Ultraviolet hydrogen peroxide fenton type sewage treatment device

Abstract

This application discloses a UV-hydrogen peroxide-based Fenton wastewater treatment device, comprising a CEM catalytic oxidation unit, a charge membrane separation unit, a material circulation unit, and a main control unit connected in sequence. Each unit forms a closed-loop treatment system through pipelines and valves. The CEM catalytic oxidation unit generates hydroxyl radicals to oxidize and degrade recalcitrant organic matter in wastewater; the charge membrane separation unit selectively separates organic matter from inorganic ions; the material circulation unit returns undegraded organic matter retained by the charge membrane to the CEM catalytic oxidation unit for secondary degradation; and the main control unit regulates the operating status of each unit to ensure system stability. This device, through closed-loop treatment logic, can efficiently degrade high-concentration recalcitrant organic wastewater generated by industries such as coking, coal chemical, and pharmaceutical, achieving stable COD compliance with effluent standards, without sludge or hazardous waste generation, and with low operating costs. It is suitable for wastewater upgrading and reclaimed water reuse scenarios.

Description

Technical Field

[0001] This utility model relates to the field of high-concentration, recalcitrant organic wastewater treatment technology, specifically to a Fenton wastewater treatment device based on ultraviolet hydrogen peroxide. Background Technology

[0002] High-concentration, recalcitrant organic wastewater generated by industries such as coking, coal chemical, and pharmaceutical manufacturing suffers from high COD, poor biodegradability, and high salinity, making it difficult to meet the requirements for upgraded discharge standards or reclaimed water reuse. Existing treatment technologies have significant drawbacks.

[0003] In existing processes, single oxidation (ozone, Fenton) either selectively oxidizes organic matter and is difficult to completely degrade (ozone), or produces hazardous sludge and requires strict pH control (Fenton); single or combined membrane processes (RO, NF) are easily polluted, have high energy consumption, and cannot degrade the retained organic matter, requiring additional treatment of membrane concentrate. With increasingly stringent environmental requirements (such as COD≤30mg / L), there is an urgent need for integrated wastewater treatment technology that can solve the problems of "incomplete degradation, secondary pollution, and high energy consumption". Summary of the Invention

[0004] This utility model aims to solve one of the technical problems existing in the prior art.

[0005] This application provides a UV hydrogen peroxide-based Fenton wastewater treatment device, comprising a CEM catalytic oxidation unit, a charge membrane separation unit, a material circulation unit, and a main control unit connected in sequence. Each CEM catalytic oxidation unit, charge membrane separation unit, and material circulation unit forms a closed-loop treatment system through pipelines and valves, used to achieve the degradation of organic matter in high-concentration, recalcitrant wastewater.

[0006] The CEM catalytic oxidation unit includes a main reaction tank, an ultraviolet light generating component, a hydrogen peroxide dosing component, a composite metal catalytic component, and a hydraulic cavitation component. The ultraviolet light generating component and the composite metal catalytic component are both fixed inside the main reaction tank. The hydraulic cavitation component is located at the water inlet of the main reaction tank. The hydrogen peroxide dosing component is used to add hydrogen peroxide into the main reaction tank. The main reaction tank is a sealed container made of oxidation-resistant material, used to contain wastewater, oxidant, and catalyst and to provide reaction space.

[0007] The ultraviolet light generating assembly is fixed inside the top of the main reaction vessel and includes at least two sets of ultraviolet lamps and lamp fixing brackets.

[0008] The hydrogen peroxide dosing assembly includes a hydrogen peroxide storage tank, a metering pump, and a dosing pipeline. One end of the dosing pipeline is connected to the hydrogen peroxide storage tank, and the other end extends into the main reaction tank and is located below the wastewater level.

[0009] The hydrogen peroxide dosing assembly also includes a hydrogen peroxide dilution tank, which is connected to the hydrogen peroxide storage tank and the metering pump via pipeline.

[0010] The composite metal catalytic assembly is fixed in the middle of the main reaction vessel and includes an inert support and a composite metal oxide catalyst supported on the surface of the support.

[0011] The composite metal oxide catalyst is an oxide of at least two metals selected from Fe, Mn, Cu, and Ti. The inert support is a honeycomb ceramic or modified activated carbon, which is used to fix the catalyst and ensure sufficient contact between the wastewater and the catalyst.

[0012] The hydraulic cavitation assembly is installed in the inlet pipe of the main reaction tank or at the bottom of the main reaction tank. It includes a cavitation generating element and a cavitation pump. The cavitation generating element is at least one of a venturi tube, an orifice plate, or a cyclone cavitation device.

[0013] The charge membrane separation unit includes a circulation pump, a flow regulating valve, and a circulation pipeline. One end of the circulation pipeline is connected to the concentrate outlet of the charge membrane separation unit, and the other end is connected to the inlet of the main reaction tank of the CEM catalytic oxidation unit. The circulation pump is used to transport the undegraded organic matter retained by the charge membrane back to the main reaction tank, and the flow regulating valve is used to control the circulation flow rate.

[0014] The main control unit includes a sensor group and a controller; the sensor group includes a temperature sensor and a pH sensor installed in the main reaction tank, and a COD detector installed on the product water side of the charge membrane separation unit. The controller is electrically connected to the ultraviolet light generation component, the hydrogen peroxide dosing component, the hydraulic cavitation component, the material circulation unit, and each sensor, and is used to adjust the operating status of each component according to the collected parameters.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. Thorough degradation, stable effect, and guaranteed compliance.

[0017] The hydraulic cavitation component breaks down large organic molecules and disperses suspended solids in the wastewater at the inlet, reducing the burden on subsequent treatment. Combined with UV-activated hydrogen peroxide and a composite metal catalytic component to generate hydroxyl radicals, non-selective oxidation is achieved. Undegraded organic matter undergoes secondary degradation through recirculation, resulting in a final effluent COD consistently <30 mg / L, meeting the requirements for upgraded discharge and reclaimed water reuse. Furthermore, the system allows for real-time adjustment of operating parameters, exhibits strong resistance to water quality and quantity fluctuations, and resolves the efficiency fluctuation issues of traditional processes.

[0018] 2. No secondary pollution, environmentally friendly and cost-effective.

[0019] The composite metal catalyst is immobilized on an inert support, preventing detachment and loss, and eliminating the need for replacement, thus avoiding the generation of hazardous waste from ozone catalysis. The degradation products are only small-molecule organic matter, H2O, and CO2, without the sludge produced by the Fenton process. Furthermore, ozone generation does not require liquid oxygen, avoiding safety hazards and exhaust gas poisoning, and saving the additional costs associated with hazardous waste and exhaust gas treatment.

[0020] 3. Low energy consumption and outstanding economic efficiency.

[0021] Hydrogen peroxide is precisely added after dilution, and recycling reduces waste; the charge membrane operates at low pressure (5-8 bar), consuming less energy than traditional high-pressure membranes; the integrated design of the device eliminates the need for additional contact tanks and liquid oxygen systems, resulting in a small footprint and significantly reduced infrastructure and operating costs.

[0022] 4. Highly adaptable, easy to operate and maintain, and widely applicable.

[0023] The inlet cavitation component is well-suited for wastewater with high suspended solids, such as landfill leachate and coking wastewater, reducing pollution from subsequent components. The core components are modular and easy to replace, and the system can be automatically monitored and operated, making operation and maintenance simple and covering the wastewater treatment needs of multiple industries such as coking, coal chemical, and pharmaceutical. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the ultraviolet hydrogen peroxide-based Fenton wastewater treatment device in the embodiments of this application.

[0025] Figure Labels

[0026] 1-Charge membrane separation unit, 11-Circulation pump, 12-Circulation pipeline, 2-Material circulation unit, 21-Recirculation pump, 22-Recirculation pipeline, 3-Main reaction tank, 4-Ultraviolet light generating component, 5-Hydrogen peroxide dosing component, 51-Hydrogen peroxide storage tank, 52-Metering pump, 53-Dosing pipeline, 54-Hydrogen peroxide dilution tank, 6-Composite metal catalyst component, 7-Hydraulic cavitation component, 71-Cavitation pump, 72-Cavitation generating element, 8-Temperature sensor, 9-pH sensor, 10-COD detector. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] The ultraviolet hydrogen peroxide-based Fenton wastewater treatment device provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0030] This application provides a UV hydrogen peroxide-based Fenton wastewater treatment device, including a CEM catalytic oxidation unit, a charge membrane separation unit 1, a material circulation unit 2, and a main control unit connected in sequence. Each CEM catalytic oxidation unit, charge membrane separation unit 1, and material circulation unit 2 form a closed-loop treatment system through pipelines and valves, which is used to achieve the degradation of organic matter in high-concentration, recalcitrant wastewater.

[0031] In this embodiment of the application,

[0032] like Figure 1 As shown, due to the aforementioned structure, relying on the hydroxyl radical (·HO) generated by the CEM catalytic oxidation unit as the core oxidant, the non-selective oxidation characteristics of ·HO degrade recalcitrant organic matter in wastewater. Simultaneously, combined with the "selective separation of organic matter and inorganic ions" function of the charge membrane separation unit 1, a closed loop of "degradation-separation-re-degradation" is constructed through the material circulation unit 2, avoiding the direct discharge of undegraded organic matter. The main control unit ensures the coordinated operation of all units, possessing the advantages of stable operation and strong resistance to water quality and quantity shocks. The corresponding operating logic is as follows: high-concentration recalcitrant wastewater first enters the CEM catalytic oxidation unit for preliminary degradation, then flows into the charge membrane separation unit 1 to separate organic matter from inorganic ions. The separated undegraded organic matter is returned to the CEM catalytic oxidation unit for further degradation through the material circulation unit 2, and the treated water is directly discharged or reused. The entire process requires no additional reagents that easily generate hazardous waste, solving the pain points of traditional processes such as "incomplete degradation and secondary pollution," and fully meeting the environmental protection requirements of "no sludge, no hazardous waste."

[0033] Example 2:

[0034] The difference from Example 1 is that, in this example, in addition to the structural features of the aforementioned examples, the CEM catalytic oxidation unit includes a main reaction tank 3, an ultraviolet light generating component 4, a hydrogen peroxide dosing component 5, a composite metal catalytic component 6, and a hydraulic cavitation component 7; the ultraviolet light generating component 4 and the composite metal catalytic component 6 are both fixed inside the main reaction tank 3, the hydraulic cavitation component 7 is located at the water inlet of the main reaction tank 3, and the hydrogen peroxide dosing component 5 is used to add hydrogen peroxide into the main reaction tank 3; the main reaction tank 3 is a sealed container made of oxidation-resistant material, used to contain wastewater, oxidant and catalyst and provide reaction space.

[0035] In this embodiment of the application, the ultraviolet light generating component 4 is fixed to the top of the main reaction vessel 3, and includes at least two sets of ultraviolet lamps and lamp fixing brackets.

[0036] like Figure 1 As shown, due to the above structure, the ultraviolet light emitted by the ultraviolet light generating component 4 can activate hydrogen peroxide, breaking the chemical bonds of hydrogen peroxide to generate hydroxyl radicals (•HO); the composite metal catalytic component 6 can reduce the activation energy of •HO generation, further increasing the free radical yield; the hydraulic cavitation component 7 is set at the water inlet, and through the cavitation effect (local high temperature and high pressure), it breaks down large molecular organic matter in the sewage in advance and disperses suspended solids, thus "reducing the burden" for subsequent catalytic oxidation; the oxidation-resistant sealed main reaction tank 3 avoids the escape of •HO and interference from external impurities, ensuring reaction efficiency. The corresponding operating logic is as follows: Wastewater first flows through the hydraulic cavitation component 7 at the inlet to complete pretreatment (breaking up large molecules and dispersing suspended solids), and then enters the oxidation-resistant and sealed main reaction tank 3; at this time, the hydrogen peroxide dosing component 5 adds hydrogen peroxide into the tank, the ultraviolet light generating component 4 is activated and activates the hydrogen peroxide to generate HO, and the composite metal catalytic component 6 accelerates the reaction of HO with organic matter; throughout the process, the components work synergistically in the main reaction tank 3, which greatly improves the degradation rate of organic matter, and at the same time solves the problem of "harsh reaction conditions and low degradation efficiency of large molecules" in the traditional ozone process.

[0037] Example 3:

[0038] The difference from Embodiment 2 is that, in this embodiment, in addition to including the structural features of the aforementioned embodiments, the hydrogen peroxide dosing component 5 includes a hydrogen peroxide storage tank 51, a metering pump 52, and a dosing pipeline 53. One end of the dosing pipeline 53 is connected to the hydrogen peroxide storage tank 51, and the other end extends into the main reaction tank 3 and is located below the sewage liquid level.

[0039] In this embodiment of the application, the hydrogen peroxide dosing component 5 also includes a hydrogen peroxide dilution tank 54, which is connected to the hydrogen peroxide storage tank 51 and the metering pump 52 via a pipeline.

[0040] like Figure 1As shown, due to the above-mentioned structure, the hydrogen peroxide dilution tank 54 can dilute high-concentration hydrogen peroxide to a low concentration, avoiding direct contact between high-concentration hydrogen peroxide and the composite metal catalyst, which would lead to catalyst activity attenuation; the metering pump 52 can accurately control the amount of hydrogen peroxide added, matching the changes in the concentration of organic matter in the wastewater (such as increasing the amount added when the COD of the influent increases); the dosing pipeline 53 extends below the liquid surface, allowing the hydrogen peroxide to be directly and fully mixed with the wastewater, avoiding premature activation of the hydrogen peroxide by ultraviolet light above the liquid surface and thus preventing waste, and ensuring that HO is evenly distributed in the wastewater. The corresponding operating logic is as follows: hydrogen peroxide flows from hydrogen peroxide storage tank 51 into hydrogen peroxide dilution tank 54 and is diluted to the target concentration. Then, it is delivered by metering pump 52 to dosing pipeline 53 at a set flow rate, and then injected into main reaction tank 3 through pipeline port below the liquid level. The injected hydrogen peroxide mixes rapidly with sewage and efficiently generates HO under the action of ultraviolet light and composite metal catalyst. This design reduces the ineffective consumption of hydrogen peroxide and ensures the degradation effect under different water qualities through precise dosing, avoiding the problems of "high cost due to excessive hydrogen peroxide dosing and incomplete degradation due to insufficient dosing" in traditional processes.

[0041] Example 4:

[0042] The difference from Example 2 is that, in this example, in addition to including the structural features of the aforementioned examples, the composite metal catalytic component 6 is fixed in the middle of the main reaction vessel 3, and includes an inert support and a composite metal oxide catalyst loaded on the surface of the support.

[0043] In this embodiment of the application, the composite metal oxide catalyst is an oxide of at least two metals selected from Fe, Mn, Cu, and Ti, and the inert support is a honeycomb ceramic or modified activated carbon, which is used to fix the catalyst and ensure that the wastewater is in full contact with the catalyst.

[0044] In this embodiment of the application, the hydraulic cavitation assembly 7 is installed in the water inlet pipe of the main reaction tank 3 or at the bottom of the main reaction tank 3, and includes a cavitation generating element 72 and a cavitation pump 71. The cavitation generating element 72 is at least one of a venturi tube, an orifice plate or a cyclone cavitation device.

[0045] like Figure 1As shown, due to the above-mentioned structure, the composite metal oxide catalyst (Fe / Mn / Cu / Ti oxide) enhances the generation and utilization of H₂O through synergistic effect, and is loaded on honeycomb ceramic / modified activated carbon (inert support), which can prevent catalyst detachment and loss; the high specific surface area of ​​honeycomb ceramic / modified activated carbon can ensure sufficient contact between wastewater and catalyst, and improve catalytic efficiency; the two installation positions of the hydraulic cavitation component 7 are suitable for different water qualities - the inlet pipe installation is suitable for wastewater with high suspended solids, and the installation inside the main reaction tank 3 is suitable for clean wastewater (cavitation and catalysis are carried out simultaneously to improve reaction efficiency). The cavitation generating element 72 (Venturi tube, etc.) enhances the mixing of wastewater with reagents and catalyst by generating cavitation effect. The corresponding operating logic is as follows: If the sewage has a high level of suspended solids, the hydraulic cavitation component 7 is installed in the inlet pipe, and the sewage first undergoes cavitation to break up the suspended solids before contacting the composite metal catalyst component 6; if the sewage is clean, the hydraulic cavitation component 7 is installed at the bottom of the tank, acting synchronously with ultraviolet light and the catalyst; the composite metal catalyst is fixed in the middle of the tank by a carrier, and the sewage comes into full contact with the catalyst when it flows through, rapidly degrading organic matter under the action of HO; this design not only solves the problems of "catalyst easy loss and insufficient contact with sewage" in traditional catalytic processes, but also adapts to different sewage through flexible selection of cavitation installation position, and has strong resistance to water quality and quantity shocks.

[0046] Example 5:

[0047] The difference from Embodiment 1 is that, in this embodiment, in addition to the structural features of the aforementioned embodiments, the charge membrane separation unit 1 includes a circulation pump 11, a flow regulating valve, and a circulation pipeline 12; one end of the circulation pipeline 12 is connected to the concentrate outlet of the charge membrane separation unit 1, and the other end is connected to the inlet of the main reaction tank 3 of the CEM catalytic oxidation unit; the circulation pump 11 is used to transport the undegraded organic matter retained by the charge membrane back to the main reaction tank 3; and the flow regulating valve is used to control the circulation flow rate.

[0048] In this embodiment of the application, the material circulation unit 2 includes a reflux circulation pump 21, a flow regulating valve, and a reflux pipeline 22; one end of the reflux pipeline 22 is connected to the concentrate outlet of the charge membrane separation unit 1, and the other end is connected to the inlet of the main reaction tank 3 of the CEM catalytic oxidation unit; the reflux circulation pump 21 is used to transport the undegraded organic matter retained by the charge membrane back to the main reaction tank 3; and the flow regulating valve is used to control the circulation flow rate.

[0049] like Figure 1As shown, due to the above structure, the undegraded organic matter (molecular state) retained on the concentrate side of the charge membrane is still degradable. It is returned to the main reaction tank 3 through the circulation pipeline 12, where it can come into contact with HO again and be degraded. The circulation pump 11 provides the reflux power, and the flow regulating valve adjusts the circulation flow according to the concentration of organic matter on the concentrate side (such as COD value) to avoid excessive reflux leading to excessive load in the tank. The corresponding operating logic is as follows: After being catalytically oxidized by CEM, the wastewater enters the charge membrane separation unit 1. Inorganic ions penetrate the membrane and enter the product water side, while undegraded organic matter is retained on the concentrate side. Under the action of the circulation pump 11, the organic matter on the concentrate side flows back to the inlet of the main reaction tank 3 through the circulation pipeline 12, mixes with the newly entered wastewater, and participates in the catalytic oxidation reaction again. When the concentration of organic matter on the concentrate side drops to the target value (e.g., COD < 50 mg / L), the circulation flow is reduced or the circulation is stopped through the flow regulating valve. This closed-loop design ensures the "full degradation" of organic matter, solves the problem of "direct discharge of undegraded organic matter leading to excessive COD" in traditional processes, and completely decomposes most of the organic matter.

[0050] Example 6:

[0051] The difference from Embodiment 1 is that, in this embodiment, in addition to including the structural features of the aforementioned embodiments, the main control unit includes a sensor group and a controller; the sensor group includes a temperature sensor 8 and a pH sensor 9 installed on the main reaction tank 3, a COD detector 10 installed on the charge membrane permeate side, and the controller is electrically connected to the ultraviolet light generating component 4, the hydrogen peroxide metering pump 52, the cavitation pump 71, the circulation pump 11 and each sensor, and is used to adjust the operating status of each component according to the collected parameters.

[0052] like Figure 1As shown, due to the above structure, temperature sensor 8 and pH sensor 9 monitor the reaction conditions in the main reaction tank 3 in real time, and COD detector 10 monitors the quality of the produced water in real time (ensuring compliance with standards). The controller automatically adjusts the operating parameters of each component by receiving sensor data—such as reducing the ultraviolet light power when the temperature is too high, triggering acid-base adjustment (implicit auxiliary function, in line with process logic) when the pH deviates from the appropriate range (such as pH < 2 or > 11), and increasing the amount of hydrogen peroxide added or the flow rate of circulation pump 11 when the COD of the produced water exceeds the standard, to ensure that the system always operates stably. The corresponding operating logic is as follows: After the system starts, the sensor group continuously collects the temperature, pH, and COD value of the main reaction tank 3 and the product water side of the charge membrane, and transmits the data to the controller; if the temperature exceeds 45℃, the controller automatically reduces the power of the ultraviolet lamp; if the pH < 2, the controller triggers the addition of alkali solution (auxiliary function); if the product water COD > 30mg / L, the controller increases the dosage of hydrogen peroxide metering pump 52 or increases the flow rate of circulation pump 11 to ensure that undegraded organic matter is fully recycled for degradation; this design realizes the automated control of the system, reduces manual intervention, and has the advantages of simple debugging and stable operation, while solving the problem of traditional processes "relying on manual adjustment and easily causing a decline in treatment effect due to parameter fluctuations".

[0053] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0054] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An ultraviolet Fenton-like hydrogen peroxide sewage treatment device, characterized in that, It includes a CEM catalytic oxidation unit, a charge membrane separation unit, a material circulation unit, and a main control unit connected in sequence. The CEM catalytic oxidation unit, the charge membrane separation unit, the material circulation unit, and the main control unit form a closed-loop treatment system through pipelines and valves to achieve the degradation of organic matter in high-concentration, recalcitrant wastewater.

2. The ultraviolet hydrogen peroxide-based Fenton wastewater treatment device according to claim 1, characterized in that, The CEM catalytic oxidation unit includes a main reaction tank, an ultraviolet light generating component, a hydrogen peroxide dosing component, a composite metal catalytic component, and a hydraulic cavitation component. The ultraviolet light generating component and the composite metal catalytic component are both fixed inside the main reaction tank. The hydraulic cavitation component is located at the water inlet of the main reaction tank. The hydrogen peroxide dosing component is used to add hydrogen peroxide into the main reaction tank. The main reaction tank is a sealed container made of oxidation-resistant material, used to contain wastewater, oxidant, and catalyst and to provide reaction space.

3. The ultraviolet hydrogen peroxide-based Fenton wastewater treatment device according to claim 2, characterized in that, The ultraviolet light generating assembly is fixed inside the top of the main reaction vessel and includes at least two sets of ultraviolet lamps and lamp fixing brackets.

4. The ultraviolet hydrogen peroxide-based Fenton wastewater treatment device according to claim 2, characterized in that, The hydrogen peroxide dosing assembly includes a hydrogen peroxide storage tank, a metering pump, and a dosing pipeline. One end of the dosing pipeline is connected to the hydrogen peroxide storage tank, and the other end extends into the main reaction tank and is located below the sewage level.

5. The ultraviolet hydrogen peroxide-based Fenton wastewater treatment device according to claim 4, characterized in that, The hydrogen peroxide dosing assembly also includes a hydrogen peroxide dilution tank, which is connected to a hydrogen peroxide storage tank and a metering pump via a pipeline.

6. The ultraviolet hydrogen peroxide-based Fenton wastewater treatment device according to claim 2, characterized in that, The composite metal catalytic assembly is fixed in the middle of the main reaction vessel and includes an inert support and a composite metal oxide catalyst supported on the surface of the support.

7. The ultraviolet hydrogen peroxide-based Fenton wastewater treatment device according to claim 6, characterized in that, The inert carrier is a honeycomb ceramic or modified activated carbon, used to fix the catalyst and ensure that the wastewater and the catalyst are in full contact.

8. A UV-Hydrogen Peroxide-Based Fenton Wastewater Treatment Device according to claim 6, characterized in that, The hydraulic cavitation assembly is installed in the inlet pipe of the main reaction tank or at the bottom of the main reaction tank, and includes a cavitation generating element and a cavitation pump. The cavitation generating element is at least one of a venturi tube, an orifice plate, or a cyclone cavitation device.

9. A Fenton-type wastewater treatment device using ultraviolet hydrogen peroxide according to claim 1, characterized in that, The charge membrane separation unit includes a circulation pump, a flow regulating valve, and a circulation pipeline. One end of the circulation pipeline is connected to the concentrate outlet of the charge membrane separation unit, and the other end is connected to the inlet of the main reaction tank of the CEM catalytic oxidation unit. The circulation pump is used to transport the undegraded organic matter retained by the charge membrane back to the main reaction tank, and the flow regulating valve is used to control the circulation flow rate.

10. A Fenton-type wastewater treatment device using ultraviolet hydrogen peroxide according to claim 2, characterized in that, The main control unit includes a sensor group and a controller; the sensor group includes a temperature sensor and a pH sensor installed in the main reaction tank, and a COD detector installed on the product water side of the charge membrane separation unit; the controller is electrically connected to the ultraviolet light generation component, the hydrogen peroxide dosing component, the hydraulic cavitation component, the material circulation unit, and each sensor, and is used to adjust the operating status of each component according to the collected parameters.

Images