Advanced oxidation system for industrial wastewater

Abstract

The utility model provides an advanced oxidation system for industrial wastewater, which comprises an ozone pressurized gas dissolving device, an advanced oxidation tower, an advanced catalysis tower, a reduction tower, a first pH (Potential of Hydrogen) adjusting assembly, a second pH adjusting assembly and a first three-phase separator, and the ozone pressurized gas dissolving device, the advanced oxidation tower, the advanced catalysis tower and the reduction tower are sequentially connected in series through pipelines; the first pH adjusting assembly is connected with the advanced oxidation tower, and the second pH adjusting assembly is connected with the advanced catalysis tower; the first three-phase separator is arranged in an advanced oxidation tower, and a hydrogen peroxide feeding port is formed in the advanced oxidation tower; the first pH adjusting assembly is used for adjusting the pH value of the advanced oxidation tower within a first preset range; the second pH adjusting assembly is used for adjusting the pH value of the advanced catalysis tower within a second preset range, and the second preset range is smaller than the first preset range. The device can be used for accurately controlling variables (such as pH value) in catalytic oxidation reaction, and has the characteristics of simplicity and convenience in operation, small occupied area and low medicament consumption.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, and particularly relates to an advanced oxidation system for industrial wastewater. Background Technique

[0002] The most significant feature of the advanced oxidation process is that through a certain method, hydroxyl radicals (·OH) intermediates are generated in the oxidation system, and (·OH) is used as the main oxidant to react with organic substances. At the same time, organic radicals or organic peroxide radicals can be generated during the reaction to continue the reaction, achieving the purpose of completely decomposing or partially decomposing organic pollutants. Due to the advantages of strong oxidizing property and easy control of operating conditions of the advanced oxidation process, it has attracted the attention of countries around the world, and research and development work in this direction has been carried out successively. The Fenton oxidation process, electrocatalytic oxidation process, and HiPOx process all belong to the advanced oxidation process.

[0003] The Fenton oxidation process is an inorganic chemical reaction. The process is that a mixed solution of hydrogen peroxide (H2O2) and divalent iron ions Fe 2+ oxidizes many known organic compounds such as carboxylic acids, alcohols, and esters to an inorganic state. The Fenton oxidation process has the ability to remove refractory organic pollutants and has a wide range of applications in the treatment of wastewater such as printing and dyeing wastewater, oily wastewater, phenolic wastewater, coking wastewater, nitrobenzene-containing wastewater, and diphenylamine wastewater. However, the Fenton oxidation process consumes a large amount of chemical agents and generates a large amount of sludge.

[0004] The electrocatalytic oxidation process uses electricity as a catalyst and hydrogen peroxide, oxygen, ozone, etc. as oxidants for oxidation reactions. The effect of the electrocatalytic oxidation process is stable, and the utilization rate of hydrogen peroxide can reach more than 90%. However, the service life of the electrodes in the electrocatalytic oxidation process is short, and there are requirements for the influent TDS (Total Dissolved Solids, which refers to the total amount of various solid substances that can be dissolved in water and mainly reflects the content of inorganic salts such as Ca 2+ 、Na + 、K + and organic substances, etc.).

[0005] The HiPOx process is an advanced oxidation process that mainly adds ozone and hydrogen peroxide, uses a special reaction device, and improves the reaction efficiency. Ozone generates strongly oxidizing hydroxyl radicals (·OH) under the catalytic action of hydrogen peroxide. By designing multi-point ozone addition, ozone can be fully contacted with the water quality under the action of water flow, controlling the reaction curve to improve the oxidizing property of ozone. The device of the HiPOx process is mainly composed of an ozone generator, a reactor, and other auxiliary devices such as an oxygen source, a pump, and a dosing system. However, the HiPOx process has more control points and higher engineering investment. Content of the Utility Model

[0006] The purpose of the present utility model is to provide an advanced oxidation system for industrial wastewater, which can precisely control variables (such as pH value) in the catalytic oxidation reaction, and has the characteristics of simple operation, small floor area and low chemical consumption.

[0007] To achieve the above object, the present utility model provides an advanced oxidation system for industrial wastewater, which includes: an ozone pressurized dissolved air device, an advanced oxidation tower, an advanced catalytic tower, a reduction tower, a first pH adjustment component, a second pH adjustment component and a first three-phase separator. The ozone pressurized dissolved air device, the advanced oxidation tower, the advanced catalytic tower and the reduction tower are connected in series through pipelines in sequence. The first pH adjustment component is connected to the advanced oxidation tower, and the second pH adjustment component is connected to the advanced catalytic tower;

[0008] The first three-phase separator is arranged in the advanced oxidation tower, and a hydrogen peroxide dosing port is provided on the advanced oxidation tower;

[0009] The first pH adjustment component is used to adjust the pH value of the advanced oxidation tower within a first preset range;

[0010] The second pH adjustment component is used to adjust the pH value of the advanced catalytic tower within a second preset range, and the second preset range is smaller than the first preset range.

[0011] Optionally, the ozone pressurized dissolved air device includes a pressurized dissolved air tank, an ozone generator and a water inlet component. The pressurized dissolved air tank is respectively communicated with the ozone generator, the water inlet component and the advanced oxidation tower.

[0012] Optionally, a second three-phase separator is arranged in the advanced catalytic tower.

[0013] Optionally, a pipeline mixer is provided on the pipeline connecting the advanced oxidation tower and the advanced catalytic tower.

[0014] Optionally, the first pH adjustment component includes an alkali supplement device and a first pH meter. The alkali supplement device is communicated with the advanced oxidation tower through an alkali supplement pipeline, and the first pH meter is connected to the advanced oxidation tower.

[0015] Optionally, the second pH adjustment component includes an acid supplement device and a second pH meter. The acid supplement device is communicated with the advanced catalytic tower through an acid supplement pipeline, and the second pH meter is connected to the advanced catalytic tower.

[0016] Optionally, the reduction tower is an activated carbon reduction tower.

[0017] Optionally, the system further includes an air outlet assembly, which includes an induced draft fan and an air outlet pipeline. The induced draft fan is arranged on the air outlet pipeline, and the air outlet pipeline is respectively connected to the advanced oxidation tower, the advanced catalytic tower, and the reduction tower.

[0018] Optionally, the system includes a waste gas treatment device, which includes an acid mist absorber and an ammonia water tank. The acid mist absorber is connected to the advanced oxidation tower and the advanced catalytic tower through the air outlet pipeline, and the ammonia water tank is connected to the reduction tower through the air outlet pipeline.

[0019] Optionally, the first preset range is 6.5 - 9.5, and the second preset range is 2.5 - 4.5.

[0020] With the above configuration, by setting the ozone pressurized dissolved air device, more ozone can be dissolved in the same volume of liquid, so that the oxidation reaction occurs more effectively. Moreover, by controlling the pH value of the advanced oxidation tower through the first pH adjustment component and controlling the pH value of the advanced catalytic tower through the second pH adjustment component, the pH value is accurately controlled, thereby reducing the dosage consumption of hydrogen peroxide and effectively improving the utilization rate of hydrogen peroxide. The utility model has the characteristics of simple operation, small floor area, and less chemical consumption. The utility model carefully considers the chemical addition sequence and precisely controls the variables (such as pH value) in the catalytic oxidation reaction. Since the advanced oxidation tower and the advanced catalytic tower are used, civil engineering such as water tanks is not required, greatly shortening the construction period. The utility model has a wide range of applications and can be used for the treatment of industrial wastewater with large water quality fluctuations and restrictions on sludge discharge, for the pretreatment of biologically refractory wastewater, for the advanced treatment after wastewater biochemical treatment, for the treatment of the concentrated water up to the standard in wastewater reuse, for the treatment of toxic and harmful wastewater, and for municipal disinfection and sterilization, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Those of ordinary skill in the art should understand that the provided drawings are used to better understand the utility model and do not constitute any limitation to the scope of the utility model. Among them:

[0022] Figure 1 is a schematic diagram of an advanced oxidation system for industrial wastewater according to an embodiment of the utility model.

[0023] Wherein, the reference numerals are as follows:

[0024] 01 - Acid mist absorber; 02 - Pressure relief valve; 11 - Pressurized dissolved air tank; 12 - Feed water pump; 2 - Advanced oxidation tower; 21 - First three - phase separator; 22 - Hydrogen peroxide dosing port; 23 - First sludge discharge channel; 24 - First sampling assembly; 25 - Dissolved air release device; 3 - Advanced catalytic tower; 31 - Second three - phase separator; 32 - Second sludge discharge channel; 33 - Second sampling assembly; 4 - Reduction tower; 41 - Third sludge discharge channel; 42 - Third sampling assembly; 5 - Pipe mixer; 61 - Alkali supplement device; 611 - Alkali supplement electric valve; 62 - First pH meter; 71 - Acid supplement device; 711 - Acid supplement electric valve; 72 - Second pH meter; 8 - Liquid level gauge; 91 - Induced draft fan; 92 - Outlet air pipeline. Detailed implementation manners

[0025] In this article, unless otherwise specified, the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "top", "bottom", etc. are used to indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation and operation, so it cannot be understood as a limitation to the present utility model.

[0026] The following will describe the detailed implementation manners of the present utility model in more detail with reference to the schematic diagrams. According to the following description, the advantages and features of the present utility model will be clearer. It should be noted that the drawings are all in a very simplified form and use non - precise scales, only for the purpose of conveniently and clearly assisting in explaining the purpose of the embodiments of the present utility model.

[0027] Figure 1 is a schematic diagram of an advanced oxidation system for industrial wastewater according to an embodiment of the present utility model. Please refer to Figure 1 An embodiment of the present utility model provides an advanced oxidation system for industrial wastewater, which includes: an ozone pressurized dissolved air device, an advanced oxidation tower 2, an advanced catalytic tower 3, a reduction tower 4, a first pH adjustment assembly, a second pH adjustment assembly, and a first three - phase separator 21. The advanced oxidation tower 2 is mainly used to oxidize pollutants and easily degradable COD with ozone, and the advanced catalytic tower 3 is mainly used to oxidize refractory COD with hydroxyl radicals. The advanced oxidation tower 2 and the advanced catalytic tower 3 can be made of steel tanks or enamel tanks, etc.

[0028] The ozone pressurized dissolved air device, the advanced oxidation tower 2, the advanced catalytic tower 3, and the reduction tower 4 are connected in series through pipes in sequence. The first pH adjustment assembly is connected to the advanced oxidation tower 2, and the second pH adjustment assembly is connected to the advanced catalytic tower 3.

[0029] Specifically, the ozone pressurized dissolved air device includes a pressurized dissolved air tank 11, an ozone generator, and a water inlet assembly. The pressurized dissolved air tank 11 is respectively connected to the ozone generator, the water inlet assembly, and the advanced oxidation tower 2. Exemplarily, the pressurized dissolved air tank 11 is connected to the upper part of the advanced oxidation tower 2 through a pipeline. The pressurized dissolved air tank 11 transports the liquid dissolved with ozone to the advanced oxidation tower 2 through a pipeline. The water inlet assembly includes a water inlet pump 12, and the water inlet pump 12 is used to pump the liquid into the pressurized dissolved air tank 11. It can be understood that the present utility model adopts the pressurized dissolved air ozone addition method. The ozone generator transports ozone to the pressurized dissolved air tank 11, and the water inlet assembly transports the liquid to the pressurized dissolved air tank 11. The pressurized dissolved air tank 11 dissolves as much ozone as possible in the liquid in the pressurized dissolved air tank 11 under the pressurized condition. More ozone can be dissolved in the liquid of the same volume. The traditional extensive ozone addition method directly passes ozone into the liquid without pressurization. Compared with the traditional ozone addition method, the present utility model has a higher ozone utilization rate, and the ozone utilization rate can be as high as 90%-95%, reducing the investment and operation costs of the water treatment system. The ozone gas is mixed with the liquid through the pressurized dissolved air tank 11 to generate ozone bubbles with a diameter of about 8 microns and suspend in the liquid for a long time to oxidize the pollutants and easily degradable COD in the liquid. Moreover, ozone has a strong bactericidal ability and can effectively eliminate bacteria, viruses, and microorganisms in the liquid. A dissolved air release device 25 is provided in the advanced oxidation tower 2. The liquid dissolved with ozone undergoes pressure reduction and energy dissipation through the dissolved air release device 25 to release a large number of fine bubbles. Exemplarily, the pressurized dissolved air tank 11 is pressure-resistant from 0.2 to 0.7 Mpa, the working pressure of the pressurized dissolved air tank 11 can be 0.35 to 0.5 Mpa, the pressure of the dissolved air release device 25 can be 0.17 to 0.24 Mpa, and the ozone bubbles in the advanced oxidation tower 2 can be 10 to 20 um.

[0030] The first three-phase separator 21 is disposed in the advanced oxidation tower 2. The first three-phase separator 21 is used for the three-phase separation of water, vapor, and solid. For example, in the advanced oxidation tower 2, there will be solid suspensions formed by oxalic acid generated by O3 oxidation and Ca 2+ to form CaC2O4 or CaCO3, and there will also be waste gas. A second three-phase separator 31 is provided in the advanced catalytic tower 3 for the three-phase separation of water, vapor, and solid. Specifically, the first three-phase separator 21 is disposed at the top position of the advanced oxidation tower 2, and the second three-phase separator 31 is disposed at the top position of the advanced catalytic tower 3. In some other embodiments, the second three-phase separator 31 may not be provided in the advanced catalytic tower 3.

[0031] The advanced oxidation tower 2 is provided with a hydrogen peroxide dosing port 22 for dosing hydrogen peroxide. Exemplarily, the hydrogen peroxide dosing port 22 may be located at a position slightly below the advanced oxidation tower 2 and close to the downstream end of the advanced oxidation tower 2. Further, the first pH adjustment assembly is used to adjust the pH value of the advanced oxidation tower 2 within a first preset range, and the second pH adjustment assembly is used to adjust the pH value of the advanced catalytic tower 3 within a second preset range, and the second preset range is smaller than the first preset range. Preferably, the first preset range is 6.5 - 9.5, and the second preset range is 2.5 - 4.5. For example, the pH value of the advanced oxidation tower 2 can be adjusted within the range of 7 - 9, which can reduce the reaction rate of hydrogen peroxide in the advanced oxidation tower 2. The pH value of the advanced catalytic tower 3 can be adjusted to about 3.5, which can increase the reaction rate of hydrogen peroxide in the advanced catalytic tower 3, so that hydrogen peroxide reacts as little as possible in the advanced oxidation tower 2 and as much as possible in the advanced catalytic tower 3, thereby reducing the consumption of hydrogen peroxide and increasing the utilization rate of hydrogen peroxide. The utilization rate of hydrogen peroxide can be increased to more than 95%. It can be understood that ozone will generate strongly oxidizing hydroxyl radicals under the catalytic action of hydrogen peroxide to oxidize the refractory COD in the advanced catalytic tower 3. In addition, the hydroxyl radicals generated by the indirect oxidation of ozone can consume the alkalinity in the liquid, thereby reducing the dosing amount of hydrogen peroxide. Compared with the Fenton oxidation process, the present utility model uses ozone and hydrogen peroxide, which has stronger oxidizing property. It can be understood that in addition to generating 1 mole of hydroxyl radicals in the Fenton reagent, 1 mole of peroxy radicals ·O2 - is also generated, but the oxidation potential of the peroxy radicals is only about 1.3V. Therefore, the main oxidizing agent in the Fenton reagent is the hydroxyl radicals. The present utility model not only has the oxidation effect of hydroxyl radicals but also the oxidation effect of ozone, and has stronger oxidizing property. Moreover, the present utility model does not need to add iron salts, has less sludge, and will not increase the TDS of the liquid.

[0032] Preferably, a pipe mixer 5 is provided on the pipeline connecting the advanced oxidation tower 2 and the advanced catalytic tower 3. The pipe mixer 5 is used to mix hydrogen peroxide and the liquid more evenly, which is beneficial to the subsequent reaction of hydrogen peroxide in the advanced catalytic tower 3. It can be understood that hydrogen peroxide is not dosed in the pipe mixer 5 in the present utility model, but in the advanced oxidation tower 2. The advanced oxidation tower 2 can adjust the pH value through the first pH adjustment assembly, ensuring the safety of hydrogen peroxide use. If hydrogen peroxide is dosed in the pipe mixer 5, the pH value cannot be monitored, which has potential safety hazards. Safety valves and pressure relief valves 02 are provided on the advanced oxidation tower 2, the advanced catalytic tower 3, and the reduction tower 4, further ensuring the safety of the present utility model.

[0033] Further, the first pH adjustment component includes an alkali addition device 61 and a first pH meter 62. The alkali addition device 61 is connected to the advanced oxidation tower 2 through an alkali addition pipeline and is used to add alkali to the advanced oxidation tower 2. The first pH meter 62 is connected to the advanced oxidation tower 2 and is used to detect the pH value of the advanced oxidation tower 2. The second pH adjustment component includes an acid addition device 71 and a second pH meter 72. The acid addition device 71 is connected to the advanced catalytic tower 3 through an acid addition pipeline and is used to add acid to the advanced catalytic tower 3. The second pH meter 72 is connected to the advanced catalytic tower 3 and is used to detect the pH value of the advanced catalytic tower 3. For example, the alkali addition device 61 includes a first controller and an alkali addition electric valve 611. The first controller is electrically connected to the first pH meter 62. The first controller calculates the amount of alkali to be added based on the pH value of the advanced oxidation tower 2 measured by the first pH meter 62 and controls the alkali addition electric valve 611 to add alkali so that the pH value of the advanced oxidation tower 2 is maintained within a first preset range. Similarly, the acid addition device 71 includes a second controller and an acid addition electric valve 711. The second controller is electrically connected to the second pH meter 72. The second controller calculates the amount of acid to be added based on the pH value of the advanced catalytic tower 3 measured by the second pH meter 72 and controls the acid addition electric valve 711 to add acid so that the pH value of the advanced catalytic tower 3 is maintained within a second preset range.

[0034] The reduction tower 4 in this embodiment is an activated carbon reduction tower, which is used to receive the liquid coming out of the advanced catalytic tower 3 and reduce the peroxide products in the liquid. The number of reduction towers 4 can be two, and the two reduction towers 4 are in a parallel relationship to achieve the purpose of one standby and one use. It can be understood that the packing in the reduction tower 4 is activated carbon, and the height of the activated carbon as the packing can be 900 - 1200 mm. Both the advanced catalytic tower 3 and the advanced oxidation tower 2 are provided with liquid level gauges 8 for measuring the liquid level in the tower.

[0035] The advanced catalytic tower 3 and the advanced oxidation tower 2 can be filled with packing, and the packing plays a role in the catalytic reaction. The packing can be, for example, ceramic type, aluminum-based type or carbon-based type. In some embodiments, the advanced catalytic tower 3 and the advanced oxidation tower 2 can also be without packing, and the specific situation is judged according to the water quality of the incoming water. The height of the packing in the advanced oxidation tower 2 can be 600 - 800 mm, and the height of the packing in the advanced catalytic tower 3 can be 1000 - 1200 mm.

[0036] Preferably, the advanced oxidation system for industrial wastewater further includes an air outlet assembly, which includes an induced draft fan 91 and an air outlet pipeline 92. The induced draft fan 91 is arranged on the air outlet pipeline 92, and the air outlet pipeline 92 is respectively connected to the advanced oxidation tower 2, the advanced catalytic tower 3 and the reduction tower 4 for discharging the waste gas in the advanced oxidation tower 2, the advanced catalytic tower 3 and the reduction tower 4. The waste gas in the advanced oxidation tower 2 enters the air outlet pipeline 92 after being separated by the first three-phase separator 21, and the waste gas in the advanced catalytic tower 3 enters the air outlet pipeline 92 after being separated by the second three-phase separator 31. The induced draft fan 91 is used to provide power for discharging the waste gas in the advanced oxidation tower 2, the advanced catalytic tower 3 and the reduction tower 4. Further, the advanced oxidation system for industrial wastewater includes a waste gas treatment device, which includes an acid mist absorber 01 and an ammonia water tank. The acid mist absorber 01 is connected to the advanced oxidation tower 2 and the advanced catalytic tower 3 through the air outlet pipeline 92, and the ammonia water tank is connected to the reduction tower 4 through the air outlet pipeline 92. Considering that the waste gas in the advanced oxidation tower 2 and the advanced catalytic tower 3 may contain acid, the acid mist absorber 01 is provided to treat the waste gas in the advanced oxidation tower 2 and the advanced catalytic tower 3.

[0037] The advanced oxidation system for industrial wastewater further includes a first sludge discharge device, a second sludge discharge device and a third sludge discharge device. The first sludge discharge device includes a first sludge discharge ditch 23 and a first sampling assembly 24. The first sludge discharge ditch 23 and the first sampling assembly 24 are respectively connected to the advanced oxidation tower 2 through pipelines. The first sampling assembly 24 can sample the liquid in the advanced oxidation tower 2. If it is found that there is a large amount of sludge in the sampled liquid, the sludge in the advanced oxidation tower 2 is discharged into the first sludge discharge ditch 23 through the pipeline. Similarly, the second sludge discharge device includes a second sludge discharge ditch 32 and a second sampling assembly 33. The second sludge discharge ditch 32 and the second sampling assembly 33 are respectively connected to the advanced catalytic tower 3 through pipelines. The second sampling assembly 33 can sample the liquid in the advanced catalytic tower 3. If it is found that there is a large amount of sludge in the sampled liquid, the sludge in the advanced catalytic tower 3 is discharged into the second sludge discharge ditch 32 through the pipeline. Similarly, the third sludge discharge device includes a third sludge discharge ditch 41 and a third sampling assembly 42. The third sludge discharge ditch 41 and the third sampling assembly 42 are respectively connected to the reduction tower 4 through pipelines. The third sampling assembly 42 can sample the liquid in the reduction tower 4. If it is found that there is a large amount of sludge in the sampled liquid, the sludge in the reduction tower 4 is discharged into the third sludge discharge ditch 41 through the pipeline.

[0038] The steps of advanced oxidation of industrial wastewater using the present utility model are generally as follows:

[0039] Step 1: Transport the liquid to the ozone pressurized dissolved air device for treatment.

[0040] Step 2: Transport the liquid to the advanced oxidation tower 2 for treatment.

[0041] Step 3: Add hydrogen peroxide to the advanced oxidation tower 2, and use the first pH adjustment component to control the pH value of the advanced oxidation tower 2 within the range of 6.5 - 9.5.

[0042] Step 4: Transport the liquid to the advanced catalytic tower 3 for treatment, and use the second pH adjustment component to control the pH value of the advanced catalytic tower 3 within the range of 2.5 - 4.5.

[0043] Step 5: Transport the liquid to the reduction tower 4 for treatment.

[0044] With the above configuration, by setting up the ozone pressurized dissolved air device, more ozone can be dissolved in the same volume of liquid, thereby enabling a more effective oxidation reaction. Moreover, by controlling the pH value of the advanced oxidation tower 2 through the first pH adjustment component and controlling the pH value of the advanced catalytic tower 3 through the second pH adjustment component, the pH value is precisely controlled, thereby reducing the dosage consumption of hydrogen peroxide and effectively improving the utilization rate of hydrogen peroxide. The utility model has the characteristics of simple operation, small floor area, and low chemical consumption. The utility model carefully considers the chemical addition sequence and precisely controls the variables (such as pH value) in the catalytic oxidation reaction. Since the advanced oxidation tower 2 and the advanced catalytic tower 3 are used, there is no need for civil engineering such as water tanks, greatly shortening the construction period. The utility model has a wide range of applications. It can be used for wastewater treatment with large water quality fluctuations and restrictions on sludge discharge, can be used for the pretreatment of biologically refractory wastewater to improve the B / C ratio of the wastewater (the B / C ratio is the ratio of biochemical oxygen demand to chemical oxygen demand. This ratio is used to represent the biodegradability of the wastewater, that is, the degree to which the organic matter in the wastewater can be decomposed by microorganisms), can be used for the advanced treatment after wastewater biochemical treatment, can be used for the treatment of the concentrated water to meet the discharge standards in wastewater reuse, can be used for the treatment of toxic and harmful wastewater, and can be used for municipal sterilization and disinfection. The operating cost of the utility model is low. For example, the cost of treating one ton of wastewater with the utility model is approximately 0.18 - 0.48 yuan; the chemical cost of the utility model is low, the utilization rate of hydrogen peroxide is above 95%, and the chemical cost for reducing 50 COD in the wastewater is only 0.8 yuan / ton.

[0045] It should be noted that the references to "one embodiment", "embodiment", "specific embodiment", "some embodiments", etc. in the specification only indicate that the described embodiments may include specific features, structures, or characteristics. Moreover, such phrases do not necessarily refer to the same embodiment. In addition, when combining an embodiment to describe a specific feature, structure, or characteristic, whether explicitly described or not, achieving such a feature, structure, or characteristic in combination with other embodiments is within the knowledge scope of those skilled in the relevant art.

[0046] It should be noted that the various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the system disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0047] It should also be noted that although the present utility model has been disclosed above with preferred embodiments, the above embodiments are not intended to limit the present utility model. For any person skilled in the art, without departing from the scope of the technical solution of the present utility model, many possible changes and modifications can be made to the technical solution of the present utility model by using the technical content disclosed above, or it can be modified into equivalent embodiments with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still fall within the scope of protection of the technical solution of the present utility model.

[0048] It should also be understood that unless otherwise specified or indicated, the terms "first", "second", "third", etc. in the specification are only used to distinguish the various components, elements, steps, etc. in the specification, rather than to represent the logical relationship or sequential relationship, etc. between the various components, elements, steps.

[0049] In addition, it should also be recognized that the terms described herein are only used to describe specific embodiments and are not used to limit the scope of the present utility model. It must be noted that the singular forms "a" and "an" used herein and in the appended claims include plural referents unless the context clearly dictates otherwise. For example, a reference to "a step" or "a device" means a reference to one or more steps or devices and may include sub-steps and sub-devices. All conjunctions used should be understood in their broadest sense. Also, the word "or" should be understood to have the definition of a logical "or", rather than the definition of a logical "exclusive or", unless the context clearly dictates otherwise. In addition, the implementation of the methods and / or devices in the embodiments of the present utility model may include performing the selected tasks manually, automatically, or in combination.

Claims

1. An industrial wastewater advanced oxidation system, characterized in that: include: An ozone pressurized gas dissolving device, an advanced oxidation tower, an advanced catalytic tower, a reduction tower, a first pH adjusting component, a second pH adjusting component and a first three-phase separator, wherein the ozone pressurized gas dissolving device, the advanced oxidation tower, the advanced catalytic tower and the reduction tower are sequentially connected in series through pipelines, the first pH adjusting component is connected to the advanced oxidation tower, and the second pH adjusting component is connected to the advanced catalytic tower; The first three-phase separator is arranged in the advanced oxidation tower, and the advanced oxidation tower is provided with a hydrogen peroxide injection port; The first pH adjustment component is used to adjust the pH value of the advanced oxidation tower within a first preset range; The second pH adjustment component is used to adjust the pH value of the advanced catalytic tower within a second preset range, and the second preset range is smaller than the first preset range.

2. The industrial wastewater advanced oxidation system according to claim 1, characterized in that: The ozone pressurized gas dissolving device comprises a pressurized gas dissolving tank, an ozone generator and a water inlet component. The pressurized gas dissolving tank is connected to the ozone generator, the water inlet component and the advanced oxidation tower respectively.

3. The industrial wastewater advanced oxidation system according to claim 1, characterized in that: A second three-phase separator is provided in the advanced catalytic tower.

4. The industrial wastewater advanced oxidation system according to claim 1, characterized in that: A pipeline mixer is provided on the pipeline connecting the advanced oxidation tower and the advanced catalytic tower.

5. The industrial wastewater advanced oxidation system according to claim 1, characterized in that: The first pH adjustment component includes an alkali supplement device and a first pH meter. The alkali supplement device is connected to the advanced oxidation tower through an alkali supplement pipeline, and the first pH meter is connected to the advanced oxidation tower.

6. The industrial wastewater advanced oxidation system according to claim 1, characterized in that: The second pH adjustment component includes an acid-supplementing device and a second pH meter. The acid-supplementing device is connected to the advanced catalytic tower through an acid-supplementing pipeline, and the second pH meter is connected to the advanced catalytic tower.

7. The industrial wastewater advanced oxidation system according to claim 1, characterized in that: The reduction tower is an activated carbon reduction tower.

8. The industrial wastewater advanced oxidation system according to claim 1, characterized in that: The system further comprises an air outlet component, which comprises an induced draft fan and an air outlet pipeline. The induced draft fan is arranged on the air outlet pipeline, and the air outlet pipeline is respectively connected to the advanced oxidation tower, the advanced catalytic tower and the reduction tower.

9. The industrial wastewater advanced oxidation system according to claim 8, characterized in that: The system includes a waste gas treatment device, which includes an acid mist absorber and an ammonia water tank. The acid mist absorber is connected to the advanced oxidation tower and the advanced catalytic tower through the air outlet pipeline, and the ammonia water tank is connected to the reduction tower through the air outlet pipeline.

10. The industrial wastewater advanced oxidation system according to claim 1, characterized in that: The first preset range is 6.5-9.5, and the second preset range is 2.5-4.5.

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