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Thermal desorption repair method for treating organic pollution site

A technology of organic pollution and remediation methods, applied in the field of soil remediation, can solve problems such as unsuitable remediation time, long in-situ remediation technology, heavy tasks, etc., and achieve the effects of reducing dioxin generation, movable equipment, and wide treatment range

Inactive Publication Date: 2021-11-19
湖南新九方科技有限公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] However, with the adjustment of the economic structure, a large number of chemical plants have moved out of urban areas, and the remaining polluted sites are often used for real estate development. The task is heavy and the cycle is short. bit repair technique

Method used

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  • Thermal desorption repair method for treating organic pollution site

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] Such as figure 1 As shown, the thermal desorption equipment used in the present invention includes an upper rotary kiln, a lower rotary kiln and a burner group. The upper rotary kiln is provided with a drying chamber, and the lower rotary kiln is provided with a thermal analysis chamber. under the rotary kiln.

[0020] One end of the drying chamber is connected to the feed hopper, and the discharge port at the other end is connected to the thermal analysis chamber. The discharge port of the thermal analysis c...

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Abstract

The invention relates to a thermal desorption repair method for treating an organic pollution site. The thermal desorption repair method comprises the following steps: (1) soil excavating; (2) pretreatment; (3) thermal desorption treatment; and (4) tail gas treatment. The method is characterized in that a physical separation process for converting the pollutants from one phase to another phase, and the damage effect on the organic pollutants does not occur in the remediation process. The pollutants are selectively volatilized by controlling the temperature of the thermal desorption system and the retention time of the polluted soil, and chemical reactions such as oxidation and decomposition do not occur. Therefore, the technology has the advantages that the pollutant treatment range is wide, the equipment is movable, the repaired soil can be recycled and the like, and particularly for chlorine-containing organic matters such as PCBs, the generation of dioxin can be remarkably reduced by adopting a non-oxidative combustion treatment mode.

Description

technical field [0001] The invention relates to the field of soil remediation, in particular to a thermal desorption remediation method for treating organic polluted sites. Background technique [0002] Ex situ remediation of organic contaminated sites is a method of transferring contaminated soil from the contaminated area to adjacent sites or reactors to remove the pollutants therein. Commonly used ectopic remediation techniques include incineration, thermal desorption and rinsing techniques. Incineration technology is a relatively mature restoration technology that uses high temperature and thermal oxidation to treat organic waste in the soil to achieve a treatment process that reduces the volume of waste and reduces the toxicity or hazard of waste. Soil washing technology is one of the few remediation methods that can completely remove pollutants from the soil. Pollutants in the soil are mainly adsorbed on the surface of particles with smaller particle sizes. After the...

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Application Information

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IPC IPC(8): B09C1/06B09C1/00
CPCB09C1/065B09C1/005
Inventor 纪智慧成一知杨添奇贺志勇李素敏吴云
Owner 湖南新九方科技有限公司
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