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:
Aug. 30, 2016
Filed:
Mar. 06, 2008
Shuuhei Terushita, Tokyo, JP;
Toshihiko Yamada, Tokyo, JP;
Shuzo Watanabe, Tokyo, JP;
Terutoshi Uchida, Tokyo, JP;
Shuuhei Terushita, Tokyo, JP;
Toshihiko Yamada, Tokyo, JP;
Shuzo Watanabe, Tokyo, JP;
Terutoshi Uchida, Tokyo, JP;
IHI Corporation, Tokyo, JP;
ELECTRIC POWER DEVELOPMENT CO., LTD., Tokyo, JP;
Abstract
Provided are a method and an apparatus of controlling an oxygen supply in an oxyfuel combustion boiler capable of attaining stable oxyfuel combustion even when properties of coal are changed. A boiler-brought-in oxygen density is obtained when coal with a fuel ratio measured by fuel measuring meansis burned stably with oxygen in a boilerso that a relationship between the fuel ratio and/or carbon content of the coal and the boiler-brought-in oxygen density is obtained and inputted in advance into the controller. When the coal is changed to the new kind of coal, a total amount of gases recirculated is regulated such that a boiler-brought-in oxygen density becomes accordance with a fuel ratio and/or a carbon content which is measured in advance for the new kind of coal.