Reactor for producing high-purity granular silicon

A reactor for the production of high purity granular silicon, comprising:

• at least a reaction chamber equipped with at least a solid feeding port positioned at top of the reaction chamber;
• a solid output port positioned at bottom of the reaction chamber, an auxiliary gas inlet;
• a raw material gas inlet;
• and an outlet for exhaust gas;
• the reaction chamber being configured to receive silicon granules and to allow the silicon granules to form a silicon bed layer;
• the reaction chamber being internally equipped with at least a gas distributor for the dispersion of auxiliary gas and raw material gas to deposit silicon on the surface of silicon granules inside the reaction chamber;
• wherein a dynamics generating unit is further included inside the reactor, said dynamics generating unit being configured to cause said silicon granules to move inside said reaction chamber, and the reaction chamber is configured to provide a cross-flow mode,
• wherein the overall silicon granule moving direction and the raw material gas flow direction in the reaction chamber are generally perpendicular to each other.