Considering the fact that during analysis the data clearly indicated emissions with nearly constant air flow characteristics and also considerable pollutant mass flows, a 5-chamber regenerative thermal oxidation plant was installed.
In this solution, each regenerative chamber contains a ceramic bed that functions as a heat accumulator and is heated-or cooled-depending on the direction of the emission flow through it.
The emission to be purified reaches chambers 1 and 2 and passes through the ceramic bed that has been heated, during the previous step, so it is heated to a temperature as close as possible to the reaction temperature (which is about 900 °C).
This temperature is maintained by self-combustion of the contaminants in the emission, but it can also be controlled by the introduction of auxiliary fuel into the heating transistors. The emission to be treated remains at the combustion temperature for a sufficient residence time.
After leaving the combustion chamber, the purified emission flows vertically from top to bottom through chambers 3 and 4. The average duration of these intervals is variable and is automatically adjusted according to a logical process that is part of Brofind’s know-how.
The fifth chamber allows for further treatment of the part of the emission that is not fully treated, which, during flow reversal, could, without it, be conveyed directly to the stack.