Regenerative thermal oxidisers, treatment of volatile organic compounds (VOC)

This type of thermal oxidiser is used when there is little need for recovered heat. The volatile organic compounds (VOCs) from the process are drawn in by means of a motor driven centrifugal fan.

Effluent gas is heated and then cooled after combustion of the pollutants in towers loaded with beds of ceramics.

To achieve perfect thermal oxidation of the VOCs, the following three conditions must be met :

• temperature between 750 and 950°C ;
• dwell time of the effluent in the combustion chamber between 0.6 and 1 second ;
• adequate turbulence for efficient mixing of effluent and oxygen.

This type of oxidiser is suitable for high effluent flow rates.

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