Automatic soil leaching device and method using rainfall

Abstract

The invention relates to an automatic soil leaching device using rainfall, which comprises a water tank, a liquid preparation tank, a quantitative cylinder and a flow channel, and is characterized in that the water tank is used for collecting a preset amount of water; the liquid preparation box is used for accommodating a prepared liquid for soil treatment; the quantitative cylinder is connected with the liquid preparation box; the flow channel is connected with the water tank and the polluted soil, and a liquid inlet connected with the quantitative cylinder is formed in the flow channel; a control valve is arranged on the flow channel, the control valve is used for opening the flow channel when the water quantity in the water tank reaches a threshold value, so that water in the water tank is mixed with the prepared liquid in the quantitative barrel to leach the polluted soil, a control plate is arranged between the quantitative barrel and the liquid preparation box, and the control plate is used for controlling the liquid preparation box to drip the polluted soil when the flow channel is opened. And when the flow channel is closed, the channel between the liquid preparation box and the quantitative cylinder is closed, and when the flow channel is closed, the channel between the liquid preparation box and the quantitative cylinder is opened, so that the proportions of the leaching water amount and the liquid preparation amount each time are the same or approximate. The device can be used for automatically leaching the soil of the polluted site according to a certain water and soil treatment liquid preparation ratio.

Description

technical field [0001] The invention relates to an automatic soil leaching device utilizing precipitation, and also relates to an automatic soil leaching method comprising the above-mentioned automatic soil leaching device utilizing precipitation. Background technique [0002] Soil leaching remediation method or soil leaching treatment method, by using eluent such as water to wash the pollutants adsorbed on the surface of soil particles, the soil and pollutants are desorbed into the liquid, and the pollutant content in the soil is reduced to purpose below the standard. [0003] The soil leaching in the prior art generally adopts ex-situ treatment, the polluted soil is excavated and transferred to the treatment site, and after the larger particles are screened out, the fine-grained soil enters the leaching equipment, and water and mixed with water are added. A certain proportion of chelating agents or surfactants in Shuicheng are mixed thoroughly for leaching. After leaching...

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Problems solved by technology

The soil leaching method in the prior art needs to be processed through a series of complicated leaching equipment and processes, which is expensive and difficult to deal with large-scale contaminated soil

In other existing technologies, the in-situ leaching method is also included. The method includes concentrating the above-mentioned equipment on the engineering vehicle, and backfilling while excavating while rinsing, which essentially reduces the process of soil transportation. Another way is to Contaminated soil is directly injected with eluent, and the treated eluent is extracted by setting up an extraction well. Since this method of in-situ leaching mainly relies on the natural infiltration of eluent, its efficiency is lower than that of the above-mentioned leaching method. , usually needs to be repeated many times, the processing time is long, and a large amount of manpower and water resources are required, and the natural penetration time of the eluent is difficult to calculate accurately. If the eluent is extracted too early, the leaching effect will be affected, and the extraction time will be prolonged. The lotion is difficult to be completely extracted, and the eluent will cause secondary pollution

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