Low-temperature deabsorption repairing process used for polluted soil

A polluted soil, low temperature technology, applied in the field of contaminated soil remediation, can solve the problems of high concentration of chemical remediation agents, soil secondary pollution, etc., to achieve the effect of avoiding secondary pollution, ensuring clean discharge, and saving costs

Active Publication Date: 2011-08-03
BCEG ENVIRONMENTAL REMEDIATION CO LTD
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Problems solved by technology

However, due to the high concentration of chemical remediation agents, when the soil is repaired, it is bound to remain in

Method used

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  • Low-temperature deabsorption repairing process used for polluted soil
  • Low-temperature deabsorption repairing process used for polluted soil
  • Low-temperature deabsorption repairing process used for polluted soil

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Embodiment Construction

[0018] Such as figure 1 As shown, the present invention provides a low-temperature desorption remediation process for contaminated soil. When the harmful pollutants in the soil are relatively low, the process consists of three steps: contaminated soil preparation stage, low-temperature desorption treatment stage, and tail gas treatment stage. ,

[0019] In the contaminated soil preparation stage (101): after the contaminated soil is transported to the low-temperature desorption workshop, the contaminated soil is formed into multiple strip-shaped soil piles through equipment;

[0020] In the low-temperature desorption treatment stage (102): perform intermittent turning operations on the soil piles through the soil turning equipment, so that the pollutants in the soil can be volatilized and removed, and regularly detect the turned soil;

[0021] In the tail gas treatment stage (103): the volatilized gas with pollutants is exported through the centrifugal exhaust fan, and after ...

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Abstract

The invention relates to a low-temperature deabsorption repairing process used for polluted soil, comprising three stages, namely polluted soil preparation stage, low-temperature deabsorption stage and tail gas treatment stage. In the polluted soil preparation stage, after being conveyed to a low-temperature deabsorption workshop, the polluted soil are processed into a plurality of elongated soilstacks by virtue of equipment; in the low-temperature deabsorption stage, the soil stacks are intermittently turned over by soil turning equipment to volatilize pollutants in the soil and the turned soil is detected regularly; and in the tail gas treatment stage, gas carrying the pollutants after volatilization are led out by a centrifugal exhaust fan, and the gas is dedusted by a cloth bag and absorbed by triple-effect activated carbon absorption so as to realize the clean discharge of the tail gas. In the invention, based on the characteristic that the pollutants in the soil are easy to volatilize at normal temperature, the soil is turned over to volatilize the pollutants; enforced drawing ventilation is carried out on air in an airtight workshop, the gas carrying the pollutants is dedusted and absorbed by activated carbon, and finally the pollutants in the soil are removed by deabsorption, thus effective repairing of the polluted soil is realized.

Description

technical field [0001] The invention belongs to the technical field of contaminated soil restoration, in particular to a low-temperature desorption restoration process for contaminated soil. Background technique [0002] Soil is one of the natural resources that human beings depend on for survival. With the development of industrial and agricultural production, a large number of potentially toxic pollutants enter the soil through various channels, making soil pollution more and more serious, causing many countries to face increasingly prominent soil pollution problems. In addition, soil pollution will also affect other environments. The medium also plays a role. The control and remediation of polluted soil has become a major environmental science issue in our country and even in the world. [0003] At present, the remediation technology of polluted soil mainly adopts chemical treatment method or biological treatment method. The chemical treatment method is to spray a chem...

Claims

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Application Information

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IPC IPC(8): B09C1/06B01D53/02B01D46/02
Inventor 翟立前李发生杜晓明李书鹏李瓒牛强刘鹏谭勇壁黄巍郭丽莉
Owner BCEG ENVIRONMENTAL REMEDIATION CO LTD
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