Gas distribution device and chlorination furnace

The invention discloses a gas distribution device and a chlorination furnace. The device comprises a distribution plate, a plurality of supporting plates and a plurality of supporting plates, wherein a plurality of through holes are formed in the distribution plate; the plurality of branch pipes penetrate through the plurality of through holes; the main air inlet pipe is arranged on the outer side of the bottom surface of the distribution plate, and the branch pipes are communicated with the main air inlet pipe; wherein the top surface of the distribution plate is provided with a plurality of grooves, the size of each groove is gradually reduced from a groove opening to a groove bottom, and the groove bottom of each groove is communicated with each through hole. According to the invention, a fluidization dead zone can be reduced or avoided from being formed at the non-perforated part of the distribution plate, so that the condition that sintering occurs at the bottom of the chlorination furnace when the fluid