Treatment method of high-concentration phosphorus-containing soil

A disposal method and high-concentration technology, applied in the restoration of polluted soil, etc., can solve the problems of endangering the surrounding environment and human health, and achieve the effects of avoiding safety and environmental risks, preventing spontaneous combustion of yellow phosphorus, and isolating the air

Active Publication Date: 2021-11-26
武汉瑞景环境修复工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a treatment method for high-concentration phosphorus-containing soil, which has the advantages of reducing yellow phosphorus activity in the pretreatment stage and reducing environmental problems during excavation, and solves the problem of high-concentration phosphorus-containing soil. When the soil encounters air during excavation, a large amount of dense smoke will be generated, which will endanger the surrounding environment and human health.

Method used

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  • Treatment method of high-concentration phosphorus-containing soil

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Embodiment 1

[0034] A method for disposing of high-concentration phosphorus-containing soil, comprising the following steps:

[0035] 1) First, clean up the surface of the phosphorus-contaminated site to ensure that the site of the phosphorus-contaminated site is level;

[0036] 2) Then, according to the distribution of phosphorus pollution in the soil, determine the in-situ injection point. According to the light phosphorus pollution, the injection depth should be kept at about 1-3m, and then the points should be distributed according to a triangle. The interval is 1-3m, because the influence radius of the injection point is 1-3m;

[0037] 3) Afterwards, drive the injection equipment into the phosphorus-contaminated site, inject stabilizing agents into the phosphorus-contaminated soil through the injection pipe under high pressure, and then use the stirring head to stir the soil in situ. The stirring makes the soil structure loose and the porosity increases, so By injecting while stirrin...

Embodiment 2

[0053] A method for disposing of high-concentration phosphorus-containing soil, comprising the following steps:

[0054] 1) First, clean up the surface of the phosphorus-contaminated site to ensure that the site of the phosphorus-contaminated site is level;

[0055] 2) Then, according to the distribution of phosphorus pollution in the soil, determine the in-situ injection point. According to the moderate phosphorus pollution, the depth of injection is kept at 3-4m, and then the points are distributed according to the triangle, and the interval between each point At 1-3m, because the influence radius of the injection point is 1-3m;

[0056] 3) Afterwards, drive the injection equipment into the phosphorus-contaminated site, inject stabilizing agents into the phosphorus-contaminated soil through the injection pipe under high pressure, and then use the stirring head to stir the soil in situ. The stirring makes the soil structure loose and the porosity increases, so By injecting w...

Embodiment 3

[0067] A method for disposing of high-concentration phosphorus-containing soil, comprising the following steps:

[0068] 1) First, clean up the surface of the phosphorus-contaminated site to ensure that the site of the phosphorus-contaminated site is level;

[0069] 2) Then, according to the distribution of phosphorus pollution in the soil, determine the in-situ injection point. According to the high level of phosphorus pollution, the injection depth is kept at about 6m, and then the points are distributed according to a triangle, and the interval between each point is 1 -3m, because the influence radius of the injection point is 1-3m;

[0070] 3) Afterwards, drive the injection equipment into the phosphorus-contaminated site, inject stabilizing agents into the phosphorus-contaminated soil through the injection pipe under high pressure, and then use the stirring head to stir the soil in situ. The stirring makes the soil structure loose and the porosity increases, so By inject...

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Abstract

The invention relates to the technical field of environmental protection, and discloses a treatment method of high-concentration phosphorus-containing soil. The method comprises the steps that firstly, the ground surface of a phosphorus-containing pollution site is cleaned up, an in-situ injection point position is determined according to the distribution condition of phosphorus pollution in soil, and the injection depth is larger than the phosphorus pollution depth; then a stabilizing agent is injected into the phosphorus-polluted soil at high pressure through an injection pipe, in-situ stirring is conducted on the soil through a stirring head, normal-temperature maintenance is conducted for 1-7 days, and finally excavation and tail end treatment are conducted. The activity of yellow phosphorus is reduced by adopting in-situ pretreatment and stabilization reaction, so that the safety and environmental risks caused by direct excavation and exposure of phosphorus-containing soil in air are avoided; besides, soil disturbance can be reduced through high-pressure injection and in-situ stirring, and large-area contact between phosphorus-containing soil and air is avoided; in addition, a colloidal layer is formed after the stabilizing agent reacts with yellow phosphorus on the soil surface for maintenance, so that air is isolated and yellow phosphorus is prevented from spontaneous combustion, and therefore the effect of reducing the activity of yellow phosphorus in the pretreatment stage is achieved, and environmental problems generated in the excavation process are reduced.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for treating high-concentration phosphorus-containing soil. Background technique [0002] During the development of urban plots in recent years, it is common to encounter phosphorus-containing contaminated soil buried underground, mainly due to the illegal discharge and filling of phosphorus-containing wastewater and phosphorus mud by early yellow phosphorus manufacturers. These polluted soils contain a high concentration of yellow phosphorus, which will not degrade naturally after being buried in the underground soil for decades, but when exposed to the air, the high concentration of yellow phosphorus spontaneously ignites, producing a large amount of thick smoke, which is harmful to human health. [0003] At present, there are few patents on the disposal of phosphorus-containing soil, and the treatment method is mostly excavation and then disposal. How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
CPCB09C1/08B09C2101/00
Inventor 李玲徐烨柯垚柯瑞李翌洲
Owner 武汉瑞景环境修复工程有限公司
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