Combustion – Combustion products return structure
Patent
1994-01-26
1995-10-17
Dority, Carroll B.
Combustion
Combustion products return structure
431175, F23L 700
Patent
active
054584817
ABSTRACT:
A burner for combusting fuel gas and air in an enclosure includes a block member of non-combustible material, such as ceramic material, having a central opening therethrough. The block member has a plurality of spaced apart recirculation gas passageways paralleled to and spaced from the central opening, each of the recirculation gas passageways having an injection passageway communicating with the block member central opening. A fuel gas jet is positioned within each of the recirculation gas passageways for injecting fuel gas into the injection passageways to cause the injected fuel gas by Venturi action, to draw furnace gas from the cool fringes of the combustion zone through the recirculation gas passageways for passage back into the central opening after local combustion wherein modified air and fuel gas are thoroughly mixed and cooled for combustion within the enclosure. This recirculation system serves to reduce the temperature and oxygen content of the local combustion process to thereby reduce NO.sub.x production.
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Allen Richard C.
Smith James L.
Surbey David J.
Witwer Alan D.
Dority Carroll B.
Zeeco Inc.
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