Abstract: A flue gas recirculation burner providing reduced No.sub.x emissions uses a cylindrical tangential mixer to separately receive combustion air and flue gas through axial inlets. The mixed air and gas pass through a vaned diffuser which continues the tangential flow pattern, and thereafter fuel is introduced tangentially and combustion occurs.
Type:
Grant
Filed:
June 22, 1995
Date of Patent:
October 8, 1996
Assignee:
Burnham Properties Corporation
Inventors:
Michael W. Gordon, Mikhail Zlatkin, Scott R. Miller
Abstract: An atmospheric reticulated ceramic foam burner which is retrofittable into existing residential heat exchanger designs has been developed to reduce NO.sub.x and CO emissions. It is operated in a blue flame or substantially radiant mode. The ceramic foam tile used is a three dimensional, web-like structure composed of ceramic struts and voids (or pores) which is permeable and rigid and can withstand the high temperatures found in domestic burners. The foam tile is positioned over a manifold, and is the outlet for the manifold. The manifold inlet is a venturi so that incoming gas is mixed with air in the correct range of proportions before passing through the foam. The pressures used, relative to tile porosity, are such that the gas-air mixture does not burn until it has passed all the way through the foam tile, resulting in a flame above the tile. Additional quantities of (secondary) air can be introduced around the burner to mix and burnout the products of combustion.
Type:
Grant
Filed:
October 21, 1994
Date of Patent:
April 30, 1996
Assignee:
Burnham Properties Corporation
Inventors:
Michael W. Gordon, Mikhail Zlatkin, Kurt A. Bauer, Kurt D. Oswald