Device and method for remediation of soil in site polluted by organochlorine pesticides

A pesticide pollution and soil remediation technology, applied in the field of organochlorine pesticide-contaminated soil remediation, can solve the problems of low treatment efficiency, rough soil treatment, and carelessness, etc., and achieve high remediation efficiency, efficient remediation, and improved removal rate.

Active Publication Date: 2021-06-22
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention provides a device and method for soil remediation of organochlorine pesticide-contaminated sites. The device and method can solve the above-mentioned problems of rough, unrefined soil treatment and low treatment efficiency.

Method used

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  • Device and method for remediation of soil in site polluted by organochlorine pesticides
  • Device and method for remediation of soil in site polluted by organochlorine pesticides
  • Device and method for remediation of soil in site polluted by organochlorine pesticides

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Embodiment 1: as figure 1 A device for soil remediation of organochlorine pesticide-contaminated sites is shown, including a feeding module 1 for pretreatment of the soil in the remediation area, a screening module 2 connected to the feeding module 1, and a screening module 2 connected to the A composite remediation system 3 for remediating soil, and an eluent treatment system 4 connected to the composite remediation system 3;

[0040] The composite repair system 3 includes a first repair device that uses dry atomization elution to complete soil repair, and is connected with the first repair device to use steam thermal desorption to repair soil;

[0041] Such as figure 2 As shown, the first repair device includes a drying cylinder 30 connected to the screening module 2, a counter mixer 32 whose upper end is connected to the drying cylinder 30 through a first pipeline, and a negative pressure at the connection between the drying cylinder 30 and the counter mixer 32. V...

Embodiment 2

[0055] Embodiment 2: what this embodiment records is the method for utilizing the device described in embodiment 1 to carry out organochlorine pesticide-contaminated site soil remediation, specifically comprising:

[0056] Step 1: Feed crushing

[0057] Put the polluted soil into the feeding bin 11 first, and carry out the crushing process through the crushing assembly 12 until the polluted soil passes through a screen with an aperture of 10 cm;

[0058] Step 2: Multi-stage screening and cleaning

[0059] The vibrating screening assembly 21 of the screening module 2 is used to sieve the polluted soil treated in step 1: firstly, use a sieve with an aperture of 9 mm for the first screening, and then use a sieve with an aperture of 2 mm for the second screening ;Get soil particles smaller than 2mm;

[0060] The stone coarse material retained in the first screening is washed by the stone washing device 23 for 10 minutes, then aired and backfilled; at the same time, the sand and ...

Embodiment 3

[0066] Embodiment 3: different from embodiment 2, a kind of method for organochlorine pesticide contaminated site soil remediation, specifically comprises:

[0067] Step 1: Feed crushing

[0068] First put the polluted soil into the feeding bin 11, and then crush it through the crushing assembly 12 until the polluted soil passes through a screen with an aperture of 12 cm;

[0069] Step 2: Multi-stage screening and cleaning

[0070] The contaminated soil treated in step 1 is screened by the vibrating screening assembly 21 of the screening module 2: firstly use a screen with an aperture of 10mm for the first screening, and then use a screen with an aperture of 3mm for the second screening ;Get soil particles smaller than 3mm;

[0071] The stone coarse material retained in the first screening is washed by the stone washing device 23 for 20 minutes, then aired and backfilled; at the same time, the sand and gravel retained by the second screening are washed by the sand washing de...

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Abstract

The invention relates to the technical field of remediation of soil polluted by organochlorine pesticides, and particularly discloses a device and a method for remediation of soil in a site polluted by organochlorine pesticides. The device comprises a feeding module used for pretreating soil in a remediation area, a screening module connected with the feeding module, a composite remediation system connected with the screening module and used for remediating the soil, and an eluent treatment system connected with the composite remediation system. The method comprises the following steps: crushing the polluted soil, carrying out multi-stage screening, and then carrying out composite synergistic remediation treatment of atomization elution, spray elution and steam thermal desorption on obtained soil particles; by means of the device, composite efficient remediation of the contaminated soil can be completed, and remote treatment is not needed; by means of the method, the organochlorine-containing polluted land can be rapidly repaired, and the method is suitable for large-scale popularization.

Description

technical field [0001] The invention relates to the technical field of remediation of organochlorine pesticide-contaminated soil, in particular to a device and a remediation method for soil remediation of organochlorine pesticide-contaminated sites Background technique [0002] With the development of my country's industrialization and urbanization, a large number of organochlorine pesticide production enterprises that have been closed or to be closed and relocated have emerged in recent years. According to incomplete statistics, there are hundreds of sites polluted by organochlorine pesticides (DDT, HCH, chlordane, mirex, etc.) across the country. Because organochlorine pesticides have "three causes" effects, stable structure, high toxicity, and difficult to decompose in soil, their natural degradation time is as long as several years to decades. Compared with general chemical pollution sites, they have long-lasting, Sites with high pollution hazards, high risks to human h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/02B09C1/06B07B1/28
CPCB09C1/00B09C1/02B09C1/065B07B1/28
Inventor 周艳张胜田万金忠邓绍坡范婷婷李群赵远超王祥靳德成
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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