Underground water pollution in-situ restoration device based on synchronous shattering and hydrodynamic circulating

Abstract

An underground water pollution in-situ restoration device based on synchronous shattering and hydrodynamic circulating comprises more than two hydrodynamic shattering wells and more than one pneumatic stripping circulating well; each pneumatic stripping circulating well is a double-layer well, an upper-layer screen stencil and a lower-layer screen stencil are arranged in the pneumatic stripping circulating well, an air pump is connected to the inner well of the pneumatic stripping circulating well, and the outer well of the pneumatic stripping circulating well is connected to an extraction pump and is in pipe connection with a gas treatment device outside the pneumatic stripping circulating well; each hydrodynamic shattering well is provided with a fracture layer in a low-permeability soil layer, the fracture layer is formed through hydrodynamic fracturing, and fracturing propping agent is injected into fractures; the fractures are formed through synchronous hydrodynamic fracturing of each two paired hydrodynamic shattering wells; and the device further comprises a hydrodynamic fracturing pump, a surface active agent adding tank and the like. The device provided by the invention has the advantages that the defect of narrow underground soil layer aperture passage is effectively solved due to the synchronous fracturing wells (namely the hydrodynamic shattering wells), pneumatic stripping of VOC (Volatile Organic Compounds) can be performed by the pneumatic stripping circulating wells under a hydrodynamic circulating condition, and the VOC restoration capability is greatly improved in combination with synchronous injection of surface active agent.

Description

technical field [0001] The invention belongs to the technical field of soil and groundwater restoration, and relates to a soil or groundwater restoration device, in particular to an in-situ restoration device 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

[0007] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, and provide a device for in-situ repairing groundwater based on the combination of synchronous shattering and hydrodynamic cycle aeration, so as to solve the problem that the existing AS device cannot solve the problem of soil layer in the repairing process. Due to the technical problems of poor permeability, large loss of hydraulic transmission energy and low repair efficiency, the device of the present invention can 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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