POLLUTANT REDUCTION WITH SELECTIVE GAS STACK RECIRCULATION

摘要

POLLUTANT REDUCTION WITH SELECTIVE GAS STACK RECIRCULATION A flame is produced in a combustion chamber with a burner supplied with fuel and less than the amount of air for complete combustion. The remainder of the air required for complete combustion is injected separately. Stack gas containing substantial carbon dioxide is mixed selectively with the gaseous combustion products. By well known reactions the carbon dioxide reacts with carbon in the combustion products to produce carbon monoxide which is later oxidized to carbon dioxide under conditions which do not promote production of noxious nitrogen oxides. The principles of the invention are applicable to a variety of fuel burners.