▎ 摘　　要

NOVELTY - Large reaction kettle comprises a shaft sealing device, a transmission device, a protective support frame and a gas collecting bottle. The support frame is provided with a reaction bottle, which is connected with a constant temperature groove. The upper part of the reaction bottle is provided with a feeding port and a tail gas discharge port, and the lower part is provided with a lower port. The reaction bottle is a double-layered structure, and its middle part is provided with an interlayer, and is equipped with a variable frequency speed regulation stirrer and a temperature measuring pipe. USE - The reaction kettle is useful for industrial preparation of graphene. ADVANTAGE - The reaction kettle: utilizes multiple feeding ports to avoid contamination between the different raw materials; and has large volume and compact structure; and is a suitable container for large amount of physical and chemical reactions. DETAILED DESCRIPTION - Large reaction kettle comprises a shaft sealing device, a transmission device, a protective support frame (2) and a gas collecting bottle. The support frame is provided with a reaction bottle (1), which is externally connected with a constant temperature groove (3). The upper part of the reaction bottle is provided with a feeding port (4) and a tail gas discharge port (5), and the lower part is provided with a lower port. The reaction bottle is a double-layered structure, and its middle part is provided with an interlayer, and is equipped with a variable frequency speed regulation stirrer and a temperature measuring pipe. The regulation stirrer is provided with a tachometer with digital display. The temperature measuring pipe is provided with a digital display temperature controller. The tail gas discharge port is connected with the gas collecting bottle through a condensing pipe. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the large reaction kettle. Reaction bottle (1) Protective support frame (2) Constant temperature groove (3) Feeding port (4) Tail gas discharge port (5)