Suction suspension type diffusion aeration device

Abstract

The utility model discloses a suction suspension type diffusion aeration device which comprises a gas distribution device and suction devices, the gas distribution device distributes gas into the four suction devices around through a cross-shaped gas distribution pipe, and the suction devices form negative pressure to suck sludge at the bottom of a large-area seriously polluted water body to be treated and the periphery of the water body to be treated for mixing. The top of each suction device is communicated with two suspension cylinders through an air dispersing device, and fillers in the eight suspension cylinders can rapidly enrich microorganisms under the action of airflow and a mud-water mixture to form a biological membrane, so that sewage is treated; the cross-shaped air distribution pipe can also be used for binding a marker, and after the aeration device is placed at the bottom of a polluted water body, the position of the aeration device can be recognized outside the water body through the marker, so that the aeration device is convenient to adjust, maintain and finally recycle during operation.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment aerators, and in particular to a suction-suspension diffused aeration device. Background Technology

[0002] Due to environmental policies and increased public demand for ecological and environmental protection, more and more polluted water bodies need in-situ purification and treatment without occupying too much land to build specialized treatment plants. Large-scale disc aerators and high-efficiency jet aerators are not suitable for the treatment and ecological restoration of these polluted water bodies, especially severely polluted water bodies, where it is difficult to form stable and active biological sludge to treat pollutants in a short period of time.

[0003] Existing disc and membrane aerators require a complex piping system to be installed at the bottom of the aeration tank, offering no flexibility for adjustment. Membranes that detach during use cannot be replaced. Problems with the aeration heads can only be resolved by lowering the liquid level. While high-efficiency jet aerators offer high oxygenation efficiency, they are expensive, energy-intensive, and require additional water circulation equipment and piping.

[0004] Therefore, there is an urgent need to develop an aerator that can be flexibly positioned to treat large areas of severely polluted water bodies in order to overcome the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a suction-suspension diffused aeration device to solve the problems of high cost and difficulty in moving the equipment when treating large areas of heavily polluted water. This invention not only improves the sewage treatment capacity, but also allows for easy movement and greater flexibility.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] This utility model provides a suction-suspension diffused aeration device, comprising:

[0008] An air distribution device includes a cross-shaped air distribution pipe and an air inlet pipe disposed in the middle of the cross-shaped air distribution pipe. The cross-shaped air distribution pipe is internally connected, and the air inlet pipe is connected to the middle of the cross-shaped air distribution pipe. Right-angle pipes are connected to the lower sides of the four ends of the cross-shaped air distribution pipe, and the right-angle pipes extend outward along the cross-shaped air distribution pipe.

[0009] A suction device, connected to the air outlet of the right-angle tube, is used to support the air distribution device. The suction device includes a suction straight tube, a support bend tube, and an end straight tube connected in sequence. The suction straight tube is vertically arranged on the outer side of the cross-shaped air distribution tube, and the lower sidewall of the suction straight tube is connected to the right-angle tube. It is used to form a negative pressure to suction sludge by receiving gas from the cross-shaped air distribution tube. The ratio of the diameter of the right-angle tube to the diameter of the support bend tube is 1:2 to 1:3. The support bend tube has a plurality of first through holes evenly opened along one side of the air distribution device. The first through holes are used to suction the bottom sludge. The end straight tube extends outward along the support bend tube and is used to suction the surrounding sludge.

[0010] A suspension cylinder is used to receive a mud-water mixture from a suction device to form a biofilm. The bottom of the suspension cylinder has multiple second through holes for suctioning the mud-water mixture, and the top of the suspension cylinder has multiple third through holes for venting the liquid-solid three-phase mixture. The suspension cylinder is filled with packing material.

[0011] Optionally, it also includes a gas dispersion device, which includes a bullhorn-shaped bend and a horizontal pipe disposed at the top of the bullhorn-shaped bend. The bullhorn-shaped bend is a straight pipe in the middle with a bend extending outward at both ends. The straight pipe part of the bullhorn-shaped bend is vertically connected to the top of the suction straight pipe, and the bend part of the bullhorn-shaped bend extends into the suspension cylinder.

[0012] Optionally, the top of the bend of the horn-shaped bend is vertically connected to the horizontal pipe, and a row of fourth through holes is opened on both sides of the top of the horizontal pipe at a radial angle of 45° upward.

[0013] Optionally, multiple transverse baffles are installed vertically and horizontally inside the suspension cylinder, and two adjacent baffles are staggered and inclined. The filler is distributed on the upper and lower sides of the baffles inside the suspension cylinder.

[0014] Optionally, the plurality of the third through holes are distributed circumferentially along the center of the top of the suspension cylinder;

[0015] Multiple second through holes are circumferentially distributed along the communication port at the bottom of the suspension cylinder, and the communication port at the bottom of the suspension cylinder is used for the bend of the horn-shaped bend to extend and communicate.

[0016] Optionally, the diameter of the first through hole of the supporting bend is the same as the diameter of the second through hole and larger than the diameter of the third through hole;

[0017] The end straight pipe is inclined upward along the lower end of the supporting bend.

[0018] Optionally, each of the four ends of the cross-shaped air distribution tube is connected to a suction device, and each suction device is connected upward to two suspension cylinders through the air dispersing device. The eight suspension cylinders connected by the cross-shaped air distribution tube are at the same horizontal height, and there are gaps between adjacent suspension cylinders.

[0019] Optionally, the diameter of the third through hole is larger than the diameter of the fourth through hole;

[0020] The diameter of the cross-shaped air distribution tube is the same as the diameter of the air inlet tube and the suction straight tube.

[0021] Optionally, the distance between the two ends of the supporting bends symmetrically arranged in the cross-shaped air distribution pipe is much greater than the distance between the suspension cylinders connected to its top;

[0022] The cross-shaped air tube can also be used to attach markers.

[0023] Optionally, the support bend is bent outward at 90°, and the bottom of the support bend is directly used to contact the bottom silt, and the end straight pipe is inclined upward at 10°-20°.

[0024] The present invention achieves the following technical advantages over the prior art:

[0025] The suction-suspension diffused aeration device proposed in this utility model, through the setting of air distribution suction and suspension cylinder, has a good effect on restoring biological activity and enriching microorganisms in the sedimented sludge. Through continuous air supply and oxygenation and sludge suction and mixing, the sedimented sludge can be reintroduced into the device, increasing the volume of sewage aeration treatment. It has a good treatment effect, especially on large, low-pollution natural water bodies, and can quickly establish a stable ecological structure, restore and improve the self-purification capacity of the water body.

[0026] The suction-suspension diffused aeration device proposed in this utility model has a simple structure, does not require a large number of bottom pipes, and is easy to move and recycle with the addition of binding markers. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a front cross-sectional view of the suction-suspension diffused aeration device of this utility model.

[0029] Figure 2This is a top view of the suction-suspension diffuser aeration device of this utility model.

[0030] Figure 3 This is a schematic diagram of the operation of the suction-suspension diffuser aeration device of this utility model.

[0031] Figure 4 This is a top view of the aeration device of the suction-suspension diffuser aeration device of this utility model.

[0032] Figure 5 This is a side view of the aeration device of the suction-suspension diffuser aeration device of this utility model.

[0033] Figure 6 This is a schematic diagram of the suspension cylinder structure of the suction-suspension diffuser aeration device of this utility model.

[0034] Figure 7 This is a top view of the suspension cylinder of the suction-suspension diffuser aeration device of this utility model.

[0035] Figure 8 This is a radial cross-sectional view of a partition in the suspension cylinder of the suction-suspension diffuser aeration device of this utility model.

[0036] Figure 9 This is a radial cross-sectional view of another partition of the suspension cylinder of the suction-suspension diffuser aeration device of this utility model.

[0037] Figure 10 This is a bottom view of the suspension cylinder of the suction-suspension diffuser aeration device of this utility model.

[0038] In the figure, the attached figures are labeled as follows:

[0039] 1. Air distribution device; 2. Suction device; 3. Suspension cylinder; 4. Air dispersion device; 5. Cross-shaped air distribution pipe; 6. Air inlet pipe; 7. Right-angle pipe; 8. Suction straight pipe; 9. Support bend pipe; 10. First through hole; 11. End straight pipe; 12. Horn-shaped bend pipe; 13. Horizontal pipe; 14. Fourth through hole; 15. Second through hole; 16. Third through hole; 17. Packing; 18. Baffle plate. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] The purpose of this invention is to provide a suction-suspension diffused aeration device to solve the problems of high cost and difficulty in moving the equipment when treating large areas of heavily polluted water. This invention not only improves the sewage treatment capacity, but also allows for easy movement and greater flexibility.

[0042] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Example

[0043] like Figure 1 and 2 As shown, this embodiment provides a suction-suspension diffused aeration device, including an air distribution device 1 and a suction device 2. The air distribution device 1 distributes gas into the suction device 2, and the suction device 2 sucks in the bottom sludge of a large area of ​​heavily polluted water to be treated and mixes it. The top of the suction device 2 is connected to a suspension cylinder 3. The packing material 17 in the suspension cylinder 3 can quickly enrich microorganisms and form a biofilm under the action of airflow and sludge-water mixture, thereby treating the sewage.

[0044] In this embodiment, all pipelines involved in the suction-suspension diffused aeration device are made of stainless steel. The air distribution device 1 includes a cross-shaped air distribution pipe 5 and an air inlet pipe 6 located in the middle of the cross-shaped air distribution pipe 5. The cross-shaped air distribution pipe 5 is internally interconnected, equivalent to a four-way pipe. An air inlet hole is opened in the middle of the cross-shaped air distribution pipe 5, which is connected to the air inlet pipe 6. The cross-shaped air distribution pipes 5 are arranged in parallel, and the air inlet pipe 6 is arranged perpendicular to the cross-shaped air distribution pipes 5. The air inlet pipe 6 is connected to an external air generation device through other pipelines. In this embodiment, the air inlet pipe 6 is higher than the suspension cylinder 3 to prevent mutual interference. Moreover, the cross-shaped air distribution pipe 5 can also be used to tie markers. After the aeration device is placed at the bottom of the polluted water body, its position can be identified by the marker outside the water body, which facilitates adjustment, maintenance and final recovery during operation.

[0045] like Figure 2 As shown, in this embodiment, right-angle tubes 7 are connected to the lower sides of the four ends of the cross-shaped air distribution tube 5. The right-angle tubes 7 extend outward along the cross-shaped air distribution tube 5. Currently, there is only the cross-shaped air distribution tube 5 on the horizontal plane. A suction device 2 is installed on the periphery of the cross-shaped air distribution tube 5. The cross-shaped air distribution tube 5 has four air distribution ports and four sets of suction devices 2 are installed in the four directions.

[0046] like Figure 1As shown, specifically, in this embodiment, the suction device 2 is connected to the air outlet of the right-angle tube 7 to support the air distribution device 1. The suction devices 2 in four directions support the central cross air distribution tube 5, forming a stable structure when placed at the bottom of the water body. The suction device 2 includes a suction straight pipe 8, a support bend pipe 9, and an end straight pipe 11 connected in sequence. The suction straight pipe 8 is vertically arranged on the outer side of the cross-shaped air distribution pipe 5, and the lower side wall of the suction straight pipe 8 is connected to the right-angle pipe 7. This makes the center of gravity of the cross-shaped air distribution pipe 5 lower and more stable. Moreover, the suction straight pipe 8 directly receives the gas from the cross-shaped air distribution pipe 5 to form a negative pressure to suck up the sludge. The support bend pipe 9 has a plurality of first through holes 10 evenly opened on one side of the air distribution device 1. The first through holes 10 are used to suck up the bottom sludge. In this embodiment, the support bend pipe 9 is bent inward at 90°, and the bottom of the support bend pipe 9 is directly used to contact the bottom sludge. The number of openings of the first through holes 10 is determined by the length of the support bend pipe 9. The end straight pipe 11 is arranged to extend outward along the support bend pipe 9. Since the end straight pipe 11 is used to suck up the surrounding sludge, the end straight pipe 11 is tilted upward at 15° to facilitate the absorption of the surrounding sludge from a greater distance.

[0047] like Figure 1 and 3 As shown, in this embodiment, the cross-shaped air distribution pipe 5 and the suction device 2 form a stable four-corner support device, used to absorb sludge from the bottom and surrounding areas. The diameter of the cross-shaped air distribution pipe 5 is the same as that of the suction straight pipe 8, but they are connected in the middle by a right-angle pipe 7. The ratio of the diameter of the right-angle pipe 7 to the diameter of the supporting bend pipe 9 is 1:2 to 1:3. In this embodiment, the diameter of the right-angle pipe 7 is φ20. The diameter of the cross-shaped air distribution pipe 5 is the same as that of the air inlet pipe 6 and the suction straight pipe 8, both being φ50, while the minimum diameter of the right-angle pipe 7 is φ20. Negative pressure suction is achieved by controlling the flow rate and pressure of the air inlet pipe 6. After the gas enters the cross-shaped air distribution pipe 5 from the air inlet pipe 6, it is distributed along the four-way pipeline. When the gas passes through the right-angle pipe 7 from the cross-shaped air distribution pipe 5, the flow rate increases and the pressure decreases, and then it flows directly... Entering the bottom of the suction straight pipe 8, the right-angle pipe 7, with its small diameter, enters from the bottom side wall of the suction straight pipe 8. According to Bernoulli's principle, the greater the local velocity, the lower the pressure. At this time, the high-speed gas enters the liquid-filled suction straight pipe 8, forming a local low pressure. Then, the gas-liquid mixture continues to rise, resulting in the gas-liquid mixture density being less than the external static water density, forming a dynamic lifting force. Moreover, when the gas-liquid mixture is discharged, the flow velocity is high, and the local pressure is lower than the external static water pressure, forming a low-pressure zone. This further achieves bottom negative pressure suction, thereby enabling the end straight pipe 11 to suction the surrounding sludge. In this embodiment, the diameter of the first through hole 10 is φ15. The support bend 9 suctions the bottom sludge below the cross-shaped gas distribution pipe 5 through the first through hole 10. The suction device 2 realizes the suction and mixing of the bottom and surrounding sludge.

[0048] In this embodiment, the suspension cylinder 3 is used to receive the mud-water mixture from the suction device 2 to form a biofilm. The suction device 2 is connected to the suspension cylinder 3 via the aeration device 4. Figure 1 , 4 As shown in Figure 5, the aeration device 4 in this embodiment includes a bull-horn-shaped bend 12 and a horizontal pipe 13 disposed at the top of the bull-horn-shaped bend 12. The bull-horn-shaped bend 12 is a straight pipe with two bends extending outward from each end. The straight pipe part of the bull-horn-shaped bend 12 is vertically connected to the top of the suction straight pipe 8, and the bend part of the bull-horn-shaped bend 12 extends into the suspension cylinder 3. The diameter of the straight pipe and the bend of the bull-horn-shaped bend 12 is the same as the diameter of the suction straight pipe 8. The water outlet at the top of the suction straight pipe 8 is vertically connected to the middle of the straight pipe of the bull-horn-shaped bend 12. At this time, the straight pipe of the bull-horn-shaped bend 12 is horizontally set, and the bend of the bull-horn-shaped bend 12 extends horizontally outward, facing away from the cross-shaped aeration pipe 5. This arrangement is because the bends of the two bull-horn-shaped bends 12 need to be connected to the suspension cylinder 3 respectively, so that the two suspension cylinders 3 will not interfere with each other, and an additional suspension cylinder 3 can be added.

[0049] In this embodiment, the top of the bend of the horn-shaped bend 12 is vertically connected to the horizontal pipe 13. The horizontal pipe 13 is located inside the suspension cylinder 3. A row of fourth through holes 14 is opened on both sides of the top of the horizontal pipe 13 at a radial angle of 45°. The diameter of the fourth through holes 14 is φ5. The gas-liquid-sludge mixture drawn from the straight pipe 8 enters the horizontal pipe 13 through the horn-shaped bend 12. The horizontal pipe 13 sprays the gas-liquid-sludge mixture into the suspension cylinder 3 through the fourth through holes 14. The horizontal pipe 13 is horizontally arranged, so that there are more openings of the fourth through holes 14 and the spray area is larger, which is more conducive to the enrichment of microorganisms in the suspension cylinder 3.

[0050] like Figure 6-10 As shown, the bottom of the suspension cylinder 3 in this embodiment has multiple second through holes 15. The second through holes 15 are used to draw in the mud-water mixture and to discharge heavier biofilm fragments that have detached from the packing material 17. After long-term aeration operation, the second through holes 15 will draw in the gas-liquid-solid three-phase mixture; as shown Figure 6 and 10 As shown, the bottom connecting port of the suspension cylinder 3 is used for the bend of the horn-shaped bend 12 to extend and connect. Therefore, multiple second through holes 15 are distributed circumferentially along the connecting port at the bottom of the suspension cylinder 3. The diameter of the second through holes 15 is φ15. When the fourth through hole 14 is sprayed into the suspension cylinder 3 to form a local negative pressure, the second through holes 15 at the bottom of the suspension cylinder 3 can draw in the nearby mud-water mixture and mix it in the suspension cylinder 3 for the enrichment of microorganisms.

[0051] like Figure 6 and 7As shown, the top of the suspension cylinder 3 in this embodiment is provided with a plurality of third through holes 16. The plurality of third through holes 16 are distributed circumferentially along the center of the top of the suspension cylinder 3. The diameter of the third through hole 16 is φ10. The third through hole 16 is used to discharge the gas-liquid-solid three-phase mixture and to complete the aeration of the water body, thereby increasing the oxygen content of the polluted water body. The gas-liquid-solid three-phase mixture discharged by the third through hole 16 in this embodiment includes air that has not been fully utilized by the biofilm, sludge that has not adhered to the packing material 17 and lighter biofilm fragments that have fallen off the packing material 17, as well as sewage that has been drawn in and flows upward with the air bubbles.

[0052] like Figure 1 As shown, the suspension cylinder 3 is filled with packing material 17. The packing material 17 does not need to completely fill the suspension cylinder 3. In this way, the packing material 17 inside the suspension cylinder 3 will block the flow of the internal mixture, which is not conducive to aeration. When the gas-liquid mud-water mixture is sprayed in the fourth through hole 14, the packing material 17 can be flushed up, so that the packing material 17 can contact the gas-liquid mud-water mixture with a larger area, complete the enrichment of microorganisms, and form a biofilm.

[0053] like Figure 1 , 6 As shown in Figures 8-9, multiple transverse baffles 18 are installed vertically and horizontally inside the suspension cylinder 3, with adjacent baffles 18 staggered and inclined. Packing material 17 is distributed on the upper and lower sides of the baffles 18 inside the suspension cylinder 3 to prevent packing material 17 from accumulating and reducing the contact area. In this embodiment, three baffles 18 are provided, staggered from top to bottom, and each baffle 18 extends horizontally through the suspension cylinder 3. The baffles 18 inside the suspension cylinder 3 are inclined in the horizontal direction. This allows the bubbles and gas-liquid-slurry mixture injected through the fourth through hole 14 to be continuously reflected, splashed, broken, and segmented by the baffles 18. The broken and segmented bubbles form a negative pressure inside the suspension cylinder 3 as they continue to rise, facilitating the suction of the slurry mixture through the second through hole 15. The mixture of sludge and liquid, sprayed through the fourth through hole 14 of the horizontal pipe 13 and reflected by the baffle 18, is constantly mixed. During the rising and falling process due to gravity, the microorganisms in the mixture can easily attach to the packing material 17 distributed in the suspension cylinder 3 and grow into a biofilm. In the frequent mixing and collision, due to the biological adhesion and adsorption, netting, bridging and other effects, a high-concentration and highly active suspended biological sludge with the packing material 17 as the skeleton will be formed in the suspension cylinder 3. During the rising process, the bubbles are broken by the baffle 18 for oxygen dissolution. In addition, the upper and lower layers of the packing material 17 are separated by the baffle 18, which will result in different oxygen concentrations in contact with the biofilm and the suspended sludge, so that the whole device has the treatment effects of anaerobic, aerobic and facultative anaerobic.

[0054] Finally, the aeration device is connected to a suction device 2 at each of the four ends of the cross-shaped air distribution pipe 5. Each suction device 2 is connected to two suspension cylinders 3 at the top through the air dispersing device 4. The eight suspension cylinders 3 connected by the cross-shaped air distribution pipe 5 are at the same horizontal height, and there are gaps between adjacent suspension cylinders 3. Moreover, the distance between the two ends of the symmetrically arranged support bends 9 of the cross-shaped air distribution pipe 5 is much greater than the distance between the suspension cylinders 3 connected at the top, which facilitates the formation of an overall flow cycle of suction and aeration.

[0055] like Figure 3 As shown, the working process of the suction-suspension diffuser aeration device in this embodiment is as follows:

[0056] A marker is attached to the cross-shaped air distribution pipe 5 of the aeration device, and then it is placed at the bottom of the heavily polluted water body to be treated. Gas is then introduced into the air inlet pipe 6. The gas in the air inlet pipe 6 is distributed along four branches after passing through the cross-shaped air distribution pipe 5. Each branch is connected to the suction device 2 via a right-angle pipe 7. The bottom of the suction straight pipe 8 receives the accelerated gas, creating a local low pressure. After the gas and liquid mix, the density decreases, and bubbles rise, causing the first through-hole 10 of the supporting bend pipe 9 to suck up the sludge at the bottom. The outermost end straight pipe 11 directly sucks up the surrounding sludge. After being sucked up, the sludge mixes with the accelerated gas in the suction straight pipe 8 and rises, forming a gas-liquid-solid three-phase mixture, accompanied by rising bubbles. This mixture enters the suspension cylinder 3 through the fourth through-hole 14 of the horizontal pipe 13. Because the fourth through-hole 14 is smaller, the incoming water flow accelerates, creating a local negative pressure. The incoming bubbles are broken and segmented by the baffle 18, further increasing the negative pressure, causing the second through-hole 15 to suck up the mud-water mixture and the mixture from the fourth through-hole 14. The gas-liquid-sludge mixture is further mixed. During the rising and falling process due to gravity, the microorganisms in the mixture easily attach to the packing material 17 distributed inside the suspension cylinder 3 and grow into a biofilm. In the frequent mixing and collision, due to the biological adhesion and adsorption, netting, bridging and other effects, a high-concentration and highly active suspended biological sludge with the packing material 17 as the skeleton will be formed inside the suspension cylinder 3. During the rising process, the bubbles are broken by the partition 18 to dissolve oxygen. In addition, the upper and lower layers of the packing material 17 are separated by the partition 18, which leads to different oxygen concentrations in contact with the biofilm and the suspended sludge. This gives the whole device the treatment effects of anaerobic, aerobic and facultative anaerobic. Finally, the undissolved small bubbles and the sludge-water mixture are discharged from the suspension cylinder 3 through the third through hole 16 to achieve aeration and increase the oxygen content of the polluted water. Finally, a high-concentration and highly active suspended biological sludge is formed in the suspension cylinder 3 with the biofilm as the center. Different biochemical reactions are produced according to the different oxygen concentrations in contact, thus treating the sewage.

[0057] The suction-suspension diffused aeration device of this embodiment has a good effect on restoring biological activity and enriching microorganisms in sedimented sludge. Through continuous air supply and oxygenation and sludge suction and mixing, sedimented sludge can be reintroduced into the treatment system, increasing the volume of sewage aeration treatment. It has a good treatment effect, especially on large, low-pollution natural water bodies. It can quickly establish a stable ecological structure, restore and improve the self-purification capacity of water bodies. The structure is simple and easy to move and recycle.

[0058] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A suction-suspension diffused aeration device, characterized in that, include: An air distribution device includes a cross-shaped air distribution pipe and an air inlet pipe disposed in the middle of the cross-shaped air distribution pipe. The cross-shaped air distribution pipe is internally connected, and the air inlet pipe is connected to the middle of the cross-shaped air distribution pipe. Right-angle pipes are connected to the lower sides of the four ends of the cross-shaped air distribution pipe, and the right-angle pipes extend outward along the cross-shaped air distribution pipe. A suction device, connected to the air outlet of the right-angle tube, is used to support the air distribution device. The suction device includes a suction straight tube, a support bend tube, and an end straight tube connected in sequence. The suction straight tube is vertically arranged on the outer side of the cross-shaped air distribution tube, and the lower sidewall of the suction straight tube is connected to the right-angle tube. It is used to form a negative pressure to suction sludge by receiving gas from the cross-shaped air distribution tube. The ratio of the diameter of the right-angle tube to the diameter of the support bend tube is 1:2 to 1:

3. The support bend tube has a plurality of first through holes evenly opened along one side of the air distribution device. The first through holes are used to suction the bottom sludge. The end straight tube extends outward along the support bend tube and is used to suction the surrounding sludge. A suspension cylinder is used to receive a mud-water mixture from a suction device to form a biofilm. The bottom of the suspension cylinder has multiple second through holes for suctioning the mud-water mixture, and the top of the suspension cylinder has multiple third through holes for venting the liquid-solid three-phase mixture. The suspension cylinder is filled with packing material.

2. The suction-suspension diffused aeration device according to claim 1, characterized in that, It also includes a gas dispersion device, which includes a bullhorn-shaped bend and a horizontal pipe disposed at the top of the bullhorn-shaped bend. The bullhorn-shaped bend is a straight pipe in the middle with a bend extending outward at both ends. The straight pipe part of the bullhorn-shaped bend is vertically connected to the top of the suction straight pipe, and the bend part of the bullhorn-shaped bend extends into the suspension cylinder.

3. The suction-suspension diffused aeration device according to claim 2, characterized in that, The top of the bend of the horn-shaped bend is vertically connected to the horizontal pipe, and a row of fourth through holes is opened on both sides of the top of the horizontal pipe at a radial angle of 45° upward.

4. The suction-suspension diffused aeration device according to claim 3, characterized in that, Multiple transverse baffles are installed vertically and horizontally inside the suspension cylinder, and two adjacent baffles are staggered and inclined. The filler is distributed on the upper and lower sides of the baffles inside the suspension cylinder.

5. The suction-suspension diffused aeration device according to claim 4, characterized in that, The plurality of the third through holes are distributed circumferentially along the center of the top of the suspension cylinder; Multiple second through holes are circumferentially distributed along the communication port at the bottom of the suspension cylinder, and the communication port at the bottom of the suspension cylinder is used for the bend of the horn-shaped bend to extend and communicate.

6. The suction-suspension diffused aeration device according to claim 5, characterized in that, The diameter of the first through hole of the supporting bend is the same as the diameter of the second through hole and is larger than that of the third through hole; The end straight pipe is inclined upward along the lower end of the supporting bend.

7. The suction-suspension diffused aeration device according to claim 2, characterized in that, The four ends of the cross-shaped air distribution tube are connected to a suction device, and each suction device is connected upward to two suspension cylinders through the air dispersing device. The eight suspension cylinders connected by the cross-shaped air distribution tube are at the same horizontal height, and there are gaps between adjacent suspension cylinders.

8. The suction-suspension diffused aeration device according to claim 3, characterized in that, The diameter of the third through hole is larger than the diameter of the fourth through hole; The diameter of the cross-shaped air distribution tube is the same as the diameter of the air inlet tube and the suction straight tube.

9. The suction-suspension diffused aeration device according to claim 1, characterized in that, The distance between the two ends of the supporting bend, which is symmetrically arranged in the cross-shaped air distribution pipe, is much greater than the distance between the suspension cylinders connected to its top. The cross-shaped air tube can also be used to attach markers.

10. The suction-suspension diffused aeration device according to claim 1, characterized in that, The supporting bend is bent outward at 90°, and the bottom of the supporting bend is directly used to contact the bottom silt. The end straight pipe is inclined upward at 10°-20°.

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