The air supply mode of incinerator can be divided into two types: air supply on the hearth and air supply under the hearth. Generally, 100% - 300% excess air is added, that is, the air ratio is between 2.0-4.0.

For the two-stage controlled air incinerator, add 70% - 80% of the theoretical air volume in the first combustion chamber, and supplement the air volume in the second combustion chamber to 140% - 200% of the theoretical air volume. Because of the lack of oxygen combustion in the first combustion chamber, increasing the air flow will increase the combustion temperature; However, in the second combustion chamber, there is superoxide combustion, and increasing the air flow will reduce the combustion temperature. Secondary air is mostly injected from both sides to accelerate indoor air mixing and turbulence.

Theoretically, there is little difference between forced ventilation system and suction system. The advantage of the air suction system is that it can avoid the leakage of incineration flue gas, but since the system often contains acid gas generated by incineration, the corrosion of equipment must be considered.