NOVELTY - Double-tank polycrystalline silicon device for producing wool by wet method comprises a reaction tank (2) provided with a liquid discharging port and a secondary liquid injecting pipe (4). The top part of the secondary liquid injecting pipe is equipped with multiple small holes and is connected with the liquid discharging port of a drug liquid circulation pump through a primary liquid injecting pipe (3) outside the reaction tank. A liquid feeding port of the drug liquid circulation pump is connected with the bottom part of a refrigerating tank (6) through a liquid conveying pipe.    USE - The double-tank polycrystalline silicon device is useful for: producing wool by wet method and manufacturing crystalline silicon semiconductor and solar cell.    ADVANTAGE - The device: improves the production and the quality of the wool; prepares the product with high yield and in a cost-effective manner; does not cause fragmentation; exhibits high performance-cost ratio. The reflection ratio of the produced wool is less than 20%.    DETAILED DESCRIPTION - Double-tank polycrystalline silicon device for producing wool by wet method comprises a reaction tank (2) provided with a liquid discharging port and a secondary liquid injecting pipe (4) at the bottom part. The top part of the secondary liquid injecting pipe is equipped with multiple small holes capable of spraying drug liquid upwards and is connected with the liquid discharging port of a drug liquid circulation pump through a primary liquid injecting pipe (3) outside the reaction tank. A liquid feeding port of the drug liquid circulation pump is connected with the bottom part of a refrigerating tank (6) through a liquid conveying pipe. One side of the refrigerating tank is provided with a cooling water tank. An evaporator of a compression refrigerating device provided with a controller is located in a refrigerating liquid in the cooling water tank. The liquid discharging port of a condensing pipe (5) positioned in the refrigerating tank is connected with the liquid feeding port of the cooling water tank. The liquid discharging port of a refrigerating liquid circulation pump is connected with the liquid feeding port of the condensing pipe and the liquid feeding port of the refrigerating liquid circulation pump is connected with the liquid discharging port of the cooling water tank.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of the double-tank polycrystalline silicon device.    Reaction tank (2)    Primary liquid injecting pipe (3)    Secondary liquid injecting pipe (4)    Condensing pipe (5)    Refrigerating tank (6)