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Thermal Oxidizers Volatile Organic Compounds (VOCs) and Hazardous Air Pollutants (HAPs) are the classifications of pollutants emitted by air streams from industrial processes. These pollutants, mostly made up of hydrocarbons, are harmful to the environment as well as humans. Thus, thermal oxidizers are placed in industrial streams to turn the hydrocarbons in VOCs and HAPs from CO2 to H2O. The block design of thermal oxidizers is composed of an oxidation chamber wherein incoming exhaust from the process system is treated with high temperature combustion, triggered by an igniter and air/oxygen-fuel mixture. There is also a blower which manages the flow density of the incoming exhaust and the time of exposure to combustion before being flushed out (for maximum Destruction & Removal Efficiency i.e. DRE). The two main configurations of thermal oxidizers are recuperative and regenerative. Their models can be seen below.

. Regenerative oxidizers are the most widely used type of pollution control technology. They are energy efficient and have high DRE’s (up to 99%+). Recuperative thermal oxidizers are less common than regenerative systems. This unit uses a heat exchanger to basically “exchange� clean air with the polluted air. There is a third type of thermal oxidizer not mentioned above, called an afterburner, which are only used on occasion. Afterburners are direct-fired units, which are the least-capital intensive, but are only used in situations in which there are a very high concentration of VOCs. The major contributors of HAPs and VOCs to the environment are industries involving manufacture of cement, ceramics, glass, detergents, alcohol, fertilizers, inorganic and organic chemicals, petrochemicals, pharmaceuticals, polymers, resins, PVCs, etc. Thus, thermal oxidizers are needed in these industries to monitor exhausts and to adhere to stringent emission criteria. For more information on thermal oxidizers, contact Stelter & Brinck at 513-367-9300 or Keywords: Thermal Oxidizer, regenerative thermal oxidizer, RTO, air pollution controls, recuperative thermal oxidizers, afterburners, voc destruction, incinerators, stelter brinck,

Thermal Oxidizers