Afterburning process of products from incomplete combustion in a combustion chamber and a tuyere for making the same

摘要

The invention relates to a method and an impulse current controlled fuel/oxygen lance for the after-burning of products from incomplete combustion. According to the invention, oxygen, introduced into the mixing chamber (8) of the fuel/oxygen lance as oxidising agent, is heated to at least 560 C, by the combustion reaction products from combustion of fuel in the mixing chamber (8) and injected into the combustion zone at a speed of at least Mach 0.8. The disclosed thermal jet combustion process guarantees substantially improved heat transfer relationships in the after-burning of products of incomplete combustion in the combustion zone, by means of an impulse current controlled oxygen input matching the current process conditions with a low specific oxygen consumption.