为了在大型锅炉中燃用结焦性褐煤,广泛采用多层切向布置燃烧器的炉瞠,并通过采用风扇磨煤机、烟气再循环以及分散火焰中心的办法组织低温燃烧。在这种炉膛中,可以看到由于产生巨大的对流热流体而大大强化热交换,并使水冷壁热流和炉 In order to burn coking lignite in large boilers, multi-layer burners with tangentially arranged burners are widely used and cryogenic combustion is organized by the use of fan mills, flue gas recirculation, and dispersion of flame centers. In such a furnace, it can be seen that the heat exchange is greatly intensified by the generation of a huge convective heat fluid and that the water wall heat flow and the furnace