Emission Analysis And Pollution Control Study On Red Smoke From Hazardous Waste Incineration System Chimney

Hazardous waste incineration has the advantages of harmlessness,resource utilization,and rapid volume reduction.In recent years,it has been rapidly developed in China.The number of hazardous waste furnaces is increasing.The discharge of pollutants from hazardous waste incineration systems has attracted widespread attention.While the environmental protection department is paying close attention to the emission of conventional pollutants and dioxins in the flue gas from hazardous waste incineration,the problem of visual pollution of colored flue gas from the chimneys of certain hazardous waste incinerators has become increasingly prominent.This article focuses on the emission of red smoke and other colored plumes from the chimney of a hazardous waste incineration company,and conducts an in-depth study on the mechanism of red smoke and its control methods.The main contents include:（1）Investigate the causes of red smoke emitted from the chimney of the hazardous waste incineration system.By analyzing the possible ways of forming various colored plumes,it is found that the red smoke is related to the red trivalent iron compounds in the smoke.The Fe content in the flue gas at the outlet of the bag filter is relatively high,but its particle size is much smaller than the particle size collected at the chimney,so the iron-containing particles in the flue gas at the outlet of the bag are formed in the absorption liquid of the deacidification tower.The red particles with larger particle size form red smoke during the emission of this part of the red particles with the flue gas.（2）Based on the fractal theory,the experimental method and computer simulation are combined to study the growth law of Fe（OH）₃ flocs.;develop a DLA model for simulating the growth of Fe（OH）₃ flocs on the MATLAB platform;the experimental method shows that the Fe³⁺concentration and reaction time are positively related to the size and tightness of the flocs,while the flow rate of the absorbing liquid is negatively related to the size and tightness of the flocs..（3）Physical filtration is used to reduce the concentration of particulate matter in the absorption liquid of the deacidification tower,and reduce the inhibition of the generation of colored smoke plumes from the chimney from the source.For small-size colored particles that cannot be removed by physical filtration,chemical reagent modification is used to eliminate the red smoke in the flue gas emission process,and the automatic dosing device and the red smoke online warning platform are combined to eliminate red smoke.The device realizes real-time early warning and rapid elimination of the red smoke phenomenon.Through theoretical analysis,experimental investigation,and sampling analysis,the paper clarified the way of red smoke generation in the hazardous waste incineration plant.The paper proposes a comprehensive solution combining filtering,chemical decolorization and image recognition,which solves the environmental protection operation problems of hazardous waste incineration plants,and provides a realistic and feasible way for the treatment of colored plumes in solid waste incineration.It has important application value.