For VOC organic waste gas generated from the fluorescent penetrant inspection process and acidic waste gases such as hydrochloric acid mist and sulfuric acid mist produced in the pickling process, a classified collection and separate pipeline treatment system is adopted: pickling waste gas is neutralized and purified via alkaline washing spray; penetrant organic waste gas undergoes oil removal pretreatment followed by activated carbon adsorption treatment. The purified tail gas is either discharged after meeting emission standards or released through high-altitude exhaust stacks. This system effectively eliminates workshop odors and corrosive flue gas, complying with environmental emission requirements.