Process for manufacturing technical glass and burner for...

F - Mech Eng,Light,Heat,Weapons – 23 – D

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F23D 14/58 (2006.01) C03B 5/00 (2006.01) C03B 5/235 (2006.01) F23D 14/22 (2006.01) F23D 14/32 (2006.01)

Patent

CA 2225269

The invention relates to a process for the manufacture of technical glass using a non-hard flame which is blue in colour and includes substantially no reducing species. It also relates to a burner (1) for implementing this process, having three coaxial ducts (3, 5, 7) for feeding gas into a combustion zone (9), namely a central duct (3) for feeding oxidant, an intermediate annular duct (5) for feeding fuel, and a peripheral annular duct (7) for feeding oxidant, the total oxidant flow rate Qo tot being determined by the equation: Qo tot = (R0 + ~R) Qc where Qc represents the nominal fuel consumption of the burner, R0 is the stoichiometric ratio between the fuel and the oxidant, and R is a stoichiometric excess. With a view to obtaining a blue flame having low momentum, the dimensions of the three ducts (3, 5, 7) satisfy particular conditions. Application, technical glass manufacture Fig. 1

Cette invention concerne un procédé de fabrication de verre technique faisant à appel à une flamme de faible puissance de couleur bleue et virtuelement sans partie réductrice. Elle concerne également un brûleur (1) à trois conduits coaxiaux (3, 5, 7) servant à achement du gaz dans une zone de combustion (9), nommément un conduit central (3) de comburant, un conduit annulaire intermédiaire (5) de combustible et un conduit annnulaire périphérique (7) de comburant, le débit total de comburant Qo tot étant établi selon l'équation : Qo tot = (R0+~R) Qc où Qc représente la consommation nominale de combustible par le brûleur, R0 le rapport stoechiométrique combustible-comburant et R une valeur d'excès de carburant ou de combustible. Afin d'obtenir une flamme bleue à faible quantité de mouvement, les trois conduits (3, 5, 7) satisfont à des critères particuliers. Application : fabrication de verre technique. Fig. 1

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