Abstract: A filter device for adsorption of gaseous constituents from a gas flow includes a filter chamber with filters arranged therein, a clean-gas chamber connected to the first chamber in a fluid-conducting manner via the filters, and a collection chamber arranged beneath the filter chamber, is open toward the filter chamber and has an interior which narrows toward the bottom. An unfiltered-gas duct which leads from the outside, is arranged in the lower area of the collection chamber in such a manner that it can be adjusted in the direction toward the filters. A dust-discharge device, which leads toward the outside, is arranged in the lower area.

Abstract: The present invention relates to a dust filter such as a hose filter which is mainly intended for cleaning primary gas containing dust or the like. The purpose of this invention is to simplify the cleaning process of the filter members and to reduce the design complexity for supplying pressurized gas thereto. To this end, the space above the cleaning gas nozzles is made in the shape of a pressure chamber, which reduces the need for the fittings and control devices.

Abstract: The present invention is a portable filter fan. A highly efficient and inexpensive air filtering device is made from a portable box fan with a pleated sheet o micron particle filter installed externally in channels on the inlet side of the fan housing. Activated charcoal used for removing odors and volatile organic compounds from the air is prevented from egress by a second similar filter mounted externally in channels on the outlet side of the fan housing. A low-cost fan filter sitting at floor level circulates the air and cleans the air more efficiently than many other filters placed in ceiling or attic areas. Gravity pulls the floating particles in the air downward toward the floor, and the new portable air filtering box fan draws and holds the particles on the filter.

Abstract: A method of filtering air includes the steps of providing a filter element, providing a pair of electrodes sandwiching the filter element, applying a DC electrostatic field to the electrodes to produce attracting forces between particulates and micro-organisms contained in the air and the filter element, and intermittently applying a sterilizing electrical field concurrently with the electrostatic field. An RF, DC pulse, or AC power supply can be used to generate the sterilizing electrical field.

Abstract: An apparatus and method for filtration of particulate matter in fluid streams. A unique high efficiency, two element filter embodying an enclosure containing a tandem rotary disk and drum filter mounted on a common shaft is described. A method of operation including manual and computer control modes are described.

Abstract: The invention is a high efficiency particulate (HEPA) filter apparatus and system, and method for assaying particulates. The HEPA filter provides for capture of 99.99% or greater of particulates from a gas stream, with collection of particulates on the surface of the filter media. The invention provides a filter system that can be cleaned and regenerated in situ.

Abstract: An exhaust gas purifier, having three or more filter units parallel, wherein if at least one filter unit fails during its generation, it is compensated by the cyclic operation of the maining filter units so that the total function of the exhaust gas purifier is practically maintained. Electric heaters 14 are provided for regenerating individual filter units 3, and valves 4 are placed either at the entrances or at the exits of the units 3. While filter units 3 with opened valves 4 trap particulates, at least one filter unit 3's valve 4 is closed to send an electric current into the heater 14 for regenerating the filter unit 3. If the detected current is beyond a predetermined range, the current supply is shut off with the valve 4 still kept closed, and another filter unit 3 is regenerated in the same manner.

Abstract: Two filters provided in an exhaust path of an internal combustion engine are used to simultaneously collect particulate in an exhaust gas and are alternately refreshed. When a refresh timing of the filters comes, a determination is made as to which of the filters has a larger accumulation amount. The plurality of filters are refreshed in an order from the filter determined as having the larger accumulation amount, and variation of accumulation amounts of particulate of the filters is corrected, so that both of the filters are refreshed within a tolerable temperature range.

Abstract: An exhaust emissions filtering system for filtering of particulate matter from a flow of exhaust. The exhaust emissions filtering system comprises an ultrasonic transducer unit, an ultraviolet light unit, a magnetic particle filter unit, and an electronic control unit. The exhaust emissions filtering system removes particulates from exhaust emissions by fracturing the particles with the ultrasonic transducer unit, further breaking down the fractured particles with a high-intensity ultraviolet light, and removing the particles with an electrostatic mesh that is located in the magnetic particle filter unit.

Abstract: The present invention is concerned with a process for the filtering out of fibers form an air stream, in which process a stripping blade (3), for the purpose of cleaning, is moved along the surface of a filter (2) installed in a vacuum chamber (10). A controlled linear drive (51) is applied to the said stripper blade (3), by which the stripping blade (3) is made movable for the carrying out of a two phase operational motion along a linear path of travel. The end positions are located at opposite sides outside of the surface of the filter (2) in areas (A, B) wherein the stripping plate (3) is without contact with an opposing surface. During the first phase of travel, the fibrous material is scraped from the surface of the filter (2), while during the second phase of travel of the stripping blade (3) the said fibers are pressed against the filter (2) and the stripping plate (3) essentially moves back over the fiber without taking the said fibrous material with it.

Abstract: A filter frame and media capable of withstanding repeated heating to high temperatures in an oxidizing environment, and a method of cleaning the same for indefinite use in a method of operating industrial paint booths. Progressive density, heat resistant, and preferably metal media paint booth filters are provided for replacement of existing filters in industrial paint booths. The filters are structurally resistant to cyclic heating to high temperature in an oxidizing bake-off oven where the paint residue accumulated on the filters is reduced to ash. After cooling, the ash is removed, and the filters returned to service, and the cycle is repeated. The filter comprises a frame section and a mesh media section which has a plurality of mesh portions. The mesh portions are preferably arranged in a series M.sub.1, M.sub.n-1, M.sub.n, wherein n is a positive integer of 4 or more, that are sized with the free face area A.sub.

Abstract: A self-cleaning filter apparatus for use in removing particulate matter from a transport fluid, such as air, which includes a housing having a pair of spaced pulleys over which an endless filter belt is positioned to present two generally straight filter reaches and two generally curved filter reaches. The endless filter belt includes a permeable substrate formed as an endless belt and a plurality of pleats of filter media extending outwardly from the surface of the substrate so that the transport fluid can pass inwardly therethrough and deposit the particulate material on the exterior surface of the pleats. A suction nozzle and/or an air discharge device is positioned adjacent the outer surface of the endless filter at one of the curved reaches thereof for removing particulate matter deposited on the pleats as they pass along such curved reach.

Abstract: An exhaust gas purifying method, an exhaust gas filter and an exhaust gas filter purifying apparatus reduce the quantity of collected particulates on the outer periphery of the exhaust gas filter and prevent insufficient combustion of particulates during regeneration. The exhaust gas purifying method purifies an exhaust gas by using an exhaust gas filter including a throughhole diaphragm formed into a honey-comb shape in an outer peripheral wall integrally with this outer peripheral wall. A sealing portion is formed on an end portion of a plurality of throughholes partitioned by the throughhole diaphragm, so that the quantity of particulates collected in the throughholes adjacent to the outer peripheral wall and the throughhole diaphragm is reduced as compared with the other portions. The exhaust gas filter has a second sealing portion formed in the throughholes adjacent to the outer peripheral wall and the sealing portion on one end surface of the exhaust gas filter.

Abstract: The invention is directed to a filter device (10) and to a method of cleaning such a filter device for an electrically powered air-moving hair-care appliance, in particular for a hair dryer, a hot-air curling brush or the like, with a filter element (12) having an inner and an outer side (25, 26), in which the inner side (25) of the filter element (12) is arranged in the area of an air entrance opening of the appliance. The filter element (12) is configured as a type of fabric, perforated foil or the like of small thickness, comprising in particular a screening fabric made of a plastic material.

Abstract: The invention relates to a filter installation having at least one filter element for the filtering of a crude gas containing impurities, in particular particulate impurities. The crude gas flow to be filtered can be supplied to the filter installation via a crude gas line and at least two filter modules, each having at least one filter element, are provided. Each filter module is fluidly connected to the crude gas line via a module crude gas line through which a part of the crude gas flow can be supplied to the respective filter module. Each module crude gas line has a blocking member through which the supply of the respective partial crude gas flow can be interrupted for the cleaning of the filter element of the respective filter module.

Abstract: A device for purifying a workstream of contaminants and method of making. One device is made of an inorganic monolithic porous particulate filter and a continuous uninterrupted coating of activated carbon impregnated into the pores of the filter. Preferably the filter has inlet and outlet faces, and a multiplicity of cells separated by porous walls and extending longitudinally and mutually parallel therethrough from inlet to outlet end, a portion of the total number of cells being plugged at the inlet end face, and the remaining portion of the total number of cells being plugged at the outlet end face of the device. Another device can be made entirely of activated carbon having the multicellular structure. A workstream containing contaminants is passed through the device to cause retention of the contaminants. The device can have electrically conducting mechanism for conducting electric current therethrough for removal of the contaminants and regeneration of the device.

Abstract: A rotary drum filter having a reduced amount of fluff in the enclosure during operation. The volume of the enclosure and the mass flow rate of fluff coming into the enclosure are taken into account when determining a proper speed for the rotary drum so that fluff build up on the filter medium is reduced. By properly balancing these three items, fluff may be removed from the filter enclosure at a rate which is equal to or greater than the rate at which the fluff enters the enclosure. The structure of the rotary drum enclosure provides a high velocity, smooth air flow at the bottom of the filter enclosure. The incoming air and fluff are distributed over the entire length of the floor, so that turbulence is created along the length of the floor. In addition, the floor is curved so that there are no joining positions along the floor where dust can accumulate, and so all fluff entering the enclosure is blown to the top of the enclosure.

Abstract: An electrically regenerable diesel particulate filter cartridge and filter comprising an electrically, variably resistive sheet(s) or tube which, when energized, provide sufficient heat to burn off soot particulates entrapped in the filter media.

Abstract: An apparatus for cleaning a generally cylindrical air filter. The apparatus includes a carriage for receiving the air filter in a generally axially vertical orientation. The carriage is selectively turned to orient the filter generally horizontally. Dirt and debris are dislodged selectively from an inside cylindrical surface and an outside cylindrical surface of the filter by a air pressure nozzle and a pneumatic hammer, respectively. A vacuum apparatus collects the dirt and debris that is dislodged from the filter.

Abstract: A self-cleaning filter apparatus for use in removing particulate matter from a transport fluid, such as air, which includes a housing having a pair of spaced pulleys over which an endless filter belt is positioned to present two generally straight filter reaches and two generally curved filter reaches. The endless filter belt includes a permeable substrate formed as an endless belt and a plurality of pleats of filter media extending outwardly from the surface of the substrate so that the transport fluid can pass inwardly therethrough an deposit the particulate material on the exterior surface of the pleats. A suction nozzle is positioned adjacent the outer surface of the endless filter at one of the curved reaches thereof for removing particulate matter deposited on the pleats as they pass along such curved reach.

Abstract: A system and related method for cleaning a particulate filter medium. The filter medium is cleaned by the input of energy to burn off particulate matter collected thereon. The system can comprise a thermocouple for monitoring the temperature of the filter medium at a plurality of locations. There is an electronic control unit for determining the point having a maximum individual temperature and creating a control signal commensurate with the maximum temperature. The control unit can determine if the control signal exceeds a predetermined set point level and if so reduces the energy input. The control unit also determines if the control signal falls within a predetermined range, also referred to as a band width of acceptable values less than the set point level. If the signal falls within the band width, the control unit controls the energy input and varies it as appropriate in order to maintain the control signal within the band width.

Abstract: A method for reducing gaseous emission of halogen compounds in a fluidized bed reactor in which the fine particles entrained in flue gases are used to form a temporary layer of particles on the baghouse filter to absorb halogen gases.

Abstract: A rotary drum filter for multiple lines. The filter includes distinct cells for each production line so that fluff or particulate may be recirculated within its own production line. A balancing fan is included which provides static pressure from selected maximum air flow volume to minimum air flow volume for the filter.

Abstract: A pre-filter for removing lint particles from an air stream entering a filter system wherein an enclosed housing has an air inlet for receiving particle containing air from a remote source and an air outlet in communication with a filter system, a screen covering the air outlet, a vacuum nozzle having a lint inlet adjacent the screen surface, an air conduit having an intake opening communicating with the nozzle, an exhaust fan having an intake opening communicating with the air conduit discharge opening to draw lint containing air from the nozzle through the air conduit, and a drive mechanism for moving the nozzle lint inlet across the screen surface.

Abstract: A device and method for maintaining a clean gas stream includes a particulate filter comprising of support tube made from a formed textile. The formed textile is constructed from a continuous filament inorganic yarn and is porous to allow gas and particulates therein to pass through the support tube. A filtering element is disposed about the support tube to trap particulates in the exhaust gas. The formed textile which defines the support tube is relatively flexible in its natural state. To act as a supporting structure, the formed textile is made less flexible by the application of an inorganic binder. The natural flexibility of the formed textile minimizes the damaging effects of mechanical and thermal shock, while the inorganic binder stiffens the formed textile and allows the support tube to support itself and the filtering element thereon.

Abstract: An apparatus and process is provided for the production of hot mix asphalt (HMA) by the treatment of virgin material alone or adding reclaimed or recycled asphalt pavement (RAP) of up to 100% of the HMA comprised of reclaimed asphaltic pavement (RAP). The HMA is first heated in either a parallel or a counter flow rotating drum which is supplied with hot combustion gases generated by a remote low NO.sub.x burner. The temperature of hot gases entering the drum is from about 400.degree. to 2,000.degree. F., and the temperature of gases exiting from the drum is from about 130.degree. to 220.degree. F. The HMA material optionally can be subjected to microwave radiation to raise the material to a final temperature, or optionally to only reorient the dipolar molecules of the material without any measurable heating of the material. The exhaust gas is treated and made environmentally safe.