Novel reduction furnace tail gas cover

The utility model discloses a novel reduction furnace tail gas cover, which belongs to the technical field of polycrystalline silicon production, and comprises a gas inlet pipe and a discharge pipe arranged in the gas inlet pipe, a gas inlet top cover is arranged at the upper end of the gas inlet pipe, two ends of the discharge pipe are opened, a plurality of gas inlet holes are arranged on the outer wall of the middle lower part of the gas inlet pipe, and the gas inlet holes are communicated with the gas inlet pipe. The lower end of the air inlet pipe is connected with the discharging pipe through a plurality of connecting parts, an annular cavity is formed between the air inlet pipe and the discharging pipe, and the lower end of the annular cavity is cut into a plurality of silicon powder falling openings by the plurality of connecting parts. Reduction tail gas enters the annular cavity from a gas inlet formed in the side wall of the gas inlet pipe, vertically flows upwards and enters the discharging pipe f