Low NOx emission characteristics of refuse-recovered low BTU gases as fuel for high efficiency gas turbines

This paper discusses the problems of using refuse-recovered low Btu gases as fuel of high-temperature regenerative gas turbines. First, it is briefly described that the system using refuse-recovered fuels has a great possibility of being superior both in energy conservation and in solving refuse disposal problems in urban areas. Next, by taking a fermentation gas of the sewage sludge and a pyrolysis gas of the municipal refuse as examples, it is confirmed that a combustion gas with the high flame temperature required for a high efficiency gas turbine can sufficiently be obtained. Finally, through a case study in which no special condition is assumed, the system using these refuse-recovered low Btu gases whose flame temperatures are low is shown to be excellent in the thermal NOx formation characteristics as compared to that using the conventional fuel with a high calorific value.