Aeration loop overflow sewage treatment integrated device and sewage treatment system

Abstract

The present invention relates to an integrated aeration loop overflow device and a sewage treatment system, comprising a sewage treatment tank, an integrated aeration loop overflow device arranged in the upper part of the sewage treatment tank, and an aeration device arranged below the integrated aeration loop overflow device; the integrated aeration loop overflow device comprises a first guide channel formed by vertically arranged plates, a second guide channel formed by plates in a trumpet shape and connected to the bottom of the first guide channel, and an outer guide channel formed by vertically arranged plates and sleeved on the outer periphery of the first guide channel; the height of the outer guide channel is greater than the height of the first guide channel, and the top of the first guide channel is configured not to exceed the highest water level of the sewage to be treated. By adopting the above technical solution, the sewage treatment efficiency is improved and the operating energy consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to an integrated aeration, circulation and overflow device and a sewage treatment system. Background Art

[0002] In the field of sewage treatment, if the biochemical section adopts A / O, A 2 / O and other processes basically make functional partitions on a plane, which generally have the problems of large floor space, high energy consumption, and difficult management and maintenance.

[0003] By utilizing classical chemical engineering theory and ingenious structural design, the anoxic (A section) and aerobic (O section) aeration biochemical reactions and sedimentation overflow effluent are vertically integrated into one, which can significantly increase the sludge concentration and volumetric load of the sewage treatment system, shorten the reaction time, and make the entire sewage treatment system occupy a smaller area and start up faster.

[0004] However, conventional aeration circulation devices still have the problem of low integration and require a variety of other components to be equipped; at the same time, there is also the problem of high energy consumption. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the purpose of this application is to provide an integrated aeration and overflow sewage treatment device and a sewage treatment system, which has the effect of improving the construction efficiency of sewage treatment projects, reducing the footprint of facilities, and reducing operating energy consumption.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] In a first aspect, an aeration, circulation and overflow integrated device is provided, comprising a first guide channel formed by vertically arranged plates, a second guide channel formed by plates in a trumpet shape and connected to the bottom of the first guide channel, and an outer guide channel formed by vertically arranged plates and sleeved on the outer periphery of the first guide channel; the height of the outer guide channel is greater than the height of the first guide channel, and the top of the first guide channel is configured not to exceed the highest water level line of the sewage to be treated.

[0008] By adopting the above technical solution, a second guide channel is formed by plates in a trumpet shape and connected to the bottom of the first guide channel, so that the second guide channel can converge the rising airflow, thereby expanding the convergence range of the second guide channel; at the same time, the inclined side walls of the second guide channel cause the water mixture to collide with the side walls of the second guide channel during the convergence process, so that the mixing effect of the second guide channel is better, allowing sewage and activated sludge or chemicals to fully contact, thereby improving the treatment efficiency of sewage; at the same time, the aeration, circulation and overflow integrated device is easy to install and does not require a variety of other components to cooperate, thereby improving the construction efficiency of the sewage treatment project. By connecting the bottom end of the first guide channel with the top end of the second guide channel, when the water mixture converges in the second guide channel, the water mixture enters the relatively narrow first guide channel, which can increase the rising rate of the water mixture, avoid the weakening of the circulation due to insufficient aeration, and avoid the sludge deposition in the sedimentation area blocking the circulation channel, shorten the reaction time, and make the entire sewage treatment system more intensive, occupy a smaller area, and start faster.

[0009] The present invention is further configured such that the height of the bottom end of the outer guide channel at least extends to the lower part of the first guide channel.

[0010] By adopting the above technical solution, the water mixture reaches the middle area of ​​the clarification and separation functional zone, avoiding the water mixture from directly flowing out of the overflow tank without being effectively stratified, thereby improving the efficiency of the clarification and separation functional zone.

[0011] The present invention is further configured such that an outer angle between a side wall of the second guide channel and a side wall of the first guide channel is set in a range of 130-160°.

[0012] By adopting the above technical solution, the water mixture is facilitated to form convection during the collision with the second diversion channel, thereby improving the mixing effect of the second diversion channel.

[0013] The present invention is further configured such that: the height of the outer guide channel exceeds the height of the first guide channel by 300-1000 mm.

[0014] By adopting the above technical solution, it is prevented that the water mixture rising to the top of the first diversion channel directly flows over the outer diversion channel into the clarification and separation functional area, causing interference to the clarification and separation functional area.

[0015] The present invention is further configured as follows: an overflow trough is installed on the outer side wall of the outer guide channel, a water collecting bucket is provided at one end of the overflow trough, and the water collecting bucket and the overflow trough are connected to each other.

[0016] By adopting the above technical solution, the clean water separated in the clarification and separation functional area overflows into the overflow trough, making it convenient for the sewage treatment pool to discharge the separated clean water in time.

[0017] The present invention is further configured such that the top of the side wall of the overflow trough is 0-100 mm lower than the top of the first guide channel.

[0018] By adopting the above technical solution, the overflow trough can collect the clean water above the water level line of the sewage treatment tank.

[0019] The present invention is further configured such that: the overflow groove is arranged along the entire periphery of the outer guide channel.

[0020] By adopting the above technical solution, the water collection efficiency of the overflow trough is improved and the space utilization rate of the integrated aeration loop overflow device is increased.

[0021] The present invention is further configured as follows: the upper opening of the outer guide channel is covered with an air collecting hood, and the upper part of the air collecting hood is connected to an exhaust pipe.

[0022] By adopting the above technical solution, the odor generated during the sewage treatment process can be collected in a unified manner to prevent the gas from escaping into the air and causing air pollution, which is beneficial to protecting the environment and reducing the impact of the device operation on the environment.

[0023] The present invention is further configured such that: the aeration, circulation and overflow integrated device is configured as a rectangular body or a cylindrical body.

[0024] By adopting the above technical solution, the device can be of different shapes and can achieve the same technical effect, thereby improving the adaptability of the device.

[0025] The present invention is further configured such that: when the aeration, ring and overflow integrated device is configured as a rectangular body, the short side length of the first guide channel ranges from 300 to 1400 mm, and the short side length of the bottom of the second guide channel ranges from 2300 to 4000 mm.

[0026] By adopting the above technical solution, the first diversion channel is narrower than the second diversion channel, which can increase the rising rate of the water mixture and avoid the weakening of circulation due to insufficient aeration, resulting in sludge deposition in the sedimentation area and blocking the circulation channel.

[0027] The present invention is further configured as follows: the distance between the inner side wall of the outer guide channel and the outer side wall of the first guide channel is L1, the short side distance of the first guide channel is L2, and L1 is 1 / 10-1 / 3 of L2.

[0028] By adopting the above technical solution, the flow velocity of the water mixture in the downflow channel is increased under the action of gravity, thereby avoiding the phenomenon of backflow of the water mixture.

[0029] The present invention is further configured as follows: the overflow trough is located in the long side direction of the outer diversion channel, the water collecting buckets are connected to each other, and any of the water collecting buckets discharges the water in the water collecting bucket through an external siphon tube.

[0030] By adopting the above technical solution, there is no need to set up multiple siphon tubes, which reduces the manufacturing cost of the device. Moreover, a single siphon tube extends from the upper end of the gas collecting hood, which is convenient for the installation and disassembly of the gas collecting hood, making the installation efficiency of the device higher.

[0031] The present invention is further configured as follows: a plurality of mutually separated supporting feet are provided at the bottom of the second guide channel, and the supporting feet are 50-100 mm longer than the edge of the second guide channel in the vertical direction.

[0032] By adopting the above technical solution, the aeration and overflow integrated device is raised by the supporting legs, and then a gap is set below the aeration and overflow integrated device, which is conducive to the formation of circulation; at the same time, it serves to isolate the interference of bubbles generated by the aeration device, making it easier to statically settle the water mixture in the clarification and separation functional area.

[0033] In a second aspect, a sewage treatment system is provided, which includes a sewage treatment tank, an integrated aeration, loop and overflow device arranged in the upper half of the sewage treatment tank, and an aeration device arranged below the integrated aeration, loop and overflow device, wherein the integrated aeration, loop and overflow device adopts the integrated aeration, loop and overflow device as described in any one of claims 1 to 13.

[0034] By adopting the above technical solution, a loop is formed in the system, which enables more complete biochemical reactions in the biochemical reaction sedimentation tank, thereby improving sewage treatment efficiency. At the same time, the aeration device provides the power for mixing sewage, chemicals, etc. for the chemical reactions in the sewage treatment tank, providing suitable living conditions for microorganisms in the biological reaction, thereby ensuring the efficient conduct of the biochemical reaction. Under the aeration effect of the aeration device, the water mixture rises and mixes in the overflow of the aeration loop, which facilitates the vertical arrangement of different reaction zones in the biochemical reaction sedimentation tank, thereby maximizing sewage treatment efficiency within a limited footprint and helping to reduce the sewage treatment area.

[0035] The present invention is further configured as follows: the sewage treatment pool is equipped with a vertically arranged return pipe, the return pipe extends along the internal channels of the second diversion channel and the first diversion channel to the bottom of the pool, and the top of the return pipe is flush with or 0-100 mm lower than the top of the first diversion channel.

[0036] By adopting the above technical solution, the circulation effect of the water mixture is improved, forming an internal and external double circulation circulation, and improving the efficiency of sewage treatment.

[0037] The present invention is further configured as follows: the reflux pipe is a hollow pipe with an upper opening, and a plurality of reflux holes are provided on the pipe wall at the lower end of the reflux pipe.

[0038] By adopting the above technical solution, the water mixture is facilitated to flow back to the bottom of the sewage treatment tank.

[0039] The present invention is further configured as follows: the aeration device is installed on the pipe wall of the return pipe, and the aeration port of the aeration device opens toward the bottom of the second guide channel.

[0040] By adopting the above technical solution, the rising airflow generated by the aeration device during the aeration process is utilized, and there is no need to provide additional power for the air rise circulation, which plays a role in saving energy consumption.

[0041] The present invention is further configured such that: the aeration device is connected to an air pipe communicating with the outside.

[0042] By adopting the above technical solution, compressed air enters the aeration device through the air pipe to provide oxygen for the biological treatment of sewage.

[0043] The present invention is further configured such that a preset distance from the aeration device to the bottom of the sewage treatment tank is 1600-5000 mm, and the aeration device forms an aerobic section and an anoxic section above and below the sewage treatment tank, respectively.

[0044] By adopting the above technical solution, anoxic sections and aerobic sections are set up vertically at the same time, which not only reduces the footprint of the device, but also has a more significant effect on COD removal, nitrogen and phosphorus removal, heavy metal adsorption, and degradation of toxic substances.

[0045] The present invention is further configured as follows: the aeration device is located at the bottom of the sewage treatment tank, and the aeration device forms an aerobic section above the sewage treatment tank.

[0046] By adopting the above technical solutions, the adaptability of the device can be improved and corresponding adjustments can be made for different situations.

[0047] The present invention is further configured such that: the sewage treatment tank is equipped with a plurality of modular beams that support the aeration, circulation and overflow integrated device.

[0048] By adopting the above technical solution, a supporting role is played on the aeration and overflow integrated device, and the stability performance of the device is improved.

[0049] The present invention is further configured as follows: the sewage treatment tank is horizontally installed with a plurality of air baffles arranged perpendicularly to the module beams, and the air baffles and the module beams are on the same horizontal plane and are interconnected.

[0050] By adopting the above technical solution, the interference of bubbles generated by the aeration device can be isolated, making it easier to statically settle the water mixture in the clarification and separation functional area.

[0051] The present invention is further configured such that: the projections of the module beam and the air baffle in the vertical direction cover the projection of the bottom contour of the second guide channel in the vertical direction.

[0052] By adopting the above technical solution, the interference of bubbles generated by the aeration device can be isolated, making it easier to statically settle the water mixture in the clarification and separation functional area.

[0053] The present invention is further configured such that the bottoms of adjacent integrated aeration, ring and overflow devices are spaced at a distance of at least greater than 50 mm in the long side direction.

[0054] By adopting the above technical solution, it is convenient for the water mixture separated in the clarification and separation functional area to form a circulation.

[0055] The present invention is further configured such that: adjacent outer side walls of the aeration, loop and overflow integrated devices jointly form a clarification and separation functional area, and the clarification and separation functional area is communicated with the outer guide channel.

[0056] By adopting the above technical solution, the water mixture enters the clarification and separation functional area through the downflow channel for static sedimentation.

[0057] In summary, the present invention has the following beneficial effects:

[0058] 1. The second diversion channel, formed of a trumpet-shaped plate and connected to the bottom of the first diversion channel, can converge the rising airflow, expanding the confluence range of the second diversion channel. At the same time, the inclined sidewalls of the second diversion channel cause the water mixture to collide with the sidewalls of the second diversion channel during the converging process, resulting in a better mixing effect in the second diversion channel, allowing sewage and activated sludge or chemicals to fully contact each other, thereby improving sewage treatment efficiency.

[0059] 2. The bottom end of the first diversion channel is connected to the top end of the second diversion channel. When the water mixture is merged in the second diversion channel, it enters the relatively narrow first diversion channel, which can increase the rising rate of the water mixture, avoid the weakening of the circulation due to insufficient aeration, and prevent the sludge deposition in the sedimentation area from blocking the circulation channel. The reaction time is shortened, making the entire sewage treatment system more intensive, occupying a smaller area, and starting faster.

[0060] 3. By forming a circulation in the system, the biochemical reaction in the biochemical reaction sedimentation tank is made more complete, thereby improving the quality of sewage treatment; at the same time, the aeration device is used to provide the power of mixing sewage, chemical agents, etc. for the chemical reaction in the sewage treatment tank, and to provide suitable survival conditions for microorganisms for the biological reaction, so as to ensure the efficient progress of the biochemical reaction; at the same time, under the aeration action of the aeration device, the water mixture rises and mixes in the aeration loop overflow, which is conducive to the vertical setting of areas with different reaction modes in the biochemical reaction sedimentation tank, thereby maximizing the sewage treatment efficiency within a limited area, which is conducive to reducing the area occupied by sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 Schematic diagram of the structure of the integrated device of this embodiment;

[0062] Figure 2 Schematic diagram of the structure of the gas collecting hood of this embodiment;

[0063] Figure 3 Schematic diagram of the structure of the aeration and overflow integrated device of this embodiment;

[0064] Figure 4 This is a structural cross-sectional view of the integrated aeration and overflow device of this embodiment;

[0065] Figure 5 Schematic diagram of the structure of the module beam and the air baffle of this embodiment;

[0066] Figure 6 This is an overall schematic diagram of the circular aeration and overflow integrated device of this embodiment;

[0067] Figure 7 This is an overall top view of the circular aeration and overflow integrated device of this embodiment;

[0068] Figure 8 This is a working condition flow chart of this embodiment.

[0069] Figure numerals: 1. sewage treatment tank; 11. module beam; 12. air baffle; 21. first guide channel; 22. second guide channel; 221. support leg; 23. outer guide channel; 3. overflow trough; 31. water collecting bucket; 4. air collecting hood; 41. exhaust pipe; 5. return pipe; 6. aeration device; 7. air pipe; 8. connector; 9. return seam. DETAILED DESCRIPTION

[0070] The present invention will be further described below in conjunction with the accompanying drawings and exemplary embodiments, wherein identical reference numerals throughout the accompanying drawings refer to identical components. In addition, if detailed description of known techniques is unnecessary for illustrating features of the present invention, it will be omitted.

[0071] The description of the embodiments should be detailed enough to enable those skilled in the art to implement the technical solution without inventiveness. The embodiments may be one or more, depending on the specific circumstances, to support the scope of protection.

[0072] For product inventions, the detailed description should include a detailed description of the product's mechanical structure, along with accompanying drawings, explaining the relationships between its components, such as their connections and coordination. Where necessary, the description should also include the operating procedures or steps involved. For method inventions, in addition to describing the steps involved, the process conditions should also be described.

[0073] like Figure 1 and Figure 2 As shown, the present invention discloses an integrated aeration-loop-overflow device and a sewage treatment system, including a sewage treatment tank 1, an integrated aeration-loop device and an aeration device arranged below the integrated aeration-loop-overflow device are installed on the upper half of the sewage treatment tank 1, the integrated aeration-loop device includes a first guide channel 21 enclosed by vertically arranged plates, a second guide channel 22 enclosed by plates into a trumpet shape and connected to the bottom of the first guide channel 21, and an outer guide channel 23 enclosed by vertically arranged plates and sleeved on the outer periphery of the first guide channel 21; the height of the outer guide channel 23 is greater than the height of the first guide channel 21, and the top of the first guide channel 21 is configured not to exceed the highest water level line of the sewage to be treated, which plays a role in improving the efficiency of sewage treatment, while reducing energy consumption and playing a role in energy saving and environmental protection.

[0074] like Figure 3 and Figure 4 As shown, when the exposure-ring-overflow integrated device is configured as a rectangular body, the height of the exposure-ring-overflow integrated device is 2600-2800 mm, the short side distance range of the first guide channel 21 is 300-1400 mm, the short side distance range of the bottom of the second guide channel 22 is 2300-4000 mm, the angle between the side wall of the second guide channel 22 and the side wall of the first guide channel 21 is set in the range of 130-160°, and a plurality of separated support legs 221 are provided at the bottom of the second guide channel 22. The support legs 221 are respectively fixedly connected to the four corners of the bottom of the second guide channel, and the support legs 221 are 50-100 mm longer in the vertical direction than the edge of the second guide channel 22.

[0075] The outer guide channels 23 are fixedly connected at the corners of the first guide channels 21. The cross-section of the outer guide channels 23 is four groups of centrally symmetrical rectangular frames. The height of the outer guide channels 23 exceeds the height of the first guide channels 21 by 300-1000 mm. The height of the bottom end of the outer guide channel 23 extends at least to the lower part of the first guide channel 21. The distance between the inner side wall of the outer guide channel 23 and the outer side wall of the first guide channel 21 is L1, and the short side distance of the first guide channel 21 is L2. L1 is 1 / 10-1 / 3 of L2.

[0076] Specifically, the short side distance of the first guide channel 21 is selected to be 800mm, and the long side distance is 5000mm, so its height is 1200mm; the short side distance at the bottom of the second guide channel 22 is selected to be 2800mm, so its height is 1000mm. The long side distance from top to bottom of the second guide channel 22 is 5000mm, and the height of the support leg 221 is selected to be 100mm; the angle between the opposing side walls of the second guide channel 22 is 135°. Since L2 is 800mm, L1 is selected to be 200mm. The bottom end of the outer guide channel 23 is set flush with the lower end of the first guide channel 21.

[0077] The outer wall of the outer diversion channel 23 is installed with an overflow trough 3 composed of an L-shaped plate. The top of the side wall of the overflow trough 3 is 0-100mm lower than the top of the first diversion channel 21. The overflow trough 3 is arranged along the outer circumference of the outer diversion channel 23. The overflow trough 3 is welded to the upper and middle parts of the two groups of long sides of the outer wall of the outer diversion channel 23. A water collecting bucket 31 is connected below one end of the overflow trough 3. The two groups of water collecting buckets 31 are respectively connected at the bottom with U-shaped tubes. The two groups of water collecting buckets 31 are connected to each other through the U-shaped tube. Any water collecting bucket 31 is connected to a vertically arranged siphon tube, and the siphon tube extends upward through the air collecting hood 4 to the outlet channel of the sewage treatment tank 1.

[0078] In another embodiment, the overflow trough 3 can be independent of the aeration overflow integrated device, and the overflow trough 3 can be fixed on the side wall of the sewage treatment tank 1, and also plays the role of collecting and discharging the clean water from the clarification and separation functional area.

[0079] The middle bottom of the U-shaped tube is connected to a downwardly extending drainage hose, and the other end of the drainage hose extends out of the sewage treatment tank 1. The clean water in the water collection bucket 31 is discharged through the drainage hose by the action of the water's own gravity.

[0080] like Figure 5As shown, the sewage treatment tank 1 is fixed with a number of module beams 11 and air baffles 12, the height of both the module beams 11 and the air baffles 12 is 3200 mm, and the air baffles 12 and the module beams 11 are arranged perpendicular to each other, among which the air baffles 12 are distributed horizontally and the module beams 11 are distributed longitudinally. The module beams 11 and the air baffles 12 are at the same horizontal height and are connected to each other, and the four groups of legs 221 are respectively placed on the upper end surfaces of adjacent module beams 11, and the vertical projections of the module beams 11 and the air baffles 12 cover the vertical projection of the bottom contour of the second guide channel 22, which plays a role in raising the aeration and return integrated device as a whole; at the same time, a return seam 9 of a preset height is reserved between the bottom end of the aeration and return integrated device and the upper end surfaces of the module beams 11 and the air baffles 12, and the distance between the bottoms of adjacent aeration and return integrated devices in the long side direction is at least greater than 50 mm.

[0081] Another embodiment is, Figure 6 and Figure 7 As shown, when the aeration, circulation, and overflow integrated device is configured as a circular body, the first guide channel 21 is cylindrical in shape, the second guide channel 22 is trumpet-shaped, the bottom end of the first guide channel 21 is fixedly connected to the top end of the second guide channel 22, the outer guide channel 23 is cylindrical in shape, surrounding the outside of the first guide channel 21, and a plurality of connectors are provided between the inner sidewall of the outer guide channel 23 and the outer sidewall of the first guide channel 21. One end of the connector is fixedly connected to the inner sidewall of the outer guide channel 23, and the other end of the connector is fixedly connected to the outer sidewall of the first guide channel 21. The overflow trough 3 is arranged along the outer sidewall of the outer guide channel 23 at the same horizontal height, and the cross-section of the overflow trough 3 is annular. The spacing between the bottoms of adjacent aeration and overflow integrated devices is at least greater than 50 mm.

[0082] The sewage treatment tank 1 is installed with a number of modular beams 11 and air baffles 12, which are staggered to form a grid structure. The air baffles 12 and the modular beams 11 are on the same horizontal plane and are interconnected. The vertical projection of each single grid coincides with the vertical projection of the bottom contour of the second diversion channel 22.

[0083] A vertical return pipe 5 is fixedly connected to the bottom of the sewage treatment tank 1. This pipe extends along the interior of both the second diversion channel 22 and the first diversion channel 21 to the tank bottom. The top of the return pipe 5 is 0-100 mm lower than the top of the first diversion channel 21. The return pipe 5 is 2300 mm long and 200 mm in diameter. The return pipe 5 is a hollow tube with an upper opening, and a number of return holes are defined in the lower wall of the return pipe 5.

[0084] The aeration device 6 is installed on the return pipe 5. The aeration port of the aeration device 6 is arranged vertically upward and is opposite to the lower opening of the second guide channel 22. The aeration device 6 includes an aerator stand, and the aeration stand is fixedly connected to a plurality of aerators. The aerator is connected to an air pipe connected to the outside world, and the other end of the air pipe is connected to a blower set up outside, thereby continuously pumping air into the aerator.

[0085] The preset distance from the aeration device 6 to the bottom of the sewage treatment tank 1 is 1600-5000 mm. The aeration device 6 forms an aerobic section and an anoxic section above and below the sewage treatment tank 1 respectively, wherein the aerobic section and the anoxic zone together constitute a biochemical reaction area.

[0086] In another embodiment, the aeration device 6 is located at the bottom end of the sewage treatment tank 1, and the aeration port of the aeration device 6 is still vertically upward and arranged opposite to the lower opening of the second guide channel 22. The aeration device 6 forms an aerobic section above the sewage treatment tank 1. The height of the aerobic section is 3200 mm, and the aerobic section alone constitutes a biochemical reaction area.

[0087] The upper opening of the outer guide channel 23 is covered with an air collecting hood 4 which plays a sealing role. An exhaust pipe 41 is connected to the upper part of the air collecting hood 4. A sealing strip is added at the connection between the air collecting hood 4 and the outer guide channel 23 to make the sealing effect of the air collecting hood 4 better, avoid leakage of exhaust gas, and reduce the impact on the environment.

[0088] The opposing outer side walls of adjacent aeration and overflow integrated devices jointly form a clarification and separation functional area, and the clarification and separation functional area is connected to the biochemical reaction area via a reflux seam 9 .

[0089] The working conditions and principles of the aeration, circulation and overflow integrated device and sewage treatment system of the present invention are as follows: Figure 8 As shown, it includes the following steps:

[0090] S1, adding sewage and treatment agent into sewage treatment tank 1;

[0091] S2, the sewage undergoes biochemical reaction in sewage treatment tank 1;

[0092] S3. Under the aeration action of the aeration device 6, the water mixture is mixed by ascending flow in the second guide channel 22;

[0093] S4, the water mixture rises along the first diversion channel 21 until it reaches the top;

[0094] S5, the water mixture flows over the first diversion channel 21, flows downward along the downflow channel into the clarification and separation functional area, and / or flows back downward along the reflux pipe 5 to the bottom end of the sewage treatment tank 1;

[0095] S6. The water mixture is separated into clean water and the water mixture in the clarification and separation functional area, and the water mixture is precipitated back to the biochemical reaction area;

[0096] S7, when the clarification and separation functional area continues to separate the clean water, the clean water gradually overflows into the overflow trough 3, and is collected and discharged through the overflow trough 3;

[0097] S8. Waste gas treatment.

[0098] Optionally, in S1, sewage and a treatment agent are added to the sewage treatment tank 1, which specifically includes the following steps:

[0099] Sewage and treatment agents are dispersed to the bottom of the sewage treatment tank 1 along the water inlet pipe, and the treatment agents are chemical agents or microorganisms;

[0100] Among them, the chemical agent can be selected as a phosphorus removal agent and / or a flocculant and / or a coagulant.

[0101] Optionally, in S2, the sewage undergoes a biochemical reaction in the sewage treatment tank 1, which specifically includes the following steps:

[0102] In the aerobic section, the organic matter in the sewage is used for oxidation and nitrification.

[0103] Another embodiment is to first use the organic matter in the sewage to carry out denitrification reaction in the anoxic section;

[0104] Next, in the aerobic section, the organic matter in the sewage is used for oxidation and nitrification. Part of the nitrified liquid produced by the nitrification reaction flows back to the bottom of the sewage treatment tank 1 through the reflux pipe 5, and the other part flows back to the biochemical reaction area through the reflux seam 9.

[0105] It has the functions of removing organic matter, denitrification and dephosphorization, with a simple process flow and good sludge settling properties.

[0106] Optionally, in S3, the water mixture is mixed in the second diversion channel 22 by ascending flow, which specifically includes the following steps:

[0107] When the water level reaches the water level line of the sewage treatment tank 1, aeration is performed by starting the aeration device 6. Bubbles are generated during the aeration process. The rising action of the bubbles causes the water mixture to collide with the side wall of the second diversion channel 22, and an upflow and mixing effect is generated inside the second diversion channel 22.

[0108] Optionally, in S4, the water mixture rises along the first guide channel 21 until it reaches the top, specifically comprising the following steps:

[0109] The water mixture passes through the second guide channel 22 in sequence and merges, flows upward along the first guide channel 21, and rises to the top of the first guide channel 21 under the action of air lift force, and the bubbles are released.

[0110] Optionally, in S5, the sewage is refluxed downward along the reflux pipe 5 to the bottom end of the sewage treatment tank 1, specifically comprising the following steps:

[0111] When the water mixture loses its airlift power, the water mixture flows back downward through the top opening of the return pipe 5 under the action of gravity, and circulates back to the bottom end of the sewage treatment tank 1 through the return hole.

[0112] Optionally, in S5, flowing downward along the downflow channel into the clarification and separation functional area specifically includes the following steps:

[0113] When the water mixture loses its airlift power, the water mixture flows outward in four directions, vertically and horizontally, into the downflow channel, and flows downward along the downflow channel until it merges into the clarification and separation functional area.

[0114] Optionally, in S6, the water mixture is separated into clean water and the water mixture in the clarification and separation functional area, which specifically includes the following steps:

[0115] When the water mixture loses its airlift power, it is allowed to settle under the action of gravity. Due to the difference in density, the clean water floats toward the water level line of the sewage treatment tank 1, and the water mixture settles downward and returns to the biochemical reaction area through the reflux seam 9 to form a circulation.

[0116] Optionally, in S7, the following steps are specifically included:

[0117] When the clean water overflows into the two groups of overflow troughs 3, the clean water flows into the water collecting buckets 31 respectively. Since the two groups of water collecting buckets 31 are interconnected, the siphon tube can be started by utilizing the communicating vessel principle to discharge the clean water in the two groups of water collecting buckets 31 into the outlet channel of the sewage treatment pool 1.

[0118] Another embodiment is that when clean water overflows into the two groups of overflow troughs 3, the clean water flows into the water collecting buckets 31 respectively. Since the two groups of water collecting buckets 31 are interconnected, the water is discharged into the sewage treatment pool 1 through the drainage hose under the action of the gravity of the water itself.

[0119] Optionally, in S8, the following steps are specifically included:

[0120] Under the action of air lift power, the bubbles rise to the top of the first guide channel 21 and are released. At the same time, the waste gas generated during the biochemical reaction is released into the gas collecting hood 4 and discharged from the aeration and overflow integrated device through the exhaust pipe 41.

[0121] In summary, the integrated aeration and overflow sewage treatment device and its use method provided in this application have the following beneficial effects:

[0122] 1. The sewage treatment tank 1 of the sewage treatment system vertically combines the anoxic section, aerobic section aeration biochemical reaction, and sedimentation overflow effluent into one, which can greatly increase the sludge concentration and volume load of the sewage treatment system, shorten the reaction time, and make the entire sewage treatment system more intensive, occupy a smaller area, and start up faster.

[0123] 2. This integrated exposure loop overflow device adopts non-hanging installation and can be directly fixed on the module beam 11, which is simple and convenient.

[0124] 3. The integrated aeration, circulation and overflow device is provided with a first guide channel 21 which is narrower than the second guide channel 22 to avoid weakening of circulation due to insufficient aeration, which may cause sludge deposition in the sedimentation area to block the circulation channel.

[0125] 4. The sewage treatment pool 1 using the sewage treatment system has higher oxygen supply efficiency and better mixing effect, and the aeration loop overflow sewage treatment integrated device has a simple and reliable structure. The structure of the aeration overflow integrated device can still remain stable after being enlarged and can be used in large-scale sewage treatment projects.

[0126] 5. The sewage treatment system proposed in this application can use chemical methods or microbial methods to treat sewage, which can meet the needs of different sewage treatment projects.

[0127] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sewage treatment system, characterized in that: It comprises a sewage treatment tank (1), an aeration loop and overflow integrated device arranged in the upper part of the sewage treatment tank (1), and an aeration device (6) arranged below the aeration loop and overflow integrated device; The aeration, circulation and overflow integrated device comprises a first guide channel (21) formed by vertically arranged plates, a second guide channel (22) formed by plates in a trumpet shape and connected to the bottom of the first guide channel (21), and an outer guide channel (23) formed by vertically arranged plates and sleeved on the outer periphery of the first guide channel (21); the height of the outer guide channel (23) is greater than the height of the first guide channel (21), and the top of the first guide channel (21) is configured not to exceed the highest water level of the sewage to be treated; a plurality of mutually separated supporting legs (221) are provided at the bottom of the second guide channel (22), and the supporting legs (221) are 50-100 mm longer than the edge of the second guide channel (22) in the vertical direction; adjacent outer side walls of the aeration, circulation and overflow integrated device jointly form a clarifying and separating functional area, and the clarifying and separating functional area is connected to the outer guide channel (23); The sewage treatment tank (1) is provided with a plurality of modular beams (11) supporting the aeration loop overflow integrated device; the sewage treatment tank (1) is horizontally provided with a plurality of air baffles (12) arranged perpendicularly to the modular beams (11); the air baffles (12) and the modular beams (11) are on the same horizontal plane and are interconnected to form a grid structure; the vertical projections of the modular beams (11) and the air baffles (12) of each single grid cover the vertical projections of the bottom contour of the second guide channel (22), so as to isolate the interference of bubbles generated by the aeration device (6) and facilitate static sedimentation of the water mixture in the clarification and separation functional area; The four groups of legs (221) of the integrated aeration-circulation-return-overflow device are respectively placed on the upper end surfaces of adjacent module beams (11) for raising the integrated aeration-circulation-return-overflow device as a whole; a return flow gap (9) of a preset height is reserved between the bottom end of the integrated aeration-circulation-return-overflow device and the upper end surfaces of the module beams (11) and the air baffle plate (12); the spacing between the bottoms of adjacent integrated aeration-circulation-return-overflow devices in the long side direction is at least greater than 50 mm.

2. The sewage treatment system according to claim 1, characterized in that: The height of the bottom end of the outer flow guiding channel (23) at least extends to the lower part of the first flow guiding channel (21).

3. The sewage treatment system according to claim 1, characterized in that: The external angle between the side wall of the second flow guiding channel (22) and the side wall of the first flow guiding channel (21) is set in the range of 130-160°.

4. The sewage treatment system according to claim 1, characterized in that: The height of the outer flow guiding channel (23) exceeds the height of the first flow guiding channel (21) by 300-1000 mm.

5. The sewage treatment system according to claim 1, characterized in that: An overflow groove (3) is installed on the outer side wall of the external flow guide channel (23), a water collecting bucket (31) is arranged at one end of the overflow groove (3), and the water collecting bucket (31) and the overflow groove (3) are connected to each other.

6. The sewage treatment system according to claim 5, characterized in that: The top of the side wall of the overflow groove (3) is 0-100 mm lower than the top of the first guide channel (21).

7. The sewage treatment system according to claim 5, characterized in that: The overflow groove (3) is arranged along the entire periphery of the outer flow guide channel (23).

8. The sewage treatment system according to claim 1, characterized in that: The upper opening of the outer flow guiding channel (23) is covered with an air collecting hood (4), and an exhaust pipe (41) is connected to the upper side of the air collecting hood (4).

9. The sewage treatment system according to claim 5, characterized in that: The aeration, circulation and overflow integrated device is configured as a rectangular body or a cylindrical body.

10. The sewage treatment system according to claim 9, characterized in that: When the aeration-circulation-overflow integrated device is configured as a rectangular body, the short side length of the first guide channel (21) ranges from 300 to 1400 mm, and the short side length of the bottom of the second guide channel (22) ranges from 2300 to 4000 mm.

11. The sewage treatment system according to claim 10, characterized in that: The distance between the inner wall of the outer flow guiding channel (23) and the outer wall of the first flow guiding channel (21) is L1, the short side distance of the first flow guiding channel (21) is L2, and L1 is 1 / 10-1 / 3 of L2.

12. The sewage treatment system according to claim 10, characterized in that: The overflow trough (3) is located in the long side direction of the external diversion channel (23), and the water collecting buckets (31) are arranged to be interconnected. Any of the water collecting buckets (31) discharges the water in the water collecting bucket through an external siphon.

13. The sewage treatment system according to claim 1, characterized in that: The sewage treatment pool (1) is equipped with a vertically arranged return pipe (5), the return pipe (5) extending along the internal channels of the second guide channel (22) and the first guide channel (21) to the bottom of the pool, and the top of the return pipe (5) is 0-100 mm lower than the top of the first guide channel (21).

14. The sewage treatment system according to claim 13, characterized in that: The reflux pipe (5) is a hollow pipe with an upper opening, and a plurality of reflux holes are provided on the pipe wall at the lower end of the reflux pipe (5).

15. The sewage treatment system according to claim 13, characterized in that: The aeration device (6) is installed on the pipe wall of the return pipe (5), and the aeration port of the aeration device (6) opens toward the bottom of the second guide channel (22).

16. The sewage treatment system according to claim 15, characterized in that: The aeration device (6) is connected to an air pipe communicating with the outside world.

17. The sewage treatment system according to claim 15, characterized in that: The preset distance between the aeration device (6) and the bottom of the sewage treatment tank (1) is 1600-5000 mm, and the aeration device (6) forms an aerobic section and an anoxic section above and below the sewage treatment tank (1), respectively.

18. The sewage treatment system according to claim 15, characterized in that: The aeration device (6) is located at the bottom of the sewage treatment tank (1), and the aeration device (6) forms an aerobic section above the sewage treatment tank (1).

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