Closed gas-phase polymerization reaction device

The utility model relates to the field of gas-phase polymerization, in particular to polymerization of aniline, and discloses a closed gas-phase polymerization reaction device which comprises a reaction box, the reaction box is provided with a sealing cover with a liquid adding hole, a fixed rod with a hook and an adjustable sliding rod with the hook, the liquid adding hole in the sealing cover with the liquid adding hole is located at the edge of the sealing cover, and the fixed rod with the hook is connected with the fixed rod. The fixed rod with the hook and the adjustable hook sliding rod with the hook are arranged at the near upper ends of the four sides of the inner wall of the reaction box, the adjustable hook sliding rod with the hook is arranged above the fixed rod with the hook, and the fixed rod with the hook and the adjustable hook sliding rod with the hook can be connected with a gas-phase polymerization carrier. According to the closed gas-phase polymerization reaction device, reaction liquid is