Synergistic indirect thermal desorption soil remediation system and remediation method thereof

A soil remediation and thermal desorption technology, which is applied in the field of collaborative indirect thermal desorption soil remediation system and its remediation, can solve the problems of easy generation of secondary pollutants such as dioxin, high thermal desorption temperature, and high treatment cost. Achieve the effects of improving thermal desorption efficiency, reducing desorption temperature, and reducing repair costs

Pending Publication Date: 2019-08-30
CSSC NANJING LUZHOU ENVIRONMENT PROTECTION CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the thermal desorption adopts the direct heating method. For chlorine-containing organic pollutants such as PCBs, not only are secondary pollutants such as dioxins easily generated during the heating process, but also the required thermal desorption temperature is high, and the amount of tail gas produced Large, high processing cost

Method used

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  • Synergistic indirect thermal desorption soil remediation system and remediation method thereof
  • Synergistic indirect thermal desorption soil remediation system and remediation method thereof

Examples

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Embodiment 1

[0025] See figure 1 , The cooperative indirect thermal desorption soil remediation system provided in this embodiment includes an lye spraying feed system, a thermal desorption system, an exhaust gas purification system, and a sewage treatment system connected in sequence;

[0026] The lye spraying and feeding system includes lye dosing tank 1, feeding bin 2, belt metering scale 3 and scraper 4. The lye dosing tank 1 is connected to one end of the belt metering scale 3 through the feeding bin 2 and the belt The other end of the weighing scale is connected to the scraper 4, and the amount of lye sprayed can be adjusted according to the feed amount measured by the belt weighing scale 3, and mixed in the feed bin 2. The material after mixing the lye passes through the scraper 4Send to the thermal desorption system;

[0027] The thermal desorption system includes a rotary kiln-type thermal desorption chamber 5, the feed inlet of the rotary kiln-type thermal desorption chamber 5 is conn...

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Abstract

The invention relates to a synergistic indirect thermal desorption soil remediation system and a remediation method thereof. The system comprises an alkali liquor spray feeding system, fed soil is sent to a rotary kiln type thermal desorption chamber after alkali liquor spray stirring, a combustion chamber produces high-temperature flue gas to provide heat to indirectly heat a rotary kiln, and organic matter is degraded to be desorbed from polluted soil under the synergistic effect of heating and alkali liquor catalysis; the thermal desorption chamber is provided with a desorption gas outlet connected with a tail gas treatment system, the tail gas treatment system performs spray cooling on thermal desorption gas to condensate and transfer organic matter to sewage, and one part of producedsewage is recycled and the other part is used for humidifying discharged materials after the sewage is sent to a sewage treatment purification system for purification. The synergistic indirect thermaldesorption soil remediation system can significantly improve the soil treatment capacity, effectively reduce thermal adsorption temperature of organic matter polluted soil and save energy consumption.

Description

Technical field [0001] The invention belongs to the technical field of soil restoration, and specifically relates to a cooperative indirect thermal desorption soil restoration system and a restoration method thereof. Background technique [0002] Organic pollutants, especially PCBs (chlorinated biphenyls) persistent organic pollutants, have stable physical and chemical properties, are difficult to decompose, are extremely difficult to dissolve in water, have a strong affinity for fat, and are easy to accumulate in fat and cause damage The skin and liver cause poisoning and are carcinogens. Remediation of organic contaminated soil technology is mainly divided into three categories: physical remediation, chemical remediation and biological remediation, and joint remediation technologies based on the above technologies. Among them, thermal desorption repair technology has the advantages of wide application range of pollutants, high removal efficiency, short repair period, etc., and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/06B09C1/08B09C1/00
CPCB09C1/06B09C1/08B09C1/005
Inventor 张长富陈纪赛周永贤胡孙
Owner CSSC NANJING LUZHOU ENVIRONMENT PROTECTION CO LTD
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