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Purification method for organic waste gas

A technology of organic waste gas and purifier, applied in chemical instruments and methods, separation methods, and separation of dispersed particles, etc., can solve the problems of reduced purification efficiency, complex treatment process, low concentration, etc., and achieve reduced load impact, simple treatment process, The effect of high purification efficiency

Inactive Publication Date: 2010-07-28
NINGBO UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The catalytic combustion method has a simple process and high purification efficiency. Its disadvantages are high energy consumption and potential safety hazards, especially not suitable for the treatment of large air volume, low concentration, and unstable organic waste gas; The capacity of the adsorbent is limited and the equipment is huge, and post-treatment processes such as adsorbent regeneration and solvent recovery are complicated; the application range of condensation method and absorption method is more limited; plasma technology has begun to be applied to the treatment of organic waste gas, and has energy consumption. Low cost, short treatment process, simple operation and other significant advantages, but its disadvantage is that when dealing with large-volume organic waste gas, the gas stays in the plasma action area for a short time, resulting in reduced purification efficiency
[0004] A Chinese patent on an organic waste gas purification method (application number 200610046641.6) discloses an organic waste gas purification method including waste gas pretreatment, organic waste gas concentration adjustment and purification treatment, which improves the organic waste gas treatment efficiency, but the organic waste gas purification step adopts catalytic combustion Purification treatment requires a large amount of auxiliary equipment, high energy consumption, and is not suitable for the treatment of large air volume, low concentration, unstable organic waste gas

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 As shown, the concentration is 10-1000mg / m 3 The organic waste gas passes through the filter to remove particulate matter, and the organic waste gas after the removal of particulate matter passes through the granular activated carbon adsorption bed to absorb part of the organic waste gas, and then passes through a high-voltage power supply with a voltage of 10kV and a frequency of 1kHz to perform plasma purification on the organic waste gas. The bulk purification treatment is carried out in a flat-plate plasma purification processor, using the O produced by dielectric barrier discharge 3 、H 2 o 2 ,OH·,H·,O· - High-energy electrons and ultraviolet light interact with pollutants in organic waste gas, and organic pollutants are oxidized and decomposed to obtain carbon dioxide and water, which are directly discharged into the atmosphere.

[0020] When the emission of organic waste gas stops or the concentration of organic waste gas is very low, the acti...

Embodiment 2

[0022] Such as figure 2 As shown, the concentration is 10-1000mg / m 3 The organic waste gas passes through the filter to remove particulate matter, passes the organic waste gas after removing particulate matter through the honeycomb activated carbon adsorption bed, absorbs part of the organic waste gas, and then performs plasma purification treatment on the organic waste gas through a high-voltage power supply with a voltage of 100kV and a frequency of 10kHz. The body purification treatment is carried out in a flat-plate plasma purification processor, using the O produced by pulsed corona discharge 3 、H 2 o 2 ,OH·,H·,O· - High-energy electrons and ultraviolet light interact with pollutants in organic waste gas, and organic pollutants are oxidized and decomposed to obtain carbon dioxide and water, which are directly discharged into the atmosphere.

[0023] When the emission of organic waste gas stops or the concentration of organic waste gas is very low, the temperature of ...

Embodiment 3

[0025] Such as image 3 As shown, the concentration is 10-1000mg / m 3 The organic waste gas passes through the filter to remove particulate matter, passes the organic waste gas after removing particulate matter through the activated carbon fiber adsorption bed, absorbs part of the organic waste gas, and then performs plasma purification treatment on the organic waste gas through a high-voltage power supply with a voltage of 200kV and a frequency of 20kHz. The purification treatment is carried out in a cylindrical plasma purification processor, using O 3 、H 2 o 2 ,OH·,H·,O· - High-energy electrons and ultraviolet light interact with pollutants in organic waste gas, and organic pollutants are oxidized and decomposed to obtain carbon dioxide and water, which are directly discharged into the atmosphere.

[0026] When the emission of organic waste gas stops or the concentration of organic waste gas is very low, turn on the suction pump to form a negative pressure inside the acti...

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Abstract

The invention discloses a purification method for organic waste gas, which comprises the pre-treatment for the organic waste gas. The purification method is characterized in that the concentration of the pretreated organic waste gas is adjusted by an activated carbon adsorption bed firstly, and then the organic waste gas is purified by a plasma purifier. The purification method has the advantages that the stable operation of a plasma purification unit can be realized, large amount of auxiliary equipment are not needed, the energy consumption is low, the treatment process is simple, and the purification efficiency is high, thereby being suitable for treating the unstable organic waste gas with large air quantity and low concentration.

Description

technical field [0001] The invention relates to a method for purifying organic waste gas, in particular to a method for purifying organic waste gas which is applied to the treatment of large air volume, low concentration and unstable organic waste gas. Background technique [0002] There are many kinds of industrial organic waste gas, the composition is complex, the concentration fluctuates greatly and the change is irregular, and its treatment is relatively difficult. At present, the treatment methods for organic waste gas at home and abroad include catalytic combustion method, activated carbon adsorption method, plasma oxidation method, condensation method and absorption method. [0003] The catalytic combustion method has a simple process and high purification efficiency. Its disadvantages are high energy consumption and potential safety hazards, especially not suitable for the treatment of large air volume, low concentration, and unstable organic waste gas; The capacity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04B01D53/72B01D53/74
Inventor 高华生
Owner NINGBO UNIV
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