludge collection bucket 13 can be returned to the anoxic zone 2 through the sludge return pipe 12, thereby realizing the opening or closing of the control sludge return. The bottom end of the control head 9 is an open structure. When the first sludge return port and the second sludge return port 8 are completely staggered, the sludge in the cavity of the control head 9 is discharged from the bottom end. Moreover, the alignment degree of the first sludge return port and the second sludge return port 8 can be controlled according to the concentration of pollutants in the sewage, so as to adjust the amount of sludge return. Among them, the handle 11 is located outside the body 1 and directly above the body 1. The control head 9 located inside the body 1 can be driven to rotate by the handle 11 located outside the body 1.
[0044] The lower half of the first annular member 17 may be recessed inwardly toward the center of the body 1 so that the diameter of the lower half of the first annular member 17 is smaller than that of the upper half, thereby increasing the space of the aerobic zone 3 and improving the aerobic treatment capacity.
[0045] like Figure 5 As shown, the aeration device in the body 1 includes: an aerator 28, which is used to be arranged in the aerobic zone 3 that needs aeration; wherein, a plurality of aerators 28 can be provided, and the aerators 28 can be arranged in a point-like manner in the aerobic zone 3, for example, a plurality of aerators 28 arranged in a point-like manner can be arranged in a ring. The aerators 28 can also be arranged in a strip-like manner in the aerobic zone 3, for example, a plurality of aerators 28 can be arranged in an array in rows or columns. The arrangement of the aerators 28 is not limited to the above two methods, and the actual arrangement of the aerators 28 can be designed as needed. The premixing hood 29 is arranged at the outlet end of the aerator 28, and the space between the premixing hood 29 and the aerator 28 forms the first premixing zone 32; a gap is left between the premixing hood 29 and the aerator 28 to form the first water return port 34, and the first water return port 34 connects the first premixing zone 32 with the space outside the first premixing zone 32; wherein, the flow area of the release port of the premixing hood 29 is smaller than the flow area of the water inlet of the premixing hood 29, so as to increase the pressure in the first premixing zone 32 under the aerated state. For example, the premixing hood 29 can be a truncated cone structure, with both upper and lower ends open, the large end at the bottom, the small end at the top, and the small end used as a release port. For another example, the premixing hood 29 can also be a prism-shaped structure, with both upper and lower ends open, the large end at the bottom, the small end at the top, and the small end used as a release port. The premixing hood 29 can be welded to the side wall of the aerobic zone 3 by setting a connecting rod on the side wall; or it can be installed as an integrated structure with the air pipe bracket of the aerator 28 and fixed on the air pipe bracket of the aerator 28.
[0046] The aerator 28 releases air in the first premixing zone 32. As the bubbles rise rapidly, the water outside the first premixing zone 32 will be driven into the first premixing zone 32 through the first water return port 34. In addition, the release port just above the premixing cover 29 is reduced in diameter, which increases the pressure in the first premixing zone 32, so that the bubbles are further mixed with the water flowing back through the first water return port 34. Due to the increase in pressure, the mixing effect will be better. The mixed gas-water mixture is ejected through the release port and rises to the aerobic zone 3 outside the first premixing zone 32. This arrangement allows the aeration device to increase the concentration of dissolved oxygen by reflux, mixing and pressurizing dissolved gas when in use, and is more efficient and energy-saving under the same aeration conditions.
[0047] like Figure 6As shown, the aeration device further comprises a fairing 30, which is arranged at the release port of the premixing hood 29, and the end of the fairing 30 away from the premixing hood 29 is a sealing structure, and the inner diameter of the fairing 30 gradually decreases in the direction away from the premixing hood 29; the space between the fairing 30 and the premixing hood 29 forms a second premixing zone 33; a gap is left between the fairing 30 and the premixing hood 29 to form a diversion port 39, and the diversion port 39 connects the second premixing zone 33 with the space outside the second premixing zone 33. Wherein, the fairing 30 can be welded to the side wall of the aerobic zone 3 by setting a connecting rod on the side wall. For example, the fairing 30 can be a conical structure with the top of the cone on the top. For another example, the premixing hood 29 can also be a prismatic structure with a smaller top surface on the top. Wherein, the shape of the fairing 30 is adapted to the shape of the premixing hood 29, for example, when the premixing hood 29 is a truncated cone structure, the fairing 30 can be a conical structure. For example, when the premixing cover 29 is a prism-shaped structure, the fairing 30 can be a prism-shaped structure. When in use, the gas-water mixture in the first premixing zone 32 enters the second premixing zone 33 through the release port of the premixing cover 29, and the gas-water mixture in the second premixing zone 33 flows out through the diversion port 39 and is divided into a third branch and a fourth branch. The gas-water mixture in the third branch moves toward the direction of the first return water port 34, thereby forming a cycle, and the gas-water mixture in the fourth branch flows over the fairing 30 toward the downstream. Moreover, since the side wall of the fairing 30 is an inclined surface, a slope can be formed, and a part of the gas-water mixture will slide down along the slope (the reason is that the acceleration of the edge fluid forms a flow velocity difference and slides down) and counter-mixes with the gas-water mixture that rises rapidly in the fourth branch, thereby improving the mixing effect. In this way, there is reflux, mixing, and pressurized dissolved gas in the aerobic zone 3, which increases the concentration of dissolved oxygen. Under the same aeration conditions, the efficiency is improved and more energy-saving.
[0048] like Fig.10 As shown, a plurality of tooth-shaped openings 45 can be provided at the edge of the fairing 30, and the plurality of tooth-shaped openings 45 are distributed along the circumference of the fairing 30. Such a setting has two advantages: first, the mixing effect can be increased through the tooth-shaped openings, because the flow velocities through the concave area and the convex area of the tooth-shaped openings are different, which can increase the disturbance mixing effect; second, it has the function of cutting bubbles, which can increase the area of contact with water by turning large bubbles into smaller bubbles, thereby increasing dissolved oxygen. In addition, the mixing effect can be further increased by making the gas-water mixture have horizontal and downward reflux shunt momentum, and the downward shunt of the gas-water mixture will increase the mixing extension, prolong the effective contact time, and will not rise directly to the liquid surface. With such a setting, there is horizontal and downward flow in the aerobic zone 3, which increases the extension, prolongs the reaction time, and increases the concentration of dissolved oxygen. Under the same aeration conditions, the efficiency is improved and it is more energy-saving.
[0049] like Figure 7As shown, the aeration device further includes a speed-keeping component 31, which is arranged between the premixing hood 29 and the fairing 30, and one end of the speed-keeping component 31 away from the fairing 30 is connected to the release port of the premixing hood 29. For example, when the premixing hood 29 is a truncated cone structure, the speed-keeping component 31 can be a round tube. When the premixing hood 29 is a prism-shaped structure, the speed-keeping component 31 can be a square tube, so as to match the shape of the premixing hood 29. When in use, the gas-water mixture flowing out of the release port of the premixing hood 29 can enter the speed-keeping component 31, and the speed of the gas-water mixture in the speed-keeping component 31 changes little, and a high flow rate can be maintained, and then it is released from the top outlet of the speed-keeping component 31 to the second premixing zone 33. In this way, a section of the speed-keeping component 31 is added to the release port of the premixing hood 29, and this straight speed-keeping component 31 can keep the drainage force of the first premixing zone 32 relatively large. Because the speed-retaining component 31 increases the release port height of the premixing hood 29, the velocity of the gas-water mixture outside the premixing hood 29 is relatively low, and the velocity difference with the gas-water mixture in the first premixing zone 32 is relatively large, so the pressure difference is large. Compared with the case without the speed-retaining component 31, the velocity difference between the two is greater, so the drainage effect of the first premixing zone 32 is better.
[0050] like Figure 8 As shown, the aeration device further includes a baffle 44, which is arranged inside the fairing 30, and the plate surface of the baffle 44 is arranged opposite to the outlet of the speed-retaining member 31. When in use, the gas-water mixture released from the outlet at the top of the speed-retaining member 31 hits the baffle 44 and then diffuses to the surroundings. Such an arrangement can prevent the accumulation of air bubbles on the top of the fairing 30, so that the gas is smoothly released into the water, thereby improving the gas-water mixing effect.
[0051] like Fig. 9 As shown, in one embodiment, the fairing 30 may not be provided above the speed retaining member. After the water enters the sedimentation area 4, the sludge in the water will gather around the light sludge collecting bucket 13 to form a sludge filter layer, which can filter the water flowing through.
[0052] Among them, an inclined tube separation device 36 is also provided in the sedimentation area 4. The inclined tube separation device 36 is located upstream of the water outlet trough 37 and downstream of the light sludge collection bucket 13. After the water flowing through the sludge filter layer is precipitated and separated by the inclined tube separation device 36, the light sludge can fall into the light sludge collection bucket 13.
[0053] Among them, the circulating aerobic granular sludge device also includes a water outlet trough 37, which can be located at the top of the sedimentation area 4. The water body after sedimentation and separation by the inclined tube separation device 36 enters the water outlet trough 37. The water outlet trough 37 is connected to the outside of the water outlet pipe 38. The water body in the water outlet trough 37 can be discharged to the outside of the main body 1 through the water outlet pipe 38.
[0054] The circulating aerobic granular sludge device further includes an exhaust pipe 40 , one end of which is connected to the bottom of the aerobic zone 3 and the bottom of the anoxic zone 2 , and the other end of which extends to the outside of the body 1 .
[0055] like Figure 3 , Figure 4 As shown, in one embodiment, when the main body 1 is a round tank structure, the circulating aerobic granular sludge device in the present application can also be used as a sewage treatment module placed in a sewage treatment tank 41 for use. The main body 1 of the circulating aerobic granular sludge device only retains the bottom wall, and the main body 1 is no longer provided with a side wall. The sewage treatment tank area around the circulating aerobic granular sludge device is used as an aerobic zone 3. Moreover, when in use, multiple sewage treatment modules can be used in combination. For example, four sewage treatment modules can be grouped as a group and distributed in a 2-row and 2-column array in the sewage treatment tank 41. At this time, a water inlet main pipe 42 can be used, and then four water inlet branches 43 connected to the water inlet main pipe 42 can be used to supply water to the water inlet pipes of the four sewage treatment modules. For example, two groups of eight sewage treatment modules can be placed in the sewage treatment tank for use. With such a setting, a method of raising the standard can be provided for the existing tank structure without changing the original tank structure, and the sewage can be treated by the modules placed in the tank body to achieve the raising standard.
[0056] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.
Claims
1. A circulating aerobic granular sludge device, characterized in that: include: A body (1), wherein the body (1) is provided with an anoxic zone (2), an aerobic zone (3) and a sedimentation zone (4) arranged along a water flow path; The water acceleration device comprises a water inlet ejector (15) and a throat (16), wherein one end of the water inlet ejector (15) is used to communicate with an external sewage source, and the other end extends into the throat (16); the throat (16) is arranged in the anoxic zone (2), and the water entering the throat (16) is released into the anoxic zone (2) at the top end of the throat (16); A light sludge collecting hopper (13) is arranged in the sedimentation area (4), a first sludge return port is arranged on the hopper wall of the light sludge collecting hopper (13), and a sludge discharge pipe (14) extending to the outside of the main body (1) is arranged at the bottom of the light sludge collecting hopper (13); A sludge return pipe (12), one end of which is connected to the first sludge return port, and the other end of which is connected to the throat pipe (16); A sludge return controller (7), one end of which is located outside the body (1) and the other end of which is arranged in the light sludge collecting bucket (13); the end of the sludge return controller (7) located in the light sludge collecting bucket (13) is provided with a second sludge return port (8) adapted to the first sludge return port; When the first sludge return port and the second sludge return port (8) are aligned with each other, under the action of negative pressure, the sludge in the light sludge collection bucket (13) enters the throat pipe (16) through the sludge return controller (7), the second sludge return port (8), the first sludge return port and the sludge return pipe (12); when the first sludge return port and the second sludge return port (8) are staggered with each other, the sludge in the light sludge collection bucket (13) is discharged through the sludge discharge pipe (14).
2. The circulating aerobic granular sludge device according to claim 1, characterized in that: The sludge return controller (7) comprises a handle (11), a control head (9) and a connecting rod (10) for connecting the two; The handle (11) is located outside the body (1); The control head (9) is arranged in the light sludge collection bucket (13), and the outer peripheral wall of the control head (9) is in contact with the inner peripheral wall of the light sludge collection bucket (13), the interior of the control head (9) is a hollow cavity, and the top of the control head (9) is an open structure; The second sludge return port (8) is arranged on the outer peripheral wall of the control head (9), and the second sludge return port (8) is communicated with the cavity; The handle (11) is rotated so that the first sludge return port and the second sludge return port (8) are aligned with each other or staggered with each other.
3. The circulating aerobic granular sludge device according to claim 1, characterized in that: The body (1) is provided with a flow guide channel (6), which is located between the anoxic zone (2) and the aerobic zone (3) and is used to connect the anoxic zone (2) and the aerobic zone (3); The guide channel (6) comprises an ascending flow channel for causing the water body to move upward and a descending flow channel for causing the water body to move downward.
4. The circulating aerobic granular sludge device according to claim 1, characterized in that: An aerobic degassing channel (5) is provided in the body (1), and is arranged between the aerobic zone (3) and the precipitation zone (4), and an inlet of the aerobic degassing channel (5) is connected to the aerobic zone (3); The outlet of the aerobic degassing channel (5) is divided into a first branch and a second branch. A portion of the water in the aerobic degassing channel (5) enters the anoxic zone (2) through the first branch, and another portion of the water in the aerobic degassing channel (5) enters the sedimentation zone (4) through the second branch.
5. The circulating aerobic granular sludge device according to claim 1, characterized in that: The aerobic zone (3) is provided with an aeration device, and the aeration device comprises: an aerator (28), arranged in the aerobic zone (3); A premixing hood (29) is arranged at the air outlet end of the aerator (28), and the space between the premixing hood (29) and the aerator (28) forms a first premixing zone (32); a gap is left between the premixing hood (29) and the aerator (28) to form a first water return port (34), and the first water return port (34) communicates with the first premixing zone (32) and the space outside the first premixing zone (32); wherein the flow area of the release port of the premixing hood (29) is smaller than the flow area of the water inlet of the premixing hood (29), so as to increase the pressure in the first premixing zone (32) under the aeration state.
6. The circulating aerobic granular sludge device according to claim 5, characterized in that: It also includes a fairing (30) which is arranged at the release port of the premixing cover (29), the end of the fairing (30) away from the premixing cover (29) is a sealing structure, and the inner diameter of the fairing (30) gradually decreases in a direction away from the premixing cover (29); The space between the fairing (30) and the premixing cover (29) forms a second premixing zone (33); A gap is left between the fairing (30) and the premixing cover (29) to form a flow splitter (39), and the flow splitter (39) communicates with the second premixing zone (33) and a space outside the second premixing zone (33).
7. The circulating aerobic granular sludge device according to claim 6, characterized in that: A plurality of tooth-shaped openings (45) are arranged at the edge of the fairing opening of the fairing (30), and the plurality of tooth-shaped openings (45) are distributed along the circumference of the fairing (30).
8. The circulating aerobic granular sludge device according to claim 6, characterized in that: It also includes a speed-retaining component (31) disposed between the premixing cover (29) and the fairing (30), and one end of the speed-retaining component (31) away from the fairing (30) is connected to a release port of the premixing cover (29).
9. The circulating aerobic granular sludge device according to claim 1, characterized in that: A gap is left between the bottom end of the throat pipe (16) and the bottom of the body (1) to form a second water return port (35), and a portion of the water in the anoxic zone (2) enters the throat pipe (16) through the second water return port (35).
10. The circulating aerobic granular sludge device according to claim 1, characterized in that: The sedimentation area (4) is provided with an inclined tube separation device (36) and a water outlet trough (37); The inclined tube separation device (36) is arranged downstream of the light sludge collection bucket (13) and is used for sedimentation and separation of water bodies; The water outlet trough (37) is arranged downstream of the inclined tube separation device (36) and is used to collect the water after sedimentation separation.