David L Horan

US Patent:

40896374, May 16, 1978

Filed:

May 20, 1977

Appl. No.:

5/798967

Inventors:

Donald Arthur Smith - Haddam CT
David Joseph Horan - Westfield MA

Assignee:

Combustion Engineering, Inc. - Windsor CT

International Classification:

F23M 908
F23C 518

US Classification:

431183

Abstract:

A fuel admission assembly for a tangentially fired furnace that utilizes oil, gas, or other utility grade fuels. The assembly disclosed has the ability to achieve a positive control of the air flow through a specially designed swirler. Because of this unique feature of its design, this assembly will permit efficient tangential boiler operation at 5% excess air or less over a fuel turndown ratio of at least 3 to 1 on each assembly. At the same time, it will not produce unacceptable levels of noxious emissions such as oxides of nitrogen, carbonaceous soot or sulfur smuts over its full operating range. Finally, it requires no additional fan head (windbox pressure drop).