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:
Jan. 02, 2001
Filed:
Aug. 16, 1999
Shosaku Fujinami, Tokyo, JP;
Kazuo Takano, Tokyo, JP;
Masaaki Irie, Tokyo, JP;
Tetsuhisa Hirose, Tokyo, JP;
Takahiro Oshita, Tokyo, JP;
Ebara Corporation, Tokyo, JP;
Abstract
The present invention relates to a method for treating solid wastes such as refuse-derived fuel or biomass wastes by pyrolysis gasification in a fluidized-bed gasification furnace,and then high-temperature combustion in a melting furnace,A primary combustion in a fluidized-bed,of the gasification furnace is carried out at a temperature of 600±50° C., a secondary combustion in a freeboard,of the gasification furnace is carried out at a temperature of 725±75° C., and a tertiary combustion in the melting furnace,is carried out at a temperature higher than a fusion temperature of ashes by 50 to 100° C. An oxygen ratio (a ratio of an amount of oxygen supplied for combustion to a theoretical amount of oxygen for combustion) in the primary combustion is in the range of 0.1 to 0.3, an oxygen ratio in the secondary combustion is in the range of 0.05 to 0.1, an oxygen ratio in the tertiary combustion is in the range of 0.9 to 1.1, and a total oxygen ratio is about 1.3.