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Organically-polluted soil remediation method

An organic pollution and soil remediation technology, applied in the field of organic contaminated soil remediation, can solve the problems of small application range, unsatisfactory separation effect and limited application range of organic contaminated soil, achieve high soil remediation efficiency, avoid pollutant leakage, equipment simple effect

Active Publication Date: 2014-01-08
LUOYANG CEMENT ENG DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many countries in Europe and the United States have engineered this technology, and it is widely used in the remediation of organically polluted soil in highly polluted sites. The remediation system mainly adopts the direct heating desorption process, which has a limited scope of application, relatively high heat consumption, and is prone to secondary pollution. Pollution, unsatisfactory separation effect
[0005] The patent document with the application number 200920083460.X discloses a purification equipment for organic-contaminated soil, which has a small scope of application for organic-contaminated soil, complex operation, high energy consumption, and incomplete repair

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The organic polluted soil is sent into the roasting chamber 3, and the hot gas generated by the combustion furnace 10 enters the heating channel 6 to heat and restore the organic polluted soil in the roasting chamber 3, and the organic pollutants and moisture separated from the organic polluted soil enter the combustion furnace 10 to be burned. Complete decomposition and combustion, the flue gas produced after combustion passes through the heating channel 6, bag filter 13, exhaust fan 17, chimney 18, acid removal device 19, and finally discharged; the repaired soil enters the cooling machine 20 to exchange heat with cold air, generating The hot blast enters in the combustion furnace 10 and is used as secondary hot blast, and the soil after repairing and cooling is recycled.

Embodiment 2

[0028] The organic polluted soil enters the roasting chamber 3 from the conveying device 1 through the material inlet 4, and the material inlet 4 is closed; the clean fuel burns in the combustion furnace 10 to generate hot gas, the temperature of the hot gas is 600-750°C, and the hot gas comes out of the heat outlet of the combustion furnace After 12 is discharged, it enters the heating channel 6 through the heat inlet 7 of the heating channel, and the rotation of the rotary kiln 2 drives the rotation of the roasting furnace wall 2-1. Through indirect heating, the temperature of the organic polluted soil in the roasting chamber 3 reaches above 550°C, and the heating is continued for 6 -9 minutes, the organic pollutants in the soil are evaporated and separated.

Embodiment 3

[0030] During the heating process, the separated organic pollutants and moisture are discharged from the polluted gas outlet 9, enter the combustion furnace 10 through the gas inlet 11 of the combustion furnace, and are completely decomposed and burned, and the flue gas and hot gas generated after combustion are discharged from the heat outlet 12 of the combustion furnace , enter the heating channel 6 through the heat inlet 7 of the heating channel, after the flue gas and hot gas indirectly heat the organic contaminated soil, they are discharged from the heat outlet 8 of the heating channel, and enter the bag filter 13 through the air inlet 14 of the bag filter.

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Abstract

The invention discloses an organically-polluted soil remediation method which refers to a conveyer, a rotary kiln, a roasting furnace wall, a roasting chamber, a material inlet, a material outlet, a heating channel, a heating channel heat inlet, a heating channel heat outlet, a polluting gas outlet, a combustion furnace, a combustion furnace gas inlet, a combustion furnace heat outlet, a bag deduster, a bag deduster air inlet, a bag deduster smoke outlet, a soil particle outlet, an exhaust fan, a chimney, a deacidification device, a cooler, a cooler feed port, a cooler hot air outlet and a cooler discharge port. Since indirect heating desorption is adopted, hot air and soil are not in direct contact, energy consumption is low, desorption efficiency is high, and the soil can be thoroughly remedied; separated organic pollutants enter the combustion furnace to be completely combusted and decomposed by enriched oxygen, as a result, exhausted air quantity is small, secondary pollution is not caused, energy is saved, efficiency is improved, and investment is low.

Description

[0001] technical field [0002] The invention relates to the technical field of soil remediation treatment, in particular to a method for remediating organic polluted soil. [0003] Background technique [0004] The main principle of the thermal treatment and remediation technology of contaminated soil is to evaporate the organic pollutants in the contaminated soil through heat exchange to separate them from the soil. At present, many countries in Europe and the United States have engineered this technology, and it is widely used in the remediation of organically polluted soil in highly polluted sites. The remediation system mainly adopts the direct heating desorption process, which has a limited scope of application, relatively high heat consumption, and is prone to secondary pollution. Pollution, the separation effect is not ideal. [0005] The patent document with application number 200920083460.X discloses a purification device for organic-contaminated soil, which has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/06
Inventor 王群红赵迎朝代家聚刘心蕊廖祥来陈辉
Owner LUOYANG CEMENT ENG DESIGN & RES INST
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