A Regenerative Thermal Oxidiser (RTO) destroys emissions through the process of high temperature thermal oxidation. The RTO has become the most widely used emission abatement technology for industrial and manufacturing processes due to its ability to re-use the thermal energy generated during operation to reduce operating costs and energy consumption.
RTOs consist of a number of ceramic media chambers or beds, connecting to the combustion chamber. The VOC and HAP laden process gas is delivered to the oxidiser inlet manifold via a system fan and is then directed into one of the beds via flow control valves. The process gas is progressively heated in the ceramic media bed as it moves towards the combustion chamber. Once oxidised in the combustion chamber, the purified air releases thermal energy as it passes through the media bed in the outlet flow direction. Poppet or butterfly valves alternate the airflow direction into the media beds to maximise energy recovery within the oxidiser. The high energy recovery within these oxidisers reduces the auxiliary fuel requirement and saves operating costs – the units can reach self-sustaining operation with no auxiliary fuel usage (auto-thermal) at low inlet VOC concentrations.