Process and apparatus for ultra-low pollutant emission combustion.

摘要

A process and apparatus for ultra-low pollutant emission combustion of fossil fuel wherein an elongated cyclonic primary combustion chamber (10) has a cross-sectional area about 4% to about 30% that of an elongated cyclonic secondary combustion chamber (30) and a volume about 1% to about 20% of the combined primary and secondary combustion chamber volume. A first fuel portion of about 1% to about 20% of the total fuel and primary combustion air in an amount selected from about 40% to about 90% and about 140% to about 230% of the stoichiometric requirement for complete combustion of the first fuel portion is introduced into the primary combustion chamber (10). A second fuel portion of about 80% to about 99% of the total fuel ist introduced into the secondary combustion chamber (30) with secondary combustion air in an amount of about 150% to about 260% of the stoichiometric requirement for complete combustion of the fuel. In preferred embodiments cyclonic flow is maintained through the combustor. <IMAGE>