Soil restoration system and soil restoration method thereof

Abstract

The invention discloses a soil restoration system and a soil restoration method thereof. The soil restoration system comprises a thermal desorption furnace, a combustion device and a waste heat boiler. The thermal desorption furnace comprises a furnace body, a material distributing plate and a first radiant pipe combustor. A thermal desorption region is arranged in the furnace body. The first radiant pipe combustor is arranged on the side wall of the furnace wall so as to provide thermal desorption heat for soil in the thermal desorption region. The position, corresponding to the thermal desorption region, of the furnace body is provided with a volatile gas outlet. The combustion device is provided with a combustion chamber used for combusting gas. The combustion chamber is provided with a fuel gas inlet, a first flue gas inlet and a first flue gas outlet. The fist flue gas inlet communicates with the volatile gas outlet. The waste heat boiler is provided with a second flue gas inlet and a second flue gas outlet. The second flue gas outlet communicates with the first flue gas outlet. According to the soil restoration system, heat in high-temperature oil gas generated in the thermal desorption furnace can be repeatedly used, and loss of lots of heat and energy waste are avoided.

Description

technical field [0001] The invention relates to the field of soil restoration, in particular to a soil restoration system and a soil restoration method thereof. Background technique [0002] With economic upgrading, industrial transfer and transformation, a large number of steel, chemical and other industrial lands, solid waste dumps, and military bases have been relocated from urban centers to other areas or suburbs, leaving behind a large number of polluted sites. The pollutants in the soil are mainly organic substances such as total petroleum hydrocarbons and polycyclic aromatic hydrocarbons, and some soils also contain heavy metal pollutants such as mercury and arsenic. The contaminated soil is difficult to restore, causing harm to agricultural products and human health. Among related soil remediation technologies, thermal desorption technology has certain advantages, but most thermal desorption technologies use direct heating, which not only easily forms secondary pollu...

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Problems solved by technology

The pollutants in the soil are mainly organic substances such as total petroleum hydrocarbons and polycyclic aromatic hydrocarbons, and some soils also contain heavy metal pollutants such as mercury and arsenic. The contaminated soil is difficult to recover, causing harm to agricultural products and human health

Among related soil remediation technologies, thermal desorption technology has certain advantages, but most thermal desorption technologies use direct heating, which not only easily forms secondary pollutants such as dioxins during the heating process, but also has a large amount of flue gas. , much ash

At the same time, due to the high heat of the exhaust gas, a large amount of heat loss and energy waste are caused, which also increases the cost of thermal desorption repair technology

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