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为了提高热风温度(也就是提高换热器前烟气温度),我们在5号炉烟道内表面(60米~2)贴了厚度30毫米折叠式高铝质硅酸铝纤维毡。在采取此项措施前后,对有关参数作了记录和测量。详见曲线图1和对照表。烟道绝热后效果如下: 1.由于热风平均温度比绝热前提高1.38℃,使钢绽热耗降低3.2×10~4千卡/吨锭,相当于每吨钢锭节约3.65米~3天然气(占钢锭燃耗的6.3％)。 2.由于出预热器的烟气比绝热前提高
In order to increase the temperature of the hot air (that is, to raise the flue gas temperature in front of the heat exchanger), we laid a 30 mm thick high-alumina aluminum fiber mat on the inner surface of No.5 furnace flue (60m ~ 2). Before and after taking this measure, the relevant parameters were recorded and measured. See graph 1 and comparison table. The effect of the heat insulation of the flue is as follows: 1. Since the average hot air temperature is 1.38 ℃ higher than that before adiabatic heating, the heat loss of steel is reduced by 3.2 × 10 ~ 4 kcal / tonne, equivalent to saving 3.65-3 gas per tonne of steel ingot 6.3% of ingot burn). 2. Since the flue gas from the preheater is higher than before