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Process flow: The whole set of soil leaching and repairing includes: primary crushing and screening system; leaching and grading system; dehydration and screening system; reverse flotation system; water treatment system, etc. The actual process will be optimized and adjusted according to the specific conditions of the contaminated soil case to achieve the optimal process design and equipment matching.
Equipment composition: The core equipment includes: soil crusher, contaminated soil leaching and grading equipment, dewatering and grading equipment, reverse flotation equipment, water treatment equipment, etc. Desen Environment is a high-tech environmental protection enterprise with environmental engineering application technology research and development as the core and equipment processing and manufacturing as the auxiliary. It continuously improves its technical research and development strength, equipment manufacturing quality and after-sales service level to help customers achieve diversified environmental improvement needs.
To repair chemically contaminated soil, leaching and sorting technology can be used
There are many types of chemical pollutants, and different chemical plants emit different pollutants, such as ammonia, cyanide, sulfur, cadmium, and lead. Different chemical properties cause different levels of damage to the soil. Pollutants erode the soil for a long time through osmosis, especially agricultural land. Once contaminated, crops will also be damaged. Contaminated crops pose a huge threat to people’s health. Yes, to repair chemically contaminated soil, leaching and sorting technology can be used. The leaching and sorting system mainly uses chemical/biological solvents that can promote the dissolution or migration of pollutants in the soil, through a series of physical and chemical comprehensive treatment processes to clean and remediate the contaminated soil, and remove the heavy metals attached to the surface of the soil particles. Transfer of low-concentration pollutants from the solid phase to the liquid phase to facilitate subsequent centralized treatment. Technical principle: The leaching and remediation of contaminated soil mainly uses chemical/biological solvents that can promote the dissolution or migration of pollutants in the soil. Through a series of comprehensive physical and chemical treatment processes, the contaminated soil is cleaned and reconditioned to attach to the soil particles. The heavy metals on the surface are transferred from the solid phase low-concentration pollutants to the liquid phase to facilitate subsequent concentrated treatment. The sand and gravel aggregates in the soil can be recycled after leaching and grading. If the leaching mud is dehydrated, the mud solids can be safely backfilled or enter the thermal desorption repair system for further treatment. After dehydration, the waste liquid enters the water treatment system. Centralized processing. The whole set of leaching and repairing system can realize the reduction and comprehensive treatment of contaminated soil to the greatest extent. The leaching solution mainly includes: clean water, which is mainly used to remove heavy metal ions dissolved in water; inorganic solvents, such as acids, alkalis, and salts, destroy the combination of soil surface functional groups and pollutants through acidolysis, complexation or ion exchange. ; Artificial chelating agents and natural chelating agents such as citric acid and malic acid are mainly used for the removal of heavy metals.