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Radio-frequency heating vapor-extraction advanced-oxidation in-situ restoration apparatus suitable for high-viscosity contaminated soil and restoration method thereof

A contaminated soil and radio frequency heating technology, applied in the field of contaminated soil remediation, can solve the problems of long time consumption and low remediation efficiency, and achieve the effect of short remediation time, high remediation efficiency, and real-time and accurate temperature control

Inactive Publication Date: 2014-03-12
SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to: provide a kind of radio frequency heating gas-phase pumping advanced oxidation in-situ repairing device and repairing method suitable for highly viscous polluted soil of volatile and semi-volatile organic matter, to solve the problem of volatile and semi-volatile organic matter in the prior art Technical problems of low remediation efficiency and time-consuming during the treatment of highly viscous organic contaminated soil

Method used

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  • Radio-frequency heating vapor-extraction advanced-oxidation in-situ restoration apparatus suitable for high-viscosity contaminated soil and restoration method thereof
  • Radio-frequency heating vapor-extraction advanced-oxidation in-situ restoration apparatus suitable for high-viscosity contaminated soil and restoration method thereof
  • Radio-frequency heating vapor-extraction advanced-oxidation in-situ restoration apparatus suitable for high-viscosity contaminated soil and restoration method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] Such as figure 1 Shown in -4, a kind of radio frequency heating gas phase extraction advanced oxidation in-situ restoration device applicable to highly viscous polluted soil of the present invention, it comprises injection pipe 10 and heating extractor 9 arranged by regular hexagon (heating extraction There are seven devices 9, which are distributed on six points and the central point of the regular hexagon; there are six injection pipes 10, which are distributed in the centers of six triangles formed by connecting the diagonals of the regular hexagon); each heating pump The extractor includes an extraction tube 6 and a heating tube 1 arranged in the extraction tube. The radio frequency electrode 5 is placed in the heating tube 1. The radio frequency electrode is connected to the matching device 3 through the coaxial cable 4, and the matching device 3 is connected to the matching device through the coaxial cable 4. The radio frequency transmitter 2 is connected; there a...

Embodiment 2

[0031] In the present invention, the application of "a radio frequency heating gas phase pumping advanced oxidation in-situ repair device suitable for highly viscous polluted soil" in repairing highly viscous soil polluted by volatile and semi-volatile organic compounds in a chemical plant in Caolu Town

[0032] Caolu Base is located in Caolu Town, Pudong New District, Shanghai, with Lingkong Road in the east, Jinhai Road in the south, Pudong Canal in the west, and Dongjing Road in the north (see diagram 2-1 ).

[0033] The investigation found that there was a former Gulu chemical plant within the base. The plot of the chemical plant is in an "L" shape, about 160m long from east to west, about 105m wide in the east, and about 69m wide in the west, covering an area of ​​about 13,445m 2 . The polluted area is about 4513 square meters.

[0034] The fix is ​​as follows:

[0035] (1) According to the specific conditions of the contaminated soil site, arrange multiple heating e...

Embodiment 3-14

[0048] The polluted site, remediation device, and remediation method are basically the same as in Example 2, but the specific operating conditions are different.

[0049] The specific operating conditions and experimental results are shown in Table 3.

[0050] Table 3 Changes of benzene concentration at sampling points before and after experimental treatment under different operating conditions (mg / Kg)

[0051]

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Abstract

The invention discloses a radio-frequency heating vapor-extraction advanced-oxidation in-situ restoration apparatus suitable for high-viscosity contaminated soil and a restoration method thereof. The apparatus comprises multiple heating extractors and injection pipes; each heating extractor comprises an extraction pipe and a heating pipe; a radio-frequency electrode is arranged in the heating pipe and is connected with an adapter and a radio-frequency launcher; the outer shell of the extraction pipe is provided with a hole; the inner wall of the extraction pipe is provided with grids; the upper parts of all of the extraction pipes are connected together and connected with a condensation unit, a gas-liquid separator and a vacuum pump in sequence. The restoration method comprises: arranging the multiple heating extractors and the injection pipes, and keeping the distance between per two heating extractors at 2-5 m; respectively injecting calcium carbonate powder with an addition amount of 10%-15% and a sodium persulfate solution with an addition amount 20%-25% into the contaminated soil; and performing intermittent extraction with a heating temperature of 100-500 DEG C and a heating time of 100-140 h. According to the technical scheme, the restoration effect on the high-viscosity contaminated soil is obvious in a short time, the pollutant removing rate is high, the heating is rapid, the restoration time is short and the restoration efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of contaminated soil remediation, and relates to a radio frequency heating gas phase pumping advanced oxidation in-situ repair device, a repair method and a repair material suitable for volatile and semi-volatile organic highly viscous polluted soil. Background technique [0002] Volatile organic compounds and semi-volatile organic compounds in highly viscous soil have the characteristics of long half-life, strong adsorption capacity and difficult treatment. They have different pollution characteristics and harmfulness from other pollutants. They are listed as potentially dangerous in the environment and should be prioritized. Controlled toxic pollutants. Such pollutants will threaten the water quality of groundwater sources, pollute the air, change soil properties, and endanger crops. At the same time, accumulation of hydrocarbon gas underground in buildings may cause explosions and accelerate the aging of ...

Claims

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Application Information

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IPC IPC(8): B09C1/06B09C1/08
Inventor 罗启仕朱杰喻恺李炳智孟梁张长波
Owner SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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