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In-situ remediation system and remediation method for organic pollution site of light non-aqueous phase liquids (LNAPLs)

An in-situ repair and repair system technology, applied in the restoration of contaminated soil, etc., can solve the problems of large power consumption, large power consumption, and long repair period, so as to reduce consumption and modification costs, reduce separation difficulty, and reduce pollutants. The effect of high removal rate

Active Publication Date: 2016-04-27
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

[0010] Although this technology can significantly improve the repair efficiency and shorten the repair cycle; however, at present, the repair cycle of this technology is still long, and there are still problems such as large power consumption and high cost.
Since most of the areas polluted by LNAPLs are located in remote areas, the restoration of contaminated soil and groundwater in such areas requires a large power consumption due to the long restoration period

Method used

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  • In-situ remediation system and remediation method for organic pollution site of light non-aqueous phase liquids (LNAPLs)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A gas station in Jinhua City, Zhejiang Province was affected by oil pipeline leakage, and the soil was polluted by LNAPLs pollutants such as gasoline and diesel, with a soil pollution area of ​​310m 2 , the pollution depth is 13m.

[0052] The specific implementation is as follows:

[0053] (1) Set up an extraction well and a drug injection well in the polluted site, set up 8 monitoring wells within the contaminated site, and set up 6 monitoring wells around the polluted site. Among them, the diameter of the extraction well and the drug injection well is 15cm, the depth of the injection well is 11.5m, and the depth of the extraction well is 13.5m; the diameter of the monitoring well is 5cm, and the depth of the setting is 5m.

[0054] (2) Install a soil leaching repair system, and select SDBS as the enhanced leaching agent for pollutants.

[0055] (3) According to the power consumption of each equipment, the total power of the soil washing repair system is determined ...

Embodiment 2

[0058] A petrochemical plant in Nantong City, Jiangsu Province was relocated, and the soil and groundwater at the original site were polluted by oily substances (LNAPLs), namely "light oil". The detection rate of petroleum pollutants in groundwater reaches about 50%, the concentration of petroleum pollutants reaches 2.5-4.0mg / l, the pollution depth is about 7.5m, and the pollution area reaches 920m 2 .

Embodiment approach

[0059] The repair implementation plan is as follows:

[0060] (1) Carry out sampling survey on the polluted site to determine the scope and depth of site pollution and the core polluted area. The groundwater flow direction of the polluted site is from northwest to southeast. Four extraction wells and injection wells are respectively set up in the polluted site, and extraction wells are built downstream of the polluted area where groundwater flows, and injection wells are built upstream of the polluted area.

[0061] (2) Set up 15 monitoring wells within the scope of the polluted site, and set up 10 monitoring wells around the polluted site. Among them, the diameter of the extraction well and the injection well is 15cm, the depth of the injection well is 6.5m, and the depth of the extraction well is 8m; the diameter of the monitoring well is 5cm, and the depth of the installation is 7.5m.

[0062] (3) Install a soil leaching repair system, and select SDBS as the enhanced leach...

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Abstract

The invention discloses an in-situ remediation system and remediation method for an organic pollution site of light non-aqueous phase liquids (LNAPLs). The in-situ remediation system comprises a soil eluting remediation system and a solar power supply system. The soil eluting remediation system comprises a medicine storage device, a medicine injecting device, an extracting device, an eluant separating device, a groundwater processing device and an eluant recycling device. The medicine storage device is connected with the medicine injecting device, the groundwater processing device and the eluant recycling device. The extracting device is connected with the eluant separating device. The eluant separating device is connected with the groundwater processing device and the eluant recycling device. The solar power supply system comprises a solar power supply battery set, a storage battery set, a solar controller and an inverter. The in-situ remediation system is small in energy consumption, low in cost, high in pollutant removal rate, good in extract separating effect and high in recycling efficiency of groundwater and eluant.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to an in-situ restoration system and restoration method for LNAPLs organically polluted sites. Background technique [0002] At present, our country is in an important period of rapid economic development. Various industries such as chemical and petroleum development and processing are developing very rapidly. During the production, transportation, storage and use of their products, it is inevitable that leakage will occur, thus Cause soil and groundwater pollution. [0003] The pollution of ground water and soil caused by chemical spillage is becoming more and more serious. Among these chemicals are organic liquids that are immiscible with water and air—non-aqueous phase liquids, namely NAPLs (non-aqueous phase liquids). Among them, those that are lighter than water are called LNAPLs (light non-aqueous phase liquids), such as gasoline, diesel, benzene, etc.; thos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/02
CPCB09C1/00B09C1/002B09C1/02B09C2101/00
Inventor 陈昆柏温俊明金祥福段德超况武李芙荣高全喜盛浩赵怡阳伍世军
Owner 浙江博世华环保科技有限公司
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