Axial flow fixed bed gas-solid catalytic reactor

The utility model relates to an axial flow fixed bed gas-solid catalytic reactor aiming at solving the problems that because reactant gas flow distributes unevenly and backflows after passing through a gas pre-distributor on the inlet of a fixed bed reactor, the gas flow in the catalyst bed layer of the reactor distributes unevenly, the catalyst can not be utilized evenly and completely, and moreover, the pressure drop loss of the reactor is larger in the prior art. In the utility model, the axial flow fixed bed reactor provided with a two-stage holed-baffle type inlet gas pre-distributor is adopted, the inlet gas pre-distributor comprises a distributor barrel (13), a multi-hole upper baffle (15) and a multi-hole lower baffle (17); the multi-hole upper baffle (15) and the multi-hole lower baffle (17) are homocentric oval baffles or sphere baffles in up and down cascading; the distributor cylinder (13) and the upper baffle as well as the upper baffle and lower baffle are both connected through vertical tiepiec