System for restoring organic contaminated soil by forced ventilation and spiral stirring thermal desorption

Abstract

The invention provides a system for restoring organic contaminated soil by forced ventilation and spiral stirring thermal desorption, which comprises an air preheating system, a spiral stirring thermal desorption system, a tail gas treatment system and a control system, wherein the air preheating system consists of a blower and an air heater, the spiral stirring thermal desorption system consistsof a spiral stirring thermal desorption device and a draft fan, the tail gas treatment system consists of a cyclone dust collector, a dehumidifier and an absorption tower, and the control system can realize the effective control of the rotation speed of a spiral stirrer, the air preheating temperature and the soil heating temperature. The system can be used for restoring soil contaminated by volatile / semi-volatile organic matters.

Description

technical field [0001] The present invention relates to a system for repairing soil polluted by volatile / semi-volatile organic pollutants, more specifically a forced ventilation-spiral stirring thermal desorption repairing method for repairing organic polluted soil by using forced ventilation and electric heating System of organically polluted soil. Background technique In recent years, with the acceleration of industrialization and urbanization in our country, urban planning, urban expansion, adjustment of functional areas and urban layout, a large number of polluting enterprises have been relocated, and a large number of polluted industrial sites have been left behind. The resulting environmental pollution accidents and The harm to human health has become a major factor restricting the development and utilization of urban land. According to the survey, the pollutants left by the relocation of polluting enterprises mainly involve organic pollutants and heavy metals, amon...

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Problems solved by technology

In this patent, the temperature of the hot air is generally lower than 350°C, and because the specific heat capacity of the air is small, the temperature of the soil after heating will not be too high, so it can only treat benzene and benzene series with a low boiling point in the polluted soil, which cannot meet the requirements of the city. Requirements for Complexity and Diversity of Organic Pollutants in Contaminated Sites

Retrieval of relevant literature shows that no literature on the organic contaminated soil remediation system with a structure similar to the present invention has been found before the patent application date

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