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:
Jun. 25, 2013
Filed:
Aug. 07, 2012
William H. Sun, Lisle, IL (US);
Paul G. Carmignani, Naperville, IL (US);
William H. Sun, Lisle, IL (US);
Paul G. Carmignani, Naperville, IL (US);
Fuel Tech, Inc., Warrenville, IL (US);
Abstract
A process and an apparatus enhance urea utilization for selective catalytic reduction (SCR) of NO, by controlled preparation and feed of gasified urea during combustor load variation. The concentration of NOin the combustion gases and a required total gas flow necessary to supply an SCR reactor with NOreducing and carrier gases are determined. Urea is gasified by gasification gases in a thermal gasification reactor. The resulting urea gasification products are mixed with carrier gases to provide an injection grid supply stream. Heating is reduced and flue gas enthalpy is efficiently used by controls utilizing monitoring the temperatures of gases fed to the thermal gasification reactor and of the stream of carrier gases.