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马钢500/300轧钢加热炉为三段连续式燃油加热炉,1981年曾对此炉作过热平衡测定,其热效率为34.63％,燃耗为0.595×10~6kcal/t坯,排烟温度为700℃,出炉烟气带走的热量占总耗热量的32.97％。 为了提高该炉的热效率和降低燃料消耗,根据公司重点节能改造规划,于1981年设计了一套空气预热器和余热锅炉的余热回收装置(图1)。该装置中预热空气送加热炉作助燃风。余热锅炉生产的蒸汽并入厂区管网。
Masteel 500/300 rolling furnace for the three sections of continuous heating furnace, 1981 had overheating the furnace for the determination of the thermal efficiency of 34.63%, fuel consumption of 0.595 × 10 ~ 6kcal / t blank, the exhaust temperature of 700 ℃, the flue gas taken away accounted for 32.97% of the total heat consumption. In order to improve the thermal efficiency of the furnace and reduce fuel consumption, a set of waste heat recovery devices for air preheaters and waste heat boilers was designed in 1981 according to the company’s key energy-saving renovation plan (Figure 1). The device preheated air sent to the furnace for combustion air. Waste heat boiler steam into the plant pipe network.