Resource utilization method for cyanogen-containing waste liquid generated in fenoxanil production

The invention relates to the technical field of cyanogen-containing waste liquid treatment, and in particular, relates to a resource utilization method for cyanogen-containing waste liquid generated in fenoxanil production. The method comprises the steps: adding hydrogen peroxide into cyanogen-containing waste liquid to oxidize and break cyanogen, adding alkali liquor, heating, keeping the temperature, reacting, introducing ammonia gas generated by a system into an ammonia gas falling film absorption system, and introducing ammonia water recovered by the ammonia gas falling film absorption system into a butyronitrile reaction section as a raw material to participate in the reaction. According to the resource utilization method for the cyanogen-containing waste liquid generated in fenoxanil production, hydrogen peroxide is used for carrying out cyanogen breaking treatment on the cyanogen-containing waste liquid generated in fenoxanil production, cyanogen treatment is thorough, meanwhile, ammonium in the waste