Pulsated O sub(2)/fuel flame as a new technique for low NO sub(x) emission

A new primary NO sub(x) reduction method is described. It consists in pulsating one or both fluids from a oxy-gas burner by rotary-plug valve or solenoid electrovalve. The parameters to be set are C the constant fraction of the pulsated gas flow-rate, P the amplitude of the pulsated fraction of the...

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Bibliographic Details
Published in:Combustion science and technology 1993-01, Vol.93 (1-6), p.211-222
Main Authors: Charon, O, Jouvaud, D, Genies, B
Format: Article
Language:English
Online Access:Get full text
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Summary:A new primary NO sub(x) reduction method is described. It consists in pulsating one or both fluids from a oxy-gas burner by rotary-plug valve or solenoid electrovalve. The parameters to be set are C the constant fraction of the pulsated gas flow-rate, P the amplitude of the pulsated fraction of the gas flow-rate, O the duration of the maximum flow-rate, F the duration of the minimum flow-rate and Phi the dephasing between the two pulsations when both gases are pulsated. Experiments on 20 kW and 50 kW pilot furnaces have shown that up to 90% NO sub(x) reduction can be achieved without lowering heat transfer when parameters are set as follows (both gases are pulsated): dephasing equal to 1/2, C/P around 0.2 and frequency (1/F+O) as low as possible. Further developments are underway to perform test on a 1 MW pilot furnace before industrial trials.
ISSN:0010-2202