Intelligent experimental device for real-time measurement of colloid penetration in sand column and its operation method

Abstract

The invention discloses an intelligent experimental device for real-time measurement of colloid penetration in a sand column, which is provided with an overflow buffer device to prevent abnormal deposition of colloid in the sand column section. The device measures the concentration, temperature, and pH value of colloids migrating in the sand column in an intelligent real-time manner, and takes samples at the end of the experiment to measure the amount and particle size distribution of colloids retained along the process, which can effectively reveal the colloids in porous media. the migration mechanism. The invention also discloses the operation method of the experimental device, which can measure the quantity and particle size distribution of the retained colloid along the course, and solves the problem that the parameters along the course of the colloid are difficult to measure in previous sand column experiments.

Description

technical field [0001] The invention belongs to the technical fields of water conservancy engineering, environmental engineering and agricultural engineering, and in particular relates to an intelligent experimental device for real-time measurement of colloid penetration in a sand column. Background technique [0002] In the past, many scholars explored the interception of colloids in porous media through sand column experiments. They only measured the concentration of the tail water in the experiment to calculate the interception of colloids, and regarded the migration process of colloids in sand columns as a black box. Without further exploration, it is impossible to explore the stratification of colloids during the migration process and the change of particle size, and in the specific implementation process, there are still the following difficulties. Many parameters are difficult to measure directly, and cumbersome operations and certain reasoning are required conversion...

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Problems solved by technology

[0002] In the past, many scholars explored the interception of colloids in porous media through sand column experiments. They only measured the concentration of the tail water in the experiment to calculate the interception of colloids, and regarded the migration process of colloids in sand columns as a black box. Without further exploration, it is impossible to explore the stratification of colloids during the migration process and the change of particle size, and in the specific implementation process, there are still the following difficulties. Many parameters are difficult to measure directly, and cumbersome operations and certain reasoning are required transformation to obtain, indicating that the measurement error is large

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