196results about How to "Improve ozone utilization" patented technology

The invention relates to a combined treatment method of oil-refining wastewater containing naphthenic acid. The combined treatment method of the oil-refining wastewater containing naphthenic acid is characterized in that a pre-treatment technology is added at the front end of an 'anoxic/oxic' ('A/O') step of an oil removing + A/O process, and an advanced treatment process is added at the back end of the 'A/O' step. Air-floatation oil removing effluent enters a modified biological aerated filter to be pre-treated, a filler is subjected to modification treatment, and the combined treatment method adopts upstream continuous operation. Hydraulic loading is controlled in a range of 1.0-3.0 m<3>/m<2>-h, the temperature is controlled in a range of 25-35 DEG C, the reflux ratio is controlled to be 100-150%, the gas-water ratio is controlled to be 3:1-5:1, and an automatic back washing period is controlled to be 48-72 hours. The effluent of the modified biological aerated filter is subjected to treatment of an 'A/O' biochemical system, enters an intermediate reaction tank and then enters a pre-mixing tower in parallel. The effluent of the pre-mixing tower enters a catalytic oxidation tower to quickly oxidize difficultly-biodegradable organic matter in sewage and reduce chemical oxygen demand (COD) of the sewage, and finally treated effluent enters a clean water pond.

The invention belongs to the technical field of nitrobenzene class wastewater treatment and in particular relates to a process method for advanced oxidation and degradation of nitrobenzene class wastewater. The invention solves the problem that the prior method for degrading nitrobenzene class wastewater has long time consumption and high cost. The method comprises that: wastewater and ozone undergo full haptoreaction in gas-liquid mass transfer equipment; after the haptoreaction, the wastewater enters a coupling reactor consisting of an ultrasonic wave field and an electrolysis field; and nitrobenzene class substances in the wastewater are degraded under the synergistic action of ultrasonic wave and micro-electrolysis. The device comprises the gas-liquid mass transfer equipment; a gas inlet of the gas-liquid mass transfer equipment is connected with an ozone generator; a liquid inlet of the gas-liquid mass transfer equipment is connected with a nitrobenzene class wastewater pool; a liquid outlet of the gas-liquid mass transfer equipment is connected with the wastewater coupling reactor; and the bottom of the wastewater coupling reactor is provided with an ultrasonic wave generator. The process method has the following advantages: the process method has simple process flow and convenient operation, farthest reduces treatment cost and can be applied to various organic industrial wastewater such as phenol-containing wastewater, detonator wastewater, dye wastewater, wastewater in a petrochemical enterprise, detergent wastewater and the like.

The invention discloses a wastewater treatment catalytic ozonation reactor for a fluidized bed. The wastewater treatment catalytic ozonation reactor for the fluidized bed comprises a reactor housing, wherein an external cylinder is arranged in the housing, an internal cylinder is arranged in the external cylinder, the top part of the internal cylinder is lower than that of the external cylinder, the bottom of the internal cylinder is lower than that of the external cylinder; a baffling channel is formed between the bottom of the external cylinder and the inner wall of the housing, a refluxing channel is formed between the bottom of the internal cylinder and the inner wall of the external cylinder. According to the wastewater treatment catalytic ozonation reactor for the fluidized bed disclosed by the invention, a catalytic reaction region, a diversion region and a precipitation region can be arranged in the same reactor so as to realize integration without needing additional catalyst separation and back conveying equipment. The invention also discloses a wastewater treatment method with application of the wastewater treatment catalytic ozonation reactor. According to the wastewater treatment method disclosed by the invention, by virtue of wastewater refluxing, residual soluble ozone in wastewater is fully utilized, and the ozone utilization ratio and the wastewater treatment depth are greatly increased.

The invention belongs to the technical field of nitrobenzene wastewater, in particular relates to a method and device for adsorbing, reducing, oxidizing and degrading nitrobenzene wastewater, and solves the problem of the existing method for degrading nitrobenzene wastewater. The method comprises the following steps of performing a reduction reaction on nitrobenzene wastewater in a micro-electrolysis bath; performing a sufficient contact reaction with ozone in gas-liquid reaction equipment; further degrading pollutants in the wastewater in the gas-liquid reaction equipment; and circularly treating the wastewater in the micro-electrolysis bath and the gas-liquid reaction equipment. The device comprises a rotary packed bed device, wherein a gas inlet is connected with an ozone generator; and a liquid inlet and a liquid outlet are connected with the micro-electrolysis bath. The method and the device have the beneficial effects that the process flow is simple and convenient to operate; the advantages of various technologies are given a full play by coupling the three technologies to reach the aim of treating waste by using waste, so that the treatment cost can be furthest reduced.

The invention discloses a preparation method of natural benzaldehyde. The method comprises the following steps of: getting cinnamyl aldehyde or cinnamon oil as a raw material; adding one or more of multi-phase catalysts of 0.5% to 10% of MnO2, TiO2, Al2O3, SnO2, Fe2O3, MgO, CuO, CeO2, ZrO2, Bi2O3, Y2O3 or active carbon; pouring 0.05 to 0.5g of ozone in a bubbling reactor at -5 to 20 DEG C based on 1g of cinnamyl aldehyde per hour; carrying out an ozonization reaction for 0.5 to 10 hours to obtain an ozonide intermediate; dropping the ozonide intermediate into the thiourea aqueous solution to be reduced while agitating at a constant low temperature, so as to obtain an oil-water mixture; separating the oil from the water to obtain a rough benzaldehyde product; and finally operating a molecular distillation device to obtain the benzaldehyde with relatively high purity. The preparation method has the advantages of simple technology, green reaction, being capable of remaining the natural property of the benzaldehyde, high selectivity, and high yield of the benzaldehyde.

The invention relates to a coking wastewater deep treatment system combing ozone catalytic oxidation and electro-adsorption and belongs to the technical field of coking wastewater treatment. The system comprises an ozone catalytic oxidation reactor, an ozone generator, an oxygen tank, a gas-liquid separator, a filter, an electro-adsorption device, a recycling water tank, a concentrated water tank, a water generating electromagnetic valve, a concentrated water electromagnetic valve and a connection pipeline; an outlet of coking wastewater is sequentially connected with the ozone catalytic oxidation reactor, the gas-liquid separator, the filter and the electro-adsorption device, and a water outlet of the electro-adsorption device is connected with the recycling water tank through the water generating electromagnetic valve and meanwhile connected with the concentrated water tank through the concentrated water electromagnetic valve; an inlet of the ozone generator is connected with the oxygen tank, and an outlet of the ozone generator is connected with a gas inlet of the ozone catalytic oxidation reactor; the ozone catalytic oxidation reactor is connected with a direct current power source. According to the coking wastewater deep treatment system, coking wastewater deep treatment and recycling can be achieved by combining ozone catalytic oxidation and electro-adsorption, and up-to-standard release of concentrated water is further guaranteed.

The invention relates to a method for treating oil field drilling waste water, which comprises the following major steps: A) adding activated carbon and ferric trichloride, ferric sulfate or other ferric salt to oil field drilling waste water, and introducing ozone to perform a catalytic ozonization reaction; and B) after ozonization, adding polyacrylamide flocculant to the outlet water to enablethe activated carbon and ferric hydroxide to be subject to coagulative precipitation, and separating the water and precipitates. By using the method provided by the invention, the COD (Chemical Oxygen Demand) (2000-10000mg/L) removal rate of the oil field drilling waste water can be increased from 10% or so to 50-70% by ozone oxidation.

The invention discloses a method for removing cyanide, thiocyanate, COD and arsenic in waste liquid, comprising the following steps: the cyanide, the thiocyanate, the COD and the arsenic in the waste liquid are deeply treated by utilizing ozonized gas, a mode with continuous treatment and direct discharge can be adopted, also a mode with batch treatment and intermittent discharge can be adopted, and the implementation process of the method is easy to control; in the range of the pH value with sectioned control, the generation concentration and mass velocity of ozone do not need to be required strictly, the problem that single technology can not treat the cyanide, the thiocyanate, the COD and the arsenic in the waste liquid deeply can be solved, the cost and the operation complexity of technological equipment are reduced, and the environmental pollution is reduced; solid suspensions (SS) in the treated waste liquid is removed by settlement, and clear liquor is directly discharged outwards or returned to the upstream technology for repeated use; the contents of pollutants in the treated waste liquid are stable, the total content of the cyanide is less than 0.2mg/L(waste water); the content of the thiocyanate is less than 5mg/L(waste water); the total content of the COD is less than 30mg/L; the total content of the arsenic is less than 0.5mg/L(waste water), and no secondary pollutants are generated in the reaction process.

The invention provides a method and device for treating oil refining salt-containing sewage by using an oil refining waste catalyst and ozone. According to the method, the oil refining salt-containing sewage is subjected to catalytic oxidation treatment of internal circulation in a fluidized bed reactor by using ozone-containing gas and an activated oil refining waste catalyst, and the treated sewage flows through a vertical sedimentation basin and then is discharged outwards, wherein the CODcr (chemical oxygen demand) value of the effluent satisfies the primary standard A of Chinese Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). The device is used for implementing the method, and at least comprises a fluidized bed reactor and a vertical sedimentation basin. According to the method and the device disclosed by the invention, the oil refining waste catalyst is used as a sewage ozone treatment cooperating catalyst, so that a utilization direction of 'waste control by waste' is provided for solid wastes of oil refining plants, and the problem of relatively high cost of a catalyst is solved; and the mass transfer effect among ozone, a catalyst and organic pollutants is strengthened by using a fluidization technology, and the problems that the utilization rate of ozone is relatively low and the catalyst is easy to scale are solved.

The process of bleaching gauze with ozone water includes: compounding ozone water through introducing weak acid water solution into a barrel and adding surfactant; bleaching gauze after being enzyme scoured, alkali washed and water washed with ozone water in a bleaching kettle, and washing bleached gauze with cold water and hot water. During the bleaching process, ozone water is circulated between the bleaching kettle and the compounding barrel, and ozone is introduced into the compounding barrel to maintain the concentration of the ozone water. The process can bleach gauze homogeneously and the bleached gauze can reach whiteness over 90 %.

The invention relates to an ozone oxidation-air floatation combined treatment system and a process. The system comprises a reaction tank, a gas liquid mixer, a catalyst adding device and a whirl stream air floating tank. Ozone-containing gas and sewage are mixed into a gas-liquid mixture containing micro bubbles by the gas liquid mixer and then fed into the reaction tank. The reaction tank is provided with at least one ultrasonic wave cavitation device. The catalyst adding device is used for feeding a catalyst, ozone and the sewage into the reaction tank together. Then a catalytic oxidation reaction is performed under the action of ultrasonic wave cavitation. A stream guide pipe is vertically disposed in the center of the whirl stream air floating tank. The upper end of the stream guide pipe is open, and the lower end of the stream guide pipe penetrates the bottom of the whirl stream air floating tank. The bottom of the whirl stream air floating tank is also provided with a sewage outlet. The bottom of the stream guide pipe is provided with vortex plates. The whirl stream air floating tank is communicated with the reaction tank, and used for allowing the gas liquid mixture reacted in the reaction tank to react continuously under the whirl stream function and to be subjected to floatation, washing and separation treatment. The contact probability of the micro bubbles generated by the system with contaminants is large, the reaction is more thorough, the ozone utilization rate is high, retention time is short, and contaminant removing effects are good.

The invention discloses a method and a device for purifying VOCs (Volatile Organic Compounds) through gas-phase photolysis and liquid-phase photocatalytic oxidation. The method comprises the following steps: S1, gas-phase photolysis: irradiating the VOCs under an UV (Ultraviolet)-light condition, enabling the photolysis time to be less than 1s, generating ozone by reaction, and forming a mixed gas by the ozone and a residual gas after photolysis; S2, liquid-phase photocatalysis: carrying out reverse gas-liquid contact on the mixed gas obtained in S1 and catalyst slurry, enabling the mixed gas to fully react with the catalyst slurry, and enabling the mixed gas to be converted into CO2 and H2O. According to the method for purifying the VOCs through the gas-phase photolysis and the liquid-phase photocatalytic oxidation, disclosed by the invention, the gas-phase photolysis and the liquid-phase photocatalytic oxidation are effectively combined, and the two steps influence each other, work together and cannot be divided; the problems of catalyst deactivation and low liquid-phase absorption efficiency of the VOCs due to deposition of an intermediate product on a gas-solid catalytic surface are fundamentally solved; through a synergistic effect of multiple processes of high-energy ultraviolet photolysis, the liquid-phase photocatalysis, ozone catalytic oxidation and the like, the generation and the deposition of the intermediate product are reduced, and efficient and stable degradation of organic waste gas is realized.

The invention discloses a method for multiphase catalytic ozone treatment of residual activated sludge, wherein the method comprises the steps: (1) adding an ozone catalyst into a sludge concentration tank, wherein the ozone catalyst comprises a carrier and active metal components loaded on the carrier, a transition metal and a rare earth metal are used as the active metal components, the transition metal is selected from non-noble metals of fourth and fifth periods of the periodic table of elements, the carrier takes 150-300 mesh activated carbon as a core and amorphous alumina as a shell, the amount of the activated carbon accounts for 10%-70% of the weight of the carrier, and the amount of alumina accounts for 30%-90% of the weight of the carrier; (2) introducing ozone into the sludge concentration tank of the step (1), and making the sludge decomposed; and (3) carrying out solid-liquid separation of the sludge after treatment in the step (2), and removing water. By adding the ozone catalyst into the conventional sludge concentration tank, uniform mixing is performed, then ozone is introduced, organic matters in the sludge can be quickly destroyed and decomposed, and the sludge quality and volume are effectively reduced; and the method is economical and practical, and easy to operate and manage, and has no secondary pollution.

The invention relates to a dyeing wastewater advanced treatment method and device by using ozone, oxydol and activated carbon. The method comprises the following steps: floatation effluent water passes through a fiber rotary table filter tank to remove suspended substances and enters a quick mixing tank, H2O2 is added into the quick mixing tank, the effluent water enters an ozone contact tank, H2O2 and O3 are simultaneously added into the tank to degrade nondegradable organic matters, the effluent water enters an activated carbon filter tank, and ozone is added into the activated carbon filter tank; the effluent water of the activated carbon filter tank enters a filter tank effluent water storage tank, and is discharged by a pump; and by using the filter tank effluent water storage tank as a back flushing water tank, back flushing wastewater is discharged into the activated carbon filter tank to perform back flushing on a wastewater recovery tank. By using the H2O2 and the activated carbon which carries the Fe2O3-CuO-MnO2-CeO2 catalyst and adding the ozone in different stages, the method has the characteristics of high catalytic efficiency, high ozone utilization ratio, favorable COD (chemical oxygen demand) removal effect, low cost and the like, so that the device has the characteristics of high treatment efficiency, high economy, high stability, high reliability, low carbon and environment friendliness.

The invention belongs to the technical field of nitrobenzene wastewater treatment and particularly discloses a method for catalytic ozonization treatment of acidic nitrobenzene wastewater. The problems that in the prior art, the utilization rate of ozone under an acidic condition is low, Fe2+ is poor in stability and prone to be oxidized into Fe3+, the activity of a catalyst is greatly lowered, and generated Fe3+ is prone to flocculation in water to cause equipment blockage are solved. A rotating packed bed is used as a gas absorption and reaction device; the acidic nitrobenzene wastewater in which Mn2+ and H2O2 are dissolved, and ozone containing gas are introduced into the rotating packed bed simultaneously; the pH of the acidic nitrobenzene wastewater is regulated to range from 1 to 5 before the acidic nitrobenzene wastewater is pumped into the rotating packed bed. By means of the method, RPB-O3/H2O2 can generate a large quantity of hydroxyl free radicals under the acidic condition, and the acidic nitrobenzene wastewater can be removed efficiently.

The invention discloses a preparation method of a metal loaded catalyst with aluminum silicate as a carrier. The preparation method comprises steps as follows: kaolin powder, aluminum hydroxide powder, metal ion active components and a pore forming agent are sufficiently mixed by a stirring machine, the mixed components are conveyed to a sugarcoating machine and sprayed with an adhesive, and the mixed powder is made into shaping catalyst precursors with the particle size being 2-4 mm and then subjected to drying, preheating, constant high-temperature roasting and natural cooling. The preparation method has the characteristics that the preparation method is simple, safe and environment-friendly and raw materials are easy to obtain; during sewage deep treatment, the catalyst increases the utilization rate of ozone in the application of an ozone catalytic oxidation technique, shortens the retention time of the process and also has very high oxidation efficiency when used for treating certain sewage with high salt content, such as reverse osmosis bimodal concentrated water, papermaking wastewater, printing and dyeing wastewater and oil production wastewater.

The invention belongs to the technical field of catalysts, particularly relates to an ozonation catalyst for wastewater treatment and aims to provide a loaded ozonation catalyst having the advantages of high pollutant removal rate, high catalytic activity, zero secondary pollution and little active ingredient loss and a preparation method and application thereof. The loaded ozonation catalyst uses gamma-alumina as a carrier and SnO2 and TiO2 as active components. The preparation method includes five processes: carrier particle pretreatment, gel solution preparation, impregnation, calcining and repeated treatment. The loaded ozonation catalyst can be used for ozonation treatment of antibiotic wastewater like chloromycetin wastewater, penicillin wastewater, erythromycin wastewater, streptomycin wastewater, vancomycin wastewater and pipemidic acid wastewater and has the advantages of high removal efficiency, high ozone utilization rate and needlessness of external adding of agents.

The invention belongs to the technical field of catalysts and especially relates to a preparation method for an efficient load type ozone oxidation catalyst. The preparation method for the efficient load type ozone oxidation catalyst provided by the invention comprises five processes of preparing a titanium sol solution, preparing a template agent sol solution, preparing a mesoporous titanium dioxide molecular sieve precursor, de-molding the mesoporous titanium dioxide molecular sieve precursor and loading a MnO2 active component. According to the invention, a self-prepared mesoporous titanium dioxide molecular sieve is used as a carrier, a Mn metallic oxide catalyst is loaded into an inner pore structure of a titanium molecular sieve, the molecular sieve is composed of active components, the content of the active components in the catalyst material is ultrahigh, the removal rate of the pollutants is high, the catalytic activity is high, the active component loss is less and the catalyst has an obvious catalytic effect in ozone oxidation treatment for antibiotic wastewater, such as, chloramphenicol wastewater, penicillin wastewater, erythrocin wastewater, streptomycin wastewater, vancomycin wastewater and pipemidic acid wastewater.

The invention provides a catalyst used for removing dioxins and NO<x> in flue gas. TiO2 is taken as a carrier, an active component is dispersed on the surface of the carrier; the active component is composed of MnO<x> and CeO2. The invention also provides a preparation method of the catalyst used for removing dioxins and NO<x> in flue gas, and a method used for removing dioxins and NO<x> in flue gas with the catalyst. According to the method, flue gas is subjected to dust removing using a dust removing device, is conveyed into a device containing the catalyst through a pipeline, ozone is sprayed into the device through another pipeline provided with a plurality of small spray holes, flue gas, ozone, and the catalyst are mixed fully in the device, and after removing of dioxins and NO<x>, the flue gas is discharged. According to the method, ozone and the manganese containing catalyst are combined for cooperative removing of dioxins and NO<x>.

The invention relates to an efficient stokerfeed boiler ozonation desulfurization and denitrification integrated process system. The system mainly comprises a flue gas system, an air source oxygen generation system, an oxygen storage and supply system, an ozone generation system, a recirculating cooling water system, an ozone injection system, an absorption tower system, a process water system, a compressed air system, a magnesium oxide method flue gas desulphurization system, a gas flow measuring system, a high-low pressure distribution and control system and the like. According to the efficient stokerfeed boiler ozonation desulfurization and denitrification integrated process system, the ozonation oxidation technology is utilized for flue gas denitrification, the strong oxidizing property of ozone is utilized for oxidizing a water-insoluble nitric oxide in flue gas into freely-soluble N2O5 and other gas and absorption is performed through a follow-up absorbing device. The technology has the advantage of being high in flue gas adaptability and can remove flue gas containing high dust content, the denitrification efficiency can reach 95%, and meanwhile the denitrification efficiency can be adjusted according to on-site requirements.