Ozone micro-nano bubble and vacuum ultraviolet integrated device for removing organic pollutants in water

Abstract

The utility model discloses an ozone micro-nano bubble and vacuum ultraviolet integrated device for removing organic pollutants in water, and belongs to the technical field of water treatment. The device comprises a high-purity oxygen bottle, an oxygen conveying pipe, an ozone generator, an ozone conveying pipe, a micro-nano bubble generator, a micro-nano bubble water conveying pipe, a micro-nano bubble water return pipe, a tail gas exhaust pipe, an ultraviolet device and a liquid circulating system. The liquid circulation system comprises a liquid storage tank, a sample outlet pipe and a sample return pipe; the ultraviolet device comprises a vacuum ultraviolet lamp tube, a sleeve wrapping the lamp tube, a light reaction column body, a top sealing cover body and a bottom sealing cover body. The design of the vacuum ultraviolet thin-wall flow can ensure that all reaction liquid can receive higher vacuum ultraviolet radiation illumination, the gas-liquid contact area is increased by the micro-bubbling of ozone, the mass transfer efficiency can be effectively improved, in addition, the micro-bubbling ozone can generate. OH at the moment of micro-bubble shrinkage and rupture, the oxidation capacity of a system can be greatly improved, and the reaction time is shortened. And finally, high-efficiency degradation of organic pollutants is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, and particularly relates to an ozone micro-nano bubble and vacuum ultraviolet integrated device for removing organic pollutants in water. Background Art

[0002] Organic pollutants in water have attracted much attention because they will have an adverse impact on the aquatic environment and water use safety. Although ultraviolet irradiation technology can be used for water disinfection, it is difficult to control water body organic pollution. Vacuum ultraviolet (VUV) refers to ultraviolet rays with a wavelength of 100-200nm. Compared with traditional ultraviolet, it has higher energy and can directly crack water to generate active species to quickly remove organic pollutants in water. It is a new emerging green oxidation technology. At present, commercially available vacuum ultraviolet lamps can simultaneously emit photons of 254nm and 185nm, and have the advantages of low price, long life, and high efficiency, and are widely used in water treatment research.

[0003] In order to better play the advantages of VUV advanced oxidation, at present, more and more research generates more active species by adding oxidants to the VUV oxidation system and using the synergistic effect between VUV and the oxidant to achieve the rapid degradation of organic pollutants. Ozone (O 3 ) is one of the commonly used oxidants in the field of water pollution control and has strong oxidizing properties. Using VUV combined with O 3 oxidation, VUV can not only photolyze water in-situ to generate active species, but also the 185nm and 254nm photons emitted by VUV can decompose O 3 and convert it into hydroxyl radicals (·OH), which greatly increases the yield of active species and speeds up the removal of organic pollutants in water.

[0004] However, the O 3 / VUV process still has some deficiencies. First, the proportion of 185nm photons in the VUV light source is relatively low, and water molecules have strong absorption characteristics for VUV, which makes the irradiation distance of VUV in water limited, and it is difficult for active species to be generated and play a role, restricting the application of VUV advanced oxidation technology; second, the solubility of O 3 in water is relatively low, which leads to a very low mass transfer efficiency of O 3 from the gas phase to the liquid phase, greatly reducing the oxidation efficiency of the O 3 / VUV process for pollutants. Based on this, the utility model proposes an ozone micro-nano bubble / vacuum ultraviolet integrated device. Summary of the Utility Model

[0005] To solve the above technical problems, the present utility model proposes an ozone micro-nano bubble / vacuum ultraviolet integrated device. On the one hand, the design of the vacuum ultraviolet thin wall flow can ensure that all reaction liquids can receive high-intensity vacuum ultraviolet radiation light. On the other hand, the micro-bubbling of ozone increases the gas-liquid contact area, which can effectively improve the mass transfer efficiency. In addition, the micro-bubbled ozone will generate ·OH at the moment of micro-bubble shrinkage and rupture, which can greatly improve the oxidation ability of the system and finally achieve the efficient degradation of organic pollutants.

[0006] The present utility model not only needs to ensure that all reaction solutions can receive high-intensity vacuum ultraviolet radiation light, but also needs to improve the mass transfer efficiency of ozone from the gas phase to the liquid phase and the utilization rate of ozone, and finally achieve the efficient removal of organic pollutants in water.

[0007] An ozone micro-nano bubble and vacuum ultraviolet integrated device for removing organic pollutants in water, comprising a high-purity oxygen cylinder 1, an oxygen delivery pipe 2, an ozone generator 3, an ozone delivery pipe 4, a micro-nano bubble generator 5, a micro-nano bubble water delivery pipe 6, a micro-nano bubble water return pipe 7, an exhaust gas discharge pipe 8, an ultraviolet device and a liquid circulation system;

[0008] The high-purity oxygen cylinder 1 is connected to the ozone generator 3 through the oxygen delivery pipe 2; the ozone generator 3 is connected to the air inlet of the micro-nano bubble generator 5 through the ozone delivery pipe 4;

[0009] The liquid circulation system includes a liquid storage tank 21, a sample output pipe 17 and a sample return pipe 18;

[0010] The ultraviolet device includes a vacuum ultraviolet lamp tube 9, a sleeve 10 wrapping the lamp tube, a photoreaction column 11, a top sealing cover 23 and a bottom sealing cover 24; the vacuum ultraviolet lamp tube 9 is arranged in the sleeve 10 wrapping the lamp tube, and the vacuum ultraviolet lamp tube 9 is located at the central axis position of the photoreaction column 11; the top and bottom of the photoreaction column 11 are respectively provided with a top sealing cover 23 and a bottom sealing cover 24; the top and bottom of the vacuum ultraviolet lamp tube 9 and the sleeve 10 wrapping the lamp tube are respectively fixed in the top sealing cover 23 and the bottom sealing cover 24;

[0011] One end of the micro-nano bubble water delivery pipe 6 is connected to the water outlet of the micro-nano bubble generator 5, and the other end passes through the bottom sealing cover 24 and extends into the photoreaction column 11; one end of the sample output pipe 17 is connected to the liquid storage tank 21, and the other end passes through the bottom sealing cover 24 and extends into the photoreaction column 11;

[0012] One end of each of the micro-nano bubble return pipe 7, the tail gas discharge pipe 8, and the sample return pipe 18 is arranged in the photoreaction column body 11, and the other end penetrates through the top sealing cover body 23. The other end of the micro-nano bubble return pipe 7 is communicated with the water inlet of the micro-nano bubble generator 5, and the other end of the sample return pipe 18 is communicated with the liquid storage tank 21; a reaction solution is contained in the liquid storage tank 21, and the reaction solution can be irradiated by vacuum ultraviolet light in the photoreaction column body 11.

[0013] A circulating cooling sleeve 12 is further arranged outside the photoreaction column body 11, and a sealed cooling and temperature control chamber is formed between the photoreaction column body 11 and the circulating cooling sleeve 12; a cooling water inlet and a cooling water outlet are respectively arranged at the lower part and the upper part of the circulating cooling sleeve 12, and the low-temperature constant temperature water bath 15 is respectively connected with the cooling water inlet and the cooling water outlet of the circulating cooling sleeve 12 through a cooling water inlet pipe 13 and a cooling water outlet pipe 14 to keep the temperature of the vacuum ultraviolet lamp tube 9 constant, stabilize the vacuum ultraviolet radiation light intensity, and control the temperature of the reaction solution.

[0014] A circulating water pump 16 is arranged on the pipeline of the sample outlet pipe 17.

[0015] The principle of the present utility model:

[0016] 1. A high-purity oxygen cylinder 1 is used as a gas source. The volume fraction of oxygen stored in the cylinder is 100%. The oxygen enters the ozone generator 3 through the oxygen pipeline 2. After high-voltage discharge in the ozone generator 3, ozone gas is generated. The ozone gas enters the micro-nano bubble generator 5 through the ozone pipeline 4 and ozone micro-nano bubbles are generated by the micro-nano bubble generator 5. Both the vacuum ultraviolet lamp tube 9 and the sleeve 10 wrapping the lamp tube are made of high-purity quartz, which can enable the ultraviolet device to simultaneously emit ultraviolet light with wavelengths of 185 nm and 254 nm. The vacuum ultraviolet lamp tube 9 and the sleeve 10 wrapping the lamp tube are located at the central axis position of the photoreaction column 11. The outer diameter of the sleeve 10 wrapping the lamp tube is 20 mm - 25 mm. The outer diameter of the photoreaction column 11 is 45 mm - 50 mm and the height is 260 mm. A layer of aluminum foil paper is also covered on the outer wall of the photoreaction column 11 to prevent the loss of ultraviolet light by irradiating in all directions, improve the utilization rate of vacuum ultraviolet light and avoid direct irradiation of experimental personnel by ultraviolet light and causing harm. The reaction solution in the liquid storage tank 21 contains one or more organic pollutants such as phenols, amines, olefins, and sulfonamides. One end of the micro-nano bubble pipeline 6 is connected to the water outlet of the micro-nano bubble generator 5, and the other end passes through the bottom sealing cover 24 and extends into the photoreaction column 11. One end of the sampling pipe 17 is connected to the liquid storage tank 21, and the other end passes through the bottom sealing cover 24 and extends into the photoreaction column 11. One ends of the micro-nano bubble return pipeline 7, the tail gas discharge pipe 8, and the sample return pipe 18 are arranged in the photoreaction column 11, and the other ends pass through the top sealing cover 23. The other end of the micro-nano bubble return pipeline 7 is connected to the water inlet of the micro-nano bubble generator 5, and the other end of the sample return pipe 18 is connected to the liquid storage tank 21. The reaction solution circulates continuously between the ultraviolet device and the liquid storage tank 21 to ensure that the reaction solution can be irradiated by vacuum ultraviolet light and oxidized by ozone micro-nano bubbles in the ultraviolet device, and can also be taken out by the sampler 22 in the liquid storage tank 21 and used for analysis and detection.

[0017] 2. A micro-nano aeration head is provided on the micro-nano bubble pipeline 6. The aeration head of the micro-nano bubble pipeline 6 and the filter head of the micro-nano bubble return pipeline 7 are both placed below the water surface of the water body. The micro-nano bubble generator 5 is also provided with a micro-nano bubble pipeline 6 and a micro-nano bubble return pipeline 7 at the same time. The ozone micro-nano bubbles generated by the micro-nano bubble generator 5 first enter the reaction solution in the ultraviolet device through the micro-nano bubble pipeline 6. At this time, the micro-nano bubbles undergo cavitation degradation. Subsequently, the ozone micro-nano bubble dissolved water in the ultraviolet device returns to the micro-nano bubble generator 5 through the micro-nano bubble return pipeline 7, that is, the reaction solution circulates reciprocally between the ultraviolet device and the micro-nano bubble generator 5 until the organic pollutants are degraded to meet the standards. In addition, the tail gas discharge pipe 8 is connected to a conical flask containing potassium iodide solution to absorb and decompose the ozone tail gas.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0019] 1. The utility model improves the traditional vacuum ultraviolet lamp and designs a vacuum ultraviolet thin-wall flow device. That is, the gap between the photoreaction cylinder 11 and the sleeve 10 wrapping the lamp tube is used as the reaction site of vacuum ultraviolet, and the reaction solution is continuously circulated by a circulating water pump. This not only avoids the problem that the vacuum ultraviolet rays may be completely absorbed due to the too thick reaction solution, but also ensures that the reaction solution can receive high-intensity vacuum ultraviolet radiation.

[0020] 2. The utility model injects ozone into the solution in the form of micro-nano bubbles, effectively avoiding the problem of low gas-liquid mass transfer efficiency caused by the low solubility of ozone, improving the utilization rate of ozone. In addition, the micro-bubbled ozone will also generate ·OH when the micro-bubbles shrink and burst, greatly improving the oxidation ability of the system and the removal efficiency of pollutants.

[0021] 3. The utility model is provided with a circulating cooling sleeve 12 capable of containing liquid on the outside of the photoreaction cylinder 11, and the circulating cooling water inside can be continuously circulated through a low-temperature constant temperature water bath. This can effectively ensure the constant temperature of the vacuum ultraviolet lamp tube, stabilize the radiation intensity of the vacuum ultraviolet lamp, and at the same time control and maintain the solution temperature.

[0022] 4. The device of the utility model is easy to build, simple in structure and convenient to operate. The device of the utility model can be used to quickly and efficiently remove organic pollutants in water. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of an ozone micro-nano bubble and vacuum ultraviolet integrated device for removing organic pollutants in water described in Embodiment 1. Detailed Embodiments

[0024] Detailed Embodiment 1: An ozone micro-nano bubble and vacuum ultraviolet integrated device for removing organic pollutants in water in this embodiment includes a high-purity oxygen cylinder 1, an oxygen pipeline 2, an ozone generator 3, an ozone pipeline 4, a micro-nano bubble generator 5, a micro-nano bubble water pipeline 6, a micro-nano bubble return water pipeline 7, an exhaust gas pipeline 8, an ultraviolet device and a liquid circulation system;

[0025] The high-purity oxygen cylinder 1 is connected to the ozone generator 3 through the oxygen pipeline 2; the ozone generator 3 is connected to the air inlet of the micro-nano bubble generator 5 through the ozone pipeline 4;

[0026] The liquid circulation system includes a liquid storage tank 21, a sample outlet pipe 17 and a sample return pipe 18;

[0027] The ultraviolet device described above includes a vacuum ultraviolet lamp tube 9, a sleeve 10 wrapping the lamp tube, a photoreaction column 11, a top sealing cover 23, and a bottom sealing cover 24; the vacuum ultraviolet lamp tube 9 is arranged in the sleeve 10 wrapping the lamp tube, and the vacuum ultraviolet lamp tube 9 is located at the central axis position of the photoreaction column 11; the top and bottom of the photoreaction column 11 are respectively provided with a top sealing cover 23 and a bottom sealing cover 24; the top and bottom of the vacuum ultraviolet lamp tube 9 and the sleeve 10 wrapping the lamp tube are respectively fixed in the top sealing cover 23 and the bottom sealing cover 24;

[0028] One end of the micro-nano bubble water delivery pipe 6 described above is communicated with the water outlet of the micro-nano bubble generator 5, and the other end passes through the bottom sealing cover 24 and extends into the photoreaction column 11; one end of the sample delivery pipe 17 is communicated with the liquid storage tank 21, and the other end passes through the bottom sealing cover 24 and extends into the photoreaction column 11;

[0029] One ends of the micro-nano bubble return pipe 7, the tail gas discharge pipe 8, and the sample return pipe 18 are all arranged in the photoreaction column 11, and the other ends all pass through the top sealing cover 23. The other end of the micro-nano bubble return pipe 7 is communicated with the water inlet of the micro-nano bubble generator 5, and the other end of the sample return pipe 18 is communicated with the liquid storage tank 21; a reaction solution is contained in the liquid storage tank 21, and the reaction solution can receive the irradiation of vacuum ultraviolet light in the photoreaction column 11;

[0030] A circulating cooling sleeve 12 is further arranged outside the photoreaction column 11, and a sealed cooling and temperature control chamber is formed between the photoreaction column 11 and the circulating cooling sleeve 12; a cooling water inlet and a cooling water outlet are respectively arranged at the lower and upper parts of the circulating cooling sleeve 12. The low-temperature constant temperature water bath 15 is respectively connected with the cooling water inlet and the cooling water outlet of the circulating cooling sleeve 12 through a cooling water inlet pipe 13 and a cooling water outlet pipe 14 to keep the temperature of the vacuum ultraviolet lamp tube 9 constant, stabilize the intensity of the vacuum ultraviolet radiation light, and control the temperature of the reaction solution;

[0031] A circulating water pump 16 is arranged on the pipeline of the sample delivery pipe 17.

[0032] Specific Embodiment 2: The difference between this embodiment and Specific Embodiment 1 is that the volume fraction of oxygen stored in the high-purity oxygen cylinder 1 is 100%. Other steps are the same as those in Specific Embodiment 1.

[0033] Specific Embodiment 3: The difference between this embodiment and one of Specific Embodiments 1 or 2 is that the material of the vacuum ultraviolet lamp tube 9 is high-purity quartz, and the mass fraction of SiO 2 is more than 99.9%. Other steps are the same as those in Specific Embodiment 1 or 2.

[0034] Embodiment 4: The difference between this embodiment and any one of Embodiments 1 to 3 is that the material of the sleeve 10 wrapping the lamp tube is high-purity quartz, and the mass fraction of SiO 2 is more than 99.9%. Other steps are the same as those in Embodiments 1 to 3.

[0035] Embodiment 5: The difference between this embodiment and any one of Embodiments 1 to 4 is that the vacuum ultraviolet lamp tube 9 simultaneously emits ultraviolet light with wavelengths of 185 nm and 254 nm. Other steps are the same as those in Embodiments 1 to 4.

[0036] Embodiment 6: The difference between this embodiment and any one of Embodiments 1 to 5 is that the outer diameter of the sleeve 10 wrapping the lamp tube is 20 mm to 25 mm; the outer diameter of the photoreaction column 11 is 45 mm to 50 mm, and the height is 260 mm; a layer of aluminum foil paper is further covered on the outer wall of the photoreaction column 11. Other steps are the same as those in Embodiments 1 to 5.

[0037] Embodiment 7: The difference between this embodiment and any one of Embodiments 1 to 6 is that a sampler 22 is further provided on the upper part of the liquid storage tank 21; the liquid storage tank 21 is placed on a magnetic stirrer 19, and a magnetic stirring rotor 20 is contained in the liquid storage tank 21. Other steps are the same as those in Embodiments 1 to 6.

[0038] Embodiment 8: The difference between this embodiment and any one of Embodiments 1 to 7 is that a micro-nano aeration head is provided on the micro-nano bubble water delivery pipe 6, and the aeration head of the micro-nano bubble water delivery pipe 6 and the filter head of the micro-nano bubble return pipe 7 are both placed below the water surface. Other steps are the same as those in Embodiments 1 to 7.

[0039] The following examples are used to verify the beneficial effects of the present invention:

[0040] Example 1: An ozone micro-nano bubble and vacuum ultraviolet integrated device for removing organic pollutants in water, including a high-purity oxygen cylinder 1, an oxygen delivery pipe 2, an ozone generator 3, an ozone delivery pipe 4, a micro-nano bubble generator 5, a micro-nano bubble water delivery pipe 6, a micro-nano bubble return pipe 7, an exhaust gas discharge pipe 8, an ultraviolet device and a liquid circulation system;

[0041] The high-purity oxygen cylinder 1 is connected to the ozone generator 3 through the oxygen delivery pipe 2; the ozone generator 3 is connected to the air inlet of the micro-nano bubble generator 5 through the ozone delivery pipe 4;

[0042] The liquid circulation system includes a liquid storage tank 21, a sampling pipe 17 and a sample return pipe 18;

[0043] The ultraviolet device described above includes a vacuum ultraviolet lamp tube 9, a sleeve 10 that wraps the lamp tube, a photoreaction column 11, a top sealing cover 23, and a bottom sealing cover 24; the vacuum ultraviolet lamp tube 9 is arranged in the sleeve 10 that wraps the lamp tube, and the vacuum ultraviolet lamp tube 9 is located at the central axis position of the photoreaction column 11; a top sealing cover 23 and a bottom sealing cover 24 are respectively arranged at the top and bottom of the photoreaction column 11; the top and bottom of the vacuum ultraviolet lamp tube 9 and the sleeve 10 that wraps the lamp tube are respectively fixed in the top sealing cover 23 and the bottom sealing cover 24;

[0044] One end of the micro-nano bubble water delivery pipe 6 described above is connected to the water outlet of the micro-nano bubble generator 5, and the other end passes through the bottom sealing cover 24 and extends into the photoreaction column 11; one end of the sample outlet pipe 17 is connected to the liquid storage tank 21, and the other end passes through the bottom sealing cover 24 and extends into the photoreaction column 11;

[0045] One ends of the micro-nano bubble return pipe 7, the tail gas discharge pipe 8, and the sample return pipe 18 are all arranged in the photoreaction column 11, and the other ends all pass through the top sealing cover 23. The other end of the micro-nano bubble return pipe 7 is connected to the water inlet of the micro-nano bubble generator 5, and the other end of the sample return pipe 18 is connected to the liquid storage tank 21; a reaction solution is contained in the liquid storage tank 21, and the reaction solution can receive the irradiation of vacuum ultraviolet light in the photoreaction column 11;

[0046] A circulating cooling sleeve 12 is also arranged outside the photoreaction column 11, and a sealed cooling and temperature control chamber is formed between the photoreaction column 11 and the circulating cooling sleeve 12; a cooling water inlet and a cooling water outlet are respectively arranged at the lower part and the upper part of the circulating cooling sleeve 12. The low-temperature constant temperature water bath 15 is respectively connected to the cooling water inlet and the cooling water outlet of the circulating cooling sleeve 12 through a cooling water inlet pipe 13 and a cooling water outlet pipe 14 to keep the temperature of the vacuum ultraviolet lamp tube 9 constant, stabilize the vacuum ultraviolet radiation intensity, and control the temperature of the reaction solution;

[0047] A circulating water pump 16 is arranged on the pipeline of the sample outlet pipe 17;

[0048] The volume fraction of oxygen stored in the high-purity oxygen cylinder 1 is 100%;

[0049] The material of the vacuum ultraviolet lamp tube 9 is high-purity quartz, and the mass fraction of SiO 2 is above 99.9%;

[0050] The material of the sleeve 10 that wraps the lamp tube is high-purity quartz, and the mass fraction of SiO 2 is above 99.9%;

[0051] The described vacuum ultraviolet lamp tube 9 simultaneously emits ultraviolet light with wavelengths of 185 nm and 254 nm;

[0052] The outer diameter of the sleeve 10 wrapping the lamp tube is 25 mm; the outer diameter of the photoreaction column 11 is 50 mm, and the height is 260 mm; a layer of aluminum foil paper is also covered on the outer wall of the photoreaction column 11;

[0053] A sampler 22 is also provided on the upper part of the liquid storage tank 21; the liquid storage tank 21 is placed on the magnetic stirrer 19, and a magnetic stirring rotor 20 is contained in the liquid storage tank 21;

[0054] The micro-nano bubble water delivery pipe 6 is provided with a micro-nano aeration head, and the aeration head of the micro-nano bubble water delivery pipe 6 and the filter head of the micro-nano bubble return pipe 7 are both placed below the water surface of the water body;

[0055] The usage method of the ozone micro-nano bubble and vacuum ultraviolet integrated device for removing organic pollutants in water is specifically completed according to the following steps:

[0056] Step 1: Preparation stage:

[0057] 1. Turn on the low-temperature constant temperature water bath 15, inject cooling water into the cooling temperature control chamber through the cooling water inlet, and keep the water temperature in the cooling temperature control chamber at 25 °C all the time;

[0058] 2. Turn on the vacuum ultraviolet lamp tube 9 and preheat the photoreaction column 11 for 15 minutes;

[0059] 3. Pour a certain volume of ultrapure water into the liquid storage tank 21, and at the same time turn on the circulating water pump 16. Under the action of the circulating water pump 16, the ultrapure water is pumped into the photoreaction column 11;

[0060] 4. Operate the ozone generator 3 and the micro-nano bubble generator 5 for 20 minutes to obtain a stable ozone micro-nano bubble flow;

[0061] Step 2: Reaction stage:

[0062] 1. Inject a certain concentration of organic pollutant mother liquor into the liquid storage tank 21, and at the same time turn on the magnetic stirrer 19. Under the action of the magnetic stirrer 19 and the magnetic stirring rotor 20, the reaction solution in the liquid storage tank 21 is evenly mixed and continuously circulates in the liquid storage tank 21 and the ultraviolet device. At this time, the initial concentration of the organic pollutants in the liquid circulation system is the preset reaction concentration;

[0063] 2. Sample from the liquid storage tank 21 at regular intervals through the sampler 22 and analyze the change in the concentration of organic pollutants therein;

[0064] Step 3: End of reaction:

[0065] After the reaction is completed, turn off the ozone generator 3, the micro-nano bubble generator 5 and the vacuum ultraviolet lamp 9 in sequence. At the same time, empty the solution in the liquid storage tank 21 and inject deionized water to clean the pipeline. After the cleaning is completed, empty the water in the pipeline and stop the circulation water pump 16.

[0066] In this embodiment, the structure of the integrated device of ozone micro-nano bubbles and vacuum ultraviolet for removing organic pollutants in water is simple and easy to operate. By using the device of this embodiment, the rapid and efficient removal of organic pollutants in water can be realized until the organic pollutants are degraded up to the standard.

Claims

1. An integrated device of ozone micro-nano bubbles and vacuum ultraviolet for removing organic pollutants in water, characterized in that The device comprises a high-purity oxygen cylinder (1), an oxygen gas transmission pipe (2), an ozone generator (3), an ozone gas transmission pipe (4), a micro-nano bubble generator (5), a micro-nano bubble water transmission pipe (6), a micro-nano bubble water return pipe (7), an exhaust gas discharge pipe (8), an ultraviolet device and a liquid circulation system; The high-purity oxygen cylinder (1) is connected to the ozone generator (3) through the oxygen gas transmission pipe (2); the ozone generator (3) is connected to the air inlet of the micro-nano bubble generator (5) through the ozone gas transmission pipe (4); The liquid circulation system comprises a liquid storage tank (21), a sample outlet pipe (17) and a sample return pipe (18); The ultraviolet device comprises a vacuum ultraviolet lamp (9), a sleeve (10) wrapping the lamp, a photoreaction column (11), a top sealing cover (23) and a bottom sealing cover (24); the vacuum ultraviolet lamp (9) is arranged in the sleeve (10) wrapping the lamp, and the vacuum ultraviolet lamp (9) is located at the central axis of the photoreaction column (11); the top and bottom of the photoreaction column (11) are respectively provided with a top sealing cover (23) and a bottom sealing cover (24); the vacuum ultraviolet lamp (9) and the top and bottom of the sleeve (10) wrapping the lamp are respectively fixed in the top sealing cover (23) and the bottom sealing cover (24); One end of the micro-nano bubble water delivery pipe (6) is connected to the water outlet of the micro-nano bubble generator (5), and the other end passes through the bottom sealing cover (24) and extends into the light reaction column (11); one end of the sample outlet pipe (17) is connected to the liquid storage tank (21), and the other end passes through the bottom sealing cover (24) and extends into the light reaction column (11); One end of the micro-nano bubble water return pipe (7), the tail gas discharge pipe (8) and the sample return pipe (18) are all arranged in the photoreaction column (11), and the other end of each of them passes through the top sealing cover (23); the other end of the micro-nano bubble water return pipe (7) is connected to the water inlet of the micro-nano bubble generator (5), and the other end of the sample return pipe (18) is connected to the liquid storage tank (21); the liquid storage tank (21) is filled with a reaction solution, and the reaction solution can be irradiated by vacuum ultraviolet light in the photoreaction column (11); A circulating cooling sleeve (12) is also provided outside the photoreaction column (11), and a sealed cooling temperature control chamber is formed between the photoreaction column (11) and the circulating cooling sleeve (12); a cooling water inlet and a cooling water outlet are also provided at the lower part and the upper part of the circulating cooling sleeve (12), respectively; a low-temperature constant temperature water bath (15) is connected to the cooling water inlet and the cooling water outlet of the circulating cooling sleeve (12) through a cooling water inlet pipe (13) and a cooling water outlet pipe (14), respectively, so as to keep the temperature of the vacuum ultraviolet lamp (9) constant, stabilize the vacuum ultraviolet radiation intensity and control the temperature of the reaction solution; A circulating water pump (16) is provided on the pipeline of the sample outlet pipe (17).

2. The ozone micro-nano bubble and vacuum ultraviolet integrated device for removing organic pollutants in water according to claim 1 is characterized in that The volume fraction of oxygen stored in the high-purity oxygen cylinder (1) is 100%.

3. The ozone micro-nano bubble and vacuum ultraviolet integrated device for removing organic pollutants in water according to claim 1 is characterized in that The vacuum ultraviolet lamp tube (9) is made of high-purity quartz, and the mass fraction of SiO2 is above 99.9%.

4. The ozone micro-nano bubble and vacuum ultraviolet integrated device for removing organic pollutants in water according to claim 1, characterized in that The sleeve (10) wrapping the lamp tube is made of high-purity quartz, and the mass fraction of SiO2 is above 99.9%.

5. The ozone micro-nano bubble and vacuum ultraviolet integrated device for removing organic pollutants in water according to claim 1, characterized in that The vacuum ultraviolet lamp tube (9) simultaneously releases ultraviolet light with wavelengths of 185 nm and 254 nm.

6. The ozone micro-nano bubble and vacuum ultraviolet integrated device for removing organic pollutants in water according to claim 1, characterized in that The outer diameter of the sleeve (10) wrapping the lamp tube is 20 mm to 25 mm; the outer diameter of the light reaction column (11) is 45 mm to 50 mm, and the height is 260 mm; the outer wall of the light reaction column (11) is also covered with a layer of aluminum foil.

7. The ozone micro-nano bubble and vacuum ultraviolet integrated device for removing organic pollutants in water according to claim 1, characterized in that The upper part of the liquid storage tank (21) is also provided with a sampler (22); the liquid storage tank (21) is placed on the magnetic stirrer (19), and the liquid storage tank (21) contains a magnetic stirring rotor (20).

8. The ozone micro-nano bubble and vacuum ultraviolet integrated device for removing organic pollutants in water according to claim 1, characterized in that The micro-nano bubble water delivery pipe (6) is provided with a micro-nano aeration head, and the aeration head of the micro-nano bubble water delivery pipe (6) and the filter head of the micro-nano bubble water return pipe (7) are both placed below the water body liquid surface.

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