Soil remediation system and method based on heterotopic thermal desorption

Abstract

The invention discloses a soil remediation system based on heterotopic thermal desorption. The soil remediation system comprises a polluted soil source conveying unit, a soil and stone screening unit, a stone conveying unit, a cleaning pretreatment unit, a cleaning and sediment unit, a heterotopic thermal desorption unit and a clean soil source conveying unit. According to the soil remediation system based on heterotopic thermal desorption, soil is restored more thoroughly through a peculiar smell thermal desorption and chemical cleaning combined mode, and secondary pollution is effectively reduced; disturbance of water flow in a filter screen area is guaranteed in the recovery process of a cleaning fluid recovery module, and the problem that filter screens are likely to be blocked is solved; disturbance on bottom sediments is effectively suppressed through the cleaning fluid recovery module, so that recycled cleaning fluid does not contain soil and impurities.

Description

technical field [0001] The invention relates to the field of environmental protection machinery, in particular to a soil remediation system and method based on ex-situ thermal desorption. Background technique [0002] The overall situation of China's soil environment is not optimistic. The national soil pollution rate is as high as 16.1%. While the soil environment problems of industrial and mining abandoned land are prominent, the soil environment quality of cultivated land is even more worrying. However, existing soil remediation equipment has repaired soil "sand" "The pollution is serious, and the nutrients are also filtered out. In addition, the recovery of the soil cleaning solution also has the problem of too much residual soil residue, which is easy to block the pipeline. Contents of the invention [0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a soil remediation system based on ex-situ therma...

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Problems solved by technology

[0002] The overall situation of China's soil environment is not optimistic. The national soil pollution rate is as high as 16.1%. While the soil environment problems of industrial and mining wasteland are prominent, the soil environment quality of cultivated land is even more worrying. However, existing soil remediation equipment has repaired soil "sand" "The pollution is serious, and the nutrients are also filtered out. In addition, the recovery of the soil cleaning solution also has the problem of too much residual soil residue, which is easy to block the pipeline.

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