The carbon content of activated carbon filter cotton is about 35%-50%. It can be widely used to treat organic gases such as toluene, xylene, benzene, phenols, esters, alcohols, aldehydes, odorous gases and gases with low concentration and high air volume containing trace heavy metals. The exhaust gas can be adsorbed and purified and discharged directly. Compared with the traditional activated carbon filter, it has better aerodynamic performance, smaller volume density, larger specific surface area, higher adsorption efficiency and smaller wind resistance coefficient.