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Treatment device and method for degrading gasoline in soil

The technology of a treatment device and a treatment method, which is applied in the field of soil treatment, can solve the problems of difficult to deal with oily substances, easy to damage the ecological environment, general treatment effect, etc., and achieve the effects of saving manpower, improving treatment efficiency, and good removal effect.

Inactive Publication Date: 2017-06-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are mainly two forms of soil remediation: in-situ remediation and ex-situ remediation. However, there are certain problems in the two treatment methods, such as general treatment effect, difficult to deal with oily substances with strong adhesion, high cost, and difficult to treat deep-seated soil. Pollution will produce secondary pollution, easily destroy the original ecological environment, and take a long time to process, etc.

Method used

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  • Treatment device and method for degrading gasoline in soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The soil used in the experiment comes from the actual soil on the campus of Donghua University. Firstly, the soil configured for the experiment is air-dried for a period of time to remove the soil that can volatilize naturally. Take 5g of air-dried soil with a gasoline concentration of 1597ppm and evenly spread it on the plasma reaction surface. On the polar plate 10 of the device, adjust the distance between the needle plate electrode 7 and the polar plate 10 to be 20mm, turn on the air pump 13, let in air, and adjust the air flow rate to 1L / min, turn on the pulse high-voltage power supply 1 at this time, and adjust the frequency 50kHz, voltage 30kV, treatment 60min. After the treatment, the concentration of gasoline in the soil is 271.5ppm, and the degradation rate of gasoline is 83%.

Embodiment 2

[0031] The soil used in the experiment comes from the actual soil on the campus of Donghua University. First, the soil prepared for the experiment is air-dried for a period of time to remove the soil that can volatilize naturally. Take 5g of air-dried soil with a gasoline concentration of 3165ppm and put it into the plasma reactor. , adjust the distance between the needle plate electrode 7 and the pole plate 10 to 20mm, turn on the air pump 13, let in air, adjust the air flow rate to 1L / min, turn on the pulse high-voltage power supply 1 at this time, adjust the frequency to 50kHz, and the voltage to 30kV , processing 60min. Detect after treatment, the concentration of gasoline in the soil after treatment is 760ppm, and the degradation rate of gasoline is 76%.

Embodiment 3

[0033] The soil used in the experiment comes from the actual soil on the campus of Donghua University. First, the soil configured for the experiment is air-dried for a period of time to remove the soil that can volatilize naturally. Take 5g of air-dried soil with a gasoline concentration of 3385ppm and spread it evenly on the sub-plasma reactor In the process, adjust the distance between the needle plate electrode 7 and the pole plate 10 to be 20mm, turn on the air pump 13, and let in air, and adjust the air flow rate to 1L / min, then turn on the pulse high-voltage power supply 1, adjust the frequency to 50kHz, and the voltage to 30kV, treatment 60min. Detect after treatment, the concentration of gasoline in the soil after treatment is 948ppm, and the degradation rate of gasoline is 72%.

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Abstract

The invention discloses a treatment device and method for degrading gasoline in soil. The treatment device comprises a pulse high-voltage power source and a plasma reactor. An electrode plate is arranged in a reactor shell of the plasma reactor and provided with a needle plate electrode. The two ends of a positive electrode port end of the reactor are connected with the needle plate electrode and a positive pulse port end of the pulse high-voltage power source correspondingly. A negative electrode plate of the reactor is grounded. A gas inlet and a gas outlet are formed in the reactor shell, and the gas inlet communicates with an air pump. The treatment method comprises the steps that the soil contaminated by the gasoline is evenly flatly laid in the reactor shell of the plasma reactor, gas is introduced into the reactor shell, and then the pulse high-voltage power source is turned on for discharging. According to the treatment device and method, air of a certain flow speed is used as an air source, high-voltage pulse plasma corona discharging is adopted, and gasoline contaminants in the soil are removed.

Description

technical field [0001] The invention provides a treatment device and method for degrading gasoline in soil, belonging to the technical field of soil treatment. Background technique [0002] In recent years, nearly 800,000 tons of petroleum are discharged into the environment every year worldwide. About one-sixth of the underground oil storage tanks in the United States leak; various chemical plants and gas stations in the United Kingdom also have serious oil pollution; the Netherlands also has about 100,000 oil-polluted sites so far. In our country, due to the rapid increase in the number of cars, gas stations and underground oil storage tanks have also increased dramatically. Leaks have also occurred at these gas stations and storage tanks due to limited technology. This not only pollutes the environment, but also causes physical harm to nearby personnel. Long-term exposure to low-concentration gasoline and oil can cause symptoms of neurasthenia syndrome and autonomic dy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
CPCB09C1/085
Inventor 刘亚男战佳勋姚璟文孙基惠杜纯李响张艾李君张晗沈雪殷雪妍王慈浩叶婷婷郝思宇高小婷何文龙
Owner DONGHUA UNIV