前言我国锻造生产能力已居世界前列,其锻件年产量1985年约为185万吨,仅次于日本、苏联和美国。但与之配套的锻造加热炉炉子热效率却很低,仅为2～5％,锻件实际单耗平均达700～800公斤标煤/吨锻件,比日、美、苏等国(100～300公斤标煤/吨锻件)高3～4倍。由此可见,锻件加热炉热能回收,降低燃料消耗是一项迫切和带有长远政策性的任务。锻造加热炉排烟温度高(850～1100℃),烟气带走的热量占供入炉内热量的50％以上。因此,锻造加热炉的节能,除加强能源管理体系,提高炉子本身的装备水平外,最重要的是回收利用高温烟气余热。目前,锻造炉上所用各型金属预热器 Foreword China has forged the world’s foremost forging capacity and its annual output of forgings was about 1.85 million tons in 1985, second only to Japan, the Soviet Union and the United States. But with its supporting forging furnace furnace thermal efficiency is very low, only 2 to 5%, forging actual average unit consumption of 700 to 800 kg standard coal / ton forgings, than Japan, the United States, the Soviet Union and other countries (100 ~ 300 kg Standard coal / ton forgings) 3 to 4 times higher. Thus it can be seen that it is an urgent and long-term policy task to recover the thermal energy of the forging furnace and reduce the fuel consumption. Forging furnace exhaust gas temperature is high (850 ~ 1100 ℃), flue gas heat taken into the furnace heat accounted for more than 50%. Therefore, the energy saving forging furnace, in addition to strengthening the energy management system, improve the level of their own equipment, the most important thing is to recycle high temperature flue gas waste heat. At present, forging furnace used on all types of metal preheater