L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des

American Air Liquide, Inc.

L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

L'air Liquide, Societe Anonyme a Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude

Laurent Rio

Thierry Legiret

Harley A Borders

Remi Tsiava

Louis C Philippe

Patrick Recourt

Pierre Bodelin

Kenneth A Mulderink

Bernard Dubi

Bernard Labegorre

Lahcen Ougarane

Robert Plessier

Jean-Christophe Fave

Lahoen Ougarane

To reduce the overall size of and to simplify the supply for three-tube burners, and to allow easier interchangeability with two-tube burners, the burner (Br) comprises an inlet ( ) for a fuel and a fuel feed tube ( ) connected to this fuel inlet, an inlet ( ) for an oxidizer and two oxidizer feed tubes ( ) connected to this oxidizer inlet, and a control valve ( ) for controlling the distribution of the oxidizer between the two oxidizer feed tubes ( ). By means of this burner, and more specifically of the control valve ( ), the distribution of the oxidizer between the two oxidizer feed tubes ( ) may be continuously adjusted.

Three-tube burner for furnaces, especially glass and metallurgical furnaces, and method of injecting fuel and oxidizer by means of such a burner

Combustion process and its uses for the production of glass and metal

In a process for manufacturing glass in a furnace a glass charge in solid form is introduced into a furnace-charging zone at an upstream part of a furnace. The glass charge is moved from the furnace-charging zone to a zone for removing the combustion smoke from the furnace downstream from the furnace-charging zone. The glass charge is moved from the zone for removing combustion smoke to a charge-melting zone downstream from the furnace-charging zone and located substantially in a middle of the furnace and heated by at least one burner. The glass charge is moved from the charge-melting zone to a charge-refining zone downstream from the charge-melting zone. The glass charge is brought to a desired temperature and viscosity in the charge-refining zone. The glass charge is removed from the furnace after the glass charge has been brought to the desired temperature and viscosity. The glass charge, after it has been removed from the furnace, is moved into a feed channel of glass-forming machines. Energy is delivered to the glass charge in the furnace-charging zone in an amount between 5% and 40% of a total energy delivered to the glass charge in the furnace. Energy is delivered to the glass charge throughout the entire furnace such that energy delivery is uniformly distributed over an entire length of the furnace so as to avoid exceeding a crown temperature at a hot spot of the furnace of greater than approximately 1620.degree. C., and so as to maintain a temperature in the furnace-charging zone, measured in a crown of the furnace, at least equal to 1430.degree. C.

Process for improving the thermal profile of glass ovens

A burner assembly having improved flame length and shape control is presented, which includes in exemplary embodiments at least one fuel fluid inlet and at least one oxidant fluid inlet, means for transporting the fuel fluid from the fuel inlet to a plurality of fuel outlets-, the fuel fluid leaving the fuel outlets in fuel streams that are injected into a combustion chamber, means for transporting the oxidant fluid from the oxidant inlets to at least one oxidant outlet, the oxidant fluid leaving the oxidant outlets in oxidant fluid streams that are injected into the combustion chamber, with the fuel and oxidant outlets being physically separated, and geometrically arranged in order to impart to the fuel fluid streams and the oxidant fluid streams angles and velocities that allow combustion of the fuel fluid with the oxidant in a stable, wide, and luminous flame. Alternatively, injectors may be used alone or with the refractory block to inject oxidant and fuel gases. The burner assembly affords improved control over flame size and shape and may be adjusted for use with a particular furnace as required.

Refractory block for use in a burner assembly

A burner assembly having improved flame length and shape control is presented, which includes in exemplary embodiments at least one fuel fluid inlet and at least one oxidant fluid inlet, means for transporting the fuel fluid from the fuel inlet to a plurality of fuel outlets, the fuel fluid leaving the fuel outlets in fuel streams that are injected into a combustion chamber, means for transporting the oxidant fluid from the oxidant inlets to at least one oxidant outlet, the oxidant fluid leaving the oxidant outlets in oxidant fluid streams that are injected into the combustion chamber, with the fuel and oxidant outlets being physically separated, and geometrically arranged in order to impart to the fuel fluid streams and the oxidant fluid streams angles and velocities that allow combustion of the fuel fluid with the oxidant in a stable, wide, and luminous flame. Alternatively, injectors may be used alone or with the refractory block to inject oxidant and fuel gases. The burner assembly affords improved control over flame size and shape and may be adjusted for use with a particular furnace as required.

Combustion process and apparatus therefore containing separate injection

Growing community of inventors

Versailles, France

Laurent Rio