METHOD AND DEVICE FOR BURNING FUEL OF LOW VAPORIZABILITY AND INFLAMMABILITY TO PICK OUT DRY ASH

摘要

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 DEG , preferably between 500 DEG and 600 DEG C. so as to effect a pregasification of the fuel. The secondary air is then introduced at a temperature of about 350 DEG to 400 DEG C. to start the combustion of the pregasified fuel and the tertiary air is finally introduced at a temperature of only about 250 DEG to 300 DEG C. in order to complete the combustion. This temperature differentiation of heat ranges then will permit to withdraw theash as a dry discharge.