Gas distributor for triphase slurry bed reactor

The utility model provides a gas distributor for a triphase slurry bed reactor, which mainly comprises a gas-guide tube, a lower gas hood, an upper gas hood, an end cover, a check ball, an upper flow-guide disc, a lower flow-guide disc and nozzles, wherein the gas-guide tube is connected with the lower gas hood by screw threads; the lower flow-guide disc is fixed at the upper end of the gas-guide tube; a lifting hole is formed in the center of the upper end of the upper flow-guide disc; the end cover is mounted above the lifting hole in a sealing manner; the upper flow-guide disc is fixed in a clamping groove in the lower end of the upper gas hood; the lower end of the upper gas hood is connected with the upper end of the lower gas hood by screw threads; a flow-guide channel is formed between corresponding arc-shaped end faces of the upper and the lower flow-guide discs; the check ball is arranged in the flow-guide channel and positioned below the end cover; a down channel of gas flow is formed by an annular space between an internal wall of the lower gas hood and an external wall of the gas-guide tube; gas distribution holes are formed in the lower end face of the lower gas hood; and the nozzles are mounted on the gas distribution holes. With the adoption of the gas distributor, the problems of blocking, counterflow, solid deposition and the like due to unstable gas flow pressure or interruption of gas supply can be solved or relieved.