Process for the staged combustion of fuel using oxygen-rich gas and oxygen-depleted gas, useful during phases of oxygen supply cut-off

摘要

Combustion of a fuel using an oxygenated gas in which a fuel jet is injected and two jets of oxygen-rich gas to engender incomplete combustion, followed by injection of an oxygen-depleted gas to complete combustion of residual unburnt fuel. The combustion process entails an injection of fuel and two jets of oxygen-rich gas, the first being injected in contact with the fuel to achieve incomplete combustion, the resulting gases comprising still part of the fuel, then the second jet is injected at a distance I 1 from the fuel jet ; an oxygen-depleted gas is then injected at a distance I 2 from the fuel jet to enter into combustion with the second part of the fuel from the first combustion, with I 2 being greater than I 1. Independent claims are also included for the burner assembly and its uses.