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. 30, 1999
Filed:
Sep. 26, 1997
Louis C Philippe, Versailles, FR;
Eric L Duchateau, Gieres, FR;
David R Scheeff, Marietta, GA (US);
Arie Verloop, Kirkland, WA (US);
Edward C Dye, Bothell, WA (US);
Air Liquide America Corporation, Houston, TX (US);
American Air Liquide, Inc., Walnut Creek, CA (US);
l'Air Liquide, Societe Anonyme Pour l'Etude et, l'Exploitation des, , US;
Jansen Combustion and Boiler Technologies, Inc., Woodinville, WA (US);
Abstract
Methods of increasing the throughput of recovery boilers equipped with at least two levels of injection of air, the methods improving the thermal efficiency of the boiler with oxygen enrichment of the air in at least one level of the combustion air system, at or above the secondary air level. In one method, a black liquor recover boiler having two levels of air injection is retrofitted with a third level of oxidant injection below or at the same level as the original secondary air, and oxygen enrichment is applied to at least the original secondary air stream and the third level air stream. A preferred method is for the third level to be placed at or close to the same level as the black liquor injector ports.