112 results about "Wet oxidation" patented technology

The present invention relates to the technical field of municipal sludge and industrial sludge treatment methods. Disclosed is a hydrothermal carbonization-based method for comprehensively treating iron-containing sludge and straw, comprising the following steps: 1) crushing and sieving straw, primarily dehydrating iron-containing sludge, and adding a catalyst for catalytic wet oxidation treatment; 2) adding wet-oxidized iron-containing sludge and a crushed and sieved fiber to a raw material storage tank and adding a dehydrating agent for dehydration treatment; 3) preheating a raw material conveying tank and then feeding the material into a reactor for a hydrothermal carbonization reaction; 4) collecting the resulting biochar slurry to a collecting tank for cooling; and 5) adding an appropriate amount of pulverized coal to the material and then carrying out plate press dehydration, or directly carrying out plate press dehydration, the material being used as a solid fuel. The present invention integrates two techniques, i.e., anaerobic digestion and hydrothermal carbonization, for sludge treatment, and the process is optimized from material and energy balance perspectives, so that the solid fuel and biochar substances are generated while sludge reduction is realized; moreover, the operation cost of the process is reduced, and the generated hydrothermal carbon can be either returned to the field for use or be used as an additive to promote anaerobic digestion, and also exhibits magnetism and can be recycled.

The invention discloses a treatment method of salt-containing organic wastewater, and belongs to the technical field of wastewater treatment. The method comprises the following steps: S1, mixing raw materials containing to-be-treated salt-containing organic wastewater, a metal salt catalyst and a first oxidant to obtain a first mixture; the first mixture is subjected to a first-stage catalytic wet oxidation reaction, and first-stage treated wastewater is obtained; wherein the temperature of the first-stage catalytic wet oxidation reaction is 130-160 DEG C; s2, mixing the primary treatment wastewater with a second oxidant to obtain a second mixture; the second mixture is subjected to a second-stage catalytic wet oxidation reaction, and second-stage treated wastewater, namely final treated wastewater, is obtained; wherein the temperature of the second-stage catalytic wet oxidation reaction is 200-280 DEG C. According to the treatment method, the high-temperature wet oxidation temperature and the retention time are reduced; container corrosion is reduced to the maximum extent, and investment cost and safety risks are reduced. The organic matters in the wastewater can be effectively degraded, and the TOC content is reduced.

The invention relates to a continuous wet oxidation device for enhanced mass transfer treatment of high-salinity organic wastewater. The continuous wet oxidation device comprises a wastewater storage tank, a liquid inlet system, a high-pressure oxygen storage tank, a gas inlet system, a mass transfer enhanced reactor, a gas-liquid separation system and an oxygen recovery system, the mass transfer enhanced reactor is of a shell-and-tube structure and comprises a reactor shell and a built-in ceramic distributor; a tube pass is formed in the ceramic distributor, and a shell pass is formed between the ceramic distributor and the reactor shell; the tube pass is provided with a liquid feeding port and a liquid discharging port, and the shell pass is provided with a gas feeding port. Oxygen is distributed to a tube pass through the ceramic distributor and is quickly dispersed into micron-sized bubbles, so that the contact area between gas and liquid is increased, and the oxygen utilization rate and the reaction efficiency are improved.

The application discloses a process method for zero discharge of ethylene alkali residue wastewater, which comprises a wet oxidation section, a biochemical section and a salt treatment section; the wet oxidation section comprises a heat exchange unit, a wet oxidation reactor, a cooler and an adjusting tank; the biochemical section comprises an electrodialysis I, aerobic biochemical treatment, ozone catalytic oxidation, anaerobic biochemical treatment, secondary biochemical treatment, a recycled water pool and a methane purification unit; the salt treatment section comprises a tubular microfiltration, an electrodialysis II, a decarbonizer, a salt separation system, a biological reactor and a reverse osmosis; wherein the modified anion exchange membrane used in the electrodialysis has the characteristics of strong anti-pollution ability and high ion exchange rate, can effectively realize the separation of salt and organic matters in the wet oxidation effluent of the ethylene alkali residue, solves the problem of difficult treatment of the organic matters in the wet oxidation effluent of the ethylene alkali residue, and finally realizes zero discharge.

This invention provides a semi-coke wastewater treatment device and process. The semi-coke wastewater treatment device comprises, in sequence, a semi-coke production wastewater conditioning system, an electrolytic flotation system, a freeze crystallization system, a salt phase conditioning system, a high-temperature wet oxidation system, and an ammonia nitrogen stripping and distillation system. The freeze crystallization system is connected to an aqueous phase conditioning system, a BDD electro-oxidation system, and a biochemical system. The ammonia nitrogen stripping and distillation system is connected to the biochemical system. This invention effectively solves a series of technical problems in existing semi-coke wastewater treatment devices, such as lengthy process flows, high equipment investment and operating energy consumption, and clogging of the ammonia stripping and phenol removal unit due to phenol polymerization and coking, and oil adhesion. This invention also provides a semi-coke wastewater treatment process.

The application discloses a wet oxidation catalyst, which comprises the following raw materials in percentage by weight: 0.1-2% noble metal, 1-10% graphene-based material, and the rest is a carrier, wherein the carrier is modified titanium dioxide, specifically, a rare earth-transition metal-oxygen vacancy-mesoporous three-dimensional gradient titanium dioxide carrier. The application aims at solving the technical problem of poor stability of the catalyst.

The invention discloses a catalytic wet oxidation reaction system and a method for prolonging the continuous operation period of catalytic wet oxidation. The system comprises an oxidation tower, a steam generator, a steam-liquid separation tank, a falling film circulating pump, a pre-oxidation tower, a booster pump and a steam-water mixer, an oxidized water outlet of the oxidizing tower is communicated with an oxidized water inlet of the steam generator, oxidized water and pure water in the steam generator are subjected to heat exchange, the pure water is heated and pressurized to generate high-temperature steam, and the oxidized water is cooled; the high-temperature steam is introduced into a steam-water mixer through a steam-liquid separation tank, so that the high-temperature steam is mixed with the raw water to preheat the raw water; preheated raw water is pre-oxidized through the pre-oxidation tower and is introduced into an inlet of the oxidation tower through a booster pump; and the falling film circulating pump circularly pumps the separated liquid pure water into the steam generator. High-temperature steam is used for preheating raw water for the first time, a traditional tubular heat exchanger and a traditional heater are not needed, the problem of frequent blockage of the heat exchanger and the heater is solved, the continuous operation period of the device is greatly prolonged, and a high-temperature steam byproduct is generated.

The present application relates to a kind of wastewater microplastics disposal method based on subcritical wet oxidation disposal method.The method comprises: wastewater is coagulated, and microplastic coagulation floc is obtained;Specifically including wastewater: coagulant: inorganic coagulant: organic flocculant is compounded according to the mass ratio of 1,000,000: (10-200) : (1-10) : (5-50) wastewater is coagulated;It is placed in reaction kettle and participates in subcritical wet oxidation reaction;Wherein, water is introduced into reaction kettle, oxidizing agent is introduced into reaction kettle, temperature is 200 DEG C to 260 DEG C, pressure is 1.6 MPa to 6.7 MPa, time is 30 min to 60 min, reaction product includes organic acid, by the above method, microplastic in wastewater is decomposed to form small molecule organic acid, eliminate the damage that microplastic can be to environment or organism.

The present application relates to the technical field of combustible substance detection in ammonium nitrate, and provides an automatic device for detecting combustible substance in ammonium nitrate, which comprises a reagent storage unit for storing ammonium nitrate sample, sodium persulfate reagent and phosphoric acid reagent; a CO2 infrared analyzer is connected with the reagent storage unit, the CO2 infrared analyzer can receive the reagent supplied by the reagent storage unit and determine the content of CO2 after the combustible substance in the ammonium nitrate sample is oxidized by the sodium sulfate reagent to form CO2; a controller controls the reagent storage unit to supply the reagent to the CO2 infrared analyzer, and receives and analyzes the content information of CO2 determined by the CO2 infrared analyzer to obtain the content of combustible substance in ammonium nitrate. The automatic device for detecting combustible substance in ammonium nitrate provided by the present application realizes efficient detection of combustible substance by using wet oxidation-infrared quantitative technology.

This invention discloses an apparatus and method for co-producing steam using catalytic wet oxidation. The reactor of the apparatus is equipped with a heat extraction module, which includes a heat exchange chamber and a heat extraction medium inlet and outlet connecting to the heat exchange chamber. The heat extraction module also has multiple channels spaced apart from the heat exchange chamber along its thickness for radial flow of materials within the reactor. By incorporating a heat extraction module inside the reactor, this invention can promptly remove the heat of reaction from the catalytic wet oxidation reaction, ensuring the reactor operates at a constant temperature. This significantly improves the reactor's adaptability to TOC content in wastewater. Simultaneously, the heat removed from the reactor can be co-produced using a steam generator. This invention's reaction system not only achieves catalytic wet oxidation treatment of high-content organic wastewater but also realizes comprehensive heat utilization, further reducing wastewater treatment costs.

The invention discloses a high-temperature corrosion-resistant continuous wet oxidation treatment system and method. The system comprises a wastewater pretreatment module, a pressurization preheating system, a wet oxidation reactor module, a depressurization cooling system and a gas-liquid separation and tail gas treatment module which are connected in sequence. The treatment method comprises a pretreatment stage, a pressurizing and preheating coupling stage, a gradient oxidation reaction stage, a stepped depressurization waste heat recovery stage and a gas-liquid separation and tail gas purification stage. According to the continuous flow tubular reactor structure disclosed by the invention, deep mineralization of organic pollutants is realized by combining the strong oxidizing property of wet oxygen at high temperature and high pressure, the COD (Chemical Oxygen Demand) removal rate can reach 90% or above, and the biodegradability of effluent is greatly improved; heat energy in high-temperature outlet water is fully recycled through the pipe sleeve type heat exchanger to preheat fed materials, and the requirement for an external heat source is reduced; a temperature fine-adjustment heater is arranged in an auxiliary mode, and total energy consumption is further saved; the pressure reduction coil pipe controls stable release of liquid outlet pressure, and the problems of equipment impact and corrosion caused by vapor-liquid flash evaporation are effectively prevented.

The application relates to a preparation method of a high-quality large-thickness silicon dioxide film layer, and belongs to the technical field of silicon-based photonic device preparation. The application aims to solve the problem that the large thickness and the high-quality and high-performance film layer cannot be considered simultaneously in the prior art, and provides a preparation method of a high-quality large-thickness silicon dioxide film layer; the method combines a dry-wet oxidation process and high-temperature annealing, designs part of the dry oxygen and the annealing process while the dry-wet-dry process is reformed, and can improve the quality and the light binding property of the large-thickness silicon dioxide film layer while the growth rate is maintained.

The invention relates to a pulse buffer tank non-condensable gas constant-current sampling device in the technical field of wet oxidation decarburization and sulfur removal, which comprises a gas delivery pipe, the gas inlet end of the gas delivery pipe is communicated with an exhaust port at the top of a pulse buffer tank, and the gas outlet end of the gas delivery pipe is communicated with a diameter-expanded hollow pipe; the cooling and washing system is arranged on the gas conveying pipe; the steam-water separation system is arranged on the gas conveying pipe; the air inlet end of the traction pipe penetrates through the side surface of the diameter-expanding and oppositely-arranged pipe and is communicated with the interior of the diameter-expanding and oppositely-arranged pipe, and the air outlet end of the traction pipe is connected with the sample input ends of the hydrogen analyzer and the oxygen analyzer; a suction pump is arranged on the traction pipe, and is used for providing negative pressure to suck the non-condensable gas sample gas in the diameter-expanding paired pipe into the hydrogen analyzer and the oxygen analyzer through the traction pipe; and the refrigeration and dehumidification system is arranged on the traction pipe. The problems that when non-condensable gas in a dissolution pulse buffer tank is sampled, the sampling stability is poor due to pulse pressure, and the detection precision is affected are solved.

The application discloses a multilayer copper sheet bonding method, which comprises three procedures of surface treatment impurity removal, copper sheet oxidation and copper sheet sintering. When the copper sheet is oxidized, gradient heating dry oxidation or KOH and K2S2O8 mixed aqueous solution wet oxidation is adopted to perform copper sheet surface oxidation; when sintering, the copper sheet after oxidation is placed between two porous sintering plates, and after being limited by clamping, the sintering condition is adopted to perform temperature rising and temperature dropping under the condition of argon protection, and bonding is completed.

The utility model discloses a wet oxidation reactor which comprises a barrel, a steam inlet pipe is arranged on the left side of the bottom of the barrel, and an exhaust pipe is arranged on the right side of the top of the barrel; a wastewater inlet pipe is arranged on the left side of the top of the barrel; a drain pipe is arranged on the right side of the bottom of the barrel; the middle part of the cylinder body is communicated with a hydrogen peroxide pipe, and a tower tray which is horizontally arranged in the cylinder body is arranged below the liquid outlet end of the hydrogen peroxide pipe; an air inlet pipe is arranged above the liquid discharge pipe and is connected with an L-shaped air pipeline arranged in the cylinder body; a plurality of air spraying pipes are arranged on the air pipeline, and obliquely-arranged blocking eaves are arranged on the air spraying pipes in a matched mode. Gas and liquid are fully mixed, the mass transfer effect is good, the structure is simple, the use is convenient, and the COD (Chemical Oxygen Demand) of wastewater can be effectively reduced.

The invention discloses a wastewater treatment system and method for catalytic wet oxidation, and the treatment system comprises a vortex bubble generator; the oxidation reactor is positioned at the downstream of the vortex bubble generator; the heater is positioned at the upstream of the vortex bubble generator; and a preheater located upstream of the heater. According to the treatment system disclosed by the invention, the vortex effect of the wastewater is enhanced under the dual effects of the flow guide slit and the flow guide spiral of the vortex bubble generator, and the micro-nano bubble generation efficiency is improved. In the catalytic wet oxidation reaction process, oxygen enters the oxidation reactor in the form of micro-nano bubbles, and compared with millimeter-scale bubbles in a traditional gas distribution mode, the retention time of the oxygen is prolonged, the specific surface area of the bubbles is large, the gas-liquid mass transfer rate is increased, the generation rate of free radicals is increased, and the catalytic wet oxidation reaction efficiency is improved. Meanwhile, oxygen enters the oxidation reactor in the form of micro-nano bubbles, so that the consumption of the oxygen is reduced while the reaction efficiency is improved.

The invention discloses a system and a method for deeply oxidizing sulfur-containing waste lye at low temperature and normal pressure, and belongs to the technical field of petrochemical wastewater treatment. According to the technical scheme, the method comprises the following steps: 1) preparing peroxide by taking one of sodium persulfate or a mixed solution of ammonium sulfate, hydrogen peroxide and sulfuric acid as a raw material; 2) preparing a peroxide solution, and adjusting the concentration and the pH value; (3) carrying out oxidation reaction on the peroxide and the waste alkali liquor in the presence of a catalyst; the method and the system for deeply oxidizing the waste alkali liquor containing high-concentration S < 2->, phenols and COD (Chemical Oxygen Demand) at low temperature and normal pressure by utilizing peroxide are particularly suitable for the waste alkali liquor with high pH value and complex organic matters, and the problems of high energy consumption and high investment of the traditional high-temperature and high-pressure wet oxidation process are solved.

The present application provides a kind of nitrogen-doped catalyst and catalytic wet oxidation method, catalyst is carried out by the coprecipitation reaction of soluble salt of iron, lanthanum and copper, and in rotary evaporator device, aging, dry and then mixed with nitrogen-containing precursor grinding, calcination is obtained under inert atmosphere.The specific surface area of catalyst of the present application is 60-120cm 2 ·g ‑1 , the doping amount of nitrogen is 0.5-2.0wt%.For catalytic wet oxidation, due to the doping of copper in B site, it is anchored in the lanthanum ferrite framework, reducing the loss of metal copper, making the catalyst more stable, and improving the catalytic performance of lanthanum ferrite catalyst.

This invention relates to a method for testing twin defects in pre-oxidized wafers using a particle testing machine, belonging to the field of semiconductor wafer defect detection technology. The method includes the following steps: Step 1: Thermal oxidation preparation; the grown oxide film is obtained through wet oxidation in an oxidation furnace, and the wafer is cleaned using a final cleaning machine. Step 2: Particle testing method optimization and film establishment. Step 3: Result comparison and verification; by establishing an Oxide Film model, the signal processing algorithm of the particle testing machine can distinguish between particle signals and twin signals, thereby achieving synchronous capture. Step 4: By optimizing the particle testing machine method, twin defect detection of the pre-oxidized wafer is successfully completed simultaneously during particle testing. By optimizing the particle testing machine method, synchronous detection of particle testing and twin defects is achieved, thereby improving detection efficiency, shortening the process, and maintaining the integrity of the sample.

The invention belongs to the field of petrochemical engineering, and relates to a micro-nano bubble reinforced alkaline residue wastewater resourceful treatment system and a micro-nano bubble reinforced alkaline residue wastewater resourceful treatment method. The system comprises an alkaline residue wastewater input pipe, a pretreatment unit, a pre-oxidation unit, an oxidation unit and a product separation unit which are connected in sequence, the pretreatment unit comprises at least one pretreatment device, and at least one group of flue gas conveyors are arranged at the bottom of each pretreatment device; the pre-oxidation unit comprises at least one pre-oxidation device and a catalyst conveying pipeline, at least one group of air conveyors are arranged at the bottom of each pre-oxidation device, and the catalyst conveying pipeline is connected with each pre-oxidation device; the oxidation unit comprises a wet oxidation device and an ozone oxidation device which are connected in sequence, an ozone aeration device is arranged at the bottom of the ozone oxidation device, and the flue gas conveyor and the air conveyor are micro-nano bubble generation devices. According to the method, a large amount of S2-ions in the alkaline residue wastewater are separated and removed preferentially, the subsequent Na2CO3 separation process is simplified, and the purity of the product is improved.

The application belongs to the technical field of semiconductor material manufacturing, and particularly relates to a preparation method of a piezoelectric single crystal composite film material, which comprises the following steps: ion implantation of a piezoelectric functional material, wet oxidation treatment of a surface of a supporting substrate, subsequent cleaning and blow-drying, activation treatment of the surface of the supporting substrate and the piezoelectric functional material using oxygen and nitrogen mixed plasma, pre-bonding and standing in a low vacuum environment, nitrogen annealing, thinning and peeling. The preparation method has the advantages of simple process and low cost. The composite film prepared by the method has high bonding strength, no damage at a peeling interface, and effectively avoids collapse and fragments, effectively improves yield, and is beneficial to industrialized production.

The invention relates to the technical field of acrylonitrile production, in particular to a co-processing and high-value utilization process of an acrylonitrile byproduct ammonium sulfate solution. Comprising the steps of multi-stage pretreatment, catalytic wet oxidation, ammonia rectification and recovery, ammonium sulfate refining and water recycling. The method comprises the following steps: adjusting the pH value of an ammonium sulfate solution generated by an acrylonitrile quench tower, and then settling and filtering; mixing with elemental oxygen-containing gas, and removing organic matters and cyanides through catalytic wet oxidation; concentrating and condensing the solution, rectifying to obtain ammonia gas flow with the purity of more than or equal to 99%, and returning to the acrylonitrile reactor; crystallizing, recrystallizing, decoloring and drying the concentrated solution to obtain an ammonium sulfate product with the purity of more than or equal to 99.4%; rectifying kettle liquid and crystallization mother liquid are adsorbed and then are used as process replenishing water, and the water circulation rate is 79%-83%. The COD (Chemical Oxygen Demand) of the treated wastewater is less than or equal to 5000mg / L, and the total cyanogen is less than or equal to 5mg / L. The method realizes deep removal of pollutants and efficient recovery of resources, is environment-friendly and excellent in economical efficiency, and can be used for an acrylonitrile industrial device.

The invention discloses a method and a system for recovering high-quality sulfur through directional conversion of wet oxidation hydrogen sulfide. The device consists of a wet oxidation desulfurization unit, a sulfur refining unit, a desulfurization liquid deoiling unit and a material balancing unit, and is characterized in that the wet oxidation desulfurization unit comprises a catalyst storage tank, a dosing pump, wet oxidation absorption equipment, wet oxidation regeneration equipment and a sulfur foam tank which are sequentially connected through pipelines; or the wet oxidation desulfurization unit comprises a catalyst storage tank, a dosing pump, wet oxidation absorption-regeneration integrated equipment and a sulfur foam tank which are connected in sequence. The catalyst adopted by the invention is adaptive to the wet oxidation desulfurization process, so that the yield of elemental sulfur is 99% or above, and the generation of sulfur-containing secondary salts can be greatly inhibited. On the basis that the yield of elemental sulfur is 99%, the directional adsorption oil separation equipment and the desulfurization liquid film type scraper evaporation salt separation equipment directionally separate hydrocarbon oil substances to upstream for use through a selective adsorption material and equipment.

This invention relates to a flame-retardant, hydrophobic porous matrix supported noble metal catalyst, its preparation method, and its application. The preparation method of the flame-retardant, hydrophobic porous matrix supported noble metal catalyst is simple, with high mechanical strength and strong hydrothermal stability. It exhibits excellent catalytic performance for treating volatile organic compounds in humid VOCs and has a long service life. Furthermore, it is also suitable for the catalytic wet oxidation of wastewater.

The application relates to a flame-retardant porous matrix loaded non-noble metal catalyst, a preparation method and application thereof. The preparation method of the flame-retardant porous matrix loaded non-noble metal catalyst is simple, the mechanical strength is high, the hydrothermal stability is strong, the catalyst has good volatile organic compound catalytic performance in VOCs treatment, and the service life is long, and the catalyst can also be applied to catalytic wet oxidation of waste water.

The utility model discloses a high-pressure reaction kettle for wet oxidation. The high-pressure reaction kettle mainly comprises a reaction kettle body, a heating tank, a stirring device and a pressure control system, specifically, the reaction kettle body is designed to be of a cylindrical structure, the inner wall of the reaction kettle body is particularly coated with a corrosion-resistant material layer, and the material layer can effectively resist corrosive substances possibly generated in the chemical reaction process, so that the reaction kettle body is protected from being damaged; the heating tank is very elaborate in design, and the corrosion-resistant material layer is arranged on the inner wall of the reaction kettle body, so that corrosion of reactants to the kettle body can be effectively prevented, and the service life of equipment is prolonged; the heating tank covers the reaction kettle body and the feeding pipe, so that reactants can be quickly and uniformly heated, and the reaction efficiency is improved. The stirring device can ensure that reactants are fully mixed in the reaction kettle, so that the reaction uniformity and efficiency are improved; and the pressure sensor monitors the pressure in the reaction kettle in real time to ensure that the reaction process is carried out in a safe pressure range.

The utility model discloses an alcohol-containing wastewater pretreatment system which comprises an aeration sedimentation tank, a produced water outlet of the aeration sedimentation tank is communicated with a low-temperature wet oxidation reactor, a produced water outlet of the low-temperature wet oxidation reactor is communicated with a chemical sedimentation tank, and a produced water outlet of the chemical sedimentation tank is communicated with an ammonia nitrogen stripping tower. A produced water outlet of the ammonia nitrogen stripping tower is communicated with an AO biochemical reaction system, and a biochemical sludge outlet of the AO biochemical reaction system is communicated with a sludge inlet of the aeration sedimentation tank. Through the aeration sedimentation tank, the low-temperature wet oxidation reactor, the chemical sedimentation tank and the ammonia nitrogen stripping tower which are communicated in sequence, substances such as suspended solids, sulfur-containing impurities and nitrogen-containing organic impurities and part of organic matters in the alcohol-containing wastewater are removed, the influence of the substances on microorganisms is eliminated, normal and effective operation of an AO biochemical reaction system is ensured, and the treatment effect of the AO biochemical reaction system is improved. The alcohol-containing wastewater treatment efficiency and quality are improved.

The application discloses a wastewater treatment method based on a modified wet oxidation reaction, which comprises the following steps: step 1, after wastewater is treated by modification, the wastewater is preheated by a multi-stage heat exchanger; step 2, the preheated wastewater and an oxidant are jointly introduced into a wet oxidation tower provided with a solid catalyst, and the wet oxidation tower is gradually heated to a required reaction temperature to perform a wet oxidation reaction; step 3, a gas-liquid mixture flowing out of the wet oxidation tower is subjected to gas-liquid separation, and both the separated gas phase and the liquid phase are introduced into the multi-stage heat exchanger in step 1 to perform heat exchange with the wastewater in step 1, so that the wastewater is preheated; and step 4, the cooled gas phase and the liquid phase are separated again, the separated gas phase is introduced into the wastewater in step 1 to modify the wastewater, and the separated liquid phase is further treated or discharged. The method can effectively degrade organic pollutants in the wastewater, has low energy consumption and operation cost, and is stable in process operation.

The invention discloses an advanced oxidation treatment method for organic wastewater, which comprises the following steps: in the presence of oxygen-containing gas, the organic wastewater enters a wet oxidation reactor for reaction, and the wet oxidation reactor is sequentially filled with a copper-based catalyst and a catalytic oxidation catalyst according to the contact sequence with the organic wastewater. According to the provided treatment method, organic matter is efficiently removed, and meanwhile the problem of metal loss of the copper-based catalyst can be solved.

This utility model discloses a heterogeneous catalytic wet oxidation device suitable for coking wastewater treatment, belonging to the field of wastewater treatment. The device mainly includes an equalization tank (1), a dosing device (2), a sedimentation tank (3), a high-pressure pump (4), a wastewater tubular heat exchanger (5), a reaction tower (6), a gas tubular heat exchanger (7), an air compressor (8), a condenser (9), a gas-liquid separator (10), a tail gas treatment device (11), a spray system (12), a nano-catalyst partition (13), and a micro-nano aeration device (14). The high-temperature flue gas from the coking plant is used to heat the air (or other oxygen-containing gas) to achieve waste heat utilization. The nano-catalyst partition utilizes carbon fibers to support nano-catalysts. Micro-nano aeration systems are respectively provided at the bottom and middle of the reaction tower. The oxygen mass transfer efficiency is improved through a graded cross-flow method, which enhances the decomposition of pollutants in the wastewater and effectively improves the pollutant removal efficiency in the wastewater.