Restoration device and repair method for groundwater polluted by lnapl

Abstract

The invention relates to a repairing device and a repairing method for groundwater polluted by LNAPL. The repair device includes an extraction tube, a sleeve and an extraction box; the lower end nozzle of the extraction tube passes through the sleeve and extends into the extraction box; the extraction box is provided with a first air passage, a second air passage Channel, the first air passage is used to communicate the inner cavity of the extraction box with the outer area above the extraction box, and the second air outlet channel is used to communicate the inner cavity of the extraction box with the outer area below the extraction box; When the extraction box is going down the well, the first air passage and the second air passage are in an open state; during the extraction process of the extraction box, the first air passage and the second air passage are in a closed state. The repair device not only facilitates the efficient extraction of LNAPL phase pollutants whose LNAPL pollution sources are scattered and difficult to deploy extraction wells; it can also achieve efficient extraction of LNAPL phases in a specific direction, which enhances the extraction effect of LNAPL and reduces the The pumping of groundwater during the process.

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...

AI Technical Summary

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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