Solar heat collection remediation device for heavy metal and organic matter combined contaminated soil

Abstract

The invention discloses a solar heat collection remediation device for heavy metal and organic matter combined contaminated soil. The solar heat collection remediation device comprises a stirring barrel, a stirring machine, a heating system and a waste gas treatment device. The stirring barrel is a barrel body which is formed by sequentially connecting three sections of pipelines and has two closed ends, and the three sections of pipelines are respectively a first pipeline, a second pipeline and a third pipeline in sequence; the second pipeline is of a coaxial double-layer sleeve structure composed of an outer pipe and an inner pipe. The stirring machine is positioned in the axial center of the stirring barrel; the heating system comprises a plurality of vacuum solar heat collecting pipes, an electric auxiliary heating device, a temperature detector and a controller; the vacuum solar heat collecting pipe consists of a glass outer pipe and a metal inner pipe; the metal inner pipe is communicated with the outer pipe of the second pipeline to form a circulating heating channel in which a heat transfer medium flows; the electric auxiliary heating device and the temperature detector are arranged at the lower part in the second pipeline outer pipe of the stirring barrel; the electric auxiliary heating device and the temperature detector are both connected with the controller. The device has the advantages of energy consumption reduction, flexible process and the like.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a soil repair device, in particular to a solar heat collection repair device for compound polluted soil by heavy metals and organic matter. Background technique [0002] Heavy metal and organic compound polluted soil accounts for an increasing proportion of remediation sites, and there are many remediation methods that can be used. With the continuous development of remediation technology, integrated remediation devices are also constantly innovating. For heavy metal and organic complex polluted soil, the relatively mature and widely used process in the market is the combined process of solidification stabilization and thermal desorption / advanced oxidation. For volatile organic compounds, a lower heating temperature (about 30 ° C ~ 100 ° C) can achieve thermal desorption effect; for semi-volatile organic compounds, the strong oxidizing sulfate radicals generated by activatin...

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Problems solved by technology

However, most of the restoration sites are usually located in sunny places in the wild, but seldom use solar energy directly on the restoration site, which greatly wastes the natural energy utilization conditions.

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