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:
Nov. 09, 1999
Filed:
Oct. 22, 1997
Hiroyuki Fujimura, Tokyo, JP;
Yoshio Hirayama, Zushi, JP;
Shosaku Fujinami, Tokyo, JP;
Kazuo Takano, Tokyo, JP;
Masaaki Irie, Tokyo, JP;
Tetsuhisa Hirose, Tokyo, JP;
Shuichi Nagato, Yokohama, JP;
Takahiro Oshita, Yokohama, JP;
Toshio Fukuda, Yokohama, JP;
Ebara Corporation, Tokyo, JP;
Ube Industries, Lt., Ube, JP;
Abstract
A method and apparatus for treating wastes by two-stage gasification recovers metals or ash content in the wastes in such a state that they can be recycled, and gases containing carbon monoxide (CO) and hydrogen gas (H.sub.2) for use as synthesis gas for ammonia (NH.sub.3) or production of hydrogen gas. The wastes are gasified in a fluidized-bed reactor at a low temperature. Then, gaseous material and char produced in the fluidized-bed reactor are introduced into a high-temperature combustor, and gasified at a high temperature and ash content is converted into molten slag. After water scrubbing and a CO conversion reaction, the gas is separated into H.sub.2 and residual gas. The residual gas is then supplied to the fluidized-bed reactor as a fluidizing gas.