Underground water pollution in-situ restoration method based on synchronous shattering hydrodynamic circulation

Abstract

The invention relates to an underground water pollution in-situ restoration method based on synchronous shattering hydrodynamic circulation, which comprises steps as follows: a hydrodynamic shattering well and a pneumatic stripping circulation well are made in a polluted underground water region; a hydrodynamic shattering paired well is selected to carry out synchronous hydrodynamic fracturing, so that the soil layer generates a crack; a surfactant is injected into the hydrodynamic shattering well and / or pneumatic stripping circulation well; the pneumatic stripping circulation well is provided with an upper screen and a lower screen, the inner well is connected with an aeration pump, and the outer well is connected with a suction pump; and the pneumatic stripping circulation well is started to perform continuous aeration in the well, so that underground water enters from the lower screen and flows out from the upper screen to form an upward circulation, and volatile gas is stripped out through the upper screen and sucked to the outside by the suction equipment to be treated. In the method provided by the invention, the synchronous fracturing effectively overcomes the defect of narrow pores in the underground soil layer; and the hydrodynamic circulation is formed in the pneumatic stripping circulation well, VOC (volatile organic compound) is subjected to pneumatic stripping in the water circulation state, and the surfactant is synchronously injected, thereby greatly enhancing the restorability of the VOC.

Description

technical field [0001] The invention belongs to the technical field of soil and groundwater restoration, and relates to a soil or groundwater restoration method, in particular to an in-situ restoration method for groundwater pollution based on a synchronous shattering hydrodynamic cycle. Background technique [0002] As the contradiction between the environment and human development becomes more and more prominent and acute in all aspects, the pollution problem has also attracted more and more attention. At present, my country's soil and groundwater pollution has shown a trend of transferring toxic chemical and heavy metal pollution from industry to agriculture, from urban areas to rural areas, from surface to underground, from upstream to downstream, and from soil and water pollution to the food chain, gradually accumulating. pollution is evolving into frequent outbreaks of pollution accidents. However, organic pollution in soil and groundwater often has the characteristics...

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Problems solved by technology

[0008] The purpose of the present invention is to address the above-mentioned deficiencies of the prior art, to provide a method for in-situ restoration of groundwater combining synchronous shattering and hydrodynamic cycle aeration, and to solve the problem of poor soil permeability and hydraulic transmission of energy in the existing AS technology. To solve the technical problems of large loss and low repair efficiency, enhance the repair efficiency of aeration, and improve the repair ability of in-situ treatment of volatile organic compounds in soil and groundwater

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