293 results about "Wet oxidation" patented technology

The utility model relates to a sludge treatment device and a sewage sludge co-treatment and resource utilization system, the sludge treatment device comprises a kitchen garbage feeding module, a wet oxidation treatment module and a controller, the kitchen garbage feeding module comprises a storage box and a feeding unit, the storage box comprises a cavity, a first feed port and a first discharge port, and the feeding unit comprises a second feed port and a second discharge port. The first feed port and the first discharge port are respectively communicated with the cavity, the first feed port is used for adding kitchen garbage into the storage box, and the first discharge port is communicated with the charging unit; the wet oxidation treatment module comprises a wet oxidation reaction unit, and the wet oxidation reaction unit is used for performing wet oxidation treatment on a mixture of the sludge and the kitchen garbage to generate a treatment product; the controller is respectively connected with the kitchen garbage feeding module and the wet oxidation treatment module, so that the sludge can be treated, the kitchen garbage can be simultaneously subjected to cooperative treatment, the pressure of kitchen garbage treatment is relieved, and the sludge treatment device is wide in application range.

The utility model specifically discloses an odor wet oxidation treatment device, which comprises: a gas conveying unit, which is used for collecting and conveying odor gas; the wet-type catalytic ozonation unit is communicated with the gas conveying unit and is used for carrying out primary treatment on the malodorous gas so as to remove part of malodorous substances in the malodorous gas; the chemical oxidation unit is communicated with the wet-type catalytic ozonation unit and is used for further treating the malodorous gas subjected to primary treatment so as to remove residual malodorous substances in the malodorous gas; and the gas discharge unit is communicated with the chemical oxidation unit and is used for collecting the purified malodorous gas and discharging the malodorous gas outwards. According to the device, the wet ozone catalysis unit and the chemical oxidation unit are coupled, so that water-soluble and water-insoluble components in the malodorous substances can be effectively treated, and the device is small in occupied area and does not generate hazardous wastes. Therefore, the device has the characteristics of low cost and small pollution, and can better adapt to subsequent treatment of malodorous gas in industrial enterprises.

The invention provides a high-temperature-resistant desulfurization catalyst and a preparation method thereof, and relates to the technical field of catalysis, and the high-temperature-resistant desulfurization catalyst comprises the following components in percentage by weight: 30-35% of cobalt phthalocyanine, 10-15% of Fe-PBTCA-EDTMP, 10-15% of manganese sulfate monohydrate, 10-15% of 2, 3, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 10-15% of 2, 3, 4-trimethyl-1, 3 The cleaning agent is prepared from 5-10% of 1, 4-dinitrophenol, 15-20% of tannin extract, 8-10% of sodium metavanadate, 8-10% of ammonium phosphate and 4-8% of ammonia-ammonium chloride solution. The high-temperature-resistant desulfurization catalyst disclosed by the invention has the advantages of being small in dosage, small in waste liquid discharge, good in regeneration effect, low in corrosion rate, low in operation cost, not easy to block a tower, capable of overcoming hydrogen cyanide poisoning, high-temperature-resistant and not easy to inactivate. In a wet oxidation desulfurization system, the high-temperature-resistant desulfurization catalyst provided by the invention overcomes the defects that a PDS desulfurization catalyst, an MSQ desulfurization catalyst, a vanadium pentoxide + tannin extract catalyst and an ADA catalyst are easy to inactivate and secondary salts in a desulfurization solution are increased quickly when the desulfurization solution is at a high temperature of 70 DEG C. In addition, the high-temperature-resistant desulfurization catalyst overcomes the defects that a complex iron catalyst is high in corrosivity, large in usage amount, prone to tower blockage and the like.

The invention discloses a sectional catalytic wet oxidation sewage treatment device and a treatment method, and aims to solve the technical problem that in the prior art, when sewage is oxidized, introduced oxygen can only be in contact with the surface of the sewage, so that the sewage cannot be quickly oxidized, and the treatment efficiency is relatively low. The device comprises a heating unit and a segmented catalytic reaction unit, wherein the heating unit comprises a heat exchange device and a heating device; the segmented catalytic reaction unit comprises a first catalytic reactor, a first empty tower reactor, a second catalytic reactor and a second empty tower reactor; each of the first catalytic reactor and the second catalytic reactor comprises a base, a filter box is fixedly mounted at the front end of the top of the base, a pump machine is fixedly mounted behind the filter box, and a treatment tank is fixedly mounted at the rear end of the top of the base. The sewage oxidation treatment efficiency is greatly improved.

The invention 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 of: carrying out ion implantation on a piezoelectric functional material, carrying out wet oxidation treatment on the surface of a support substrate, and then cleaning and blow-drying to obtain the piezoelectric single crystal composite film material. Oxygen and nitrogen mixed plasma is used for activating the surfaces of a supporting substrate and a piezoelectric functional material, pre-bonding, standing, nitrogen annealing, thinning and stripping are carried out in a low-vacuum environment, the preparation method is simple in process and low in cost, and the composite film prepared through the method is high in bonding strength, free of damage to a stripping interface and good in bonding performance. And meanwhile, cracking and fragmentation are effectively avoided, the yield is effectively improved, and industrial production is facilitated.

The invention discloses a wet oxidation catalyst as well as a preparation method and application thereof, and belongs to the field of wastewater treatment. Styrene porous microsphere resin is used as a raw material, under the action of a catalyst, polyfunctional aldehyde group small molecules and polyfunctional cyano group small molecules are subjected to a Knoevenagel reaction in an adsorption polymerization mode, the surface of the styrene porous microsphere resin is coated with a layer of conjugated carbon organic porous polymer, and the conjugated carbon organic porous polymer is prepared. Forming conjugated carbon coated porous microsphere resin; then carrying out sulfonation reaction to obtain sulfonic acid group modified conjugated carbon coated porous microsphere resin; and then dipping in a noble metal salt solution to form a resin metal compound, and then filtering, washing and drying to obtain the wet oxidation catalyst. The catalyst can be used for catalytic oxidation degradation of organic wastewater, bisphenol A is used as simulated organic wastewater, and the removal rate of treated bisphenol A is 95% or above.

The invention belongs to the technical field of environment-friendly treatment of high-concentration organic wastewater, and particularly relates to a wet catalytic oxidation treatment process for high-concentration organic wastewater. Wastewater in the wet catalytic oxidation treatment process for the high-concentration organic wastewater is formed by combining a plurality of streams of wastewater. In order to ensure the safety of the wet oxidation process, the combined wastewater is firstly subjected to steam stripping pretreatment to remove light component organic matters therein, then is pressurized and heated, enters a wet oxidation reaction section to remove most of COD therein, is cooled and depressurized after the reaction is finished, and is fed into the existing multi-effect evaporation section; the multi-effect evaporation concentrated solution is returned to the wet oxidation section to continuously remove organic matters, and condensate water enters a subsequent biochemical treatment section. The wet catalytic oxidation treatment process for the high-concentration organic wastewater is wide in application range, high in treatment efficiency, high in oxidation speed and low in secondary pollution.

The invention provides a wet oxidation catalyst and a preparation method thereof, and a method for treating organic amine wastewater generated by reconstituted tobacco processing through catalytic wet oxidation. The wet oxidation catalyst comprises precious metal active components and a cerium oxide carrier, the cerium oxide carrier is of a porous structure, valence states of Ce in the cerium oxide carrier include positive tetravalence states, part of the precious metal active components are dispersed on the inner surface and the outer surface of the cerium oxide carrier, part of the precious metal active components are embedded into a framework of the cerium oxide carrier, and the cerium oxide carrier is of a porous structure. The valence states of the noble metal active component comprise a zero valence state and an oxidation valence state, and the content of the noble metal active component in the wet oxidation catalyst is 0.1-5% by weight. Due to the fact that precious metal ions are embedded into a cerium oxide carrier framework, interaction between cerium oxide and precious metal active components is stronger, the contact area is larger, active oxygen reaction sites can be provided more efficiently, and organic amine nitrogen substances such as nicotine in the reconstituted tobacco processing wastewater can be decomposed.

The invention discloses a preparation method and application of a catalytic wet oxidation catalyst containing rare earth metal, and belongs to the technical field of catalyst preparation and acrylic acid wastewater treatment. According to the present invention, with the method of self-propagating combustion after the metal precursor and the comburent are mixed, the high-stability porous high-entropy oxide as the catalyst carrier can be synthesized in one step, and the noble metal active component loaded heterogeneous catalyst can be further synthesized; the preparation method is simple, the yield is high, the thermal stability and chemical stability are good, the porous structure is rich, and meanwhile lattice distortion, structural defects and electronic effects caused by the unique high-entropy effect are achieved. When the catalyst prepared by the method provided by the invention is used for treating acrylic acid wastewater, the service life of the catalyst can be remarkably prolonged, and the degradation effect of organic matters in the wastewater is improved.

The invention discloses a wastewater treatment method based on improved wet oxidation reaction, which comprises the following steps: step 1, carrying out tempering modification treatment on wastewater, and preheating by adopting a multi-stage heat exchanger; 2, introducing the preheated wastewater and an oxidizing agent into a wet oxidation tower filled with a solid catalyst, and gradually heating to a required reaction temperature to carry out a wet oxidation reaction; 3, carrying out gas-liquid separation on a gas-liquid mixture flowing out of the wet oxidation tower, feeding the separated gas phase and liquid phase into the multi-stage heat exchanger in the step 1, carrying out heat exchange with the wastewater in the step 1, and preheating the wastewater to raise the temperature; and step 4, separating the cooled gas phase and liquid phase again, feeding the separated gas phase into the wastewater in the step 1 to carry out tempering modification on the wastewater, and further carrying out deep treatment or discharging the separated liquid phase. The method can effectively degrade organic pollutants in wastewater, and is low in energy consumption and operation cost and stable in process operation.

The invention relates to the technical field of sludge treatment, and discloses a sludge treatment method based on sludge reduction and ammonia nitrogen recovery, which comprises the following steps: 1) alkali thermal hydrolysis: adding alkali into sludge to adjust the pH value to 9-11, and carrying out thermal hydrolysis reaction; (2) wet oxidation: heating after reaction and discharging, and carrying out wet oxidation reaction; (3) flash evaporation: carrying out heat recovery after reaction discharging, and carrying out flash evaporation to obtain a sludge mixed solution and flash evaporation steam; (4) dewatering: performing heat recovery on the sludge mixed solution, and then dewatering to obtain a sludge cake and filtrate; and (5) ammonia nitrogen air stripping: carrying out ammonia nitrogen air stripping on the filtrate by adopting steam, wherein the filtrate after air stripping can be reused as a carbon source for sewage treatment. According to the method, the oxidative degradation efficiency of the sludge is improved through coupling of alkali thermal hydrolysis and wet oxidation treatment, ammonia nitrogen recovery and sludge reduction are facilitated, and the filtrate has the characteristics of high COD and low total nitrogen and is more suitable for being used as a carbon source.

The invention discloses a thiophanate-methyl production wastewater treatment method, and belongs to the technical field of pesticide wastewater treatment.The thiophanate-methyl production wastewater treatment method comprises the following steps that S1, copper sulfate pentahydrate is added into thiophanate-methyl production wastewater, then the mixture is introduced into a catalytic wet oxidation kettle for a reaction, and treatment liquid I is obtained; s2, adding a modified catalyst into the treating fluid I, and performing photocatalysis to obtain treating fluid II; and S3, carrying out three-stage membrane distillation treatment on the treatment liquid II to obtain a treatment liquid III, thereby completing the treatment. According to the method, the COD and ammonia nitrogen concentration in the production wastewater is remarkably reduced, and the COD and ammonia nitrogen removal rate is increased.

The invention relates to an efficient sludge treatment process, which mainly comprises a defibering and size mixing pretreatment device, a low-temperature damp and hot coalification system, a sewage pretreatment and detection feedback system, a wet oxidation system, a wet oxidation steam regeneration system, a wet oxidation pressure-stabilizing exhaust system, a sewage treatment system and a waste gas treatment system. All devices and systems of the process are coordinated for treatment, organic energy of the sludge and the organic wet garbage slurry is fully utilized and converted into heat to be used by the process, and a product is a coal compound, has a high heat value and is used as fuel. And the efficient treatment effects of reduction, harmlessness and recycling are achieved.

The invention discloses a magnetic iron oxide catalyst for wet catalytic oxidation of sludge and a preparation method of the magnetic iron oxide catalyst, and belongs to the field of preparation of catalyst materials. The method specifically comprises the following steps: dissolving a trivalent iron salt and a divalent iron salt in water in proportion to obtain a mixed solution; under the protection atmosphere of inert gas, adding an alkaline solution into the mixed solution, and adjusting the pH value to be 8-12; sequentially washing off impurities by using water and an organic detergent to obtain a reactant; and carrying out vacuum drying on the reactant, and grinding to obtain the magnetic iron oxide catalyst. The catalyst can effectively reduce the content of organic substances in the sludge pyrolysis liquid in the catalytic wet oxidation process, and has good magnetism and recoverability before and after the reaction. After five times of circulation, the catalyst still keeps a stable organic matter removal effect and good magnetism. The method is expected to be applied to the fields of sludge resource utilization, environmental water pollutant removal and the like.

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 utility model provides a wet oxidation treatment system for sludge. The wet oxidation treatment system for the sludge comprises a mixing tank, a heat exchange device, a reactor, a gas-liquid separator and a reflux device, the mixing tank, the heat exchange device, the reactor and the gas-liquid separator are sequentially connected through pipelines, and the backflow device is connected between the gas-liquid separator and the mixing tank and used for enabling part of products to flow back into the mixing tank; high-pressure gas is introduced into the heat exchange device; a partition plate and a cleaning device are arranged; the reactor outlet is provided with a self-control valve. The sludge concentration of the mixing tank is reduced through sludge backflow; high-pressure gas is introduced through the heat exchanger to enhance sludge stirring, a partition plate is arranged through the heat exchanger to increase the sludge flowing speed, and accumulated sludge is cleaned by arranging a cleaning device; and the system pressure is stabilized through the self-control valve. The measures can effectively improve the fluidity of the sludge, avoid sludge deposition and improve the heat exchange effect, the sludge treatment effect is good, meanwhile, the system is stable in operation, and the operation cycle is prolonged.

The invention relates to the field of sponge materials, and provides a flame-retardant sponge material as well as a preparation method and application thereof. The flame-retardant flame-retardant coating is prepared from the following components: phosphorus-based flame retardant modified oxidized feather-shaped carbon nanotubes, phosphorus-containing diol modified silicon dioxide aerogel, polyurethane, aluminum hydroxide, ammonium tripolyphosphate, toluene diisocyanate, deionized water, cyclopentane, triethanolamine, dibutyltin dilaurate, epoxidized soybean oil, talcum powder, an antioxidant, a light stabilizer, pigment and antimony trioxide. The composite material is prepared from expanded graphite, a silicone oil surfactant, an isothiazolinone antibacterial agent and a phosphorus-based flame retardant modified oxidized feather-shaped carbon nanotube through wet oxidation and dimethyl methylphosphonate modification, and phosphorus-containing diol is prepared from diethyl phosphite, diethanol amine and paraformaldehyde through condensation. The sponge disclosed by the invention has excellent mechanical and flame-retardant properties, and is widely applied to the fields of buildings, home furnishing and transportation.

The invention discloses an efficient salt elimination three-dimensional porous solar evaporator and preparation and application thereof. The evaporator is in an inverted cone shape. The evaporator comprises an efficient salt elimination porous foamy copper framework and a water supply layer attached to the outer side of the efficient salt elimination porous foamy copper framework; the efficient salt elimination porous foamy copper framework is a porous foamy copper framework which is sequentially subjected to alkaline solution wet oxidation treatment, graphene oxide deposition treatment and sodium polystyrenesulfonate soaking treatment. According to the efficient salt elimination three-dimensional porous solar evaporator, wet oxidation treatment of the alkaline solution brings super hydrophilicity to the evaporator, and evaporation enthalpy of water is reduced; the deposited graphene oxide can realize broadband light absorption, and provides a space for vapor diffusion and diffuse reflection of incident light in the porous skeleton; the evaporation area of water is enlarged through the inverted cone structure and the stacked framework; sO3 ionized from sodium polystyrenesulfonate is beneficial to repelling salt ions in main water, precipitation of salt crystals on the surface of the evaporator is reduced, and the application prospect is good.

The utility model relates to a treatment device for wet oxidation produced water of caprolactam wastewater. The treatment device comprises a produced water collection tank, a membrane filtration device, an electrolysis device, a macroporous adsorption resin column and a chelating adsorption resin column, a water outlet of the produced water collecting tank is connected with a water inlet of the membrane filtering device; a concentrated water outlet of the membrane filtration device is connected with a water inlet of the electrolysis device; a water outlet of the electrolysis device is connected with a lower water inlet of the macroporous resin column; the upper water outlet of the macroporous resin column is connected with the lower water inlet of the chelating resin column. The device disclosed by the utility model is simple in structure, large in treatment capacity, high in removal rate of COD (Chemical Oxygen Demand), environment-friendly, safe, reliable, low in cost and suitable for industrial production, and catalyst metal ions and ammonium sulfate are recycled, and no additional by-products and three wastes are generated.

The invention belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment reaction tower which comprises a tower body, two feeding holes are formed in the end part of the tower body; two first connecting pipes are fixedly connected to the inner part of the tower body and positioned below the feeding hole; a first servo motor is fixedly connected to the position, located between the two first connecting pipes, in the tower body. The filter disc rotates along with the output end of the first servo motor, after the filter screens at the filter holes are blocked, the filter screens of the other filter holes are switched in time for continuous use, and the filter screens made of different materials can be arranged in the filter holes, so that the subsequent wet oxidation reaction effect on sewage is improved; the wet oxidation box is fixed to the bottom of the tower body to collect treated sewage, the effect of wet oxidation reaction on the sewage is achieved, a plurality of stirring blades extend into filtering holes to stir, and the situation that a filter screen is blocked by accumulated sludge in the filtering holes is reduced.

The invention relates to a treatment device and method for wet oxidation produced water of caprolactam wastewater. The treatment device comprises a produced water collection tank, a membrane filtration device, an electrolysis device, a macroporous adsorption resin column and a chelating adsorption resin column. The treatment method comprises the following steps: (1) adjusting the pH value of the wet oxidation produced water of the caprolactam wastewater, and then carrying out membrane filtration concentration; (2) carrying out electrolytic treatment on the obtained concentrated water; (3) carrying out resin adsorption on the obtained electrolysis wastewater; and (4) carrying out advanced treatment on the obtained adsorption wastewater. The device disclosed by the invention is simple in structure, large in treatment capacity, free of additional byproducts and three wastes, green, environment-friendly, safe and reliable. The method is simple in process, high in COD removal rate, high in catalyst metal ion and ammonium sulfate recovery rate, high in ammonium sulfate purity and good in fresh water biodegradability, solves the problem of membrane pollution of a membrane filtration device caused by high-concentration metal ions in wastewater, improves the efficiency of an electrolysis device, is low in cost and is suitable for industrial production.

The invention discloses a resourceful treatment system and a resourceful treatment method for high-salt organic wastewater. The treatment method comprises the following steps: sequentially carrying out membrane catalytic ozonation reaction, nanofiltration membrane filtration, catalytic wet oxidation reaction and chelate resin adsorption treatment on the high-salt organic wastewater. According to the method, macromolecular organic matters in the wastewater are reduced through membrane catalytic ozonation, then residual organic matters are concentrated and separated through a nanofiltration membrane device, and the organic matters in the wastewater are further thoroughly decomposed into carbon dioxide and water through catalytic wet oxidation. Compared with a single oxidation process, the treatment efficiency and the treatment effect of the wastewater are improved through coupling and cooperation of membrane catalytic ozone oxidation and catalytic wet oxidation. The catalytic wet oxidation device is adopted to further treat concentrated water concentrated and separated after membrane catalytic ozonation, so that the treatment load of catalytic wet oxidation equipment is reduced, and meanwhile, the volume of a catalytic wet oxidation reactor can be reduced, so that the equipment investment cost is reduced.

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 provides a high-concentration organic wastewater treatment and energy recovery system, and relates to the technical field of wastewater treatment.The high-concentration organic wastewater treatment and energy recovery system comprises an air floatation tower, a wet oxidation reactor, a gas-liquid separator, a wastewater anaerobic tower and a gas-fired boiler, and the first output end of the air floatation tower is connected with the first input end of the wet oxidation reactor; the output end of the wet oxidation reactor is connected with the input end of the gas-liquid separator through the heat exchange assembly, the first output end of the gas-liquid separator is connected with the input end of the wastewater anaerobic tower, the first output end of the wastewater anaerobic tower is connected with the first input end of the gas-fired boiler, and the first output end of the gas-fired boiler is connected with the steam pipeline. In the invention, the pressurized wastewater separated by the gas-liquid separator flows into the wastewater anaerobic tower through the first output end of the gas-liquid separator, and the mixing and stirring of the wastewater in the wastewater anaerobic tower can be promoted by using the wastewater pressure, so that the wastewater pressure energy is fully utilized, the effective recovery of the wastewater pressure energy is realized, and the treatment energy consumption is further reduced; and the operation cost is saved.

The embodiment of the invention discloses a feeding system and method for a wet oxidation treatment process, and the system comprises a material feeding tank, a normal-pressure feeding pump set which is used for pumping a to-be-treated material into the material feeding tank, a pressurization system which is used for filling the material feeding tank with gas, and a feeding pump set which is used for pumping the to-be-treated material into the material feeding tank, and the pressure relief system is used for discharging redundant gas in the material feeding tank. The process is simple, the material feeding tank with the normal pressure and high pressure seamless switching function is ingeniously integrated at the front end of the wet catalytic oxidation treatment process, it is ensured that raw materials are stably and efficiently supplied to the pressurized reactor / kettle, the safety and flexibility of the whole treatment process are improved, and the production cost is reduced. In the feeding link, the dependence of a traditional process on a high-pressure pump is thoroughly eliminated, the initial equipment investment cost is greatly reduced, the problem that the feeding pump is frequently overhauled due to abrasion is effectively relieved by reducing direct pumping of materials in a high-pressure environment, and the maintenance frequency and the maintenance cost are greatly reduced.

The invention discloses a method for determining carbon isotopes of low-concentration soluble organic carbon in a water body, and belongs to the technical field of organic carbon detection. The determination method comprises the following steps: combining a TOC analyzer and a stable isotope mass spectrometer, and converting DOC in a water body into CO2 gas by adopting the TOC analyzer; cO2 gas generated by the TOC analyzer is enriched for the first time through the cold trap T1; the CO2 gas frozen by the cold trap T1 is enriched for the second time through a cold trap T2; introducing the CO2 subjected to secondary enrichment into a stable isotope mass spectrometer, and determining the carbon isotope composition of the CO2. Aiming at a low-concentration DOC water body, the carbon isotope composition of DOC in the water body is determined on the basis of combination of a wet oxidation technology and stable isotope mass spectrometry detection, a wet oxidation method is used for increasing the volume of a water sample to generate more CO2 for stable isotope mass spectrometry determination, so that more accurate carbon isotope composition is obtained, and the method is efficient, time-saving, labor-saving and accurate.

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 invention provides an integrated circuit cleaning wastewater treatment system and method. The system comprises a rectification device, a comprehensive wet oxidation module, a fine separation module and related pipelines. The wastewater pipeline conveys cleaning wastewater to the rectification device for pretreatment to obtain light component liquid and residual concentrated liquid, and the light component liquid and the residual concentrated liquid are conveyed through the light component discharge pipeline and the concentrated liquid discharge pipeline respectively. The light component liquid is sent to a fine separation module for separation and purification; the residual concentrated liquid is sent to a comprehensive wet oxidation module, is heated by a preheater and then enters a wet oxidation reactor to generate a high-temperature gas-liquid mixture, and the residual heat is used for a steam generator to convert deionized water into steam, so that energy storage is realized. Steam provides heat energy for the fine separation module and the rectification device through a branch pipeline, and a high-temperature gas-liquid mixture returns to the preheater through a mixed liquid pipeline to be cooled and is finally conveyed to the multifunctional tower through a feeding pipeline to be subjected to gas-liquid separation. The whole system not only realizes effective recycling of resources, but also improves energy circulation, mass transfer efficiency and the like.

The application provides a catalyst for catalytic wet oxidation of tetrabromobisphenol A wastewater, a preparation method and application thereof, and belongs to the technical field of wastewater treatment. The catalyst comprises a main metal oxide and a crystal lattice adjusting metal oxide; the main metal oxide comprises one or more of MnO2, Co3O4, NiO or MoO3, and the crystal lattice adjusting metal oxide comprises an oxide of Ce and / or an oxide of La. The preparation method comprises the following steps: adding main metal salt, crystal lattice adjusting metal salt and citric acid into water, evaporating and concentrating, drying, first calcining, adding sodium hydroxide into water to perform a closed pressurized reaction, washing and drying, second calcining, placing into a nitric acid solution, heat treatment, washing and drying, placing into water with hydrogen peroxide and acetic acid to perform a heat reaction, filtering and drying, and obtaining the catalyst. The catalyst introduces a large number of oxygen defects through a mode of "lattice doping - partial metal removal - lattice distortion", so that the catalyst has a large oxygen storage capacity, can activate the C-Br bond, and can efficiently catalyze the oxidation of tetrabromobisphenol A wastewater.

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.