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Layering treatment method for petroleum-contaminated soil

A soil stratification and oil pollution technology, applied in the field of polluted soil treatment, can solve the problems of large influence of soil physical and chemical properties and high energy consumption of incineration technology, and achieve the effect of improving the effect

Inactive Publication Date: 2020-08-07
尤宝旺
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the incineration technology in the heat treatment technology has problems such as high energy consumption and great impact on the physical and chemical properties of the soil, which are the challenges faced by the current heat treatment and remediation of oil-contaminated soil.

Method used

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  • Layering treatment method for petroleum-contaminated soil
  • Layering treatment method for petroleum-contaminated soil
  • Layering treatment method for petroleum-contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as Figure 1~5 Shown, a kind of petroleum-contaminated soil layered control method in the inventive method comprises the following steps:

[0046] Step 1, deep excavate the land to be processed at least twice, the depth of digging is 0.5-0.8m, and remove the gravel in the land to be processed;

[0047] Step 2: Excavate 10-25cm thick surface soil by using the excavation part of the traveling soil treatment device, and preheat the soil for crushing, screening and pyrolysis treatment to obtain a pyrolysis mixture. The solution treatment device is parked once every 5-15m. During the parking process, the high-pressure spraying part of the traveling soil treatment device is used to spray the microbial treatment solution at least 15cm deep into the soil at a fixed distance;

[0048] Step 3: After the pyrolysis mixture in the traveling soil treatment device is processed, return along the original travel path and use the spreader to spread the pyrolysis mixture on the grou...

Embodiment 2

[0074] Step 1, deep excavate the land to be processed twice, the depth of digging is 0.5m, and remove the gravel in the land to be processed;

[0075] Step 2: Use the excavation part of the traveling soil treatment device to excavate 10 cm thick surface soil and preheat the soil for crushing, screening and pyrolysis to obtain a pyrolysis mixture. The device is parked once every 15m. During the parking process, the high-pressure spraying part of the traveling soil treatment device is used to spray the microbial treatment solution at a fixed distance of 15cm into the soil at a high pressure;

[0076] Step 3: After the pyrolysis mixture in the traveling soil treatment device is processed, return along the original travel path and use the spreader to spread the pyrolysis mixture on the ground treated by the high-pressure spraying department, the laying width and laying thickness Adapt to the width and thickness of the excavated topsoil in step 2;

[0077] Step 4, when the surface...

Embodiment 3

[0090] Step 1: Dig the land to be processed three times, with a depth of 0.6m, and remove the gravel in the land to be processed;

[0091] Step 2: Use the excavation part of the traveling soil treatment device to excavate 17cm thick surface soil and preheat the soil for crushing, screening and pyrolysis treatment to obtain a pyrolysis mixture. The device is parked once every 10m. During the parking process, the high-pressure spraying part of the traveling soil treatment device is used to spray a microbial treatment solution at a fixed distance of 20cm into the soil at a high pressure;

[0092] Step 3: After the pyrolysis mixture in the traveling soil treatment device is processed, return along the original travel path and use the spreader to spread the pyrolysis mixture on the ground treated by the high-pressure spraying department, the laying width and laying thickness Adapt to the width and thickness of the excavated topsoil in step 2;

[0093] Step 4, when the surface temp...

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Abstract

The invention discloses a layering treatment method for petroleum-contaminated soil. The layering treatment method comprises the following steps: deeply ploughing a to-be-treated land parcel for at least two times; digging surface soil, carrying out preheating crushing, screening and pyrolysis treatment on the soil to obtain a pyrolysis mixture, carrying out fixed-distance deep penetration into the soil, and carrying out high-pressure spraying of a microbial treatment solution once; paving the pyrolysis mixture on the ground; after the temperature of the surface layer of the pyrolysis mixtureis reduced, spreading the soil treatment mixture on the treated land parcel, raking once, and carrying out heat preservation plastic film mulching treatment; repeating the above steps once; spreadingthe soil treatment mixture mixed with grass seeds on the to-be-treated land parcel, raking the land once, and covering the land with a heat preservation plastic film; and repeating the above steps until the concentration of petroleum in the soil with the depth of 0-50 cm of the to-be-treated land parcel is lower than a restoration target value. According to the layering treatment method for the petroleum-contaminated soil, a physical method and a biological method can be combined to carry out layering treatment on the petroleum-contaminated soil, so the treatment effect is effectively improved.

Description

technical field [0001] The invention relates to the technical field of contaminated soil treatment, in particular to a layered treatment method for petroleum-contaminated soil. Background technique [0002] At present, the remediation technologies for oil-contaminated soil mainly include bioremediation, leaching and heat treatment technologies. Bioremediation has the advantages of simple operation, low cost and less secondary pollution, but it can only treat low-concentration petroleum-contaminated soil and the treatment period is long, and it cannot effectively degrade heavy petroleum components such as colloids and asphaltene; the leaching method It has the disadvantages that it is difficult to separate the eluate from the soil, it is difficult to adapt to the sticky soil, and the eluate needs further treatment. Thermal treatment technology has significant advantages such as high remediation efficiency and good adaptability to the types and concentrations of organic pollu...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10B09C1/06
CPCB09C1/00B09C1/06B09C1/10
Inventor 尤宝旺
Owner 尤宝旺
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