What is the waste gas treatment process of the mixed lime kiln
The mixed burning lime shaft kiln generates a large amount of exhaust gas during the production process, which includes pollutants such as dust, sulfur dioxide (SO2), nitrogen oxides (NOx), and carbon dioxide (CO2), posing a serious threat to the environment. Therefore, adopting an effective exhaust gas treatment process is crucial.
The first step in the exhaust gas treatment process is dust removal. Due to the large amount of dust particles contained in exhaust gas, these particles not only affect the operation of subsequent treatment equipment, but also cause pollution to the atmospheric environment. Therefore, the exhaust gas will first enter the bag filter for pre-treatment, using the filtering effect of the filter bag to trap dust particles on the surface of the filter bag, and the purified gas will be discharged from the air outlet. Bag filter has the advantages of large air volume, high dust removal efficiency, and stable operation, making it very suitable for dust removal treatment of lime kiln waste gas.
The next step is the desulfurization process. SO2 in exhaust gas is one of the main atmospheric pollutants and requires wet desulfurization technology for treatment. By spraying absorbent (such as limestone slurry) and reacting with SO2 in the exhaust gas, sulfate and water are generated to achieve desulfurization. The key to this step is to ensure sufficient contact and reaction between the absorbent and the exhaust gas to improve desulfurization efficiency.
Finally, there is the denitrification process. NOx in exhaust gas is also an atmospheric pollutant that requires selective catalytic reduction (SCR) technology for treatment. Under the action of the catalyst, NOx in the exhaust gas reacts with reducing agents (such as ammonia) to generate harmless nitrogen and water. SCR technology has the advantages of high denitrification efficiency and stable operation, and is the preferred technology for denitrification of lime kiln exhaust gas.
After dust removal, desulfurization, and denitrification treatment, the pollutants in the exhaust gas are effectively controlled, and the purified exhaust gas is discharged through the chimney at high altitude to ensure compliance with environmental standards. This exhaust gas treatment process not only helps protect the environment, but also enhances the environmental image and social responsibility of the enterprise.
