254results about How to "Low air resistance" patented technology

The invention relates to a honeycomb heat accumulator made of silicon carbide-corundum composite materials, which comprises the following main raw materials: 20-30wt% of silicon carbide powder, 4-8wt% of zirconia corundum powder, 20-30wt% of corundum powder, 15-20wt% of porzite powder, 15-30wt% of composition of kyanite, andalusite and sillimanite, 4-8wt% of kaolin and 2-5wt% of cellulose powder. The preparation method of the honeycomb heat accumulator comprises the following steps: adding the main raw materials into a ball mill for ball milling; adding stearic acid of which the weight is not greater than 1% of the total weight of the main raw materials for ball milling, and then, sieving to obtain a mixture; respectively adding tung oil of which the weight is not greater than 1% of the weight of the mixture and glycerol of which the weight is not greater than 1% of the weight of the mixture for mixing, aging and vacuum pugmill to form pug segments; carrying out extrusion forming in a mold, and drying; and insulating at the temperature of 1400-1450 DEG C for 4-8 hours, and then, calcining. The honeycomb heat accumulator of the invention has the characteristics of high fire resistance, good thermal shock resistance, strong corrosion resistance, large heat exchange area, small gas flow resistance, high heat accumulating efficiency, small floor space and long service life which can be more than two years, and is widely used for heat accumulating type heating furnaces of black and non-ferrous smelting, thermal power generation, petrochemical industry, ceramics, glass, machining, civil cookers and the like.

The invention provides a light gas pipeline engineering structure, which can implement pipeline superspeed transportation under normal pressure state, and also can implement higher speed transportation under low vacuum or super low vacuum. The technology not only can remarkably reduce the gas-flow resistance of transporting vehicles in the pipeline so as to improve the running speed, but also can save energy consumption under the same technical condition, reduce project construction and operation management cost, and is easy for constructing because the materials of light gas have rich resources.

The invention discloses a design method of a blade surface drag reduction micro-texture, and belongs to the field of blade drag reduction. According to an impeller blade model, a flow field domain isestablished; numerical simulation is carried out on the flow field domain, a streamline graph of the middle section of a blade in the height direction is obtained, and accordingly a blade pressure surface, a boundary layer separation area and a suction surface backflow area serve as a micro-texture placement area; the micro-texture placement area is closely attached to a blade wing-shaped arrangement micro-texture section, and the micro-texture placement area sweeps on the surface of the blade in the height direction of the blade to form ribs or grooves; finite element simulation is conductedon the blade model with the rib or groove micro-texture to optimize the placement position and the section shape of the micro-texture, the placement position and the section shape of the micro-texturewith the best drag reduction are obtained, and accordingly the blade surface drag reduction micro-texture is constructed. The drag reduction of the optimized blade surface drag reduction micro-texture reaches 5-10%, the energy consumption is reduced, fuel resources are saved, and the design method of the drag reduction micro-texture can be applied and popularized in other fields.

This invention relates to new double-slope wave trickle fillings of a cooling tower, in which two adjacent sets of main cooling wave bands are arranged reversely in stagger with a pitch of waves in between, the distance of the internal binding points is 2-3 times that of the exterior one, a secondary stagnant wave groove is set on the wave band and the cross section is a sine wave, the angle between the stagnant wave groove and the length edge is 15deg, a shunt bank is set between the peak of a main wave band and the valley of the adjacent main wave band to transit smoothly and the highest point of the shunt bank is 4/1-2/1 of the peak.

The invention discloses a flue gas wet desulphurization, dedusting integrated device and process. Original flue gas sequentially enters into an absorbing tower, then passes a pallet layer, a spraying layer, an ultra-fine atomizing and cooling zone and a swirling flow demisting layer to be discharged from an outlet of the absorbing tower. The pallet layer rectifies the flue gas entering into the absorbing tower, then the flue gas ascends in a uniform flow speed on the section of the absorbing tower. SO2 in the flue gas is absorbed and removed. The desulphurized saturated flue gas carrying tiny slurry droplets and dust undergoes atomizing and spraying to be cooled down. The tiny slurry droplets and dust in the flue gas is cooled down in temperature, then condenses and precipitates to a tower slurry pond. The over-saturated flue gas carrying tiny fog droplets continues to ascend to pass through the swirling, liquid knockout, enrichment and removal. The clean flue gas is emitted. The flue gas wet desulphurization, dedusting integrated device and process not only can enhance the removal efficiency of SO2, but also can obviously enhance the dedusting efficiency of the absorbing tower, and achieve the super low emission of the flue gas.

An underfloor cable junction unit for installation in a raised-floor system used as cooling air supply duct for devices arranged on the raised floor and having floor panels with cooling air outlets has a top side. The top side or at least a major part of it is open to enable the passage of cooling air through the top side toward a floor panel with cooling air outlets.

The invention provides an active coke modular bearing device, an absorbing tower and a flue gas purifying method. The active coke modular bearing device comprises a transmission device and multiple active coke modules, each active coke module is provided with a fixing device, and the multiple active coke modules are vertically overlapped seamlessly and then fixed to the transmission device through the fixing devices; each active coke module is of a net-shaped structure, the bottom of each active coke module is narrower than the upper portion by 3-5 cm, the height and width of each active coke module are independently 50-80 cm, and the length of each active coke module is 80-120 cm. The active coke modular bearing device can effectively reduce abrasion loss of active coke and is high in operation efficiency, airflow in the absorbing tower provided with the device is small in resistance and distributed uniformly, the active coke moves smoothly and is high in use ratio, and the removal efficiency of pollutants in flue gas can be remarkably improved.

The invention relates to a packing with raised grain for biologically treating waste gas. The packing is a grille body of which the external outline surface is a spherical surface enclosed by two hemispheres; the binding surface of the two hemispheres forms an equatorial surface; the outer ring of the equatorial surface is an equatorial ring; each of the hemispheres is provided with at least one latitude ring in parallel with the equatorial ring; a plane which is provided with the latitude ring is a latitude plane; blades divergently distributed around the axes of the hemispheres connect adjacent latitude planes or the equatorial plane and the adjacent latitude plane thereof; the edges of the blades are supported between the adjacent latitude planes or the equatorial plane and the adjacent latitude thereof, and the external circle-arc edges thereof form the external outline of the sphere; grille units are formed by the adjacent blades; the blades are provided with a rough surface facilitating the mounting of microorganism; the packing is provided with a through channel along the axes of the two hemispheres; the inner surface of each grille unit opposing to the external outline surface thereof form the outer edge of the channel.

The invention relates to a medium-alkali thick blanking layer sintering and producing method. The sintering materials comprise, by weight, 50-56% of brown iron ore, 5% of oxidized iron sheet, 2-6% of fly ash, 12-14% of return ore of a sintering machine, 11-15% of return ore of a blast furnace, 4-5% of dolomite powder, 4-5% of white ash and 3-5% of coal powder; mixing and pelleting time is 2.5-3.5 min, bedding layer is 100 mm thick, the sintering materials are 900-1000 mm thick, annealing temperature is 1050+/-20 degrees Centigrade, sintering time is 1.5-1.8 min, and sintering negative pressure is 13-15 Kpa; cooling negative pressure is 11-16 Kpa, cold air rate is smaller than or equal to 40%, and temperature of sintered ore after cooling is below 250 degrees Centigrade. By the medium-alkali thick blanking layer sintering and producing method, cost of the sintering materials can be reduced, blanking thickness is increased, permeability of the blanking layer is improved, yield and production of the sintered ore are increased and energy consumption is reduced in sintering.

An insulating (nonconductive) microporous polymeric battery separator comprised of a single layer of enmeshed microfibers and nanofibers is provided. Such a separator accords the ability to attune the porosity and pore size to any desired level through a single nonwoven fabric. Through a proper selection of materials as well as production processes, the resultant battery separator exhibits isotropic strengths, low shrinkage, high wettability levels, and pore sizes related directly to layer thickness. The overall production method is highly efficient and yields a combination of polymeric nanofibers within a polymeric microfiber matrix and/or onto such a substrate through high shear processing that is cost effective as well. The separator, a battery including such a separator, the method of manufacturing such a separator, and the method of utilizing such a separator within a battery device, are all encompassed within this invention.

The invention discloses a method and device for electric agglomeration of outdoor fresh air and indoor air fine particles, and belong to the technical field of electrostatic precipitation. According to the method and device for the electric agglomeration of the outdoor fresh air and indoor air fine particles, an electric agglomeration zone is arranged between a pre-dedusting zone and an efficientdedusting zone to realize the removal of electric agglomeration of fine particles in airflow. The electric agglomeration zone comprises one or more ionizing charging-agglomeration growth sections. Theionization charging-agglomeration growth section is realized by four ways, specifically, wire-plate electrode configuration, wire-plate electrode configuration matched with a current-guiding column,wire-tube electrode configuration and wire-tube electrode configuration matched with the current-guiding column, and a whole assembly is usually formed. The invention has the advantages of simple structure, convenient maintenance and low air flow resistance, and the removal efficiency for the fine particles is improved.

The invention discloses a sub-chamber back blowing bag type dust collector with a reciprocating movement back blowing air port, and relates to a bag type dust collector. The bag type dust collector can solve the problems that a deashing mechanism of the conventional bag type dust collector cannot realize port-to-port deashing chamber by chamber, the deashing effect is poor, the structure is complex, faults are easy to occur and the like. The bag type dust collector is technically characterized in that: a sub-chamber back blowing deashing device is arranged in a gas purifying chamber, one end of a telescopic back blowing gas pipe is connected with a deashing gas source for introducing back blowing deashing gas flow, and the other end of the telescopic back blowing gas pipe is connected with the movable back blowing air port; and a transmission mechanism draws the movable back blowing air port and the telescopic back blowing air pipe to reciprocate and move to the outlet of the small gas purifying chamber sequentially for performing port-to-port positioning back blowing deashing chamber by chamber. The sub-chamber back blowing bag type dust collector is mainly applied in dedusting treatment before smoke gas in power stations, metallurgy, chemical industry, mining, cement, grain processing and other industries is discharged.

The invention discloses a raw material vertical mill external circulation system comprising a material proportioning belt conveyor, an elevator, a feeding conveying mechanism, a feeding three-way joint, a V-shaped powder concentrator, an external circulation roller type vertical mill, a cyclone, a circulation draught fan and a dust remover. The external circulation roller type vertical mill comprises a powder milling barrel on the lower portion and a powder concentration barrel on the upper portion. A mill is arranged in the powder milling barrel. The powder concentrator is arranged in the powder concentration barrel. The powder milling barrel and the powder concentration barrel are separated through a partition plate. An outlet of a powder concentration coarse powder ash hopper of the powder concentrator penetrates through the partition plate and extends into the powder milling barrel. Materials are not conveyed to the powder concentrator in a pneumatic manner to be subjected to separation any more, and due to the adoption of concentrated mechanical conveying of the elevator, the gas flow resistance is greatly reduced, and the electricity consumption is substantially reduced. Thepowder concentrator is still above the vertical mill, the civil engineering cost can be greatly reduced, and the device input can also be greatly saved.

The invention discloses a roll type vertical mill which comprises mill shell. A grinding disc and grinding rolls are arranged in the mill shell. A nozzle ring is arranged between the outer circumference of the grinding disc and the mill shell. An air inlet is further arranged at the position, on the lower portion of the nozzle ring, of the mill shell. Air enters the air inlet to enter the mill shell to form annular airflow. A material blocking ring is arranged on the edge of the grinding disc and is circumferentially and evenly provided with material stirring plates. Louver air guide blades are annularly and evenly distributed in the nozzle ring. Annularly-distributed impact plates are arranged on the upper portions of the louver air guide blades. A discharging opening used for dischargingis further connected to the bottom of the shell. Annularly-distributed vortex plates are arranged on the inner wall of the middle upper portion of the mill shell, tangential air inlets are arranged at the positions of the mill shell, and air is supplied to the tangential air inlets through an air supplementary annular air flue. According to the roll type vertical mill, the air volume of lifting materials on the nozzle ring can be balanced and adjusted, the material grading efficiency of the nozzle ring can be improved, the air volume of the airflow of the lifting materials can be reduced, thepressure difference can be reduced, energy can be saved, and meanwhile the powder selection efficiency can be improved.

The invention discloses electrostatic air filter paper. The electrostatic air filter paper is prepared from polypropylene/polyester composite, chopped glass fiber cotton, modified nano cellulose and waterproof emulsion. The invention also discloses a preparation method of the electrostatic air filter paper. The preparation method comprises the following steps: firstly, beating; secondly, dispersing; thirdly, mixing pulp; fourthly, forming; fifthly, hot pressing; sixthly, impregnating; seventhly, drying. The electrostatic air filter paper obtained by the preparation method disclosed by the invention has the characteristics of higher filtering efficiency, relatively-low filtering resistance and good quality stability.

A heat pump air conditioner includes an intake side heat exchanger including heat transfer pipes passing a refrigerant and being arranged in a direction along an air inlet face, intake heat exchanger configured to cool or warm air and supply the air to a space. A plurality of heat pumps include a plurality of compressors and configured to compress the refrigerant and supply the compressed refrigerant to the heat transfer pipes and a plurality of heat side exchangers and connected to the respective compressors, the heat pumps sharing the air intake side heat exchanger, and a controller configured to switch a state of the compressors and between an operating state and an operation stopped state. The controller controls the compressors and to switch an operation of each of the compressors and between starting and stopping in accordance with a magnitude of an air-conditioning load.

The invention discloses a porous ceramic catalytic oxidizer, a preparation method thereof and a multipurpose efficient air purification device and belongs to the technical field of environments. A columnar ceramic pillar in the porous ceramic catalytic oxidizer takes diatomite as a main material, Fe-Cr-Al alloy wires are taken as support and internal heating wires, cotton and silk are taken as printing templates, a blank is prepared with a compression molding method, the Fe-Cr-Al alloy wires for support are powered on to assist in heating, and calcination in a high-temperature furnace is performed, and the porous ceramic catalytic oxidizer is prepared. The multipurpose efficient air purification device comprises the porous ceramic catalytic oxidizer, a catalytic oxidation electrode, a capturing catalytic oxidation net, a fan and a supply and regeneration device, the porous ceramic pillar of a special structure is supplied with an oxidizer by means of a concentric tube oxidizer supply technology and device, and cooperative treatment of chemical catalytic oxidation and electrocatalytic oxidation of harmful gas is realized in combination with the catalytic oxidation electrode and thecapturing catalytic oxidation net arranged behind the columnar ceramic pillar. The multipurpose efficient air purification device can realize efficient oxidation purification of multiple substances inair and waste gas and has higher economic and environmental benefits.