Wastewater treatment system using pressurized MBR and oxygen-rich air nanobubbles

Abstract

This invention relates to the field of wastewater treatment technology, and more particularly to a wastewater treatment system employing pressurized MBR and oxygen-enriched air nanobubbles. The system includes a base frame, with a pretreatment tank and a high-pressure oxygen-enriching tank located on either side of the top of the base frame. An adjustment mechanism is located on the back of the base frame, with a drive mechanism at the top and an aeration and stirring mechanism at the bottom. The aeration and stirring mechanism includes a pretreatment sealing cover and a high-pressure sealing cover. A stirring module is movably installed at the bottom of the pretreatment sealing cover for mixing wastewater with pretreatment agents. An aeration module is movably connected to the bottom of the high-pressure sealing cover for filtering and degrading wastewater with oxygen-enriched air nanobubbles. The aeration module includes an aeration main pipe, with aeration branch pipes arranged in a ring at equal intervals at the bottom of the main pipe. This system is simple to operate, highly controllable, safe and stable, and highly adaptable, meeting the requirements for pressurized MBR and oxygen-enriched air nanobubble treatment of different types of wastewater, effectively improving treatment efficiency and effect.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a wastewater treatment system employing pressurized MBR and oxygen-enriched air nanobubbles. Background Technology

[0002] Membrane bioreactor (MBR) technology, as a novel process that deeply integrates biodegradation and membrane separation, has been widely used in the field of wastewater treatment due to its unique advantages. This technology replaces the secondary sedimentation tank in traditional processes with microfiltration or ultrafiltration membranes. Through the efficient retention of the membrane, sludge and water are separated, which can not only significantly improve the quality of effluent and directly meet the requirements for reclaimed water reuse, but also maintain a higher concentration of activated sludge in the bioreactor, thereby enhancing the degradation efficiency of pollutants by microorganisms.

[0003] Chinese invention patent application CN117509900A relates to a device for short-cut denitrification of wastewater with a low C / N ratio, comprising an outer cylinder, a middle cylinder and an inner cylinder suspended inside the outer cylinder, and a short-cut nitrification zone within the inner cylinder. Between the inner cylinder and the middle cylinder are an upper gas evolution zone and a lower contact reduction zone. Between the middle cylinder and the outer cylinder is a sulfur autotrophic denitrification zone. An oxygen supply system is also provided on the outside of the outer cylinder and connected thereto. This wastewater treatment system has low treatment efficiency and poor treatment effect.

[0004] When treating high-concentration organic wastewater, traditional MBR technology struggles to achieve uniform and rapid contact between wastewater and pretreatment agents such as flocculants, conditioners, and oxygen-enriched air. This not only leads to low agent utilization and reduced oxygen transfer efficiency but also necessitates increasing system energy consumption, such as extending reaction time and increasing stirring power, to compensate for insufficient reaction. Ultimately, this results in higher treatment costs, and the pollutant degradation effect remains limited by mass transfer efficiency, making it difficult to achieve the desired level.

[0005] Secondly, while nano-oxygenated bubbles, especially ozone-containing nano-bubbles, are used to enhance the oxidative degradation of recalcitrant organic matter, they are difficult to achieve uniform diffusion in wastewater. In some areas, the concentration of oxygen is too high due to bubble aggregation, while in other areas, the absence of bubbles creates anoxic zones. This not only affects the uniformity of microbial degradation but also reduces the oxidative efficiency of ozone, thus limiting the removal of recalcitrant pollutants in high-concentration organic wastewater and failing to meet stringent emission standards.

[0006] When oxygen-enriched bubbles degrade wastewater at the same location for an extended period, the bubble flow decreases, thereby reducing the wastewater degradation capacity. Furthermore, wastewater contains many impurities, requiring filtration during the oxygen-enriched bubble degradation process. Filter plates are prone to clogging after prolonged use. Additionally, the volume of oxygen-enriched bubbles varies at different heights within the wastewater, causing them to flow downwards to the filter plates and cavitation, resulting in varying degrees of damage to the filter plates. Summary of the Invention

[0007] To address the aforementioned problems, this invention proposes a wastewater treatment system employing pressurized MBR and oxygen-enriched air nanobubbles, which can more accurately solve the problems described above.

[0008] The present invention is achieved through the following technical solution: a sewage treatment system using pressurized MBR and oxygen-enriched air nanobubbles, including a base frame, a pretreatment tank and a high-pressure oxygen-enriched tank respectively on the top two sides of the base frame, an adjustment mechanism on the back of the base frame, a drive mechanism on the top of the adjustment mechanism, and an aeration and stirring mechanism at the bottom of the drive mechanism.

[0009] The aeration and stirring mechanism includes a pretreatment sealing cover and a high-pressure sealing cover. An agitation module is movably installed at the bottom of the pretreatment sealing cover for stirring and mixing wastewater with pretreatment agents. An aeration module is movably connected at the bottom of the high-pressure sealing cover for filtering and degrading wastewater with oxygen-rich air nanobubbles.

[0010] The aeration module includes an aeration main pipe, with aeration branch pipes arranged in a ring at equal intervals at the bottom of the aeration main pipe. A filter plate is rotatably connected to the outer surface of the aeration main pipe and below the aeration branch pipes via a bearing ring. A fan-shaped plate is slidably connected inside the filter plate. The up and down movement of the aeration main pipe drives the fan-shaped plate to move up and down and adjusts the filtration diameter.

[0011] This application is simple to operate, highly controllable, safe and stable, and highly adaptable, meeting the requirements of pressurized MBR and oxygen-enriched air nanobubble treatment for different types of wastewater, effectively improving treatment efficiency and effect.

[0012] Furthermore, an ozone micro-nano bubble integrated machine is installed on one side of the back of the base frame, and a sewage discharge check valve is installed at the bottom of the pretreatment tank. The other end of the sewage discharge check valve is connected to the inside of the high-pressure oxygen-enriched tank through a delivery pipe. The other end of the high-pressure oxygen-enriched tank is connected to a guide hose through a recovery check valve. The other end of the guide hose is connected to a membrane bioreactor. A sludge filter screen is installed at the input end of the guide hose. The pretreatment sealing cover and the high-pressure sealing cover are both fixedly installed at the bottom of the drive mechanism.

[0013] Furthermore, the adjustment mechanism includes a rail frame, which is fixedly installed on the back of the base frame. A first motor is provided at the bottom of the rail frame, and a lead screw is provided through the output end of the first motor through the rail frame. The lead screw is rotatably connected to the inside of the rail frame. A slider is threadedly connected to the outer surface of the lead screw. The slider is slidably connected to the inside of the rail frame. A bracket is provided at the top of the slider, and a top plate is provided at the top of the bracket. The drive mechanism is fixedly installed at the bottom front end of the top plate.

[0014] Furthermore, a sewage inlet valve is provided on one side of the top front end of the pretreatment sealing cover, and a sewage inlet pipe is provided at the input end of the sewage inlet valve. A pressure regulating valve is provided in the middle of the top front end of the high-pressure sealing cover, and an ozone discharge pipe is provided at the output end of the pressure regulating valve. A waste gas treatment equipment connection flange is provided at the output end of the ozone discharge pipe. Both the pretreatment tank and the high-pressure oxygen enrichment tank are provided with elastic pressure rings at the top, and the top of the elastic pressure rings is sealed with the bottom of the pretreatment sealing cover and the high-pressure sealing cover.

[0015] Furthermore, the drive mechanism includes a concave frame, a driven gear ring, and a connecting frame. The concave frame is fixedly installed at the front end of the top plate. The pretreatment sealing cover and the high-pressure sealing cover are respectively fixedly installed on the bottom two sides of the concave frame. Driven gears are rotatably connected to both sides of the bottom of the connecting frame. A drive gear is rotatably connected to the middle of the bottom of the connecting frame. A second motor is provided in the middle of the top of the connecting frame.

[0016] Furthermore, the output end of the second motor is connected to the top of the drive gear, the drive gear and the driven gear are meshed, the bottom of the driven gear is rotatably connected to the top inner side of the pretreatment sealing cover and the high pressure sealing cover, the driven gear ring is rotatably connected to the top middle of the pretreatment sealing cover and the high pressure sealing cover respectively, the top of the stirring module and the aeration module are connected to the driven gear ring, and the driven gear ring and the driven gear are meshed.

[0017] Furthermore, the agitation module includes a rotating shaft, which is rotatably connected to the middle of the pretreatment sealing cover. The upper end of the rotating shaft is connected to the bottom of the driven toothed ring located on the top of the pretreatment sealing cover via a sealing coupling. Agitating plates are arranged in a ring at equal intervals on the outer surface of the rotating shaft. Agitating augers are provided at the bottom of the rotating shaft and the bottom of the aeration main pipe. The outer surfaces of the agitating augers are respectively attached to the inner walls of the bottom of the pretreatment tank and the high-pressure oxygen-enriched tank.

[0018] Furthermore, the aeration module also includes a rotary joint, which is rotatably connected to the top center of the high-pressure sealing cover. The driven toothed ring on the top of the high-pressure sealing cover is fixedly installed on the outside of the rotary joint. A connecting hose is rotatably connected to the top of the rotary joint. The input end of the connecting hose is connected to the output end of the ozone micro-nano bubble integrated machine. The bottom of the rotary joint is connected to the top of the aeration main pipe. Aeration micropores are evenly spaced at the bottom of the aeration branch pipe. Aeration stirring mesh plates are evenly spaced in a ring on the outer surface of the aeration main pipe. The lower ends of the pretreatment tank and the high-pressure oxygen-enriched tank are both conical. The lower end of the stirring auger is also conical. A sludge discharge valve is provided at the bottom output end of the high-pressure oxygen-enriched tank.

[0019] Furthermore, a negative pressure treatment mechanism is provided on the outside of the membrane bioreactor. The negative pressure treatment mechanism includes a negative pressure tank, which is fixedly installed on the side of the membrane bioreactor away from the base frame. A vacuum negative pressure pump is provided on the upper outside of the negative pressure tank. The input end of the vacuum negative pressure pump is connected to the inside of the negative pressure tank. The input end of the negative pressure tank is connected to the output end of the membrane bioreactor. A drain valve is provided at the bottom of the negative pressure tank.

[0020] Furthermore, the filter plate has an annular cavity on its peripheral side, and a fan-shaped plate is slidably connected inside the annular cavity. The filter plate has a plurality of filter holes evenly distributed inside, and the fan-shaped plate has a plurality of staggered holes evenly distributed inside. The staggered holes are staggered with the filter holes. A reset block is provided at the end of the fan-shaped plate near the aeration main pipe. The other end of the reset block is fixedly connected to the side wall of the annular cavity. Sealing strips are provided on both sides of the fan-shaped plate. The high-pressure oxygen-enriching tank has a plurality of limiting grooves evenly distributed inside. A wedge-shaped surface is provided on the inner wall of the limiting groove. A wedge-shaped block is slidably connected inside the limiting groove. The other end of the wedge-shaped block is fixedly connected to the side wall of the fan-shaped plate. The wedge-shaped block and the wedge-shaped surface are wedge-shaped and slidably connected.

[0021] The beneficial effects of this invention are:

[0022] 1. During the application of this technical solution, by setting up an adjustment mechanism, a drive mechanism and a stirring module, it can achieve full mixing with the pretreatment agent, avoid sewage stratification during static settling, and facilitate sewage discharge, thereby achieving the effects of improving the uniformity of pretreatment, reducing system energy consumption, and efficiently completing water quality conditioning and homogenization treatment.

[0023] 2. During the application of this technical solution, by setting up a delivery pipe, an integrated ozone micro-nano bubble machine, an aeration module, and pressure regulation components, it can improve oxygen dissolution efficiency, enhance microbial degradation capacity, improve the treatment efficiency of membrane bioreactors, avoid waste gas pollution, and ensure the cleanliness of the high-pressure oxygen-enriched tank.

[0024] 3. During the application of this technical solution, by setting up sludge filter screens, membrane bioreactors, negative pressure treatment mechanisms and waste gas treatment-related pipelines, it can prevent pipe and membrane module blockage, improve clean water collection efficiency, avoid air bubbles affecting clean water collection, and reduce waste gas pollution.

[0025] 4. During the application of this technical solution, by setting up adjustment mechanisms and various protective components, it reduces maintenance difficulty, shortens maintenance cycle, reduces manpower and time costs, and ensures stable and efficient operation of the system.

[0026] 5. During the application of this technical solution, by setting up the aeration main pipe, aeration branch pipe, filter plate and fan-shaped plate, it effectively achieves the filtration and removal of impurities from the sewage inside the high-pressure oxygen-enriched tank, improves the flow degradation efficiency of sewage, ensures that impurities in sewage are uniformly and thoroughly filtered and removed, reduces the cavitation impact damage of oxygen-enriched air nanobubbles to the filter plate, and improves the service life of the equipment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the rear view structure of the present invention;

[0029] Figure 3 This is a top view of the structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the present invention from a bottom view;

[0031] Figure 5 This is a schematic diagram of the extended state structure of the present invention;

[0032] Figure 6 This is a top view schematic diagram of the driving mechanism and aeration stirring mechanism of the present invention;

[0033] Figure 7 This is a bottom view schematic diagram of the driving mechanism and aeration stirring mechanism of the present invention;

[0034] Figure 8 This is a top view of the structure of the second embodiment of the present invention;

[0035] Figure 9 for Figure 8 Enlarged view of point A in the middle;

[0036] Figure 10 This is a schematic diagram of the aeration module structure according to the second embodiment of the present invention;

[0037] Figure 11 This is a front view of the internal structure of the filter plate according to the second embodiment of the present invention;

[0038] Figure 12 This is a schematic diagram of the internal structure of the filter plate according to the second embodiment of the present invention.

[0039] In the diagram: 1. Base frame; 2. Membrane bioreactor; 3. Negative pressure treatment mechanism; 31. Negative pressure tank; 32. Vacuum negative pressure pump; 33. Drain valve; 4. Pretreatment tank; 5. High-pressure oxygen-enriched tank; 51. Limiting groove; 52. Wedge-shaped surface; 6. Adjustment mechanism; 61. Rail frame; 62. First motor; 63. Lead screw; 64. Sliding block; 65. Support; 66. Top plate; 7. Drive mechanism; 71. Concave frame; 72. Driven gear ring; 73. Connecting frame; 74. Driven gear; 75. Driven gear; 76. Second motor; 8. Aeration and stirring mechanism; 81. Pretreatment sealing cover; 82. High-pressure sealing cover; 83. Stirring module; 831. Rotating shaft; 832. Stirring plate; 833. Stirring auger 84. Aeration module; 841. Rotary joint; 842. Connecting hose; 843. Main aeration pipe; 844. Aeration branch pipe; 845. Aeration micropores; 846. Filter plate; 847. Filter holes; 848. Bearing ring; 849. Sector plate; 8410. Misalignment hole; 8411. Wedge block; 8412. Reset block; 8413. Sealing strip; 8414. Ring cavity; 85. Wastewater inlet valve; 86. Ozone discharge pipe; 87. Aeration stirring screen; 88. Pressure regulating valve; 9. Ozone micro-nano bubble integrated machine; 10. Sewage discharge check valve; 11. Conveying pipe; 12. Guide hose; 13. Sludge filter screen; 14. Sludge discharge valve; 15. Elastic pressure ring; 16. Recovery check valve. Detailed Implementation

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

[0041] First Embodiment

[0042] like Figures 1-7As shown, a wastewater treatment system employing pressurized MBR and oxygen-enriched air nanobubbles includes a base frame 1. A membrane bioreactor 2 is located on one side of the base frame 1, and a negative pressure treatment mechanism 3 is located outside the membrane bioreactor 2. A pretreatment tank 4 and a high-pressure oxygen-enriching tank 5 are located on opposite sides of the top of the base frame 1. An adjustment mechanism 6 is located on the back of the base frame 1, with a drive mechanism 7 at the top and an aeration and stirring mechanism 8 at the bottom. The drive mechanism 7 covers the tops of both the pretreatment tank 4 and the high-pressure oxygen-enriching tank 5. The aeration end and stirring end of the aeration and stirring mechanism 8 are inserted into the interiors of the high-pressure oxygen-enriching tank 5 and the pretreatment tank 4, respectively. An ozone micro-nanobubble integrated machine 9 is located on one side of the back of the base frame 1, and a one-way discharge valve 10 is located at the bottom of the pretreatment tank 4. The other end of the discharge check valve 10 is connected to the inside of the high-pressure oxygen-enriched tank 5 through the conveying pipe 11. Therefore, under the action of the discharge check valve 10, the sewage inside the pretreatment tank 4 can be mixed with oxygen-enriched air nanobubbles and degraded along the conveying pipe 11 inside the high-pressure oxygen-enriched tank 5. The other end of the high-pressure oxygen-enriched tank 5 is connected to the guide hose 12 through the recovery check valve 16. The bottom output end of the high-pressure oxygen-enriched tank 5 is connected to the membrane bioreactor 2 through the guide hose 12. The degraded sewage inside the high-pressure oxygen-enriched tank 5 is discharged unidirectionally along the guide hose 12. A sludge filter screen 13 is provided at the input end of the guide hose 12 inside the high-pressure oxygen-enriched tank 5. The sludge filter screen 13 is used to perform the final filtration of the sewage inside the high-pressure oxygen-enriched tank 5 to ensure the quality of subsequent sewage.

[0043] The aeration and stirring mechanism 8 includes a pretreatment sealing cover 81 and a high-pressure sealing cover 82. Both the pretreatment sealing cover 81 and the high-pressure sealing cover 82 are fixedly installed at the bottom of the drive mechanism 7. The pretreatment sealing cover 81 covers the top of the pretreatment tank 4, and the high-pressure sealing cover 82 covers the top of the high-pressure oxygen-enriching tank 5. An agitation module 83 is movably installed at the bottom of the pretreatment sealing cover 81, and an aeration module 84 is movably connected to the bottom of the high-pressure sealing cover 82. The input end of the aeration module 84 is connected to the output end of the ozone micro-nano bubble integrated machine 9. The bottom output end of the drive mechanism 7 is connected to the agitation module 84. The top of group 83 and aeration module 84 are connected. During the operation of this device, the wastewater to be treated is first introduced into pretreatment tank 4. Then, drive mechanism 7 starts and drives agitation module 83 of aeration and agitation mechanism 8 to run. Agitation module 83 agitates the wastewater in pretreatment tank 4, which can fully mix the wastewater with any pretreatment agents that may be added, avoid uneven treatment of wastewater in certain areas, improve the pretreatment effect, and lay a good foundation for subsequent treatment. After pretreatment, the treated wastewater in pretreatment tank 4 is transported to high-pressure oxygen-enriched tank 5, while ozone micro-nano bubble integrated machine 9 is activated. Upon startup, the generated oxygen-enriched air nanobubbles are input into the high-pressure oxygen-enriching tank 5 through the aeration module 84. The drive mechanism 7 synchronously drives the aeration module 84, ensuring the oxygen-enriched air nanobubbles diffuse evenly throughout the wastewater in the high-pressure oxygen-enriching tank 5, significantly increasing the dissolved oxygen content and providing sufficient oxygen for subsequent pollutant degradation. After oxygen enrichment treatment is completed in the high-pressure oxygen-enriching tank 5, the relevant valve at its bottom output end is opened, and the wastewater is transported to the membrane bioreactor 2 via the guide hose 12. During this process, the sludge filter screen 13 located at the input end of the guide hose 12 in the high-pressure oxygen-enriching tank 5 can... Residual sludge in the wastewater is filtered to prevent it from entering the membrane bioreactor 2 and affecting its normal operation. After the wastewater enters the membrane bioreactor 2, the membrane bioreactor 2 filters the wastewater to achieve sludge-water separation. The negative pressure treatment mechanism 3 on the outside of the membrane bioreactor 2 is activated to accelerate the separation efficiency of clean water and pollutants and increase the effluent speed. In addition, the sealing regulating valve at the output end of the guide hose 12 can adjust the wastewater delivery pressure according to the operating requirements of the membrane bioreactor 2 to ensure that the membrane bioreactor 2 is always in a suitable operating pressure environment, further ensuring the treatment effect.

[0044] The adjustment mechanism 6 includes a rail frame 61, which is fixedly installed on the back of the base frame 1. A first motor 62 is provided at the bottom of the rail frame 61. A lead screw 63 is provided through the output end of the first motor 62 and is rotatably connected to the inside of the rail frame 61. A slider 64 is threadedly connected to the outer surface of the lead screw 63 and is slidably connected to the inside of the rail frame 61. A bracket 65 is provided at the top of the slider 64 and a top plate 66 is provided at the top of the bracket 65. The drive mechanism 7 is fixedly installed at the bottom front end of the top plate 66. A sewage inlet valve 85 is provided on one side of the top front end of the pretreatment sealing cover 81. A sewage inlet pipe is provided at the input end of the sewage inlet valve 85. A pressure regulating valve 88 is provided in the middle of the top front end of the high-pressure sealing cover 82. An ozone discharge pipe 86 is provided at the output end of the pressure regulating valve 88 and a waste gas treatment equipment connection flange is provided at the output end of the ozone discharge pipe 86.

[0045] During the application of this device, in the sewage introduction stage, the sewage to be treated can be directed into the pretreatment tank 4 through the sewage inlet valve 85 on the top of the pretreatment sealing cover 81 and the sewage inlet pipe. No manual dumping or other temporary conveying devices are required. Operation is convenient and the sewage inflow can be precisely controlled, avoiding sewage overflow and waste or pollution, ensuring a stable and orderly sewage supply during the pretreatment stage. When the position of the drive mechanism 7 needs to be adjusted to adapt to maintenance or different treatment requirements, the adjustment mechanism 6 is activated, and the first motor 62 at the bottom of the rail frame 61 runs, driving the lead screw 63 inside the rail frame 61 to rotate. The slider 64, threadedly connected to the lead screw 63, slides along the rail frame 61. The support 65 on the top of the slider 64 and the top of the support 65... The top plate 66 moves accordingly, thereby driving the drive mechanism 7 fixed at the bottom front end of the top plate 66 to adjust its position. There is no need to manually move or disassemble the drive mechanism 7, saving manpower and enabling quick position calibration, thus improving the operational flexibility of the equipment. During the operation of the high-pressure oxygen-enriched tank 5, if the pressure inside the tank increases due to the continuous entry of oxygen-enriched air nanobubbles, the pressure regulating valve 88 on the top of the high-pressure sealing cover 82 can adjust the pressure inside the tank in real time. Excess gas is transported to the external waste gas treatment equipment through the ozone discharge pipe 86 and the waste gas treatment equipment connection flange, avoiding safety hazards caused by excessive pressure inside the tank, and preventing untreated ozone from being directly emitted and polluting the air. This balances the safety and environmental protection of the equipment operation, ensuring the stable and compliant operation of the system.

[0046] The drive mechanism 7 includes a concave frame 71, a driven gear ring 72, and a connecting frame 73. The concave frame 71 is fixedly installed at the front end of the top plate 66. The pretreatment sealing cover 81 and the high-pressure sealing cover 82 are respectively fixedly installed on the bottom sides of the concave frame 71. Driven gears 74 are rotatably connected to both sides of the bottom of the connecting frame 73. A driving gear 75 is rotatably connected to the middle of the bottom of the connecting frame 73. A second motor 76 is provided in the middle of the top of the connecting frame 73. The output end of the second motor 76 is connected to the top of the driving gear 75. The driving gear 75 and the driven gear 74 are meshed. The bottom of the driven gear 74 is connected to the pretreatment sealing cover 81. The high-pressure sealing cover 82 is rotatably connected to the top inner side of the pretreatment sealing cover 81 and the high-pressure sealing cover 82. The driven gear ring 72 is rotatably connected to the top middle of the pretreatment sealing cover 81 and the high-pressure sealing cover 82 respectively. The top of the stirring module 83 and the aeration module 84 are connected to the driven gear ring 72. The driven gear ring 72 and the driven gear 74 are meshed. The stirring module 83 includes a rotating shaft 831, which is rotatably connected to the middle of the pretreatment sealing cover 81. The upper end of the rotating shaft 831 is connected to the bottom of the driven gear ring 72 located at the top of the pretreatment sealing cover 81 through a sealing coupling. The outer surface of the rotating shaft 831 is provided with stirring plates 832 arranged in a ring at equal intervals.

[0047] During the application of this device, when it is necessary to agitate the wastewater in the pretreatment tank 4, the drive mechanism 7 starts first, and the second motor 76 at the top of the connecting frame 73 starts running, driving the drive gear 75 in the middle of the bottom to rotate. Since the drive gear 75 meshes with the driven gears 74 on both sides of the bottom of the connecting frame 73, the rotation of the drive gear 75 will synchronously drive the driven gears 74 to rotate. The driven gears 74, in turn, mesh with the driven gear ring 72 in the middle of the top of the pretreatment sealing cover 81, thereby driving the driven gear ring 72 to rotate. The rotating shaft 831 of the agitation module 83, which is connected to the bottom of the driven gear ring 72 through a sealing coupling, will rotate with the driven gear ring 73. 2. When the shaft 831 rotates, the agitator plates 832 arranged in a ring on the outer surface of the shaft 831 also rotate, forming a multi-directional agitation of the sewage in the pretreatment tank 4. This transmission method can ensure stable power transmission and avoid power loss, so that the agitator plates 832 can act evenly on the sewage, effectively breaking the static stratification state of the sewage. If pretreatment agents need to be added, the agents can be quickly and fully mixed with the sewage without the need for additional stirring equipment, reducing energy consumption. At the same time, the sealing coupling can prevent sewage or gas from leaking from the connection between the shaft 831 and the pretreatment sealing cover 81, ensuring the airtightness of the pretreatment environment and laying a stable foundation for subsequent sewage treatment.

[0048] The aeration module 84 includes an aeration main pipe 843, through which oxygen-rich air nanobubbles are introduced. The aeration module 84 also includes a rotary joint 841, which is rotatably connected to the top center of a high-pressure sealing cover 82. A driven toothed ring 72 on the top of the high-pressure sealing cover 82 is fixedly installed on the outside of the rotary joint 841. A connecting hose 842 is rotatably connected to the top of the rotary joint 841, with its input end connected to the output end of the ozone micro-nanobubble integrated machine 9. The bottom of the rotary joint 841 is connected to the top of the aeration main pipe 843. Aeration branch pipes 844 are arranged in a ring at equal intervals at the bottom of the aeration main pipe 843. Aeration micropores 845 are evenly spaced at the bottom of each aeration branch pipe 844. Both the bottom of the rotating shaft 831 and the bottom of the aeration main pipe 843 are equipped with... There is an agitator 833, the outer surface of which is attached to the inner wall of the bottom of the pretreatment tank 4 and the high-pressure oxygen-enriched tank 5 respectively. The outer surface of the aeration main pipe 843 is provided with aeration agitator mesh plates 87 arranged in a ring at equal intervals. The lower ends of the pretreatment tank 4 and the high-pressure oxygen-enriched tank 5 are both set in a conical shape. The lower end of the agitator 833 is set in a conical shape. The bottom output end of the high-pressure oxygen-enriched tank 5 is provided with a sludge discharge valve 14. The negative pressure treatment mechanism 3 includes a negative pressure tank 31, which is fixedly installed on the side of the membrane bioreactor 2 away from the base frame 1. The upper outer side of the negative pressure tank 31 is provided with a vacuum negative pressure pump 32. The input end of the vacuum negative pressure pump 32 is connected to the inside of the negative pressure tank 31. The input end of the negative pressure tank 31 is connected to the output end of the membrane bioreactor 2. The bottom of the negative pressure tank 31 is provided with a drain valve 33.

[0049] During the application of this device, when it is used for aeration treatment in the high-pressure oxygen-enriched tank 5, the oxygen-enriched air nanobubbles generated by the ozone micro-nano bubble integrated machine 9 are transported to the rotary joint 841 through the connecting hose 842, and then enter the aeration main pipe 843 through the rotary joint 841. Finally, they are evenly released into the sewage from the aeration micropores 845 at the bottom of the aeration branch pipe 844. At the same time, the drive mechanism 7 drives the driven toothed ring 72 on the top of the high-pressure sealing cover 82 to rotate. The rotary joint 841 fixed on the outside of the driven toothed ring 72 rotates together with it, thereby driving the aeration main pipe 843 and the aeration stirring screen 87 on its outer surface to rotate. The aeration stirring screen 87 continuously stirs the sewage and bubbles, which can effectively break the bubble aggregation state, make the bubbles diffuse more evenly in the sewage, greatly increase the contact area between oxygen and sewage, improve dissolved oxygen efficiency, and provide sufficient oxygen source for microbial degradation of pollutants. The stirring auger 833 at the bottom of the aeration main pipe 843 and the bottom of the rotating shaft 831 are respectively connected to the aeration auger 833 at the bottom of the aeration main pipe 843 and the rotating shaft 831. The inner walls of the high-pressure oxygen-enriched tank 5 and the pretreatment tank 4 are fitted together at the bottom, and the lower end of the tank body and the lower end of the auger are both conical. When rotating, the sludge deposited at the bottom of the tank can be scraped to prevent sludge accumulation from clogging the aeration micropores 845 or affecting the flow of sewage. When the sludge in the high-pressure oxygen-enriched tank 5 needs to be discharged, the sludge discharge valve 14 at the bottom is opened, and the auger 833 can also help push the sludge to the discharge port, improving the sludge discharge efficiency. After the membrane bioreactor 2 completes the sludge-water separation, the negative pressure treatment mechanism 3 is started, and the vacuum negative pressure pump 32 runs to create a negative pressure environment in the negative pressure tank 31. The negative pressure can quickly draw the clean water in the membrane bioreactor 2 into the negative pressure tank 31, accelerate the clean water collection speed, and reduce the residence time of clean water on the surface of the membrane module. When the clean water in the negative pressure tank 31 accumulates to a certain amount, the drain valve 33 at the bottom can be opened to discharge the clean water. The whole process does not require additional pressurization equipment, is easy to operate, and can ensure the stability of the effluent, avoiding the problem of reduced system operating efficiency due to poor clean water discharge.

[0050] Before using this equipment, system initialization and pretreatment preparation must be completed. First, check the connection status and standby status of each component on the base frame 1, ensuring that the drain valve 10 at the bottom of the pretreatment tank 4 is closed, and that the conveying pipe 11 at the bottom of the base frame 1, the ozone micro-nano bubble integrated machine 9 on the back side of the base frame 1, and the negative pressure treatment mechanism 3 on the outside of the membrane bioreactor 2 are all in normal standby mode. By setting the adjustment mechanism 6 fixed on the back of the base frame 1, its rail frame 61 provides stable support for the entire adjustment structure. In the initial state, the slider 64 is engaged in the designated position of the rail frame 61, and the bracket 65 at the top of the slider 64 drives the top plate 66 to keep it horizontal. The drive mechanism 7 at the bottom front end of the top plate 66 is exactly above the pretreatment tank 4 and the high-pressure oxygen enrichment tank 5, so that the pretreatment sealing cover 81 at the bottom of the drive mechanism 7 accurately covers the top of the pretreatment tank 4 and the high-pressure sealing cover 82 is stably placed inside the high-pressure oxygen enrichment tank 5, effectively ensuring the sealing performance of the two tanks in the subsequent treatment process and avoiding sewage or gas leakage.

[0051] Subsequently, the wastewater to be treated is smoothly fed into the pretreatment tank 4 through the wastewater inlet valve 85 on one side of the top front end of the pretreatment sealing cover 81 via the wastewater inlet pipe. The wastewater inlet valve 85 can flexibly control the inflow rate and on / off state of the wastewater according to the treatment requirements. The wastewater inlet pipe provides a directional delivery channel for the wastewater, ensuring that the wastewater accurately enters the pretreatment tank 4 without overflowing. Then, the drive mechanism 7 is started. The concave frame 71 in the drive mechanism 7 provides installation support for the internal components. The second motor 76 in the middle of the top of the connecting frame 73 starts to run. The output end of the second motor 76 drives the drive gear 75 at its bottom to rotate. Since the drive gear 75 meshes with the driven gears 74 on both sides of the bottom of the connecting frame 73, the rotation of the drive gear 75 will synchronously drive the driven gear 74 to rotate. Since the driven gear 74 meshes with the driven gear ring 72 on the inner side of the top of the pretreatment sealing cover 81 and the high-pressure sealing cover 82, the driven gear 74 further drives the driven gear ring 72 to rotate. The stirring module 83 connected to the driven gear ring 72 of the pretreatment sealing cover 81 is then started.

[0052] Driven by the driven gear ring 72, the rotating shaft 831 of the stirring module 83 begins to rotate. The stirring plate 832 on the outer surface of the rotating shaft 831 rotates together with the rotating shaft 831, horizontally agitating the sewage in the pretreatment tank 4. At the same time, the agitator 833 at the bottom of the rotating shaft 831 rotates against the inner wall of the bottom of the pretreatment tank 4. By setting the bidirectional operation function of the agitator 833, during the pretreatment agitation, when it rotates in the forward direction, it can turn the material upward, causing the sewage to roll up and down, so as to achieve full contact and mixing between the sewage and the subsequently added pretreatment agents, avoiding the sewage from being mixed with the pretreatment agents. The presence of static stratification in the pretreatment tank 4 solves the problem of uneven reaction during pretreatment in traditional MBR technology. It eliminates the need to compensate for insufficient reaction by extending the reaction time or increasing the stirring power, effectively reducing system energy consumption. When sludge needs to be discharged from the tank after pretreatment, simply control the drive mechanism 7 to drive the agitator 833 to rotate in the opposite direction, which will drive the sludge downward toward the discharge check valve 10, making the discharge operation convenient and efficient. At the same time, it completes the water quality conditioning and homogenization of the wastewater, laying a good foundation for the subsequent treatment stage in the high-pressure oxygen-enriched tank 5.

[0053] After the pretreatment stage, the treated wastewater in pretreatment tank 4 is smoothly introduced into high-pressure oxygen-enriched tank 5 to ensure that the wastewater can smoothly enter the next treatment stage. Once the wastewater in high-pressure oxygen-enriched tank 5 reaches the preset treatment capacity, the ozone micro-nano bubble integrated machine 9 is started. The oxygen-enriched air nanobubbles generated by the ozone micro-nano bubble integrated machine 9 are transported to the rotary joint 841 of the aeration module 84 through the connecting hose 842. The connecting hose 842 provides a flexible transport channel for the bubbles to adapt to slight vibrations in the system. At this time, the drive mechanism 7 continues to operate, driving the aeration module 84 in high-pressure oxygen-enriched tank 5 to work. The driven toothed ring 72 on the top of the high-pressure sealing cover 82 drives the rotary joint 841 to rotate. The aeration main pipe 843 at the bottom of the rotary joint 841 rotates together with the rotary joint 841, and the aeration branch pipe 844 at the bottom of the aeration main pipe 843 rotates synchronously. The oxygen-enriched air nanobubbles are evenly released into the sewage in the high-pressure oxygen-enriched tank 5 through the aeration micropores 845 at the bottom of the aeration branch pipe 844. By setting the aeration stirring screen plate 87 on the outer surface of the aeration main pipe 843, the screen plate further stirs the sewage and bubbles when the aeration main pipe 843 rotates, breaking the state of bubble aggregation, promoting the uniform diffusion of bubbles in the sewage, effectively solving the problem of uneven contact between nano-oxygenated bubbles and solution, improving the oxygen dissolution efficiency in sewage, and thus enhancing the degradation capacity of aerobic microorganisms in sewage.

[0054] As oxygen-enriched air nanobubbles continuously enter the high-pressure oxygen-enrichment tank 5, the internal pressure gradually increases. Simultaneously, a sealing regulating valve is located at the output end of the guide hose 12. When a high-pressure environment is required during the membrane bioreactor 2's treatment process to improve reaction efficiency, the sealing regulating valve can be opened. At this time, the high pressure inside the high-pressure oxygen-enrichment tank 5 is transmitted to the membrane bioreactor 2 through the guide hose 12, acting on the reaction process of the membrane bioreactor 2, promoting more efficient sludge-water separation and pollutant degradation reactions, further improving the treatment efficiency of the membrane bioreactor 2. Meanwhile, through the high-pressure sealing cap 82 at its top front end... The pressure regulating valve 88 can adjust the pressure inside the high-pressure oxygen-enriched tank 5 in real time. When the pressure inside the tank is too high, the excess gas enters the ozone discharge pipe 86 through the pressure regulating valve 88. The output end of the ozone discharge pipe 86 is connected to the connection flange of the waste gas treatment equipment. The excess gas is transported to the external waste gas treatment equipment for purification through the connection flange of the waste gas treatment equipment to avoid direct emission of waste gas and environmental pollution. If sludge accumulates at the bottom of the high-pressure oxygen-enriched tank 5, the sludge discharge valve 14 at the bottom can be opened to discharge the sludge out of the tank, ensuring the cleanliness of the inside of the high-pressure oxygen-enriched tank 5 and preventing sludge accumulation from affecting the subsequent treatment effect.

[0055] After aeration in the high-pressure oxygen-enriched tank 5 is completed, the output valve at the bottom of the tank is opened. Under the combined action of pressure and gravity within the tank, the wastewater is transported towards the membrane bioreactor 2 via the guide hose 12. A sludge filter screen 13 is installed at the input end of the guide hose 12 inside the high-pressure oxygen-enriched tank 5 to filter residual sludge impurities in the wastewater, preventing sludge from entering the guide hose 12 and clogging the pipes, or entering the membrane bioreactor 2 and clogging the membrane module. This ensures stable operation of all system components and reduces the probability of malfunctions. After the wastewater enters the membrane bioreactor 2, the membrane module inside the membrane bioreactor 2 filters the wastewater, achieving sludge-water separation. Pollutants in the wastewater are retained on one side of the membrane module, while clean water permeates through the membrane module and enters the effluent end of the membrane bioreactor 2. Simultaneously, the negative pressure treatment mechanism 3 on the outside of the membrane bioreactor 2 is activated. The negative pressure tank 31 in the negative pressure treatment mechanism 3 is fixed to one side of the membrane bioreactor 2, and the vacuum negative pressure pump 32 at the upper end of the outer side of the negative pressure tank 31 begins operation. The inlet is connected to the inside of the negative pressure tank 31. The vacuum negative pressure pump 32 creates a negative pressure environment inside the negative pressure tank 31. The negative pressure can quickly precipitate air bubbles in the water, achieving rapid bubble separation and preventing bubbles from adhering to the surface of the clean water and affecting subsequent collection. The inlet of the negative pressure tank 31 is connected to the outlet of the membrane bioreactor 2. Under the action of negative pressure, the filtered clean water in the membrane bioreactor 2 is quickly drawn into the negative pressure tank 31, improving the collection efficiency of clean water. After the clean water collected in the negative pressure tank 31 reaches a certain amount, the drain valve 33 at the bottom of the negative pressure tank 31 is opened to discharge the clean water from the system, completing the wastewater purification treatment. In addition, a pipe is provided at the outlet of the vacuum negative pressure pump 32 to connect to an external air handling unit. During the vacuum process of the vacuum negative pressure pump 32, ozone and other waste gases that may be present in the membrane bioreactor 2 will be extracted along with it. The extracted waste gas is transported to the external air handling unit for purification through this pipe, avoiding direct emission of waste gas and causing air pollution, further improving the environmental performance of this technical solution.

[0056] When the system requires maintenance or repair after running for a period of time, the adjustment mechanism 6 is activated, and the first motor 62 at the bottom of the adjustment mechanism 6 starts working. The output end of the first motor 62 passes through the rail frame 61 and drives the lead screw 63 inside the rail frame 61 to rotate. Since the lead screw 63 is threadedly connected to the slider 64, and the slider 64 is slidably connected inside the rail frame 61, the rotation of the lead screw 63 will drive the slider 64 to slide along the length of the rail frame 61. The bracket 65 at the top of the slider 64 moves together with the slider 64. The top plate 66 at the top of the bracket 65 drives the drive mechanism 7 and the aeration and stirring mechanism 8 at the bottom to move synchronously, so that the pretreatment sealing cover 81 leaves the top of the pretreatment tank 4 and the high-pressure sealing cover 82 leaves the interior of the high-pressure oxygen-enriched tank 5. The membrane module, aeration head, stirring module 83, aeration module 84 and other components inside the pretreatment tank 4 and high-pressure oxygen-enriched tank 5 can be inspected and repaired without disassembling the entire system. This effectively solves the problem of difficult maintenance of traditional equipment, shortens the maintenance cycle, reduces labor and time costs, and makes it suitable for continuous equipment maintenance. This technology is suitable for small and medium-sized wastewater treatment projects and application scenarios with high continuous operation requirements or limited operation and maintenance resources. When a certain amount of impurities or sediment accumulates in the pretreatment tank 4, simply opening the discharge valve on one side of its bottom (not shown in the figure), combined with the reverse rotation of the agitator 833, can quickly discharge the impurities out of the tank, ensuring the cleanliness of the pretreatment tank 4. This technical solution integrates all components into a single unit through the base frame 1. The pretreatment tank 4 is responsible for the initial treatment of wastewater, removing some impurities. The high-pressure oxygen-enriched tank 5 increases the dissolved oxygen content in the wastewater, enhancing microbial degradation. The membrane bioreactor 2, combined with the negative pressure treatment mechanism 3, improves sludge-water separation efficiency and effluent quality. All components work together to form a complete and efficient wastewater treatment process. Compared with traditional wastewater treatment technologies, the overall treatment efficiency is higher. Furthermore, by setting up protective components such as the sludge filter screen 13, pressure regulating valve 88, sealing regulating valve, and discharge check valve 10, the probability of system failure is effectively reduced, improving the reliability and practicality of system operation and meeting the wastewater treatment needs of different scenarios.

[0057] Second Embodiment

[0058] like Figures 8-12 As shown, both the pretreatment tank 4 and the high-pressure oxygen-enriched tank 5 are equipped with elastic pressure rings 15 at their tops. The tops of the elastic pressure rings 15 are sealed to the bottoms of the pretreatment sealing cover 81 and the high-pressure sealing cover 82. The elastic pressure rings 15 are elastic, so when the pretreatment sealing cover 81 and the high-pressure sealing cover 82 move up and down, they simultaneously squeeze the elastic pressure rings 15. The elastic pressure rings 15 undergo elastic deformation and remain sealed to the pretreatment sealing cover 81 and the high-pressure sealing cover 82.

[0059] A filter plate 846 is rotatably connected to the outer surface of the aeration main pipe 843 via a bearing ring 848. The filter plate 846 filters the sewage entering the high-pressure oxygen-enriched tank 5. A sector plate 849 is slidably connected inside the filter plate 846. The up-and-down movement of the aeration main pipe 843 drives the sector plate 849 to move up and down and adjust the filtration diameter. When the sector plate 849 moves closer to the end of the aeration main pipe 843, the sector plate 849 and the filter plate 846 are misaligned and overlapped, reducing the filtration diameter. An annular cavity 8414 is opened on the peripheral side of the filter plate 846. The sector plate 849 is slidably connected inside the annular cavity 8414. The setting of the annular cavity 8414 facilitates the adjustment of the sector plate 849. The movement of 49 is limited. The filter plate 846 is uniformly provided with multiple filter holes 847 inside. The position of the filter holes 847 corresponds to the aeration micropores 845, and the rotation speed of the aeration main pipe 843 corresponds to the gap between adjacent filter holes 847. Then, the oxygen-rich air nanobubbles discharged downward from the aeration micropores 845 are directly opposite the filter holes 847 and perform reverse impact to clear the impurities blocked inside. The fan-shaped plate 849 is uniformly provided with multiple staggered holes 8410 inside. The staggered holes 8410 are staggered with the filter holes 847. When the overlapping area of ​​the staggered holes 8410 and the filter holes 847 increases, the filtration diameter of the filter plate 846 for sewage increases.

[0060] A reset block 8412 is provided at the end of the sector plate 849 near the aeration main pipe 843. The other end of the reset block 8412 is fixedly connected to the side wall of the annular cavity 8414. The reset block 8412 is elastic and drives the sector plate 849 to move in the opposite direction to return to its original position. Sealing strips 8413 are provided on both sides of the sector plate 849. The sealing strips 8413 facilitate elastic compression sealing between two adjacent sector plates 849. Multiple limiting grooves 51 are evenly opened inside the high-pressure oxygen enrichment tank 5. The inner wall of the limiting groove 51 is provided with a wedge-shaped surface 52. The limiting grooves 51 are staggered with the guide hose 12. The inside of the limiting groove 51 is sealed. A wedge block 8411 is slidably connected, and the other end of the wedge block 8411 is fixedly connected to the side wall of the sector plate 849. The wedge block 8411 is slidably connected to the wedge surface 52. Therefore, when the filter plate 846 moves downward, the filter plate 846 drives the wedge block 8411 to move downward through the sector plate 849. The wedge block 8411 moves inside the limiting groove 51 and wedges with the wedge surface 52. The wedge block 8411 drives the sector plate 849 to move along the annular cavity 8414 towards the end closer to the aeration main pipe 843. The overlapping area of ​​the filter hole 847 and the misaligned hole 8410 decreases, and the filtration diameter of the filter plate 846 decreases.

[0061] The conveying pipe 11 is located below the filter plate 846, while the sludge filter screen 13 is located above the filter plate 846. The diameter of the filter hole 847 is larger than the filtration diameter of the sludge filter screen 13. Therefore, the sewage that is conveyed into the high-pressure oxygen-enriched tank 5 through the conveying pipe 11 needs to be filtered by the filter plate 846 and then flow upward to mix with oxygen-enriched air nanobubbles for degradation. After degradation, the sewage is filtered by the sludge filter screen 13 and then enters the guide hose 12 and flows backward to wait for subsequent treatment. The impurities filtered by the sludge filter screen 13 will fall onto the filter plate 846 and wait for subsequent recycling.

[0062] During the application of this equipment, wastewater is introduced into the pretreatment tank 4 according to the above process, and the drive mechanism 7 drives the rotating shaft 831 and the aeration main pipe 843 to rotate to stir the wastewater inside the pretreatment tank 4 and the high-pressure oxygen-enriched tank 5 respectively. At the same time, oxygen-enriched air nanobubbles inside the aeration main pipe 843 are continuously discharged along the aeration micropores 845 below the aeration branch pipe 844, thereby mixing and degrading the wastewater inside the high-pressure oxygen-enriched tank.

[0063] During this process, the regulating mechanism 6 continuously drives the driving mechanism 7 to move up and down. The driving mechanism 7 drives the pretreatment sealing cover 81 and the high-pressure sealing cover 82 to move up and down. The bottoms of the pretreatment sealing cover 81 and the high-pressure sealing cover 82 are elastically squeezed against the top of the elastic pressure ring 15, thereby ensuring the sealing of the pretreatment tank 4 and the high-pressure oxygen-enriched tank 5. When the high-pressure sealing cover 82 moves up and down, it simultaneously drives the aeration main pipe 843 to move up and down. The aeration main pipe 843 drives multiple aeration branch pipes 844 to move up and down. The height of the oxygen-enriched air nanobubbles inside the aeration branch pipes 844 as they are discharged along the aeration micropores 845 changes continuously, thereby adjusting the degradation position of the sewage inside the high-pressure oxygen-enriched tank 5. This results in stronger adaptability, higher controllability, and better degradation effect.

[0064] Simultaneously, as the aeration main pipe 843 moves up and down, it also drives multiple aeration stirring screens 87 to move up and down. The aeration stirring screens 87 change their corresponding stirring position on the sewage inside the high-pressure oxygen-enriched tank 5, thereby improving the mixing and degradation effect on the internal sewage in conjunction with the oxygen-enriched air nanobubbles discharged from the aeration micropores 845. Furthermore, as the aeration main pipe 843 moves up and down, it also drives the filter plate 846 to move up and down. The filtration position of the filter plate 846 on the sewage inside the high-pressure oxygen-enriched tank 5 changes. As the sewage continuously enters the high-pressure oxygen-enriched tank 5 along the conveying pipe 11 and flows upward, the filter plate 846 drives multiple filter holes 847 to move up and down for filtration. This effectively improves the filtration effect of the filter holes 847 on impurities inside the sewage, preventing impurities from clogging the filter holes 847 and affecting subsequent sewage filtration.

[0065] When the high-pressure sealing cover 82 moves the aeration main pipe 843 upward, the internal space of the high-pressure oxygen-enriched tank 5 increases and the pressure decreases. At this time, under the negative pressure, the sewage drawn from the pretreatment tank 4 flows continuously along the drain valve 10 and the conveying pipe 11 to the bottom of the high-pressure oxygen-enriched tank 5. The sewage continues to rise and is fully mixed and degraded with the oxygen-enriched air nanobubbles under the filtration action of the filter holes 847, thus ensuring the sewage treatment effect. Afterward, when the high-pressure sealing cover 82 moves the aeration main pipe 843 downward, the internal space of the high-pressure negative pressure pipe 5 decreases and the pressure increases. Under the pressure, the degraded sewage is driven into the guide hose 12 along the sludge filter screen 13 to wait for subsequent treatment. During this process, the impurities filtered by the sludge filter screen 13 fall onto the filter plate 846 to wait for subsequent mixing and degradation with the oxygen-enriched air nanobubbles and continue to flow backward. This process uses the continuous up and down movement of the high-pressure sealing cover 82 to achieve unidirectional high-speed flow of sewage inside the high-pressure oxygen-enriched tank 5, improve the fluidity of sewage and degradation efficiency, and avoid sewage from standing for a long time and causing sedimentation, which reduces the degradation effect.

[0066] Meanwhile, the aeration micropores 845 continuously discharge oxygen-rich air nanobubbles downwards. These oxygen-rich air nanobubbles are positioned above the filter plate 846 and cavitate and break down impurities blocking the filter holes 847. That is, after the oxygen-rich air nanobubbles reach above the filter plate 846, they rupture and generate shock waves and instantaneous high pressure, impacting the filter screen surface and peeling off the attached substances. This achieves the breaking down and clearing of the blockage impurities inside the filter holes 847. At the same time, the up-and-down movement of the filter plate 846 itself enhances the clearing effect. Furthermore, the filter plate 846 is not rotated by multiple wedge blocks 8411 engaging with the limiting groove 51. Meanwhile, the main aeration pipe 843 drives multiple aeration branch pipes 844 to continuously rotate and change their positions above the filter plate 846. The rotation speed of the aeration branch pipes 844 corresponds to the gap between adjacent filter holes 847, further improving the uniform and thorough clearing of the blockage impurities inside the filter holes 847 by the oxygen-rich air nanobubbles discharged downwards from the aeration micropores 845.

[0067] However, as the aeration main pipe 843 moves up and down with multiple aeration branch pipes 844, the oxygen-enriched air nanobubbles discharged from the aeration micropores 845 have different volumes at different depths inside the high-pressure oxygen-enriched tank 5. Therefore, the shock waves generated when they undergo cavitation expansion and explosion are also different. Specifically, when the aeration main pipe 843 moves upward with multiple aeration branch pipes 844, the aeration main pipe 843 simultaneously moves the filter plate 846 upward. The distance between the aeration branch pipes 844 and the filter plate 846 remains unchanged. However, at this time, because the depth of the oxygen-enriched air nanobubbles discharged from the aeration micropores 845 inside the high-pressure oxygen-enriched tank 5 decreases, the volume of the oxygen-enriched air nanobubbles increases. When the oxygen-enriched air nanobubbles continuously flow downward and reach the top of the filter plate 846, the cavitation effect is enhanced and the generated shock waves are increased, which can easily cause damage to the structure of the filter plate 846.

[0068] During this process, the filter plate 846 synchronously drives the internal sector plate 849 to move upward. The sector plate 849 drives the wedge block 8411 at the end to move upward. The wedge extrusion force between the wedge block 8411 and the wedge surface 52 decreases. Under the elastic force of the reset block 8412, the sector plate 849 moves away from the aeration main pipe 843. The sector plate 849 drives multiple misaligned holes 8410 to move synchronously. The overlapping area of ​​the misaligned holes 8410 and the filter holes 847 increases, and the filtration diameter of the filter holes 847 increases. At this time, not only does the sliding scraping of the sector plate 849 improve the unblocking and clearing of impurities inside the filter holes 847, but the volume of the oxygen-rich air nanobubbles discharged downward by the aeration micropores 845 increases, and the shock wave generated under cavitation increases. This correspondingly improves the effect of breaking down and clearing impurities inside the filter holes 847, and avoids the filter holes 847 from becoming clogged and reducing the subsequent filtration effect when continuously filtering impurities in the sewage.

[0069] Similarly, when the high-pressure sealing cover 82 moves the aeration main pipe 843 downward, the aeration main pipe 843 simultaneously moves the aeration branch pipe 844 and the filter plate 846 downward. The wedge block 8411 engages with the wedge surface 52 and drives the fan-shaped plate 849 to press the reset block 8412 towards the end of the aeration main pipe 843. The fan-shaped plate 849 moves multiple misaligned holes 8410 and reduces the overlapping area with the filter hole 847, thus reducing the filtration diameter of the filter hole 847. At the same time, when the aeration branch pipe 844 moves downward, the oxygen-enriched air nanobubbles discharged downward by the aeration micropores 845 increase in depth inside the high-pressure oxygen-enriched tank 5. The volume of the oxygen-enriched air nanobubbles decreases, and the shock wave generated under cavitation decreases. The effect of this shock wave on breaking and clearing impurities blocked inside the filter hole 847 is weakened, thereby avoiding damage to the filter plate 846 structure caused by a large cavitation shock wave.

[0070] When it is necessary to increase the filtration diameter of different impurities in the sewage inside the high-pressure oxygen-enriched tank 5, the high-pressure sealing cover 82 drives the filter plate 846 to move upward a greater distance. Under the elastic force of the reset block 8412, the sector plate 849 moves further away from the aeration main pipe 843. The sector plate 849 drives the misaligned hole 8410 to move a greater distance and the overlapping area with the filter hole 847 increases. The filtration diameter of the filter hole 847 increases, thereby effectively adjusting the filtration diameter of the filter hole 847 for impurities in the sewage and meeting the filtration and degradation effects for different sewage.

[0071] The above process is repeated continuously to mix and degrade the subsequent wastewater. After degradation is complete, the high-pressure sealing cover 82 moves upward and disengages from the sealing and squeezing of the elastic pressure ring 15. Simultaneously, the high-pressure sealing cover 82 drives the filter plate 846 to move upward and disengage from the high-pressure oxygen-enriched tank 5. The periphery of the filter plate 846 and the inner wall of the high-pressure oxygen-enriched tank 5 are continuously scraped and cleaned. Impurities at the end of the sludge filter screen 13 fall above the filter plate 846 and are discharged upward, thereby effectively cleaning the inner wall of the high-pressure oxygen-enriched tank 5 and avoiding pollution to the mixing and degradation of subsequent wastewater. Then, the sludge discharge valve 14 is opened, and larger impurities at the bottom of the high-pressure oxygen-enriched tank 5 are discharged along the sludge discharge valve 14 for subsequent treatment.

[0072] The scope of protection of this application does not involve improvements to the electronic components of the device or equipment. Therefore, the working principles of each electronic component are not described in detail here. The electronic components in this application are all conventional electronic components used in the prior art. They are all conventional technical means in the prior art, and the application of the prior art is very mature. Therefore, they will not be elaborated here.

[0073] Of course, the present invention may have many other embodiments. Based on this embodiment, other embodiments obtained by those skilled in the art without any creative effort are all within the scope of protection of the present invention.

Claims

1. A wastewater treatment system employing pressurized MBR and oxygen-enriched air nanobubbles, characterized in that, Includes a base frame (1), with a pretreatment tank (4) and a high-pressure oxygen-enriched tank (5) respectively on the top two sides of the base frame (1), an adjustment mechanism (6) on the back of the base frame (1), a drive mechanism (7) on the top of the adjustment mechanism (6), and an aeration and stirring mechanism (8) on the bottom of the drive mechanism (7). The aeration and stirring mechanism (8) includes a pretreatment sealing cover (81) and a high-pressure sealing cover (82). A stirring module (83) is movably installed at the bottom of the pretreatment sealing cover (81) for stirring and mixing wastewater with pretreatment agents. An aeration module (84) is movably connected at the bottom of the high-pressure sealing cover (82) for filtering and degrading wastewater with oxygen-rich air nanobubbles. The aeration module (84) includes an aeration main pipe (843), and aeration branch pipes (844) are arranged in a ring at equal intervals at the bottom of the aeration main pipe (843). A filter plate (846) is rotatably connected to the outer surface of the aeration main pipe (843) and below the aeration branch pipes (844) through a bearing ring (848). A fan-shaped plate (849) is slidably connected inside the filter plate (846). The aeration main pipe (843) moves up and down, causing the fan-shaped plate (849) to move up and down and adjust the filtration diameter.

2. The wastewater treatment system employing pressurized MBR and oxygen-enriched air nanobubbles according to claim 1, characterized in that, The back side of the base frame (1) is equipped with an ozone micro-nano bubble integrated machine (9). The bottom of the pretreatment tank (4) is equipped with a sewage discharge check valve (10). The other end of the sewage discharge check valve (10) is connected to the inside of the high-pressure oxygen-enriched tank (5) through the conveying pipe (11). The other end of the high-pressure oxygen-enriched tank (5) is connected to a guide hose (12) through a recovery check valve (16). The other end of the guide hose (12) is connected to a membrane bioreactor (2). The input end of the guide hose (12) is equipped with a sludge filter screen (13). The pretreatment sealing cover (81) and the high-pressure sealing cover (82) are both fixedly installed at the bottom of the drive mechanism (7).

3. The wastewater treatment system employing pressurized MBR and oxygen-enriched air nanobubbles according to claim 1, characterized in that, The adjustment mechanism (6) includes a rail frame (61), which is fixedly installed on the back of the base frame (1). A first motor (62) is provided at the bottom of the rail frame (61). The output end of the first motor (62) passes through the rail frame (61) and is provided with a lead screw (63). The lead screw (63) is rotatably connected to the inside of the rail frame (61). A slider (64) is threadedly connected to the outer surface of the lead screw (63). The slider (64) is slidably connected to the inside of the rail frame (61). A bracket (65) is provided at the top of the slider (64). A top plate (66) is provided at the top of the bracket (65). The drive mechanism (7) is fixedly installed at the bottom front end of the top plate (66).

4. The wastewater treatment system employing pressurized MBR and oxygen-enriched air nanobubbles according to claim 1, characterized in that, A sewage inlet valve (85) is provided on one side of the top front end of the pretreatment sealing cover (81). A sewage inlet pipe is provided at the input end of the sewage inlet valve (85). A pressure regulating valve (88) is provided in the middle of the top front end of the high-pressure sealing cover (82). An ozone discharge pipe (86) is provided at the output end of the pressure regulating valve (88). A waste gas treatment equipment connection flange is provided at the output end of the ozone discharge pipe (86). An elastic pressure ring (15) is provided on the top of both the pretreatment tank (4) and the high-pressure oxygen enrichment tank (5). The top of the elastic pressure ring (15) is sealed to the bottom of the pretreatment sealing cover (81) and the high-pressure sealing cover (82).

5. The wastewater treatment system employing pressurized MBR and oxygen-enriched air nanobubbles according to claim 3, characterized in that, The drive mechanism (7) includes a concave frame (71), a driven gear ring (72), and a connecting frame (73). The concave frame (71) is fixedly installed at the front end of the top plate (66). The pretreatment sealing cover (81) and the high pressure sealing cover (82) are fixedly installed on the bottom sides of the concave frame (71). The bottom sides of the connecting frame (73) are rotatably connected to driven gears (74). The bottom middle of the connecting frame (73) is rotatably connected to a drive gear (75). The top middle of the connecting frame (73) is provided with a second motor (76).

6. The wastewater treatment system employing pressurized MBR and oxygen-enriched air nanobubbles according to claim 5, characterized in that, The output end of the second motor (76) is connected to the top of the drive gear (75). The drive gear (75) and the driven gear (74) are meshed. The bottom of the driven gear (74) is rotatably connected to the inner top of the pretreatment sealing cover (81) and the high-pressure sealing cover (82). The driven gear ring (72) is rotatably connected to the middle of the top of the pretreatment sealing cover (81) and the high-pressure sealing cover (82). The top of the stirring module (83) and the aeration module (84) are connected to the driven gear ring (72). The driven gear ring (72) and the driven gear (74) are meshed.

7. The wastewater treatment system employing pressurized MBR and oxygen-enriched air nanobubbles according to claim 5, characterized in that, The stirring module (83) includes a rotating shaft (831), which is rotatably connected to the middle of the pretreatment sealing cover (81). The upper end of the rotating shaft (831) is connected to the bottom of the driven toothed ring (72) located on the top of the pretreatment sealing cover (81) through a sealing coupling. The outer surface of the rotating shaft (831) is provided with stirring plates (832) arranged in a ring at equal intervals. The bottom of the rotating shaft (831) and the bottom of the aeration main pipe (843) are both provided with stirring augers (833). The outer surface of the stirring augers (833) is respectively attached to the inner wall of the bottom of the pretreatment tank (4) and the high-pressure oxygen enrichment tank (5).

8. The wastewater treatment system employing pressurized MBR and oxygen-enriched air nanobubbles according to claim 5, characterized in that, The aeration module (84) also includes a rotary joint (841), which is rotatably connected to the top center of the high-pressure sealing cover (82). The driven toothed ring (72) on the top of the high-pressure sealing cover (82) is fixedly installed on the outside of the rotary joint (841). A connecting hose (842) is rotatably connected to the top of the rotary joint (841). The input end of the connecting hose (842) is connected to the output end of the ozone micro-nano bubble integrated machine (9). 1) The bottom of the aeration main pipe (843) is connected to the top of the aeration main pipe (843). The bottom of the aeration branch pipe (844) is provided with aeration micro-holes (845) at equal intervals. The outer surface of the aeration main pipe (843) is provided with aeration stirring mesh plates (87) arranged in a ring at equal intervals. The lower ends of the pretreatment tank (4) and the high-pressure oxygen-enriched tank (5) are both set in a conical shape. The lower end of the stirring auger (833) is set in a conical shape. The bottom output end of the high-pressure oxygen-enriched tank (5) is provided with a sludge discharge valve (14).

9. The wastewater treatment system employing pressurized MBR and oxygen-enriched air nanobubbles according to claim 2, characterized in that, A negative pressure treatment mechanism (3) is provided on the outside of the membrane bioreactor (2). The negative pressure treatment mechanism (3) includes a negative pressure tank (31). The negative pressure tank (31) is fixedly installed on the side of the membrane bioreactor (2) away from the base frame (1). A vacuum negative pressure pump (32) is provided on the upper outside of the negative pressure tank (31). The input end of the vacuum negative pressure pump (32) is connected to the inside of the negative pressure tank (31). The input end of the negative pressure tank (31) is connected to the output end of the membrane bioreactor (2). A drain valve (33) is provided at the bottom of the negative pressure tank (31).

10. The wastewater treatment system employing pressurized MBR and oxygen-enriched air nanobubbles according to claim 1, characterized in that, The filter plate (846) has an annular cavity (8414) on its peripheral side. A fan-shaped plate (849) is slidably connected inside the annular cavity (8414). The filter plate (846) has a plurality of filter holes (847) evenly distributed inside. The fan-shaped plate (849) has a plurality of staggered holes (8410) evenly distributed inside. The staggered holes (8410) are staggered with the filter holes (847). A reset block (8412) is provided at the end of the fan-shaped plate (849) near the aeration main pipe (843). The other end of the reset block (8412) has a reset block (8412) at the other end of the fan-shaped plate (849). One end is fixedly connected to the side wall of the annular cavity (8414), and sealing strips (8413) are provided on both sides of the fan-shaped plate (849). Multiple limiting grooves (51) are evenly opened inside the high-pressure oxygen-enriched tank (5). A wedge-shaped surface (52) is opened on the inner wall of the limiting groove (51). A wedge block (8411) is slidably connected inside the limiting groove (51). The other end of the wedge block (8411) is fixedly connected to the side wall of the fan-shaped plate (849), and the wedge block (8411) and the wedge surface (52) are slidably connected.

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