1 results about "Inlet flow" patented technology

The invention discloses a method and a device for producing granular polysilicon by utilizing the fluidized-bed process. Hydrogen chloride is fed into a fluidized-bed reactor from an expanding section of the top of a fluidized bed and is reacted with fine silicon powder generated in the process of producing granular silicon to generate chloro-silicane gas so that risks of harm to a system due to the fact that the fine silicon powder enters a pipeline at the rear end of the fluidized bed are eliminated, fine silicon powder entrainment is eliminated simultaneously, gas inlet flow of the fluidized bed is improved so as to improve unit capacity of the rector, and production cost is lowered. Besides, the hydrogen chloride fed into the fluidized-bed reactor from the top is reacted with the fine silicon powder to generate chloro-silicane so that circulation of a certain amount of chloride in the reactor is achieved.