The reliability and economy of the operation of the pulverized coal furnace furnace largely depend on the performance of the burner and the aerodynamic conditions in the furnace. Good furnace aerodynamic conditions are mainly manifested in the following three aspects.

(1) There is enough hot flue gas reflux from the combustion center to the root of the primary air-powder mixture jet, so that the fuel can be quickly heated and ignited after being sprayed into the furnace, and a stable ignition front is maintained.

(2) The distribution of fuel and air is appropriate. After the fuel is ignited, it can get sufficient air supply and achieve uniform diffusion and mixing to facilitate rapid combustion.

(3) There should be a good flame fullness in the furnace and form a moderate combustion center. This requires that the airflow in the furnace is not deflected, does not scour the furnace wall, avoids stagnant areas and useless vortex areas; the jets of each burner should not be violently interfered and collided.