In-situ thermal desorption remediation system and method for organic contaminated soil

Abstract

The invention relates to an in-situ thermal desorption remediation system and method for organic contaminated soil. The in-situ thermal desorption remediation system comprises a power supply and distribution system, a heating system, an extraction system, a tail gas and tail water treatment system, a monitoring system and a ground blocking system. The heating system is composed of a vertical heating well, a high-frequency electromagnetic field generator arranged in the heating well and a generator control device. The electromagnetic field generator is connected to the power supply and distribution system on the ground through a control box; an output end power supply rectifies, filters and inverts power-frequency alternating current into high-frequency alternating current through a controlpanel, the high-frequency alternating current is connected to an electromagnetic heating coil through a connecting wire to generate an alternating magnetic field; and a conductor generates eddy current under electromagnetic induction to cause heating of the conductor, so that temperature is transferred in soil, the soil is rapidly heated, and organic pollutants are evaporated. According to the technical scheme, heating of the target repair depth is targeted, the heating speed is high, the heat utilization efficiency is high, and the repair efficiency can be remarkably improved.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a system and method for in-situ remediation of polluted soil by using the eddy current effect generated by a high-frequency strong magnetic field generator to heat. Background technique [0002] In recent years, it is imminent to seek a contaminated site remediation technology with good effect, low cost and little impact on the environment. At present, some traditional in-situ remediation technologies, such as in-situ injection of chemical agents and multiphase extraction, have been applied in the remediation of many contaminated sites. However, these technologies face problems such as the small influence radius due to the small soil permeability coefficient, and the difficulty in fully contacting the pollutants with the remediation agent, which affects the remediation effect. [0003] In-situ thermal desorption technology is getting more and more attention in the remed...

AI Technical Summary

Problems solved by technology

At present, in situ thermal desorption engineering cases, most of the heating wells are heated around the whole body, and the heating depth range is not targeted, resulting in long heating time, low efficiency, and energy waste.

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