Patents by Inventor Atsushi Yuasa
Atsushi Yuasa 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: 11939915Abstract: A raw material fluid treatment plant provided with a raw material reaction apparatus for reacting a raw material fluid to form a reaction gas. The raw material reaction apparatus includes preheaters and a reactor. The preheaters are heat exchangers that perform heat exchange between a second heat transfer medium and the raw material fluid to heat the raw material fluid. The reactor is a heat exchanger that performs heat exchange between a first heat transfer medium differing from the second heat transfer medium and the raw material fluid having been heated by the preheaters to heat and react the raw material fluid.Type: GrantFiled: March 9, 2020Date of Patent: March 26, 2024Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hideyuki Uechi, Hidefumi Araki, Satoshi Tanimura, Masakazu Nose, Jun Sasahara, Yukio Tanaka, Atsushi Yuasa
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Patent number: 11702988Abstract: An ammonia decomposition facility includes a heating medium line configured to flow a heating medium heated by heat generated by a gas turbine, an ammonia supply line configured to flow ammonia, an ammonia decomposition device, and an ammonia removal device. The ammonia decomposition device is configured to use heat of the heating medium from the heating medium line, thermally decompose ammonia from the ammonia supply line, and generate a decomposition gas containing hydrogen, nitrogen, and residual ammonia. The ammonia removal device is configured to remove the residual ammonia contained in the decomposition gas from the ammonia decomposition device.Type: GrantFiled: March 13, 2020Date of Patent: July 18, 2023Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hidefumi Araki, Satoshi Tanimura, Masakazu Nose, Jun Sasahara, Hideyuki Uechi, Yukio Tanaka, Atsushi Yuasa
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Publication number: 20220154646Abstract: An ammonia decomposition facility includes a heating medium line configured to flow a heating medium heated by heat generated by a gas turbine, an ammonia supply line configured to flow ammonia, an ammonia decomposition device, and an ammonia removal device. The ammonia decomposition device is configured to use heat of the heating medium from the heating medium line, thermally decompose ammonia from the ammonia supply line, and generate a decomposition gas containing hydrogen, nitrogen, and residual ammonia. The ammonia removal device is configured to remove the residual ammonia contained in the decomposition gas from the ammonia decomposition device.Type: ApplicationFiled: March 13, 2020Publication date: May 19, 2022Inventors: Hidefumi ARAKI, Satoshi TANIMURA, Masakazu NOSE, Jun SASAHARA, Hideyuki UECHI, Yukio TANAKA, Atsushi YUASA
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Publication number: 20220099021Abstract: A raw material fluid treatment plant provided with a raw material reaction apparatus for reacting a raw material fluid to form a reaction gas. The raw material reaction apparatus includes preheaters and a reactor. The preheaters are heat exchangers that perform heat exchange between a second heat transfer medium and the raw material fluid to heat the raw material fluid. The reactor is a heat exchanger that performs heat exchange between a first heat transfer medium differing from the second heat transfer medium and the raw material fluid having been heated by the preheaters to heat and react the raw material fluid.Type: ApplicationFiled: March 9, 2020Publication date: March 31, 2022Inventors: Hideyuki UECHI, Hidefumi ARAKI, Satoshi TANIMURA, Masakazu NOSE, Jun SASAHARA, Yukio TANAKA, Atsushi YUASA
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Patent number: 10605455Abstract: In this combustion burner and boiler, interference of ignition in a flame stabilizer is suppressed and flame stabilizing performance is improved by providing: a fuel nozzle which ejects a fuel gas that is a mixture of pulverized coal and air; a combustion air nozzle which ejects a fuel gas combustion air from outside of the fuel nozzle; a secondary air nozzle which ejects secondary air from the outside of the combustion air nozzle; and a flame stabilizer which comprises a first flame stabilizer main body which is arranged at the leading end of the fuel nozzle and separated by a prescribed space from the inner wall surface of the fuel nozzle and which forms a ring shape having as the center an axial line along the ejection direction of the fuel gas.Type: GrantFiled: March 17, 2016Date of Patent: March 31, 2020Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Keigo Matsumoto, Atsushi Yuasa, Yukihiro Tominaga, Akimasa Takayama, Kazuhiro Domoto, Keita Tsukahara
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Patent number: 10197270Abstract: A combustion burner for a boiler includes: an inner cylinder defining a fuel supply passage for supplying fuel; an outer cylinder surrounding the inner cylinder and defining an air supply passage between the inner cylinder and the outer cylinder; and a swirler in the air supply passage, the swirler being configured to swirl air in the air supply passage. The swirler includes a plurality of blades radially disposed between the inner cylinder and the outer cylinder, the plurality of blades extending from an air-supply side toward a combustion-space side of the air supply passage, and each of the plurality of blades having, at least on an inner cylinder side of the blade, a section with a thickness varied in a burner axial direction, the thickness being smaller at an edge portion on the combustion-space side than at a maximum-thickness section of the blade.Type: GrantFiled: March 11, 2014Date of Patent: February 5, 2019Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Yoshiaki Arakawa, Kazuaki Hashiguchi, Keiji Takeno, Atsushi Yuasa, Takahiro Jojima, Hideta Ogawa, Shogo Sawa
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Patent number: 10107501Abstract: An object is to realize combustion flame which can further reduce the amount of NOx generation. A combustor (14) includes a pilot nozzle (40); a plurality of main nozzles (44) arranged apart from the pilot nozzle (40) in the circumferential direction on the outer peripheral side of the pilot nozzle (40) and configured to perform premix combustion; a combustor basket (34) surrounding the pilot nozzle (40) and each main nozzle (44); an outlet outer ring (50) provided at a tip end of the combustor basket (34); and a combustion liner (36) fitted, at an inner surface thereof, onto the outer periphery of the combustor basket (34) and surrounding the outlet outer ring (50). The outlet outer ring (50) is formed parallel to an inner wall surface (66) of the combustion liner (36).Type: GrantFiled: March 19, 2014Date of Patent: October 23, 2018Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Satoshi Takiguchi, Mitsunori Isono, Atsushi Yuasa, Eisaku Ito, Shigemi Mandai
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Patent number: 9933162Abstract: A combustor includes: a pilot burner; a plurality of main burners, each of which is provided radially and outwardly along a circumferential direction about the pilot burner, and including a main nozzle disposed in a main burner cylinder; and an extension tube provided to extend toward a downstream side from the main burner cylinder of each of the main burners. The extension tube has a circular inlet communicating with the main burner cylinder, and an outlet at the downstream side comprising two radial edges parallel to the radial direction and two circumferential edges formed along the circumferential direction so as to connect both ends of the radial edges. The combustor further includes an air passage formed outside of the main burner cylinder; and an inner communication hole (formed at the side of the inlet of the extension tube and at a position corresponding to the radially and inwardly circumferential edge for allowing communication between the air passage and the inside of the extension tube.Type: GrantFiled: January 10, 2014Date of Patent: April 3, 2018Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Kei Inoue, Keijiro Saito, Hikaru Katano, Sosuke Nakamura, Mitsunori Isono, Atsushi Yuasa
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Publication number: 20180031232Abstract: In this combustion burner and boiler, interference of ignition in a flame stabilizer is suppressed and flame stabilizing performance is improved by providing: a fuel nozzle which ejects a fuel gas that is a mixture of pulverized coal and air; a combustion air nozzle which ejects a fuel gas combustion air from outside of the fuel nozzle; a secondary air nozzle which ejects secondary air from the outside of the combustion air nozzle; and a flame stabilizer which comprises a first flame stabilizer main body which is arranged at the leading end of the fuel nozzle and separated by a prescribed space from the inner wall surface of the fuel nozzle and which forms a ring shape having as the center an axial line along the ejection direction of the fuel gas.Type: ApplicationFiled: March 17, 2016Publication date: February 1, 2018Applicant: Mitsubishi Hitachi Power Systems, Ltd.Inventors: Keigo MATSUMOTO, Atsushi YUASA, Yukihiro TOMINAGA, Akimasa TAKAYAMA, Kazuhiro DOMOTO, Keita TSUKAHARA
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Patent number: 9863637Abstract: Provided is a combustor that is made compact and achieves NOx reduction.Type: GrantFiled: August 13, 2009Date of Patent: January 9, 2018Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Satoshi Takiguchi, Atsushi Yuasa, Satoshi Tanimura
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Publication number: 20160273776Abstract: An object is to realize combustion flame which can further reduce the amount of NOx generation. A combustor (14) includes a pilot nozzle (40); a plurality of main nozzles (44) arranged apart from the pilot nozzle (40) in the circumferential direction on the outer peripheral side of the pilot nozzle (40) and configured to perform premix combustion; a combustor basket (34) surrounding the pilot nozzle (40) and each main nozzle (44); an outlet outer ring (50) provided at a tip end of the combustor basket (34); and a combustion liner (36) fitted, at an inner surface thereof, onto the outer periphery of the combustor basket (34) and surrounding the outlet outer ring (50). The outlet outer ring (50) is formed parallel to an inner wall surface (66) of the combustion liner (36).Type: ApplicationFiled: March 19, 2014Publication date: September 22, 2016Inventors: Satoshi TAKIGUCHI, Mitsunori ISONO, Atsushi YUASA, Eisaku ITO, Shigemi MANDAI
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Publication number: 20160252246Abstract: A combustion burner for a boiler includes: an inner cylinder forming a fuel supply passage for supplying the fuel; an outer cylinder disposed so as to surround the inner cylinder and to form an air supply passage between the inner cylinder and the outer cylinder; and a swirler disposed in the air supply passage and configured to swirl the air flowing through the air supply passage. The swirler includes a plurality of blades radially disposed between the inner cylinder and the outer cylinder, the blades extending from an air-supply side toward a combustion-space side of the air supply passage, and each of the plurality of blades has, at least on an inner-cylinder side of the blade, a section with a thickness varied in a burner axial direction, the thickness being smaller at an edge portion on the combustion-space side than at a maximum-thickness section of the blade.Type: ApplicationFiled: March 11, 2014Publication date: September 1, 2016Inventors: Yoshiaki ARAKAWA, Kazuaki HASHIGUCHI, Keiji TAKENO, Atsushi YUASA, Takahiro JOJIMA, Hideta OGAWA, Shogo SAWA
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Publication number: 20150362193Abstract: A combustor of the present invention includes: a pilot burner; a plurality of main burners (36), each of which is provided radially and outwardly along a circumferential direction about the pilot burner, and including a main nozzle (36a) disposed in a main burner cylinder (36A); an extension tube (36B) provided to extend toward a downstream side from the main burner cylinder of each of the main burners, the extension tube having a circular inlet (36Ba) communicating with the main burner cylinder, and an outlet (36Bb) at the downstream side comprising two radial edges (36Bc) parallel to the radial direction and two circumferential edges (36Bd) formed along the circumferential direction so as to connect both ends of the radial edges; an air passage (36E) formed outside of the main burner cylinder; and an inner communication hole (H1).Type: ApplicationFiled: January 10, 2014Publication date: December 17, 2015Inventors: Kei INOUE, Keijiro SAITO, Hikaru KATANO, Sosuke NAKAMURA, Mitsunori ISONO, Atsushi YUASA
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Patent number: 8938969Abstract: A combustor includes: a combustor basket configured to surround a fuel nozzle from an outer circumferential side, and a plurality of connecting members formed in a circumferential direction at intervals to connect a rear end of the combustor basket and a casing and configured to define a flow path through which compressed air introduced into the combustor basket flows. A circulation direction of the compressed air flowing through the flow path is configured to be reversed at a rear end of the combustor basket and the compressed air is introduced into the fuel nozzle. The flow path is partially or entirely inclined in the circumferential direction to blow the compressed air.Type: GrantFiled: January 22, 2014Date of Patent: January 27, 2015Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Atsushi Yuasa, Toshihiko Saito, Kotaro Miyauchi, Keijiro Saito, Satoshi Takiguchi
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Publication number: 20140202161Abstract: A combustor includes: a combustor basket configured to surround a fuel nozzle from an outer circumferential side, and a plurality of connecting members formed in a circumferential direction at intervals to connect a rear end of the combustor basket and a casing and configured to define a flow path through which compressed air introduced into the combustor basket flows. A circulation direction of the compressed air flowing through the flow path is configured to be reversed at a rear end of the combustor basket and the compressed air is introduced into the fuel nozzle. The flow path is partially or entirely inclined in the circumferential direction to blow the compressed air.Type: ApplicationFiled: January 22, 2014Publication date: July 24, 2014Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Atsushi Yuasa, Toshihiko Saito, Kotaro Miyauchi, Keijiro Saito, Satoshi Takiguchi
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Publication number: 20120045725Abstract: Provided is a combustor that is made compact and achieves NOx reduction.Type: ApplicationFiled: August 13, 2009Publication date: February 23, 2012Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Satoshi Takiguchi, Atsushi Yuasa, Satoshi Tanimura
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Publication number: 20100275603Abstract: A combustor 3 of a gas turbine includes an inner premixed gas generator 33 and an outer premixed gas generator 34 that produce combustion flame, an inner cylinder 31 that has therein the inner and outer premixed gas generating units 33 and 34, and a transition piece 32 that connects the inner cylinder 31 to an inlet of a turbine. The outer premixed gas generator 34 is placed surrounding an outer circumference of the inner premixed gas generator 33. The inner premixed gas generator 33 and the outer premixed gas generator 34 are placed with a cylindrical swirler ring 35 interposed therebetween. In the combustor 3, a part of each inner wall surface of premixed gas generator outlets 333 and 334 of the premixed gas generators 33 and 34, which is located outward in a radial direction of the combustor 3, is extended further in an axial direction of the combustion flame than a part of the inner wall surface, which is located inward in the radial direction of the combustor 3.Type: ApplicationFiled: December 25, 2008Publication date: November 4, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Keijiro Saito, Atsushi Yuasa, Satoshi Tanimura
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Patent number: 7673454Abstract: In a combustor, divisional fluid passages of a first group, and divisional fluid passages of a second group are present on an inner peripheral side, and divisional fluid passages are also present on an outer peripheral side, and swirl air flows are gushed from the divisional fluid passages. When the total amount of fuel supplied to the combustor is small as in a speed increasing state or in a low load state, fuel is injected only into the divisional fluid passages of the first group. Since a fuel injection region is limited to a position on the inner peripheral side, particularly, a specific position, the concentration of a fuel gas comprising a mixture of fuel and air is lean, but is higher than a flammability limit concentration, even when the total amount of fuel is small.Type: GrantFiled: January 31, 2007Date of Patent: March 9, 2010Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Keijiro Saito, Satoshi Tanimura, Atsushi Yuasa, Toshihiko Saito
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Publication number: 20070227156Abstract: In a combustor, divisional fluid passages of a first group, and divisional fluid passages of a second group are present on an inner peripheral side, and divisional fluid passages are also present on an outer peripheral side, and swirl air flows are gushed from the divisional fluid passages. When the total amount of fuel supplied to the combustor is small as in a speed increasing state or in a low load state, fuel is injected only into the divisional fluid passages of the first group. Since a fuel injection region is limited to a position on the inner peripheral side, particularly, a specific position, the concentration of a fuel gas comprising a mixture of fuel and air is lean, but is higher than a flammability limit concentration, even when the total amount of fuel is small.Type: ApplicationFiled: January 31, 2007Publication date: October 4, 2007Applicant: Mitsubishi Heavy Industries, Ltd.Inventors: Keijiro Saito, Satoshi Tanimura, Atsushi Yuasa, Toshihiko Saito