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. 06, 1996
Filed:
Oct. 13, 1994
Applicant:
Inventor:
Carl R Bozzuto, Enfield, CT (US);
Assignee:
Combustion Engineering, Inc., Windsor, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F23D / ;
U.S. Cl.
CPC ...
110347 ; 110345 ; 110186 ;
Abstract
A pulverized coal steam generator employing tangential, concentric firing with oxidizing conditions adjacent the furnace walls and using overfire air and low NO.sub.x firing methods is operated at very low excess air levels. This is possible because the unburned carbon in the flyash is measured and the pulverizers are adjusted to control the particles size of the pulverized coal and maintain a desired carbon level. The slagging and corrosion associated with deep staging is overcome by the concentric firing. Overall plant efficiency is obtained while still meeting performance objectives and emissions controls.