53results about How to "Increase the speed of oxidation reaction" patented technology

The invention discloses a method for simultaneously removing sulfur, niter and mercury from smoke based on catalytic oxidation. The method is characterized by comprising the following steps of: (1) arranging a catalytic reactor in a dust-removed smoke duct, wherein a catalyst for promoting oxidizing reaction of NO and HgO is filled in the catalytic reactor; (2) allowing the dust-removed smoke to pass through the catalytic reactor, wherein under catalysis of the catalyst, the reaction speed of the NO, the HgO and O2 is increased and the NO and the HgO are oxidized into NO2 and Hg<2+>; and (3) introducing the smoke subjected to catalytic oxidation into an absorber with an absorption solution, wherein the absorption solution is used for absorbing NO2, Hg<2+> and SO2 from the smoke. The invention also discloses a system applicable to the method. According to the method and the system, the sulfur, the niter and the mercury are removed from the smoke; external oxidant is not required to be added; preparation, transportation and storage of strong oxidant are avoided; operating cost is reduced; and economy and safety of the system are improved.

The method of regenerating alkali solution containing sodium mercaptide is to oxidize sodium mercaptide in alkali solution with oxygen-rich air with oxygen concentration of 26-99.99 vol% intelligent presence of catalyst, such as cobalt phthalcyanide sulfonate, into disulfide. Sodium mercaptide including sodium methyl mercaptide, sodium ethyl mercaptide, etc in alkali solution, such as water solution of sodium hydroxide, is mixed with oxygen-rich air and reacted under the action of catalyst, such as cobalt phthalcyanide sulfonate, to produce sodium hydroxide and disulfide, such as dimethyl disulfide, diethyl disulfide, etc., so that the alkali solution has lowered sodium mercaptide concentration and raised sodium hydroxide concentration. The regenerated alkali solution after eliminating the disulfide may be reused in the mercaptide eluting process of liquefied alkali.

The invention relates to a catalytic wet oxidation method of flue gas desulfurization waste liquor. In the presence of a catalyst, flue gas desulfurization waste liquor contacts air to oxidate sulfite into sulfate, wherein the catalyst uses nano TiO2 as a supporter, the active component of the catalyst is one or more of noble metal elements Pt, Pd, Ru and Rh, and the assistant is one or more of rare earth metal elements La, Ce, Pr and Nd. The catalyst comprises the following components in percentage by weight: 0.05-0.5% of noble metal element and 1-10% of rare earth metal element. The mass ratio of the rare earth metal element to the noble metal element is 10-200. By adopting the proper catalyst, the method provided by the invention lowers the cost of the catalyst on the premise of enhancing the reactivity; and the catalyst has the advantages of high stability and no secondary pollution.

The invention discloses a regeneration method of a flue-gas demercuration absorbent composition. The regeneration method comprises the following steps: (a) washing an inactivated absorbent by using hydrogen peroxide solution, removing impurities such as flying ash on the surface of the absorbent, and converting elemental mercury absorbed on the surface of the absorbent into mercury in an oxidation state; (b) treating reacted mercury absorbent by using supercritical water and washing out the mercury absorbed; (c) further treating aqueous solution obtained in the step (b) by using sulfide solution, so as to obtain mercuric sulfide precipitate, and recovering the mercuric sulfide precipitate; (d) dipping and activating the absorbent in ferric chloride solution with the concentration being 1-3mol/L; and (e) drying, then roasting for 1-3 hours, thus obtaining the regeneration absorbent. The regeneration method disclosed by the invention is applicable to regeneration of the modified-metal-oxide-based mercury absorbent, and the recovery of the absorbing performance of the regenerated absorbent is good, so that the service life of the absorbent is prolonged and the economic and social benefits are good.

The present invention relates to a method for preparing cumene hydroperoxide through oxidation of cumene. The method comprises: in the presence of an alpha-methyl styrene dimer, preparing cumene hydroperoxide through oxidation of cumene, wherein preferably the method can be performed in the presence of a by-product inhibitor. According to the present invention, the conversion rate of cumene is improved when the reaction solution contains a certain amount of alpha-methylstyrene dimmers; and after the alpha-methylstyrene dimer and the by-product inhibitor are simultaneously added, the conversionrate of cumene can be increased while the selectivity of methyl phenyl ketone can be effectively reduced.

The invention discloses a desulfurization and denitrification method and a desulfurization and denitrification device, relates to the field of separation and aims to provide a desulfurization and denitrification method and a desulfurization and denitrification device which are low in temperature requirement, rapid in oxidation speed and relatively low in cost, and meet the purposes of reducing difficulties and cost of desulfurization and denitrification and improving desulfurization and denitrification efficiency. According to the main technical scheme of the invention, the desulfurization anddenitrification method comprises the following steps: (1) mixing a flue gas with H2O2, catalyzing reactions with short-wave rays, oxidizing SO2 and aNOX in the flue gas to generate H2SO4 and HNO3, and collecting a flue gas after the reaction is completed, wherein the shortwave rays comprise one or more of ultraviolet rays, X rays and gamma rays; (2) collecting H2SO4 and HNO3 in the flue gas afterthe reactions, or converting H2SO4 and HNO3 into other products.

The invention discloses an ozone catalytic oxidation reactor based on sewage treatment, which includes a sedimentation and coagulation tank, a connecting pipe is mounted at the side end of the sedimentation and coagulation tank in an embedded manner; a pretreatment tank is mounted at one end of the connecting pipe; a water inlet pipe is mounted at the side end of the pretreatment tank; an ozone catalytic oxidation reaction assembly is mounted at one end of the water inlet pipe; a reaction cylinder is mounted at one end of the water inlet pipe; a rotating shaft is rotationally mounted in the reaction cylinder through a bearing; a connecting ring is welded to the outer end face of the bottom of the rotating shaft; stirring blades are uniformly welded on the outer end surface of the connecting ring; the device is provided with a reaction cylinder, a rotating shaft, a connecting ring, stirring blades, connecting holes, an ozone inlet pipe, a rotating ring, a limiting net and a dredging plate. In the reactor, the dredging plate is driven to rotate by the impact of ozone and sewage on the stirring blades, so that the sewage, the ozone and the catalyst are in full contact, pores of the limiting net are prevented from being blocked, the oxidation reaction speed of the sewage is increased, and the sewage treatment speed is increased.

The invention discloses fully-oxidizing oxygen injection calcining equipment for zinc oxide production, and relates to the field of oxygen injection calcining equipment, the fully-oxidizing oxygen injection calcining equipment comprises a filter box body, four support rods are fixedly mounted at the top of the filter box body, and the same calcining box is fixedly mounted at the tops of the four support rods. A motor is started to drive a rotating shaft, a transmission wheel, a transmission belt and a rotating rod to rotate, the rotating rod rotates to drive air suction fan blades to rotate, the air suction fan blades rotate to suck air, then the air enters a liquid storage box through an L-shaped guide pipe and a movable pipe, other gases in the air are filtered out through the liquid storage box, and remaining oxygen enters the filter box body. Then zinc powder can be fully subjected to oxidation reaction, so that the situation that the zinc powder cannot be fully oxidized due to thefact that other gases react with the zinc powder is avoided, oxygen enters the calcining box through an adsorbent layer and a connecting pipe, the oxidation reaction speed can be increased, and thusthe zinc oxide production speed is increased.

The invention relates to a high-softening-point asphalt preparation method suitable for asphalt-based spherical activated carbon raw materials, special asphalt with the softening point of 130-220 DEGC is used as a raw material, a synergistic effect of negative pressure extraction and thermal polymerization reaction is utilized, a double-screw extruder with a certain number of vacuumizing ports isadopted, and the molecular weight distribution, softening point, group composition and other physical and chemical properties of high-softening point coal asphalt can be adjusted by adjusting the temperature and the extrusion speed of each temperature zone of the double-screw extruder, the number, the setting positions and the vacuum degrees of the vacuumizing ports. The softening point of the prepared high softening point asphalt is 240-280 DEG C, the content of n-heptane soluble substances is lower than 10%, the content of toluene soluble substances is lower than 30%, the content of quinoline insoluble substances is higher than 35%, the content of pyridine insoluble substances is higher than 20%, and the ash content is 0.02-8%. The high-softening-point asphalt preparation method has important significance for promotion of resource reutilization of the special asphalt and the asphalt-based spherical activated carbon and related materials (such as asphalt-based foam carbon).

An ozone oxidative decomposition treatment method for VOCs and/or gas phase inorganic reducing compounds in gas is provided which, being a method that uses a high silica adsorbent to perform oxidativedecomposition treatment of VOCs, etc., with ozone, further improves efficiency of oxidative decomposition reaction with ozone, can perform efficient decomposition treatment even of substances at lowconcentrations such as VOCs and malodorous substances in a high air-flow discharge gas, and which can also reduce the amount of ozone used. When adding and mixing an ozone gas with a gas containing VOCs, then contacting the mixture with a high silica adsorbent, which is a filled porous body, and performing decomposition treatment on the VOCs by ozone oxidation, the aforementioned high-silica adsorbent is the base material in the fill material, and as the base material, a porous substance is used which supports fine particulate powder of a transition metal-containing oxide having a BET specificratio surface area of 80m<2> or greater.

The invention discloses a kiln catalytic combustion method and device which can be applied to kilns taking heavy oil, or pulverized coal or biomass as fuel. The method is characterized in that a water electrolyzing oxyhydrogen gas pipeline is additionally arranged on a blast pipeline of a kiln, oxyhydrogen gas generated by a water electrolyzing oxyhydrogen generator is mixed with air according to the proportion of 0.1% to 0.3%, and the mixture is blown into a kiln hearth to serve as a combustion catalyst from the bottom and one side surface of the kiln hearth. The device comprises the kiln hearth, wherein a grate is arranged in the kiln hearth; the blast pipeline is mounted under and on one side face of the grate; a blower is arranged at the tail end of the blast pipeline; the water electrolyzing oxyhydrogen gas pipeline is arranged in the middle section of the blast pipeline; a valve is arranged at the front end of the water electrolyzing oxyhydrogen gas pipeline; and the water electrolyzing oxyhydrogen generator is arranged at the tail end of the water electrolyzing oxyhydrogen gas pipeline. As the mixture obtained by mixing the oxyhydrogen gas generated by the water electrolyzing oxyhydrogen generator and air according to the proportion is added in the combustion process of the kiln to serve as the combustion catalyst, and enters the combustion space of heavy oil, or pulverized coal or biomass for mutual combustion, the combustion efficiency of the fuel can be improved.

The invention relates to a pyrolysis gasification tar conversion and utilization device and method. The device comprises a reaction cavity (1), an airflow mixer (2), a heat exchange unit (15) and a deslagging unit (16), The section of the reaction cavity is gradually expanded, and a pore plate (11) is arranged in the reaction cavity and extends downwards along the tube wall of the reaction cavity; A Brown gas channel (12) and a Brown gas nozzle (13) are arranged at the upper end of one side of the reaction cavity; The airflow mixer is arranged below the Brown gas channel and comprises a to-be-treated gas inlet, an oxidant inlet and a mixed gas outlet; A baffle plate (14) is arranged at the rear end of the pore plate and extends downwards along with the pore plate; A heat exchange unit (15) is arranged between the baffle plate and the side wall of the other side of the reaction cavity; And the lower end of the other side of the reaction cavity is connected with a deslagging unit (16). The problem that tar in the pyrolysis gasification gas is not easy to remove and purify can be solved, the tar content of the pyrolysis gasification gas can be reduced, and the energy utilization rate can be increased.

The invention discloses an adsorbent for adsorbing mercury in smoke and a preparation method of the adsorbent. The adsorbent comprises the following components in parts by weight: 20-30 parts of semicoke powder, 5-10 parts of ferric trichloride, 10-25 parts of copper oxide, 40-60 parts of aluminium oxide and 1-5 parts of titanium dioxide. The preparation method comprises the following steps: (a) grinding the semicoke powder into particles of 100-200 meshes, preparing ferric trichloride into a water solution, soaking the semicoke powder into the ferric trichloride water solution for 10-15h; (b) pulping pseudo-boehmite, titanium dioxide precursor and copper oxide precursor according to the weight parts for mixing; (c) sufficiently mixing the semicoke particles obtained by the step (a) with the pulp obtained by the step (b), and drying the obtained mixture; and (d) roasting the dried particles at temperature 300-500 DEG C, and cooling to obtain the adsorbent, wherein the adding amount of pseudo-boehmite is calculated on the basis of that of aluminium oxide, and the adding amount of the titanium dioxide precursor and the copper oxide precursor is calculated on the basis of that of titanium dioxide and copper oxide respectively. The mercury adsorbing rate of the adsorbent can reach 95%, and good regenerability is obtained.

The invention relates to a method for producing mono-hydrogen peroxide diisopropylbenzene, which solves problems of high additive cost and low product yield in the prior art. According to the invention, the problems are preferably solved through the adoption of the technical scheme as follows: raw materials diisopropylbenzene and air react with each other under conditions that the reaction temperature is 60-240 DEG C, the reaction pressure is 0.2-1.6 MPa, the weight ratio between the diisopropylbenzene and the air is (10-20):3 and the pH value of the reaction materials is 1.0-3.0 or 10.0-13.8, so as to obtain the mono-hydrogen peroxide diisopropylbenzene; and the method for producing the mono-hydrogen peroxide diisopropylbenzene, provided by the invention, can be used for the industrial production of the mono-hydrogen peroxide diisopropylbenzene.

The invention relates to the technical field of intravenous drip nursing in the department of cardiology, and discloses a nursing device for intravenous drip injection in the department of cardiology, which comprises a frame body, a gravity spring is fixedly connected to the bottom of the inner wall of the frame body, a bottom plate is fixedly connected to the top end of the gravity spring, and a medicine bag hanger is fixedly connected to the top of the bottom plate. Warming boxes are fixedly connected to the positions, located on the two sides of the medicine bag hanging frame, in the frame body, the interiors of the warming boxes are slidably connected with air inlet plates, and a ringing device used for alarming and prompting is arranged at the position, located above the telescopic column, in the frame body. According to the nursing device for intravenous drip injection in the cardiology department, the height of a lower bottom plate of a medicine bag hanging frame is controlled through the gravity of a medicine bag, an air inlet plate and a ringing device are satay, and when the air inlet plate moves in an incubator, iron powder in the air inlet plate and activated carbon make contact reaction with oxygen with different contents, so that the effect of heating the medicine bag is achieved; the problem that ice-cold liquid enters a human body to cause discomfort is avoided.