Sonic injection furnace
AssigneesVerallia France, Saint-Gobain Glass France
InventorsFrédéric Hayau, Laurent Garnier
Life of this patent
Estimating the term…
Abstract
A low-NOx end-fired furnace for melting glass equipped with an overhead burner includes an inlet duct for oxidizer, including 15% to 30% of oxygen, in its upstream wall, a duct for receiving the combustion flue gases in its upstream wall, and a sonic injection system including at least one injector for injecting a jet of a gas at a speed at least equal to 80% of the speed of sound, referred to as a sonic injector, opening into the upstream wall or opening into the duct for receiving the combustion flue gases, the sonic injector injecting its gas counter-current to the stream of the combustion flue gases that are heading toward the duct for receiving the combustion flue gases.
Claims15
A process for preparing molten glass comprising:
- melting glass in an end-fired furnace, the end-fired furnace equipped with (i) an overhead burner comprising an inlet duct for oxidizer, comprising 15% to 30% of oxygen, in an upstream wall of the end-fired furnace, (ii) a duct for receiving combustion flue gases, the duct opening into the upstream wall, and (iii) a sonic injection system comprising at least one sonic injector opening into the upstream wall or opening into the duct for receiving the combustion flue gases, and
- injecting by said at least one injector a jet of a gas at a speed at least equal to 80% of the speed of sound, said at least one sonic injector injecting the jet of gas so that the jet of gas is counter-current to a stream of the combustion flue gases that are heading toward the duct for receiving the combustion flue gases.
Dependencies are inferred from the claim text.