... for sawdust, 3-5mm;The characteristics of biomass burner:1. Use the biomass pellet and agriculture (straw, wheat straw, cornstalk, corn ... SO2 and other harmful gas, environmental3. Screw feeding material, high temperature increasing oxygen, control the temperature and water automatically.4 ... asphalt heating equipment, aluminum melting equipment and so on. biomass pellet burner for 2000kw steam boiler