利用出炉发氣的熱來予熱燃燒燃料所需要的空氣,可以顯著地節省燃料和提高爐膛內氣體的温度。因此,有理由說,空氣予熱裝置是現代化炉子的基本組成部份之一。 予熱空氣時燃料的節省 空氣不予熱時,爐子的熱平衡可以寫成下面的方程式: 式中:B——燃料的潸耗量,千卡/小時或米~3/小時;q_x——對單位體積廢氣而言的燃料的化學熱,或燃料的發熱量,千卡/米~3; The use of released heat to preheat the air needed to burn the fuel can significantly save fuel and raise the temperature of the gas in the furnace. Therefore, it is reasonable to say that the air preheater is one of the basic components of a modern furnace. When the hot air to save fuel when the air is not hot, the furnace heat balance can be written as the following equation: Where: B - consumption of fuel, consumption, kcal / h or m ~ 3 / h; q_x - for the unit volume of exhaust gas In terms of the chemical heat of the fuel, or the calorific value of the fuel, kcal / m ~ 3;