Heating – Heat generator heats gas or liquid material in a flow structure – Material heated by mixing with combustion products of generator
Patent
1988-03-25
1991-03-26
Yuen, Henry C.
Heating
Heat generator heats gas or liquid material in a flow structure
Material heated by mixing with combustion products of generator
432 72, 110188, 110204, 431284, F24H 100
Patent
active
050024841
ABSTRACT:
A method and system for flue gas recirculation is disclosed which will minimize NOx production from hydrocarbon combustion. In the present invention a furnace having an oxygen-bearing primary source of combustion air, a mixing chamber, a combustion chamber in downstream communication with the mixing chamber and an exhaust section downstream of the combustion chamber is provided with a flue gas recirculation line. The recirculation line establishes communication between the exhaust section and the mixing chamber for the return of combustion products as a secondary source of combustion air which is relatively lean in oxygen and is combined with the primary source of combustion air in the mixing chamber. The ratio of flow rates for the primary and secondary sources of combustion air is controlled by a signal generated by a sensor which senses the oxygen concentration in the mixing chamber.
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Hutchinson Daniel H.
Lofton Ruth E.
Robinson Dale E.
Shell Western E&P Inc.
Smith Mark A.
Yuen Henry C.
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