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自六十年代以来,国外广泛地应用高速烧咀。其特点是每个烧咀自带燃烧室,能喷出高温、高速的热气流。喷出速度范围为50～300米/秒,烧咀燃烧室容积热强度为(10～100)×10~6千卡/米~3时,燃烧室内压力最大达350—700毫米水柱,燃烧室出口处燃烧完全程度,烧煤气时为95％,烧轻柴油时约70％。高速烧咀按其应用技术可分为二类:即快速加热和强化炉气搅拌。使用高速烧咀使炉气强烈搅拌循环,炉子温差可达±5～±10℃。烧咀喷出的动量愈大,搅拌的效果就愈好。故增加气流速度与质量流量均能改善炉内气体循环,循环倍数(被循环的炉气量与喷出量之比),可在10～200倍范围内变动。进入高速烧咀前的煤气和空气的压力要求比一般烧咀高,并随喷出速度的增加而增大。
Since the 1960s, foreign high-speed burning Tsui widely used. Its characteristic is that each burning Tsui comes with a combustion chamber, can spray high temperature, high speed hot air. Spray speed range of 50 ~ 300 m / s, burning nozzle combustion chamber volume heat intensity (10 ~ 100) × 10 ~ 6 kcal / m ~ 3, the combustion chamber pressure up to 350-700 mm water column, the combustion chamber Exit complete combustion, 95% when burning gas, light diesel when burning about 70%. High-speed burning nozzle according to its application technology can be divided into two categories: rapid heating and strengthening furnace gas mixing. The use of high-speed burning Tsui furnace gas mixing cycle, the furnace temperature can reach ± 5 ~ ± 10 ℃. The larger the momentum of jet nozzle, the better the stirring effect. Therefore, increasing the gas flow rate and mass flow can improve the gas circulation in the furnace. The multiple of circulation (the ratio of the furnace gas volume to the discharge volume being circulated) can vary from 10 to 200 times. Before entering the high-speed burner Tsui gas and air pressure requirements than ordinary burners Tsui, and increased with the ejection speed increases.