COMBUSTION OF PULVERIZED COAL

摘要

PURPOSE:To control low NOx burning without generating clinker trouble, by making mixing of combustion air with fuel favorable along with cooling of a furnace wall by blowing substantially the combustion air through the whole circumference of the furnace wall, in a flame forming sphere in the vicinity of a fixing part of a burner. CONSTITUTION:A device is so constituted that it is possible to mix air into a flame homogeneously along with cooling of a furnace wall 2, by so constituting that a pulverized coal burner 1 is fixed to a combustion furnace, a cooling air blowing nozzle 5 and a two-stage combustion air blowing hole 6 are provided in the vicinity of a fixing part of the burner 1 of the furnace wall 2 formed of a refractory and either the combustion air or a mixture of the combustion air with exhaust gas is blown substantially through the whole circumference of the furnace wall 2.