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Remediation device and remediation method for LNAPL-polluted underground water

A restoration method and groundwater technology, applied in the direction of contaminated groundwater/leachate treatment, water pollutants, water/sewage treatment, etc., can solve the problem of long treatment and restoration period, high long-term operation cost of restoration, trailing or rebound of groundwater restoration and other problems to achieve the effect of shortening the repair cycle, realizing pollution reduction, and reducing treatment costs

Active Publication Date: 2021-07-09
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional groundwater pumping treatment technology has problems such as long treatment and restoration period, high long-term operation cost of restoration, and tailing or rebound of groundwater restoration in the restoration of LNAPL polluted groundwater.

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  • Remediation device and remediation method for LNAPL-polluted underground water
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  • Remediation device and remediation method for LNAPL-polluted underground water

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Embodiment Construction

[0046]In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0047] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counter...

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Abstract

The invention relates to a remediation device and a remediation method for LNAPL-polluted underground water. The remediation device comprises an extraction pipe, a sleeve and an extraction box, wherein a pipe orifice at the lower end of the extraction pipe penetrates through the sleeve and extends into the extraction box; a first gas passing channel and a second gas passing channel are arranged on the extraction box, the first gas passing channel is used for communicating an inner cavity of the extraction box with an external area above the extraction box, and the second gas passing channel is used for communicating the inner cavity of the extraction box with an external area below the extraction box; in the process that the extraction box descends into a well, the first gas passing channel and the second gas passing channel are in an open state; and in the extraction process of the extraction box, the first gas passing channel and the second gas passing channel are in a closed state. According to the remediation device, the LNAPL phase pollutants which are dispersed from LNAPL pollution sources and are difficult to arrange extraction wells can be conveniently and efficiently extracted; and efficient extraction of the LNAPL phase in a specific direction can also be realized, the extraction effect of the LNAPL is enhanced, and extraction of underground water in the extraction process is reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a repair device and a repair method for groundwater polluted by LNAPL. Background technique [0002] Groundwater is an important source of drinking water and natural resources in my country. With the rapid development of society and economy in our country, the discharge of key pollution sources such as petrochemical and other high-pollution industries has led to increasingly serious groundwater pollution. The polluted groundwater mainly contains substances such as benzene , Toluene, carbon tetrachloride, trichlorethylene and other high-concentration pollutants, especially LNAPL, have greatly increased the difficulty and cost of groundwater restoration, posing a serious threat to ecological safety, environmental safety, human settlement safety and drinking water safety. [0003] Among them, the groundwater extraction treatment technology is widely used as a groundwater pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C02F103/06C02F101/30
CPCC02F1/00C02F2103/06C02F2101/30C02F2201/002C02F2201/004C02F2301/063
Inventor 侯德义张琪王轶冬侯仁杰
Owner TSINGHUA UNIV
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