Developing integrated coal gasification combined-cycle systems ensures cost-effective and environmentally sound options for supplying future power generation needs. The reduction of NOx 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 1500°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 NOx 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 oxidization 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 we have ascertained the excellent performance of the tested combustor through our extensive investigation, we wish to report on the results.
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July 1996
Research Papers
A Study on Low NOx Combustion in LBG-Fueled 1500°C-Class Gas Turbine
T. Nakata,
T. Nakata
Department of Aeronautics and Space Engineering, Tohoku University, Sendai, Miyagi, Japan
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M. Sato,
M. Sato
Central Research Institute of Electric Power Industry, Yokosuka, Kanagawa, Japan
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T. Ninomiya,
T. Ninomiya
Central Research Institute of Electric Power Industry, Yokosuka, Kanagawa, Japan
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T. Hasegawa
T. Hasegawa
Central Research Institute of Electric Power Industry, Yokosuka, Kanagawa, Japan
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T. Nakata
Department of Aeronautics and Space Engineering, Tohoku University, Sendai, Miyagi, Japan
M. Sato
Central Research Institute of Electric Power Industry, Yokosuka, Kanagawa, Japan
T. Ninomiya
Central Research Institute of Electric Power Industry, Yokosuka, Kanagawa, Japan
T. Hasegawa
Central Research Institute of Electric Power Industry, Yokosuka, Kanagawa, Japan
J. Eng. Gas Turbines Power. Jul 1996, 118(3): 534-540 (7 pages)
Published Online: July 1, 1996
Article history
Received:
February 19, 1994
Online:
November 19, 2007
Citation
Nakata, T., Sato, M., Ninomiya, T., and Hasegawa, T. (July 1, 1996). "A Study on Low NOx Combustion in LBG-Fueled 1500°C-Class Gas Turbine." ASME. J. Eng. Gas Turbines Power. July 1996; 118(3): 534–540. https://doi.org/10.1115/1.2816680
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