▎ 摘　　要

NOVELTY - The utility model claims an exhaust device for heating PET particles, comprising a fan; an air inlet set near the PET particle heating device, and an air outlet connected with the fan; the air inlet is connected with the fan through a telescopic pipe; the air outlet is provided with a filter device; the filter device comprises multiple layers of fibre cloth with different specifications; the multi-layer fibre cloth is coated with a graphene layer; the multi-layer fibre cloth passes through the direction of the filtered object; the aperture is gradually reduced; the suction is provided by the fan; the air inlet absorbs the toxic waste gas generated near the PET heating device and reduces the toxic waste gas in the factory; the telescopic pipe makes the air inlet can change the distance with the PET heating device; when the PET heating device is operated at high speed, it is close to the non-high speed operation, so as to avoid excessive influence of the temperature and humidity of the PET particles when heating; the waste gas is filtered by multiple layers of fibre cloth; the filtering effect is better; and the graphene layer coated on the multi-layer fibre cloth is used for filtering the pollutant particles with minimum grain diameter.