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In-situ extraction and remediation method for polluted site

A remediation method and in-situ technology, applied in the field of contaminated site remediation engineering, can solve problems such as poor treatment effect, increased labor safety, and re-pollution, so as to speed up in-situ extraction, improve extraction and remediation effect, The effect of increasing penetration

Active Publication Date: 2015-05-20
浙江博世华环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method needs to install the explosive package in advance, which increases the labor load and has the problems of safety and re-pollution, and this method is an in-situ extraction repair method, which has a multi-phase treatment effect on the polluted gas, groundwater, oil slick, etc. in the site. bad

Method used

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  • In-situ extraction and remediation method for polluted site

Examples

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Effect test

Embodiment 1

[0042] A pilot test was carried out at a decommissioned site of a chemical plant in Zhejiang Province.

[0043] 1. Using the in-situ extraction and restoration method of the polluted site of the present invention, the specific steps are as follows:

[0044] (1) Carry out site restoration investigation and determine the test area to be 100m 2 , the main pollutants on the site are benzene series such as toluene and ethylbenzene. -7 m / s.

[0045] (2) The number of designed wells is 4, the depth of each well is 6m, and the preliminary design extraction radiation radius is 3m; according to the pollution detection data, the number and spacing of the sand layer are set, and the elevation of the sand layer is from the ground to the bottom In order: 2m, 2.5m, 3.5m, 4m, 4.5m, 5.5m, 6m.

[0046](3) The devices required for installation and connection of this method are respectively a mixing device, an injection device, an extraction device and a monitoring device, wherein the mixing d...

Embodiment 2

[0059] An organic polluted site, located in eastern Zhejiang, is a decommissioned chemical plant area. Pollution area is about 600m 2 , the soil type is sticky clay and silty clay, and the permeability coefficient is only 3×10 -8 m / s, the pollutants are mainly gasoline hydrocarbons and diesel hydrocarbons.

[0060] Through detailed investigation, it was found that the pollution depth of the site was 3-7m. The site inspection found that light non-hydrophilic phase pollutants (LNAPLs) were suspended above the groundwater level and expanded laterally, becoming LNAPLs accumulation areas or lenses. The maximum concentration of pollutants is 2000mg / kg, and the pollutant content of this site exceeds the environmental standard. Therefore, new engineering restoration measures are required to eliminate the risk of the site.

[0061] Specific steps are as follows:

[0062] (1) The number of designed wells is 6, and the preliminary design extraction radiation radius is 6m. After strat...

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Abstract

The invention discloses an in-situ extraction and remediation method for a polluted site. The method comprises the steps of inspection, well spacing and extraction, and is characterized in that after the well spacing is finished, a sand layer is formed in a soil layer cracked at the periphery of a well; the process is repeated to form a plurality of sand layers located at different heights of the well; and then pollutants are extracted. According to the in-situ extraction and remediation method, mortar mixed liquid is pumped into soil by high pressure through a cracking manner to form soil cracks and further, the sand layers are formed; and the infiltration capacity of sticky soil is increased and the in-situ extraction speed is accelerated, so that the extraction and remediation effect is improved.

Description

technical field [0001] The invention relates to the field of contaminated site restoration engineering, in particular to an in-situ extraction and repair method for contaminated sites. Background technique [0002] In the process of industrialization in China over the past 30 years, due to the lack of environmental protection awareness and the lack of relevant laws, the rough enterprise development model has caused a large area of ​​soil to be polluted across the country. According to the national soil pollution survey data recently released by the Ministry of Environmental Protection, the overall soil environment in the country is not optimistic. Some areas have serious soil pollution. In response to such phenomena, the state and relevant ministries and commissions have successively issued a number of policies, regulations and standards on soil and groundwater remediation in the past two years, bringing technical and financial support to the site remediation industry and al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 陈昆柏温俊明段德超况武何佶马嘉伟来先豪施勇琪
Owner 浙江博世华环保科技有限公司