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System for restoring organic contaminated soil through in-situ electrical heating and treatment method

A technology of organic pollution and polluted soil, applied in the field of soil remediation, can solve the problems of lack of systematic and holistic consideration, stay, and low practical application level of contaminated land restoration projects, and achieve scientific and reasonable layout methods

Active Publication Date: 2018-07-24
BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, it can be seen that most of the patents currently applied in China are still in the theoretical design stage, lacking the support of design parameters in engineering implementation, and lacking systematic and holistic considerations. High, low technology conversion rate

Method used

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  • System for restoring organic contaminated soil through in-situ electrical heating and treatment method
  • System for restoring organic contaminated soil through in-situ electrical heating and treatment method
  • System for restoring organic contaminated soil through in-situ electrical heating and treatment method

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Effect test

Embodiment 1

[0061] 1) A percussion drill or an auger can be used to carry out drilling construction at a designated location in the polluted site, and bury the electric heating tube 9 and the extraction tube 12 to the corresponding depth. The electric heating tubes 9 are arranged in a triangular shape, and the extraction tube 12 and the electric heating tubes 9 are installed nearby; an insulating layer 14 is laid on the surface of the polluted area to prevent heat loss.

[0062] 2) There is a metal resistance element in the electric heating tube 9, and a ceramic sleeve is used to protect the contact between the heating element and the stainless steel shell 11. When the current passes, the resistance element starts to generate heat, and conducts heat radiation with the stainless steel shell 11 process, and then conduct heat conduction to the surrounding soil;

[0063] 3) The extraction pipe 12 is usually made of 1-inch or 2-inch carbon steel pipes, and horizontal slits are made within the ...

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Abstract

The invention provides a system for restoring organic contaminated soil through in-situ electrical heating. The system comprises an infrastructure technology, an electronic control system, a gas treatment system, a monitoring and data acquisition system and a repairing effect comprehensive assessment system. The infrastructure technology comprises heating well and extraction well construction, ground compaction and insulating layer construction technologies; heating wells are distributed on a contaminated site according to a triangle arrangement principle and a proximity principle, and the extraction well is arranged in the geometric center of the layout of the heating well; the gas treatment system is composed of a pre-cooling adsorption sledge, an extraction sledge and a treatment sledge, and is used for completing gas extraction and treatment and achieving the tail gas discharging requirement; and the repairing effect comprehensive assessment system evaluates the temperature risingeffect of the contaminated soil in the restoring process and the treatment effect of the contaminated soil. According to the system, the technological route is complete, the soil property applicability is wide, the heating temperature can reach 500 DEG C or above, and volatile and difficult-to-volatilize organic contaminant can be treated at the same time.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a system and a treatment method for in-situ electric heating to remediate organic polluted soil. Background technique [0002] Organic contaminated soil remediation technology is divided into ex-situ remediation technology and in-situ remediation technology. Ex-situ remediation technology refers to soil remediation technology in which contaminated soil is excavated or extracted from the original location where the contamination occurred on the site, and then transported or transferred to other places or locations for treatment and restoration. Ex-situ restoration technology is popular in my country because of its short restoration period, does not affect the development of the original land, and the conditions during the treatment process are easy to control. In areas with deep pollution that are difficult to treat, the in-situ remediation technology has shown more and m...

Claims

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Application Information

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IPC IPC(8): B09C1/06B08B15/04B01D50/00B01D53/04
CPCB01D50/00B01D53/04B08B15/04B09C1/062B09C2101/00
Inventor 王世杰岳勇舒振国杨振
Owner BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION
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