Method and device for treating nondegradable organic waste gas by combining low-temperature plasma with organisms

A low-temperature plasma, organic waste gas technology, applied in the field of environmental pollution control, can solve problems such as inability to apply, incomplete degradation, and a large number of harmful by-products

Active Publication Date: 2011-05-18
山东航源环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the adsorption capacity of the adsorbent is limited, and the adsorbent needs to be regenerated
Even so, there are problems such as incomplete degradation and a large number of harmful by-products, so it cannot be applied to engineering practice.

Method used

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  • Method and device for treating nondegradable organic waste gas by combining low-temperature plasma with organisms
  • Method and device for treating nondegradable organic waste gas by combining low-temperature plasma with organisms

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Wet coke quenching waste gas temperature is 50°C, contains volatile phenol 249mg / m 3 And benzene 84mg / m 3 , the flow rate is 280m 3 / h, formic acid, acetic acid and oxalic acid were not detected. The injected energy is 66kJ / m 3 After treatment in a low-temperature plasma reactor, the concentrations of volatile phenol and benzene in the gas were reduced to 18mg / m 3 and 8.2mg / m 3 , at the same time, the measured gas contains formic acid 17mg / m 3 , Acetic acid 61mg / m 3 and oxalic acid 53mg / m 3 , indicating that after the organic waste gas is treated by a low-temperature plasma reactor, some substances in the organic waste gas are oxidized to form easily degradable organic products such as formic acid, acetic acid and oxalic acid. The gas discharged from the low-temperature plasma reactor directly enters the biological scrubber, and the concentrations of volatile phenol and benzene after treatment are 12mg / m3 3 and 5.4mg / m 3 , no formic acid, acetic acid and oxalic...

Embodiment 2

[0031] The temperature of spray paint exhaust gas is 21°C, and the benzene content is 84mg / m 3 , toluene 143mg / m 3 And xylene 185mg / m 3 , the flow rate is 120m 3 / h, formic acid, acetic acid and oxalic acid were not detected. The injected energy is 58kJ / m 3 After treatment in a low-temperature plasma reactor, the concentrations of benzene, toluene and xylene in the gas were reduced to 12mg / m 3 , 11mg / m 3 and 19mg / m 3 . At the same time, the measured gas contains formic acid 62mg / m 3 , Acetic acid 97mg / m 3 and oxalic acid 37mg / m 3 . The gas discharged from the low-temperature plasma reactor directly enters the biological trickling filter tower, and the concentrations of benzene, toluene and xylene are reduced to 8mg / m3 after treatment 3 , 8mg / m 3 and 15mg / m 3 , formic acid, acetic acid and oxalic acid were not detected. After low-temperature plasma combined with biological treatment, the total removal rates of benzene, toluene and xylene were 90.5%, 94.4%, and 91....

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Abstract

The invention discloses a method and device for treating nondegradable organic waste gas by combining low-temperature plasma with organisms. After being collected, organic waste gas is sequentially treated through a low-temperature plasma reactor and a biological treatment reactor and finally exhausted to the atmosphere through a chimney. In the low-temperature plasma reactor, polycyclic aromatichydrocarbon, halogenated hydrocarbon, heterocycle compounds and an organic nitrile compound which are insoluble in water and nonbiodegradable are oxidized into low-carbon organic acid, alcohol, esterand other organic compounds which are soluble in water and biodegradable by utilizing substances with strong oxidizing property, such as O3, OH., H2O2, O. and high-energy electrons generated by high voltage discharge. In the biological treatment reactor, the organic acid, the alcohol, the ester and other organic compounds are further converted into CO2, H2O and other inorganic compounds under theaction of microorganisms. Through the treatment, the total purification efficiency of nondegradable organic compounds containing benzene, methylbenzene, dimethylbenzene, phenol and the like in waste gas can be up to over 90 percent.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and relates to a method and a device for treating refractory organic waste gas by combining low-temperature plasma and biology, and more specifically, relates to using the complementary effect of low-temperature plasma and biology to make organic waste gas Convert polycyclic aromatic hydrocarbons, halogenated hydrocarbons, and organic nitrile compounds that are insoluble in water and difficult to biodegrade into CO 2 、H 2 O and other inorganic compound methods and devices. Background technique [0002] Organic waste gas is widely produced in petroleum, chemical, coking, printing and dyeing, spraying, slaughtering and other industries. The main treatment methods of organic waste gas include adsorption, catalytic oxidation and biological treatment. Among them, the adsorption method is to use a porous solid adsorbent to adsorb organic components to achieve the purpose of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/44
Inventor 朱天乐孙轶斐燕潇
Owner 山东航源环境科技有限公司
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