Direct Fired Thermal Desorption
Direct Fired Thermal Desorption consists of a rotary desorber drum and an attendant air pollution control equipment system. The rotary drum desorbs the contamination from the soil matrix and it joins with the combustion gases and exits the rotary drum. This counter-current and or parallel flow system provides highly efficient heat transfer and flue gas temperature control. As the drum rotates, flighting along the drum’s interior surface lifts the soil and drops it in a succession of thin “veils,“ exposing the surface of the soil particles to the stratified temperature profile in the drum, maximizing heat transfer. Prior to discharge, treated soils are cooled by water sprays to facilitate dust-free handling.