A combined wastewater treatment device and method with stratified aeration

Abstract

This invention discloses a combined wastewater treatment device and method with stratified aeration, relating to the field of wastewater treatment technology. By having a first aeration mechanism and a second aeration mechanism respectively positioned on opposite sides of the bottom of the aeration tank, and utilizing a lifting mechanism for dynamic adjustment, oxygen can be delivered to different water layers at the bottom, middle, and top of the tank. This satisfies the oxygen requirements of aerobic microorganisms at different heights, avoiding the problems of oxygen excess at the top and oxygen deficiency at the bottom caused by traditional uniform aeration, thus improving wastewater treatment efficiency. Through the lifting mechanism design, the suspended cylinder achieves automatic levitation via air bladders. Combined with real-time position monitoring by distance sensors, the controller adjusts the air supply of the blower according to the distance gradient from the top of the tank, reducing ineffective aeration energy consumption. This achieves the dual effect of providing sufficient oxygen at different water layers while saving energy consumption. Furthermore, the lifting mechanism is driven by pneumatics, eliminating the need for an additional motor, reducing equipment complexity and maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a combined wastewater treatment device and method with stratified aeration. Background Technology

[0002] Wastewater treatment is crucial for ensuring the sustainable use of water resources. With limited freshwater resources on Earth, wastewater treatment enables the recycling of water, alleviates water shortages, reduces over-exploitation of natural water sources, and guarantees a stable supply of water for industry, agriculture, and residential use.

[0003] Aeration plays a crucial role in wastewater treatment and is a core element in ensuring treatment effectiveness. By forcibly introducing air into the wastewater, it significantly increases the dissolved oxygen concentration, providing essential oxygen for aerobic microorganisms and thus efficiently decomposing organic matter in the wastewater. Referring to the wastewater treatment aeration device disclosed in patent application CN111423056A, the wastewater in the aeration tank circulates, and the water flow pushed upwards by the blades through the large through-holes forms a cross-impact effect through the branch pipes, resulting in better aeration and higher efficiency, achieving sufficient aeration. Referring to the wastewater treatment aeration device disclosed in patent application CN118405782A, by setting a locking plate, the load-bearing support component can be limited and fixed, allowing it to be stably installed on the top of the wastewater treatment tank. The combination of the load-bearing support component and the locking plate allows for the limitation and fixing of the adjustable component, while also enabling adjustment of its position on the wastewater treatment tank, thereby increasing the flexibility of the adjustable component.

[0004] The above-mentioned sewage treatment aeration devices in actual use have the following defects: (1) Since the bottom of the aeration tank is the main sedimentation area of ​​activated sludge, the microbial density is high and the metabolic activity is vigorous, resulting in the maximum oxygen demand. As the concentration of organic matter decreases from the bottom of the tank to the top of the tank, the metabolic demand of microorganisms decreases, which gradually reduces the oxygen demand in the tank and at the top of the tank. However, some aeration tanks currently use a uniform oxygen supply method, which uniformly transports air to the bottom, middle and top of the aeration tank, resulting in excessive oxygen supply in the middle and top of the tank and energy waste; for example, the sewage treatment aeration device disclosed in patent application CN118405782A cannot flexibly adjust the air supply according to the oxygen demand at different heights of the aeration tank, resulting in the same amount of air being transported to different water layers, thus wasting air and increasing the energy consumption of the air supply equipment; (2) Since most of the aeration heads in the aeration tank are installed at the bottom of the tank, although they can ensure sufficient dissolved oxygen at the bottom of the aeration tank, the oxygen gradually dissolves and is consumed during the rising of the bubbles, which easily leads to insufficient dissolved oxygen concentration at locations far from the bottom of the tank, thus failing to ensure the activity of microorganisms in the tank and easily causing the problem that organic matter in the sewage cannot be fully decomposed. For example, the wastewater treatment aeration device disclosed in patent application CN118405782A has multiple aeration heads set at the bottom of the aeration tank. Although it can provide sufficient dissolved oxygen for microorganisms at the bottom of the aeration tank, it cannot guarantee the dissolved oxygen concentration at locations far from the bottom of the tank, which can easily lead to the problem that organic matter in the aeration tank cannot be fully decomposed.

[0005] Therefore, this invention proposes a combined wastewater treatment device and method with layered aeration to solve the above problems. Summary of the Invention

[0006] Purpose of the Invention: To solve the above-mentioned technical problems, this invention provides a combined wastewater treatment device and method with layered aeration. It addresses the current problem that the bottom of the aeration tank, being the main sedimentation zone for activated sludge, has a high density of microorganisms, active metabolism, and the highest oxygen demand. As the concentration of organic matter gradually decreases from the middle to the top of the tank, the metabolic activity and oxygen demand of microorganisms also decrease. Currently, some aeration tanks still use uniform oxygen supply, i.e., simultaneous air supply to the bottom, middle, and top of the tank, resulting in excessive oxygen supply in the middle and top, leading to energy waste. Furthermore, while the aeration heads are mostly located at the bottom of the tank, ensuring sufficient dissolved oxygen, the oxygen dissolves and is consumed as the bubbles rise, resulting in insufficient dissolved oxygen concentration in the middle of the tank, affecting microbial activity, and consequently making it difficult to fully decompose organic matter in the wastewater.

[0007] Technical solution: The present invention provides a combined wastewater treatment device with layered aeration, comprising an aeration tank and inlet and outlet pipes fixedly installed on both sides of the outer wall of the aeration tank, and further comprising:

[0008] The first and second aeration mechanisms are respectively located on the bottom sides of the inner cavity of the aeration tank, and are used to transport air to sewage at different water levels to increase the dissolved oxygen concentration at each water level and provide the necessary oxygen for aerobic microorganisms.

[0009] The first aeration mechanism includes a support component. The support component is equipped with a lifting mechanism that automatically floats up or down using externally input air power. During the floating process, different amounts of air are delivered to the bottom area, middle area and top area of ​​the aeration tank according to the distance from the top of the tank. Multiple aeration generating components are also evenly arranged on the outer wall of the lifting mechanism. The aeration generating components automatically swing during the floating process, increasing the aeration area and agitating the sewage at the same time.

[0010] The blower is fixedly installed on the side wall of the aeration tank and controlled by a controller. The output end of the blower is connected to the first aeration mechanism and the second aeration mechanism through pipes, and is used to simultaneously supply oxygen-enriched air to the first aeration mechanism and the second aeration mechanism.

[0011] Furthermore, the first aeration mechanism and the second aeration mechanism have the same structure. The supporting component includes a supporting cylinder detachably disposed at the bottom of the inner cavity of the aeration tank and a cylinder cover fixedly disposed at the top of the supporting cylinder. An air supply pipe is fixedly disposed at the top of the cylinder cover. One end of the air supply pipe passes through the cylinder cover and is fixedly disposed with a third air supply hose. A guide rod is fixedly disposed at the bottom of the inner cavity of the supporting cylinder. The lifting mechanism slides up or down along the outer wall of the guide rod. The outer wall of the supporting cylinder is also evenly provided with lifting clearance slots corresponding to the positions of multiple aeration generating components. Multiple aeration generating components are slidably disposed in the lifting clearance slots at their corresponding positions. A swing drive component is provided on the inner wall of the lifting clearance slot for driving the aeration generating component at that position to swing back and forth.

[0012] Furthermore, the swing drive assembly includes a first vertical plate and a second vertical plate fixedly disposed on both sides of the inner wall of the lifting and avoiding passage. Multiple first arc-shaped protrusions and second arc-shaped protrusions are fixedly disposed on the opposite side walls of the first vertical plate and the second vertical plate, and the multiple first arc-shaped protrusions and second arc-shaped protrusions are arranged alternately.

[0013] Furthermore, the lifting mechanism includes a suspension cylinder and multiple mounting holes evenly opened on the side wall of the suspension cylinder. Annular grooves are provided on both the upper and lower sides of the outer wall of the suspension cylinder. An airbag is fixedly installed in each annular groove. The buoyancy generated by the inflation of two airbags allows the lifting mechanism to float entirely in the sewage. Multiple lifting drive components are evenly arranged at the bottom of the suspension cylinder. Below the lifting drive components and located at the bottom of the bearing cylinder, a touch control component is provided that simultaneously triggers multiple lifting drive components to change the direction of thrust. A connecting ring is provided at the top of the multiple touch control components. A distance sensor is fixedly installed on one side of the top of the suspension cylinder.

[0014] The touch component includes an annular seat fixedly installed at the bottom of the inner cavity of the bearing cylinder, and a plurality of support columns that are uniformly fixedly installed on the top of the annular seat and correspond one-to-one with the positions of the lifting drive component.

[0015] Furthermore, the lifting drive assembly includes a power conversion cylinder and a protective cover fixedly installed at the bottom of the power conversion cylinder. An impeller is rotatably installed inside the power conversion cylinder via a rotating shaft. The rotating shaft rotatably passes through the power conversion cylinder and extends into the interior of the protective cover. A first propeller is fixedly sleeved on the outer wall of the rotating shaft and located inside the protective cover. A mounting base is fixedly installed on one side of the power conversion cylinder and located at the bottom of the suspension cylinder. A gas flow direction control assembly for controlling the airflow output direction is provided between the mounting base and the power conversion cylinder. A first magnet is fixedly installed at both the top and bottom of the mounting base.

[0016] Furthermore, the gas flow control component includes a connecting pipe fixedly installed on the opposite sidewalls of the power conversion cylinder and the mounting base. A housing is fixedly installed inside the connecting pipe, and the housing divides the connecting pipe into a first air passage and a second air passage. A partition is fixedly installed inside the housing, and the partition divides the internal space of the housing into an upper air chamber and a lower air chamber. A first exhaust hole and a second exhaust hole are respectively opened on both sides of the outer wall of the housing. The first exhaust hole is connected to the upper air chamber and the second air passage, and the second exhaust hole is connected to the lower air chamber and the first air passage. A vertical pipe is fixedly installed on the sidewall of the housing, and an upper through hole and a lower through hole connected to the upper air chamber and the lower air chamber are respectively opened on the upper and lower positions of the sidewall of the vertical pipe.

[0017] Furthermore, a first jet pipe and a second jet pipe are fixedly installed on both sides of the outer wall of the connecting pipe to connect the power conversion cylinder and the first air passage and the second air passage. An air cylinder is also sealed and slidably installed inside the vertical pipe. The air cylinder is connected to the suspension cylinder through a pipe. An exhaust port is opened on the side wall of the air cylinder near the box. When the air cylinder moves down or up to the limit position, the exhaust port will connect with the upper through hole and the lower through hole respectively. An upper push rod and a lower push rod are fixedly installed at the top and bottom of the connecting pipe respectively. An upper push rod and a second magnet are fixedly sleeved on the outer wall of the upper push rod and the lower push rod. The upper push rod and the lower push rod slide through the mounting base and extend to the outside.

[0018] Furthermore, the aeration generating component includes a first support pipe and a second support pipe disposed on one side of the first support pipe. The first support pipe and the second support pipe are connected by a second air supply hose. A plurality of aeration head assemblies are uniformly fixedly disposed on the top of the first support pipe. Rotating blocks are fixedly disposed on the top and bottom of the outer wall of the first support pipe. Swing arms are fixedly disposed on both sides of the outer wall of the rotating blocks. Swing arm sleeves are fixedly disposed on the top and bottom of the second support pipe. The two rotating blocks are rotatably disposed in the swing arm sleeves at corresponding positions.

[0019] Furthermore, the aeration head assembly includes a second propeller rotatably mounted on the top of the aeration head body via a rotating shaft. Multiple scrapers are fixedly mounted on the outer wall of the rotating shaft. The scrapers slide close to the outer wall of the aeration head body. A bubble-cutting chamber is opened inside the scraper, and a blade is fixedly mounted inside the bubble-cutting chamber.

[0020] This invention also discloses a combined wastewater treatment method with stratified aeration, for use in a combined wastewater treatment device with stratified aeration, the method comprising the following steps:

[0021] Step 1: The blower draws in air and introduces it into the first and second aeration units through pipes;

[0022] Step 2: The first aeration mechanism and the second aeration mechanism release air into the sewage in the aeration tank through multiple aeration generating components. While the aeration generating components release air into the sewage, the lifting mechanism uses the input air to propel itself to move upward or reciprocate upward within the bearing component.

[0023] Step 3: As multiple aeration generating components move upward or downward, the carrier cylinder component drives the aeration generating components to swing back and forth in the horizontal direction, releasing air over a larger range and agitating the wastewater.

[0024] Beneficial effects: Compared with the prior art, the combined wastewater treatment device and wastewater treatment method with layered aeration provided by the present invention have the following technical effects and advantages:

[0025] 1. By setting the first and second aeration mechanisms on opposite sides of the bottom of the aeration tank and utilizing a dynamic adjustment mechanism via a lifting system, differentiated oxygen supply is achieved for the bottom, middle, and top areas of the tank. This allows for oxygen delivery to different water layers at these levels, meeting the oxygen requirements of aerobic microorganisms at varying heights. This avoids the problems of oxygen excess at the top and oxygen deficiency at the bottom caused by traditional uniform aeration, achieving on-demand oxygen supply and improving wastewater treatment efficiency. Secondly, the lifting mechanism design allows the suspended cylinder to automatically suspend via air bladders. Combined with real-time position monitoring by distance sensors, the controller adjusts the air supply from the blower based on the distance gradient from the top of the tank. This ensures that the air supply automatically decreases when the lifting mechanism approaches the top and increases when it approaches the bottom, perfectly matching dissolved oxygen demand and reducing ineffective aeration energy consumption. This achieves the dual effect of providing sufficient oxygen at different water layers while saving energy. Furthermore, the lifting mechanism is pneumatically driven, eliminating the need for an additional motor and reducing equipment complexity and maintenance costs.

[0026] 2. During the lifting and lowering process, the aeration generating component drives the swing arm to swing back and forth through the arc-shaped protrusion of the swing drive component, which significantly increases the aeration area. The swing expands the coverage of the aeration head from a fixed point to a fan-shaped area, eliminating the dead corners of traditional aeration. Moreover, the stirring effect generated by the swing promotes full contact between sewage and activated sludge, shortening the treatment cycle.

[0027] 3. A second propeller is installed at the top of the aeration head body, which is driven to rotate by the impact of water flow. The scraper continuously cleans the surface, and the blades cut the air bubbles. This allows the scraper to remove sludge in real time, reducing maintenance frequency. Large air bubbles are cut into micron-sized air bubbles by the blades, which significantly increases the specific surface area and improves the oxygen transfer rate. Secondly, the lifting drive component determines the gas delivery direction of the exhaust port through the inertial collision of the upper and lower push rods. When the lifting mechanism rises to the limit position, it can automatically move down. The gas flow control component can switch the impeller rotation direction, so that the aeration unit is always in the circulation aeration treatment operation of different water layers. Moreover, the lifting and switching is fully automatic, the structure is simple, the equipment has a long service life, and even if the sewage concentration fluctuates, it can still maintain stable lifting and lowering by adjusting the air supply.

[0028] 4. By adopting the same structural design for the first and second aeration mechanisms and the detachable design of the load-bearing components, the number of aeration mechanisms can be increased or decreased according to the sewage treatment volume requirements. This allows for flexible adjustment of the number of aeration mechanisms based on the sewage treatment volume, greatly expanding the scope of application. Furthermore, the first and second aeration mechanisms can be quickly disassembled and replaced even if damaged, shortening downtime and significantly improving sewage treatment efficiency. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the first overall three-dimensional structure of the combined wastewater treatment device with layered aeration according to the present invention.

[0030] Figure 2 This is a schematic diagram of the second integral three-dimensional structure of the combined wastewater treatment device with layered aeration according to the present invention;

[0031] Figure 3 This is a schematic diagram of the deaeration tank structure of the combined wastewater treatment device with layered aeration according to the present invention.

[0032] Figure 4 This is a schematic diagram of the first aeration mechanism in the exploded state of the combined wastewater treatment device with layered aeration according to the present invention.

[0033] Figure 5 This is a cross-sectional schematic diagram of the first aeration mechanism of the combined wastewater treatment device with layered aeration according to the present invention.

[0034] Figure 6 For the present invention Figure 5 A magnified structural diagram of part A in the diagram;

[0035] Figure 7 This is a schematic diagram of the assembly state of the aeration generating component and lifting mechanism of the combined wastewater treatment device with layered aeration according to the present invention.

[0036] Figure 8 For the present invention Figure 7 A magnified structural diagram of part B in the diagram;

[0037] Figure 9 This is a schematic diagram of the lifting mechanism of the combined wastewater treatment device with layered aeration according to the present invention in its first state.

[0038] Figure 10 This is a schematic diagram of the second state structure of the lifting mechanism of the combined wastewater treatment device with layered aeration according to the present invention.

[0039] Figure 11 This is a cross-sectional structural schematic diagram of the lifting mechanism of the combined wastewater treatment device with layered aeration according to the present invention.

[0040] Figure 12 For the present invention Figure 11 A magnified structural diagram of part C in the diagram;

[0041] Figure 13 This is a first cross-sectional view of the lifting drive assembly of the combined wastewater treatment device with layered aeration according to the present invention.

[0042] Figure 14 This is a second cross-sectional view of the lifting drive assembly of the combined wastewater treatment device with layered aeration according to the present invention.

[0043] Figure 15 For the present invention Figure 14 A magnified structural diagram of part D in the diagram;

[0044] Figure 16 This is a schematic diagram of the assembled structure of the box and air cylinder of the combined wastewater treatment device with layered aeration according to the present invention.

[0045] Figure 17 This is a third cross-sectional view of the lifting drive assembly of the combined wastewater treatment device with layered aeration according to the present invention.

[0046] Figure 18 This is a schematic diagram of the aeration generating component of the combined wastewater treatment device with layered aeration according to the present invention.

[0047] Figure 19 For the present invention Figure 18 A magnified structural diagram of part E in the diagram;

[0048] Figure 20 For the present invention Figure 18 A magnified structural diagram of part F in the diagram. Detailed Implementation

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. In the drawings: 1. Aeration tank; 2. First aeration mechanism; 21. Supporting cylinder; 22. Cylinder cover; 23. Air supply pipe; 24. Guide rod; 25. Lifting mechanism; 251. Suspension cylinder; 252. Mounting hole; 253. Airbag; 254. Lifting drive assembly; 2541. Power conversion cylinder; 2542. Protective cover; 2543. Impeller; 2544. First propeller; 2545. Mounting base; 2546. First magnet; a1. Connecting pipe; a2. Box body; a3. Partition plate; a4. First exhaust hole; a5. Second exhaust hole; a6. Vertical pipe; a7. Upper through hole; a8. Lower through hole; a9. First jet pipe; a10. Second jet pipe; a11. Air cylinder; a12. Exhaust port. a13, Upper push rod; a14, Lower push rod; a15, Second magnet; 255, Touch control assembly; 2551, Ring seat; 2552, Support column; 256, Connecting ring; 257, Distance sensor; 26, Aeration generating assembly; 261, First support pipe; 262, Second support pipe; 263, Aeration head assembly; 2631, Aeration head body; 2632, Second propeller; 2633, Scraper; 2634, Blade; 264, Rotating block; 265, Swing arm; 266, Swing arm sleeve; 267, Second air supply hose; 27, Lifting and clearance passage; 28, Swing drive assembly; 281, First vertical plate; 282, Second vertical plate; 283, First arc-shaped protrusion; 284, Second arc-shaped protrusion; 29, Third air supply hose; 3, Second aeration mechanism; 4, Blower.

[0050] This invention provides four technical solutions: a combined wastewater treatment device with layered aeration, specifically including the following.

[0051] Example 1

[0052] like Figures 1-3 As shown: A combined wastewater treatment device with stratified aeration includes an aeration tank 1 and inlet and outlet pipes fixedly installed on both sides of the outer wall of the aeration tank 1, and further includes:

[0053] The first aeration unit 2 and the second aeration unit 3 are respectively installed on both sides of the bottom of the inner cavity of the aeration tank 1. They are used to transport air to the sewage at different water levels to increase the dissolved oxygen concentration at each water level and provide the necessary oxygen for aerobic microorganisms.

[0054] The first aeration mechanism 2 includes a support component. Inside the support component is a lifting mechanism 25 that automatically floats up or down using externally input air power. During the floating process, different amounts of air are delivered to the bottom area, middle area and top area of ​​the aeration tank 1 according to the distance from the top of the tank. Multiple aeration generating components 26 are also evenly arranged on the outer wall of the lifting mechanism 25. The aeration generating components 26 automatically swing during the floating process, increasing the aeration area and stirring the sewage at the same time.

[0055] The blower 4 is fixedly installed on the side wall of the aeration tank 1 and controlled by a controller. The output end of the blower 4 is connected to the first aeration mechanism 2 and the second aeration mechanism 3 through pipes, and is used to simultaneously deliver oxygen-enriched air to the first aeration mechanism 2 and the second aeration mechanism 3.

[0056] Example 2

[0057] like Figures 4-8 As shown, the difference from Embodiment 1 is that the first aeration mechanism 2 and the second aeration mechanism 3 have the same structure. The supporting component includes a supporting cylinder 21 detachably disposed at the bottom of the inner cavity of the aeration tank 1 and a cylinder cover 22 fixedly disposed at the top of the supporting cylinder 21. An air supply pipe 23 is fixedly disposed at the top of the cylinder cover 22. One end of the air supply pipe 23 passes through the cylinder cover 22 and is fixedly disposed with a third air supply hose 29. A guide rod 24 is fixedly disposed at the bottom of the inner cavity of the supporting cylinder 21. The lifting mechanism 25 slides up or down along the outer wall of the guide rod 24. The outer wall of the supporting cylinder 21 is also evenly provided with lifting clearance slots 27 corresponding to the positions of multiple aeration generating components 26. Multiple aeration generating components 26 are slidably disposed in the lifting clearance slots 27 at the corresponding positions. The inner wall of the lifting clearance slots 27 is provided with a swing drive component 28 for driving the aeration generating component 26 at that position to swing back and forth. The end of the air supply pipe 23 away from the bearing cylinder 21 is connected to the output end of the fan 4, and an air valve for controlling the opening and closing of the pipeline is fixedly installed on the air supply pipe 23. The top end of the third air supply hose 29 is connected to the air supply pipe 23, and the bottom end of the third air supply hose 29 is connected to the cavity of the suspension cylinder 251.

[0058] In this embodiment, the swing drive assembly 28 includes a first vertical plate 281 and a second vertical plate 282 fixedly disposed on both sides of the inner wall of the lifting clearance channel 27. Multiple first-arc protrusions 283 and second-arc protrusions 284 are fixedly disposed on the opposite sidewalls of the first vertical plate 281 and the second vertical plate 282, respectively, and are arranged alternately. When the end of the swing arm 265 on one side slides along the arcuate surface of the second-arc protrusion 284, the end of the swing arm 265 on the other side is located between two adjacent first-arc protrusions 283.

[0059] Example 3

[0060] like Figures 9-17 As shown, the difference from Embodiment 2 is that: the lifting mechanism 25 includes a suspension cylinder 251 and multiple mounting holes 252 evenly opened on the side wall of the suspension cylinder 251. Annular grooves are provided on both the upper and lower sides of the outer wall of the suspension cylinder 251. An airbag 253 is fixedly installed in each annular groove. The buoyancy generated by the two airbags 253 after inflation allows the lifting mechanism 25 to float entirely in the sewage. Multiple lifting drive components 254 are evenly arranged at the bottom of the suspension cylinder 251. Below the lifting drive components 254 and located at the bottom of the bearing cylinder 21, a touch control component 255 is provided to simultaneously trigger multiple lifting drive components 254 to change the direction of thrust. A connecting ring 256 is provided at the top of the multiple touch control components 255. A distance sensor 257 is fixedly installed on one side of the top of the suspension cylinder 251. The second support tube 262 is fixedly installed inside the mounting hole 252. An annular cavity is opened inside the suspension cylinder 251, which is connected to the mounting hole 252. The center position of the suspension cylinder 251 is slidably sleeved on the outer wall of the guide rod 24.

[0061] The touch component 255 includes an annular seat 2551 fixedly disposed at the bottom of the inner cavity of the bearing cylinder 21, and a plurality of support columns 2552 uniformly fixedly disposed on the top of the annular seat 2551, which correspond one-to-one with the positions of the lifting drive component 254.

[0062] In this embodiment, the lifting drive assembly 254 includes a power conversion cylinder 2541 and a protective cover 2542 fixedly disposed at the bottom of the power conversion cylinder 2541. An impeller 2543 is rotatably disposed inside the power conversion cylinder 2541 via a rotating shaft. The rotating shaft rotatably passes through the power conversion cylinder 2541 and extends into the interior of the protective cover 2542. A first propeller 2544 is fixedly sleeved on the outer wall of the rotating shaft and located inside the protective cover 2542. A mounting base 2545 is fixedly disposed on one side of the power conversion cylinder 2541 and located at the bottom of the suspension cylinder 251. A gas flow direction control assembly for controlling the airflow output direction is disposed between the mounting base 2545 and the power conversion cylinder 2541. A first magnet 2546 is fixedly disposed at the top and bottom of the mounting base 2545.

[0063] In this embodiment, the gas flow control component includes a connecting pipe a1 fixedly installed on the opposite sidewalls of the power conversion cylinder 2541 and the mounting base 2545. A housing a2 is fixedly installed inside the connecting pipe a1, and the housing a2 divides the connecting pipe a1 into a first air passage and a second air passage. A partition a3 is fixedly installed inside the housing a2, and the partition a3 divides the internal space of the housing a2 into an upper air chamber and a lower air chamber. A first exhaust hole a4 and a second exhaust hole a5 are respectively opened on both sides of the outer wall of the housing a2. The first exhaust hole a4 is connected to the upper air chamber and the second air passage, and the second exhaust hole a5 is connected to the lower air chamber and the first air passage. A vertical pipe a6 is fixedly installed on the sidewall of the housing a2. An upper through hole a7 and a lower through hole a8 are respectively opened on the upper and lower positions of the sidewall of the vertical pipe a6, which are connected to the upper air chamber and the lower air chamber.

[0064] In this embodiment, a first jet pipe a9 and a second jet pipe a10 are fixedly installed on both sides of the outer wall of the connecting pipe a1 to connect the power conversion cylinder 2541 with the first air passage and the second air passage. An air cylinder a11 is also sealed and slidably installed inside the vertical pipe a6. The air cylinder a11 is connected to the suspension cylinder 251 through a pipe. An exhaust port a12 is opened on the side wall of the air cylinder a11 near the box a2. When the air cylinder a11 moves down or up to the limit position, the exhaust port a12 will connect with the upper through hole a7 and the lower through hole a8 respectively. An upper push rod a13 and a lower push rod a14 are fixedly installed at the top and bottom of the connecting pipe a1 respectively. An upper push rod a13 and a second magnet a15 are fixedly sleeved on the outer wall of the upper push rod a13 and the lower push rod a14 respectively. The upper push rod a13 and the lower push rod a14 slide through the mounting base 2545 and extend to the outside. The top end of the upper push rod a13 slides through the suspension cylinder 251 and extends to the outside. The bottom ends of the lower push rods a14 in the multiple lifting drive components 254 correspond one-to-one with the positions of the multiple touch components 255. The connecting ring 256 is fixedly installed at the top end of the multiple upper push rods a13. A long strip-shaped clearance groove is opened on the side wall of the vertical pipe a6. The pipe that inputs gas into the vertical pipe a6 can move freely through the long strip-shaped clearance groove when the vertical pipe a6 moves up or down.

[0065] Example 4

[0066] like Figures 18-20As shown, the difference from Embodiment 3 is that: the aeration generating component 26 includes a first support pipe 261 and a second support pipe 262 disposed on one side of the first support pipe 261. The first support pipe 261 and the second support pipe 262 are connected by a second air supply hose 267. A plurality of aeration head components 263 are uniformly fixedly disposed on the top of the first support pipe 261. Rotating blocks 264 are fixedly disposed on the top and bottom of the outer wall of the first support pipe 261. Swing arms 265 are fixedly disposed on both sides of the outer wall of the rotating blocks 264. Swing arm sleeves 266 are fixedly disposed on the top and bottom of the second support pipe 262. The two rotating blocks 264 are rotatably disposed in the swing arm sleeves 266 at corresponding positions.

[0067] In this embodiment, the aeration head assembly 263 includes a second propeller 2632 rotatably mounted on top of the aeration head body 2631 via a rotating shaft. Multiple scrapers 2633 are fixedly mounted on the outer wall of the rotating shaft. These scrapers 2633 slide close to the outer wall of the aeration head body 2631. Each scraper 2633 has a bubble-cutting chamber, and a blade 2634 is fixedly mounted inside the bubble-cutting chamber. The area at the top of the aeration head body 2631 opposite the bottom of the second propeller 2632 has no air holes.

[0068] The present invention also provides a combined wastewater treatment method with stratified aeration, for a combined wastewater treatment device with stratified aeration, the method comprising the following steps:

[0069] Step 1: First, the blower 4 draws in air and inputs it into the first aeration unit 2 and the second aeration unit 3 through the pipe;

[0070] Step 2: The first aeration mechanism 2 and the second aeration mechanism 3 release air into the sewage in the aeration tank 1 through multiple aeration generating components 26. While the aeration generating components 26 release air into the sewage, the lifting mechanism 25 uses the input air to propel itself to move upward or reciprocate upward within the bearing component.

[0071] Step 3: While multiple aeration generating components 26 move upward or downward, the carrier cylinder component drives the aeration generating components 26 to swing back and forth in the horizontal direction, releasing air over a larger range and stirring the sewage.

[0072] The specific process is as follows: the blower 4 supplies air to the first aeration mechanism 2 and the second aeration mechanism 3 through the controller. The air is input into the interior of the suspension cylinder 251 through the air supply pipe 23 and the third air supply hose 29. Some of the air is then transported to the second support pipe 262 at the corresponding position through multiple mounting holes 252. Then the air is transported to the first support pipe 261 through the second air supply hose 267 and released into the sewage through the air holes on the surface of multiple aeration head assembly 263.

[0073] Meanwhile, some of the air entering the suspension cylinder 251 enters the air cylinder a11 through a hose. Since the initial state of the air cylinder a11 is that the exhaust port a12 and the upper through hole a7 are opposite each other, and the second magnet a15 on the outer wall of the upper push rod a13 and the first magnet 2546 on the top of the mounting base 2545 are attracted to each other, and the bottom end of the lower push rod a14 abuts against the top of the support column 2552 in the opposite position, after the air enters the upper chamber through the exhaust port a12 and the upper through hole a7, the air then passes through the first exhaust port a4 and the second spray... The air pipe a10 sprays into the power conversion cylinder 2541. Since the second air pipe a10 is located at a certain angle between the air outlet of the power conversion cylinder 2541 and the impeller 2543, the blown air directly acts on the blades of the impeller 2543. The impeller 2543 is driven by the airflow and rotates. The power drives the first propeller 2544 to rotate through the shaft. Since the first propeller 2544 is completely submerged in sewage, the reaction force generated when the first propeller 2544 rotates pushes the lifting mechanism 25 to move upward as a whole.

[0074] As the aeration unit 26 moves upward, one of the swing arms 265 slides along the outer wall of a second arc-shaped protrusion 284 on the side wall of the second vertical plate 282. This swing arm 265 is pushed towards the first vertical plate 281 by the force of the second arc-shaped protrusion 284. At this time, the other swing arm 265 is positioned in the gap between two adjacent first arc-shaped protrusions 283. When the swing arm 265 slides off the outer wall of the second arc-shaped protrusion 284, the other swing arm 265 climbs upward along the bottom of one of the first arc-shaped protrusions 283. This swing arm 265 is then pushed towards the second vertical plate 281 by the first arc-shaped protrusion 283. The aeration head assembly 263 continuously releases air during the oscillating motion of the sliding mechanism in two directions. The distance sensor 257, which is waterproof, detects the distance to the cylinder cover 22 in real time and transmits this distance information to the controller. According to a preset program, as the distance sensor 257 moves closer to the cylinder cover 22, the controller controls the blower 4 to release and transport air in a gradually decreasing gradient. Conversely, as the distance sensor 257 moves away from the cylinder cover 22, the controller controls the blower 4 to release and transport air in a gradually increasing gradient, which corresponds to the gradual decrease in dissolved oxygen demand from the bottom to the top of the aeration tank 1.

[0075] At the same time, when the aeration generating component 26 moves up or down, the second propeller 2632 set on the surface of the aeration head body 2631 rotates due to the impact of sewage. The scraper 2633 scrapes the surface of the aeration head body 2631 when it rotates, and the blade 2634 cuts the bubbles released from the surface of the aeration head body 2631, so that the larger bubbles are divided into multiple smaller bubbles, making the bubbles more dense.

[0076] When the upper push rod a13 moves to its limit position, that is, when the top of the upper push rod a13 abuts against the bottom of the cylinder cover 22, the second magnet a15 on the lower push rod a14 and the first magnet 2546 located at the bottom of the mounting base 2545 attract each other. Due to the inertia of the lifting mechanism 25 moving upward as a whole, at the instant the upper push rod a13 abuts against the cylinder cover 22, the air cylinder a11 is pushed downward by the upper push rod a13. When the air cylinder a11 moves downward to its limit position, the exhaust port a12 and the lower through hole a8 are opposite each other, and the external input... Air enters the lower chamber through the air cylinder a11 and the lower through hole a8. The air then acts on the impeller 2543 through the first jet pipe a9, causing the impeller 2543 to rotate in the opposite direction. After the first propeller 2544 rotates in the opposite direction, it generates downward force. The lifting mechanism 25 moves downward under the combined action of multiple lifting drive components 254 until the bottom end of the lower push rod a14 collides with the support column 2552 at the corresponding position. Then the lifting mechanism 25 moves upward again, and so on.

[0077] It should be noted that, in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

Claims

1. A combined sewage treatment plant with layered aeration, comprising an aeration tank and inlet and outlet pipes fixedly arranged on both sides of the outer wall of the aeration tank, characterized in that, Also include: The first aeration mechanism and the second aeration mechanism are arranged at the bottom of the aeration tank, and are used for conveying air to the wastewater at different heights to improve the dissolved oxygen concentration of the wastewater at different heights and provide necessary oxygen for the aerobic microorganisms; The first aeration mechanism includes a bearing assembly, an elevating mechanism arranged inside the bearing assembly and utilizing external input air power to automatically float upward or downward, and conveying different amounts of air to the bottom area, the middle area and the top area of the aeration tank during the floating process, and a plurality of aeration generating assemblies arranged on the outer wall of the elevating mechanism and automatically swinging during the floating process to increase the aeration area and agitate the wastewater; A fan is fixedly arranged on the side wall of the aeration tank and controlled to operate by the controller, the output end of the fan is connected with the first aeration mechanism and the second aeration mechanism through pipelines, and the fan is used for conveying oxygen-enriched air to the first aeration mechanism and the second aeration mechanism at the same time; The first aeration mechanism and the second aeration mechanism have the same structure, the bearing assembly includes a bearing cylinder detachably arranged at the bottom of the aeration tank and a cylinder cover fixedly arranged at the top of the bearing cylinder, a gas supply pipe is fixedly arranged at the top of the cylinder cover, one end of the gas supply pipe penetrates through the cylinder cover and is fixedly connected with a third gas supply hose, a guide rod is fixedly arranged at the bottom of the inner cavity of the bearing cylinder, the elevating mechanism slides upward or downward along the outer wall of the guide rod, a plurality of elevating avoiding through grooves corresponding to the positions of the aeration generating assemblies are uniformly arranged on the outer wall of the bearing cylinder, and the aeration generating assemblies are slidably arranged in the elevating avoiding through grooves at the corresponding positions; The rocking driving assembly includes first vertical plates and second vertical plates fixedly arranged on the inner wall of the elevating avoiding through groove, a plurality of first arc-shaped protrusions and second arc-shaped protrusions are fixedly arranged on the opposite side walls of the first vertical plates and the second vertical plates, and the first arc-shaped protrusions and the second arc-shaped protrusions are arranged alternately; The elevating mechanism includes a suspension cylinder and a plurality of mounting holes uniformly arranged on the side wall of the suspension cylinder, annular grooves are arranged on the upper and lower sides of the outer wall of the suspension cylinder, air bags are fixedly arranged in each annular groove, the buoyancy generated by the air bags after being inflated allows the elevating mechanism to be suspended in the wastewater, a plurality of elevating driving assemblies are uniformly arranged at the bottom of the suspension cylinder, a touch assembly that simultaneously touches the elevating driving assemblies to change the direction of the thrust is arranged below the elevating driving assemblies and at the bottom of the bearing cylinder, a connecting ring is arranged at the top ends of the touch assemblies, and a distance sensor is fixedly arranged on one side of the top of the suspension cylinder; The touch assembly includes an annular seat fixedly arranged at the bottom of the inner cavity of the bearing cylinder, and a plurality of support columns corresponding to the positions of the elevating driving assemblies are fixedly arranged on the top of the annular seat. The lifting drive assembly comprises a power conversion cylinder and a protective cover fixed at the bottom of the power conversion cylinder, the inside of the power conversion cylinder is provided with an impeller by a rotating shaft, the rotating shaft penetrates through the power conversion cylinder and extends to the inside of the protective cover, a first propeller is fixed on the outer wall of the rotating shaft and located in the inside of the protective cover, a mounting seat is fixed on one side of the power conversion cylinder and located at the bottom of the suspension cylinder, a gas flow control assembly for controlling the output direction of air flow is arranged between the mounting seat and the power conversion cylinder, and first magnets are fixed on the top and bottom of the mounting seat.

2. A combined wastewater treatment plant with layered aeration according to claim 1, characterized in that: The gas flow control assembly comprises a connecting pipe fixed on the opposite side walls of the power conversion cylinder and the mounting seat, a box is fixed in the inside of the connecting pipe, the connecting pipe is equally divided into a first air duct and a second air duct by the box, a partition plate is fixed in the inside of the box, the inside space of the box is equally divided into an upper air chamber and a lower air chamber by the partition plate, a first exhaust hole and a second exhaust hole are respectively arranged on the two sides of the outer wall of the box, the first exhaust hole is in communication with the upper air chamber and the second air duct, the second exhaust hole is in communication with the lower air chamber and the first air duct, a vertical pipe is fixed on the side wall of the box, and an upper through hole and a lower through hole are respectively arranged on the upper and lower positions of the side wall of the vertical pipe and in communication with the upper air chamber and the lower air chamber.

3. A combined wastewater treatment plant with layered aeration according to claim 2, characterized in that: First and second jet pipes are respectively fixed on the two sides of the outer wall of the connecting pipe and used for connecting the power conversion cylinder with the first and second air ducts, and a gas cylinder is further sealingly and slidably arranged in the inside of the vertical pipe, the gas cylinder is connected with the suspension cylinder through a pipeline, an exhaust port is arranged on the side wall of the gas cylinder close to the box, the exhaust port is in communication with the upper through hole and the lower through hole when the gas cylinder moves downward or upward to the limit position, upper and lower push rods are respectively fixed on the top and bottom of the connecting pipe, second magnets are fixed on the outer walls of the upper and lower push rods, and the upper and lower push rods slidably penetrate through the mounting seat and extend to the outside.

4. A combined wastewater treatment plant with layered aeration according to claim 1, characterized in that: The aeration generating assembly comprises first and second support pipes, the first and second support pipes are connected through a second gas supply hose, a plurality of aeration head assemblies are uniformly fixed on the top of the first support pipe, rotating blocks are fixed on the top and bottom of the outer wall of the first support pipe, swing arms are fixed on the two sides of the outer wall of the rotating blocks, swing arm sleeves are fixed on the top and bottom of the second support pipe, and the two rotating blocks are rotatably arranged in the swing arm sleeves at corresponding positions.

5. A combined wastewater treatment plant with layered aeration according to claim 4, characterized in that: The aeration head assembly comprises a second propeller rotatably arranged on the top of an aeration head body through a rotating shaft, a plurality of scrapers are fixed on the outer wall of the rotating shaft and slide close to the outer wall of the aeration head body, a bubble cutting cavity is arranged in the inside of the scraper, and a blade is fixed in the inside of the bubble cutting cavity.

6. A combined wastewater treatment process with layered aeration, characterized by: The method comprises the following steps: Step 1, the fan sucks air and inputs the air into the first and second aeration mechanisms through pipelines; Step 2, the first aeration mechanism and the second aeration mechanism release air in the sewage in the aeration tank through a plurality of aeration generating components, and at the same time the aeration generating components release air into the sewage, the lifting mechanism pushes itself to move upward or reciprocate upward in the bearing component by the input air; Step 3, while the plurality of aeration generating components move upward or downward, the bearing cylinder component drives the aeration generating components to swing reciprocate in the horizontal direction, release air in a larger range and stir the sewage.

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