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:
Feb. 05, 1991
Filed:
Oct. 11, 1988
Jacob Korenberg, York, PA (US);
Donlee Technologies, Inc., York, PA (US);
Abstract
A combustion apparatus for staged combustion inside the Morison tube of a firetube boiler for lowering the concentration of NO.sub.x in the exhaust gases. Combustion occurs in a first and second stage, the first stage being sub-stoichiometric combustion and the second stage being above-stoichiometric combustion. In two embodiments of the combustion apparatus, the first stage combustion occurs directly adjacent the inlet end of the boiler furnace and the second stage combustion occurs inside the boiler furnace which acts as a combustion apparatus. In other embodiments of the combustion apparatus, both the first and second stage combustion occur inside the boiler furnace which acts as a combustion apparatus. Swirling and/or cyclonic combustion is utilized in the first and second stages of the combustion apparatus. There is provided heat exchange means surrounding and extending substantially throughout the axial length of the combustion chamber, i.e., the boiler furnace, for absorbing heat and cooling the combustion gases therein.