Fluidized bed reactor with multiple recycle gas inlet nozzles

Fluidized bed reactor for the gas-phase polymerization of olefins, comprising a gas distribution grid mounted at the lower part of the fluidized bed reactor and a gas recirculation line equipped with a compressor and a heat exchanger and connected at the upper end and top in the fluidized bed reactor, wherein the gas recirculation line is divided at the lower end into at least two substantially horizontal branches, the at least two substantially horizontal branches being tangentially connected to the fluidized bed reactor below the gas distribution grid; and a process for preparing an olefin polymer carried out in the fluidized bed reactor. 用于烯烃气相聚合的流化床反应器，其包括安装在流化床反应器下部的气体分配格栅和气体再循环管线，所述气体再循环管线配备有压缩机和热交换器并在上端与顶部连接在所述流化床反应器中，其中所述气体再循环管线在下端分成至少两个基本水平的支路，所述至少两个基本水平的支路在所述气体分配格栅下方与所述流化床反应器切向连接；以及在所述流化床反应器中进行的用于制备烯烃聚合物的方法。