| 1 |
US 2018/0,021,811 |
Air cleaning machine |
Disclosed is an air cleaning machine, which mainly comprises a hollow tube body, a detect chip, an adsorbent material, a large shell body and two air outlet assembly, the air circulation is formed through a plurality of holes disposed on an underside of the large shell body and a round hole disposed on the side of the large shell body, so the air is able to flow through via an air hole disposed on the one side of the fixing sheet of the hollow tube body. Thus, the detect chip arranged closely to the air hole of the fixing sheet on one side of the hollow tube body can detect the concentration of the suspended particles (PM2.5) in the air. If the concentration of the suspended particles (PM2.5) is too high, a fan of the air outlet assembly would be enabled to make the air flowing via one of the air outlet assembly to the hollow tube body. The suspended particles (PM2.5) in the air. |
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| 2 |
US 2016/0,166,959 |
Air filter for high-efficiency PM2.5 capture |
Described here is an air filter comprising a substrate and a network of polymeric nanofibers deposited on the substrate, wherein the air filter a removal efficiency for PM2.5 of at least 70% when a light transmittance is below 50%. Also described here is an electric air filter comprising a first layer adapted to receive a first electric voltage, wherein the first layer comprises an organic fiber coated with a conductive material. Further described is an air filter for high temperature filtration, comprising a substrate and a network of polymeric nanofibers deposited on the substrate, wherein the air filter has a removal efficiency for PM2.5 of at least 70% at a temperature of a least 70° C. |
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| 3 |
WO 2006/0,092,702 |
Cleaner for air polluted by fine dusts and relative purifying process |
A system for purifying air polluted by fine dusts (PMx) which implements, in an innovative and original way, a new process for laying of fine dusts suspended in polluted air. Its efficacy is limited neither by the concentration of the dusts nor by the characteristic diameter of the type of dusts to be removed. All gaseous emissions, both industrial and civil, in which fine dusts are present, represent possible applications of cleaner of the invention. A typical, although not exclusive, application consists of the treatment of air polluted by urban smog and motor vehicle traffic. Due to the almost total absence of maintenance and control, feature of its innovative purification process, the cleaner of the invention can be designed and sized from time to time, to operate in urban areas where atmospheric pollution is highest, installing it under the road surface or in other eventually available spaces (such as underpasses or in the basements of buildings), or inside kiosks or newsstands, or can even be produced in mobile form. This cleaner is particularly suitable for the laying of atmospheric pollution consisting of fine dusts produced by motor vehicle traffic in stretches of road with high traffic volumes: it can advantageously be installed both inside tunnels and along stretches of road in the open air. |
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| 4 |
US 9,821,271 |
Gas purification agent and method of using the same |
A gas purification agent includes an electronegative film-forming agent and a foaming agent. The electronegative film-forming agent accounts for 20-80 wt % of the gas purification agent, while the foaming agent accounts for 20-80 wt % of the gas purification agent. The gas purification agent of such a composition can be used as a haze removing agent to effectively remove fine dust particles such as PM10 and PM2.5 from the air. The gas purification agent includes 2.5-25 wt % of the electronegative film-forming agent, 2.5-25 wt % of the foaming agent, and 50-95 wt % of a desulfurizing agent. The gas purification agent of such a composition can be used as a desulfurizing agent to remove sulfur-containing compounds from industrial exhaust gases. A method for using the gas purification agent is also provided. |
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| 5 |
US 4,345,916 |
Means and method for removing airborne particulates from an aerosol stream |
Disclosed herein is a method for removing airborne particulates from an aerosol stream by first humidifying said aerosol with steam, and then cooling said aerosol with water to saturation temperature. Thereafter, the saturated aerosol is adiabatically cooled to a supersaturated state and maintained at supersaturation for a time sufficient to permit the growth and removal thereof of said particulates. Further disclosed is an apparatus adapted for practicing the method of the present invention and employing charged droplet scrubbing techniques to remove said particulates. |
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| 6 |
US 6,231,643 |
Membrane electrostatic precipitator |
A membrane is used as a collection substrate in an electrostatic precipitator (ESP). Possible material choices include fibers in the form of woven mats, screens made from stainless steel wires or fiber reinforced polymer composite membranes. The membranes have a tensile bias applied during operation, and have impulse tensile force applied during a dust removal step. By combining a dry ESP membrane field with wet-film cleaning field, it may be possible to improve collection efficiencies both by reducing turbulence and eliminating re-entrainment losses due to rapping. Through implementation of new materials that resist hostile ESP environments, the invention enhances the possibility of using novel technologies, such as pulsed corona and others, suitable for removal of molecules such as NOx and SOx, which is very important for meeting proposed PM2.5 EPA emissions regulations. |
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| 7 |
US 2015/0,245,547 |
Method and use of organic and mineral admixtures for EMI and radioisotope shielding of air filtration media and building materials, for absorption of airborne particulates and for climate change mitigation |
The invention of high efficient multipurpose air filtration media for absorption of greenhouse gases such as CO2 for climate change mitigation (lessening the severity of global warming) and absorption of airborne particulates (PM 0.5 ?-2.5 ?) and the electromagnetic and radioactive isotope shielding of building materials such as wall liners and wall coverings and reflective ceiling insulation using an absorbent organic admixture composed of a polysaccharide such as Hydroxypropylcellulose, a synergistic monosaccharide such as ethoxylated methylglucoside and de-ionized water and mineral additives such as TiO2, Zeolites (Heu & Ca-A(5A)) and boehmites (Curie Formula) is disclosed. |
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| 8 |
US 9,144,764 |
Systems and methods for removing particulate matter from a gas stream
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Horizontal duct scrubbing systems for removing particulate matter from a gas are disclosed. The horizontal scrubbing systems may receive a particulate-containing gas stream (e.g., containing PM10 and/or PM2.5 particulate matter), and remove at least some of such particulates by spraying liquid droplets co-current to the flow of the gas stream, where the liquid droplets have a volume median droplet diameter (DV0.5) of from 240 microns to 600 microns. The scrubbing system may be substantially free of flow deflection members between a liquid inlet manifold and a demister. The system may be remove at least 50 wt. % PM10 and/or PM2.5 particulate matter from the gas stream. |
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| 9 |
US 9,346,060 |
Water ion air purifier |
Provided is an air purification device, wherein a main body comprises air inlets at two sides. An air extractor at an air outlet draws in air; when entering, the air firstly passes through a negative high voltage wire to carry on a negative charge and be sterilized, and then is mixed with nanoscale water mist sprayed out from a spray pipe and enters a dust collection board; the water mist is electrolyzed from water in a water supply tank by an electrolyzer to generate alkaline water, which is supplied to a water storage tank and atomized by an ultrasonic atomizer prior to being ionized into nanoscale water mist by nano-electrodes so as to be sprayed out; and when air flows through a water mist stream, charged contaminative gases are mixed with the water mist, are separated from the air stream under the action of inertia and an attractive force from the electric field of the dust collection board, and collide with droplets to be captured, intercepted and collected, and when PM 2.5 and other dusts in the air are wetted by the droplets to condense into larger particles, gravity settling is realized, with particles with a certain weight falling into a waste water tank to be discharged out, and separated clean air is released out. |
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