Aircraft Manufacturing & Maintenance

In the field of aviation manufacturing and maintenance, exhaust gas treatment faces the characteristics of “one big two low” : the treatment air volume is large (the air volume of a single spray room reaches 200,000-300,000 m³/h); Low emission concentration (VOCs mean 50-200mg/m³), low emission load (annual effective emission time <1200h).

Analysis of the Characteristics of Typical Emission Sources

• Complete machine spraying section
Fluorine-containing primer spraying	overspray spray containing PTFE particles (particle size 1–5 μm), styrene concentration peak 150–300 mg/m³
Stealth coating construction	high proportion of xylene, amine solvents
• Composite material workshop
Prepreg curing	acetone/MEK solvent volatilization (concentration gradient 30–120 mg/m³), long discharge cycle (4–8 h/batch)
Autoclave exhaust	trace phenolics (<5 ppm) with epoxy resin decomposition products
• Engine maintenance section
Paint removal process	The instantaneous concentration of dichloromethane reaches 800-1200mg/m³ (lasting 10-15min)
Oil circuit cleaning	Mixed emission of aviation kerosene vapor (lower explosive limit 0.6%VOL) and cleaning agent (trichloroethylene accounted for 40-60%)

Key treatment difficulties

Air volume concentration mismatch

Complex and changeable components

Strict safety control

Equipment start-stop loss

Construction path of CADAIR technical system

🔁 Elastic concentration system

Adaptive concentration rotor, dynamic adjustment of concentration ratio 10-50 times, continuous/intermittent desorption dynamic adjustment

📊 Dynamic Adjustment System

Dual parameter linkage of air volume and concentration, response time <30s

🔥 Combustion System

Catalytic oxidizer (CO)/Regenerative Thermal oxidizer (RTO) multi-stage load design (25%/50%/75%/100% four-stage load regulation)Catalytic oxidizer (CO)/Regenerative Thermal oxidizer (RTO) multi-stage load design (25%/50%/75%/100% four-stage load regulation)%MCEPASTEBIN%