In-situ soil remediation system and in-situ soil remediation method based on thermal desorption synergistic electrochemical enhancement

A soil remediation, electrochemical technology, applied in the field of soil remediation, can solve the problem of not having the function of aeration and degradation of macromolecular organic matter

Pending Publication Date: 2020-10-27
GUANGDONG J TECH ENVIRONMENT SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent is an ectopic restoration device, which also needs to be equipped with auxiliary systems such as soil excavation, transportation, loading and unloading. It is not suitable for use in situations where there are structures on polluted soil that are not suitable for excavation, and this patent does not

Method used

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  • In-situ soil remediation system and in-situ soil remediation method based on thermal desorption synergistic electrochemical enhancement
  • In-situ soil remediation system and in-situ soil remediation method based on thermal desorption synergistic electrochemical enhancement
  • In-situ soil remediation system and in-situ soil remediation method based on thermal desorption synergistic electrochemical enhancement

Examples

Experimental program
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Effect test

Embodiment 1

[0084] This embodiment provides a method for in-situ remediation of polluted soil 16, the highest content of ammonia nitrogen in the polluted soil 16 being treated is 13800mg / kg (at the thickness of the soil layer of 10-12m), heavy metals include total chromium, total manganese and The maximum content of total cadmium is 753mg / kg, 560mg / kg and 385mg / kg respectively, and the maximum content of volatile organic compounds including halogenated hydrocarbons and polychlorinated biphenyls is 58mg / kg and 5.3mg / kg respectively. The contaminated soil 16 areas are repaired in situ, and the soil restoration method includes the following steps:

[0085] (1) Fully infiltrate the polluted soil 16, and the electric energy generated by the conversion of the solar photovoltaic module is stored in the power storage device 2, and the power storage device 2 supplies power to the microwave generator 3, and the microwave generator 3 outputs microwaves through the microwave heating rod 13 The pollut...

Embodiment 2

[0090] This embodiment provides a method for in-situ remediation of polluted soil 16, the highest content of ammonia nitrogen in the polluted soil 16 being treated is 1380 mg / kg (10-12m soil layer thickness), heavy metals include total chromium, total manganese and The maximum content of total cadmium is 753mg / kg, 560mg / kg and 385mg / kg respectively, and the maximum content of volatile organic compounds including halogenated hydrocarbons and polychlorinated biphenyls is 58mg / kg and 5.3mg / kg respectively. The contaminated soil 16 areas are repaired in situ, and the soil restoration method includes the following steps:

[0091] (1) Fully infiltrate the polluted soil 16, and the electric energy generated by the conversion of the solar photovoltaic module is stored in the power storage device 2, and the power storage device 2 supplies power to the microwave generator 3, and the microwave generator 3 outputs microwaves through the microwave heating rod 13 The polluted soil 16 is hea...

Embodiment 3

[0096] This embodiment provides a method for in-situ remediation of polluted soil 16. The highest content of ammonia nitrogen in the polluted soil 16 is 14250mg / kg (10-12m soil layer thickness), heavy metals include total chromium, total manganese and The maximum content of total cadmium is 786mg / kg, 553mg / kg and 385mg / kg respectively, and the maximum content of volatile organic compounds including halogenated hydrocarbons and polychlorinated biphenyls is 75mg / kg and 4.8mg / kg respectively. The contaminated soil 16 areas are repaired in situ, and the soil restoration method includes the following steps:

[0097] (1) Fully infiltrate the polluted soil 16, and the electric energy generated by the conversion of the solar photovoltaic module is stored in the power storage device 2, and the power storage device 2 supplies power to the microwave generator 3, and the microwave generator 3 outputs microwaves through the microwave heating rod 13 The polluted soil 16 is heated to 88°C, a...

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Abstract

The invention provides an in-situ soil remediation system and an in-situ soil remediation method based on thermal desorption synergistic electrochemical enhancement. The system comprises a solar powersupply module, an electrochemical enhancement module, a microwave heating module, a nutrient solution spraying module and a gas phase extraction module; the solar power supply module is electricallyconnected with the electrochemical enhancement module and the microwave heating module respectively; the electrochemical enhancement module comprises an anode plate and a cathode plate which are buried in a polluted soil area; the microwave heating module comprises at least one microwave heating rod buried in the contaminated soil area and a microwave generator connected with the microwave heatingrod; the nutrient solution spraying module comprises at least one spraying pipe buried in the contaminated soil area, and the spraying pipe is externally connected with a nutrient solution storage tank; and the gas phase extraction module comprises a gas phase extraction pipe network inserted into the contaminated soil area and a vacuum pump externally connected with the gas phase extraction pipenetwork. According to the method, comprehensive and efficient remediation treatment is carried out on various pollutants in the contaminated soil, and synergistic and efficient removal of the variouspollutants is achieved.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and relates to an in-situ soil remediation system and an in-situ soil remediation method, in particular to an in-situ soil remediation system and an in-situ soil remediation method with thermal desorption and electrochemical strengthening. Background technique [0002] Soil not only provides mechanical support for the growth of plants, but also provides the necessary water, fertilizer, gas, heat and other fertility elements for the growth and development of plants. Due to the rapid population growth, the continuous acceleration of the industrialization process, the continuous stacking and dumping of solid waste on the soil surface, the application of chemical fertilizers and pesticides, the continuous infiltration of harmful wastewater into the soil, the harmful gases and dust in the atmosphere are also constantly falling into the soil with rain, etc. The reason is that soil pollution is...

Claims

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Application Information

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IPC IPC(8): B09C1/06B09C1/08
CPCB09C1/06B09C1/085B09C2101/00
Inventor 胡静龄杨颖欣钟璐胡小吐刘勇薛学良
Owner GUANGDONG J TECH ENVIRONMENT SCI CO LTD
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