Air Clear LLC engineers developed the first-ever transportable direct-fired rotary kiln used for soil remediation. The system required special considerations for mobility, waste feed and temperature control.
Client: US Army Toxic & Hazardous Materials Agency
Location: Savannah Army Depot, Savannah, Illinois USA
Background: During the manufacturing of explosive and propellants, the loading, assembly and packing of munitions, large quantities of contaminated wastewater, i.e. “pink water”, was disposed of into lagoons.
Problem: The water portion of these lagoons evaporated over time, leaving a heavily contaminated soil base. The level of contaminants threatened the water tables on-site.
Waste Description: Soils and lagoon sludge’s materials contaminated TNT / RDX /HDX and other explosives. Total percent explosives were as high as 41%.
Process Equipment: The system designed was a transportable direct-fired rotary kiln incinerator with a waste heat boiler and dry fabric filter scrubber system. A waste heat boiler was used reduce the gas temperature exiting the secondary combustion chamber prior to entering the dry fabric filter scrubber.
Sampling proved greater than 99.99% DRE in the kiln ash and greater than 99.9999% DRE in the fabric filter ash.
Stack sampling proved compliance with all Federal and State regulations including SO2, HCl, NOx and CO.