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工业上广泛应用低热值发生爐煤气有重大的意义,是今后发展的方向。但是,过去在应用低热值发生爐煤气方面受到一定的限制,一般发生爐煤气的发热值视煤质优劣而不同,一般为1100～1500大卡/米~3,而以发热值在1200～1300大卡/米~3的煤气较为普遍。因此,在工业用爐中采用此种发热值的清洗煤气时,特别是在锻造加热爐方面,就必须考虑能否满足锻造加热温度的要求。一般锻件锻造温度为1150～1250℃,而爐温则要求达到1250～1350℃,甚至有要求达到1400℃的。因此,在采用这种低热值煤气时,必段采用予热空气、煤气,或者空气和煤气同时予热的办法来保证达到锻造温度的要求,由于爐型的不同,仅空气就
The widespread application of low calorific value furnace gas in industry is of great significance and is the direction of future development. However, in the past, the use of low calorific value furnace gas has been subject to certain restrictions. Generally, the calorific value of the furnace gas varies depending on the quality of the coal, and is generally 1100 to 1,500 kcal/m 3, and the calorific value is 1200 to 1300 kcal/m3 gas is more common. Therefore, in the industrial furnace using such an exothermic value of the cleaning gas, particularly in the forging furnace, it must be considered whether it can meet the forging heating temperature requirements. General forgings forging temperature of 1150 ~ 1250 °C, while the furnace temperature is required to reach 1250 ~ 1350 °C, and even required to reach 1400 °C. Therefore, when using this kind of low calorific value gas, the preheated air, gas, or air and gas preheating must be used to ensure that the forging temperature is met. Due to the difference in furnace type, only the air is used.