Patents by Inventor Akiyasu Okamoto
Akiyasu Okamoto 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: 10378758Abstract: In a burner tip, combustion burner, and boiler, the burner tip is provided with: a mixing chamber provided at an inner portion of the tip body; a plurality of first mixed fluid jet holes of which base end portions communicate with the mixing chamber, of which front end portions open on a lateral side of the tip body, and which are placed in circumferential direction of the tip body at predetermined intervals; a fluid fuel supply passage configured to supply a fluid fuel to the mixing chamber; and an atomizing medium supply passage configured to supply an atomizing medium to the mixing chamber, thereby, combustibility is improved by facilitating the mixing of a fluid fuel and an atomizing medium and thus making the size of liquid fuel droplets smaller.Type: GrantFiled: October 2, 2014Date of Patent: August 13, 2019Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Kazuaki Hashiguchi, Akiyasu Okamoto, Hideyuki Hamaya
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Patent number: 10344967Abstract: In a burner tip, combustion burner, and boiler, the burner tip is provided with: a mixing chamber provided at an inner portion of the tip body; a plurality of first mixed fluid jet holes of which base end portions communicate with the mixing chamber, of which front end portions open on a lateral side of the tip body, and which are placed in circumferential direction of the tip body at predetermined intervals; a fluid fuel supply passage configured to supply a fluid fuel to the mixing chamber; and an atomizing medium supply passage configured to supply an atomizing medium to the mixing chamber, thereby, combustibility is improved by facilitating the mixing of a fluid fuel and an atomizing medium and thus making the size of liquid fuel droplets smaller.Type: GrantFiled: October 2, 2014Date of Patent: July 9, 2019Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Kazuaki Hashiguchi, Akiyasu Okamoto, Hideyuki Hamaya
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Publication number: 20160223192Abstract: In a burner tip, combustion burner, and boiler, the burner tip is provided with: a mixing chamber provided at an inner portion of the tip body; a plurality of first mixed fluid jet holes of which base end portions communicate with the mixing chamber, of which front end portions open on a lateral side of the tip body, and which are placed in circumferential direction of the tip body at predetermined intervals; a fluid fuel supply passage configured to supply a fluid fuel to the mixing chamber; and an atomizing medium supply passage configured to supply an atomizing medium to the mixing chamber, thereby, combustibility is improved by facilitating the mixing of a fluid fuel and an atomizing medium and thus making the size of liquid fuel droplets smaller.Type: ApplicationFiled: October 2, 2014Publication date: August 4, 2016Inventors: Kazuaki Hashiguchi, Akiyasu Okamoto, Hideyuki Hamaya
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Publication number: 20160223194Abstract: Provided is a burner that includes: a tubular first outer cylinder (20); a diffuser (21) disposed inside the first outer cylinder (20) and having an inner circumferential surface, a diameter of which gradually increases in a first direction; a first gas nozzle (22) configured to feed a first gas to a radial outer region of the diffuser (21) in the first direction; a second gas nozzle (23) disposed adjacent to the first gas nozzle (22) in a circumferential direction of the first outer cylinder (20) and configured to feed a second gas to the radial outer region of the diffuser (21) in the first direction; and an ignition torch (24) configured to ignite at least one of the second gas and the first gas.Type: ApplicationFiled: July 17, 2014Publication date: August 4, 2016Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Katsuhiko Yokohama, Tsutomu Hamada, Kenji Atarashiya, Akiyasu Okamoto, Hiroaki Uchimura, Kenji Takeno
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Publication number: 20080092789Abstract: To provide a low combustibility fuel firing burner that can ensure high ignition performance and combustion stability even if a gas flow rate is changed along with changes in boiler load or the like. A low combustibility fuel firing burner separates a pulverized low combustibility fuel supplied together with an air with a separator, distributing the separated fuel to a rich portion nozzle and a lean portion nozzle provided in a furnace, and burning the fuel, in which a variable control part such as a core or a flow adjusting/blocking valve is provided in at least one of a high-particle-concentration gas pipe extending from a downstream side of the separator and communicating with the rich portion nozzle and a low-particle-concentration gas pipe extending from the downstream side of the separator and communicating with the lean portion nozzle.Type: ApplicationFiled: October 16, 2007Publication date: April 24, 2008Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Ryuhei Takashima, Koutaro Fujimura, Akiyasu Okamoto, Takayuki Suto, Iwamaro Amano, Toshihiro Hirata
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Patent number: 6659024Abstract: A powdery fuel combustion apparatus disposed on furnace side plane (7) of vertical square body type furnace in which a vertical plane passing through a fuel jetting directional axis (8) does not cross the furnace side plane orthogonally, and thus the workability of furnace wall tubes and burner panel, and the maintainability of burner nozzle are improved. The apparatus includes a burner nozzle (1) that is formed such that the nozzle has right and left non-symmetrical shapes, with respect to a vertical plane passing through axis (8). Also, the nozzle has a tip portion opening lying in an opening plane (2) which coincides or is parallel to the furnace side plane (7).Type: GrantFiled: October 13, 1999Date of Patent: December 9, 2003Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Tadashi Gengo, Kouichi Sakamoto, Masashi Hishida, Tomomitsu Yokoyama, Akiyasu Okamoto
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Patent number: 6053118Abstract: A pulverized fuel combustion burner includes a pulverized fuel and air mixture conduit. A pulverized fuel rich/lean separator is disposed at the axial center of the conduit so that a high concentration mixture is formed at an outer peripheral portion of the conduit and a low concentration mixture is formed at a central portion of the conduit. The pulverized fuel rich/lean separator has a cross-sectional shape which gradually enlarges in the flow direction at an angle to the flow direction. It becomes parallel to the flow direction downstream of the enlarging portion, and terminates in a flat surface that is perpendicular to the axis of the separator. A passage extends through the pulverized fuel rich/lean separator along the axis.Type: GrantFiled: June 3, 1997Date of Patent: April 25, 2000Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Akiyasu Okamoto, Koutaro Fujimura, Hachiro Kawashima, Tadashi Gengo, Kouichi Sakamoto, Mutsuo Kuragasaki
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Patent number: 6024030Abstract: A burner for combustion of a pulverized coal mixture having two kinds of rich and lean concentration has a height of a burner panel reduced and the overall burner simplified. A rich/lean separator (10, 20, 30) is provided within a pulverized coal conduit (2) so that a high concentration mixture is formed in an outer peripheral portion and a low concentration mixture is formed in a central portion within a single pulverized coal conduit. Thus, a rich mixture burner and a lean mixture burner, which have been conventionally provided separately, may be formed into a single burner. Recirculation of air is accelerated by a cutaway slit (20d, 30d) provided in a central portion of the rich/lean separator to make the air flow rate distribution uniform in a pulverized coal nozzle. Also, a duct and an air blow box for the combustion air to be supplied to the pulverized coal flame are not integrally formed continuous in the height direction, but are divided into a plurality of discontinuous units.Type: GrantFiled: June 3, 1997Date of Patent: February 15, 2000Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Akiyasu Okamoto, Kimishiro Tokuda, Koutaro Fujimura, Hachiro Kawashima, Shouichi Kai, Tadashi Gengo, Kouichi Sakamoto
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Patent number: 5842426Abstract: A burner for combustion of a pulverized coal mixture having two kinds of rich and lean concentration has, a height of a burner panel reduced and the overall burner simplified. A rich/lean separator (10, 20, 30) is provided within a pulverized coal conduit (2) so that a high concentration mixture is formed in an outer peripheral portion and a low concentration mixture is formed in a central portion within a single pulverized coal conduit. Thus, a rich mixture burner and a lean mixture burner, which have been conventionally provided separately, may be formed into a single burner. Recirculation of air is accelerated by a cutaway slit (20d, 30d) provided in a central portion of the rich/lean separator to make the air flow rate distribution uniform in a pulverized coal nozzle. Also, a duct and an air blow box for the combustion air to be supplied to the pulverized coal flame are not integrally formed continuous in the height direction, but are divided into a plurality of discontinuous units.Type: GrantFiled: June 15, 1995Date of Patent: December 1, 1998Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Hideaki Ohta, Akiyasu Okamoto, Kimishiro Tokuda, Koutaro Fujimura, Hachiro Kawashima, Shouichi Kai, Tadashi Gengo, Kouichi Sakamoto, Mutsuo Kuragasaki
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Patent number: 5829367Abstract: A burner for combustion of a pulverized coal mixture having two kinds of rich and lean concentration has a height of a burner panel reduced and the overall burner simplified. A rich/lean separator (10, 20, 30) is provided within a pulverized coal conduit (2) so that a high concentration mixture is formed in an outer peripheral portion and a low concentration mixture is formed in a central portion within a single pulverized coal conduit. Thus, a rich mixture burner and a lean mixture burner, which have been conventionally provided separately, may be formed into a single burner. Recirculation of air is accelerated by a cutaway slit (20d, 30d) provided in a central portion of the rich/lean separator to make the air flow rate distribution uniform in a pulverized coal nozzle. Also, a duct and an air blow box for the combustion air to be supplied to the pulverized coal flame are not integrally formed continuous in the height direction, but are divided into a plurality of discontinuous units.Type: GrantFiled: July 24, 1997Date of Patent: November 3, 1998Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Hideaki Ohta, Akiyasu Okamoto, Kimishiro Tokuda, Koutaro Fujimura, Hachiro Kawashima, Shouichi Kai, Tadashi Gengo, Kouichi Sakamoto, Mutsuo Kuragasaki