As global environmental regulations tighten, industries handling dichloromethane (DCM) face increasing pressure to achieve ultra-low emissions while maintaining cost efficiency. At CADAIR, we deliver advanced VOCs treatment and solvent recovery solutions tailored to complex industrial scenarios.
This article highlights several real-world project cases demonstrating our expertise in DCM-containing waste gas treatment across optical materials, chemical processing, and multi-component chlorinated emissions.
📌 Project Case 1: Optical Film Industry (TAC Production)
Client: Lucky Optical Materials Co., Ltd. Location: Suqian, Jiangsu Province, China Project: TAC Film Production Line #3 Waste Gas Treatment
Key Challenges
- High concentration of dichloromethane (7,000 mg/m³)
- Mixed solvent system including methanol
- Large air volume (29,000 m³/h)
- Strict emission requirement: DCM < 15 mg/m³
CADAIR Solution
We implemented a high-efficiency integrated recovery system:
- Pre-treatment
- Carbon fiber adsorption
- Carbon fiber rotor concentration
- Two-stage scrubbing towers
(Also known as KF + KB recovery process)
Results
✔ Significant reduction of DCM emissions ✔ Stable compliance with ultra-low emission standards ✔ Solvent recovery contributing to operational savings
📌 Project Case 2: Chemical & Environmental Technology Sector
Client: Solvent Environmental Technology (Shanghai) Co., Ltd.
Waste Gas Composition
- Dichloromethane (DCM)
- Acetonitrile
- Tetrahydrofuran (THF)
- Methanol & Ethanol
- Water vapor
Key Parameter
- Air volume: 4,000 m³/h
CADAIR Solution
- Resin adsorption recovery system
Results
✔ Efficient separation of multi-component VOCs ✔ Resource recovery of valuable solvents ✔ Flexible process design for varying gas compositions
📌 Project Case 3: Chlorinated Multi-Component Waste Gas Retrofit
Client: Rianlon (Zhongwei) New Materials Co., Ltd.
Background
- Existing RTO system suffered severe corrosion due to chlorinated compounds
- Waste gas contained:
CADAIR Solution
- Customized chlorinated VOCs retrofit system
- Optimization of process to replace/upgrade traditional RTO limitations
Results
✔ Eliminated corrosion risks ✔ Improved system stability and lifespan ✔ Enhanced treatment efficiency for complex VOC mixtures
🔬 Our Technical Advantages in DCM Treatment
CADAIR has developed a comprehensive technology portfolio for dichloromethane and chlorinated VOCs:
✔ Carbon Fiber Adsorption & Recovery
- High adsorption efficiency
- Ideal for medium-to-high concentration VOCs
- Enables solvent reuse
✔ Resin Adsorption Technology
- Suitable for complex multi-component systems
- Strong selectivity and regeneration performance
✔ Concentration + Scrubbing Systems
- Effective for high airflow and fluctuating concentrations
✔ Chlorinated VOCs System Retrofit
- Solves corrosion issues in traditional RTO systems
- Extends equipment lifecycle
🌍 Industry Applications
Our solutions are widely applied in:
- Optical film manufacturing (TAC film)
- Fine chemicals and petrochemicals
- New materials production
- Pharmaceutical intermediates
🚀 Why Choose CADAIR?
- Proven track record in DCM waste gas treatment
- Custom-engineered solutions for complex VOC mixtures
- Focus on emission compliance + resource recovery
- Strong project delivery experience across industries
📩 Let’s Talk
If your facility is dealing with dichloromethane or chlorinated VOC emissions, CADAIR can help you achieve compliance while optimizing operational costs.
👉 Contact us today to explore tailored solutions.
