The application of low-temperature plasma technology in waste gas treatment With the development of industrial economy, the volatile organic waste gas produced by petroleum, pharmaceutical, paint, printing, coating and other industries is also increasing. These waste gases will not only stay in the atmosphere for a long time, but also spread and drift to distant places, causing serious environmental pollution. These waste gases are inhaled into the human body, Hazards directly to human health; In addition, the uncontrolled emission of industrial flue gas has worsened the atmospheric environment, and the harm of acid rain has attracted the attention of all countries. The acidification of the polluted atmosphere has led to the destruction of the ecological environment. Major disasters occur frequently, causing losses to human beings. Therefore, it is imperative to choose an economic and feasible treatment method.
The traditional treatment methods for degradation of volatile organic pollutants, such as absorption, adsorption, condensation and combustion, are difficult to achieve at low concentrations, while photocatalytic degradation has the problem that the catalyst is easy to inactivate. Low temperature plasma treatment can not be restricted by the above conditions, which has potential advantages. However, plasma is an interdisciplinary subject which includes discharge physics, discharge chemistry, chemical reaction engineering and vacuum technology. therefore There are very few units that can master this technology maturely. Most of the propaganda about using low-temperature plasma technology to treat waste gas is not the real low-temperature plasma waste gas treatment technology.
plasma The principle of volume technology for pollutant treatment is: under the effect of an external electric field, a large number of energy carrying electrons generated by dielectric discharge bombard pollutant molecules to ionize, dissociate and excite them, and then trigger a series of complex physical and chemical reactions, turning complex macromolecular pollutants into simple small molecular safety substances, Or the toxic and harmful substances can be transformed into harmless or low toxic and low harmful substances, so that the pollutants can be degraded and removed. Because the average energy of electrons generated after ionization is 10 ev, the chemical reaction that is difficult to achieve or slow in general can be achieved very quickly by properly controlling the reaction conditions. As a new and high technology with potential advantages in the field of environmental pollution treatment, plasma has received great attention from relevant disciplines at home and abroad.
