A flotation tank device and sewage treatment system

Abstract

This utility model discloses a dissolved air flotation (DAF) tank device and a wastewater treatment system, mainly used for short-process, overflow, and slightly polluted wastewater treatment. The DAF tank device includes: an aeration pipe; a rotating assembly, installed inside the DAF tank device, which is rotatable; a sludge scraping assembly, including a scraper and a collector, with the scraper located near the water surface and the rotating assembly driving the scraper to rotate and remove pollutants from the water surface; and a sludge removal assembly, located at the bottom of the DAF tank device, including a scraper, which is driven by the rotating assembly to rotate and remove pollutants from the bottom of the water. The wastewater treatment system includes a DAF tank device and a packing tank device that can be used independently or in series, enabling flexible, efficient, and low-cost wastewater treatment.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to an air flotation tank device and a sewage treatment system. Background Art

[0002] The treatment technology of micro-polluted water and overflow pollution has been an important research direction in the field of environmental engineering in recent years.

[0003] However, in scenarios such as emergency sewage treatment of overflow pollution, it is often temporary and uncertain, and efficient and convenient treatment equipment is needed to meet the needs of this scenario. At the same time, in remote or underdeveloped areas, such as fish pond tailwater, closed water circulation purification and other scenarios, when treating overflow and slightly polluted water bodies, sewage treatment equipment with high stability, low operation and maintenance difficulty, simple operation and low cost is required.

[0004] Prior art CN107572662A discloses a biological treatment device for slightly polluted water sources, including a reactor body, wherein the reactor body includes a pre-treatment unit and a post-treatment unit, wherein a hanging filler layer, a modified zeolite layer, a pebble layer and a water-permeable support plate are arranged inside the pre-treatment unit; a pebble layer, a modified zeolite layer, a quartz sand layer and a water-permeable support plate are arranged inside the post-treatment unit; a bottom water outlet chamber is arranged at the bottom of both the pre-treatment unit and the post-treatment unit, an overflow weir and a water outlet pipe are arranged on the right side of the post-treatment unit, and a backwash pipe is also arranged inside the reactor.

[0005] The prior art CN102515419A discloses a short-process micro-polluted raw water treatment combined system integrating adsorption-biooxidation-membrane separation technology, including a raw water tank, a biological contact oxidation zone, a transition zone and a membrane reaction zone. The raw water tank is connected to the water inlet on the top side of the biological contact oxidation zone through a water suction diaphragm pump and a pipeline, and the air pump is connected to the air inlet on the top side of the biological contact oxidation zone through a pneumatic butterfly valve and a pipeline. The air inlet is connected to the air inlet pipe, and the air inlet pipe is inserted into the bottom of the biological contact oxidation zone; PAC particles are provided in the biological contact oxidation zone and the transition zone, a membrane pool is provided on one side of the transition zone, and a hollow fiber membrane is provided in the membrane pool.

[0006] The above technical solutions are not suitable for fast, efficient, flexible, convenient and low-cost sewage treatment in short-process, overflow and slightly polluted sewage treatment scenarios.

[0007] In view of the above technical problems, the present utility model is specially introduced. Summary of the invention

[0008] The main purpose of the utility model is to provide a flotation tank device and a sewage treatment system, which are used to perform fast, efficient, flexible, convenient and low-cost sewage treatment in short-process, overflow and slightly polluted sewage treatment scenarios.

[0009] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a flotation tank device is proposed, including a flotation tank aeration pipe, through which water in the flotation tank device is aerated, and also including the following components:

[0010] A rotating assembly is provided in the air flotation tank device and is rotatable;

[0011] The scraping assembly includes a scraping member and a scraping collecting member. The scraping member is close to the liquid surface of the water body. The rotating assembly drives the scraping member to rotate and scrape off pollutants on the liquid surface of the water body. The scraping collecting member is arranged on the rotating path of the scraping member, and the scraping collecting member collects pollutants contained in the scraping member.

[0012] The mud discharge assembly is arranged at the bottom of the flotation tank device. The mud discharge assembly includes a mud scraper. The rotating assembly drives the mud scraper to rotate and scrape off pollutants at the bottom of the water body.

[0013] Furthermore, the air flotation tank device is divided into a water inlet box, an air flotation box and a water outlet box which are connected in sequence, and the rotating assembly, the scraper and the mud scraper are all located in the air flotation box.

[0014] Furthermore, the scraper comprises a first bending portion, which is located 2 to 3 cm below the water surface in the air flotation box, and contains pollutants on the water surface.

[0015] Furthermore, a first inclined surface portion is provided on one side of the slag collecting member, and the first bent portion moves relative to the first inclined surface portion so that the first bent portion is elastically deformed.

[0016] Furthermore, a second inclined surface is provided on the other side of the slag collecting member, and the slag scraping assembly further includes a slag discharge bucket, and the first inclined surface and the second inclined surface are connected to the slag discharge bucket.

[0017] Furthermore, the scraper also includes a second bending portion, which is connected to the end of the first bending portion, has a bending radius smaller than the first bending portion, and is in contact with the first inclined portion and the second inclined portion in sequence.

[0018] Furthermore, the scraping assembly also includes a slag discharge pipe, which is located at the bottom of the slag discharge bucket, and the slag discharge bucket is connected to the outside of the flotation tank device through the slag discharge pipe.

[0019] Furthermore, the rotating assembly includes a driver, an upper transmission shaft and a lower transmission shaft. The driver drives the upper transmission shaft and the lower transmission shaft to rotate. The scraper is connected to the circumference of the upper transmission shaft through a scraper bracket, and the scraper is connected to the circumference of the lower transmission shaft through a scraper bracket.

[0020] Furthermore, a coaxial transmission is arranged between the upper transmission shaft and the lower transmission shaft, the driver is arranged above the upper transmission shaft, and the scraper and the mud scraper rotate coaxially.

[0021] Furthermore, a hydraulic inclined plate is arranged in the water outlet box, the hydraulic inclined plate includes a plurality of plate assemblies, the plate assemblies have a plurality of water passages, the plurality of plate assemblies are movably connected in sequence, the water passages of the plurality of plate assemblies are connected in sequence, and the buoyancy of the water in the water outlet box causes the plurality of plate assemblies to tilt from a vertical state.

[0022] Furthermore, a foam elimination component is arranged in the air flotation box, and the foam elimination component is arranged above the liquid surface of the water body.

[0023] Furthermore, the foam elimination component includes a spray pipe, which is located above the scraping component. The spray pipe has a multi-circle annular structure, and each circle of the spray pipe has a plurality of injection ports.

[0024] Furthermore, the flotation tank device includes a sewage inlet and a flotation tank outlet, the flotation tank aeration pipe is located 0.3 to 0.4 m below the sewage inlet, and the flotation tank aeration pipe is connected to the nano aerator.

[0025] Furthermore, the top of the water inlet tank is connected to the top of the flotation tank, the bottom of the flotation tank is connected to the bottom of the water outlet tank, the flotation tank aeration pipe and sewage inlet are both located below the water inlet tank, and the flotation tank outlet is located above the water outlet tank.

[0026] Furthermore, a water inlet observation port is provided above the water inlet box, and a scraping observation port is provided above the air flotation box. Both the water inlet observation port and the scraping observation port are located at the top of the air flotation tank device.

[0027] Furthermore, the mud discharge assembly also includes a mud discharge pipe, the bottom of the flotation box is set as a spherical surface, the inner bottom surface of the flotation box is connected to the outside of the flotation tank device through the mud discharge pipe, and a mud discharge pipe valve is provided on the mud discharge pipe.

[0028] The application of the technical solution of the air flotation tank device of the utility model achieves at least the following beneficial effects:

[0029] 1. The flotation tank device is designed with an internal rotating component that can drive the scraper and the scraper to rotate respectively, so that the solid impurities floating on the top of the liquid surface and the bottom of the water body formed by the fusion of micro-nano flotation and influent water can be quickly removed and discharged. If there are many bubbles, they can be quickly eliminated by the foam elimination component, so that the flotation tank device can quickly and efficiently treat the water body in the flotation box that forms a three-phase separation state of solid, liquid and gas, and has a large processing load and high processing efficiency.

[0030] 2. The flotation tank device designs the specific structures of the slag collecting part and the slag scraping part. The first bending part is elastically deformed by the relative movement of the first bending part and the first inclined portion, so that the pollutants scraped off during the rotation of the first bending part are quickly collected in the slag collecting part, and the sealing between the slag scraping part and the slag collecting part is ensured by designing the second bending part.

[0031] 3. The flotation tank device is designed with a rotating assembly including an upper transmission shaft, a lower transmission shaft and a coaxial transmission, so that the scraper assembly at the water surface and the mud scraper assembly at the bottom of the water body can achieve coaxial operation, and can also adjust their respective rotation speeds to adapt to different treatment efficiencies. The flotation tank device has a simple structure and is easy to operate and maintain.

[0032] 4. The flotation tank device is designed with a hydraulic inclined plate in the outlet tank. When the outlet water passes through the outlet tank, multiple plate components of the hydraulic inclined plate are tilted by buoyancy to form multiple sections of inclined plate space to further intercept pollutants.

[0033] In order to achieve the above-mentioned purpose, according to another aspect of the utility model, a sewage treatment system is proposed, including a flotation tank device and a plurality of filler tank devices, wherein the filler tank device is provided with biological fillers in a fixed or fluidized state, and the flotation tank device is connected to one or more filler tank devices.

[0034] Furthermore, an aeration assembly is provided in the filler pool device, and the aeration assembly includes an aeration pipeline and a plurality of aeration heads. The aeration pipeline is configured as a disc-shaped pipeline network structure along the horizontal direction, and the plurality of aeration heads are distributed on the aeration pipeline and arranged in an array.

[0035] Furthermore, a filler bracket and multiple biological filler modules are also provided in the filler pool device. The filler bracket is arranged above the aeration pipeline. Multiple biological filler modules are placed on the filler bracket and laid in the horizontal direction. The aeration head is arranged to be tubular in the vertical direction. The multiple aeration heads are respectively inserted into multiple biological filler modules.

[0036] Furthermore, the filling pool device includes a filling pool water inlet and a filling pool water outlet. The filling pool water inlet is located at the bottom of the filling pool device, and the filling pool water outlet is located at the top of the filling pool device. A filling pool water outlet trough is also arranged above the multiple biological filling modules in the filling pool device.

[0037] The application of the sewage treatment system technical solution of the utility model achieves at least the following beneficial effects:

[0038] 1. This sewage treatment system is combined with a flotation tank device and a plurality of filler tank devices connected in parallel. It can be operated in two groups or individually, and the order can be changed. Different numbers of filler tank devices can be selected according to the situation, making the assembly of the entire sewage treatment system flexible, efficient and convenient, and the manufacturing and operation and maintenance costs are low.

[0039] 2. The filler tank device of the sewage treatment system is designed to cooperate with the aeration head of the aeration component and the biological filler module. The aeration generated by the aeration head enters the biological filler module and the gas flow is organized through structural design, so that the aeration effect of the filler tank device is higher. The aeration component can be selected according to the actual situation without aeration to perform anoxic or anaerobic reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0041] Figure 1 A schematic diagram of an air flotation tank device according to an embodiment is shown;

[0042] Figure 2 A schematic diagram of a scraper assembly according to an embodiment is shown;

[0043] Figure 3 A schematic diagram of a sewage treatment system according to an embodiment is shown;

[0044] Figure 4 A cross-sectional schematic diagram of a filling pool device according to an embodiment is shown.

[0045] The above drawings include the following reference numerals:

[0046] 1. Air flotation tank device; 11. Sewage inlet; 12. Air flotation tank aeration pipe; 13. Air flotation tank outlet; 14. Water inlet tank; 15. Air flotation tank; 16. Water outlet tank; 17. Water inlet observation port; 18. Slag scraping observation port; 19. Connecting pipeline;

[0047] 2. Nano aerator; 3. Foam elimination assembly; 31. Spray pipe; 4. Slag scraping assembly; 41. Slag scraping member; 42. Slag collecting member; 43. Slag discharge bucket; 44. Slag discharge pipe; 45. First bending portion; 46. Second bending portion; 47. First inclined portion; 48. Second inclined portion;

[0048] 5. Mud discharge assembly; 51. Mud scraper; 52. Mud discharge pipe; 53. Mud discharge pipe valve; 6. Rotating assembly; 61. Driver; 62. Upper transmission shaft; 63. Coaxial transmission; 64. Lower transmission shaft; 65. Transmission shaft fixing seat; 7. Hydraulic inclined plate;

[0049] 8. Filling pool device; 81. Filling pool water inlet; 82. Filling pool water outlet; 83. Biological filler module; 84. Filler bracket; 85. Filling pool water outlet valve; 86. Filling pool water inlet valve; 87. Filling pool water outlet trough; 9. Aeration component; 91. Aeration pipeline; 92. Aeration head. DETAILED DESCRIPTION

[0050] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0051] The present invention is further described in detail below in conjunction with specific embodiments, and these embodiments cannot be understood as limiting the scope of protection claimed by the present invention. The term "including" indicates the existence of a feature when used, but does not exclude the existence or addition of one or more other features; the orientation or position relationship indicated by the terms "lateral", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply 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 a limitation on the present invention; in addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0052] In the description, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected, or 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 utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0053] Embodiment 1:

[0054] This embodiment proposes a flotation tank device, which is mainly used for short-flow, overflow, and micro-polluted sewage treatment. As shown in the figure, it includes a flotation tank aeration pipe 12, a sewage inlet 11, and a flotation tank outlet 13. The flotation tank aeration pipe 12 is connected to the nano aerator 2, and the nano aerator 2 aerates the water in the flotation tank device through the flotation tank aeration pipe 12.

[0055] The flotation tank device 1 is divided into a water inlet box 14, a flotation box 15 and a water outlet box 16 which are connected in sequence. Preferably, the upper part of the water inlet box 14 is connected to the upper part of the flotation box 15, the lower part of the flotation box 15 is connected to the lower part of the water outlet box 16, the aeration pipe 12 of the flotation tank and the sewage inlet 11 are both located below the water inlet box 14, and the water outlet 13 of the flotation tank is located above the water outlet box 16.

[0056] The water body enters the water inlet box 14 by lifting or gravity flow. Preferably, the aeration pipe 12 of the flotation tank is located 0.3m to 0.4m below the sewage inlet 11. In this way, the micro-nano aeration and the incoming sewage in the water inlet box 14 are fully integrated and then enter the flotation box 15. The water body entering the flotation box 15 forms a state of solid-liquid-gas separation, in which the bubbles formed by the gas reach the surface of the water body upward, and some solid pollutants such as impurities, colloids, etc. float on the surface of the water body or settle at the bottom of the water body.

[0057] The following components are also provided in the flotation tank device 1: a rotating assembly 6, which is arranged in the flotation tank device 1 and can rotate. A scraping assembly 4, which includes a scraping member 41 and a collecting member 42. The scraping member 41 is close to the surface of the water body, and the rotating assembly 6 drives the scraping member 41 to rotate and scrape off pollutants on the surface of the water body. The collecting member 42 is arranged on the rotation path of the scraping member 41, and the collecting member 42 collects pollutants contained in the scraping member 41. A mud discharge assembly 5, which is arranged at the bottom of the flotation tank device 1, and includes a scraper 51. The rotating assembly 6 drives the scraper 51 to rotate and scrape off pollutants at the bottom of the water body.

[0058] A foam elimination assembly 3 is also provided in the air flotation box 15, and the foam elimination assembly 3 is arranged above the water surface. Preferably, the foam elimination assembly 3 includes a spray pipe 31, and the spray pipe 31 is located above the scraper assembly 4, and the spray pipe 31 has a multi-circle annular structure, and each circle of the spray pipe 31 has a plurality of injection ports.

[0059] Preferably, the spray pipe 31 is connected to the water outlet box 16 or the water outlet 13 of the flotation tank, and some of the water is drawn out and sprayed onto the water surface in the flotation box through the spray pipe 31 to eliminate bubbles on the water surface. The specific number of turns and spray angle of the spray pipe are determined according to actual conditions.

[0060] Specifically, the rotating assembly 6, the scraper 41 and the scraper 51 are all located in the flotation box 15. The rotating assembly 6 can drive the scraper 41 and the scraper 51 to rotate respectively, so that the solid pollutant impurities floating on the top of the liquid surface and the bottom of the water body formed after the fusion of micro-nano flotation and the incoming water can be quickly removed. If there are many bubbles, they can be quickly eliminated by the foam elimination component, so that the flotation tank device can quickly and efficiently treat the water body in the flotation box that forms a three-phase separation state of solid, liquid and gas, with a large processing load and high processing efficiency.

[0061] Combination Figure 2 As shown in the cross-sectional view of FIG. 1 , the scraper 41 includes a first bent portion 45, which is located slightly below the water surface in the air flotation box 15. The first bent portion 45 is used to contain pollutants on the water surface. During the rotation of the scraper 41, solid impurities on the surface of the water are scraped off and collected in the first bent portion 45.

[0062] Preferably, the scraper 41 is made of elastic material such as rubber and is formed into a scraper plate shape, and the scraper 41 is arranged along the diameter or radius of the air flotation box 15. A first bending portion 45 is arranged at the bottom of the scraper plate, and the bottom elevation of the first bending portion 45 is 2 to 3 cm below the water surface, so as to effectively scrape off the solid impurities at the liquid surface.

[0063] Preferably, the slag collecting member 42 is arranged along the radius of the air flotation box 15, and the position of the slag collecting member 42 is fixed. A first inclined portion 47 is arranged on one side of the slag collecting member 42, and the height of the first inclined portion 47 gradually increases in the direction in which the scraper 41 moves past the slag collecting member 42. And the elevation of the first inclined portion 47 is substantially the same as the bottom of the first bent portion 45. The first bent portion 45 moves relative to the first inclined portion 47 so that the first bent portion 45 is elastically deformed, thereby discharging the solid pollutants stored in the first bent portion 45 into the slag collecting member 42.

[0064] Further preferably, a second inclined surface 48 is provided on the other side of the slag collecting member 42, and the second inclined surface 48 may be the same or similar in shape to the first inclined surface 47. The scraping assembly 4 further includes a slag discharge bucket 43 and a slag discharge pipe 44, and the first inclined surface 47 and the second inclined surface 48 are connected to the slag discharge bucket 43. The slag discharge pipe 44 is located at the bottom of the slag discharge bucket 43, and the slag discharge bucket 43 is connected to the outside of the flotation tank device 1 through the slag discharge pipe 44. The scraping member 41 can smoothly pass through the slag collecting member 42 and collect the collected solid impurities into the slag discharge bucket 43, and then discharge the device through the slag discharge pipe 44.

[0065] Preferably, the scraper 41 further includes a second bent portion 46, which is connected to the end of the first bent portion 45, has a smaller bending radius than the first bent portion 45, and has a bending direction opposite to that of the first bent portion 45. The second bent portion 46 sequentially contacts the first inclined portion 47 and the second inclined portion 48. The second bent portion is used to ensure sealing between the scraper and the scraper.

[0066] In some other embodiments, those skilled in the art may design the shapes and structures of the scraper 41 and the scraper 42 in other forms.

[0067] like Figure 1 As shown, the rotating assembly 6 includes a driver 61, an upper transmission shaft 62 and a lower transmission shaft 64, and the upper transmission shaft 62 and the lower transmission shaft 64 are connected by a coupling. The driver 61 is located at the top of the flotation tank device 1. The driver 61 drives the upper transmission shaft 62 and the lower transmission shaft 64 to rotate, and the scraper 41 is connected to the circumference of the upper transmission shaft 62 through a scraper bracket, and the scraper 51 is connected to the circumference of the lower transmission shaft 64 through a scraper bracket. In this way, the rotation of the upper transmission shaft 62 drives the scraper 41 to rotate, and the rotation of the lower transmission shaft 64 drives the scraper 51 to rotate.

[0068] Preferably, a coaxial transmission 63 is provided between the upper transmission shaft 62 and the lower transmission shaft 64, the driver 61 is provided above the upper transmission shaft 62, and the scraper 41 and the scraper 51 rotate coaxially. The scraper assembly at the surface of the water body and the scraper assembly at the bottom of the water body can be coaxially operated, and their respective rotation speeds can be adjusted to adapt to different treatment efficiencies. The flotation tank device has a simple structure and is easy to operate and maintain.

[0069] Preferably, a hydraulic inclined plate 7 is provided in the water outlet box 16, and the hydraulic inclined plate 7 includes a plurality of plate assemblies, and the plate assemblies have a plurality of water passages, and the plurality of plate assemblies are movably connected in sequence, and the water passages of the plurality of plate assemblies are connected in sequence, and the buoyancy of the water in the water outlet box 16 causes the plurality of plate assemblies to tilt from a vertical state. Figure 1 As shown, the hydraulic inclined plate is divided into three sections of hinged plate components. When there is no water buoyancy, each plate component is in a vertical state. When water is discharged, three sections of inclined plate space are formed due to the buoyancy to further intercept pollutants. After the water passes through the hydraulic inclined plate 7, it is discharged through the water outlet 13 of the flotation tank.

[0070] Preferably, a water inlet observation port 17 is provided above the water inlet box 14, and a scraping observation port 18 is provided above the air flotation box 15, and both the water inlet observation port 17 and the scraping observation port 18 are located at the top of the air flotation tank device 1. The water inlet observation port 17 is used to observe the water inlet condition in the water inlet box 14, and the scraping observation port 18 is used to observe the scraping and collecting condition of the scraping assembly.

[0071] In addition, the mud discharge assembly 5 also includes a mud discharge pipe 52. The bottom of the air flotation box 15 is set as a spherical surface. The bottom of the air flotation box 15 is the bottom of the air flotation tank device 1. The inner bottom surface of the air flotation box 15 is connected to the outside of the air flotation tank device 1 through the mud discharge pipe 52. The mud discharge pipe valve 53 is provided on the mud discharge pipe 52. The mud discharge operation and maintenance are controlled by the mud discharge pipe valve 53.

[0072] Embodiment 2:

[0073] This embodiment proposes a sewage treatment system, such as Figure 3 As shown, the sewage treatment system includes a flotation tank device 1 and a plurality of filler tank devices 8. The filler tank device 8 is provided with biological fillers in a fixed or fluidized state, and the flotation tank outlet 13 of the flotation tank device 1 is connected to one or more filler tank devices 8 through a connecting pipe 19. Preferably, the plurality of filler tank devices 8 are connected in parallel. The sewage to be treated is first treated by the flotation tank device 1, and the effluent is treated by one or more filler tank devices 8 through a pipeline, and finally the effluent is discharged or coupled with other processes.

[0074] The process combination of the sewage treatment system can be operated in two groups in series or individually, and the order can be changed, such as using multi-pole series connection, selective series connection, etc. The sewage treatment system is flexible, efficient and convenient to assemble. Specifically, in some other embodiments, the sewage treatment system proposed in the present application can be operated as a single flotation tank device 1, can be operated as a single or multiple filling tank devices 8, the effluent of the flotation tank device 1 can be connected to one or more filling tank devices 8, or the effluent of one or more filling tank devices 8 can be connected to the flotation tank device 1, and multiple filling tank devices 8 can be connected in series or in series-parallel combination, all within the protection scope of the present application.

[0075] The packing tank device 8 is provided with an aeration assembly 9, combined with Figure 4 As shown, the aeration assembly 9 includes an aeration pipeline 91 and a plurality of aeration heads 92. The aeration pipeline 91 is configured as a disc-shaped pipeline network structure along the horizontal direction. Preferably, the plurality of aeration heads 92 are distributed on the aeration pipeline 91 and arranged in an array.

[0076] Preferably, a packing support 84 and a plurality of biological packing modules 83 are also provided in the packing pool device 8. The packing support 84 is provided above the aeration pipeline 91. The plurality of biological packing modules 83 are placed on the packing support 84 and are laid in a horizontal direction. The aeration head 92 is provided in a tubular shape along the vertical direction. The plurality of aeration heads 92 are respectively inserted into the plurality of biological packing modules 83. Further preferably, the biological packing module 83 can adopt a finished packing box. The cross section of the finished packing box can be a rectangle, a square or an irregular shape suitable for the outer shell of the packing pool device 8. The plurality of finished packing boxes are arranged adjacently on the packing support 84. The aeration heads 92 can be designed in a tubular shape, a tree shape, etc., and are respectively inserted into the finished packing boxes to organize the gas flow in the packing boxes.

[0077] The aeration generated by the aeration head enters the biological filler module and organizes the gas flow through the structural design, making the aeration effect of the filler tank device higher. The aeration component can perform anoxic or anaerobic reaction without aeration according to actual conditions.

[0078] like Figure 3 As shown, the filler pool device 8 includes a filler pool water inlet 81 and a filler pool water outlet 82, the filler pool water inlet 81 is located at the bottom of the filler pool device 8, the filler pool water outlet 82 is located at the top of the filler pool device 8, and a filler pool water outlet trough 87 is also provided above the multiple biological filler modules 83 in the filler pool device 8. The water treated by the flotation pool device 1 enters the filler pool device 8 from the filler pool water inlet 81, enters the filler pool water outlet trough 87 after being treated by the biological filler, and is discharged from the filler pool device 8 through the filler pool water outlet 82.

[0079] A filling pool water inlet valve 86 is provided at the filling pool water inlet 81, and the filling pool water outlets 82 of the multiple filling pool devices 8 are connected by pipelines, and a filling pool water outlet valve 85 is also provided at each filling pool water outlet 82. By controlling the water inlet and outlet valves of multiple parallel filling pool devices 8, the number of filling pool devices 8 participating in sewage treatment can be flexibly controlled.

[0080] In summary, from the above description, it can be seen that the above two embodiments of the utility model achieve the following technical effects:

[0081] 1. The flotation tank device is designed with an internal rotating component that can drive the scraper and the scraper to rotate respectively, so that the solid impurities floating on the top of the liquid surface and the bottom of the water body formed by the fusion of micro-nano flotation and influent water can be quickly removed and discharged. If there are many bubbles, they can be quickly eliminated by the foam elimination component, so that the flotation tank device can quickly and efficiently treat the water body in the flotation box that forms a three-phase separation state of solid, liquid and gas, and has a large processing load and high processing efficiency.

[0082] 2. The flotation tank device designs the specific structures of the slag collecting part and the slag scraping part. The first bending part is elastically deformed by the relative movement of the first bending part and the first inclined portion, so that the pollutants scraped off during the rotation of the first bending part are quickly collected in the slag collecting part, and the sealing between the slag scraping part and the slag collecting part is ensured by designing the second bending part.

[0083] 3. The flotation tank device is designed with a rotating assembly including an upper transmission shaft, a lower transmission shaft and a coaxial transmission, so that the scraper assembly at the water surface and the mud scraper assembly at the bottom of the water body can achieve coaxial operation, and can also adjust their respective rotation speeds to adapt to different treatment efficiencies. The flotation tank device has a simple structure and is easy to operate and maintain.

[0084] 4. The flotation tank device is designed with a hydraulic inclined plate in the outlet tank. When the outlet water passes through the outlet tank, multiple plate components of the hydraulic inclined plate are tilted by buoyancy to form multiple sections of inclined plate space to further intercept pollutants.

[0085] 5. This sewage treatment system is combined with a flotation tank device and a plurality of filler tank devices connected in parallel. It can be operated in two groups or individually, and the order can be changed. Different numbers of filler tank devices can be selected according to the situation, making the assembly of the entire sewage treatment system flexible, efficient and convenient, and the manufacturing and operation and maintenance costs are low.

[0086] 6. The filler tank device of the sewage treatment system is designed with a matching relationship between the aeration head of the aeration component and the biological filler module. The aeration generated by the aeration head enters the biological filler module and the gas flow is organized through structural design, so that the aeration effect of the filler tank device is higher. The aeration component can be not aerated according to actual conditions to perform anoxic or anaerobic reaction.

[0087] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A flotation tank device, comprising a flotation tank aeration pipe (12), through which water in the flotation tank device is aerated, characterized in that: Also includes the following components: A rotating assembly (6), wherein the rotating assembly (6) is disposed in the air flotation tank device (1), and the rotating assembly (6) is rotatable; A scraping assembly (4), the scraping assembly (4) comprising a scraping member (41) and a scraping collecting member (42), the scraping member (41) being close to the surface of a water body, the rotating assembly (6) driving the scraping member (41) to rotate and scrape off pollutants on the surface of the water body, the scraping collecting member (42) being arranged on a rotating path of the scraping member (41), and the scraping collecting member (42) collecting pollutants contained in the scraping member (41); A mud discharge assembly (5) is arranged at the bottom of the flotation tank device (1), and the mud discharge assembly (5) comprises a mud scraper (51). The rotating assembly (6) drives the mud scraper (51) to rotate and scrape pollutants at the bottom of the water body.

2. The flotation tank device according to claim 1, characterized in that: The flotation tank device (1) is divided into a water inlet box (14), an air flotation box (15) and a water outlet box (16) which are connected in sequence. The rotating assembly (6), the scraper (41) and the mud scraper (51) are all located in the air flotation box (15).

3. The flotation tank device according to claim 2, characterized in that: The scraper (41) comprises a first bent portion (45), the first bent portion (45) being located 2 to 3 cm below the water surface in the air flotation box (15), and the first bent portion (45) contains pollutants on the water surface.

4. The flotation tank device according to claim 3, characterized in that: A first inclined surface (47) is provided on one side of the slag collecting member (42), and the first bending portion (45) moves relative to the first inclined surface (47) so that the first bending portion (45) is elastically deformed.

5. The flotation tank device according to claim 4, characterized in that: A second inclined surface (48) is provided on the other side of the slag collecting member (42), and the slag scraping assembly (4) further comprises a slag discharge bucket (43), and the first inclined surface (47) and the second inclined surface (48) are connected to the slag discharge bucket (43).

6. The flotation tank device according to claim 5, characterized in that: The scraper (41) further comprises a second bending portion (46), the second bending portion (46) being connected to the end of the first bending portion (45), the bending radius of the second bending portion (46) being smaller than that of the first bending portion (45), and the second bending portion (46) being in contact with the first inclined portion (47) and the second inclined portion (48) in sequence.

7. The flotation tank device according to claim 5, characterized in that: The scraping assembly (4) further comprises a slag discharge pipe (44), wherein the slag discharge pipe (44) is located at the bottom of the slag discharge bucket (43), and the slag discharge bucket (43) is connected to the outside of the flotation tank device (1) through the slag discharge pipe (44).

8. The flotation tank device according to any one of claims 1 to 7, characterized in that: The rotating assembly (6) comprises a driver (61), an upper transmission shaft (62) and a lower transmission shaft (64); the driver (61) drives the upper transmission shaft (62) and the lower transmission shaft (64) to rotate; the scraper (41) is connected to the circumference of the upper transmission shaft (62) via a scraper bracket; and the scraper (51) is connected to the circumference of the lower transmission shaft (64) via a scraper bracket.

9. The flotation tank device according to claim 8, characterized in that: A coaxial transmission (63) is provided between the upper transmission shaft (62) and the lower transmission shaft (64), the driver (61) is provided above the upper transmission shaft (62), and the scraper (41) and the mud scraper (51) rotate coaxially.

10. The flotation tank device according to claim 2, characterized in that: A hydraulic inclined plate (7) is arranged in the water outlet box (16), and the hydraulic inclined plate (7) includes a plurality of plate assemblies, and the plate assemblies are provided with a plurality of water passages. The plurality of plate assemblies are movably connected in sequence, and the water passages of the plurality of plate assemblies are connected in sequence. The buoyancy of the water in the water outlet box (16) causes the plurality of plate assemblies to tilt from a vertical state.

11. The flotation tank device according to claim 2, characterized in that: A foam elimination component (3) is arranged in the air flotation box (15), and the foam elimination component (3) is arranged above the liquid surface of the water body.

12. The flotation tank device according to claim 11, characterized in that: The foam elimination component (3) comprises a spray pipe (31), the spray pipe (31) is located above the scraping component (4), the spray pipe (31) has a multi-circle annular structure, and each circle of the spray pipe (31) has a plurality of injection ports.

13. The flotation tank device according to claim 2, characterized in that: The flotation tank device (1) comprises a sewage inlet (11) and a flotation tank outlet (13); the flotation tank aeration pipe (12) is located 0.3 to 0.4 m below the sewage inlet (11); and the flotation tank aeration pipe (12) is connected to a nano aerator (2).

14. The flotation tank device according to claim 13, characterized in that: The upper part of the water inlet box (14) is connected to the upper part of the flotation box (15), and the lower part of the flotation box (15) is connected to the lower part of the water outlet box (16). The flotation pool aeration pipe (12) and the sewage inlet (11) are both located below the water inlet box (14), and the flotation pool outlet (13) is located above the water outlet box (16).

15. The flotation tank device according to claim 3, characterized in that: A water inlet observation port (17) is provided above the water inlet box (14), and a scraping observation port (18) is provided above the air flotation box (15). Both the water inlet observation port (17) and the scraping observation port (18) are located at the top of the air flotation tank device (1).

16. The flotation tank device according to claim 2, characterized in that: The mud discharge assembly (5) further comprises a mud discharge pipe (52), the bottom of the air flotation box (15) is arranged as a spherical surface, the inner bottom surface of the air flotation box (15) is connected to the outside of the air flotation tank device (1) through the mud discharge pipe (52), and a mud discharge pipe valve (53) is arranged on the mud discharge pipe (52).

17. A sewage treatment system, characterized in that: It comprises an air flotation pond device (1) according to any one of claims 1 to 16, and also comprises a plurality of filler pond devices (8), wherein the filler pond devices (8) are provided with biological fillers in a fixed or fluidized state, and the air flotation pond device (1) is connected to one or more of the filler pond devices (8).

18. The sewage treatment system according to claim 17, characterized in that: An aeration assembly (9) is arranged in the filler pool device (8), and the aeration assembly (9) comprises an aeration pipeline (91) and a plurality of aeration heads (92). The aeration pipeline (91) is arranged as a disc-shaped pipeline network structure along the horizontal direction, and the plurality of aeration heads (92) are distributed on the aeration pipeline (91) and arranged in an array.

19. The sewage treatment system according to claim 18, characterized in that: The filler pool device (8) is also provided with a filler support (84) and a plurality of biological filler modules (83); the filler support (84) is arranged above the aeration pipeline (91); the plurality of biological filler modules (83) are placed on the filler support (84) and are spliced ​​and laid in the horizontal direction; the aeration head (92) is arranged in a tubular shape along the vertical direction; the plurality of aeration heads (92) are respectively inserted into the plurality of biological filler modules (83).

20. The sewage treatment system according to claim 19, characterized in that: The filler pool device (8) comprises a filler pool water inlet (81) and a filler pool water outlet (82), wherein the filler pool water inlet (81) is located at the bottom of the filler pool device (8), and the filler pool water outlet (82) is located at the top of the filler pool device (8). A filler pool water outlet trough (87) is also provided above the plurality of biological filler modules (83) in the filler pool device (8).

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