Ectopic leaching and screening interlock control system of soil and leaching screening method of system

Abstract

The invention relates to an ectopic leaching and screening interlock control system of soil and a leaching and screening method of the system. The system comprises a leaching device, a screening device and a frequency-variable spray pipeline, wherein the leaching device comprises a leaching roller, a material transmission device and a speed adjustment driving device; the leaching roller is connected with the speed adjustment driving device; the material transmission device is arranged in the leaching roller; the screening device is connected with an outlet end of the leaching roller; and the frequency-variable spray pipeline is arranged in the leaching device. The leaching and screening method comprises the steps of: (1) scattering and feeding the soil, (2) leaching the soil, (3) performing screening, (4) reversely rotating the leaching roller to prolong stirring and leaching time of materials, and (5) starting chemical leaching via the frequency-variable spray pipeline, or performing the chemical leaching and clear water leaching alternately. The precise leaching is achieved; the energy is saved; screen hole blocking is effectively avoided; the leaching efficiency is improved; the leaching and separating of soil components in different particle sizes and with different heavy metal contents are achieved; and the purpose of soil sorting treatment is achieved.

Description

technical field [0001] The invention relates to a leaching system used for soil treatment and restoration polluted by heavy metals, nutrient elements, refractory organic matter, etc., and belongs to the technical field of soil leaching. Background technique [0002] Soil is a layer of loose material on the surface of the earth, minerals, animals and plants formed by the weathering of rocks, organic matter produced by the decomposition of microbial residues, soil organisms (solid phase substances) and water (liquid phase substances), air (gas phase substances) Substances), oxidized humus, etc., can grow plants. Soil particles bond to each other through different accumulation methods to form soil structure. In addition to sandy soil, soil particles are aggregated together in the form of soil structure under natural conditions, and the influence of soil texture on soil production properties is also expressed through soil structure. The types of soil structure are sheet, block...

AI Technical Summary

Problems solved by technology

Although this system fully considers the difficulty of technical implementation of heavy metal-contaminated soil with a large proportion of sand and gravel, and clarifies the distribution characteristics of pollutants in different particle sizes and the process of leaching, it does not fully consider the difference between soil and soil moisture content. , especially the characteristics of high gravel content and mutual adhesion of large and small particles caused by improper disposal of construction waste during the construction of polluted sites

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