Cyclic extraction type groundwater quality detection equipment

Abstract

The invention provides a cyclic extraction type groundwater quality detection equipment system. The system comprises an extraction pipe, a self-priming pump, a water inlet pipe, a water tank, a watertank outlet pipe and a water return pipe, wherein the lower end of the extraction pipe extends into a sampling well; an inlet of the self-priming pump is connected with the upper end of the extractionpipe; the water inlet pipe is connected with an outlet of the self-priming pump; a water inlet of the water tank is communicated with the water inlet pipe, and a plurality of water quality parametersensors with different indexes are distributed in the water tank; the water tank outlet pipe is communicated with a water outlet of the water tank; the upper end of the water return pipe is connectedwith the water tank outlet pipe, and the lower end extends into the position, below the groundwater level and close to the water surface, of the sampling well. A water sample is extracted from the bottom of the sampling well, water quality is detected by detection equipment on the ground, meanwhile, the water sample is not reserved, the extracted groundwater is reinjected into the upper water level layer of the same sampling well in real time, groundwater sampling is facilitated for a technician while groundwater quality is monitored on line, disturbance to quality of sampling water from the well bottom is reduced to the greatest extent, and water level in the well is guaranteed.

Description

Technical field [0001] The invention relates to the technical field of online monitoring, in particular to a circulating extraction type groundwater quality detection equipment. Background technique [0002] In the process of groundwater pollution control, the monitoring of groundwater quality changes is of great significance, and the results can guide the adjustment of groundwater pollution control methods and the revision of process parameters. However, due to the limitations of the actual conditions of the site and to avoid excessive interference with the groundwater, sampling wells with a diameter of less than 100mm are usually used to sample the groundwater. Due to the small diameter of the sampling well, it is difficult to place equipment in the well for automatic monitoring of water quality, and it is only possible to manually extract water from the sampling well for sampling. This sampling method is more labor intensive, and the data is not continuous, and it is impossib...

AI Technical Summary

Problems solved by technology

Due to the small diameter of the sampling well, it is difficult to place equipment in the well for automatic monitoring of water quality, and the water can only be manually extracted from the sampling well for sampling

This sampling method is relatively labor-intensive, and the data is not continuous, so it is impossible to accurately obtain the law of the quality change of polluted groundwater.

And due to the different soil permeability, some soil sites with low permeability, the water level in the well cannot rise for a long time after sampling, which affects the secondary sampling

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