Soil restoring method and system thereof

Abstract

The invention belongs to the field of treatment and regeneration of polluted soil, in particular to a soil restoring method by damp and hot pollution removal, and equipment thereof. A system for treating organic pollution soil comprises soil washing equipment, slurry extraction equipment, slurry settling equipment and sludge heating equipment and tail gas treatment equipment. The treatment method comprises the following steps of (1) washing the organic pollution soil with the soil washing equipment to prepare slurry, (2) conveying the slurry into the slurry settling equipment with the slurry extraction equipment, allowing the slurry to settle to form sludge, recycling water on a sludge layer for washing the organic pollution soil again, and (3) transferring the sludge obtained in Step (2) to the sludge heating equipment, allowing moisture and organic pollutants in the sludge to be evaporated into gas to be separated from the sludge, and backfilling after reducing the sludge. According to the system and the method, the treatment cost can be lowered, the treatment effect is improved, the treatment capacity is increased, the application scope is wide, and the secondary pollution rate is reduced to the maximum extent.

Description

technical field [0001] The invention belongs to the field of treatment and regeneration of polluted soil, and in particular relates to a method and equipment for moist heat decontamination and restoration of soil. Background technique [0002] Organic objects will have a smell, when people feel it, they will think whether the environment they are in is healthy or not. Chemicals, pesticides, and medicines are all indispensable to people's survival. When used properly, they can benefit themselves. Once they are used in excess or in the wrong place, they will become poisonous. Chemicals, pesticides, and pharmaceutical products are all indispensable items in industry, agricultural chemical production and people's lives. However, the running, leaking, dripping, leaking and remaining slag, water, and air in the production process become poisonous, pollute the environment, and endanger life when they enter the natural water, soil, and air. [0003] Since the founding of the Peopl...

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Problems solved by technology

[0008] The shortcoming of above-mentioned heat treatment method is: 1) under the condition of high temperature / high pressure, the organic matter in the soil particles needs to be distilled / desorbed, because the soil is not a good conductor of heat, the heat transfer is slow, so the utilization rate of heat is not high; 2) Treatment processes such as heat treatment / fire will destroy the organic nutrients in the soil

[0014] The main disadvantages of the above soil leaching method are: the need to use centrifugal equipment and ultrasonic equipment, it is difficult to deal with large-scale organic contaminated soil, it is limited to the use in the laboratory, and the scope of application is not wide

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