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A selection method for the application of thermal desorption technology in oil-contaminated soil

A technology for oil pollution and soil heat, which is applied in the selection field of thermal desorption technology for oil-contaminated soil, can solve the problems affecting the comprehensive cost of thermal desorption treatment, and achieve the optimization of high-efficiency oil-contaminated soil thermal desorption technology process, The effect of material balance optimization and optimization development

Active Publication Date: 2022-06-07
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, different tail gas treatment processes have their own optimal application conditions, which are related to the cost of equipment construction and energy resource utilization of desorbed gas, and ultimately affect the overall cost of thermal desorption treatment

Method used

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  • A selection method for the application of thermal desorption technology in oil-contaminated soil
  • A selection method for the application of thermal desorption technology in oil-contaminated soil
  • A selection method for the application of thermal desorption technology in oil-contaminated soil

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Example 1 Resource-based thermal desorption application mode of high concentration oil contaminated soil remediation

[0031] In the present embodiment, the high concentration of petroleum contaminated soil to be remedied is an oil content concentration of 17.82% (178.2g ·kg). -1 ), the thermal desorption treatment used is ectopic indirect thermal desorption. First of all, for the high concentration of oil contaminated soil ectopic thermal desorption treatment test, the small test using self-made indirect ectopic thermal desorption equipment, desorption temperature range of 500 ~ 550 °C, thermal desorption material residence time of 35min, thermal desorption treatment discharge, desorption gas through condensation treatment, liquefaction components through oil-water separation determination and recovery of oil content, non-condensing gas components through pressure and temperature measurement and calculation (PV = nRT) to obtain non-condensable gas component content, Thus o...

Embodiment 2

[0033] Example 2 Direct heat reuse type thermal desorption application mode of high concentration oil contaminated soil remediation

[0034] In the present embodiment, the oil content concentration of the high concentration of petroleum contaminated soil to be remedied is 7.01% (70.1g ·kg). -1 ), the thermal desorption treatment used is ectopic indirect thermal desorption. First of all, for the high concentration of oil contaminated soil, the ectopic thermal desorption treatment test is carried out, the small test is carried out by ectopic indirect thermal desorption equipment, the desorption temperature range is 550~600 °C, the thermal desorption material residence time is 40min, after measurement and calculation analysis, the total content of the desorption gas discharge in the main combustion chamber is 50.7kg / t oil-contaminated soil; Collect the desorption gas samples, use the national standard method (GB-T384-81) for the calorific value analysis of the desorption gas samples,...

Embodiment 3

[0036] Example 3 Indirect thermal reuse type thermal desorption application mode of high concentration oil contaminated soil restoration

[0037] In the present embodiment, the oil content concentration of the high-concentration petroleum contaminated soil to be remedied is 16.19% (161.9g·kg -1 ), the thermal desorption treatment used is ectopic indirect thermal desorption. First of all, for the high concentration of petroleum contaminated soil, the ectopic thermal desorption treatment test was carried out, the small test was carried out by ectopic indirect thermal desorption equipment, the desorption temperature range was 550~600 °C, the thermal desorption material residence time was 38min, and after measurement and calculation analysis, the total content of the desorption gas discharge in the main combustion chamber was 153.0kg / t oil-contaminated soil; Collect the desorption gas samples, use the national standard method (GB-T384-81) for the calorific value analysis of the desorp...

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Abstract

The invention relates to a thermal desorption restoration process for petroleum-contaminated soil, in particular to a method for selecting the application mode of the thermal desorption technology for petroleum-contaminated soil. According to the characteristics of desorbed gas after oil-contaminated soil thermal desorption treatment, the technology application mode is divided, and the content of desorbed gas (m), the calorific value of desorbed gas (q) and the desorbed gas produced by thermal desorption per ton of oil-contaminated soil are respectively divided. The total heat of gas combustion (Q) is assigned to standard parameters, and the application methods of thermal desorption technology are divided into resource utilization type, direct heat recovery type, indirect heat recovery type and tail gas treatment type based on the standard parameter value. type. According to the characteristics of oil-contaminated soil thermal desorption gas, the optimal thermal desorption technology application method is selected according to the thermal desorption application type parameter standard, so as to realize the high-efficiency and low-consumption thermal desorption treatment process of oil-contaminated soil.

Description

Technical field [0001] The present invention relates to a thermal desorption remediation process of contaminated soil, specifically a selective method for the application of thermal desorption technology for petroleum contaminated soil. Background [0002] With the rapid development of the global petrochemical industry, the intensity of oil and gas development continues to increase, and the consequent problem of soil oil pollution has become more and more prominent, which has seriously affected the health and safety of the soil ecological environment. As hydrophobic organic pollutants, petroleum pollutants have complex composition, diverse components, and high adhesion characteristics in soil aggregates, which are not easy to separate from soil, so it is difficult to remove. Among the existing remediation technologies, physical, chemical and biological remediation methods have been tried and applied, but it is difficult to ensure the treatment effect of oil-contaminated soil. Esp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/06
CPCB09C1/06Y02P70/10
Inventor 郭书海王卅吴波李刚程凤莲
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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