▎ 摘　　要

NOVELTY - Device comprises a nozzle including a feed port (32), a discharge port (34), and a tube body (33) connected between the feed port and the discharge port, and a pressurizer (31) connected to the feed port for pressurizing a graphite dispersion liquid to enter the tube body from the feed port, where the tube has at least a first cavity (3301), a second cavity (3302), and a third cavity (3303) with a reduced inner diameter from the inlet to the outlet, so that the graphite sheet of the graphite dispersion liquid flows through the tube to gradually reduce the number of large-area graphene layers with at least 20 layers, the side walls on one side of the first cavity and the second cavity are on the same plane, and the outlet of the first cavity and the inlet of the second cavity are the same, one end of the first cavity facing away from the same plane is provided with an inlet, and the other end is provided with an outlet. USE - The device is used for high-efficiency manufacturing of large-area graphene. ADVANTAGE - The device improves the production efficiency, shortens the production cycle and reduces the production costs. DETAILED DESCRIPTION - Device comprises a nozzle including a feed port (32), a discharge port (34), and a tube body (33) connected between the feed port and the discharge port, and a pressurizer (31) connected to the feed port for pressurizing a graphite dispersion liquid to enter the tube body from the feed port, where the tube has at least a first cavity (3301), a second cavity (3302), and a third cavity (3303) with a reduced inner diameter from the inlet to the outlet, so that the graphite sheet of the graphite dispersion liquid flows through the tube to gradually reduce the number of large-area graphene layers with at least 20 layers, the side walls on one side of the first cavity and the second cavity are on the same plane, and the outlet of the first cavity and the inlet of the second cavity are the same, one end of the first cavity facing away from the same plane is provided with an inlet, and the other end is provided with an outlet, a first rotary drum for driving the graphite dispersion liquid is arranged in the first cavity near the inlet, and a second rotary drum for driving the graphite dispersion liquid to rotate is arranged in the second cavity. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the device. Pressurizer (31) Feed port (32) Tube body (33) Discharge port (34) First cavity (3301) Second cavity (3302) Third cavity (3303)