Targeted self-circulation sludge granulation treatment device

Abstract

The utility model relates to the technical field of sewage treatment, and provides a targeted self-circulation sludge granulation treatment device which comprises a body, and an anoxic mixing zone, an anaerobic-anoxic zone, an aerobic zone and a settling zone are sequentially arranged in the body along the direction of a hydraulic path; the first partition plates are arranged in the settling zone, the space in the settling zone is divided into a plurality of independent chambers by the first partition plates, and a sludge filter bed is formed in each chamber when water flows through the settling zone; each chamber is internally provided with one sludge collecting hopper, and the upper edge of the sludge filter bed is slightly higher than the edge of the sludge collecting hopper; one end of the sludge discharge pipe is connected with the sludge collection hopper, and the other end extends out of the body. According to the device, the precipitation area is divided into a plurality of independent cavities through the first partition plates, when the sludge collecting hopper in one cavity discharges sludge, the sludge filter beds in other cavities are still kept at high positions, the treatment efficiency is ensured, the other cavities are not disturbed by discharged sludge, and the influence on the functions of the sludge filter beds is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a targeted self-circulating sludge granulation treatment device. Background Art

[0002] Existing aerobic reaction devices primarily consist of an anoxic zone, an aerobic zone, and a sedimentation zone, arranged sequentially along the sewage flow path. The raw sewage enters the anoxic zone, where it is diluted and mixed with the microorganisms within it for an anoxic reaction. The sewage then enters the aerobic zone for an aerobic reaction to further remove pollutants. The sewage then enters the sedimentation zone for sedimentation and separation. The sedimentation zone downstream contains a large amount of sludge. Existing technology, when discharging sludge, can easily destabilize the sludge filter bed above the sludge hopper. This can cause the sludge filter bed to drop in height, reducing treatment efficiency, and increase disturbances within the sedimentation zone, compromising the treatment effectiveness of the sludge filter bed. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is that the existing sewage treatment device is prone to destroying the stability of the sludge filter bed above the sludge collecting hopper when discharging sludge. On the one hand, it will cause the height of the sludge filter bed to drop, resulting in reduced treatment efficiency. On the other hand, it will increase the disturbance in the sedimentation area and affect the treatment effect of the sludge filter bed, thereby providing a targeted self-circulating sludge granulation treatment device.

[0004] In order to solve the above technical problems, the technical solutions of the present utility model are as follows:

[0005] The utility model provides a targeted self-circulating sludge granulation treatment device, comprising: a main body, wherein an anoxic mixing zone, an anaerobic zone, an aerobic zone and a sedimentation zone are sequentially arranged in the direction of the hydraulic path in the main body; a first partition plate is arranged in the sedimentation zone, and the first partition plate divides the space in the sedimentation zone into a plurality of independent chambers, and a sludge filter bed is formed in each chamber when water flows through the sedimentation zone; a sludge collecting hopper, wherein the sludge collecting hopper is arranged in each of the chambers, and the sludge filter bed is slightly higher than the bucket edge of the sludge collecting hopper; a sludge discharge pipe, one end of which is connected to the sludge collecting hopper, and the other end extends to the outside of the main body.

[0006] Furthermore, the first partition is located in the upper half of the sedimentation zone, the mud collecting hopper is located in the middle of the chamber, and the rim of the mud collecting hopper is higher than the bottom of the first partition and does not exceed the top of the first partition.

[0007] Furthermore, the targeted self-circulating sludge granulation treatment device also includes an inclined tube separation device, which is arranged in the upper half of the sedimentation zone; the bottom of the inclined tube separation device is connected to the top of the first partition.

[0008] Furthermore, the targeted self-circulating sludge granulation treatment device also includes a circulation encryption device, which is arranged in the lower half of the sedimentation area; the circulation encryption device includes an encryption pipe and a first guide cone; the encryption pipe is arranged vertically, and the diameter of the inlet end of the encryption pipe is larger than the diameter of the outlet end; the first guide cone is arranged below the encryption pipe, and a gap is left between the guide surface of the first guide cone and the outlet end of the encryption pipe.

[0009] Furthermore, the anoxic mixing zone is divided into a first mixing zone and a second mixing zone, and the outlet of the first mixing zone is connected to the inlet of the second mixing zone; a water acceleration device is provided in the first mixing zone, and the water acceleration device includes a throat and at least one first-level nozzle, and the throat cover is provided at the top of the nozzle, and the external water enters the throat after being accelerated by the nozzle, and the water is then released from the top of the throat into the first mixing zone; a sludge return hopper is provided in the second mixing zone, and the bucket edge of the sludge return hopper is provided close to the top of the second mixing zone, and the outlet of the sludge return hopper is connected to the throat.

[0010] Furthermore, the targeted self-circulating sludge granulation treatment device also includes a sludge return pipe, one end of which is connected to the sludge collecting bucket, and the other end of which is connected to the throat pipe.

[0011] Furthermore, an aeration device is provided in the aerobic zone; the aeration device includes an aerator and an accelerator; the aerator is provided at the bottom of the aerobic zone, and the aerator is used to provide gas required for aerobic reaction; the accelerator includes a premixing hood and a speed-keeping component; the premixing hood is provided 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 space inside and 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; one end of the speed-keeping component is connected to the release port of the premixing hood, and the other end extends in a direction away from the premixing hood.

[0012] Furthermore, the targeted self-circulating sludge granulation treatment device also includes a second partition; the lower half of the aerobic zone is provided with the second partition, and the second partition divides the lower half of the aerobic zone into multiple aeration zones, and the aeration device is provided in the aeration zone; the space between two adjacent aeration zones forms an internal recirculation channel, and a gap is left at the bottom of the second partition (32) to connect the aeration zone and the internal recirculation channel, and the water in the internal recirculation channel flows in the opposite direction to the water in the aeration zone; the bottom of the internal recirculation channel is provided with a second guide cone to guide the water in the internal recirculation channel to flow back into the aeration zone.

[0013] Furthermore, the lower layer of the sludge filter bed formed in the sedimentation area is a nitrification filter layer, and the upper layer is a denitrification filter layer; while the sludge filter bed filters the passing water, it uses the nitrification filter layer to remove ammonia nitrogen in the water, and uses the denitrification filter layer to remove total nitrogen and COD in the water.

[0014] Furthermore, the cross-section of the body parallel to the horizontal plane is rectangular, and the anoxic mixing zone, the anoxic anaerobic zone, the aerobic zone and the sedimentation zone are concentrically arranged from the inner circle to the outer circle.

[0015] Furthermore, the cross-sectional shape of the body parallel to the horizontal plane is rectangular; the anoxic mixing zone and the anaerobic zone are located in the left half, and the anoxic mixing zone is located in the middle, and the upper and lower sides of the anoxic mixing zone are respectively the anoxic and anaerobic zones; the aerobic zone and the sedimentation zone are located in the right half, and the aerobic zone is located in the middle, and the upper and lower sides of the aerobic zone are respectively the sedimentation zones.

[0016] Furthermore, the cross-section of the body parallel to the horizontal plane is rectangular; the anoxic mixing zone is located in the middle, and the upper and lower sides of the anoxic mixing zone are respectively anaerobic zones; the left and right sides of the anoxic mixing zone are respectively aerobic zones, and the upper and lower sides of the aerobic zone are respectively sedimentation zones.

[0017] Furthermore, the cross-sectional shape of the body parallel to the horizontal plane is rectangular; the anoxic mixing zone is located in the middle, and the upper and lower sides of the anoxic mixing zone are respectively anaerobic zones; the left and right sides of the anoxic mixing zone are respectively sedimentation zones, and the upper and lower sides of the sedimentation zone are respectively aerobic zones.

[0018] Furthermore, the targeted self-circulating sludge granulation treatment device also includes a lifting agitator, which is arranged in the first mixing zone and is used to accelerate the rise of water in the throat pipe.

[0019] The technical solution of this utility model has the following advantages:

[0020] The targeted self-circulating sludge granulation treatment device provided by the utility model divides the sedimentation area into several independent chambers through the first partition. When the sludge collecting bucket in a certain chamber is discharged, the sludge filter beds in other chambers are still kept at a high position, thereby ensuring the treatment efficiency. Moreover, the sludge discharge will not cause disturbance to other chambers, thereby avoiding affecting the function of the sludge filter beds. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 any creative work.

[0022] Figure 1 This is a schematic diagram of a targeted self-circulating sludge granulation treatment device in one embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the positional relationship between the water outlet pipe and the sludge discharge pipe in a targeted self-circulating sludge granulation treatment device in one embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the positional relationship between the first baffle and the sludge collecting hopper in a targeted self-circulating sludge granulation treatment device in one embodiment of the present invention;

[0025] Figure 4 This is a cross-sectional view of a targeted self-circulating sludge granulation treatment device in one embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the internal layout of a targeted self-circulating sludge granulation treatment device in one embodiment of the present utility model;

[0027] Figure 6 This is a schematic diagram of a first baffle in a targeted self-circulating sludge granulation treatment device in one embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of a circulation encryption device in a targeted self-circulating sludge granulation treatment device in one embodiment of the present invention;

[0029] Figure 8 This is an enlarged schematic diagram of the local structure of the aerobic zone in the targeted self-circulating sludge granulation treatment device in one embodiment of the present utility model;

[0030] Figure 9 This is a schematic diagram of an aeration device in a targeted self-circulating sludge granulation treatment device in one embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of an aeration device in a targeted self-circulating sludge granulation treatment device in another embodiment of the present invention;

[0032] Figure 11 This is a schematic diagram of an aeration device in a targeted self-circulating sludge granulation treatment device in another embodiment of the present invention;

[0033] Figure 12 This is a schematic diagram of an aeration device in a targeted self-circulating sludge granulation treatment device in another embodiment of the present invention;

[0034] Figure 13 This is a schematic diagram of the placement of aerators in a targeted self-circulating sludge granulation treatment device in one embodiment of the present utility model;

[0035] Figure 14 Schematic diagram of the internal layout of a targeted self-circulating sludge granulation treatment device in another embodiment of the present invention (top view);

[0036] Figure 15 Schematic diagram of the internal layout of a targeted self-circulating sludge granulation treatment device in another embodiment of the present invention (top view);

[0037] Figure 16 Schematic diagram of the internal layout of a targeted self-circulating sludge granulation treatment device in another embodiment of the present invention (top view);

[0038] Figure 17 This is a schematic diagram of the water distribution channel in the targeted self-circulating sludge granulation treatment device in an embodiment of the present utility model.

[0039] Figure 18 This is a schematic diagram of a sedimentation zone in a targeted self-circulating sludge granulation treatment device in one embodiment of the present invention;

[0040] Figure 19 This is a schematic diagram of a sedimentation zone in a targeted self-circulating sludge granulation treatment device in another embodiment of the present invention;

[0041] Figure 20 This is a schematic diagram of a sedimentation zone in a targeted self-circulating sludge granulation treatment device in another embodiment of the present invention;

[0042] Figure 21 This is a schematic diagram of a sedimentation zone in a targeted self-circulating sludge granulation treatment device in another embodiment of the present invention;

[0043] Figure 22 This is a schematic diagram of a lifting agitator in a targeted self-circulating sludge granulation treatment device in an embodiment of the present utility model;

[0044] Figure 23 This is a schematic diagram of a lifting agitator in a variable density self-circulating sludge granulation device in another embodiment of the present invention;

[0045] Figure 24 This is a schematic diagram of a lifting agitator in a variable density self-circulating sludge granulation device in another embodiment of the present invention;

[0046] Figure 25This is a schematic diagram of a lifting agitator in a variable density self-circulating sludge granulation device in another embodiment of the present invention;

[0047] Figure 26 This is a schematic diagram of a lifting agitator in a variable density self-circulating sludge granulation device in another embodiment of the present invention;

[0048] Figure 27 This is a schematic diagram of a lifting agitator in a variable density self-circulating sludge granulation device in another embodiment of the present invention;

[0049] Figure 28 This is a schematic diagram of a lifting agitator in a variable density self-circulating sludge granulation device in another embodiment of the present invention.

[0050] Description of reference numerals:

[0051] 1. Main body; 2. First mixing zone; 3. Second mixing zone; 4. Anoxic zone; 5. Aerobic zone; 6. Degassing channel; 7. Sedimentation zone; 8. Mud collecting hopper; 9. First baffle; 10. Inclined tube separation device; 11. Water collecting trough; 12. Outlet pipe; 13. Inlet pipe; 14. Mud discharge pipe; 15. Aeration device; 16. Spray pipe; 17. Throat pipe; 18. Sludge return hopper; 19. Sludge return pipe; 20. Circulation encryption device; 21. Encryption pipe; 22. First guide cone; 23. Anoxic mixing zone; 2 4. Second baffle; 25. Internal recirculation channel; 26. Aeration zone; 27. Speed-retaining component; 28. Premixing hood; 29. First premixing zone; 30. First water return port; 31. Aerator; 32. Second guide cone; 33. Fairing; 34. Baffle; 35. Second premixing zone; 36. Diversion port; 37. Toothed port; 38. Water distribution device; 39. Water distribution channel; 40. Water distribution channel inlet; 41. Water distribution hole; 42. Sludge return chamber; 43. Balance plate; 44. Mud discharge hopper; 45. Lifting agitator. DETAILED DESCRIPTION

[0052] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0053] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0055] 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.

[0056] like Figures 1 to 6 As shown, this embodiment provides a targeted self-circulating sludge granulation treatment device, including: a main body 1, in which an anoxic mixing zone 23, an anaerobic zone 4, an aerobic zone 5 and a sedimentation zone 7 are arranged in sequence along the direction of the hydraulic path; a first partition 9 is arranged in the sedimentation zone 7, and the first partition 9 divides the space in the sedimentation zone 7 into a plurality of independent chambers. When the water flows through the sedimentation zone 7, a sludge filter bed is formed in each chamber; a sludge collecting hopper 8, each chamber is provided with a sludge collecting hopper 8, and the upper edge of the sludge filter bed can be slightly higher than the bucket edge position of the sludge collecting hopper 8, so that a part of the sludge can enter the sludge collecting hopper 8; a sludge discharge pipe 14, one end of which is connected to the sludge collecting hopper 8, and the other end extends to the outside of the main body 1.

[0057] The targeted self-circulating sludge granulation treatment device provided in this embodiment divides the sedimentation area 7 into several independent chambers through the first partition 9. When the sludge collecting hopper 8 in a certain chamber is discharged, the sludge filter beds in other chambers still remain at a high position to ensure the treatment efficiency. Moreover, the sludge discharge will not cause disturbances to other chambers, avoiding affecting the function of the sludge filter beds.

[0058] The first partition 9 is located in the upper half of the sedimentation zone 7, and the mud collecting hopper 8 is located in the middle of the chamber. The rim of the mud collecting hopper 8 is higher than the bottom of the first partition 9 and does not exceed the top of the first partition 9. For example, three mud collecting hoppers 8 can be arranged at intervals, and the rim of the middle mud collecting hopper 8 is lower than the rims of the mud collecting hoppers 8 on both sides.

[0059] Among them, the targeted self-circulating sludge granulation treatment device also includes an inclined tube separation device 10, which is arranged in the upper half of the sedimentation area 7; the bottom of the inclined tube separation device 10 is connected to the top of the first partition 9. When the water in each chamber passes through the inclined tube separation device 10 upward, the sludge in the supernatant can be separated to ensure clear effluent.

[0060] The targeted self-circulating sludge granulation treatment device further includes a water collection tank 11 and an outlet pipe 12. The water collection tank 11 is disposed within the sedimentation zone 7 and downstream of the inclined tube separator 10, and is used to collect the supernatant in the sedimentation zone 7. The outlet pipe 12 has one end connected to the water collection tank 11 and the other end extending to the exterior of the main body 1 for discharging water.

[0061] like Figure 7 As shown, several circulating encryption devices 20 can be set in the lower half of the sedimentation zone 7, and the top of the circulating encryption device 20 is lower than the bottom of the mud collecting bucket 8; the circulating encryption device 20 includes an encryption pipe 21 and a first guide cone 22; the encryption pipe 21 is arranged vertically, and the diameter of the inlet end of the encryption pipe 21 is larger than the diameter of the outlet end; the first guide cone 22 is arranged below the encryption pipe 21, the first guide cone 22 is directly opposite the pipe mouth of the encryption pipe 21, and there is a gap between the guide surface of the first guide cone 22 and the outlet end of the encryption pipe 21. With this arrangement, during the rising process of the water on both sides of the encryption pipe 21, due to the flow velocity, the sludge inside the encryption pipe 21 flows out and is re-diverged to both sides under the guidance of the first guide cone 22, and so on and so forth, so that the sludge is continuously encrypted.

[0062] The anoxic mixing zone 23 is divided into a first mixing zone 2 and a second mixing zone 3. The outlet of the first mixing zone 2 is connected to the inlet of the second mixing zone 3. A water acceleration device is provided in the first mixing zone 2. The water acceleration device includes a throat 17 and at least one first-stage nozzle 16. The throat 17 is mounted on the top of the nozzle 16. After being accelerated by the nozzle 16, the external water enters the throat 17 and is then released from the top of the throat 17 into the first mixing zone 2. A sludge return hopper 18 is provided in the second mixing zone 3. The hopper edge of the sludge return hopper 18 is located near the top of the second mixing zone 3, and the outlet of the sludge return hopper 18 is connected to the throat 17. The water in the first mixing zone 2 can be distributed to the bottom of the second mixing zone 3 through a water distribution pipe. The external water body can be connected to the nozzle 16 through the water inlet pipe 13. The external water body is accelerated by the nozzle 16 and enters the throat 17, and is released at the top of the throat 17. The water body falls freely under the action of gravity. A return water outlet is left between the nozzle 16 and the throat 17 so that part of the water body can re-enter the throat 17, and the other part of the water body flows to the second mixing zone 3.

[0063] When the amount of water to be treated is large, multiple water acceleration devices can be set in the first mixing zone 2 at the same time, and multiple water acceleration devices can be fed with water at the same time to increase the water intake.

[0064] The sludge return hopper 18 in the second mixing zone 3 can collect anaerobic concentrated sludge and return it to the throat 17 to participate in the reaction again. A water outlet connected to the anaerobic zone 4 is provided on the side wall of the second mixing zone 3 near the top, so that the water in the second mixing zone 3 enters the anaerobic zone 4 at the top. A water outlet connected to the aerobic zone 5 is provided on the side wall of the anaerobic zone 4 near the bottom, so that the water in the anaerobic zone 4 enters the aerobic zone 5 from the bottom. A degassing channel 6 can also be provided between the aerobic zone 5 and the sedimentation zone 7. A water outlet is provided on the side wall of the aerobic zone 5 near the degassing channel 6 near the top, so that a portion of the water in the aerobic zone 5 enters the degassing channel 6 from the top. At the same time, a water outlet is provided on the side wall of the aerobic zone 5 near the anaerobic zone 4 near the top, so that another portion of the water in the aerobic zone 5 flows back to the anaerobic zone 4 from the top. A water outlet connected to the sedimentation zone 7 is provided on the side wall of the degassing channel 6 near the bottom, and the water in the anaerobic zone 4 flows into the sedimentation zone 7 from the bottom.

[0065] The targeted self-circulating sludge granulation treatment device further includes a sludge return pipe 19, one end of which is connected to the sludge collecting hopper 8 and the other end is connected to the throat pipe 17. For example, the sludge discharge pipe 14 can be connected to the sludge return pipe 19, and a control valve can be provided at the outlet of the sludge discharge pipe 14. When the control valve is closed, the sludge in the sludge collecting hopper 8 only flows back into the throat pipe 17 and is not discharged outside.

[0066] like Figure 8As shown, an aeration device 15 is provided in the aerobic zone 5; the aeration device 15 includes an aerator 31 and an accelerator; the aerator 31 is provided at the bottom of the aerobic zone 5, and is used to provide the gas required for the aerobic reaction; the accelerator includes a premixing hood 28 and a speed-retaining member 27; the premixing hood 28 is provided at the outlet end of the aerator 31, and the space between the premixing hood 28 and the aerator 31 forms a first premixing zone 29; a gap is left between the premixing hood 28 and the aerator 31 to form a first water return port 30, which connects the space inside and outside the first premixing zone 29; wherein the flow area of the release port of the premixing hood 28 is smaller than the flow area of the water inlet of the premixing hood 28, so as to increase the pressure in the first premixing zone 29 under the aeration state; one end of the speed-retaining member 27 is connected to the release port of the premixing hood 28, and the other end extends in a direction away from the premixing hood 28.

[0067] For example, the premixing hood 28 can be a truncated cone structure, with both 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 28 can also be a prism structure, with both ends open, the large end at the bottom, the small end at the top, and the small end used as a release port. Among them, the premixing hood 28 can be welded to the side wall of the aerobic zone 5 by setting a connecting rod on the side wall; it can also be installed as an integrated structure with the trachea bracket of the aerator 31 and fixed on the trachea bracket of the aerator 31. Among them, the speed-keeping component 27 can be a round tube or a square tube, which can be selected according to needs. Because the speed-keeping component 27 increases the height of the release port of the premixing hood 28, the flow rate of the gas-water mixture outside the premixing hood 28 is low, and the speed difference with the gas-water mixture in the first premixing zone 29 is large, so the pressure difference is large. Compared with the case without the speed-keeping component 27, the speed difference between the two is larger, so the drainage effect is better.

[0068] When in use, the aerator 31 releases air in the first premixing zone 29. Due to the rapid rise of the bubbles, the water outside the first premixing zone 29 will be driven into the first premixing zone 29 through the first return water port 30. In addition, the diameter of the release port just above the premixing cover 28 is reduced, which causes the pressure in the first premixing zone 29 to rise, so that the bubbles are further mixed with the water flowing back through the first return water port 30. Due to the increase in pressure, the effect of gas dissolving into the water will be better. The mixed gas-water mixture is ejected through the release port and rises to the aerobic zone 5 outside the first premixing zone 29. The speed-keeping component 27 can extend the time of high-speed movement of the water body and delay the release. With this arrangement, the aeration device 15 can increase the concentration of dissolved oxygen by backflowing, mixing and pressurizing dissolved gas when in use, which is more efficient and energy-saving under the same aeration conditions.

[0069] The targeted self-circulating sludge granulation treatment device also includes a second baffle 24. The second baffle 24 is provided in the lower half of the aerobic zone 5, dividing the lower half into multiple aeration zones 26. The aeration device 15 is located in each aeration zone 26. The space between two adjacent aeration zones 26 forms an internal recirculation channel 25. A gap is provided at the bottom of the second baffle 24, connecting the aeration zones 26 with the internal recirculation channels 25. The water in the internal recirculation channels 25 flows in opposite directions to the water in the aeration zones 26. During operation, the air lift effect of the aerator 31 can be used to accelerate water diversion, increasing the amount of refluxed water, thereby accelerating the circulation of the internal recirculation channels 25 and the aeration zones 26, and rapidly mixing the water. Moreover, under the action of aeration, the water flow in the aeration zone 26 rises rapidly, and the heavy sludge will descend from the internal recirculation channel 25, and then participate in the rising process of aeration again, making the formation efficiency of sludge particles faster. In addition, through this high-speed rise and fall, air and water scrubbing, the granular sludge is made more stable and the ball diameter ratio of the granular sludge is better.

[0070] A second guide cone 32 is provided at the bottom of the inner return channel 25 to guide the water in the inner return channel 25 back to the aeration zone 26. This arrangement can prevent mud accumulation in the inner return channel 25 and facilitate the guidance of air lift drainage.

[0071] like Figure 9 As shown, in one embodiment, the release port of the premix cover 28 may not be provided with the speed retaining member 27 .

[0072] like Figure 10 As shown, the aeration device 15 further includes a fairing 33, which is provided at the release port of the premixing hood 28. The end of the fairing 33 away from the premixing hood 28 is a sealed structure, and the inner diameter of the fairing 33 gradually decreases in the direction away from the premixing hood 28; the space between the fairing 33 and the premixing hood 28 forms a second premixing zone 35; a gap is left between the fairing 33 and the premixing hood 28 to form a diversion port 36, which connects the second premixing zone 35 with the space outside the second premixing zone 35. The fairing 33 can be welded to the side wall of the aeration zone 26 by providing a connecting rod on the side wall. For example, the fairing 33 can be a conical structure with the top of the cone on the top. For another example, the premixing hood 28 can also be a prismatic structure with the smaller top surface on the top. The shape of the fairing 33 is adapted to the shape of the premixing cover 28 . For example, when the premixing cover 28 is a truncated cone structure, the fairing 33 may be a conical structure.

[0073] For example, when the premixing hood 28 has a prism-shaped structure, the fairing 33 can have a prismatic structure. During use, the gas-water mixture in the first premixing zone 29 enters the second premixing zone 35 through the release port of the premixing hood 28. The gas-water mixture in the second premixing zone 35 flows out through the diversion port 36 and is divided into a first branch and a second branch. The gas-water mixture in the first branch moves toward the first return water port 30, thereby forming a circulation, while the gas-water mixture in the second branch flows over the fairing 33 toward the downstream. Moreover, because the sidewalls of the fairing 33 are inclined surfaces, a slope can be formed. A portion of the gas-water mixture will slide down the slope (due to the acceleration of the edge fluid causing a flow rate difference) and counter-mix with the rapidly rising gas-water mixture in the second branch, thereby improving the mixing effect. With this arrangement, there is backflow, mixing, and pressurized dissolved gas in the aeration zone 26, which increases the concentration of dissolved oxygen. Under the same aeration conditions, the efficiency is improved, and energy conservation is more enhanced.

[0074] like Figure 11 As shown, in one embodiment, the fairing 33 may also be provided at an end of the speed-retaining component 27 away from the premixing cover 28 .

[0075] like Figure 13 As shown, a plurality of tooth-shaped openings 37 can be provided at the edge of the fairing 33, and the plurality of tooth-shaped openings 37 are distributed along the circumference of the fairing 33. This arrangement has two advantages: first, the tooth-shaped openings 37 can increase the mixing effect, because the flow velocities through the concave and convex areas of the tooth-shaped openings 37 are different, which can increase the disturbance mixing effect; second, it has the function of cutting bubbles, which can turn large bubbles into smaller bubbles, increase the area of contact with water, and increase dissolved oxygen. In addition, the horizontal and downward reflux of the gas-water mixture can further increase the mixing effect, and the downward diversion of the gas-water mixture will increase the mixing range, prolong the effective contact time, and prevent it from rising directly to the liquid surface. This arrangement increases the range, prolongs the reaction time, and increases the dissolved oxygen concentration. Under the same aeration conditions, the efficiency is improved and more energy is saved.

[0076] like Figure 12 As shown, the aeration device 15 also includes a baffle 34, positioned within the fairing 33. The baffle 34 faces the outlet of the speed retaining member 27. During operation, the gas-water mixture released from the outlet at the top of the speed retaining member 27 strikes the baffle 34 and diffuses in all directions. This arrangement prevents air from accumulating at the top of the fairing 33 and causing bubbles to accumulate, allowing for smooth gas release into the water and improving the gas-water mixing effect.

[0077] The lower layer of the sludge filter bed formed in the sedimentation zone 7 is a nitrification filter layer, and the upper layer is a denitrification filter layer. While filtering the water passing through the sludge filter bed, the nitrification filter layer removes ammonia nitrogen from the water, and the denitrification filter layer removes total nitrogen and COD (Chemical Oxygen Demand) from the water.

[0078] In one embodiment, the cross-section of the body 1 parallel to the horizontal plane is rectangular, and the anoxic mixing zone 23, the anoxic anaerobic zone 4, the aerobic zone 5 and the sedimentation zone 7 are concentrically arranged from the inner circle to the outer circle.

[0079] like Figure 14 As shown, in another embodiment, the cross-sectional shape of the main body 1 parallel to the horizontal plane is rectangular; the anoxic mixing zone 23 and the anaerobic zone 4 are located in the left half, and the anoxic mixing zone 23 is located in the middle, and the upper and lower sides of the anoxic mixing zone 23 are the anaerobic zone 4 respectively; the aerobic zone 5 and the sedimentation zone 7 are located in the right half, and the aerobic zone 5 is located in the middle, and the upper and lower sides of the aerobic zone 5 are the sedimentation zone 7 respectively.

[0080] like Figure 15 As shown, in another embodiment, the cross-sectional shape of the main body 1 parallel to the horizontal plane is rectangular; the anoxic mixing zone 23 is located in the middle, and the upper and lower sides of the anoxic mixing zone 23 are respectively the anoxic and anaerobic zones 4; the left and right sides of the anoxic mixing zone 23 are respectively the aerobic zones 5, and the upper and lower sides of the aerobic zone 5 are respectively the sedimentation zones 7.

[0081] like Figure 16 As shown, in another embodiment, the cross-sectional shape of the main body 1 parallel to the horizontal plane is rectangular; the anoxic mixing zone 23 is located in the middle, and the upper and lower sides of the anoxic mixing zone 23 are respectively the anoxic and anaerobic zones 4; the left and right sides of the anoxic mixing zone 23 are respectively the sedimentation zones 7, and the upper and lower sides of the sedimentation zone 7 are respectively the aerobic zones 5.

[0082] like Figure 17As shown, in one embodiment, a water distribution device 38 is provided at the bottom of the aerobic zone 5. This water distribution device 38 comprises multiple layers of water distribution channels 39 in the vertical direction, with two adjacent layers of water distribution channels 39 interconnected. The topmost layer of water distribution channels 39 is provided with a water distribution channel inlet 40, and the bottommost layer of water distribution channels 39 is provided with a plurality of water distribution holes 41 on the channel wall. During water distribution, water in the upstream anaerobic zone 4 enters the topmost layer of water distribution channels 39 through the water distribution channel inlet 40. The water then flows to the end of the water distribution channels 39 in that layer and then into the water distribution channels 39 in the next layer. The water then flows to the end of the water distribution channels 39 in that layer and then into the water distribution channels 39 in the next layer, until it enters the bottommost layer of water distribution channels 39, where it is evenly released through the water distribution holes 41. This arrangement allows water to be evenly distributed at the bottom of the aerobic zone 5. Especially for scenarios where the aerobic zone 5 is large, this water distribution method can achieve even water distribution across the entire area, ensuring that the entire aerobic zone 5 is fully utilized and improving treatment effects.

[0083] The water distribution device 38 can be used in combination with the aeration device 15, with the water distribution device 38 at the bottom and the aeration device 15 at the top, which can achieve uniform water distribution in the aerobic zone 5 while improving the aeration effect and enhancing the effect of the aerobic reaction.

[0084] Among them, when distributing water, the water distribution device 38 is not limited to being used in the aerobic zone 5, but can also be used in other functional areas that require uniform water distribution, for example, it can also be used in the anoxic mixing zone, the anoxic anaerobic zone 4, and the sedimentation zone 7 and other functional areas.

[0085] like Figure 18 As shown, in one embodiment, a sludge return chamber 42 is further provided within the sedimentation zone 7; the sludge return chamber 42 is located on one side of the sedimentation zone 7, and the sludge collecting hopper 8 is located on the other side of the sedimentation zone 7. The area between the two constitutes the sludge filter bed. Furthermore, an inclined tube separation device 10 is provided in the middle of the sedimentation zone 7. Unlike the inclined tube separation device 10 near the top, the tube bundles within this inclined tube separation device are all inclined toward the sludge return chamber 42, while the inclined tubes of the inclined tube separation device 10 at the top are all vertically arranged. This arrangement provides a certain guiding effect for the lower inclined tube separation device 10, directing the sludge toward the sludge return chamber 42. A balancing plate 43 can be provided above the sludge return chamber 42. The balancing plate 43 is vertically arranged, with the bottom of the balancing plate 43 lower than the upper edge of the sludge return chamber 42 and the top of the balancing plate 43 flush with the rim of the sludge collecting hopper 8. This arrangement allows the sludge filter bed to be flush with the edge of the distal mud collecting hopper 8, ensuring that the sludge filter bed is at the same height across the entire surface, while also preventing the heavier sludge from flowing back into the lower portion.

[0086] like Figure 19As shown, in one embodiment, a portion of the tube bundles in the lower inclined tube separation device 10 can be tilted toward the sludge return chamber 42, while another portion can be tilted toward the sludge collection hopper 8. Furthermore, the bottom of the sludge collection hopper 8 can also be connected to the sludge return pipe 19 via a pipeline. With this arrangement, smaller sludge in the sludge filter bed enters the sludge return chamber 42 from the left side for recirculation, while the right side serves as a space for the inclined tube separation device 10 to separate finer sludge.

[0087] like Figure 20 As shown, in one embodiment, the inclined tube separation device 10 is connected to the sludge return pipe 19 through a pipeline at the middle position where the two parts of the tube bundle have different inclination directions. This arrangement allows a portion of the sludge in the area where the sludge filter bed is located to flow back to the upstream first mixing zone 2.

[0088] like Figure 21 As shown, in one embodiment, the inclined tube separation device 10 is provided with a sludge discharge hopper 44 at the middle position where the two tube bundles have different inclination directions. The bottom of the sludge discharge hopper 44 is connected to a pipeline, and the pipeline extends to the outside of the body 1 or can be connected to the sludge discharge pipe 14. This arrangement ensures that the sludge in the middle position can also be discharged normally when the water volume is large and the area of the entire structure is too large. The sludge return pipe 19 can also be connected to the sludge discharge hopper 44 through a pipeline at the position where it passes through the sludge discharge hopper 44. This arrangement allows the sludge in the sludge discharge hopper to flow back to the first mixing zone 2 upstream.

[0089] like Figure 22 As shown, in one embodiment, the targeted self-circulating sludge granulation treatment device also includes a lifting agitator 45, the base of the lifting agitator 45 can be installed on the top of the main body 1, and the connecting rod and the spiral blades of the lifting agitator 45 are extended into the throat 17. When in use, the lifting agitator 45 can promote the water body in the throat 17 to rise. For example, the lifting agitator 45 can adopt frequency conversion control to make the spiral blade speed adjustable. At this time, the flow rate of the rising water body can also be adjusted, and then the amount of water reflux will also change with the change of speed. Among them, the lifting agitator 45 can be used alone or in conjunction with injection and air lift.

[0090] like Figure 23 As shown, in one embodiment, the first mixing zone 2 uses pressured water inlet at the bottom, which is then accelerated by jets. Multiple accelerators are installed in the ascending section for drainage. In addition to nozzle acceleration, a lift agitator 45 is also installed at the top to assist in upward flow. The speed of the spiral blades can vary the drainage force and flow rate. The throat pipe 17 has two or more drainage layers, allowing the recirculation and mixing of water from the anoxic, aerobic, and sedimentation zones.

[0091] like Figure 24As shown, in one embodiment, gravity feed is used at the bottom of the first mixing zone 2. Due to the increased velocity of the upward flow from the lifting agitator 45, any required backflow during the ascent can be accelerated by varying the diameter. All upward flow is channeled by the spiral blades, which can be configured to have two or more layers. The speed of the spiral blades can be adjusted to vary the force and flow rate of the drainage. The throat 17 has two or more layers of drainage, allowing for the mixing of water required for backflow from the anoxic, aerobic, and sedimentation zones.

[0092] like Figure 25 As shown, in one embodiment, the bottom of the first mixing zone 2 is gravity fed. The water first enters an annular water distribution bin with an annular gap at the bottom for uniform water distribution. After distribution, the water enters the central rising zone and is lifted upstream by the lifting agitator 45. The speed of the spiral blades can change the drainage force and flow rate. During the lifting process, points where reflux is required are reduced in diameter and accelerated, and then connected to the reflux pipe. The throat pipe 17 needs to have two or more layers of drainage, and the diameter is reduced to allow reflux mixing between the anoxic zone, aerobic zone, and sedimentation zone.

[0093] like Figure 26 As shown, in one embodiment, water is fed by gravity from the bottom of the first mixing zone 2. The water first enters an annular water distribution bin with an annular gap at the bottom for uniform water distribution. After distribution, the water enters the central riser zone and is lifted by the lift agitator 45. The speed of the spiral impeller can change the force and flow rate of the drainage. During the lifting process, points where reflux is required are reduced in diameter and accelerated, and then connected to the return pipe. The impeller is mainly arranged in the upper area.

[0094] like Figure 27 As shown, in one embodiment, the bottom of the first mixing zone 2 adopts gravity water inflow, and the spiral blades are set with unequal diameters.

[0095] like Figure 28 As shown, in one embodiment, water enters the bottom of the first mixing zone 2 by gravity. After bouncing off the bottom plate, it rises due to the lifting action of the lifting agitator 45. After distribution, the water enters the central rising zone and is lifted upstream by the lifting agitator 45. The speed of the spiral blades can change the drainage force and flow rate. The water is then connected to the return pipe. The spiral blades are arranged in independent buckets, which are connected to the return pipe to return water from the anoxic zone, aerobic zone, sedimentation zone, and other areas that need to flow back to the central mixing zone.

[0096] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A targeted self-circulating sludge granulation treatment device, characterized in that: include: A body (1), wherein an anoxic mixing zone (23), an anaerobic zone (4), an aerobic zone (5) and a sedimentation zone (7) are sequentially arranged in the body (1) along the direction of the hydraulic path; a first partition (9) disposed in the sedimentation zone (7), wherein the first partition (9) divides the space in the sedimentation zone (7) into a plurality of independent chambers, and a sludge filter bed is formed in each chamber when water flows through the sedimentation zone (7); A mud collecting hopper (8) is provided in each of the chambers, and the upper edge of the sludge filter bed is slightly higher than the edge of the mud collecting hopper (8).

2. The targeted self-circulating sludge granulation treatment device according to claim 1, characterized in that: The first baffle (9) is located in the upper half of the sedimentation zone (7), the mud collecting hopper (8) is located in the middle area of the chamber, and the rim of the mud collecting hopper (8) is higher than the bottom of the first baffle (9) and does not exceed the top of the first baffle (9).

3. The targeted self-circulating sludge granulation treatment device according to claim 1, characterized in that: It also includes an inclined tube separation device (10) arranged in the upper half of the sedimentation zone (7); The bottom of the inclined tube separation device (10) is connected to the top of the first partition plate (9).

4. The targeted self-circulating sludge granulation treatment device according to claim 1, characterized in that: It also includes a cyclic encryption device (20) arranged in the lower half of the precipitation zone (7); The circulating encryption device (20) comprises an encryption tube (21) and a first guide cone (22); The densification tube (21) is arranged vertically, and the diameter of the inlet end of the densification tube (21) is larger than the diameter of the outlet end; The first guide cone (22) is arranged below the densification tube (21), and a gap is left between the guide surface of the first guide cone (22) and the outlet end of the densification tube (21).

5. The targeted self-circulating sludge granulation treatment device according to claim 1, characterized in that: The anoxic mixing zone (23) is divided into a first mixing zone (2) and a second mixing zone (3), and the outlet of the first mixing zone (2) is connected to the inlet of the second mixing zone (3); A water acceleration device is provided in the first mixing zone (2), the water acceleration device comprising a throat (17) and at least one first-stage nozzle (16), the throat (17) being covered at the top of the nozzle (16), the external water being accelerated by the nozzle (16) and then entering the throat (17), and then being released from the top of the throat (17) into the first mixing zone (2); A sludge return hopper (18) is provided in the second mixing zone (3), the hopper edge of the sludge return hopper (18) is provided close to the top of the second mixing zone (3), and the outlet of the sludge return hopper (18) is connected to the throat pipe (17).

6. The targeted self-circulating sludge granulation treatment device according to claim 5, characterized in that: It also includes a sludge return pipe (19), one end of which is connected to the sludge collecting bucket (8) and the other end of which is connected to the throat pipe (17).

7. The targeted self-circulating sludge granulation treatment device according to claim 1, characterized in that: An aeration device (15) is provided in the aerobic zone (5); The aeration device (15) includes an aerator (31) and an accelerator; The aerator (31) is arranged at the bottom of the aerobic zone (5), and the aerator (31) is used to provide gas required for aerobic reaction; The accelerating part includes a premixing cover (28) and a speed-maintaining part (27); The premixing cover (28) is arranged at the air outlet end of the aerator (31), and the space between the premixing cover (28) and the aerator (31) forms a first premixing zone (29); a gap is left between the premixing cover (28) and the aerator (31) to form a first water return port (30), and the first water return port (30) communicates the space inside and outside the first premixing zone (29); wherein the flow area of the release port of the premixing cover (28) is smaller than the flow area of the water inlet of the premixing cover (28), so as to increase the pressure in the first premixing zone (29) under the aeration state; One end of the speed-retaining member (27) is connected to the release port of the premixing cover (28), and the other end extends in a direction away from the premixing cover (28).

8. The targeted self-circulating sludge granulation treatment device according to claim 7, characterized in that: Also included is a second partition (24); The lower half of the aerobic zone (5) is provided with the second partition (24), and the second partition (24) divides the lower half of the aerobic zone (5) into a plurality of aeration zones (26), and the aeration device (15) is provided in the aeration zone (26); The space between two adjacent aeration zones (26) forms an internal reflux channel (25), and a gap is left at the bottom of the second partition plate (24) to connect the aeration zones (26) and the internal reflux channel (25). The water in the internal reflux channel (25) flows in the opposite direction to the water in the aeration zones (26); A second guide cone (32) is provided at the bottom of the inner recirculation channel (25) to guide the water in the inner recirculation channel (25) to flow back into the aeration zone (26).

9. The targeted self-circulating sludge granulation treatment device according to claim 1, characterized in that: The lower layer of the sludge filter bed formed in the sedimentation zone (7) is a nitrification filter layer, and the upper layer is a denitrification filter layer; The sludge filter bed filters the water passing through it, while using the nitrification filter layer to remove ammonia nitrogen in the water, and using the denitrification filter layer to remove total nitrogen and COD in the water.

10. The targeted self-circulating sludge granulation treatment device according to claim 1, characterized in that: The cross-section of the body (1) parallel to the horizontal plane is rectangular, and the anoxic mixing zone (23), the anoxic anaerobic zone (4), the aerobic zone (5) and the sedimentation zone (7) are concentrically arranged from the inner circle to the outer circle.

11. The targeted self-circulating sludge granulation treatment device according to claim 1, characterized in that: The cross-sectional shape of the body (1) along a plane parallel to a horizontal plane is rectangular; The anoxic mixing zone (23) and the anaerobic anoxic zone (4) are located in the left half, and the anoxic mixing zone (23) is located in the middle. The upper and lower sides of the anoxic mixing zone (23) are the anaerobic anoxic zones (4). The aerobic zone (5) and the sedimentation zone (7) are located in the right half, and the aerobic zone (5) is located in the middle. The upper and lower sides of the aerobic zone (5) are the sedimentation zones (7) respectively.

12. The targeted self-circulating sludge granulation treatment device according to claim 1, characterized in that: The cross-sectional shape of the body (1) along a plane parallel to a horizontal plane is rectangular; The anoxic mixing zone (23) is located in the middle, and the upper and lower sides of the anoxic mixing zone (23) are respectively the anoxic and anaerobic zones (4); The left and right sides of the anoxic mixing zone (23) are respectively aerobic zones (5), and the upper and lower sides of the aerobic zone (5) are respectively sedimentation zones (7).

13. The targeted self-circulating sludge granulation treatment device according to claim 1, characterized in that: The cross-sectional shape of the body (1) along a plane parallel to a horizontal plane is rectangular; The anoxic mixing zone (23) is located in the middle, and the upper and lower sides of the anoxic mixing zone (23) are respectively the anoxic and anaerobic zones (4); The left and right sides of the anoxic mixing zone (23) are respectively the sedimentation zones (7), and the upper and lower sides of the sedimentation zone (7) are respectively the aerobic zones (5).

14. The targeted self-circulating sludge granulation treatment device according to claim 5, characterized in that: It also includes a lifting agitator (45) arranged in the first mixing zone (2) for accelerating the rise of the water in the throat (17).

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