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一、概况自身预热烧嘴又叫换热式烧嘴,是近几年来引起各国十分重视的一种新型节能燃烧装置,它不仅能供给炉窑所需的热量,而且又是能利用炉窑排出的烟气余热来预热助燃空气(或煤气)的换热装置。这种烧嘴的特点是把燃烧器、换热器和排烟装置有机地组合成一个整体。因此,它具有结构紧凑、换热效率高、操作方便和节能显著等优点,可以燃烧煤气、柴油、重油,当更换烧嘴喷枪时,还可实现油、气共烧。对于火焰炉来说,燃料所提供的大部分热量被烟气带走,表1是美国锻造工业学会对一台缝式锻造加热炉进行热平衡对比时的理论分析数据。由表1可知,在不同条件下,烟气带走的热量是相当惊人的。在不回收烟气余热的情况下,炉子有效热(钢吸热)只占10％左右,而将空气预热到
First, an overview of its own Preheating burner, also known as the heat exchanger burner, in recent years has drawn great importance to all countries a new type of energy-saving combustion device, which not only can supply the kiln heat required, but also can use the kiln Exhausted flue gas waste heat to preheat combustion air (or gas) heat exchanger. This burner is characterized by the burner, heat exchanger and smoke extraction organically integrated into a whole. Therefore, it has the advantages of compact structure, high heat exchange efficiency, convenient operation and significant energy-saving. It can burn gas, diesel and heavy oil. It can also co-burn oil and gas when the burner is replaced. For the flame furnace, most of the fuel provided by the flue gas away, Table 1 is the United States forging industry on a slot forging furnace heat balance comparison of the theoretical analysis of data. Table 1 shows that under different conditions, the flue gas to take away the heat is quite amazing. In the case of waste heat recovery without flue gas, the furnace effective heat (steel heat) only about 10%, while the air preheated to