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:
Oct. 19, 2010
Filed:
Nov. 10, 2009
M. Linda Lin, Naperville, IL (US);
William H. Sun, Lisle, IL (US);
John M. Boyle, Oak Park, IL (US);
Penelope Stamatakis, Montgomery, IL (US);
M. Linda Lin, Naperville, IL (US);
William H. Sun, Lisle, IL (US);
John M. Boyle, Oak Park, IL (US);
Penelope Stamatakis, Montgomery, IL (US);
Fuel Tech, Inc., Warrenville, IL (US);
Abstract
Disclosed are a process and apparatus for selective catalytic reduction of NO. The process is enabled by bypassing a heat exchanger section, such as an economizer, of the boiler in advance of an SCR unit at low load conditions to enable NOreduction even at low loads using urea instead of ammonia. In a preferred form, under high load conditions, the bypass can be almost fully closed and the economizer can be operated normally without excessively cooling the combustion gases, using only a portion of bypassed gases which are hot enough to decompose the urea into its active components including ammonia.