| 摘要 |
<p>In a glass melting furnace (10) of the type that has a basin (12) wherein a bath (20) of molten glass is heated by a blanket (30) of flame that extends over the molten bath (20), performance and productivity are enhanced by installing oxygen injection lances (100) through holes (104) that are drilled through walls (14) of the furnace above the top surface (22) of the molten bath of glass in the furnace basin (12). The lances are thin walled tubes that each carry an adjustable flange (150) for preventing unwanted convection and radiation through furnace wall holes (104) that receive the lances (100). By bending the thin walled tubes (50) to carefully direct the discharging flows (102) of oxygen so that the discharge paths properly extend across the top surface (22) of the molten glass in closely spaced, parallel relationship thereto, and by selecting discharge opening size and configuration, the injected flows of oxygen are aimed and defined so as to effectively draw the blanket (30) of flame down to the suface portion (22) of the glass that is being heated, and to achieve complete combustion and maximum flame coverage. The lance discharge opening is preferably designed as a laval nozzle.</p> |
