▎ 摘　　要

NOVELTY - The device has a preheating device (1), an atomizing device (2), a flash drying unit (3) and a flash heat stripping unit (4) that is connected in sequence. The flash drying unit is provided with a flash drying device (5) and a first gas-solid separation device (6) that is connected in sequence. The flash heat stripping unit is provided with a flash heat stripping device (7) and a second gas-solid separation device (8) that is connected in sequence. The flash drying device that is connected with the atomization device. The discharge port of the first gas-solid separation device that is connected to the flash heat stripping device. The gas outlets of the second gas-solid separation device are respectively independently connected with the flash drying device and the flash heat stripping device. USE - Device system for preparing single-layer graphene used in electronic device, photoelectric material, and integrated circuit (IC). Can also be used in solar cell, photovoltaic cell, and photonic device. ADVANTAGE - The system inhibits the stacking and agglomeration phenomenon of graphene, realizes the scale and continuous production and directly obtains the single-layer graphene. The heat steam generated by the Flash (RTM: Computer multimedia application) drying unit is recycled, which improves the energy utilization efficiency and reduces the production cost. The system is orderly provided with a preheating device, an atomizing device, a Flash (RTM: Computer multimedia application) evaporation drying unit and a Flash (RTM: Computer multimedia application) heating stripping unit, and the graphene oxide slurry is preheated and atomized in turn. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: a method for preparing single-layer graphene by using the device system, and #a single-layer graphene prepared by the method. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the device system for the preparation of single-layer graphene. (Drawing includes non-English language text) Preheating device (1) Atomizing device (2) Flash drying unit (3) Flash heat stripping unit (4) Flash drying device (5) First gas-solid separation device (6) Flash heat stripping device (7) Second gas-solid separation device (8)