Feeding, slurry making and grading recovery system for soil washing remediation

A recovery system and soil leaching technology, which is applied in the field of contaminated soil leaching and restoration, can solve problems such as screen blockage and secondary pollution, and achieve the effects of avoiding blockage, ensuring normal construction, and ensuring compatibility

Active Publication Date: 2017-07-25
BCEG ENVIRONMENTAL REMEDIATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved in the present invention is to overcome the problem in the prior art that the screen mesh is prone to clogging due to the uneven feed particle size, and solve the problem of the matching of ...

Method used

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  • Feeding, slurry making and grading recovery system for soil washing remediation

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Effect test

Embodiment 1

[0055] This embodiment provides a system for feeding slurry and graded recovery for soil leaching repair, such as figure 1 As shown, the system includes in order:

[0056] Crushing and screening module, the crushing and screening module includes a sieve with a screen aperture of 50mm, which is used to pretreat the contaminated soil into materials with a particle size of <50mm, so as to ensure the matching between the particle size of the feed contaminated soil and the system ;

[0057] Feed slurry making module is used for pulp making of feed contaminated soil, which is convenient for subsequent leaching and reduction of contaminated soil;

[0058] The leaching particle size module is used to leaching and recovering clean soil with different particle sizes to reduce the amount of pollution restoration work;

[0059] The washing water system, the crushing and screening module includes a feeding workshop 1 and a crushing and screening equipment 2 located therein; the crushing ...

Embodiment 2

[0091] The working steps of the soil rinsing and repairing system adopting the feeding pulping and classification recovery system of the present invention are as follows:

[0092] 1. Crushing and screening

[0093] Transport the excavated polluted soil to the feeding workshop, and use the crushing and screening machine to crush and screen in turn, and crush and screen the polluted soil containing two particle sizes of 50mm. The rinsing system is used to treat polluted soil with particle diameter<50mm;

[0094] 2. Feed pulp making

[0095] The crushed and screened <50mm particle size polluted soil is fed to the chain conveyor, and the chain conveyor feeds the contaminated soil to the belt conveyor I, and the belt conveyor is equipped with a belt scale to accurately adjust the amount of polluted soil. When the polluted soil goes to the high-level electromagnetic iron remover, the miscellaneous iron in the polluted soil is removed to the temporary storage area I of the miscella...

Embodiment 3

[0101] The feeding pulp making and classification recycling system of the present invention has been successfully applied to the soil leaching and restoration of a steel polluted site project in South China, the details are as follows:

[0102] The soil remediation volume of the project is 517591m 3 , where the heavy metal pollutants include Pb, Cd and Zn, etc.; the feed material for soil leaching is pretreated contaminated soil with a particle size of <50mm after crushing and screening, and the granular materials are classified into 25-50mm, 5-25mm, 2 -5mm, 1-2mm, 0.2-1mm, 0.075-0.2mm and <0.075mm, a total of 7 kinds of pellets. Among them, 25-50mm, 5-25mm, 2-5mm, 1-2mm, 0.2-1mm and 0.075-0.2mm, a total of 6 kinds of pellets are recyclable pellets. After soil sampling and testing, all the recyclable pellets after leaching meet the standard , can be recycled directly, the degree of reduction is 75-85%. The relevant data before and after washing treatment are shown in the tab...

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Abstract

The invention discloses a feeding, slurry making and grading recovery system for soil washing remediation and belongs to the technical field of soil remediation. The feeding, slurry making and grading recovery system for soil washing remediation comprises a crushing and screening module, a feeding and slurry making module and a washing and particle diameter classifying module in sequence. A crushing and screening device of the crushing and screening module is arranged in a feeding workshop with a tail gas treatment function. The feeding and slurry making module is provided with a rod grinding roller mud dissolving machine internally provided with steel rods. The washing and particle diameter classifying module is provided with a double-layer grading vibrating screen composed of a vibrating motor, a double-layer screen and a high-pressure spraying system. By adopting the feeding, slurry making and grading recovery system for soil washing remediation, the defect that a screen is likely to be blocked due to non-uniform feed particle diameters in the prior art is overcome, and the problems of matching of the washed soil particle diameter and equipment and secondary pollution in the polluted soil pretreatment process are solved.

Description

technical field [0001] The invention belongs to soil remediation technology, and relates to a leaching and remediation technology for polluted soil with high content of coarse particles. Background technique [0002] In recent years, with the advancement of my country's industrial structure adjustment and urban land use structure adjustment, some chemical, steel, machinery and other industrial enterprises occupying superior positions in urban areas have been relocated, relocated and reconstructed. However, the heavy metals, volatile and semi-volatile organic pollutants left behind by the relocation of enterprises have become environmental hazards in the development and utilization of urban land. Therefore, the safety of urban human settlements is worrying. Carry out risk assessment and soil restoration Governance is the top priority right now. [0003] Soil leaching and remediation technology is based on the adsorption characteristics of pollutants and the remediation conce...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/02B03B7/00B07B1/28
CPCB03B7/00B07B1/28B09C1/00B09C1/02
Inventor 崔双超李书鹏顾群杨乐巍刘鹏闫利刚谢方文丁浩然张岳田德金张晓斌范云
Owner BCEG ENVIRONMENTAL REMEDIATION CO LTD
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