METHOD OF COMBUSTION FOR REDUCING THE FORMATION OF NITROGEN OXIDES DURING COMBUSTION AND AN APPARATUS FOR APPLYING THE METHOD

摘要

A method of combustion and an apparatus for reducing the formation of nitrogen oxides during reducing combustion, particular in the flame. In the method, the oxygen-containing gas required for the combustion contains elementary oxygen less than atmospheric air. The gas consists of air and a low-oxygen-content or non-oxygen-containing gas containing reducing agents, preferably of separately cooled flue gas obtained from the reducing combustion space. The apparatus comprises at least one gas flue (6) through which flue gas containing reducing agents from the reducing combustion is passed via a cooler (9) into an air mixer (8) in which it is mixed with the primary air to be introduced into the boiler.