Simulation device for soil in-situ thermal desorption remediation and application

Abstract

The invention relates to a simulation device for soil in-situ thermal desorption remediation. The device comprises an in-situ heating simulation sand tank, a support, an upper heat preservation layer,an upper cover, a heating well, an extraction well and a temperature monitoring well; the in-situ heating simulation sand tank is a hollow open cylindrical sand tank with a bottom; the lower part ofthe in-situ heating simulation sand tank is supported by the support; the upper portion of the in-situ heating simulation sand tank is provided with a cake-shaped upper heat preservation layer; the upper cover is arranged on the upper heat preservation layer; the heating well, the extraction well and the temperature monitoring well penetrate through the upper cover and the cake-shaped heat preservation layer to extend into the in-situ heating simulation sand tank. Water, electricity and operation data acquisition for operation of the device is completed by other external systems. The device iseasy to operate, convenient to use and suitable for exploration of various types of soil remediation engineering parameters and remediation process thermodynamic research.

Description

technical field [0001] The invention relates to the field of soil ecological restoration and the field of thermodynamics application research, and belongs to a simulation device for in-situ thermal desorption restoration technology of polluted sites based on the principle of heat conduction, in particular to a thermodynamic research device for simulating the process of soil in-situ thermal desorption restoration. Background technique [0002] The results of the first national soil pollution survey show that the overall national soil environment is not optimistic. Some areas have serious soil pollution, and the quality of cultivated land soil environment is worrying. With the promulgation of the "Soil Pollution Prevention and Control Action Plan", my country's soil remediation industry has entered a stage of rapid development, and thermal desorption remediation technology has also been popularized and applied, especially in-situ thermal desorption remediation technology becaus...

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Problems solved by technology

In foreign countries, this type of technology evolved from engineering practice, and there are few related studies; in China, the research on this technology is still in its infancy, and the equipment used in the early research on in-situ thermal desorption repair technology at home and abroad is relatively simple , the scale is small, and the obtained data are difficult to meet the thermodynamic application research of in-situ thermal desorption repair process

In addition, in-situ thermal desorption remediation technology consumes a lot of energy, and parameter control in remediation practice is of great significance to reduce repair costs. At present, there is a lack of equipment for exploring the engineering parameters of in-situ thermal desorption remediation technology. It is determined that it will inevitably affect the restoration effect or lead to an increase in restoration costs

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