Treatment device for heavy metal polluted soil and treatment process thereof

A technology of polluted soil and treatment equipment, which is applied in the restoration of polluted soil, etc., can solve the problems of large equipment footprint, backward treatment technology, and low degree of automation, and achieve small footprint, high repair efficiency, and automation high effect

Inactive Publication Date: 2016-11-09
杰瑞环境工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing heavy metal contaminated soil remediation treatment adopts simple process and equipment for simple treatment, which has disadvantages such as backward treatment process, low treatment efficiency, poor effect, large equipment footprint, and low degree of automation.

Method used

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  • Treatment device for heavy metal polluted soil and treatment process thereof
  • Treatment device for heavy metal polluted soil and treatment process thereof
  • Treatment device for heavy metal polluted soil and treatment process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 2 As shown, the treatment process of the above-mentioned heavy metal contaminated soil treatment device includes the following steps:

[0032] (1) Soil classification: A three-dimensional inspection was performed on the soil of a lead-contaminated site, and it was classified into heavily polluted soil (average Pd concentration was 3.182mg / g), lightly polluted soil (average Pd concentration was 1.563mg / g) and Uncontaminated soil (with an average Pd concentration of 0.391mg / g) is piled up separately, heavily polluted soil and lightly polluted soil are crushed and screened, and uncontaminated soil is backfilled directly.

[0033] (2) Mechanical grinding: Preliminary crushing and sieving of the contaminated soil, the crushed and sieved soil is put into the wet ball mill 3 through the feeding hopper 1 for mechanical grinding for 30 minutes, and then the material is discharged through a 2mm sieve. Enter the soil stockyard, and the under-sieve part enters the ...

Embodiment 2

[0040] (1) Soil classification: A three-dimensional inspection was performed on the soil of a lead-contaminated site, and it was classified into heavily polluted soil (average Pd concentration was 3.182mg / g), lightly polluted soil (average Pd concentration was 1.563mg / g) and Uncontaminated soil (with an average Pd concentration of 0.391mg / g) is piled up separately, heavily polluted soil and lightly polluted soil are crushed and screened, and uncontaminated soil is backfilled directly.

[0041] (2) Mechanical grinding: Preliminary crushing and sieving of the contaminated soil, the crushed and sieved soil is put into the wet ball mill 3 through the feeding hopper 1 for mechanical grinding for 30 minutes, and then the material is discharged through a 2mm sieve. Enter the soil stockyard, and the under-sieve part enters the continuous mixing tank for primary water washing.

[0042] (3) Primary washing: The heavily polluted soil sieved in step S2 enters the primary washing pool 5, a...

Embodiment 3

[0048] (1) Soil classification: A three-dimensional inspection was performed on the soil of a lead-contaminated site, and it was classified into heavily polluted soil (average Pd concentration was 3.182mg / g), lightly polluted soil (average Pd concentration was 1.563mg / g) and Uncontaminated soil (with an average Pd concentration of 0.391mg / g) is piled up separately, heavily polluted soil and lightly polluted soil are crushed and screened, and uncontaminated soil is backfilled directly.

[0049] (2) Mechanical grinding: Preliminary crushing and sieving of the contaminated soil, the crushed and sieved soil is put into the wet ball mill 3 through the feeding hopper 1 for mechanical grinding for 30 minutes, and then the material is discharged through a 2mm sieve. Enter the soil stockyard, and the under-sieve part enters the continuous mixing tank for primary water washing.

[0050] (3) Primary washing: The heavily polluted soil sieved in step S2 enters the primary washing pool 5, a...

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Abstract

The invention relates to a treatment device for heavy metal polluted soil. The treatment device comprises a machine frame, a feeding hopper, crushing rollers, a ball grinder, a separation screen, a first-stage water washing pool, a linear vibration screen, a slurry buffering pool, a slurry pump, a centrifugal machine, a deep elution pool, a belt filter press and a second-stage water washing pool. The polluted soil is remedied through mechanical grinding, first-stage water washing, first-stage solid-liquid separation, deep elution, second-stage water washing and second-stage solid-liquid separation. The process is advanced, the treatment effect is good, the work efficiency is high, and the automation degree is high.

Description

technical field [0001] The invention relates to the field of environmental protection equipment, in particular to a heavy metal-contaminated soil treatment device capable of effectively treating heavy-metal-contaminated soil and a treatment process thereof. Background technique [0002] The heavy metal pollution in the soil mainly comes from the untreated discharge of waste residue, waste water and waste gas produced by industrial, mining and chemical enterprises. The main pollution factors are lead, arsenic, cadmium, zinc, mercury, copper, etc. Soil heavy metal pollution not only affects the quality of agricultural products, but also And affect the quality of air and water environment. At the same time, severe soil pollution has become the main factor restricting the sustainable development and utilization of land in urban areas. [0003] Soil leaching is a physical and chemical remediation technology, which uses a leaching agent to wash the soil to form a more stable comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/02B09C1/08
CPCB09C1/02B09C1/08
Inventor 易湘琢谢奇文杜晓濛盛国军
Owner 杰瑞环境工程技术有限公司
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