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Heavy metal contaminated soil remediation equipment and remediation process thereof

A technology of polluted soil and heavy metals, applied in the restoration of polluted soil, etc., can solve the problems of large equipment footprint, backward repair technology, low degree of automation, etc., to achieve small footprint, avoid secondary pollution, and automation high effect

Active Publication Date: 2016-01-27
GUANGZHOU FIRST MUNICIPAL ENG CO LTD
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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 repair process, low treatment efficiency, poor effect, large equipment footprint, and low degree of automation.

Method used

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  • Heavy metal contaminated soil remediation equipment and remediation process thereof
  • Heavy metal contaminated soil remediation equipment and remediation process thereof
  • Heavy metal contaminated soil remediation equipment and remediation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 2 As shown, the remediation process of the above-mentioned heavy metal contaminated soil remediation equipment includes the following steps:

[0031] (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.

[0032] (2) Mechanical grinding: Preliminary crushing and sieving of the contaminated soil, the crushed and sieved soil is put into the wet ball mill through the feeding hopper for mechanical grinding for 30 minutes, and then the material is discharged through a 2mm sieve, and the part above the sieve enters the soil In the storage...

Embodiment 2

[0039] (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.

[0040] (2) Mechanical grinding: Preliminary crushing and sieving of the contaminated soil, the crushed and sieved soil is put into the wet ball mill through the feeding hopper for mechanical grinding for 30 minutes, and then the material is discharged through a 2mm sieve, and the part above the sieve enters the soil In the storage yard, the part under the sieve enters the continuous stirring tank for primary water washing.

[0041] (3) Primary water washing: The heavily polluted soil sieved in ...

Embodiment 3

[0047] (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.

[0048] (2) Mechanical grinding: Preliminary crushing and sieving of the contaminated soil, the crushed and sieved soil is put into the wet ball mill through the feeding hopper for mechanical grinding for 30 minutes, and then the material is discharged through a 2mm sieve, and the part above the sieve enters the soil In the storage yard, the part under the sieve enters the continuous stirring tank for primary water washing.

[0049] (3) Primary water washing: The heavily polluted soil sieved in ...

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Abstract

The invention relates to heavy metal contaminated soil remediation equipment. The heavy metal contaminated soil remediation equipment comprises a machine frame, a feeding hopper, grinding rollers, a ball mill, a screen sieve, a first-level rinsing pool, a linear vibrating screen, a slurry buffer pool, a slurry pump, a centrifugal machine, a deep leaching pool, a belt filter press and a second-level rinsing pool. Contaminated soil is subjected to mechanical grinding, first-level rinsing, first-level solid-liquid separation, deep leaching, second-level rinsing and second-level solid-liquid separation to be remedied. The heavy metal contaminated soil remediation equipment is advanced in process, good in treatment effect, high in working efficiency and high in automation degree.

Description

technical field [0001] The invention relates to the field of environmental protection equipment, in particular to a heavy metal-contaminated soil restoration equipment capable of effectively treating heavy metal-contaminated soil and a restoration 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 stab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/02
CPCB09C1/02
Inventor 肖远龙盛国军
Owner GUANGZHOU FIRST MUNICIPAL ENG CO LTD
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