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1.水冷却穿入式小炉燃烧器(throughport burner)的形式、应用及特性。所有的水冷却燃烧器都由一个水套和喷嘴组成,可以是整体的,也可以是分开的。水套常是圆柱形的,直径为65—100毫米。水套设计要非常严格以避免局部过热,当散失的热通量约为550,000千卡/米~2/时情况下能有长的使用寿命。每个燃烧器的水流速度常在45—70升/分。喷嘴为中等压力(1.3—2.8公斤/厘米~2)空气型,其他喷射气体如蒸汽或天然气也可以用。喷射形式可以是圆锥形的,或者是平的(即具有水平喷射角达75°的扇形)。圆锥形喷嘴能适应多种形式的小炉。但如要使火焰达到要求的长度和覆盖面积,在大型小炉中要用多个燃烧器。
1. Water-cooled forms, applications and features of through-flow burners. All water-cooled burners consist of a water jacket and nozzles, either integral or separate. Water jacket is often cylindrical, a diameter of 65-100 mm. Water jacket designs must be rigorously designed to avoid localized overheating and have a long service life when dissipated heat flux is about 550,000 kcal / m 2 / hr. Water flow rate per burner is often 45-70 liters / min. The nozzles are medium pressure (1.3-2.8 kg / cm 2) air and other injection gases such as steam or natural gas are also available. The spray pattern may be conical or flat (ie, having a fan shape with a horizontal spray angle of 75 °). Conical nozzle to adapt to many forms of small stove. However, in order to achieve the required length and coverage of the flame, multiple burners are used in large small furnaces.