With the continuous improvement of industrialization, the proportion of man-made air pollutants in total air pollutants is increasing, and the harm to human health is increasing. At present, most of the industrial sector emissions of air pollutants: Petroleum and chemical industry, metallurgical industry, power industry, building materials industry and so on, the main harmful gas industrial emissions of pollutants NOx, SO2, P, CO, halogenated hydrocarbons, volatile organic compounds (VOC) such as the adsorption and separation of a brief analysis of governance prospect and feasibility the following:
(1) control of sulfur dioxide;
Sulfur oxides are mainly sulfur dioxide, in the atmosphere, it is one of the largest number of the most widely distributed and most affected by environmental pollutants, the main methods are: control of high chimney dilution, using low sulfur fuel, exhaust gas desulfurization, in recent years by dry (adsorption method), wet desulfurization technology to carry out more study on industrial application is very mature. The removal of exhaust gas adsorption method in SO2 is divided into physical adsorption and chemical adsorption, physical adsorption was the selective absorption of SO2 by heating or step-down desorption, chemical adsorption and adsorption catalysis, the adsorbed SO2 is oxidized by oxygen in the exhaust gas into SO3, the latter with water to produce sulfuric acid.
(2) emission of halogenated hydrocarbons containing trichloroethylene, three dichloroethane and so on
Waste gas containing halogenated hydrocarbons purification the mature technology is solvent absorption or adsorption process, such as: it is widely used in industry of trichloroethylene, are toxic pollutants harmful to human body and environment, including industrial emissions must be removed before the trichloroethylene exceeds the standard, the content of TCE, which can use adsorption of trichloroethylene trichloroethylene in effective control of emissions and exhaust gas recycling.
(3) removal of carbon monoxide from exhaust gas
CO is a flammable, explosive and poisonous gas. It will pollute the environment seriously when it is discharged to the atmosphere without treatment. Therefore, it is very important to strictly control the CO content in the exhaust gas.
(4) PSA rich oxygen treatment of municipal waste gas;
With the continuous expansion of the scale of city construction, the amount of garbage generated every day of the city has been increased, mainly by the way of human air burning garbage every day, by burning garbage generated VOC containing toxic gases cause great pollution to the environment; such as the use of PSA technology for oxygen enrichment from air (oxygen purity can reach 93%) alternative city waste air, will greatly reduce emissions of toxic gases.