Device for cooperatively treating source water through ozone and ultraviolet light catalysis and use method

Abstract

The invention discloses a device for cooperatively treating source water through ozone and ultraviolet light catalysis and a use method, and relates to the technical field of water treatment. Compared with a previous water treatment device, the water treatment device has the advantages that the decomposition efficiency of new pollutants in water is improved; the ultraviolet light catalytic efficiency is improved through pretreatment; a tank-type device and a ceramic membrane material are adopted, so that the ozone utilization rate is improved, and the contact time and solubility of ozone and water are improved; and fluorescent titanium dioxide is adopted as a catalyst, and fluorescent titanium dioxide catalyst slurry is uniformly coated on the surface of the inner wall of the tank-type device, so that the photocatalytic efficiency is improved. New pollutants are subjected to multiple degradation through ozone-ultraviolet light catalysis and fluorescent titanium dioxide-ultraviolet light catalysis, so that the emission standard is met.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and particularly relates to an ozone photocatalytic synergistic water source treatment device and a method for using the same. Background Art

[0002] In actual water bodies, there are various trace new pollutants. These new pollutants are numerous in types and complex in nature, but their concentrations are relatively low. In particular, those toxic organic pollutants that are difficult to degrade, easy to bioaccumulate, and have mutagenic, teratogenic, and carcinogenic effects pose great harm to human health. Traditional methods for treating slightly polluted water, such as the electrochemical method and the coagulation sedimentation plus chlorine disinfection method, cannot effectively remove the organic matter present in a dissolved state, and they are all on a laboratory scale and are difficult to promote and apply. Drinking water contaminated by new pollutants brings extremely serious harm to people's production and life. Therefore, people have to search for new treatment methods to ensure the safety of drinking water and people's health, and the combination of ultraviolet and ozone stands out, with its advantages in treating water being extremely prominent. In the existing publicly available technologies, although the ozone photocatalytic synergistic technology is also adopted, there are the following problems: the ozone oxidation and ultraviolet combined reactor uses a single-wavelength ultraviolet light source to catalyze ozone, and it cannot utilize different wavelengths of ultraviolet light for the specificity of different new pollutants; secondly, the contact time between ozone and water is short, the water body in the ozone reactor does not contact ozone sufficiently, and the ozone utilization rate is low; the photocatalytic efficiency is low.

[0003] In the existing Chinese patent with the publication number CN103979666A, an invention patent named "An integrated ozone photocatalytic reaction device" is disclosed. This invention is processed through an integrated ozone photocatalytic reaction device, which is small in volume and has a relatively fast reaction rate for the substances to be processed. It is extremely easy to cause insufficient reaction, resulting in a low ozone utilization rate, and the ultraviolet lamp set inside the device is not easy to disassemble, which is not conducive to the continuous use of the device. In the existing Chinese patent with the publication number CN105923697B, an invention patent named "Multistage photocatalytic ozone oxidation reactor and preparation method of its photocatalyst" is disclosed. In this invention, a titanium dioxide nanometer film is uniformly loaded on a metal corrugated wire mesh as the photocatalyst, and its adsorption capacity is weak, and the treatment effect on colored water bodies is poor. In the existing Chinese patent with the publication number CN116947198A, an invention patent named "Multistage photocatalytic ozone oxidation reactor and preparation method of its photocatalyst" is disclosed. This invention conducts ozone oxidation reaction through a tank reactor, sets the ultraviolet lamp outside the tank reactor, and only selects titanium dioxide as the photocatalyst, with its ozone utilization efficiency not being high and the catalytic efficiency of the ultraviolet lamp for the titanium dioxide photocatalyst not being high.

[0004] The existing process does not pretreat the source water, resulting in reduced photocatalytic efficiency and decomposition efficiency; the contact time between ozone and pollutants is short and the ozone utilization rate is low; the ultraviolet wavelength is not used to be specific to different types of new pollutants, resulting in low degradation rates for some new pollutants. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide an ozone-photocatalytic coordinated water source treatment device and a method of using the device.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions: Pre-treat the source water containing multiple new pollutants to improve the degradation efficiency; use ozone to further remove new pollutants in the water, use the specificity of new pollutants to different ultraviolet wavelengths, and coordinate multiple wavelengths of photocatalytic technology to perform secondary degradation of antibiotics to meet the effluent standards; use tank reactors, ceramic membrane partitions and recycling reverse methods to improve the utilization efficiency of ozone, increase the gas-liquid contact reaction time, and have a high ozone utilization rate; the ultraviolet light tube is easy to disassemble; the inner wall of the photocatalytic reactor uses fluorescent titanium dioxide material, which is excited by ultraviolet light to produce photoelectrons and holes, thereby improving the utilization efficiency of ultraviolet light; the degradation efficiency of new pollutants by the photocatalytic-ozone combined technology used is much higher than that of single-wavelength ultraviolet photocatalysis, single ozone, and single ultraviolet photocatalysis combined with ozone; the overall structural design is reasonable, safe and reliable. Specifically including the following contents.

[0007] An ozone-photocatalytic coordinated water source treatment device comprises: a photocatalytic reactor, a water inlet pretreatment system, a gas circulation system, and a water outlet system; the photocatalytic reactor is connected to the water inlet treatment system via a water inlet pipe and a water outlet pipe, and the photocatalytic reactor is connected to an ozone generator via an air inlet pipe and to an exhaust gas treatment system via an air outlet pipe.

[0008] In the photocatalytic reactor, catalysis is carried out through the photocatalytic oxidation tank. The liquid level gauge inside the photocatalytic oxidation tank is used to detect and ensure that a certain raw water level is maintained at the bottom of the photocatalytic oxidation tank, which can prevent the water outlet pump from running idle and play a liquid seal role. Each layer of the partition is made of ceramic membrane material to evenly distribute the ozone gas. Three ultraviolet lamps are symmetrically arranged between each layer of the partition to improve the catalytic effect of light on ozone. The ultraviolet lamps run through each layer of the photocatalytic oxidation tank longitudinally, and an ultraviolet lamp interface is set on the outside of the photocatalytic oxidation tank; the gas-liquid separator at the top of the photocatalytic oxidation tank is also provided with a gas outlet pipe and a water outlet pipe, and the bottom of the photocatalytic oxidation tank and the outer periphery of the water outlet pipe are fixed by the base support; the photocatalytic oxidation tank is provided with a pressure gauge to detect the internal pressure value of the photocatalytic oxidation tank to ensure the safe operation inside the photocatalytic oxidation tank; the photocatalytic oxidation tank is also provided with a plurality of observation holes, which are arranged between the partitions for replacing the partitions or ultraviolet lamps.

[0009] In the influent pre-treatment system, the raw water source is collected and pressurized by a water pump, and the output end is connected to the input end of a filter. The output end of the filter is connected to the input end of a membrane separation device. The output end of the membrane separation device is connected to an activated carbon tank. The output end of the activated carbon tank is connected to the input end of a liquid delivery pump. The output end of the liquid delivery pump is connected to the bottom water inlet of a photocatalytic oxidation tank.

[0010] The output end of the ozone gas generation system is connected to each layer of ceramic membrane partition, and ozone micro-nano bubbles are generated through the ceramic membrane partition. The input end of the gas circulation system is connected to the gas outlet of the gas-liquid separator, and the output end of the gas circulation system is connected to the output end of the ozone gas generation system.

[0011] In the effluent system, the input end of the activated carbon tank is connected to the output end of the gas-liquid separator, and the output end of the activated carbon tank is connected to an effluent tank.

[0012] The working method of the device for synergistically treating raw water by ozone ultraviolet photocatalysis includes the following steps: S1: After the raw water source is pressurized by a water pump, suspended impurities are removed through a filter and a membrane separation device, and adsorption and decolorization treatment are carried out in an activated carbon pool. S2: The raw water source is then transported to the bottom of the photocatalytic reactor by a liquid delivery pump.

[0013] S3: The ozone generator transports the generated ozone into the photocatalytic reactor.

[0014] S4: Ozone gas generates ozone micro-nano gas through the ceramic membrane partition arranged in the photocatalytic reactor, and undergoes catalytic oxidation with the ultraviolet lamp tubes arranged in the reaction chamber to generate free radicals.

[0015] S5: Ultraviolet rays excite the fluorescent titanium dioxide material coated on the inner wall of the photocatalytic reactor to generate free electrons and holes.

[0016] S6: A gravity type gas-liquid separator is adopted, and gas and liquid are separated hydrodynamically according to the density difference between gas and liquid.

[0017] In order to improve the aeration efficiency of the raw water source, the partition arranged inside the photocatalytic reactor adopts a ceramic membrane material, and a ceramic membrane with a pore diameter of 0.1 - 1 μm is used. Ozone gas enters the ceramic membrane pores at a relatively high pressure, and its dispersion in the liquid is precisely restricted by the membrane pores, so that ozone bubbles with a diameter in the micron level or even the nanometer level can be formed.

[0018] Ceramic membranes usually have a certain hydrophilicity, which helps the liquid to uniformly cover the membrane surface, thus providing a stable gas-liquid interface for bubble generation. The ozone micro-nano bubbles generated by the ceramic membrane are small in size and large in number, and are uniformly dispersed in the liquid, which can significantly improve the mass transfer efficiency of the gas-liquid interface and the dissolution efficiency of ozone.

[0019] In the photocatalytic reactor, a VUV, UVC, UVB, and UVA reaction chamber are sequentially arranged from bottom to top in the water flow direction. Among them, the direct photolysis ability of UVA is weak, and it is combined with a photocatalyst (such as TiO2) for advanced treatment.

[0020] The wavelength of ultraviolet light has specificity for the degradation of antibiotics, and ultraviolet light of different wavelengths shows different effects when removing different types of antibiotics. Among them: VUV (10~280 nm), perfluorinated compounds (perfluorooctanoic acid, perfluorooctane sulfonic acid); UVC (200-280 nm): pharmaceuticals and personal care products (quinolones (ciprofloxacin, ofloxacin), tetracyclines (tetracycline, oxytetracycline, doxycycline), sulfonamides (sulfamethoxazole, sulfadiazine), lincosamides (clindamycin), estrogens; UVB (280-315 nm): macrolide antibiotics (erythromycin, roxithromycin), endocrine disruptors (bisphenol A) UVA (315-400 nm): The photon energy is relatively low, usually not enough to directly cleave the chemical bonds of most antibiotic molecules, so its single photolysis effect is weak.

[0021] In the photocatalytic reactor, the fluorescent titanium dioxide catalyst is evenly coated on the inner wall surface and forms a stable coating after heating or sintering. The fluorescent titanium dioxide catalyst is a mixture of nano-titanium dioxide and silicon dioxide fiber. Dissolve titanium dioxide in oxalic acid with a concentration of 0.5mol·L -1 for 2h, wash away the excess acid with deionized water, disperse the treated nano-titanium dioxide and silicon dioxide fiber in absolute ethanol, add a silane coupling agent, and then coat it on the inner wall of the photocatalytic oxidation tank by the coating method. After drying by staged heating, a functional fluorescent titanium dioxide (TiO2) material is obtained. Among them, the mass ratio of nano-titanium dioxide to silicon dioxide fiber is 10:1-2, and the mass-volume ratio of nano-titanium dioxide, silane coupling agent, and absolute ethanol is 2g:0.1g, 50mL. The staged heating process is: 50-100°C, 100-150°C.

[0022] During the heating process, mesopores or micropores are formed along the direction of the silicon dioxide fiber by titanium dioxide. At the same time, during the staged heating process, the volatilization of the solvent is also beneficial to the formation of micropores. The photons absorbed by titanium dioxide stay in the pores for a longer time, effectively degrading the pollutants in the water.

[0023] Under ultraviolet light excitation, TiO2 absorbs photons, generating photoexcited electrons (e⁻) and photoexcited holes (h⁺). Photoexcited electrons and holes have reduction and oxidation capabilities respectively, and can degrade organic pollutants in water by generating hydroxyl radicals (·OH) and superoxide radicals (·O2⁻).

[0024] The water treated with ozone enters the activated carbon tank to remove the by-products generated by the oxidation reaction.

[0025] For the photocatalytic reaction mechanism, when fluorescent titanium dioxide is exposed to ultraviolet light irradiation, the following steps occur: Photoexcitation process of the fluorescent titanium dioxide catalyst: When ultraviolet light irradiates the surface of titanium dioxide, the electrons in titanium dioxide jump from the valence band to the conduction band, leaving holes (h⁺): TiO2 + hν → e − + h + The holes (h⁺) react with water molecules (H2O) to generate hydroxyl radicals (•OH): h + + H2O → •OH + H + The electrons (e⁻) react with ozone (O3) to generate superoxide radicals (O2· − ) e − + O3 → O2· − In the presence of ozone, ozone molecules also react with the active particles generated by ultraviolet radiation to promote the generation of •OH and O2· − to form a synergistic effect: O3 + hν → O2 + O O + O3 → 2O2 O + H2O → 2•OH e − + O3 → O2· − The beneficial effects of the present invention are as follows: Using the fluorescent titanium dioxide catalyst provided by the present invention as the inner coating of the device can significantly improve the utilization rate of ultraviolet light.

[0026] The ceramic membrane separator provided by the present invention can fully and evenly distribute ozone gas into the oxidation tank.

[0027] The present invention simultaneously applies ozone oxidation, titanium dioxide catalyst and ultraviolet radiation to water containing various antibiotics. It makes use of the strengthening effect of ultraviolet rays with different wavelengths on ozone oxidation, the strengthening effect of titanium dioxide on ultraviolet rays, and the synergistic effect of direct ozone oxidation, fully utilizing the dissolved ozone in water to generate more hydroxyl radicals, thereby improving the removal and mineralization effects of various antibiotics. This process can not only greatly improve the removal and mineralization efficiency of antibiotics, but also reduce the emission of ozone tail gas, reduce the cost of ozone tail gas treatment, and improve the ozone utilization rate.

[0028] By using the method of the present invention, efficient simultaneous removal and mineralization of various antibiotic organic pollutants (with a concentration of 50 ng / L - 100 mg / L) in water can be achieved, and the removal rate of antibiotics can reach 95% within 15 minutes.

[0029] This treatment method can be carried out at normal temperature and under a relatively wide pH adjustment, with simple operation and short treatment time. It has no selectivity for antibiotic organic pollutants and can be widely applied to the treatment of one or more antibiotics, showing broad prospects in the field of environmental protection and water treatment. Brief Description of the Drawings

[0030] Figure 1 It is a schematic structural diagram of the device of this invention patent; Figure 2 It is a schematic diagram of the ultraviolet lamp distribution of this invention patent; Figure 3 It is a schematic diagram of the ceramic membrane partition of this invention patent; Figure 4 It is a schematic diagram of the gas-liquid separator of this invention patent; Figure 5 It is the effect comparison of the present invention. Detailed Embodiments

[0031] The treatment of pollutants by ozone oxidation technology generally can be divided into direct oxidation reaction and indirect oxidation reaction. The direct oxidation reaction is that ozone molecules directly act on pollutants. According to the principle, it can be divided into: oxidation-reduction reaction, cycloaddition reaction, electrophilic substitution reaction and nucleophilic reaction, etc. Since the oxidation of ozone molecules is selective, the direct oxidation reaction can only act on specific molecular structures, resulting in that ozone oxidation only plays a role in the removal of some organic pollutants, which limits the application of ozone oxidation. Under ultraviolet light irradiation, titanium dioxide can excite electron-hole pairs (e⁻ / h⁺), and these excited electrons and holes can react with ozone molecules to generate more reactive oxygen species (such as hydroxyl radical ·OH), thus enhancing the oxidation ability of ozone. The indirect oxidation reaction is that ozone dissolved in water generates particles with higher reactivity (such as hydroxyl radical (·OH), E = 2.80V) during the decomposition process, and ·OH is not selective and can oxidize almost all organic pollutants. From this point of view, the indirect oxidation reaction has more advantages than the direct oxidation reaction in the treatment of organic pollutants.

[0032] The following examples are used to illustrate the implementation mode of the present invention in detail, so as to fully understand how the present invention uses technical means to solve technical problems and the implementation process of achieving technical effects and implement it accordingly.

[0033] Example 1 An ozone-ultraviolet photocatalytic synergistic water treatment device for source water, comprising: a photocatalytic reactor, an inlet water pretreatment system, an ozone gas generation system, and a gas circulation system; the photocatalytic reactor is connected to the inlet water pretreatment system through an inlet water pipe, and the photocatalytic reactor recovers ozone through an ozone return pipe.

[0034] In the inlet water pretreatment system, the source water is collected and pressurized by a water pump, and the output end is connected to the input end of a filter. The output end of the filter is connected to the input end of a membrane separation device. The output end of the membrane separation device is connected to an activated carbon tank. The output end of the activated carbon tank is connected to the input end of a liquid delivery pump. The output end of the liquid delivery pump is connected to the bottom water inlet of the photocatalytic oxidation tank.

[0035] Among them, in the photocatalytic reactor, catalysis is carried out through a photocatalytic oxidation tank; a gas-liquid separator is arranged at the top inside the photocatalytic oxidation tank, and the water outlet of the gas-liquid separator is connected to a water outlet tank; a liquid level gauge is arranged at the bottom end of the photocatalytic oxidation tank; several partition plates are arranged in the photocatalytic oxidation tank, the partition plates are made of ceramic membrane materials, the partition plates are in a concentric circle structure, and a water inlet and outlet are arranged at the center of the partition plates. The partition plates divide the photocatalytic oxidation tank into four reaction chambers, and the four reaction chambers are arranged from bottom to top in sequence: VUV, UVC, UVB, and UVA ultraviolet lamps. Three ultraviolet lamp tubes perpendicular to the partition plates are evenly arranged in each space; a gas return pipe is arranged at the top of the photocatalytic oxidation tank; a water inlet pipe is arranged in the middle at the bottom end of the photocatalytic oxidation tank, and the bottom end of the photocatalytic oxidation tank is supported and fixed by a steel frame; a pressure gauge is arranged at the top end outside the photocatalytic oxidation tank; an observation hole is arranged on the side wall of the photocatalytic oxidation tank, and the observation hole is arranged above the partition plate.

[0036] The top of the gas-liquid separator is provided with an air outlet, the middle is provided with a water outlet, and the bottom is provided with an air inlet and water inlet.

[0037] The inner wall of the photocatalytic oxidation tank is made of a functional fluorescent titanium dioxide material. The titanium dioxide material is a mixture of nano-titanium dioxide and silicon dioxide fiber. Dissolve the titanium dioxide in 0.5 mol·L-1 oxalic acid for 2 h, wash away the excess acid with deionized water, disperse the treated nano-titanium dioxide and silicon dioxide fiber in absolute ethanol, add a silane coupling agent, and then coat it on the inner wall of the photocatalytic oxidation tank by the coating method. After drying by stagewise heating, a functional fluorescent titanium dioxide material is obtained; among them, the mass ratio of nano-titanium dioxide to silicon dioxide fiber is 10:1-2, and the mass-volume ratio of nano-titanium dioxide, silane coupling agent, and absolute ethanol is 2 g: 0.1 g, 50 mL. The stagewise heating process is: 50-100 °C, 100-150 °C.

[0038] Among them, the output end of the ozone gas generation system is connected to each layer of ceramic membrane partition plate, and ozone micro-nano bubbles are generated through the ceramic membrane partition plate; the input end of the gas circulation system is connected to the air outlet of the gas-liquid separator, and the output end of the gas circulation system is connected to the output end of the ozone gas generation system.

[0039] A method for an ozone ultraviolet photocatalytic synergistic treatment of source water device includes the following steps: S1: After the source water is pressurized by a water pump, suspended impurities are removed through a filter and a membrane separation device, and adsorption and decolorization treatment is carried out in an activated carbon pool; S2: The source water is then transported to the bottom of the photocatalytic reactor through a liquid delivery pump; S3: The ozone generator transports the generated ozone to the photocatalytic reactor; S4: The ozone gas generates ozone micro-nano gas through the ceramic membrane partition arranged in the photocatalytic reactor, undergoes catalytic oxidation with the ultraviolet lamp tubes set in the reaction chamber, and generates free radicals. S5: The ultraviolet rays excite the fluorescent titanium dioxide material coated on the inner wall of the photocatalytic reactor to generate free electrons and holes. S6: A gravity gas-liquid separator is adopted to separate gas and liquid hydrodynamically according to the density difference between gas and liquid.

[0040] The gas-liquid separator above the photocatalytic reaction tank is connected to the input end of the activated carbon tank through the output end of the water outlet connecting pipe, and the output end of the activated carbon tank is connected to the input end of the water outlet tank.

[0041] Effect Example 1 Taking the Yellow River water in the Jinan section as the raw water, 2 L of the water sample to be treated with various antibiotic concentrations of 1 mg / L such as tetracycline, oxytetracycline, metronidazole, erythromycin, norfloxacin, and roxithromycin is prepared. The ultraviolet lamp is turned on, and 1 mg / L ozone (through an ozone generator) is continuously introduced to treat the water sample. At 15 minutes, the removal effects of three kinds of water body antibiotics after the co-addition of ozone alone, UV + ozone, UV + TiO2, and UV + TiO 2+ Ozone are compared. As shown in the figure, after the co-addition of UV + TiO 2+ Ozone, the effect is significantly improved compared with UV + ozone, UV + TiO2, and ozone alone. The removal rate after adding UV + TiO2 + ozone is increased by 15% - 25% compared with UV + ozone, the removal rate is increased by 20% - 30% compared with UV + TiO2, and the removal rate is increased by 40% compared with ozone alone.

Claims

1. An ozone ultraviolet photocatalytic synergistic water source treatment device, characterized in that it includes: Photocatalytic reactor, influent pretreatment system, ozone gas generation system, gas circulation system; the photocatalytic reactor is connected to the influent pretreatment system through an influent pipe, and the photocatalytic reactor recovers ozone through an ozone reflux pipe.

2. The ozone ultraviolet photocatalytic synergistic water source treatment device according to claim 1, characterized in that, In the photocatalytic reactor, catalysis is carried out through a photocatalytic oxidation tank; a gas-liquid separator is arranged at the top inside the photocatalytic oxidation tank, and the water outlet of the gas-liquid separator is connected to the water outlet tank; a liquid level gauge is arranged at the bottom of the photocatalytic oxidation tank; several partition plates are arranged in the photocatalytic oxidation tank, dividing the photocatalytic oxidation tank into four reaction chambers, and three ultraviolet lamps perpendicular to the partition plates are evenly arranged in each space; a gas reflux pipe is arranged at the top of the photocatalytic oxidation tank; a water inlet pipe is arranged in the middle at the bottom of the photocatalytic oxidation tank, and the bottom of the photocatalytic oxidation tank is supported and fixed by a steel frame; a pressure gauge is arranged at the top outside the photocatalytic oxidation tank; an observation hole is arranged on the side wall of the photocatalytic oxidation tank, and the observation hole is arranged between the partition plates.

3. The ozone ultraviolet photocatalytic synergistic water source treatment device according to claim 2, wherein, The partition plate is made of ceramic membrane material, and the partition plate is of a concentric circle structure, with a water inlet and outlet arranged at the center of the partition plate.

4. The device for synergistically treating source water by ozone and ultraviolet photocatalysis according to claim 1, wherein Four reaction chambers are arranged in sequence from bottom to top: VUV, UVC, UVB, UVA ultraviolet lamps.

5. The ozone ultraviolet photocatalytic synergistic water source treatment device according to claim 2, wherein The inner wall of the photocatalytic oxidation tank is made of functional fluorescent titanium dioxide material. The titanium dioxide material is a mixture of nano-titanium dioxide and silicon dioxide fiber. Dissolve titanium dioxide in oxalic acid with a concentration of 0.5mol·L -1 for 2 hours, wash away the excess acid with deionized water, disperse the treated nano-titanium dioxide and silicon dioxide fiber in absolute ethanol, add a silane coupling agent, and then coat it on the inner wall of the photocatalytic oxidation tank by the coating method. After drying by stepwise heating, the functional fluorescent titanium dioxide material is obtained. Among them, the mass ratio of nano-titanium dioxide to silicon dioxide fiber is 10:1-2, and the mass-volume ratio of nano-titanium dioxide, silane coupling agent, and absolute ethanol is 2g:0.1g:50mL. The stepwise heating process is: 50-100°C, 100-150°C.

6. The device for synergistically treating source water by ozone and ultraviolet photocatalysis according to claim 1, wherein, An air outlet is arranged at the top of the gas-liquid separator, a water outlet is arranged in the middle, and an air inlet and water inlet are arranged at the bottom.

7. The ozone ultraviolet photocatalytic synergistic water source treatment device according to claim 1, characterized in that, In the influent pretreatment system, the source water is collected and pressurized by a water pump, and the output end is connected to the input end of a filter. The output end of the filter is connected to the input end of a membrane separation device. The output end of the membrane separation device is connected to an activated carbon tank. The output end of the activated carbon tank is connected to the input end of a liquid delivery pump. The output end of the liquid delivery pump is connected to the water inlet at the bottom of the photocatalytic oxidation tank.

8. The device for synergistically treating source water by ozone and ultraviolet photocatalysis according to claim 1, characterized in that, The output end of the ozone gas generation system is connected to each layer of ceramic membrane partition plate, and ozone micro-nano bubbles are generated through the ceramic membrane partition plate; the input end of the gas circulation system is connected to the air outlet of the gas-liquid separator, and the output end of the gas circulation system is connected to the output end of the ozone gas generation system.

9. A method for using the device for synergistically treating source water by ozone ultraviolet photocatalysis according to claim 1, characterized in that, Including the following steps: S1: After the source water is pressurized by a water pump, suspended impurities are removed through a filter and a membrane separation device, and adsorption and decolorization treatment are carried out in an activated carbon pool. S2: The source water is then transported to the bottom of the photocatalytic reactor through a liquid delivery pump. S3: The ozone generated by the ozone generator is transported to the photocatalytic reactor. S4: The ozone gas generates ozone micro-nano gas through the ceramic membrane partition plate arranged in the photocatalytic reactor, and catalytic oxidation occurs with the ultraviolet lamps arranged in the reaction chamber to generate free radicals. S5: Ultraviolet rays excite the fluorescent titanium dioxide material coated on the inner wall of the photocatalytic reactor to generate free electrons and holes. S6: A gravity gas-liquid separator is adopted, and the gas and liquid are separated under hydrodynamics according to the density difference between the gas and the liquid.

10. The method according to claim 9, wherein The gas-liquid separator above the photocatalytic reaction tank is connected to the input end of the activated carbon tank through the output end of the connecting water outlet pipe, and the output end of the activated carbon tank is connected to the input end of the water outlet tank.

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