Heavy metal polluted soil leaching and remediating device
A heavy metal-contaminated soil and leaching technology, which is applied in the restoration of polluted soil and other directions, can solve the problems of hindering the process of land pollution control and ecological restoration, not considering the repeated leaching of the eluent, and increasing the cost of post-treatment. Improve repair efficiency, reduce heat loss, compact structure
Active Publication Date: 2011-11-16
JIANGSU ZHONGYI ECOLOGICAL SOIL INST
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Problems solved by technology
Most of the existing devices do not consider the repeated rinsing of the eluent, resulting in increased post-processing costs and waste of resources
[0004] Therefore, the existing soil chemical leaching repair device has low repair efficiency, long cycle, and high cost. my country still lacks equipment in the field of soil repair, which seriously hinders the process of land pollution control and ecological restoration.
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[0011] Below in conjunction with accompanying drawing, a kind of heavy metal polluted soil leaching restoration device of the present invention is described in further detail:
[0012] see Attachment
[0013] A leaching repair device for heavy metal contaminated soil, the repair device consists of a eluent storage bottle 1, a leaching column 2, a constant temperature water bath 3, a peristaltic pump 4, a sedimentation tank 5, a filter tank 6, a water injection pump 7, a tee, a valve and The leaching column 2 is composed of a sealed upper cover 10, a sealed lower cover 11, a cylinder body 19, and an insulation layer 20. The cylinder wall of the cylinder body 19 is in the shape of a sandwich to provide space for hot water to flow. The inner wall of the cylinder body 19 The metal material with good thermal conductivity and corrosion resistance is adopted. The outer wall of the cylinder 19 is covered with an insulation layer 20. The insulation layer 20 can be made of polyurethane ...
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Abstract
The invention discloses a heavy metal polluted soil leaching and remediating device and to polluted soil rededicating equipment. The heavy metal polluted soil leaching and rededicating device is of a double-circulation structure, leacheate is recycled, leaching is carried out for multiple times, the efficiency for rededicating polluted soil can be improved, the defects that the cost of aftertreatment on polluted leacheate is high and the leacheate is wasted can be overcome, water bath cyclic heating is adopted, the polluted soil is uniformly heated at constant temperature, a leaching pillar insulating layer can be used for reducing heat loss in a leaching environment, and the influence of the heat loss on the heating effect is eliminated. The water bath cyclic heating and bottom liquid feeding are adopted to leach the polluted soil, thus the efficiency for removing heavy metal in the polluted soil can be obviously improved. The leacheate is recycled, thus the cost can be saved. The device changes the traditional leaching remediating way, integrates polluted soil leaching, leacheate recycling and heavy metal collecting into a whole, has the advantages of compact structure, less occupied area, convenience in operation and low cost, and can be widely applied to leaching and remediating of multi-metal polluted soil.
Description
technical field [0001] The invention discloses a heavy metal polluted soil leaching repair device, which belongs to the category of contaminated soil repair equipment. Background technique [0002] At present, the area of cultivated land polluted by heavy metals such as cadmium, arsenic, chromium, and lead in my country is nearly 20 million hectares. With the acceleration of urbanization and industrialization, more and more land is polluted by heavy metals. Heavy metal legacy sites urgently need treatment. Soil heavy metal pollution is concealed, lagging and long-term. Heavy metals enter plants through the root system, inhibit plant growth, and indirectly threaten human life and health. At the same time, heavy metal pollutants will also migrate and be exposed to groundwater. and the atmosphere, destroying the ecological environment. Contaminated land must be repaired before it can be redeveloped and utilized. As the "poisonous land" used without repair is constantly expos...
Claims
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IPC IPC(8): B09C1/02B09C1/08
Inventor 薛强李江山胡竹云赵颖
Owner JIANGSU ZHONGYI ECOLOGICAL SOIL INST