Claims
- 1. A method for heating an exhaust gas flow through a duct defined by opposing duct walls comprising the steps of: generating an elongated flame with a fuel and an off-stoichiometric amount of primary combustion air; extending the flame from one duct wall towards the other duct wall; flowing exhaust gas in the form of exhaust gas streams about the flame along paths boundaries of which substantially intersect peripheries of the flame; flowing secondary combustion air transversely to and directly into an upstream portion of the flame, relative to the gas flow through the duct, over substantially the full length of the flame; equalizing the fuel-to-combustion air ratio in an upstream portion and in the downstream portion of the flame relative to the gas flow through the duct to thereby substantially uniformly and completely combust all fuel.
- 2. A method according to claim 1 wherein the step of equalizing comprises the step of biasing relatively more fuel into the upstream portion of the flame than into the downstream portion thereof.
- 3. A method according to claim 1 wherein the step of equalizing comprises the step of biasing relatively more primary combustion air into the downstream portion of the flame than into the upstream portion thereof.
RELATED APPLICATIONS
This is a Division of Application Ser. No. 182,249, filed Aug. 28, 1980, now U.S. Pat. No. 4,375,952, which is a Continuation-in-Part of Ser. No. 073,348 filed Sept. 7, 1979, now U.S. Pat. No. 4,286,945.
US Referenced Citations (6)
Divisions (1)
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Number |
Date |
Country |
Parent |
182249 |
Aug 1980 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
073348 |
Sep 1979 |
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