초록 ▼

In order to burn a fuel of low ignition properties and low contents of volatile gases in steam generators: the combustion air is introduced in three batches at three successive places into the firebox. Preferably, the primary air is introduced at a temperature of at least about 500°, preferably betw

In order to burn a fuel of low ignition properties and low contents of volatile gases in steam generators: the combustion air is introduced in three batches at three successive places into the firebox. Preferably, the primary air is introduced at a temperature of at least about 500°, preferably between 500°and 600°C. so as to effect a pregasification of the fuel. The secondary air is then introduced at a temperature of about 350°to 400°C. to start the combustion of the pregasified fuel and the tertiary air is finally introduced at a temperature of only about 250°to 300°C. in order to complete the combustion. This temperature differentiation of heat ranges then will permit to withdraw theash as a dry discharge.

대표청구항 ▼

A process for operating a firebox with comminuted solid fuel having poor kindling properties and low volatile gas contents, the said process comprising introducing into the firebox the combustion air in at least three separate batches at three successive places as primary, secondary, tertiary, etc.

A process for operating a firebox with comminuted solid fuel having poor kindling properties and low volatile gas contents, the said process comprising introducing into the firebox the combustion air in at least three separate batches at three successive places as primary, secondary, tertiary, etc. air, the primary air having a temperature of about 500°to 600°C. and compacting a relatively minor amount of the total combustion air, the secondary air having a temperature of about 350°to 400°C., and the tertiary air having a temperature of about 250°to 300°C., the fuel being introduced in pulverized form together with the carrier air constituted by the primary air or derived from the secondary or tertiary air, and withdrawing the ash as a dry discharge.