Abstract: A dedusting device 1 with a demister 15 advantageously arranged standing obliquely has a very compact construction because sufficient moistening or wetting of dust-containing crude air 24 is possible through the use of intensively acting multiple stream nozzles 33. The ventilator 11 is allocated to its own ventilator housing 18 that is connected to the dedusting device housing 10 and has a muffler 20 inserted downstream.

Abstract: A material for filtering NO2 and nitric acid vapors from air over a wide range of humidities and temperatures including a porous hydrophobic substrate and an amine is provided.

Abstract: The present invention relates to a novel process for the preparation of high-purity chemicals with an extremely low particle count, such as ammonia gas, hydrogen fluoride and hydrogen chloride, which are also used as aqueous solutions in semiconductor technology the corrosive gas is enriched with an absorbent which is miscible with the gas and in which impurities present in the gas are soluble, and the gas is subsequently subjected to membrane filtration.

Abstract: A denuder assembly is adapted for the collection and removal of a gaseous analyte from a sample gas. The denuder includes a housing including an internal cavity, a sample gas inlet fluidly coupled with a sample gas source, a denuder liquid inlet fluidly coupled with a denuder liquid source, a barrier sheet extending across the internal cavity and separating the internal cavity into a liquid reservoir and a gas flow-through channel fluidly coupled with and downstream of the sample gas inlet, and a denuder liquid disposed in the liquid reservoir and permeating the barrier sheet to coat the gas-channel surface of the barrier sheet thereby allowing the denuder liquid on the gas-channel surface to contact the sample gas flowing within the gas flow-through channel and allowing the analyte to diffuse through the barrier sheet into the liquid reservoir.

Abstract: An air purification system which is well-suited to removing particles from outside air as the air flows into a cleanroom used in the fabrication of semiconductor integrated circuits. A housing provides at least one spray nozzle for spraying fine mist water droplets. In use, the water droplets capture the airborne particles in the air flowing through the housing and adhere to the water droplet target. The water droplets coalesce and form larger droplets which adhere to the surface of the water droplet target and ultimately collect in a drain pan. The low-density water droplet target prevents large pressure differentials from forming in the housing, which pressure differentials may otherwise cause re-vaporization of the water droplets from the target and re-flow of the particles in the flowing air.

Abstract: A system for delivering dry compressed gas is provided, the gas being separated from any entrained liquid lubricant and then passed through a moisture absorber column to interact with a moisture-removing fluid. The fluid is a liquid lubricant or is maintained in a separate closed circuit relative to the liquid lubricant. A moisture stripping device receives some of the gas from the absorber column, which is passed in moisture exchange relation with the fluid before the fluid enters the column. The column has a housing defining a vertical absorption zone, and partition plates each defining gas flow holes. The plates have at least one tube passing therethrough, with an open upper end above one plate, and a lower end adjacent the next lower plate. The fluid passes down the tubes and across a top surface of each plate, with the gas flow passing upwardly through the holes in the plates.

Abstract: The subject invention involves an apparatus and method for chilling and scrubbing air to be used in a gas turbine. The apparatus includes at least one spray scrubbing area, where the water is collected, recirculated, and filtered. Cooling is accomplished with at least one evaporative cooling media, such as a packed bed. Optionally the water sprayed into contact with the air may be chilled. At least one drift eliminator is employed prior to the air leaving the apparatus to at least partially dehumidify it prior to use by the gas turbine. The turbine inlet air may be cleaned of solid contaminants, such as sand, dirt, and ash, and of entrained liquid contaminants such as seawater. Under high ambient temperature and relative humidity conditions, this system will also recover fresh water from the air by condensation. The power available from gas turbine refrigeration compressor drivers may be increased by this direct contact cooling of the turbine inlet air.

Abstract: A high purity stream of methane can be obtained from crude natural gas, especially exhaust gas from waste landfills, by a process that includes first removing moisture, then feeding the dried crude gas mixture to a gas-liquid contact absorber to strip heavy hydrocarbon compounds in a primarily carbon dioxide by product stream. Methane enriched gas from the absorber is separated in a membrane separation unit which provides permeate enriched in carbon dioxide that is recycled to the absorber and a purified product stream of methane.

Abstract: The present invention relates to a novel process for the preparation of high-purity chemicals with an extremely low particle count, such as ammonia gas, hydrogen fluoride and hydrogen chloride, which are also used as aqueous solutions in semiconductor technology the corrosive gas is enriched with an absorbent which is miscible with the gas and in which impurities present in the gas are soluble, and the gas is subsequently subjected to membrane filtration.

Abstract: A method for removing dissolved solids, particularly salts, from water. An apparatus for performing the inventive method is disclosed. The aqueous solution to be treated, for example sea water, is atomized using special non-pneumatic nozzles, and sprayed into an evaporation chamber through which air, heated by waste heat, is blown. The micro-droplets undergo rapid evaporation in the chamber, resulting in the separation of the salt solids from the vapor phase of the water. The mixture of suspended solids and water vapor is filtered to remove and collect the salts, and the water vapor is condensed to collect the salt-free water.

Abstract: A gas contaminant is filtered using fibers having internal cavities containing a chemically reactive oxidizing agent, an acid or base, a coordinating agent, a complexing agent, or a deliquescing agent. Where the contaminant is basic, the reagent is preferably an oxidizing agent. Where the contaminant is acidic, the reagent is preferably basic, and more preferably comprises a group 1 or group 2 metal cation. The reagent may also advantageously comprise a phosphate, chitosan, hypochlorite, borate, carbonate, hydroxide, or oxide. Where the contaminant is neutral, the reagent is preferably an oxidizing agent, complexing agent, coordinating agent, or deliquescing agent. The reagent is preferably impregnated into an adsorptive solid, including, for example, carbon powder, zeolite, aluminum oxide, or silica. The fibers are preferably multilobal, and most preferably either trilobal or quadrilobal. It is also preferred that the fibers contain a plurality of T shaped lobes.

Abstract: A method for removing impurity substances in air flowing in a flow passage includes filtering the air in a first filter for removing solid substances; cooling the air in a first cooler to not higher than its dew-point temperature; capturing gaseous substances in the air in a wet-type impurity removing apparatus; cooling the air in a second cooler; and filtering in a second filter. The wet-type impurity removing apparatus includes a first liquid atomizer having two pluralities of nozzle ports for spraying, arranged mutually spaced apart and facing each other in the direction of the air flow passage; first and second condensing and capturing assemblies located across the first atomizer and spaced apart from each other, with the first assembly being upstream and the second assembly being downstream from the first atomizer; a second atomizer for capturing any remaining gaseous substances in the air; and a third condensing and capturing assembly.

Abstract: The invention concerns a device for filtering gas comprising a microporous or microfibrous adsorbent filter (6) and means for forcing an air flow between an exhaust hood (2) and outlet duct (3) for the filtered air. The invention is characterized in that it comprises liquid spraying means (18) and centrifuging means arranged between the spray means and the filtered gas outlet. The particles wetted by the sprayer are blocked by the internal rotary filter and discharged with the carrier liquid towards an external container (10).

Abstract: An ultra-efficient multilobal cross-sectioned fiber filter for chemical contaminant filtering applications is described. An absorptive chemically reactive reagent, preferably an acid or base and in liquid or an adsorptive chemically reactive reagent (an acid or base) in solid form, is disposed within longitudinal slots in each length of fiber. The reagent may be used alone or in conjunction with solid adsorptive particles which may also be utilized with the reagents in the longitudinal slots within the fibers. Reagents within the fibers remain exposed to a base-contaminated airstream passing through the filter. Base contaminants in the airstream, chemicals such as ammonium and amines (as well as particles), react with the acid reagent within the longitudinal slots of the fibers. As the contaminant and reagent react, the ammonium or amine becomes irreversibly absorbed (or adsorbed if reagent is a solid acid) to the liquid acid reagent and multilobal fiber.

Abstract: An air cleaning apparatus is disclosed which, in one embodiment, has: an inlet for ambient air; an outlet for purified air; a mechanism for the uptake of a scrubbing liquor and for the removal of impurities dissolved or dispersed in the ambient air by contact with said scrubbing liquor; an inlet for feeding a scrubbing liquor from a scrubbing liquor feeding tank; an outlet for discharging used scrubbing liquor; and a blower for drawing ambient air into the apparatus, flowing the air through the apparatus and discharging the purified air from the apparatus.

Abstract: A weld chamber has an air intake and an exhaust or evacuating ductwork for evacuating gases and other particles from the welding chamber. The evacuating ductwork is connected to a vacuum source to remove gases and by products from the weld chamber during welding. A throttle plate is provided in the evacuating ductwork adjacent the weld chamber to adjust or regulate the air velocity evacuating from the weld chamber. The evacuating duct then leads to a sealed water filtering tank. All of the exhausted/evacuated gases and by products are led beneath the water line and bubble through the water before emerging from the sealed water. The soot and iron particles are immediately cooled and trapped in the water tank. Moreover, particles become wet and are less likely to become airborne thus leading to a substantial portion of the particles being trapped in the sealed water tank. Thee remaining gases are then evacuated to the vacuum source and further filtered by a mechanical filtration device.

Abstract: The invention is a humidification and filtration mask having an open cell foam reservoir attached to the facial or inner surface of a paper filtration mask. The reservoir provides for evenly wetting the paper mask by capillary action, after being charged with water. The device offers low inspiratory airway resistance compared to other art and is lighter and less costly.

Abstract: Apparatus for removing impurity substances in the air, comprising a first filter (17) for removing solid substances in the air flowing in a flow passage (13) defined by a housing (11); first cooling means (18) for cooling the air to not higher than its dew-point temperature; a wet-type impurity removing mechanism (19) for capturing gaseous substances in the air; second cooling means (20); and a second filter (22).

Abstract: A Method for purifying gas loaded with dust particles of various sizes, which method includes the following steps: (a) the gas loaded with dust particles is subjected to wet gas scrubbing at or above the dew point, during which operation any acid gaseous components present in the gas are absorbed and the major proportion of coarse dust particles having a size of ≧50 &mgr;m is removed by a scrubbing liquid, after which (b) the remaining dust particles present in the gas are collected at or above the dew point in an installation for removing dust from gas, purified gas being obtained.

Abstract: The subject invention involves an apparatus and method for chilling and scrubbing air to be used in a gas turbine. The apparatus includes at least one spray scrubbing area, where the water is collected, recirculated, and filtered. Cooling is accomplished with at least one evaporative cooling media, such as a packed bed. Optionally the water sprayed into contact with the air may be chilled. At least one drift eliminator is employed prior to the air leaving the apparatus to at least partially dehumidify it prior to use by the gas turbine. The turbine inlet air may be cleaned of solid contaminants, such as sand, dirt, and ash, and of entrained liquid contaminants such as seawater. Under high ambient temperature and relative humidity conditions, this system will also recover fresh water from the air by condensation. The power available from gas turbine refrigeration compressor drivers may be increased by this direct contact cooling of the turbine inlet air.

Abstract: For purifying dust-containing air, particularly in underground mining and tunnel construction, a dust separator 1 in the form of a rotary washer 1 is proposed. The drive 5 of said rotary washer 1 is equipped with a gear unit 10 in order to enable long-term operation with a straight characteristic. Furthermore, disposed downstream of the fan impeller 6 is a special separating element 11 in the form of a demister 20, which is disposed so as to be suspended approximately horizontally in the air stream. Clogging of the demister 20 is therefore effectively prevented and so uniform and reliable operation is guaranteed. The demister 20 together with its associated jetwashing device 22 may be swivelled by a positioning motor 23 into an, in each case, optimum position.

Abstract: A humidifier/air purifier including a housing defining a water reservoir, an air inlet opening and an air outlet opening; a generally V-shaped wicking element in fluid communication with the reservoir; an air filter with a generally V-shaped air filter medium and a frame supporting the air filter medium mounted above the wicking element; and a blower for causing air flow through the air inlet opening, through the wicking element, through the air filter, and through the air outlet opening.

Abstract: Method for purifying gas loaded with dust particles of various sizes, which method comprises the following steps:

Abstract: A method and apparatus is provided which continuously filters scrubbed gases prior to emission to the atmosphere. In particular, the method and apparatus can continuously scrub the effluent stream from a chemical vapor deposition process, such as the process used to deposit epitaxial silicon. In order to provide this continuous scrubbing, a separation housing having a filter housing is provided that permits the filter to be replaced during and without interruption of the scrubbing and filtering process. The filter housing can define a pair of tracks that guide the insertion and removal of a filter such that inserting a clean filter into one end of the pair of tracks causes a spent filter to be pushed out of the opposed end of the tracks as the clean filter is slid down the tracks.

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 spray dryer/bag filter apparatus for removing flue gas from an incinerator, which is structurized to re-circulate the purified gas as the shield air for protecting the slurry spraying nozzle thermally from hot gas without using any additional blower to introduce external air, that the flue gas is not diluted.

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: 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: Recovery of ethanol from the exhaust stacks of a bread-baking oven is achieved by passing the stack emissions through an adiabatic humidifier where the emissions are humidified to near saturation. The unevaporated water content of the humidifier is collected for separation of the ethanol content. The humidified emissions are passed from the humidifier to the vaporization chamber of a heat exchanger where the gas content of the humidified emissions is separated from the moisture content thereof, and the moisture content is collected for recovery of the ethanol content.

Abstract: An apparatus for extracting condensable materials from exhaust gases which are produced by combustion. In a steam injected gas turbine driven powerplant, water is extracted from the exhaust gasses and returned to the cycle for steam raising and injection into the combustor. Exhaust gases pass flow co-currently with a cold water fog, water vapor in the fog condenses on the fog drops, the flow passes through a de-mister coalescing the drops so as to produce a warm rain of condensate, the condensate is cooled with a heat exchanger using a cooling medium such as seawater, and the cooled condensate is returned to the cycle.

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: The waste gas processing apparatus and method thereof for semiconductor device fabricating equipment includes a water spraying chamber, and an exhaust tube. A demister and an external gas introducer, for causing external gas to enter the exhaust tube adjacent the demister, are installed in the exhaust tube.

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: A method of removing particulates from a gas stream involves introducing the gas stream in a turbulent flow condition into and through a flow passage situated over spaced surfaces defining a plurality of stagnant, turbulent-free regions of gas in which there is no net gas flow and which communicate with said gas stream and arranging the stagnant regions near the flow passage so that turbulent eddies of said gas stream carrying suspended particulates penetrate spaces between the surfaces and then decay in said stagnant regions defined therebetween where said particulates are trapped and deposited mechanically on said surfaces within each of said regions. The deposits accumulate at bottoms of the regions and can be periodically removed.

Abstract: An indoor air filter is provided. The indoor air filter has a housing including a water tank, an air pump, an air inlet, an air outlet, an air pump positioned between the air inlet and outlet, and an air circulation section between the air inlet and the air pump. The air circulation section is defined a pair of partitions enclosing first and second turbulent boards which enclose a foam filter and an active carbon layer. The housing also has a filter screen positioned between the air circulation section in the air inlet and a conduit for spreading water from the water pump into the inlet air for subsequent filtering by the filter screen and the air circulation section.

Abstract: Sulfuric acid fumes generated in a manufacturing process are captured at the point of generation and transported at a flow rate of 3500 feet per minute to a filtration unit having a primary two-stage separator and a final three-stage separator. The primary separator is filled with spherical packing material, preferably of polypropylene, and the final separator consists of a composite pad of high efficiency filamentary packing material, preferably of polypropylene with increasingly smaller voids. Sulfuric acid is recovered from both separators for reuse and purified air is exhausted from the system. The removal efficiency exceeds 99%.

Abstract: The present invention relates to a process for removing harmful hydrocarbons, particularly plant protective aerosols and vapors, from the fresh air supplied to a vehicle cabin. The loaded fresh air is subjected to a partial condensation with subsequent phase separation. The fresh air is cooled below the dew point of the components to be removed in a type of cold trap. It has a device for collecting and draining the obtained condensate. A standard cooling plant may be installed for providing the cold necessary for partial condensation. If the vehicle is already equipped with an air conditioning system, then the cooling necessary for partial condensation is tapped directly from the air conditioner cycle. It is possible for the fresh air stream to be passed over the evaporator of the air conditioner. The cold air stream present following the removal of the condensate can be warmed in heat exchange with fresh air which is to be cooled prior to its further release into the vehicle cabin.

Abstract: Sulfur dioxide in flue gas exhaust stream from fossil fueled boiler, is absorbed by a regenerative organic solvent in a centrifugal gas separator-absorber.

Abstract: Disclosed is a process for removing emissions originated in the manufacturing industry, especially from polymerization operations and thermoplastic polymer processing operations by collecting air containing the emissions, directing the air containing the emissions to a candle filter in a candle filter housing and rinsing the air containing the emissions within the candle filter with a solvent.

Abstract: Disclosed is a process for removing emissions from caprolactam polymerization operations and thermoplastic polycaprolactam processing operations by collecting air containing the emissions, directing the air, containing the emissions, to a candle filter in a candle filter housing and rinsing the air, containing the emissions, within the candle filter with an aqueous caprolactam solution, containing at least 4% by weight caprolactam.