Gas from the combustion of fuel, the heating value of which has been substantially spent and which is, therefore, discarded to the flue or stack.
燃料燃烧产生的气体，其热值已大体上耗尽，因此排入烟道或烟囱。
The computations also show that for a regenerativereforming device, the flow direction of fuel and steam is the same as that of flue gas.
同时，计算表明，对于蓄热式催化重整器而言，燃料与水蒸汽的流动方向应采用与热烟气相同的流动方向。
The excessive air coefficient, flue gas emission temperature and fuel consumption are three major factors affecting the heat efficiency of the furnace.
过剩空气系数、排烟温度、燃料用量是影响加热炉热效率的三个主要因素。
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