In the smelting process of recycled aluminum waste, the main sources of waste gas are fuel combustion waste gas, the combustibles contained in the waste aluminum itself, and the waste gas dust generated by the reaction of additives and furnace liquid impurities. These waste gases contain metal oxides, sulfur dioxide, dust and other harmful substances, will cause serious pollution to the environment.
For these pollution sources, the treatment methods can be started from the following aspects: First, the environmental treatment needs to be controlled from the source, such as strengthening the pretreatment and classification of waste, as far as possible to make a variety of waste comprehensive utilization, reduce the amount of pollutants; Secondly, try to use pollution-free additives; Finally, improve the smelting technology to reduce the amount of waste generated.
In the smelting process of recycled aluminum waste, the emission of nitrogen oxides is large, which causes serious pollution to the environment. In order to effectively control this pollution, the following methods can be taken:
1, low nitrogen combustion technology: through the use of low nitrogen fuel and improved combustion technology, you can reduce the amount of nitrogen oxides generated during the combustion process.
2, flue gas denitrification technology: this is a widely used nitrogen oxide treatment technology, it converts the nitrogen oxides in the flue gas into harmless nitrogen and water vapor through chemical reaction, thereby reducing the emission of nitrogen oxides.
3, selective non-catalytic reduction method (SNCR) : This method is through the injection of ammonia or urea and other reducing agents, in the case of no catalyst, the nitrogen oxide in the flue gas is reduced to nitrogen and water vapor.
4, selective catalytic reduction method (SCR) : similar to the SNCR method, SCR method is also through the injection of ammonia or urea and other reducing agents, but in this method needs to use a catalyst to improve the efficiency of the reaction. Although these technologies can effectively reduce nitrogen oxide emissions in the smelting process of recycled aluminum waste, the specific technology needs to be determined according to the specific production conditions and environmental protection requirements.
The SCR denitrification system independently developed by GRVNES the functions of compact design, intelligent, precise injection, forecast alarm, data collection management, remote control, online transmission and other functions in the field of nitrogen oxide emissions, which can ensure that the ammonia escape data is less than 3ppm while achieving ultra-low emissions, and has a strong comprehensive competitiveness.
Post time: Nov-27-2023