Patents by Inventor Toyoaki Miyazaki
Toyoaki Miyazaki 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: 9758880Abstract: A method for controlling water chemistry in a power generation plant including a low-pressure feedwater heater (18), a deaerator (19), and a high-pressure feedwater heater (20) disposed sequentially along a feedwater pipe (16) from a condenser (15) to a steam generator or a boiler (11) to control the chemistry of feedwater guided to the steam generator or the boiler includes the steps of: injecting an oxidant through an oxidant injection line (31) into feedwater flowing through the feedwater pipe disposed downstream of the condenser in such a way that a dissolved oxygen concentration in the feedwater ranges from 3 to 100 ppb while the feedwater is maintained to be neutral to form an oxide film on surfaces of the feedwater pipe, the low-pressure feedwater heater, the deaerator, the high-pressure feedwater heater, and other structural members that come into contact with the feedwater; and injecting a deoxidant through a deoxidant injection line (35) into the feedwater flowing through the feedwater pipe disposedType: GrantFiled: March 9, 2010Date of Patent: September 12, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Toyoaki Miyazaki, Masato Okamura, Osamu Shibasaki, Hajime Hirasawa
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Patent number: 9221978Abstract: A corrosion-resistant member has a composite titanium oxide film for reducing corrosion deposited on a surface of a construction material, where the composite titanium oxide film is represented by a molecular formula MTiO3 in which M is a transition element, and the corrosion-resistant member is preliminarily manufactured by depositing titanium oxide on the surface of the construction material, and the titanium oxide is subsequently or simultaneously subjected to high temperature treatment under existence of an ion of the transition metal.Type: GrantFiled: January 29, 2014Date of Patent: December 29, 2015Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Masato Okamura, Osamu Shibasaki, Seiji Yamamoto, Toyoaki Miyazaki
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Patent number: 9165689Abstract: The present invention provides an operation method of a plant which has a low-pressure feed water heater, a deaerator and a high-pressure feed water heater sequentially arranged in a feed water pipe reaching a steam generator from a condenser, and leads high-temperature feed water to the steam generator, wherein an oxidant is injected onto a surface of a structural material from an oxidant injection line in order to form a film that suppresses an elution of an element constituting the structural material such as the feed water pipe, the low-pressure feed water heater, the deaerator and the high-pressure feed water heater, which come in contact with the high-temperature feed water, and a corrosion suppression substance is further introduced from a corrosion suppression substance introduction line in order to deposit the corrosion suppression substance on a surface of the structural material in which corrosion accelerated by a flow of the feed water occurs.Type: GrantFiled: February 8, 2010Date of Patent: October 20, 2015Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Osamu Shibasaki, Masato Okamura, Seiji Yamamoto, Toyoaki Miyazaki, Kenji Yamazaki, Tetsuji Kaneko, Minoru Kobayashi
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Patent number: 8877335Abstract: A corrosion-resistant member has a composite titanium oxide film for reducing corrosion deposited on a surface of a construction material, where the composite titanium oxide film is represented by a molecular formula MTiO3 in which M is a transition element, and the corrosion-resistant member is preliminarily manufactured by depositing titanium oxide on the surface of the construction material, and the titanium oxide is subsequently or simultaneously subjected to high temperature treatment under existence of an ion of the transition metal.Type: GrantFiled: March 26, 2010Date of Patent: November 4, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Masato Okamura, Osamu Shibasaki, Seiji Yamamoto, Toyoaki Miyazaki
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Patent number: 8859038Abstract: Provided is a method for monitoring corrosion in a power plant, including: forming a film with a composition of M1FeO3 (M1 is a trivalent or tetravalent metal) or M2Fe2O4 (M2 is a divalent metal) on the inner wall surface of an apparatus of the power plant; and maintaining the film stably by controlling the amount of introduction of oxygen into the apparatus commensurate with a temperature in the apparatus.Type: GrantFiled: August 29, 2011Date of Patent: October 14, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Osamu Shibasaki, Masato Okamura, Koji Negishi, Seiji Yamamoto, Toyoaki Miyazaki
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Publication number: 20140170325Abstract: A corrosion-resistant member has a composite titanium oxide film for reducing corrosion deposited on a surface of a construction material, where the composite titanium oxide film is represented by a molecular formula MTiO3 in which M is a transition element, and the corrosion-resistant member is preliminarily manufactured by depositing titanium oxide on the surface of the construction material, and the titanium oxide is subsequently or simultaneously subjected to high temperature treatment under existence of an ion of the transition metal.Type: ApplicationFiled: January 29, 2014Publication date: June 19, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Masato OKAMURA, Osamu Shibasaki, Seiji Yamamoto, Toyoaki Miyazaki
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Publication number: 20120064242Abstract: According to one embodiment, there is provided a method for monitoring corrosion in a power plant, including: forming a film with a composition of M1FeO3 (M1: trivalent or tetravalent metal) or M2Fe2O4 (M2: divalent metal) on an inner wall surface of each of apparatuses of the power plant; and maintaining the film stably by controlling an amount of introduction of oxygen into each of apparatuses commensurate with a temperature in each of the apparatuses.Type: ApplicationFiled: August 29, 2011Publication date: March 15, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Osamu SHIBASAKI, Masato Okamura, Koji Negishi, Seiji Yamamoto, Toyoaki Miyazaki
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Publication number: 20120039429Abstract: The present invention provides an operation method of a plant which has a low-pressure feed water heater, a deaerator and a high-pressure feed water heater sequentially arranged in a feed water pipe reaching a steam generator from a condenser, and leads high-temperature feed water to the steam generator, wherein an oxidant is injected onto a surface of a structural material from an oxidant injection line in order to form a film that suppresses an elution of an element constituting the structural material such as the feed water pipe, the low-pressure feed water heater, the deaerator and the high-pressure feed water heater, which come in contact with the high-temperature feed water, and a corrosion suppression substance is further introduced from a corrosion suppression substance introduction line in order to deposit the corrosion suppression substance on a surface of the structural material in which corrosion accelerated by a flow of the feed water occurs.Type: ApplicationFiled: February 8, 2010Publication date: February 16, 2012Applicant: Kabushiki Kaisha ToshibaInventors: Osamu Shibasaki, Masato Okamura, Seiji Yamamoto, Toyoaki Miyazaki, Kenji Yamazaki, Tetsuji Kaneko, Minoru Kobayashi
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Publication number: 20120028038Abstract: A corrosion-resistant member has a composite titanium oxide film for reducing corrosion deposited on a surface of a construction material, where the composite titanium oxide film is represented by a molecular formula MTiO3 in which M is a transition element, and the corrosion-resistant member is preliminarily manufactured by depositing titanium oxide on the surface of the construction material, and the titanium oxide is subsequently or simultaneously subjected to high temperature treatment under existence of an ion of the transition metal.Type: ApplicationFiled: March 26, 2010Publication date: February 2, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Masato Okamura, Osamu Shibasaki, Seiji Yamamoto, Toyoaki Miyazaki
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Publication number: 20110318223Abstract: A method for controlling water chemistry in a power generation plant including a low-pressure feedwater heater (18), a deaerator (19), and a high-pressure feedwater heater (20) disposed sequentially along a feedwater pipe (16) from a condenser (15) to a steam generator or a boiler (11) to control the chemistry of feedwater guided to the steam generator or the boiler includes the steps of: injecting an oxidant through an oxidant injection line (31) into feedwater flowing through the feedwater pipe disposed downstream of the condenser in such a way that a dissolved oxygen concentration in the feedwater ranges from 3 to 100 ppb while the feedwater is maintained to be neutral to form an oxide film on surfaces of the feedwater pipe, the low-pressure feedwater heater, the deaerator, the high-pressure feedwater heater, and other structural members that come into contact with the feedwater; and injecting a deoxidant through a deoxidant injection line (35) into the feedwater flowing through the feedwater pipe disposedType: ApplicationFiled: March 9, 2010Publication date: December 29, 2011Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Toyoaki Miyazaki, Masato Okamura, Osamu Shibasaki, Hajime Hirasawa