Spooner offers a full range of proven emission control technologies which include Regenerative Thermal Oxidisers (RTOs), as well as Catalytic, Thermal Recuperative and Direct Fired oxidiser systems. This enables our engineers to design an unbiased solution that optimises the best technology for your company. Oxidisers destroy Hazardous Air Pollutants (HAPs), Volatile Organic Compounds (VOCs) and odorous emissions that are often discharged from industrial processes. Emission destruction is achieved through the process of high temperature thermal or catalytic oxidation, converting the pollutants to carbon dioxide and water vapour, due to the proper mix of temperature, residence time and turbulence within the reactor chamber.
Regenerative Thermal Oxidisers (RTO)
Regenerative Thermal Oxidisers consist of a number of ceramic media chambers or beds, connecting to the combustion chamber. The VOC and HAP laden process gas enters the oxidiser through an inlet manifold to flow control valves that direct the gas into one of the beds. 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 in the media beds that are in the outlet flow direction from the combustion chamber. Poppet or butterfly valves alternate the airflow direction into the media beds to maximise energy recovery within the oxidiser. The oxidisation and 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.
Regenerative Catalytic Oxidisers (RCO)
With a regenerative catalytic oxidiser, a catalyst is included in the combustion chamber of a regenerative thermal oxidiser to enable the oxidisation process to take place at lower temperatures.
Thermal Recuperative Oxidisers
During operation of a thermal recuperative oxidiser, VOC-laden air is drawn into the system fan and is discharged into the system's heat exchanger. The air is preheated through the tube side of the heat exchanger and then passes the burner, where the contaminated air is raised to the thermal oxidation temperature. When the VOC-laden air is raised to the thermal oxidation temperature for the specified residence time (0.5 - 2.0 seconds), an exothermic reaction takes place. The VOCs in the air stream are converted to carbon dioxide and water vapor. The hot, purified air then passes on the shell side of the heat exchanger where the energy released by the reaction is used to preheat the incoming air. The heat exchanger minimizes the system's fuel consumption with the system being self-sustaining at moderate LEL levels. Finally, the contaminant-free air is exhausted into the atmosphere.
Catalytic Recuperative Oxidisers
With a catalytic recuperative oxidiser, a catalyst bed is introduced into the combustion chamber. The catalyst oxidises the hydrocarbons to carbon dioxide and water vapor at significantly lower temperatures than thermal oxidisers.
