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Soil vapor extraction volatile organic pollutant tail gas clarification system

A volatile organic and exhaust gas purification technology, applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., can solve the problems of reduced removal efficiency and difficulty, and achieve the goal of overcoming poor effects and increasing the probability of photocatalytic degradation Effect

Inactive Publication Date: 2014-09-24
TIANJIN ECOLOGY CITY ENVIRONMENTAL PROTECTION
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Problems solved by technology

However, the biological method requires a certain humidity environment for the survival of microorganisms, so the degradation efficiency of organic matter that is easily soluble in water is higher, while the removal efficiency of organic matter that is insoluble in water is relatively low, and the difficulty is relatively large.

Method used

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  • Soil vapor extraction volatile organic pollutant tail gas clarification system
  • Soil vapor extraction volatile organic pollutant tail gas clarification system
  • Soil vapor extraction volatile organic pollutant tail gas clarification system

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Embodiment Construction

[0023] In order to have a deeper understanding of the present invention, a specific embodiment is listed below, and the present invention is further described in detail in conjunction with the accompanying drawings.

[0024] see figure 1 , a soil gas-phase extraction volatile organic pollutant tail gas purification system and device, its composition includes: its composition includes a gas-liquid separator 1, a vacuum pump 2, a solid-mounted photocatalytic pretreatment reactor 3 and a 2-stage bio-carbon purification Tower 4.

[0025] figure 2 It is a schematic diagram of the structure of the photocatalyst catalytic pretreatment reactor in an example of the present invention. The photocatalyst catalytic reactor is a closed shell, and an ultraviolet light source and a propeller type agitator 3-5 are installed in the shell. The ultraviolet light source used in the ultraviolet light source It is the ultraviolet light in the band between 185nm-172nm, and the ultraviolet light so...

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Abstract

The invention provides a soil vapor extraction volatile organic pollutant tail gas clarification system which includes a vacuum pump, an immobilized photocatalytic pre-processing reactor and a biochar clarification device. The vacuum pump is connected to the immobilized photocatalytic pre-processing reactor and the immobilized photocatalytic pre-processing reactor is connected to the biochar clarification device. The immobilized photocatalytic pre-processing reactor is a sealed container with a substrate layer being fully covered by a photocatalytic material. An ultraviolet lamp tube is arranged in the immobilized photocatalytic pre-processing reactor. By means of combination of gas-liquid separation, photocatalytic pre-processing and biochar adsorption and clarification, volatile organic pollutant can be clarified and eliminated efficiently in a multistep manner and defect that a conventional single biological adsorbing material is poor in effect is overcome. In addition, by means of the photocatalyst immobilized on fan blades in a propeller agitator and on an inner wall of a shell body of the photocatalytic reactor, gas is stirred effectively, tail gas fully contacts and collides the photocatalysis coating so that photocatalytic degradation probability is increased.

Description

technical field [0001] The invention relates to the field of soil gas-phase extraction of volatile organic pollutants, in particular to a system for purifying tail gas of soil gas-phase extraction of volatile organic pollutants. Background technique [0002] The problem of soil pollution has been paid more and more attention by people, and the remediation of polluted sites has become a worldwide environmental problem. Soil gas phase extraction technology is an important pollution remediation technology, which has been widely used in the remediation of polluted sites. Soil Vapor Extraction (SVE) is an in-situ soil remediation technology that uses physical methods to remove volatile organic components in soil. It uses vacuum equipment to force fresh air through the polluted soil pores, so that the air flow entrains volatile organic components. The compound goes to the extraction system, where it is collected and processed after being extracted to the ground. While the soil g...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/74B01D53/44
Inventor 张景辉杨伟李野宋震宇袁姗姗王文茜西伟力孙旭东蒋玉广王旭东
Owner TIANJIN ECOLOGY CITY ENVIRONMENTAL PROTECTION
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