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Method for restoring soil through steam digestion method

A technology of repairing soil and leaching method, which is applied in the field of soil remediation, can solve the problems of large external influence of microorganisms, contradictory results, and failure to achieve expected results, etc., and achieve strong operability, obvious effects, and wide-ranging effects

Inactive Publication Date: 2018-04-17
南京化学工业园环保产业协同创新有限公司
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Problems solved by technology

[0003] With people's attention to environmental issues and the advancement of modern agriculture, pesticide microbial remediation technology will play a greater role in the control of pesticide environmental pollution, but there are also the following problems in the remediation process: Microbial remediation research has achieved a lot in the laboratory However, when the results are applied to soil pollution sites, they often fail to achieve the expected results, and even contradict the laboratory results; during the test, microorganisms are greatly affected by the outside world; in many cases, the pollutants cannot be completely degraded, and may Produces intermediates that are sometimes more toxic than the parent compound

Method used

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Embodiment 1

[0015] A method for repairing soil by steam extraction method, the method may further comprise the steps:

[0016] (1) Arrange horizontally and vertically staggered steam pipes in the soil to be repaired;

[0017] (2) Mix water and alcohol in a ratio of 3:1 to heat the production steam and pass it into the steam pipeline arranged in step (1);

[0018] (3) Steam insulation and ventilation for 30 minutes to 60 minutes.

[0019] In the method for repairing soil by the steam extraction method, the distribution density of the steam pipes is such that the distance between horizontally and vertically adjacent pipes is not greater than 1 meter. In this embodiment, the distance between horizontally and vertically adjacent pipes is preferably 80 cm, and steam volatilization holes are densely arranged on the pipes. The steam pressure is above 200MPa.

[0020] In the method for repairing soil by the steam extraction method, the temperature of the steam is higher than 80°C. In this emb...

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Abstract

The invention provides a method for restoring soil by steam extraction. The method for repairing soil by steam extraction method of the present invention includes the following steps: (1) arranging steam pipes that are staggered horizontally and vertically in the soil to be repaired; (2) mixing and heating water and alcohol in a ratio of 3:1 to produce steam and pass it into the Step (1) In the arranged steam pipeline; (3) The steam is kept warm and ventilated for 30-60 minutes. The invention has good soil remediation effect and can effectively avoid secondary pollution.

Description

Technical field: [0001] The invention relates to a method for repairing soil by a steam leaching method, and belongs to the technical field of soil repair. Background technique: [0002] Nearly one-fifth of China's existing arable land is polluted to varying degrees. Polluted soil will lead to crop yield reduction, and may even cause pollutants in agricultural products to exceed the standard, thereby endangering human health. In addition, with the acceleration of economic development and urbanization, the site pollution caused by industrial and mining enterprises is also very serious. Due to the changes and adjustments in the industrial structure and urban layout, some polluting enterprises such as chemical industry and metallurgy have relocated one after another, and some enterprises have closed down, resulting in continuous generation of polluted sites. Soil is an important material basis for human social production activities and an indispensable natural resource that is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/06B09C1/08
CPCB09C1/06B09C1/08
Inventor 张永军朱伟晓
Owner 南京化学工业园环保产业协同创新有限公司
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