Experimental device for monitoring transport law of pollutants in variable-gap space

Abstract

The invention discloses an experimental device for monitoring the transport law of pollutants in a variable-gap space, which comprises a box body, a shaft rotation control mechanism, a disc group, a water inlet device and a drainage device, wherein the bottom of the box body is sunken inwards to form a sunken part, and a through hole is formed in the bottom of the sunken part; the shaft rotation control mechanism comprises a hollow rotating shaft, a motor and a bearing, the first end of the hollow rotating shaft is connected with the motor through the bearing, and the second end of the hollowrotating shaft passes through the through hole in the bottom of the sunken part of the box body and extends into the box body; the disc group comprises a first disc and a second disc which have periodicity in the circumferential direction and the radial direction; the hollow rotating shaft penetrates through the center of the second disc and is fixedly connected with the second disc; a gap space is formed between the first disc and the second disc; the water inlet device comprises a water inlet pipe and a water pump; and the drainage device comprises a drainage pipe. The change of the medium void space of the device has periodicity and is known and actively changed, and the device can effectively observe the pollutant transport condition in 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...

AI Technical Summary

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

Images