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. 04, 1991
Filed:
Oct. 31, 1990
Todd D Hellewell, North Granby, CT (US);
John Grusha, Windsor, CT (US);
Michael S McCartney, Bloomfield, CT (US);
Combustion Engineering, Inc., Windsor, CT (US);
Abstract
A clustered concentric tangential firing system (12) particularly suited for use in fossil fuel-fired furnaces (10) and a method of operating such furnaces (10) equipped with a clustered concentric tangential firing system (12). The clustered concentric tangential firing system (12) includes a windbox (20), a first cluster of fuel nozzles (38,40) mounted in the windbox (20) and operative for injecting clustered fuel into the furnace (10) so as to create a first fuel-rich zone therewithin, a second cluster of fuel nozzles (68,70) mounted in the windbox (20) and operative for injecting clustered fuel into the furnace (10) so as to create a second fuel-rich zone therewithin, an offset air nozzle (56) mounted in the windbox (20) and operative for injecting offset air into the furnace (10) such that the offset air is directed away from the clustered fuel injected into the furnace (10) and towards the walls of the furnace (10), a close coupled overfire air nozzle (78) mounted in the windbox ( 20) and operative for injecting close coupled overfire air into the furnace (10), and a separated overfire air nozzle (90) mounted in the window (20) and operative for injecting separated overfire air into the furnace (10).