Discrete catalyst screening and spraying system and method for carbon material growth

The invention relates to the technical field of discrete catalyst spraying, and discloses a discrete catalyst screening and spraying system and method for carbon material growth. The spraying system comprises an aerodynamic prism, an electric spark device is arranged at one end of the aerodynamic prism, and the other end of the aerodynamic prism is connected with a vacuum spraying chamber; a movement system is arranged in the vacuum spraying chamber and comprises a substrate rolling unit and a substrate moving unit, a flow limiting hole, a first buffer chamber, a carrier gas inlet, a sheath gas inlet, a second buffer chamber, a focusing hole, a third buffer chamber and an acceleration nozzle are sequentially arranged in the aerodynamic prism, and the acceleration nozzle communicates with the interior of the vacuum spraying chamber through a connecting port. The acceleration nozzle communicates with the outside through the gas outlet. According to the discrete catalyst screening and spraying system and method