Plasma-assisted wet oxidation system for treating high-concentration wastewater

Abstract

The utility model discloses a plasma coordinated wet oxidation treatment system for high-concentration wastewater, an inclined plate sedimentation tank, an inclined plate sedimentation tank, a plunger pump, and a heat exchanger are connected in sequence, the heat exchanger is respectively connected to a plasma wet oxidation reaction tower and a gas-liquid separator, the plasma wet oxidation reaction tower is connected to an arc plasma torch, the arc plasma torch is respectively connected to a high-pressure air compressor system, a plasma power supply, a deionized water cooling tower, and a deionized water pump, the deionized water cooling tower is connected to a deionized water pump, the gas-liquid separator is respectively connected to a liquid storage tank and a deacidification tower, and the deacidification tower, an alkali liquid tank, and an alkali liquid circulation pump are connected in sequence. The utility model does not need to add a catalyst, and has a high COD degradation efficiency; it does not need to enter a biochemical system for treatment, and the treated water quality meets the standard; it has high treatment efficiency, short reaction time, small device, small footprint, compact structure, and is easy to manage.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a plasma-coordinated wet oxidation system for treating high-concentration wastewater. Background Art

[0002] With the development of industry and the upgrading of products, the types and quantities of wastewater have increased rapidly, and the composition of industrial wastewater has become more complex, and some are toxic. High-concentration organic wastewater mainly has the following characteristics:

[0003] (1) High concentration of organic matter. The COD in wastewater is generally above 2000 mg / L, and some are even as high as tens of thousands or even hundreds of thousands of mg / L, but the BOD is relatively low. In many wastewaters, the ratio of BOD to COD is less than 0.3.

[0004] (2) Complex composition. The organic matter in wastewater containing toxic substances is mainly aromatic compounds and heterocyclic compounds, and also contains sulfides, nitrides, heavy metals and toxic organic matter.

[0005] (3) High chromaticity and odor. Some wastewater emits a pungent odor, causing adverse effects on the surrounding environment.

[0006] (4) Strong acid and alkalinity. At present, wastewater treatment mainly adopts coagulation and sedimentation, advanced oxidation (electro-flocculation, ozone catalysis, photocatalysis and Fenton, etc.), and biochemical treatment technology. To treat high-concentration wastewater to meet discharge standards, multiple treatment technologies need to be used in combination. The process is long, and the most important thing is that the wastewater quality changes, so it is difficult to achieve discharge standards.

[0007] Plasma is an ionized gas composed of high-energy electrons, positive and negative ions and other active radical particles. The high-energy electrons in plasma exist in excited and unstable states, and are naturally unstable. They plunder the electrons of other unsaturated bonds, break chemical bonds, and form the most stable and simple compounds. Therefore, plasma has self-catalytic properties, which can make many substances react chemically under conditions where chemical reactions cannot occur. Plasma is also praised by the environmental protection industry as the terminator technology for hazardous waste treatment.

[0008] Wet oxidation is a method of introducing oxygen or air into wastewater under certain temperature and pressure conditions to decompose organic matter in the water into nitrogen, water vapor, carbon dioxide, ash and residual organic matter. In order to improve the efficiency of wet oxidation, shorten the reaction time, and reduce the reaction pressure and temperature, a catalyst is often introduced. This technology is used in conjunction with biochemical treatment.

[0009] At present, colleagues in the industry have conducted preliminary attempts to use plasma to treat high-difficulty wastewater.

[0010] CN102418930A uses molecular stripping and plasma incinerator to treat high-concentration organic wastewater system, that is, low-molecular organic matter is removed by air stripping, and macromolecular organic matter and inorganic salts are incinerated by plasma. The incineration temperature is high (up to 1000°C or above), and the inorganic salts (mainly chloride salts) have a low melting point. The inorganic salts melt and block the pipeline, making the system unable to operate normally. CN105036251A and CN106517608A use non-thermal plasma to treat high-concentration organic wastewater. Non-thermal plasma is low-temperature plasma such as corona, DBD or glow discharge. The efficiency of using this plasma is low, and the electron cloud must be under low pressure conditions and high concentration. Therefore, the energy consumption of this method is high and the treatment efficiency is low. In addition to plasma technology, colleagues in the industry are in wet oxidation technology for treating high-concentration wastewater, and it has been running in the papermaking, pharmaceutical and chemical industries. The COD removal rate of wet oxidation technology is low, and it is generally used as a pretreatment technology for biochemical treatment. CN114772832A uses the CO2 generated by the wet oxidation system to reduce the scaling of the system. Although it delays the scaling time, it does not fundamentally resolve the low efficiency of wet oxidation in degrading COD. CN206544962U, WO2015103811A1, CN212894326U, CN1876577B, CN115259456, CN1046761041A, CN104761041B, and KR1019990080272A all use catalytic wet oxidation methods to treat high-concentration wastewater, using catalysts to accelerate the reaction efficiency of wet oxidation. However, the problem of heavy metal escape from the catalyst will occur, causing secondary pollution of the wastewater (mainly heavy metal ion pollution on the catalyst), which will enter the treated water body and cause excessive heavy metals in the removed water. Therefore, it is also necessary to capture and treat the heavy metals in the water body, resulting in additional costs for wastewater treatment. JP01307494A and JP101210097A both use wet oxidation systems to treat high-nitrogen and high-concentration wastewater, converting nitrogen in the wastewater into ammonia for resource utilization, but the low efficiency of wet oxidation reaction is not solved; the flameless torch oxidation tower described in CN211972063U and CN111115933A is essentially a wet oxidation reactor, and the transition metal oxides such as manganese, chromium, cobalt, and nickel used in the reactor are used as catalysts. In the process of wastewater treatment, metal ions inevitably escape, causing secondary pollution to the wastewater; CN217418414U uses microwave-assisted wet oxidation to treat high-concentration wastewater. Although the COD degradation efficiency is improved, there are problems with low microwave power supply efficiency and microwave radiation; CN10683630A uses ozone as a strong oxidant to enhance the efficiency of wet oxidation reaction, but there is a problem that ozone is not fully utilized and there is ozone escape, causing air pollution. Therefore, there is an urgent need for a catalyst-free wet oxidation technology with high degradation efficiency for high-concentration wastewater. Utility Model Content

[0011] The utility model aims to solve the problems of long process flow of existing high-concentration organic wastewater treatment, low COD removal efficiency, metal escape in catalytic wet oxidation degradation COD catalyst, etc., and provides a plasma-coordinated wet oxidation treatment system and method for high-concentration wastewater. The system utilizes the self-catalytic effect of active particles generated by arc plasma and the principle of wet oxidation technology to treat high-concentration wastewater. The system has high COD degradation efficiency, mild reaction conditions, and does not generate secondary waste. The system is suitable for continuous industrial wastewater treatment.

[0012] In order to solve the above technical problems, the technical solution of the utility model is: a plasma synergistic wet oxidation system for treating high-concentration wastewater, including an inclined plate sedimentation tank, the inclined plate sedimentation tank, a plunger pump, and a heat exchanger are connected in sequence, the heat exchanger is respectively connected to a plasma wet oxidation reaction tower and a gas-liquid separator, the plasma wet oxidation reaction tower is connected to an arc plasma torch, the arc plasma torch is respectively connected to a high-pressure air compressor system, a plasma power supply, a deionized water cooling tower, and a deionized water pump, the deionized water cooling tower is connected to a deionized water pump, the gas-liquid separator is respectively connected to a liquid storage tank and a deacidification tower, the deacidification tower, an alkali solution tank, and an alkali solution circulation pump are connected in sequence; the plasma wet oxidation reaction tower includes a reaction chamber, the reaction chamber is provided with a gas-liquid two-phase flow outlet, a high-concentration wastewater inlet, an arc plasma torch installation port, a pressure port, and a temperature port, the outer wall of the reaction chamber is coated with a heat insulating material; the outer wall of the heat insulating material is wrapped with an electromagnetic heating coil.

[0013] Furthermore, a gas-liquid two-phase flow outlet is provided at the bottom of the reaction chamber, an arc plasma torch installation port and a pressure port are provided at the top of the reaction chamber, and a high-concentration wastewater inlet and a temperature port are provided at the side wall of the reaction chamber.

[0014] Furthermore, the high-concentration wastewater inlets are distributed in multiples on the circumference.

[0015] Furthermore, the electromagnetic heating coil is connected to a high-frequency heating power source.

[0016] A plasma-coordinated wet oxidation method for treating high-concentration wastewater comprises two steps: startup and normal operation; startup is to firstly subject the high-concentration wastewater to a dosing reaction precipitation in an inclined plate sedimentation tank to remove solid suspended matter, and then pump it into a plasma wet oxidation reaction tower by a plunger pump, and make the pressure at the pressure port in the plasma wet oxidation reaction tower 1MPa, start a high-frequency heating power supply, heat the temperature in the plasma wet oxidation reaction tower to 160°C, and keep the pressure in the plasma wet oxidation reaction tower at 1MPa during this heating process; when the temperature in the plasma wet oxidation reaction tower reaches 160°C, start the axial flow fan, deionized water pump, and high-pressure air compressor system on the deionized water cooling tower in sequence; start the plasma power supply 1 minute after the high-pressure air compressor system is started, so that the arc plasma torch converts air into plasma, and when the temperature of the thermometer at the temperature port of the plasma wet oxidation reaction tower reaches 200°C, keep the temperature at 200°C and the pressure at 1MPa for 5 minutes to complete the startup process; after the startup process is completed, enter the normal operation process.

[0017] Beneficial effects of the utility model:

[0018] 1. The plasma-assisted wet oxidation method for treating high-concentration wastewater has a wide range of applications and is particularly suitable for highly toxic and difficult-to-degrade wastewater;

[0019] 2. Plasma-assisted wet oxidation is used to treat high-concentration wastewater. No catalyst is required. The COD degradation efficiency is as high as 99% by utilizing the self-catalytic property of plasma.

[0020] 3. Plasma-assisted wet oxidation is used to treat high-concentration wastewater, without the need for biochemical treatment. The treated water quality meets the GB18918 Class A emission standard;

[0021] 4. Plasma-assisted wet oxidation is used to treat high-concentration wastewater, which has high treatment efficiency, short reaction time, small device, small footprint, compact structure and easy management;

[0022] 5. Plasma-assisted wet oxidation is used to treat high-concentration wastewater. No secondary pollutants are generated. C is oxidized into carbon dioxide, and halides and sulfides are oxidized into inorganic chlorides and sulfides, which are absorbed in the post-treatment unit. There is no nitrogen oxide, HCL, SO2, or CO emission in the gas.

[0023] 6. The plasma-assisted wet oxidation method for treating high-concentration wastewater has a unit cost 20% lower than that of catalytic wet oxidation technology under the same feed conditions;

[0024] 7. The plasma-assisted wet oxidation method is used to treat high-concentration wastewater. Under the same feed conditions, the reaction temperature and pressure are lower than those of catalytic wet oxidation, and the safety is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a system diagram of the utility model;

[0026] Figure 2 yes Figure 1 A partial enlarged view Figure 1 ;

[0027] Figure 3 yes Figure 1 A partial enlarged view Figure 2 ;

[0028] Figure 4 It is a schematic diagram of the structure of a plasma wet oxidation reaction tower.

[0029] Among them: 1- plunger pump; 2- inclined plate sedimentation tank; 3- plasma wet oxidation reaction tower; 4- arc plasma torch; 5- high-pressure air compressor system; 6- plasma power supply; 7- deionized water cooling tower; 8- deionized water pump; 9- heat exchanger; 10- gas-liquid separator; 11- liquid storage tank; 12- deacidification tower; 13- alkali solution tank; 14- alkali solution circulation pump; 301- gas-liquid two-phase flow outlet; 302- reaction chamber; 303- electromagnetic heating coil; 304- thermal insulation material; 305- high-concentration wastewater inlet; 306- arc plasma torch installation port; 307- high-frequency heating power supply; 308- pressure port; 309- temperature port. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-4 The specific implementation methods of the utility model are further described.

[0031] The plasma synergistic wet oxidation system for treating high-concentration wastewater comprises an inclined plate sedimentation tank 2, the inclined plate sedimentation tank 2, a plunger pump 1, and a heat exchanger 9 which are connected in sequence, the heat exchanger 9 is respectively connected to a plasma wet oxidation reaction tower 3 and a gas-liquid separator 10, the plasma wet oxidation reaction tower 3 is connected to an arc plasma torch 4, the arc plasma torch 4 is respectively connected to a high-pressure air compressor system 5, a plasma power supply 6, a deionized water cooling tower 7, and a deionized water pump 8, the deionized water cooling tower 7 is connected to the deionized water pump 8, the gas-liquid separator 10 is respectively connected to a liquid storage tank 11 and a deacidification tower 12, the deacidification tower 12, an alkali liquid tank 13, The alkali liquid circulation pump 14 is connected in sequence; the plasma wet oxidation reaction tower 3 includes a reaction chamber 302, a gas-liquid two-phase flow outlet 301 is opened at the bottom of the reaction chamber 302, an arc plasma torch installation port 306 and a pressure port 308 are opened at the top of the reaction chamber 302, a high-concentration wastewater inlet 305 and a temperature port 309 are opened on the side wall of the reaction chamber 302, and the high-concentration wastewater inlet 305 is distributed in multiples on the circumference, and the outer wall of the reaction chamber 302 is coated with a heat insulation material 304; the outer wall of the heat insulation material 304 is wrapped with an electromagnetic heating coil 303, and the electromagnetic heating coil 303 is connected to a high-frequency heating power supply 307.

[0032] The plasma synergistic wet oxidation method for treating high-concentration wastewater includes two steps: startup and normal operation; startup is to firstly perform a dosing reaction precipitation in an inclined plate sedimentation tank 2 to remove suspended solids in the high-concentration wastewater, and then pump it into a plasma wet oxidation reaction tower 3 by a plunger pump 1, and make the pressure of a pressure port 308 in the plasma wet oxidation reaction tower 3 be 1MPa, start a high-frequency heating power supply 307, heat the temperature in the plasma wet oxidation reaction tower 3 to 160°C, and keep the pressure in the plasma wet oxidation reaction tower 3 at 1MPa during the heating process; when the temperature in the plasma wet oxidation reaction tower 3 reaches At 160°C, start the axial flow fan, deionized water pump 8, and high-pressure air compressor system 5 on the deionized water cooling tower 7 in sequence; start the plasma power supply 6 1 minute after the high-pressure air compressor system 5 is started, so that the arc plasma torch 4 converts the air into plasma (including free electrons, metastable and excited positive and negative oxygen particles, metastable and excited positive and negative nitrogen particles, UV, photons). When the temperature at the temperature port 309 of the plasma wet oxidation reaction tower 3 reaches 200°C, maintain the temperature at 200°C and the pressure at 1MPa for 5 minutes to complete the startup process; after the startup process is completed, enter the normal operating condition. Normal operating conditions refer to the high-concentration wastewater being treated according to Figure 1 In the process shown, high-concentration wastewater is treated in a pretreatment unit and then passes through a plasma wet oxidation unit. Organic matter is degraded under the autocatalytic action of plasma active particles and the synergistic action of wet oxidation. The degraded gas-liquid two-phase products are treated in a post-treatment unit and meet the emission standards.

[0033] The specific implementation process is as follows:

[0034] High-concentration wastewater enters the mixing chamber of the inclined plate sedimentation tank 2, and reagents are added to the mixing chamber (different reagents are added according to the suspended matter and heavy metal ions in the wastewater). Start the agitator for uniform mixing, the speed of the agitator is 40-100r / min, and after uniform mixing, it enters the reaction chamber and starts stirring to allow the reagent and wastewater to fully react. The speed of the agitator is 40-100r / min, and the reaction time is 10-30min; after the wastewater and the reagent fully react, it enters the sedimentation separation chamber, which is equipped with an inclined tube. The Reynolds number of the wastewater in the sedimentation separation chamber is less than 400, and the hydraulic load is 9-30m 3 / m 2.h, wastewater retention time 20-40min; the flocs formed by the wastewater and the reagent are separated in the inclined tube area, and the suspended matter and the precipitate formed by heavy metals fall to the bottom area of ​​the inclined tube area under gravity and are scraped to the sludge area under the action of the scraper of the sludge scraper, and then transported to the sludge pool by external force; the wastewater with suspended matter and heavy metals removed enters the water chamber and is transported by the plunger pump 1 through the heat exchanger 9 (at this time, the heat exchanger 9 has no heat exchange function in the startup stage) to the specified liquid level of the plasma wet oxidation reaction tower 3, and the gas-liquid two-phase flow outlet 301 outlet valve and the plunger pump 1 of the plasma wet oxidation reaction tower 3 are closed, and the high-frequency heating power supply 307 is started to heat the temperature in the plasma wet oxidation reaction tower 3 to 160°C, and the pressure in the plasma wet oxidation reaction tower 3 is maintained at 1MPa during this heating process. When the temperature in the plasma wet oxidation reaction tower 3 reaches 160°C, the axial flow fan, deionized water pump 8, and high-pressure air compressor system 5 on the deionized water cooling tower 7 are started in sequence; the plasma power supply 6 is started 1 minute after the high-pressure air compressor system 5 is started, so that the arc plasma torch 4 converts air into plasma. When the temperature of the temperature port 309 of the plasma wet oxidation reaction tower 3 reaches 200°C, the temperature is maintained at 200°C (with an upper and lower deviation of 50°C) and the pressure is maintained at 1MPa for 5 minutes to complete the startup process. During the startup process, due to the operation of the arc plasma, the power of the high-frequency heating power supply 307 should be appropriately reduced to maintain the temperature in the plasma wet oxidation reaction tower 3 at 200°C. At this time, the startup stage is completed.

[0035] After the start-up phase is completed, the normal operation phase is entered. That is, the valve of the gas-liquid two-phase flow outlet 301 of the plasma wet oxidation reaction tower 3 is opened and the plunger pump 1 is started. The high-concentration wastewater and the added reagent are sent to the mixing chamber of the inclined plate sedimentation tank 2, and the reagent is added to the mixing chamber (the reagent added is different according to the suspended matter and heavy metal ions in the wastewater). The stirrer is started for uniform stirring and mixing. The speed of the stirrer is 40-100r / min. After the mixture is uniform, it enters the reaction chamber and starts stirring to fully react the reagent with the wastewater. The speed of the stirrer is 40-100r / min, and the reaction time is 10-30min; after the wastewater fully reacts with the reagent, it enters the sedimentation separation chamber. The sedimentation separation chamber is provided with an inclined tube. The Reynolds number of the wastewater in the sedimentation separation chamber is less than 400, 9-30m 3 / m 2.h, wastewater retention time is 20-40min; the flocs formed by the wastewater and the reagent are separated in the inclined tube area, and the suspended matter and the precipitate formed by heavy metals fall to the bottom area of ​​the inclined tube area under gravity and are scraped to the sludge area by the scraper of the scraper, and then transported to the sludge pool by external force; the wastewater with suspended matter and heavy metals removed enters the water chamber and is transported by the plunger pump 1 to the heat exchanger 9 to exchange heat with the high-temperature liquid coming out of the plasma wet oxidation reaction tower 3, and then enters the plasma wet oxidation reaction tower 3 for COD degradation reaction. After being pressurized by the plunger pump 1 and heated by the heat exchanger 9, the wastewater enters the feed spray nozzle of the plasma wet oxidation reaction tower 3, forming a mist in the tower. To prevent the nozzle from being blocked, a spiral nozzle is used. The nozzles are evenly arranged circumferentially, and the number is a multiple of 2 or 3. The nozzles are solid, and the angles are 60° and 90°. The plasma torch uses air as the working gas, and the air comes from the high-pressure air compressor system 5. The air pressure is 0.2MPa higher than the pressure of the plasma wet oxidation reaction tower 3. The air needs to be degreased and dusted before being sent to the arc plasma generator. Under the action of the electric field force generated by the plasma power supply 6, the air ionizes the oxygen and nitrogen in the air into high-energy electrons, oxygen positive and negative particles, ozone, nitrogen positive and negative particles, ultraviolet rays and other active particles in the cavity of the arc plasma torch 4. The plasma with active particles is discharged at the outlet of the arc plasma torch 4. The plasma active zone is formed at the mouth; the plasma active particles fully react with the high-concentration wastewater to oxidize COD into carbon dioxide, water, hydrogen chloride, sulfur dioxide and nitrogen (nitrogen-containing organic matter); the reaction pressure of the plasma wet oxidation reaction tower 3 is 0.1-10MPa, the temperature is 60-300°C, and the reaction time is 10-30min; the plasma is cooled by deionized water, and the deionized water enters the deionized water cooling tower 7 after heat exchange with the arc channel of the plasma torch in the water chamber of the plasma torch. The deionized water is cooled and heat exchanged by the air sucked by the fan in the deionized water cooling tower 7 and then pumped into the arc plasma torch 4 through the deionized water pump 8. The wastewater passes through the plasma wet oxidation reaction tower 3 to form a two-phase fluid of water and gas. The two-phase fluid passes through the heat exchanger 9 and the wastewater of the pretreatment unit and then enters the post-treatment unit. The gas-liquid two-phase flow after heat exchange with the wastewater enters the gas-liquid separator 10 of the post-treatment unit for gas-liquid separation, and the separated liquid enters the liquid storage tank 11 for discharge; the separated gas enters the deacidification tower 12, and the deacidification tower 12 uses alkali liquid to absorb the acidic gas in the gas, and the alkali liquid of a certain concentration stored in the alkali liquid tank 13 is neutralized and removed by the alkali liquid circulation pump 14 with the acidic gas in the gas, and the deacidified gas is discharged.

[0036] Example 1

[0037] The total cyanide in the treated wastewater is 4500mg / L, and the COD is 120580mg / L. The treatment conditions are: the reagents in the inclined plate sedimentation tank 2 are PAC and PAM; the frequency of the medium frequency power supply is 4KHz, the power of the arc plasma torch 4 is 100KW, the pressure of the plasma wet oxidation reaction tower 3 is 1.2MPa, the temperature is 220℃, and the reaction time is 20min. Under the working conditions, the COD in the effluent of the device is 21mg / L, and the total cyanide is 0.2mg / L.

[0038] Example 2

[0039] The treatment of landfill leachate, COD is 9200mg / L, chromaticity is 5000. The treatment conditions are: inclined plate sedimentation tank 2 reagents are PAC, PAM, Na2S, Na2CO3; the frequency of the medium frequency power supply is 3KHz, the power of the arc plasma torch 4 is 50KW, the pressure of the plasma wet oxidation reaction tower 3 is 0.8MPa, the temperature is 280℃, the reaction time is 25min, the COD in the effluent of the device is 15mg / L, the chromaticity is 60.

[0040] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, according to the technical scheme and utility model concept of the utility model, shall be covered by the protection scope of the utility model.

Claims

1. Plasma-assisted wet oxidation treatment of high-concentration wastewater system, characterized in that: The invention comprises an inclined plate sedimentation tank (2), wherein the inclined plate sedimentation tank (2), a plunger pump (1), and a heat exchanger (9) are connected in sequence, the heat exchanger (9) is respectively connected to a plasma wet oxidation reaction tower (3) and a gas-liquid separator (10), the plasma wet oxidation reaction tower (3) is connected to an arc plasma torch (4), the arc plasma torch (4) is respectively connected to a high-pressure air compressor system (5), a plasma power supply (6), a deionized water cooling tower (7), and a deionized water pump (8), the deionized water cooling tower (7) is connected to the deionized water pump (8), the gas-liquid separator (10) is respectively connected to a liquid storage tank (11) and a deacidification tower (12), the deacidification tower (12), an alkali liquid tank (13), and an alkali liquid circulation pump (14) are connected in sequence; The plasma wet oxidation reaction tower (3) comprises a reaction chamber (302), the reaction chamber (302) is provided with a gas-liquid two-phase flow outlet (301), a high-concentration wastewater inlet (305), an arc plasma torch installation port (306), a pressure port (308), and a temperature port (309), the outer wall of the reaction chamber (302) is coated with a heat insulating material (304); and the outer wall of the heat insulating material (304) is wound with an electromagnetic heating coil (303).

2. The plasma-assisted wet oxidation system for treating high-concentration wastewater according to claim 1, characterized in that: The bottom of the reaction chamber (302) is provided with a gas-liquid two-phase flow outlet (301), the top of the reaction chamber (302) is provided with an arc plasma torch installation port (306) and a pressure port (308), and the side wall of the reaction chamber (302) is provided with a high-concentration wastewater inlet (305) and a temperature port (309).

3. The plasma-assisted wet oxidation system for treating high-concentration wastewater according to claim 2, characterized in that: The high-concentration wastewater inlets (305) are distributed in multiples on the circumference.

4. The plasma-assisted wet oxidation system for treating high-concentration wastewater according to claim 1, characterized in that: The electromagnetic heating coil (303) is connected to a high-frequency heating power source (307).

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