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.

Date of Patent:
Nov. 03, 1987

Filed:

Dec. 26, 1979
Applicant:
Inventors:

Ke-tien Liu, Columbus, OH (US);

Herman Nack, Columbus, OH (US);

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F23D / ;
U.S. Cl.
CPC ...
431-7 ; 122 / ; 432 15 ; 423244 ; 423D / ; 4819 / ; 110347 ;
Abstract

Nitrogen oxide pollutants are substantially reduced and sulfur dioxide minimized in multisolid fluidized beds by staged combustion of the fuel. The lower combustion region is operated at substoichiometric conditions such that NO.sub.x is reduced by carbon and carbon monoxide to nitrogen gas. The upper combustion region is operated at excess oxygen conditions to complete the combustion of char and carbon monoxide. Elevated temperature excursions in the upper region which deter sulfur capture are prevented by recycling cool entrained bed particles therethrough.


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Liu, Ke-tien. (1987). No.sub.x reduction in multisolid fluidized bed combustors (U.S. Patent No. 4704084). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4704084

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