Thermal desorption

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DEKONTA pays systematic attention to development and implementation of new methods of waste processing. The process usually involves laboratory and model tests, pilot plant verification in the presence of representatives of the state authorities and – if positive results are achieved – giving assent to operating the respective technology. Thermal desorption and chemical oxidation belong to the methods verified both on laboratory and pilot-plant level

The technology leads to removal of volatile organic substances from treated waste by applying a heat source - usually at a temperature of 300 - 450 °C (low-temperature thermal desorption). Heating is carried out in reduction atmosphere, so as in this technology stage, burning has not occurred. Desorbed gases are burned in a burn-out chamber at a temperature ensuring safe thermal destruction of contaminants present (usually 900 - 1,200 °C). Cyclone separators and texture filters are used for dust extraction. In the case of chlorinated substances and/or heavy metals the cleaning system of extracted gases must be completed with wet washing.
DEKONTA has at its disposal a resistance box furnace for performing laboratory experiments of thermal desorption with samples up to 1 - 2 kg and an electric heated rotary kiln (diameter of 30 cm, length of 3.5 m) for pilot-scale verification tests.