In-situ heating combined double-phase vacuum drawing soil restoration device and method
A technology of vacuum suction and soil remediation, applied in the restoration of polluted soil, etc., can solve the problems of high treatment cost, secondary pollution, unfavorable application, etc. Effect
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[0029] First, conduct a site survey on the contaminated site to be treated, and determine that the area of the contaminated site to be treated is about 200m 2 , the pollutants are mainly concentrated at 2-5m underground; the main pollutants are total petroleum hydrocarbons, the content can reach 1786~40167mg / kg; polycyclic aromatic hydrocarbons, the content can reach 26.10mg / kg, and the soil also contains mercury, which can reach 2~2.69mg / kg. The polluted site is left after the relocation of the production workshop of the pesticide chemical factory, and the site is square in shape. Utilize the method of the present invention to repair it, and concrete steps are as follows:
[0030] (1) Divide the contaminated site to be treated into four small squares on average, and set a heating well 4 at the center of each small square. The depth of the heating well is 6m, and the diameter is about 90cm. The heating well 4 is 2-6m underground. 2m long transverse conduits 10 are laid eve...
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