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AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et Exploitation des Procedes Georges Claude
InventorsLahcen Ougarane, Thierry Legiret
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Provided is a process for the production of a loop-shaped flame in a glass furnace. The furnace includes, in a rear part, a glass melting zone heated by injecting through at least one port a fuel gas and an oxidizer gas having more than 50 vol % of oxygen and, in a front part, a glass refining zone. The process involves defining a stoichiometry coefficient Ks of the flame in the melting zone or the refining zone according to the following formula: ##EQU1## The oxidizer gas and the fuel gas injected through at least the first port are adjusted to obtain a stoichiometry coefficient Ks in the glass melting zone equal to at most 0.8. A fuel-oxidizer mixture is injected into the refining zone to obtain a stoichiometry coefficient Ks in the refining zone which is greater than the stoichiometry coefficient Ks in the melting zone and which is between 0.8 and 1.5. An oxidizer gas is injected into the melting zone in the vicinity of a fume discharge zone to obtain a quantity of oxygen in the fumes of between 0.5 and 3% by volume. The invention has particular applicability to end-fired furnaces with recuperators in which the blocking of the recuperator makes it necessary to employ ports with oxygen during the blocking of the recuperator, to maintain output at an acceptable volume.
A process for the production of a loop-shaped flame in a glass furnace, the furnace comprising, in a rear part, a glass melting zone heated by injecting through at least one first port a fuel gas and an oxidizer gas comprising more than 50 vol % of oxygen and, in a front part, a glass refining zone, the process comprising:
A process for temporary conversion of an end-fired glass furnace, the furnace comprising means for recovering heat from gases burnt in the furnace, at least one air-fuel port disposed in a rear part of the furnace for creating a flame above a bath of glass, the flame having the shape of a loop extending above a glass melting zone and a glass refining zone to in proximity to a front wall of the furnace, bounding the glass refining zone, and then returning above the glass melting zone toward the rear part of the furnace, and at least two zones for charging unmelted glass, said at least two zones being disposed in proximity to the rear wall of the furnace and in the glass melting zone, the process comprising:
Dependencies are inferred from the claim text.