Pipeline type ozone advanced oxidation reaction device and application

Abstract

The invention provides a pipeline type ozone advanced oxidation reaction device and application, and belongs to the field of sewage treatment. The device comprises a pipeline reactor, an ozone generator and a micro-nano bubble generator, the pipeline reactor is of a tubular structure and can be used as a part of a transportation pipeline; a nozzle is arranged in the inner cavity of the pipeline reactor; the ozone generator and the micro-nano bubble generator are arranged outside the pipeline reactor, an outlet of the ozone generator is communicated with an inlet of the micro-nano bubble generator, and an outlet of the micro-nano bubble generator is communicated with the nozzle. According to the invention, the contact area of ozone and wastewater is increased, the mass transfer efficiency of a gas-liquid interface is enhanced, the reaction rate of ozone oxidation is further improved, and the reaction time is prolonged; meanwhile, advanced oxidation of ozone can be realized in the transportation process of the organic wastewater, so that independent arrangement of an ozone advanced oxidation unit is avoided, and the land and the cost are further saved.

Description

Technical Field

[0001] The invention belongs to the field of sewage treatment, and specifically relates to a pipeline type ozone advanced oxidation reaction device and application thereof. Background Art

[0002] With the rapid development of industrial economy, the discharge of industrial wastewater has increased year by year. Industrial wastewater contains a large amount of artificial synthetic organic matter, such as aromatic hydrocarbons, polycyclic aromatic hydrocarbons, chlorinated aromatic hydrocarbons, organic acid esters, etc. These organic pollutants are often difficult to biodegrade. Once entering the environmental system, they will be bioaccumulated along the food chain and eventually enter the human body, seriously threatening human health and causing irreversible effects on the human nervous system, endocrine system, reproductive function, etc. Therefore, the removal of organic pollutants in working wastewater is an important link faced by sewage treatment.

[0003] Ozone advanced oxidation technology is a green and efficient water treatment technology. Ozone is a strong oxidizing substance that can effectively degrade pollutants in wastewater with stable structure and low biodegradability without causing secondary pollution. It has broad application prospects in deep wastewater treatment.

[0004] However, due to the relatively unstable structure of ozone molecules and short half-life, it is easy to decompose into oxygen in water, reducing the concentration of ozone, resulting in low ozone utilization and low reaction efficiency. Introducing ozone into wastewater in the form of micro-nano bubbles can effectively increase the oxidation reaction rate of ozone and prolong the reaction time.

[0005] At present, when sewage treatment plants use ozone micro-nano bubbles to degrade pollutants with stable structure and low biodegradability in wastewater, they often set up a separate ozone advanced oxidation unit, which not only increases the floor space of the sewage treatment system, but also increases the cost of sewage treatment. Summary of the invention

[0006] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide a pipeline ozone advanced oxidation reaction device and its application, which has the advantages of high reaction efficiency, long reaction time, small footprint, economy and environmental protection.

[0007] The present invention is achieved through the following technical solutions:

[0008] The first aspect of the present invention provides a pipeline ozone advanced oxidation reaction device, the device comprising: a pipeline reactor, an ozone generator, and a micro-nano bubble generator;

[0009] The pipeline reactor is a tubular structure, which can be used as a part of a transport pipeline;

[0010] A nozzle is provided in the inner cavity of the pipeline reactor;

[0011] The ozone generator and the micro-nano bubble generator are arranged outside the pipeline reactor, and the outlet of the ozone generator is communicated with the inlet of the micro-nano bubble generator, and the outlet of the micro-nano bubble generator is communicated with the nozzle.

[0012] Preferably, one or more nozzle supports are provided in the inner cavity of the pipeline reactor;

[0013] If a plurality of nozzle supports are provided, the plurality of nozzle supports are evenly arranged along the length direction of the pipeline reactor;

[0014] At least one nozzle is mounted on each nozzle bracket;

[0015] Each nozzle is connected to a micro-nano bubble generator.

[0016] Preferably, one end of the pipeline reactor is a water inlet end, and the other end is a water outlet end;

[0017] A bubble inlet is provided at the water inlet end of the pipeline reactor or on the wall of the pipeline reactor;

[0018] The pipeline connected with the micro-nano bubble generator passes through the bubble inlet and is communicated with the nozzle.

[0019] Preferably, a material inlet is also provided on the wall of the pipeline reactor;

[0020] A material adding device is arranged outside the pipeline reactor, and a pipeline connected to the material adding device passes through the material adding port and is communicated with the nozzle, or is located in the inner cavity of the pipeline reactor.

[0021] Preferably, the length of the pipeline reactor is not less than 5 m.

[0022] Preferably, the diameter of the pipe reactor is 100-1000 mm.

[0023] Preferably, the water flow velocity in the pipeline reactor is 0.6-3 m / s.

[0024] Preferably, an ultraviolet lamp is arranged in the inner cavity of the pipeline reactor.

[0025] The second aspect of the present invention provides a method for applying the above-mentioned pipeline ozone advanced oxidation reaction device, which includes: connecting the water inlet end of the pipeline reactor to the biochemical reaction unit, and connecting the water outlet end to the transportation pipeline; the organic wastewater coming out of the biochemical reaction unit directly enters the pipeline reactor, and in the inner cavity of the pipeline reactor, the organic wastewater reacts with ozone while flowing, and then flows into the transportation pipeline for continued transportation.

[0026] Alternatively, the method includes: connecting the two ends of the pipeline reactor to the transport pipeline respectively, and the organic wastewater enters the pipeline reactor from the transport pipeline connected to the water inlet end of the pipeline reactor, and in the inner cavity of the pipeline reactor, the organic wastewater reacts with ozone while flowing, and then flows into the transport pipeline connected to the water outlet end of the pipeline reactor for continued transportation.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: on the one hand, the present invention introduces ozone into the wastewater in the form of micro-nano bubbles, and utilizes the advantages of small size, slow rising rate, long hydraulic retention time, and internal self-pressurization of the micro-nano bubbles to increase the contact area between ozone and wastewater, enhance the mass transfer efficiency of the gas-liquid interface, further improve the reaction rate of ozone oxidation and extend the reaction time; on the other hand, the present invention can be used as a part of a transportation pipeline, and can realize the advanced oxidation of ozone during the transportation of organic wastewater, avoiding the need to set up a separate ozone advanced oxidation unit, further saving land and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of a pipeline type ozone advanced oxidation reaction device of the present invention;

[0029] Figure 2 Another schematic diagram of a pipeline ozone advanced oxidation reaction device of the present invention. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0031] like Figure 1 and Figure 2 As shown, the present invention provides a pipeline ozone advanced oxidation reaction device, which includes: a pipeline reactor 1, an ozone generator 2, and a micro-nano bubble generator 3. The pipeline reactor 1 is a tubular structure, which can be used as a part of a transport pipeline. A nozzle 4 is arranged in the inner cavity of the pipeline reactor. The ozone generator 2 and the micro-nano bubble generator 3 are arranged outside the pipeline reactor 1, and the outlet of the ozone generator 2 is connected to the inlet of the micro-nano bubble generator, and the outlet of the micro-nano bubble generator is connected to the nozzle 4 in the inner cavity of the pipeline reactor 1.

[0032] The present invention introduces micro-nano-sized ozone bubbles into organic wastewater, utilizing the advantages of small size, slow rising rate, long hydraulic retention time, internal self-pressurization, etc. of the micro-nano bubbles, thereby increasing the contact area between ozone and wastewater, enhancing the mass transfer efficiency of the gas-liquid interface, further improving the reaction rate of ozone oxidation and extending the reaction time; in addition, the pipeline-type ozone advanced oxidation reaction device is embedded in the middle of a transport pipeline as a part of the transport pipeline, so that advanced oxidation of ozone can be achieved during the transportation of organic wastewater, avoiding the need to separately set up an ozone advanced oxidation unit, further saving land and environmental protection.

[0033] The organic wastewater is industrial organic wastewater containing difficult-to-degrade organic matter or tail water that does not meet the standards after treatment and contains difficult-to-degrade organic matter. Regardless of what kind of wastewater is introduced, the wastewater contains difficult-to-biodegrade organic matter, such as aromatic hydrocarbons, polycyclic aromatic hydrocarbons, chlorinated aromatic hydrocarbons, organic acid esters, etc. The present invention is applicable to wastewater containing organic matter that can be decomposed by ozone oxidation.

[0034] Specifically, organic wastewater is introduced into the pipeline reactor 1, and ozone (O3) generated by the ozone generator 2 enters the micro-nano bubble generator 3, and the micro-nano bubble generator 3 continuously delivers ozone micro-nano bubbles into the pipeline reactor 1 through the nozzle 4. The ozone micro-nano bubbles and the organic wastewater are quickly mixed in the pipeline reactor 1 to form a liquid that looks like emulsification (i.e., "milk water"), and flow along the direction of the water flow. In this process, the ozone micro-nano bubbles are fully in contact with the organic wastewater, which promotes the mineralization of the difficult-to-biodegrade organic macromolecules in the wastewater into small molecules, which is beneficial to the regeneration treatment of sewage. The ozone generator 2 and the micro-nano bubble generator 3 are both existing products, which will not be repeated here.

[0035] The present invention creatively introduces ozone into wastewater in the form of micro-nano bubbles, so that the ozone micro-nano bubbles and organic wastewater are evenly mixed in the pipeline reactor 1 to form milk water. The advantages of the micro-nano bubbles, such as small size, slow rising rate, long hydraulic retention time, and internal self-pressurization, are utilized to increase the contact area between ozone and wastewater, enhance the mass transfer efficiency of the gas-liquid interface, further improve the reaction rate of ozone oxidation and prolong the reaction time, promote the mineralization of difficult-to-biodegrade organic macromolecules in the wastewater into small molecules, and facilitate the regeneration treatment of sewage.

[0036] Furthermore, in order to facilitate the installation of the nozzle 4, a nozzle holder 5 for fixing the nozzle 4 is provided in the inner cavity of the pipeline reactor 1. The nozzle holder 5 can adopt a variety of structures, as long as it can support the nozzle and will not block the flow of wastewater. For example, the nozzle holder 5 can be a circular mesh structure, or a holder formed by a plurality of horizontally and vertically staggered support rods, and one or more nozzles 4 are fixedly mounted on the nozzle holder 5, and each nozzle 4 is connected to the micro-nano bubble generator 3. In this way, the ozone micro-nano bubbles generated by the micro-nano bubble generator 3 enter the inner cavity of the pipeline reactor 1 through the nozzle 4, and the nozzle holder 5 will not block the flow of organic wastewater.

[0037] Figure 1 In the embodiment shown, one end of the pipeline reactor 1 is a water inlet, and the other end is a water outlet. The organic wastewater directly enters the pipeline reactor 1 from the water inlet and flows out of the pipeline reactor 1 from the water outlet. At the same time, a bubble inlet is provided at the water inlet of the pipeline reactor 1. The pipeline connected to the micro-nano bubble generator 3 passes through the bubble inlet and is connected to the nozzle 4 located in the inner cavity of the pipeline reactor 1. In this way, ozone is sprayed out through the nozzle 4, and the organic wastewater does not pass through the nozzle 4, but directly enters the pipeline reactor 1. In order to simplify the drawing, Figure 1 Only one arrow entering the pipeline reactor 1 is drawn.

[0038] Figure 2 In the embodiment shown, one end of the pipeline reactor 1 is a water inlet, and the other end is a water outlet. The organic wastewater directly enters the pipeline reactor 1 from the water inlet and flows out of the pipeline reactor 1 from the water outlet. At the same time, a bubble inlet is opened on the wall of the pipeline reactor 1, and the pipeline connected to the micro-nano bubble generator 3 passes through the bubble inlet and is connected to the nozzle 4 located in the inner cavity of the pipeline reactor 1.

[0039] Furthermore, a material adding port is provided on the wall of the pipeline reactor 1, and a material adding device 6 is provided outside the pipeline reactor 1. The pipeline connected to the material adding device 6 passes through the material adding port and is located in the inner cavity of the pipeline reactor 1, or passes through the material adding port and is connected to the nozzle. Catalysts, oxidants, etc. can be added into the pipeline reactor 1 through the material adding device 6.

[0040] If liquid material is used, the material adding device 6 adopts a peristaltic pump, and the pipeline connected to the peristaltic pump passes through the material adding port and is connected to the nozzle 4. The liquid oxidant (such as H2O2) can be introduced into the inner cavity of the pipeline reactor 1 through the peristaltic pump and the connected pipeline, so that H2O2 can be sprayed into the water body in the pipeline reactor 1 through the nozzle 4 together with the ozone micro-nano bubbles delivered by the micro-nano bubble generator 3. The addition of H2O2 can promote the decomposition of ozone into ·OH with stronger oxidizing ability. This combination of ozone and H2O2 can effectively improve the oxidation efficiency of ozone.

[0041] If solid materials are used, the material adding device 6 uses a solid feeder, and the pipeline connected to the solid feeder passes through the material adding port and is located in the inner cavity of the pipeline reactor 1. The solid ozone catalyst is added into the pipeline reactor 1 through the solid feeder, thereby improving the ozone oxidation efficiency. The ozone catalyst can be a catalyst that can homogeneously catalyze the ozone oxidation reaction with ozone, such as a transition metal ion, such as Cu 2+ , Mn 2+ , Fe 3+ , Fe 2+ 、Ni 2+ The homogeneous system formed by the above-mentioned catalysts can also be a catalyst that can perform heterogeneous catalytic ozone oxidation reaction with ozone, such as metal oxides Al2O3, MnO2, NiO / γ-Al2O3, TiO2-Al2O3, etc., or supported metal or metal oxide catalysts, such as CaO, Co, Cu, etc., supported on solid carriers such as activated carbon, honeycomb ceramics, Al2O3, etc. The heterogeneous ozone oxidation process has the advantages of easy catalyst recovery and low secondary pollution, which is more advantageous than the homogeneous ozone oxidation process.

[0042] In another embodiment of the present invention, the length of the pipeline reactor 1 is not less than 5 m. If the length of the pipeline reactor 1 is too short, the ozone is discharged before it has time to undergo oxidation reaction with the wastewater in the pipeline reactor 1, resulting in low ozone utilization rate.

[0043] In another embodiment of the present invention, the diameter of the pipeline reactor 1 is 100-1000 mm. The diameter of the reactor is designed according to the amount of water to be treated (the amount of water divided by the water flow velocity is the cross-sectional area of ​​the reactor), and the water flow velocity is controlled within the range of about 0.6-3 m / s. If the water flow is too small, sludge is likely to accumulate; if the water flow is too large, the impact caused by the water flow is large and is not conducive to the ozone oxidation reaction.

[0044] In another embodiment of the present invention, the material and size of the pipeline reactor 1 are the same as or different from the material and size of the transport pipeline. When the material and size of the pipeline reactor 1 are the same as the material and size of the transport pipeline, it is beneficial to connect the two.

[0045] In another embodiment of the present invention, a nozzle holder 5 is provided in the inner cavity of the pipeline reactor 1, and one or more nozzles 4 are provided on the nozzle holder 5. Alternatively, a plurality of nozzle holders 5 are provided in the inner cavity of the pipeline reactor 1, and the plurality of nozzle holders 5 are evenly arranged along the length direction of the pipeline reactor 1 (i.e., evenly arranged along the water flow direction), and the plane where each nozzle holder 5 is located is perpendicular to the length direction of the pipeline reactor 1, i.e., perpendicular to the water flow direction. The other end of the pipeline connected to the micro-nano bubble generator 3 is divided into a plurality of branch pipes, each branch pipe is connected to a nozzle 4, so that bubbles can be sprayed into the inner cavity of the pipeline reactor 1 through each nozzle 4.

[0046] If the size of the ozone bubbles is too large, it is not conducive to gas-liquid contact and will affect the efficiency of ozone oxidation. Therefore, in another embodiment of the present invention, the size of the bubbles generated by the micro-nano bubble generator 3 is generally less than 100 μm, and bubbles of this size can be obtained by using an existing bubble generator.

[0047] In another embodiment of the present invention, an ultraviolet lamp is arranged in the inner cavity of the pipeline reactor 1, ozone is combined with ultraviolet irradiation, and the energy generated by ultraviolet radiation is used to decompose ozone to produce a large amount of ·OH with stronger oxidizing ability, thereby improving the oxidation efficiency of ozone and deeply mineralizing organic pollutants.

[0048] When in use, the pipeline ozone advanced oxidation reaction device can be set at the front end of the transport pipeline, that is, the water inlet end of the pipeline reactor 1 is connected to the biochemical reaction unit (it can be connected to the biochemical reaction unit using various existing structures, such as flanges, welding, etc.), and the water outlet end is connected to the transport pipeline (it can be connected to the transport pipeline using various existing structures, such as flanges, welding, etc.), that is, the pipeline reactor 1 is the frontmost part of the transport pipeline, and the water coming out of the biochemical reaction unit directly enters the pipeline reactor 1, and the water coming out of the pipeline reactor 1 enters the transport pipeline for continued transportation. The organic wastewater coming out of the biochemical reaction unit directly enters the pipeline reactor 1, and in the inner cavity of the pipeline reactor 1, the organic wastewater reacts with the ozone micro-nano bubbles while flowing, and then flows into the transport pipeline for continued transportation.

[0049] The pipeline ozone advanced oxidation reaction device can also be embedded in the middle section of the transport pipeline along the water flow direction, that is, the pipeline reactor 1 is used as the middle part of the transport pipeline, and its water inlet and water outlet are respectively connected to the transport pipelines located at both ends of the pipeline reactor 1. The organic wastewater enters the pipeline reactor 1 from the transport pipeline connected to the water inlet end of the pipeline reactor 1. In the inner cavity of the pipeline reactor 1, the organic wastewater reacts with the ozone micro-nano bubbles while flowing, and then flows into the transport pipeline connected to the water outlet for continued transportation.

[0050] Both of the above two usage modes can enable the organic wastewater to achieve ozone advanced oxidation reaction during transportation, that is, the device of the present invention not only completes the transportation work as a part of the transportation pipeline, but also completes the work of ozone advanced oxidation. Therefore, the present invention avoids the need to separately add an ozone advanced oxidation unit, further saving land and cost.

[0051] Specifically, Figure 1 In the embodiment shown, the size of the pipeline reactor 1 is the same as that of the transport pipeline, and the diameter is 80 mm. The pipeline reactor is arranged at the front end of the transport pipeline. An ozone generator 2 and a micro-nano bubble generator 3 connected thereto are arranged near the pipeline reactor. One or more nozzles 4 connected to the micro-nano bubble generator 3 are arranged at the center of the pipeline reactor to continuously transport ozone micro-nano bubbles into the pipeline reactor 1. The organic wastewater introduced into the pipeline reactor 1 is substandard tail water after biological treatment, which contains organic matter that is difficult to biodegrade. These organic wastewaters that are difficult to biodegrade are mixed with ozone micro-nano bubbles in the pipeline reactor 1 to form milk water, so that the organic matter that is difficult to biodegrade in the wastewater is fully contacted with ozone molecules, and the organic macromolecules that are difficult to biodegrade in the wastewater are mineralized into small molecules. The device is used to carry out ozone advanced oxidation treatment of substandard tail water after biological treatment. The average COD of the organic wastewater entering the device is 150g / m 3 The average NH4-N is 45g / m 3 , total nitrogen is 50g / m 3 Under the condition of ozone dosage of 60mg / L, 96% of COD and 92% of total nitrogen were removed by the device, and the water flowing out of the device reached the Class IV water standard of the "Surface Water Environmental Quality Standard" (GB3838-2002).

[0052] Figure 2In the embodiment shown, the size of the pipeline reactor 1 is the same as that of the transport pipeline, and the diameter is 100 mm, and the pipeline reactor is embedded in the middle of the transport pipeline. An ozone generator 2 and a micro-nano bubble generator 3 connected thereto are arranged near the pipeline reactor 1. Three nozzles 4 connected to the micro-nano bubble generator 3 are arranged in the middle of the pipeline reactor 1 to continuously transport ozone micro-nano bubbles into the pipeline reactor 1. In order to improve the ozone oxidation efficiency, a certain concentration of H2O2 is also added to the pipeline reactor 1 through the material adding device 6 (an ozone catalyst can also be added at the same time or an ultraviolet irradiation lamp is arranged in the inner cavity of the pipeline reactor 1). The industrial wastewater flowing into the pipeline reactor 1 through the transport pipeline contains difficult biodegradable organic matter, which is mixed with H2O2 and ozone micro-nano bubbles in the pipeline reactor 1 to form milk water, so that the difficult biodegradable organic matter in the wastewater is fully contacted with the ozone molecules, and the difficult biodegradable organic macromolecules in the wastewater are mineralized into small molecules under the joint action of ozone and H2O2. The device is used for industrial organic treatment. The average COD of organic wastewater entering the device is 500g / m 3 , average NH4-N is 50g / m 3 , total nitrogen is 58g / m 3 , under the conditions of ozone dosage of 80mg / L and O3 to H2O2 molar ratio of 2, continuous operation was carried out, and 60% of COD and 70% of total nitrogen were removed by the device.

[0053] In summary, the present invention provides a pipeline ozone advanced oxidation reaction device, which uses the reactor to treat organic wastewater, forms milk water by introducing micro-nano-sized ozone bubbles in the pipeline reactor, and flows along the direction of the water flow. In this process, the ozone micro-nano bubbles are fully in contact with the organic wastewater, which promotes the mineralization of the difficult biodegradable organic macromolecules in the wastewater into small molecules, which is beneficial to the regeneration treatment of sewage. The present invention increases the contact area between ozone and wastewater, enhances the mass transfer efficiency of the gas-liquid interface, further improves the reaction rate of ozone oxidation and prolongs the reaction time, and has the advantages of high mass transfer efficiency, long reaction time, small footprint, economy and environmental protection. Moreover, the present invention avoids the separate setting of ozone advanced oxidation unit, and can realize the advanced oxidation of ozone during the transportation of organic wastewater, which can avoid the separate setting of ozone advanced oxidation unit, further saves land and saves costs. Therefore, the pipeline ozone advanced oxidation reaction device of the present invention has the advantages of high mass transfer efficiency, long reaction time, small footprint, economy and environmental protection.

[0054] In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0055] The above technical solution is only one implementation mode of the present invention. For those skilled in the art, it is easy to make various types of improvements or modifications based on the principles disclosed in the present invention, and it is not limited to the technical solution described in the above specific embodiments of the present invention. Therefore, the above description is only preferred and does not have a restrictive meaning.

Claims

1. A pipeline ozone advanced oxidation reaction device, characterized in that: The device comprises: a pipeline reactor, an ozone generator, and a micro-nano bubble generator; The pipeline reactor is a tubular structure, which can be used as a part of a transport pipeline; A nozzle is provided in the inner cavity of the pipeline reactor; The ozone generator and the micro-nano bubble generator are arranged outside the pipeline reactor, and the outlet of the ozone generator is communicated with the inlet of the micro-nano bubble generator, and the outlet of the micro-nano bubble generator is communicated with the nozzle.

2. The pipeline type ozone advanced oxidation reaction device according to claim 1 is characterized in that: One or more nozzle holders are arranged in the inner cavity of the pipeline reactor; If a plurality of nozzle supports are provided, the plurality of nozzle supports are evenly arranged along the length direction of the pipeline reactor; At least one nozzle is mounted on each nozzle bracket; Each nozzle is connected to a micro-nano bubble generator.

3. The pipeline type ozone advanced oxidation reaction device according to claim 1 is characterized in that: One end of the pipeline reactor is a water inlet end, and the other end is a water outlet end; A bubble inlet is provided at the water inlet end of the pipeline reactor or on the wall of the pipeline reactor; The pipeline connected with the micro-nano bubble generator passes through the bubble inlet and is communicated with the nozzle.

4. The pipeline type ozone advanced oxidation reaction device according to claim 3 is characterized in that: A material inlet is also provided on the wall of the pipeline reactor; A material adding device is arranged outside the pipeline reactor, and a pipeline connected to the material adding device passes through the material adding port and is communicated with the nozzle, or is located in the inner cavity of the pipeline reactor.

5. The pipeline type ozone advanced oxidation reaction device according to claim 1 is characterized in that: The length of the pipeline reactor is not less than 5m.

6. The pipeline type ozone advanced oxidation reaction device according to claim 1 is characterized in that: The diameter of the pipeline reactor is 100-1000 mm.

7. The pipeline type ozone advanced oxidation reaction device according to claim 1 is characterized in that: The water flow velocity in the pipeline reactor is 0.6-3 m / s.

8. The pipeline type ozone advanced oxidation reaction device according to claim 1 is characterized in that: An ultraviolet lamp is arranged in the inner cavity of the pipeline reactor.

9. A method for using the pipeline ozone advanced oxidation reaction device according to any one of claims 1 to 8, characterized in that: The method comprises: connecting the water inlet end of the pipeline reactor with the biochemical reaction unit, and connecting the water outlet end with the transport pipeline; the organic wastewater from the biochemical reaction unit directly enters the pipeline reactor, and in the inner cavity of the pipeline reactor, the organic wastewater reacts with the ozone micro-nano bubbles while flowing, and then flows into the transport pipeline for continued transportation.

10. A method for using the pipeline ozone advanced oxidation reaction device according to any one of claims 1 to 8, characterized in that: The method comprises: connecting the two ends of a pipeline reactor to a transport pipeline respectively, allowing organic wastewater to enter the pipeline reactor from the transport pipeline connected to the water inlet end of the pipeline reactor, reacting with ozone micro-nano bubbles in the inner cavity of the pipeline reactor while flowing, and then flowing into the transport pipeline connected to the water outlet end of the pipeline reactor for continued transportation.

Images