30results about How to "Achieve oxidative degradation" patented technology

The invention relates to a device for removing several pollutants of boiler smoke. Wherein, it comprises (1), before or after the static deduster of smoke channel, ejecting into ozone at low temperature section as 110-150Deg. C, while the ratio between ejected amount and nitrogen oxide is 1.1-2.0 and the reaction time is more then 0.5s; (3), feeding treated smoke into alkali washing tower to wash, and absorbing nitrogen oxide, sulfur oxide, mercury, chloride hydrogen, and hydrogen fluoride, adding H2S, Na2S, or NaHS into liquid grove to fix mercury. The invention can reach 80% denitrate efficiency and 95% desulfurizing efficiency, 80% demercuration efficiency, 95% antichloration defluorination efficiency, and oxidize the volatile organic pollutant.

The invention provides a reactor for gas-solid phase electro-catalytic reaction, and a method for eliminating VOCs (volatile organic contaminants) by using the reactor. The reactor comprises an anode gas chamber, a cathode gas chamber, an electrocatalytic anode, a diaphragm and an electrocatalytic cathode, wherein both of the electrocatalytic anode and the electrocatalytic cathode are air-permeable; the diaphragm is placed between the electrocatalytic anode and the electrocatalytic cathode; the disphragm, the electrocatalytic anode and the electrocatalytic cathode form an integrated body, so as to form an integrated structure; the anode gas chamber and the cathode gas chamber are independently cavities with through holes; and the integrated structure is placed between the through hole of the anode gas chamber and the through hole of the cathode gas chamber, and covers the through hole of the anode gas chamber and the through hole of the cathode gas chamber. An electrolytic tank can eliminate the indoor VOCs at room temperature, and most of the products are CO2; in addition, the electrolytic tank for eliminating the indoor VOCs is safe, convenient and small in energy consumption, and oxidative degradation of the VOCs can be realized only by 2-V additional direct-current voltage.

The invention belongs to the technical field of microbes, and particularly relates to paracoccus denitrificans TS-1, and the preservation number is CGMCC NO.17605. The paracoccus denitrificans has a 16SrDNA sequence shown in SEQ ID No.1. The invention further discloses application of the paracoccus denitrificans TS-1 in deodorization and sewage treatment. The paracoccus denitrificans TS-1 not onlyhas higher heterotrophic nitrification and aerobic denitrification capacities, but also has a stronger sulfide removal capacity, and is a strain with three functions.

The invention discloses a method for purifying blast furnace flue gas by using ionic liquid. The high-stability ionic liquid is taken as an absorbent for absorbing pollutants in the flue gas, wherein the absorption pressure is 0.05-0.14MPa, the absorption temperature is 20-80 DEG C, and the absorption time is 4-6 hours; and pollutants in the absorbed flue gas are subjected to desorption operation at 140-160 DEG C. A preparation method of the ionic liquid comprises the following steps: refluxing and stirring equimolar 1-(2-phenethyl) imidazole hydriodate and iodine ethyl diethyl phosphate with methanol as a solvent at 120 DEG C for 48 hours; after reaction is ended, cooling to room temperature, and carrying out spin steaming to remove a solvent so as to obtain viscous liquid; dissolving the liquid into water; adding equimolar sodium hydroxide, stirring at room temperature for 2 hours, and carrying out spin steaming to remove water; and filtering out solid sodium iodide, and drying in vacuum so as to obtain the ionic liquid of 1-(2-phenethyl)-3-(2-diethyl phosphite ester) ethyl imidazole iodine. According to the method, the denitration efficiency can be over 95%, the desulphurization efficiency can be over 98%, the mercury removal efficiency is over 90%, the dechlorination and defluorination efficiency is over 95%, oxidative degradation of partial volatile organic pollutants is achieved, and increasingly stringent environmental requirements in future can be met.

The invention discloses an iron smelting flue gas treatment method. The iron smelting flue gas treatment method comprises the following steps: firstly, dust removal is carried out on flue gas by a dust remover; then, nitric oxide in the flue gas is removed by adopting an SCR method; after the nitric oxide is removed, the flue gas is conveyed into a desulfurization device; the flue gas subjected to desulfurization treatment is discharged into air, wherein the desulfurization device is provided with a nozzle; in a desulfurization process, a mixed solution of hydrogen chloride and hypochlorous acid is sprayed into the desulfurization device, wherein the mol ratio of hydrogen chloride to hypochlorous acid is (5-10) to (3-4); a compound adsorbent is arranged at a flue gas outlet of the desulfurization device and is specifically formed by 20wt%-60wt% of active carbon, 20wt%-40wt% of MCM-41 and 20wt%-30wt% of NaY type zeolite; and a preparation method of the compound adsorbent is a mixing method. By virtue of the method, when more than 80% of denitration efficiency and more than 95% of desulfurization efficiency are reached, more than 80% of demercuration efficiency and more than 95% of dechloridation and defluorination efficiency are reached and partial volatile organic pollution is oxidized and degraded, so that the environment protection standards which are increasingly strict in the future can be met.

The invention relates to a filter-type electrochemistry air sterilization and purification device.The filter-type electrochemistry air sterilization and purification device comprises a shell, a power source, an electrolyzed water generation module and air drafting devices for driving air to flow through the electrolyzed water generation module.The power source is connected with a positive electrode connecting end and a negative electrode connecting end which are connected to the electrolyzed water generation module, the electrolyzed water generation module is installed in the shell, an air inlet and an air outlet are formed in the electrolyzed water generation module, and outside air is led into the electrolyzed water generation module by the air drafting devices through the air inlet, and is processed through the electrolyzed water generation module and discharged through the air outlet.According to the filter-type electrochemistry air sterilization and purification device, the air is led into the electrolyzed water generation module through the air inlet in the electrolyzed water generation module by the air drafting devices, is in contact with active oxygen substances generated in the electrolyzed water generation module and then is discharged from the air outlet, sterilization and purification are achieved, indoor objects, plants, persons and the like are not damaged, sterilization and purification can be carried out in the indoor movement space with persons, and the elimination efficiency of microorganisms can be 99% or above.

The invention relates to a landfill sludge treatment method. The method comprises the following steps: sampling and analyzing sludge, determining the pH value, the type of smelly pollutants, the landfill depth and the horizontal distribution of the sludge, preparing an oxidation preparation, injecting the oxidation preparation into underground sludge by virtue of in-situ mixing and stirring equipment, and simultaneously stirring the oxidation preparation and the sludge underground by virtue of an impeller stirring head of the in-situ mixing and stirring equipment; after uniform stirring, carrying out standing reaction for 3.5-5.5 hours, and putting a curing agent into sludge by using an engineering machine, and stirring continuously by using the in-situ mixing and stirring equipment; afteruniform stirring, standing for 24-48 hours, carrying out open type excavation and transfer on the solidified sludge. By sequentially carrying out in-situ treatment and excavation, the construction operability is strong, the investment cost of the equipment is low, the treatment period is short, the treatment is thorough, the secondary pollution is avoided, the problem of stink pollution in the excavation process of the sludge is solved, and meanwhile, the treatment of the sludge is realized; and the method has relatively good economic and social benefits.

The invention relates to an integrated multi-medium-catalysis waste gas treatment device, comprising an oxidation reaction tank, a photocatalyst recovery system, a circulating spraying system, an absorption reactor, a dosing system, an ozone generation system and a UV catalytic system, wherein the absorption reactor comprises a filler distribution layer and a catalytic ozonation bed layer. The invention also discloses an application method of the device. The application method comprises the following steps: adding hydrogen peroxide or sodium hypochlorite into the oxidation reaction tank via the dosing system; allowing waste gas to enter the absorption reactor through an inlet and to be mixed with ozone generated by the ozone generation system; atomizing oxidation absorption liquid via thecirculating spraying system, and allowing the oxidation absorption liquid to pass through the filler distribution layer and the catalytic ozonation bed layer for purification and then to be dischargedfrom an outlet; and turning on the UV catalytic system, enabling the treated oxidation liquid to overflow to the photocatalyst recovery system, pumping a recovered photocatalyst to the oxidation reaction tank, and spraying a supernatant into the absorption reactor through the circulating spraying system. The device disclosed by the invention is simple in structure and easy to operate, and can improve the problems of low treatment efficiency and serious secondary pollution at present.

The invention discloses a combined-type flue gas purification method. The combined-type flue gas purification method comprises following steps: firstly a dust remover is used for dust removing of flue gas; SCR method is adopted to remove nitrogen oxides in flue gas; after removing of the nitrogen oxides, the flue gas is delivered into a desulphurization device for desulfurization treatment, and then is discharged, wherein the desulphurization device is provided with nozzles; in the process of desulphurization, a mixed solution of hydrogen chloride and hypochlorous acid is sprayed into the desulphurization device via the nozzles, and bentonite absorbent is arranged at an exhaust gas outlet of the desulphurization device. Denitration efficiency of the combined-type flue gas purification method is 80% or higher, desulphurization efficiency is 98% or higher, at the same time demercuration efficiency is 80% or higher, dechloridation and defluorination efficiency is 95% or higher, oxydative degradation of a part of volatile organic pollutants is realized, and increasingly strict environmental protection requirements can be satisfied.

The invention discloses a method and a complete device for zero-tendency discharge of reverse osmosis concentrated water of coal chemical industry enterprises. According to the method and the complete device disclosed by the invention, by introducing a catalytic oxidation method, a high-efficiency biochemical process and an ion exchange technique, high-efficiency removal of refractory organic substances and substances easily scaling such as calcium and magnesium in the reverse osmosis concentrated water is realized, and the problems of pollution of a high-pressure reverse osmosis membrane and scaling of an evaporation system are effectively solved. In an MnO2-CeO2-CoO/AC catalyst in the catalytic oxidation method, the ratio of weight parts of MnO2, CeO2, CoO toand AC is (1 to 10):(0.1 to 1):(0.1 to 1):100; a whole treatment system does not discharge sewage to the outside, and all components are recycled for process water, supplementary water of circulating cooling water and the like of coal chemical industry, so that the zero-tendency discharge of the reverse osmosis concentrated water of the coal and chemical engineering enterprises is realized, and secondary pollution to the environment is avoided.

The invention discloses a preparation method of livestock and poultry manure anaerobic fermentation biogas residue biomass charcoal. The preparation method comprises the following steps: (1) drying collected livestock and poultry manure anaerobic fermentation biogas residues to constant weight, and mechanically crushing the dried livestock and poultry manure anaerobic fermentation biogas residues into powder for later use; (2) placing the powder obtained in the step (1) in a furnace for pyrolysis, and conducting grinding after pyrolysis is completed to obtain black solid; (3) cleaning the powder ground in the step (2) in water until the powder is neutral, and conducting drying; and (4) grinding the powder dried in the step (3), and conducting sieving with a 100-mesh sieve to obtain the biogas residue biomass charcoal. The synthetic route is simple, the preparation cost is low, large-scale production can be achieved, and the prepared biogas residue biomass charcoal can effectively adsorb bisphenol A in water and activate persulfate to degrade bisphenol A.

The invention relates to a method for removing organic pollutants in a water body by activating persulfate with biochar, in particular to a method for removing organic pollutants in a water body by activating persulfate with nutrition-enhanced soybean sprout-based biochar. The invention aims to solve the technical problems that existing biochar materials are poor in catalytic activity when being used for activating persulfate, a large amount of modifiers needs to be added, secondary pollution is easily caused to the environment, and the existing biochar materials are easily interfered by halide ions, oxygen-containing anions and natural organic matters in a persulfate system. The catalyst raw material adopted in the method is soybean which is rich in source, low in cost, simple to prepare and environment-friendly, non-free radical activation is mainly adopted in the activation process, the reaction rate is high, and persulfate is saved. When 0.2 g/L of the catalyst and 0.5 mM of potassium hydrogen persulfate are added, the degradation efficiency of 10 mg/L of phenol can reach 100% within 10 min.

The invention relates to a catalytic ozonation-based pretreatment method for acid wastewater containing water-soluble polymer hard to degrade, and belongs to the technical field of wastewater treatment. According to the method, firstly, an activated aluminum oxide loaded copper manganese oxide catalyst is prepared, wherein the load rate of copper manganese oxide on activated aluminum oxide particle carriers is 3-5wt. %, and the molar ratio of the copper component to the manganese component is 1:(1-3); then the catalyst is added to to-be-treated wastewater with a pH range of 3-5.5, then an additive hydrogen peroxide solution is added into the wastewater, ozone is introduced and aeration is performed under the condition of room temperature, and then magnetic stirring is performed at a rotation speed of 120-200 rpm, thereby realizing catalytic ozonation-based pretreatment of the acid wastewater containing the water-soluble polymer hard to degrade. The pretreatment method is a novel advanced oxidation technology, is easy to operate, and solves the problem that water-soluble polymer pollutants in the wastewater with relatively low pH are not easy to oxidize and degrade (catalytic ozonation method); and long chains of pollutant molecules are broken, thus being conducive to subsequent biological treatment or membrane treatment.

The invention provides a preparation method and application of a Fenton cocatalyst for continuous flow organic wastewater treatment, the Fenton cocatalyst takes thiourea and ammonium molybdate as reactants to prepare a reaction liquid, takes a tubular ceramic membrane as a support material, and transfers the reaction liquid and the tubular ceramic membrane into a polytetrafluoroethylene reaction kettle together, and the reaction liquid is heated to 80-90 DEG C; and carrying out a hydrothermal reaction to obtain the molybdenum sulfide modified functional ceramic membrane MoS < x >/CM. The molybdenum sulfide modified functional ceramic membrane prepared by the method has rich pore structures and excellent mechanical strength, contains a large number of reducing active sites, can efficiently promote iron ion circulation in Fenton reaction, and improves the utilization rate of an oxidizing agent; when the nano-catalyst is applied to a continuous flow wastewater treatment reactor, removal of suspended solids and synchronous degradation of organic pollutants in actual wastewater can be realized at the same time, and the key technical problems that the nano-catalyst is difficult to be applied to the continuous flow wastewater treatment reactor and a traditional Fenton system is low in wastewater treatment efficiency are solved.

The invention discloses a ferrous/ultraviolet synergistically activated sodium hypochlorite coupled ultrafiltration water purification device and an operation method thereof, and relates to a ferrous/ultraviolet synergistically activated sodium hypochlorite coupled ultrafiltration water purification device and an operation method thereof. The invention aims to solve the problem of poor membrane pollution treatment effect caused by algae extracellular polymeric substances while micromolecules are removed by membrane pretreatment in the existing water treatment process. The device comprises a water inlet pipe, a sodium hypochlorite adding tank, a ferrous iron adding tank, a photochemical reaction area, a membrane filtration water purification area, a water outlet pipe and a backwashing pipe,the water inlet pipe is connected with a water inlet of the photochemical reaction area through a water inlet pump, and a water outlet of the photochemical reaction area is connected with a water inlet of the membrane filtration water purification area through a photochemical reaction area water outlet pump; a water outlet of the membrane filtration water purification area is respectively connected with the water outlet pipe and the backwashing pipe through a tee joint. According to the invention, the activation characteristic of ferrous ions and ultraviolet light on sodium hypochlorite is utilized to realize efficient removal of pollutants and improvement of membrane separation efficiency. The device and method is applied to the technical field of membrane water treatment.

The invention provides a two-channel advanced oxidation apparatus and a flue gas purification system using the two-channel advanced oxidation apparatus. The flue gas purification system comprises a flue gas output device, a heat recovery device, a dust removal device, a two-channel advanced oxidation apparatus, an oxidant feeding device, a purification removal reaction device, a removal agent supply device and a gas discharge device, wherein the two-channel advanced oxidation apparatus comprises a body, a gas inlet, a first gas outlet, an oxidant feeding port, a gas channel separation plate and a waste discharge port, the interior of the body is divided into a first gas channel and a second gas channel by the gas channel separation plate, the gas inlet ends of the first gas channel and thesecond gas channel are communicated to the gas inlet, the oxidant feeding port is arranged at the first gas channel and close to the gas inlet end, a mixed reaction zone is formed inside the first gas channel, the gas outlet end of the first gas channel is communicated to the first gas outlet, and the second gas outlet is connected to the gas inlet of the purification removal reaction device or the gas discharge device. According to the present invention, the technical scheme can significantly reduce the ozone adding amount when the same NO removal rate requirement is met so as to substantially reduce the operation cost.

The invention discloses a forward osmosis-three-dimensional electrode combined reactor and a method for removing PPCPs (Pharmaceuticals and Personal Care Products) in sewage by virtue of a combined reactor. The forward osmosis-three-dimensional electrode combined reactor comprises a top plate, an anode net, a silica gel sealing pad A, activated carbon three-dimensional particles, a cathode net, aforward osmosis membrane, a silica gel sealing pad B and a base plate, wherein an anode and a cathode are mounted in the silica gel sealing pads, the activated carbon three-dimensional particles are located between the two electrodes, and the forward osmosis membrane is located between the two silica gel sealing pads. According to the forward osmosis-three-dimensional electrode combined reactor and the method, PPCPs are effectively intercepted by virtue of an interception effect of the forward osmosis membrane and the intercepted PPCPs are also oxidized and degraded by virtue of an electrochemistry oxidation effect of a three-dimensional electrode, so that the harmless removal of the PPCPs is realized; by utilizing a low-pressure reverse osmosis device, the stability of the concentration of extracting liquid is guaranteed, the PPSPs entering the extracting liquid can be intercepted again, so that the good effluent quality is guaranteed; and the simultaneous interception and degradationof PPCPs are integrally realized.

The invention discloses a layered core-shell structure catalyst, a preparation method and application thereof in low-temperature catalytic oxidation of toluene, the catalyst takes a mesoporous cerium dioxide nanorod as a core, a coating layer comprises a manganese dioxide nanosheet layer and an active component loaded on the manganese dioxide nanosheet layer, and the active component is platinum nanoparticles. By applying the catalyst, the toluene degradation rate can reach 95.6% under the conditions that the temperature is 165 DEG C and the toluene concentration is 1000ppm. According to the core-shell structure catalyst, the activity of the catalyst can be improved while the cost is reduced, and methylbenzene in industrial tail gas can be quickly and efficiently eliminated.