Kabushiki Kaisha Toshiba

Subaru Corporation

Toshiba Energy Systems & Solutions Corporation

Osamu Shibasaki

Masato Okamura

Seiji Yamamoto

Koji Negishi

Hajime Hirasawa

Toyoaki Miyazaki

Kenji Yamazaki

Tetsuji Kaneko

Hiroyuki Arai

Tetsuo Oosato

Satoshi Saito

Shinji Murai

Tatsuo Nakahata

Minoru Kobayashi

Yasuhiro Kato

Takehiko Muramatsu

Shinya Matsuo

Ryohei Ono

Koshito Fujita

Daigo Muraoka

Yusuke Handa

Hirotsugu Takazawa

Yoshihiko Kondo

Yutaka Uruma

Kazuo Murakami

Hidehiro Urata

Hiromichi Koga

Ryosuke Shibata

Hayato Morigaki

Yusuke Horayama

Takahiro Hara

According to one embodiment, a gas processing equipment includes an oxygen removerthat removes oxygen contained in exhaust gas G, and a gas processing devicethat processes pretreated exhaust gas G (P), from which the oxygen has been removed by the oxygen remover, with a carbon dioxide absorbent solvent S as a treatment agent.

Gas processing equipment and gas processing method, and carbon dioxide capture system and carbon dioxide capture method

According to one implementation, a blast treatment method includes: setting a blast treatment condition for a composite material to make a degree of activation on the surface of the composite material within an appropriate range, based on reference information; and manufacturing a blast treated product by the blast treatment of the composite material under the blast treatment condition set to make the degree of the activation within the appropriate range. The reference information shows a relation between a strain amount of a test piece caused by blast treatment under a predetermined blast treatment condition and a degree of activation on a surface of a sample of a composite material by blast treatment, for activating the surface of the sample before painting or bonding, under the predetermined blast treatment condition.

Blast treatment device and blast treatment method

A chemical solution injection systemof an embodiment includes: a chemical solution reservoirthat stores a chemical solution containing a depositing substance to deposit to a member in contact with cooling water for absorbing heat in a plant; a pipethrough which the chemical solution passes; a first heat exchanger and a second heat exchanger that exchange heat between the cooling water and the chemical solution; a cooling water pipewhich connects the heat exchangers in series and in which the cooling water passes; and a pumpthat conveys the chemical solution. The temperature of the chemical solution in the chemical solution reservoiris lower than that of the cooling water. The pipesequentially connects the chemical solution reservoir, the first heat exchanger, the second heat exchanger and the plant. The cooling water guided from the inside of the plant passes through the second heat exchanger and subsequently passes through the first heat exchanger. The chemical solution passes through the first heat exchanger and subsequently passes through the second heat exchanger.

Chemical solution injection system and chemical solution injection method

In a plant including a system which is provided with a steam generator, a turbine, a condenserand a heaterand in which non-deaerated water circulates, and a pipe, the steam generator, the heaterandof the system which comes into contact with the non-deaerated water is deposited with a protective substance.

Method for suppressing corrosion in plant and plant

The present invention provides a corrosion-resistant structure for a high-temperature water system comprising: a structural material; and a corrosion-resistant filmformed from a substance containing at least one of La and Y deposited on a surface in a side that comes in contact with a cooling water, of the structural materialwhich constitutes the high-temperature water system that passes a cooling waterof high temperature therein. Due to above construction, there can be provided the corrosion-resistant structure and a corrosion-preventing method capable of operating a plant without conducting a water chemistry control of cooling water by injecting chemicals.

Corrosion-resistant structure for high-temperature water system and corrosion-preventing method thereof

A photocatalyst injection system including: a reactor primary system coolant collection section collecting a reactor primary system coolant containing a noble metal or noble metal ion from a reactor primary system; a photocatalyst addition section adding a photocatalyst to the collected reactor primary system coolant; an ultraviolet irradiation section irradiating, with ultraviolet rays, the coolant to which the photocatalyst has been added for producing, in the coolant, a noble metal-carrying photocatalyst in which the noble metal is carried on a surface of the photocatalyst; and a noble metal-carrying photocatalyst injection section injecting the coolant containing the noble metal-carrying photocatalyst into the reactor primary system.

Photocatalyst injection method and photocatalyst injection system

A method for controlling water chemistry in a power generation plant including a low-pressure feedwater heater (), a deaerator (), and a high-pressure feedwater heater () disposed sequentially along a feedwater pipe () from a condenser () to a steam generator or a boiler () 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 () 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 () into the feedwater flowing through the feedwater pipe disposed downstream of the deaerator in such a way that the dissolved oxygen concentration in the feedwater flowing into the steam generator or the boiler lowers to 5 ppb or lower.

Method and system for controlling water chemistry in power generation plant

A method for injecting a corrosion inhibitor injecting an oxidant and an anticorrosive agent-pH adjusting agent complex including an anticorrosive agent and a pH adjusting agent adsorbed on a surface of the anticorrosive agent into high temperature water in contact with a surface of a metal structural material and irradiating the high temperature water with a radioactive ray or an ultraviolet ray, wherein the anticorrosive agent of the anticorrosive agent-pH adjusting agent complex has, on the surface of the anticorrosive agent, an active site where the pH adjusting agent reacts with the oxidant, and the pH adjusting agent present on the surface of the anticorrosive agent of the anticorrosive agent-pH adjusting agent complex and/or in the high temperature water is oxidized with the oxidant by the irradiation with the radioactive ray or the ultraviolet ray to change pH adjusting ability of the pH adjusting agent and shift a pH of the high temperature water to a neutral side, and thereby deposition of the anticorrosive agentto the metal structural materialis accelerated.

Corrosion inhibitor injecting method

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 MTiOin 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.

Corrosion-resistant member and method of manufacturing the same

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.

Plant operation method and plant operation system

Provided is a method for monitoring corrosion in a power plant, including: forming a film with a composition of M1FeO(M1 is a trivalent or tetravalent metal) or M2FeO(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.

Method for monitoring corrosion protection in power plant

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Yokohama, Japan

Osamu Shibasaki