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Method for treating soil pollution in a hierarchically cyclic cleaning manner

A technology for soil pollution and pollutants, applied in the field of restoration of contaminated soil, to achieve thorough cleaning, avoid secondary pollution, and high cleaning efficiency

Inactive Publication Date: 2013-09-18
东营金川水土环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems existing in the existing engineering technology, and provides a method for treating soil pollution with layered cycle cleaning and multi-stage separation of pollutants once put into long-term stable operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparations before construction:

[0025] A water injection system and a sewage treatment system are set up on the ground, wherein the water injection system includes a water injection pump connected to a sump, the sewage treatment system includes a water pump and a sewage treatment device, and the end of the sewage treatment device is connected to the sump of the water injection system through a pipeline and a control valve.

[0026] The surface pipe network is set on the surface layer, and the multi-layer underground pipe network is buried along the depth direction underground. Among them, the surface pipe network is composed of irrigation pipes, sprinkler pipes or seepage / water collection pipes according to the size of the required treatment area; the underground pipe network Each layer is composed of multiple seepage / water collection pipes arranged in parallel. According to the degree of soil pollution, the horizontal distance between the pipes is selected to be in ...

Embodiment 2

[0032] In the case of severe soil pollution, in order to avoid re-pollution of the surrounding soil during the cleaning process, on the basis of the above-mentioned embodiment 1, it also includes: an isolation board or an isolation film is embedded around the contaminated soil to be treated, and the isolation board includes prefabricated concrete A kind of board or plastic board or metal board. The method of embedding the isolation plate is to arrange several high-pressure water pipes vertically on the isolation plate, and the end of the high-pressure water pipe near the bottom of the isolation plate is connected to the high-pressure water nozzle, and the high-pressure water pipe is connected to the high-pressure water pump. . Embedding the isolation film requires trenching and embedding. The embedding depth is determined according to the depth of soil contamination.

Embodiment 3

[0034] On the basis of Example 1 and Example 2, when the depth of contaminated soil is greater than 5 meters, during the preliminary preparation, sand filter pipes are evenly buried in the depth direction below the underground pipe network at the bottom layer as vertical shafts, and the vertical shafts pass through the collection pipe and The surface pump is connected to the sewage treatment device; in the subsequent treatment steps, after the bottom layer of contaminated soil is treated, the bottom layer of the underground pipe network is used as the cleaning pipe network to connect with the water injection system, and the shaft pipe network is used as the collection pipe network and the sewage treatment system connection, to clean the polluted soil below the lowest layer of the underground pipe network, and the cleaned sewage is introduced into the sewage treatment device through the vertical shaft, collecting pipe and pump for purification treatment, and the purified water th...

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Abstract

The invention discloses a method for treating the soil pollution in a hierarchically cyclic cleaning manner. According to the method, water seepage / water collection pipe networks are hierarchically arranged on the earth surface and under the earth and work together with a water injection system and a sewage treatment system, which are arranged on the ground, to clean polluted soil hierarchically and sequentially from top to bottom until all of the soil with the pipe networks are completely cleaned to reach the ruled standard. If the deep soil layer 5 meters under the ground still has pollutants required to be cleaned away, a quincunx-shaped silo can be used for extracting the polluted water, and the lowermost layer of water seepage / water collection pipe network is used for filling clean water. The depth of the silo is set according to a demand that the silo reaches a non-permeable layer. Separated heavy metals and pollutants can be recycled and treated into harmless resources. According to the method, the shortcomings of the conventional treatment method are fundamentally overcome; furthermore, equipment is small in investment and high in cleaning efficiency and can thoroughly clean the pollutants; and the method is extremely good in popularization and application prospect.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution treatment and protection, in particular to the restoration technology of polluted soil, and is an engineering method for soil pollution treatment by layered cycle cleaning and multi-stage separation treatment. Background technique [0002] Due to urban expansion, some pesticide factories, fertilizer factories, and chemical factories originally distributed in the outskirts of the city have been transformed into the central area of ​​the city. When the land use was changed, it was found that the soil was seriously polluted by heavy metals and organic matter and could not be used for human life, residence and activities. The site must be treated and repaired before it can be used. In addition, some farmlands have been polluted by sewage and waste gas from chemical enterprises or mining and smelting enterprises for a long time, and crops with excessive harmful substances must be treate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/02
Inventor 彭成山袁扬林国华
Owner 东营金川水土环境工程有限公司
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