Catalytic ozonation system

Abstract

The invention discloses an ozone catalytic oxidation system, and belongs to the field of ozone catalysis, the ozone catalytic oxidation system comprises a base, the top of the base is provided with an oxygen injection station and an ozone generator, the oxygen injection station and the ozone generator are in through connection through a connecting pipe, and one end, away from the oxygen injection station, of the ozone generator is in through connection with a connecting piece; the connecting piece is linearly connected with a plurality of efficient gas dissolving devices in a penetrating mode at equal intervals, one side of the ozone strengthening efficient oxidation pond is connected with a standard discharge pipe in a penetrating mode, and the end, away from the standard discharge pipe, of the ozone strengthening efficient oxidation pond is connected with a front-end process butt joint pipe in a penetrating mode; aiming at the problem that organic toxic substance residues exist in traditional harmless treatment equipment for organic wastewater by using ozone, the system adopts an ozone catalysis advanced oxidation efficient heterogeneous catalysis technology, and the degree of oxidizing toxic substances in the organic wastewater by ozone can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ozone catalysis, and particularly relates to an ozone catalytic oxidation system. Background Art

[0002] Catalytic oxidation technology is a green chemical process that accelerates the oxidation reaction process by introducing catalysts. Its core lies in reducing the reaction activation energy and improving the reaction selectivity and efficiency. It is widely used in environmental governance, energy conversion and chemical synthesis. Catalytic oxidation reactions are often used in sewage treatment systems. By using catalysts to enhance the decomposition of ozone, the chemical reaction between pollutants and oxidants in the wastewater is accelerated, thereby removing pollutants in the water.

[0003] Chinese patent publication number CN119930025B discloses an ozone catalytic oxidation system for detoxifying the discharge of toxic substances in organic wastewater. However, the disclosed solution has the following shortcomings: in actual use, the solution uses direct contact between ozone and organic wastewater for peroxidation detoxification treatment. During the actual oxidation process, some toxic organic matter cannot be completely oxidized, which easily leads to the residue of toxic substances. Summary of the Invention

[0004] The object of the present invention is to provide an ozone catalytic oxidation system to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an ozone catalytic oxidation system, comprising a base, an oxygen injection station and an ozone generator are provided on the top of the base, the oxygen injection station and the ozone generator are connected through a connecting pipe, the end of the ozone generator away from the oxygen injection station is connected through a connecting piece, the connecting piece is linearly connected with a number of high-efficiency gas dissolving devices at equal intervals, an ozone-enhanced high-efficiency oxidation tank is fixedly connected to the top of the base, the end of the high-efficiency gas dissolving device away from the connecting piece passes through the top of the ozone-enhanced high-efficiency oxidation tank and extends into the bottom of the ozone-enhanced high-efficiency oxidation tank, a homogeneous enhancement reactor and a secondary mixing device are provided in the ozone-enhanced high-efficiency oxidation tank, a standard discharge pipe is connected through one side of the ozone-enhanced high-efficiency oxidation tank, a front-end process docking pipe is connected through one end of the ozone-enhanced high-efficiency oxidation tank away from the standard discharge pipe, and a tail gas destroyer is provided through the top of the ozone-enhanced high-efficiency oxidation tank; Also included is a method for using the above system, comprising the following steps: S1 homogeneous catalytic pretreatment step, which includes wastewater introduction and reactor preparation, micro-electrolysis ion dosing control, and catalytic ion action mechanism. Precise dosing of trace metal ions through the homogeneous catalytic reactor provides a catalytic basis for subsequent oxidation reactions. S2 ozone efficient dissolution and mixing step, which includes circulating water extraction and ozone addition, electromagnetic shear field effect to enhance dissolution, and secondary mixing to achieve uniform contact, which is used to improve ozone dissolution efficiency and ensure uniform gas-liquid contact through mixing equipment; S3 heterogeneous catalytic oxidation step, which includes a catalyst bed contact step, a hydroxyl radical generation and oxidation step, and a pollutant deep degradation step. A fixed catalyst bed is used to stimulate hydroxyl radicals to completely mineralize the pollutants. S4 is a staged, repeated treatment process that includes the first raw water treatment stage, the second effluent enhancement stage, and the third final oxidation and process integration stage. Multiple stages of ozone and catalysis are used to ensure full degradation of pollutants. S5 discharge and resource utilization step, which includes water quality compliance verification and discharge link, sludge thermal hydrolysis and filtrate treatment link and comprehensive environmental and economic benefits link, is used to treat water to meet discharge standards and realize sludge resource utilization.

[0006] As a preferred embodiment, a one-way air inlet valve is provided on the top of the oxygen injection station, seals are provided at the through connections at both ends of the connecting pipe, a sealing cover is provided on the top of the ozone enhanced high-efficiency oxidation tank, the sealing cover is through-connected to the exhaust gas destroyer, and the standard emission pipe and the front-end process docking pipe are both provided with docking rings.

[0007] As a preferred embodiment, the S1 homogeneous catalytic pretreatment step, in which the sewage is introduced and the reactor preparation link includes allowing the sewage to enter the ozone catalytic advanced oxidation tank and then flow directly through the homogeneous catalytic reactor. The reactor is equipped with customized plates, and the plate material can be selected according to different water qualities; the S1 homogeneous catalytic pretreatment step, in which the micro-electrolysis ion addition control link includes releasing catalytic metal ions such as iron or copper ions into the sewage through micro-electrolysis technology, and adjusting the current to control the addition amount to the micro-dose level. The current acts on the plate to accurately release ions, which serve as a homogeneous catalyst and subsequently synergize with ozone to excite hydroxyl radicals.

[0008] As a preferred embodiment, the S1 homogeneous catalytic pretreatment step, in which the catalytic ion action mechanism includes the initial combination of released metal ions with organic matter in the sewage, enhancing the activity of subsequent ozone reaction, and the ions act as catalysts to reduce the ozone decomposition energy barrier and activate pollutant molecules in advance. The addition ratio is dynamically optimized by current and is suitable for industrial wastewater.

[0009] As a preferred embodiment, the S2 ozone efficient dissolving and mixing step, in which the circulating water extraction and ozone addition links include extracting 20-30% of the raw water for circulation, injecting ozone gas through a high-efficiency ozone dissolving device, and partially reducing the total ozone demand. The dissolving device integrates an electromagnetic shear field module; the S2 ozone efficient dissolving and mixing step, in which the electromagnetic shear field effect to enhance the dissolution link includes the electromagnetic module applying an electromagnetic shear field, changing the water molecule cluster structure and the pollutant ion atmosphere, destroying the gas-liquid interfacial tension, and the shear field improves the dispersion and solubility of ozone molecules in sewage through physical action.

[0010] As a preferred embodiment, the S2 ozone efficient dissolution and mixing step, in which the secondary mixing to achieve uniform contact includes fully stirring the ozone-containing circulating water and the raw sewage through the secondary mixing equipment at the bottom of the pool, and the mixing equipment completes efficient mass transfer in a limited space to ensure uniform distribution of ozone; the S3 heterogeneous catalytic oxidation step, in which the catalyst bed contact link includes the mixed sewage flowing through a filled reactor and contacting a heterogeneous catalyst, the catalyst is fixedly filled, and the surface provides active sites to adsorb and enrich pollutants; the S3 heterogeneous catalytic oxidation step, in which the hydroxyl radical generation and oxidation link includes the decomposition of ozone to produce hydroxyl radicals under the coordination of the unbalanced potential difference on the catalyst surface and metal ions, and the hydroxyl radical redox potential non-selectively breaks the organic chain to form short chains or mineralizes into carbon dioxide and water.

[0011] As a preferred embodiment, the S3 heterogeneous catalytic oxidation step, in which the deep degradation of pollutants includes the complete degradation of difficult-to-degrade organic matter to ensure the water quality of the effluent; the S4 segmented repeated treatment step, in which the first raw water treatment step includes the first treatment of the raw water, the initial reduction of the chemical oxygen demand in the effluent, the recycling of part of the raw water, and the priority treatment of high-concentration pollutants; the S4 segmented repeated treatment step, in which the second effluent enhancement step includes recycling part of the effluent from the first section, repeating the efficient dissolved air and heterogeneous catalytic process, and oxidizing the residual difficult-to-degrade substances step by step to optimize the reaction depth.

[0012] As a preferred embodiment, the S4 segmented repeated treatment steps, in which the third stage final oxidation and process integration link includes taking part of the effluent from the second stage for final treatment to ensure that it enters the discharge link after meeting the standards. The three-stage design covers all pollutant concentration gradients and reduces the total amount of ozone by taking the effluent from the previous stage.

[0013] As a preferred embodiment, the S5 discharge and resource utilization step, in which the water quality compliance verification and discharge links include the final effluent chemical oxygen demand detection ≤30mg / L, direct discharge or reuse, complete mineralization of organic matter, ozone serving as a disinfectant to kill pathogens, no chemical sludge generation, and avoidance of secondary pollution.

[0014] As a preferred embodiment, the S5 discharge and resource utilization step, in which the sludge thermal hydrolysis and filtrate treatment links include a supporting sludge thermal hydrolysis system, which treats the dehydrated filtrate and returns it to the treatment process, decomposes the organic matter by thermal hydrolysis, and reuses the filtrate as a resource to form a closed loop; the S5 discharge and resource utilization step, in which the comprehensive environmental and economic benefits include the fact that the technology only requires oxygen and electricity for operation, no additional reagents are consumed, the mineralization process generates carbon dioxide and water, and no residual harmful substances.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the existing technology, the traditional dissolved gas efficiency is 50%-60%, resulting in weak trace pollutant removal ability. This system uses an electromagnetic shear field to make the ozone dissolved gas efficiency ≥95%, thereby improving the thorough oxidation effect of organic toxic substances in organic wastewater and reducing the residual organic toxic substances.

[0016] In the existing technology, homogeneous catalysis or non-catalysis is used. The homogeneous catalysis method uses micro-electrolysis to accurately add metal ions, without adding any reagents, and the electricity consumption per ton of water is <0.01 kWh. This system uses a combination of heterogeneous catalysis and homogeneous catalysis: the heterogeneous catalysis method uses rare earth modified activated carbon catalyst, the catalyst life is >10 years, the specific surface area is large, and it specializes in the removal of trace pollutants, effectively reducing the residual organic and toxic substances in the wastewater.

[0017] Electromagnetic shear field technology: By changing the structure of water molecule clusters, the ozone dissolution efficiency is increased from the traditional 50%-60% to more than 95%.

[0018] Digital modeling optimization: Gas-liquid two-phase dynamic mixing simulation enables process iteration and reduces ozone consumption by 30%.

[0019] Core closed loop: homogeneous catalysis (precise ion dosing) → ozone dissolution (electromagnetic efficiency improvement of 95%) → heterogeneous oxidation (rare earth catalyst) → segmented intensification → resource-based emission.

[0020] Promotion prospects: Covering ten major industries, with significant emission reduction benefits, all links are strictly based on documents to ensure technical operability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the structure of the present invention; Figure 2 It is a rear view of the structure of the present invention; Figure 3 Flowchart of the present invention.

[0022] In the figure: 1. Base; 2. Oxygen injection station; 3. Ozone generator; 4. Connectors; 5. High-efficiency dissolved air device; 6. Ozone-enhanced high-efficiency oxidation tank; 7. Tail gas destroyer; 8. Standard emission pipe; 9. Front-end process connecting pipe. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the embodiments.

[0024] The following examples are intended to illustrate the present invention but are not intended to limit the scope of protection of the present invention. The conditions in the examples may be further adjusted according to specific conditions. Simple improvements to the method of the present invention within the scope of the present invention are also within the scope of protection claimed in the present invention.

[0025] See also Figure 1 and Figure 2 The present invention provides an ozone catalytic oxidation system, including a base 1, an oxygen injection station 2 and an ozone generator 3 are provided on the top of the base 1, the oxygen injection station 2 and the ozone generator 3 are connected through a connecting pipe, the end of the ozone generator 3 away from the oxygen injection station 2 is connected through a connector 4, the connector 4 is linearly connected with a number of high-efficiency gas dissolving devices 5 at equal intervals, an ozone enhanced high-efficiency oxidation tank 6 is fixedly connected to the top of the base 1, the end of the high-efficiency gas dissolving device 5 away from the connector 4 passes through the top of the ozone enhanced high-efficiency oxidation tank 6 and extends into the bottom of the ozone enhanced high-efficiency oxidation tank 6, and the ozone enhanced high-efficiency oxidation tank 6 is connected to the ozone enhanced high-efficiency oxidation tank 6. A homogeneous enhanced reactor and a secondary mixing device are provided in the pool 6. A standard discharge pipe 8 is connected to one side of the ozone enhanced high-efficiency oxidation pool 6. A front-end process docking pipe 9 is connected to the end of the ozone enhanced high-efficiency oxidation pool 6 away from the standard discharge pipe 8. A tail gas destroyer 7 is provided on the top of the ozone enhanced high-efficiency oxidation pool 6. A one-way air inlet valve is provided on the top of the oxygen injection station 2. Seals are provided at the through-connections at both ends of the connecting pipe. A sealing cover is provided on the top of the ozone enhanced high-efficiency oxidation pool 6. The sealing cover is connected to the tail gas destroyer 7. The standard discharge pipe 8 and the front-end process docking pipe 9 are both provided with docking rings.

[0026] See also Figure 3 , also includes a method for using the above system, comprising the following steps: S1 homogeneous catalytic pretreatment step, which includes wastewater introduction and reactor preparation, micro-electrolysis ion dosing control, and catalytic ion action mechanism. Precise dosing of trace metal ions through the homogeneous catalytic reactor provides a catalytic basis for subsequent oxidation reactions. S2 ozone efficient dissolution and mixing step, which includes circulating water extraction and ozone addition, electromagnetic shear field effect to enhance dissolution, and secondary mixing to achieve uniform contact, which is used to improve ozone dissolution efficiency and ensure uniform gas-liquid contact through mixing equipment; S3 heterogeneous catalytic oxidation step, which includes a catalyst bed contact step, a hydroxyl radical generation and oxidation step, and a pollutant deep degradation step. A fixed catalyst bed is used to stimulate hydroxyl radicals to completely mineralize the pollutants. S4 is a staged, repeated treatment process that includes the first raw water treatment stage, the second effluent enhancement stage, and the third final oxidation and process integration stage. Multiple stages of ozone and catalysis are used to ensure full degradation of pollutants. S5 discharge and resource utilization step, which includes water quality compliance verification and discharge link, sludge thermal hydrolysis and filtrate treatment link and comprehensive environmental and economic benefits link, is used to treat water to meet discharge standards and realize sludge resource utilization.

[0027] In this embodiment: 1. Technical closed loop: efficient collaborative processing chain 1. Closed loop of core processes Homogeneous catalytic start-up: Through micro-electrolysis technology, trace metal ions are precisely added to activate pollutant molecules, laying the foundation for oxidation reactions.

[0028] Electromagnetic gas dissolution enhancement: The electromagnetic shear field (EM) breaks the gas-liquid interfacial tension, increasing the ozone dissolution efficiency from the traditional 50-60% to over 95%, reducing ozone waste by 30%.

[0029] Heterogeneous deep oxidation: Rare earth modified catalysts (large specific surface area, life span > 10 years) produce hydroxyl radicals and indiscriminately mineralize organic matter into CO2 and H2O.

[0030] Staged treatment guarantee: three-stage dosing design (taking the effluent from the front stage for recycling) degrades difficult pollutants step by step to ensure that the effluent is stable and meets the standards.

[0031] Closed-loop resource utilization: The supporting sludge thermal hydrolysis system treats the dehydrated filtrate without secondary pollution, realizing the coordinated resource utilization of "water-sludge".

[0032] 2. Industry promotion potential Applicability: Covers ten major industries including medical and pharmaceutical, electronic manufacturing, and petrochemicals.

[0033] Emission reduction prospects: In the next three years, it is expected that 3 billion tons of wastewater will be treated annually and 58,400 tons of COD emissions will be reduced annually.

[0034] See also Figure 1 and Figure 2, S1 homogeneous catalytic pretreatment step, in which the sewage introduction and reactor preparation steps include allowing the sewage to enter the ozone catalytic advanced oxidation tank and then flow directly through the homogeneous catalytic reactor. The reactor is equipped with customized plates, and the plate material can be selected according to different water qualities; S1 homogeneous catalytic pretreatment step, in which the micro-electrolysis ion addition control step includes releasing catalytic metal ions such as iron or copper ions into the sewage through micro-electrolysis technology, and adjusting the current to control the addition amount to the micro-dose level. The current acts on the plate to accurately release ions as a homogeneous catalyst, and subsequently synergizes with ozone to excite hydroxyl radicals.

[0035] S1 is a homogeneous catalytic pretreatment step. The catalytic ion action mechanism in this step includes the initial combination of released metal ions with organic matter in the sewage, which enhances the activity of subsequent ozone reactions. The ions act as catalysts to reduce the energy barrier of ozone decomposition and activate pollutant molecules in advance. The dosage ratio is dynamically optimized through current and is suitable for industrial wastewater.

[0036] S2 ozone efficient dissolution and mixing step, in which the circulating water extraction and ozone addition links include extracting 20-30% of the raw water for circulation, injecting ozone gas through a high-efficiency ozone dissolution device, and the partial water circulation design reduces the total demand for ozone. The dissolution device integrates an electromagnetic shear field module; S2 ozone efficient dissolution and mixing step, in which the electromagnetic shear field effect to enhance the dissolution link includes the electromagnetic module applying an electromagnetic shear field, changing the water molecule cluster structure and the pollutant ion atmosphere, destroying the gas-liquid interfacial tension, and the shear field improves the dispersion and solubility of ozone molecules in sewage through physical action.

[0037] S2 ozone efficient dissolution and mixing step, in which the secondary mixing to achieve uniform contact includes fully stirring the ozone-containing circulating water and the original sewage through the secondary mixing equipment at the bottom of the pool, and the mixing equipment completes efficient mass transfer in a limited space to ensure uniform distribution of ozone; S3 heterogeneous catalytic oxidation step, in which the catalyst bed contact step includes the mixed sewage flowing through a filled reactor and contacting a heterogeneous catalyst, the catalyst is fixed and filled, and the surface provides active sites to adsorb and enrich pollutants; S3 heterogeneous catalytic oxidation step, in which the hydroxyl radical generation and oxidation step includes the decomposition of ozone to produce hydroxyl radicals under the coordination of the unbalanced potential difference on the catalyst surface and metal ions, and the hydroxyl radical redox potential non-selectively breaks the organic chain to form short chains or mineralizes into carbon dioxide and water.

[0038] S3 is a heterogeneous catalytic oxidation step, in which the deep degradation of pollutants includes the complete degradation of refractory organic matter to ensure the effluent quality; S4 is a segmented repeated treatment step, in which the first raw water treatment step includes the initial treatment of the raw water, the initial reduction of the chemical oxygen demand in the effluent, and the recycling of part of the raw water to give priority to the treatment of high-concentration pollutants; S4 is a segmented repeated treatment step, in which the second effluent enhancement step includes recycling part of the effluent from the first step, repeating the efficient dissolved air and heterogeneous catalytic process, and oxidizing the residual refractory substances step by step to optimize the reaction depth.

[0039] S4 repeats the treatment steps in sections. The third stage of final oxidation and process integration in this step includes taking part of the effluent from the second stage for final treatment to ensure that it enters the discharge stage after meeting the standards. The three-stage design covers all pollutant concentration gradients and reduces the total amount of ozone by taking the effluent from the previous stage.

[0040] S5 discharge and resource utilization step, in which the water quality verification and discharge links include the final effluent chemical oxygen demand detection ≤30mg / L, direct discharge or reuse, complete mineralization of organic matter, ozone serving as a disinfectant to kill pathogens, no chemical sludge generation, and avoidance of secondary pollution.

[0041] The S5 emission and resource utilization step includes the sludge thermal hydrolysis and filtrate treatment process, which includes a supporting sludge thermal hydrolysis system, which treats the dehydrated filtrate and returns it to the treatment process. The thermal hydrolysis decomposes the organic matter, and the filtrate is recycled and reused to form a closed loop. The S5 emission and resource utilization step includes the comprehensive environmental and economic benefits, including the fact that the technology only requires oxygen and electricity for operation, no additional chemical consumption, and the mineralization process generates carbon dioxide and water, with no residual harmful substances.

[0042] In this embodiment: This technology achieves four-dimensional innovation through "electromagnetic dissolved gas efficiency improvement → two-phase catalytic synergy → segmented enhancement → resource closed loop": Highest efficiency: ozone dissolved gas 95%+, electricity consumption per ton of water <0.01 degrees, the industry's limit level; Economic sustainability: Investment and operating costs reduced by 50%, with a benchmark case of RMB 0.18 per ton of water; Environmental friendliness: COD emissions have been reduced by 65,700 tons in the past three years, with no sludge or chemical pollution; Industry-changing value: Breaking through the bottleneck of trace pollutant removal and providing upgrade solutions for 4,119 sewage treatment plants across the country.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and alterations may be made to these embodiments without departing from the principles of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ozone catalytic oxidation system comprising a base (1), characterized in that: An oxygen injection station (2) and an ozone generator (3) are provided on the top of the base (1). The oxygen injection station (2) and the ozone generator (3) are connected through a connecting pipe. The end of the ozone generator (3) away from the oxygen injection station (2) is connected through a connecting piece (4). The connecting piece (4) is linearly connected to a plurality of high-efficiency gas dissolving devices (5) at equal intervals. An ozone-enhanced high-efficiency oxidation tank (6) is fixedly connected to the top of the base (1). The high-efficiency gas dissolving device (5) is connected to the end away from the connecting piece (4). The end penetrates the top of the ozone enhanced high-efficiency oxidation tank (6) and extends into the bottom of the inside of the ozone enhanced high-efficiency oxidation tank (6), wherein a homogeneous enhanced reactor and a secondary mixing device are provided in the ozone enhanced high-efficiency oxidation tank (6), a standard discharge pipe (8) is penetrated and connected to one side of the ozone enhanced high-efficiency oxidation tank (6), an end of the ozone enhanced high-efficiency oxidation tank (6) away from the standard discharge pipe (8) is penetrated and connected to a front-end process butt pipe (9), and an exhaust gas destroyer (7) is penetrated and provided on the top of the ozone enhanced high-efficiency oxidation tank (6); Also included is a method for using the above system, comprising the following steps: S1 homogeneous catalytic pretreatment step, which includes the introduction of sewage and reactor preparation, micro-electrolysis ion addition control, and catalytic ion action mechanism. Trace metal ions are accurately added through the homogeneous catalytic reactor to provide a catalytic basis for subsequent oxidation reactions; S2 ozone efficient dissolution and mixing step, which includes circulating water extraction and ozone addition, electromagnetic shear field effect to enhance dissolution, and secondary mixing to achieve uniform contact, which is used to improve ozone dissolution efficiency and ensure uniform gas-liquid contact through mixing equipment; S3 heterogeneous catalytic oxidation step, which includes a catalyst bed contact step, a hydroxyl radical generation and oxidation step, and a pollutant deep degradation step. A fixed catalyst bed is used to stimulate hydroxyl radicals to completely mineralize the pollutants. S4 is a staged, repeated treatment process that includes the first raw water treatment stage, the second effluent enhancement stage, and the third final oxidation and process integration stage. Multiple stages of ozone and catalysis are used to ensure full degradation of pollutants. S5 discharge and resource utilization step, which includes water quality compliance verification and discharge link, sludge thermal hydrolysis and filtrate treatment link and comprehensive environmental and economic benefits link, is used to treat water to meet discharge standards and realize sludge resource utilization.

2. The ozone catalytic oxidation system according to claim 1, characterized in that: A one-way air inlet valve is provided on the top of the oxygen injection station (2), seals are provided at the through-connections at both ends of the connecting pipe, a sealing cover is provided on the top of the ozone enhanced high-efficiency oxidation tank (6), the sealing cover is through-connected to the tail gas destroyer (7), and the standard discharge pipe (8) and the front-end process butt pipe (9) are both provided with docking rings.

3. The ozone catalytic oxidation system according to claim 1, characterized in that: The S1 homogeneous catalytic pretreatment step, in which the sewage is introduced and the reactor preparation link includes allowing the sewage to enter the ozone catalytic advanced oxidation tank and then flow directly through the homogeneous catalytic reactor. The reactor is equipped with customized plates, and the plate material can be selected according to different water qualities; the S1 homogeneous catalytic pretreatment step, in which the micro-electrolysis ion addition control link includes releasing catalytic metal ions such as iron or copper ions into the sewage through micro-electrolysis technology, adjusting the current to control the addition amount to the micro-dose level, and the current acts on the plate to accurately release ions as a homogeneous catalyst, which subsequently synergizes with ozone to excite hydroxyl radicals.

4. The ozone catalytic oxidation system according to claim 1, characterized in that: The S1 homogeneous catalytic pretreatment step includes the catalytic ion action mechanism of the released metal ions initially combining with organic matter in the sewage to enhance the activity of the subsequent ozone reaction. The ions act as catalysts to reduce the ozone decomposition energy barrier and activate pollutant molecules in advance. The addition ratio is dynamically optimized by current and is suitable for industrial wastewater.

5. The ozone catalytic oxidation system according to claim 1, characterized in that: The S2 ozone efficient dissolving and mixing step, in which the circulating water extraction and ozone addition links include extracting 20-30% of the raw water for circulation, injecting ozone gas through a high-efficiency ozone dissolving device, and a partial water circulation design to reduce the total ozone demand. The dissolving device integrates an electromagnetic shear field module; the S2 ozone efficient dissolving and mixing step, in which the electromagnetic shear field effect to enhance the dissolution link includes the electromagnetic module applying an electromagnetic shear field, changing the water molecule cluster structure and the pollutant ion atmosphere, destroying the gas-liquid interfacial tension, and the shear field improving the dispersion and solubility of ozone molecules in sewage through physical action.

6. The ozone catalytic oxidation system according to claim 1, characterized in that: The S2 ozone efficient dissolution and mixing step, in which the secondary mixing to achieve uniform contact includes fully stirring the ozone-containing circulating water and the raw sewage through the secondary mixing equipment at the bottom of the pool, and the mixing equipment completes efficient mass transfer in a limited space to ensure uniform distribution of ozone; the S3 heterogeneous catalytic oxidation step, in which the catalyst bed contact link includes the mixed sewage flowing through a filled reactor and contacting a heterogeneous catalyst, the catalyst is fixedly filled, and the surface provides active sites for adsorbing and enriching pollutants; the S3 heterogeneous catalytic oxidation step, in which the hydroxyl radical generation and oxidation link includes the decomposition of ozone to produce hydroxyl radicals under the coordination of the unbalanced potential difference on the catalyst surface and metal ions, and the hydroxyl radical redox potential non-selectively breaks the organic chain to form short chains or mineralizes into carbon dioxide and water.

7. The ozone catalytic oxidation system according to claim 1, characterized in that: The S3 heterogeneous catalytic oxidation step includes a deep degradation link of pollutants, in which refractory organic matter is completely degraded to ensure the effluent quality; the S4 segmented repeated treatment step includes a first-stage raw water treatment link for raw water, a preliminary reduction in the chemical oxygen demand in the effluent, partial circulation of raw water, and preferential treatment of high-concentration pollutants; the S4 segmented repeated treatment step includes a second-stage effluent enhancement link for partial circulation of effluent water from the first stage, repeating the efficient dissolved air and heterogeneous catalytic process, and step-by-step oxidation for residual refractory substances to optimize the reaction depth.

8. The ozone catalytic oxidation system according to claim 1, characterized in that: The S4 repeats the treatment steps in sections. The third stage final oxidation and process integration link in this step includes taking part of the effluent from the second stage for final treatment to ensure that it enters the discharge link after meeting the standards. The three-stage design covers all pollutant concentration gradients and reduces the total amount of ozone by taking the effluent from the previous stage.

9. The ozone catalytic oxidation system according to claim 1, characterized in that: The S5 discharge and resource utilization step includes the water quality compliance verification and discharge process, which includes the final effluent chemical oxygen demand detection of ≤30 mg / L, direct discharge or reuse, complete mineralization of organic matter, ozone serving as a disinfectant to kill pathogens, no chemical sludge generation, and avoidance of secondary pollution.

10. The ozone catalytic oxidation system according to claim 1, characterized in that: The S5 discharge and resource utilization step, in which the sludge thermal hydrolysis and filtrate treatment links include a supporting sludge thermal hydrolysis system, which treats the dehydrated filtrate and returns it to the treatment process, decomposes organic matter through thermal hydrolysis, and reuses the filtrate as a resource to form a closed loop; the S5 discharge and resource utilization step, in which the comprehensive environmental and economic benefits include the fact that the technology only requires oxygen and electricity for operation, no additional reagents are consumed, and the mineralization process generates carbon dioxide and water, with no residual harmful substances.

Images