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Movable in-situ heat strengthened soil gas phase extracting device and method

A technology of gas-phase extraction and extraction device, which is applied in the field of movable in-situ heat-enhanced soil gas-phase extraction device, can solve the problems of low efficiency, difficulty in completely removing pollutants, long repair period, etc., and achieves easy removal and improved The effect of repair efficiency and shorten repair cycle

Pending Publication Date: 2017-12-12
爱土工程环境科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a mobile in-situ heat-enhanced soil gas phase extraction device and method to alleviate the low efficiency, long repair period and Technical problems that are difficult to completely remove pollutants

Method used

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  • Movable in-situ heat strengthened soil gas phase extracting device and method
  • Movable in-situ heat strengthened soil gas phase extracting device and method
  • Movable in-situ heat strengthened soil gas phase extracting device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0070] This example provides a mobile in-situ heat-enhanced soil gas phase extraction device, please refer to Figure 1 to Figure 5 , including a soil thermal treatment system 100.

[0071] The soil heat treatment system 100 comprises at least one extraction well 110 and a plurality of heating wells 120, the heating wells 120 are arranged around the extraction well 110, and the plurality of heating wells 120 form a regular polygonal structure, the heating wells 120 are located at the vertices of the regular polygon, and the extraction Well 110 is located at the center of the regular polygon.

[0072] Since the mobile in-situ thermally enhanced soil gas phase extraction device provided by the present invention includes at least one extraction well 110 and a plurality of heating wells 120, the heating wells 120 are arranged around the extraction well 110, and the plurality of heating wells 120 form a regular polygon structure, the heating well 120 is located at the vertices of ...

Embodiment 2

[0084] This embodiment provides a mobile in-situ heat-enhanced soil gas phase extraction method, including:

[0085] Soil heat treatment process: the heating well 120 heats the polluted soil to a specified temperature to volatilize or desorb organic pollutants in the soil; the organic waste gas in the extraction well 110 is extracted to the ground, and a vacuum is formed in the extraction well 110, and the surrounding soil Organic pollutants migrate to the extraction well 110;

[0086] Catalytic oxidation process: the extracted waste gas passes through the vacuum blower 211 to the cyclone dust collector 212 to remove dust. After dust removal, the gas enters the catalytic oxidizer 213 for catalytic oxidation of organic pollutants. After catalytic oxidation, the gas enters the heat exchanger 214 to cool, and passes through the gas Liquid separator 215 separates tail gas and oil-water mixture;

[0087] Tail gas treatment process: the tail gas after gas-liquid separation enters t...

Embodiment approach 1

[0091] The object of this embodiment is a petroleum hydrocarbon-contaminated site. According to the site environmental investigation results, the concentration of petroleum hydrocarbons (C16) is 624~19894mg / kg. The maximum pollution depth is 7 meters, the area of ​​pollution area is 680m 2 , the site contaminated soil remediation target value is total petroleum hydrocarbon (C16)<10000mg / kg. The method of remediation of the contaminated site is as follows:

[0092] The heating well 120 on this site adopts the resistance heating well 1-1. Firstly, the influence radius of the heating well 120 and the extraction well 110 is determined through the on-site experimental test, and the soil heat treatment system 100 is established according to the influence radius. The influence radius of the extraction well 110 is 6 meters, and the influence radius of the heater well 120 is 5.5 meters. The heater well 120 is selected to be set at the vertices of an equilateral triangle, and the side ...

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Abstract

The invention relates to the technical field of contaminated land remediation, in particular to a movable in-situ heat strengthened soil gas phase extracting device and a movable in-situ heat strengthened soil gas phase extracting method, and aims to solve the technical problems of low efficiency, long remediation period and difficulty in thoroughly removing pollutants caused by adopting normal temperature gas phase extracting in a soil gas phase extracting technology in the prior art. The movable in-situ heat strengthened soil gas phase extracting device comprises a soil heat treatment system; the soil heat treatment system comprises a plurality of work units; each work unit comprises at least one extracting well and a plurality of heating wells; the heating wells are distributed along the extracting well; the plurality of the heating wells form a regular polygon structure; the heating wells are positioned at the vertexes of a regular polygon; the extracting well is positioned in the centre of the regular polygon. According to the technical scheme adopted by the invention, the remediation efficiency can be improved remarkably, the remediation period is short, and the pollutants are removed easily.

Description

technical field [0001] The invention relates to the technical field of contaminated site restoration, in particular to a movable in-situ heat-enhanced soil gas phase extraction device and method. Background technique [0002] Soil gas phase extraction technology is one of the main remediation methods recommended by the United States for volatile organic compound-contaminated sites, and it is listed as a "revolutionary technology" by the US Environmental Protection Agency (EPA) because of its effectiveness and extensiveness in the treatment of volatile-contaminated sites. . [0003] Soil gas phase extraction technology is to use vertical or horizontal wells to extract soil air to cause pressure gradient changes in contaminated soil, thereby enhancing the volatilization of non-aqueous liquids in the soil and pollutants dissolved in interstitial water, and increasing the desorption rate of pollutants on the soil surface. Improvement, volatile organic pollutants are extracted t...

Claims

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Application Information

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IPC IPC(8): B09C1/06B09C1/00B01D50/00B01D53/86B01D53/44C02F9/04B01D53/04B01D53/14
CPCB01D53/04B01D53/1456B01D53/8687C02F9/00B09C1/005B09C1/06B09C1/062C02F2001/007C02F1/722C02F1/66C02F2305/026C02F1/001B01D2259/4009B09C2101/00B01D50/20
Inventor 李银光周愈尧陈一文罗海兰郭小伟周旭峰曹强
Owner 爱土工程环境科技有限公司
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