Abstract: A gas sampling canister has an electrospray nozzle for creating an ionic fluid electrospray plume. A gas sample is intake positioned to provide a gas sample flowing through the ionic fluid electrospray plume. A cooled counter electrode is positioned to collect the electrospray plume such that selected chemicals in the gas sample are captured by ionic fluid accumulating on the cooled counter electrode. A system and method for sampling gas are also described.

Abstract: A method of separating a coal particle-laden gas mixture into a flue gas recirculation stream and a concentrated sorbent stream includes initiating combustion of a mixture of air and coal in a combustion chamber, extracting a mixture of flue gas and partially-combusted coal particles from the combustion chamber, inducing flow of the mixture of flue gas and partially-combusted coal particles toward a core separator apparatus, and separating the mixture of flue gas and partially-combusted coal particles into the flue gas recirculation stream and the concentrated sorbent stream using a centrifugal action of the core separator apparatus. The recirculation stream and the concentrated sorbent stream flow out of the core separator apparatus on a substantially continuous basis.

Abstract: A liquid stored in the liquid storing means within a housing is supplied to a carrier. A high voltage applied to a discharge end of the carrier and an opposed electrode to emit tiny ionized liquid particles. At leas part of the liquid storing means is detachable to the housing for easy replenishment of the liquid.

Abstract: A carrier is used to carry a liquid, and a high voltage is applied between a discharge end of the carrier and an opposed electrode to emit ionized liquid particles. The carrier has a liquid collecting end opposite to the discharge end to feed the steam of the liquid from a steam generator, condensing the liquid therearound, and feeding the condensed liquid to the discharge end. Accordingly, even when the liquid contains cations such as those of Ca and Mg, the steam of the liquid can extremely reduce the content of these impurities, avoiding the precipitation of the impurities at the discharge end of the carrier to assure stable electrostatic atomization.

Abstract: Charged fine particulate water is provided, which has a nanometer particle size, for example, a particle size of 3 to 100 nm, and contains radicals such as hydroxyl radicals and superoxides. This charged fine particulate water can be generated by applying an electric-field intensity of 700 to 1200 V/mm between a pair of electrodes, while supplying water between the electrodes. By allowing the thus obtained charged fine particulate water to diffuse into an indoor space, it is possible to effectively remove bad odor components/bacteria from the indoor space.

Abstract: Carbon dioxide contained within exhaust gas is combined with bivalent metal ions such as calcium ions or the like in concentrated salt water to form precipitated calcium carbonate and then can be expelled out. Such an environmental friendly design is realized by a bottle upside down device with a bottle neck exit on a bottom, a piston inside the device can be elevated to a top portion to produce a near vacuum air pressure inside the device. All the brine, exhaust gas, and oxygen, ozone draw together into the device can be accelerated to form, at least, precipitated calcium carbonate to reduce carbon dioxide contained within the exhaust gas. Chemical reaction accelerated by a high voltage discharger below the piston, by flashing a portion of water to atomize the brine. Or a heater can heat up the near vacuum device to accelerate chemical reaction.

Abstract: A device and a method for removing undesirable gases and particles from the air are provided. The device includes a purifying chamber through which air (1) to be purified is arranged to pass and has an entrance end provided with a zone (2) producing water dust. The purifying chamber is provided with ionemitting tips (3) operating by high voltage current and with collecting surfaces (4) collecting impurities from the air. The zone (2) is provided with dies (7) producing water dust having a droplet size of 20 to 40 ?m, and the collecting surfaces (4) are grounded. The ion emitting tips (3) are directed toward the collecting surfaces (4) and generate ion jets rushing from the ion emitting tips (3) causing water dust and gases and particulate materials attached to the droplets of said dust to be forced against said collecting surfaces (4).

Abstract: An air particle precipitator and a method of air filtration comprise a housing unit; a first conductor in the housing unit; a second conductor in the housing unit; and a carbon nanotube grown on the second conductor. Preferably, the first conductor is positioned opposite to the second conductor. The air particle precipitator further comprises an electric field source adapted to apply an electric field to the housing unit. Moreover, the carbon nanotube is adapted to ionize gas in the housing unit, wherein the ionized gas charges gas particulates located in the housing unit, and wherein the first conductor is adapted to trap the charged gas particulates. The air particle precipitator may further comprise a metal layer over the carbon nanotube.

Abstract: The device according to the invention includes a drip chamber, which is adapted for connecting to the ordinary water mains, a metal plate and a nozzle that is connected to the drip chamber and disposed above the metal plate and a collecting vessel. The object of the drip chamber is to convert the continuous flow of water from the water mains into discrete drops, thus forming a water reservoir in the bottom of the drip chamber, which is electrically insulated from the water supply while the reservoir still receives a constant new supply of water. Water from the reservoir is passed on to the nozzle and sprayed over the steel plate. An impressed voltage on the nozzle and thereby the water attracts the impurities in the air and these will bind to the water and follow it when the water runs down into a collecting vessel, which is subsequently emptied into the house's drainage system.

Abstract: An air purifier includes a housing having an air inlet, an air outlet and an airflow path therethrough. The housing has a top, a bottom and a plurality of sides. An air filter is located within the housing in the airflow path and a motor is located within the housing. The motor includes a motor shaft and a fan is on the motor shaft for urging air into the air inlet, through the airflow path and out of the air outlet. A cover is removably mounted to the housing proximate the air inlet and a base is removably mounted to the housing. The air purifier is positionable in one of a vertical operating orientation when the weight of the housing is supported by the base and a horizontal operating orientation when the weight of the housing is supported by one of the sides of the housing.

Abstract: An improved system for removing particles and contaminants from an air flow attract particles and contaminants to a plurality of charged spray droplets. The system has a first channel with an inlet and an outlet into which a first air flow is directed, an air flow containing a plurality of contaminants, a solvent reservoir containing a volume of solvent, one or more charged droplet sources for producing a plurality of charged liquid droplets, a second channel with an inlet and an outlet into which a second air flow is directed, one or more voltage reduction electrodes positioned about at least one of said electrospray sources, a grounded counter electrode, and at least one grid positioned between the plane of the charged droplet source and the grounded counter electrode. The voltage between the grid electrode and the charged droplet source is sufficient to sustain an electrospray process.

Abstract: The separation of liquid and/or solid components from a multiphase fluid stream passing through a supersonic fluid separator is enhanced by injecting a surface active agent into the fluid stream passing through the separator. Preferably the spray is injected via an injection tube that has a positive or negative electrical potential, whereas one of the walls of the separator housing has an opposite electrical potential, so that the injected spray and any liquid droplets and/or particles formed around the injected nuclei are induced to flow towards said electrically loaded wall.

Abstract: Process and apparatus for gas cleaning, as in HVAC systems or semiconductor manufacturing clean rooms, for removing 99.999% of particulate and gaseous contaminants, which may be effectively used to remove and neutralize Bio-chem agents introduced by terrorists, having a first stage in which large quantities of positively charged liquid droplets are introduced into the gas to be cleaned so as to remove virtually all negatively charged particulates and at least 90% of neutral particulates and soluble gases; a second stage in which most positively charged droplets from the first stage are removed and remaining particulates are given a positive charge; a third stage in which large quantities of negatively charged liquid droplets are introduced to remove positively charged particulates and more soluble gas contaminants; and a fourth stage in which the negatively charged droplets are removed from the cleaned gas stream.

Abstract: A method for efficiently removing vapor-phase contaminants from gas streams is described. A powdered adsorbent such as activated carbon is ground into a fine powder by wet grinding to form a slurry. Chemicals are added to the slurry to impregnate the sorbent to enhance sorbent effectiveness. The slurry chemical mixture is sprayed into the gas stream in the form of small droplets which evaporate to produce an aerosol of fine adsorbent particles. Vapor-phase contaminants in the gas stream adsorb onto the fine adsorbent particle surfaces and the adsorbent particles are removed from the gas stream by a conventional particle collection method.

Abstract: An apparatus for removing particles from air, including an inlet for receiving a flow of air, a first chamber in flow communication with the inlet, wherein a charged spray of semiconducting fluid droplets having a first polarity is introduced to the air flow so that the particles are electrostatically attracted to and retained by the spray droplets, and an outlet in flow communication with the first chamber, wherein the air flow exits the apparatus substantially free of the particles. The first chamber of the apparatus further includes a collecting surface for attracting the spray droplets, a power supply, and a spray nozzle connected to the power supply for receiving fluid and producing the spray droplets therefrom. The apparatus may also include a second chamber in flow communication with the inlet at a first end and the first chamber at a second end, wherein particles entrained in the air flow are charged with a second polarity opposite the first polarity prior to the air flow entering the first chamber.

Abstract: An air filtration and sterilization system for removing airborne contaminants from air circulated through an air plenum system of a fireplace. Air filtration systems may include particulate, chemical, and ion filtration systems to filter the air. Air sterilization may include ultraviolet, ozone, germicidal coating, and channeled system of ducts systems to sterilize the air. Systems may be used individually or in combination. In addition, optional components, including a warning sensor for indicating when to replace a filter, an automatic initiation sensor for activating and stopping filtration and sterilization, and an air enhancement system for introducing desirable materials into the air, may be provided.

Abstract: A method and apparatus is taught for preheating of glass batch materials by direct contact with glass furnace exhaust gases. Furnace gases 15 flow through a batch hopper 1 in horizontal tunnels formed by open bottom tubes 6, with a free surface of batch forming the bottom portion of the tunnel. The tubes are electrically grounded and a high voltage discharge electrode 18 is located axially in each tunnel. The corona discharge from the electrode acts to retain batch and prevent it's entrainment into the flowing gases. Particulate matter from the gases is simultaneously precipitated onto the batch surface. Acidic gas components such as SO2, HCl, and HF are chemically reacted with batch constituents, thereby removing them from the gas stream. Heat is transferred from the gases to the batch by direct contact. Cooled gases 16 exit the hopper, cleaned of pollutants to levels in compliance with strict environmental regulations.

Abstract: An apparatus for removing particles from air, including an inlet for receiving a flow of air, a first chamber in flow communication with the inlet, wherein a charged spray of semi-conducting fluid droplets having a first polarity is introduced to the air flow so that the particles are electrostatically attracted to and retained by the spray droplets, and an outlet in flow communication with the first chamber, wherein the air flow exits the apparatus substantially free of the particles. The first chamber of the apparatus further includes a collecting surface for attracting the spray droplets, a power supply, and a spray nozzle connected to the power supply for receiving fluid and producing the spray droplets therefrom. The apparatus may also include a second chamber in flow communication with the inlet at a first end and the first chamber at a second end, wherein particles entrained in the air flow are charged with a second polarity opposite the first polarity prior to the air flow entering the first chamber.

Abstract: An apparatus for removing particles from air, including an inlet for receiving a flow of air, a first chamber in flow communication with the inlet, wherein a charged spray of semi-conducting fluid droplets having a first polarity is introduced to the air flow so that the particles are electrostatically attracted to and retained by the spray droplets, and an outlet in flow communication with the first chamber, wherein the air flow exits the apparatus substantially free of the particles. The first chamber of the apparatus further includes a collecting surface for attracting the spray droplets, a power supply, and a spray nozzle connected to the power supply for receiving fluid and producing the spray droplets therefrom. The apparatus may also include a second chamber in flow communication with the inlet at a first end and the first chamber at a second end, wherein particles entrained in the air flow are charged with a second polarity opposite the first polarity prior to the air flow entering the first chamber.

Abstract: A dust collector for collecting dust, in which the rarefaction of a dielectric at the rear part of electric field forming apparatus is prevented, whereby the collecting efficiency can be increased. The dust collector includes a charging device for charging a substance to be collected, such as dust and mist, contained in a gas; a sprayer device for spraying a dielectric on the substance to be collected which is charged by the charging device; an electric field forming device, having first and second electrodes and which form a direct current electric field and dielectrically polarize the dielectric sprayed by the spray device; and a dielectric collecting device for collecting the dielectric which has arrested the substance to be collected. The spray device includes grounding device and for electrically grounding the dielectric before being sprayed to let a charge of the dielectric escape.

Abstract: A gas particle partitioner (GPP) removes particles from an aerosol with high efficiency and with no or minimum changes to the thermodynamic conditions and chemical composition of the gas phase of the aerosol. A permeable grid electrode surrounds a corona wire and separates an interior corona discharge area from an exterior aerosol charging zone. A particle free fluid washes the corona discharge area to minimize any transport of gas components produced by corona discharge to the aerosol. The charged particles in the aerosol are deflected by an electric field in the fractionator to selectively produce a particle free sample stream, which is then separated by a flow splitter from the aerosol.

Abstract: The present invention provides systems and methods for delivering a controlled amount of scent to a target user. Such methods and systems will preferably provide carefully direct boluses or streams of scent(s) to a single or small group of individual(s) using a bolus generator so as to avoid cross-contamination of scents with other persons and other locations. The present invention preferably delivers the bolus of scent as an air ring. The scented air ring moves through the air between the scent generating device directly to the user as a cohesive unit of air. This phenomenon is similar to a “smoke ring” exhaled by a smoker. The scent ring can be directed with accuracy to a localized target as small as the nose of a single user, such that the entire dosage can be delivered to only the user's direct vicinity. Such targeted delivery minimizes the amount of scent that must be delivered to achieve a desired level of scenting at the target location.

Abstract: A dust collector for collecting dust, in which the rarefaction of a dielectric at the rear part of electric field forming apparatus is prevented, whereby the collecting efficiency can be increased. The dust collector includes a charging device (1) for charging a substance (9) to be collected, such as dust and mist, contained in a gas; a sprayer device (2) for spraying a dielectric (10) on the substance (9) to be collected which is charged by the charging device (1); an electric field forming device (3), having first and second electrodes (11) and (12) which form a direct current electric field and dielectrically polarize the dielectric (10) sprayed by the spray device (2); and a dielectric collecting device (16) for collecting the dielectric (10) which has arrested the substance (9) to be collected. The spray device (2) includes grounding device (17) and (18) for electrically grounding the dielectric (10) before being sprayed to let a charge of the dielectric (10) escape.

Abstract: A device for collecting dust using highly charged hyperfine liquid droplets formed through an electro-hydrodynamic atomization process is disclosed. In the dust collecting device of this invention, a high voltage is applied to capillaries, set within a dust guide duct and having nozzles at their tips. An electric field is thus formed between the capillaries and the duct, and allows the nozzles to spray highly charged hyperfine liquid droplets. Such liquid droplets absorb dust laden in air, flowing in the duct by suction force of a fan. An electrostatic dust collector is detachably coupled to the duct while being insulated from the duct, and forms an electric field having polarity opposite to that of the highly charged liquid droplets, thus electrostatically collecting and removing the dust absorbed by the highly charged liquid droplets. The dust collecting device of this invention easily and effectively removes fine dust having a size smaller than 0.1 cm.

Abstract: The present invention provides systems and methods for delivering a controlled amount of scent to a target user. Such methods and systems will preferably provide carefully direct boluses or streams of scent(s) to a single or small group of individual(s) using a bolus generator so as to avoid cross-contamination of scents with other persons and other locations. The present invention preferably delivers the bolus of scent as an air ring. The scented air ring moves through the air between the scent generating device directly to the user as a cohesive unit of air. This phenomenon is similar to a “smoke ring” exhaled by a smoker. The scent ring can be directed with accuracy to a localized target as small as the nose of a single user, such that the entire dosage can be delivered to only the user's direct vicinity. Such targeted delivery minimizes the amount of scent that must be delivered to achieve a desired level of scenting at the target location.

Abstract: This invention relates to a method and a device for agglomerating particles in a gaseous flow through an acoustical agglomeration chamber (3). According to the invention a portion of the flow at the outlet of the chamber is selectively extracted by preferring larger particles, and is re-injected into the inlet of the chamber.

Abstract: Gas scrubbing apparatus and method, employing highly charged liquid droplets for removal of both particulates and pollutant gases from the gas to be cleaned, allowing scrubbing of uncharged particulates by means of monopole--dipole attractive forces between the charged liquid droplets and the electric dipoles induced in the uncharged particulates by the charged droplets; employing electrode geometry at the site of droplet production and charging, having spreading liquid sheet electrodes emitting the droplets from the edges of the liquid sheets, interspersed with electrically conductive induction electrodes, with electrostatic potential of no more than about 20 kv existing between the induction electrode array and the array of liquid sheets, and with spacing such that adequately high electric field strength can be maintained at the edges of the liquid sheets to allow adequate charging of the droplets emitted from the liquid sheets, without the occurrence of corona discharges which could deplete droplet charges

Abstract: An apparatus for sampling a gas stream and concentrating selected constituents found therein. The apparatus includes a collection chamber into which a gas stream is drawn and a nozzle which sprays charged droplets of a collection fluid countercurrent to the gas stream. The charged droplets, now containing the selected constituents, are propelled to the wall under the influence of an electrostatic force and collected in a collection well at the bottom of the collection chamber. The apparatus can include a cyclonic flow inducer which imparts a circumferential component to the gas stream velocity, thereby enhancing collection efficiency by increasing the residency time of the gas stream within the collection chamber.

Abstract: A dust collector efficiently collects dust, especially fine dust (submicron particles). The dust collector, which removes dust and/or mist contained in a gas, includes a charger for charging the dust and/or mist contained in a gas, a sprayer for spraying the charged dust or charged mist or spraying a dielectric material to the charged dust or mist, an electric field former for forming an electric field for subjecting the dielectric material to dielectric polarization, and a collector for collecting the dielectric material which has arrested the charged dust and/or the charged mist.

Abstract: The present invention discloses a process for removing undesired particles from a gas stream including the steps of contacting a composition containing an adhesive with the gas stream; collecting the undesired particles and adhesive on a collection surface to form an aggregate comprising the adhesive and undesired particles on the collection surface; and removing the agglomerate from the collection zone. The composition may then be atomized and injected into the gas stream. The composition may include a liquid that vaporizes in the gas stream. After the liquid vaporizes, adhesive particles are entrained in the gas stream. The process may be applied to electrostatic precipitators and filtration systems to improve undesired particle collection efficiency.

Abstract: Electrostatic spray apparatus including an electrode for generating a high-voltage corona, one or more sprayers for generating a spray of liquid droplets and for directing the droplets into the high-voltage corona whereby an electrical charge is imparted to the droplets. The conduit which supplies the liquid to the sprayers is electrically grounded so that liquid supplied to the sprayer device is at ground potential. The electrode is continuously maintained substantially clean and dry as it generates the high-voltage corona. A process for removing particulates from a gas stream is also disclosed.

Abstract: A method for reducing the sulfur content in combustion gases from burning coal includes the steps of applying opposite electrostic charges to fuel particles and to reaction particles, and mixing the oppositely charged particles prior to combustion to facilitate the formation of sulfur compounds from sulfur in the fuel upon combustion of the fuel, to thereby reduce the sulfur content in the combustion gases. The reaction particles are preferably a carbonate such as CaCO.sub.3 and MgCO.sub.3. The apparatus for implementing the method includes a first pneumatic line for conveying fuel particles, and a first electrostatic charging device for applying an electrostatic charge to the fuel particles conveyed in the line; and a second pneumatic line for conveying carbonate particles, and a second electrostatic charging device for applying an electrostatic charge to the carbonate particles conveyed in the line that is opposite in polarity to the charge applied to the fuel particles.

Abstract: Method to remove organic halogenated molecules from gaseous currents arriving as a residue of industrial working processes or not, the gaseous current being delivered into a reactor (16) containing a fluid bed consisting of at least one solid adsorbent element after having undergone at least one filtration followed by a cooling, the gaseous current cooperating with the solid particles with exchange by adsorption between the gaseous current and the solid particles, the reactor (16) achieving a time of contact between the gaseous current and the solid particles at least longer than 3 seconds, the gaseous current which enters the reactor (16) having a temperature lower than 80.degree. C., but advantageously between 30.degree. and 70.degree. C., the cooling of the gaseous current upstream of the reactor (16) being followed by a gas/water or gas/air heat exchanger (13).

Abstract: The air purification apparatus includes a waterproof chamber having a water supply inlet, a drain, an air inlet, and an air outlet. At least two cylinders are mounted to spin about their respective axes within the chamber in parallel alignment adjacent to each other, and a motor drives each of the cylinders to rotate at high speed. The surfaces of the cylinders have numerous small holes formed therein. A pump circulates water through the water supply inlet to the inside of each of the cylinders. By rotating the cylinders at high speed, the water pumped to the inside of each of the cylinders is injected by centrifugal force through the numerous small holes therein at high speed such that streams of water droplets are forced to collide against each in the typhoon chamber and particularly between the cylinders. These forceful collisions produce infinitesimally small water particles with negative ions that have high air purification ability. An air blower circulates air through the chamber for purification.

Abstract: Apparatus for treating gas or vapor includes an impeller arranged in a conduit which draws dusty or fume-laden air through the duct. One or more nozzles are arranged to spray fine droplets of water onto the impeller. Downstream of the impeller, a set of angled collection plates collect the fine water droplets emitted by the nozzle, together with dust or fumes collected by the droplets. The nozzle is connected to a high voltage source, so that the droplets emitted by the nozzle are electrostatically charged. This causes them to attract dust particles and other contaminants. The collection plates are earthed, so that the charged droplets are attracted to them, improving the effectiveness of the apparatus.

Abstract: An electrostatic gun for electrostatically charging and injecting sorbent particles into a flue gas stream to contact, and electrostatically charge, pollution particles in that flue gas stream. The electrostatic gun is for inclusion as a component of an apparatus for the remediation of pollution particles from a flue gas stream whereafter the clean gas flow is vented to atmosphere. The electrostatic gun receives laminar flow of a selected sorbent material and charges, either positively or negatively, the surface of each sorbent particle in that flow. To provide electrostatic charging to the individual particles, the flow is directed through a straight barrel of a housing of the electrostatic gun to pass alongside a charging wand that is centered axially in the straight barrel. The charging wand is connected to receive a voltage from a high voltage power supply to produce a corona discharge wherethrough the sorbent materials pass to electrostatically charge each sorbent particle.

Abstract: Method for treating gas or vapor includes an impeller arranged in a duct which draws dusty or fume-laden air through the duct. One or more nozzles are arranged to spray fine droplets of water onto the impeller. Downstream of the impeller, a set of angled collection plates collect the fine water droplets emitted by the nozzle, together with dust or fumes collected by the droplets. The nozzle is connected to a high voltage source, so that the droplets emitted by the nozzle are electrostatically charged. This causes them to attract dust particles and other contaminants. The collection plates are earth, so that the charged droplets are attracted to them, improving the effectiveness of the apparatus. A second, auxiliary spray of fine uncharged droplets is directed over an entrance opening of the duct to prevent ignition of explosive gas or particles outside the duct.

Abstract: A flue gas conditioning system uses the waste heat of the flue gas to heat a conditioning agent such as water to add sufficient heat energy to the water to generate steam that can be used to atomize the water into a very fine mist with droplets less than 50 microns injected into the flue gas. The fine mist evaporates quickly conditioning the flue gas to enhance particulate removal by a precipitator or filter. Also, humidification of the flue gas causes trace heavy metals--arsenic, mercury, selium, copper, zinc, etc.--to condense on fly ash particles. Such metals are targeted for removal by the EPA under the blanket description "air toxics.

Abstract: In the purification of gases generated in metallurgical and similar furnace operations, the impurities include solid particles and compounds or elements which are gaseous at the furnace temperatures and only form solid or liquid at temperatures approaching ambient conditions. Proper cleaning therefore requires cooling of the gases to at least the water dew point to cause these impurities to form as particles or droplets. This invention describes an apparatus for collecting such particles or droplets in which a charging device and condensation equipment are combined to provide a simple, yet effective apparatus at a fraction of the cost of conventional apparatus.

Abstract: The steps of the method of the invention are preferably practice on apparatus consisting of components arranged in a closed system for removing particulate matter and gases from a polluted gas stream that includes a sorbent particulate charging and injection gun for electrostatically charging sorbent particles and injecting them into a polluted gas stream to charge and agglomerize pollution particulates therein, the stream flowing into a collection system housing that contains a series of moving and static bed filters and provides for operations at pressures less than atmospheric, and at temperatures up to two thousand (2000) degrees F. The filter beds are maintained across the housing and spaced apart from front to back therein, each filter containing a media material selected for removing the charged agglomerized pollution and sorbent reacted particulates and reacting with gases in the polluted gas stream, providing for removal thereof to clean that gas stream that is then vented to atmosphere.

Abstract: The separation process and apparatus is based on conducting the explosive gas or vapour through a mass transfer column which is charged with an absorbent and filled with an electrically conductive packing. The packing (2) of the mass transfer column (1) must be earthed and have such a dense lattice spacing that no electric charge sufficient for ignition can accumulate at any point in the packing. Under these conditions, a non-conductive electrostatically chargeable liquid may be used as absorption liquid.

Abstract: A method and apparatus for glass manufacture is described having batch preheating and reduced pollution emission. The apparatus includes two modules containing pelletized glass and/or cullet. One module functions as a pelletized glass preheater, and the other as a filter for removing pollution emissions from furnace exhaust gases. The modules are switchable, such that the preheating module can be converted to a filter module, and the filter module converted to a preheating module, thus allowing periodic cleaning and routine maintenance.

Abstract: In the purification of gases generated in metallurgical and similar furnace operations, the impurities include solid particles and compounds or elements which are gaseous at the furnace temperatures and only form solid or liquid at temperatures approaching ambient conditions. Proper cleaning therefore requires cooling of the gases to at least the water dew point to cause these impurities to form as particles or droplets. This invention describes a process and apparatus for collecting such particles or droplets in which a charging device and condensation equipment are combined to provide a simple, yet effective apparatus at a fraction of the cost of conventional apparatus.