Electromagnetic thermal desorption remediation method and device used for remediating contaminated sites

Abstract

The invention provides an electromagnetic thermal desorption device used for remediating contaminated sites. Contaminated soil is heated, stirred and conveyed in a ferromagnetic material stirring device and a tank body through electromagnetism. Through heating the contaminated soil in the device, the thermal desorption heat transfer property and the organic pollutant separating effect are improved. The electromagnetic thermal desorption device comprises a material conveying device, an electromagnetic heating device and an exhaust gas treating and purifying device, wherein the electromagnetic heating device comprises an excitation controller, a heating coil, a thermal insulating material, a heating and conveying device, a temperature probe, a circulating water cooler and the like; and the exhaust gas treating and purifying device comprises an exhaust gas collecting pipe, a dust precipitator, a condenser, a collector, a catalytic oxidation device and the like. For heavy metal, low-melting-point glass powder and natural mirabilite powder are added, glassy substances are formed after temperature is raised through heating, the glassy substances solidify, and heavy metal pollutants are eliminated. The electromagnetic thermal desorption device has the characteristics of high heating speed, high heat transfer effect and small exhaust gas output. The size of a system is small, a moving treatment platform can be integrated, and integral transporting in-situ operation is realized.

Description

technical field [0001] The invention relates to the technical field of remediation of polluted sites, in particular to an environment remediation method and device for heating polluted soil or sludge and separating pollutants therefrom through electromagnetic heating technology. Background technique [0002] With the acceleration of industrialization and urbanization in my country, the adjustment of urban planning and urban layout, the relocation of a large number of polluting enterprises, leaving behind a large number of polluted industrial sites, the problem of polluted soil is becoming more and more serious, coupled with the frequent occurrence of sudden pollution incidents in our country, Sudden water pollution incidents and petrochemical plant explosions occur from time to time, causing serious environmental hazards. Common pollutants in explosion-type or accident-type pollution sites include alkanes, benzene series, polycyclic aromatic hydrocarbons and other semi-volatil...

AI Technical Summary

Problems solved by technology

At present, the thermal desorption technology has a large device volume, high installation and disassembly costs, and a long construction period. In the actual treatment process, the treatment cost is generally too high, resulting in a huge funding gap for contaminated soil treatment.

At present, in domestic soil pollution control, thermal desorption has problems such as complex equipment, unsuitable disassembly, high energy consumption, etc., and there are deficiencies in cost and application convenience.

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