Patents Assigned to BHA Group, Inc.
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Publication number: 20130180224Abstract: 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.Type: ApplicationFiled: January 16, 2012Publication date: July 18, 2013Applicant: BHA Group, Inc.Inventor: Tian Xuan Zhang
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Publication number: 20130104929Abstract: A pulse detonation system is provided for delivering a shock wave to an operating device to clean accumulation or buildup of particles within the operating device. The pulse detonation system includes a support structure, a camera apparatus and a pulse detonation chamber. The pulse detonation chamber is supported by the support structure and extends into the interior portion of the operating device. The pulse detonation chamber receives fuel and air to create a shock wave. The shock wave exits the pulse detonation chamber and interacts with the buildup of particles in the operating device. The pulse detonation chamber includes a plurality of pulse detonation tubes that are detachable and portable, such that the pulse detonation system can be detached and moved from a first location to a second location.Type: ApplicationFiled: October 26, 2011Publication date: May 2, 2013Applicant: BHA Group, Inc.Inventors: Tian Xuan Zhang, Peter Martin Maly, David M. Chapin
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Patent number: 8421045Abstract: An article for providing protection from electromagnetic energy, and an associated method for provision of such. The article includes conductive fibers extending within the article, varistor material dispersed and secured within the article, and ferrite material dispersed and secured within the article.Type: GrantFiled: August 26, 2011Date of Patent: April 16, 2013Assignee: BHA Group, Inc.Inventors: Daniel Qi Tan, Patricia Chapman Irwin, Wei Zhang
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MEMBRANE DISTILLATION MODULES USING OLEOPHOBICALLY AND ANTIMICROBIALLY TREATED MICROPOROUS MEMBRANES
Publication number: 20130068689Abstract: 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.Type: ApplicationFiled: September 15, 2011Publication date: March 21, 2013Applicant: BHA Group, Inc.Inventors: Vishal Bansal, Christopher Keller -
Publication number: 20130056034Abstract: 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.Type: ApplicationFiled: September 7, 2011Publication date: March 7, 2013Applicant: BHA GROUP, Inc.Inventors: Tian Xuan Zhang, David Michael Chapin
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Patent number: 8334227Abstract: A waterproof, vapor-permeable and air-permeable sheet material. The sheet material includes a waterproof microporous polymer substrate and a microporous thermoplastic coating layer attached to the polymer substrate. The thermoplastic coating layer is vapor-permeable and air-permeable. The thermoplastic coating layer is at least partially interpenetrated into pores of the polymer substrate forming an interface 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 polymer substrate to permit passage of water droplets. The interface is resistant to chemical interference with at least the waterproof property of the sheet material.Type: GrantFiled: April 2, 2009Date of Patent: December 18, 2012Assignee: BHA Group, Inc.Inventors: Yit-Hong Tee, Taher Abujoudeh
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Patent number: 8333826Abstract: 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.Type: GrantFiled: February 10, 2010Date of Patent: December 18, 2012Assignee: BHA Group, Inc.Inventors: Alan Smithies, Karmin Lorraine Olson
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Patent number: 8308834Abstract: A composite filter media structure includes, in an exemplary embodiment, a base substrate that includes a nonwoven synthetic fabric formed from a plurality of fibers with a spunbond process. The base substrate has a minimum filtration efficiency of about 50%, measured in accordance with ASHRAE 52.2-1999 test procedure A nanofiber layer is deposited on one side of the base substrate. The composite filter media structure has a minimum filtration efficiency of about 75%, measured in accordance with ASHRAE 52.2-1999 test procedure.Type: GrantFiled: August 1, 2008Date of Patent: November 13, 2012Assignee: BHA Group, Inc.Inventors: Alan Smithies, Jack T. Clements, David Charles Jones, Hyun Sung Lim
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Publication number: 20120279128Abstract: 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.Type: ApplicationFiled: May 3, 2011Publication date: November 8, 2012Applicant: BHA Group, Inc.Inventors: Tian Xuan Zhang, David Michael Chapin, Robert Warren Taylor
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Patent number: 8282713Abstract: 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.Type: GrantFiled: December 16, 2009Date of Patent: October 9, 2012Assignee: BHA Group, Inc.Inventors: Alan Smithies, Karmin Lorraine Olson
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Patent number: 8262780Abstract: 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 surface layer deposited on one side of the base substrate where a thermal lamination process can be used to combine the base substrate and the surface layer. The surface layer is formed from a microporous expanded polytetrafluoroethylene membrane. In one aspect, the base substrate and the surface layer are configured to provide greater than 95% and equal to or less than 99.5% filtration efficiency measured in accordance with an EN 1822 test method. In another aspect, the filter media includes an embossing pattern or a plurality of corrugations formed using opposing rollers at a temperature of about 90° C. to about 140° C.Type: GrantFiled: July 22, 2009Date of Patent: September 11, 2012Assignee: BHA Group, IncInventors: Alan Smithies, Jack T. Clements, Cynthia Polizzi
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Patent number: 8236093Abstract: 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.Type: GrantFiled: September 16, 2009Date of Patent: August 7, 2012Assignee: BHA Group, Inc.Inventors: Robert Warren Taylor, James Easel Roberts, Charles Michael Booth
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Patent number: 8206481Abstract: 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/m2 to about 3.0 g/m2.Type: GrantFiled: February 27, 2009Date of Patent: June 26, 2012Assignee: BHA Group, Inc.Inventors: Alan Smithies, Robert Henry Devine, II, Jack T. Clements
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Patent number: 8147587Abstract: 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.Type: GrantFiled: April 15, 2011Date of Patent: April 3, 2012Assignee: BHA Group, Inc.Inventors: Vishal Bansal, Peter Martin Maly, Robert Warren Taylor
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Publication number: 20120066890Abstract: 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.Type: ApplicationFiled: September 16, 2010Publication date: March 22, 2012Applicant: BHA Group, Inc.Inventor: Martin Gregory Hatfield
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Publication number: 20120061923Abstract: 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.Type: ApplicationFiled: September 10, 2010Publication date: March 15, 2012Applicant: BHA Group, Inc.Inventor: Nusrat Farzana
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Publication number: 20110296989Abstract: 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.Type: ApplicationFiled: June 4, 2010Publication date: December 8, 2011Applicant: BHA Group, Inc.Inventors: Robert Taylor, Karim Younsi, David F. Johnston, Yingneng Zhou, Yar+e,acu u+ee Najem M+e,acu e+ee ndez Hern+e,acu a+ee ndez, Prabhakar Neti
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Patent number: 8057878Abstract: 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.Type: GrantFiled: October 8, 2008Date of Patent: November 15, 2011Assignee: BHA Group, Inc.Inventors: Alfred Lo, Taher Abujoudeh
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Patent number: 8048516Abstract: 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.Type: GrantFiled: November 21, 2008Date of Patent: November 1, 2011Assignee: BHA Group, Inc.Inventors: Yit-Hong Tee, Taher Abujoudeh, Cynthia Polizzi
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Publication number: 20110252757Abstract: 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.Type: ApplicationFiled: April 20, 2010Publication date: October 20, 2011Applicant: BHA Group, Inc.Inventors: Karmin Lorraine Olson, Jason Mei