Safety and Compliance: Environmental Requirements and Safe Operating Procedures for Car Spray Booths

① Paint Mist Purification:

• Dry Booths: Filter cotton must be replaced regularly (typically after painting 5–8 vehicles) to ensure a paint mist removal rate of $mathbf{ge 90%}$.

• Wet Booths: Water tanks must be cleaned regularly (weekly) to maintain efficiency.

② VOCs Treatment:

• Emissions concentration should be $mathbf{le 80text{mg/m}^3}$ (referencing Chinese standards).

• High-throughput scenarios require supporting equipment like RTO (Regenerative Thermal Oxidizer) systems to achieve compliance with VOCs emission standards.

③ Exhaust Gas Monitoring:

• Some regions require the installation of online monitoring equipment to record VOCs concentration in real time and submit periodic reports to environmental protection authorities.

① Pre-Operation Check:

• Confirm the proper functioning of the ventilation system, heating unit, and fire extinguishing equipment (e.g., dry chemical extinguishers, $text{CO}_2$ systems). Operation is strictly forbidden if equipment is faulty.

② Personnel Protection:

• Operators must wear respirators (filtered or supplied-air types), solvent-resistant gloves, and anti-static work uniforms to prevent skin contact with paint and inhalation of harmful gases.

③ Prohibition of Open Flames:

• Smoking, using lighters, or any open flames are strictly prohibited inside the spray booth and within a $mathbf{5text{m}}$ radius of it. Equipment must have anti-static grounding devices.

④ Paint Material Storage:

• Only the paint required for the current job should be stored inside the booth. Remaining materials must be sealed and stored in a dedicated explosion-proof warehouse.

⑤ Curing Operation:

• The spray booth air intake must be closed during curing. The temperature must not exceed the paint manufacturer's specified limit (typically $mathbf{le 80^circtext{C}}$) to prevent paint cracking.

⑥ Emergency Protocol:

• In case of paint mist leakage or a high VOCs concentration alarm, immediately stop the operation, turn on all ventilation devices, and troubleshoot the fault only after the concentration drops to a safe level.