Hazardous waste incineration system based on flue gas recirculation

The invention discloses a hazardous waste incineration system based on flue gas recirculation. The hazardous waste incineration system comprises a feeding system, an oxygen-enriched gas supply system,a waste incineration rotary kiln, a secondary combustion chamber, a slag fishing machine, a first waste heat boiler, a first induced draft fan, a second waste heat boiler, a waste gas treatment system, a second induced draft fan, a chimney and a flue gas pipeline, and further comprises a powder adding system. According to the hazardous waste incineration system based on flue gas recirculation, oxygen-enriched combustion is carried out, flue gas is recycled, on the premise that the flue gas emission amount is kept unchanged, the treatment capacity is greatly improved, the heat energy recoveryrate is greatly improved, and the average incineration treatment cost of each ton of waste is obviously reduced; and the discharge amount of the pollutants is not changed due to the fact that the discharge amount of the flue g