▎ 摘　　要

NOVELTY - The system has a graphene filter (5) connected to an outlet of a transverse main vent pipe (3) and a waste gas outlet of a laboratory fan. A processing capacity of the graphene filter depends upon a diameter of a vertical vent pipe (2) and the transverse main vent pipe, the fan power. A specific design determines an exhaust gas concentration, damage harm degree to an environment and human. The graphene filter volume is composed of the vertical vent pipe and the transverse main vent pipe, where thickness of a graphene titanium-di-oxide photo-catalytic layer (5-1) is about 5-10 mm and thickness of a graphene active carbon absorbing layer (5-2) is about 5-25 mm. USE - Laboratory graphene filter controlled fume bonnet exhaust gas purifying system. ADVANTAGE - The system realizes self-purification process in a simple manner so as to improve purification efficiency, and has prolonged service life and wide application range. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a laboratory graphene filter controlled fume bonnet exhaust gas purifying system in partial section. Vertical vent pipe (2) Transverse main vent pipe (3) Graphene filter (5) Graphene titanium-di-oxide photo-catalytic layer (5-1) Graphene active carbon absorbing layer (5-2)