The Qinhuangdao West Zone Green Island VOCs Centralized Treatment Project, designed and constructed by CADAIR, has been successfully accepted and has maintained stable operation for nearly one year.
As a key environmental infrastructure project serving multiple manufacturing enterprises within the industrial park, the facility adopts the Green Island model featuring unified collection, centralized treatment, and integrated operation and maintenance. By consolidating VOCs treatment resources at the park level, the project provides an efficient, reliable, and cost-effective solution for industrial air pollution control while supporting the park’s long-term sustainability goals.
The successful implementation and stable operation of the project further demonstrate CADAIR’s expertise in delivering large-scale VOCs treatment solutions for industrial parks and manufacturing industries.
A Centralized VOCs Treatment Solution for Industrial Parks
As environmental regulations continue to evolve and industrial parks pursue greener development pathways, centralized environmental infrastructure has become an increasingly effective approach to VOCs management.
The Qinhuangdao West Zone Industrial Park is home to multiple manufacturing enterprises that generate VOC-containing exhaust gases during coating and painting operations. Traditional decentralized treatment systems often require each enterprise to install and maintain its own environmental equipment, resulting in higher investment costs, increased operational complexity, and varying treatment performance.
To address these challenges, CADAIR developed a comprehensive park-wide VOCs treatment solution and established a centralized treatment center that integrates:
- Unified exhaust gas collection
- Centralized VOCs treatment
- Unified environmental supervision
- Professional operation and maintenance services
Through this Green Island model, multiple enterprises can share a centralized treatment facility, improving resource utilization efficiency while reducing environmental management burdens for individual manufacturers.
800,000 m³/h Treatment Capacity Supporting Multiple Enterprises
As a major environmental infrastructure project within the industrial park, the facility consists of four large-scale VOCs treatment systems with a combined treatment capacity of:
800,000 m³/h
The system is capable of treating exhaust gases generated simultaneously by multiple coating and painting operations throughout the industrial park.
To address the characteristics of coating exhaust gases—including large airflow volumes, low VOC concentrations, and complex pollutant compositions—CADAIR leveraged its extensive engineering experience and system integration capabilities to develop a highly efficient and reliable centralized treatment solution.
Key Technical Highlights
Duty-and-Standby Configuration for Enhanced Reliability
Each treatment system is designed with a duty-and-standby configuration to ensure continuous operation.
During equipment maintenance or servicing, the standby unit can be activated immediately, preventing operational interruptions and ensuring that production activities within the industrial park remain unaffected.
This redundancy design significantly improves operational reliability and system stability.
Zeolite Rotor Concentration + RCO Technology
The project adopts a proven combination of Zeolite Rotor Concentration and Regenerative Catalytic Oxidation (RCO) technology.
Low-concentration VOC-laden exhaust gases are first concentrated through the zeolite rotor system, achieving concentration ratios of up to 18 times. The concentrated VOC stream is then directed to the RCO unit for high-efficiency oxidation treatment.
Key benefits of this process include:
- High VOC removal efficiency
- Reduced energy consumption
- Lower equipment investment costs
- Stable long-term operation
- Reduced maintenance requirements
The RCO system achieves VOC removal efficiencies exceeding 99%, ensuring consistent compliance with emission standards.
Four-Stage Precision Filtration System
To protect critical equipment and maintain long-term operational stability, the project incorporates a four-stage filtration system consisting of:
- G4 pre-filter
- F5 medium-efficiency filter
- F7 fine filter
- F9 high-efficiency filter
The filtration system effectively removes paint mist, particulate matter, and high-boiling-point compounds before they enter the concentration and oxidation systems.
Performance indicators include:
- Filtration efficiency ≥99%
- Particulate concentration ≤1 mg/m³
This design significantly extends the service life of key equipment and enhances overall system reliability.
Nearly One Year of Stable Operation Demonstrates Long-Term Reliability
Since completing project acceptance, the facility has operated continuously and stably for nearly one year, maintaining excellent treatment performance and operational reliability.
Throughout this period, all key environmental indicators have consistently remained within regulatory requirements. Monitoring results show that non-methane hydrocarbon (NMHC) concentrations have been maintained below 30 mg/m³, demonstrating the effectiveness of the treatment process and the robustness of the overall system design.
The project’s sustained operational performance validates not only the quality of the engineering implementation but also CADAIR’s capabilities in the design, construction, and delivery of large-scale centralized VOCs treatment facilities.
Driving Sustainable Industrial Development
The Qinhuangdao West Zone Green Island VOCs Centralized Treatment Project represents a successful example of transitioning from decentralized environmental management to centralized, park-level governance.
By enabling multiple enterprises to share a unified VOCs treatment platform, the project improves environmental performance, optimizes resource allocation, and reduces operational costs, creating long-term value for both industrial enterprises and the surrounding environment.
Looking ahead, CADAIR will continue to advance innovation in industrial air pollution control technologies, providing efficient, reliable, and sustainable environmental solutions for industrial parks and manufacturing enterprises worldwide.
Through engineering excellence, technological innovation, and long-term service support, CADAIR remains committed to helping industries achieve cleaner production, regulatory compliance, and sustainable growth.
