Combined-type gas distributor and fluidized bed reactor

The invention belongs to the technical field of chemical engineering, and particularly discloses a combined-type gas distributor and a fluidized bed reactor. The combined-type gas distributor comprises a first gas distributor body and a second gas distributor body. The first gas distributor body comprises a gas distribution header pipe, gas distribution branch pipes and nozzles, wherein the gas distribution header pipe, the gas distribution branch pipes and the nozzles are basically arranged in the same plane; the gas distribution branch pipes are connected to the gas distribution header pipe,and the nozzles are uniformly arranged on the gas distribution header pipe and the gas distribution branch pipes. The second gas distributor body comprises lower-layer perforated plates and upper-layer perforated plates which are arranged from bottom to top in sequence, each layer of perforated plate is provided with staggered holes, and the second gas distributor body is arranged above the firstgas distributor body. Acc