Abstract: In view of the high material consumption for the present activated carbon injection process, in order to expand the diffusion area of single activated carbon injection points, the activated carbon powder injection test bench was build. Then based on the experiment results for the three types of nozzles, it was found out that the powder injection outperformed the pipe direct injection, in which the diffusion area at 750 mm away from the nozzle was expanded by 73.58%, 201.89% and 137.74% respectively compared with direct pipe injection, while no significant diffusion area improvement was observed for activated carbon powder injection with built-in swirl vane. Additionally, by means of commercial CFD software, the numerical simulation method of activated carbon dry powder injection was developed, and the effectiveness of the model was verified through experimental studies. Therefore, the activated carbon dry powder injection model can be used as a guidance in the actual engineering project to arrange injection points scientifically.