石炭ガス化中カロリー燃料用ガスタービン燃焼器 : 第3報,Fuel NO_x/Thermal NO_x同時低減燃焼技術(熱工学,内燃機関,動力など)

概要

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In order to improve the thermal efficiency of the oxygen-blown IGCC (Integrated Gasification Combined Cycle) and to meet stricter environmental restrictions among cost-effective options, a hot/dry synthetic gas cleanup is one of the most prospective choices. The flame temperature of medium-Btu gasified fuel used in this system is relatively high, so that NO_x formation by nitrogen fixation increases significantly. Additionally, the gasified fuel contains fuel nitrogen in the form of ammonia mostly and it produces nitrogen oxides, the fuel-NO_x in the case of employing the hot/dry synthetic gas cleanup. Low NO_x combustion technology to reduce both fuel-NO_x and thermal-NO_x emissions has been required to protect the environment and ensure low cost operations for all kinds of oxygen-blown IGCC. In this paper, we have demonstrated effectiveness of two-stage combustion and nitrogen injection technique, and also showed useful engineering guidelines for the low-NO_x combustor design of oxygen-blown gasified, medium-Btu fuels.
社団法人日本機械学会の論文
2003-10-25