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:
May. 20, 2008
Filed:
Nov. 13, 2003
Roy Payne, Mission Viejo, CA (US);
Wei Zhou, Foothill Ranch, CA (US);
Vitali Victor Lissianski, San Juan Capistrano, CA (US);
Vladimir M. Zamansky, Oceanside, CA (US);
Larry William Swanson, Laguna Hills, CA (US);
Roy Payne, Mission Viejo, CA (US);
Wei Zhou, Foothill Ranch, CA (US);
Vitali Victor Lissianski, San Juan Capistrano, CA (US);
Vladimir M. Zamansky, Oceanside, CA (US);
Larry William Swanson, Laguna Hills, CA (US);
General Electric Company, Schenectady, NY (US);
Abstract
A method of decreasing the concentration of nitrogen oxides in a combustion flue gas in which a nitrogen reducing agent is introduced together with the overfire air to mixes with the products of primary combustion along with the overfire air. The nitrogen agent reduced NOx as it passes through the temperature regime that is optimum for the NOx reduction as overfire air and flue gas mix. The transition from low to high temperature effectively eliminates ammonia slip. Additionally, the nitrogen agent may be mixed with the overfire air stream in such a manner that it is optimally shielded from early mixing with the products of primary combustion, where a portion of the overfire air reacts initially with any residual carbon monoxide (CO) that would otherwise interfere with the NOx reduction chemistry.