Inner and outer ring feeding split-ranging control structure of polycrystalline silicon reduction furnace

The utility model relates to the technical field of polycrystalline silicon production, in particular to an inner and outer ring feeding split-ranging control structure of a polycrystalline silicon reduction furnace, which comprises a reduction furnace, a cold hydrogen mixing pipeline and a hot hydrogen mixing pipeline, an inner ring feeding structure and an outer ring feeding structure are arranged in the reduction furnace; the cold hydrogen mixing pipeline is communicated with the inner ring feeding structure and used for mixing normal-temperature hydrogen and TCS gas, and a first temperature adjusting device used for adjusting the temperature of the mixed gas is arranged on the cold hydrogen mixing pipeline; and the hot hydrogen mixing pipeline communicates with the outer ring feeding structure and is used for mixing high-temperature hydrogen and TCS gas, and a second temperature adjusting device used for adjusting the temperature of the mixed gas is arranged on the hot hydrogen mixing pipeline. The feedin