The refreshing cool air delivered by household air conditioners comes at a hidden environmental cost during production. Long before finished units reach end consumers, core manufacturing workflows — cabinet shell spraying, interior component coating, PU thermal insulation foaming, plastic injection molding and PCB circuit board fabrication — continuously discharge hazardous volatile organic compounds (VOCs), including benzene, toluene, ethyl acetate, xylene and formaldehyde.
Large automated spraying workshops generate waste gas at flow rates up to 60,000 m³ per hour, presenting a classic industrial treatment headache: high air volume paired with low pollutant concentration, plus frequently fluctuating mixed VOC compositions.
CADAIR Integrated Zeolite Rotor + RTO Treatment System
CADAIR’s tailor-made combined process is engineered to resolve these complex working conditions, consisting of three core functional modules:
Four-stage graded filtration pre-treatment
Intercepts paint mist, particulate dust and high-boiling resin contaminants to prevent zeolite rotor clogging and extend core equipment service life.
Hydrophobic zeolite rotor adsorption & concentration
Condenses dilute VOC-laden waste gas by a factor of 5 to 30, maintaining a steady VOC adsorption efficiency of over 92%.
Three-chamber RTO regenerative thermal oxidation
Fully decomposes concentrated VOC pollutants at high temperature. The complete system delivers an overall purification efficiency ranging from 95% to 99.99%, with ceramic heat storage media achieving heat recovery rates exceeding 95% to cut operational fuel consumption drastically.
Field-Proven Large-Scale Industrial Cases
CADAIR’s process suite has been fully validated across diverse mass-production home appliance manufacturing sites:
Qinhuangdao Industrial Park Green Island Central Treatment Project
Designed for a total waste gas throughput of 800,000 m³/h, the facility deploys four sets of zeolite rotor + RCO integrated units. Non-methane total hydrocarbon (NMTHC) emissions are consistently controlled below 30 mg/m³, with uninterrupted stable operation spanning over 300 days.
Ultra-High-Flow Interior Component Spraying Treatment Project
Boasts a processing capacity of 500,000 m³/h, adopting a dual parallel zeolite rotor layout matched with a shared RTO furnace. The system achieves 30-fold VOC concentration and has run continuously without faults for more than 560 days, passing all official environmental acceptance audits.
PCB Circuit Board Manufacturing Waste Gas Project
Custom zeolite rotor + CO catalytic combustion packages are deployed to tackle formaldehyde, xylene and other toxic emissions generated during PCB developing, coating and screen printing. Single projects support treatment air volumes upwards of 100,000 m³/h, while controlling trace heavy metal co-contaminants simultaneously.
From large-area surface spraying to precision electronic component fabrication, CADAIR delivers fully customized VOCs abatement solutions built for stable long-run performance, outstanding energy savings and full persistent compliance with regional and national emission standards.
Behind the Cool Air: VOCs Abatement for Air Conditioner Production & Spraying
Before air conditioners arrive at homes, shell spraying, interior coating, PU foaming, injection molding and PCB fabrication release toxic VOCs such as benzene, toluene and formaldehyde. Mass spraying lines exhaust waste gas at 60,000 m³/h, marked by high air volume, low VOC concentration and variable pollutant mixtures.
CADAIR Zeolite Rotor + RTO All-in-One System
- 4-stage pre-filtration: Blocks paint mist, dust and high-boiling impurities
- Zeolite rotor concentration: 5–30x VOC enrichment, ≥92% adsorption efficiency
- RTO thermal oxidation: 95%–99.99% total purification rate, ≥95% heat recovery for low energy cost
Verified Large-Scale Projects
- Qinhuangdao Green Island Central Treatment Plant: 800,000 m³/h throughput via 4 zeolite rotor + RCO units; NMTHC < 30 mg/m³, 300+ days of stable operation.
- High-Capacity Interior Coating Line Solution: 500,000 m³/h processing capacity with dual rotors + shared RTO; 30x VOC concentration, 560+ days continuous runtime.
- PCB Production Waste Gas System: Custom zeolite rotor + CO catalytic combustion units for formaldehyde & xylene treatment, single-unit capacity over 100,000 m³/h.
CADAIR customizes reliable, energy-efficient VOCs treatment systems for all air conditioner manufacturing workflows to sustain full environmental compliance.
