31results about How to "Improved mass transfer resistance" patented technology

The invention relates to a stable gas membrane used for removing, recovering, and gathering ammonia or organic amine from dosage liquor or wastewater. The gas membrane comprises a membrane shell, hollow fibrous membranes (A) and hollow fibrous membranes (B). A cavity is provided in the middle of the membrane shell. An inlet and an outlet are respectively arranged on each of the two ends of the membrane shell. The hollow fibrous membranes (A) and the hollow fibrous membranes (B) are positioned in the cavity of the membrane shell. A shell pass outlet communicating with the atmosphere is arranged on a lower end of the membrane shell. The hollow fibrous membranes (A) and the hollow fibrous membranes (B) are uniformly arranged in the membrane shell with regular spaces. Dosage liquor or wastewater containing ammonia or organic amine is delivered through the tube pass of the hollow fibrous membranes (A), and absorption liquid is delivered through the tube pass of the hollow fibrous membranes(B). With the gas membrane provided by the invention, problems of traditional gas membranes of leakage and low service life are overcome; dilution of a byproduct ammonium salt solution caused by a concomitant osmotic distillation phenomenon can be effectively inhibited; ammonium salt concentration of the byproduct ammonium salt solution can be increased from 10-20% to 20-40%; mass transfer coefficient at the acid absorption liquid side can be substantially improved; the ammonia removing efficiency is high; the ammonia removing effect is stable for a long-term; and the service life of membranesets can be improved by 3-10 times than common gas membranes.

The invention provides a fume purification system based on advanced oxygenation combining wet scrubbing. The system is a combustion and exhaust system formed by a boiler, an ozone generator, a stirrer, a swirl nozzle, a reactor, a gas-liquid absorption tower and a chimney, wherein fume containing sulfur oxide, nitric oxide and mercury generated by combustion of the boiler and O3 generated by the ozone generator enter the stirrer together, are mixed, flow through the swirl nozzle, and are sprayed into the reactor with an ultraviolet lamp tube; and hydroxyl radical (.OH) with strong oxidability generated under excitation of ultraviolet radiation, SO2 in the fume, indissoluble NO and HgO are oxidized into gaseous products with higher dissolubility and enter the gas-liquid absorption tower to be absorbed and removed by water; Hg<2+> generated in the gas-liquid absorption tower captures and retrieves mercuric sulfide by adding sulfidion S<2-> in equal molar ratio; and the residual sulfuric acid and nitric acid mixed solution is used as an industrial raw material for recycling, and the cleaned fume enters the chimney so as to be exhausted.

The invention discloses a system for deep treatment of coking wastewater by means of catalytic ozonation-ceramic membrane filtration, mainly consisting of an ozone generator, an ozone oxidation reactor, a booster pump, a ceramic membrane component, a gas-liquid separator, a tail gas absorbing device, a wastewater reflowing pump, a catalyst reflowing pump, a catalyst adding pump, a catalyst outflowing groove, a catalyst adding groove and corresponding pipe fittings, valves and instruments. According to the system, the application of a powder catalyst in a dynamic reactor can be realized due tothe combination of the catalytic ozonation and the ceramic membrane separation; the ozonation and the catalytic ozonation can be guaranteed to be carried out in a single reactor in a segmental way due to the convection current of the reflowing wastewater and the catalyst slurry and the impact of upcurrent; the mass transfer resistance when the ozonation and the catalytic ozonation are independently used can be reduced; the use ratio of hydroxyl free radical and the removal rate of organic matters can be improved; the aims, such as the COD (chemical oxygen demand), the chroma and the turbidityof the deeply-treated coking wastewater, can be achieved; and the problems that the activity is suddenly reduced when the powder catalyst is formed into particulates, the running needs to be suspended when the mass transfer resistance is increased due to the use of the particulate catalyst and the particulate catalyst is changed and the like can be solved.

The invention relates to equipment for treating refractory wastewater, and in particular relates to a reaction device with Fenton treatment on biomembrane deposited iron and a recovered hydrogen peroxide solution in combination with plasma and microbe actions, and an implementation method of the reaction device. The reaction device comprises a contact glow multi-electrode plasma reactor, a hydrogen peroxide content control system and a deposited iron biomembrane reaction tank. The implementation method comprises three stages, wherein the first stage is a biomembrane forming stage, the second stage is a hydrogen peroxide generation stage (primary treatment stage), and the third stage is a pollutant collaborative degradation stage. According to the reaction device and the implementation method, the hydrogen peroxide generated by the primary treatment is recycled, so that the hydrogen peroxide is unlikely to pollute the environment and cause harm to human health while the economical benefit is improved. Moreover, a carrier surface treated by plasmas generates a lot of polar functional groups to ensure that the hydrophilic property of the carrier surface is generally improved.

The invention discloses a rotary type hollow fiber porous membrane foamless oxygen charging device and method. The device comprises a rotary foamless membrane type oxygen charging assemble, an air supplying and exhausting system, a water supplying and draining system and a motor and electrical control system. In the method, the raw water is added in an activated sludge aeration basin, the rotary foamless membrane type oxygen charging assemble rotates in the aeration basin at the speed of several to tens revolutions per minute, the oxygen charging adopts the intermittent air charging and discharging way, the air feeding pressure is controlled under the bubble point of the fiber membrane, the oxygen is dissolved rapidly on the membrane surface and is dispersed into the sludge water under the drive of the concentration difference and the pressure difference, the dissolved oxygen concentration is kept at 1 to 2.5 mg/l, the rotary oxygen charging assemble play the role of the mixing and activated sludge stirring. Compared with the traditional aeration method, the invention has high oxygen transmissibility, good oxygen charging effect, little oxygen charging amount, lower energy consumption, little membrane pollution, and convenient change and maintenance, and is very suitable for the upgrading and reforming of the activated sludge aeration basin in the sewage treatment technology.

The invention discloses an L-lactic acid fermentation method by using polyvinyl alcohol to solidify rhizopus oryzae. The method comprises the following steps: heating polyvinyl alcohol and sodium alginate in a boiling water bath to be jointly dissolved; mixing with a rhizopus oryzae spore suspension; using an injector to drip the mixed solution to a saturated boric acid solution containing calcium chloride while using a magnetic stirrer to continuously stir so that particles are spherical and good immobilized particles can be hardened at a low temperature; and then, treating by a monobasic sodium phosphate solution and washing with distilled water after solidified cells are propagated and grow so as to be used for the batch fermentation and the repetitive batch fermentation of the L-lactic acid. The improved L-lactic acid fermentation method by using the polyvinyl alcohol to solidify the rhizopus oryzae overcomes the defects of spherical carriers and poor permeability of the prior polyvinyl alcohol and has the advantages of great mechanism strength, large acid production amount, high acid production speed and good repetitive use effect.

The invention discloses a method for extracting astragaloside and astragalus polysaccharide under assistance of steam explosion to fundamentally eliminate the influence of a compact structure of cellwalls of radix astragali on dissolution of effective ingredients of radix astragali and improve the dissolution efficiency of a radix astragali extract. The method comprises steps as follows: the radix astragali material is put in a steam explosion pot after being rehydrated, saturated steam is introduced, certain pressure is kept, and pressure relief is performed after a period of time; a raw material after steam explosion is collected and subjected to extraction with hot water, a water extraction solution is subjected to precipitation separation extraction with ethanol, astragaloside and polysaccharide are obtained, and astragalus polysaccharide and astragaloside are obtained respectively after separation purification of a precipitate and a liquid supernatant. The steam explosion technology is used for treating the radix astragali, so that the material is subjected to hemicellulose decomposition, softening and partial dissolution of lignin as well as fiber structure loosening, the cell walls of radix astragali are effectively damaged, an obvious porous structure is formed, the dissolution rate of the effective ingredients is increased without damaging the structure and activity of the ingredients. Compared with conventional crushing extraction, the method has the advantages that the yields of astragaloside and astragalus polysaccharide are increased by 2.8 times and 4.5 timesrespectively, and the extraction time is shortened by at least one half.

The invention discloses a method for enhancing and promoting electroreduction of carbon dioxide to generate carbon monoxide through an external magnetic field, which provides the Faraday efficiency of applying external magnetic fields with different intensities to promote the electroreduction reaction of carbon dioxide to generate carbon monoxide, and obviously increases the current. According to the method, a metal organic framework material containing nickel metal is used as a magnetic response catalyst, a catalytic active center can exist, and response can be generated to an external magnetic field. According to the method, the energy utilization rate can be obviously increased, energy loss is reduced, the energy conversion efficiency is improved, and the method has wide application prospects in the energy field.

The invention relates to a plant water-saving antitranspirant and a preparation method thereof, and belongs to the technical field of plant water-saving agents. The plant water-saving antitranspirantis capable of using a wax layer of ammopiptanthus mongolicus skin to combine with n-dodecyl alcohol, n-hexadecyl alcohol and aromatic alcohol, and is sprayed on the leaf surface to form a layer of a transparent molecular film, so the mass transfer resistance of water gas-liquid transmission is increased, the antitranspirant achieves the effect of a vapor exchange energy barrier and has the stronginhibition and water retaining effect, the antitranspirant can be rapidly and autonomously spread out to form the molecular film after sprayed on the leaf surface, and a leaf surface water evaporationrate can be effectively delayed. The plant water-saving antitranspirant is capable of using drought-resisting stress-resisting natural substances, such as more than ten types of amino acids and alkaloid contained in the ammopiptanthus mongolicus, to combine with a drought-resisting element, keeping and improving the plant cellular affinity and water retaining capacity, preventing the cell dehydration, enabling plant cells to have the apparent drought-resisting capacity, reducing the plant water transpiration, remarkably increasing the chlorophyll content, improving the photosynthesis, enhancing the plant enzyme system physiological activity, and stimulating the growth of a plant root system.

The invention discloses a roughness-controllable silicon wafer roughening solution without microscopic surface sharp corners, which comprises the following main components: an inorganic acid, an oxidant, a fluorine-containing compound, a buffer agent, a long-chain organic matter and water. By adjusting the addition amount of each component, the surface roughness of an etched silicon wafer can be controlled, and no microcosmic sharp corner is generated on the surface of the etched silicon wafer.

The invention relates to a plant extract and application thereof, in particular to a composition containing a pitaya extract and application thereof. The composition comprises the pitaya extract and urtica fissas split-ring lignan F, wherein the pitaya extract is extracted by an imidazole ionic liquid aqueous solution. Particularly, a preparation method of the pitaya extract includes the steps that pitaya peel is provided; pitaya powder is obtained; an extraction technology is conducted, wherein the extraction technology includes the steps of mixing, extraction, refrigerated centrifugation, filter pressing and chromatographic separation; then, a fifth fraction is collected and concentrated to constant weight to obtain the pitaya extract. The pitaya extract in the composition is rich in pitaya general flavone; through compatibility of urtica fissas split-ring lignan F, the activity of lysozyme, the mass concentration of albumin, the mass concentration of C3 and the activity of superoxide dismutase in serum during immunization are significantly improved, growth and development of the immune organs can be promoted to a certain extent, and the human body immune functions are significantly improved.

The invention discloses an anticorrosive chromium-free passivating agent for a battery steel shell and a preparation method of the anticorrosive chromium-free passivating agent for the battery steel shell. The anticorrosive chromium-free passivating agent is prepared from, by mass, 5-15 parts of sodium bisulfite, 5-10 parts of titanyl nitrate, 1-5 parts of epoxy silane, 3-11 parts of tartaric acid, 1-5 parts of citric acid, 2-8 parts of sodium benzoate, 2-8 parts of acetic anhydride, 4-8 parts of tetramethyl orthosilicate, 1-5 parts of diamido-di-imidole, 0.2-1.6 parts of linolenate, 3-7 parts of tetraethyl orthosilicate, 2-5 parts of vanadate, 2-6 parts of surfactant and 30-60 parts of water. The passivating agent can form a compact film structure on the surface of the battery steel shell, the surface of the steel shell is smooth and compact, porosity is remarkably reduced, the corrosion potential is increased, corrosion current is reduced, the potential range of an anodic passivation area is widened, the mass transfer resistance is remarkably increased, and the corrosion-resistant performance is remarkably superior to the corrosion-resistant performance of a current passivated steel shell.

The invention discloses a high-selectivity nanofiltration membrane. The surface of the nanofiltration membrane is grafted with a micromolecular amino aromatic compound containing a chelating group; optionally, the small-molecule amino aromatic compound is further chelated with metal cations through the chelating group of the small-molecule amino aromatic compound. The membrane has a high lithium-magnesium separation factor, shows good magnesium-lithium separation efficiency and lithium extraction efficiency, and has a good application prospect in the field of salt lake lithium extraction. The invention further relates to a preparation method and application of the nanofiltration membrane.