Ozone synchronous multiple catalytic oxidation system and application thereof

Abstract

The application relates to an ozone synchronous multiple catalytic oxidation system and application thereof, and belongs to the technical field of sewage treatment systems. Mainly comprising an ozone generating device, an air inlet liquid pipe, a gas-liquid booster pump and an ozone catalytic oxidation pool. The gas-liquid booster pump is arranged to connect the ozone generating device and a sewage source to realize simultaneous air inlet and water inlet, greatly improve the concentration of ozone in water, and is higher than the solubility of ozone at the end of water in a traditional jet device air-water mixing technical scheme. High-concentration dissolved ozone can better promote the oxidation effect on dissolved pollutants. The technical scheme of generating high-concentration ozone water through gas-liquid synchronous pressurization and dissolution can better promote the removal of pollutants by ozone oxidation.

Description

TECHNICAL FIELD

[0001] The present application relates to an ozone synchronous multiple catalytic oxidation system and its application, belonging to the technical field of wastewater treatment system. BACKGROUND

[0002] Industrial wastewater mostly contains refractory organic pollutants, which have the characteristics of complex composition, high concentration, high turbidity and toxicity. As we all know, wastewater treatment plants are an important means to effectively control such wastewater, but with the further improvement of more stringent wastewater discharge standards, the traditional "biochemical method + coagulation sedimentation + disinfection" wastewater treatment process cannot meet the discharge standards. In view of this, wastewater treatment plants often use membrane separation method, adsorption method, ozone advanced oxidation method and other methods for advanced treatment. Among them, ozone advanced oxidation method is favored because it can effectively oxidize refractory organic matter and has no secondary pollution.

[0003] However, in the actual application process, ozone advanced oxidation method has also gradually exposed some problems. First, the solubility of ozone in water at normal temperature and pressure is low, so a large amount of ozone needs to be added in the actual wastewater treatment process, causing waste of ozone and increasing the treatment cost in the operation process. Second, although ozone itself is an oxidant, its ability to oxidize organic matter is limited and cannot completely degrade organic matter, so the effect of ozone alone in wastewater treatment is limited. Therefore, developing efficient ozone catalysis technology has become a hot spot in the field of industrial wastewater treatment.

[0004] In the prior art, methods such as micro-nano bubbles (Chinese patent CN 112058107 A), ozone pressurization (Chinese patent CN203284204U, Chinese patent CN 208103931 U) can improve the concentration of ozone in water, however, the oxidation efficiency of ozone itself has not been improved. Therefore, using heterogeneous catalysts (Chinese patent CN 102070238A, Chinese patent CN104418423A) to catalyze ozone to generate hydroxyl radicals can effectively improve the oxidation efficiency of ozone alone, but the catalyst is easy to be caked and deactivated in the actual wastewater treatment process. Therefore, it is necessary to develop supporting equipment to simultaneously improve the concentration of ozone and the oxidation efficiency of ozone.

[0005] At present, although the basic structure of ozone catalytic oxidation of gas-liquid mixing is shown in CN211170044U, due to the fact that the gas-liquid mixing method adopts a jet mixer and the catalyst arrangement method is a bed layer with a certain thickness, there are problems such as large bubble size after ozone mixing, low ozone solubility, low ozone utilization rate, easy wear of catalyst bed layer disturbance, and large kinetic energy consumption of gas-liquid mixing through the catalyst bed layer, which leads to the inability to achieve the purpose of efficient utilization of ozone and efficient catalytic oxidation of pollutants.

[0006] In addition, the current ozone catalytic oxidation system, although having a structure such as CN117699950A to form a rotational flow state gas-liquid mixed fluid, adopts a front end pressurization technical solution of separately pressurizing ozone gas and reflux liquid and then mixing them in a water-gas high-frequency cutting dissolved gas device. First, ozone gas is separately compressed, which causes heat decay and ozone decomposition, resulting in excessive ozone loss and low utilization rate. Second, the rotational flow in the water-gas high-frequency cutting dissolved gas device only has the function of mixing gas and water, which increases the residence time of ozone before reaching the subsequent catalytic oxidation unit, and ozone is not immediately subjected to catalytic oxidation in the unit, which further decays and decomposes ozone, resulting in a decrease in ozone utilization rate. SUMMARY

[0007] To solve the above problems, in a first aspect, the present application provides an ozone synchronous multiple catalytic oxidation system, comprising:

[0008] an ozone generating device for generating ozone;

[0009] a gas inlet liquid pipe bifurcated into a main pipe and a secondary pipe for passing sewage;

[0010] a gas-liquid booster pump connected with the ozone generating device and the secondary pipe; and

[0011] an ozone catalytic oxidation tank connected with the gas-liquid booster pump and the main pipe;

[0012] wherein the ozone catalytic oxidation tank comprises a main port and a secondary port at the bottom, a liquid outlet at the top, and a sleeve connecting the center position of the bottom and the top inside the tank, the sleeve is provided with an ultraviolet lamp, and the inner wall of the ozone catalytic oxidation tank is attached with a heterogeneous multi-metal activated carbon fiber material.

[0013] Further, the ozone generating device comprises a pure oxygen tank and an ozone generator connected with the pure oxygen tank. A gas check valve, a gas flow valve, and a gas flow meter are arranged between the ozone generator and the gas-liquid booster pump, and a liquid check valve, a liquid flow valve, and a liquid flow meter are arranged on the secondary pipe.

[0014] In an embodiment of the present application, the ozone catalytic oxidation tank is a conical cylinder structure. The advantage of this structure is that the rotational flow radius formed by the water entering the lower part is large, the water passing section is large, the flow rate is relatively low, and the residence time is relatively long. Since the pollution concentration is the highest just after entering, a longer residence time is required for catalytic oxidation. As the rotational flow rises, the pollution concentration decreases, but the remaining substances are more difficult to degrade. The upper part of the conical cylinder structure has a smaller radius, the rotational flow is closer to the ultraviolet lamp, the ultraviolet light intensity is greater, the catalytic oxidation intensity is higher, and the catalytic oxidation of the refractory organic matter is strengthened.

[0015] Further, the secondary through pipe is connected with the secondary through hole along the tangential direction of the bottom circumference of the ozone catalytic oxidation tank, and the primary through pipe is connected with the primary through hole, so that the rising spiral flow and turbulent flow of the sewage can be formed between the sleeve and the inner wall of the ozone catalytic oxidation tank after the sewage passes through the secondary through pipe and the secondary through hole, and the circulation and conversion of the inner and outer sides of the sewage are continuously carried out, wherein the inner side refers to the side close to the ultraviolet lamp inside the ozone catalytic oxidation tank, and the outer side refers to the side close to the heterogeneous multi-metal active carbon fiber material inside the ozone catalytic oxidation tank; the rising spiral flow of the sewage is continuously turbulent and converted between the inner and outer sides, and under the synchronous multi-catalytic oxidation of ozone, the polycyclic aromatic hydrocarbons, polychlorinated biphenyls or azo dyes in the sewage can be significantly removed, and the sleeve is a quartz sleeve.

[0016] Further, the specific preparation method of the homogeneous multi-metal active carbon fiber material comprises the following steps:

[0017] Firstly, FeCeTi sol is prepared by dissolving a certain amount of ferric nitrate, cerium nitrate and tetrabutyl titanate in anhydrous ethanol, then adding a certain amount of acetylacetone, adjusting the pH to 4-5 by using concentrated nitric acid or concentrated hydrochloric acid, adding a certain amount of polyethylene glycol after continuous stirring for a period of time, and then continuously stirring at 20-80 DEG C in a water bath for 1-4 h to obtain FeCeTi sol, which is aged at room temperature for 5-15 h; secondly, the active carbon fiber felt is immersed in the FeCeTi sol by using the impregnation method, and then dried after being taken out; after repeating the immersion for 3 times, the active carbon fiber felt is dried and then calcined at a temperature above 200 DEG C to prepare the heterogeneous multi-metal active carbon fiber material, which can promote the generation of hydroxyl radicals in combination with UV to improve the utilization efficiency of ozone.

[0018] In an embodiment of the present application, the UV wavelength generated by the ultraviolet lamp is 254 mm, and the generation of hydroxyl radicals can be promoted by UV / O3 or UV / heterogeneous multi-metal active carbon fiber material.

[0019] In a second aspect, the present application provides a method for treating sewage by using the ozone synchronous multi-catalytic oxidation system, which comprises the following steps:

[0020] S1: the sewage is introduced into the ozone catalytic oxidation tank through the primary through pipe until the ozone catalytic oxidation tank is filled with the sewage;

[0021] S2: the gas-liquid booster pump is opened, the liquid flow valve is opened and adjusted, and the sewage is introduced into the ozone catalytic oxidation tank through the secondary through pipe, so that the liquid flow meter on the secondary through pipe is controlled at a level of 0.1-1 m3 / h;

[0022] S3: the ultraviolet lamp is turned on, the power or illumination is controlled at a level of 100-300 W, and the UV catalytic oxidation reaction is started after the ozone is converged.

[0023] S4: sequentially open the ozone generation device, the gas flow valve between the ozone generation device and the gas-liquid booster pump, control the air flow into the ozone generation device at the level of 0.1-0.3 m3 / h, and then the gas-liquid booster pump starts to flow ozone gas into the ozone generation device and maintains a fixed proportion;

[0024] S5: mix ozone gas and sewage in the gas-liquid booster pump, and control the gas-water ratio condition at 10:1-1:1, so that the sewage saturated with dissolved and nanobubble gaseous ozone enters from the bottom of the ozone catalytic oxidation tank, and the difficult-to-degrade organic matter such as polycyclic aromatic hydrocarbons, polychlorinated biphenyls or azo dyes is removed under the double catalytic oxidation of ultraviolet lamps and heterogeneous multi-metal activated carbon fiber materials, and finally the treated sewage is discharged from the liquid outlet.

[0025] In an embodiment of the present application, the gas-liquid booster pump is controlled to increase the pressure of the ozone and sewage mixture to 0.1-0.4 MPa, and through the gas-liquid mixing and pressurizing process, the liquid can absorb the heat generated by gas compression due to its large specific heat capacity, and the temperature does not rise significantly, avoiding ozone thermal decay. Gas dissolution increases with increasing pressure, and pressurization to 0.1-0.4 MPa can significantly increase the concentration of dissolved liquid ozone in the liquid, and can improve the effect of catalytic oxidation.

[0026] In a third aspect, the present application also provides the application of the method in treating municipal domestic sewage, dyeing industry sewage, electroplating industry sewage and photovoltaic industry sewage.

[0027] The beneficial effects of the present application are:

[0028] 1、The present application connects the ozone generation device and the sewage source by setting the gas-liquid booster pump to realize simultaneous air and water intake, greatly improve the concentration of ozone in water, and the solubility of ozone at the end of the water is higher than that of the traditional jet device gas-water mixing technical solution. High concentration of dissolved ozone can better promote the oxidation effect of dissolved pollutants, and the technical solution of gas-liquid synchronous pressurization and dissolution of high-concentration ozone water can better promote the removal of pollutants by ozone oxidation. At the same time, the liquid and gas are mixed together and pressurized during the gas-liquid synchronous pressurization process, and since the liquid has a large specific heat capacity, the heat generated by gas compression is quickly absorbed by the liquid, and the temperature rises very little. The gas-liquid synchronous pressurization can solve the problem of heat decomposition and decay of traditional ozone pressurization alone, and improves the utilization rate of ozone.

[0029] 2. In the gas-liquid mixture generated by synchronous gas-liquid pressurization, on the one hand, the concentration of dissolved ozone in the water will increase due to the pressurization effect. On the other hand, the undissolved ozone will be dispersed in the liquid as nano-sized bubbles after pressurization by the gas-liquid booster pump. These bubbles are stably dispersed in the liquid phase. When the dissolved ozone is consumed, the ozone in the nano-bubbles can be quickly replenished into the liquid. Therefore, the use of the gas-liquid booster pump in the system enhances the gas-liquid mass transfer process.

[0030] 3. The ozone catalytic oxidation tank uses a water inlet design along the tangential direction of the bottom of the conical ozone catalytic oxidation tank. This ensures that the mixture of ozone and wastewater forms a swirling, upward flow. Even if dissolved ozone is released as a gas, it remains mixed in the wastewater within the turbulent swirling flow. Simultaneously, the nanobubbles generated by the front-end gas-liquid booster pump maintain continuous contact with the wastewater, catalyst, and UV radiation due to their good dispersion stability, rather than rapidly rising to the liquid surface and dissipating, resulting in high ozone utilization. The combination of the gas-liquid booster pump and the novel ozone catalytic oxidation tank significantly improves ozone utilization.

[0031] 4. The combined use of heterogeneous multi-metallic carbon fiber materials and UV radiation promotes the generation of hydroxyl radicals from ozone, improving ozone utilization efficiency. As wastewater rotates and rises tangentially along the tank, the area near the center of the ozone catalytic oxidation tank benefits from UV / O3-promoted hydroxyl radical generation, while the area near the inner wall utilizes heterogeneous multi-metallic carbon fiber materials adhered to the inner surface to efficiently generate hydroxyl radicals from ozone, significantly enhancing wastewater treatment. This simultaneous use of heterogeneous catalysts and UV catalytic oxidation, arranged within the same reactor's swirling flow, rather than a segmented arrangement, saves space in the reaction tank, reduces the overall system volume, and conserves space.

[0032] 5. The heterogeneous multi-metal carbon fiber material is attached to the inner surface of the conical structure of the ozone catalytic oxidation tank. The wastewater continuously rises in the tank through tangential swirling flow and comes into contact with the material to react. The surface of the heterogeneous multi-metal carbon fiber material always has a large wastewater flow velocity. Under the continuous water flow self-cleaning condition, sludge will not be deposited on the surface of the heterogeneous multi-metal activated carbon fiber material, which can avoid the problem of deactivation of heterogeneous catalytic materials due to scaling during the treatment process.

[0033] 6. The sleeve used for UV catalytic oxidation in the ozone catalytic oxidation tank is always surrounded by a swirling flow. Since the swirling flow also contains bubbles precipitated from the ozone water, the outer surface of the quartz sleeve is constantly washed by the gas-water mixture, thus having a self-cleaning function. This avoids the technical problem of reduced UV catalytic oxidation efficiency caused by the decrease in UV transmittance after the surface of the quartz sleeve is contaminated or covered with scale.

[0034] 7. The entire system draws water from the main inlet pipe and pressurizes it to dissolve ozone gas. The amount of water involved in pressurizing and dissolving the gas is small. Compared with the traditional jet gas dissolution technology where all wastewater participates in the circulating jet gas dissolution process, this invention adopts a technical solution of pressurized gas dissolution, swirling mixing, and simultaneous multiple catalysis. The required gas-water mixing energy consumption is smaller, and the process system is more energy-efficient and effective. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure in one embodiment of the present invention.

[0036] Figure 2 This is a perspective view of the ozone catalytic oxidation tank in one embodiment of the present invention.

[0037] In the diagram, 1: pure oxygen tank, 2: ozone generator, 3: gas check valve, 4: gas flow valve, 5: gas flow meter, 6: gas-liquid booster pump, 7: liquid check valve, 8: liquid flow valve, 9: liquid flow meter, 10: ozone catalytic oxidation tank, 101: secondary inlet, 102: sleeve, 103: ultraviolet lamp, 104: heterogeneous multi-metal activated carbon fiber material, 105: main inlet, 106: liquid outlet. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] 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.

[0041] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0042] Embodiment 1

[0043] The present application provides an ozone synchronous multiple catalytic oxidation system, comprising:

[0044] An ozone generating device for generating ozone, the ozone generating device comprising a pure oxygen tank 1 and an ozone generator 2 connected with the pure oxygen tank 1. A gas check valve 3, a gas flow valve 4 and a gas flow meter 5 are arranged between the ozone generator 2 and the gas-liquid booster pump 6, and a liquid check valve 7, a liquid flow valve 8 and a liquid flow meter 9 are arranged on the secondary pipe;

[0045] An air inlet liquid pipe bifurcated into a primary pipe and a secondary pipe for passing sewage;

[0046] A gas-liquid booster pump 6 connected with the ozone generator 2 and the secondary pipe; and

[0047] An ozone catalytic oxidation tank 10 connected with the gas-liquid booster pump 6 and the primary pipe;

[0048] The ozone catalytic oxidation tank 10 comprises a primary port 105 and a secondary port 101 at the bottom, a liquid outlet 106 at the top, a quartz sleeve 102 in the interior and connecting the center position of the bottom and the top, the quartz sleeve 102 containing an ultraviolet lamp 103, and a heterogeneous multi-metal activated carbon fiber material 104 attached to the inner wall of the ozone catalytic oxidation tank 10.

[0049] The ozone catalytic oxidation tank 10 is a conical cylindrical structure, and the advantage of this structure is that the cyclone radius formed by the water inlet at the lower part is large, the water passing section is large, the flow rate is relatively low, and the residence time is relatively long. Since the pollution concentration is the highest just after entering, a longer residence time is required for catalytic oxidation. With the cyclone rising, the pollution concentration decreases, but the remaining substances are more difficult to degrade. The upper part of the conical cylindrical structure has a smaller radius, the cyclone is closer to the ultraviolet lamp, the ultraviolet light intensity is larger, the catalytic oxidation intensity is higher, and the catalytic oxidation of the refractory organic matter is strengthened.

[0050] Further, the secondary through pipe is connected with the secondary through hole 101 along the tangential direction of the bottom circumference of the ozone catalytic oxidation tank 10, and the primary through pipe is connected with the primary through hole, so that the rising spiral flow and turbulent flow of the sewage can be formed between the sleeve pipe and the inner wall of the ozone catalytic oxidation tank after the sewage passes through the secondary through pipe and the secondary through hole, and the circulation and conversion of the inner and outer sides of the sewage can be continuously carried out, wherein the inner side refers to the side close to the ultraviolet lamp inside the ozone catalytic oxidation tank, and the outer side refers to the side close to the heterogeneous multi-metal active carbon fiber material inside the ozone catalytic oxidation tank; the rising spiral flow of the sewage is continuously turbulent and converted between the inner and outer sides, and under the synchronous multi-catalytic oxidation of ozone, the polycyclic aromatic hydrocarbons, polychlorinated biphenyls or azo dyes in the sewage can be significantly removed, and the sleeve pipe is a quartz sleeve pipe.

[0051] Further, the UV wavelength generated by the ultraviolet lamp is 254 mm, and the generation of hydroxyl radicals can be promoted by UV / O3 or UV / heterogeneous multi-metal active carbon fiber material.

[0052] Embodiment 2

[0053] The specific preparation method of the homogeneous multi-metal active carbon fiber material includes the following steps:

[0054] Firstly, FeCeTi sol is prepared by dissolving a certain amount of ferric nitrate, cerium nitrate and tetrabutyl titanate in anhydrous ethanol, then adding a certain amount of acetylacetone, adjusting the pH to 4-5 by using concentrated nitric acid or concentrated hydrochloric acid, adding a certain amount of polyethylene glycol after continuous stirring for a period of time, and then continuously stirring at 20-80 DEG C in a water bath for 1-4 h to obtain FeCeTi sol, which is aged at room temperature for 5-15 h; secondly, the activated carbon fiber felt is immersed in the FeCeTi sol by using the immersion method, and then dried after being taken out, and the immersion is repeated for 3 times, and then the activated carbon fiber felt is dried and calcined at a temperature of 200 DEG C or above to prepare the heterogeneous multi-metal active carbon fiber material, which can promote the generation of hydroxyl radicals by catalytic ozone in combination with UV, and improve the utilization efficiency of ozone.

[0055] Embodiment 3

[0056] The application provides a method for treating sewage by using an ozone synchronous multi-catalytic oxidation system, and the method comprises the following steps:

[0057] S1: the sewage is introduced into the ozone catalytic oxidation tank through the primary through pipe until the ozone catalytic oxidation tank is filled with the sewage;

[0058] S2: the gas-liquid booster pump is opened, the liquid flow valve is opened and adjusted, and the sewage is introduced into the ozone catalytic oxidation tank through the secondary through pipe, so that the liquid flow table on the secondary through pipe is controlled at 0.1-1 m 3 / h level, so that the pipeline is filled with water, and is ready to welcome the influx of ozone gas;

[0059] S3: Turn on the ultraviolet lamp, control the power or illumination at the level of 100-300 W, and wait for the ozone to be converged before starting the UV catalytic oxidation reaction by itself;

[0060] S4: Turn on the ozone generator, and the gas flow valve between the ozone generator and the gas-liquid booster pump in sequence, control the air flow into the ozone generator at the level of 0.1-0.3 m 3 / h, and then the gas-liquid booster pump starts to converge ozone gas into the ozone generator at a fixed ratio;

[0061] S5: Mix the ozone gas and sewage in the gas-liquid booster pump, and control the gas-water ratio at the level of 10:1-1:1, so that the sewage saturated with dissolved and nano-bubble gaseous ozone enters from the bottom of the ozone catalytic oxidation tank, and the refractory organic matter of the polycyclic aromatic hydrocarbon, polychlorinated biphenyl or azo dye type is removed under the dual catalytic oxidation of the ultraviolet lamp and the heterogeneous multi-metal activated carbon fiber material, and finally the treated sewage is discharged from the liquid outlet.

[0062] In S4, the gas-liquid booster pump is controlled to increase the pressure of the ozone and sewage mixture to 0.1-0.4 MPa, the purpose is to use the large specific heat capacity of the liquid to absorb the heat generated by the gas compression without obvious temperature rise through the gas-liquid mixing and pressurizing process, and to avoid ozone thermal decay. Gas solubility increases with increasing pressure, and pressurization to 0.1-0.4 MPa can significantly increase the concentration of dissolved ozone in the liquid, and can improve the effect of catalytic oxidation.

[0063] Example 4

[0064] The printing and dyeing wastewater source is treated using the method of Example 3, and the purpose is to remove azo dye substances:

[0065] Results: After 10 minutes of continuous ozone catalytic oxidation reaction, the removal rate of azo dyes is about 60%.

[0066] Comparative Example

[0067] The traditional device of not mixing ozone with water for pressurization, using heterogeneous multi-metal activated carbon fiber material and ultraviolet lamp for multiple simultaneous catalytic oxidation unit is used to treat printing and dyeing wastewater, only ozone is continuously introduced, and the rest of the conditions are the same as Example 4.

[0068] Results: After 10 minutes of reaction of ozone with printing and dyeing wastewater using the traditional device alone, the removal rate of azo dyes is about 35%.

[0069] Compared with the traditional equipment without the gas-liquid booster pump, without mixing ozone and sewage, without the heterogeneous multi-metal active carbon fiber material and the ultraviolet lamp for multiple synchronous catalytic oxidation unit, the removal rate is increased by 25%, and the catalytic oxidation effect advantage is remarkable.

[0070] Although the present application has been disclosed with reference to the preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make various modifications and modifications without departing from the spirit and scope of the present application, and therefore the protection scope of the present application should be defined by the claims.

Claims

1. An ozone simultaneous multiple catalytic oxidation system, characterized by, The application relates to a sewage treatment device, which comprises the following parts: an ozone generator for generating ozone; an air inlet liquid pipe which is bifurcated into a main pipe and a secondary pipe for passing sewage; an air-liquid booster pump connected with the ozone generator and the secondary pipe; and an ozone catalytic oxidation tank connected with the air-liquid booster pump and the main pipe. The ozone catalytic oxidation tank comprises a main inlet at the bottom, a secondary inlet, a liquid outlet at the top, a sleeve pipe in the inside and connected with the center of the bottom and the top, the sleeve pipe is provided with an ultraviolet lamp, and the inner wall of the ozone catalytic oxidation tank is attached with a heterogeneous multi-metal active carbon fiber material. The secondary pipe is connected with the secondary inlet along the tangent of the circumference of the bottom of the ozone catalytic oxidation tank, and the main pipe is connected with the main inlet, so that the rising spiral flow and turbulent flow can be formed between the sleeve pipe and the inner wall of the ozone catalytic oxidation tank after the sewage passes through the secondary pipe and the secondary inlet, and the circulation and conversion of the sewage inside and outside can be continuously carried out. The specific preparation method of the homogeneous multi-metal active carbon fiber material comprises the following steps: firstly, FeCeTi sol is prepared; secondly, the active carbon fiber felt is immersed in the FeCeTi sol by using the immersion method, and then the active carbon fiber felt is dried, repeated for three times, and finally the heterogeneous multi-metal active carbon fiber material is prepared by calcining the active carbon fiber felt at a temperature above 200 DEG C. The ozone generator and the air-liquid booster pump are provided with a gas check valve, a gas flow valve and a gas flow meter, and the secondary pipe is provided with a liquid check valve, a liquid flow valve and a liquid flow meter. The ozone catalytic oxidation tank is a conical cylinder structure. The sleeve pipe is a quartz sleeve pipe. The UV wavelength generated by the ultraviolet lamp is 254 mm. The method comprises the following steps: S1, sewage is passed into the ozone catalytic oxidation tank through the main pipe until the ozone catalytic oxidation tank is filled with the sewage; S2, the air-liquid booster pump is opened, the liquid flow valve is opened and adjusted, the sewage is passed into the ozone catalytic oxidation tank through the secondary pipe, and the liquid flow meter on the secondary pipe is controlled at the level of 0.1-1 m3 / h; S3, the ultraviolet lamp is turned on, the power or illumination is controlled at the level of 100-300 W, and the UV catalytic oxidation reaction is started after the ozone is converged; and S4, the ozone generator, the gas flow valve between the ozone generator and the air-liquid booster pump and the air-liquid booster pump are opened in sequence, the air inlet flow into the ozone generator is controlled at the level of 0.1-0.3 m3 / h, then the air-liquid booster pump starts to converge ozone gas into the ozone generator, and the ozone gas is converged at a fixed ratio. ​ ​ 2. The ozone synchronized multiple catalytic oxidation system according to claim 1, wherein, ​ 3. The ozone synchronized multiple catalytic oxidation system according to claim 2, wherein, ​ 4. The ozone synchronized multiple catalytic oxidation system according to claim 1, wherein, ​ 5. The ozone synchronized multiple catalytic oxidation system according to claim 4, wherein, ​ 6. The ozone synchronized multiple catalytic oxidation system according to claim 1, wherein, ​ 7. The method of treating wastewater using the ozone-synchronous multiple catalytic oxidation system according to claim 1, wherein, ​ ​ ​ ​ ​ S5: mixing ozone gas and sewage in the gas-liquid booster pump, and controlling the gas-water ratio condition at 10:1-1:1, so that the sewage saturated with dissolved and nano-bubble gaseous ozone enters from the bottom of the ozone catalytic oxidation tank, and the refractory organic matter of polycyclic aromatic hydrocarbons, polychlorinated biphenyl or azo dye class is intensively removed under the double catalytic oxidation of ultraviolet lamp and heterogeneous multi-metal activated carbon fiber material, and finally the treated sewage is discharged from the liquid outlet.

8. A method according to claim 7, wherein, Controlling the gas-liquid booster pump to increase the pressure of the ozone and sewage mixture to 0.1-0.4 MPa.

9. The use of the method of claim 7 in treating municipal domestic sewage, dyeing and printing industry sewage, electroplating industry sewage and photovoltaic industry sewage.

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