초록 ▼

An apparatus and method for ultra-low pollutant emission combustion of fossil fuel wherein an elongated cyclonic primary combustion chamber has a cross-sectional area about 4 to about 30 percent that of an elongated cyclonic secondary combustion chamber and a volume about 1 to about 20 percent the c

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

대표청구항 ▼

The method for ultra-low pollutant emission combustion of fossil fuel, the steps comprising: introducing into a primary combustion chamber a first fuel portion of about 1 percent to about 20 percent of a total fuel to be combusted; introducing primary combustion air into said primary combustion cham

The method for ultra-low pollutant emission combustion of fossil fuel, the steps comprising: introducing into a primary combustion chamber a first fuel portion of about 1 percent to about 20 percent of a total fuel to be combusted; introducing primary combustion air into said primary combustion chamber in an amount selected from one of a first range of about 40 percent to about 90 percent of a first stoichiometric requirement for complete combustion of said first fuel portion and a second range of about 140 percent to about 230 percent of the first stoichiometric requirement for complete combustion of said first fuel portion; combusting said first fuel portion with said primary combustion air in said primary combustion chamber at a temperature about 2000°F. to about 2700°F. producing initial combustion products; passing said initial combustion products into a secondary combustion chamber; introducing into said secondary combustion chamber a second fuel portion of about 80 percent to about 99 percent of the total fuel to be combusted; introducing secondary combustion air into said secondary combustion chamber in an amount of about 150 percent to about 260 percent of a second stoichiometric requirement for complete combustion of said second fuel portion; combusting said second fuel portion and any remaining fuel in said initial combustion products with said secondary combustion air in said secondary combustion chamber at a temperature about 1700°F. to about 2600°F. producing final combustion products; passing said final combustion products into a dilution chamber; introducing dilution air into said dilution chamber producing ultra-low pollutant emission vitiated air at a temperature about 100°F. to about 2500°F.; and discharging said ultra-low pollutant emission vitiated air from said dilution chamber.