Introduce the sources and composition of waste gas generated in coal tar processing factories,targeting the final emission target parameters based on the characteristics of the waste gas.By comparing and selecting appropriate treat-ment processes,including washing and absorption,water washing,incineration,denitrification,desulfurization,dust re-moval,etc.,a comprehensive treatment plan for the entire process is ultimately formed,and optimization control is carried out in each link to ensure smooth operation of the process and ultimately meet emission standards.