Contaminated soil cleaning - by mobile washing plant in two stacks

摘要

Soil which has been contaminated chemically or radioactively is cleaned in situ by mobile washing plant, using suitable solvents and/or binding agents for the elutriation. The process is applied in at lesast two stages, resting on balloon tyres has a cent bucket wheel to excavate the soil which is tipped on a plastic screen plate which oscillates and is made of explosion-proof plastic material. Several graded screens follow in an enclosed chamber and nozzles spray a solvent on the soil. In the second stage, the chemically cleaned soil is passed to a second separate screening system where steam or hot water remove any remnants of the solvent. Solvent and steam are extracted in containers for distillation and re-use. ADVANTAGE - Soil is returned at once to site. Much of the solvent used can be recovered.