Modular soil leaching method and equipment

A soil leaching and modularization technology, which is applied in the field of contaminated soil remediation, can solve the problems of restricting development, resource reuse of washed soil, etc., so as to avoid secondary attachment, reduce sludge production, and arrange small area effect

Pending Publication Date: 2018-10-09
上海康恒环境修复有限公司
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Problems solved by technology

[0008] However, the existing leaching technologies basically focus on the leaching effect, and seldom mention the resource reuse of the washed soil, which greatly limits the development of this concept in soil remediation projects.

Method used

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  • Modular soil leaching method and equipment
  • Modular soil leaching method and equipment
  • Modular soil leaching method and equipment

Examples

Experimental program
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Embodiment 1

[0032] After testing the polluted soil, the pollution depth is 0.5m-1m, and the total amount of polluted soil is 9000 cubic meters. The repair period is 50 days, and two treatment modules are used in total, with a treatment capacity of 200 cubic meters per day. The two treatment modules share a water treatment device. The leaching solid-liquid ratio is 3.5:1, and the leaching waste is treated with water After that, it will be recycled as clean washing water; the particle size of the polluted soil has been tested, and the soil with a particle size of 0.15-3mm has a mass percentage of 100% and a lead content of 840mg / kg. The integrated equipment of drum cleaning machine, drum sieve classifier, and high-number separator can obtain soil with a particle size greater than 0.075mm, which has a mass percentage of 74% and a lead content of 100mg / kg, which is lower than the "Exhibition Land Soil Environment "Quality Evaluation Standard" (HJ350-2007) Class A standard (140mg / kg), the sepa...

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Abstract

The invention relates to the field of contaminated soil repair, in particular to a modular soil leaching method and equipment. The equipment is sequentially connected with the following devices including a soil sieving device, a cleaning device, a grading sieving system, a transfer groove and water treatment equipment through pipelines, wherein the soil sieving device is used for separating out particles being greater than 40mm; the cleaning device is used for leaching soil and crushing the soil particles; the grading sieving system is used for separating out psephitic cleaned soil with the particle size being 5 to 40mm and sandy cleaned soil with the particle size being 0.075 to 5mm; the transfer groove is used for storing a mud water mixture; the water treatment equipment is used for treating the mud water mixture and obtaining mud cake and filtered water through press filtering. The leaching and sieving functions are integrated; the space utilization rate is improved; during the soil leaching, particulate matters with different particle sizes can be separated as much as possible; the cleaned soil resource reutilization rate is improved; the production of sludge is reduced.

Description

technical field [0001] The invention relates to the field of contaminated soil restoration, in particular to a modular soil washing method and equipment. Background technique [0002] With the rapid development of my country's economy, the problem of soil pollution in my country has become increasingly prominent. Due to improper operation or management in the production process of some industrial enterprises, a large amount of pollutants enter the surrounding environment, causing serious pollution. With the acceleration of urban construction, the nature of the site changes very frequently. If abandoned chemical polluted sites are used for agricultural or commercial purposes, they will seriously threaten the environment and human health. Therefore, it is urgent to remediate the contaminated soil of the original industrial abandoned sites. [0003] According to research and practical experience at home and abroad, the current ideas for dealing with polluted soil mainly inclu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/02
CPCB09C1/02
Inventor 朱晓平王湘徽胡佳晨陈睿明尹力陆锟陈建飞赵熠毛春华
Owner 上海康恒环境修复有限公司
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