Vacuum type salinized soil desalting device and using method thereof

Abstract

The invention relates to a vacuum type salinized soil desalting device and a using method thereof. The desalting device comprises a water supply pool, a desalting pool, a water return pool and a vacuum pump; the pool bottom of the desalting pool is communicated with the water supply pool through a water inlet pipe; the desalting pool is internally provided with a lower filter layer, a soil sampleand an upper filter layer in sequence from bottom to top; a top cover is arranged above the upper filter layer; a water return pipe communicated with the inner parts of the desalting pool and the water return pool is arranged on the top cover; and an extraction opening communicated with the air inlet end of the vacuum pump is formed in the top plate of the water return pool. The desalting device is not only capable of completing the desalting processing of various types of salinized soil, but also capable of summarizing the change laws of the soil masses along with the time in the desalting process of the salinized soil through recording the conductivity values; through using the vacuum pump, a relatively large pressure difference is formed in the device, so that the desalting process is accelerated and the water for the test is saved; and through setting porous stones and filter paper, the soil particle loss is decreased, the influences, on the contents of the soil masses with different particle sizes, of the desalting process are decreased, and the reliability of the test is improved.

Description

technical field [0001] The invention relates to the technical field of soil testing, in particular to a vacuum type saline soil desalination device and a use method thereof. Background technique [0002] According to statistics, the area of ​​saline soil accounts for about 2% of the country's land area, 20% of my country's cultivated land has different degrees of salinization and secondary salinization, and 260 million mu of land will be threatened by potential salinization. Therefore, in recent years, the research on saline soil has been increasing day by day, and the research scope has also expanded from agriculture to many fields such as civil engineering. [0003] Soil is often defined as various types due to the different types and degrees of salt content, and different types of saline soil often have different material properties. Therefore, it has become a hotspot in the field of geotechnical engineering to study the influence of salt on the mechanical properties of ...

AI Technical Summary

Problems solved by technology

Although this method is simple to operate, there are many problems

One is that every time the water is changed, it takes a lot of time to fully soak the soil; the other is that every time the water is changed, the pure water that is many times that of the soil is used, which wastes a lot of water resources; the third is the waste water after soaking Due to the lack of filtration, soil particles are prone to loss, which affects the accuracy of the test

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