This device is used to remove dioxins and heavy metal in the fume. The activated carbon bin is set on the ground, and it enters the pneumatic conveying system after being measured by a weight loss scale or a pan feeder. The powder is then transported by Roots blower or compressed air into the nozzle, which is installed in the flue between the reaction tower and the dust collector. Activated carbon is attached to the surface of the filter bag, and the high adsorption of activated carbon is used to adsorb dioxins and heavy metals in the fume.