Laboratory soil pretreatment closed box capable of realizing gas circulation and purification functions

Abstract

The invention discloses a laboratory soil pretreatment closed box capable of realizing gas circulation and purification functions. The device comprises a closed box body, a crushing and grinding unit,a screening unit, a soil collecting unit, a gas circulating unit and a controller for operating and controlling all the units, the crushing and grinding unit is used for pre-crushing soil containingagglomerates through two roll shafts which rotate in opposite directions, then, the pre-crushed soil is fully ground in batches in a grinding pipe by utilizing a grinder, fineness of soil particles can be improved, soil particles are screened by the screening unit and then collected by the soil collecting unit, in addition, internal airflow circulation is conducted through the gas circulating unit, polyurethane foam is added to adsorb dust, an activated carbon filter column is added to adsorb organic pollution gas, and environment is prevented from being polluted. In conclusion, the closed boxhas the advantages of being good in soil pretreatment effect, environmentally friendly and the like.

Description

technical field [0001] The invention belongs to the technical field of soil detection, and in particular relates to a laboratory soil pretreatment closed box capable of realizing gas circulation and purification functions. Background technique [0002] Soil is not only a constituent element of the natural environment, but also the most important natural resource for agricultural production. With the rapid development of cities and industrialization, the spillage of organic pollutants, leakage of storage containers, leakage of landfills, and even residues of organic pesticides lead to soil pollution. [0003] Before the detection of organic pollutants in the soil and the treatment of soil pollution, the soil needs to be finely ground. At present, the commonly used method of grinding soil is artificial grinding, that is, the experimenter manually sorts out the impurities from the collected soil samples, or uses a sieve to manually select out the impurities, and then grinds th...

AI Technical Summary

Problems solved by technology

At present, the commonly used method of grinding soil is artificial grinding, that is, the experimenter manually sorts out the impurities from the collected soil samples, or uses a sieve to manually select out the impurities, and then grinds the soil samples with a grinding rod. Due to the variety of soil samples , the method of manual grinding is time-consuming and labor-intensive, and often takes a day or even a few days for the experimenter, which seriously affects the follow-up detection efficiency

[0004] Therefore, at present, most of them use machinery instead of manual grinding, but the grinding effect is still relatively unsatisfactory, and because most of the equipment used is in a semi-open state, it is easy to cause fine powder to carry organic pollutants flying during grinding, which not only easily affects the test results, It will also pollute the experimental environment and cause damage to the health of the experimenters.

Even if the flying powder phenomenon during the grinding process is suppressed by means of adding a cover, it will still cause pollution when it is opened

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