| • Pretreatment line emission | |
| Automatic spraying section | high-solid anti-corrosion paint produces paint mist particles (D50=8–15 μm), initial VOCs concentration 2,000–4,000 mg/m³ |
| Drying and curing section | severe exhaust gas temperature gradient (room temperature → 120 °C → 80 °C, change rate >20 °C/min) |
| • Stage painting emission | |
| Large spraying room | the peak concentration of VOCs during construction reaches 1,200–1,800 mg/m³ for 3 to 4 h |
| Mixed pollutants | overspray fog (particle size distribution 0.5–50 μm) and benzene series/ester VOCs compound |
| Emission scale | the total treated air volume of a single shipyard can reach more than 1 million m³/h |
