The types of pollutants generated during waste incineration are numerous, and their components are complex and changeable. The flue gas contains a large number of harmful substances, including nitrogen oxides (NOx), sulfur dioxide (SO₂), hydrogen chloride (HCl), carbon monoxide (CO), etc. These gases have a serious impact on both the environment and human health, and they are highly corrosive and irritating. At the same time, the flue gas is characterized by high humidity, a high dew point temperature, fine particles, and a low density.