引言 高炉煤气的热值较低(贫气),焦炉煤气的热值较高(富气),使它们按一定的比例混合亦称“加浓”。混合煤气既能保证一定的热值和必要的火焰温度,又能节约富气。 自动控制系统在保证混合煤气热值稳定的同时,还必须保证其压力为一定的正值。但是二个煤气输入量的改变,既影响混合煤 Introduction Blast furnace gas has lower calorific value (lean gas) and coke oven gas has a higher calorific value (rich gas), so that they are also mixed at a certain ratio, also known as “enriched.” Mixed gas can guarantee a certain calorific value and the necessary flame temperature, but also save gas. Automatic control system to ensure that the mixed gas calorific value stability, but also must ensure that the pressure is a certain positive value. However, changes in the input of the two gases affect both the mixed coal