Fully-automatic earth pillar leaching experiment device

Abstract

The invention discloses a fully-automatic earth pillar leaching experiment device. The fully-automatic earth pillar leaching experiment device comprises an automatic constant head height solution outflowing device, a detachable earth pillar body and an automatic continuous sampling device; the automatic constant head height solution outflowing device consists of a target pollutant solution containing bottle and an automatic constant head height mechanism, and the automatic constant head height mechanism consists of a magnet, a valve, a rotating wheel, a bracing wire and a buoyancy ball; and the automatic continuous sampling device consists of a sampling plate, a motor, a relay, a power supply and a timer, the motor is connected with the power supply by the relay, the timer is connected with the relay, a plurality of grooves are evenly formed in the circumference of the upper surface of the sampling plate, a first liquid level probe and a second liquid level probe are arranged in a test tube, the first liquid level probe is connected with the relay by a conductive wire, and the second liquid level probe is electrically connected with the relay by a hard conductive wire, a touch type chute and a conductive metal ball. The fully-automatic earth pillar leaching experiment device has a simple structure, is reasonable in design, convenient to use and strong in automation, saves labor force, and is applicable to popularization.

Description

technical field [0001] The invention relates to an environmental engineering and groundwater simulation experiment device, in particular to a fully automatic soil column leaching experiment device. Background technique [0002] In recent years, with the rapid development of the economy, domestic surface water and soil have been polluted to varying degrees, which threatens the development and utilization of groundwater, affects the development of cities and the health of the people. Soil column leaching experiment is an effective method for dynamic adsorption research, which can objectively reflect the adsorption capacity and retardation capacity of pollutants in simulated regional soil or riverbed sediment to a large extent, and has an important reference for environmental risk assessment value. [0003] At present, the principle of the soil column leaching test device used in the laboratory is basically the same. The soil column leaching test device generally consists of a...

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Problems solved by technology

Since the soil column is slender and only has an opening at the upper end, the soil or sediment can only be taken out from the upper end, which is not only difficult to operate, but also may cause the digging tool to be polluted by high-concentration target pollutants in the upper soil or sediment. cause experimental bias

The cleaning work in the soil column is also not easy to carry out. If the cleaning is not clean, the target pollutants remaining on the inner wall of the soil column will affect the next experiment

[0006] (3) The sampling work is heavy. The soil column leaching experiments generally require equal-volume sampling, that is, each sampling volume is the effective pore volume of the soil or sediment used in the experiment, and there is a certain difference in the time to collect each unit pore volume sample.

At present, most of the commonly used sampling containers for soil column leaching experiments are glass containers with scales (such as beakers, graduated colorimetric tubes, etc.), and the experimenters are waiting for the samples during sampling. Recording time

The soil column leaching experiment cannot be interrupted after the start, and someone needs to be waiting for sampling 24 hours a day. During this period, the experimenters can only be on duty in turn, and the workload is heavy.

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