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Method for achieving organic contaminated solid waste remediation by using microwave process

An organic and microwave technology, applied in the restoration of polluted soil, etc., can solve the problems of complex process, large amount of smoke and dust, and large dependence on natural gas, etc., to achieve clean repair process, low processing temperature, and good repair effect Effect

Active Publication Date: 2018-05-04
北京钢研新冶工程技术中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This repair technology has complicated process, high equipment investment and operation cost, especially it is very dependent on natural gas. At the same time, due to the heating method of direct heat exchange between high-temperature flue gas and materials, the amount of flue gas and the amount of dust in flue gas are very high. Huge, secondary pollution control pressure is high
After the soil is roasted above 550°C, it will become ceramsite, which will have an adverse effect on the recycling of the soil.

Method used

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  • Method for achieving organic contaminated solid waste remediation by using microwave process
  • Method for achieving organic contaminated solid waste remediation by using microwave process
  • Method for achieving organic contaminated solid waste remediation by using microwave process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The composition of the sandy organic polluted soil treated is shown in Table 1.

[0046] Table 1 Composition of organic polluted soil (sandy soil) to be treated

[0047]

[0048] The first step: the material is screened, iron-removed and crushed, and there are no particles larger than 20mm in the processed material;

[0049] The second step: add auxiliary heating balls to the processed materials, and mix the cloth. Take 30kg of sandy organic polluted soil whose composition is shown in Table 1, mix it according to the ball-to-material ratio of 1:2, and spread it evenly.

[0050] Step 3: Heat the material with auxiliary heating pellets in a microwave oven with a power of 20kW. After preheating and high-temperature thermal desorption, the temperature is raised to 500-550°C and then kept at a constant temperature.

[0051] Step 4: After the constant temperature, the material is cooled and pushed out, and the material is discharged.

[0052] The components of the soil ...

Embodiment 2

[0056] See Table 3 for the components of the treated clay-organic contaminated soil.

[0057] Table 3 Composition of organic polluted soil (clay soil) to be treated

[0058]

[0059] The first step: the material is screened, iron-removed and crushed, and there are no particles larger than 20mm in the processed material;

[0060] The second step: add auxiliary heating balls to the processed materials, and mix the cloth. Take 30kg of viscous organic polluted soil whose composition is shown in Table 3, mix it according to the ratio of ball to material 1:2.5, and spread it evenly.

[0061] Step 3: Heat the material with auxiliary heating pellets in a microwave oven, preheat and heat up at a power of 25kW, and desorb at a high temperature.

[0062] Step 4: After the constant temperature, the material is cooled and pushed out for discharge.

[0063] The components of the soil after microwave treatment all meet the national standards, and the results are as follows

[0064] Ta...

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Abstract

A method for achieving organic contaminated solid waste remediation by using a microwave process comprises the steps that organic contaminated solid waste is heated by using a microwave heating technology, organic matter in the solid waste is vaporized and desorbed, and the organic contaminated solid waste is remediated. According to the method, the technical advantage of microwave selective heating is fully utilized, microwaves can directly act on organic contaminants, a solid substance generates a small temperature rise and a small influence while the organic matter is desorbed, the high energy consumption and high pollution problems of the large smoke amount, the large dust amount, the nitrogen oxide pollution and the like in the heating desorption process are solved, and the low-consumption, efficient and clean remediation process of the organic contaminated solid waste is achieved. By the adoption of the method, the remediation effect is good, the treatment temperature is low, a small amount of smoke is generated, almost no dust is generated, and the remediated soil can meet the requirements of parks and the residual land.

Description

technical field [0001] The invention relates to the technical field of solid pollutant remediation treatment, in particular to a method for realizing the remediation of organic polluted solid waste by using a microwave process. Background technique [0002] Soil is an important part of the ecosystem, and the control of soil pollution is an important problem that needs to be overcome in the construction of ecological civilization. Solid wastes from industrial sites such as oil extraction, oil refining and chemical industry, iron and steel industry, and coal chemical industry are the main sources of soil pollution. At the same time, municipal sludge, river mud, pond mud, sewage irrigation, etc. will also produce a lot of pollution soil. On April 17, 2014, the Ministry of Environmental Protection and the Ministry of Land and Resources jointly issued the "National Soil Pollution Survey Bulletin", pointing out that the total over-standard rate of soil in the country reached 16.1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/06
CPCB09C1/06
Inventor 庞建明潘聪超邸久海宋耀欣赵志民
Owner 北京钢研新冶工程技术中心有限公司
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