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Soil washing equipment and method for remediation of heavy metal polluted soil

A technology of contaminated soil and soil leaching, which is applied in the direction of restoration of contaminated soil, separation methods, chemical instruments and methods, etc., can solve the problems of complex ex-situ treatment procedures, large floor space, and high treatment costs, and avoid transportation Difficulty, reduction in processing costs, and reduction in processing steps

Active Publication Date: 2022-04-05
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

[0005] The technical problem solved by the present invention is: in the prior art, the treatment equipment for leaching treatment of heavy metal-contaminated soil occupies a large area, the ex-situ treatment process is complicated, and the treatment cost is high

Method used

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  • Soil washing equipment and method for remediation of heavy metal polluted soil
  • Soil washing equipment and method for remediation of heavy metal polluted soil
  • Soil washing equipment and method for remediation of heavy metal polluted soil

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Experimental program
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Effect test

Embodiment 1

[0043] Such as figure 1The shown soil washing equipment for remediation of heavy metal-contaminated soil includes a movable chassis 1, a soil-taking unit 2 arranged at the front end of the movable chassis 1, arranged in the middle of the movable chassis 1 and communicated with the soil-taking unit 2 The rinsing unit 3 is arranged on the rear end of the movable chassis 1 and the drainage unit 5 is communicated with the rinsing unit 3, and the eluent supply unit 4 is arranged on the movable chassis 1 and communicated with the rinsing unit 3;

[0044] Such as figure 2 As shown, the soil fetching unit 2 includes an elevating guide rail 20 vertically arranged at the front end of the movable chassis 1, a soil crushing assembly 21 movably arranged on the elevating guide rail 20, an earth entry part 22 that can be in contact with the soil, and is connected with the soil entry part 22, The screw feeding roller group 23 of the soil crushing assembly 21;

[0045] Such as image 3 As ...

Embodiment 2

[0067] A soil rinsing device for remediation of heavy metal-contaminated soil, comprising a movable chassis 1, a soil-taking unit 2 arranged at the front end of the movable chassis 1, and a leaching unit arranged in the middle of the movable chassis 1 and connected to the soil-taking unit 2 Unit 3, a filter and soil drainage unit 5 arranged on the rear end of the movable chassis 1 and connected to the washing unit 3, and a eluent supply unit 4 arranged on the movable chassis 1 and connected to the washing unit 3;

[0068] The soil fetching unit 2 includes a lift guide rail 20 vertically arranged on the front end of the movable chassis 1, a soil crushing assembly 21 movably arranged on the lift guide rail 20, a soil entry piece 22 that can be in contact with the soil, and is connected to the soil entry piece 22 and the soil crushing assembly. 21 screw feeding roller group 23;

[0069] The rinsing unit 3 includes two horizontally arranged triangular prism-shaped and connected ri...

Embodiment 3

[0097] A soil rinsing device for remediation of heavy metal-contaminated soil, comprising a movable chassis 1, a soil-taking unit 2 arranged at the front end of the movable chassis 1, and a leaching unit arranged in the middle of the movable chassis 1 and connected to the soil-taking unit 2 Unit 3, a filter and soil drainage unit 5 arranged on the rear end of the movable chassis 1 and connected to the washing unit 3, and a eluent supply unit 4 arranged on the movable chassis 1 and connected to the washing unit 3;

[0098] The soil fetching unit 2 includes a lift guide rail 20 vertically arranged on the front end of the movable chassis 1, a soil crushing assembly 21 movably arranged on the lift guide rail 20, a soil entry piece 22 that can be in contact with the soil, and is connected to the soil entry piece 22 and the soil crushing assembly. 21 screw feeding roller group 23;

[0099] The rinsing unit 3 includes two horizontally arranged triangular prism-shaped and connected rins...

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Abstract

The invention relates to the technical field of heavy metal soil remediation, and discloses a soil rinsing device and method for remediation of heavy metal-contaminated soil; the soil rinsing device includes a movable chassis, and a soil fetching unit arranged at the front end of the movable chassis is arranged on a removable The rinsing unit in the middle of the movable chassis, and the filter and soil drainage unit arranged at the rear end of the movable chassis; the method includes: making the movable chassis enter the heavy metal polluted soil plot, and the soil fetching unit is in contact with the soil; then the movable chassis advances to make the polluted soil Enter the washing unit; then wash the contaminated soil, and stir the stirring roller group; filter and discharge the soil to filter the soil, and then discharge the soil; the present invention can solve the problem that the existing processing equipment occupies a large area, For the problem of complex ex-situ treatment process, realize in-situ soil leaching treatment.

Description

technical field [0001] The invention relates to the technical field of heavy metal soil remediation, in particular to a soil washing device and method for remediation of heavy metal contaminated soil. Background technique [0002] In recent years, during the adjustment of industrial structure and urban land use structure, some industrial enterprises occupying a superior position in the urban area have withdrawn from prosperous areas through relocation, relocation and reconstruction. After the relocation of these enterprises, pollutants such as heavy metals, pesticides, volatile and persistent organic pollutants left behind have become environmental hazards in urban land development and utilization. The safety of urban human settlements is worrying, and risk assessment and restoration are urgently needed. [0003] Soil leaching remediation technology is a process of eluting pollutants in soil using water or an aqueous solution containing rinsing aids, acid / alkali solutions, c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/02B02C13/02B02C13/286B01F33/83B01D33/35B01D36/00
CPCB09C1/02B02C13/02B02C13/286B01D33/35B01D36/00B02C2013/28654
Inventor 李群范婷婷王祥赵远超张胜田万金忠周艳
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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