Chlorination reaction tail gas purification method and application thereof

The invention discloses a purification method and application of chlorination reaction tail gas, and belongs to the technical field of chemical organic waste gas treatment.The purification method comprises a first washing device, a first circulating tank, a second washing device and a second circulating tank; the method comprises the steps that S1, chlorination reaction tail gas is input into a first washing device for primary washing, and a primary chlorination product obtained after washing is input into a first circulating tank for circulating washing; s2, inputting the tail gas subjected to primary washing into a second washing device, carrying out secondary washing, inputting a washed secondary chlorination product into a second circulating tank, carrying out circulating washing, discharging the tail gas from the second washing device, enabling the tail gas to enter a detection device, and discharging the tail gas out of the device after the tail gas is detected to be qualified; qualified hydrochloric ac