BHA Group, INC. Patent applications |
Patent application number | Title | Published |
20130180224 | DROPLET SHAPED FILTER FOR BAGHOUSE - A filter element includes a filter media extending along a longitudinal axis and extending circumferentially about a central passageway that extends along the longitudinal axis. The filter media defines a droplet cross-sectional shape perpendicular to the longitudinal axis. Alternatively, the filter media defines a top portion shape and a bottom portion shape, with the top and bottom cross-sectional portion shapes being asymmetric with respect to each other. The filter element may be used in a filtration arrangement for filtering dust flow. The filtration arrangement also includes a filter housing that has an opening through which dust flow is configured to enter the filter housing. | 07-18-2013 |
20130104929 | PORTABLE BOILER/SCR ONLINE PINPOINT PULSE DETONATION CLEANING DEVICE | 05-02-2013 |
20130068689 | MEMBRANE DISTILLATION MODULES USING OLEOPHOBICALLY AND ANTIMICROBIALLY TREATED MICROPOROUS MEMBRANES - The present invention provides a system for liquid distillation which includes a vapor permeable-liquid impermeable microporous membrane having structures defining a plurality of pores, an oleophobic material that is applied to the structures of the membrane so as to leave the plurality of pores open, a means for supplying non-distilled liquid to the first side of the membrane, and a means for collecting distilled liquid from a second side of the membrane. In a further example, the present invention provides a method for the distillation of liquids. | 03-21-2013 |
20130056034 | SELF DRIVEN ROTATING PULSE DETONATION CLEANING SYSTEM - A pulse detonation device can provide one or more shock waves to an operating device. The pulse detonation device includes a pulse detonation chamber providing one or more shock waves, at least one pulse detonation outlet extending into the operating device and in operative association with the pulse detonation chamber, and a rotary union. The rotary union rotatably attaches the pulse detonation chamber to the at least one pulse detonation outlet, wherein the at least one pulse detonation outlet can move with respect to the pulse detonation chamber. The at least one pulse detonation outlet is rotatable within the operating device and can deliver the one or more shock waves to a plurality of locations within the operating device. | 03-07-2013 |
20120279128 | PULSE DETONATION COAL GASIFICATION SYSTEM - A pulse detonation device is provided for delivering a shock wave into a gasification device to promote a localized coal gasification reaction in the gasification device. The pulse detonation device includes a fuel inlet for receiving fuel, an air inlet for receiving air, a pulse detonation chamber wherein the fuel and air are configured to mix, and an ignition device for igniting the mixture of fuel and air. The ignition of the mixture of fuel and air creates a shock wave in the pulse detonation chamber. Further, the pulse detonation chamber is attached to a gasification chamber and is configured to extend into a coal feed tube that extends into the gasification chamber, with the shock wave configured to exit the pulse detonation chamber and interact with coal in the coal feed tube. | 11-08-2012 |
20120066890 | PROCESS FOR TREATMENT OF POROUS SUBSRATES - A process and an associated assembly for supporting a porous media during a treatment which exposes the media to a fluid that modifies at least one property of the media. The assembly includes a supporting core. The media is wrapped in a plurality of layers about the core to form a first roll of the media. The assembly includes first securement mechanisms exerting diametrical pressure on the ends of the first roll to prevent fluid flow axially out of the ends of the first roll. An additional amount of the media is being wrapped in a plurality of layers about the first roll to form a second roll of the media. The assembly includes second securement mechanisms exerting diametrical pressure on the ends of the second roll to prevent fluid flow axially out of the ends of the second roll. The assembly may be part of equipment. | 03-22-2012 |
20120061923 | BREATHABLE GASKET - An article, specifically a sealing gasket, includes at least one layer of microporous expanded polytetrafluoroethylene (ePTFE) and at least one air permeable layer. The sealing gasket simultaneously provides for the passage of air through the gasket while limiting the passage of liquid through the gasket. The sealing gasket may be used between two components that require air flow between the components while limiting the passage of liquid between the components. In one aspect, the air permeability is at least 0.01 cubic feet per minute (CFM) per square foot as determined by ASTM D 737 testing. | 03-15-2012 |
20110296989 | CONTROL OF GROUNDED SURFACE GEOMETRY IN ELECTROSTATICALLY ENHANCED FABRIC FILTERS - An electrostatic filter assembly configured to be installed in equipment for removing particulate matter entrained within a gas stream. The filter assembly functions in the removal and collection of the particulate matter from the gas stream. The equipment for removing particulate matter includes a high voltage discharge electrode for imparting an electric charge to the particulate matter whereby an electrical field is produced at the filter assembly. The filter assembly includes a filter element and a supporting structure for the filter element. The supporting structure is configured to establish at the filter assembly, under the operating conditions of the equipment for removing particulate matter, an electrical field having an intensity that produces no more than a selected amount of degradation at the filter element during operation of the equipment for removing particulate matter. Also a method of manufacturing such an electrostatic filter assembly. | 12-08-2011 |
20110252757 | HELICAL STRAPPING METHOD FOR HIGH TEMP PLEATED FILTERS - A filter cartridge that includes a filter media. The media is pleated and the pleats are arranged into a tube about an axis with a first pleat proximate a last pleat. The filter cartridge includes a strap that has first and second end portions and that extends at least one revolution around the pleated media tube in a helix such that the first and second end portions of the strap are axially displaced from each other. The first and last pleats of the media are attached to each other and the first and second end portions of the strap are attached to the media. The filter cartridge may be made by an associated method. In one specific example, a stitching attaches the strap to the media. | 10-20-2011 |
20110209612 | UTILIZATION OF POWDERED SORBENT FOR MERCURY CONTROL FROM COAL-FIRED POWER PLANTS - A system and an associated method for improving mercury removal from a flow containing combustion exhaust. The system includes a filtration arrangement that includes at least one layer of ePTFE, with the at least one ePTFE layer being configured to have a geometry that retains at least some accumulated particulate matter. The system includes an arrangement for providing at least some particulate matter in the flow for accumulation on the filtration arrangement by the geometry. | 09-01-2011 |
20110209609 | ENHANCED MERCURY CAPTURE FROM COAL-FIRED POWER PLANTS IN THE FILTRATION BAGHOUSE USING FLUE GAS TEMPERATURE AS PROCESS CONTROL KNOB - A system and associated method for improved mercury removal from a flow containing combustion exhaust. The system includes a filtration arrangement through which the flow proceeds to remove material, including mercury, from the flow. The system includes a sensor arrangement sensing a mercury concentration within the flow downstream of the filtration arrangement and providing a signal indicative of the sensed mercury concentration. The system includes an adjustable temperature control arrangement changing a temperature of the combustion exhaust proceeding to the filtration arrangement in response to the signal indicative of the sensed mercury concentration to change an amount of mercury being removed from the flow. | 09-01-2011 |
20110192125 | PLEATABLE PTFE FILTER MEDIA WITH EPTFE MEMBRANE - A filter media including a scrim, a polytetrafluoroethylene (PTFE) media substrate upon the scrim, and a layer of expanded polytetrafluoroethylene (ePTFE) membrane adhered to the PTFE media substrate on the scrim. The filter media is pleatable and has air permeability of approximately 3-10 cubic feet/min at a 0.5 inch H2O pressure drop and an original filtration efficiency greater than 99.0% when tested in an unused, unpleated condition with a 0.3 micron challenge aerosol at a flow rate of 10.5 feet/min and when tested after a cleanable dust performance test according to ASTM D6830. | 08-11-2011 |
20110139008 | PTFE PLEATED FILTER ELEMENT - A filter media including a scrim, a polytetrafluoroethylene (PTFE) media substrate upon the scrim, and a layer of expanded polytetrafluoroethylene (ePTFE) membrane adhered to the PTFE media substrate on the scrim. The filter media is pleatable and has air permeability of approximately 3-10 cubic feet/min at a 0.5 inch H2O pressure drop and an original filtration efficiency greater than 99.0% when tested in an unused, unpleated condition with a 0.3 micron challenge aerosol at a flow rate of 10.5 feet/min and when tested after a cleanable dust performance test according to ASTM D6830. | 06-16-2011 |
20110097571 | OLEOPHOBIC, AIR PERMEABLE, AND BREATHABLE COMPOSITE MEMBRANE - A porous composite membrane is provided by an associated method and includes a first microporous substrate of a first material. A second, coating material is joined to the first microporous substrate to form a bi-component arrangement with the first microporous substrate. The second material is different than the first material. A third, coating material is applied to the bi-component arrangement. The third material is different than the first and second materials. The third material extending over at least a portion of surfaces of the bi-component arrangement which define the micropores. | 04-28-2011 |
20110061528 | POWER PLANT EMISSIONS CONTROL USING INTEGRATED ORGANIC RANKINE CYCLE - A method of reducing the concentration of pollutants in a combustion flue gas having a first temperature is provided. The method includes the step of providing an organic Rankine cycle apparatus utilizing a working fluid and including at least one heat exchanger is arranged in thermal communication with the flue gas. The method further includes the step of reducing the temperature of the flue gas to a second temperature less than the first temperature by vaporizing the working fluid within the heat exchanger utilizing thermal energy derived from the flue gas. The method further includes the step of filtering the flue gas through at least one filter disposed downstream of the heat exchanger to remove pollutants from the flue gas. An associated system configured to reduce the concentration of pollutants in the combustion flue gas is also provided. | 03-17-2011 |
20110048002 | TURBINE EXHAUST RECIRCULATION - An exhaust gas recirculation (EGR) system and a method for recirculating an exhaust gas stream from an outlet to an inlet of a turbomachine are provided. The EGR system includes a guide element to channel the exhaust gas stream from the inlet to the outlet and a Rankine cycle system through which a working fluid is circulated. The Rankine cycle system including serially a high temperature heat exchanger in heat exchange relationship with the guide element; an expansion device coupled to a generator; a low temperature heat exchanger in heat exchange relationship with a cooling medium; and a pump. The exhaust stream at the outlet has a first temperature and the exhaust stream downstream of the high temperature heat exchanger has a second temperature that is lower than the first temperature. | 03-03-2011 |
20100275776 | CLEANING PRESSURE REDUCTION THROUGH BLOWPIPES - A system for cleaning at least one filter in a baghouse and an associated method for providing the system. The at least one filter separate a dirty gas chamber from a clean gas chamber, and filters at least one substance from a gas. The system includes a supply of compressed air and a blowpipe to direct the air at the at least one filter to dislodge a collected amount of the at least one substance from the at least one filter. The blowpipe has a cross-sectional flow area through which the compressed air flows. A valve controls provision of the compressed air. The valve has a cross-sectional flow area though which the compressed gas flows. The cross-sectional area of the valve is smaller than the cross-sectional area of the blowpipe to provide for air pressure at the valve to be greater than air pressure at the blowpipe. | 11-04-2010 |
20100218471 | HEPA (H-10) PERFORMANCE SYNTHETIC NONWOVEN AND NANOFIBER COMPOSITE FILTER MEDIA - A composite filter media structure and an associated method of making are provided. The structure includes a base substrate that includes a nonwoven fabric substrate formed from a plurality of bicomponent synthetic fibers using a spunbond process. The composite filter media structure includes a nanofiber layer deposited on one side of the base substrate by an electro-blown spinning process. In one aspect, the base substrate and the nanofiber layer are configured to provide at least an 85% filtration efficiency measured in accordance with an ASHRAE 52.2-1999 test method. In another aspect, the nanofiber layer has a basis weight of about 2.0 g/m | 09-02-2010 |
20100129629 | AIR PERMEABLE WATERPROOF BICOMPONENT FILM - A waterproof, vapor-permeable and gas-permeable sheet material and a method of making are provided. The sheet material includes a waterproof microporous layer and a thermoplastic layer attached to the microporous layer. The thermoplastic layer is vapor-permeable and air-permeable. The microporous layer is at least partially integrated with the thermoplastic layer to form a zone that prevents passage of water droplets, while permitting passage of water vapor and air, when a chemical is present on the sheet material that would otherwise cause the microporous layer to permit passage of water droplets. The Zone can be considered to be resistant to chemical interference with at least the waterproof property of the microporous layer and inhibits detachment of the layers. | 05-27-2010 |
20100123312 | RETROFIT ARRANGEMENT FOR PULSE JET DUST COLLECTORS - A method of replacing an existing threaded coupler on an existing tubular fixture secured to a baghouse is provided to couple a pulse jet device to a blowpipe of the baghouse via the existing tubular fixture. The method includes the steps of disconnecting the blowpipe from the existing tubular fixture by removing the threaded coupler therefrom. The method further includes the steps of providing a spacer sleeve arranged co-axially within the existing tubular fixture, and providing a transfer tube arranged co-axially within the spacer sleeve. The method further includes the steps of coupling the transfer tube to the spacer sleeve, coupling the spacer sleeve to the existing tubular fixture, arranging the blowpipe within the spacer sleeve, providing a supply tube coupled to the pulse jet device, and coupling the supply tube to the transfer tube. In one example, the supply tube is flexible. | 05-20-2010 |
20100101195 | TWIST AND LOCK CONNECTION FOR PLEATED FILTER ELEMENT WITH FLANGE-TO-FLANGE LOCKING MEANS - A baghouse and filter assembly are provided for at least partially removing particulate matter from a gas stream. The filter assembly includes first and second filter portions to be coupled together by a coupler for establishing fluid communication between the first and second filter portions when connected. The coupler includes a first coupling portion including a side wall defining an interior passage through which the gas stream can pass in an axial direction between the first and second filter portions, and one or more flanges projecting from said side wall, the one or more flanges supporting a plurality of male studs. The coupler further includes a second coupling portion including a plurality of female keyhole-shaped receivers spaced apart for receiving at least a portion of the male studs and coupling the first coupling portion to the second coupling portion. | 04-29-2010 |
20100086730 | METHOD TO CONNECT BAFFLE & INTERNAL STRUCTURE TO THE OUTER-SHELL OF SLEEPING BAG, INSULATED JACKET AND TENT - A waterproof, insulated multi-layer fabric structure is described, including a first and second layer to bound an interior volume. A baffle layer is located in the bounded volume and undulates between the first layer and second layer. The baffle layer is directly attached to the first layer. Adhesive tape portions are attached to the second layer to eliminate the need of stitching through the second layer, improving the structure's waterproof qualities. The baffle layer is attached to the adhesive tape portions which extend from the second layer. A method for manufacturing the multi-layer structure is also described. | 04-08-2010 |
20100072145 | MEMBRANE TABS - A candle filter includes an end portion, elongate interior structure extending from the end portions and defining a space for a fluid, and a membrane fabric for filtering a substance from the fluid as the fluid passes through the membrane fabric and into the space defined by the interior structure. The membrane fabric extends around the interior structure and to the first end portion. The membrane fabric includes at least one extending tab segment for manipulating to move the membrane fabric relative to the elongate interior structure. An associated method provides an operational candle filter. | 03-25-2010 |
20100071322 | TWIST AND LOCK CONNECTION FOR PLEATED FILTER ELEMENT - A baghouse and filter assembly are provided for at least partially removing particulate matter from a gas stream. The filter assembly includes a first filter portion to be supported within the baghouse adjacent to an opening defined by a tube sheet, a first generally-tubular frame, and a first pleated filter media adjacent to the first generally-tubular frame. A second filter portion includes a second generally-tubular frame and a second pleated filter media disposed adjacent to the second generally-tubular frame. A coupler is provided for connecting the first filter portion to the second filter portion and establishing fluid communication between the first and second filter portions when connected. The coupling includes a first coupling portion including a side wall defining a receiver, as well as a lug clip disposed adjacent to the receiver. The lug clip us substantially-elastically displaced in a radial direction from an unbiased position during connection of the first and second filter portions. | 03-25-2010 |