| • Pretreatment line emission | |
| Automatic spraying section | high-solid content anti-corrosion paint generates paint mist particles (D50=8–15 μm), initial VOCs concentration is 2,000–4,000 mg/m³ |
| Drying and curing section | sharp exhaust gas temperature gradient (room temperature →120℃→80℃, with change rate >20℃/min) |
| • Stage painting emission | |
| Large spraying booth | the peak concentration of VOCs during construction reaches 1,200–1,800 mg/m³ and lasts for 3 to 4h |
| 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 |
