Mobile soil washing apparatus and method thereof

Abstract

The invention discloses a mobile soil washing apparatus and a method thereof, which relate to the technical field of environment protection. The mobile soil washing apparatus mainly comprises a double-deck vibrating sieve combination device for the purpose of wet type soil sieving, a mobile washing device for washing sieved soil, a mobile wastewater treatment device for treating a washing solution (which can be replaced by a temporary civil sewage treatment facility), and a gas extracting and activated carbon adsorption device for extracting gas generated in a washing process, wherein a small-sized belt conveyor is used for conveying the sieved soil between the vibrating sieve combination device and the washing device. By virtue of the soil washing apparatus, flexible apparatus assembly and washing treatment can be carried out on the soil or bottom mud containing various pollutants in different occasions, and innovative optimization is carried out on a traditional soil washing process from the perspective of resource recovery according to different distributions of the pollutants in soil with different particle size ranges.

Description

Technical field: [0001] The invention relates to the technical field of environmental protection, in particular to a mobile soil washing equipment device and a method thereof. Background technique: [0002] With the rapid development of industry, soil pollution has become increasingly serious and has become a global environmental problem. Soil pollution comes from a wide range of sources, including pollution emissions from mining, metallurgy, chemical, pharmaceutical, food and other industries, as well as the application of pesticides and fertilizers, etc. Soil pollution, especially heavy metal and organic pollution is concealed, long-term and irreversible, directly or indirectly pollutes groundwater and air, endangers crops and organisms, and even endangers human health and life. Therefore, remediation of heavy metal and organic pollution Soil, restoring the original function of soil has always been a hot and difficult issue both at home and abroad. [0003] At present, ph...

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Problems solved by technology

[0004] Soil washing is the use of water or chemical solvents or other fluids that may wash pollutants out of the soil (light soil or sandy soil), and may even be gas, to flush the soil, through ion exchange, precipitation, adsorption and sequestration Combined effect, the heavy metal or organic matter in the soil solid phase is transferred to the soil liquid phase, and then the eluate containing heavy metal or organic matter is further treated, and the eluate is circulated. The soil leaching process includes the eluate to the soil surface Diffusion, dissolution of pollutants, diffusion of leached pollutants inside the soil, diffusion of leached pollutants from the soil surface to the fluid, etc. Soil leaching can be divided into in-situ leaching restoration and ex-situ leaching according to the site. Leaching restoration, among them, soil in-situ chemical leaching restoration is mainly based on the distribution characteristics of pollutants, using external force or the gravity of the eluent itself to make it flow through the contaminated soil, and using extraction wells or artificial ditches to collect and eliminate leaching. In the process of washing liquid, in-situ chemical leaching repair needs to establish a rinsing device in the contaminated area, and usually use physical barriers such as partition walls to seal the polluted area, and the leachate usually needs to be collected for harmless treatment. The method is limited by the site conditions, the process is complicated, and the practicability is poor; the traditional ectopic chemical leaching repair of soil needs to go through the following steps: (1) Excavation and migration of contaminated soil; (2) Contaminated soil in the leaching device (3) Harmless treatment of pollutants in the leachate; (4) Backfilling of the treated soil, etc., which involves complex processes, large engineering quantities, expensive equipment, and poor practicability

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