The hottest organic waste gas treatment method

2022-09-19
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Organic waste gas treatment methods

when necessary, the composition and concentration of organic waste gas can be measured with a viscometer, which is applicable to different organic waste gas treatment methods. The activated carbon adsorption method is the most widely used. However, the activated carbon adsorption method has the disadvantages of high cost of waste activated carbon elution recovery and pollution transfer after the application period expires. Therefore, the new adsorption catalytic combustion method has been widely used in technical transformation or new projects

low temperature plasma purification method is being favored by more and more enterprises because of its advantages of low maintenance cost in the later stage, but it also has the problem of high equipment investment cost. It is believed that with the development of technology and industry, the low-temperature plasma purification technology will become more and more mature, and the equipment investment will also decline. At that time, it will be widely used

Through simple examples, there are direct combustion methods

direct combustion method is to use auxiliary materials such as gas to ignite the waste gas and promote the harmful substances in it to turn into harmless substances under high temperature combustion. This method has the advantages of small investment and simple operation. It is suitable for the waste gas with high concentration and small air volume, but its safety technical requirements are high

finally, organic waste gas is catalyzed by catalytic combustion method, and then the waste gas is heated and converted into carbon dioxide and water without forgetting the national humiliation after catalytic combustion. This method is applicable to the purification treatment of organic waste gas with high temperature and concentration. It has the advantages of low combustion temperature, energy saving, high purification rate, small floor area and so on, but the investment is large

adsorption method can be divided into three types:

direct adsorption method: use activated carbon to adsorb and purify organic waste gas, and the purification rate can reach more than 95%. This method has simple equipment and less investment, but it requires frequent replacement of activated carbon, and frequent loading, unloading, replacement and other procedures increase operation costs

adsorption recovery method: use fiber activated carbon to adsorb organic waste gas, so that it can be blown back by superheated steam in a state approaching saturation, so as to realize desorption regeneration

low temperature plasma purification method

low temperature plasma is the fourth state of matter after solid state, liquid state and gas state. When the applied voltage reaches the discharge voltage of the gas, the gas is broken down, producing a mixture including electrons, various ions, atoms and free radicals

in the discharge process, although the electron temperature is very high, the temperature of heavy particles is very low, and the whole system presents a low-temperature state, so it is called low-temperature plasma. Low temperature plasma degradation of pollutants is to use these high-energy electrons, free radicals and other active particles to decompose pollutant molecules in a very short time, and subsequent reactions occur to achieve the purpose of degrading pollutants

traditional treatment methods of volatile organic pollutants (VOCs), such as absorption, adsorption, condensation and combustion, are difficult to achieve for low concentration VOCs, while photocatalytic degradation of VOCs has the problem that the catalyst is easy to inactivate. Using low-temperature plasma to treat VOCs can be free from the above conditions, which has potential advantages

however, plasma is an interdisciplinary subject that includes basic disciplines such as discharge physics, discharge chemistry, chemical reaction engineering and vacuum technology. Therefore, at present, there are very few units that can master this technology, and most of the publicity of using low-temperature plasma technology to treat waste gas is not a real low-temperature plasma waste gas treatment technology

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