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自身预热烧嘴是近代火焰炉上新出现的一种先进的燃烧装置,它把烧嘴、换热器和排烟系统有机地结合在一起,同时具有供热、排烟、回收废热三种功能,能减少废热损失、降低燃耗、提高炉温。但是,国外这种烧嘴只适用于高热值燃料,并只能预热空气一种介质,又必须采用高合金耐热钢和特种耐火材料制造,每个烧嘴的供热能力较低,又都是直焰,要求空、煤气供气压力很高,且须强制排烟,因而要消耗辅助能源。为了克服上述缺点,针对国内机械行业大都应用的低热值煤气燃料,我
Preheating burner itself is a new type of advanced combustion device in modern flame furnace. It combines burner, heat exchanger and exhaust system organically together, and has three kinds of heat supply, exhaust and waste heat recovery Function, can reduce waste heat loss, reduce fuel consumption and improve the furnace temperature. However, foreign burner is only suitable for high calorific value fuel, and can only preheat a medium of air, it must be made of high alloy heat-resisting steel and special refractory material. Each burner has lower heating capacity, Are straight flame, requiring air, gas supply pressure is high, and must be forced to smoke, thus consuming auxiliary energy. In order to overcome the above shortcomings, for most of the domestic machinery industry, low calorific gas fuel, I