Abstract: Maldistribution of gas-solid flow strongly affects the stable and safe operation of gas-solid fluidized bed reactor. In this paper, the fluidized reactor of gas phase polyethylene unit is taken as the research subject to identify and regulate the maldistribution of gas-solid flow based on the range and standard deviation of temperature in jet impact zone and stagnant zone above distribution plate. The results show that there is maldistribution of gas-solid flow in the fluidized bed reactor, and the maldistribution of gas-solid flow in the jet impact zone is more serious than that in the stagnant zone. When the condensate content of recycle gas at the inlet of fluidized bed is less than 10 wt%, the maldistribution is improved with the increase in the condensate content. When the condensate content is higher than 10 wt%, the condensate content has no obvious effect on the maldistribution.

Key words: fluidized bed reactor, maldistribution, polyethylene, condensate