The utility model provides a
flue gas adsorption reactor, and particularly relates to the technical field of
flue gas adsorption reactors. Which comprises an air inlet section, a venturi reactor and a turbulent flow reactor which are sequentially communicated, and is characterized in that the venturi reactor is formed by sequentially connecting a shrinkage
pipe, a
throat pipe and a
diffusion pipe, the
diameter of the
throat pipe is smaller than 1 / 3 of the
diameter of an inlet of the shrinkage pipe, and the length of the
diffusion pipe is larger than 1.5 times of the length of the shrinkage pipe; the near-gas section is arranged below the shrinkage pipe, a feeding chute with an inclination angle of 10-20 degrees is formed in the side wall of the near-gas section, and an outlet of the feeding chute extends to an inlet of a
throat pipe of the Venturi reactor. According to the utility model, through the design that the
diameter of the throat pipe in the Venturi reactor is smaller than 1 / 3 of the inlet of the shrinkage pipe and the length of the
diffusion pipe is increased by 1.5 times of that of the shrinkage pipe, the collision contact probability of
flue gas and an adsorbent is obviously improved through a high-speed jet effect, the adsorption utilization efficiency is greatly improved, the gas-
solid reaction time is prolonged, and the
adsorption reaction is more sufficient.