Micro-bubble ozone oxidation generation device and use method

Abstract

The invention discloses a microbubble ozone oxidation generation device and a use method. The microbubble ozone oxidation generation device comprises an oxygen generator, an ozone generator, a bubble generator, a water circulation system, a three-phase reaction module, a gas-liquid-solid separation module, a water quality real-time monitoring module and a self-adaptive regulation and control module. Micro-nano bubbles are generated through a bubble generator, ozone decomposition is enhanced by matching with a catalytic coating of the three-phase reaction module, and the gas-liquid-solid separation module is utilized to realize the cooperation of oxidative degradation and solid-liquid separation. According to the using method, efficient cooperative treatment of organic pollutants and suspended solids is achieved through the closed-loop process of pretreatment, parameter self-adaptive matching, micro-nano bubble ozone preparation, three-phase cooperative reaction, gas-liquid-solid synchronous separation and real-time feedback optimization. The system solves the problems of low treatment efficiency, high energy consumption and poor adaptability in the prior art, and has the advantages of high ozone utilization rate, remarkable energy conservation and consumption reduction, high intelligent degree, low operation and maintenance cost and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wastewater treatment, in particular to a micro-bubble ozone oxidation generating device and a use method thereof. BACKGROUND

[0002] With the accelerating process of industrialization and urbanization, the composition of organic pollutants in industrial wastewater is becoming increasingly complex. Traditional physical, chemical or biological treatment methods have low treatment efficiency and high operating cost when facing high-concentration and difficult-to-degrade organic pollutants, and it is difficult to meet the increasingly stringent emission standards. Therefore, advanced oxidation technology has gradually become an important development direction for wastewater deep treatment. Among them, ozone oxidation process is widely used in various industrial wastewater treatment fields due to its strong oxidation ability and less secondary pollution.

[0003] Although ozone itself has a high oxidation-reduction potential, its solubility in water is low, and the reaction efficiency is easily limited by the mass transfer rate, resulting in low ozone utilization rate and increased energy and operating costs. The existing ozone oxidation devices mostly use traditional aeration or Venturi mixing methods, and the micro-bubble generation is insufficient, resulting in limited gas-liquid contact area, low ozone mass transfer efficiency, insufficient ozone solubility in water, affecting the oxidation reaction efficiency, and leading to high energy consumption and poor effect. Some micro-bubble devices are difficult to continuously generate stable bubbles with a particle size of less than 50 μm, and the micro-bubbles quickly float, merge or collapse in water, affecting the continuous release of ozone and deep oxidation reaction. The traditional micro-bubble generator and ozone generator are often designed as a split type, which occupies a large area, has complex pipeline connection, and has problems of leakage and energy loss, with high maintenance and operation cost. Under different water quality conditions such as high COD, high color and high salinity, the ozone oxidation capacity of the existing device is difficult to adaptively adjust, and there are problems of large fluctuation of treatment capacity and unstable effect. SUMMARY

[0004] The present application aims to solve the technical defects of low ozone utilization rate, insufficient reaction, complex structure, high energy consumption, high maintenance cost and lack of solid-liquid synchronous treatment capacity in the existing micro-bubble ozone oxidation device, and provides a micro-bubble ozone oxidation generating device and a use method thereof. The ozone is uniformly dispersed and efficiently dissolved in the water in the form of micro-bubbles by the micro-bubble generator, forming highly uniform dissolved air water, which greatly improves the contact area and reaction time between ozone and pollutants, thereby significantly improving the oxidation efficiency. The specific technical solutions are as follows: A microbubble ozone oxidation generator includes an oxygen generator, an ozone generator, a bubble generator, a water circulation system, a three-phase reaction module, a gas-liquid-solid separation module, a real-time water quality monitoring module, and an adaptive control module, all integrated into a single unit. The water circulation system pumps wastewater into the device via a circulating water pump, ensuring thorough mixing of the wastewater with the microbubbles from bottom to top. The bubble generator incorporates an adjustable nozzle and a multi-stage shear chamber, with its output end sealed to the bottom input end of the three-phase reaction module. The three-phase reaction module has a columnar structure and employs a batch continuous composite reaction mode, with its top output end connected to... The bottom input end of the gas-liquid-solid separation module is coaxially connected; the real-time water quality monitoring module includes an inlet probe and an outlet probe, which are respectively installed in the main inlet pipeline of the three-phase reaction module and the purified water outlet pipeline of the gas-liquid-solid separation module; the adaptive control module is independently integrated in the control box at the top of the device, and is connected to the ozone generator, bubble generator and the real-time water quality monitoring module, and dynamically adjusts the ozone dosage and bubble particle size according to the monitoring data; the gas-liquid-solid separation module has a built-in spiral separation channel and a magnetic adsorption unit to achieve the synergistic effect of oxidative degradation of pollutants and flotation removal of suspended solids.

[0005] Preferably, the bubble generator disperses ozone gas into microbubbles or nanobubbles with a diameter of less than 0.01 mm through high-speed water flow shearing. The opening range of the adjustable nozzle is 0.2 to 2 mm. The multi-stage shearing chamber is sequentially provided with a porous shearing layer, a turbulent impact layer and a steady-state mixing layer.

[0006] Preferably, the adaptive control module incorporates a built-in PID control algorithm to dynamically adjust the ozone dosage within the range of 5–50 g / h based on the influent COD value; and adjusts the bubble size according to color and TSS content. For low-pollution water with COD ≤ 500 mg / L and color ≤ 200 times, the corresponding bubble size is 100–1000 nm; for high-pollution water with COD > 500 mg / L and color > 200 times, the corresponding bubble size is 0.1–100 nm.

[0007] Preferably, the three-phase reaction module is equipped with a guide plate and a turbulence protrusion to form a spiral upward flow channel. The inner wall of the flow channel is coated with a MnO2-TiO2 composite catalytic coating to catalyze the decomposition of ozone to generate hydroxyl radicals. The designed flow velocity of water in the flow channel is 0.1 to 0.3 m / s.

[0008] Preferably, the gas-liquid-solid separation module includes a top gas collection chamber, a middle spiral separation channel, and a bottom solid collection chamber; the spiral angle of the spiral separation channel is 30-45°, and the inner wall is provided with a polytetrafluoroethylene hydrophobic coating; the bottom solid collection chamber contains a 100-200 mesh detachable filter and a neodymium iron boron magnetic adsorption rod, and the side of the solid collection chamber is provided with a quick-opening discharge port.

[0009] A method of using a microbubble ozone oxidation generator includes the following steps: S1 gas source preparation and ozone generation: external air is introduced into an oxygen generator for oxygen enrichment treatment, the oxygen concentration is ≥90%, the oxygen-enriched gas is transported to an ozone generator, and the ozone generator converts it into ozone gas with a concentration of 80-150 mg / L for subsequent gas-liquid mixing; S2 wastewater delivery and water quality preliminary inspection: after the pretreatment of removing large particle impurities by grating filtration or sedimentation, the treated wastewater is pumped into the bubble generator by the circulating water pump at a flow rate of 1-6 m³ / h, and the water quality real-time monitoring module detects the wastewater COD, color and TSS concentration at the inlet probe, and the detection data is transmitted to the adaptive control module in real time; S3 parameter adaptive matching: the adaptive control module dynamically outputs control instructions based on the PID control algorithm according to the inlet water quality data: the ozone dosage of the ozone generator is adjusted to 5-50 g / h according to the COD value; the adjustable nozzle opening and multi-stage shear cavity shear strength of the bubble generator are adjusted according to the color and TSS content to make the generated micro-bubbles or nano-bubbles meet the corresponding water quality requirements; S4 micro-bubble generation and gas-liquid mixing: the ozone gas enters the bubble generator, which is dispersed into micro-bubbles or nano-bubbles of a set particle size under the synergistic action of the adjustable nozzle and the multi-stage shear cavity, and is preliminarily mixed with the pumped wastewater in the bubble generator to form a gas-liquid mixing system; S5 three-phase synergistic reaction: the gas-liquid mixing system enters the three-phase reaction module with a columnar structure, flows along the spiral rising flow channel formed by the guide plate and the turbulence protrusion, and adopts a batch continuous composite reaction mode to react at 15-45°C and pH 6-9 for 10-60 minutes; the catalytic coating in the flow channel catalyzes the decomposition of ozone to generate hydroxyl radicals, and simultaneously realizes the oxidation degradation of organic pollutants and the flotation adsorption of suspended solids; S6 gas-liquid-solid synchronous separation: the gas-liquid-solid mixing system after reaction enters the gas-liquid-solid separation module at the top of the bubble generator, the unreacted ozone gas is collected by the top gas collection cavity and then discharged for treatment, the suspended solids are intercepted and collected under the synergistic action of the centrifugal force in the middle spiral separation channel and the magnetic adsorption rod and detachable filter screen in the bottom solid collection bin, and the purified water is discharged through the middle of the separation module; S7 real-time feedback optimization: the outlet probe of the water quality real-time monitoring module detects the COD, color, TSS and residual ozone concentration of the purified water, and the data is fed back to the adaptive control module; if the outlet indicators do not meet the preset standards, the adaptive control module adjusts the ozone dosage and bubble particle size again until the outlet water meets the standards.

[0010] Preferably, the pretreatment in S2 is grating filtration or sedimentation treatment to remove large particle impurities with a particle size greater than 5 mm, and the ratio of wastewater delivery flow rate to ozone dosage is controlled to be 1-6 m³ / h:1 g / h.

[0011] Preferably, the flow velocity of the water flow in the spiral rising flow channel of the three-phase reaction module in S5 is 0.1-0.3 m / s, and the stable operation of the batch-continuous composite reaction mode is maintained through the flow regulation of the circulating water pump.

[0012] Preferably, the interception efficiency of the suspended solids TSS in S6 is not less than 95%, the COD removal rate of the purified water is not less than 85%, and the color removal rate is not less than 90%.

[0013] Compared with the closest prior art, the technical scheme provided by the present application has the following beneficial effects: 1. The present application uniformly disperses and efficiently dissolves ozone in the form of micro-bubbles in water through a micro-bubble generator, forms highly uniform dissolved gas water, greatly increases the contact area and reaction time between ozone and pollutants, thereby significantly improving the oxidation efficiency, and the ozone utilization rate is increased by 2-5 times compared with traditional bubble-type ozone systems; the flotation effect of micro-bubbles during the rising process can cooperatively remove suspended solids TSS in wastewater, effectively reduces the dependence of subsequent treatment processes on flocculation, sedimentation or filtration units, simplifies the treatment process, and reduces the overall investment and operating cost.

[0014] 2. The present application generates micro-nano bubbles with a diameter of less than 0.01 mm through adjustable nozzles and multi-stage shearing cavities, cooperates with the spiral flow channel of the three-phase reaction module and the MnO2-TiO2 catalytic coating to improve the solubility of ozone, the COD removal rate is ≥85%, the color removal rate is ≥90%, and high-concentration refractory organic pollutants can be efficiently degraded.

[0015] 3. The present application uses an oxygen concentrator for oxygen-rich pretreatment, so that the ozone dosage is only 5%-20% of that of traditional ozone systems; without external high-shear pumps and separate separation equipment, the overall energy consumption of the system is reduced by more than 50%, and the unit treatment cost is reduced by 40%-60%. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the micro-bubble ozone oxidation generating device of the present application; Figure 1 Medium: 1, oxygen concentrator; 2, ozone generator; 3, circulating water pump; 4, bubble generator; 5, three-phase reaction module; 6, gas-liquid-solid separation module. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of the present application.

[0018] Embodiments Please refer to Figure 1 A micro-bubble ozone oxidation generating device, comprising an oxygen generator 1, an ozone generator 2, a bubble generator 4, a water circulation system, a three-phase reaction module 5, a gas-liquid-solid separation module 6, a water quality real-time monitoring module and a self-adaptive control module, each unit is integrally arranged. The ozone generator 2 is provided with an air source through an external air supply system, the ozone generator 2 converts the air into ozone gas, and the ozone gas is transported to the bubble generator 4. The ozone gas is sheared by high-speed water flow in the bubble generator 4 to form micro-bubbles or nano-bubbles, the diameter is usually less than 0.01 mm, ozone-enriched dissolved air water is formed, and the solubility and utilization rate of ozone are significantly improved. The water circulation system is that the sewage is pumped into the reaction device by the circulating water pump 3, flows from bottom to top, and is fully mixed with the micro-bubbles, and the mass transfer and reaction process are completed in the columnar reactor.

[0019] The water circulation system pumps the wastewater into the device by the circulating water pump 3, so that the wastewater is fully mixed with the micro-bubbles from bottom to top; the bubble generator 4 is internally provided with adjustable nozzles and multi-stage shearing cavities, the output end is sealingly connected with the bottom input end of the three-phase reaction module 5; the three-phase reaction module 5 is in a columnar structure, adopts a batch continuous composite reaction mode, and the top output end is coaxially connected with the bottom input end of the gas-liquid-solid separation module; the water quality real-time monitoring module comprises an inlet probe and an outlet probe, which are respectively installed on the water inlet main pipeline of the three-phase reaction module 5 and the purified water outlet pipeline of the gas-liquid-solid separation module 6; the self-adaptive control module is independently integrated in the top control box of the device, is signal-connected with the ozone generator 2, the bubble generator 4 and the water quality real-time monitoring module, and dynamically adjusts the ozone dosage and the bubble particle size according to the monitoring data; the gas-liquid-solid separation module 6 is internally provided with a spiral separation channel and a magnetic adsorption unit, so as to realize the synergistic effect of the oxidation degradation of pollutants and the flotation removal of suspended solids. The ozone is uniformly dispersed and efficiently dissolved in the water in the form of micro-bubbles by the micro-bubble generator, the highly uniform dissolved air water is formed, the contact area and reaction time between the ozone and the pollutants are greatly improved, the oxidation efficiency is significantly improved, the ozone utilization rate is increased by 2-5 times compared with the traditional bubble-type ozone system, the flotation effect of the micro-bubbles in the rising process can cooperatively remove the suspended solids TSS in the wastewater, the dependence of the subsequent treatment process on the flocculation, sedimentation or filtration unit is effectively reduced, the treatment process is simplified, and the overall investment and operation cost are reduced.

[0020] Further, the bubble generator 4 disperses ozone gas into micro-bubbles or nano-bubbles with a diameter less than 0.01mm through high-speed water flow shearing. The opening of the adjustable nozzle can be adjusted in the range of 0.2-2mm. The multi-stage shearing cavity is provided with a porous shearing layer, a turbulent impact layer and a stable mixing layer in sequence. The adjustable nozzle and the multi-stage shearing cavity generate micro-nano bubbles with a diameter less than 0.01mm. The spiral flow channel of the three-phase reaction module and the MnO2-TiO2 catalytic coating are matched to improve the solubility of ozone, with a COD removal rate of ≥85% and a color removal rate of ≥90%. High-concentration refractory organic pollutants can be efficiently degraded.

[0021] Further, the adaptive control module is built-in with a PID control algorithm. The ozone dosage is dynamically adjusted in the range of 5-50g / h according to the influent COD value. The bubble particle size is adjusted according to the color and TSS content. For low-polluted water quality with COD≤500mg / L and color≤200 times, the bubble particle size is 100-1000nm. For high-polluted water quality with COD>500mg / L and color>200 times, the bubble particle size is 0.1-100nm.

[0022] Further, the three-phase reaction module 5 is provided with a guide plate and a turbulent protrusion inside to form a spiral rising flow channel. The inner wall of the flow channel is coated with a MnO2-TiO2 composite catalytic coating to catalyze the decomposition of ozone to generate hydroxyl radicals. The water flow in the flow channel is designed to have a flow rate of 0.1-0.3m / s.

[0023] Further, the gas-liquid-solid separation module 6 includes a top gas collection cavity, a middle spiral separation channel and a bottom solid collection bin. The spiral separation channel has a spiral angle of 30-45° and is provided with a polytetrafluoroethylene hydrophobic coating on the inner wall. The bottom solid collection bin is built-in with a 100-200 mesh detachable filter screen and a neodymium-iron-boron magnetic adsorption rod. The side of the solid collection bin is provided with a quick-opening discharge port.

[0024] A method for using a micro-bubble ozone oxidation generating device, comprising the following steps: S1 Air source preparation and ozone generation: external air is introduced into an oxygen concentrator 1 for oxygen enrichment treatment, with an oxygen concentration of ≥90%. The oxygen-enriched gas is delivered to an ozone generator 2, which converts it into ozone gas with a concentration of 80-150mg / L for subsequent gas-liquid mixing; S2 Wastewater delivery and water quality preliminary inspection: after the wastewater to be treated is pretreated by grid filtration or sedimentation to remove large particle impurities, it is pumped into the bubble generator at a flow rate of 1-6m³ / h by a circulating water pump 3. The water quality real-time monitoring module detects the COD, color and TSS concentration of the wastewater at the inlet end probe. The detection data is transmitted in real time to the adaptive control module; S3 Parameter adaptive matching: The adaptive control module dynamically outputs control instructions based on the PID control algorithm according to the influent water quality data: the ozone dosage of the ozone generator is adjusted according to the COD value to 5-50 g / h; the adjustable nozzle opening of the bubble generator 4 and the shear strength of the multi-stage shear cavity are adjusted according to the chroma and TSS content to make the particle size of the generated micro-bubbles or nano-bubbles meet the corresponding water quality requirements; S4 Micro-bubble generation and gas-liquid mixing: The ozone gas enters the bubble generator 4, which is dispersed into micro-bubbles or nano-bubbles of a set particle size under the synergistic action of the adjustable nozzle and the multi-stage shear cavity, and is preliminarily mixed with the pumped wastewater in the bubble generator to form a gas-liquid mixing system. S5 Three-phase synergistic reaction: The gas-liquid mixing system enters the three-phase reaction module 5 of columnar structure, flows along the spiral rising flow channel formed by the guide plate and the turbulence protrusion, and adopts a batch continuous composite reaction mode to react at 15-45℃, pH 6-9 for 10-60 minutes; the catalytic coating in the flow channel catalyzes the decomposition of ozone to generate hydroxyl radicals, and simultaneously realizes the oxidation degradation of organic pollutants and the flotation adsorption of suspended solids; S6 Gas-liquid-solid synchronous separation: The gas-liquid-solid mixing system after reaction enters the gas-liquid-solid separation module at the top of the bubble generator 4, the unreacted ozone gas is collected by the top gas collection cavity and then discharged for treatment, the suspended solids are intercepted and collected under the synergistic action of the centrifugal force of the middle spiral separation channel and the magnetic adsorption rod and detachable filter screen in the bottom solid collection bin, and the purified water is discharged through the middle of the separation module; S7 Real-time feedback optimization: The effluent probe of the water quality real-time monitoring module detects the COD, chroma, TSS and residual ozone concentration of the purified water, and the data is fed back to the adaptive control module; if the effluent indicators do not meet the preset standards, the adaptive control module adjusts the ozone dosage and bubble particle size again until the effluent meets the standards.

[0025] Further, the pretreatment in S2 is grid filtration or sedimentation treatment, which removes large particle impurities with a particle size greater than 5mm, and the ratio of wastewater delivery flow rate to ozone dosage is controlled to be 1-6m³ / h:1g / h.

[0026] Further, the water flow velocity in the spiral rising flow channel of the three-phase reaction module 5 in S5 is 0.1-0.3m / s, which is maintained by adjusting the flow rate of the circulating water pump 3 to maintain the stable operation of the batch continuous composite reaction mode.

[0027] Further, in S6, the TSS interception efficiency of suspended solids is not less than 95%, the COD removal rate of purified water is not less than 85%, and the chroma removal rate is not less than 90%.

[0028] The above examples are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application has been described in detail with reference to the above examples, ordinary skilled person in the art can still modify or equivalently replace the specific implementation of the present application without departing from the spirit and scope of the present application. Any modification or equivalent replacement without departing from the spirit and scope of the present application is intended to be within the scope of the claims of the present application.

Claims

1. A microbubble ozone oxidation generating device, characterized by comprising: a microbubble generator; an ozone generator; and a mixing unit that mixes ozone and microbubbles. The device comprises an oxygen generator, an ozone generator, a bubble generator, a water circulation system, a three-phase reaction module, a gas-liquid-solid separation module, a water quality real-time monitoring module, and a self-adaptive control module, and each unit is integrally arranged; the water circulation system pumps wastewater into the device through a circulating water pump, so that the wastewater is fully mixed with micro-bubbles from bottom to top; the bubble generator is internally provided with an adjustable nozzle and a multi-stage shearing cavity, the output end of which is in sealing butt joint with the bottom input end of the three-phase reaction module; the three-phase reaction module is in a columnar structure, adopts a batch continuous composite reaction mode, and the top output end is coaxially butt jointed with the bottom input end of the gas-liquid-solid separation module; the water quality real-time monitoring module comprises an inlet probe and an outlet probe, which are respectively installed on the water inlet main pipeline of the three-phase reaction module and the purified water outlet pipeline of the gas-liquid-solid separation module; the self-adaptive control module is independently integrated in the top control box of the device, is signal-connected with the ozone generator, the bubble generator, and the water quality real-time monitoring module, and dynamically adjusts the ozone dosage and the bubble particle size according to the monitoring data; the gas-liquid-solid separation module is internally provided with a spiral separation channel and a magnetic adsorption unit, so as to realize the synergistic effect of the oxidation degradation of pollutants and the flotation removal of suspended solids.

2. The microbubble ozone oxidation generating apparatus according to claim 1, wherein The bubble generator disperses the ozone gas into micro-bubbles or nanobubbles with a diameter less than 0.01mm through high-speed water flow shearing, the opening adjustment range of the adjustable nozzle is 0.2-2mm, and the multi-stage shearing cavity is sequentially provided with a porous shearing layer, a turbulent impact layer, and a steady mixing layer.

3. The microbubble ozone oxidation generating apparatus according to claim 1, wherein The self-adaptive control module is internally provided with a PID control algorithm, dynamically adjusts the ozone dosage in the range of 5-50g / h according to the inlet COD value, adjusts the bubble particle size according to the chroma and TSS content, and corresponds the bubble particle size to 100-1000nm when the COD is less than or equal to 500mg / L and the chroma is less than or equal to 200 times, and corresponds the bubble particle size to 0.1-100nm when the COD is greater than 500mg / L and the chroma is greater than 200 times.

4. The microbubble ozone oxidation generating apparatus according to claim 1, wherein The three-phase reaction module is internally provided with a guide plate and a turbulence protrusion, forms a spiral rising flow channel, the inner wall of the flow channel is coated with a MnO2-TiO2 composite catalytic coating, catalyzes the decomposition of ozone to generate hydroxyl radicals, and the water flow in the flow channel is designed to have a flow rate of 0.1-0.3m / s.

5. The microbubble ozone oxidation generating apparatus according to claim 1, wherein The gas-liquid-solid separation module comprises a top gas collection cavity, a middle spiral separation channel, and a bottom solid collection bin; the spiral angle of the spiral separation channel is 30-45°, and the inner wall is provided with a polytetrafluoroethylene hydrophobic coating; the bottom solid collection bin is internally provided with a 100-200 mesh detachable filter screen and a neodymium iron boron magnetic adsorption rod, and the side surface of the solid collection bin is provided with a quick-opening discharge port.

6. A method for using a microbubble ozone oxidation generating apparatus, characterized by, The device of any one of claims 1-5 is used for wastewater treatment, comprising the following steps: S1: gas source preparation and ozone generation: external air is introduced into an oxygen generator for oxygen enrichment treatment, the oxygen concentration is greater than or equal to 90%, the oxygen-enriched gas is transported to an ozone generator, the ozone generator converts the oxygen-enriched gas into ozone gas with a concentration of 80-150mg / L for subsequent gas-liquid mixing; S2 wastewater delivery and initial water quality inspection: After the pretreatment of removing large particle impurities by grating filtration or sedimentation, the wastewater is pumped into the bubble generator by the circulating water pump at a flow rate of 1-6 m³ / h, and the water quality real-time monitoring module detects the COD, color and TSS concentration of the wastewater at the inlet probe, and the detection data is transmitted to the adaptive control module in real time; S3 parameter adaptive matching: Based on the PID control algorithm, the adaptive control module dynamically outputs control instructions according to the inlet water quality data: adjusts the ozone dosage of the ozone generator to 5-50 g / h according to the COD value; adjusts the adjustable nozzle opening and multi-stage shear cavity shear strength of the bubble generator according to the color and TSS content to make the particle size of the generated micro-bubbles or nano-bubbles meet the corresponding water quality requirements; S4 micro-bubble generation and gas-liquid mixing: The ozone gas enters the bubble generator and is dispersed into micro-bubbles or nano-bubbles of a set particle size under the synergistic action of the adjustable nozzle and the multi-stage shear cavity, and is preliminarily mixed with the pumped wastewater in the bubble generator to form a gas-liquid mixing system; S5 three-phase synergistic reaction: The gas-liquid mixing system enters the three-phase reaction module with a columnar structure, flows along the spiral rising flow channel formed by the guide plate and the turbulence protrusion, and adopts a batch continuous composite reaction mode under the conditions of 15-45℃ and pH 6-9 for 10-60 minutes; the catalytic coating in the flow channel catalyzes the decomposition of ozone to generate hydroxyl radicals, and simultaneously realizes the oxidation degradation of organic pollutants and the flotation adsorption of suspended solids; S6 gas-liquid-solid simultaneous separation: The gas-liquid-solid mixing system after reaction enters the gas-liquid-solid separation module at the top of the bubble generator, the unreacted ozone gas is collected and discharged after being collected by the top gas collection chamber, the suspended solids are intercepted and collected under the synergistic action of the centrifugal force of the middle spiral separation channel and the magnetic adsorption rod and detachable filter screen in the bottom solid collection bin, and the purified water is discharged through the middle of the separation module; S7 real-time feedback optimization: The outlet probe of the water quality real-time monitoring module detects the COD, color, TSS and residual ozone concentration of the purified water, and the data is fed back to the adaptive control module; if the outlet indicators do not meet the preset standards, the adaptive control module adjusts the ozone dosage and bubble particle size until the outlet water meets the standards.

7. The method of using a microbubble ozone oxidation generating device according to claim 6, wherein The pretreatment in S2 is grating filtration or sedimentation, which removes large particle impurities with a particle size greater than 5 mm, and the ratio of wastewater delivery flow rate to ozone dosage is controlled at 1-6 m³ / h:1 g / h.

8. The method of using a microbubble ozone oxidation generating device according to claim 6, wherein In S5, the water flow velocity in the spiral rising flow channel of the three-phase reaction module is 0.1-0.3 m / s, which is maintained by adjusting the flow rate of the circulating water pump to ensure stable operation of the batch continuous composite reaction mode.

9. The method of using a microbubble ozone oxidation generating device according to claim 6, wherein In S6, the TSS removal efficiency of suspended solids is not less than 95%, and the COD removal rate of purified water is not less than 85% and the color removal rate is not less than 90%.

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