Fire extinguishing device and polycrystalline silicon production system

The invention provides a fire extinguishing device and a polycrystalline silicon production system and belongs to the field of polycrystalline silicon production. The fire extinguishing device comprises a tank body, an induction device, a controller and a gas conveying pipe. A check valve is arranged on the gas conveying pipe and is connected with a gas source. The gas source can provide incombustible gas. The gas conveying pipe is connected with the tank body. The induction device is arranged on the top of the tank body or arranged in the tank body. The induction device is connected with the controller, and the controller controls opening and closing of the check valve. The polycrystalline silicon production system comprises a drip washing tower and the above fire extinguishing device which are connected. When combustible gas coming out of the drip washing tower catches the fire and after the induction device inducts flames, a signal is given to the controller, the controller opens the check valve on the gas