Soil pollution thermal desorption restoration processing system

A soil pollution and treatment system technology, applied in the field of repair treatment system, can solve the problems of small treatment capacity, unable to meet the large-scale engineering application needs of polluted sites, and no thermal desorption treatment system has been found, so as to achieve good applicability and eliminate The effect of the secondary pollution problem

Inactive Publication Date: 2009-09-16
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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Problems solved by technology

This patent mainly uses the method of vacuum extraction to treat volatile/semi-volatile organic polluted soil, and the treatment capacity is small, which cannot meet the large-scale engineering application needs of p...

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  • Soil pollution thermal desorption restoration processing system

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Embodiment Construction

[0026] The present invention is further illustrated below through specific examples of implementation.

[0027] A chemical pollution site in Suzhou, the main pollutants are benzene series, such as benzene, toluene, xylene, etc.

[0028] The invention consists of a heat source system, a feed system, a thermal desorption system, a control system and a tail gas treatment device.

[0029] The feeding system consists of a hopper 1, a weighing belt scale 2, and a feeding belt conveyor 3. After the polluted soil is pretreated by the mesh screen, the particle size is less than 1cm, and then enters the weighing belt scale 2 through the hopper 1, and the feeding belt conveyor 3, and then enters the thermal desorption system. The measurement belt scale 2 is 0.5m wide and 2.0m long, placed in parallel, and the feeding belt conveyor 3 is 0.4m wide and 6.0m long, placed at 30° to 45°. Both are controlled by motors to control the transmission speed, and the motors are connected to the cont...

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Abstract

The invention relates to a soil pollution thermal desorption restoration processing system, which belongs to a soil restoration processing system. The system comprises a feed system, a heat source system and a control system, and is characterized by further comprising a thermal desorption system and a tail gas processing device, wherein the thermal desorption system consists of a draught fan and a thermal extraction converter, and the tail gas processing device consists of a dust remover and an absorption tower. When the system is applied to processing polluted soil with main pollutants of volatile/semi-volatile organic compounds, compared with the like products in other countries, the equipment cost is only 1/3 to 1/5 of the same; the problem of secondary pollution probably brought about in the process of processing the polluted soil is thoroughly avoided; a temperature control system has better practicability; the running cost for each ton of the polluted soil is between 300 and 500 RMB, which is far low than the processing cost for hazardous landfilling and incineration of the polluted soil; and half of the purification effect of processing the polluted soil with the main pollutants of the volatile/semi-volatile organic compounds can reach between 70 and 80 percent.

Description

technical field [0001] The invention relates to a remediation treatment system for volatile / semi-volatile organic polluted soil, more specifically, it heats the polluted soil to a sufficient temperature through direct or indirect heat exchange, so that the volatile / semi-volatile A soil pollution thermal desorption treatment system in which pollutants are volatilized or separated from polluted soil and treated. Background technique [0002] Since the reform and opening up, while my country's social economy has made great achievements, a large number of polluted industrial sites have been left behind. In recent years, with the acceleration of my country's industrialization and urbanization process and the implementation of the strategy of "retreating from two to three" in the transformation of urban layouts in various places, environmental pollution accidents and human health damage incidents caused by the relocation of polluting enterprises have occurred from time to time acr...

Claims

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Application Information

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IPC IPC(8): B09C1/06
Inventor 林玉锁田猛张胜田张孝飞王国庆徐建华晓梅单艳红冯艳红何跃赵欣
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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