Ultrasonic-ozone coupling catalytic oxidation wastewater treatment device

Abstract

The application discloses an ultrasonic-ozone coupling catalytic oxidation wastewater treatment device, and relates to the technical field of wastewater treatment.The device comprises a treatment box, a water inlet pipe and a water outlet pipe, and further comprises a wastewater treatment assembly.The wastewater treatment assembly comprises an ozone generator, a stirring motor, a reflux pipe, a driving pump, a spray head, a stirring rod, an ultrasonic vibrator and a rotating shaft.The ozone generator is fixed to the bottom of the outside of the treatment box, a plurality of spray heads are fixed to the bottom of the box body, and the spray heads and the ozone generator are communicated.The stirring motor is fixedly installed at the middle of the top end of the treatment box, the output end of the stirring motor is connected with the rotating shaft downward, the rotating shaft vertically extends into the treatment box, and a plurality of stirring rods are fixed to the side wall of the rotating shaft.The end of each stirring rod is fixed with an ultrasonic vibrator.The one end of the reflux pipe is communicated with the bottom of the treatment box, the other end is communicated with the upper part of the treatment box, and the driving pump is installed on the reflux pipe.The device realizes uniform coverage of wastewater in different areas in the treatment box by ultrasonic waves, eliminates the treatment blind area, and promotes the full mixing of ozone and wastewater.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to an ultrasonic-ozone coupled catalytic oxidation wastewater treatment device. Background Technology

[0002] With the rapid development of industrial sectors, industries such as chemical, pharmaceutical, printing and dyeing, and light industry generate large amounts of complex, poorly biodegradable, and recalcitrant organic wastewater during production. This type of wastewater contains a large amount of macromolecular organic matter, persistent pollutants, and toxic and harmful substances. Direct discharge of such wastewater can severely damage aquatic ecosystems and threaten human health. Ozone catalytic oxidation technology, with its advantages of strong oxidation capacity, no secondary pollution, and fast reaction rate, is widely used in the treatment of recalcitrant industrial wastewater.

[0003] Ozone's own oxidation capacity is limited, making it difficult to efficiently degrade stubborn organic pollutants with extremely high stability. To improve the technical shortcomings of ozone oxidation alone, existing technologies have developed a coupled process of ultrasound-assisted ozone treatment for wastewater. This process utilizes the cavitation effect of ultrasound to enhance the ozone oxidation effect. Traditional ultrasound equipment often adopts a fixed-point installation method, resulting in a limited ultrasonic coverage area and the formation of treatment blind spots. This leads to uneven ultrasonic treatment of wastewater within the tank and fails to achieve sufficient mixing of ozone and wastewater, resulting in poor gas-liquid mass transfer. Summary of the Invention

[0004] This application provides an ultrasonic-ozone coupled catalytic oxidation wastewater treatment device, which solves the problems of existing ultrasonic equipment that mostly adopts fixed-point installation, resulting in limited ultrasonic coverage, easy formation of treatment blind spots, uneven ultrasonic treatment of wastewater in the tank, and inability to achieve sufficient mixing of ozone and wastewater, leading to poor gas-liquid mass transfer efficiency. The device achieves uniform ultrasonic coverage of wastewater in different areas of the treatment tank, eliminates treatment blind spots, and promotes sufficient mixing of ozone and wastewater by moving the ultrasonic generating component and disturbing the wastewater, thereby improving gas-liquid mass transfer efficiency.

[0005] This application provides an ultrasonic-ozone coupled catalytic oxidation wastewater treatment device, including a treatment tank, an inlet pipe, and an outlet pipe; It also includes wastewater treatment components; The wastewater treatment assembly includes an ozone generator, a stirring motor, a return pipe, a drive pump, a nozzle, a stirring rod, an ultrasonic transducer, and a rotating shaft. The ozone generator is fixed to the bottom of the outside of the treatment box, and multiple nozzles are fixed to the bottom of the box. The nozzles are connected to the ozone generator. The stirring motor is fixedly installed at the top center of the processing box. The output end of the stirring motor is connected to the rotating shaft with the downward direction. The rotating shaft extends vertically into the processing box. Multiple stirring rods are evenly fixed to the side wall of the rotating shaft along the length of the rotating shaft. Each end of the stirring rod is fixed with an ultrasonic transducer; One end of the return pipe is connected to the bottom of the processing box, and the other end is connected to the top of the processing box. The drive pump is installed on the return pipe.

[0006] Furthermore, the processing box is equipped with an air supply pipe; The gas transmission pipe includes multiple parallel horizontal pipes, and adjacent horizontal pipes are connected by a connecting riser. The air inlet of the gas pipe extends through the side wall of the treatment box and is connected to the ozone generator. Several nozzles are evenly fixed at the top of each of the transverse pipes.

[0007] Furthermore, several ultrasonic generators are fixedly installed on the inner side wall of the processing box; The ultrasonic generator and the ultrasonic transducer at the end of the stirring rod are staggered. The ultrasonic generator is used to output a high-frequency electrical signal to excite the ultrasonic transducer to vibrate stably.

[0008] Furthermore, multiple downwardly inclined fixing rods are fixed to the bottom of the rotating shaft, and the inclination angles of the multiple fixing rods are all different. An ultrasonic transducer is fixedly installed at the end of each fixing rod.

[0009] Furthermore, the rotating shaft is configured as a threaded rod; The stirring rod is spirally connected to the rotating shaft, and the stirring rod can reciprocate along the axial direction of the rotating shaft under the action of water flow resistance.

[0010] Furthermore, a support leg is fixedly installed at the bottom of the processing box; The ozone generator is fixedly installed in the gap between each support leg.

[0011] Furthermore, a sealing ring is provided at the through connection between the rotating shaft and the processing box; The sealing ring is fitted onto the outside of the rotating shaft and is sealed to the processing box.

[0012] Furthermore, the top of the processing box is provided with an exhaust port for discharging waste gas and non-condensable gases.

[0013] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: The motor drives the stirring rod to rotate, which in turn causes the wastewater to flow. Combined with the ultrasonic transducers at the ends of the fixed rods with different tilt angles, ultrasonic cavitation treatment can be performed on wastewater at different depths and positions within the treatment tank. This solves the problems of existing ultrasonic equipment, which mostly uses fixed-point installation, resulting in limited ultrasonic coverage, easy formation of treatment blind spots, and inability to achieve sufficient mixing of ozone and wastewater, as well as poor gas-liquid mass transfer. This technology achieves uniform ultrasonic coverage of wastewater in different areas within the treatment tank, eliminates treatment blind spots, and promotes thorough mixing of ozone and wastewater. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an ultrasonic-ozone coupled catalytic oxidation wastewater treatment device according to the present invention; Figure 2 This is a cross-sectional structural schematic diagram of an ultrasonic-ozone coupled catalytic oxidation wastewater treatment device according to the present invention; Figure 3 This is a schematic diagram of the internal structure of an ultrasonic-ozone coupled catalytic oxidation wastewater treatment device according to the present invention; Figure 4 This is a schematic diagram of the stirring rod of an ultrasonic-ozone coupled catalytic oxidation wastewater treatment device according to the present invention.

[0015] In the diagram: 101, processing tank; 102, support leg; 103, water inlet pipe; 104, drain pipe; 200. Wastewater treatment components; 201. Ozone generator; 202. Stirring motor; 203. Return pipe; 204. Drive pump; 205. Ultrasonic generator; 206. Gas supply pipe; 207. Nozzle; 208. Stirring rod; 209. Ultrasonic transducer; 210. Rotating shaft; 211. Fixing rod; 212. Sealing ring. Detailed Implementation

[0016] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0017] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] like Figures 1 to 4 As shown, this application proposes an ultrasonic-ozone coupled catalytic oxidation wastewater treatment device, including a treatment tank 101, an inlet pipe 103, and a drain pipe 104. The inlet pipe 103 and the drain pipe 104 are fixed to one side of the treatment tank 101. Wastewater enters the treatment tank 101 through the inlet pipe 103 and is discharged from the drain pipe 104 after treatment. It also includes a wastewater treatment component 200; the wastewater treatment component 200 includes an ozone generator 201, a stirring motor 202, a return pipe 203, a drive pump 204, a nozzle 207, a stirring rod 208, an ultrasonic transducer 209, and a rotating shaft 210. The ozone generator 201 is fixed to the bottom outside of the treatment tank 101. Multiple nozzles 207 are fixed to the bottom inside the tank, and the nozzles 207 are connected to the ozone generator 201. The ozone generated by the ozone generator 201 is sprayed into the wastewater inside the treatment tank 101 through the nozzles 207 and released. The stirring motor 202 is fixedly installed at the top center of the treatment tank 101. The output end of the stirring motor 202 is connected to a rotating shaft 210 facing downwards. The rotating shaft 210 extends vertically into the treatment tank 101. Multiple stirring rods 208 are evenly fixed to the side wall of the rotating shaft 210 along its length. When the stirring motor 202 is running, it can drive the rotating shaft 210 to rotate, which in turn drives the stirring rod 208 to stir the wastewater in the treatment tank 101, allowing ozone to mix and come into contact with the wastewater fully, thereby improving the oxidation reaction efficiency. Each end of the stirring rod 208 is fixed with an ultrasonic transducer 209. When the stirring motor 202 drives the rotating shaft 210 and the stirring rod 208 to rotate, it can drive each ultrasonic transducer 209 to move synchronously in the wastewater, ensuring that the wastewater in different locations inside the treatment tank 101 can receive ultrasonic vibration. The cavitation effect generated by the ultrasonic waves in the wastewater can, on the one hand, enhance the decomposition of ozone molecules to generate oxygen. The more potent hydroxyl radicals enhance the overall oxidation and degradation capabilities. On the other hand, they can also disturb the water flow, preventing pollutants in the wastewater from adhering to the inner wall or surface of the device, thus maintaining the device's stable processing capacity. One end of the return pipe 203 is connected to the bottom of the treatment tank 101, and the other end is connected to the top of the treatment tank 101. The drive pump 204 is installed on the return pipe 203. After the drive pump 204 is started, the wastewater at the bottom of the treatment tank 101 can be transported to the top of the tank through the return pipe 203 for further treatment, allowing the unreacted wastewater to participate in the oxidation reaction repeatedly, further improving the wastewater treatment effect.

[0020] Preferably, the height of the inlet of the return pipe 203 is higher than that of the inlet pipe 103, and the height of the outlet of the return pipe 203 is lower than that of the drain pipe 104. This height setting allows the wastewater newly entering the treatment tank 101 to undergo preliminary oxidation before participating in the return flow during the process of driving the pump 204 to return the wastewater. This avoids the untreated wastewater that has not entered the tank from directly short-circuiting and circulating. At the same time, it ensures that the returned wastewater is evenly distributed from the top of the tank and fully re-exposed to the ozone and ultrasonic waves. Moreover, it does not interfere with the normal discharge of the treated upper layer of clean water from the drain pipe 104, ensuring the orderly progress of the treatment process.

[0021] Preferably, the treatment box 101 is provided with a gas supply pipe 206, which is a plurality of parallel horizontal pipes. Adjacent horizontal pipes are interconnected by a connecting riser. The gas inlet end of the gas supply pipe 206 extends out of the side wall of the treatment box 101 and is connected to an ozone generator. Each horizontal pipe has a nozzle 207 evenly fixed at the top. Ozone can be evenly released into the wastewater in the treatment box 101 through the nozzle 207, ensuring that the ozone concentration in different areas of the box is uniform and avoiding local ozone deficiency from affecting the degradation effect.

[0022] Preferably, multiple ultrasonic generators 205 are fixed on the inner sidewall of the treatment box 101. The ultrasonic generators 205 and ultrasonic transducers 209 are staggered. The ultrasonic generators 205 can excite the ultrasonic transducers 209 to generate stable vibrations through high-frequency electrical signals. The staggered distribution design can avoid mutual interference of ultrasonic signals, ensure uniform ultrasonic intensity in each area, and prevent the occurrence of treatment blind spots due to signal superposition and cancellation, thereby further ensuring the stability and uniformity of the overall wastewater treatment.

[0023] Preferably, the bottom of the rotating shaft 210 is fixed with a plurality of downwardly inclined fixing rods 211, and the ends of the fixing rods 211 are also fixed with ultrasonic transducers 209. The inclination angles of the fixing rods 211 are different, so that during the rotation of the rotating shaft 210, the ultrasonic transducers 209 located at the ends of the fixing rods 211 can perform ultrasonic treatment on wastewater at different depths in the treatment tank 101, filling the ultrasonic coverage gap in the middle area. At the same time, the rotation process can also disturb the wastewater, promote the full mixing of ozone and catalyst with the wastewater, and improve the mass transfer effect.

[0024] Preferably, the rotating shaft 210 is a threaded rod, and the stirring rod 208 is spirally connected to the rotating shaft 210. During the rotation of the rotating shaft 210, the resistance generated by the water flow can drive the stirring rod 208 to move slowly along the axial direction of the rotating shaft 210, so that the stirring rod 208 can drive the ultrasonic transducer to move in different height areas, further expanding the coverage of ultrasonic treatment and avoiding the problem of uneven treatment due to long-term treatment at the same depth. At the same time, the spirally moving stirring rod 208 can also enhance the exchange and mixing of wastewater between the upper and lower layers, further improving the contact efficiency of ozone, catalyst and wastewater pollutants, and enhancing the oxidation treatment effect.

[0025] Preferably, the bottom of the treatment box 101 is fixed with support legs 102, and the ozone generator 201 is fixed between the support legs 102. On the one hand, this can make reasonable use of the idle space at the bottom of the treatment box 101 and reduce the overall footprint of the device. On the other hand, the ozone generator 201 is closer to the air outlet at the bottom of the treatment box 101, and the ozone transport path is shorter, which can reduce ozone loss during the transport process and ensure a stable ozone concentration entering the treatment box 101.

[0026] Preferably, a sealing ring 212 is provided at the connection between the rotating shaft 210 and the treatment box 101, which can prevent wastewater in the treatment box 101 from leaking out from the gap between the rotating shaft 210 and the box body, improve the sealing performance of the device, and prevent wastewater leakage from causing environmental pollution.

[0027] Preferably, the top of the treatment box 101 is also provided with an exhaust port. Unreacted waste gas and non-condensable gases originally present in the wastewater can be discharged through the exhaust port. The exhaust port is provided with a pipe connected to the ozone decomposition device to prevent gas from accumulating on the top of the treatment box 101 and occupying the box space, thus affecting the effective volume of wastewater treatment. At the same time, it can also balance the air pressure inside the box and prevent excessive internal pressure from causing safety hazards. The ozone decomposition device is a commonly used device in the prior art that can decompose residual ozone. It can completely decompose the unreacted ozone in the discharged gas, preventing ozone from being directly emitted into the air, harming human health and polluting the atmospheric environment, and meeting the emission environmental protection requirements of the device.

[0028] Preferably, the bottom of the processing tank 101 is equipped with a drain valve. After processing, the impurities and residues settled at the bottom of the tank can be discharged through the drain valve, which facilitates cleaning and maintenance of the inside of the device and extends the service life of the device.

[0029] Preferably, the treatment box 101 is provided with a columnar alumina-based support for placing the catalyst. After the catalyst is loaded on the surface of the columnar alumina, it is filled into the interior of the treatment box. The columnar alumina-based support can provide sufficient attachment sites for the catalyst, ensuring that the catalyst is in full contact with wastewater and ozone, thereby improving the efficiency of the catalytic oxidation reaction.

[0030] Preferably, the ultrasonic generator 205 is an ultrasonic transducer that can be detachably installed on the outer wall of the treatment box 101. The outer wall of the treatment box 101 is provided with a mounting bracket for fixing the ultrasonic transducer. The mounting bracket is connected and fixed to the outer wall of the treatment box 101 by bolts, which facilitates quick disassembly and maintenance when the ultrasonic transducer malfunctions, without having to open the treatment box 101 for operation, thus reducing maintenance difficulty. The ultrasonic waves generated by the ultrasonic transducer can penetrate the wall of the treatment box 101 and enter the wastewater to be treated. Through the ultrasonic cavitation effect, a local high temperature and high pressure environment is generated, which can not only enhance the dispersion effect of ozone in the wastewater and increase the contact area between ozone and organic pollutants, but also promote the generation of more active free radicals on the catalyst surface, thereby improving the overall oxidation and degradation efficiency.

[0031] Preferably, the ozone generator 201 is embedded in a sealed mounting groove at the bottom of the treatment box 101. The output end of the ozone generator 201 extends into the interior of the treatment box 101 and is connected to a horizontally arranged gas distribution plate. The gas distribution plate has a gas storage chamber inside, which is connected to the gas supply pipe 206. The gas storage chamber is used to temporarily store ozone, avoiding the problem of concentrated ozone output leading to excessively high local concentrations and most of the ozone overflowing into the wastewater before fully reacting with pollutants, thereby improving the utilization rate of ozone.

[0032] Preferably, the ozone generator 201 is an FL-810 ozone generator, whose output power can be adjusted according to the volume of the treatment tank 101 and the concentration of wastewater inlet, so as to reduce unnecessary energy consumption while meeting the treatment requirements. A EPDM rubber sealing ring 212 is provided between the sealing installation groove and the outer wall of the ozone generator 201, which can prevent water vapor in the treatment tank 101 from seeping out along the gap, ensuring the sealing and safety of the equipment operation. At the same time, EPDM rubber can withstand continuous corrosion in the ozone oxidation environment.

[0033] Preferably, the volume of the treatment box 101 is 8m³ to 12m³, and the box body is welded from 304 stainless steel with a thickness of not less than 10mm. The inner wall is coated with a food-grade polytetrafluoroethylene anti-corrosion layer, which can not only ensure the structural strength of the box body, but also avoid corrosion caused by long-term contact with wastewater, thus extending the overall service life of the device. The top of the box body is equipped with an openable and sealed maintenance door, which facilitates the staff to inspect and replace the internal components.

[0034] Preferably, the ozone generator 201 is an oxygen-source water-cooled discharge generator, and the rated ozone output is selected according to the effective volume of the treatment tank 101 and the wastewater treatment load. The device shortens the ozone delivery pipeline by relying on the low-position installation structure between the bottom support legs 102, reducing gas delivery loss, and enhances gas-liquid mass transfer by coupling the multi-layer gas delivery pipe 206 and rotating ultrasonic transducer 209 inside the tank. For standard treatment tanks of 8m³ to 12m³, the intermittent single-batch treatment conditions are equipped with ozone generators of 300g / h, 400g / h, and 500g / h respectively, and the maximum water treatment capacity for continuous cycle conditions corresponds to 4m³ / h to 6m³ / h. The ozone generator is equipped with a frequency conversion power adjustment of 30% to 100%, which can automatically match the ozone output according to the COD and color load of the influent. The ozone exhaust gas destruction device at the top of the tank can monitor the residual ozone concentration in real time and adjust the generator output accordingly to avoid excessive ozone escape and optimize ozone reagent consumption while ensuring that the wastewater degradation meets the standards.

[0035] Preferably, two ozone generators 201 can be symmetrically arranged. The two ozone generators 201 are respectively installed in the bottom gap between the support legs 102 on both sides of the treatment box 101. The gas outlet of each device is independently connected to a set of transverse gas transmission pipes 206 inside the box, forming a dual-path independent gas distribution system. The two ozone generators 201 can operate synchronously or start and stop independently. The total ozone output capacity of the whole machine can be flexibly adjusted according to the wastewater pollutant load. The dual-side low-position installation layout can further shorten the single-path ozone transmission pipeline, reduce gas loss along the way, and the two ozone paths are evenly distributed to all nozzles 207 at the bottom of the box, effectively avoiding the problems of uneven local gas distribution and excessively rapid bubble accumulation and floating when a single generator supplies gas.

[0036] Preferably, the nozzle 207 is made of 316 stainless steel, and the internal flow channel is mirror polished to prevent the flow channel from being blocked by suspended matter in the wastewater. At the same time, the excellent corrosion resistance can extend the service life of the nozzle 207 in complex wastewater environments. The outlet of each nozzle 207 is oriented at an angle of 15° to 30° with the horizontal plane, so that ozone can form a spiral rolling flow in the wastewater, prolonging the residence time of ozone in the water, allowing ozone to fully mix and contact with the wastewater, and further improving the efficiency of ozone in oxidizing and decomposing pollutants.

[0037] Preferably, all nozzles 207 are connected to the main gas supply pipe 206 through gas supply branch pipes, which can ensure that the ozone pressure output by each nozzle 207 is stable and avoid the difference in treatment effect caused by uneven local gas output.

[0038] In practical use, an ultrasonic-ozone coupled catalytic oxidation wastewater treatment device according to an embodiment of this application is as follows: The industrial wastewater to be treated is uniformly introduced into the treatment tank 101 through the inlet pipe 103. The inlet flow rate is controlled according to the effective volume of the treatment tank 101. After the wastewater fills to the set working level of the tank, the inlet is closed or a continuous inlet is maintained to ensure stable wastewater treatment conditions inside the tank. At the same time, the ozone generator 201, the ultrasonic generation system, the stirring motor 202, and the drive pump 204 on the return pipe 203 are started in advance to complete the equipment preheating and operation condition debugging, ensuring that all components are in normal working condition and preparing for the subsequent coupled oxidation reaction. Subsequently, after the ozone generator 201 is started, it continuously produces high-concentration ozone. The ozone is introduced into the gas supply pipe 206 system inside the treatment tank 101 through the external pipeline. Then, the nozzles 207, which are evenly distributed at the top of each horizontal pipe, continuously spray ozone microbubbles into the wastewater in the tank, so that the ozone gas is fully dispersed in all areas of the wastewater. The stirring motor 202 works continuously, driving the rotating shaft 210 at the output end to rotate at a constant speed. The rotating shaft 210 drives multiple stirring rods 208, which are evenly distributed on the side wall, to rotate synchronously, stirring and disturbing the wastewater in the tank in all directions. This allows the ozone microbubbles injected into the wastewater to fully mix and contact with the wastewater and the catalyst in the water, greatly improving the gas-liquid mass transfer efficiency and promoting the initial oxidation reaction between ozone and wastewater pollutants. At the same time as the stirring operation, the ultrasonic system of the device is started simultaneously. The ultrasonic generators 205, which are staggered and distributed on the inner side wall of the treatment tank 101, output high-frequency electrical signals, stably exciting all the ultrasonic transducers 209 at the end of the stirring rods 208 and the end of the inclined fixed rod 211 at the bottom of the rotating shaft 210 to generate high-frequency ultrasonic vibrations. The rotating shaft 210 has multiple fixed rods 211 at different inclination angles at its bottom, which can achieve ultrasonic coverage of wastewater at different depth levels and fill the ultrasonic treatment blind spots in the middle of the tank. The stirring rod 208 is fixed on the bushing, which is spirally connected to the threaded rod type rotating shaft 210. During the rotation of the rotating shaft 210, the resistance of the water flow will push the bushing to spirally feed along the rotating shaft, so that the stirring rod 208 can slowly move along the axis of the rotating shaft 210 while rotating and stirring with the rotating shaft 210. The stirring motor 202 drives the rotating shaft 210 to rotate in both directions, so that the stirring rod 208 moves slowly up and down along the axis of the rotating shaft 210, driving the ultrasonic transducer 209 to complete the dynamic scanning ultrasonic treatment of the entire height, completely eliminating the dead corners of wastewater treatment and solving the problem of uneven ultrasonic treatment at fixed points. Ultrasonic waves continuously generate cavitation effects in wastewater. On one hand, they break down ozone molecules to generate hydroxyl radicals with stronger oxidizing power, significantly enhancing the overall oxidation and degradation capacity of the system and efficiently decomposing organic pollutants and large molecular impurities in the wastewater. On the other hand, through the dual action of high-frequency ultrasonic disturbance and mechanical stirring, the inner wall of the device and the surface of each working component are continuously washed, effectively preventing pollutant adsorption and deposition, and ensuring long-term stable operation of the device. Simultaneously, the staggered distribution of the side-wall ultrasonic generator 205 and the moving ultrasonic transducer 209 eliminates mutual interference and superposition of ultrasonic signals, ensuring uniform ultrasonic intensity in all areas of the chamber, further improving treatment uniformity and stability.During the entire treatment process, the drive pump 204 on the return pipe 203 operates continuously, extracting the incompletely reacted wastewater from the bottom of the treatment tank 101 in real time. This wastewater is then transported to the upper part of the treatment tank 101 through the return pipe 203, allowing the insufficiently degraded wastewater to re-enter the core reaction area and repeatedly participate in the ozone oxidation and ultrasonic-enhanced coupled reaction process. Through this reciprocating circulation treatment, the wastewater reaction residence time is significantly extended, allowing recalcitrant pollutants to fully react with active free radicals and ozone, thoroughly solving the problem of incomplete degradation in a single treatment and significantly improving the overall wastewater treatment effect. Simultaneously, the spiral-moving stirring rod 208 enhances the convection exchange between the upper and lower layers of wastewater in the tank, further improving the contact efficiency between the circulating wastewater and the oxidant and catalyst, thus strengthening the coupled treatment effect.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An ultrasonic-ozone coupled catalytic oxidation wastewater treatment device, comprising a treatment tank (101), an inlet pipe (103), and an outlet pipe (104). Its features are, It also includes a wastewater treatment component (200); The wastewater treatment assembly (200) includes an ozone generator (201), a stirring motor (202), a return pipe (203), a drive pump (204), a nozzle (207), a stirring rod (208), an ultrasonic transducer (209), and a rotating shaft (210). The ozone generator (201) is fixed to the bottom outside of the treatment box (101), and multiple nozzles (207) are fixed to the bottom inside the box. The nozzles (207) and the ozone generator (201) are connected. The stirring motor (202) is fixedly installed at the top center of the processing tank (101). The output end of the stirring motor (202) is connected to the rotating shaft (210) with the shaft facing downward. The rotating shaft (210) extends vertically into the processing tank (101). Multiple stirring rods (208) are evenly fixed on the side wall of the rotating shaft (210) along the length direction of the rotating shaft (210). The ends of the stirring rod (208) are all fixed with ultrasonic transducers (209). One end of the return pipe (203) is connected to the bottom of the processing box (101), and the other end is connected to the top of the processing box (101). The drive pump (204) is installed on the return pipe (203).

2. The ultrasonic-ozone coupled catalytic oxidation wastewater treatment device as described in claim 1, characterized in that, The processing box (101) is equipped with an air supply pipe (206). The gas transmission pipe (206) includes multiple parallel transverse pipes, and adjacent transverse pipes are connected by a connecting riser. The air inlet of the gas pipe (206) extends through the side wall of the treatment box (101) and is connected to the ozone generator (201). Several nozzles (207) are evenly fixed on the top of each of the transverse pipes.

3. The ultrasonic-ozone coupled catalytic oxidation wastewater treatment device as described in claim 1, characterized in that, Several ultrasonic generators (205) are fixedly installed on the inner side wall of the processing box (101). The ultrasonic generator (205) and the ultrasonic transducer (209) at the end of the stirring rod (208) are staggered. The ultrasonic generator (205) is used to output a high-frequency electrical signal to excite the ultrasonic transducer (209) to vibrate stably.

4. The ultrasonic-ozone coupled catalytic oxidation wastewater treatment device as described in claim 1, characterized in that, The bottom of the rotating shaft (210) is fixed with multiple downwardly inclined fixing rods (211), and the inclination angles of the multiple fixing rods (211) are different. An ultrasonic transducer (209) is fixedly installed at the end of each fixing rod (211).

5. The ultrasonic-ozone coupled catalytic oxidation wastewater treatment device as described in claim 4, characterized in that, The rotating shaft (210) is configured as a threaded rod; The stirring rod (208) is spirally connected to the rotating shaft (210), and the stirring rod (208) can reciprocate along the axial direction of the rotating shaft (210) under the action of water flow resistance.

6. The ultrasonic-ozone coupled catalytic oxidation wastewater treatment device as described in claim 1, characterized in that, The bottom of the processing box (101) is fixedly equipped with a support leg (102); The ozone generator (201) is fixedly installed in the gap between each support leg (102).

7. The ultrasonic-ozone coupled catalytic oxidation wastewater treatment device as described in claim 1 or 5, characterized in that, A sealing ring (212) is provided at the through connection between the rotating shaft (210) and the processing box (101). The sealing ring (212) is fitted on the outside of the rotating shaft (210) and is sealed and fitted to the processing box (101).

8. The ultrasonic-ozone coupled catalytic oxidation wastewater treatment device as described in claim 1, characterized in that, The top of the treatment box (101) is provided with an exhaust port for discharging waste gas and non-condensable gases.

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