Gas-liquid reaction system

Abstract

The invention discloses a gas-liquid reaction system. The gas-liquid reaction system comprises a wastewater pool, an ozone generator, an oxidation reaction tank and a first micro-interface generator located in the oxidation reaction tank. An inlet of the first micro-interface generator is communicated with the wastewater pool and the ozone generator, and an outlet of the first micro-interface generator is communicated with the inside of the oxidation reaction tank. Therefore, wastewater in the wastewater pool and ozone produced by the ozone generator can be simultaneously conveyed to the first micro-interface generator, the wastewater and the ozone oppositely run in the first micro-interface generator to crush and disperse the ozone into micron-sized ozone micro-bubbles, and the mass transfer area between the ozone micro-bubbles and the wastewater in the oxidation reaction tank can be increased by the ozone micro-bubbles; the oxidation reaction between the ozone and the wastewater is promoted, so that the utilization rate of the ozone is improved. As the oxidation reaction tank is communicated with the wastewater pool, unreacted ozone in the oxidation reaction tank can be conveyed into the wastewater pool to oxidize wastewater, so that the unreacted ozone is fully utilized, and zero emission of ozone is realized.

Description

Technical Field

[0001] The present application belongs to the technical field of wastewater treatment, and specifically relates to a gas-liquid reaction system. Background Art

[0002] With the upgrading of environmental protection policies, the requirements for wastewater effluent standards are becoming increasingly stringent. Ozone oxidation, as an advanced oxidation technology, is often used in the post-treatment stage of biochemical effluent to achieve wastewater quality upgrades.

[0003] In related technologies, due to the low solubility of ozone in water and the high interfacial resistance between the gas-liquid reaction phases, the ozone utilization rate in typical gas-liquid bubbling reactors is approximately 50% to 60%, which is low. When using contact tanks for reactions, the ozone utilization rate is even lower. Unreacted ozone cannot be promptly processed, causing air pollution and wasting ozone resources. Summary of the Invention

[0004] In order to solve the technical problem in the related art that unreacted ozone cannot be promptly treated during wastewater treatment, causing air pollution and waste of ozone resources, the present application provides a gas-liquid reaction system, which includes:

[0005] wastewater ponds;

[0006] ozone generator;

[0007] an oxidation reaction tank, connected to the wastewater tank;

[0008] A first micro-interface generator, wherein the inlet of the first micro-interface generator is communicated with the wastewater pool and the ozone generator, and the outlet of the first micro-interface generator is communicated with the interior of the oxidation reaction tank.

[0009] In some embodiments, the gas-liquid reaction system further comprises:

[0010] A gas-liquid storage tank is connected to the water outlet of the oxidation reaction tank, and a gas outlet of the gas-liquid storage tank is connected to the wastewater pool.

[0011] In some embodiments, the gas-liquid reaction system further comprises:

[0012] A second micro-interface generator, the inlet of the second micro-interface generator is connected to the ozone generator and the gas outlet of the gas-liquid storage tank, and the outlet of the second micro-interface generator is toward the bottom of the oxidation reaction tank.

[0013] In some embodiments, the second micro-interface generator is a pneumatic micro-interface generator.

[0014] In some embodiments, the gas-liquid reaction system further comprises:

[0015] The gas distribution pipe is connected to the second micro-interface generator and extends to the bottom of the oxidation reaction tank.

[0016] In some embodiments, a first nozzle is configured at one end of the gas distribution pipe away from the second micro-interface generator, a second nozzle is configured at the outlet of the first micro-interface generator, and the outlet of the first nozzle is arranged opposite to the outlet of the second nozzle.

[0017] In some embodiments, the gas-liquid reaction system further comprises:

[0018] The third micro-interface generator is located in the wastewater pool and is connected to the gas-liquid storage tank.

[0019] In some embodiments, a plurality of stirring paddles are provided on the inner wall of the oxidation reaction tank.

[0020] In some embodiments, the gas-liquid reaction system further comprises:

[0021] A feed pump, the output end of which is connected to the wastewater tank;

[0022] The liquid filter is arranged between the output end of the feed pump and the wastewater tank.

[0023] In some embodiments, the wastewater tank is connected to an ozone eliminator.

[0024] According to the gas-liquid reaction system provided by one or more embodiments of the present application, the gas-liquid reaction system includes a wastewater tank, an ozone generator, an oxidation reaction tank, and a first micro-interface generator located in the oxidation reaction tank. Since the inlet of the first micro-interface generator is connected to the wastewater tank and the ozone generator, and the outlet of the first micro-interface generator is connected to the interior of the oxidation reaction tank, the wastewater in the wastewater tank and the ozone produced by the ozone generator can be simultaneously transported to the first micro-interface generator. The wastewater and ozone run in opposite directions in the first micro-interface generator to break up and disperse the ozone into micron-sized ozone microbubbles, so as to increase the mass transfer area between the ozone and the wastewater in the oxidation reaction tank, promote the occurrence of the oxidation reaction between the ozone and the wastewater, and thus improve the utilization rate of the ozone. Since the oxidation reaction tank is connected to the wastewater tank, the unreacted ozone in the oxidation reaction tank can be transported to the oxidized wastewater in the wastewater tank, so that the unreacted ozone can be fully utilized and zero emission of ozone can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of the gas-liquid reaction system in one or more embodiments of the present application.

[0026] Description of reference numerals:

[0027] 1. Wastewater pool; 101. Third micro-interface generator; 3. Ozone generator; 4. Oxidation reaction tank; 401. First micro-interface generator; 402. Second micro-interface generator; 403. Gas distribution pipe; 404. First nozzle; 405. Second nozzle; 406. Stirring paddle; 5. Gas-liquid storage tank; 6. Liquid filter; 7. Water inlet; 801. First air inlet; 802. Second air inlet; 9. Water outlet; 10. Gas outlet; 11. Ozone eliminator. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to understand the present application more clearly, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of this application.

[0029] With the upgrading of environmental protection policies, the requirements for wastewater effluent standards are becoming increasingly stringent. Ozone oxidation, as an advanced oxidation technology, is often used in the post-treatment stage of biochemical effluent to achieve wastewater quality upgrades.

[0030] In related technologies, due to the low solubility of ozone in water and the high interfacial resistance between the gas-liquid reaction phases, the ozone utilization rate in typical gas-liquid bubbling reactors is approximately 50% to 60%, which is low. When using contact tanks for reactions, the ozone utilization rate is even lower. Unreacted ozone cannot be promptly processed, causing air pollution and wasting ozone resources.

[0031] To solve the above technical problems, the present application provides a gas-liquid reaction system, which includes a wastewater tank 1, an ozone generator 3, an oxidation reaction tank 4, and a first micro-interface generator 401. The first micro-interface generator 401 is located in the oxidation reaction tank 4. Since the inlet of the first micro-interface generator 401 is connected to the wastewater tank 1 and the ozone generator 3, and the outlet of the first micro-interface generator 401 is connected to the interior of the oxidation reaction tank 4, the wastewater in the wastewater tank 1 and the ozone produced by the ozone generator 3 can be simultaneously transported to the first micro-interface generator 401 through corresponding pipes. The wastewater and ozone flow towards each other in the first micro-interface generator 401, breaking up and dispersing the ozone into micron-sized ozone bubbles, thereby increasing the mass transfer area between the ozone and the wastewater in the oxidation reaction tank 4, extending the oxidation reaction time between the ozone and the wastewater, promoting the occurrence of the oxidation reaction between the ozone and the wastewater, and improving the reaction effect between the ozone and the wastewater, thereby reducing ozone waste and improving ozone utilization.

[0032] It should be noted that the wastewater and ozone treated by the first micro-interface generator 401 are broken and dispersed to form a gas-liquid micro-interface system, and the gas-liquid micro-interface body is transported to the oxidation reaction tank 4 through the outlet of the first micro-interface generator 401, so that ozone and wastewater are transported to the oxidation reaction tank 4.

[0033] The first micro-interface generator 401 can be configured into different structures and forms. For details, please refer to patent application numbers CN201610641119.6, CN201610641251.7, CN201710766435.0, CN105903425A, CN109437390A, CN205833127U and CN207581700U, etc. This application will not go into details.

[0034] Since the oxidation reaction tank 4 is connected to the wastewater pool 1, the unreacted ozone in the oxidation reaction tank 4 can be transported to the wastewater pool 1 through the corresponding pipeline. The unreacted ozone can oxidize the wastewater in the wastewater pool 1, so that the unreacted ozone can be fully utilized to achieve zero ozone emissions. At the same time, it can also prevent the emission of unreacted ozone from causing air pollution and waste of ozone resources.

[0035] It should be noted that the oxidation reaction tank 4 is provided with a water inlet 7. A corresponding pipe connected to the wastewater tank 1 is provided through the water inlet 7 and communicates with the first micro-interface generator 401. In this way, the wastewater in the wastewater tank 1 can be transported to the first micro-interface generator 401 through the corresponding pipe. At the same time, a pump body is installed in the corresponding pipe connected to the wastewater tank 1. The pump body can provide a driving force for transporting the wastewater, facilitating the transportation of the wastewater from the wastewater tank 1 to the first micro-interface generator 401.

[0036] The gas-liquid reaction system also includes a gas-liquid storage tank 5, which is connected to the water outlet 9 of the oxidation reaction tank 4 through a corresponding pipeline. The unreacted ozone and the oxidizing liquid carried by the ozone in the oxidation reaction tank 4 are transported to the gas-liquid storage tank 5 through the water outlet 9 and the corresponding pipeline. The gas outlet 10 of the gas-liquid storage tank 5 is connected to the wastewater tank 1, so that the unreacted ozone stored in the gas-liquid storage tank 5 can be transported to the wastewater tank 1 through the corresponding pipeline, so that the unreacted ozone can be fully utilized. When the oxidizing liquid stored in the gas-liquid storage tank 5 reaches a certain amount, it can be discharged through the drain port of the gas-liquid storage tank 5, and the discharged oxidizing liquid is transported to the wastewater tank 1, realizing the cyclic oxidation treatment of the wastewater and ensuring the oxidation treatment effect of the wastewater.

[0037] To improve the fragmentation and dispersion effect of ozone, the gas-liquid reaction system also includes a second micro-interface generator 402, which is located within the oxidation reaction tank 4. The inlet of the second micro-interface generator 402 is connected to the ozone generator 3 and the gas outlet 10 of the gas-liquid storage tank 5. Specifically, the outlet of the ozone generator 3 can be connected to a first ozone pipe and a second ozone pipe. The oxidation reaction tank 4 is provided with a first air inlet 801 and a second air inlet 802, with the first air inlet 801 located below the second air inlet 802. The first ozone pipe is provided through the first air inlet 801 and is connected to the first micro-interface generator 401 located within the oxidation reaction tank 4. The second ozone pipe is provided through the second air inlet 802 and is connected to the second micro-interface generator 402 located within the oxidation reaction tank 4. This allows the ozone generator 3 to provide the generated ozone to the first micro-interface generator 401 through the first ozone pipe and to the second micro-interface generator 402 through the second ozone pipe. It should be noted that the working principle of the second micro-interface generator 402 is the same as that of the first micro-interface generator 401, and will not be elaborated here.

[0038] Because the inlet of the second micro-interface generator 402 is also connected to the gas outlet 10 of the gas-liquid storage tank 5, the unreacted ozone stored in the gas-liquid storage tank 5 can be transported to the second micro-interface generator 402 through the corresponding pipeline. The second micro-interface generator 402 is located above the interior of the oxidation reaction tank 4, and the first micro-interface generator 401 is located at the bottom of the interior of the oxidation reaction tank 4. As the first micro-interface generator 401 operates, the gas-liquid micro-interface system (including ozone microbubbles and wastewater microbubbles) obtained by the fragmentation and dispersion of the first micro-interface generator 401 is transported into the oxidation reaction tank 4 until the gas-liquid micro-interface system rises in the oxidation reaction tank 4 to submerge the second micro-interface generator 402. During the operation of the second micro-interface generator 402, under the action of self-priming force, the wastewater is transported to the second micro-interface generator 402 through the liquid inlet of the second micro-interface generator 402, and the ozone generated by the ozone generator 3 is transported to the second micro-interface generator 402 through the second ozone pipe. The wastewater and ozone run towards each other in the second micro-interface generator 402 to break up and disperse the ozone into micron-sized ozone microbubbles, so as to increase the mass transfer area between the ozone and the wastewater in the oxidation reaction tank 4, extend the oxidation reaction time between the ozone and the wastewater, promote the occurrence of the oxidation reaction between the ozone and the wastewater, and improve the reaction effect between the ozone and the wastewater, thereby reducing the waste of ozone and improving the utilization rate of ozone.

[0039] In this way, part of the unreacted ozone stored in the gas-liquid storage tank 5 is returned to the second micro-interface generator 402 in the oxidation reaction tank 4, and the other part is transported to the wastewater pool 1 through the corresponding pipeline to oxidize the wastewater, so that the unreacted ozone can be fully utilized, achieving zero ozone emissions, and at the same time preventing the emission of unreacted ozone from polluting the environment, thereby achieving energy conservation and environmental protection.

[0040] To increase the residence time of the ozone microbubbles fragmented and dispersed by the second micro-interface generator 402 in the wastewater within the oxidation reaction tank 4, the gas-liquid reaction system further includes a gas distribution pipe 403, which is connected to the second micro-interface generator 402 and extends to the bottom of the oxidation reaction tank 4, thereby evenly distributing the ozone microbubbles within the oxidation reaction tank 4. Due to the increased degree of fragmentation and dispersion of the ozone, the ozone microbubbles can be more microbubbled, the speed of the ozone microbubbles in the wastewater can be reduced, and the residence time of the ozone microbubbles in the wastewater can be increased, thereby promoting the oxidation reaction between the ozone and the wastewater, thereby improving the utilization rate of the ozone. At the same time, the ozone microbubbles move from the bottom to the top of the oxidation reaction tank 4, which can extend the contact time between the ozone and the wastewater, promote the oxidation reaction between the ozone and the wastewater, and improve the oxidation treatment effect of the wastewater.

[0041] The second microinterface generator 402 is located above the first microinterface generator 401 and is arranged on the same vertical line with the first microinterface generator 401. In this way, the gas-liquid microinterface system output from the second microinterface generator 402 can be offset by the gas-liquid microinterface system output from the first microinterface generator 401 through the gas distribution pipe 403, and the ozone is broken and dispersed again, thereby improving the degree of breakage and dispersion of the ozone, increasing the mass transfer area between the ozone microbubbles and the wastewater, extending the oxidation reaction time between the ozone and the wastewater, promoting the occurrence of the oxidation reaction between the ozone and the wastewater, and improving the oxidation reaction effect between the ozone and the wastewater, thereby improving the oxidation treatment effect of the wastewater.

[0042] In order to improve the degree of fragmentation and dispersion of ozone during the hedging process, a first nozzle 404 is provided at one end of the gas distribution pipe 403 away from the second micro-interface generator 402, and a second nozzle 405 is provided at the outlet of the first micro-interface generator 401. The first nozzle 404 realizes the transmission and diffusion of the gas-liquid micro-interface system output by the second micro-interface generator 402, and the second nozzle 405 can realize the transmission and diffusion of the gas-liquid micro-interface system output by the first micro-interface generator 401. Since the outlet of the first nozzle 404 and the outlet of the second nozzle 405 are arranged relative to each other, accurate hedging between the gas-liquid micro-interface system output by the first micro-interface generator 401 and the gas-liquid micro-interface system output by the second micro-interface generator 402 through the gas distribution pipe 403 can be achieved, thereby improving the degree of re-fragmentation and dispersion of ozone, increasing the mass transfer area between ozone microbubbles and wastewater, extending the oxidation reaction time between ozone and wastewater, promoting the occurrence of the oxidation reaction between ozone and wastewater, and improving the oxidation reaction effect between ozone and wastewater, thereby improving the utilization rate of ozone.

[0043] It should be noted that the first micro-interface generator 401 and the second micro-interface generator 402 are arranged in pairs, and the number of first micro-interface generators 401 and the number of second micro-interface generators 402 can be multiple. Multiple first micro-interface generators 401 are connected in series and connected to the ozone generator 3 through the first ozone pipe. Multiple second micro-interface generators 402 are connected in series and connected to the ozone generator 3 through the second ozone pipe, and are connected to the wastewater tank 1 through corresponding pipes. The arrangement of multiple first micro-interface generators 401 and multiple second micro-interface generators 402 can improve the degree of fragmentation and dispersion of ozone and its efficiency, increase the mass transfer area between ozone microbubbles and wastewater, promote the occurrence of oxidation reactions between ozone and wastewater, and improve the utilization rate of ozone.

[0044] It should be noted that the first micro-interface generator 401 and the second micro-interface generator 402 can respectively break up ozone and wastewater into microbubbles at the micron level, thereby increasing the residence time of ozone in wastewater, slowing down the rising speed of ozone, extending the reaction time between ozone and wastewater, promoting the occurrence of oxidation reaction between ozone and wastewater, and improving the reaction effect between ozone and wastewater, thereby improving the utilization rate of ozone.

[0045] To enhance mixing between the ozone microbubbles and the wastewater within the oxidation reaction tank 4, a plurality of stirring paddles 406 are provided on the inner wall of the oxidation reaction tank 4. Specifically, the oxidation reaction tank 4 can be a circular reaction tank, cylindrical and vertically positioned, with a first microinterface generator 401 located at the bottom of the oxidation reaction tank 4 and a second microinterface generator 402 located above the first microinterface generator 401. The inner wall of the oxidation reaction tank 4 is provided with a plurality of stirring paddles 406. The stirring paddles 406 can stir the ozone microbubbles and wastewater within the oxidation reaction tank 4, ensuring sufficient mixing and contact between the ozone microbubbles and the wastewater within the oxidation reaction tank 4, thereby promoting the oxidation reaction between the ozone and the wastewater, increasing the utilization rate of the ozone, and improving the oxidation treatment effect of the wastewater.

[0046] The gas-liquid reaction system also includes a third micro-interface generator 101, which is located in the wastewater pool 1. The gas outlet 10 of the gas-liquid storage tank 5 is connected to the third micro-interface generator 101 through a corresponding pipeline. The unreacted ozone in the gas-liquid storage tank 5 is transported to the third micro-interface generator 101 through the corresponding pipeline. The third micro-interface generator 101 crushes and disperses the unreacted ozone to form ozone microbubbles, so that the ozone microbubbles react with the wastewater in the wastewater pool 1 to achieve preliminary oxidation of the wastewater in the wastewater pool 1. The unreacted ozone can be fully utilized to achieve zero ozone emissions. At the same time, it can prevent the emission of unreacted ozone from polluting the environment and wasting ozone resources.

[0047] There can be multiple third micro-interface generators 101, which are connected in series and connected to the gas outlet 10 of the gas-liquid storage tank 5 through corresponding pipelines. This can improve the degree and efficiency of ozone fragmentation and dispersion, and increase the mass transfer area between ozone microbubbles and wastewater in the wastewater pool 1.

[0048] It should be noted that the operating principle of third micro-interface generator 101 is the same as that of first micro-interface generator 401 and is not further described here. The microbubbles dispersed by first micro-interface generator 401, second micro-interface generator 402, and third micro-interface generator 101 include micron-sized microbubbles and nanometer-sized microbubbles, with micron-sized microbubbles being the majority.

[0049] In order to facilitate the collection of wastewater in the wastewater tank 1, the gas-liquid reaction system also includes a feed pump and a liquid filter 6. The liquid filter 6 is arranged between the feed pump and the wastewater tank 1. The wastewater is transported to the wastewater tank 1 through the feed pump and the liquid filter 6. The liquid filter 6 is used to filter impurities in the wastewater.

[0050] In order to further prevent the discharge of ozone in the wastewater pool 1 from polluting the environment, an ozone eliminator 11 is connected to the top of the wastewater pool 1. The ozone eliminator 11 is used to absorb and eliminate the ozone discharged from the wastewater pool 1, prevent ozone from being discharged from the wastewater pool 1 and polluting the environment, and ensure zero ozone emissions.

[0051] The gas-liquid reaction system of the present application integrates the oxidation reaction tank 4 with the micro-interface technology. The overall structure of the gas-liquid reaction system is simple, which can effectively improve the treatment effect of wastewater, achieve zero ozone emissions, improve the utilization rate of ozone, and thus reduce the cost of wastewater treatment.

[0052] The gas-liquid reaction system operates as follows: air or oxygen is converted into ozone through ozone generator 3 and then introduced into first and second micro-interface generators 401, 402, respectively, where it is broken down and dispersed into ozone microbubbles. Wastewater is filtered through liquid filter 6 and then enters wastewater tank 1. The wastewater in wastewater tank 1 is pressurized by a delivery pump and then enters first micro-interface generator 401. First micro-interface generator 401 breaks down and disperses the wastewater and ozone into a gas-liquid micro-interface system, which is then transported to oxidation reaction tank 4. The ozone microbubbles broken down and dispersed by first and second micro-interface generators 401, 402, fully contact the wastewater in oxidation reaction tank 4, increasing the mass transfer area between the ozone and wastewater, extending the oxidation reaction time between the ozone and wastewater, and promoting the oxidation reaction between the ozone and wastewater, thereby improving ozone utilization.

[0053] Unreacted ozone in oxidation reaction tank 4 is passed into a third micro-interface generator 101 located within wastewater tank 1, where it is broken down and dispersed into ozone microbubbles. These ozone microbubbles then undergo an oxidation reaction with the wastewater within tank 1, fully utilizing the remaining unreacted ozone and achieving zero ozone emissions. This gas-liquid reaction system offers a simple operation process, mild reaction conditions, low energy consumption, and enhanced ozone-waste oxidation treatment efficiency.

[0054] In order to verify that the gas-liquid reaction system can improve the oxidation treatment effect between ozone and wastewater, the inventors conducted experiments:

[0055] Comparative Example 1

[0056] The difference between Comparative Example 1 and the present application is that the gas distribution pipe 403 is not provided.

[0057] Comparative Example 2

[0058] The difference between Comparative Example 2 and the present application is that the second micro-interface generator 402 and the gas distribution pipe 403 are not provided.

[0059] Comparative Example 3

[0060] The difference between Comparative Example 3 and the present application is that the first micro-interface generator 401 and the second micro-interface generator 402 are not on the same vertical line.

[0061] Comparative Example 4

[0062] The difference between Comparative Example 4 and the present application is that no micro-interface generator is provided and a gas bubbling device is used.

[0063] Experimental Example: Taking the wastewater of a chemical gas-liquid product as an example, the wastewater was treated using the gas-liquid reaction systems of this application, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4 respectively.

[0064] The wastewater flow rate was 60 L / h, the COD (Chemical Oxygen Demand) was 100 mg / L, the gas flow rate was 3 L / min, and the average ozone concentration was 60 mg / L. The COD content in the liquid discharged from gas-liquid storage tank 5 was tested. A wastewater storage tank was used to simulate wastewater pool 1, and an ozone detector was used to measure the ozone concentration in the gas discharged from the wastewater tank. The test results are shown in Table 1 below.

[0065]

[0066] Table 1

[0067] As can be seen from Table 1, the gas-liquid reaction system in this application can effectively improve the effective utilization rate of ozone, achieve zero ozone emissions, eliminate the need for secondary tail gas purification, and prevent secondary ozone pollution. Treating the test wastewater according to this application achieved an effective ozone utilization rate of 98%, with the remainder being lost due to self-quenching of ozone. The tail gas monitor detected no ozone, and there was no ozone odor on site.

[0068] The 3.3% decrease in COD removal rate in Comparative Example 1 is due to the lack of a gas distribution pipe 403 within the oxidation reaction tank 4 in the gas-liquid reaction system of Comparative Example 1. This increases the resistance to ozone microbubbles transmitted from the second micro-interface generator 402 to the bottom of the oxidation reaction tank 4, slowing the rate and increasing the amount of ozone self-quenching, which in turn decreases ozone utilization. In contrast, the present invention incorporates a first micro-interface generator 401 and a gas distribution pipe 403. The first micro-interface generator 401 can transport ozone microbubbles to the bottom of the oxidation reaction tank 4 via the gas distribution pipe 403, increasing the mass transfer area and contact time between ozone and wastewater. Furthermore, the gas distribution pipe 403 and the gas-liquid microbubble system output by the first micro-interface generator 401 can counteract each other, further fragmenting and dispersing the ozone, improving the degree of ozone fragmentation and dispersion, and increasing the mass transfer area between the ozone microbubbles and the wastewater. This promotes the oxidation reaction between the ozone and wastewater, enhancing the effect of the oxidation reaction between the ozone and wastewater, and thus improving ozone utilization.

[0069] The COD removal rate and ozone effective utilization rate of Comparative Example 2 are lower than those of the present application. This is because the second micro-interface generator 402 and the gas distribution pipe 403 are not set at the top of the oxidation reaction tank 4 in the gas-liquid reaction system of Comparative Example 2. The wastewater in the oxidation reaction tank 4 and the ozone are crushed and dispersed by the first micro-interface generator 401 located at the bottom of the oxidation reaction tank 4 and then react, resulting in a decrease in the ozone utilization rate.

[0070] The COD removal rate and ozone effective utilization rate of Comparative Example 3 are not much different from those of the present application, indicating that the positional relationship between the first micro-interface generator 401 and the second micro-interface generator 402 does not affect the COD removal rate and the ozone effective utilization rate, and it is sufficient to ensure that the outlet of the first nozzle 404 and the outlet of the second nozzle 405 are arranged relative to each other.

[0071] Comparative Example 4 does not use a micro-interface generator but uses a gas bubbling device. Compared with the present application, the COD removal rate and the effective utilization rate of ozone are greatly reduced.

[0072] Through the above experiments, the present application can improve the fragmentation and dispersion effect of ozone, increase the mass transfer area between ozone and wastewater in the oxidation reaction tank 4, extend the oxidation reaction time between ozone and wastewater, improve the reaction effect between ozone and wastewater, reduce ozone waste, and improve the utilization rate of ozone, thereby improving the utilization rate of ozone and the COD removal capacity.

[0073] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0074] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0075] In this application, unless otherwise specified or limited, the terms "connect," "fix," etc. should be understood broadly. For example, "fix" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0076] In addition, the terms "first," "second," and so on, used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0077] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A gas-liquid reaction system, characterized in that: The gas-liquid reaction system comprises: wastewater ponds; ozone generator; an oxidation reaction tank, connected to the wastewater tank; A first micro-interface generator, wherein the inlet of the first micro-interface generator is communicated with the wastewater pool and the ozone generator, and the outlet of the first micro-interface generator is communicated with the interior of the oxidation reaction tank.

2. The gas-liquid reaction system according to claim 1, characterized in that: The gas-liquid reaction system further comprises: A gas-liquid storage tank is connected to the water outlet of the oxidation reaction tank, and a gas outlet of the gas-liquid storage tank is connected to the wastewater pool.

3. The gas-liquid reaction system according to claim 2, characterized in that: The gas-liquid reaction system further comprises: A second micro-interface generator, the inlet of the second micro-interface generator is connected to the ozone generator and the gas outlet of the gas-liquid storage tank, and the outlet of the second micro-interface generator is toward the bottom of the oxidation reaction tank.

4. The gas-liquid reaction system according to claim 3, characterized in that: The second micro-interface generator is a pneumatic micro-interface generator.

5. The gas-liquid reaction system according to claim 3, characterized in that: The gas-liquid reaction system further comprises: The gas distribution pipe is connected to the second micro-interface generator and extends to the bottom of the oxidation reaction tank.

6. The gas-liquid reaction system according to claim 5, characterized in that: A first nozzle is configured at one end of the gas distribution pipe away from the second micro-interface generator, and a second nozzle is configured at the outlet of the first micro-interface generator. The outlet of the first nozzle is arranged opposite to the outlet of the second nozzle.

7. The gas-liquid reaction system according to claim 2, characterized in that: The gas-liquid reaction system further comprises: The third micro-interface generator is located in the wastewater pool and is connected to the gas-liquid storage tank.

8. The gas-liquid reaction system according to any one of claims 1 to 7, characterized in that: A plurality of stirring paddles are arranged on the inner wall of the oxidation reaction tank.

9. The gas-liquid reaction system according to any one of claims 1 to 7, characterized in that: The gas-liquid reaction system further comprises: A feed pump, the output end of which is connected to the wastewater tank; The liquid filter is arranged between the output end of the feed pump and the wastewater tank.

10. The gas-liquid reaction system according to any one of claims 1 to 7, characterized in that: The wastewater pool is connected to an ozone eliminator.

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