Impervious barrier permeability coefficient detection device and method

Abstract

The invention discloses an impervious barrier permeability coefficient detection device and method. The impervious barrier permeability coefficient detection device comprises a percolating fluid injecting unit, a sample detection unit and a collecting unit, wherein the percolating fluid injecting unit comprises two piston containers arranged in parallel and a drive pump; the sample detection unit comprises a detection bin, an inner cavity of the detection bin is separated into a high-pressure cavity and a low-pressure cavity by using a separation porous plate, the upper end of the detection bin is provided with a liquid feeding hole and an overflowing hole, the liquid feeding hole is connected with the two piston containers through liquid feeding pipelines, the lower end of the detection bin is provided with a reflowing hole and an exhaust hole, the outer side of the exhaust hole is connected with an overflowing valve, a reflowing pipeline is connected between the overflowing hole and the reflowing hole; the collecting unit comprises a percolating fluid collecting container and a weight measuring device, one port of the liquid discharging pipe is communicated with the reflowing hole; and the liquid feeding pipeline, the reflowing pipeline and the liquid discharging pipeline are respectively provided with a control valve. The impervious barrier permeability coefficient detection device is capable of changing percolation pressure difference and measuring percolation coefficients of different impervious materials under different temperatures by selecting different percolating liquids, and has the advantages of large measurement range, high measurement precision and wide application range.

Description

technical field [0001] The invention relates to a detection device, in particular to a method for measuring anti-seepage layers such as geomembrane, high-density polyethylene film, clay layer, bentonite waterproof blanket, and anti-seepage cement under the condition of different fluids and a maximum variable pressure difference of 10Mpa. A high-pressure detection device for permeability coefficient and a detection method thereof. Background technique [0002] Petroleum is the energy source that human beings rely on for survival. However, it leaks and leaks during the mining, transportation, and refining processes, which can lead to soil and groundwater pollution. Groundwater environmental problems are characterized by concealment and complexity. Once groundwater is polluted, it will take a long time to recover, and some pollution is even irreversible. Therefore, "prevention is more important than cure" of groundwater pollution. In order to prevent soil and groundwater poll...

AI Technical Summary

Problems solved by technology

[0006] 1. The lower limit of the measurement of the permeability coefficient of the existing anti-seepage coefficient detection device is 10 -9 cm / s~10 -10 cm / s, for extremely low permeability up to 1×10 -12 cm / s to 1×10 -14 The detection time of the permeability coefficient of the anti-seepage layer in cm / s is long and the detection results are inaccurate

[0007] 2. The seepage fluid used by the existing anti-seepage coefficient detection device is water, and the fluids that have not been seen are refined oil and crude oil, organic solvents, and acid / alkali solutions with pH5~pH9, etc.

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