Thermal Desorption Remediation Method for Chlorine Contaminated Soil

A technology of polluted soil and soil heat, which is applied in the field of remediation of polluted soil, can solve the problems of high fuel and energy consumption, and achieve the effects of reducing fuel consumption, reducing the amount of soil, and reducing water consumption

Active Publication Date: 2021-07-30
SINOPEC GUANGZHOU ENG CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the technical problems of large fuel and energy consumption in the prior art

Method used

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  • Thermal Desorption Remediation Method for Chlorine Contaminated Soil
  • Thermal Desorption Remediation Method for Chlorine Contaminated Soil
  • Thermal Desorption Remediation Method for Chlorine Contaminated Soil

Examples

Experimental program
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Effect test

Embodiment 1

[0039] 1) According to the situation of field adjustment, the polluted soil is classified by screening, among which the feeding amount of heavily polluted soil is 5t / h, and the feeding amount of lightly polluted soil is 30t / h.

[0040] 2) Heat the lightly polluted soil with 1.0MPaG steam produced by the waste heat boiler to generate 2000m3n / h of tail gas at 130°C, and the condensed water is boosted by the pump and sent back to the waste heat boiler to produce steam;

[0041] 3) The heavily polluted soil is sent to the rotary kiln, and the hot air at 1000 ° C is introduced into the rotary kiln, and the amount of hot air is 12000m 3 n / h, producing 13000m exhaust gas at 180°C 3 n / h, internal pressure of rotary kiln -60Pa;

[0042] 4) After the clean soil produced in step 2) and step 3) is qualified, it is merged into the silo for cooling, and a small amount of water is sprayed to ensure the moisture content of the repaired soil, reduce dust, and then reuse the soil.

[0043] 5)...

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Abstract

The invention discloses a thermal analysis treatment method for chlorine-containing polluted soil in the technical field of soil pollution control. According to the degree of pollution, the soil is divided into lightly polluted soil and heavily polluted soil; the lightly polluted soil is heated by steam, and the heated soil is clean soil; The heavily polluted soil is sent to the rotary kiln for heating, the tail gas is controlled at 150-400°C, and sent to the cyclone separator for dust removal; the tail gas at the outlet of the cyclone separator is sent to the incinerator, the heat source of the incinerator uses fuel as the heat source, and the excess oxygen in the tail gas is used as the oxygen Source, incinerator outlet tail gas temperature control 850 ℃ ~ 1600 ℃. By adopting the method of the invention, the fuel consumption and water consumption can be reduced by more than 50% and the water consumption can be reduced by more than 90%, while effectively avoiding secondary pollution such as dioxin.

Description

technical field [0001] The invention belongs to the technical field of remediation of polluted soil, and in particular relates to a remediation method of chlorine-containing polluted soil. Background technique [0002] With the rapid development of my country's economy and the acceleration of urbanization, due to the needs of urban industrial layout and industry adjustment, industrial upgrading and transformation, human settlement safety and environmental protection, in the late 1990s, especially after 2000, my country's various Large cities have successively implemented the policies of "retreating from the second to the third" and "retreating from the city and entering the industrial park", and planned to relocate the heavy polluting enterprises that are difficult to control in the urban area. The enterprises that have been closed down and relocated involve various industries such as chemical industry, metallurgy, petroleum, transportation, and light industry. During the lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/06B09C1/00
CPCB09C1/005B09C1/065
Inventor 胡敏王刻文朱雷鸣王成欢
Owner SINOPEC GUANGZHOU ENG CO LTD
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