38results about How to "Reduce mass transfer rate" patented technology

The invention discloses a device and a method for cooperatively removing gaseous pollutants by plasma-supergravity coupling. According to the device and the method disclosed by the invention, multiple gaseous pollutants are decomposed and oxidized by using high-energy electrons and active groups generated by low-temperature plasma discharge; in a process that the gaseous pollutants flow through a solid adsorbent reactor rotating at high speed, gas containing the pollutants are in sufficient contact with a solid adsorbent by means of a supergravity effect generated by high-speed rotation of gas and solid, to generate a gas phase-solid phase adsorption and chemical reaction to finish substance conversion and purification processes between multiple gaseous pollutants and the solid adsorbent, and thus the pollutants are converted into non-toxic and pollution-free substances. The device and the device are applicable to dry-process combined removal of multiple pollutants in flue gases and various wastes gas generated by combustion, gasification, incineration and the like in the fields of energy resources, chemical engineering, building materials, metallurgy and the like containing multiple gaseous pollutants.

A gas separation unit for the separation of carbon dioxide from air is proposed for use in a cyclic adsorption / desorption process and using a loose particulate sorbent material. Sorbent material is arranged in at least two stacked layers, and each layer comprises two sheets of a flexible fabric material which is gas permeable but impermeable to the loose sorbent material. The sheets are arranged parallel defining an inlet face and an outlet face, are arranged with a distance in the range of 0.5-2.5 cm, and are enclosing a cavity in which the sorbent material is located. Said layers are arranged in the unit such that the inflow passes through the inlet face, subsequently through the particular sorbent material located in the cavity of the respective layer, subsequently to exit the layer through the outlet face to form the gas outflow.

The invention discloses photocatalyst-supported hydrogel as well as a preparation method and an application thereof and belongs to the field of environment function materials and catalysis. The photocatalyst-supported hydrogel comprises a conventional hydrogel composite conductive material and a photocatalysis material, wherein conventional hydrogel comprises acyclic acid / acrylamide hydrogel and can also be hydrogel formed through polymerization of other monomers. The conductive material comprises graphite, graphene and the like, and a photocatalyst can comprise bismuth oxychloride, titanium dioxide and the like. Bismuth oxychloride is immobilized, and the photocatalysis properties of bismuth oxychloride and electrical stimulation responsiveness of the hydrogel are combined. The conductive material in the compound hydrogel can transfer photo-induced electrons produced by bismuth oxychloride under illumination, the mass transfer rate between a catalyst and a pollutant cannot be affected, and the photocatalysis performance of bismuth oxychloride is improved. The synthesis method is simple and efficient, can realize industrial production and can be used for degrading atenolol, other medicines, personal care products and other organic pollutants in water.

A gas separation unit for the separation of carbon dioxide from air is proposed for use in a cyclic adsorption / desorption process and using a loose particulate sorbent material. Sorbent material is arranged in at least two stacked layers, and each layer comprises two sheets of a flexible fabric material which is gas permeable but impermeable to the loose sorbent material. The sheets are arranged parallel defining an inlet face and an outlet face, are arranged with a distance in the range of 0.5-2.5 cm, and are enclosing a cavity in which the sorbent material is located. Said layers are arranged in the unit such that the inflow passes through the inlet face, subsequently through the particular sorbent material located in the cavity of the respective layer, subsequently to exit the layer through the outlet face to form the gas outflow.

A device for removing nitrogen through bio-autotrophic denitrification belongs to the technical field of water purification and comprises a drug dissolving pool, a dosing pump, a nitrogen polluted water inlet pump, an upflow anaerobic sludge bed and a nitrogen escape outlet, wherein sodium thiosulfate is dissolved in the drug dissolving pool; the bottom of the drug dissolving pool is connected with the inlet pipe of the dosing pump; the outlet pipe of the dosing pump is connected with the inlet pipe of the nitrogen polluted water inlet pump; the outlet pipe of the nitrogen polluted water inlet pump is connected with the water inlet at the bottom of the upflow anaerobic sludge bed; and the nitrogen escape outlet is arranged at the top of the upflow anaerobic sludge bed to discharge gases. Without adding organic matters, the device removes the nitrate nitrogen in the nitrogen polluted water and simultaneously avoids the problem of possible accumulation of intermediate products of nitrites in the nitrate nitrogen reduction process.

The invention described herein relates to a process for the catalytic epoxidation of olefins with hydrogen peroxide in a multiphase reaction mixture comprising an liquid aqueous hydrogen peroxide rich phase containing an organic solvent having a solubility in water of at least 10 % by weight at 25 DEG C and an liquid organic olefin rich phase.

The invention provides an erosion-resistant castable for a steel ladle and a use method of the erosion-resistant castable. The technical scheme of the erosion-resistant castable is as follows: 45wt%-65wt% of corundum particles, 10wt%-25wt% of fine corundum powder, 10wt%-20wt% of alumina-magnesia spinel, 3wt%-5wt% of aluminate cement and 4wt%-8wt% of activated aluminium oxide micropowder are taken as raw materials, 0.1wt%-0.3wt% of a polycarboxylic acid dispersing agent and 0.1wt%-5wt% of micron-size magnetic particles are also added, the materials are mixed, 4wt%-5wt% of water is further added, all the materials are stirred and subjected to casting moulding, demoulding and roasting, and a castable green body is prepared; the micron-size magnetic particles and tertiary butanol in a mass ration being 1:(1-3) are blended and stirred uniformly, and a magnetic particle coating is obtained; the castable green body is coated with the magnetic particle coating, the coating layer thickness of the magnetic particle coating is 0.1-1 mm, then the castable green body is roasted for 20-24 h at the temperature of 80-110 DEG C, and the erosion-resistant castable for the steel ladle is obtained. The product has the characteristics of being capable of cleaning molten steel, good in slag resistance, resistant to erosion and long in service life.

The invention provides a method for preparing an acid liquid system. The method comprises the following steps: 1) adding a thickening agent into a hydrochloric acid solution at a first stirring speed,and stirring at a second stirring speed to obtain a first acid liquid; 2) sequentially adding an iron ion stabilizer, a corrosion inhibitor and a demulsification cleanup additive into the first acidliquid, uniformly stirring at a third stirring speed, and standing to obtain a base solution; and 3) adding a tackifier into the base solution, and stirring at a fourth stirring speed to obtain the acid liquid system.

The invention relates to a photolytic peroxide up and down counter spray atomizing bed desulfurization and denitrification method. The method mainly comprises an emission source, a fan, a dust remover, a gas cooler, an up and down counter spray atomizing bed, a circulating pump I, a circulating pump II, a filling layer, an ultraviolet tube, atomizing nozzles, a demister, a liquid storage tank and a product after-processing system. SO2 and NO from the emission source react with sulfate radicals and hydroxyl radicals generated by decomposing peroxides through ultraviolet to produce sulfuric acid and nitric acid solutions applicable to resource utilization. The photolytic peroxide up and down counter spray atomizing bed desulfurization and denitrification method can effectively remove the SO2 and NO in flue gas and avoid secondary pollution during removal, and achieve a novel flue gas purification system having a broad application prospect.

The invention discloses a gypsum crystallization modifier suitable for wet type calcium-based desulphurization of a thermal power generating unit, and the gypsum crystallization modifier can effectively eliminate the impact of heavy metal ions and oil contaminations in gypsum slurry on gypsum crystallization process to obtain gypsum crystals with coarse and large particles and low water content, increases stability of the desulfurization system, and belongs to the technical field of environmental protection. The gypsum crystallization modifier comprises the following components by weight: 0.1-5% of an oil-removing agent, 85-95% of a metal complexing agent and 5-10% of a surfactant, and is characterized in that the gypsum crystallization modifier can be directly added into an absorption tower or an absorption tower filtrate pit, then mixed evenly and dissolved for pumping. The gypsum crystallization modifier can accelerate the oxidation of sulfites and the gypsum crystallization process, is appropriate to improve the efficiency of the desulfurization system. In the embodiment, the gypsum crystallization modifier concentration is increased from 0% to 0.1%, the by-product gypsum purity is improved from 78% to 93%, the gypsum water content is reduced from 19% to 10%, the crystal size distribution is more uniform, acicular gypsum crystals are decreased, rhombic crystal share and columnar crystal share increase, the crystal specific surface area increases, and the gypsum dewatering performance is better.

The present invention discloses a growth device and process of a silicon vapor epilayer and aims at providing a growth device and a process with homogeneous epilayer, convenient operation and high efficiency. The growth device includes a base body, a fixing slot on the base body, a step of 1-3mm wide on the edge of the fixing slot bottom, an annular groove of 1-3mm deep on the step and an arcual concave of 1-5mm deep below the step. The top of the annular groove is 1-3mm wide. The growth process includes the following steps: the silicon substrate wafer is positioned in the fixing slot with the upper surface of the substrate wafer 0.1-1mm lower than the upper surface of the base, and the epilayer grows. This invention has simple arts and crafts, provides homogeneous epilayer, controls the distribution area of the slip lines and removes the contaminative layer of metal impurities on the surface, improving the quality of the silicon epilayer and ensuring the performance of the product.

The invention relates to an erosion-resistant brick for a steel ladle and a use method thereof. According to the technical scheme, the erosion-resistant brick is prepared by uniformly mixing raw materials, namely, 41-62wt% of modified corundum granules, 25-35wt% of corundum fine powder and 10-25wt% of alumina-magnesia spinel fine powder, adding another raw material, namely, 3-5wt% of phenolic resin, mixing and grinding, molding, and by keeping the temperature for 20-24 hours at 150-200 DEG C to obtain the erosion-resistant brick for the steel ladle. A preparation method of the modified corundum granules comprises the following steps: dispersing micron-order magnetic particles and a dispersing agent into absolute ethyl alcohol in a mass ratio of 1:(1-2):(1-2), so as to obtain a magnetic particle dispersed liquid; and soaking corundum granules into the magnetic particle dispersed liquid in a mass ratio of 1:(1-3) for 1-3 hours, and baking for 12-24 hours at 80-200 DEG C to obtain the surface modified corundum granules. The erosion-resistant brick has the characteristics of being good in molten steel cleanliness, good in slag resistance, good in erosion resistance and long in service life.

The invention belongs to a method for synthesizing an epoxy compound through a saponification process, and specifically relates to a clean saponification method for generating corresponding epoxy compounds with powdery alkali (quick / slaked lime or caustic soda) and chlorohydrin (monochloropropanol or dichloropropanol) through a dehydrochlorination reaction under the action of microwave. According to the invention, the powdery alkali (quick / slaked lime or caustic soda) and the chlorohydrin (monochloropropanol or dichloropropanol) are used for the dehydrochlorination reaction, so the usage amount of process water in the process of chlorohydrin saponification is reduced; meanwhile, the concentration of a generated saponified solution is greatly improved; thus, the recovery of salt and the recycling of water in the saponified solution can be realized under low energy consumption. The method provided by the invention does not discharge salt containing saponified wastewater in the process of production, and achieves the purposes of energy conservation and emission reduction.

The invention discloses an extraction method of the nutrients in leaf lettuce, which belongs to the extraction of the organic nutrients of plants. The method comprises the steps that: edible leaf lettuce serve as a raw material, is dried, crushed and sieved; carbon dioxide supercritical extraction is carried out to the treated raw material by the set extraction temperature and extraction pressureintensity, and the raw material is separated in the carbon dioxide supercritical extraction at set separation temperature; after carbon dioxide supercritical extraction is started, the separated extract is collected at certain time interval, and the extract which is obtained by collection for twice to three times is the nutrients in the leaf lettuce. According to the method, because carbon dioxide supercritical extraction is adopted, the extraction temperature is low, and the bio-active substances which are extracted do not lose activity; and because no complicated extraction reagent is adopted, the extract is ensured to be purely natural and has no pollution.

The invention provides a slurry bed liquid phase hydrogenation catalyst and an application thereof. The catalyst adopts one or a combination of more than one of noble metals Pd, Pt and Rh as a main active component, the carrier of the catalyst is mainly a nitrogen-containing silicon oxide carrier, the average pore diameter of the catalyst carrier is more than 10 nm, and the pore volume of the catalyst carrier is not higher than 0.7 cc / g. The introduction of an amino group to the carrier greatly increases the dispersity of the noble metal(s), so the hydrogenation activity is improved, and the use amount of the noble metal(s) is reduced; and the modification of the surface of the nitrogen-containing silicon oxide carrier with the amino group further improves the desorption of a hydrogenationintermediate, thereby the selectivity, activity and stability of anthraquinone hydrogenation are improved. The catalyst of the invention can be used in the process of catalytic hydrogenation of anthraquinone in a slurry bed to produce hydrogen peroxide, and the hydrogenation catalyst has a very high hydrogenation activity and good stability at a reaction temperature of 40-60 DEG C under a pressure of 0.05-0.3 MPa and at a liquid space velocity of 60-300 h<-1>.

The invention discloses a liquid-liquid mixing device and a mixing method. The liquid-liquid mixing device comprises oil-water micro-channel mixing equipment, water-oil micro-channel mixing equipment and a material homogenizer; a lipophilic liquid-phase raw material and a hydrophilic liquid-phase material are mixed through oil-water microchannel mixing equipment according to the proportion being larger than or equal to 1 to form an oil-water mixed material, and the lipophilic liquid-phase material and the hydrophilic liquid-phase material are mixed through water-oil microchannel mixing equipment according to the proportion being smaller than or equal to 1 to form a water-oil mixed material; and the oil-water mixture and the water-oil mixture are homogenized by a material homogenizer and then are used as liquid-liquid reaction feedstock. The liquid-liquid mixing device provided by the invention strengthens the mixing and dispersion between liquid drops from the microscopic level, so that liquid-phase reactants form uniformly-mixed, uniformly-dispersed and stable-mixed-state feeding materials, improves the mixed dispersion state of immiscible or difficult interphase solutions, and is suitable for the liquid-liquid two-phase or multi-phase mixed reaction process.

A method for separating hydrolysis product of biomass is provided. The method includes providing a mixture solution containing a hydrolysis product of biomass and a divalent metal salt, adjusting the pH value of the mixture solution to between 1-4.6, and performing a filtering procedure on the mixture solution using a nanofiltration membrane to obtain a concentrated solution and a filtrate, wherein the concentrated solution mainly includes the hydrolysis product of biomass and the filtrate mainly includes the divalent metal salt.

The invention relates to a defective metal-organic framework desulfurization adsorbent and a preparation method and application thereof. The preparation method comprises the following steps: dissolving trimesic acid and 5-hydroxyisophthalic acid in a solvent, and carrying out ultrasonic treatment to obtain a mixed solution I; uniformly mixing the mixed solution I with copper nitrate trihydrate to obtain a mixed solution II; and then carrying out microwave-assisted synthesis on the mixed solution II to obtain the defective metal-organic framework desulfurization adsorbent. Hydroxyisophthalic acid is introduced in the synthesis process to modify synthesized HKUST-1, microwave-assisted synthesis is adopted to rapidly prepare the defective-metal organic framework, the defective metal organic framework can be rapidly synthesized through the method, meanwhile, the defective metal organic framework has the high crystallinity and the micro-medium hierarchical pore structure, the whole preparation process saves energy consumption and is environmentally friendly, high adsorption sulfur capacity is kept in fixed bed adsorption, and the preparation method is suitable for high-efficiency removal of sulfides in oil products.

The invention discloses an olefin hydration reaction method which comprises the following steps: arranging a plurality of catalyst bed layers in an olefin hydration reactor, and dividing reaction mixed raw materials into a feed I, a feed II and a feed III; a feed I enters a first catalyst bed layer from the bottom of the olefin hydration reactor, a feed II is divided into x strands after being mixed and dispersed and is introduced into different bed layers from the catalyst bed layers, a feed III is divided into y strands after being mixed and dispersed and is introduced into different bed layers from the catalyst bed layers, and at least one strand of material in the x strands of the feed II and at least one strand of material in the y strands of the feed III are introduced into the same bed layer; all the fed materials are subjected to an olefin hydration reaction in the catalyst bed layer, and a final product flows out from the top of the reactor. According to the method disclosed by the invention, two reaction raw materials with different proportions are introduced between catalyst bed layers, so that the main reaction effect is enhanced, efficient mass transfer between olefin and water is realized, the olefin hydration reaction rate and the raw material per pass conversion rate are greatly improved, the number and the volume of reactors are reduced, and the energy consumption in the separation process is reduced.

The invention discloses a device and a method for cooperatively removing gaseous pollutants by plasma-supergravity coupling. According to the device and the method disclosed by the invention, multiple gaseous pollutants are decomposed and oxidized by using high-energy electrons and active groups generated by low-temperature plasma discharge; in a process that the gaseous pollutants flow through a solid adsorbent reactor rotating at high speed, gas containing the pollutants are in sufficient contact with a solid adsorbent by means of a supergravity effect generated by high-speed rotation of gas and solid, to generate a gas phase-solid phase adsorption and chemical reaction to finish substance conversion and purification processes between multiple gaseous pollutants and the solid adsorbent, and thus the pollutants are converted into non-toxic and pollution-free substances. The device and the device are applicable to dry-process combined removal of multiple pollutants in flue gases and various wastes gas generated by combustion, gasification, incineration and the like in the fields of energy resources, chemical engineering, building materials, metallurgy and the like containing multiple gaseous pollutants.

The invention belongs to a method for synthesizing an epoxy compound by adopting a saponification method and specifically relates to a clean saponification method for generating the corresponding epoxy compound by performing dehydrochlorination reaction on powder alkali (quick lime / slaked lime or caustic soda) and chlorohydrin (mono-chloropropanol or dichloropropanol) under an ultrasonic effect. According to the invention, the powder alkali (quick lime / slaked lime or caustic soda) and chlorohydrin (mono-chloropropanol or dichloropropanol) have a dehydrochlorination reaction, so that the dosage of process water in the chlorohydrin saponification process is greatly reduced, the concentration of the generated saponification solution is greatly increased, the recycling of byproduct salt and the recycling of water can be realized under the condition of lower energy consumption, and thus the purposes of saving energy and reducing emission can be achieved.

The invention discloses a composite osmotic acid solution and a preparation method thereof, and the composite osmotic acid solution comprises: hydrochloric acid with a content of 5-20%; the content of the thickening agent is 0.1%-3.0%; the content of the penetrating agent is 0.3 percent to 5.0 percent; the content of the retarder is 1.0%-20%; the content of the corrosion inhibitor is 1.0%-10.0%; the content of the iron ion stabilizer is 1.0%-3.0%; the content of the demulsification cleanup additive is 0.5%-3.0%; the composite permeable acid liquor can overcome the problems of low acid liquor permeability, high acid liquor injection friction and high acid rock reaction speed in deep fracture-vuggy carbonate rock acid fracturing yield increase construction in the oil and gas development process.