Combustion method for simultaneous control of nitrogen oxides and products of incomplete combustion

A method for combusting material with controlled generation of both nitrogen oxides and products of incomplete combustion comprising:

• (A) combusting material in a first combustion zone to produce gaseous exhaust containing products of incomplete combustion and products of complete combustion;
• (B) passing the gaseous exhaust from the first combustion zone into a second combustion zone having a width and an axial direction;
• (C) injecting through a lance with an orientation substantially parallel to said axial direction at least one stream of oxidant, without fuel, having a diameter less than 1/100 of the width of the second combustion zone and having an oxygen concentration of at least 30 percent into the second combustion zone at a high velocity of at least 300 feet per second;
• (D) aspirating products of incomplete combustion into the high velocity oxidant;
• (E) combusting products of incomplete combustion aspirated into the high velocity oxidant with high velocity oxidant within the second combustion zone to carry out a stable combustion by the mixing of the aspirated products of incomplete combustion with the high velocity oxidant;
• and
• (F) spreading out the combustion reaction by aspiration of products of complete combustion into the oxidant, said products of complete combustion also serving as a heat sink, to inhibit NO.sub.x formation.