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Cleaning-heat treatment coupling technology for high-concentration petroleum-contaminated soil

A technology for oil pollution and polluted soil, which is applied in the field of cleaning-heat treatment coupling process, can solve problems such as difficulty in meeting the target needs of practitioners, and achieve the effects of reducing the coefficient of variation, saving costs, and reducing pollution loads

Active Publication Date: 2021-04-09
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at this stage, the efficient disposal process of thermal desorption repair technology is still difficult to meet the target needs of practitioners

Method used

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  • Cleaning-heat treatment coupling technology for high-concentration petroleum-contaminated soil
  • Cleaning-heat treatment coupling technology for high-concentration petroleum-contaminated soil
  • Cleaning-heat treatment coupling technology for high-concentration petroleum-contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1 Cleaning and pretreatment of high-concentration petroleum-contaminated soil in the oilfield area

[0041] The objects to be disposed of are high-concentration oil-contaminated soils from Liaohe Oilfield (LH) and Daqing Oilfield (DQ). The contaminated soils are cleaned and pretreated after impurity removal and crushing. The parameters of oil-contaminated soil are analyzed in Table 1. The total amount of dirty oil contained in the soil is repeatedly sampled and measured, and the average values ​​of the dirty oil content calculated by statistical analysis are 11.84% and 10.47% (that is, the oil-containing g number per 100g of soil), and the coefficient of variation of the dirty oil content of each sample Respectively reached 15.29% and 13.19%. Extracting and analyzing the group components of the dirty oil samples showed that the contents of saturated hydrocarbons, aromatic hydrocarbons and non-hydrocarbons in the LH dirty oil samples were 6.11%, 1.52%, and 4.22%, ...

Embodiment 2

[0053] Example 2 Cleaning-heat treatment coupled treatment of high-concentration petroleum-contaminated soil in oilfield areas

[0054] The cleaned and pretreated high-concentration petroleum-contaminated soils in the Liaohe Oilfield and Daqing Oilfield were subjected to wet screening and dehydration treatment to separate large particle components with a particle size > 1 mm. The remaining soil samples were set to different degrees of dehydration, namely After dehydration, the water content in the oily soil is 0%, 5%, 8%, 12%, 15% and 20%, respectively, and thermal desorption treatment is carried out. The temperature range of thermal desorption treatment is 450 ℃ ~ 550 ℃, and the desorption residence time is 55min, the desorption result is as follows Figure 5 Shown, wherein, the thermal desorption polluted oil removal rate of the LH and DQ oil-contaminated soils with a water content of 8% all reaches the maximum value, showing that for the two kinds of oil-contaminated soil s...

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Abstract

The invention belongs to the field of research, development and application of the high-concentration petroleum-contaminated soil remediation technology, and further develops a cleaning-heat treatment coupling technology for high-concentration petroleum-contaminated soil. The technology achieves a treatment process for the high-concentration petroleum-contaminated soil. The technology comprises the following steps that cleaning pretreatment is conducted on the contaminated soil to be treated by utilizing a cleaning system which does not contain a surfactant medicament, and a treatment technology change time node is judged by investigating index changes such as particle size composition changes, dirty oil distribution variable coefficients, medium and low carbon number dirty oil component content and soil water content of the contaminated soil; and a thermal desorption treatment mode is coupled, so that the treatment of the high-concentration petroleum-contaminated soil to be treated is achieved. According to the cleaning-heat treatment coupling technology, the cleaning pretreatment process and the thermal desorption treatment technology are organically combined, the efficient and low-consumption treatment process for the high-concentration petroleum-contaminated soil is achieved, and good application and popularization prospects are achieved.

Description

technical field [0001] The invention belongs to the field of research, development and application of high-concentration petroleum-contaminated soil remediation technology, and furthermore develops a high-concentration petroleum-contaminated soil cleaning-heat treatment coupling process, which realizes the treatment process for high-concentration petroleum-contaminated soil. Background technique [0002] High-concentration oil-contaminated soil usually comes from processes such as drilling blowouts, oil spills, and mining accidents in oilfield areas. In the early stage, methods such as burial on the spot were usually used to quickly dispose of them so as not to delay production activities. However, high-concentration dirty oil can diffuse in the soil following the migration of soil water vapor, and with the increasing degree of oxidation, the aging degree of dirty oil continues to increase, its polarity continues to increase, and its hydrophilicity weakens, which makes it mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C19/06B09C1/02B09C1/06B09C1/08
CPCB09C1/065B09C1/08B09C1/02B02C19/06
Inventor 王卅郭书海邵志国程凤莲吴波李刚
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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