Regenerative thermal oxidizers
V.O.C. (Volatile Organic Compounds) Removal in a Gaseous Stream Through Thermal Oxidation
The removal of V.O.C.s in a gaseous stream via thermal oxidation involves increasing the airflow temperature (under suitable conditions of turbulence and residence time) to enable the decomposition reaction:
V.O.C. + O₂ + Activation Energy → CO₂ + H₂O + Heat
Thanks to this exothermic reaction, the temperature increases further, proportional to the concentration of inlet pollutants and their caloric value.
Description
The raw gas is extracted by a fan. If the airflow is not steady, a suction regulation system (e.g., inverter) is typically installed, optimizing energy consumption.
The plant includes a thermal recovery section integrated and coaxial to the combustion chamber. The hot, purified streams exiting the combustion chamber are utilized to preheat the inlet polluted air.
Specially designed valves, developed and tested for reliability and safety in this specific application, enable start-up with ambient air, stand-by conditions, and the control of preheat temperature in cases of high inlet concentration.
The purified air is then discharged to the stack or directed to an additional thermal recovery section.
Features and Advantages of the System
- High Removal Efficiency (98–99.5%)
- Compact Dimensions and Reduced Weight
- Minimal Production of Secondary Pollutants (CO, NOx)
- Potential for Additional Heat Recovery
- Simple Operation and Maintenance
