Fertility-increasing type soil remediation system and remediation method thereof

Abstract

The invention discloses a fertility-increasing type soil remediation system. The system comprises a soil thermal desorption unit, an excrement fermentation unit, a stirring and dosing unit and a soil-excrement mixing unit; a soil source discharging end of the soil thermal desorption unit is connected with a soil source feeding end of the soil-excrement mixing unit through a first conveying device;a discharging end of the excrement fermentation unit is connected with a feeding end of the stirring and dosing unit, the discharging end of the stirring and dosing unit is connected with an excrement feeding end of the soil-excrement mixing unit through a second conveying device, and the discharging end of the soil-excrement mixing unit is connected with a third conveying device. The system hasthe advantages that the structure is simple, the soil after the heat desorption and the fermented excrement are mixed, and a disadvantage of the nutrient loss of partial soil after thermal desorptionis eliminated.

Description

technical field [0001] The invention belongs to the field of soil purification, and in particular relates to a fertilizer-enhancing soil restoration system and a restoration method thereof. Background technique [0002] The overall situation of China's soil environment is not optimistic. The national soil pollution rate is as high as 16.1%. While the soil environment problems in industrial and mining wasteland are prominent, the soil environment quality in cultivated land is even more worrying. Thermal desorption can effectively remove volatile pollutants in the soil , the heating of existing soil remediation devices often has the characteristics of uneven heating, which leads to the situation that local soil cannot be completely thermally desorbed, and at the same time, the organic matter volatilized from the soil will also escape into the air, causing the second pollution of the air. At the same time, existing heating equipment often uses solid fuel such as coal, and coal ...

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Problems solved by technology

[0002] The overall situation of China's soil environment is not optimistic. The national soil pollution rate is as high as 16.1%. While the soil environment problems in industrial and mining wasteland are prominent, the soil environment quality in cultivated land is even more worrying. Thermal desorption can effectively remove volatile pollutants in the soil , the heating of existing soil remediation devices often has the characteristics of uneven heating, which leads to the situation that local soil cannot be completely thermally desorbed, and at the same time, the organic matter volatilized from the soil will also escape into the air, causing the second pollution of the air. At the same time, existing heating equipment often uses solid fuel such as coal, and coal combustion will produce pollutants such as smoke and dust, which will be discharged into the atmosphere and cause air pollution;

[0003] At the same time, the nutrients in the soil are also destroyed after the traditional ectopic desorption, so desertification is prone to occur, which is not conducive to farming

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