The Present Situation of Combined SO_2/NO_x Removal Technology from Flue Gas

摘要

The mainly pollutant from coal-fired power plants are SO_2 and NOx- Equipments of desulphurization and denitrification step by step are expensive and have a lower efficiency. Comparing with them, Combined Removal of SO_2 and NOx technology have great advantages, such as, the simplified complication, better operation property, lower cost and less using area. So Combined Removal of SO_2 and NOx in one system become the keystone in the research of cleaning technology .On the base of looking up a lot of references, this paper makes a detailed introduction about Combined Removal of SO_2 and NO_x technology lately in China and other countries, including the removal principle, the mainly advantages and defects, the present situation and the application of technology. The contrast of economic and technical standard is given .Through analysis, synthesis and comparison of two kinds of technology- Combined Removal of SO_2/NO_x in boiler and in flue gas, the key of research in future is found out. These contents can reference in improvement and exploiture of technology later.