Method for washing, desorption and densification treatment of soil slurry

Abstract

The invention relates to a cyclone type soil washing method with undercurrents connected in series. The cyclone type soil washing method with the undercurrents connected in series comprises the steps that screened micro soil particle suspension liquid is stirred and washed; the micro soil particle suspension liquid flows through two or multiple segments of hydrocyclones with the undercurrents connected in series, and a solid-liquid mixer group is installed in front of a cyclone system, so that the purposes of enhancing desorption of small-particle-size cohesive soil pollutants in the soil slurry, improving the desorption capacity and conducting densification on the undercurrents are achieved; and in each segment, corresponding structures are designed according to actual working conditions to achieve the best operation condition so that cost can be lowered, and efficiency can be improved. By the adoption of the cyclone type soil washing method with the undercurrents connected in series, deep separation between waste water and large-particle soil in the soil slurry is achieved, and the purpose of recycling detergent is achieved; and device parameters can be adjusted and optimized according to actual conditions, pollutants containing heavy metal, organic matter and the like are effectively eliminated, and the defects of existing methods for soil washing, desorption and densification are overcome.

Description

technical field [0001] The invention relates to a method for washing, desorbing, and thickening treatment of soil slurry, which belongs to the field of ectopic restoration of polluted soil. Background technique [0002] Soil is an important part of the ecological environment. With the vigorous promotion of the government and environmentalists, the importance of soil pollution restoration has become increasingly prominent. There are many reasons for the deterioration of the soil environment, such as: pollution caused by agricultural production, transportation and storage; pollution caused by oil production, storage and transportation, gas station leakage; pollution of production sites in the steel coking industry; chromium salts, rare metals , pollution caused by heavy metal production and so on. The polluted soil will seep into the ground, spread the pollution plume through the groundwater, cause secondary pollution, and then enrich and enter the human body through the soil...

AI Technical Summary

Problems solved by technology

[0005] For a common single cyclone, one separation process may not be able to achieve sufficient separation, desorption and concentration of the slurry

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