Movable device and movable method for leaching composite polluted soil

Abstract

The invention discloses a movable device and a movable method for leaching composite polluted soil. The device comprises a box body, and a multilevel screening leaching system, a fine particle stirring cleaning system, a coarse particle cyclone cleaning system and a large particle spiral cleaning system, which are arranged in the box body, wherein an inlet of the multilevel screening leaching system is provided with a pretreatment screening crushing device and a control device. By adopting the multilevel screening leaching system, the soil to be leached can be screened into soil particles in different particle sizes in a wet screening way, and pollutants in the soil in different particle sizes can be removed in a corresponding cleaning way. Since all systems are uniformly arranged in the box body, convenience in movement can be realized, the occupied floor area is small, and the device can be conveniently used for treating the polluted field in a small scale; the system screens the soil particles in different particle sizes, and the pollutants in the soil are respectively treated according to the distribution of the pollutants in different particle sizes, so that the treatment efficiency is improved, the treatment cost is reduced, and the adaptability to the composite polluted soil can be satisfied.

Description

technical field [0001] The invention relates to the field of soil remediation of polluted sites, in particular to a movable device and method for rinsing composite polluted soil. Background technique [0002] Soil washing is to use water or chemical solvents (including acid, alkali, surfactant or chelating agent, etc.) The recovered soil is recovered or disposed of, and the liquid phase containing pollutants is recovered or discharged after being treated up to the standard. This technology has a wide range of applications and can repair inorganic or organic pollutants such as heavy metals, radionuclides, cyanides, polycyclic aromatic hydrocarbons, pesticides, and polychlorinated biphenyls. Leaching techniques are suitable for remediation when the sandy content of the contaminated soil is greater than 50%, while leaching techniques are not cost-effective when the silt (fine silt / clay) content exceeds 30%. Under normal circumstances, the soil leaching process can only have g...

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Problems solved by technology

[0003] The traditional soil leaching process currently has at least the following problems: 1) The leaching process is cumbersome, and the complete set of equipment is relatively large, which is not economically beneficial for sites with a scale of less than 5,000 tons of polluted soil; 2) It is mostly used to treat soil with a single type of pollutant. For the remediation of compound polluted soil, such as soil polluted by heavy metals and organic matter, there are certain limitations; 3) The amount of engineering work, water demand and chemical consumption in the treatment process are huge, and the cost is high

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