Activated carbon plays an important role in the desulfurization and denitrification processes
Activated carbon desulfurization and denitrification technology has the advantages of low cost, wide adaptability, easy operation, and stable effect. Therefore, it is widely used in flue gas purification treatment in electric power, metallurgy, chemical industry, steel and other industries. Its removal rate can reach more than 90%.
Activated carbon plays an important role in the desulfurization and denitrification processes, especially in environmental protection and air pollution control. This article will introduce the application, principle and effect of activated carbon in desulfurization and denitrification, and explore its potential value in reducing air pollution.
1. Application of activated carbon in desulfurization process
1.1 Principle of desulfurization
Desulfurization refers to the removal of sulfur dioxide (SO2) produced during the combustion process. SO2 is a major atmospheric pollutant that causes serious harm to human health and the environment. Desulfurization methods include wet desulfurization and dry desulfurization, and activated carbon is mainly used in the dry desulfurization process.
1.2 The role of activated carbon in desulfurization
Activated carbon mainly plays a role in desulfurization through catalysis and adsorption. The surface of activated carbon has a large number of micropores and active sites. These micropores and active sites can effectively adsorb SO2 and catalyze the oxidation reaction of SO2 to a certain extent, converting it into sulfuric acid gas or sulfate, thereby achieving detoxification. remove. In addition, activated carbon can also absorb hydrogen sulfide (H2S) in fuel, further reducing sulfur emissions.
2. Application of activated carbon in denitrification process
2.1 Principle of denitrification
Denitrification refers to the removal of nitrogen oxides (NOx) produced during the combustion process, including nitrogen oxides (NO) and nitrogen dioxide (NO2). NOx is a major atmospheric pollutant that negatively affects human health, the environment and atmospheric composition. Denitrification methods mainly include selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR).
2.2 The role of activated carbon in denitrification
Activated carbon mainly plays a role in denitrification through adsorption and catalysis. Activated carbon can effectively adsorb NOx, especially NO2, and reduce its emission concentration. In addition, activated carbon can also catalyze the reduction reaction of NOx and convert it into nitrogen (N2) and water (H2O), thereby achieving removal. The catalytic effect of activated carbon is mainly based on the active sites on its surface and its adsorption capacity for NOx molecules.
3. The potential value of activated carbon in reducing air pollution
3.1 Environmental benefits
The application of activated carbon in the desulfurization and denitrification process can significantly reduce SO2 and NOx emissions produced during the combustion process, reduce the concentration of atmospheric pollutants, improve air quality, and protect human health and the ecological environment. This is of great significance for reducing atmospheric pollution problems such as acid rain, photochemical smog and ozone.
3.2 Resource utilization
Activated carbon is a renewable resource that can reduce resource waste and environmental pollution through regeneration and recycling. At the same time, the regeneration and recycling process of activated carbon can also reduce energy consumption and carbon emissions, which is in line with the concept of sustainable development.
3.3 Technological innovation
The application of activated carbon in desulfurization and denitrification technology has promoted the innovation and development of related technologies and promoted the progress of environmental protection technology. By continuously improving the preparation process of activated carbon, optimizing its performance and reducing costs, we can better cope with air pollution problems and achieve environmentally sustainable development.
Conclusion
Activated carbon desulfurization and denitrification is an environmentally friendly and efficient flue gas purification technology. It uses the adsorption performance of activated carbon to adsorb, reverse react and regenerate harmful gases such as sulfur dioxide (SO2) and nitrogen oxides (NOx) in the flue gas, thereby achieving purification Purpose of Smoke.
Activated carbon has a highly developed pore structure and surface activity, which can effectively adsorb and separate organic and inorganic substances in the air, and is not susceptible to pollution and clogging. During the desulfurization and denitrification process, activated carbon removes harmful substances in flue gas through the molecular sieve effect and chemical adsorption effect. The molecular sieve effect means that the size of the pore structure of activated carbon can limit the adsorption of smaller molecules such as sulfur dioxide molecules into the pores. The chemical adsorption effect is that when the surface of activated carbon has a certain chemical reactivity, it can chemically react with sulfur dioxide in the flue gas to form stable compounds, so that it can be removed.
The process flow of activated carbon desulfurization and denitrification usually includes steps such as spray atomizer, desulfurization adsorption, denitrification adsorption, regeneration and recycling. Under the action of the jet atomizer, the desulfurization and denitrification agents are fully mixed with the flue gas to reach a suitable adsorption state. Then, after passing through the desulfurization adsorption layer, sulfur dioxide is adsorbed by activated carbon to become sulfuric acid, and nitrogen oxides are adsorbed into nitrous acid and nitric acid. Next, the nitrous acid and nitric acid in the denitrification adsorption layer are adsorbed by activated carbon and reduced to nitrogen, while sulfuric acid is also reduced to sulfur dioxide. The regeneration process mainly treats the saturated activated carbon to make it active again to ensure its adsorption effect. The regeneration process generally adopts thermal oxidation and steam regeneration.
Activated carbon desulfurization and denitrification technology has the advantages of low cost, wide adaptability, easy operation, and stable effect. Therefore, it is widely used in flue gas purification treatment in electric power, metallurgy, chemical industry, steel and other industries. Its removal rate can reach more than 90%. Compared with other desulfurization and denitrification technologies, it has obvious efficiency advantages. At the same time, this technology can be used independently or as an auxiliary means for other desulfurization and denitrification technologies to improve the efficiency of desulfurization and denitrification.