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. 02, 2010
Filed:
Jul. 24, 2009
Gilbert Otto Kraemer, Greer, SC (US);
Garth Curtis Frederick, Greenville, SC (US);
Gilbert Otto Kraemer, Greer, SC (US);
Garth Curtis Frederick, Greenville, SC (US);
General Electric Company, Schnectady, NY (US);
Abstract
A method and system for reducing the amount of nitrogen oxides (NO) in a combustion gas waste stream by (1) analyzing the waste stream to determine the amount of NO; (2) determining the stoichiometric amount of ammonia required to reduce the NOconcentration down to a required level or less; (3) determining the flow rate profile of NOcomponents across the combustion gas waste stream upstream of an ammonia injection grid; (4) selecting specific locations within the ammonia injection grid to activate ammonia valves; (5) injecting controlled amounts of ammonia vapor into the gas stream at grid locations corresponding to the location of NOin the gas stream; and (6) treating the gas stream using a selective catalytic reduction unit to reduce the amount of NOdown to acceptable levels.