Abstract: A method of anti-pollution for exhaust and a device thereof provide a closed housing filled with filter materials and clearances between the filter materials. A discharge part of the exhaust is connected to an inlet hole disposed at an end of the housing and an outlet hole is disposed at another end of the housing for guiding the treated exhaust out. The exhaust is guided into the housing and a plurality of contaminating particles in the exhaust are left in the housing and the pollution resulting from the treated exhaust can be reduced greatly before being guided out from the housing.

Abstract: Disclosed is a device and method for filter particulates contained in exhaust gas exhausted from a combustor in an effective manner. The particulate filtering device includes: a filter part disposed on a predetermined position of an exhaust passage to which particulates produced from a combustor are exhausted and having a predetermined volume in which the particulates are filtered; and a support part with which the filter may be of a predetermined shape.

Abstract: The invention concerns a method for capturing very fine particles generated by a process using a supercritical pressurized fluid and a device therefor. Said method is characterized in that it consists in percolating, in a capture chamber, said fluid loaded with particles through a receptor bed consisting of granules.

Abstract: A filter assembly includes a shaped adsorbent article disposed in a housing. The shaped adsorbent article has one or more projections extending from a surface of the article toward the housing to provide for flow of fluid between the shaped adsorbent article and the housing. The filter assembly may optionally include a diffusion channel for additional filtering and/or one or more porous polymer films disposed over inlet or outlet openings in the housing to reduce or prevent particulate contamination. The filter assembly may be used in a device, such as a computer disk drive, to filter a fluid, such as air, within and/or entering or exiting the device.

Abstract: Provided herein is a granular filtration apparatus for the removal of particulate material from hot gas by contacting said hot gas with granular filtration material. The apparatus being of the type having a filtration chamber containing granular filtration material and having a tapered lower portion comprising at least one inlet tubing for feeding therein hot gases to be filtered and at least one outlet tubing for drawing filtered hot gas. The main feature of the present invention consists in a filtration unit mounted in the filtration chamber above each inlet tubing. The filtration unit comprising a first tubular member mounted above the inlet tubing so as to prevent granular material from entering or blocking said inlet tubing and a second tubular member having a bottom and a top end and being mounted essentially in a co-axial and spaced relationship above the first tubular member.

Abstract: A sorbent filter for use with an air-purifying apparatus. The filter includes a flexible bag and a sorbent material in granular form. The flexible bag defines at least one storage region and is formed of a porous material. The sorbent material is disposed within the storage region. With this configuration, the porosity of the flexible bag is configured to allow passage of air such that the air, including air-borne gaseous molecules or odors, can interact with and be adsorbed by the sorbent material. Conversely, however, the porosity of the flexible bag limits passage of sorbent material granules and dust. As such, the filter generates little if any dust during handling. In one preferred embodiment, the flexible bag is selectively attachable to a separate frame that in turn is designed for mounting within the air-purifying apparatus. With this configuration, the frame can be re-used such that filter replacement requires only a new sorbent filter.

Abstract: A compact plant for the depuration of polluted air, in particular from odorous substances, comprising a unitary housing in which are placed, in sequence, a prescrubbing section, a filtering bed and a postscrubbing section, in the two scrubbing sections the air flowing counter currently with respect to the water sprayed by suitable nozzles and possibly added with suitable chemical additives, whereas the filtering bed, preferably consisting of particles of the kind described in EP-497214, is sprayed with water added with nutrient substances for the micro-organism present in the bed itself, the water being sprayed flowing co-currently with the air passing through the bed.

Abstract: A gas purification apparatus has a housing with an inlet end having an inlet port for gas supply to an interior chamber, and an opposite, outlet end having an outlet port for exit of purified gas from the chamber. The housing is of generally cylindrical shape with a central axis, and the inlet and outlet ports are offset from the central axis towards a lower portion of the housing. A purification medium fills at least the majority of the chamber. The internal wall of the chamber is cylindrical along part of the length of the housing extending from the outlet end, and has a rounded or part-spherical inlet portion extending from the inlet port to the cylindrical part of the internal wall.

Abstract: Filter medium includes at least two kinds of filter media particles. A first plurality of filter media particles includes an extended surface area substrate comprising at least one transition metal impregnant. A second plurality of filter media particles includes an extended surface area substrate comprising a tertiary amine impregnant. In preferred embodiments, at least one and preferably both of the kinds of filter media particles is/are substantially free of chromium, and more preferably contain no detectable chromium. The filtering medium has very broad filtering capabilities. The filtering medium successfully achieves performance levels mandated both by applicable industrial filter approval specifications and by international military filter performance specifications.

Abstract: A filter assembly includes a shaped adsorbent article disposed in a housing. The shaped adsorbent article has one or more projections extending from a surface of the article toward the housing to provide for flow of fluid between the shaped adsorbent article and the housing. The filter assembly may optionally includes a diffusion channel for additional filtering and/or one or more porous polymer films disposed over inlet or outlet openings in the housing to reduce or prevent particulate contamination. The filter assembly may be used in a device, such as a computer disk drive, to filter a fluid, such as air, within and/or entering or exiting the device.

Abstract: A filter assembly includes a shaped adsorbent article disposed in a housing. The shaped adsorbent article has one or more projections extending from a surface of the article toward the housing to provide for flow of fluid between the shaped adsorbent article and the housing. The filter assembly may optionally include a diffiusion channel for additional filtering and/or one or more porous polymer films disposed over inlet or outlet openings in the housing to reduce or prevent particulate contamination. The filter assembly may be used in a device, such as a computer disk drive, to filter a fluid, such as air, within and/or entering or exiting the device.

Abstract: A filter assembly includes a shaped adsorbent article disposed in a housing. The shaped adsorbent article has one or more projections extending from a surface of the article toward the housing to provide for flow of fluid between the shaped adsorbent article and the housing. The filter assembly may optionally include a diffusion channel for additional filtering and/or one or more porous polymer films disposed over inlet or outlet openings in the housing to reduce or prevent particulate contamination. The filter assembly may be used in a device, such as a computer disk drive, to filter a fluid, such as air, within and/or entering or exiting the device.

Abstract: A scrubber for removing pollutants from a fluid and having an inlet for receiving the fluid and an outlet for emitting the fluid, the scrubber comprising a first scrubber coupled with the fluid intermediate the inlet and the outlet for removing a first measure of pollutants from the fluid, a second scrubber coupled with the first scrubber intermediate the inlet and the outlet, the second scrubber for removing a second measure of pollutants from the fluid, and a third scrubber coupled with the second scrubber intermediate the inlet and the outlet, the third scrubber for removing a third measure of pollutants from the fluid.

Abstract: A sorptive article is provided. The sorptive article includes a polyolefin, a wax which is miscible with the polyolefin at the melt temperature of the polyolefin but phase separates on cooling of the article, and sorptive particles distributed in the article. Also provided is a method for removing moisture or other vaporous or liquid material from air or an object in the environment utilizing a novel sorptive article of the invention.

Abstract: An effluent treatment system for removing effluent gases from a gas stream including a packing having a plurality of randomly arranged elements of calcareous material. The elements may be spent shells of shellfish, especially half mussel shells and have a liquid retention portion which may form an individual liquid reservoir depending on the orientation of the element with the packing. Suitable bacteria are retained in at least some of the reservoirs. The system may be operated as a biofilter or a bioscrubber.

Abstract: Constructions and methods are described for collecting particulate material from gas streams. In one specifically described arrangement, a region of depth media is oriented upstream of a second region of depth media. A surface loading media is positioned downstream from the second region of depth media. In an alternate embodiment, a further region of filter media is positioned downstream from the surface loading media.

Abstract: Constructions and methods are described for collecting particulate material from gas streams. In one specifically described arrangement, a region of depth media is oriented upstream of a second region of depth media. A surface loading media is positioned downstream from the second region of depth media. In an alternate embodiment, a further region of filter media is positioned downstream from the surface loading media.

Abstract: Contaminated air, e.g., air contaminated by exhaust gases from automobiles and factories, is purified by passing the contaminated air through a soil layer populated with microorganisms. The contaminated air is humidified before the contaminated air is passed through the soil layer or while the contaminated air is being passed through the soil layer. The soil layer may be warmed, or ozone may be supplied to the contaminated air to oxidize nitrogen monoxide in the contaminated air into nitrogen dioxide before the contaminated air is passed through the soil layer.

Abstract: A device for removing odors and undesirable gases from ambient air comprising an absorbent material enclosed in a tubular shaped container designed to encourage flow of the ambient gases through the container and over and through the absorbent material. In particular, the container includes a plurality of rising channels within the wall of the container, each channel having an opening to the interior space in the vessel, the interior space holding the absorbent material.

Abstract: A filter-purifier that removes particles as well as trace amounts of moisture, oxygen, and other chemical impurities from a gas stream. The filter-purifier includes a removable canister that contains a purifying medium and a pair of sealing poppet valves that automatically close when the canister is removed from an in-line block body. The block body includes gas line fittings with close gland-to-gland separations, since the canister is off to one side and not positioned directly in line between the glands.

Abstract: A device for separating foreign material from air. A main frame includes a chamber having one or more inlet tubes, an air outlet, and a foreign material outlet. An air pump forces the air including the foreign material into the chamber via the inlet tubes. Guides extend between the inlet tubes and the foreign material outlet. The air outlet is positioned between the inlet tubes and the foreign material outlet and causes the air within the guides to change direction exiting the chamber while the foreign material continues to the foreign material outlet. A collector receives the foreign material.

Abstract: A deodorizing filter which is composed of a honeycomb structure of ceramic fibrous paper supporting cuprous oxide or both cuprous oxide and solid acid; and a method for manufacturing the deodorizing filter wherein the ceramic fibrous paper is soaked in the slurry of the mixture of reductant-added water solution with the cuprous oxide and binder or with the cuprous oxide, solid acid and binder and is dried; and then the ceremic fibrous paper is formed into the honeycomb-type filter; or the ceramic fibrous paper with the binder added is formed first into the honeycomb-type filter and then is soaked in the slurry of the mixture of reductant-added water solution with the cuprous oxide and binder or with the cuprous oxide, solid acid and binder and finally is dried to make the deodorizing filter.

Abstract: An exhaust-gas filter, for example a soot-particle filter, has a filter element which has inlet passages for the raw gas and outlet passages for the clean gas. In order as far as possible to prevent clogging of the filter over the running time caused by deposits on the filter walls, the raw-gas passages are configured with a larger cross-section than the clean-gas passages.

Abstract: A regenerable deep bed filter element and method for making it, the element being provided as a closed system, in the case of which a deep bed filter (21), disposed inside at least one hollow-cylindrical chamber (17), is formed by a bulk material filling of regenerable, filtration-active substances of a particulate and/or fibrous structure. The hollow-cylindrical chamber accommodates radial flow by means of porous inner and outer peripheral walls (18, 19). The deep bed filter can be either washed, or regenerated by flushing back with water, steam or chemical cleansing agents, during which the filtration-active substances remain inside the chamber (17).

Abstract: A filter or catalyst body comprising wires or fibers is disclosed which is constructed in a single-layer or multi-layer as woven cloth, braiding or knitted fabric, the wires or fibers being at least partially connected to one another by sintering or welding. The woven cloth, netting, braiding or knitted fabric is endowed with inserted powdery, granular or chip-like particles which are sintered with or welded to the wires or fibers to provide a filter density which is lower in the inlet region of the filter body since fewer particles are provided there.

Abstract: A regenerable deep bed filter element provided as a closed system, in the case of which a deep bed filter (21), disposed inside at least one hollow-cylindrical chamber (17), if formed by a bulk material filling of regenerable, filtration-active substances of a particulate and/or fibrous structure. The hollow-cylindrical chamber can be flowed through radially by means of porous inner and outer peripheral walls (18, 19). The deep bed filter can be regenerated by flushing back with water, steam or chemical cleansing agents, during which the filtration-active substances remain inside the chamber (17).

Abstract: A filter and filtering process for coalescing droplets of atomized oil in a stream of gas includes an oil coalescing layer (14) of e.g. glass microfibres and a second layer (18) of felt or foam downstream of the coalescing layer (14). The drainage layer is impregnated with a fluorocarbon to reduce oil carry-over.

Abstract: The filling of a filter for removing contaminants from air and other fluid is constituted by hanging freely-moving foil strips coated with active carbon and provided with a microorganism culture for biodegradation of the contaminants. Excess culture and detritus from the biodegradation fall out of the filling as the fluid passes downwardly therethrough.

Abstract: A filter arrangement for an airbag gas generator of the type utilizing gas-producing propellant charge to generate gas to inflate an airbag, and having a filter chamber exhibiting contoured interior surfaces. A gas permeable filter material with a large effective filter surface is disposed in the filter chamber in such a manner as to substantially completely fill up the filter chamber and to contact substantially all of its contoured interior surfaces. The filter material comprises a circular knitted wire knit, rolled up and pressed into a shape corresponding to the shape of the filter chamber.

Abstract: An indoor air purifier has a container with a layer of soil supported above a lower air plenum. Room air is drawn downwardly through the layer of soil and discharged from the plenum back into the room. Contaminant gases in the air are adsorbed in the soil and metabolized by microorganisms, producing carbon dioxide and water, and substantially reducing noxious and toxic materials in the air. The soil may be divided into two layers, and the air purifier operated in either of two modes. During normal operation, air is drawn through both layers of soil for removal of particles and destruction of contaminants by microorganisms. Alternatively, air may be drawn through only one layer of soil at a substantially higher flow rate for removing particulate materials. Plants may be grown in the upper portion of the soil to aid in air purification and to provide an attractive room decor.

Abstract: A scrubber which dries and removes contaminants from a fluid stream (a gas-liquid stream) using as a media, particulate material which can be char obtained from a gasifier, the scrubber system processing the gas and cooling liquid combined with the gas which is obtained by reactions in the gasifier. The media is fed in a continuous stream forming a downward moving column in counterflow relationship with the gas. The gas flows upward thru the particulate media and is dried and cleaned as it contacts the media. The flow relationship is such that the cleanest and dryest media and the cleanest gas contact each other. The column of media continues downward entering a liquid scrubbing section where it is disposed below the level of the liquid. There the contaminated liquid stream, passes through the media in counterflow relationship being cleaned as it contacts the media. Both the gas and liquid components of the stream are scrubbed prior to discharge of the spent media.

Abstract: A solar powered passive air filter system for filtering an air space polluted with particulate matter includes an elongated vertical chimney located in association with the polluted air space and in a position to be exposed to solar radiation. A duct connects the polluted air space to the base of the chimney. A filter medium is located in association with the duct for removing air pollutants from an air stream. An air stream is created in the duct by an ascending air stream in the chimney. The ascending air stream in the chimney is maintained in response to exposure of the chimney to solar radiation.

Abstract: Methods and apparatus for removing a pollutant from a fluid stream. A nested array of fibers (1) is provided in a substantially confined region (2). The pollutant-containing fluid stream (4) is passed through a substantial portion of the nested array (1) from an inlet area (7) therein to a fluid-outlet area (8) that is spaced apart substantially from the inlet area (7). A substantial fraction of the pollutant (9) is separated from the fluid stream (4) in a portion of the nested array (1) generally nearer to the inlet area (7) than to the fluid-outlet area (8), and a substantial fraction of the separated pollutant (9) is removed from the nested array (1) at a pollutant-outlet area (12) that is spaced apart from the inlet area (7) and from the fluid-outlet area (8), while the fluid stream (4) may continue to pass through the nested array (1).

Abstract: A gas/solids contacting device provides a light-weight, easily installed unit for contacting gases with particulate solids and permits the removal of spent solids and introduction of replacement solids. A solids contacting chamber is maintained between a pair of generally parallel foraminous surfaces which are inclined at an angle greater than the angle of repose of the particulate solids to be confined in the solids-containing chamber. The devices may be connected in parallel or in series and will function with the gas flowing upwardly or downwardly through a bed of particulate solids within the solids-containing chamber. Gas distributor means are provided to promote uniform low velocity gas flow through the solids bed. Retractable or removable support legs may be included.

Abstract: An apparatus for removing soot from the exhaust gases of an internal combustion engine using a loose material filter. The object is to confine the loose material in a particularly effective manner so as to produce a very high degree of soot separation in the filter. This is achieved essentially in that the (loose material) fixing element is composed of two vertically and coaxially disposed perforated tube members that form a first annular chamber, with those surfaces of the perforated tube members that face the first annular chamber being each provided with a fine-mesh screen and adjacent thereto, a coarse mesh screen. The exhaust gas passes through the filter insert transverse to the gravitational effect of the granulate particles. To compact the granulate fill, the first annular chamber can be charged with compressed air via a second annular chamber that is adjacent thereto and is provided in the upper region of the filter housing.

Abstract: A method for the production of soot filters using felt-like or other bats as filter elements, which are made up of loose refractory fibers. In order to bond the fibers together and to anchor then in place, the filter element made up of the fibers is coated by CVD or precipitation from a solution to give an amorphous coating. The coating is also refractory. It bonds the fibers together at their crossovers.

Abstract: A filtering unit (10) has four filter holders (20) arranged in a rectangle around a blower (36). Each filter holder holds up to two filter elements (11). The blower draws air through the filter elements (11) and outputs filtered air through a vent (40). Refillable filter frames (16) are provided to allow the user to change the filter material (18). In one embodiment, glass chips are used as the filter material (18).

Abstract: This invention relates to products obtained from sugar mill boiler ash, methods of using such products as a filtration material, and/or adsorbent material and methods of manufacturing such products. More specifically, this invention relates to filtration materials, with either a low or relatively high activated carbon content derived from the combustion of sugar cane residues whose characteristics and properties can be preselected and controlled to provide predetermined performance characteristics, and methods of obtaining such products through processing techniques which control the properties of such products. The invention also provides adsorbent materials of very high carbon content useful for applications other than a filter medium.

Abstract: A process for cleaning in particular styrene-polluted spent air by filtering out styrene and an apparatus for performing this process are described. The filter used is a biofilter of tree bark, particularly spruce bark. The filter is in the form of a bed of particles with a particle diameter of 0.5 to 3 cm. The process is particularly inexpensive compared with the relevant prior art cleaning process working with the physical absorption of the styrene on active carbon filters.

Abstract: Organosilicon quaternary ammonias and other microbicidal compounds are bound to the surface of discrete inorganic particles such as glass spheres. Inorganic particles coated with the microbicidal compounds are used in hospital fluidized beds, air filters, and other products in which microbicidal qualities are desired.

Abstract: A multipurpose filtering material particularly for use in electrostatographic reproducing apparatus has a foraminous support matrix having a plurality of interconnecting voids to permit low impedance to the flow of gaseous material but sufficient to trap particulate material entrained in the gaseous material which is coated with a thin dehydrated alkaline film of an alkali metal silicate to neutralize nitrogen oxide species in the gaseous material and has adhesively bound thereto a particulate neutralizer for another noxious gas the surface of which is substantially exposed to the flow of gaseous material. A filter may be placed in electrostatographic reproducing apparatus at the inlet or outlet of an air stream passing therethrough to neutralize nitrogen oxide species and ozone generated by the corona discharge device, and ammonia from the incoming air.

Abstract: The exhaust gas particle filter has a parabola shaped recess in the core ensuring that the inlet flow of the exhaust gases is directed towards the central filter part. The latter has a lower degree of separation relative to the outer filter part--caused by increased filter porosity and smaller mass--so that the exhaust gases flow through the central filter part in the initial phase. Its larger filter porosity and the small mass cause the temperature reduction of the exhaust gas flowing through to remain small so that a downstream supercharger can respond rapidly. Since the separation of soot particles initially occurs primarily in the central filter part, rapid deposition occurs--despite its low degree of separation--so that the resistance during the operation following the acceleration phase becomes similar to that of the surrounding outer filter part. The latter then offers the capacity of separating soot particles over a longer period without regeneration.

Abstract: An absorbent capsule is provided formed from an appropriate, generally cylindrical, plastic material element. The bottom of said element containing the dehydrating product is pierced with at least one slit sufficiently thin so that there is no risk of the dehydrating product contained from escaping therethrough; for this, said bottom may comprise a narrow strip in the form of a dydedron whose apex is inside said element and is slit so as to form said slit.

Abstract: An adsorbent cartridge for mounting on a surface which may be oriented in a downwardly facing attitude, the absorbent cartridge including the substantially rigid self-sustaining first side facing the surface and a second permeable side of flexible sheet material secured to the first side and facing away from the surface, absorbent in the cartridge, a frustoconical central portion formed integrally with the first side and located centrally therein, and a bearing surface secured to the frustoconical portion for receiving the head of a screw which extends through an aperture within the bearing surface and is received in a mounting post on the surface.

Abstract: A flash-back arrestor for dissolved acetylene cylinders wherein a cylinder gas-permeable at both ends thereof is joined to an inner end of a valve body in a dissolved acetylene cylinder in such a manner that said cylinder is communicated with a gas passage in said valve body. Filter plates are provided at upper and lower portions of said cylinder, and a packing consisting of a non-combustible granular material is inserted in the portion of the interior of said cylinder which is between said filter plates.

Abstract: Pollution control apparatus and method are disclosed in which hot exhaust gas containing pollutants including solid particles and hydrocarbon vapors is treated by transmitting such exhaust gas through a container containing wood members, such as wood chips, which serve as a filter media for filtering out such pollutants by causing such solids to deposit and such hydrocarbon vapors to condense upon the surface of the wood members. The contaminated wood chips are discharged from the filter and further processed into chip board or other commercial wood products thereby disposing of the pollutants. Lumber may be used as the wood members of the filter in a lumber kiln by deposition of solid particles on the rough surface of such lumber. The contaminated surfaces of the lumber are removed by a planer which produces smooth finished lumber and contaminated wood chips that may be processed into chip board or other commercial wood products.

Abstract: A dehumidifying container comprises an inner container having an opening at its upper end, and a bottom portion. The inner container is filled with a dehumidifying agent and has a discharge pipe provided upright at the center of its bottom portion. The discharge pipe has at least one slit in a wall thereof and an open lower end which protrudes downwardly through the bottom portion of the inner container. The inner container is detachably fitted into an outer container in such a manner that a space having a predetermined volume is formed between the respective bottom portions of the inner and outer containers. The dehumidifying agent absorbs moisture from the air and the so formed solution of the agent flows readily through the or each slit in the discharge pipe out through the open lower end of the pipe, and into said space. The upper end of the pipe is also open to assist such flow.

Abstract: A method of and apparatus for removing particulate contaminants from a gaseous stream. Broadly, the apparatus comprises a housing containing a substantially vertical granular material retention member having upstream and downstream faces, a substantially vertical microporous gas filter element, said member and element being spaced apart to provide a zone for the passage of granular material therethrough. The housing further comprises a gas inlet means, a gas outlet means and means for moving a body of granular material through said zone. In operation, a gaseous stream containing particulate contaminants passes through the gas inlet means and upstream face of the granular material retention member, passing through said member, said body of granular material, the microporous gas filter element and then out the gas outlet means. The particulates carried in the gaseous stream pass into the granular material and are retained in the body of granular material and upon the upstream face of the gas filter element.

Abstract: Filter elements with changing devices and contamination protection are disclosed. The filter elements are installed in waste tanks and serve to separate substances which are prejudicial to the health when breathed and are used to process air of ventilation systems used in nuclear installations. Two series-arranged standard waste tanks having a coarse material filter layer in one tank and a suspended material filter in another tank are interconnected by a detachable cover constructed for air guidance purposes by means of a lockable, air carrying pipe closable by means of flaps for carrying the supply and spent air which are fixed in a stationary manner to inclined juxtaposed dust laden and clean air ducts with lateral connections. The waste tanks with the incorporated filters can be centrally remotely controlled from one side by lever-transmitted resilient locking systems and can be manually fitted and detached as well.

Abstract: A soot filter arrangement for an exhaust gas flow of an internal combustion engine, especially an air-compressing internal combustion engine. The filter arrangement includes a housing with feed and discharge connections for the exhaust gas stream in a mineral filter material arranged in the housing. The material is provided on a support pipe equipped with passage openings which enable the exhaust gas stream to enter the support pipe in a radial direction and leave the same in an axial direction. Several support pipes are provided at a mutual spacing in a parallel relationship and the filter material includes a thread of spun silicon dioxide fibers wound onto the support pipes.