What are the mainstream technical approaches for VOCs organic waste gas treatment?

VOCs Organic Waste Gas Treatment—Mainstream Technical Approaches

1. Adsorption Concentration Technology

Porous media such as activated carbon and zeolite rotors (cylindrical/disc-shaped) efficiently adsorb and concentrate low-concentration, high-volume VOCs, achieving concentration ratios of up to 5-25 times.
The adsorption material is recyclable, with energy recovery achieved through thermal regeneration or gas purging. It is suitable for linking pretreatment with downstream combustion/oxidation units.

2. Catalytic Oxidation (CO)

Using precious metal or metal oxide catalysts, VOCs are oxidized and decomposed into CO₂ and H₂O at temperatures around 300-400°C, consuming significantly less energy than direct thermal oxidation.

It is suitable for low- to medium-concentration, flammable, and explosive organic waste gases and has a high tolerance for temperature fluctuations.

3. Thermal Oxidation (TO)

Directly combusts VOCs at high temperatures (800-850°C), completely destroying the organic molecules and achieving a removal rate of up to 99%. Relatively low investment, suitable for stable flow rates and high-concentration exhaust gases, but with high fuel consumption.
4. Regenerative Thermal Oxidation (RTO)

Recovering waste heat from combustion through a ceramic bed or metal heat exchanger achieves a heat recovery efficiency of ≥98%, significantly reducing operating costs.

Suitable for large air volumes and low-concentration VOCs, it combines high removal rates with energy savings.
5. Regenerative Catalytic Oxidation (RCO)

Combining catalytic oxidation with regenerative heat recovery, it operates at a temperature of only 300-400°C, achieving similarly high heat recovery levels with lower operating energy consumption.
6. Condensation Recovery Technology

For organic solvents with high boiling points (such as dichloromethane and DMF), cooling and condensation are used to recover solvents and reduce raw material loss.
7. Other Auxiliary Technologies

Plasma, photocatalysis, biofilter beds, and absorption (liquid phase) can be used individually or in combination under specific operating conditions to enhance overall treatment effectiveness.

What complete solutions does Lv Quan Environmental Protection Engineering Technology Co., Ltd. provide for VOCs treatment projects?

1. Front-End Pretreatment and System Integration

Pretreatment units such as dust removal, oil removal, and temperature reduction remove large particles, oil mist, and high-boiling-point substances, providing a stable entry point for subsequent processes.

The company provides comprehensive services, from process design, equipment manufacturing, on-site installation, commissioning, and operational training, ensuring "one-stop" project delivery.

2. Adsorption Concentration Unit

Zeolite Rotor Concentration System: Cylindrical/disc-shaped zeolite rotors achieve efficient adsorption and concentration of VOCs, with concentration ratios reaching 10-15 times.

Activated Carbon/Activated Carbon Fiber Adsorption: Granular activated carbon adsorption condensation recovery systems and activated carbon fiber organic solvent recovery equipment enable the recycling of high-boiling-point solvents.

3. Oxidation and Combustion Unit

Catalytic Oxidation (CO): Equipped with a catalytic combustion unit, oxidizes VOCs at low temperatures, reducing energy consumption and ensuring compliance with emission standards.

Thermal Oxidation (TO): A direct-fired, high-temperature oxidation furnace suitable for medium- and high-concentration exhaust gases, achieving high removal rates. Regenerative Thermal Oxidation (RTO): A zeolite rotor + RTO system combines adsorption, concentration, and thermal oxidation, achieving high heat recovery efficiency and low operating costs.
Regenerative Catalytic Oxidation (RCO): A zeolite rotor + RCO system combines the advantages of catalytic low-temperature oxidation with heat recovery.
4. Solvent Recovery and Reuse System

Granular Activated Carbon Adsorption and Condensation Recovery: For organic solvent waste gas, adsorption is performed followed by condensation, achieving efficient solvent recovery and reuse.
Activated Carbon Fiber Recovery Equipment: A specialized fiber adsorption device suitable for recovering high-boiling-point, low-concentration solvents, reducing raw material costs.
5. Comprehensive Engineering Services

Design and R&D: Customized process solutions are provided based on industry standards and customer requirements.
Manufacturing and Assembly: Over 200 sets of machining equipment ensure product quality and delivery time.
Installation and Commissioning: On-site construction, system integration, and performance verification ensure stable equipment operation.
After-sales Maintenance: Long-term technical support, spare parts supply, and operational optimization services are provided to ensure project benefits throughout the entire lifecycle.