▎ 摘　　要

NOVELTY - The technique involves firstly crushing the two-dimensional crystal with ink material by a crusher, and collecting the particles after crushing, using sulfuric acid, nitric acid chemical reagent and potassium permanganate, hydrogen peroxide of oxidant for oxidation, stirring, increasing the distance between graphite layer, inserting oxide between graphite layer and layer to obtain the graphite oxide powder solution, cleaning the clean water, placing the cleaned solution into a tubular centrifuge to separate the residual graphite oxide powder, and finally collecting the oxidized graphite powder after separating, where the drying device comprises a placing table (1) whose corner of right top part is connected with control panel (2). The middle of top part of placing table is provided with a heating rotating device (3). The top of heating rotating device is provided with multiple storage devices (4). The right top of placing table is provided with a conveying device (5). USE - The technique is useful for extracting graphene in material learning, micro-nano processing, energy, and biomedicine and drug delivery. ADVANTAGE - The technique: solves the problem that the accumulated drying will not completely dry; compares delay time because of the characteristic of powder itself after drying; slightly encounters flow and the phenomenon of flying in device resulting in the problem of troublesome when collecting; prevents the spray head from leaving; disperses graphene powder of inner cavity of nozzle; avoids the inconvenience caused by manual butt joint and circuit problem of electromagnetic valve; does not emit the generated heat energy and cause the influence of heat energy around; and allows rotating cylinder to rotate to generate airflow. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the dust environment-friendly drying technique. Placing table (1) Control panel (2) Heating rotating device (3) Storage device (4) Conveying device (5)