A study on low NO{sub x} combustion in LBG-fueled 1500 C-class gas turbine
- Tohoku Univ., Sendai, Miyagi (Japan). Dept. of Aeronautics and Space Engineering
- Central Research Inst. of Electric Power Industry, Yokosuka, Kanagawa (Japan)
Developing integrated coal gasification combined-cycle systems ensures cost-effective and environmentally sound options for supplying future power generation needs. The reduction of NO{sub x} emissions and increasing the inlet temperature of gas turbines are the most significant issues in gas turbine development in Integrated Coal Gasification Combined Cycle (IGCC) power generation systems. The coal gasified fuel, which is produced in a coal gasifier of an air-blown entrained-flow type has a calorific value as low as 1/10 of natural gas. Furthermore, the fuel gas contains ammonia when a gas cleaning system is a hot type, and ammonia will be converted to nitrogen oxides in the combustion process of a gas turbine. This study is performed in a 1,500 C-class gas turbine combustor firing low-Btu coal-gasified fuel in IGCC systems. An advanced rich-lean combustor of 150-MW class gas turbine was designed to hold stable combustion burning low-Btu gas and to reduce fuel NO{sub x} emissions from the ammonia in the fuel. The main fuel and the combustion air are supplied into a fuel-rich combustion chamber with strong swirl flow and make fuel-rich flame to decompose ammonia into intermediate reactants such as NHi and HCN. The secondary air is mixed with primary combustion gas dilatorily to suppress the oxidation of ammonia reactants in fuel-lean combustion chamber and to promote a reducing process to nitrogen. By testing under atmospheric pressure conditions, the authors have obtained a very significant result through investigating the effect of combustor exit gas temperature on combustion characteristics. Since they have ascertained the excellent performance of the tested combustor through their extensive investigation, they wish to report on the results.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 372186
- Report Number(s):
- CONF-940626-; ISSN 0742-4795; TRN: IM9641%%263
- Journal Information:
- Journal of Engineering for Gas Turbines and Power, Vol. 118, Issue 3; Conference: 39. international gas turbine and aeroengine congress and exposition, The Hague (Netherlands), 13-16 Jun 1994; Other Information: PBD: Jul 1996
- Country of Publication:
- United States
- Language:
- English
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