In Situ Treatment Apparatus applying Pneumatic Fracturing and Forced Extraction for oil contaminated Soil

Abstract

The present invention relates to an infusion tank for injecting air for ground breaking and a medium for purification treatment, which is buried in contaminated soil in an oil such as gasoline or diesel; an air injector connected to the injection port for supplying high pressure air for underground crushing, a pressure vessel, and a compressed air control valve; an oxidant injector and a pump foroxidizing the contaminated soil; a microorganism injector and a pump connected to the injection well for biologically treating the contaminated soil; a nutrient injector and a pump for feeding microorganisms; an extracting unit for extracting volatiles from the soil outwards during the contaminated soil treatment; a vacuum pump for generating a vacuum in the extraction well to induce underground crushing; a gas-liquid separation tank and a pump for separating gas and liquid in the extracted volatiles; an activated carbon adsorption vessel for treating the volatilized gas; and an automatic control device and a field instrument. According to the invention, pollutants can be highly efficiently and stably removed, processing time is shortened and processing cost is reduced.

Description

technical field [0001] The present invention relates to a purification method for in-situ purification of soil polluted by gasoline, diesel oil, etc., more specifically, an in-situ oil-contaminated soil purification device using air pressure underground crushing and forced suction, as an The oil-contaminated soil is a technology that can be applied to sandy soil, muddy soil or clay soil. Injection wells and extraction wells are set up in situ on the contaminated soil, and while the injection wells are used to inject pressured air, the Lifting the well to force air suction, creating underground broken and smoothly guiding pores in the polluted soil, so as to ensure the water permeability of the soil above a certain value, through which the oxygen, microorganisms, nutrients and oxidants as the treatment medium are exposed to pollution In order to purify the soil, an extraction well is set up adjacent to the injection well. When the injection well uses compressed air to implement...

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Problems solved by technology

[0015] Therefore, the present invention is made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a purification device that solves the problem of ensuring that the hydraulic conductivity, which is the core element in in-situ underground treatment, is equal to or greater than a certain value. , and combined use of physical, chemical and biological treatment technologies for each pollution characteristic

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