The invention relates to an ex-situ leaching remediation device suitable for remediation of cohesive soil
pollution and a remediation method. The ex-situ leaching remediation device comprises a soil particle size grading and pulping unit, a leaching and
dewatering unit, a
wastewater treatment unit, a
sludge treatment unit, an auxiliary
constant pressure water supply unit and an auxiliary medicament allocation unit, wherein the soil particle size grading and pulping unit is composed of a wet
crusher, a
slurry collecting tank, a roller mud decomposing
machine, a wet vibrating screen, a liquid collecting tank and the like, and the leaching and
dewatering unit is composed of a leaching tank, a
slurry concentration basin, a centrifugal dehydrator and the like; and the
wastewater treatment unitis composed of a
wastewater reaction combination tank, a wastewater
sedimentation tank and the like, and the
sludge treatment unit is composed of a
sludge storage basin, a
filter press and the like. The remediation method comprises the steps of crushing, pulping, screening, leaching, concentration,
dehydration, and matching steps of wastewater treatment, sludge treatment,
water supply, dosing andthe like. The ex-situ leaching remediation device and the remediation method are mainly suitable for the remediation of various heavy
metal, organic or compound
polluted soils including cohesive soils, and have the advantages of wide application range, stable remediation effect, simple operation and running, high wastewater recycling rate and the like.