329 results about "Catalytic ozone" patented technology

The invention discloses a catalytical ozonization catalyst prepared by utilizing multi-source sludge and an application thereof, and establishes a method for preparing a sludge group active carbon catalyst for catalytical ozone oxidation organic industrial waste water. The method comprises the following steps of: utilizing multi-source sludge such as surplus sludge generated by urban sewage factory biochemical treatment and a metal sludge generated by a Fenton oxidation method, preparing a skeleton which is a sludge group active carbon through steps such as organic substance adding, actification, dehydration, drying, mixing, roasting and screening, wherein a surface layer contains a solid catalyst of metallic oxide, and the ratio of the sludge group active carbon and the metallic oxide in parts by weight is 1:(0.3-0.5). The catalyst is used for catalyzing ozone oxidation treatment organic industrial waste water and has higher catalytic activity and stability, the processing range is wide, the realization and popularization and application are easy, and the economic benefits are improved in an organic industrial waste water processing procedure.

The invention relates to water deep treatment technology of heterogeneous catalytic ozonation depollution. With the combination of catalytic ozonation depollution technology with membrane filtration technology, a novel, high-efficient, and economical catalytic ozonation water deep treatment technology is provided, which combines the advantages of the two technologies, overcomes their disadvantages, effectively improves the ozone utilization rate and the ozone oxidation capability, reduces some toxic and harmful substances generated due to incomplete oxidation, alleviates the problem of ceramic membrane contamination, and prolongs the system operation period. An experiment device mainly comprises three parts: an ozone generation device, a ceramic membrane device, and a computer data acquisition and analysis system; an ozone outlet of the ozone generation device is connected with a water inlet valve of the ceramic membrane assembly through a silicone flexible pipe to realize the coupling of the two system. The method of the invention can improve the purifying effect of routine water treatment technology, and provides novel, high-efficient and cheap water deep treatment technology for enhanced removal of low-concentration high-toxicity refractory organic pollutants in water.

The invention discloses an activated carbon catalytic ozonation device and a sewage treatment process thereof. The device comprises a reaction tank, wherein the reaction tank is partitioned into a rising reaction zone, a falling reaction zone and a separation zone from inside to outside in sequence by virtue of guide cylinders; the bottoms of the three zones are communicated and are used as an activated carbon storage zone; the rising reaction zone is internally provided with an ozone and water input device; the tops of the rising reaction zone and the falling reaction zone are communicated; an annular flow director is arranged at the communicating part of the bottoms of the falling reaction zone and the separation zone; at least a part of the bottom of the flow director stretches into the activated carbon storage zone; an inclined guide surface is arranged at the part below the separation zone, of the top of the flow director. By adopting the activated carbon catalytic ozonation device, the activated carbon can be in a circulation fluidized state, the porosity of an activated carbon bed is improved, the effect of catalysis reaction of ozone molecules and organic pollutants on the surface of activated carbon is improved, the capability of activated carbon catalytic ozonation is improved, the utilization rate of ozone is increased, and the antifouling effect is improved.

The invention provides a method for treating reverse osmosis concentrated water. In the method, the process flows of a laminated filter, heterogeneous catalytic ozone oxidation reaction, an ozone destruction tower and a biochemical reaction tank are adopted. The method comprises the following steps of: adding sodium hypochlorite into the reverse osmosis concentrated water produced in the recycling process of oil refining production wastewater subjected to biochemical treatment and membrane process treatment, sterilizing, filtering by using the laminated filter, fully mixing with ozone, adding into a reactor filled with a zirconium titanate catalyst and performing ozone oxidation; and performing biochemical treatment by using a biochemical reactor with special biological bacteria, wherein the chemical oxygen demand (COD) of effluent after the reverse osmosis concentrated water is treated is below 60mg/L.

A process for removing pollutant from water features use of an activated carbon catalytic ozone oxidizing unit and a biologic activated carbon unit, and includes introducing the water to be treated and the ozone to the activated carbon catalytic ozone oxidizing reactor, mixing, flowing up, staying in activated carbon layer for 5-30 min for removing or converting the organic pollutants, flowing inthe biologic activated carbon reactor, and staying for 5-90 min for removing and degradating the organic pollutant. Its advantages are high utilization rate of ozone and high effect.

The invention discloses a method for oxidizing organic wastewater by ozone, light, electricity and a catalyst. During reaction, ozone is introduced from an aerator arranged at the bottom of the reaction, active carbon-carried nano titanium dioxide is used as an anode, a carbon used as a cathode, and an ultraviolet lamp is arranged on the top or inside of the reactor; the cell voltage is 1 to 20 volts, the time for the action of an active carbon-carried catalyst and a water solution containing arsenic, the air and the ultraviolet lamp is 10 to 120 minutes, and the mass ratio of an added catalyst to waste water participating in reaction is between 1:200 and 1:20; a method for the ozone photoelectrocatalytic deep treatment of organic wastewater uses the active carbon-carried nano titanium dioxide as an anode to promote the photoelectrocatalysis and to catalyze the ozone to generate high- oxidizability free radicals; and organic substances difficult to treat can be fully degraded under the concerted action of light, electricity and the ozone, and the method has more utilization value than single ozone catalytic oxidation and single photoelectrocatalysis.

The invention relates to the technical field of exhaust gas treatment, in particular to an exhaust gas purifying device which comprises an ultraviolet catalytic device, an ozone treatment device and a spraying device. A gas outlet of the ultraviolet catalytic device is communicated with a gas inlet of the ozone treatment device, and a gas outlet of the ozone treatment device is communicated with a gas inlet of the spraying device; the ultraviolet catalytic device is provided with an ultraviolet photolysis cavity and an ultraviolet lamp tube arranged in the ultraviolet photolysis cavity, and a photocatalyst is arranged in the ultraviolet photolysis cavity and is irradiated by ultraviolet light of the ultraviolet lamp when exhaust gas is treated; and the ozone treatment device is provided with an ozone decomposition cavity, and the ozone decomposition cavity is provided with a composite catalyst for catalysis of decomposition of ozone. Compared with the prior art, ultraviolet catalyzed photolysis, treatment of residual ozone, spraying of waste solution and absorption of exhaust gas can be combined organically, organic pollutants can be decomposed efficiently, no secondary pollution of ozone can be caused, and the exhaust gas purifying device has the advantages of rapid and efficient treatment of exhaust gas, simpliness in operation and good purifying effects.

The invention relates to a method of catalytic ozone oxidation organic matter removal in water, which belongs to the water treatment technical field. The method solves the problems that: in the existing method of catalytic ozone oxidation organic matter removal in water, the utilization ratio of ozone is low, the organic pollutant is not enough oxidized, the cost is higher, and catalyzer is easily lost by adopting the metal catalytic ozone oxidation technology, the application is difficult to use in mass production, uneven surface exists on the solid catalyzer, and the inner diffusion velocity is lower. The method has the steps that: firstly, water containing the organic pollutant enters into an ozone contact tower; secondly, output water of the ozone contact tower enters into a catalyzing bed the inner part of which is filled with zerovalent ferric and filling material. The method solves the problems that uneven surface exists on the solid catalyzer and the inner diffusion velocity is lower, has the advantages of high catalytic activity, low cost, homogeneous catalysis oxidation and heterocatalysis oxidation of the catalyzer easily separating from water, improves the utilization ration of the ozone, and can be applied to the mass production.

The invention relates to a waste water purification method and a reactor both adopting ozone oxidation catalysis and using compound suspended carrier. The compound suspended carrier takes suspended activated carbon as a carrier and the compound of copper, iron, manganese, cobalt, and nickel as an active component. The compound suspended carrier is placed in an ozone oxidation catalysis reactor in water processing techniques, water inflows continuously and the reaction is carried out, so that a multi-phase heterogeneous oxidation catalysis system taking the activated carbon as the carrier is established, thereby improving the capability of ozone in optionally oxidizing organic pollutants in waste water and the utilization ratio of ozone, and removing the color and odor of the organic pollutants in waste water. The invention suits the pre-oxidation on slightly polluted drink water sources and deep treatment on organic industrial waste water, and is particularly suitable for the deep treatment on non-degradable organic waste water having received secondary treatment to greatly reduce biotoxicity, organic pollutants, and color of the waste water, lead the waste water after being treated to be similar to tap water, and achieve the purpose of carrying out deep treatment on organic waste water.

The invention provides a landfill leachate processing process. Landfill leachate sequentially passes through a pretreatment system, a main body biological treatment system and a deep treatment system; the pretreatment system consists of a regulating pool, an adsorption pool and a coagulating pool; wastewater is pretreated sequentially through the devices; outlet water enters the main body biological treatment system; the main body biological treatment system comprises an anaerobic EGSB (expanded granular sludge bed) reactor, an A/O short-range nitratlon reaction pool and an anaerobic ammonia oxidation UASB (upflow anaerobic sludge blanket) reactor; the treatment devices perform real-time regulation control through a PLC (programmable logic controller) control system for denitrification decarbonization reaction; the outlet water enters the deep treatment system for further treatment; the deep treatment system comprises a secondary coagulating pool, a primary homogeneous catalysis ozone oxidation reaction pool, a MBR (meane biological reactor) secondary biological reaction pool and a secondary homogeneous catalysis ozone oxidation reaction pool; finally, organic matters, total nitrogen and ammonia nitrogen of the outlet water reach the discharge standard. The landfill leachate processing process has the advantages that efficient denitrification and carbon removal are realized; the energy is saved; the consumption is reduced; the operation is stable; meanwhile, the goal of zero concentrated liquid generation is realized.

The invention discloses a bicirculating catalytic ozone water-treatment device which solves the problems of reduced oxidation efficiency and the like caused because fluids inside the traditional device can only flow in a unicyclic way. The bicirculating catalytic ozone water-treatment device comprises three cylinders, wherein the three cylinders are concentrically arranged and form inner and outer bicirculation with strong catalytic ozonation and weak catalytic ozonation mutually separated in space; the outer circulation area decomposes the components contained in oxidable organics inside wastewater through active carbon catalytic ozonation with low catalytic characteristic by utilizing the adsorption characteristics of active carbon; and the inner circulation area realizes that hydroxyl radicals with oxidation efficiency higher than that of ozonation are generated through ultraviolet light and TiO2 concerted catalytic ozonation and oxygenizes organic molecules which are contained in the wastewater and difficult to degrade by utilizing the hydroxyl radicals. The bicirculating catalytic ozone water-treatment device disclosed by the invention can be used for realizing the space separation of organic pollutants contained in water according to difficulty degree, thereby improving the oxidation efficiency, shortening the hydraulic retention time and reducing the ultraviolet lamp and ozone consumption. The invention also provides a method for carrying out water treatment by using the bicirculating catalytic ozone water-treatment device.

The invention relates to the technical field of water treatment, and especially relates to a preparation method of a modified alumina carrier, a catalytic ozone oxidation catalyst, and an application of the catalyst. The preparation method of the modified alumina carrier comprises the following steps: providing an alumina substrate; carrying out primary modifier spray immersion, primary drying and primary calcination on the alumina substrate, and naturally cooling the obtained calcined alumina substrate to room temperature; and carrying out secondary modifier spray immersion, secondary drying and secondary calcination on the alumina substrate, and naturally cooling the secondary calcined alumina substrate to obtain the modified alumina carrier. The catalytic ozone oxidation catalyst prepared from the modified alumina carrier greatly improves the COD removal rate, so the sewage treatment cost is reduced; the dissolution rate of metal ions is greatly reduced, so the service life of the catalyst is prolonged; and the catalyst has the advantages of low cost and simple preparation method, and is very suitable for industrial production.

The invention discloses a catalytic ozonation fluidized bed reactor for efficiently removing CODcr in wastewater and belongs to the field of sewage treatment equipment. The reactor comprises a fluidized bed reactor body, a solid-liquid separation system, an ozone oxidation system, a powdered catalytic oxidant addition system and a powdered catalytic oxidant recycling system. The reactor has the outstanding capacity of removing difficultly biodegraded organic pollutants in wastewater in the industries such as coal chemical industry, steel, biological pharmacy and printing and dyeing, can serve as a pretreatment system of a membrane filtration system and can also be used for industries and regions executing the high COD emission standard. The COFR technology has the advantages of low investment cost, simple structure and simplicity and convenience in operation, the COD removal rate is high, secondary pollution is avoided, the modular combination mode is convenient to design and implement, the COFR reactor can be combined with other water treatment methods, the problems that the sewage treatment in the coal chemical industry, pharmacy, printing and dyeing and other related industries does not reach the standard and the concentrated water in nanofiltration reverse osmosis and other processes cannot be treated can be effectively solved, and the reactor is an effective and practical novel technology and is widely applied and popularized.

The invention discloses a method and device for simultaneously desulfurizing and denitrifying flue gas by photo-catalysis and oxidation. The method comprises the following steps: firstly, enabling the flue gas to enter a vacuum ultraviolet irradiation region; under high-energy ultraviolet irradiation, generating active free radicals and ozone for oxidizing to remove partial SO2 and NOx in the flue gas; then enabling the flue gas to penetrate through a whole type photocatalyst bed layer; purifying and removing the SO2 and the NOx under the synergistic effect of the photo-catalysis and oxidation and catalytic ozonation; enabling acid-containing flue gas to enter an atomization absorption region; under an absorption effect, washing and removing desulfurizing and denitrifying products, namely H2SO4 and HNO3. The device for desulfurizing and denitrifying the flue gas is composed of the vacuum ultraviolet irradiation region, the whole type photocatalyst bed layer and the atomization absorption region. By adopting the catalyst bed layer designed by the invention, 100 percent of ultraviolet light can be illuminated to the surface of a catalyst, and nearly 100 percent of the surface of the catalyst can also receive the ultraviolet light; the problem that the light illumination utilization rate in a traditional photo-catalysis waste gas treatment process is not ideal is solved.

The invention discloses a landfill leachate zero concentrated solution deep treatment system and method. The landfill leachate zero concentrated solution deep treatment system comprises a flocculation catalytic filtration reactor, a first catalytic ozonation reactor, a high-speed turbulent flow reactor with a denitrification function, and a second catalytic ozonation reactor which are connected in sequence. The method is a deep treatment process that the system is adopted to treat landfill leachate wastewater which is treated by using a front process. With effective combination of techniques of high-efficiency biochemistry, high-class oxidation, catalytic reduction and the like, the landfill leachate after the biochemical treatment is deeply treated, so that the defects of a conventional landfill leachate deep treatment process are overcome while corresponding emission standards are met, and a zero concentrated solution treatment process is achieved in deed.

The invention provides a method and device for degrading nitrobenzene waste water in a high gravity field through catalytic ozonation, belongs to the technical field of nitrobenzene waste water ozonation degradation, and solves the problem that sedimentation of ferrous ions is caused when the initial pH value of the waste water is 7 to 10 in the conventional catalytic ozonation treatment method of nitrobenzene waste water. The method comprises the following steps: a ferrous iron chelating agent is mixed with nitrobenzene waste water of which the initial PH value is 7-10, the mixed solution is introduced into a high gravity reactor to react with ozone gas, and ozone dissolved in catalytic water generates hydroxyl free radicals, so that nitrobenzene compounds are degraded through ozonation. When the method provided by the invention is compared with the conventional bubbling reaction, the mass transfer rate of ozone is improved by two times; and besides, the ferrous iron chelating agent is combined with an ozonation process, therefore, ozone in the waste water is quickly decomposed, a lot of hydroxyl free radicals are generated, organic pollutants are quickly decomposed, and the oxidation efficiency is doubled; the process is simple, the treatment cost is reduced to the largest extent, the removal rate of nitrobenzene compounds reaches 95% or above, the mineralization rate reaches 80%, and the utilization ratio of ozone is improved by 1 to 2 times.

The invention provides a method for preparing a ZnO/g-C3N4 ozone composite catalyst and application. The method comprises the following steps: providing a first solution, wherein the first solution comprises ZnO, g-C3N4 and a dispersing agent; the ZnO and the g-C3N4 are uniformly dispersed in the first solution; performing stirring evaporation to dry the first solution, and removing the dispersing agent in the first solution so as to obtain a mixture; drying the mixture, grinding, and performing high-temperature calcinations, thereby obtaining the ZnO/g-C3N4 ozone composite catalyst. The ZnO/g-C3N4 ozone composite catalyst prepared by using the method can be used for catalyzing ozone oxidization organic pollutants; as the ZnO/g-C3N4 ozone composite material is applied to the ozone catalysis process, dissolution of metal ions after reaction of a conventional metal ozone catalyst can be effectively reduced, and reaction activity and stability of the catalyst can be improved.

The invention discloses a preparation method of a composite metal oxide loaded catalyst and an application of the catalyst to the field of waste gas treatment, and belongs to the technical field of industrial waste gas. The preparation method includes the steps: performing equivalent-volume impregnation on activated carriers in composite metal nitrate impregnation solution containing manganese, cobalt, cerium, iron, copper and nickel; performing ultrasound, drying and roasting on the impregnated carriers to obtain the catalyst loaded the composite metal oxides. The preparation method is green,environmentally friendly, simple to operate and easily industrialized. NO in flue gas is transformed into NOx at low temperature by the aid of the catalyst prepared by the method, the molar ratio ofO3 to NO in 500ppm NO is 0.6, the relative humidity of the flue gas is 10%, reaction temperature is 100 DEG C or less, MnOx-CeOx-Al2O3 serves as a catalyst after reaction for 90 minutes, the transformation rate of the NO can be kept about 40%, MnOx-Al2O3 serves as a catalyst, and highest removal rate can reach 80%, so that ozone oxidation is effectively catalyzed.

The invention relates to a catalytic ozone oxidizing method for industrial wastewater deep treatment. The method comprises the following steps: calcining raw material mainly containing iron and carbon in the reducing atmosphere to form iron-carbon filler, wherein the filler finished product is of particle shapes, has a particle diameter phi of 5-15mm, and comprises the following effective components in percentage by weight: 40-65 percent of reduction-state iron, 15-25 percent of carbon, 5-25 percent of transition metal; performing acid and oxidation modifying on the iron-carbon filler: reacting on a table for 0.5-5.0 hours in HNO3 with concentration of 0.5-5mol/L at 30-60 DEG C; forming a filling table by using the modified particles, arranging an ozone distribution device under the filling to form a catalytic zone reaction tank; catalyzing ozone to form an advanced oxidizing method in the neutral condition by using secondary bio-treated effluent as a processing object so as to deep remove organic matters out of the industrial waste water, wherien the hydraulic staying time is controlled to be 20-360min.

The invention discloses an inorganic film for treating organic waste water under catalysis of ozone and a preparation method of the film. The preparation method mainly comprises preparation and modification treatment of a supporting body and a separation layer of the film, and is characterized by comprising the step of respectively loading different types of catalysts on the surfaces of the modified supporting body of the inorganic film and the modified film separation layer so as to form a multi-level three-dimensional catalysis composite. The three-dimensional catalysis composite prepared by the method not only can be used for achieving a solid-liquid separation function of an ordinary inorganic film, but also has the function of catalyzing ozone decomposition, so that the oxidation efficiency and the degradation efficiency of ozone on organic pollutants in waste water can be improved. Furthermore, the chemical components of the supporting body and the film separation layer are modified, so that film holes are smooth, the pressure drop is small, the blocking rate of pollutants is reduced, and the service life of a film assembly is prolonged.

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.

A Ru/Al2O3 catalyst for the catalytic oxidization of ozone is composed of Al2O3 as carrier and RuO2 as active component proportionally. Its preparing process includes such steps as equivolume mixing between RuCl3 solution and Al2O3 carrier, impregnating in shaker, drying and microwave heating. It has high effect to remove ozone, interference substance to internal secretion, phenols and micro-molecular acids.

The invention relates to a novel microporous ceramic-based catalyst applied to the catalytic oxidation of ozone, which is characterized in that the catalyst comprises the following raw materials by weight proportion: 30 to 70 percent of diatomite, 10 to 30 percent of active constituent, 5 to 15 percent of pore former, and 5 to 15 percent of clay, and the firing temperature is between 400 and 1,050 DEG C after a green body is produced. The microporous ceramic-based catalyst is applied to removing trace organic pollutants in pure water. After the ozone with certain concentration is dissolved into water, the passing of the catalyst can catalyze the oxidization of the ozone to organic substances, ensure that the oxidation rate and the oxidation efficiency are greatly improved, and efficiently strengthen the removal of the trace organic pollutants in the water.

The invention provides a device and a method for treating pulping wastewater by using catalytic ozone. The device comprises a first reactor and a second reactor which have the same structure (the corresponding structures are a first structure and a second structure), a water reservoir and a tail gas collection bottle, wherein an activated adsorption material loaded transition metal oxide catalyst is borne on a support air distribution plate in a tank body; an aerator is arranged at the bottom of the tank body; a water inlet, a water outlet, an ozone inlet and a sampling port are formed on the tank body; a tail gas port is formed on a top cover; a first ozone inlet is connected with a first aerator through a pipeline; a first water outlet is connected with a water inlet of the water reservoir through a pipeline; a water outlet of the water reservoir is connected with a pump and a second water inlet through pipelines; a first tail gas port, a second ozone inlet and a second aerator are connected in turn through pipelines; and the tail gas collection bottle is provided with an exhaust pipe and connected with a second tail gas port. The wastewater is treated by two-stage reactors and the catalytic ozone, so that the utilization rate of the ozone is improved, wastewater treatment efficiency is improved, the device is convenient to operate and maintain, and investment is small.

The invention discloses a method for treating catalytic ozone oxidation water. The method comprises the following steps of: (1) adding hydrogen peroxide and Ti4+ containing soluble compounds to waste water which contains organic substances and of which the pH value is adjusted to be between 0.5 and 3.5, and stirring the waste water for complete dissolution to obtain the mixed solution, wherein the organic substances are one or a mixture selected from acetic acid, acetophenone, oxalic acid and methyl benzene, and the mass ratio of charging materials of the organic substances of the H2O2 and the Ti4+ is 1:0.05-2:0.01-0.5; and (2) adding the mixed solution obtained at the step (1) to an ozone reactor, and filling ozone to the ozone reactor for degradation reaction. The method has the advantages of easy operation, high removal rate of organic substances, high utilization ratio of ozone, good economy and feasibility and the like.