Abstract
The "integrated coal gasification combined cycle system" (IGCC) requires the development of a high temperature, gas turbine combustor using coal-derived, low-Btu gaseous fuel, which has high thermal efficiency and low NOx emission. The authors of this paper have developed a 150 MW, 1500°C-class gas turbine combustor which adopts an advanced two-staged combustion technology designed mainly for achieving low NOx emissions and stable combustion. Under high-pressurized conditions, we have successfully reduced NOx emissions when fuel contains ammonia of about 1000 ppm, and have maintained flame stability. Moreover, we have optimized many design guidelines by clarifying the effect of pressure on combustion characteristics. This paper describes in detail the effects of pressure on the characteristics of the advanced, two-staged combustion technology for use in a gas turbine combustor in IGCC.
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