Soil pollution thermal desorption restoration processing system

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...

AI Technical Summary

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 polluted sites.

[0005] Relevant literature search shows that before the date of application for this patent, no literature on thermal desorption treatment system with similar structure to the present invention has been found.

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