초록

Combustion apparatus of the premix/fuel lean type which employ jet induced circulation to inhibit the formation of atmospheric pollutants.

대표청구항 ▼

Combustion apparatus of the premix/fuel lean type, comprising: a main combustor means having a primary combustion zone therein; premixer means for forming a mixture of fuel and primary air having an equivalence ratio of less than unity and for so introducing jets of said mixture into said main combu

Combustion apparatus of the premix/fuel lean type, comprising: a main combustor means having a primary combustion zone therein; premixer means for forming a mixture of fuel and primary air having an equivalence ratio of less than unity and for so introducing jets of said mixture into said main combustor means at intervals therearound and toward the axial centerline of said main combustor means at the upstream end thereof as to effect recirculation of fluid in said main combustor means at a volume rate exceeding that at which the fuel and primary air are introduced into said main combustor means, whereby the temperature and the concentration of oxygen in said primary combustion zone can be kept at levels that inhibit the formation of NOx; a secondary combustor means downstream of and in fluid communication with said main combustor means; means for supplying fuel to said premixer means and to said secondary combustor means; and means for so controlling the flow of fuel to said secondary combustor means and to said premixer means as to effect a transfer of the combustion process stabilization function to said secondary combustor means under operating conditions below the lean extinction limit of the main combustor means.