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Method for improving VOCs and malodorous gas treatment efficiency of low-temperature plasma by regulating and controlling humidity

A low-temperature plasma and malodorous gas technology, applied in gas treatment, separation methods, chemical instruments and methods, etc., can solve the problem that the humidity of the intake air is not the optimum humidity, the degradation efficiency of pollutants is not optimal, and it is difficult to ensure the discharge of exhaust gas Standards and other issues to achieve the effect of improving treatment efficiency, improving degradation efficiency, and reducing pollutant emissions

Inactive Publication Date: 2020-05-22
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Under different humidity, low-temperature plasma has different degradation efficiencies for different components of pollutants. However, due to the uncontrollable humidity of the intake air of industrial waste gas or the humidity of the intake air is not the optimum humidity, the degradation efficiency of low-temperature plasma for pollutants in exhaust gas is not optimal. , it is difficult to ensure that the exhaust gas discharge reaches the standard, which restricts the application of low-temperature plasma in the treatment of VOCs and malodorous gases

Method used

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  • Method for improving VOCs and malodorous gas treatment efficiency of low-temperature plasma by regulating and controlling humidity

Examples

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Embodiment 1

[0030] The organic volatile waste gas produced by the sewage treatment unit of an oil refinery was tested. Before the experiment, the content of benzene in the waste gas was 80 mg / Nm 3 , the relative humidity of the exhaust gas is 98%. After the humidity of the exhaust gas is reduced to 30% by a refrigerated dehumidifier, it enters the low-temperature plasma reaction unit generator for degradation. The content of benzene is 4mg / Nm 3 , The removal rate of benzene is up to 95%.

Embodiment 2

[0034] Take the exhaust gas from a styrene-butadiene rubber drying box of a chemical plant for testing, and the content of non-methane total hydrocarbons in the exhaust gas is 1500mg / Nm 3 , the relative humidity of the exhaust gas is 8%. After the humidity of the exhaust gas is increased to 30% by a direct evaporative humidifier, it enters the low-temperature plasma reaction unit generator for degradation. The concentration of non-methane total hydrocarbons is 90mg / Nm 3 , The total non-methane hydrocarbon removal rate is 94%.

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Abstract

The invention discloses a method for improving VOCs and malodorous gas treatment efficiency of low-temperature plasmas by regulating and controlling humidity. The method comprises the following steps:determining an appropriate gas inlet humidity range according to the type of selected low-temperature plasmas and components of treated waste gas; adjusting the gas inlet humidity by using a humidityregulator, so that the gas inlet humidity is within the determined gas inlet humidity range; and feeding the waste gas subjected to humidity adjustment into a low-temperature plasma unit, degrading,and discharging. According to the invention, the humidity regulator is used for regulating the gas inlet humidity of the low-temperature plasma equipment, so that the optimal treatment humidity of thecomponent waste gas is achieved, the waste gas pollutant degradation efficiency is improved, and pollutant emission is reduced; and by adopting the method, the waste gas pollutant treatment efficiency can be improved by 10-30% compared with the method for treating the waste gas only by using low-temperature plasmas.

Description

technical field [0001] The present invention relates to a kind of method that adopts low-temperature plasma to process VOCs and malodorous gas, specifically relate to a kind of method that improves the efficiency of low-temperature plasma treatment VOCs and malodorous gas by regulating humidity. Background technique [0002] VOCs and malodorous gases are one of the important sources of exhaust gas pollution. Recently, a series of latest emission standards related to VOCs and malodorous gases (such as GB31571-2015, etc.) issued by my country have put forward stricter requirements for the emission and treatment of VOCs and malodorous gases. [0003] Low-temperature plasma has been applied to the treatment of VOCs and malodorous gases, and has the advantages of low energy consumption, strong adaptability, and fast processing speed. The ionization of water molecules in low-temperature plasma to generate hydroxyl radicals (OH) is one of the important oxidants in low-temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/32B01D53/72B01D53/44B01D53/26B01D53/66B01D53/75
CPCB01D53/26B01D53/323B01D53/44B01D53/66B01D53/72B01D53/75B01D2257/708B01D2259/818
Inventor 郭亚逢隋立华丁禄彬
Owner CHINA PETROLEUM & CHEM CORP
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