One-dimensional simulation device for migration and transformation of solutes in underground water under high water pressure action

Abstract

The invention belongs to the technical fields of hydrogeology, geosciences, environmental science and engineering research, and provides a one-dimensional simulation device for simulating migration and transformation of solutes in underground water under the high water pressure action. The one-dimensional simulation device is high in safety. The one-dimensional simulation device for migration and transformation of the solutes in the underground water under the high water pressure action comprises a water tank, a booster pump, a one-way valve, a safety valve, an aquifer dielectric cylinder with a special flange structure, a needle-shaped valve and a sampling device which are sequentially connected in series; the booster pump and the aquifer dielectric cylinder are connected by adopting a high-pressure rubber hose, and the aquifer dielectric cylinder, flanges, a flange sampling inlet branch pipe and a flange sampling outlet branch pipe are all made of a high-pressure-resistant anti-corrosive stainless steel material. The device has the following advantages that the design is simple, operation is easy, maintenance is convenient, the water pressure is accurate in control and convenient to regulate, the maximum water pressure that the device can simulate is 10 MPa, the device is suitable for an experimental environment with the pH of 6.5-9, the high water pressure environment of the deep underground water can be effectively simulated, long-term and stable operation can be achieved, and the requirements of indoor simulation research are met.

Description

technical field [0001] The invention belongs to the technical fields of hydrogeology, earth science, environmental science and engineering research, and particularly relates to a one-dimensional simulation device for solute migration and transformation in groundwater under the action of high water pressure. Background technique [0002] Groundwater is an important source of water for industry, agriculture, and domestic use in my country. The unreasonable development and utilization of the groundwater level caused by the continuous decline and the change of the groundwater storage environment have caused the problem of groundwater quality to shift from the shallow layer to the deep layer. The indoor soil column simulation experiment of solute is an important research method to study the migration and transformation mechanism of pollutants in groundwater. The existing one-dimensional soil column simulation experiment devices are mostly limited to the simulation of shallow groun...

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Problems solved by technology

[0003] Previous studies have shown that the current one-dimensional simulation device for solutes in groundwater has the following defects: First, the soil column device used at this stage, such as the "temperature-controlled pressure-controlled groundwater flow pollution simulation" designed by Ma Chuanming et al. Although it is equipped with a pressure control device to adjust the water pressure conveniently, because the designed soil column material is plexiglass tube, which is limited to the hydraulic condition of low pressure, most of the simulations are vadose zone and the buried depth is less than 200m The groundwater environment system cannot withstand high water pressure such as 2MPa; secondly, the soil column device used at this stage, the column flange is mostly flat design, and the lining gasket between the flanges is made of pure rubber material, which cannot withstand Effect of high water pressure, easy to leak and damage

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