Adjusting Parameters to Strengthen In-furnace Airflow Disturbance

Secondary Air Parameters

Air volume: Increasing secondary air volume significantly strengthens in-furnace airflow disturbance. A moderate increase makes secondary air mix more intensely with primary air and combustion flue gas. As secondary air volume rises, turbulence increases, allowing unburned particles and gas to diffuse better in the furnace and increasing contact with oxygen to promote combustion. However, excessive air volume can cause the furnace temperature to drop too quickly or blow out the flame.

Air speed: A higher secondary air speed enhances its penetration of the in-furnace airflow. Higher speed drives secondary air deeper into the combustion zone, breaking the original airflow stratification. For example, by adjusting the secondary air nozzle design or air pressure so the secondary air enters at higher speed, the flame and flue gas are effectively disturbed and oxygen is delivered better to under-combusted zones.

Direction and angle: Reasonably adjusting the direction and angle of secondary air is crucial for strengthening disturbance. It can be tuned according to the combustion status in the furnace and the flame…