Sewage treatment system using nanoscale ceramic membranes to produce air flotation without dissolved air

Abstract

This invention discloses a wastewater treatment system that utilizes a nano-scale ceramic membrane to generate dissolved gas-free flotation, relating to the field of wastewater treatment technology. The system includes a wastewater treatment device and further comprises: an exhaust assembly disposed inside the wastewater treatment device, comprising an exhaust pipe and a ceramic membrane; a cross-flow assembly connected to the bottom of the exhaust pipe via a transmission assembly, comprising a rotating rod and a stirring plate; a drainage assembly disposed at the bottom of the transmission assembly, comprising blades and a gate; and an adjustment assembly disposed at the bottom of the cross-flow assembly, comprising a guide groove. By employing a nano-scale ceramic membrane in conjunction with gas to form nanobubbles in the wastewater, the system ensures that the formed nanobubbles are more uniform, guaranteeing that the subsequent nanobubbles and an appropriate amount of wastewater can be fully mixed for treatment, further improving the flotation effect and efficiency. It also exhibits stronger adaptability to changes in wastewater concentration. When the detection device detects that the wastewater concentration exceeds the standard, it stops the wastewater from entering the bubble mixing chamber.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a wastewater treatment system that utilizes nanoscale ceramic membranes to generate dissolved gas-free flotation. Background Technology

[0002] Wastewater treatment technologies primarily utilize physical, chemical, and biological methods to remove suspended solids, organic matter, and nutrients from wastewater to meet discharge standards. Air flotation is a commonly used solid-liquid separation method. Its principle involves introducing a large number of microbubbles into the wastewater, causing suspended solids to adhere to the bubbles and form scum. This scum is then removed by a scraping mechanism, thus purifying the wastewater. In nanomaterials technology, nanoscale ceramic membranes are a novel type of filter material with excellent chemical and thermal stability, effectively separating gases and liquids. Micro- and nanobubbles, with diameters in the micrometer and nanometer ranges, possess advantages such as large specific surface area, slow rise velocity, high solubility, and high mass transfer efficiency, and are widely used in environmental protection, chemical engineering, and biomedicine.

[0003] Chinese patent CN106145232A discloses a dissolved air flotation device for sewage treatment. A pressure pump is installed at the end of the sewage inlet pipe, and a reagent inlet is provided on the sewage inlet pipe. The pressure pump is connected to a pressure dissolved air tank through a sewage delivery pipe with an air release device. The pressure dissolved air tank is connected to the flotation tank through a dissolved air sewage pipe.

[0004] Chinese Patent CN110950414A discloses a high-efficiency air flotation device for wastewater treatment. The feeding device includes an anion flocculant tank and a cationic flocculant tank. The cationic flocculant in the cationic flocculant tank flows into a first-stage vortex mixer, and the anionic flocculant in the anion flocculant tank flows into a second-stage vortex mixer.

[0005] The above-mentioned technical solutions have some problems in use. Traditional air flotation technology usually pressurizes water to generate a large number of tiny bubbles. However, the bubbles are not uniform enough, which often causes them to agglomerate during the air flotation process, thus limiting its effectiveness in practical applications.

[0006] In practical applications, gas can pass through the ceramic membrane to form uniform nanobubbles. However, the existing gas penetration process of the ceramic membrane is relatively slow and it is not easy to detach from the ceramic membrane surface, resulting in poor adsorption efficiency of the formed bubbles and wastewater.

[0007] In the wastewater treatment process, the concentration of wastewater entering the treatment tank varies randomly. Existing air flotation technology usually treats wastewater with the same method regardless of the concentration or pollutants, which limits its effectiveness in practical applications, resulting in poor wastewater treatment effect and slow treatment efficiency.

[0008] However, if the wastewater concentration becomes too high due to errors in the flocculation stage of the wastewater during use, and the air flotation structure continues to operate, it will cause bubbles to be generated and deposited in large quantities. In some cases, high-concentration wastewater may even block the generation of nanobubbles, resulting in the wastewater not being treated in time and damaging the wastewater treatment device.

[0009] Therefore, it is necessary to invent a wastewater treatment system that utilizes nanoscale ceramic membranes to generate dissolved air flotation to solve the above problems. Summary of the Invention

[0010] The purpose of this invention is to provide a wastewater treatment system that utilizes nanoscale ceramic membranes to generate dissolved gas-free flotation, thereby solving the problems mentioned in the background art.

[0011] To achieve the above objectives, the present invention provides the following technical solution: a wastewater treatment system utilizing nanoscale ceramic membranes to generate dissolved gas-free flotation, comprising a wastewater treatment device, and further comprising:

[0012] The exhaust assembly, which is installed inside the wastewater treatment device, includes an exhaust pipe and a ceramic membrane. As the concentration of wastewater increases, the rotation speed of the exhaust pipe increases, and more gas passes through the ceramic membrane under the action of centrifugal force to form bubbles.

[0013] The cross-flow component is connected to the bottom of the vent pipe via a transmission component. It includes a rotating rod and a stirring plate, which are used to rotate in the opposite direction to the vent pipe to form cross-flow and promote the bubbles to detach from the surface of the ceramic membrane.

[0014] The drainage component, located at the bottom of the transmission component, includes blades and a gate. As the rotational speed of the vent pipe increases, the range of blade movement increases, causing the gate to rise more significantly.

[0015] An adjustment component, located at the bottom of the crossflow component, includes a guide groove and a slot for limiting the rotation of the rotating rod. A throttling component is provided inside the guide groove.

[0016] Preferably, the wastewater treatment device includes:

[0017] A treatment tank, which is connected to the outside world through pipelines, is used to treat sewage inside its interior;

[0018] The flocculation mixing chamber is located inside the treatment tank and is used to connect the sewage and flocculant, and to make the sewage and flocculant fully mixed under the stirring plate to form flocs;

[0019] The bubble mixing chamber is located inside the treatment tank and downstream of the flocculation mixing chamber. It is used to connect to the flocculation mixing chamber so that the wastewater containing flocculant is mixed with bubbles before being discharged.

[0020] Preferably, the wastewater treatment device further includes:

[0021] The air flotation separation chamber is located inside the treatment tank and downstream of the bubble mixing chamber. It is used to connect to the bubble mixing chamber so that the bubbles in the wastewater carry flocs to the surface to form scum.

[0022] The scum separation chamber is located inside the treatment tank and downstream of the flotation separation chamber. It has a solid recovery mechanism and a liquid recovery mechanism on its side. The solid recovery mechanism is used to collect and discharge the scum on the surface of the sewage, and the treated liquid is collected and discharged after being discharged by the liquid recovery mechanism.

[0023] Preferably, the exhaust assembly further includes:

[0024] The power source is fixedly installed inside the bubble mixing chamber, and its output end is fixedly installed on the outside of the vent pipe to drive the vent pipe to rotate, so that the nanobubbles detach from the surface of the ceramic membrane.

[0025] The top of the vent pipe is rotatably connected to the output end of the air inlet device, and the bottom of the vent pipe is fixedly installed with the ceramic membrane.

[0026] Preferably, the transmission assembly includes:

[0027] The transmission wheel assembly has its input end slidably connected to the bottom of the ventilator, which is used to conduct the rotation of the ventilator and output in the opposite direction, and transmit the rotation downwards;

[0028] The transmission disc is fixedly installed at its bottom to the output end of the transmission wheel assembly. The rotation of the vent pipe drives the transmission disc to rotate in the opposite direction through the transmission wheel assembly, which in turn drives the cross-flow assembly to rotate in the opposite direction to form cross-flow.

[0029] Preferably, the cross-flow component further includes:

[0030] The elastic element has one end fixedly connected to the side of the transmission disc and the other end fixedly connected to the side of the rotating rod.

[0031] The side of the rotating rod is fixedly connected to the side of the stirring plate, and is used to rotate the stirring plate to form crossflow. The outer side of the stirring plate is provided with an inclined surface, which is used to contact the drainage component and push the rotating rod and the stirring plate to move, so as to adjust the rotation amplitude. The inner side of the stirring plate is fixedly connected with an inclined plate, which is used to push the vent pipe to rise, so that the vent pipe drives the power source to be misaligned and cut off the power output.

[0032] Preferably, the drainage assembly further includes:

[0033] The adjusting rod has one end fixedly connected to the bottom of the transmission wheel assembly via a connecting rod, and the other end is rotatably connected to a movable part. The output end of the movable part is hinged to one end of the blade, which is used to convert the rotation of the adjusting rod into the movement of the blade.

[0034] The gate is slidably connected at the exhaust port of the bubble mixing chamber. An inclined block is fixedly connected to the top side of the gate, which is used for the blades to cooperate with the water flow to impact the gate, so that the gate drives the inclined block to move upward and push the rotating rod to move.

[0035] Preferably, the adjustment component further includes:

[0036] A fixed cylinder is rotatably connected to the transmission disc inside the bubble mixing chamber, and a transmission wheel set is installed inside it. The top of the fixed cylinder supports the rotation of the rotating rod, and the interior of the fixed cylinder supports the movement of the movable part.

[0037] The guide groove is located on the top of the fixed cylinder, and multiple sets of guide groove arrays are provided. The guide groove has an adjustment groove near the inclined block, and the innermost side of the adjustment groove has a locking groove, which is used to limit and guide the rotation and movement of the rotating rod and to stop the rotation.

[0038] Preferably, the throttling component includes:

[0039] The air chamber is located inside the fixed cylinder, inside the guide groove. A rubber block is sealed and slidable on its outside. Multiple sets of rubber blocks are arranged in an array around the air chamber. When the rotating rod is adjusted to the inner guide groove, the rotating rod squeezes the rubber block into the air chamber, thereby forcing the gas in the air chamber outward. As the amount of movement of the rotating rod into the air chamber increases and the squeezing force on the rubber block increases, the amount of gas forced outward from the air chamber increases.

[0040] The gas guide tube, whose inlet end is connected to the gas chamber, is used to conduct the gas compressed inside the gas chamber.

[0041] Preferably, the throttling component further includes:

[0042] The telescopic component, whose bottom is connected to the output end of the air chamber, is used to move in conjunction with the gas guided by the air pipe;

[0043] A baffle is fixedly connected at its bottom to the telescopic end of the telescopic component. It is slidably connected at the inlet of the bubble mixing chamber. The telescopic end of the telescopic component pushes the baffle to move, thereby adjusting the sewage flow rate at the inlet of the bubble mixing chamber. A detection device is fixedly installed at the inlet of the bubble mixing chamber.

[0044] The technical effects and advantages of this invention are as follows:

[0045] 1. This invention uses a nano-scale ceramic membrane in conjunction with gas to form nanobubbles in wastewater, which makes the formed nanobubbles more uniform, avoids nanobubble aggregation to a certain extent, and better ensures the flotation effect and flotation efficiency.

[0046] 2. This invention uses a rotating rod in conjunction with a stirring plate and a vent pipe to rotate in opposite directions, thereby forming a crossflow. This crossflow cleans the surface of the ceramic membrane, and the reverse shear force of the crossflow better ensures that the nanobubbles detach from the ceramic membrane surface. Furthermore, the rotation speed increases with the concentration of the wastewater entering the membrane, making it more adaptable to changes in wastewater concentration or pollutants.

[0047] 3. As the concentration of wastewater entering the bubble mixing chamber increases, the rotation speed of the power source driving the air pipe and cross-flow component gradually increases, which can produce more bubbles to be discharged. This allows the rotating rod and stirring plate to approach the ceramic filter membrane under the push of the inclined plate for better cross-flow, ensuring that the increased number of nanobubbles detach from the ceramic membrane surface. This adapts to the cleaning of the ceramic membrane surface by high-concentration wastewater. At higher concentrations, the squeeze block expels the gas inside the air chamber, thereby pushing the baffle part to move upward to block the wastewater, so as to ensure that the subsequent nanobubbles and an appropriate amount of wastewater can be fully mixed for treatment, further improving the flotation effect.

[0048] 4. When the detection device detects that the sewage concentration exceeds the standard, the slot limits and locks the rotating rod. At this time, the rotating rod stops the air pipe in the opposite direction through the transmission component. At the same time, when the inclined plate on the inner side of the stirring plate moves inward, it pushes the bottom of the air pipe to move upward, so that the power source is misaligned to avoid damage to the power source, and stops sewage from entering the bubble mixing chamber, thereby ensuring the sewage treatment effect and avoiding the device from being blocked or damaged. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0050] Figure 2 This is a schematic diagram of the wastewater treatment device of the present invention;

[0051] Figure 3 This is a schematic diagram of the treatment pool structure of the present invention;

[0052] Figure 4 This is a schematic diagram of the bubble mixing chamber structure of the present invention;

[0053] Figure 5 This is a schematic diagram of the exhaust assembly structure of the present invention;

[0054] Figure 6 This is a schematic diagram of the crossflow component structure of the present invention;

[0055] Figure 7 This is a schematic cross-sectional view of the bubble mixing chamber of the present invention;

[0056] Figure 8 This is a schematic diagram of the throttling component structure of the present invention;

[0057] Figure 9 For the present invention Figure 7A magnified structural diagram of section A;

[0058] Figure 10 For the present invention Figure 8 A schematic diagram of the enlarged structure at point B;

[0059] Figure 11 This is a schematic diagram of the card slot position structure of the present invention.

[0060] In the diagram: 1. Wastewater treatment device; 101. Treatment tank; 102. Flocculation mixing chamber; 103. Bubble mixing chamber; 104. Air flotation separation chamber; 105. Sludge scraping separation chamber; 106. Solid recovery mechanism; 107. Liquid recovery mechanism; 2. Air intake device; 3. Exhaust assembly; 301. Vent pipe; 302. Ceramic membrane; 303. Power source; 4. Transmission assembly; 401. Transmission wheel set; 402. Transmission disc; 5. Crossflow assembly; 501. Elastic element; 502. Rotary element. 503. Moving rod; 504. Stirring plate; 505. Inclined surface; 6. Drainage assembly; 601. Connecting rod; 602. Adjusting rod; 603. Moving part; 604. Blade; 605. Gate plate; 606. Inclined block; 7. Adjusting assembly; 701. Fixed cylinder; 702. Guide groove; 703. Adjusting groove; 704. Slot; 8. Throttling assembly; 801. Air chamber; 802. Rubber block; 803. Air guide pipe; 804. Telescopic component; 805. Baffle; 9. Detection device. Detailed Implementation

[0061] 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.

[0062] This invention provides, for example Figures 1 to 11 The wastewater treatment system shown utilizes nanoscale ceramic membranes to generate dissolved air flotation, comprising:

[0063] Wastewater treatment device 1 includes: a treatment tank 101, which is connected to the outside via pipeline, for treating wastewater within it; a flocculation mixing chamber 102, located inside the treatment tank 101 and downstream of the flocculation mixing chamber 102, for connecting wastewater and flocculant, and for ensuring thorough mixing of wastewater and flocculant under the stirring plate 503 to form flocs; and an air bubble mixing chamber 103, located inside the treatment tank 101 and downstream of the flocculation mixing chamber 102, for connecting to the flocculation mixing chamber 102, allowing wastewater mixed with flocculant to mix with air bubbles before discharge for rapid flotation treatment. This ensures thorough mixing of flocculant, wastewater, and air bubbles before flotation treatment, resulting in faster mixing and improved efficiency. The treatment efficiency is improved; the flotation separation chamber 104 is located inside the treatment tank 101 and downstream of the bubble mixing chamber 103, and is used to connect to the bubble mixing chamber 103, so that the bubbles in the sewage carry the flocs to the surface to form scum; the scum separation chamber 105 is located inside the treatment tank 101 and downstream of the flotation separation chamber 104, and is provided with a solid recovery mechanism 106 and a liquid recovery mechanism 107 on its side, which are used to collect and discharge the scum on the surface of the sewage in the solid recovery mechanism 106, and the treated liquid is collected and discharged in the liquid recovery mechanism 107, thereby completing the preliminary treatment of sewage and returning the treated sewage to the next process for further treatment.

[0064] The exhaust assembly 3, located inside the wastewater treatment device 1, includes an exhaust pipe 301 and a ceramic membrane 302. As the wastewater concentration increases, the rotation speed of the exhaust pipe 301 increases, allowing more bubbles to pass through the ceramic membrane 302 under centrifugal force. The power source 303, fixedly installed inside the bubble mixing chamber 103, has its output end fixedly installed on the outside of the exhaust pipe 301 to drive the exhaust pipe 301 to rotate, allowing the nanobubbles to better detach from the surface of the ceramic membrane 302 and better penetrate the ceramic membrane 302 under centrifugal force. The top of the exhaust pipe 301 is rotatably connected to the output end of the air inlet device 2, and the bottom of the exhaust pipe 301 is fixedly installed on the ceramic membrane 302 to better prevent the nanobubbles from agglomerating.

[0065] The transmission assembly 4 includes: a transmission wheel set 401, whose input end is slidably connected to the bottom of the vent pipe 301, used to fix and conduct the rotation of the vent pipe 301, while avoiding obstructing the upward displacement process of the vent pipe 301, and outputting the rotation in the opposite direction, and transmitting the rotation downward; the transmission wheel set 401 is composed of a transmission rod and a planetary gear set, the central gear of the planetary gear set is slidably connected to the bottom of the vent pipe 301 through the transmission rod, the vent pipe 301 rotates and slides up and down on the top of the transmission rod, the two sets of gears on the side of the central gear are rotatably connected inside the fixed cylinder 701, and can only rotate on their own, so that the inner gears on the outer side of the two sets of gears rotate, and the two sets of gears and the inner gear rotate in the same direction, and the inner gear and the central gear rotate in the same direction but opposite direction; a transmission disc 402, whose bottom is fixedly installed to the output end of the transmission wheel set 401, under the reverse rotation transmitted from the transmission wheel set 401, the transmission disc 402 can rotate stably in the opposite direction, so as to drive the cross-flow assembly 5 to rotate in the opposite direction to form cross-flow.

[0066] The cross-flow assembly 5, which is connected to the bottom of the vent pipe 301 via the transmission assembly 4, includes a rotating rod 502 and a stirring plate 503. It rotates in the opposite direction to the vent pipe 301 to create cross-flow, causing a large number of bubbles to detach from the surface of the ceramic membrane 302 and cleaning the surface of the ceramic membrane 302. As the concentration of the incoming wastewater increases, the number of bubbles increases, and the faster cross-flow allows the bubbles to detach from the ceramic membrane 302 more effectively, preventing the increasingly concentrated wastewater from clogging the pores of the ceramic membrane 302. The elastic element 501 has one end fixedly connected to the side of the transmission disc 402, and the other end connected to the rotating rod 502. The side of the rotating rod 502 is fixedly connected to ensure the stability of the rotating rod 502 during the adjustment of the rotation amplitude. The side of the rotating rod 502 is fixedly connected to the side of the stirring plate 503, so that the rotating rod 502 drives the stirring plate 503 to rotate and form crossflow. The outer side of the stirring plate 503 is provided with an inclined surface 504, which is used to contact the drainage component 6 to push the rotating rod 502 and the stirring plate 503 to move, so as to adjust the rotation amplitude. The inner side of the stirring plate 503 is fixedly connected with an inclined plate 505, which is used to push the vent pipe 301 to rise, so that the vent pipe 301 drives the power source 303 to be misaligned and cut off the power output.

[0067] The drainage component 6, located at the bottom of the transmission component 4, includes a blade 604 and a gate 605. When the vent pipe 301 rotates, the blade 604 moves, simultaneously pushing the wastewater mixed with nanobubbles to impact and open the gate 605. As the rotational speed of the vent pipe 301 increases, the range of movement of the blade 604 increases, causing the gate 605 to rise more significantly, resulting in the discharge of a large amount of wastewater mixed with nanobubbles. The adjusting rod 602 has one end fixedly connected to the bottom of the transmission wheel assembly 401 via a connecting rod 601, and its other end rotatably connected to a movable part 603. The output end of the movable part 603 is hinged to one end of the blade 604, converting the rotation of the adjusting rod 602 into the movement of the blade 604. When the blade 604 moves forward, in… The backward resistance of the wastewater increases the tilt angle between the blade 604 and the horizontal plane. When the blade 604 moves backward, the forward resistance of the wastewater decreases the tilt angle between the blade 604 and the horizontal plane, ensuring that the wastewater mixed with nanobubbles enters the flotation separation chamber 104 better. The gate 605 is slidably connected at the exhaust port of the bubble mixing chamber 103. An inclined block 606 is fixedly connected to the top side of the gate 605, which is used for the blade 604 to cooperate with the water flow to impact the gate 605, so that the gate 605 drives the inclined block 606 to move upward and push the rotating rod 502 to move. As the concentration of the wastewater increases, the blade 604 pushes more wastewater to move faster and impact the gate 605, so that the blade 604 cooperates with the wastewater to increase the upward amplitude of the gate 605.

[0068] Adjustment component 7, located at the bottom of crossflow component 5, includes guide groove 702 and slot 704 to restrict the rotation of rotating rod 502. A throttling component 8 is located inside guide groove 702. As gate 605 rises, the amplitude increases, causing gate 605 to push agitator 503 and rotating rod 502 to gradually rotate along the inner guide groove 702. The agitator 503 and rotating rod 502, being closer to vent pipe 301, can better accommodate increased air bubbles, allowing them to better detach from ceramic membrane 302 and preventing high-concentration wastewater from clogging the pores of ceramic membrane 302. When agitator 503 and rotating rod 502 move to the inner side of guide groove 702, rotating rod 502... 02. The throttling assembly 8 is used to reduce the amount of wastewater entering; a fixed cylinder 701 is disposed inside the bubble mixing chamber 103 and rotatably connected to the transmission disc 402, and a transmission wheel set 401 is installed inside it, which supports the rotation of the rotating rod 502 at the top of the fixed cylinder 701, and supports the movement of the movable part 603 inside the fixed cylinder 701; a guide groove 702 is opened at the top of the fixed cylinder 701, and multiple sets of guide grooves 702 are arranged in an array, and an adjustment groove 703 is opened near the inclined block 606 in the guide groove 702, and a slot 704 is opened on the innermost side of the adjustment groove 703, which is used to limit and guide the rotation and movement of the rotating rod 502 and to stop the rotation.

[0069] The throttling assembly 8 includes: an air chamber 801, which is located inside the fixed cylinder 701 and inside the guide groove 702. A rubber block 802 is slidably sealed on the outside of the air chamber 801. Multiple sets of rubber blocks 802 are arranged in an array around the air chamber 801. When the rotating rod 502 is adjusted to the innermost guide groove 702, the rotating rod 502 squeezes the rubber block 802 into the air chamber 801, thereby forcing the gas inside the air chamber 801 outwards. When the rotating rod 502 moves into the slot 704, the amount of movement of the rotating rod 502 into the air chamber 801 increases, and it also presses against the rubber block 802, causing a large amount of gas inside the air chamber 801 to be forced outwards; a gas guide pipe 803, whose inlet end is connected to the air chamber 801, for conducting the gas pressed out from inside the air chamber 801; and a telescopic member 804, whose bottom is connected to the gas inlet of the air chamber 801. The outlet is connected to facilitate the movement of gas guided by the air guide pipe 803; the baffle 805, whose bottom is fixedly connected to the telescopic end of the telescopic member 804, is slidably connected at the inlet position of the bubble mixing chamber 103, and is used by the telescopic end of the telescopic member 804 to push the baffle 805 to move. As the rotating rod 502 moves, it can quickly compress different rubber blocks 802, so that the telescopic member 804 pushes the baffle 805 to maintain a certain position, thereby limiting the sewage flow at the inlet of the bubble mixing chamber 103. A detection device 9 is fixedly installed at the inlet position of the bubble mixing chamber 103. The detection device 9 continuously detects the concentration of sewage entering the bubble mixing chamber 103, thereby controlling the output power of the power source 303 to adopt different treatment methods.

[0070] In use, wastewater and flocculant are first discharged into the flocculation mixing chamber 102 through the side inlet of the treatment tank 101. In the flocculation mixing chamber 102, the mixture is stirred by the stirring device to ensure that the wastewater and flocculant are fully mixed. The suspended solids in the wastewater can be effectively aggregated to form flocs. The wastewater and flocculant mixture is detected by the detection device 9 at the inlet position on the inner wall of the bubble mixing chamber 103. Then, it enters the bubble mixing chamber 103 for treatment. At this time, the air intake device 2 delivers external air into the air pipe 301 and forms nanobubbles that penetrate the ceramic membrane 302 at the bottom of the air pipe 301 and are mixed into the wastewater. This avoids the agglomeration of nanobubbles to a certain extent, thereby better ensuring the subsequent air flotation effect. This allows the bubbles, flocculant and wastewater to mix quickly, improving the treatment efficiency.

[0071] A power source 303, consisting of a motor and a gear set, drives a vent pipe 301 fixed at the output end of the gear set to rotate. Due to the rotation of the vent pipe 301 and the ceramic membrane 302, the gas inside the vent pipe 301, under centrifugal force, better penetrates the ceramic membrane 302 and detaches from its surface. Simultaneously, a transmission gear set 401, consisting of a transmission rod and a planetary gear set, drives the transmission rod fixed at its bottom to rotate when the vent pipe 301 rotates. This causes the transmission rod to drive the central gear of the planetary gear set to rotate, which in turn drives two sets of gears meshing on the sides to rotate in opposite directions. These two sets of gears are rotatably mounted inside a fixed cylinder 701, allowing the two sets of gears to rotate in opposite directions. While rotating independently, the internal gears meshing on the sides rotate, and the internal gears rotate in the same direction as the two sets of gears. Inside the fixed cylinder 701, the internal gears drive the transmission disc 402 to rotate. At this time, the transmission disc 402 drives the rotating rod 502 and the stirring plate 503 to rotate around the vent pipe 301 along the guide groove 702 at the top of the fixed cylinder 701 through the elastic element 501. During the rotation, the rotating rod 502 and the stirring plate 503 rotate in opposite directions to the vent pipe 301, thus forming a crossflow. This crossflow can flush and clean the ceramic membrane 302 installed on the bottom side of the vent pipe 301. At the same time, the reverse shear force of the crossflow can better ensure that the nanobubbles detach from the surface of the ceramic membrane 302.

[0072] Simultaneously, during the rotation of the transmission wheel assembly 401, it drives the connecting rod 601 fixed at the bottom to rotate, thereby causing the connecting rod 601 to drive the adjusting rod 602 to rotate around its fixed end. The movable part 603, composed of a sliding rod, a slider, and a slide rail, allows the other end of the adjusting rod 602 to drive the sliding rod to rotate, causing the slider to reciprocate along the slide rail. This causes the slider to drive the blade 604, which is hinged to the side, to reciprocate. When the blade 604 moves forward, the tilt angle between the blade 604 and the horizontal plane increases due to the backward resistance of the sewage, at which point the blade 604 unfolds. It can propel more wastewater mixed with nanobubbles forward, and the advancing wastewater, together with the blades 604, impacts the gate 605, causing the gate 605, which is set at the bottom slope, to move upward along the inner wall of the bubble mixing chamber 103. This allows the wastewater mixed with nanobubbles to enter the flotation separation chamber 104 for flotation treatment. When the blades 604 retract, the tilt angle between the blades 604 and the horizontal plane decreases due to the forward resistance of the wastewater. At this time, the blades 604 retract to reduce the backflow of wastewater. The gate 605 falls back under its own gravity. This process is repeated to ensure that the wastewater mixed with nanobubbles enters the flotation separation chamber 104 better.

[0073] Nanobubbles in the wastewater entering the flotation separation chamber 104 float to the surface under their own buoyancy. During the process of floating, the nanobubbles carry impurities in the water to form scum on the surface. In the scum separation chamber 105, the scum removal mechanism removes the scum, the solid recovery mechanism 106 collects and discharges the scum, and the liquid recovery mechanism 107 collects and discharges the treated wastewater, thus completing the preliminary treatment of the wastewater. The treated wastewater is then returned to the next process for further treatment.

[0074] When the concentration of wastewater increases during the transition from the flocculation mixing chamber 102 to the bubble mixing chamber 103, the power source 303 increases its output power to accelerate the rotation speed of the vent pipe 301 and the ceramic membrane 302. This allows more nanobubbles to be generated and detach from the ceramic membrane 302 into the wastewater, ensuring efficient wastewater treatment in subsequent flotation. Simultaneously, under the power transmission of the transmission component 4, the rotating rod 502 and the stirring plate 503 rotate faster in the opposite direction along the guide groove 702 at the top of the fixed cylinder 701. This allows the increased number of bubbles to detach from the ceramic membrane 302 more effectively and prevents the increased concentration of wastewater from clogging the pores of the ceramic membrane 302. Furthermore, the transmission assembly 4 drives the connecting rod 601 to rotate faster. Under the enhanced centrifugal force, the connecting rod 601 drives the adjusting rod 602 to rotate faster and expand its range of motion. This allows the adjusting rod 602 to move faster and wider while driving the moving part 603 to move faster. The blades 604 move faster and wider under the drive of the moving part 603, thereby pushing more sewage to move faster and impact the gate 605. At this time, the blades 604 cooperate with the sewage to push the gate 605 to rise more, allowing more sewage mixed with bubbles to be discharged into the bubble mixing chamber 103.

[0075] When the upward range of the gate 605 increases, the gate 605 can drive the inclined block 606 to move upward a greater distance. This causes the stirring plate 503 to rotate to a position close to the gate 605. The inclined end of the inclined block 606 then pushes the outer inclined surface 504 of the stirring plate 503 towards the vent pipe 301. At this time, the stirring plate 503 drives the rotating rod 502 to move inward along the adjusting groove 703, so that the rotating rod 502 enters the inner guide groove 702 for rotational limiting and guidance. The elastic element 501 provides stable support during adjustment and ensures stable reset when the subsequent sewage concentration decreases. The opening of the adjusting groove 703 is curved to ensure smooth adjustment of the stirring plate 503 and the rotating rod 502, while simultaneously allowing the inclined block... When the agitator 503 and rotating rod 502 are not moved enough to reach the inner guide groove 702, a smoother inward sliding adjustment is made. The opening of the adjustment groove 703 near the central guide groove 702 gradually increases, so that the agitator 503 and rotating rod 502 can better replace the guide groove 702 when moving at a faster speed. The agitator 503 and rotating rod 502, which move inward step by step, can get closer to the vent pipe 301 and ceramic membrane 302, further ensuring that more bubbles are added when the sewage concentration increases. The stronger cross-flow can better flush and clean the ceramic membrane 302, and the stronger reverse shear force can better ensure that the increased bubbles detach from the surface of the ceramic membrane 302, ensuring better sewage treatment effect in subsequent treatment.

[0076] When the rotation speed of the vent pipe 301 and the ceramic membrane 302 increases to a certain extent, the nanobubbles become less effective at treating high-concentration wastewater via flotation, and instead slow down the wastewater treatment efficiency. At this point, the gate 605 causes the inclined block 606 to rise significantly. The inclined end of the inclined block 606 pushes the stirring plate 503 and the rotating rod 502 along the regulating groove 703 into the innermost guide groove 702 for rotation. At this time, the rotating rod 502 compresses the rubber block 802 towards the center position in the guide groove 702, causing the rubber block 802 to move inward toward the air chamber 801. The movement causes the gas inside the gas chamber 801 to be forced into the telescopic member 804 along the air guide pipe 803, so that the telescopic end of the telescopic member 804 extends upward and pushes the baffle 805 upward. Since the movement of the rotating rod 502 can quickly compress different rubber blocks 802, the telescopic member 804 pushes the baffle 805 to maintain a certain position. The upward movement of the baffle 805 can reduce the width of the inlet of the bubble mixing chamber 103, which can reduce the amount of sewage entering the bubble mixing chamber 103, effectively avoiding excessive sewage volume and reducing the subsequent bubble mixing and adsorption effect.

[0077] When the detection device 9 detects that the concentration of wastewater entering the bubble mixing chamber 103 has increased beyond the standard, it may indicate an accident in the introduced wastewater or the previous stage of treatment. To better protect the flotation and treatment device, the motor in the power source 303 gradually slows down after rapid rotation to better protect the motor. However, the entry of high-concentration wastewater into the bubble mixing chamber 103 causes excessive bubbles or even blocks the ceramic membrane 302. At this time, the vent pipe 301 rotates at high speed for a short time, causing the inclined block 606 to push the stirring plate 503 and the rotating rod 502 along the regulating groove 703. Upon entering the slot 704, the stirring plate 503 and the rotating rod 502 stop rotating under the restriction of the slot 704. This, in turn, intercepts the vent pipe 301 in the opposite direction through the transmission disc 402 and the transmission wheel set 401. Simultaneously, as the rotating rod 502 moves into the slot 704 inside the adjusting groove 703, the rotating rod 502 and the stirring plate 503 move inward, causing the inclined plate 505 to move inward and push the vent pipe 301 upward. This causes the vent pipe 301 to drive the gear set in the power source 303 to misalign, thus protecting the motor and preventing it from being stopped. Damage occurs when the rotating rod 502 enters the slot 704 and further compresses the rubber block 802, causing more gas inside the air chamber 801 to push the telescopic component 804 along the air guide pipe 803, which in turn moves the baffle 805 upward. This baffle 805 blocks sewage from entering the bubble mixing chamber 103, better protecting the structure inside the bubble mixing chamber 103 and preventing the ceramic membrane 302 from becoming blocked and the high-concentration sewage inside from being unable to be treated by the bubbles and causing sedimentation that is difficult to treat. Over time, this will affect the use of the bubble mixing chamber 103. At the same time, the gate 605 moves downward under its own weight and closes the drain outlet, preventing the sewage inside the bubble mixing chamber 103 from entering the flotation separation chamber 104 through the drain outlet and causing subsequent pollution. At this time, the alarm device sounds an alarm, and the staff performs maintenance. After inspection and maintenance, the staff intervenes to reset and restart, thereby ensuring the flotation treatment effect of nanobubbles on sewage. When the detection device 9 detects that the concentration of sewage entering the bubble mixing chamber 103 has decreased, the above process is reversed, thereby ensuring a better sewage treatment effect.

[0078] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wastewater treatment system utilizing nanoscale ceramic membranes to generate dissolved gas-free flotation, comprising a wastewater treatment device (1), characterized in that, Also includes: The wastewater treatment device (1) includes a treatment tank (101), a flocculation mixing chamber (102), and a bubble mixing chamber (103). The exhaust assembly (3) is located inside the wastewater treatment device (1). It includes an exhaust pipe (301) and a ceramic membrane (302). As the wastewater concentration increases, the rotation speed of the exhaust pipe (301) increases, and more gas passes through the ceramic membrane (302) under the action of centrifugal force to form bubbles. The power source (303) is fixedly installed inside the bubble mixing chamber (103), and its output end is fixedly installed on the outside of the vent pipe (301) to drive the vent pipe (301) to rotate, so that the nanobubbles detach from the surface of the ceramic membrane (302); Cross-flow assembly (5), which is connected to the bottom of the vent pipe (301) via the transmission assembly (4), includes a rotating rod (502) and a stirring plate (503) for rotating in the opposite direction to the vent pipe (301) to form cross-flow, thereby causing bubbles to detach from the surface of the ceramic membrane (302); The drainage component (6) is located at the bottom of the transmission component (4). It includes a blade (604) and a gate (605). As the rotation speed of the vent pipe (301) increases, the movement range of the blade (604) increases, which causes the gate (605) to rise more. Adjustment component (7), which is located at the bottom of crossflow component (5), includes guide groove (702) and slot (704) for limiting the rotation of rotating rod (502), and throttling component (8) is provided inside the guide groove (702); The transmission assembly (4) includes: The transmission wheel assembly (401) has its input end slidably connected to the bottom of the vent pipe (301) for transmitting the rotation of the vent pipe (301) and outputting in the opposite direction, and transmitting the rotation downwards; The bottom of the transmission disc (402) is fixedly installed at the output end of the transmission wheel set (401). The air pipe (301) rotates and drives the transmission disc (402) to rotate in the opposite direction through the transmission wheel set (401), thereby driving the cross-flow component (5) to rotate in the opposite direction to form cross-flow. The cross-flow component (5) also includes: The elastic element (501) has one end fixedly connected to the side of the transmission disk (402) and the other end fixedly connected to the side of the rotating rod (502). The side of the rotating rod (502) is fixedly connected to the side of the stirring plate (503) for rotating the rod (502) to drive the stirring plate (503) to rotate and form crossflow. The outer side of the stirring plate (503) is provided with an inclined surface (504) for contacting the drainage component (6) and pushing the rotating rod (502) and the stirring plate (503) to move, so as to adjust the rotation amplitude. The inner side of the stirring plate (503) is fixedly connected with an inclined plate (505) for pushing the vent pipe (301) to rise, so that the vent pipe (301) drives the power source (303) to be misaligned and cut off the power output. The drainage assembly (6) also includes: The adjusting rod (602) has one end fixedly connected to the bottom of the transmission wheel assembly (401) via a connecting rod (601), and the other end is rotatably connected to a movable part (603). The output end of the movable part (603) is hinged to one end of the blade (604) to convert the rotation of the adjusting rod (602) into the movement of the blade (604). The gate (605) is slidably connected at the exhaust port of the bubble mixing chamber (103). An inclined block (606) is fixedly connected to the top side of the gate (605) for the blade (604) to cooperate with the water flow to impact the gate (605), so that the gate (605) drives the inclined block (606) to move upward and push the rotating rod (502) to move.

2. The wastewater treatment system for generating dissolved gas-free flotation using a nanoscale ceramic membrane according to claim 1, characterized in that, Treatment tank (101), which is connected to the outside through pipelines, is used to treat sewage inside; The flocculation mixing chamber (102) is located inside the treatment tank (101) and is used to connect the sewage and flocculant, and to make the sewage and flocculant fully mixed under the stirring plate (503) to form flocs; The bubble mixing chamber (103) is located inside the treatment tank (101) and downstream of the flocculation mixing chamber (102). It is used to connect the flocculation mixing chamber (102) so that the wastewater containing flocculant is mixed with bubbles and then discharged.

3. The wastewater treatment system for generating dissolved gas-free flotation using a nanoscale ceramic membrane according to claim 2, characterized in that, The wastewater treatment device (1) further includes: The air flotation separation chamber (104) is located inside the treatment tank (101) and downstream of the bubble mixing chamber (103). It is used to connect the bubble mixing chamber (103) so that the bubbles in the sewage carry flocs to the surface to form scum. The scum separation chamber (105) is located inside the treatment tank (101) and downstream of the flotation separation chamber (104). It is equipped with a solid recovery mechanism (106) and a liquid recovery mechanism (107) on its side. The solid recovery mechanism (106) is used to collect and discharge the scum on the surface of the sewage, and the treated liquid is collected and discharged by the liquid recovery mechanism (107).

4. The wastewater treatment system for generating dissolved gas-free flotation using a nanoscale ceramic membrane according to claim 1, characterized in that, The exhaust assembly (3) also includes: The top of the vent pipe (301) is rotatably connected to the output end of the air intake device (2), and the bottom side of the vent pipe (301) is fixedly installed with the ceramic membrane (302).

5. The wastewater treatment system for generating dissolved gas-free flotation using a nanoscale ceramic membrane according to claim 1, characterized in that, The adjustment component (7) further includes: A fixed cylinder (701) is disposed inside the bubble mixing chamber (103) and rotatably connected to the transmission disc (402), and a transmission wheel set (401) is installed inside it to support the rotation of the rotating rod (502) at the top of the fixed cylinder (701) and to support the movement of the movable part (603) inside the fixed cylinder (701). The guide groove (702) is opened on the top of the fixed cylinder (701), and multiple sets of guide grooves (702) are arranged in an array. The guide groove (702) has an adjustment groove (703) near the inclined block (606). The innermost side of the adjustment groove (703) has a locking groove (704) for limiting and guiding the rotation and movement of the rotating rod (502) and stopping the rotation.

6. The wastewater treatment system for generating dissolved gas-free flotation using a nanoscale ceramic membrane according to claim 5, characterized in that, The throttling component (8) includes: An air chamber (801) is located inside the fixed cylinder (701) and inside the guide groove (702). A rubber block (802) is sealed and slidably attached to the outside of the air chamber (801). Multiple sets of rubber blocks (802) are arranged in an array around the air chamber (801). When the rotating rod (502) is adjusted to the inner guide groove (702), the rotating rod (502) squeezes the rubber block (802) into the air chamber (801), thereby pushing the gas in the air chamber (801) outward. When the rotating rod (502) moves into the slot (704), the amount of movement of the rotating rod (502) into the air chamber (801) increases and the squeezing force on the rubber block (802) increases, and the amount of gas pushed outward from the air chamber (801) increases. The gas guide tube (803) is connected to the gas chamber (801) at its inlet end and is used to conduct the gas compressed inside the gas chamber (801).

7. The wastewater treatment system for generating dissolved gas-free flotation using a nanoscale ceramic membrane according to claim 6, characterized in that, The throttling component (8) further includes: The telescopic component (804) has its bottom connected to the output end of the air chamber (801) and is used to move in conjunction with the gas guided by the air pipe (803); A baffle (805) is fixedly connected at its bottom to the telescopic end of the telescopic component (804), and is slidably connected at the inlet position of the bubble mixing chamber (103). The telescopic end of the telescopic component (804) pushes the baffle (805) to move, thereby adjusting the sewage flow rate at the inlet of the bubble mixing chamber (103). A detection device (9) is fixedly installed at the inlet position of the bubble mixing chamber (103).

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