Method and device for degrading organic matter by centrifugal electro-catalysis and synergistic plasma discharge with inclined plate

Abstract

The present application belongs to the technical field of organic wastewater treatment, and particularly relates to a method and device for degrading organic matter by centrifugal electro-catalysis and inclined plate plasma discharge cooperation. The present application proposes a multi-stage electro-catalysis and plasma discharge device under inclined plate gas-liquid mixing by synergistic effect of electrochemical catalysis technology and plasma discharge technology, so as to realize efficient degradation of organic wastewater. The electro-catalytic degradation adopts a design of combination of multiple layers of dynamic electrode plates and static electrode plates, the height of the electrode on the dynamic electrode plate is gradually decreased from inside to outside, and the wastewater is forced to pass through multiple electrode plates by the centrifugal force to be forced electro-catalysis, which is helpful to enhance the degradation efficiency of electro-catalysis; the plasma discharge channel is designed as an inclined plate type, a thin liquid layer is effectively formed on the surface of the inclined plate, which is conducive to the plasma of micro-bubbles and the staggered flow of gas and liquid on the inclined plate, so that the contact between gas and liquid is more close, and the gas-liquid mass transfer effect in the plasma discharge channel is improved.

Description

Technical Field

[0001] This invention belongs to the field of organic wastewater treatment technology, and particularly relates to a method and apparatus for the synergistic degradation of organic matter by centrifugal electrocatalysis and inclined plate plasma discharge. Background Technology

[0002] With rapid industrialization and urbanization, the discharge of wastewater containing organic pollutants has been increasing, posing a significant threat to ecosystems and human health. However, traditional wastewater treatment technologies have obvious shortcomings in treating complex pollutants and recalcitrant organic matter, typically including poor adaptability to complex organic pollutants, limited removal efficiency, and the potential for secondary pollution.

[0003] In recent years, advanced oxidation technologies based on electrocatalysis and plasma have shown unique advantages in the degradation of organic pollutants, particularly in treating complex, toxic, or recalcitrant organic pollutants. Electrochemical catalysis generates highly reactive oxide species (especially ·OH radicals) through electrode reactions. These oxides can react with organic pollutants in the aqueous phase, degrading pollutant molecules. Plasma discharge technology ionizes gases through high voltage, generating a large number of active particles (such as electrons, ions, and free radicals). These active species possess strong oxidizing properties and can rapidly degrade organic pollutants.

[0004] Existing wastewater degradation systems are still unable to achieve the above degradation effects or have many shortcomings, such as:

[0005] The invention patent CN214829624U, entitled "A High-Efficiency Electrocatalytic Oxidation Treatment Device for Organic Wastewater," discloses a high-efficiency electrocatalytic oxidation treatment device for organic wastewater, including a pretreatment tank and a catalytic chamber. The device introduces wastewater through an inlet pipe, and under the filtration of first and second filter plates, effectively removes pollutants and impurities from the organic wastewater. After pretreatment in the tank, the content of impurities and pollutants in the water is significantly reduced. Although this method uses electrocatalytic technology to treat organic wastewater, the contact between the reactants and the electrodes is not uniform enough, resulting in poor decomposition effect and low energy utilization of the system.

[0006] The invention patent CN221759562U, entitled "An Integrated Plasma Micro-electrolysis Organic Wastewater Treatment Device," discloses an integrated plasma micro-electrolysis organic wastewater treatment device. The system includes a corona discharge reactor, a plasma power supply, and a high-voltage generator. The plasma power supply, after being boosted by the high-voltage generator, is connected to the corona discharge reactor to generate corona discharge, forming oxidizing active substances. Simultaneously, a micro-electrolysis reaction occurs on the grounded electrode block of the micro-electrolysis packing. The metal elements in the packing synergistically enhance plasma catalysis, improving the degradation efficiency of organic wastewater. Although this method can degrade organic matter by generating high-energy active particles through discharge, its degradation mechanism is relatively simple, relying solely on the high-energy active particles generated by discharge without combining electrocatalytic technology for synergistic degradation, thus resulting in low degradation efficiency.

[0007] The invention patent CN115215467B, entitled "A Plasma Catalytic Oxidation Treatment Device and Method," constructs a combined treatment system of plasma oxidation, photocatalytic oxidation, and multifunctional catalytic oxidation through reactor design. This system achieves the reuse of ultraviolet radiation and plasma exhaust gas during plasma oxidation and enables the recycling and oxidation of wastewater within the device. However, this patent only employs photocatalysis and does not incorporate electrocatalysis technology, resulting in significant shortcomings in its ability to treat complex organic pollutants, oxidation efficiency, and energy consumption. Furthermore, the use of a high-voltage pulsed AC power supply may lead to high energy consumption, and excessively high discharge voltage may burden the equipment, increasing energy consumption.

[0008] The invention patent CN 106517440 B, entitled "A Multifunctional and High-Efficiency Device for Generating Hydroxyl Radicals and Its Application," generates ozone using an ozone generator and delivers it to wastewater via a gas distributor. This design cannot guarantee airtightness and increases the complexity of the device. Furthermore, because CN 106517440 B does not incorporate a plasma discharge structure, the improvement in gas utilization is limited.

[0009] In summary, existing devices for the electrocatalytic synergistic plasma discharge degradation of organic wastewater still have the following problems in practical applications:

[0010] First, complex organic compounds are difficult to degrade. Some organic pollutants, especially those containing benzene rings, halogens, or elements such as sulfur and nitrogen, often require stronger oxidizing power to break their chemical bonds. However, oxide species (such as ·OH, ·O2) in conventional electrocatalytic processes are difficult to degrade. - The oxidizing capacity of the oxygen may not be sufficient to efficiently degrade these pollutants, thus limiting the degradation efficiency.

[0011] Second, the plasma discharge region is difficult to control. The generation process of plasma discharge is relatively complex, and the morphology and distribution of the discharge region are difficult to control precisely, which can easily lead to uneven energy distribution. Some regions may contain too many high-energy particles, while other regions may lack sufficient energy, resulting in uneven processing effects.

[0012] Third, relying on a single degradation technology. Actual wastewater typically contains multiple types of pollutants, and using a single technology may not be able to effectively degrade different types of pollutants simultaneously. Complex mixed wastewater may contain various inorganic and organic pollutants, and different pollutants respond differently to degradation technologies, leading to unsatisfactory treatment results. Summary of the Invention

[0013] To address the aforementioned problems, this invention combines electrochemical catalysis with plasma discharge technology to propose a novel wastewater degradation technology. By integrating a centrifugal structure with an inclined plate structure, centrifugal force forces the liquid to undergo multi-stage electrocatalysis, ensuring the step-by-step degradation of wastewater. The inclined plate structure effectively segments the liquid layer, forming a thinner layer, which facilitates microbubble plasma and improves gas-liquid mass transfer.

[0014] The wastewater degradation technology proposed in this invention includes two aspects.

[0015] In a first aspect, an organic matter degradation device combining centrifugal electrocatalysis and inclined plate plasma discharge is provided, comprising, from top to bottom, a power drive device, a waste liquid tank, an electrocatalytic degradation device, an oxygen bubble generator, a gas-liquid mass transfer plasma degradation device, and a collection tank, wherein the waste liquid tank is connected to the electrocatalytic degradation device, the electrocatalytic degradation device is connected to both the oxygen bubble generator and the gas-liquid mass transfer plasma degradation device, and the gas-liquid mass transfer plasma degradation device is equipped with an oxygen bubble generator;

[0016] The electrocatalytic degradation device includes an electrocatalytic reaction chamber and a static electrode disk fixed to the electrocatalytic reaction chamber by a support plate. A rotating shaft is fixed at the center of the static electrode disk, and a moving electrode disk is movably fitted on the rotating shaft. An annular positive electrode plate and an annular negative electrode plate are respectively provided on the static electrode disk and the moving electrode disk, and the positions of the annular positive electrode plate and the annular negative electrode plate are staggered. The electrode height on the annular negative electrode plate decreases gradually from the inside to the outside. The rotating shaft has a hollow structure and is connected to the electrocatalytic reaction chamber and the waste liquid tank.

[0017] The gas-liquid mass transfer plasma degradation device includes multiple gas-liquid mass transfer channels formed by multiple inclined plates. The upper part of each gas-liquid mass transfer channel is provided with a water inlet channel and a gas outlet channel that do not interfere with each other. Each inclined plate is provided with a positive electrode plate and a negative electrode plate. The wastewater after being degraded by the electrocatalytic degradation device enters the gas-liquid mass transfer channel through the water inlet channel. The bottom of each gas-liquid mass transfer channel is connected to a cavity, and the cavity is provided with an aeration pipe that communicates with the outside.

[0018] Furthermore, the power drive device includes a motor bracket connected to the top of the waste liquid tank and a rotor motor mounted on the motor bracket. The output end of the rotor motor is connected to the rotating shaft via a coupling. The rotating shaft passes through the electrocatalytic reaction chamber and the waste liquid tank. The rotating shaft has a hollow structure and is provided with a wastewater inlet communicating with the waste liquid tank. Wastewater fluid can flow from the waste liquid tank into the hollow part of the rotating shaft through the wastewater inlet, and can be discharged from multiple diffusion holes distributed on the rotating shaft and diffused to the surroundings by the centrifugal force generated by the rotation of the rotating shaft, so as to carry out an electrocatalytic reaction in the electrocatalytic reaction chamber.

[0019] Furthermore, multiple layers of annular positive and negative electrode plates are arranged on the static and moving electrode disks respectively, and they are interspersed in staggered position gaps; the wastewater fluid overflows the moving electrode disk step by step under the action of centrifugal force generated by the rotating shaft and is forced to pass through multiple layers of electrode plates for electrocatalysis; the electrocatalytic reaction chamber is connected to an exhaust port.

[0020] Furthermore, six inclined plates are symmetrically distributed on both sides of the interior of the gas-liquid mass transfer plasma degradation device. Positive and negative electrode plates are respectively arranged on the opposite surfaces of two adjacent inclined plates, and a gas-liquid mass transfer channel is formed between any two adjacent inclined plates. The aeration pipe is provided with multiple aeration holes. After the external air enters the aeration pipe, it is discharged into the cavity through the aeration holes. The generated bubbles rise further and enter the gas-liquid mass transfer channel to carry out a plasma discharge reaction with the wastewater liquid in the gas-liquid mass transfer channel. The organic wastewater flows downward into the cavity and the collection tank in sequence. After the bubbles carry out the plasma discharge reaction, they enter the electrocatalytic reaction chamber through the gas outlet channel to further improve the electrocatalytic degradation efficiency. Finally, the waste gas can be discharged from the exhaust port.

[0021] Furthermore, both the positive and negative electrode plates are coated with an insulating dielectric coating on their outer sides by an electroplating process; the insulating dielectric coating can form a dielectric barrier discharge and generate active substances such as ozone and hydroxyl radicals in water.

[0022] Furthermore, the oxygen bubble generator includes an air inlet pipe and an aeration outlet device. The air inlet pipe connects to the outside and the gas-liquid mass transfer channel, and the aeration outlet device connects to the electrocatalytic reaction chamber and the gas-liquid mass transfer channel. External air enters the gas-liquid mass transfer channel through the air inlet pipe to form ozone through a plasma discharge reaction. The ozone then enters the electrocatalytic reaction chamber through the aeration outlet device to continue participating in the electrocatalytic reaction.

[0023] Furthermore, the aeration outlet device is provided with micropores, which only allow gas to pass through but do not allow liquid or other substances to be discharged. The gas can enter the electrocatalytic reaction chamber through the micropores in the form of tiny bubbles.

[0024] Furthermore, the multiple inclined plates can divide the liquid layer into thinner liquid layers, each of which can come into contact with the gas to generate highly oxidizing active substances to promote the degradation of pollutants.

[0025] Secondly, the present invention proposes an organic matter degradation method, which requires the organic matter degradation device proposed in the first aspect, the method comprising:

[0026] Step 1: Introduce air into the aeration pipe and use an oxygen bubble generator to produce oxygen, so that the oxygen enters the electrocatalytic reaction chamber.

[0027] Step 2: After being transported to the waste liquid tank, the organic wastewater enters the hollow part of the rotating shaft;

[0028] Step 3: Start the rotor motor. Under the centrifugal force generated by the rotation of the rotating shaft, the organic wastewater diffuses into the electrocatalytic reaction chamber, making the organic wastewater evenly distributed in the electrocatalytic reaction chamber. The organic wastewater is forced to undergo multi-stage electrocatalysis, which improves the wastewater degradation efficiency. The degraded wastewater enters the gas-liquid mass transfer plasma degradation device through the water inlet channel.

[0029] Step 4: Connect the high-voltage power supply to discharge the positive and negative plates, forming a dielectric barrier plasma discharge, generating ozone and hydroxyl radicals in the water. The ozone and hydroxyl radicals act as strong oxidants to rapidly and effectively degrade organic pollutants in the wastewater, thus deeply degrading the organic wastewater. The generated ozone enters the electrocatalytic reaction chamber through the gas outlet channel, improving the electrocatalytic degradation efficiency.

[0030] Step 5: Pump the degraded wastewater into a collection tank for storage.

[0031] The beneficial effects of this invention are:

[0032] (1) The dynamic and static electrodes of the present invention are set in a wave-like manner, which further increases the reaction area of ​​electrocatalysis and improves the electrocatalytic degradation efficiency.

[0033] (2) In this invention, wastewater is input into the hollow part of the rotating shaft, and the height of the electrode on the moving electrode plate gradually decreases from the inside to the outside, so that the wastewater overflows from the moving electrode plate under the action of centrifugal force and is forced to undergo electrocatalysis.

[0034] (3) This invention integrates electrocatalysis and plasma discharge technologies. During electrocatalysis, active substances such as ozone and hydroxyl radicals (OH·) are generated on the electrode surface, which can effectively degrade organic pollutants and recalcitrant substances in organic wastewater. The organic wastewater after electrocatalysis is further subjected to plasma discharge. Through dielectric barrier plasma technology, a low-temperature plasma rich in active substances such as ozone, free radicals, electrons, and excited-state molecules is generated in the organic wastewater. These active substances have strong oxidizing capabilities, enabling deep degradation of organic wastewater. This synergistic effect not only degrades organic matter more thoroughly but also effectively shortens the degradation time and reduces energy consumption.

[0035] (4) The present invention designs the electrocatalytic degradation device as a centrifugal type and sets up a multi-layer ring electrode. Wastewater is input from the hollow rotating shaft. The electrode height on the ring negative plate of the moving electrode disk decreases step by step from the inside to the outside. Under the action of centrifugal force generated by the rotation of the rotating shaft, the fluid overflows the moving electrode disk step by step and is forced to undergo electrocatalysis. In the process of passing through the multi-layer electrode, the liquid is forced to contact the rotating and stationary electrodes multiple times, thereby realizing a continuous multi-stage electrocatalytic reaction, ensuring the step-by-step degradation of pollutants and improving the overall reaction efficiency.

[0036] (5) This invention designs the plasma channel as an inclined plate and the gas-liquid inlet and outlet channels as non-interfering structures. The inclined plate plasma channel effectively divides the liquid layer, forming a thinner layer, which is beneficial for microbubble plasmaization. The plasmaization of microbubbles generates a large number of active substances (such as ozone and hydroxyl radicals) at the gas-liquid interface. The gas and liquid flow alternately on the inclined plate, and these substances quickly dissolve into the liquid phase at the gas-liquid interface, reacting with pollutants. This not only improves the pollutant degradation efficiency but also reduces energy consumption. In addition, the non-interference of the gas-liquid inlet and outlet channels ensures that the ozone generated by plasma discharge enters the electrocatalytic degradation device, further enhancing the electrocatalytic degradation effect. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall device in one embodiment of the present invention.

[0038] Figure 2 for Figure 1 A schematic diagram of the main connection structure.

[0039] Figure 3 This is a schematic diagram of the structure of the combination of dynamic and static electrode disks in one embodiment of the present invention;

[0040] Figure 4This is a schematic diagram of the structure of the rotating shaft in one embodiment of the present invention.

[0041] Figure 5 This is a schematic diagram of the aeration pipe in one embodiment of the present invention;

[0042] Figure 6 This is a top view of an aeration outlet device according to one embodiment of the present invention;

[0043] Figure 7 This is a flowchart of an organic matter degradation method according to one embodiment of the present invention.

[0044] Explanation of reference numerals in the attached drawings: 1. Power drive device; 11. Rotor motor; 12. Coupling; 13. Motor bracket; 2. Electrocatalytic degradation device; 21. Static electrode disk; 211. First through hole; 22. Annular positive electrode plate; 23. Moving electrode disk; 231. Second through hole; 24. Annular negative electrode plate; 25. Rotating shaft; 251. Rotating shaft inlet; 252. Diffuser hole; 26. Support plate; 27. Electrocatalytic reaction chamber; 28. Exhaust port; 3. 1. Oxygen bubble generator; 31. Air inlet pipe; 32. Aeration outlet; 4. Gas-liquid mass transfer plasma degradation device; 41. Inclined plate; 42. Positive electrode plate; 43. Negative electrode plate; 44. Water inlet channel; 45. Air outlet channel; 46. Gas-liquid mass transfer channel; 47. Chamber; 48. Aeration pipe; 481. Aeration hole; 482. Air inlet; 5. Collection tank; 51. Degraded wastewater outlet; 6. Waste liquid tank; 61. Organic wastewater inlet; 7. DC pump. Detailed Implementation

[0045] 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, not all, of the embodiments of the present invention. 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.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] In this invention, the terms "first" and "second" are used only to distinguish similar components / parts in different positions or with different characteristics, and have no other limiting meaning; "upper" refers to the direction in which each component is away from the ground, and "lower" refers to the direction in which each component is away from the ground.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] like Figure 1 As shown, this invention provides an organic matter degradation device that combines centrifugal electrocatalysis and inclined plate plasma discharge. It includes, from top to bottom, a power drive unit 1, a waste liquid tank 6, an electrocatalytic degradation device 2, an oxygen bubble generator 3, a gas-liquid mass transfer plasma degradation device 4, and a collection tank 5. The waste liquid tank 6 is connected to the electrocatalytic degradation device 2, which is connected to both the oxygen bubble generator 3 and the gas-liquid mass transfer plasma degradation device 4. The gas-liquid mass transfer plasma degradation device 4 is equipped with the oxygen bubble generator 3. The bottom of the gas-liquid mass transfer plasma degradation device 4 is connected to the collection tank 5 via a DC pump 7. After preliminary degradation by the electrocatalytic degradation device 2, the organic wastewater in the waste liquid tank 6 enters the gas-liquid mass transfer channel to generate a gas-liquid two-phase solution containing microbubbles. The gas-liquid mass transfer plasma degradation device 4 can ionize and degrade the gas-liquid two-phase solution.

[0050] like Figure 2 As shown, the power drive device 1 includes a motor bracket 12 connected to the top of the waste liquid tank 6 and a rotor motor 11 installed on the motor bracket 12. The output end of the rotor motor 11 is connected to the rotating shaft 25 through a coupling 13. The rotating shaft 25 passes through the electrocatalytic reaction chamber 27 and the waste liquid tank 6. The rotating shaft 25 has a hollow structure and is provided with a wastewater inlet 251 that communicates with the waste liquid tank 6. Wastewater fluid can flow from the waste liquid tank 6 into the hollow part of the rotating shaft 25 through the wastewater inlet 251, and can be discharged from the multiple diffusion holes 252 distributed on the rotating shaft 25 and diffused to the surroundings by the centrifugal force generated by the rotation of the rotating shaft 25, so as to carry out electrocatalytic reaction in the electrocatalytic reaction chamber 27.

[0051] The electrocatalytic degradation device 2 includes an electrocatalytic reaction chamber 27 and a stationary electrode disk 21 fixed inside the electrocatalytic reaction chamber 27 by a support plate 26. The electrocatalytic reaction chamber 27 is connected to an exhaust port 28. A rotating shaft 25 is fixed at the center of the stationary electrode disk 21. A moving electrode disk 23 is movably fitted on the rotating shaft 25. The rotating shaft 25 passes through a first through hole 211 on the stationary electrode disk 21 and a second through hole 231 on the moving electrode disk 23. The rotor motor 11 drives the moving electrode disk 23 to rotate through a coupling 12 and the rotating shaft 25. Multiple layers of annular positive electrode plates 22 and annular negative electrode plates 24 are arranged on the stationary electrode disk 21 and the moving electrode disk 23, forming two multi-layered annular plate structures. There is a certain gap between each layer. The annular positive electrode plates 22 and annular negative electrode plates 24 are staggered and interpenetrate in the staggered gaps. The rotating shaft has a hollow structure and is connected to the electrocatalytic reaction chamber 27 and the waste liquid tank 6. Figure 3 In the example, the electrode height on the annular negative electrode plate 24 of the moving electrode disk 23 gradually decreases from the inside to the outside. Under the centrifugal force generated by the rotating shaft 25, the wastewater fluid overflows the moving electrode disk 23 step by step and is forced to undergo multi-stage electrocatalysis. Multi-stage electrocatalysis can gradually oxidize complex organic matter or recalcitrant substances, ensuring that pollutants are completely decomposed, greatly improving degradation efficiency and reducing energy consumption.

[0052] The gas-liquid mass transfer plasma degradation device 4 includes multiple gas-liquid mass transfer channels 46 formed by multiple inclined plates 41. Each gas-liquid mass transfer channel 46 has a water inlet channel 44 and a gas outlet channel 45 correspondingly arranged at its upper part. Each inclined plate 41 is provided with a positive electrode plate 42 and a negative electrode plate 43. The positive electrode plate 42 and the negative electrode plate 43 are connected to a high-voltage power supply through wires. The wastewater after being degraded by the electrocatalytic degradation device 2 enters the gas-liquid mass transfer channel 46 through the water inlet channel 44. The bottom of the gas-liquid mass transfer channel 46 is connected to a cavity 47, and the cavity 47 is provided with an aeration pipe 48 that communicates with the outside.

[0053] Furthermore, six inclined plates 41 are symmetrically distributed on both sides of the interior of the gas-liquid mass transfer plasma degradation device 4. Positive electrode plate 42 and negative electrode plate 43 are respectively arranged on the opposite surfaces of two adjacent inclined plates. A gas-liquid mass transfer channel 46 is formed between any two adjacent inclined plates. By applying a sufficiently high voltage between the positive and negative electrode plates, a dielectric barrier plasma discharge phenomenon is formed, thereby generating active substances such as ozone and hydroxyl radicals in the water, and deeply degrading organic wastewater. The aeration pipe 48 is provided with multiple aeration holes 481, and the air outlet channel 45 is fixed to the wall of the electrocatalytic reaction chamber 27 by a support rod.

[0054] The multiple inclined plates 41 can divide the liquid layer into thinner liquid layers. Each thinner liquid layer can come into contact with the gas to generate highly oxidizing active substances, and undergo sufficient mass transfer with the liquid, which is beneficial for microbubble plasmaization. During the plasma discharge reaction, the active components in the gas generate highly oxidizing active substances such as ozone and hydroxyl radicals through plasma action. These active substances have extremely high chemical reactivity and can quickly oxidize and decompose pollutants in the liquid, thereby achieving efficient degradation of pollutants.

[0055] Since the gas-liquid mass transfer channel 46 is formed by the inclined plate 41, the gas-liquid mass transfer channel 46 is a channel structure with a certain inclination or twist, which allows the gas and liquid to flow alternately in the gas-liquid mass transfer channel 46, expands the contact area between the gas and the liquid, and more efficiently transfers active substances in the gas, such as ozone and hydroxyl radicals, into the liquid, thereby improving the degradation efficiency.

[0056] After entering the aeration pipe 48, external air is discharged into the cavity 47 through the aeration hole 481. The generated bubbles rise further into the gas-liquid mass transfer channel 46 and undergo a plasma discharge reaction with the wastewater liquid in the gas-liquid mass transfer channel 46. The organic wastewater flows downward into the cavity 47 and the collection tank 5 in sequence. After undergoing the plasma discharge reaction, the bubbles enter the electrocatalytic reaction chamber 27 through the gas outlet channel 45, further improving the electrocatalytic degradation efficiency. The waste gas can finally be discharged from the exhaust port 28.

[0057] exist Figure 6 In the example, the aeration outlet device 32 has multiple air holes and can be installed above the air outlet channel 45 to facilitate uniform gas passage; the water inlet channel 44 is located on the outer periphery of the air outlet channel 45. When the liquid and gas enter and exit the gas-liquid mass transfer plasma degradation device 4, they pass through the water inlet channel 44 and the air outlet channel 45 respectively, and the two channels do not interfere with each other.

[0058] Furthermore, the outer sides of both the positive electrode plate 42 and the negative electrode plate 43 are covered with an insulating dielectric coating 49 by an electroplating process; the insulating dielectric coating 49 can form a dielectric barrier discharge and generate active substances such as ozone and hydroxyl radicals in water, preventing the electrodes from directly contacting the liquid.

[0059] Furthermore, the oxygen bubble generator 3 includes an air inlet pipe 31 and an aeration outlet device 32. The air inlet pipe 31 connects to the outside and the gas-liquid mass transfer channel 46, and the aeration outlet device 32 connects to the electrocatalytic reaction chamber 27 and the gas-liquid mass transfer channel 46. External air enters the gas-liquid mass transfer channel 46 through the air inlet pipe 31 to form ozone through a plasma discharge reaction. The ozone then enters the electrocatalytic reaction chamber 27 through the aeration outlet device 32 to continue participating in the electrocatalytic reaction.

[0060] Furthermore, the aeration outlet device 32 is provided with micropores, which only allow gas to pass through but do not allow liquid or other substances to be discharged. The gas can enter the electrocatalytic reaction chamber 27 through the micropores in the form of tiny bubbles, further enhancing the electrocatalytic degradation process.

[0061] Example 1

[0062] like Figure 7 As shown, this invention proposes a method for degrading organic matter, which requires the organic matter degradation device proposed in the first aspect. The method includes:

[0063] Step 1: Air is introduced into the aeration pipe 48 and the air inlet pipe 31, and oxygen is generated by the oxygen bubble generator 3. The oxygen enters the electrocatalytic reaction chamber 27 through the aeration outlet 32.

[0064] Step 2: The organic wastewater is transported to the waste liquid tank 6 through the organic wastewater inlet 61, and the organic wastewater enters the hollow part of the rotating shaft 25 through the rotating shaft inlet 251;

[0065] Step 3: When the organic wastewater enters the rotating shaft 25, the rotor motor is started. Under the centrifugal force generated by the rotation of the rotating shaft, the organic wastewater diffuses through the diffusion holes 252 to the electrocatalytic reaction chamber 27, so that the organic wastewater in the electrocatalytic reaction chamber 27 is evenly distributed. The organic wastewater is forced to undergo multi-stage electrocatalysis, which improves the wastewater degradation efficiency. The degraded wastewater enters the gas-liquid mass transfer plasma degradation device 4 through the water inlet channel 44.

[0066] Step 4: Connect the high-voltage power supply to discharge the positive plate 42 and the negative plate 43, forming a dielectric barrier plasma discharge, generating ozone and hydroxyl radicals in the water. The ozone and hydroxyl radicals act as strong oxidants to rapidly and effectively degrade organic pollutants in the wastewater, thus deeply degrading the organic wastewater. The generated ozone enters the electrocatalytic reaction chamber 27 through the gas outlet channel 45, improving the electrocatalytic degradation efficiency.

[0067] Step 5: Turn on the DC pump 7 to pump the degraded wastewater from the wastewater outlet 51 at the bottom of the cavity 47 into the collection tank for storage, and discharge the exhaust gas from the exhaust port 28.

[0068] The ozone generated by the plasma discharge of this invention can be fully mixed with the wastewater undergoing initial degradation through the gas outlet. This does not affect the downward flow of the liquid or the upward discharge of the gas. Kinetic energy exchange occurs between the gas and the liquid, resulting in a better degradation effect compared to CN106517440B, which directly introduces ozone into the wastewater.

[0069] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. An organic matter degradation device that combines centrifugal electrocatalysis with inclined plate plasma discharge, characterized in that, The device includes, from top to bottom, a power drive unit, a waste liquid tank, an electrocatalytic degradation unit, an oxygen bubble generator, a gas-liquid mass transfer plasma degradation unit, and a collection tank. The waste liquid tank is connected to the electrocatalytic degradation unit, and the electrocatalytic degradation unit is connected to both the oxygen bubble generator and the gas-liquid mass transfer plasma degradation unit. The gas-liquid mass transfer plasma degradation unit is equipped with an oxygen bubble generator. The electrocatalytic degradation device includes an electrocatalytic reaction chamber and a static electrode disk fixed to the electrocatalytic reaction chamber by a support plate. A rotating shaft is fixed at the center of the static electrode disk, and a moving electrode disk is movably fitted on the rotating shaft. An annular positive electrode plate and an annular negative electrode plate are respectively provided on the static electrode disk and the moving electrode disk, and the positions of the annular positive electrode plate and the annular negative electrode plate are staggered. The rotating shaft has a hollow structure and is connected to the electrocatalytic reaction chamber and the waste liquid tank. The gas-liquid mass transfer plasma degradation device includes multiple gas-liquid mass transfer channels formed by multiple inclined plates. The upper part of each gas-liquid mass transfer channel is provided with a water inlet channel and a gas outlet channel that do not interfere with each other. Each inclined plate is provided with a positive electrode plate and a negative electrode plate. The wastewater after being degraded by the electrocatalytic degradation device enters the gas-liquid mass transfer channel through the water inlet channel. The bottom of each gas-liquid mass transfer channel is connected to a cavity, and the cavity is provided with an aeration pipe that communicates with the outside. The static electrode disk and the moving electrode disk are respectively arranged with multiple layers of annular positive electrode plates and annular negative electrode plates, which are interspersed in staggered position gaps; the electrode height on the annular negative electrode plate of the moving electrode disk decreases step by step from the inside to the outside, and the wastewater fluid overflows the moving electrode disk step by step under the action of centrifugal force generated by the rotating shaft, forcing the wastewater to pass through the multiple layers of electrode plates step by step to be electrocatalyzed; the electrocatalytic reaction chamber is connected to an exhaust port. The inclined plates are six in number and symmetrically distributed on both sides of the interior of the gas-liquid mass transfer plasma degradation device. Positive and negative electrode plates are respectively arranged on the opposite surfaces of two adjacent inclined plates, and a gas-liquid mass transfer channel is formed between any two adjacent inclined plates. The aeration pipe is provided with multiple aeration holes. The oxygen bubble generator includes an air inlet pipe and an aeration outlet device. The air inlet pipe connects to the outside and the gas-liquid mass transfer channel, and the aeration outlet device connects to the electrocatalytic reaction chamber and the gas-liquid mass transfer channel. External air enters the gas-liquid mass transfer channel through the air inlet pipe to form ozone through a plasma discharge reaction. The ozone then enters the electrocatalytic reaction chamber through the aeration outlet device to continue participating in the electrocatalytic reaction. The aeration outlet device is provided with micropores, which allow gas to pass through but not liquids or other substances to be discharged. Gas can enter the electrocatalytic reaction chamber through the micropores in the form of tiny bubbles.

2. The organic matter degradation device according to claim 1, characterized in that, The power drive device includes a motor bracket connected to the top of the waste liquid tank and a rotor motor mounted on the motor bracket. The output end of the rotor motor is connected to the rotating shaft via a coupling. The rotating shaft passes through the electrocatalytic reaction chamber and the waste liquid tank. The rotating shaft has a hollow structure and is provided with a wastewater inlet connected to the waste liquid tank. Wastewater can flow from the waste liquid tank into the hollow part of the rotating shaft through the wastewater inlet, and can be discharged from multiple diffusion holes distributed on the rotating shaft and diffused to the surroundings by the centrifugal force generated by the rotation of the rotating shaft, so as to carry out electrocatalytic reaction in the electrocatalytic reaction chamber.

3. The organic matter degradation device according to claim 1, characterized in that, The outer sides of the positive and negative plates on the inclined plate are covered with an insulating dielectric coating by an electroplating process; the insulating dielectric coating can form a dielectric barrier discharge and generate ozone and hydroxyl radical active substances in water.

4. The organic matter degradation device according to claim 1, characterized in that, The multiple inclined plates can divide the liquid layer into thinner liquid layers, each of which can come into contact with the gas to generate highly oxidizing active substances to promote the degradation of pollutants.

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