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. 25, 2016
Filed:
Oct. 21, 2011
Hirofumi Okazaki, Mito, JP;
Koji Kuramashi, Kure, JP;
Hideo Okimoto, Kure, JP;
Kenichi Ochi, Kure, JP;
Naoya Imooka, Kure, JP;
Pauli Dernjatin, Helsinki, FI;
Hirofumi Okazaki, Mito, JP;
Koji Kuramashi, Kure, JP;
Hideo Okimoto, Kure, JP;
Kenichi Ochi, Kure, JP;
Naoya Imooka, Kure, JP;
Pauli Dernjatin, Helsinki, FI;
MITSUBISHI HITACHI POWER SYSTEMS, LTD., Yokohama-Shi, JP;
Abstract
A boiler operating method operates a boiler by switching between air combustion mode and oxygen combustion mode when burning fossil fuel with first combustion gas and second combustion gas. The second combustion gas compensates for oxygen deficiency in the first combustion gas. The air combustion mode uses air as the first combustion gas and the second combustion gas while the oxygen combustion mode uses mixed gas of combustion flue gas and oxygen-rich gas as the first combustion gas and the second combustion gas, the combustion flue gas being produced when the fossil fuel is burned. By mixing the oxygen-rich gas in the air in the process of switching between air combustion mode and oxygen combustion mode, the air being the first combustion gas used in the air combustion mode, the boiler operating method can switch between the air combustion mode and oxygen combustion mode while maintaining stable combustion.