Mixed remediation equipment for heavy metal contaminated soil and remediation and treatment method of heavy metal contaminated soil

Abstract

The invention discloses mixed remediation equipment for heavy metal contaminated soil. The mixed remediation equipment comprises a machine frame, a driving device, a soil mixing rotating cylinder, a stirring mechanism and turnover fins, wherein the soil mixing rotating cylinder is of a cylindrical structure, the soil mixing rotating cylinder is transverse arranged and erected on the machine frame,the stirring mechanism is rotationally arranged inside the soil mixing rotating cylinder in an axial direction, the plurality of turnover fins are arranged in a circular array along the circumferential contour of the inner wall of the soil mixing rotating cylinder, moreover, the length directions of the turnover fins extend in the axial direction of the soil mixing rotating cylinder, the turnoverfins are used for turning over soil particles at the bottom of the soil mixing rotating cylinder to be upwards transferred in the circumferential direction in the rotating direction of the soil mixing rotating cylinder, and the soil particles transferred by the turnover fins gradually fall off from the upper part of the stirring mechanism. The soil particles and a modifying agent can be effectively mixed by circulating overturning and transferring the soil.

Description

technical field [0001] The invention belongs to the field of soil remediation, and in particular relates to a mixed remediation equipment for heavy metal polluted soil and a method for remediation and treatment thereof. Background technique [0002] Soil pollution, as a problem that restricts the sustainable development of human society, is attracting more and more attention from all over the world. The main causes of soil pollution are excessive use of chemical fertilizers and chemical pesticides, improper disposal of various sewage, sludge and organic waste, accidental discharge of harmful substances, and long-term accumulation of various pollutants in the soil. When there are too many harmful substances in the soil and exceed the self-purification ability of the soil, the composition of the soil will change, the production of microorganisms will be inhibited, and the harmful substances will eventually be indirectly absorbed by people, endangering people's health. Soil po...

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Problems solved by technology

[0003] At present, the existing soil repair method is to use chemical modifiers or microbial agents to repair the soil. When the surface of the soil in the kettle is sprayed with a liquid improvement solution or a solid chemical modifier is added, since the modifier needs to be mixed with The soil needs to be stirred for a long time to mix the amendment with the soil evenly. This process is not only time-consuming, but the most important thing is to make the amendment fully mix with the soil particles so that the amendment can be mixed with the heavy metal elements in the soil. Neutralization reaction

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