Patents by Inventor Anders Lugnet
Anders Lugnet has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9689614Abstract: A method for combustion in an industrial furnace having fuel and a first oxidizer to heat a material includes arranging at least one lance in a sidewall of the furnace; supplying a second oxidizer with an oxygen content of at least 85 percent by weight in the form of a jet traveling at at least sonic velocity to the interior of the furnace through the at least one lance; running the jet of the second oxidizer in the horizontal plane above the material between and essentially in parallel with two consecutive rows of the roof burners; balancing an amount of the second oxidizer supplied per time unit so that the oxygen content supplied via the second oxidizer constitutes at least 50 percent by weight of the total supplied oxygen per time unit in the furnace.Type: GrantFiled: September 9, 2011Date of Patent: June 27, 2017Assignee: Linde AktiengesellschaftInventors: Anders Lugnet, Tomas Ekman
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Patent number: 9341369Abstract: Burner device (2) for an industrial furnace (1) comprising a channel (3) for fuel, a channel (4) for a first oxidant, an outlet (9) for flue gases, a control device (10) and a heat buffer (7), where the first oxidant and the flue gases alternating are led through the heat buffer (7). The invention is characterized in that a separate lancing device (6) is arranged to supply a second oxidant to the burner device (2).Type: GrantFiled: March 12, 2014Date of Patent: May 17, 2016Assignee: AGA ABInventors: Tomas Ekman, Anders Lugnet
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Patent number: 9004910Abstract: Method for combustion of a fuel uses an existing air burner (1), including a first supply opening (5) for fuel and a second supply opening (7) for air, which supply openings (5,7) open out into a combustion zone (3). The method is characterised in that a gaseous fuel with an LHV (Lower Heating Value) of less than 7.5 MJ/Nm3 is supplied through the second supply opening (7), in that an oxidant including at least 85 percent by weight oxygen is also supplied to the combustion zone (3) through a supply device for oxidant, and in that the gaseous fuel is caused to be combusted with the oxidant in the combustion zone (3).Type: GrantFiled: February 3, 2011Date of Patent: April 14, 2015Assignee: Linde AGInventors: Tomas Ekman, Anders Lugnet, Ola Ritzén
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Patent number: 8899970Abstract: Burner device (2) for an industrial furnace (1) comprising a channel (3) for fuel, a channel (4) for a first oxidant, an outlet (9) for flue gases, a control device (10) and a heat buffer (7), where the first oxidant and the flue gases alternatingly are led through the heat buffer (7). The invention is characterized in that a separate lancing device (6) is arranged to supply a second oxidant to the burner device (2).Type: GrantFiled: December 9, 2008Date of Patent: December 2, 2014Assignee: AGA ABInventors: Tomas Ekman, Anders Lugnet
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Publication number: 20140193758Abstract: Burner device (2) for an industrial furnace (1) comprising a channel (3) for fuel, a channel (4) for a first oxidant, an outlet (9) for flue gases, a control device (10) and a heat buffer (7), where the first oxidant and the flue gases alternating are led through the heat buffer (7). The invention is characterized in that a separate lancing device (6) is arranged to supply a second oxidant to the burner device (2).Type: ApplicationFiled: March 12, 2014Publication date: July 10, 2014Applicant: AGA ABInventors: Tomas EKMAN, Anders LUGNET
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Patent number: 8689708Abstract: Method and device for combusting a solid phase fuel, where the fuel is caused, by the help of a non-pneumatic feeding element (11), to be fed to an inlet opening (11a) in a burner device (10), where the burner device (10) includes a first inlet (13a) for the oxidant through which an oxidant is caused to flow via a first supply conduit (13). The first inlet (13a) for oxidant is arranged in the form of a first opening arranged by the inlet opening, through which the oxidant is caused to flow out, through a burner pipe (16) and out through a burner orifice (17) to a combustion space (18), so that the oxidant by ejector action causes the fuel to be conveyed through the burner pipe and out through the burner orifice (17), and water vapour is added to the oxidant before the oxidant reacts with the fuel.Type: GrantFiled: April 22, 2009Date of Patent: April 8, 2014Assignee: AGA ABInventors: Tomas Ekman, Anders Lugnet
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Patent number: 8277720Abstract: Device for heating metal material includes an elongated DFI burner arranged to be driven with gaseous oxidant and gaseous fuel and to be displaceable and longitudinally arranged with respect to the metal material. The burner includes longitudinal tubular vessels for fuel and for oxidant, arranged in parallel to one another and relative to the surface of the metal material. Each of these vessels has an opening through which the fuel and oxidant flow out and then converge in an ignition zone outside the respective vessels, where a flame is generated. Supply devices are arranged via a regulator to keep the pressure constant throughout the respective vessel during operation. Each of the vessels has a longitudinally displaceable piston for controlling the longitudinal extension of the flame in the longitudinal direction of the vessels.Type: GrantFiled: September 12, 2008Date of Patent: October 2, 2012Assignee: AGA ABInventors: Carl-Lennart Axelsson, Ola Ritzen, Anders Lugnet, Mattias Ekblom
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Publication number: 20120082946Abstract: A method for combustion in an industrial furnace having fuel and a first oxidizer to heat a material includes arranging at least one lance in a sidewall of the furnace; supplying a second oxidizer with an oxygen content of at least 85 percent by weight in the form of a jet traveling at at least sonic velocity to the interior of the furnace through the at least one lance; running the jet of the second oxidizer in the horizontal plane above the material between and essentially in parallel with two consecutive rows of the roof burners; balancing an amount of the second oxidizer supplied per time unit so that the oxygen content supplied via the second oxidizer constitutes at least 50 percent by weight of the total supplied oxygen per time unit in the furnace.Type: ApplicationFiled: September 9, 2011Publication date: April 5, 2012Inventors: Anders LUGNET, Tomas Ekman
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Patent number: 8075303Abstract: Method for homogenizing the heat distribution as well as decreasing the amount of NOx in combustion products when operating an industrial furnace with at least one conventional burner using air as an oxidant. An additional oxidant including at least 50% oxygen gas is caused to stream into the furnace through a lance. The total amount of oxygen supplied is balanced against the amount of fuel being supplied through the air burner. Firstly, the combination of at least 40% of the supplied oxygen is supplied through the additional oxidant, the lance is arranged at a distance from the air burner of at least 0.3 meters, and the additional oxidant streams into the furnace through the lance with at least sonic velocity, and secondly the additional oxidant is supplied only when the air burner is operated at a certain lowest power or at a higher power.Type: GrantFiled: March 22, 2010Date of Patent: December 13, 2011Assignee: AGA ABInventors: Tomas Ekman, Ola Ritzén, Anders Lugnet, Mats Gartz
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Publication number: 20110195366Abstract: Method for combustion of a fuel uses an existing air burner (1), including a first supply opening (5) for fuel and a second supply opening (7) for air, which supply openings (5, 7) open out into a combustion zone (3). The method is characterised in that a gaseous fuel with an LHV (Lower Heating Value) of less than 7.5 MJ/Nm3 is supplied through the second supply opening (7), in that an oxidant including at least 85 percent by weight oxygen is also supplied to the combustion zone (3) through a supply device for oxidant, and in that the gaseous fuel is caused to be combusted with the oxidant in the combustion zone (3).Type: ApplicationFiled: February 3, 2011Publication date: August 11, 2011Applicant: LINDE AGInventors: Tomas EKMAN, Anders LUGNET, Ola RITZÉN
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Publication number: 20110187031Abstract: Device for heating a metal material, includes an elongated DFI burner device, arranged to be driven with gaseous oxidant and gaseous fuel and to be displaceable and longitudinally arranged with respect to the metal material. The device has supply devices for fuel and oxidant. The burner device includes longitudinal, tubular vessels for fuel and for oxidant, arranged in parallel to one another and relative to the surface of the metal material. Each vessel has one or more openings arranged along the vessel, through which the fuel and oxidant are arranged to flow out and then converge in an ignition zone outside the respective vessels, where a flame is generated. The respective supply devices are arranged via a regulator to keep the pressure constant throughout the vessel in question during operation. Each vessel has a longitudinally displaceable piston for controlling the longitudinal extension of the flame in the longitudinal direction of the vessels.Type: ApplicationFiled: September 12, 2008Publication date: August 4, 2011Applicant: AGA ABInventors: Carl-Lennart Axelsson, Ola Ritzen, Anders Lugnet, Mattias Ekblom
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Publication number: 20110091823Abstract: Method and device for combusting a solid phase fuel, where the fuel is caused, by the help of a non-pneumatic feeding element (11), to be fed to an inlet opening (11a) in a burner device (10), where the burner device (10) includes a first inlet (13a) for the oxidant through which an oxidant is caused to flow via a first supply conduit (13). The first inlet (13a) for oxidant is arranged in the form of a first opening arranged by the inlet opening, through which the oxidant is caused to flow out, through a burner pipe (16) and out through a burner orifice (17) to a combustion space (18), so that the oxidant by ejector action causes the fuel to be conveyed through the burner pipe and out through the burner orifice (17), and water vapour is added to the oxidant before the oxidant reacts with the fuel.Type: ApplicationFiled: April 22, 2009Publication date: April 21, 2011Inventors: Tomas Ekman, Anders Lugnet
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Publication number: 20100239989Abstract: Method for homogenizing the heat distribution as well as decreasing the amount of NOx in combustion products when operating an industrial furnace with at least one conventional burner using air as an oxidant. An additional oxidant including at least 50% oxygen gas is caused to stream into the furnace through a lance. The total amount of oxygen supplied is balanced against the amount of fuel being supplied through the air burner. Firstly, the combination of at least 40% of the supplied oxygen is supplied through the additional oxidant, the lance is arranged at a distance from the air burner of at least 0.3 meters, and the additional oxidant streams into the furnace through the lance with at least sonic velocity, and secondly the additional oxidant is supplied only when the air burner is operated at a certain lowest power or at a higher power.Type: ApplicationFiled: March 22, 2010Publication date: September 23, 2010Applicant: AGA ABInventors: Tomas EKMAN, Ola RITZÉN, Anders LUGNET, Mats GARTZ
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Patent number: 7594811Abstract: A method and apparatus relating to the combustion of a fuel with an oxidant in a heating furnace, wherein the fuel and the oxidant are delivered to a burner head. In a first method step fuel and oxidant are emitted from the burner head in close proximity to each other, so that combustion essentially takes place close to and at a small distance outward of the burner head, and until a temperature is reached in the furnace space that exceeds the spontaneous combustion temperature of the fuel. In a second method step the fuel and the oxidant are instead emitted from the burner head at a mutual distance apart, so that combustion takes place at a distance from the burner head corresponding to at least the diameter of the burner head and outward of the burner head.Type: GrantFiled: August 9, 2005Date of Patent: September 29, 2009Assignee: AGA ABInventors: Anders Lugnet, Tomas Ekman
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Publication number: 20090148799Abstract: Burner device (2) for an industrial furnace (1) comprising a channel (3) for fuel, a channel (4) for a first oxidant, an outlet (9) for flue gases, a control device (10) and a heat buffer (7), where the first oxidant and the flue gases alternatingly are led through the heat buffer (7). The invention is characterised in that a separate lancing device (6) is arranged to supply a second oxidant to the burner device (2).Type: ApplicationFiled: December 9, 2008Publication date: June 11, 2009Applicant: AGA ABInventors: Tomas EKMAN, Anders LUGNET
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Publication number: 20070172780Abstract: A method and apparatus relating to the combustion of a fuel with an oxidant in a heating furnace, wherein the fuel and the oxidant are delivered to a burner head. In a first method step fuel and oxidant are emitted from the burner head in close proximity to each other, so that combustion essentially takes place close to and at a small distance outward of the burner head, and until a temperature is reached in the furnace space that exceeds the spontaneous combustion temperature of the fuel. In a second method step the fuel and the oxidant are instead emitted from the burner head at a mutual distance apart, so that combustion takes place at a distance from the burner head corresponding to at least the diameter of the burner head and outward of the burner head.Type: ApplicationFiled: August 9, 2005Publication date: July 26, 2007Applicant: AGA ABInventors: Anders Lugnet, Tomas Ekman
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Publication number: 20060278100Abstract: A seal for burners for the combustion of fossil fuels with an oxidant gas that contains a high fraction of gaseous oxygen. The burner includes a burner body with a cylindrical opening within which a cylindrical nozzle is removably positioned. The nozzle includes axial channels for the supply of fuel and oxidant gas. One, two or more parallel annular grooves are provided in the outer peripheral surface of the cylindrical nozzle. Each groove is arranged to support a sealing ring that is split or discontinuous at one location along its periphery. Each ring is arranged to lie in contact with the inner surface of the cylindrical opening when the nozzle is mounted in the burner body, with the discontinuities of the rings circumferentially offset relative to each other.Type: ApplicationFiled: March 16, 2006Publication date: December 14, 2006Applicant: AGA ABInventors: Tomas Ekman, Anders Lugnet
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Publication number: 20050239005Abstract: A method and an apparatus for heat-treatment of materials, preferably metals, are provided. The method comprises the following steps: providing and maintaining a flame by supplying a burner with fuel and gas containing at least 80 percent by volume oxygen; creating an oxygen-hot exhaust mixture by recirculating exhausts from the flame to the gas containing oxygen by means of an ejector effect; mixing the oxygen-exhaust mixture and the fuel; and providing a secondary recirculation by recirculating exhausts from the flame to the oxygen-exhaust-fuel mixture. The method and apparatus allow for extremely low NOx emissions and high efficiency, resulting in an environmentally friendly and at the same time cost effective process.Type: ApplicationFiled: September 25, 2003Publication date: October 27, 2005Applicant: Linde AGInventors: Anders Lugnet, Tomas Ekman