Method for cleaning land polluted by heavy metal

Abstract

The invention relates to the field of polluted land restoration and particularly discloses a method for cleaning land polluted by heavy metal. A land cleaning device is adopted for cleaning. The landcleaning device comprises a vehicle frame, a feeding mechanism and a cleaning mechanism. The vehicle frame is provided with vehicle wheels. A first motor is fixed to the vehicle frame. The feeding mechanism comprises a cutter and a first conveying belt. The cleaning mechanism comprises a second motor, a cleaning tank, a crank and a pull rod, and the crank, the pull rod and the cleaning tank form acrank slide block mechanism. The cleaning tank is internally provided with a stirring mechanism. The stirring mechanism comprises a screw rod, multiple stirring assemblies and limiting components. Each stirring assembly comprises an inner barrel, a one-way bearing and a rotating disc. Multiple rolling balls are arranged between each inner barrel and the screw rod. Each limiting component abuts against the outer wall of the corresponding rotating disc. A discharging barrel is fixed to each rotating disc. Water outlets are formed in each discharging barrel. The vehicle frame is provided with asecond conveying belt. The cleaning method comprises the steps of 1, material blending; 2, cleaning; 3, inspection; and 4, re-cleaning. By means of the method for cleaning the land polluted by the heavy metal, the land polluted by the heavy metal can be cleaned.

Description

technical field [0001] The invention relates to the field of restoration of polluted land, in particular to a physical restoration method for land polluted by heavy metals. Background technique [0002] Heavy metals refer to elements with a density of more than five grams per cubic centimeter, such as aluminum, lead, iron, tin, mercury, etc. Because the metal ions of heavy metals carry more electrons, they can form strong and stable bonds and bind to proteins in the human body It is not easy to be eliminated by metabolism, so it will affect the body's metabolic operation. Due to industrial and waste battery pollution, heavy metals cannot be biodegraded and will pollute the soil when they enter the soil. Plants growing on this soil will contain excessive heavy metals, which will seriously endanger human health after eating, so this kind of soil cannot be planted. Edible plants; and when there are too many heavy metals in the soil, plants cannot grow on the soil, which will c...

AI Technical Summary

Problems solved by technology

During the whole process, it is necessary to continuously transport the contaminated soil to the cleaning tank, and then transport the cleaned soil back for backfilling. The workload of the workers is heavy, and it takes a long time to transport the soil, and the efficiency of soil treatment is low.

Secondly, after standing for a certain period of time, the soil in the mud will be separated from the solution before it can be backfilled, which takes a long time and further reduces the cleaning efficiency

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