| 简介 |
PROBLEM TO BE SOLVED : To provide a system for treating contaminated earth and sand which efficiently utilizes carbon dioxide generated in an actual site for cleaning of contaminated earth and sand.
SOLUTION : The system for cleaning earth and sand containing volatile materials and oil as contaminants includes an earth and sand receiving part 22, an additive agent feed part 23 feeding an additive agent containing at least one of slaked lime and quick lime, a mixing part 24 mixing the earth and sand from the earth and sand receiving part 22 with the additive agent from the additive agent feed part 23, a discharge part 25 discharging the earth and sand from the mixing part 24, a power device 26 having an engine 27, a moving body 1 supporting the earth and sand receiving part 22, the additive agent feed part 23, the mixing part 24 the discharge part 25 and the power device 26, a concentrator 30 enriching the concentration of carbon dioxide of exhaust gas from the power device 26, a reaction vessel 51 making the earth and sand loaded with the additive agent react to the exhaust gas enriched in the carbon dioxide concentration in the concentrator 30, and an exhaust gas feed pipe 3 feeding the exhaust gas to the reaction vessel 51 from the concentrator 30.
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