A solar heat collection repair device for heavy metal and organic compound polluted soil

Abstract

The invention discloses a solar heat collection and repair device for compound polluted soil by heavy metals and organic matter, which includes a mixing tank, a mixer, a heating system and a waste gas treatment device; The three sections of pipelines are the first pipeline, the second pipeline and the third pipeline in turn; the second pipeline is a coaxial double-layer casing structure composed of an outer pipe and an inner pipe; the mixer is located in the axial center of the mixing tank; the heating system includes several Vacuum solar collector tube, electric auxiliary heating device, temperature detector and controller; the vacuum solar collector tube is composed of a glass outer tube and a metal inner tube; the metal inner tube communicates with the outer tube of the second pipeline to form a circulation heating channel, and there is The heat transfer medium flows; the electric auxiliary heating device and the temperature detector are arranged at the lower part of the outer pipe of the second pipeline of the mixing tank; the electric auxiliary heating device and the temperature detector are both connected with the controller. The invention has the advantages of energy saving, 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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