Lightweight denitration technology of flue gas for annealing furnace
Aiming at the problem of high denitrification cost due to the large amount of cold air inhalation in the semi-closed flue gas emission system of traditional annealing furnace,the research on lightweight denitrification technolo-gy of flue gas was carried out.Through the establishment of flue gas emission calculation model,the main reasons for the increase in flue gas emissions from annealing furnace are the inhalation of cold air during the combustion process and the emission process.Through the design of the"mountain"-shaped flexible connecting device,it reali-zes the equipment modification without stopping the operation while solving the problem of inhalation of cold air in the process of flue gas emission.After the application of lightweight denitrification technology of flue gas in a do-mestic annealing furnace,NOx emission concentration of the hood annealing unit in the south and north zones de-creased by 37.36％and 41.81％respectively,the flue gas emission decreased by 59.34％and 65.25％respectively,and the flue gas temperature increased by 67.77％and 117.51％respectively.In addition to reducing the one-time investment cost of denitrification equipment and the benefits brought by the non-stop renovation totaling RMB 15.243 1 million,the annual economic benefits can be realized to RMB 5.712 7 million.
annealing furnacelightweight denitrification of flue gasflue gas volumeflue gas temperatureNOx emission
NETL
NSTL
万方数据
