Rotary type polluted soil thermal desorption experiment device and experiment method

An experimental device and thermal desorption technology, applied in the field of rotary contaminated soil thermal desorption experimental device, can solve the problems of inability to achieve thermal desorption, lack of broad-spectrum adaptability, etc., and achieve the effect of all-round control and parameter optimization

Active Publication Date: 2015-02-04
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the temperature of the thermal desorption device currently developed is below 600 degrees. Since many polluted sites are polluted by complex organic matter and heavy metals, the existing thermal desorption device is not suitable for many highly volatile organic polluted soils and heavy metal pollutants. Can not achieve the effect of complete thermal desorption
That is: the existing thermal desorption experimental device does not have broad-spectrum adaptability

Method used

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  • Rotary type polluted soil thermal desorption experiment device and experiment method
  • Rotary type polluted soil thermal desorption experiment device and experiment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 , figure 2 A rotary contaminated soil thermal analysis experimental device is used to collect gas generated by thermal analysis of organic polluted soil, including a rotary kiln for high temperature thermal analysis of contaminated soil, a feeding device, and a gas processing device.

[0033]The length of the rotary kiln cylinder is L=3200mm. The rotary kiln includes a corundum furnace tube 11, a layer of mullite refractory layer 12 is arranged inside the corundum furnace tube, and an inner layer of alumina fiber is coated outside the corundum furnace tube for heat preservation. Material 13, the inner layer of alumina fiber insulation material is coated with a stainless steel outer cylinder 14, the outer layer of stainless steel outer cylinder is coated with an outer layer of alumina fiber insulation material 15, and the outer layer of alumina fiber insulation material is The material is covered with a stainless steel jacket 16 . The rotary kiln is e...

Embodiment 2

[0070] An experimental method for thermal analysis of polluted soil, the polluted soil is determined by GC-MS to belong to the low-boiling-point organic matter polluted soil; the organic pollutants in the polluted soil contain 53.27 mg / kg of benzene, 12.88 mg / kg of toluene, and 6.45 mg / kg of others .

[0071]Adjust the inclination angle α of the rotary kiln to 3.5°, so that the time for the contaminated soil to pass through the rotary kiln is controlled at 30 minutes, even if the contaminated soil is kept at the temperature of the thermal analysis experiment for 30 minutes.

[0072] Air is input from the thermal analysis atmosphere gas input port of the combustion mixing chamber.

[0073] The contaminated soil is evenly fed into the rotary kiln through the feeder for thermal heating, and the heated contaminated soil is discharged from the discharge port of the rotary kiln.

[0074] 11 thermal analysis experiments were carried out on the polluted soil, and the thermal analysis...

Embodiment 3

[0079] An experimental method for thermal analysis of polluted soil. The polluted soil is determined by GC-MS to belong to the polluted soil of medium-boiling point organic substances; the polluted soil contains 49.15 mg / kg of fluorene, 19.8 mg / kg of pyrene, and 13.5 mg / kg of anthracene.

[0080] Adjust the inclination angle α of the rotary kiln to 3°, so that the time for the contaminated soil to pass through the rotary kiln is controlled at 30 minutes, even if the contaminated soil is kept at the temperature of the thermal analysis experiment for 30 minutes.

[0081] The thermal analysis atmosphere gas is input from the thermal analysis atmosphere gas input port of the combustion mixing chamber. The thermal analysis atmosphere gas contains 3.1% oxygen, 24.2% carbon dioxide, 7.8% water vapor, and the rest is nitrogen.

[0082] The contaminated soil is evenly fed into the rotary kiln through the feeder for thermal heating, and the heated contaminated soil is discharged from the...

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Abstract

The invention relates to a rotary type polluted soil thermal desorption experiment device and an experiment method. The rotary type polluted soil thermal desorption experiment device comprises a rotary kiln used for performing high-temperature thermal desorption on polluted soil, a feeding device and a gas processing device, wherein an inclination angle is formed between a rotary center line of the rotary kiln and a horizontal plane; a combustor is arranged at a discharging end of the rotary kiln, a gas collecting chamber communicated with the feeding hole is arranged at the feeding end of the rotary kiln; the feeding device comprises a feeding machine and a feeding guide pipe; the gas processing device comprises an induced draft fan, a gas filtering device, a gas cooling device, a gas sampling hole and a flow meter. The rotary type polluted soil thermal desorption experiment device has the beneficial effects that a thermal desorption experiment device which is used in a laboratory, and can continuously run and perform a sectional high-temperature treatment is adopted for analyzing various kinds of polluted soil containing organic matters and heavy metals, and can obtain thermal adsorption parameters of different kinds of polluted soil, thus all-dimensional control and parameter optimization of precision control and continuous running of a polluted soil thermal desorption remediation process are realized.

Description

technical field [0001] The invention belongs to the field of solid waste reuse, and in particular relates to a rotary type polluted soil thermal analysis experimental device and an experimental method. Background technique [0002] Soil is the material basis for human survival and an important part of the human ecological environment. With the development of industry and agriculture and the expansion of urbanization, the widespread use of chemical fertilizers and pesticides in agriculture, the invasion of farmland by toxic and harmful substances in industrial wastewater, and the leakage of toxic and harmful substances caused by solid waste dumping and landfills, etc., make various pollutants pass through different Pathways continue to accumulate in the soil, soil purification capacity is becoming increasingly saturated, and soil quality has declined significantly. The status of soil pollution in my country has begun to pose a threat to the sustainable use of land resources an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/06G01N25/00F27B7/00F27B7/32
Inventor 李春萍陈晓东姜雨生田梦笔郭荣黄乐
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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