Organic solvents are widely used in industries such as fine organic synthesis, coating and printing, and petrochemicals. These solvents typically have low boiling points and are highly volatile (known as VOCs, or volatile organic compounds). Production facilities inevitably emit VOC-containing exhaust gases, leading to environmental pollution. Due to the complex composition and wide concentration fluctuations of VOCs in these exhaust gases, treating them presents significant challenges. Furthermore, since VOCs are flammable and explosive, both high and low concentrations can lead to safety hazards such as explosions during gas mixing and combustion.

  Based on the emission characteristics of these exhaust gases, our company has developed a combined process of solution absorption and catalytic combustion to treat such organic exhaust gases. Depending on the VOC concentration, solution scrubbing can adjust the VOC content in the exhaust gas to an appropriate range and may even recover useful, high-value-added organic compounds. The remaining VOCs are then completely combusted through catalytic oxidation, producing harmless H₂O and CO₂, thereby ensuring the exhaust gas meets emission standards.

  The technical advantages of the organic exhaust gas treatment process developed by our company are as follows:

  (1) By adjusting the scrubbing removal efficiency of the absorption solution based on the VOC concentration in the exhaust gas, the VOC concentration in the mixed exhaust gas is maintained between 4 and 10 mg/Nm³. This ensures the combustion temperature remains between 200 and 450°C, effectively preventing catalyst deactivation caused by excessively high temperatures or failure to ignite due to excessively low temperatures; At the same time, valuable organic compounds can be recovered through the regeneration of the absorbent, providing economic benefits;

  (2) By using a monolithic combustion catalyst, the pressure drop across the combustion reactor is kept below 1 kPa/m, reducing fan power consumption;

  (3) Depending on the types of VOCs in the exhaust gas, monolithic catalysts with different active components are selected; The catalyst features high activity, excellent heat resistance, long service life, and low cost;

  (4) A specialized gas mixer ensures rapid and uniform mixing of high- and low-concentration VOCs from different sources, preventing localized VOC concentrations in the exhaust gas from exceeding the explosive limit range; the treatment process is rationally designed to prevent static electricity buildup within the system; this completely eliminates explosion hazards, ensuring the safe and long-term operation of the treatment unit.