Energy-saving in-situ thermal desorption treatment device and energy-saving in-situ thermal desorption treatment method for greasy dirty contaminated soil

Abstract

The invention discloses an energy-saving in-situ thermal desorption treatment device and an energy-saving in-situ thermal desorption treatment method for greasy dirty contaminated soil. The energy-saving in-situ thermal desorption treatment device comprises a heating assembly, an extraction assembly, a smoke emission assembly, an inert gas blowing-in assembly, a monitoring assembly and a contaminated gas treatment assembly; the heating assembly comprises heating pipes; the heating pipes are arranged in the greasy dirty contaminated soil; the extraction assembly comprises extraction tubes; theextraction tubes are arranged in the greasy dirty contaminated soil; the flue gas emission assembly comprises smoke return pipes; the smoke return pipes communicate with the heating pipes; the monitoring assembly is arranged in the greasy dirty contaminated soil; and the contaminated gas treatment assembly communicates with the extraction assembly. The energy-saving in-situ thermal desorption treatment method comprises the steps that a greasy dirty contaminated soil hillock is established in a different place on the spot; in the process of establishing the greasy dirty contaminated soil hillock, the energy-saving in-situ thermal desorption treatment device for the greasy dirty contaminated soil disclosed by the invention is arranged; a thermal insulation layer and a sealing layer are sequentially arranged outside the established hillock; and the hillock is heated, and volatile components of greasy dirt in the soil after being heated enter the contaminated gas treatment assembly via theextraction assembly, so that greasy dirt recovery is achieved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an energy-saving in-situ thermal desorption treatment device and treatment method for oil polluted soil. Background technique [0002] The pollution of petroleum hydrocarbons to soil has different characteristics from other soil pollution, mainly manifested in the penetration of the soil surface. Petroleum hydrocarbons often fill almost all the pores in the soil on a certain area and at a certain depth, blocking most of the soil. At the same time, due to the viscosity of petroleum hydrocarbons, the originally scattered soil particles in the soil are glued together, changing the original structural characteristics of the soil. Petroleum hydrocarbon components are often very complex, and this complexity is intertwined with the complexity of the contaminated soil structure. Therefore, the treatment of petroleum hydrocarbon-contaminated soil puts forward ...

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Problems solved by technology

Common indirect thermal desorption technologies are mainly operated in ectopic excavation and transshipment. The hardening area of ​​the equipment is large, and there is a risk of secondary pollution during the transportation process. If the transportation distance is long, the construction cost will be increased.

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