An experimental device for monitoring the transport law of pollutants in variable void spaces

Abstract

The invention discloses an experimental device for monitoring the movement law of pollutants in a variable void space, which includes a box body, a shaft rotation control mechanism, a disc group, a water inlet device, and a drainage device. There is a through hole at the bottom of the part; the shaft rotation control mechanism includes a hollow shaft, a motor and a bearing. The first end of the hollow shaft is connected to the motor through the bearing, and the second end extends to the inside of the box through the through hole at the bottom of the concave part of the box; the disc The group includes a first disk and a second disk with periodic shapes in the circumferential and radial directions; the hollow shaft passes through the center of the second disk and is fixedly connected to the second disk; the connection between the first disk and the second disk A void space is formed between them; the water inlet device includes a water inlet pipe and a water pump, and the drainage device includes a drain pipe. The change of the void space of the medium in the device of the invention is periodic, known and actively changed, and the device can effectively observe the movement of pollutants during the change process of the void space.

Description

technical field [0001] The invention relates to an experimental device for detecting groundwater, in particular to an experimental device for monitoring the migration law of pollutants in variable void spaces. Background technique [0002] Groundwater exists in the void space of the underground medium. When pollutants invade the groundwater, their migration paths mainly occur in the void space of the underground medium. Therefore, the void space of the underground medium has an important impact on the transport of pollutants. However, the size and shape of the void space in the underground medium are not static. When the underground aquifer is disturbed by external forces, the size and shape of the void space in the underground medium will change. During the water process, due to the change of effective pore stress, the void space of the clay confined aquifer changes, and this change will affect the transport process of pollutants intruding into the groundwater. Although th...

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Problems solved by technology

However, the size and shape of the void space in the underground medium are not static. When the underground aquifer is disturbed by external forces, the size and shape of the void space in the underground medium will change. During the water process, due to the change of effective pore stress, the void space of the clay confined aquifer changes, and this change will affect the transport process of pollutants intruding into the groundwater

Although this problem has been widely concerned, how to study and observe the pollutant migration law in the process of changing the void space of underground media in the laboratory has not been effectively resolved.

At present, domestic and foreign studies on the pollutant migration law in the process of void space change are mainly to passively change the size of the void space, or to use external forces to induce changes in the void space of the underground medium, and then observe the pollutant migration law, which cannot be determined in the void space. In the process of spatial change, effectively observe the process of pollutant migration

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