The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 20, 2015
Filed:
Feb. 08, 2010
Osamu Shibasaki, Yokohama, JP;
Masato Okamura, Yokohama, JP;
Seiji Yamamoto, Setagaya-Ku, JP;
Toyoaki Miyazaki, Ota-Ku, JP;
Kenji Yamazaki, Yokohama, JP;
Tetsuji Kaneko, Yokohama, JP;
Minoru Kobayashi, Yokohama, JP;
Osamu Shibasaki, Yokohama, JP;
Masato Okamura, Yokohama, JP;
Seiji Yamamoto, Setagaya-Ku, JP;
Toyoaki Miyazaki, Ota-Ku, JP;
Kenji Yamazaki, Yokohama, JP;
Tetsuji Kaneko, Yokohama, JP;
Minoru Kobayashi, Yokohama, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Abstract
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.