石炭ガス化中カロリー燃料用ガスタービン燃焼器 : 第1報,窒素噴射による低NO_x燃焼法(熱工学,内燃機関,動力など)

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The flame temperature of oxygen-blown medium-Btu gasified coal fuel is higher and so NO_x production from nitrogen fixation is expected to increase significantly. We have started to develop low NO_x and stable combustion technology using medium-Btu gasified coal fuel. In this paper, based on the fundamental combustion tests using the small diffusion burner, we have through out the new combustion technique which injects nitrogen directly into the high temperature region in the combustor for low NO_x and stable combustion. A gas turbine combustor with a swirling nitrogen injection function designed with new combustion technique was constructed and the performance of this combustor was evaluated under atmospheric pressure conditions and operational conditions. From the test results, it is confirmed that : (1) This new combustion technique with nitrogen direct injection results in a significant reduction in NO_x production from nitrogen fixation, 8 ppm or less (corrected at 16% O_2) in the gas turbine operational conditions for IGCC ; and (2) CO emission concentration decreased to a significant level, as low as 10 ppm, under operational conditions, or combustion efficiency was almost always 100%. From the above results, this combustor has an excellent performance under the operational conditions in IGCC, and bright prospects of low NO_x and stable combustion technology of the medium calorific fuel are obtained.
社団法人日本機械学会の論文
2003-06-25

石炭ガス化中カロリー燃料用ガスタービン燃焼器 : 第1報,窒素噴射による低NO_x燃焼法(熱工学,内燃機関,動力など)

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