Device and process for removing organic pollutants from soil and underground water in situ

Abstract

The invention relates to a device for removing organic pollutants from soil and underground water in situ. The device is characterized by comprising an outer metal pipe (1) and a central metal pipe (2) which are vertically arranged, wherein the tops of the outer metal pipe (1) and the central metal pipe (2) are communicated with a detection ignition device (3); the central metal pipe (2) is communicated with an air inlet pipe (4) at the upper part of soil; the central metal pipe (2) is communicated with a plastic sieving pipe (5) at the lower part of the soil; the outer metal pipe (1) is communicated with an exhausting pipe (6) at the upper part of the soil; and the soil above the outer metal pipe (1) and the central metal pipe (2) is provided with a heat insulation device (7). The device for removing the organic pollutants from soil and underground water in situ has a simple structure and is convenient to set, and is applicable to repairing of almost organic polluted soil and underground water; the device is not influenced by soil properties and underground water distribution; and the pollutants are completely decomposed by the device, secondary pollution is not generated, the management time is short and the repairing cost is acceptable.

Description

technical field [0001] The invention relates to an in-situ device for removing organic pollutants in soil and groundwater and a process thereof, which is used in the soil and groundwater restoration industry, and is a method for efficiently heating soil and groundwater so that various organic pollutants in soil and groundwater can pass through, Devices for removal by evaporation, steam desorption, hydrolysis, oxidation or pyrolysis. Background technique [0002] Organic pollutants refer to pollutants composed of natural organic substances in the form of carbohydrates, proteins, amino acids, and fats, and some other biodegradable synthetic organic substances. If organic pollutants are not treated, they will cause environmental damage. big influence. [0003] The conventional treatment method for organic pollutants is to directly heat the soil and groundwater polluted by organic matter, so that the organic pollutants in the soil and groundwater can be evaporated or desorbed. ...

AI Technical Summary

Problems solved by technology

[0003] The conventional treatment method for organic pollutants is to directly heat the soil and groundwater contaminated by organic matter, so that the organic pollutants in the soil and groundwater can be evaporated or desorbed. However, the common heating method is limited by the cost and the resources around the site. At the same time, the organic waste gas that is heated, evaporated or desorbed requires subsequent treatment, and the pollutants cannot be completely decomposed, which is prone to secondary pollution and takes a long time to treat.

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