Patents by Inventor Lars Bøllund
Lars Bøllund 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: 11034606Abstract: An apparatus for the production of a mineral melt burns combustible material in the presence of inorganic material to form a melt. The apparatus includes a circulating combustion chamber which receives a fuel, pre-heated mineral material and a combustion gas so as to melt the mineral material and generate exhaust gases which are separated from the melt. The gases pass through an exhaust pipe to a conduit of a heat exchange system. The apparatus includes a quenching hood for quenching the exhaust gases by drafting a cooling fluid, such as ambient air, into the flow of exhaust gases around the exhaust pipe, and wherein the exhaust gases exit the exhaust pipe inside the hood.Type: GrantFiled: July 19, 2016Date of Patent: June 15, 2021Assignee: ROCKWOOL INTERNATIONAL A/SInventors: Lars Bøllund, Lars Elmekilde Hansen
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Patent number: 9903769Abstract: The present invention concerns a method and an apparatus (12) for measuring the temperature of a fluid stream (11), said apparatus comprising a movable frame (13, 14) having first end facing towards the fluid stream to be measured and an oppositely directed second end; a beam splitter (9) which is movably arranged in the frame for advancement into said fluid stream to open the fluid stream; an optical temperature measurement device (8) for determining the temperature of the fluid stream by measuring the thermal radiation from the fluid stream; and control means for controlling the movement of the frame and the beam splitter and controlling the performance of the optical temperature measurement device.Type: GrantFiled: September 21, 2012Date of Patent: February 27, 2018Assignee: Rockwool International A/SInventors: Haosheng Zhou, Jeroen Petrus Wilhelmus Sap, Lars Bøllund, Per Steenbjerg
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Patent number: 9688561Abstract: The invention relates to a method of making a mineral melt comprising providing a circulating combustion chamber (1) which comprises an upper zone (2), a lower zone (3) and a base zone (4), injecting particulate fuel, particulate mineral material and primary combustion gas which has optionally an oxygen level of at least 25% by volume into the upper zone of the circulating combustion chamber so that the fuel undergoes pyrolysis in the upper zone to produce char, thereby melting the particulate mineral materials to form a mineral melt and generating exhaust gases, injecting secondary combustion gas which has optionally an Oxygen level of at least 25% by volume into the lower zone of the circulating combustion chamber so that the char combusts, thereby completing combustion of the fuel, and separating the mineral melt from the hot exhaust gases so that the hot exhaust gases pass though an outlet in the circulating combustion chamber and the mineral melt collects in the base zone.Type: GrantFiled: January 14, 2008Date of Patent: June 27, 2017Assignee: ROCKWOOL INTERNATIONAL A/SInventors: Lars Elmekilde Hansen, Lars Boellund, Lars Kresten Hansen, Peter Farkas Binderup Hansen, Leif Moeller Jensen
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Publication number: 20160326039Abstract: An apparatus for the production of a mineral melt burns combustible material in the presence of inorganic material to form a melt. The apparatus includes a circulating combustion chamber which receives a fuel, pre-heated mineral material and a combustion gas so as to melt the mineral material and generate exhaust gases which are separated from the melt. The gases pass through an exhaust pipe to a conduit of a heat exchange system. The apparatus includes a quenching hood for quenching the exhaust gases by drafting a cooling fluid, such as ambient air, into the flow of exhaust gases around the exhaust pipe, and wherein the exhaust gases exit the exhaust pipe inside the hood.Type: ApplicationFiled: July 19, 2016Publication date: November 10, 2016Inventors: Lars Bøllund, Lars Elmekilde Hansen
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Publication number: 20140254627Abstract: The present invention concerns a method and an apparatus (12) for measuring the temperature of a fluid stream (11), said apparatus comprising a movable frame (13, 14) having first end facing towards the fluid stream to be measured and an oppositely directed second end; a beam splitter (9) which is movably arranged in the frame for advancement into said fluid stream to open the fluid stream; an optical temperature measurement device (8) for determining the temperature of the fluid stream by measuring the thermal radiation from the fluid stream; and control means for controlling the movement of the frame and the beam splitter and controlling the performance of the optical temperature measurement device.Type: ApplicationFiled: September 21, 2012Publication date: September 11, 2014Applicant: ROCKWOOL INTERNATIONAL A/SInventors: Haosheng Zhou, Jeroen Petrus Wilhelmus Sap, Lars Bøllund, Per Steenbjerg
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Patent number: 8574475Abstract: The present invention relates to a method of making mineral fibers, comprising providing a circulating combustion chamber (1) which comprises a top section (2), a bottom section (3) and a base section (4), injecting primary fuel, particulate mineral material and primary combustion gas into the top section of the circulating combustion chamber and combusting the primary fuel thereby melting the particulate material to form a mineral melt and generating exhaust gases, separating the mineral melt from the exhaust gases wherein the exhaust gases pass through an outlet (8) in the circulating combustion chamber and the mineral melt collects in the base section of the circulating combustion chamber, injecting secondary fuel, which comprises liquid or gaseous fuel, and secondary combustion gas into the bottom section of the circulating combustion chamber to form a flame in the bottom section which heats the melt, and flowing a stream of the collected melt through an outlet (15) in the base section to a centrifugal fiType: GrantFiled: January 14, 2008Date of Patent: November 5, 2013Assignee: Rockwool International A/SInventors: Lars Elmekilde Hansen, Lars Boellund, Lars Kresten Hansen, Peter Farkas Bindercup Hansen, Leif Moeller Jensen
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Patent number: 8176754Abstract: Particulate mineral material suitable for forming a fiberisable melt is melted in a flame formed by combustion of powdered carbonaceous fuel with preheated air and the particulate mineral material is then preheated, and the exhaust gases are subjected to NOx reduction, in a cyclone preheater (22).Type: GrantFiled: June 26, 2002Date of Patent: May 15, 2012Assignee: Rockwool International A/SInventors: Leif Moeller Jensen, Ole Andreasen, Hans Hoyer, Trine Frickmann, Lars Boellund
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Publication number: 20100109197Abstract: The present invention relates to a method of making mineral fibres, comprising providing a circulating combustion chamber (1) which comprises a top section (2), a bottom section (3) and a base section (4), injecting primary fuel, particulate mineral material and primary combustion gas into the top section of the circulating combustion chamber and combusting the primary fuel thereby melting the particulate material to form a mineral melt and generating exhaust gases, separating the mineral melt from the exhaust gases wherein the exhaust gases pass through an outlet (8) in the circulating combustion chamber and the mineral melt collects in the base section of the circulating combustion chamber, injecting secondary fuel, which comprises liquid or gaseous fuel, and secondary combustion gas into the bottom section of the circulating combustion chamber to form a flame in the bottom section which heats the melt, and flowing a stream of the collected melt through an outlet (15) in the base section to a centrifugal fiType: ApplicationFiled: January 14, 2008Publication date: May 6, 2010Applicant: Rockwool International A/SInventors: Lars Elmekilde Hansen, Lars Boellund, Lars Kresten Hansen, Peter Farkas Bindercup Hansen, Leif Moeller Jensen
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Publication number: 20100043496Abstract: The invention relates to a method of making a mineral melt comprising providing a circulating combustion chamber (1) which comprises an upper zone (2), a lower zone (3) and a base zone (4), injecting particulate fuel, particulate mineral material and primary combustion gas which has optionally an oxygen level of at least 25% by volume into the upper zone of the circulating combustion chamber so that the fuel undergoes pyrolysis in the upper zone to produce char, thereby melting the particulate mineral materials to form a mineral melt and generating exhaust gases, injecting secondary combustion gas which has optionally an Oxygen level of at least 25% by volume into the lower zone of the circulating combustion chamber so that the char combusts, thereby completing combustion of the fuel, and separating the mineral melt from the hot exhaust gases so that the hot exhaust gases pass though an outlet in the circulating combustion chamber and the mineral melt collects in the base zone.Type: ApplicationFiled: January 14, 2008Publication date: February 25, 2010Applicant: Rockwool International A/SInventors: Lars Elmekilde Hansen, Lars Boellund, Lars Kresten Hansen, Peter Farkas Binderup Hansen, Leif Moeller Jensen
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Publication number: 20050172677Abstract: Particulate mineral material suitable for forming a fiberisable melt is melted in a flame formed by combustion of powdered carbonaceous fuel with preheated air and the particulate mineral material is then preheated, and the exhaust gases are subjected to NOx reduction, in a cyclone preheater (22).Type: ApplicationFiled: June 26, 2002Publication date: August 11, 2005Inventors: Leif Jensen, Ole Andreasen, Hans Hoyer, Trine Frickmann, Lars Boellund