Patent ID: 8714969

Claim:
A method of fuel combustion, comprising the step of injecting a jet of fuel and at least two jets of oxidizer from a single and same furnace wall of a glass or reheat furnace containing a charge, the first jet of oxidizer, called the primary jet, being injected so as to be in contact with the jet of fuel and to generate a first incomplete combustion, the gases originating from this first combustion still comprising at least a portion of the fuel, and the second jet of oxidizer being injected at a distance from the jet of fuel in such a way as to combust with the portion of the fuel present in the gases originating from the first combustion, the fuel being a gas or a liquid, the primary jet of oxidizer being divided into two primary jets: a) a first primary jet of oxidizer, called a central primary jet, is injected from an inner tube in a center of the jet of fuel along an axis of the jet of fuel, the fuel being injected from an outer tube concentrically surrounding the inner tube; and b) a second primary jet of oxidizer, called a sheathing primary jet, injected coaxially around the jet of fuel, wherein the primary jet of oxidizer representing between 2% and 50% of a total quantity of oxidizer combusted and an injection velocity of the second jet of oxidizer is greater than an injection velocity of the sheathing primary jet of oxidizer.