212results about How to "Small air resistance" patented technology

The invention relates to a porous TiO2 fiber loaded noble metal formaldehyde room-temperature oxidation catalyst and a preparation method thereof. The porous TiO2 fiber loaded noble metal formaldehyde room-temperature oxidation catalyst comprises a porous TiO2 fiber carrier and noble metal active components which are dispersed in the carrier; the porous TiO2 fiber carrier is of a felt shape, and is formed by weaving the TiO2 fibers with the length of a plurality of microns; irregular pores with the pore diameter range of 2-1000nm are formed in the TiO2 fibers so as to form a graduation mesoporous-macroporous structure; and the noble metal exists in a zero valence form with the particle size range of 0.5-3nm. The porous TiO2 fiber loaded noble metal formaldehyde room-temperature oxidation catalyst provided by the invention is of a graduation mesoporous-macroporous structure; the active component noble metal has good dispersibility in the carrier, has the particle size of 1-3nm, and is zero valence; and formaldehyde can be subjected to catalytic decomposition at room temperature, and the catalytic activity is good, and the using quantity is less.

The invention relates to a filter membrane, which is formed by a metal organic framework material and a polymer. The invention also provides a method for preparing the filter membrane which is formed by the metal organic framework material and the polymer. The method comprises the following steps: the metal organic framework material and the polymer are contacted, and the filter membrane is formed by spinning or dip-coating. The invention also relates to an application of the filter membrane to filtering of PM2.5 and volatile organic compounds. The filter membrane has the advantages of high specific surface area, abundant surface function groups, high amount of porosity, light transmission, ventilation, etc., and the filter membrane is used for realizing high-efficiency filtering of PM2.5 and volatile organic compounds.

The present invention relates to the preparation of high activity TiO2 photocatalyst with porous ceramic base, and is especially the nano titania powder and titania sol combining process of preparing regenerable high activity nano titania carried in porous ceramic. The present invention prepares the high activity nano titania carried in porous ceramic through the combination of two carrying processes, titania powder sintering process and sol-gel process. The process includes preparing titania sol via sol-gel process, mixing titania sol and titania powder in certain ratio while stirring and adding dispersant and adhesive to form new solution, carrying the solution to the surface of porous ceramic, fumigating the carrying ceramic in water vapor atmosphere to eliminate most of the organic matters, and final sintering at high temperature for strong combination between nano titania and carrier and raised activity of titania.

The invention belongs to a technical field of waste gas treatment, in particular to a device used for treating the malodorous gas of municipal facilities and a method thereof. The device of the invention consists of a filter screen, a plasma reactor, a honeycomb activated carbon bed and a blower which are connected in sequence; wherein the plasma reactor adopts the structure form of a double medium barrier discharge plasma and is formed by the combination of a plurality of plasma reaction tubes; the honeycomb activated carbon bed is an absorption-catalysis oxidative bed and adopts the honeycomb activated carbon as a filling layer. The particles such as the dust in the waste gas are filtered out through the filter screen and enter into the plasma reactor, and a series of reactions occur to the malodorous matter in the bombardment of high energy electrons, and a little un-reacted malodorous matter is further treated through the honeycomb activated carbon bed. The blower which is arranged at the back of the device thus ensures the reaction device in negative pressure conditions so as to avoid the leakage of the malodorous gas. The device and the method provided by the invention have a large processing capacity of the malodorous gas and are high in processing efficiency.

A catalyst of removing the NOx, residual organic substance and CO from the oxygen-enriched tail gas from engine contains the porous inorganic carrier, silver, noble metal chosen from Au, Pt, Pd, Ph, Ir and Ru, and other metal chosen from Fe, Cu, Ti, Zr, Ba, Sn, W, Zn, Mo, Ce, Cs, La and Ca.

The invention discloses an impregnation preparation method of nanometer titanium oxide which takes shell powder as a carrier, and in particular relates to a reproducible porous nanometer titanium oxide powder which takes the shell powder as the carrier and the preparation method thereof. In the method, titanium oxide is loaded on a shell powder carrier by impregnation; firstly, alkoxide solution of titanium ester or titanium with appropriate concentration is prepared, then an activated shell powder carrier with certain proportion is impregnated in the alkoxide solution, then the obtained solution is stirred and stayed for a certain time, and treated by low temperature and abstersion pretreatment and finally roasted at high temperature, so the nanometer TiO2 forms high-strength bond with the shell powder and promotes the catalytic activity of the nanometer TiO2 at the same time. Impregnation can be conducted for a plurality of times to increase load. The nanometer TiO2 is characterized by small particle size, good compatibility with materials, high catalytic efficiency, good stability, good regenerability, and the like, and can be applied to the fields of plastics, rubbers, fibers, coatings, home electronic appliances, paints, ceramics, water and environmental manipulation, pharmaceutical and hygienic articles, etc. In terms of sources of raw materials and production technology, the preparation method not only reduces the production cost of the nanometer TiO2 catalyst but also is helpful for disposal of the increasingly serious environmental problems, thus bearing great environmental protection significance.

The invention relates to a ceramic honeycombed catalyst capable of purifying organic waste gas and a preparation method of the ceramic honeycombed catalyst, belonging to the technical field of purifying industrial waste gas by a catalytic burning method. According to the ceramic honeycombed catalyst, ceramic honeycomb is taken as a framework shape, and one or several oxides of mixtures of aluminum oxide, cerium oxide and cerium-zirconium melt body and the like is/are taken as a coating; and one or two of Pt and Pd is/are taken as an active component(s). The ceramic honeycombed catalyst has the advantages that the utilized air resistance is small, the contact between exhaust air flow and the surface of the coating is prolonged, the conversion rate of the framework is increased by the ceramic honeycomb carrier, the catalyst cost is lowered effectively, meanwhile, meanwhile, the stability of the catalyst is improved, the changing frequency and the using cost of the catalyst are lowered.

The invention relates to foul gas treatment technology and discloses a method and a device for treating foul gas through diphase catalytic oxidation of an activated bamboo charcoal-H2O2. The foul gas passes through a diphase bamboo charcoal catalyst and is adsorbed to remove foul substance molecules; an aqueous hydrogen peroxide solution is adopted to spray the diphase bamboo charcoal catalyst to decompose the adsorbed foul substance molecules so as to achieve cyclic utilization of the diphase bamboo charcoal catalyst; after water-gas separation by a demister, the gas is introduced to an alkali spraying tower; and an alkaline solution is sprayed to neutralize acidic substances of the gas; and the gas is discharged. The method for treating the foul gas has high treating efficiency and is in particular suitable for treating the foul gas with large wind volume.

The invention relates to a semi-wet static gas dedusting and purifying device and belongs to the technical fields of dedusting, waste gas treatment and environmental protection. According to the device, dust in gas flow is electrically charged by adopting corona electrodes parallel to the gas flow direction; the corona electrodes are respectively arranged between disk-type dust collecting poles; disks of the disk-type dust collecting poles are parallel to the gas flow direction and are continuously rotated under the action of a transmission shaft; the lower half parts of the disks are immersed in a water solution, liquid films are continuously produced on the disks along with the rotation; therefore, the capturing efficiency of PM2.5 (Particulate Matter2.5), even the particulate matter with the size below 2.5 is remarkably increased and the semi-wet static gas dedusting device is very suitable for indoor air purification.

The invention provides a rolling brushing type gas dust-removing purification device and belongs to the technical field of dust removal, indoor air management and environment protection. According to the device, two layers of hairbrush rollers which are arrayed in parallel and are overlapped are adopted; the upper and lower layers of the hairbrush rollers rotate in opposite directions; bristles at the lower part of the lower-layer hairbrush roller is immersed into a water tank; bristles of the upper-layer hairbrush roller is wetted by spraying water; dust-containing gas flows through a gap between the bristles of the hairbrush rollers; and dust particles are washed by the bristles to be removed. The device has low gas resistance and a simple structure, and is very suitable for indoor air purification.

The invention discloses emulsifying petrol, diesel and heavy-oil emulsifier, which comprises the following parts: positive decatyl alcohol, positive octyl alcohol, ligroin, positive butyl alcohol, naphthenic acid, oleinic acid, glycerin, sodium dodecylbenzene sulfonate, ammonia and span 80.

The invention discloses a metallic honeycomb catalyst for diesel engine exhaust purification and a preparation method thereof. The technique contains the following features: using the metallic honeycomb as the carrier, mixing titanium dioxide with ammonium metavanadate, cerium nitrate and Cu-Mn complex and the like, adding de-ionized water and stirring uniformly to obtain a suspension, and ball milling the suspension to obtain the slurry, finally soaking the high-temperature pre-treated metallic honeycomb carrier in the slurry, taking-out, drying and baking to obtain the metallic honeycomb catalyst for diesel engine exhaust purification. The invention has the advantages of better heat transfer and lower catalyst bed temperature by employing the lower air-resistance of the metallic honeycomb carrier. The catalytic activity of the catalyst at low temperature is improved while the higher catalytic activity at high temperature thereof is ensured due to adding a certain amount of Cu/Mn complex to the coat, thus greatly widens the working temperature range of the catalyst. Therefore, the catalyst can effectively lower the catalyst cost and improve the catalyst activity.

The invention relates to noise control, and provides a silencing unit. The silencing unit comprises a cavity, a partition plate, and an air passage for communicating two sides of the partition plate; the downstream lateral surface of the partition plate is provided with a spiral structure; by using a planar spiral line as a section contour line, a random section of the spiral structure is adapted with the section contour line, and the integral spiral structure is adapted with the shape formed when the section contour line moves along a locus line; and the spiral structure and the adjacent structure form the spiral silencing cavity and the opening thereof by encircling, and the opening is positioned in the propagation direction of sound wave reflected by the adjacent structure at the downstream side of the partition plate. Through the spiral structure, the reflecting probability is increased, the sound wave is captured, attenuation of the sound wave is increased, the silencing quantity is irrelevant with the expansion ratio, and the silencing and structural properties are better. The invention also provides an internal-combustion engine exhaust silencer. By adopting the silencing unit, good silencing and structural properties are ensured; and meanwhile, the upstream side of a random point on the airflow path is positioned at the inlet side of the silencer of the point, and the downstream side of the point is positioned at the outlet side of the silencer of the point, so the power performance of the air is good.

The invention relates to a microbubble photobioreactor for economic microalga cultivation. The microbubble photobioreactor is characterized by comprising a photobioreactor main body with a preset volume, a controllable particle size microbubble generation device, a flow guiding device and an LED wave frequency double-variable illumination system; the controllable particle size microbubble generation device is arranged at the bottom of the photobioreactor main body to be used for providing a carbon mass transfer and circulation power required for economic microalga cultivation and parsing dissolved oxygen at the same time; the flow guiding device is hung in the photobioreactor main body to be used for promoting liquid circulation and microbubble mass transfer; and the LED wave frequency double-variable illumination system is arranged on the outer side or in the photobioreactor main body to be used for providing an optimal wavelength and a light-dark frequency of growth of microalgae according to the specific economic microalga needs. The microbubble photobioreactor for economic microalga cultivation is simple in structure and convenient to operate and can be widely applied to economic microalga cultivation.

The invention provides a honeycomb catalyst for catalytically incinerating sulfur containing gases and a preparation method. The catalyst is a honeycomb monomer and comprises the following active ingredients by weight percent: 1.0-15% of oxide of vanadium, 0.1-5.0% of silver and 80-99% of titanium dioxide. The preparation method is characterized by dipping vanadium and silver on a honeycomb titanium dioxide carrier. The catalyst has the characteristics of high performance, low cost, simple adaptable process, high removal rates of hydrogen sulfide and carbonyl sulfide and the like, and can be used for incinerating compounds in the gases, such as hydrogen sulfide, carbon disulfide, carbonyl sulfide and the like.

The present invention provides: a pneumatic radial tire for a passenger car, the tire having cross sectional width SW and outer diameter OD satisfying a predetermined relationship formula when the tire is assembled with a rim and inflated at internal pressure of at least 250 kPa; a tire-rim assembly formed by assembling bead portions of said tire with the rim; and a method for using a tire, including preparing a pneumatic radial tire for a passenger car in which cross sectional width SW and outer diameter OD of the tire satisfy a predetermined relationship formula, and using the tire at internal pressure of at least 250 kPa.

The invention discloses polyether amine, a production method thereof, and application of the polyether amine in methanol gasoline. The polyether amine can improve intersolubility, water resistance, air resistance, acid-neutralizing capacity of the methanol gasoline simultaneously and simplify an additive formula and the production process of the methanol gasoline. The polyether amine is prepared by addition of hexylamine and ethylene oxide. Experiments prove that: when the polyether amine is used together with butanol or octanol which accounts for 2 to 3 percent of the total weight, the waterresistance of the methanol gasoline is 1 to 2 percent, and when the polyether amine is used together with No.200 solvent oil or C9 aromatic hydrocarbon which accounts for 7 to 8 percent of the total weight, the saturated vapor pressure is less than 65kPa, and the methanol gasoline has the advantages of acid-neutralizing capacity and obvious improvement of a plurality of indexes. Due to the application of the polyether amine, the invention provides a method for producing the methanol gasoline, which has the advantages of simpleness, convenience, high efficiency and lower cost.