Roller-type reverse thermal desorption system for soil polluted by organic matters

A technology for polluted soil and thermal desorption, which is applied in the field of drum type reverse thermal desorption system for organic contaminated soil, can solve the problems of dioxin production, low thermal desorption efficiency, inability to realize continuous feeding, etc., and achieves large processing capacity. , The effect of high thermal desorption efficiency

CN102029287AActive Publication Date: 2011-04-27TSINGHUA UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2011-04-27

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Abstract

The invention relates to a roller-type reverse thermal desorption system for soil polluted by organic matters. The roller-type reverse thermal desorption system comprises a soil feeding system, wherein the soil feeding system and a heat source system are connected with a reverse thermal desorption system; the reverse thermal desorption system is connected with a dust removing system, a cooling system and an active carbon adsorption system in turn; and control ends of the soil feeding system, the heat source system, the reverse thermal desorption system, the dust removing system, the cooling system and the active carbon adsorption system are connected with a control system. In the roller-type reverse thermal desorption system, hot air is fed into a reverse thermal desorption roller by an ignition system, and polluted soil is fed into the reverse thermal desorption roller by a soil transferring device, wherein the hot air contacts the soil reversely, so that organic pollutants contained in the soil are heated and volatilized; the purified soil is used as backfill soil; and the volatilized tail gas is dedusted by a cyclone dust extractor and an adsorption dust extractor after passing through an induced draft fan, and the dedusted volatilized tail gas is absorbed by a honeycomb-shaped active carbon tower after passing through an atomization cooling tower and a dial plate cooling device, and finally is discharged by a tail gas exhaust device on the basis of meeting the national standard. Materials can be fed into the roller-type reverse thermal desorption system continuously and can be heated directly; and the hot air and the polluted soil are fully mixed, and the roller-type reverse thermal desorption system has high thermal desorption efficiency.
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Description

technical field

[0001] The invention belongs to the field of soil remediation, and in particular relates to a drum-type reverse thermal desorption system for organic matter polluted soil. Background technique

[0002] With the adjustment of industrial structure and the in-depth implementation of the "Stockholm Convention on Persistent Organic Pollutants (POPs)", a large number of high-polluting enterprises such as pesticide factories, steel factories and chemical factories, especially POPs production and use enterprises will gradually 86,000 enterprises have been shut down or relocated, among which 86,000 enterprises have been shut down or relocated across the country from 2001 to 2007, resulting in a large amount of high-pollution risk soil. The danger of soil pollution is that after some organic matter pollutes the soil, it will further pollute the air and water around the soil, while some organic matter or heavy metal pollution will pass through the food chain and have ad...

Examples

Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Referring to the accompanying drawings, a drum-type reverse thermal desorption system for organic matter polluted soil includes a soil feed system A, a heat source system B, a reverse thermal desorption system C, a dust removal system D, a cooling system E, an activated carbon adsorption system F and a control system 13. The output of the soil feeding system A is connected to the material input of the reverse thermal desorption system C, the output of the heat source system B is connected to the heat source input of the reverse thermal desorption system C, the output of the reverse thermal desorption system C is connected to the input of the dust removal system D, and the dust removal system The output of D is connected to the input of cooling system E, the output of cooling system E is connected to the input of activated carbon adsorption system F, soil feeding ...