Washing method for heavy metal contaminated soil

Abstract

The invention discloses a washing method for heavy metal contaminated soil. According to the washing method, two stages of smashing devices are arranged, collected soil is preliminarily smashed through the first-stage smashing device, and then the soil is finally smashed through the second-stage smashing device; the soil is thoroughly smashed through the two stages of smashing devices, thus, the soil and a detergent are mixed conveniently, and the washing efficiency is greatly improved; the detergent is atomized through a spray head on a washing mixing mechanism, resources are saved, resourceconsumption is reduced, the purification and washing cost is reduced, the contact area of the detergent and the smashed soil is increased, and thus the washing efficiency is improved; the soil is guided into equipment in batches through a batch loading mechanism, and thus the equipment is prevented from being blocked and damaged; meanwhile, the soil is smashed more easily and purified more easily,the purification time is shortened, and the soil washing efficiency is improved; and when the soil is guided out of the equipment through a solid-liquid separation and conveying device, water stainsand chemical agents left after washing in the soil are separated from the soil, and thus secondary pollution of the soil is avoided.

Description

technical field [0001] The invention belongs to the technical field of soil purification equipment; in particular, it relates to a method for washing heavy metal polluted soil. Background technique [0002] Soil is an important resource for human survival. At present, the soil environment problem in the world is serious. Due to the advancement of science and technology and the development of industry, the soil problem is becoming more and more serious, especially the acidification of soil, soil acidification and other trace metal elements in the soil The content far exceeds the normal value, and then soil heavy metallization occurs. At the same time, the industrial products used by human beings cause the soil to be seriously polluted by organic matter. Due to the long-term development of industry and human dependence on industrial products, trace metal elements in the soil and The high content of organic matter due to excessive deposition has made the problem of soil polluti...

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Problems solved by technology

[0002] Soil is an important resource for human survival. At present, the soil environment problem in the world is serious. Due to the advancement of science and technology and the development of industry, the soil problem is becoming more and more serious, especially the acidification of soil, soil acidification and other trace metal elements in the soil The content far exceeds the normal value, and then soil heavy metallization occurs. At the same time, the industrial products used by human beings cause the soil to be seriously polluted by organic matter. Due to the long-term development of industry and human dependence on industrial products, trace metal elements in the soil and The high content of organic matter due to excessive deposition has made the problem of soil pollution increasingly prominent. Of course, for heavy metal pollution in the soil, people can repair it through soil leaching technology, specifically by cleaning the polluted soil with water or chemical solutions An operation method to separate pollutants from the soil, but there is no effective low-cost heavy metal-contaminated soil washing equipment, so a kind of washing effect, low-cost, and easy-to-operate heavy metal-contaminated soil washing equipment appears imminent

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