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Soil leaching equipment and method for heavy metal contaminated soil remediation

A technology for polluted soil and soil leaching, which is applied to the restoration of polluted soil, separation methods, chemical instruments and methods, etc. Difficulties, reduction of processing costs, and effect of reduction of processing steps

Active Publication Date: 2022-01-11
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 leaching equipment and method for heavy metal contaminated soil remediation
  • Soil leaching equipment and method for heavy metal contaminated soil remediation
  • Soil leaching equipment and method for heavy metal contaminated soil remediation

Examples

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 rin...

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Abstract

The invention relates to the technical field of heavy metal soil remediation, and discloses soil leaching equipment and method for heavy metal contaminated soil remediation. The soil leaching equipment comprises a movable chassis, a soil sampling unit arranged at the front end of the movable chassis, a leaching unit arranged in the middle of the movable chassis, and a water filtering and soil discharging unit arranged at the rear end of the movable chassis. The method comprises the steps that a movable chassis enters a heavy metal contaminated soil plot, and a soil sampling unit makes contact with soil; the movable chassis advances to enable the contaminated soil to enter a leaching unit; then the contaminated soil is leached, and a stirring roller set performs stirring; and a water filtering and soil discharging unit performs water filtering treatment on the soil, and then discharges the soil. According to the invention, the problems that in the prior art, treatment equipment is large in occupied area, and the ectopic treatment process is complex can be solved, and in-situ soil leaching treatment is achieved.

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 Applications(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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